How to identify the quality level of the LED display

　　1. Brightness

　　The level of brightness gives people a very intuitive feeling. You can distinguish the height at a glance. Do not think that the higher the brightness of the display, the better. It is more suitable for 1000NIT. The display screen used outdoors is higher than 6000NIT, while the semi -outdoor 2500 to 5000NIT is more appropriate. The brightness of the display screen of the small spacing is lower, about 100 to 300nit. Under the premise of seeing the image in the environment, watching the eyes for a long time does not cause tingling.

　　2. Color temperature

　　When we see the color of the image inconsistent or different from the material on the display, then our picture is seriously distorted, which is related to the color temperature of the white balance of the display screen. The color temperature value is more appropriate between 6500 and 8000K, and if the display used by TV station broadcast, the actual color temperature of the screen needs to be adjusted to about 5500K, so that the screen on the display on the display after recording the camera is true.

　　3. Perspective angle

　　For the display device, the greater the perspective, the greater the range of viewing. The perspective of the display screen is divided into horizontal perspective and vertical perspective. At present, the horizontal view angle of the full -color screen of indoor can be greater than 140 degrees. The vertical perspective is greater than 100 degrees. On the basis of clearly and complete viewing of the image within the perspective range, the phenomenon of different perspectives cannot appear. Method, the effect comparison is shown in the figure below:

　　4. Gray

　　When the image layers on the display are poor, and the pixel loss is compared with the material, it shows that the gray level of this screen is low, and the content of the material cannot be fully and honest. Its professional test method is the test of the grayscale bar can intuitively see the level of the gray level. At present, the gray level of 16bit can be achieved in the industry. The follow -up will reach 18bit.

　　5, refresh rate

　　When the person's eyes are directly watching the display, it feels that the picture has a flashing phenomenon. When shooting a lot of horizontal dark lines when shooting with a camera or camera, the refresh rate of this screen is lower. Under the conditions that do not affect the direct viewing of people's eyes, the refresh rate of the display should not be less than 300Hz, but to meet the requirements of cameras and cameras such as cameras and cameras, the refresh rate of the display should reach more than 2000Hz. The picture below shows the high and low refresh rate under the high and low refresh rate. Comparison of effects:

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