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All You Need to Know About an Industrial LCD Display

Everything About Industrial LCD Display

Industrial LCD display systems have become a backbone for all sorts of businesses in today’s technologically advanced world. It is critical to choose the right type of monitors and display machines for the success of your business.

Unfortunately, most businesses are still not fully aware of industrial displays. Many people would be thinking if their business requires such systems. In this article, we will discuss everything that you should know about industrial displays. We will cover the different types of industrial displays and try to help you develop a complete understanding of these displays.

Industrial LCD display

Introduction

Industrial displays are machines that businesses use to display digital output. These machines include various types of TFT displays, digital signage, monitors, and such equipment. All such machines combine to perform multiple tasks that are as below:

  • Display and record relevant physical quantities
  • Helps in various tasks in laboratories
  • Show products/services and relevant information interactively to consumers
  • Automation of different processes in the industry

Machines and monitors in professional industrial systems are not like typical home television sets. An industrial LCD display is robust and tough enough to work in the long run. The exteriors and inside modules of these machines are created with the help of top-quality industrial-grade components.

A display machine in the industrial screen systems may be mounted or fixed in a workplace. However, some portable small monitors and digital loggers are also available. You can conveniently carry these data loggers with you everywhere you go without any hassle.

Who Uses an Industrial Display System?

Industrial displays have become necessary equipment for any business or industry around. All developed countries, including the USA and China, are using different types of display systems and monitors in various industries. You can think that the entire world right now practically operates smoothly with technologies, like industry-grade display machines.

For example, hospitals are using monitor systems with other equipment in the hospital to monitor patients. Monitors you see in local stores and supermarkets are another example of an industrial LCD display. Such displays work in combination with POS (point of sale) systems for product inventories, and cashier work, etc. Here are different fields and businesses where industrial LCDs have become essential equipment:

  • Civil electronics
  • Medical and beauty
  • Energy project
  • Precision instrument
  • Public transfer
  • Automation
  • Machinery
  • Electricity equipment

There are many other uses of industrial LCDs in many industries apart from the ones listed above. From large government agencies to small entrepreneurs, industrial displays are simplifying work and ensuring better services.

Anatomy of Industrial Display Machines

Industrial display monitors typically comprise metals and glass. Metals can be stainless steel and aluminum for the chassis. Moreover, most industrial displays come with a robust framework or chassis and rugged display. Manufacturers of the industrial LCD display make sure that the exterior of the monitor is highly robust to withstand the harsh environment and constant usage. Keep in mind that industrial displays are usually installed outdoor.

The exterior of modern-day monitors comprises microprocessors, a display device of the screen, and circuits. A touchscreen display needs highly advanced circuitry with the core technology behind it. Some examples of touchscreen technologies are infrared grid, capacitive, and resistive. Furthermore, the monitor is usually the TFT display module in combination with the LED backlight. Raw materials to assemble industrial displays usually come from Korea, Vietnam, and China.

Tips to Choose the Right Industrial LCD Display

When looking for an industrial display, you will find out a variety of display monitors in the local market. Therefore, how would you choose the best industrial display for your business? Here are the important tips you should follow in this regard.

Industry’s Demand

When searching for an industrial LCD display, it is vital to know the demands in the industry. First of all, ask yourself a question that whether you need an ultra-bright screen? It is critical to know whether you will install the display outdoors or indoor. The device will be an interactive display or people will use it constantly? What rating of protection do you require from your screen? You must ask yourself all these questions when looking for the industrial display.

It is essential to understand the features of the monitor that directly impacts the automation of the business practices and customers’’ experiences. When you know your business needs and industry’s demands, it would become easy for you to pick the best monitor screen for your application.

Choose a Rugged Display

It is critical to choose a rugged display monitor. If the rigged display combines with a robust framework chassis, it will become ideal equipment for any business or industry. Fortunately, most industrial displays are available this way. High-quality chassis and rugged displays contribute a lot to the durability and toughness of the display.

Displays with such features last longer and withstand frequent daily use. Such systems are also best when it comes to resisting tough handling. You must choose a highly robust monitor if a huge number of people will be using the industrial display monitor daily.

Screen’s Brightness Levels and Readability

The main objective behind installing an industrial LCD display is to let your employees and customers take full advantage of the convenience features of these displays. Therefore, make sure that the brightness levels and readability of the screen are good enough for the end-users. It is necessary to ensure that the screen you choose has adequate contrast levels. It will ensure convenient readability for intended users.

Always opt for the industrial display that allows you to adjust brightness levels as per your need, if possible. If you are looking for an outdoor display, make sure that the screen offers ample readability in the sunlight.  You can also improve the readability of the screen with an anti-reflective coating.

Conclusion

An industry-grade display system is a high-quality display and monitor solution. The display varies in size and type according to the specific industry needs and requirements. The common industrial LCD display denominators include higher brightness capacity, durable chassis, display output support, anti-reflective coatings, and TFT screen panels. You can choose between non-touch and touchscreen monitors according to your specific requirements. You can mount an industrial display using VESA, panels, racks, and walls mounts.

Contact us for more information on the industry-grade display system.

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How to Find the Best 10.1 inch LCD Supplier?

Find the Best 10.1 inch LCD Supplier?

Before we get down to finding 10.1 inch LCD supplier, let us focus on the technology. Geek-style monitors for an embedded computer unit consist of TFT 10.1” LCDs. A TFT LCD is a thin film transistor liquid crystal display. This technology improves image quality, such as contrast and addressability. 10.1” LCDs are known for their ultra-thin size, high resolution, and supports for various video formats.

These LCDs have compatibility with Raspberry Pi B+/2, B, and A+. They also support personal computers and Beagle. In this article, you will learn how to find the best 10.1 inch LCD supplier to buy the best unit.

10.1 inch LCD Supplier

Tips to Find the Best 10.1 Inch LCD Supplier

Various manufacturers are suppliers of 10.1 inch LCD are available on the market. Therefore, it is important to find the most reliable 10.1 inch LCD supplier to make sure you get the best product. Keep in mind that several online suppliers sell low-quality LCDs, so you need to avoid them. The question is how you would identify the best supplier as there are so many. Here are some important tips that can help you find a reliable supplier.

1. A Local Store or Supplier

If you need only one LCD, then you can easily buy it from a local supplier or store. Things become complicated when you need LCDs or LEDs in large quantities for commercial purposes. If you need multiple units, then we recommend you to look for a wholesale 10.1 inch LCD supplier. In that case, make sure that the supplier offers a broad range of LCDs with different features. Also, make sure that the supplier offers secure and safe delivery of the unit at your location.

2. Do Online Research

When looking for LCDs in bulk quantity, you can search online for the best LCD suppliers nearby. Several wholesale suppliers and manufacturers are available online to answer your queries. By doing a little research online, you can find a reputable supplier around. You can read customer testimonials and reviews about different manufacturers and suppliers. It will help you identify the best available LCD supplier selling 10.1 inch LCDs.

