The basic knowledge of LED display refresh rate is explained

113 views admin 2023-10-13

The refresh rate of the LED display is also called "visual refresh frequency" and "refresh frequency", which refers to the number of times that the display screen is repeatedly displayed by the display screen per second, and the unit is Hz (Hertz). Refresh rate is an important indicator to characterize the stability of the LED display screen without flickering. The higher the LED display refresh rate, the more stable the screen display, the smaller the visual flicker, in other words, the better the protection of vision.

Refresh rate is an important indicator to characterize the stability of the LED display screen without flickering. The higher the LED display refresh rate, the more stable the screen display, the smaller the visual flicker, in other words, the better the protection of vision.

In the several core components of the LED display - LED power supply, LED driver chip, LED lamp beads, LED driver chip has a greater impact on the screen refresh rate.
When using the ordinary driver chip, the refresh rate can only reach 960Hz, while the use of dual latch driver chip can greatly improve the refresh rate of the LED display, and the use of high definition and high order PWM driver chip can make the LED display refresh rate reach 3840Hz.

LED display refresh rate as long as higher than 960Hz, the human eye is basically indistinguishable. High brush and general brush full color led display screen when playing video and pictures, it is almost impossible to distinguish with the naked eye, but through mobile phones and high-definition cameras, video equipment shooting can be distinguished.

The screen with the normal brush will have water ripples when taking a photo with the phone, and the picture will appear to flicker, while the screen with the high brush will not have water ripples.

How much of the refresh rate of the LED display is suitable mainly depends on the screen use and use environment. If it is an indoor full-color LED display, 1920Hz (general brush) can meet the needs, if you want to use photos, video, then it is recommended to choose 3840Hz high brush as far as possible.

Generally, only when the refresh rate is greater than 2 times the camera shutter speed, the LED display will not appear water ripples. At the shutter speed of 1/2000 second in the camera, the nearly 1000 refresh rate of the ordinary cross-flow driver IC and the 1920Hz refresh rate of the double-latched driver IC are not enough to avoid water ripples, only the high-definition and high-order PWM driver IC with a refresh rate above 3840Hz can ensure that the LED display does not appear water ripples when taking photos.

The current film frame change frequency is generally 24Hz, that is, there are only 24 frames in one second. The 24Hz frame rate movie is played on the LED display with 3840Hz refresh rate, 3840/24 = 160 times, that is, each frame of the movie is refreshed by the display 160 times. This refresh speed, the human eye is not aware of the picture flicker, so the display fluency is better, higher clarity.