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Research on the Spot-spot Correction Techniques for Luminance Ununiformity of LED Display

Author: ZhaoXingMei
Tutor: XiangJianYong
School: Xi'an University of Electronic Science and Technology
Course: Physical Electronics
Keywords: LED display Correction factor Camera Calibration Point positioning Luminance calculation
CLC: TN873
Type: Master's thesis
Year: 2009
Downloads: 312
Quote: 8
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Abstract


LED light-emitting diode in the production when the difference of brightness and varying degrees of brightness in the process of decay, lead to the overall brightness of the LED display is uneven , the severe impact of the display and the actual life of the display . In response to these issues , this paper based on the theory of the photometric and optical imaging , analysis based on the camera's LED screen brightness point-by-point non - uniformity correction technology implementation process ; camera selection , camera dark current , the image sensor photoelectric response non - uniformity of the experimental analysis and correction , and camera photoelectric response to the need for non-linear correction and realization method ; Finally, the display LED imaging point positioning , brightness correction factor calculated experimental analysis algorithm demonstration and implementation . This article on the brightness of the non- uniformity of about 7.8% of the LED display correction the corrected screen brightness non- uniformity is reduced to 1.2% , the display has been significantly improved .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio equipment,telecommunications equipment > Terminal equipment > Display device,the display
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