transmissive tft display factory

Orient Display sunlight readable TFT displays can be categorized into high brightness TFT displays, high contrast IPS displays, transflective TFT displays, Blanview TFT displays etc.

The brightness of our standard high brightness TFT displays can be from 700 to 1000 nits. With proper adding brightness enhancement film (BEF) and double brightness enhancement film (DBEF) and adjustment of the LED chips, Orient Display high brightness TFT products can achieve 1,500 to 2,000 nits or even higher luminance. Orient Display have special thermal management design to reduce the heat release and largely extend LED life time and reduce energy consumption.

Our high contrast and wide viewing angle IPS displays can achieve contrast ratio higher than 1000:1 which can make readability under strong sunlight with lower backlight luminance. High brightness IPS displays have been widely accepted by our customers with its superb display quality and it has become one of the best sellers in all our display category.Transflective display is an old monochrome display technology but it has been utilized in our color TFT line for sunlight readable application. Orient Display has 2.4” and 3.5” to choose from.

Blanview TFT displays are the new technology developed by Ortustech in Japan. It can provide around 40% of energy consumption for TFT panels which can use smaller rechargeable or disposable batteries and generate less heat. The price is also lower than traditional transflective TFT displays. Orient Display is partnering with the technology inventor to provide 4.3” and 5.0”.

Orient Display can also provide full customized or part customized solutions for our customers to enhance the viewing experience. Orient Display can provide all the different kinds of surface treatments, such as AR (Anti-reflection); AG (Anti-glare), AF (Anti-finger print or Anti-smudge); AS (Anti-smashing); AM (Anti-microbial) etc. Orient Display can also provide both dry bonding (OCA, Optical Clear Adhesive), or wet bonding (OCR, Optical Clear Resin and OCG, Optical Clear Glue) to get rid of light reflective in air bonding products to make the products much more readable under sunlight and be more robust.

Touch panels have been a much better human machine interface which become widely popular. Orient Display has been investing heavy for capacitive touch screen sensor manufacturing capacity. Now, Orient Display factory is No.1 in the world for automotive capacitive touch screen which took around 18% market share in the world automotive market.

Based on the above three types of touch panel technology, Orient Display can also add different kinds of features like different material glove touch, water environment touch, salt water environment touch, hover touch, 3D (force) touch, haptic touch etc. Orient Display can also provide from very low cost fixed area button touch, single (one) finger touch, double finger (one finger+ one gesture) touch, 5 finger touch, 10 points touch or even 16 points touch.

Considering the different shapes of the touch surface requirements, Orient Display can produce different shapes of 2D touch panel (rectangle, round, octagon etc.), or 2.5D touch screen (round edge and flat surface) or 3D (totally curved surface) touch panel.

Considering different strength requirements, Orient Display can provide low cost chemical tampered soda-lime glass, Asahi (AGC) Dragontrail glass and Corning high end Gorilla glass. With different thickness requirement, Orient Display can provide the thinnest 0.5mm OGS touch panel, to thickness more than 10mm tempered glass to prevent vandalizing, or different kinds of plastic touch panel to provide glass piece free (fear) or flexible substrates need.

Of course, Orient Display can also offer traditional RTP (Resistive Touch Panel) of 4-wire, 5-wire, 8-wire through our partners, which Orient Display can do integration to resistive touch screen displays.

Engineers are always looking for lower cost, faster, more convenient interfaces to transmit signals and to accept data and commands. The numbers of available interfaces available in the market can be dazzling. Orient Display follows market trends to produce various kind of interfaces for our customers to choose.

Genetic Interfaces: Those are the interfaces which display or touch controller manufacturers provide, including parallel, MCU, SPI(,Serial Peripheral Interface), I2C, RGB (Red Green Blue), MIPI (Mobile Industry Processor Interface), LVDS (Low-Voltage Differential Signaling), eDP ( Embedded DisplayPort) etc. Orient Display has technologies to make the above interface exchangeable.

High Level Interfaces: Orient Display has technologies to make more advanced interfaces which are more convenient to non-display engineers, such as RS232, RS485, USB, VGA, HDMI etc. more information can be found in our serious products. TFT modules, Arduino TFT display, Raspberry Pi TFT display, Control Board.

