Led has become more and more popular, but Led display correction is the industry has been one of the more controversial subject. Below we LED display of point by point correction for a simple analysis:
First of all, it is generally thought that, point by point correction need to use special drive chip and led testing instrument < http://www.semilamp.com >, actually, as long as the control system support, the generic driver can also realize chip point by point correction. The real point by point correction the necessary conditions are the following three points:
1, high precision, high efficiency light brightness acquisition equipment
2, can realize the control point by point correction system
3, both of the above data docking.
Point by point correction can be divided into two steps:
1, accurate measurement of each star light/chip brightness, get the point by point correction coefficient.
2, will correct coefficient feedback to the control system data, realize the precise point by point drive control.
Drive control point by point already realize, on the market general control system are already have this function. But to millions of light data collection, some control system manufacturers developed tools, these collection method and other systems are mutually exclusive. So caused by DianJiao with control system is bound, the integration of understanding the erroneous zone.
At present, common collection method of point collection, organic desktop digital camera collection and, import equipment acquisition and high brightness measuring instrument SV-1 several system collection, including SV-1 system has achieved with the market is that most of the control system of general data docking, display manufacturers can completely free choice drive chip, control system, to complete the efficient and point by point correction.
Secondly, people think of point correction calibration point by point to the shade of the test, actually, color gamut space conversion point by point of bright color to correction coefficient, but does not have to point the color measurement, only chromaticity uniformity correction had to color measurement point by point. Because each pixel in the brightness of the RGB different proportion, therefore, color gamut space conversion of each pixel to provide 3 by 3 bright color correction coefficient, but bright color correction coefficient calculation only need to provide the color space of the x, y coordinates, target color space of the x, y coordinates, and every light the brightness of the RGB value, they can get, does not need to point to color measurement.
Note that the need to control system calibration chromaticity support. With bright color correction data, also need to control system can correct reading and effective use, can we truly achieve the bright color correction. And for the control system of color correction gray-scale depth, the fai gray, computing resources, storage resources are put forward higher request.
It is in the DianJiao by existing screen quality, and on the basis of display quality greatly enhance the effective means, by efficiency, cost and after operation, maintainability, and limit in the domestic industry to widely, practical, and also have caused some the confusion of understanding. Based on practice, to some common pitfalls to concepts to clarify, the hope can promote the domestic industry by DianJiao is the practical process, enhance China LED display industry's international competitiveness.