LED electronic screen after the completion of the quality of how to judge
Currently, LED electronic screens are entering millions of homes one after another. When choosing LED displays, it is often difficult to choose the right product, how to buy LED products? This article introduces the judgment standard of LED electronic screen.
1. Flatness
The flatness of the display surface must be within 1mm to prevent distortion of the display image, if part of the convex or concave, the display visual angle may become dead center. The flatness is mainly determined by the production process.
2. Brightness and visual angle
The brightness of indoor full-color LED electronic screen is 800cd/m2 or higher, and the brightness of outdoor full-color LED electronic screen must be 1500cd/m2 or higher for the display to work properly. Otherwise, the brightness is too low and the displayed image is not obvious. The size of the brightness is mainly determined by the LED core.
The size of the viewing angle directly determines the number of viewers displayed on the LED electronic screen, so the bigger the better. The size of the angle of view is mainly determined by the encapsulation method of the core.
3. White balance effect
White balance effect is one of the most important indicators of LED electronic screen. Color science is red, green, blue the ratio of the three primary colors only in 1: 4.6: 0.16 will show pure white, the actual ratio of slight deviation will appear white balance deviation, generally pay attention to the white whether there is bias, yellow-green phenomenon. The white balance is mainly determined by the display control system, the tube core affects the color reproducibility.
4. Color reproducibility
Color reproducibility ensures the authenticity of the image, because the color of the LED electronic screen display matches very well with the color of the playback source.
Is there any mosaic or dead space phenomenon?
Mosaic is the LED electronic screen appears on the four bright, often blackened small squares, module necrosis phenomenon is the biggest reason for the quality of the connecting equipment used on the display is closed.
Dead spot mainly depends on the core of the tube is good or bad, is the LED electronic screen appears on the bright or often black single point.
6. With or without color blocks
Color block in the color difference between adjacent modules is obvious, the color conversion to the module as a unit, so the phenomenon of color block is mainly due to a bad control system, gray level is not high, low scanning frequency.