Our new line of 10.1” TFT displays with IPS technology are now available! These 10.1” IPS displays offer three interface options to choose from including RGB, LVDS, and HDMI interface, each with two touchscreen options as capacitive or without a touchscreen.

The new line of 3.5” TFT displays with IPS technology is now available! Three touchscreen options are available: capacitive, resistive, or without a touchscreen.

7. We combine touch screen technology with LCD display module, which greatly saves your cost. Perfect after-sales service will be one of the reasons why you choose us.

Huaersheng invested 160 mu display industrial park in 2022,which has the floorage of 12000 square matres. Park planning: 2 panel production lines of 370mm*470mm, 6full-automatic AMOLED production lines,30 COG full-automatic AMOLED production lines.

Super Mobile HR TFT LCDs provide brilliant, vivid images outdoors where it is bright, but their visibility is poor indoors, where ambient light levels are lower.

Thus, though the display panel is transflective, it provides high transmittance and excellent image quality on a par with conventional transmissive TFT-LCDs.

The High Transmission Advanced TFT-LCD is suitable for applications where indoor use is of primary importance but outdoor use is occasionally necessary.

For many years now, transmissive TFT displays have been the dominating technology in visualization. With more and more screens being used outdoors and in portable applications, sunlight readability has become a critical factor in the display market. One way many LCD manufacturers address this issue is to increase the display’s backlight luminance. Although this works well for many applications, it also increases the power consumption and bulkiness of the display making it a non-ideal solution for some portable or small-size applications.

As an alternative to high-brightness TFTs, New Vision Display offers transflective TFT solutions which offer readability in any lighting condition without increasing power consumption or bulkiness. However, the more complex structure of transflective displays increases the manufacturing costs.

Simple, low-resolution LCDs routinely are offered in reflective, transmissive, and transflective (partially transmissive and partially reflective) modes. This is achieved simply by choice of the reflector behind the display, which is usually attached to the rear polarizer. This method is not feasible for TFT displays due to the inherently much lower transmission of these devices.

Transflective TFT displays have a unique cell architecture compared to standard TFT display modules. This is necessary to accommodate for the fact that, in transmissive mode, light passes only once through the liquid crystal layer before reaching an analyzer, while in reflective mode it passes the liquid crystal layer twice.

In the transflective cell architecture, every single pixel is divided into a transmissive and a reflective section. The reflective sections are based on a polymer film with micro-metal mirrors within the glass cell. The size and partition of both transmissive and reflective sections are flexible and depend on the desired focus of the final display. Typically, the liquid crystal layer thickness in the reflective part is only half of the cell gap in the transmissive part. The front polarizer acts as both polarizer and analyzer for the reflective portion of each pixel. This requires selection of a liquid crystal mode that works with parallel polarizers, unlike transmissive displays where the polarizer and analyzer are usually crossed. Furthermore, in order to achieve satisfactory picture performance in reflective mode, the front surface reflection must be suppressed, which is achieved by coating an anti-reflective or an anti-glare layer on the front polarizer.

Within transflective LCDs, transmissive and reflective modes work together for enhanced performance:In dimly lit environments, the display’s transmissive modeis dominant: Light emitted from the display’s backlight illuminates the display image for the viewer (see Image 2 below).

In bright environments, such as direct sunlight, the display’s reflective mode is more dominant: The display image is illuminated via bright ambient light reflected off the internal mirror structure, rather than emitted light from the module’s backlight (see Image 3 below).

The contrast ratio in reflective mode is still 30:1 versus 300:1 in transmissive mode. Color gamut is specified with 60% coverage of the NTSC triangle and the liquid crystal’s response time is 30ms from black to black.

Transflective TFT display modules can be manufactured in a wide range of sizes and for diverse applications. NVD focuses its efforts in transflective displays on portable applications, currently up to 4.3 inches with resolutions in the 230ppi range. Other sizes are available as custom designs.

Call one of our LCD experts to discuss your project, or complete the below contact form and we’ll put you in touch with the right representative. We look forward to helping you choose the right display solution for your application.

