Computer graphics processing and selective visual display system – Computer graphics processing – Attributes
Reexamination Certificate
2007-06-26
2007-06-26
Bella, Matthew C. (Department: 2624)
Computer graphics processing and selective visual display system
Computer graphics processing
Attributes
C345S590000, C345S593000, C345S594000, C345S597000
Reexamination Certificate
active
10695545
ABSTRACT:
In general, the invention relates to techniques for reconstructing color channels in a multi-channel display device. The invention may be particularly useful in reconstructing the light source spectra for the color channels of liquid crystal displays (LCD). In order to accurately model and calibrate a display device, an accurate light source spectrum estimate for each of the individual color channels is needed. In accordance with the invention, a light source spectrum can be determined for each color channel of a display based on measured emission spectra for the color channels, an inverted contrast ratio for the display, and an assumed transmission spectrum for a light valve in the display. The invention provides techniques to compensate for light leakage from adjacent color channels with regards to wavelength dependent transmissions that cause hue shifts in images reconstructed by the display device.
REFERENCES:
patent: 6611249 (2003-08-01), Evanicky et al.
patent: 6712993 (2004-03-01), Kijima et al.
patent: 2003/0147085 (2003-08-01), Mikkelsen et al.
patent: 0 539 943 (1993-05-01), None
Yasuhiro Yoshida and Yoichi Yamamoto, “Color Management of Liquid Crystal Display Placed under Light Environment,” XP-001144212, Electronics and Communications in Japan, Part 3, vol. 86, No. 7, 2003, 14 pgs.
European Search Report from EP Application No. 04024913.8-2217, dated Feb. 28, 2005, 5 pgs.
Wu, S. and Yang, D., Reflective Liquid Crystal Displays. John Wiley & Sons Ltd., p. 35-37, 2001.
Berns, Roy S., et al. “Estimating Black-Level Emissions of Computer-Controlled Displays,” Wiley Periodicals, Inc., vol. 28, No. 5, Oct. 2003.
U.S. Appl. No. 10/695,035, entitled “Display Device Light Leakage Compensation,” filed Oct. 28, 2003, by Arkady Ten.
Bella Matthew C.
Eastman Kodak Company
Rahmjoo Mike
Shumaker & Sieffert
LandOfFree
Display device color channel reconstruction does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Display device color channel reconstruction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Display device color channel reconstruction will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3814746