How to distinguish the quality of LED display

The performance of LED display mainly includes gray scale, refresh rate, contrast and the following aspects:

Gray level, also known as color level or gray level, refers to the brightness of the display screen, it is the determinant of the number of LED display colors. In general, the higher the gray level of the LED display, the richer the colors, the more delicate the picture, and the more easy to show rich details.

Refresh rate refers to the number of times that the electron beam repeatedly scans the image on the screen. The higher the refresh rate, the better the stability of the LED display screen, the higher the resolution of the display screen, the high-definition screen without delay, and bring people very comfortable enjoyment.

Contrast refers to the measurement of different brightness levels between the brightest white and the darkest black in the area of light and dark in an image. The larger the difference range is, the greater the contrast, and the lower the contrast. Contrast is one of the key factors affecting the visual effect of LED display. Generally speaking, the higher the contrast, the clearer the image is eye-catching, the brighter the color is gorgeous. High contrast for the image definition, detail performance, gray level performance are very helpful.

Secondly, to identify the quality of LED display quality, we can also feel from the intuitive visual effect:

1, LED display surface flatness. The surface flatness of the display screen should be within ±1mm to ensure that the display image is not distorted. If the display body is raised or recessed locally, the viewing Angle of the display screen will appear dead. We look at the side of the screen and touch the surface of the screen to feel whether the flatness of the screen body is the same. The flatness is mainly determined by the production process.

2. White balance.

Through the LED display products red, green, blue panchromatic test and white balance test, we can see whether the LED display color phenomenon and timely adjustment.

3, brightness and visual Angle.

The brightness of indoor LED rental screen is generally between 800CD /m2 and 1200CD /m2, and the brightness of outdoor LED rental screen should be above 1500CD /m2 to ensure the normal operation of the display, otherwise it will be too low to see the image displayed.