For many years, TFT displays have been the dominating technology in visualization. TFT LCDs are all around in our daily lives — in consumer and automotive applications, in our business environments, in healthcare, and within communication devices, home appliances, and factory automation products. While there are many LCD products available today, they’re not all suitable for every application. This is especially the case for industrial LCD monitors. To determine the best LCD display for your application, it’s important to understand your target market and its unique design issues.

The vast majority of LCD displays are designed for consumer devices such as smartphones, cameras, tablet computers, and gaming devices. But they have very different requirements than those for industrial applications. Due to very competitive pricing and quick production cycles, consumer display modules don’t always incorporate the durability, reliability, and advanced features required to survive in an industrial environment. Product life cycles are also typically much shorter in consumer applications. Screens manufactured for these applications are generally only available for one, in best case two years.

In contrast, display modules for industrial applications require Long product life cycles— often up to ten years or more. Plus, when an industrial module is discontinued by the manufacturer, a successor product should be backward-compatible so as to fit into the existing enclosure without requiring a redesign of the entire system.

The ability to withstand temperature variations as well as shock and vibration is also a key consideration when selecting displays for today’s industrial applications. They must be resilient enough to withstand frequent bumps or jiggles by machine operators and surrounding equipment, and also must be able to handle various operating temperatures.

Industrial displays are typically housed in an enclosure as part of a larger piece of equipment. In these situations, the heat generated by the surrounding equipment gets trapped within the enclosure, which can be detrimental to many displays. Therefore, it’s important to keep the real storage and operating temperature requirements in mind when choosing a display. While measures can be taken to dissipate the generated heat — such as using fans within the enclosure — the most efficient way to ensure compliance with the storage and operating temperature requirements is to select a display that is optimized for these types of environments. Fortunately, improvements in liquid-crystal materials have made it possible to extend the operating temperature ranges of LCDs from –30 to 80°C presently.

It’s important that displays used in industrial applications support clear and precise viewing from multiple angles under a variety of ambient light conditions. The brighter the environment, the more difficult it can be to read a standard transmissive LCD display with a typical brightness of 250 to 300 cd/m2. NVD has developed displays that can perform in the 800-cd/m2-and-higher range by implementing high-efficiency LEDs for the backlight unit– if necessary, in combination with special brightness enhancement films.

Increasing the display’s contrast ratio is another effective way that display manufacturers can improve display readability in bright environments. Typical contrast ratios for non-industrial displays are in the range of 200:1 to 300:1, which may not be sufficient when a machine operator is viewing the display from a distance. Displays with contrast ratios around 500:1 or greater are better suited for industrial environments. Another benefit of this method is that it doesn’t increase power consumption.

Transflective LCDs are a good solution for environments with variable lighting. Having both transmissive and reflective characteristics, transflective LCDs have the option of using a backlight in dim lighting (transmissive mode), as well as using reflective properties in bright lighting (reflective mode). This reduces power consumption and heat production in reflective mode since the backlight isn’t used.

Multi-angle readability is another key selection factor. In a typical industrial environment, a machine operator is more likely to be positioned at an off-angle rather than right in front of the screen. Implementing a display designed for consumer applications typically doesn’t work well in this situation, as there is image distortion and color shifting when viewed at an angle. But, a number of technologies have been employed to improve off-angle viewing in displays, making them suitable for industrial applications. Some film-based technologies yield viewing angles of 160º horizontally and 140º vertically, but in some cases, this is still not sufficient. In-plane switching technology (IPS), multi-domain vertical alignment (MVA), and fringe field switching (FFS)offer alternatives. These proprietary technologies are able to achieve viewing angles of almost 90-degrees into all four directions without any color shift.

Size and resolution also play a role in overall readability. Displays between 2 and 15-inch diagonal sizes are used most often in industrial applications. These sizes provide sufficient area to view figures, waveforms, and other graphical data without taking up too much real estate on a piece of equipment.

From an aspect ratio 4:3 initially, industrial displays are now shifting to wide formats with WVGA to WXGA resolutions. The wide-aspect format enables users to view longer waveforms and more data on a single display. These display modules can also be designed to incorporate touch-key functions, allowing equipment manufacturers to skip physical switches and buttons and design HMIs based more on software than hardware.