3. Complete Solutions

A reputable or reliable LCD supplier should offer a complete solution for LCD requirements. Inquire about the available solutions that you may need along with the LCD. For instance, you may require some accessories related to the 10 inch LCD in the future. If you know that the supplier offers a complete solution for your LCD unit, you will not have to go anyplace else when required. Therefore, look for a 10.1 inch LCD supplier that offers a complete solution for your LCD unit.

4. Customer Support

Every credible and highly reputed LCD supplier should have exceptional customer support services for the customers. It means that you don’t have to wait for hours or call their support again and again for a query. Highly reputable LCD suppliers pay special attention to deal with their customers. They must guide you in a friendly way about whatever issue you need to inquire about.

To know the customer support standards of a supplier, you should call them. See if they respond quickly or make you wait for hours. Professional suppliers take your calls immediately and appropriately help you.

5. What Types of Industries They Serve

Different industries have different LCD requirements. For example, military and aerospace industries require higher quality standards with geographical manufacturing restrictions. Other industries, like automotive, consumer, and industrial markets have specific requirements. Thus, you must inquire about the industries that the 10.1 inch LCD supplier serves. Ideally, a highly reputable supplier serves multiple industries with a complete range of LCDs and solutions.

6.  Do Not Fall for Traps

Budget is a key player in buying any product or service. Usually, people want to buy LCD units at the most affordable rate which is their right. You will find some suppliers with claims of being highly cheap in terms of pricing. You need to understand the difference between being competitive and being cheap. Keep in mind that you can never find high-quality LCDs at cheap rates. Instead, you should look for competitive prices.

You can shortlist a few reliable suppliers and see their rates for the same LCD unit. This is how you can identify the most reliable supplier with competitive rates. Remember that buying a cheap price LCD means low-quality results and premature failure of the device.

7. Ask for Recommendations

One of the straightforward ways to find a reliable 10.1 inch LCD supplier is to ask for recommendations. Look around and try to remember people you know who recently bought 10. Inch LCD(s). You can ask your friends, colleagues, and neighbors if they know a reliable LCD supplier. If anyone of them knows one, it will save your time and help you buy the best unit from a reliable supplier.

8. Can the LCD Unit Handle any Change?

We see fast upgrades in the gadgets world, whether it is an LCD or any other electronics item. Such upgrades are important to keep the device compatible and running with the latest ever-changing technology. Reliable display vendors keep this in mind when manufacturing LCDs. Before you buy your 10.1 inch LCD from a supplier, ask them if the unit is capable of handling future changes. Never invest in an outdated LCD unit because it would be a piece of scrap in the future.

We hope that you can find a reliable 10 inch LCD supplier by following the above tips. There are many manufacturers and suppliers like Jinweishi Photoelectric Technology Co., LTD that you can trust. If you need one or a couple of LCDs, you can also consider online stores like Amazon and eBay.

10.1 inch LCD supplier

Take Away on 10.1 inch LCD supplier

There are multiple uses of a 10.1 inch LCD in different industries, such as automotive, industrial, and consumer markets. Since there are many manufacturers and suppliers, you need to do a little research to find the most reliable source to buy your LCD(s).  It can be a local store or supplier or a wholesale supplier from where you can buy LCDs in bulk quantity.

Make sure that the supplier has a good overall reputation and offers a complete range of 10.1 inch LCD solutions for different markets. Never buy a low-quality LCD unit as it will probably experience a premature failure, making it a costly investment in the long run.

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Top 5” LCDs from the Best 5 inch LCD Supplier and Manufacturers

LCDs from the Best 5 inch LCD Supplier and Manufacturers

A 5 inch TFT LCD is an ideal solution for people who need a bigger, high-resolution display for the Raspberry Pi. Usually, these high-quality 5 inch LCDs support 800x480p resolution. However, the resolution varies with different models and displays. It is straightforward to get the Pi on a display board. Normally, the package of a 5 inch LCD includes screws needed for attaching the Pi on your display board. These LCDs are panel-mountable mini HDMI monitors that are simple and small. Yet, it is simple to connect these displays with a computer via HDMI output. The compact shape of 5 inch LCDs also makes them perfectly compatible with any electronics product. Today, we will list the best 5 inch LCD supplier products that you can trust.

5 inch LCD supplier

If you are looking for high-quality 5 inch LCDs for a specific use, then this article is for you. Let us help you choose the best unit.

Best 5 inch LCDs from Reliable 5 Inch LCD Supplier

You would find numerous LCD suppliers and manufacturers in the market. Since 5” and 10” LCDs have become popular for their diverse applications, more and more companies are manufacturing these displays. Therefore, it can become a little complicated process to buy the right 5” LCD from a reliable 5 inch LCD supplier or manufacturer. To make things easier for you, here are the top 5” LCDs from dependable suppliers that you can buy.

1. ELECROW 5 Inch Raspberry Pi Screen

It is a mini HDMI LCD screen with 800x480p resolution from a well-known LCD manufacturing brand ELECROW. This 5” LCD is known for high resolution, full-color display, quick response time, and broader viewing angle. You can manually control the backlight of this LCD and turn off the backlight switch for lower energy consumption. It is a resistive touchscreen display that you can also operate with a pen. You will get the touch pen inside the LCD package.

It supports Raspberry Pi 2B+, 3B, 3B+, and 4 devices. The best part is that you can also use it with a standard HDMI-supported device, like your PC monitor. To do so, you require a power supply of 5V/2A and set the device to 800x480p resolution. However, the touch functionality of the device will not be available with this setting. Along with the 5” HDMI monitor, you will get a touch pen, a CD, 4pcs of copper pillars, and an HDMI adapter.

2. 5 inch HDMI LCD (H)

It is another reliable 5 inch LCD with RoHS compliance from a reliable 5 inch LCD supplier. It is a capacitive 800x480p resolution display that supports numerous systems. The best thing about this display is that you can use the software to configure the resolution up to a resolution of 1920x1080p. It supports mini computers, like Raspberry Pi, BB Black, Banana Pi, and Jetson Nano. Additionally, you can also use this 5 inch LCD with your desktop computer.

This LCD also supports gaming consoles, such as Sony PS4, Nintendo Switch, and Microsoft XBOX 360. Therefore, it also becomes a great choice for gamers. The OSD menu of this product is available in multiple languages for contrast/brightness adjustment and power management. There is an audio jack (3.5mm), audio HDMI output support, and speaker connector. You will get one HDMI cable, one HDMI to Micro-HDMI adapter, a Type-A USB plug to Type-B micro plug cable, and a pack of RPi screws.

