Generally speaking, the refresh rate that human eyes can perceive obvious flicker or delay is around 60Hz. 20-30FPS is basically smooth, 30-60FPS is smooth, and 60+FPS is smooth. Based on this conclusion, many players can't feel the difference between 144Hz and 75Hz, because the refresh rate of 75Hz can ensure the frame rate of the picture to reach 60FPS, which is very smooth.
Therefore, most liquid crystal displays that usually come into contact with the market only provide the highest refresh rate of 60Hz or 75Hz. Among them, the picture refresh rate of 75Hz is the most basic flicker-free standard set by VESA, which is enough for daily office, audio-visual entertainment and light games.
However, for e-sports, the picture lag caused by low refresh rate will become a performance shortcoming that affects the performance of players, so there is a high refresh rate display of 144Hz.
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Although the higher the refresh rate, the better. However, it is suggested that the monitor should not always work at the highest refresh rate, which will accelerate the aging of CRT tubes. Generally, it is more appropriate to lower the maximum refresh rate by one or two steps. 85Hz is recommended.
The light-emitting principle of liquid crystal display (LCD) is different from that of traditional CRT, because every point of LCD always keeps that color and brightness after receiving the signal, and continuously emits light, unlike cathode ray tube display (CRT) which needs to constantly refresh the bright spots.
Therefore, the image quality of LCD is very high, and it will never flicker, which minimizes the fatigue of eyes. The refresh rate is of great significance to CRT. Sometimes, the high refresh rate of LCD will affect its service life. Generally, 60-75Hz is enough.