Don C Moore

US Patent:

6933967, Aug 23, 2005

Filed:

Sep 9, 2003

Appl. No.:

10/659447

Inventors:

Paul David Doyle - San Marcos CA, US
Rafael Calderon - San Diego CA, US
Matthew C. Boyko - San Francisco CA, US
Roy Bragadeste - Round Rock TX, US
Don Moore - Renton WA, US
Mike McKay - Shoreline WA, US
Karl Lang - Madison WI, US
Andrew Bryant - San Diego CA, US
Martin Kolinek - Bellevue WA, US

Assignee:

Sony Corporation - Tokyo
Sony Electronics Inc. - Park Ridge NJ

International Classification:

H04N017/02

US Classification:

348189, 348191

Abstract:

A color calibration system includes a visual display terminal (VDT), a color calibration sensor optically coupled to the VDT, and a computer processing unit (CPU) electrically coupled to the VDT and the color calibration sensor. The VDT has a display screen and a plurality of color channels, each color channel having an intensity input, a bias input, and a gain input. The VDT produces an image on the display screen responsive to the intensity input. The color calibration sensor provides values responsive to the chromaticity and luminance of a test patch portion of the image on the display screen. The CPU performs calibration of the VDT including setting the bias of each color channel to reduce the difference between a target black point and the test patch with the intensity input at a minimum value for each color channel.