What is refresh rate and why does it matter for LED Display?

The refresh rate of an LED display, also known as “visual refresh frequency” or simply “refresh frequency,” refers to the number of times a screen displays an image repeatedly per second. It is measured in Hertz (Hz). The refresh rate is a crucial indicator of stable and flicker-free visuals on an LED display. A higher refresh rate monitor results in more stable imagery, reduced visual flicker, and, in other words, better protection for your eyes.

What are the different refresh rates for LED displays?

The refresh rate is a vital metric to gauge the stability of images on an LED display. A higher refresh rate results in more stable visuals and less visual flicker, which, in turn, helps protect your eyes.

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refresh rate comparison

What factors influence the refresh rate of an LED display?

Among the core components of an LED display, including the LED power supply, LED driver chips, and LED modules, the LED driver chips have a significant impact on the screen’s refresh rate.

Using regular driver chips, you can achieve a refresh rate of up to 960Hz. However, employing dual latch driver chips can significantly boost the LED display’s refresh rate and high-definition, advanced PWM driver chips can push the refresh rate to 3840Hz.

What’s the difference between standard and high refresh rates in LED displays?

As long as the LED display’s refresh rate is higher than 960Hz, the human eye can barely distinguish between standard and high refresh rates. In the case of full-color LED screens used for playing videos and images, the difference is almost imperceptible to the naked eye but can be discerned through smartphones high-definition cameras, and recording equipment.

Standard refresh rate screens may exhibit ripple effects and flickering when photographed with a mobile phone, while high refresh rate screens won’t have these issues.

What is the suitable refresh rate for an LED display?

The appropriate refresh rate for an LED display primarily depends on the screen’s purpose and the environment in which it’s used. For indoor full-color LED displays, a refresh rate of 1920Hz (standard) can meet the requirements. However, if you intend to use the display for photography or video recording, it’s advisable to opt for a high refresh rate of 3840Hz or above.

To avoid ripple effects, LED displays should have a refresh rate greater than twice the camera’s shutter speed. With most cameras having a shutter speed of around 1/2000 second, neither the typical 1000Hz refresh rate of horizontal-flow driver ICs nor the 1920Hz refresh rate of dual latch driver ICs is sufficient. Only LED displays with a refresh rate of 3840Hz or higher, using advanced high-definition PWM driver ICs, can effectively prevent ripple effects when photographing.

Modern movies typically have a frame rate of 24Hz, meaning there are 24 frames displayed per second. When you play a 24Hz movie on a 3840Hz refresh rate LED display, each frame is refreshed 160 times (3840/24), making it imperceptible to the human eye. This results in smoother visuals and higher clarity.