Systems and Methods for Selecting a White Point for Image Displays

• US 20080030518A1
• Filed: 10/16/2007
• Published: 02/07/2008
• Est. Priority Date: 04/09/2004
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Clairvoyante, Inc. (Samsung Electronics Co. Ltd.)
• Inventors: Higgins, Michael, Brown Elliott, Candice
• Granted Patent: US 7,864,188 B2
• Time in Patent Office: Days
• US Class Current: 345/589
• CPC Class Codes: G09G 5/02 characterised by the way in which colour is displayed details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607

Abstract

Several embodiments of the present application disclose techniques, systems and methods for changing or rendering input image data that may assume a first white point for a given display into image data to be rendered under a second—assumed, desired or measured—white point of the display.

Claims

1. A method for changing the chromaticity triangle calculations for input image data, the steps of said method comprising:

converting input image data to a first color space, said first color space having substantially the same white point as the display;

calculating the chromaticity triangle of the converted input image data.

2. The method of claim 1 wherein said input image data is in sRGB format.

3. The method of claim 2 wherein said sRGB input values are converted into values that have substantially the same white point as the display.

4. The method of claim 3 wherein said converted values have their chromaticity triangles calculated.

5. A method of calculating chromaticity triangles of input image data, the steps of said method comprising:

constructing a plurality of Boolean tests to determine the chromaticity triangle of any input image data;

applying a correction for said Boolean tests depending upon the desired white point of the display.