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Home > Technology News

What is the response time of LCD?

Author : China LCD screen supplier

Update time : 2020-01-16 16:51:27

Response time refers to the reaction speed of the LCD to the input signal, that is, the reaction time in which the liquid crystal changes from dark to bright or from bright to dark (the brightness from 10% to 90% or 90% to > 10%), usually in millisecond (ms). To make this clear, we also need to start with the human eye's perception of dynamic images. There is a phenomenon of "visual residue" in the human eye, and the picture of high-speed movement will form a short-term impression in the human brain. Cartoons, movies and so on until the latest game is the application of the principle of visual residue, so that a series of gradual images in front of people quickly and continuously display, and then form a dynamic image. The display speed that people can accept is generally 24 frames per second, which is the reason why the film plays at 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, the display time of each picture needs to be less than 40ms. In this way, for the LCD, the response time 40ms has become a hurdle, higher than the 40ms display will appear obvious picture flicker phenomenon, making people feel dazzled. If you want the image to be unblinking, it is best to achieve a speed of 60 frames per second.
I use a very simple formula to calculate the number of pictures per second under the corresponding reaction time as follows:
Response time 30m / s / s = 0.030 = 33 frames per second are displayed.
Response time 25m / s / s = 0.025 = about 40 frames per second are displayed.
The response time is 16msresponse 1thumb 0.016 = about 63 frames per second are displayed.
The response time is 12msroom1amp 0.012 = about 83 frames are displayed per second.
The response time is 8msroom1thumb 0.008 = about 125 frames per second are displayed.
The response time is 4msresponse 1thumb 0.004 = about 250 frames per second are displayed.
The response time is 3msresponse 1thumb 0.003 = about 333 frames per second are displayed.
The response time is 2msresponse 1thumb 0.002 = about 500 frames per second are displayed.
Response time 1msresponse 1thumb 0.001 = display about 1000 frames per second.
Tip: through the above, we know the relationship between the response time and the number of frames. In view of this, the shorter the response time, the better. At that time, when the LCD market started, the lowest response time was 35ms, mainly products represented by EIZO. Later, BenQ's FP series was launched to 25ms, from 33 frames to 40 frames. The real qualitative change was 16ms, displaying 63 frames per second to meet the requirements of movies and general games, so 16ms was not out of date. With the improvement of panel technology, BenQ and YouPay began to fight for speed. YouPai has been released from 8ms to 4ms to 1ms, so 1ms can be said to be the Terminator of the LCD speed battle. For game enthusiasts, fast 1ms means that the shooting of CS will be more accurate, at least psychologically, and such customers should recommend VX series monitors. But when you sell, you should pay attention to the grayscale response, the text difference of full-color response, sometimes grayscale 8ms and full-color 5ms say the same meaning, just like when we used to sell CRT, we said that the distance was .28 LG, so we had to say he was .21. The horizontal point distance is ignored without talking about it. In fact, the two are talking about the same meaning. LG has come up with a sharpness of 1600 1, which is also a concept of hype. People basically use only a few screens. How can it be that only LG can achieve 1600 VR 1, while everyone stays at the level of 450 VR 1?. When it comes to consumers, they clearly understand the meaning of sharpness and contrast, just like the PR value of AMD, which has no real meaning.

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