New Vision Display’s experts are prepared to assist in defining appropriate solutions for all applications and in helping find the right balance between manufacturing cost and performance.

The DT010TFT is a 1 inch TFT LCD module with 80 x 160 RGB resolution. This small LCD screen uses a 4-wire Serial Protocol Interface (SPI) to communicate with the driver IC (Ilitek ILI9163) and has a 6 o"clock viewing angle. The single chip driver IC for this transmissive TFT LCD provides a full color display mode of 262K colors. This TFT LCD is ideal to be used as an indicator or to display simple icons and information. The 1" LCD module includes a color TFT-LCD panel, a driver IC, FPC, and a white LED backlight unit.

Winstar is a global leading Manufacturer of TFT LCD display based in Taiwan and China.  Winstar offers a wide product range of small to medium sizes TFT display modules in sizes ranging such as 2.4″ TFT LCD, 2.8″ TFT LCD, 3.2″ TFT LCD, 3.5″ TFT Display, 4.3 inch TFT LCD, 5 TFT LCD, 5.6 TFT LCD, 5.7 inch Display,  7 ” TFT LCD, 8″ TFT, 9″ TFT, 10.1″ TFT LCD, 10.2″ TFT LCD, 12.1″ TFT LCD , 12.3″ TFT LCD (diagonal size of the active area) and so on .  There are more than 200 TFT standard models listed on this website; furthermore, almost each item is acceptable to derivate from the standard items to meet the customers’ requirement.Winstar TFT displays are qualified under industrial standard including standard TFT-LCD modules, IPS TFT, High brightness TFT LCD (sunlight readable display), TFT panels with controller boards, Bar Type TFT, Wide Temperature TFT LCD, Winstar Clever System TFT and Touch screen display.  These displays include landscape or portrait modes.  Winstar has Mono TFT displays and full color TFTs in line, these displays are available in various resolutions as well as touch screen optional in resistive and projected capacitive (PCAP touch screen) technology.  Many of our TFT display modules have more than one interface available including MCU, RGB, TTL, LVDS and MIPI DSI.  Winstar TFT modules are perfect for a number of applications including industrial control, coffee machine, medical equipment, POS system, automation, GPS navigator, white goods, energy control, telecoms, medical equipment and etc.

“Blanview” is Toppan’s unique TFT-LCD technology enabling the display to create high contrast and crisp images even in bright circumstances where a sunlight hit to display surface directly.

With leveraging Toppan’s high-quality amorphous silicon (a-Si) technology “HAST” (Hyper Amorphous Silicon TFT), which has been fostered in our 40-years-long display expertise, Toppan succeeded in generating new type TFT-LCD with a good balance between 2 values - “Sunlight Readable” and “Low Power Consumption”

Transmissive-typeis the most common LCD technology that is widely used in many electrical devices. Transmissive can provide clear images in indoor and dark situations, but meanwhile its display readability gets worse in bright outdoor situations. Backlight power increase can improve the display visibility somewhat, but it lead to boost total power consumption; this may be critical impact to battery-driven handheld devices.

Transflective-typeis suitable LCD technology to outdoor applications. Transflective has pixels divided into 2 areas, Transmission and Reflection area; the reflection area (reflective electrode) takes a role to reflect incident light from outside. This can give a clear display readability as well as low power consumption; however, the panel transmittance (backlight efficiency) becomes rather lower due to a 2-divided pixel structure. As a result, Transflective inherently has a drawback of large power consumption in indoor or dark conditions. Complex pixel structure furthermore cause a problem that a color level changes indoors and outdoors; generally white color tends to gain yellowish outdoors.

The above shows how each display technology (Transmissive, Transflective and Blanview) handles the light to create images. Line weight of each arrow indicates its light intensity level.

Transmissive with high light transmittance can utilize backlight efficiently for good display quality; on the other hand, it has little functionality to make use of incident light from outside. Transmissive eventually is not possible to secure good display visibility in outdoor bright situations, unless increasing backlight (= power consumption increase).

