Most industrial TFTs today have an edge LED backlight. The backlight illuminates the entire surface of the TFT, so if we reduce the brightness of the backlight, it affects the entire TFT surface at the same time.
(In-Plane Switching) IPS technology works in a similar way to TN technology. The difference is that the LC crystals are arranged in parallel and twisted by 90 ° in the plane. If a voltage is now applied to the two electrodes, which are both located on the backplane, the LC crystals all rotate in one direction.
