Led display quality standards

Full color LED display quality how to distinguish? According to the smoothness, brightness, white balance, color and so on several big point for analysis. Hope I can help you. 1. Flat screen surface roughness to within + / - 1 mm, to ensure that the display image is not distorted, local convex or concave leads to display the visual Angle of corner. The stand or fall of flatness is mainly decided by the production process. 2. Brightness and the viewing Angle of indoor full color brightness to above 800 CD/m2, outdoor full color brightness to above 5500 CD/m2, to guarantee the normal work of the screen, otherwise it will because the brightness is too low and can't see shown in the image. Mainly by the size of the brightness of led tube core is good or bad decision. Viewing angles directly depends on the size of the display screen of the audience, and the bigger the better. The size of the viewing Angle is mainly composed of tube core encapsulated way to decide. 3. LED display white balance effect white balance effect is one of the most important indicator display. Chromatology on red, green and blue color for the proportion of 1:4. Lost. 16 will only show the pure white, if the actual rate is a little deviation will appear white balance deviation, generally pay attention to whether there is a slant blue, white slant yellow phenomenon. The stand or fall of the white balance is mainly composed of display control system to determine, tube core of color reducibility may also be affected. 4. LED the reducibility of color reducibility is refers to the display of color reducibility, the color of the display shows both to maintain highly consistent with the colour of the source, so as to guarantee the image sense of reality that is consistent with the nature color, guarantee the realistic effect. 5. Dead refers to the phenomenon of Mosaic Mosaic, appear on the screen normally on or often black small four squares, both module necrosis phenomenon, the main reason for the display of connectors quality closes nevertheless. Dead point refers to appear on the screen normally on or black often a single point, how many of the dead point mainly determined by the stand or fall of pipe core. 6. Exist between those with and without the shades of color piece is refers to the adjacent modules are clear off color, color transition in module, color piece phenomenon caused mainly by the control system is poorer, grey level is not high, caused by lower scanning frequency. 7. Blind spot rate control: blind spot rate is usually a bright spot, dead center, dark spot, outdoor blind spot rate is less than three over ten thousand of the screen, indoor screen blind spot rate will be control in two over ten thousand.