Viewing Angle Detection Technology Of LED Display Based On Curve Fitting Algorithm

For flat panel display products, viewing angle detection is a very important issue. Theviewing angle within the viewing all viewers can enjoy a better viewing experience, outsidethis range, the decrease in brightness deterioration of uniformity, the picture quality will begreatly reduced. Currently, LED display angle detection and assessment of the use of themethod based on the color analyzer. This method repeatedly mobile analytical equipment andcan detect only part of a regional perspective, large area wide viewing angle display is not theright way. Solve this problem in a more in-depth research, the LED display viewing angledetection method based on least squares curve fitting thought.For the first, introduced LED display viewing angle detection method as well as standard.This includes single die light intensity distribution detection methods as well as screenviewing angle detection means. Single die, the light intensity distribution using a dedicatedlight intensity distribution test equipment, the distance optical developed LED620lightintensity distribution tester is a brief introduction to the article. And supporting software drawInline die a discrete spatial light intensity distribution of FIG. Into the screen viewing angle ismeasured using a color analyzer, using the method specified in the SJ/T11281-2007standard measurement. Simple turntable perspective measurement. Inadequate by comparisonof several test methods above, the CCD-based light intensity data acquisition method.Secondly, introduced the multi-angle intensity data collection and extraction method, aninterlaced every other column collection methods to solve the acquisition of the sidelight-emitting spot block for the actual acquisition. And improved use of the AdaptiveTransform acquisition mode to balance the acquisition time and spot the contradictionbetween the block. And proposed the spacing intervals based data extraction method to extractvalid information in the CCD camera bitmap authentication algorithm after the preparationprocess, this method of segmentation and accurate positioning, valid information will not belost.Finally, curve fitting algorithm and its application to the viewing angle detection. Orderpolynomial fitting, and the choice of the number of sampling points is determined byexperiment. And a kind of screen, for example, collected light intensity data collected in the 27position, curve fitting algorithm to calculate each red, green and blue horizontal viewingangle value. Compared with the traditional measurement standard regional perspective, thefull-screen view of the fitting is more accurate, and can get a full-screen viewing angledistribution. More suitable for the area, large viewing angle display.