3. JWS 5 Inch LCD High Resolution 800x480

It is one of the best transmissive color active-matrix LCDs that use TFT as a switching device. This LCD consists of driver ICs, a backlight unit, and a TFT display panel. It is a perfect 5 inch LCD for many home appliances, commercial displays, instruments, elevators, and PIN pads, etc.  JWS is one of the top TFT LCD brands manufacturing LCDs for 10+ years. This brand offers customized solutions according to the specific requirements of different industries.

The JWS 5 Inch LCD is a diagonal display with 800 x 3(RGB) x 480 resolution. It has an anti-glare surface treatment and digital interface. Apart from 5 inch LCDs, JWS also manufactures touchscreen displays in other sizes, such as 10.1 inches, 10.4 inches, 7 inches, and 4.3 inches. Therefore, you can get LCDs in different sizes from this brand.

4. 5 Inch 800x480 TFT LCD HD Screen Monitor

Are you looking for a reliable automotive 5 inch LCD supplier? If yes, then this 5 inch LCD is a perfect choice for you. It is a high resolution 800W x RGB x 480H TFT LCD with 2 ports for video output. It comes with a rearview priority parking feature that automatically starts up and displays video from the rearview camera. This LCD supports video equipment, such as a camera, VCD, and DVD. There is no audio output or input in this LCD. The reasonable price of this LCD is another positive point of this 5 inch LCD.

Keep in mind that this LCD monitor is only for cars. Therefore, it requires a DC 12V power supply and a temperature between -120 to +50 centigrade. The material of this LCD is high-quality plastic. The package includes one car monitor, one adhesive bracket, one power cable, and one user manual. The user manual is available in the English language only. You can mount this LCD on the dashboard of your car.

All four LCD monitors discussed above are 5-inch monitors with high-quality material and exceptional resolution. You can compare these monitors to know the best choice according to your specific needs.

5 inch LCD supplier

Conclusion

Various brands are available in the market selling 5 inch LCD monitors for different use cases. You need to find the best 5 inch LCD supplier to get the most reliable 5 inch LCD unit for your use. All the products covered in this article are from top LCD manufacturing brands. You can buy any of these products with the assurance that the product will perform flawlessly in the long run.

However, proper care and maintenance are necessary to avoid premature failures. You should read the user manual that comes with the product and do proper care and maintenance according to the given instructions.

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HMI Design: Right Practice for Reliable HMI LCD Display

HMI Design: Right Practice 

HMI design technology is one of the reliable practices to build an HMI LCD display. The HMI screens are intuitive screens for users. These screens are efficient in terms of operation and they also do not create stress on the eyes. Control systems have shifted from conventional push buttons to HMI displays within manufacturing. Therefore, the HMI design technology has become a great technology for new installations. There is an array of HMI design-based systems. However, the fundamental principles of a good HMI design system are always the same.

smart home LCD display

Today, we will discuss the HMI design considerations and different essential considerations. It will help you a lot if you are looking for an HMI screen display. Therefore, let’s start the discussion by sharing some important information on choosing the right HMI hardware.

HMI LCD Display Systems: Choosing a Suitable HMI Hardware

HMI screens are available in different sizes, buttons, colors, and user inputs. It is necessary to know about all parameters and their effect on the design. Most OEMs (Original Equipment Manufacturers) manufacture HMI screens in various sizes. Small size screens are available at lower costs, but they are not suitable for large system designs or when you require more details.

HMI LCD display size plays a key role in how sophisticated the design would be. Usually, it is a possibility to change a smaller screen design onto the big-size HMI screen. It is recommended to shrink elements for larger screens. It is always great to create extra pages that could break down HMI screens.

Usually, OEMs never restrict elements quantity on the specific screen, but a dedicated small screen usually comes with low RAM as compared to larger ones. It leads to some latency problems when adding more elements. Here are the important points to known.

  • Always choose an appropriate screen size for your system.
  • Never shift the HMI design of a large screen on a small screen. Instead, you should redesign individual screens.

These points are important to keep in mind when choosing an HMI LCD display for your application.

Touch Screen vs. On-Terminal Push Buttons

Although push buttons terminals are not very popular these days, some OEMs, such as Allen Bradley and Siemens are releasing HMI terminals with push buttons support. These terminals enable various HMI designs that depend on such inputs. Additionally, Allen Bradley is still offering support for the push buttons terminals to accomplish navigation.

Such terminals require different configurations as compared to their pure touchscreen counterparts. It is because you usually need to benefit from such functionalities for key functions, navigation, or otherwise. So, the HMI design will be different. Here are the different points to keep in mind in this regard.

  • For HMI design controls, minimize the external buttons use. The touchscreen feature is the most suitable solution for every kind of HMI design.
  • Physical buttons HMI programs are difficult to move to touchscreens. Therefore, you must plan the software accordingly.

The HMI screen design differs according to the data structure of the HMI. Design patterns also differ for the distributed and machine HMI design.

HMI Screen Design

An HMI LCD display could be simple or complex according to the dictation of the system. Usually, an HMI display should offer the essential information required but shouldn’t confuse the operator. You should break down a complicated system into sub-systems if it needs an array of tags. You can utilize a control system’s physical layout for the HMI design.

Example: HMI Design Plant for Food Processing

  1. Plant Overview: A high-level status of every single area as well as critical assets
  2. Area Control/Overview: Area overview/control screen for all manufacturing zones; refrigeration, packaging, and production. Control scheme to help a user set high parameters for every production area. For example, production rates, and temperature, etc.
  3. Line Control/Overview: Each packaging/production line must have a higher overview screen level so the user should easily check the asset, stop/start line, and parameters adjustment status.
  4. Asset Control/Overview: Every single asset on the production line (barcode scanner, palletizer, filler, and case packer) must have a control screen and overview. Such elements help operators in monitoring asset status and granular parameters change like case size and motor speed, etc.

Utilizing HMI Faceplates

You can easily create an interface for an array of elements using faceplates on your HMI screens. Such elements may be motors, pumps, valves, and more. You can design a faceplate as the pop-up on the upper side of your main screen as required. These designs help programmers in developing a particular interface where an operator can monitor data on the main display while making necessary adjustments on the secondary display.

Example: When the operator is monitoring the main overview screen, he may decide to adjust conveyor belts’ speed for slowing down the production downstream.

Position: It is ideal to place the faceplates in the center within the parental screen. However, there can be some exceptions so the screen elements might be hidden in that case.

Size: A pop-up screen that is 50% smaller in size than a parent screen is ideal. However, it relies on the specific needs of the system used.

You must focus on the above-discussed position and size guidelines. They are necessary to ensure a perfect HMI design.

smart home LCD display

Conclusion

HMI Designs need an engineer to keep in mind various software and hardware aspects for a perfect HMI LCD display. The objective should be to create a design that is efficient, system-specific, and intuitive. When looking for an HMI design terminal, it is essential to consider all protocol requirements, system parameters, and hardware features. When creating an HMI screen, it is necessary to consider screen layout and navigation layout before completing the system design. The navigation dictates how a user would move among the screens. On the other hand, the design of the screen dictates the efficiency of the usage.