This unique technology enables us to take a “hybrid use” of backlight and incident light from outside. Blanview succeeded in not only ensuring superior display readability in any situations, but also decreasing total power consumption.

This chart shows backlight power consumption required to secure enough display readability with transmissive LCD, transflective LCD and Blanview LCD respectively.

Transmissive requires lots of power in bright circumstances. Transflective is possible to reduce the power greatly in bright circumstances, but meanwhile it requires more power to secure enough readability in dark circumstances.

Blanview can acquire high display visibility along with low power consumption in any circumstances, from dark to bright circumstances. We can say that Blanview is most suitable display technology to a product used in “sometimes outdoor, sometimes indoor” for a long period.

In order to providing more suitable display product for customer’s new product development, Toppan’s Blanview family covers a wide variety of standard (off-the-shelf) products; e.g. Display size, Resolution, Interface, Characteristics, Additional functions.

Blanview TFT-LCD is most appropriate display to electronic equipment, facilities and devices which may be used in “sometimes outdoor, sometimes indoor”. Low-Power-Consumption advantage will extend a battery life of handheld devices.

TFT Glass has as many TFTs as the number of pixels displayed, while a Color Filter Glass has a color filter that generates color. Liquid crystals move according to the difference in voltage between the Color Filter Glass and the TFT glass. The amount of light supplied by Back Light is determined by the amount of movement of the liquid crystals in such a way as to generate a color.

Medical devices should have high contrast, high resolution, wide viewing angles, and high-quality LCD screen image displays. LCD screens will also be required to have higher brightness when used in operating rooms, emergency rooms, ICUs, and other environments that use high-brightness lighting. A newer design trend is the use of low-voltage differential signal transmission LCD modules to ensure minimal electromagnetic interference to the equipment. The industrial control screens used in medicine are generally those of Mitsubishi and AUO. Industrial control panel stability, high parameters, is the best choice for medical equipment.

LCD provides a powerful information management platform for security monitoring. Through the integration of case high incidence areas, key protection units, police road information, monitoring information, police force configuration information, electronic maps, police identification symbols, etc., can achieve full-screen view, multi-screen browsing, touch head operation, and other functions can realize personnel, vehicles and other police resources simulation deployment. This display is also commonly used in industrial LCD screens, stable, high parameters, but in the military screen is usually equipped with a touch screen, do a full paste, to help explosion-proof, brighten.

· Excellent Colour Display.Top-notch color contrast, clarity, and brightness settings that can be adjusted to accommodate specific application requirements.

· Extended Half-Life.TFT displays boast a much higher half-life than their LED counterparts and they also come in a variety of size configurations that can impact the device’s half-life depending on usage and other factors.

· TFT displays can have either resistive or capacitive touch panels.Resistive is usually the standard because it comes at a lower price point, but you can also opt for capacitive which is compatible with most modern smartphones and other devices.

· TFT displays offer exceptional aspect ratio control.Aspect ratio control contributes to better image clarity and quality by mapping out the number of pixels that are in the source image compared to the resolution pixels on the screen.

· Monitor ghosting doesn’t occur on TFT displays.This is when a moving image or object has blurry pixels following it across the screen, resembling a ghost.

· TFT displays are incredibly versatile.They offer a number of different interface options that are compatible with various devices and accommodate the technical capabilities of all users.

In an era where many “manufacturers” simply resell touch screens from low-cost suppliers or outsource manufacturing to third parties, Reshine is a true Capacitive touch&Resistive touch display OEM manufacturer with 12 years of experience. Reshine Display (HK) Technology Co., Limited is a branch of Shenzhen Ruixiang Digital Technology Co., Ltd., which is a high-tech enterprise established in 2007, located in Longhua District, Shenzhen.

We are a leading designer and manufacturer of touch screens, and we have rich experiences in medical & industrial & home automation& products supply.Reshine"s mission is to be the most successful touch screen display supplier in the markets it serves.

The company has a total construction area of 4,000 square meters, with a monthly production capacity of 500,000 pieces, a production staff of 150-200 people, 5 R&D engineers, and 15 quality control personnel with 5-10 years of experience in the touch screen industry, The factory has introduced brand touch&display production equipment from the United States, Japan, South Korea, Taiwan, and a hundred-level purification workshop to ensure that the screens meet the requirements of production equipment and environment.

