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If the pure brightness correction technology as a 1.0 point correction, color correction technology will be 2.0 times of point by point correction. As we know, the original point correction mainly solve the problem of LED display screen, Mosaic and so on, and the root of these problems lies in the LED display on each lamp brightness differences, therefore, need to full screen brightness data are collected, and the mean square error, the data calculated by the LED display of each lamp which can adjust the differences, in order to realize the whole screen LED lights at the same brightness, the screen brightness uniformity of reached the best level.
Initial point calibration device is based on the luminance measurement, by CCD to collect the whole screen point
each lamp brightness value, and the process also must first to selection of calibration equipment, and in the process of using and calibration on a regular basis to ensure the accuracy of collected data. The first generation of point by point calibration equipment is often shape is relatively large, need to configure a prime lens and telephoto zoom lens, single box is mainly used in the production line correction and workshop the whole screen calibration.
With the promotion of point by point correction technology, calibration devices are increasingly applied to the LED display engineering installation site, the point correction has become a process with the end of the LED display project, and often determines whether the customer timely payment or ZhiBaoJin, so point correction demand remains from the LED display manufacturers. And relatively complex environment engineering field calibration, calibration difficulty is high, often face arc screen, special-shaped screen, shade trees, telecommunications, lever block, such as street lamp shade acquisition of reservation not ideal, but also often encounter their inconvenient, bad communication condition and so on. Therefore, division d optimal also specifically for field engineering developed a new generation of portable point correction system, but the main user requirements is mainly to solve the problem in the brightness difference, therefore, we have this system comes down to 1.5 times.
Point by point correction demand from LED display manufacturers and users, recently, more and more customers to solve the problem of a mixture of different batch lamp or module, display screen before installation to the scene needs and match to the same quality problem domain space, will display the correction to the SRGB color gamut space/NTSC standard color space problem of quality. And these problems, we collectively known as color correction. Color correction will be limited to the LED display off color, Mosaic, etc, and the LED display color reduction degree ascend to a higher level, therefore, we have reason to believe that, with a 2.0 era point correction will usher in a broader space for development.