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LCD display Modes--Transmissive, Transflective, Reflective-JDA display

2023-12-21

According to display transmission modes, we typically classify LCD displays into three types, mainly including transmissive, transflective and reflective.


Reflective Displays

In reflection mode, ambient light is used to illuminate the display. There is no backlight source inside this kind of display. This is achieved by combining the reflector with the rear polarizer. It works best in outdoor or sunlight-readable environments. We can also find reflective display modes in graphic COG LCDs and character LCDs with positive display types. The most common devices using reflective LCDs are outdoor applications.


Transflective Displays

Transflective display is a hybrid of reflective and transmissive types. The transflective display combines backlight and ambient light to illuminate the pixels. They are combined with backlight and can be used for all types of lighting conditions. When there is sufficient external lighting, the backlight can be turned off to save power. In darker environments, the backlight is turned on to provide a bright display. Transflective LCDs are commonly used in industrial and medical equipment.


Transmissive display

There is a transparent rear polarizer that does not reflect ambient light. They rely on the backlight to be visible. They work best under low light conditions with continuous backlight on. For this kind of display module, light emitting from the back of the display glass must pass by the LCD towards the front to light the pixels. TFT usually with transmissive display module. For the transmissive display, the most common devices not only using transmissive LCDs are smartphones, tablets, computer monitors, and televisions. They are also used in digital cameras, automotive displays, medical equipment, and so on.


Transmissive displays work by transmitting light through the surface of the display. The light source of the transmissive display comes from behind the liquid crystal; The light source of the reflective liquid crystal comes from the front of the liquid crystal and is reflected to the observer's eye by the polarizing film of the lcd; Semitransparent liquid crystals fall between the two, with both light coming from behind and reflected light from the front. Therefore, transmissive displays require the use of a backlight source.


All in all, in the three LCD modes, transmissive LCDs are for low-light use, reflective LCDs are for bright-light use, and transflective LCDs work well in both environments.