TFT Glass has as many TFTs as the number of pixels displayed, while a Color Filter Glass has a color filter that generates color. Liquid crystals move according to the difference in voltage between the Color Filter Glass and the TFT glass. The amount of light supplied by Back Light is determined by the amount of movement of the liquid crystals in such a way as to generate a color.

Excellent Colour Display.Top-notch color contrast, clarity, and brightness settings that can be adjusted to accommodate specific application requirements.

Extended Half-Life.TFT displays boast a much higher half-life than their LED counterparts and they also come in a variety of size configurations that can impact the device’s half-life depending on usage and other factors.

TFT displays can have either resistive or capacitive touch panels.Resistive is usually the standard because it comes at a lower price point, but you can also opt for capacitive which is compatible with most modern smartphones and other devices.

TFT displays offer exceptional aspect ratio control.Aspect ratio control contributes to better image clarity and quality by mapping out the number of pixels that are in the source image compared to the resolution pixels on the screen.

Monitor ghosting doesn’t occur on TFT displays.This is when a moving image or object has blurry pixels following it across the screen, resembling a ghost.

TFT displays are incredibly versatile.They offer a number of different interface options that are compatible with various devices and accommodate the technical capabilities of all users.

In an era where many “manufacturers” simply resell touch screens from low-cost suppliers or outsource manufacturing to third parties, Reshine is a true Capacitive touch&Resistive touch display OEM manufacturer with 12 years of experience. Reshine Display (HK) Technology Co., Limited is a branch of Shenzhen Ruixiang Digital Technology Co., Ltd., which is a high-tech enterprise established in 2007, located in Longhua District, Shenzhen.

We are a leading designer and manufacturer of touch screens, and we have rich experiences in medical & industrial & home automation& products supply.Reshine"s mission is to be the most successful touch screen display supplier in the markets it serves.

The company has a total construction area of 4,000 square meters, with a monthly production capacity of 500,000 pieces, a production staff of 150-200 people, 5 R&D engineers, and 15 quality control personnel with 5-10 years of experience in the touch screen industry, The factory has introduced brand touch&display production equipment from the United States, Japan, South Korea, Taiwan, and a hundred-level purification workshop to ensure that the screens meet the requirements of production equipment and environment.

A quick guide on understanding the different ways to illuminate LCD and TFT displays. Matrix Orbital offers many different display solutions. Need a custom solution? No problem! Since we manufacture our products in-house, we are highly flexible, have low MOQ`s and provide you what you need. From custom headers to custom cables to entire custom displays, we can make what you need.On Shore and In-House DesignIn-House ManufacturingIn-House SalesIn-House SupportIn Calgary, Canada

A reflective display has no backlight, and uses ambient light to self-illuminate. Light passes through the glass and is reflected back out. It is a low-cost display often used in high brightness environments.

Most TFT displays and negative LCD’s are transmissive meaning they always have a backlight. A negative LCD is where the characters are the colour of the backlight. The backlight is used to illuminate the display, If the backlight is off, the display will generally not be readable. The backlight fights against ambient light, so in direct sun, a backlight that is sunlight rated is required or the display will become washed out, the brighter the backlight, the more visible the display will be in direct sunlight.

Transflective LCD’s and TFT’s have both reflective and transmissive characteristics. The display will use ambient light as well as a backlight. A very common example is a yellow/green backlit LCD. Very few TFT display are offered in transflective.

There are more and more TFT displays used in outdoor applications, such as automobile display, digital signage and kiosks. High ambient light in outdoor environment often causes wash-out image and renders the screen not readable. Readability & sustainability of TFT  display under direct sunlight is becoming vital. Topway Display has been developing sunlight readable LCD display solution for years. The company understands the ins and outs of sunlight readable TFT LCD.

For an LCD to be readable in outdoor environment with very bright ambient light, the LCD screen’s brightness needs to exceed the intensity of light that is reflected from the display surface. To be comfortably viewed by human eyes, the LCD’s brightness needs to exceed its reflected light by a factor of 2.5 at minimum. Naturally, to make an LCD sunlight readable, we can work on two areas, increasing brightness or reducing reflectance.