Creating the right HMI design is a skillful art. However, certain primary principles and rules are necessary to follow in different industries. You can call us for further queries about HMI designs and screens.

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How to Buy the Best Smart Home LCD Display TV?

How to Buy the Best Smart Home LCD Display TV?

When looking for a television, you will have a variety of options to choose from. There are options, like smart home LCD display, HDR, 4K, OLED, and LED, etc. The television market gets technology updates too often. Because of the immense variety in types of television or screens, it might get a little confusing to choose the right type of LCD screen.

smart home LCD display

Therefore, if you are finding it a little hard to choose the best display, this guide is your great helping hand. You should read this guide till the end to make an informed decision about the type of smart LCD you want to buy.

Things to Know Before Buying SMART HOME LCD DISPLAY

There are a few imperative things and factors you must know before you buy a smart home LCD display. First of all, you need to know what type of display you need for your television. It is the basic thing that determines the quality of the display you will experience.

Apart from that, other necessary factors include screen resolution, screen size, display refresh rate, sound, and the price of the display. It is also important to know the connectivity options available on the display. For example, some LCDs come with wireless connectivity and many won’t.

Difference Between OLED, QLED, and LED

The screen is the most important aspect of every television. Various panel technologies are available with different characteristics. You can choose from a broad range of technologies, like standard LCD or plasma.

There are so many new screens available on the market to buy. Here is the basic information that you must know about different screen technologies before buying your smart home LCD display:

OLED QLED LED
Motion Blur Perfect Great Good
Black Level Perfect Good Good
Color Volume Good Great Good
Viewing Angle Great Poor Poor
Luminosity Good Great Great
Image Retention Poor Great Great
Grey Uniformity Good Average Average

 

LEDs are a great option in terms of price and availability. Now, let’s take a quick look at the most popular display technologies for a better understanding.

OLED Screens

OLED screens are one of the most popular screen technologies available on the market. However, OLED (organic-light-emitting-diode) is a highly expensive television technology at the moment. This technology uses individual light-emitting organic pixels when electric current moves through it. OLED televisions are known for great black levels.

LCD or LED

If we talk about the most popular television screen technology these days, then it is LCD-LED. Or, it is simply marketed as LED. It has a similar liquid crystal screen display, but it comes with LED backlighting. It makes the television slimmer with smaller borders.

This smart home LCD display also offers a much brighter and better viewing angle. The best part is that LEDs are known as the most energy-efficient display screens that help you save a lot of money. It is one of the basic reasons behind the immense popularity of LED TVs.

Quantum Dot

Quantum Dot is also known as QLED. It is the latest screen technology in the market that relies on quantum dots for producing colored light. There is a special layer that improves the colors and brightness of the television.

These screens perform better than standard LCD-LED screens in many aspects. Quantum Dot is an uncommon, relatively new, and expensive display technology.

Samsung is the most premier manufacturer of Quantum Dot TV screens in the market. Since the technology is uncommon and expensive, so it is only available on high-end televisions. However, the price of QLED screens is still a little lower than OLED TVs.

Screen Size

Whether you wish to purchase a high-performance or basic television, the most vital factor you need to consider will be the size of the screen. How many people you have in your home can help you choose an appropriate screen size.

It also depends on the place where you will use your TV. Therefore, choose a smart home LCD display that is right according to space and family members in the house. Another key factor is your budget. Remember that larger screens are expensive than smaller screens.

Screen Resolution

Screen resolution describes how many pixels are there to complete the screen picture. More pixels mean finer details and sharper pictures. Keep in mind that higher resolution is necessary if you want to experience greater picture results. Full HD remains an industry standard for a long that is still known as a high-quality resolution across the world.

Several manufacturers are now offering TVs with Ultra HD resolution, also known as 4K screens. With 4K resolution, even smaller objects have greater detail. The latest advancement in screen resolution technology is 8K that offers extremely higher resolution. 4K and 8K resolution sets are much expensive than standard Full HD TVs.

Refresh Rate

A higher refresh rate (RR) is ideal in the world of smart home LCD display technology. 60 Hertz is a standard refresh rate. However, this rate is not sufficient for scenes with quickly moving objects as it would blur the image on the screen.

120 Hertz is the most optimal refresh rate that is necessary for some high-end games. Therefore, it is essential to buy an LED-LCD that has a higher refresh rate.

Connectivity Options

When searching for the right television, it is critical to take a look at how many HDMI inputs are available in the set. You can use such ports in numerous ways.

For example, you can use them to add a soundbar, a gaming console, and a chrome cast, etc. If you want to buy a 4k HD TV, make sure that the set offers HDMI 2.0 support so it can accommodate Ultra HD connections in the future.

smart home LCD display

Final Words

Buying a smart home LCD display requires you to consider a lot of important factors. Of course, your budget is a basic factor in deciding about the type and resolution to buy.

However, there are some common concerns, such as connectivity options, refresh rate, screen size, and screen technology. You must learn about these factors and choose your TV accordingly to buy the best available LCD-LED for your home.

To know more about smart home LCD technologies available, you can talk to us anytime.

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Differences between a Medical LCD Display and Consumer Display

Medical LCD Display and Consumer Display

LCDs or LEDs have become a necessity of every home, office, commercial, and healthcare facility these days. From entertainment to security and more, LCDs have many uses in different industries. A medical LCD display is a kind of display or screen that fulfills the requirements of medical imaging. Usually, these displays come with tailored technologies, like image-enhancing, to achieve consistent brightness in the long run. Medical displays are also known for ergonomic reading, noise-free images, and DICOM compliance.

medical LCD display
In our today’s post, you will learn the basics of a medical display. We will share a comparison between consumer displays and medical displays for a clearer picture.

Consumer Display vs. Medical LCD Display

A consumer display comes with specifications to accommodate medical-grade displays. These displays usually cost less. However, there are many other considerations than just specifications. Therefore, you may have a question that why opt for medical displays? The key benefit of a medical LCD display is that it automates calibration and quality assurance to ensure round-the-clock compliance with necessary medical standards. Another significant benefit of a medical display is its maximum uptime. These are the traits that make the medical display so reliable.

Moreover, the total medical display ownership cost is usually less than consumer displays. Their maintenance and installation costs are lower than consumer displays for which medical displays become the most viable and cost-efficient option. Apart from that, a medical display presents more detailed and higher-quality medical images. What’s more, these displays offer exceptional advantages in terms of comfort and workflow.

Enhanced Reading Accuracy

A medical LCD display is known for its optimized reading accuracy. It is one of the key reasons why these displays are suitable for the medical industry. Here are the different traits of medical displays that you should know.

