NDLI: Color quality inspection and compensation for color LED display modules

Content Provider	IEEE Xplore Digital Library
Author	Ming-Jong Tsai Shu-Huai Chang Chia-Liang Lee Chia-Te Chou
Copyright Year	2011
Description	Author affiliation: Graduate Institute of Automation and Control, National Taiwan University of Science and Technology, Taipei, Taiwan, 106, R.O.C (Ming-Jong Tsai; Shu-Huai Chang; Chia-Liang Lee; Chia-Te Chou)
Abstract	The paper presents an automated color inspection and compensation solutions for color LED modules which are main components of a color LED display panel. Initially, a self-developed color optical sensing module and a colorimeter were used to measure the colors of LED pixels. After the color matching functions from the collected data was corrected by least-squares approximation method, the calibrated measured sensing module was applied to inspect the color characteristics of LED modules. And the chrominance and luminance data are well analyzed to perform a white light chrominance correction and luminance uniformity compensation for LED display modules. Some 2R1G1B LED modules (16×16 LEDs) from a local industry were verified in this study. The experimental results from the central 8×8 LEDs show that the average color difference of a target D65 white light with a chrominance of (0.1978, 0.4683) by using a 2R1G1B LED module is about 0.027006 before compensation, but the average color difference can be reduced to 0.003474 after it was compensated by using the proposed method. Meanwhile, the luminance difference was also reduced to less than 3.541%.
Starting Page	1720
Ending Page	1725
File Size	694580
Page Count	6
File Format	PDF
ISBN	9781457703058
ISSN	21601348
e-ISBN	9781457703089
DOI	10.1109/ICMLC.2011.6016985
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-10
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image color analysis Light emitting diodes Brightness Testing Matched filters Sensors Machine learning White Light Chrominance Correction Light Emitting Diodes module (LEDs) Color Measurement Compensated Look Up Table (CLUT) Least-Squares Approximation RGB Color Sensor
Content Type	Text
Resource Type	Article

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