Four Photos Learn LCD viewing angle -- IPS & TFT

IPS is an LCD wide viewing angle technology, is widely used in the manufacture of LCD, can effectively improve when the viewing angle difference, TN screen color and other problems.

12 O'clock viewing angle

6 O'clock viewing angle

3 O'clock viewing angle - 9 O'clock viewing angle

TN type electrode on the two substrates, the direction of the applied electric field is perpendicular to the substrate, the liquid crystal molecules relative to the substrate is parallel and vertical movement in two directions; IPS type of applied electric field is horizontal, so the liquid crystal molecules are parallel to the substrate The liquid crystal molecules which do not apply electric field are homogeneous, and the upper and lower polarizing plates are arranged at 90 degrees and are always perpendicular. The polarizing axis of the bottom polarizing plate is the same as that of the liquid crystal molecules. The incident light passes through the liquid crystal layer aligned in parallel and does not change the direction of travel by the straight line. The emitted light can not pass through the upper polarizing plate, thus exhibiting an opaque black state. , The liquid crystal molecules will twist, resulting in birefringence in the liquid crystal layer, which will change the direction of the incident light travel through the upper polarizing plate, showing light transmission state. When the liquid crystal molecules are aligned in a direction smaller than the inclination angle, the viewing angle of the black state is increased, and the viewing angle of the light-to-darkness ratio is widened.