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A Luminance Compensation Method Using Optical Sensors with Optimized Memory Size for High Image Quality AMOLED Displays

Title
A Luminance Compensation Method Using Optical Sensors with Optimized Memory Size for High Image Quality AMOLED Displays
Author
권오경
Keywords
AMOLED displays; Luminance compensation; Optical sensors; Image quality
Issue Date
2016-10
Publisher
OPTICAL SOC KOREA
Citation
JOURNAL OF THE OPTICAL SOCIETY OF KOREA, v. 20, NO. 5, Page. 586-592
Abstract
This paper proposes a luminance compensation method using optical sensors to achieve high luminance uniformity of active matrix organic light-emitting diode (AMOLED) displays. The proposed method compensates for the non-uniformity of luminance by capturing the luminance of entire pixels and extracting the characteristic parameters. Data modulation using the extracted characteristic parameters is performed to improve luminance uniformity. In addition, memory size is optimized by selecting an optimal bit depth of the extracted characteristic parameters according to the trade-off between the required memory size and luminance uniformity. To verify the proposed compensation method with the optimized memory size, a 40-inch 1920x1080 AMOLED display with a target maximum luminance of 350 cd/m(2) is used. The proposed compensation method considering a 4cr range of luminance reduces luminance error from +/- 38.64%, +/- 36.32%, and +/- 43.12% to +/- 2.68%, +/- 2.64%, and +/- 2.76% for red, green, and blue colors, respectively. The optimal bit depth of each characteristic parameter is 6-bit and the total required memory size to achieve high luminance uniformity is 74.6 Mbits.
URI
http://koreascience.or.kr/article/JAKO201634864475271.pagehttp://repository.hanyang.ac.kr/handle/20.500.11754/99133
ISSN
1226-4776; 2093-6885
DOI
10.3807/JOSK.2016.20.5.586
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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