What is a reflective LCD?
summary
There are three types of tft screens, transmissive display, reflective display, and transflective display. Among them, transmissive displays are the most widely used, while transflective displays and reflective displays are only used in special fields, and they require special designs to achieve low power consumption with low resolution and low color gamut.
3.The actual display effect of Reflective LCD display
If you have read the article on LCD power consumption (if you haven’t read it, you can click the link to read it), you will find that 90% of the power consumption of LCD is from the backlight. If there is no backlight, the power consumption of individual LCD is very low, only 80mw-180mw depending on the resolution. How to apply LCD to more areas, such as to require high power consumption equipment, unable to provide power supply equipment, according to the request was developed using the ambient light to assist illume or completely replace the back light technology.
What is transmissive vs reflective LCD? Liquid crystal displays can be divided into three categories according to the source of brightness, namely projective liquid crystal displays, semi-reflective and semi-transparent liquid crystal displays, and reflective liquid crystal displays.
Transmission LCD display
The common liquid crystal display in daily life is the transmission type liquid crystal display, the projection type liquid crystal display itself has high brightness, good optical performance,
According to different design requirements, LCD can do 200nit-3000nit or higher brightness, and can use the control circuit to adjust the brightness, which greatly increases the scope of use of LCD, regardless of any environment only enough power supply, LCD must be able to meet your requirements.
The color gamut of transmissed-type LCDS is usually about 70% due to sufficient light source, which can be improved to 100% or even higher. And because of the high brightness, the contrast is also very high, can do 2000:1.
Reflective LCD display
How does a reflective LCD work? Due to the high power consumption of the backlight, conventional transmission-type LCD displays cannot be used if low power consumption is required. Reflective LCD displays, on the other hand, use ambient light as a source of light through a special TFT design, making long endurance possible.
Especially in the field of outdoor displays, fully reflective LCD displays have obvious advantages, low power consumption, fast refresh, and use of natural light more eye protection.
Reflective LCDS also have drawbacks. For example, they must be used in ambient light. The special design makes the display have a low gamut, low contrast and low brightness, but they have a longer life and a higher refresh rate than e-paper.
The actual display effect of Reflective LCD display
According to different design requirements, LCD can do 200nit-3000nit or higher brightness, and can use the control circuit to adjust the brightness, which greatly increases the scope of use of LCD, regardless of any environment only enough power supply, LCD must be able to meet your requirements.
The color gamut of transmission type LCDS is usually about 70% due to sufficient light source, which can be improved to 100% or even higher. And because of the high brightness, the contrast is also very high, can do 2000:1.
Semi-reflective and semi-transmitted LCD display
Fully reflective LCDS cannot be used in total darkness, and although lighting can be added in front of fully reflective screens to improve this, this limits the scope of application.
Semi-reflective and semi-transmitted liquid crystal display makes up for this shortcoming. It can not only use ambient light, but also use the backlight with low power consumption to work, which undoubtedly increases the application range of liquid crystal display, achieving a balance in power consumption and function.
conclusion
Reflective LCD and semi-reflective and semi-transmitted LCD require special design and small application scenarios, so the product price is higher, but if you need low power consumption, fast refresh rate, this is your best choice.
If you have requirements for the display effect, it is recommended that you choose a high-brightness display or sunlight readable display. High brightness can achieve the same ability to be seen in outdoor environments as a total reflection display or a transflective display, but with richer colors and better effects.
