Why do LED displays need to be corrected point by point? Ideally, if the brightness and chromaticity of the light emitted by each pixel at any angle on the display is always the same, then the display is considered to be uniform. In the actual production process, the uniformity of the display screen will be affected by many factors, so the uniformity of the LED display without correction can not reach the ideal level, and the image quality has a significant gap compared with other flat panel display technologies. There are many factors that cause poor uniformity of the LED display, such as:
Why do LED displays need to be corrected point by point? Born defect
Discrete nature defects of LED itself
(1) LEDs provided by lamp manufacturers have differences in brightness and chromaticity
(2) There is a difference in the spatial distribution characteristics of the LED luminous intensity, which may cause inconsistencies in the luminous intensity of different LEDs at any viewing angle with respect to the attenuation value in the optical axis direction;
Many other factors introduced during the display manufacturing process:
(1) Flatness of module assembly
(2) Flatness of the box assembly
(3) The flatness of the mask and the discreteness of the ink
(4) Non-uniformity of heat distribution inside the module
(5) When the LED is soldered, the direction of the optical axis deviates from the normal direction of the display, especially the control of the optical axis of the LED?
......... Therefore, all LED screens have a problem of unsatisfactory uniformity to some extent.
Why do LED displays need to be corrected point by point? Some problems arising from the use of the day after tomorrow
When the LED display is used for a period of time, due to the difference in LED light decay and other external factors, the uniformity will be further deteriorated. The performance is that there are a lot of pitting, bright spots and even mosaics on the display screen. "Flower screen" phenomenon.
At present, the investment in display screens is tens of millions of dollars, which is mostly used in commercial advertisements and performances, and the image quality of the display screen is very high. The theoretical life of the LED display is 100,000 hours, but in fact, after a screen is operated for about 5,000 to 10,000 hours, the uniformity will deteriorate, the flower will begin to change, and the commercial value will decrease. After 15,000 to 20,000 hours, the commercial value will be Almost lost, resulting in a huge waste of social resources.
Whether it's before or after a period of time, point-by-point calibration technology allows users to dramatically increase display uniformity in a very short time and at very low cost, significantly improving image quality. Before being applied to the factory, point-by-point correction is a means of quality improvement, which means the improvement of competitiveness and the expansion of profit margin. After being used for a period of time, point-by-point correction can extend the "eye-like life" of LED displays. Users create more business value and reduce waste of resources.
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