How to identify a full-color LED display is good or bad? - - - - - - Full color LED screen - knowledge

A LED display screen, the smoothness of the surface roughness to within + / - 1 mm, to ensure that the 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 the brightness of the indoor full color, brightness and visual Angle to above 800 CD/m2, outdoor full color brightness to above 1500 CD/m2, to guarantee the normal work of the screen, otherwise they will be because the brightness is too low and not see clearly 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. Three, the 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. Four, the reducibility of color reducibility is refers to the display of color reducibility, both display screen color to maintain highly consistent with the colour of the source, so as to ensure the image sense of reality. Five, is there a 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 screen by using the plug-in quality closes nevertheless. Dead point refers to appear on the LED display normally on or black often a single point, how many of the dead point mainly determined by the stand or fall of pipe core. Six, the presence of the shades of color piece is refers to the adjacent modules between relatively clear off color, color transition to module for the unit, poor color piece phenomenon caused mainly by the control system, grey level is not high, caused by lower scanning frequency.