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LCD panel and black and white LCD panel related knowledge

日期: 2019-02-19
浏览次数: 207

The LCD panel determines the light and dark of the light

The liquid crystal display emits bright light from the rear backlight source, and the bright light is controlled by the voltage of the front liquid crystal panel to control the liquid crystal molecules (passing or blocking the light) to display a light and dark image.

The LCD panel is basically similar to the shutter in the camera to control the passage and obscuration of light. The camera has a mechanical shutter behind the lens, and the shutter opens when the camera is photographed, so that the object being photographed is imaged on the film to form a photo. On the other hand, the liquid crystal panel emits light of uniform brightness from the backlight, and the light is obscured by the liquid crystal panel or controlled to express the image by light and dark.

LCD panel and black and white LCD panel related knowledge
 The basic principle of black and white LCD panels     

When you look at the image in the LCD monitor, you will find that the light passing through the LCD panel is not only in the light and dark states. It must have two states from light to dark, and must have various levels from light to dark. In addition, when we are watching a moving image, it is actually a moving image formed by playing a still picture that is different in sequence and close to the motion. Because the human eye has a visual stop effect, the impression that the previous picture stays in the brain has not disappeared, and the latter picture followsmoreover, the difference between the two pictures is very small, and one action is displayed with many sub-pictures, so that we feel that the picture is moving.

LCD panel and black and white LCD panel related knowledge

The process of this water balloon explosion

This process of updating the image is what we often call 'image refresh', which is the refresh rate. In the normal case, the refresh rate is 60 Hz, which is an action on a moving image, which requires 60 screens switching in one second (60 times in one second). In order to express the fineness of the picture, it is necessary to have enough pixel points to control the surface structure of each pixel to be fine enough.

Therefore, the liquid crystal display uses a liquid crystal panel capable of controlling the lightness and darkness of the light at a high voltage. If you want to display a color picture, configure a color filter in front of the LCD panel to add color to the light and dark light.

 


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