1. Brightness

Latest consumer displays offer astonishing brightness initially, but they degrade too often over time. A medical display has the capabilities to perform 1000 cd/m or even more. More importantly, the output of the luminance remains stable over time. It means that the display will stay DICOM 3.14 compliant all the time. Therefore, the brightness of medical LCDs makes the reading experience convenient.

2. Noise

Most medical systems deal with noise problems through technologies, like integrated uniformity. Medical displays offer enhanced grayscale presentation and stable brightness. It ensures exceptional visualization of refined radiographic abnormalities. So, medical displays are also better than consumer displays in terms of noise.

3. Viewing Angle

The viewing angle of any display determines the overall readability quality of the screen. The best thing about a medical LCD display is that they are ACR compliant and preserves at least 350cd/m. These displays also ensure exceptional color values and a higher contrast ratio under various viewing angles. So, the better viewing angle of medical LCDs makes them a superior alternative to consumer displays.

For the above-discussed traits, medical displays ensure far better reading accuracy than consumer displays. This is why medical-grade LCDs are preferred displays in the medical industry.

Reading Comfort and Workflow

Medical-grade displays are also known for improved workflow and reading comfort. Here are the different reasons why they have an edge over consumer displays in terms of reading workflow and comfort.

1. Multi-modality Imaging

Various medical-grade displays have special designs for multi-modality imaging. Therefore, this display design ensures multiple modalities viewing (both grayscale and color) on one screen. It enables image fusions and side0by-side comparisons immediately, without switching the display. So, multi-modality imaging is a prime benefit that comes with medical-grade displays.

2. Ergonomic Reading

A recent study concluded that about 87 out of 100 radiologists experience a kind of physical distress while reading images. A few medical-grade screens come with non-reflective glass and special built-in features for enhanced reading ergonomics. For instance, you can look for a medical LCD display with features for boosted display brightness and controlled ambient lighting.

Some high-end medical-grade displays have special designs to present medical images within an ideal vision field to ensure easy visual acuity. Usually, medical screens are bigger size screens. Therefore, you can easily view the entire image on one screen without panning or enlarging the image. There is another feature called scale-to-fit which makes reading on a medical display more ergonomic and efficient.

From the various benefits and features we shared above, it is conclusive that medical displays are a much better alternative to consumer displays in the medical industry. Therefore, you should not opt for consumer displays if you are looking for a screen for a medical or healthcare facility.

Different Uses of Medical-Grade Screens

There are different uses of medical-grade screens or monitors within medical facilities. Let’s take a quick look at the different uses of these screens.

Point of Patient Care: Medical-grade screens are suitable for use at patients’ points of care within a healthcare facility. Usually, these displays are VESA-mounted devices and run on hot-swappable batteries, making them a perfect display option for point of patient care.

Operating/Surgery Room: Surgeons require a detailed and precise display for patient surgeries in operation rooms. Only a medical LCD display can fulfill unique challenges and conditions in a surgery or operating room. You can buy a 4k medical-grade display for excellent resolution and clarity.

Diagnostic/Radiology Imaging: For radiology or diagnostic imaging, the display needs to present unparalleled clarity. The display must offer HDR (high-dynamic range) so that the radiologist can work efficiently. Fortunately, medical displays offer HDR and 4K resolution, which make them the best screens for radiology imaging.

Clinical Review: Medical specialists often require a secondary display for modality viewing and PACS. You can use medical displays for both secondary and primary display purposes. Medical displays are also available with touchscreen functionality, making them a more convenient solution for clinical review display needs.

Medical-grade displays are the most ideal screens when you need a display for purposes like medical imaging. These displays are much better than consumer displays in terms of readability, brightness, noise, and viewing angle. A medical LCD display fulfills certain requirements for medical regulations, quality assurance, and image quality. Therefore, you must prefer medical-grade displays over normal consumer displays for the many advantages that these displays offer.

If you still have any questions about medical-grade displays, you can feel free to contact our representative, anytime.

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Benefits of LCD screen module

Benefits of LCD screen module

LCD, TFT, IPS, AMOLED, P-OLED, QLED are a partial list of display technologies that can be found in the mainstream consumer electronics market today. But what do they all mean? How does IPS differ from AMOLED, and is such a comparison true? We will tell you how they work, what advantages and disadvantages they have, and whether there is a difference between them from the point of view of the end user.

LCD

Liquid Crystal Display, that is, a liquid crystal display - it was this technology in the late 1990s that made it possible to transform monitors and televisions from comfortable beds for cats with cathode ray tubes inside harmful to humans into thin, elegant devices. She also opened the way to the creation of compact gadgets: laptops, PDAs, smartphones.

Liquid crystals are a substance that is both fluid, like a liquid, and anisotropic, like a crystal. The latter quality means that with different orientations of liquid crystal molecules, optical, electrical, and other properties change.

Smartphone screen types: an end to the confusion

Crystalline, liquid crystal, liquid: crystals change to another state of aggregation under the influence of temperature

In displays, this property of LCDs is used to regulate light conductivity: depending on the signal from the transistor, the crystals are oriented in a certain way. In front of them is a polarizer that "collects" light waves into the plane of the crystals. After that, the light goes through an RGB filter and turns red, green, or blue, respectively. Then, if not blocked by the front polarizer, it appears on the screen as a subpixel. Several of these light fluxes are connected to each other, and on the display we see a pixel of the expected color, and its combination with neighboring pixels is capable of producing a gamut of the sRGB spectrum.

Smartphone screen types: an end to the confusionLCD pixel circuit

When the display is turned on, the backlighting is provided by white LEDs located around the perimeter of the display, and is evenly distributed over the entire area thanks to a special backing. This is where the well-known "diseases" of LCD arise. For example, the light still reaches the pixels that should be black. In old and low-quality displays, "black glow" is easily distinguishable.

It happens that the crystals "get stuck", that is, they do not move even when receiving a signal from the transistor, then a "dead pixel" appears on the display. Due to the specifics of the light source, white flares can be seen at the edges of LCD monitors, and smartphones with LCD cannot be absolutely frameless, although both generations of Xiaomi Mi Mix and Essential Phone strive for this.

Smartphone screen types: an end to the confusion

Backlight and LCD backing Apple iPod Touch

However, in the specifications of devices, we are used to seeing not LCD, but mysterious TN, TFT, IPS or even Retina. Let's figure out what this means.

TN, or TN + film . In fact, Twisted nematic is a "basic" technology that involves polarizing light and twisting liquid crystals into a spiral. Such displays are inexpensive and relatively easy to manufacture, and at the dawn of their existence on the market they had the lowest response time - 16 ms - but at the same time they were characterized by low contrast and small viewing angles. Today, technologies have stepped forward a lot, and the more advanced IPS has come to replace the TN standard.

IPS (in-plane switching) . Unlike TN, the liquid crystals in the IPS-matrix do not twist into a spiral, but rotate all together in one plane parallel to the display surface. This made it possible to increase the comfortable viewing angles up to 178 ° (that is, in fact, to the maximum), significantly increase the contrast of the image, make the black color much deeper, while maintaining comparative safety for the eyes.

