How to Check the Quality of LED Displays

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As a medium of publicity, LED displays can be seen in our life or work. With the increasing application of LED displays, there are more and more manufacturers of LED displays on the market. But many people don't know how to identify whether the LED screen is good or bad. This post will give you a few simple ways to identify the quality of LED displays.

LED beads

What is the most important component of LED display? Anyone who knows the LED display industry knows the answer, that is LED beads. The quality of LED beads can be viewed from several aspects such as brightness, LED chip, glue, and packaging process.

The use of low-quality LED beads not only affects the display effect, but also greatly shortens the life of the LED display, and even easily causes problems such as dead light and large color differences. Therefore, a high-quality LED display must be a display that uses high-quality LED beads.

 LED Displays


White balance effect

The white balance effect is one of the most important indicators of the display. The quality of the white balance is mainly determined by the brightness wavelength ratio of the LED die and the control system of the display. When the ratio of the three primary colors of red, green and blue is 1:4.6:0.16, the screen will display the purest white. Therefore, if the display screen produced by the outdoor LED display manufacturer has a slight deviation in the ratio of the three primary colors, which will affect the display quality of the LED display, so it is also very important to check the white balance when purchasing.


The grayscale of the LED display refers to the degree of lightness and darkness of the luminance. Generally speaking, the higher the grayscale, the richer the displayed color, the more delicate the picture, and the easier it is to express rich details. If the gray level is insufficient, the color level will be insufficient or the gradient color gradation will not be smooth enough, and the color of the video cannot be fully displayed. The LED display effect is greatly reduced.

 LED Displays


The brightness of the screen is mainly determined by the quality of the LED die. The brightness of LED display is not the higher the better. It mainly depends on your use environment and viewing distance. Indoor displays are generally around 1000nit, and outdoor displays are usually higher than 6000nit, while semi-outdoor displays are more suitable between 2500 and 5000nit, and the brightness of small-pitch displays is lower, around 100 to 300nit. If the brightness is not suitable, the viewer's eyes will be tired and tingling after watching for a long time.


The flatness is mainly determined by the production process. The surface flatness of the LED displays should be within ±1mm to ensure that the displayed image is not distorted, and local protrusions or recesses will cause dead angles in the viewing angle of the display. The gap between the box and the module should be within 1mm. If the gap is too large, the border of the display will be obvious and the vision will be uncoordinated.

Refresh rate

The refresh rate of an LED display refers to how many times per second the display is able to draw a new image. This is measured in Hertz (Hz).

Generally speaking, in order to present a high-quality image, the refresh rate of the LED display screen should be higher than 1000Hz. The refresh rate of the ordinary LED display screen is 1920Hz, and the high refresh rate of the LED display screen can reach 3840Hz or even higher.

A higher screen refresh rate is the guarantee of high-quality images. The higher the refresh rate, the more stable the display, and the clearer the display will be, without flickering or water streaks.

The low-refresh LED display will affect the picture, and water ripples appear on the screen when using. When people are watching, it may cause discomfort to eyes.

Purchase high-quality LED displays from us

Premteco has built up an outstanding reputation in the industry by supplying consistent and reliable LED display products, which allow you to build a strong brand image, and catch the attention of new potential customers or enhance the visual performance of your stage. If you need any LED displays, please kindly contact us today!


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