LCD Dynamic Image Display

Human visual organs (eyes) perceive dynamic images with the phenomenon of so-called "visual residue", that is, high-speed moving pictures will form a short-term impression in the human brain. Early cartoons, movies and even the latest game shows applied the principle of "visual residue", allowing a series of gradual images to be displayed in rapid succession in front of people, forming dynamic images.

When multiple images are generated at a speed exceeding 24 frames/s, the human eye will perceive continuous images. This is also the origin of the movie playback speed of 24 frames per second. If the display speed is lower than this standard, people will obviously feel the pause and discomfort of the picture. According to this index calculation, the time required for each picture to be displayed is less than 40ms. Fast moving images are displayed with high definition, and the general image movement speed exceeds 60 frames/s. That is to say, the interval time of each frame of the active picture is 16.67ms.

If the response time of the liquid crystal is longer than the interval time of each frame of the screen, people will feel that the screen is a little fuzzy when watching fast-moving images. Response time is a special indicator of LCD. The response time of LCD refers to the speed at which each pixel of the display reacts to the input signal, which is the response time of the liquid crystal from "dark to bright" or from "bright to dark". This value is as small as possible, and the response time is fast enough to ensure the consistency of the picture. If the response time is too long, it is possible that the LCD will have a trailing shadow when displaying dynamic images. The general response time of LCD is 2～5ms.