- Sep 11, 2018 -
Active matrix LCD displays have lower electrical power than CRTs. In fact, it has become the standard display for portable devices, from PDAs to laptops. But the efficiency of LCD technology is still too low: even if you display the screen white, less than 10% of the light emitted from the background source is emitted through the screen, and the others are absorbed. Therefore, the current plasma display has a lower power consumption than the LCD screen of the same area.
Reflective displays are often used on PDAs such as Palm and Compaq iPAQ. This means that ambient light enters the display screen, passes through the polarized liquid crystal layer, collides with the reflective layer, and is reflected to appear as an image. It is estimated that 84% of the light is absorbed during this process, so only one-sixth of the light is active, and although it needs to be improved, it is sufficient to provide the contrast required for visual images. Unidirectional reflective and reflective display makes it possible to use the LCD display with minimal energy consumption under different lighting conditions