LCD display screen is a backlit display, it does not emit light, the light source provided by the backlight/backlight plate behind the LCD module, inevitably resulting in the LCD display screen only one of the best viewing Angle - facing. When you look at it from another Angle, color distortion occurs because the backlight can pass through the next pixel and into the eye. The true range is called the viewing Angle. The viewing Angle of LCD is divided into horizontal viewing Angle and vertical viewing Angle. The horizontal viewing Angle is generally greater than the vertical viewing Angle.

In life, I think we've all noticed that LCD display screen have different effects from different angles. When observed from the center of the display screen, the intensity of light entering the human eye is different from that observed from the side. For the same picture, there is a bright part and a dark part, that is, the contrast is different. Combined with the definition of perspective, the corresponding viewing Angle of the screen is the perspective within the range where the contrast can be accepted by the human eye.


The viewing Angle of an LCD display screen is a headache. When the backlight passes through the polaroid, the liquid crystal and the orientation layer, the output light becomes directional. That means most of the light is emitted vertically from the screen, so if you look at the LCD from a larger Angle, you won't be able to see the original color, or even all white or black.


LCD display screen on the market, with a horizontal viewing Angle of 120 degrees and a vertical viewing Angle of 140 degrees, can meet the needs of most users. The new LCD display panels are made with a wide-angle technology that allows them to see 140 degrees up and 150 degrees down, reducing the inconvenience of having too small a viewing Angle. Of course, this isn't comparable to the nearly 180-degree viewing Angle of a CRT display screen, but it's more than enough for most applications.



Visual Angle analysis of LCD display screen