Smartphone screen types: an end to the confusion Smartphone screen types: an end to the confusion

The difference between TN and IPS matrices in the diagram

Smartphone screen types: an end to the confusion

A clear difference between TN (foreground) and IPS

Initially, IPS matrices had a longer response time and power consumption than TN displays, since the entire crystal array had to be rotated to transmit the signal. But over time, IPS-matrices have lost these shortcomings, in part due to the introduction of thin-film transistors.

TFT LCD. In fact, this is not a separate type of matrix, but rather a subspecies, which is characterized by the use of thin-film-transistors (TFT) as a semiconductor for each subpixel. The size of such a transistor ranges from 0.1 to 0.01 microns, making it possible to create small, high-resolution displays. All modern compact displays have such transistors, and not only in LCD, but also in AMOLED.

LCD advantages:

  • inexpensive production;
  • slight negative effect on the eyes.

Disadvantages of LCD:

  • uneconomical energy distribution;
  • "Luminous" black color.

OLED

Organic light-emitting diode, or organic light-emitting diode - roughly speaking, it is a semiconductor that emits light in the visible spectrum, if it receives a quantum of energy. It has two organic layers, enclosed in the cathode and the anode: when exposed to an electric current, emission occurs in them and, as a result, light is emitted.

Smartphone screen types: an end to the confusion

An OLED matrix consists of many such diodes. In most cases, they are red, green and blue and together make up a pixel (we will omit the subtleties of various combinations of subpixels). But simpler displays can be monochrome and based on diodes of the same color (for example, in smart bracelets).

Smartphone screen types: an end to the confusion

However, "lights" alone are not enough - a controller is required to display information correctly. And for a long time, the lack of adequate controllers did not allow the production of LED displays in their current form, since it is extremely difficult to correctly control such an array of individual miniature elements.

PMOLED . For this reason, in the first OLED displays, diodes were driven by groups. The controller in PMOLED is the so-called passive matrix (PM). It sends signals to the horizontal and vertical row of diodes, and the point of their intersection is highlighted. Only one pixel can be calculated per clock cycle, so it is impossible to get a complex picture, and even in high resolution. Because of this, manufacturers are also limited in the size of the display: a high-quality image will not come out on a screen with a diagonal of more than three inches.

AMOLED . A breakthrough in the LED display market occurred when it became possible to use thin-film transistors and capacitors to control each pixel (more precisely, a sub-pixel) individually, and not in a group. In such a system, called an active matrix (AM), one transistor is responsible for the beginning and end of the signal transmission to the capacitor, and the other for the transmission of the signal from the diode to the screen. Accordingly, if there is no signal, the diode does not light up, and the output is the deepest black color possible, because there is no glow in principle. Due to the fact that the diodes themselves, which lie almost on the surface, glow, the viewing angles of the AMOLED matrix are maximum. But when deviating from the gaze axis, the color can be distorted - go into a red, blue or green tint, or even go in RGB waves.

Such displays are distinguished by high brightness and picture contrast. Previously, this was a real problem: the first AMOLED-screens were almost always "wry-eyed", they could get tired and hurt the eyes. Some displays used pulse width modulation (PWM) to prevent dark images from fading to purple, which also proved painful to the eyes. Due to the organic origin, the diodes sometimes burned out in two to three years, especially with prolonged display of an unchanged picture.

Smartphone screen types: an end to the confusion

An example of AMOLED display burnout

However, today technologies have gone far ahead, and the listed problems have for the most part already been resolved. AMOLED displays are capable of producing natural colors without heavy eye strain, while IPS displays, on the contrary, tightened up in the area of ​​richness and contrast. In terms of energy consumption, AMOLED technology was initially about one and a half times more efficient than LCD, but according to tests of various devices, we can say that today this figure has almost leveled off.

Smartphone screen types: an end to the confusion

Even five years ago, the difference was no longer as high as in the late 2000s.

Nevertheless, AMOLED is undeniably gaining in popularity in the areas that are gaining popularity. We are talking about frameless gadgets, where LEDs are much easier to place than side-backlit liquid crystals, and curved (and, in the future, bending) displays, for which LCD technology is unsuitable in principle. But this is where a new type of OLED comes into play.

P-OLED . In fact, there is some trickery in separating these displays into a separate category. Indeed, in fact, the fundamental difference between P-OLED (or POLED, not to be confused with PMOLED) from AMOLED is one thing - the use of a plastic (plastic, P) substrate, which allows the display to bend, instead of glass. But it is more difficult and more expensive to manufacture than standard glass. By the way, AMOLED displays are much thinner than LCD due to the smaller number of "layers", and P-OLED, in turn, is thinner than AMOLED.

Smartphone screen types: an end to the confusion

All smartphones with a curved display (mainly Samsung and LG) use P-OLED. Even in the flagships of Samsung in 2017, where, according to the manufacturer, there is both Super AMOLED and Infinity Display at once. The fact is that these are marketing names that have practically nothing to do with actual production technologies. From this point of view, OLED displays are installed there, which are controlled by an active matrix of thin-film transistors and lie on a plastic substrate - that is, the same AMOLED, or P-OLED. By the way, although the display in LG V30 does not bend, it still lies on a plastic substrate.

OLED advantages:

  • high contrast and brightness;
  • deep and not energy-consuming black color;
  • the ability to use in new form factors.

Disadvantages of OLED:

  • strong effect on the eyes;
  • expensive and complex production.

Marketing moves

Retina and Super Retina . Translated from English, this word means "retina", and Steve Jobs chose him for a reason. During the presentation of the iPhone 4 in 2010, he said that the human eye is not able to distinguish between pixels if the display ppi exceeds 300. Strictly speaking, any corresponding display can be called Retina, but for obvious reasons no one except Apple uses this term. The display of the future iPhone X has been called Super Retina, although it will have an AMOLED display, and not IPS, as in the rest of the company's smartphones. In other words, the name also has nothing to do with the screen manufacturing technology.

Super AMOLED . This trademark belongs to Samsung, which produces displays both for itself and for competitors, including Apple. Initially, the main difference between Super AMOLED and just AMOLED was that the company removed the air gap between the matrix and the touch layer of the screen, that is, combined them into a single display element. As a result, when deviating from the gaze axis, the picture ceased to delaminate. Very soon the technology reached almost all smartphones, and today it is not entirely clear why "super" is better than "regular" AMOLEDs produced by the same company.

Infinity Display . Everything is quite simple here: "infinite display" means just an almost complete absence of side frames and the presence of minimal frames at the top and bottom. On the other hand, you can't imagine some ordinary frameless smartphone at the presentation - you have to name it beautifully.