On a clear day in direct sunlight, the ambient brightness is about 6000 cd/m2. And a typical TFT LCD with touch screen reflects about 14% of ambient light, which is around 840 cd/m2. These days, most LCD displays use LED backlight as light source. It is not too difficult to increase an LCD’s brightness to 800 ~ 1000 Nits, to overpower the bright reflected sunlight. Thus, you have a sunlight readable TFT LCD.

However, this method requires more backlight LEDs and/or higher driving current. The drawbacks are high power consumption, more heat dissipation, increased product size and shorter LED backlight lifespan. Apparently, increasing backlight to make TFT LCD sunlight-readable is not a very good solution.

Transflective TFT LCD is a TFT LCD with both transmissive and reflective characteristics. A partially reflective mirror layer is added between LCD and backlight. This change turns part of the reflected ambient light into LCD’s light source, increasing the TFT display’s brightness. However, transflective TFT LCD is more expensive than transmissive one. At the same time, the partially reflective mirror layer will block some of the backlight, making it not ideal in indoor or low ambient light environment.

The total reflectance on a TFT LCD with touch panel is the sum of reflected light on any interface where two materials meet. As an example, between polarizer and display glass, the difference in index of refractions for the two materials is very small, around 0.1. So the reflected light on this interface is only 0.1%. As Fresnel’s equation points out, we should focus reflection reduction on air interfaces. For air, its index of refraction is 1; for glass, it is 1.5. And that results in a reflectance of 4.5%. Therefore, the three air interfaces contribute majority of TFT LCD’s reflectance, at about 13%.

For food industry application, shattered glass is a serious problem. An LCD screen with external film solves this issue nicely. As for automotive applications, in an accident, broken LCD with top AR film won’t produce sharp edge glass that could harms auto occupant. Nevertheless, a top film always reduces TFT LCD’s surface hardness. And it is susceptible to scratches. On the other hand, AR coating retains LCD’s hardness and touch performance. But it comes with a bigger price tag.

Another quick and easy way to tackle reflectance is to affix a linear polarizer on the top of TFT screen. When ambient light gets to the top polarizer, only half of the light passes through. Which results in reflection light cutting to half. This is a very low cost way to increase TFT LCD’s contrast, such that making it more sunlight readable.

Laminating a circular polarizer in TFT LCD will get rid of a lot of reflectance. That is because when ambient light passes through circular polarizer it gets circularly polarized. And when it is reflected, the polarization direction flips by 180 degrees. So when reflected light comes back to the circular polarizer, nothing goes through to viewer’s eyes.

This method is very effective for an LCD display with resistive touch panel. We know resistive touch LCD has two air gaps: air gap between two ITO layers and air gap between touch panel and LCD display. Reflectance caused by the two air gaps is very high. Applying circular polarizer blocks off most of the reflected light, and makes the LCD display sunlight readable.

The disadvantage of such solution is its cost. Since we need not only a circular polarizer, but also a retarder film on the top of LCD display, making sure light originates from within LCD is not blocked by external circular polarizer.

Add AR films on both interfaces of internal air gap. The add-ons can reduce this area’s reflection from 8.5% to 2%. And since the AR films are not outside facing, they are much cheaper than the one used outside. Keeping the air gap also retains the ease of service, in case either touch panel or LCD display needs to be repaired.

The most effective way is to eliminate air gap totally, by using optical bonding. In plain language, we fill air gap with special optical adhesive, to smooth out the area’s refraction index differences. Such that reflectance caused by internal air gap drops from 8.5% to 0.5%. Optical bonding is expensive but effective way to improve TFT LCD sunlight readability. It enhances durability and resistance to impact. Moreover, no air gap means no moisture condensation and fogging.

There are many ways to make TFT LCDsunlight readable. They all have their own pros and cons. With 20+ years" LCD design and manufacturing experience, Topway knows how to create the best sunlight readable TFT LCD for challenging environments. Leave us a message and let"s start the conversation of creating suitable sunlight readable TFT LCD for your project.