Why do LED display need point correction? Ideally, if each pixel on the screen at any point of the light brightness, chroma is always consistent, you can think screen is uniform. In the actual production process, the uniformity of the screen will be affected by many factors, so there is no correction of the homogeneous degree of the LED display can't achieve ideal level, image quality compared with other flat-panel displays obvious gap. Factors leading to poor LED display uniformity is very much, such as:
LED by itself the discreteness of birth defects:
(1) LED lamp manufacturers provide own existence on the brightness and chromaticity difference;
(2) the spatial distribution characteristics of the LED luminous intensity exist difference, which leads to the different leds at any Angle on the luminous intensity attenuation value relative to the optical axis direction inconsistencies.
Display manufacturing process of the introduction of many other factors:
(1) module assembling flatness;
(2) the smoothness of assembling of the;
(3) the mask of smoothness, and ink discreteness;
(4) the module internal heat distribution is not uniformity;
(5) the LED optical axis direction deviation display normal direction when welding, especially into the LED optical axis direction control.
All LED screen factory, therefore, to a certain extent, there is a uniformity is not ideal. Why do LED display need point correction? Use some of the problems, the day after tomorrow, and LED display when using after a period of time, due to differences in individual LED light failure, and other external causes, evenness is bound to deteriorate further, showing it is appear on the display screen of pitting, bright spots and even Mosaic, commonly known as "flower screen" phenomenon.
The current display at millions of millions of investment, usually for advertising and business performance, etc, to display the image of high quality requirements. There are 100000 hours in the theory of life of the LED display, but in fact, a display screen after a run of about 5000 ~ 10000 hours will evenness worsened, began to grow flowers, commercial value is reduced, in 15000 ~ 20000 hours, commercial value is almost lost, caused great waste of social resources.

Whether it is or use after a period of time before they go out, point by point correction technology can let users in a very short period of time, and very low cost improved display uniformity, significantly improve the image quality. Applied to before delivery, proofreading is a means of improving quality, mean the promotion of competitiveness and expand profit margins; Applied to use after a period of time, point by point correction can extend LED display "yue eyes life", for the user to create more business value, reduce the waste of resources.

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