Advanced technologies

Micro-LED or ILED . This technology is a logical alternative to OLEDs: it is based on inorganic (Inorganic, I) gallium nitride of a very small size. According to the assessment of experts, micro-LED will be able to compete with the usual OLED in all key parameters: the higher the contrast, the best stock of brightness, faster response time, durability, smaller size and lower power consumption in half. But, alas, such diodes are very difficult to mass produce, so the technology will not yet be able to compete with conventional solutions on the market.

However, this did not stop Sony from showing a 55-inch TV with a matrix of inorganic LEDs at CES-2012. Apple bought LuxVue, a research and development company in this area , in 2014 . And although the iPhone X uses classic AMOLED, future models may already have micro-LED matrices, which, we are assured , will increase the pixel density to 1500 ppi.

Smartphone screen types: an end to the confusion

A prototype Sony micro-LED TV called Crystal LED

Quantum Dots, or QD-LED, or QLED... This promising technology has taken a bit of everything from those already on the market. She got an internal backlight from LCD displays, but it does not "hit" into liquid crystals, but into very small crystals with a glow effect, deposited directly on the screen - quantum particles. The size of each dot depends on what color it will shine, the range is from two to six nanometers (for comparison: the thickness of a human hair is 100,000 nanometers). The result is vibrant, rich yet natural colors. TVs with such displays were first released by Sony in 2013. There are several models from Samsung on the market now. The quantum dots in them are used in the illumination layer. So far, this is a very expensive technology to manufacture: the average cost of QLED TVs is about $ 2500-3000.

Smartphone screen types: an end to the confusion

Quantum dots are produced as a microscopic powder and then sprayed onto a screen

conclusions

In practice, modern LCD and AMOLED displays are becoming less and less different from each other in image quality and energy efficiency. But the future belongs to LED technologies in one form or another. Liquid crystals have already outlived their time and are kept on the market only due to their cheapness and ease of production, although high image quality is also present. Due to their structure, LCD displays are thicker than LED ones and are unpromising in terms of new curvature and bezelless trends. So their withdrawal from the market is already on the horizon, while LED technologies are confidently developing in several directions at once and, as they say, are waiting in the wings.

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TFT LCD Display Modules by jwslcd

TFT LCD Display Modules by Jwslcd

Long gone are the days when the whole variety of monitors was limited to cathode ray tubes. Users can choose monitors that render images using a wide variety of technologies. They make it possible to create both universal and highly specialized models. This article will focus on the technology, without which it is impossible to display an image in any of the monitors produced today. This is a TFT display.

Working principle of TFT LCD display

TFT LCD display

Before diving into the intricacies of a TFT screen, we note that displays are composed of two main technologies. The first is the LCD, and the second is the matrix itself. The two elements are connected together, performing a common function - displaying an image. The two values ​​should not be related to one another. So, a TFT matrix can have any kind of backlight - LCD, LED and their variations. Likewise, one kind of backlight can be combined with different matrices. Both the backlight and the matrix have their own list of technical characteristics for which they are responsible. However, the main parameter in determining the purpose of the monitor is precisely the matrix.

In order not to confuse LCD with TFT, let's decipher what each abbreviation means. In addition, it will be useful to understand how these technologies work.

What is LCD

LCD is a technology for manufacturing monitors, familiar to us by the abbreviation LCD (liquid crystal). Liquid crystals are a special substance that can change their properties when exposed to electricity. More precisely, the changes in them are caused by electromagnetic waves. The type of this surface affects the quality of the backlight and other functions. Screens are called liquid crystal screens, because in the switched on state the substance exhibits the properties of crystals (in terms of affecting the image).

What is TFT display

The second part of the monitor is a matrix. In our case, we are talking about TFT. The name stands for Thin Film Transistor. The matrix consists of thin film transistors. Its applicability is wide - calculators, arduino displays, old and not so phones, as well as monitors for laptops and PCs.

At the time when LCD monitors were just starting to go on sale, they were equipped with so-called passive matrices. These elements were quite sluggish, since the voltage had to change on it to change the pixel value. Due to the physical characteristics of the pixels, this was slow. Consequently, those monitors had low refresh rates and were often annoying with a flickering screen.

All monitors now produced are equipped with active matrices. A special transistor is responsible for the value of the cells, which stores the value in binary code (0/1). This allows the pixel values ​​to be retained until the signal changes. This approach increased the screen refresh rate and eliminated flickering. The new active matrices are called TFT.

Types of TFT matrices

Types of TFT matrices

If you look at it, it turns out that the type of TFT matrix is ​​found in absolutely all liquid crystal monitors. As explained earlier, the technology is based on thin film transistors. This technology is considered the most advanced, and no affordable alternative has been found. The scheme of operation of such a mechanism is as follows.

In modern monitors, color is built according to the RGB scheme. This means that every single pixel can display red, green, or blue. And already from these basic colors all the rest are made up. It turns out that there are color cells in each pixel. There are three of them, and each has its own transistor connected, which tells which colors should be displayed at the moment. Such a scheme is understandable, but difficult to manufacture, especially considering how delicate these schemes are. Therefore, high-quality matrices cost a lot of money.

When the variety of technologies was not so great, monitors were called TFT. However, the type of TFT screen does not reveal all the technical characteristics embedded in it. Therefore, over time, such a signature was abandoned. Now there are three main subtypes of the matrix, each of which has its own distinctive features. They will be discussed in the following subsections.

The first in the list will be considered a TFT matrix called TN. It has retained the basic features of the first thin-film designs. Most often, such matrices are inexpensive to create, and therefore are on many budget monitors. Their native element is offices, home PCs, etc., as well as game models. Why this is so will become clear when we understand the main distinguishing features of TN.

The main advantage of TN technology is the low response time of the monitor. This is an indicator that characterizes the ability of a pixel to quickly change its glow. At TN, this figure is at a height due to the design features. Low response is very good for gamers. This allows them to instantly react to the slightest changes in the gameplay, as well as to increase the smoothness of the picture (this will reduce fatigue).

However, TN also has a "proprietary" minus - viewing angles. This flaw is most noticeable on laptops. The slightest change in the angle of view is enough for the colors to change their brightness beyond recognition. Of course, such a screen is not suitable for designers, artists and other professionals. However, the TN + Film type deserves the attention of professional gamers and moviegoers, since in it this parameter is brought to a more or less decent state.

The second type that we will consider is the IPS matrix. It can be considered the opposite of TN. Distinctive features are the saturation and accuracy of color reproduction, which do not change at all with a change in the angle of view. At the same time, this was achieved at the cost of reducing the response time. However, this parameter can be compensated for by the increased screen refresh rate. In addition, this parameter can be improved in some game models. However, the cost of IPS matrices is quite high, and this can also be considered one of the disadvantages.

The IPS matrix is ​​best suited for professionals working with color, images and 3D models. It is for such users that color rendition is most important. In combination with Super LCD backlight, such a tool can become a serious help in work. However, gamers will also be interested in devices in which the monitor's response has been accelerated.

