Page-3 news - Dongguan Yijia Optoelectronics Co., Ltd.

A Feature Of Lcd Screen The first feature of the LCD screen is that it must be slotted between two planes in order to work properly. The grooves in the two planes are perpendicular to each other (90 degree crossing), which means that if the molecules in one plane are aligned north-south, and the molecules in the other plane are aligned east-west, the molecules between the two planes are forced Do a 90-degree twist. When light travels in the direction of the molecule, it is also twisted 90 degrees as it passes through the liquid crystal. But when a voltage is applied to the liquid crystal, the molecules are rearranged vertically so that light can be emitted directly without being twisted. The second feature of LCD is that it relies on polarizers and the light itself, which scatters randomly in all directions. A polarizer is actually a series of increasingly thin parallel lines. The lines form a network that blocks all light rays that are not parallel to them. The polarized lines are perpendicular to the first line, so they completely block the already polarized lines. Light will only pass if the lines of the two filters are perfectly parallel, or if the light itself is twisted to match the second filter. Liquid crystal displays consist of two polarizing filters that are perpendicular to each other, so under normal circumstances any light trying to penetrate should be blocked. But because both filters are twisted liquid crystals, when light passes through the first filter and exits the second filter, the liquid crystal molecules twist the light by 90 degrees. On the other hand, if a voltage is applied to the liquid crystal, the molecules rearrange to be perfectly pa