transmissive lcd display factory

“Reflective”, “transmissive” and “transflective” are terms often used in connection with liquid crystal display (LCD) technology. They describe the ways in which LCD display modules are illuminated. In contrast to the emissive display technologies, like OLED displays (organic light-emitting diode) and VFDs (vacuum fluorescence displays), LCDs require a light source such as the sun, or artificial room light, or an integrated backlight, which is typically lit by LED (light-emitting diode) semiconductors.

The mode of operation when light from a backlight passes through the LCD glass is called transmissive. The LCD glass or LCD panel functions as an “optical switch” where light from the backlight passes through the LCD cell depending on the orientation of liquid crystal molecules. The orientation can be “switched” on or off by an electrical field. Backlights produce a lot of light, making the display content very bright. The negative side of using backlights is that they require a significant amount of energy within an LCD display module, especially because the backlight is required to be on all the time even if there’s no content showing on the display. In direct sunlight, a transmissive LCD screen can become ‘washed-out’ if the sunlight overpowers the luminance of the backlight. Strong enough backlights to maintain sufficient contrast in direct sunlight – such as in aviation displays – are not compatible with the requirements of portable devices.

Some displays use ambient light rather than a backlight (View our Sun Vision Display brand of outdoor digital signage for an excellent example). This mode of operation is called reflective. In reflective mode, a mirror is installed behind the liquid crystal layer, either inside the LCD cell or on the rear polarizer. Ambient light passes through the LCD cell from the front side and is reflected by the mirror back to the viewer. The advantage is lower power consumption and excellent visibility in direct sunlight, making such displays excellent solutions for outdoor daytime applications. To be visible at night or in dark settings, reflective LCDs require additional lighting.

Transflective LCD displays have both transmissive and reflective characteristics. They contain an integrated backlight unit and a semi-transparent reflector or a reflector with a hole for each pixel. Again, the reflector can be behind the rear polarizer or inside the LCD cell behind the liquid crystal layer. Light from the backlight can pass the semi-transparent reflector and operate the display in the transmissive mode. At the same time, ambient light can be reflected so that the display is visible in direct sunlight as well. Care must be taken to account for the fact that in the transmissive mode of operation the light passes the liquid crystal layer once, while in the reflective mode it passes the liquid crystal layer twice. The appearance of transflective displays is a compromise. It is the most flexible solution as it allows for lower power consumption in bright environments and readability in any lighting condition. This comes at the expense of top performance in the pure illumination modes and sometimes significant additional manufacturing cost.

A transflective liquid-crystal displayliquid-crystal display (LCD) with an optical layer that reflects and transmits light (transflective is a portmanteau of transmissive and reflective).contrast being constant with illuminance. However, under dim and dark ambient situations the light from a backlight is transmitted through the transflective layer to provide light for the display. The transflective layer is called a transflector. It is typically made from a sheet polymer. It is similar to a one-way mirror but is not specular.

An application is digital LCD wristwatches. In dim ambient light or at night a backlight allows reading of the display in its transmissive mode.alarm clocks for bedrooms may also work this way. If they are battery-powered, the backlight may be push-button operated. The backlighting is usually dim, so that the display is comfortably readable at night. Some 21st century smartwatches such as the Pebble Smartwatch and the Amazfit Stratos also use transflective LCDs.

When an illuminance sensor is added for control of the backlight, such a transflective LCD can be read over a wide range of illuminance levels. This technique is often found in automotive instrumentation. In portable electronic devices the transflective mode of operation helps to save battery charge, since in bright environments no backlighting is required.

Some displays that transmit light and have minor reflectivity are best readable in the dark and fairly readable in bright sunlight, but only under a particular angle; they are least readable in bright daylight without direct sunlight.

Illuminating Arrangement for a Field-Effect Liquid-Crystal Display as well as Fabrication and Application of the Illuminating Arrangement, filed Oct. 15, 1976.

A wide variety of transflective lcd display options are available to you, You can also choose from original manufacturer, odm transflective lcd display,As well as from tft, ips, and standard.

TRANSFLECTIVE is a portmanteau of TRANSmissive and reFLECTIVE. A transflective LCD combines the best features of a reflective LCDs and transmissive LCDs.