Which is better Super LCD or TFT

When trying to choose a TFT display, you can resort to the comparison method. It is good when you need to choose one model from several similar ones, or understand which technology is suitable for a specific situation. Comparative tendencies, however, can be a trap. It's like comparing Windows to Linux. They have different areas of success, and what is good for one user will be superfluous for another. Therefore, before resorting to the comparison tool, you need to make sure that it will be appropriate. Otherwise, the comparison will be a waste of time.

An attempt to find out which is better - LCD or TFT just from this area. Those who carefully read the previous sections realized that LCD backlight and TFT display are not competitors, but two components that are inseparably symbiotic. One technology without the other would be useless, turning the monitor into a piece of plastic.

As for Super LCD, this is the unofficial name for a screen equipped with a high-quality LCD backlight and an IPS matrix. This name stuck due to the fact that the selected combination of technologies provides a bright image with correct color reproduction. If you choose between IPS (Super LCD) and TFT (its classic variation, TN), then the first option will be more technologically advanced.

Which type of matrix is ​​right for you

To choose a suitable TFT display, you first need to decide on the tasks that the PC user will have to solve. Using knowledge about the characteristic advantages of a particular technology, you can choose the type of TFT matrix that will be optimal in terms of price-quality ratio and technical characteristics.

For gamers, the following types are preferable: budget - TN TFT display, or IPS gaming modifications. Photographers, designers and architects need a flagship IPS. And for moviegoers and home PC owners, IPS or PLS are not required, although they remain the leaders in terms of color. In this case, you can choose VA or MVA matrices.

So, the TFT display is the basis for all monitors produced. The versatility of the technology allows it to be used in devices of various classes. Until science has made a new breakthrough, the TFT display will remain the uncontested production option.

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What is TFT LCD Screen

What is TFT LCD Screen

 

TFT LCD (Thin Film Transistor Liquid Crystal Display) is the abbreviation of Thin Film Transistor Liquid Crystal Display. The cross section of the TFT panel is shown in Figure 1.

The structure of LCD is introduced. Polarizer.

The top polarizer can polarize stray light from random polarization in a given polarization direction. Before applying an electric field to the electrodes, the liquid crystals are arranged in a twisted structure. The light in this case changes according to the twisted structure of the liquid crystal. The lower polarizer is oriented perpendicular to the upper polarizer. When the light reaches the bottom polarizer, the two polarizers are aligned with each other. Light can pass through them unhindered, as shown in Figure 2

LCD structure introduction

Glass substrate, TFT substrate, color film substrate

Using high-precision photolithography, the pattern is applied to the glass substrate to gradually transfer the images of multiple LCD electrodes in sequence (Figure 3). TFT glass has as many transistors as there are pixels on the display, and color generation is provided by color filter glass with color filters. The movement of the liquid crystal is caused by the potential difference between the electrodes on the TFT glass and the color filter glass. It is this movement of the liquid crystal that produces the color and determines the brightness of the LCD.

LCD liquid crystal

Liquid crystals are almost transparent substances and exhibit the characteristics of crystals and liquids at the same time. Two glass plates sealed with epoxy resin and with a groove in the left corner allow the introduction of liquid crystals (under vacuum) before the final sealing of the glass plates. The potential difference determines the orientation of the liquid crystal. When polarizers and color filters are used, the difference in the orientation of the liquid crystal causes the difference in transmittance (or reflectance) and the resulting color. Liquid crystals are substances that present different phases (solid, liquid crystal or liquid) at different temperatures

Leveling film

The film is deposited on two glass plates (upper and lower), with a series of parallel grooves, so that the liquid crystal molecules are aligned in the appropriate direction (Figure 5 has a series of parallel grooves, so that the liquid crystal molecules are aligned in the corresponding direction)

LCD development

Liquid crystal was discovered more than 100 years ago. When heated, their external state can change from solid to liquid crystal, and even completely transform into liquid form as the temperature rises further. Over the years, people have made great efforts to improve liquid crystals, and as a result they have been widely used in electronic calculators and digital clocks. At present, the application range of color liquid crystal is wider: mobile phones, personal computers and TVs, which have the characteristics of low thickness, low power consumption, high resolution and brightness. In addition, in the foreseeable future, driven by the rapid spread of flat panel displays, the demand for LCD panels is expected to grow substantially.

How does LCD work

When a voltage is applied to the two LCD electrodes, the stronger the "unfolding" of the liquid crystal molecules, the higher the applied potential (Figure 6). Voltage sensitivity is one of the main characteristics of liquid crystals. Figure 7 shows the normal "white" mode of the LCD. As long as no potential difference is applied, light can pass through the liquid crystal layer, and the liquid crystal molecules will change the orientation of the light plane according to their own angle. However, when a voltage is applied, the liquid crystal molecules will "unfold" and "straighten" the light directed to the upper polarizing filter. Therefore, light will not be able to pass through the active area of the LCD, and this area will be darker than the surrounding area.

LCD control mode

Figure 8 shows the LCD control circuit. In a selected period of time, the switch is closed and an input voltage is applied to the liquid crystal, which will cause the orientation of the liquid crystal molecules to change. When the switch is closed, a certain charge is stored in Clc, and the voltage across Clc decreases with time. Consider adding a storage capacitor Cst in parallel with Clc to expand the storage capacity of the charge.

Energy storage capacitor

In fact, the control of the liquid crystal must be carried out by AC voltage. To activate the LCD, voltage is applied only when the switch is turned on, and then the switch is turned off immediately. In some cases, the voltage across the liquid crystal drops due to leakage. To prevent this, we can use a parallel capacitor to compensate for the leakage voltage. As the capacitance Cst increases, the shape of the voltage across it is close to a zigzag

The working principle of TFT LCD

The TFT acts as a switch. The gate of the TFT is connected to the scan line, the source is connected to the data line, and the drain is connected to Clc and Cst. When the shutter is activated (selected on the scan line), the TFT channel is opened, and the image data will be written into Clc and Cst. When the shutter is not selected, the TFT channel is closed

The basic structure of TFT LCD

The core of TFT-LCD structure includes liquid crystal, two polarizers and glass plate: upper color film substrate and lower TFT array substrate. Inject liquid crystal material between the two glass plates

Luminous flux adjustment

By controlling the magnitude of the input voltage applied to the liquid crystal, the arrangement, orientation and direction of the molecules can be changed, which will cause the volume of the luminous flux through the liquid crystal to change accordingly

Color formation

When the light flux passes through the color filter integrated in the top colored glass, each pixel of the image is formed by mixing basic RGB color elements (R-red, G-green, and B-cyan). If the red, green, and blue pixel elements are selected in equal proportions, white light will be produced. By adjusting the ratio of these three elements, the required number of different colors is obtained