A transflective LCD will reflect ambient light, allowing it to be visible in normal office light without using a backlight. In bright sunlight, a transflective LCD is still visible and does not wash out–this is also called “sunlight readable.”

A transflective LCD also allows light from a backlight to transmit through the LCD. So a transflective LCD with a backlight can be seen in dark environments.

If you have any questions about transmissive, reflective, or transflective displays or what type of display module would work best for your project, please contact our knowledgeable and friendly support staff by email, phone, or chat for assistance.

Transmissive LCD is the most common LCD screen, which requires a backlight as the light source and there is no reflective film at the back of the LCD screen.

Advantage: we can see the graphic and character on the screen very clearly if there is only little light. It is such a mature and cheap technology that 90% of LCD screens in the market are transmissive LCD display.

Reflective LCD is the cheapest LCD screen because there is no backlight, which uses light from outside as the light source, such as sunshine or lamplight and there is a reflective film at the back of the LCD screen.

Transflective LCD is the best and most expensive LCD screen, which has a semi-reflective film at the back of the LCD screen. The front light can’t go through the semi-reflective film, but the backlight can go through it. Like sunglasses.

Advantage: it has the advantages of both transmissive LCD and reflective LCD. We not only can see it very clearly in the outdoor like the reflective LCD, but also can see it vividly when we are in a dark place like a transmissive LCD. We see the transflective LCD in the front as the reflective LCD because it can reflect the sunshine, but the LED backlight panel can also supply the light which can penetrate the semi-reflective film at the back of LCD screen.

This article covers the LCD polarizer differences between the Reflective polarizer, the Transflective polarizer, and the Transmissive polarizer. A polarizer allows some light to pass through the liquid crystal display and some light to be reflected back towards the user of the display. There are three types of polarizer’s used in LCD display modules. These include character (alphanumeric) LCD modules, Segment (static) LCD displays, and graphic LCD displays.

Reflective Polarizer - In the reflective mode, ambient light (the light that is available from the sun, office lights, etc.) is used to illuminate the display. A reflective LCD module works the same as a mirror. It will reflect all the light it cast on it, but it will block any light that is placed behind it. The light comes in from the front and bounces off the mirror in the back. There is no backlight from behind, but edge lighting can be used.

Tranflective Polarizer - A Transflective polarizer is a combination of both a reflective polarizer (no light may pass through) and a Transmissive polarizer (all the light can pass through). The Transflective mode LCD allows the user to read the display when the backlight is OFF. When necessary a backlight placed behind the polarizer can be turned ON. This allows the user to read the display when in a dark location or ambient light is very dim.

This is kind of like a two-way mirror. The light comes in from the front and a backlight placed behind it will shine through. This is used in all types of lighting conditions. This makes it possible to read the LCD with the backlight ON and with the backlight OFF. This is the most common polarizer for any backlight. If the customer is not sure what they want, and they have a backlight choose a transflective.

Transmissive Polarizer - A Transmissive polarizer allows all light to pass through the display. The backlight must be ON for the user to read the display. The backlight on the transmissive polarizer is very bright. The LCD is difficult to read when the backlight is OFF. But it is still possible to read the characters.

Choose the polarizer based on the type of lighting conditions your display will operate in. There is no difference in cost or lead time between Reflective, Transflective and Transmissive polarizer. Note: It is possible to build any of the three polarizer’s as a TN display, STN display or FSTN display

If you have any questions regarding LCD polarizer differences, feel free to contact Focus Displays Solutions for US-based support. You can call 480-503-4295 or simply fill out the contact form to the right of this article.

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At Youritech, we design and manufacture standard, semi-custom and full custom LCD/OLED display modules,touch screen,driver board,open frame. Contact us today,let our engineering team quickly and accurately feedback you with details.

“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.

NM81503is monochrome lcd display module. The characteristics of this display module are high brightness, high contrast ratio, wide viewing angle and low power consumption. This product accords with RoHS environmental criterion.

Answer: For the segment type LCD module, if you need to modify the outline size or display content, we will start the drawing paper for your checking.

Answer: Yes, we can. Please send us your drawing paper. If you don’t have, please tell us the information of the display and your demand. We will evaluate the cost and give you the price soon.

Answer: If we have stock for the standard displays, the leading time is one day after payment. If it is mass production for special ones, the leading time is about 15~30 days. If we finish earlier, we will send email to you in advance.

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