Device and method of data conversion for wide gamut displays

• US 8,599,226 B2
• Filed: 02/13/2012
• Issued: 12/03/2013
• Est. Priority Date: 06/07/2001
• Status: Expired due to Term

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Genoa Color Technologies Limited
• Inventors: Ben-Chorin, Moshe, Ben-David, Oded
• Primary Examiner(s): Dharia, Prabodh M
• Application Number:
  US13/372,022
• Publication Number:
  US 20120139913A1
• Time in Patent Office: 659 Days
• Field of Search: 345/22, 345/38, 345/76, 345/82, 345/83, 345589-591, 345600-602, 345/629, 345690-692, 382/254, 382162-167, 382218-224, 358/500, 358/518, 358/519, 358/520, 348/272, 348/506, 348638-642, 348/656, 348/458, 348/422.1
• US Class Current: 345/690
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• 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
• CPC Class Codes: H04N 1/6058 Reduction of colour to a range of reproducible colours, e.g. to ink- reproducible colour gamut
• CPC Class Codes: H04N 9/67 for matrixing camera processing pipelines for matrixing of colour signals H04N23/85

Abstract

A method and system for converting color image data (data outputting from element 202) from a, for example, three-dimensional color space format to a format usable by an n-primary display (206), wherein n is greater than or equal to 3. The system (converter 204) may define a two-dimensional sub-space having a plurality of two-dimensional positions, each position representing a set of n primary color values and a third, scaleable coordinate value for generating an n-primary display input signal (signal inputting toi display 206). Furthermore, the system may receive a three-dimensional color space input signal including out-of range pixel data not reproducible by a three-primary additive display, and may convert the data to side gamut color image pixel data suitable for driving the wide gamut color display.

Claims

1. A method of converting color image data comprising:

receiving an input signal including a plurality of input data in a three-dimensional color space format;

converting said three-dimensional color space format input color data into input data in a two-dimensional color space format; and

processing the two-dimensional color space format input data in the two-dimensional color space format to obtain respective two-dimensional color space format output data, at least a portion of said two-dimensional color space format output data being different from said two-dimensional color space format input data.

2. The method of claim 1, wherein the two-dimensional color space is the x-y chromaticity plane.

3. The method of claim 1, wherein the two-dimensional color space is the u-v chromaticity plane.

4. The method of claim 1, wherein the two-dimensional color space is the r-g chromaticity plane.

5. The method of claim 1, wherein the two-dimensional color space is the H-Y space.

6. The method of claim 1, wherein said plurality of input data in the three-dimensional color space format represents three-dimensional color image pixel data including out-of-range pixel data, said out-of-range pixel data being outside a color gamut reproducible by a three-primary additive display compliant with a color display standard, and wherein the two-dimensional color space format output data comprises display data for each of the primary colors of a wide color gamut display, at least a portion of which corresponds to at least some of said out-of-range pixel data.

7. The method of claim 6, wherein processing the two-dimensional color space format input data to obtain respective two-dimensional color space format output data comprises expanding a color gamut of the two-dimensional color space format input data, such that at least a portion of said two-dimensional color space format output data corresponds to at least some of said out-of-range pixel data.

8. The method of claim 1, further comprising based on said two-dimensional color space format output data, generating a wide color gamut input signal suitable for driving said wide gamut color display.

9. The method of claim 1, wherein the three-dimensional color space represents linear intensities.

10. The method of claim 1, wherein the three-dimensional color space represents non-linear intensities.

11. The method of claim 1, wherein processing the two-dimensional color space format input data in the two-dimensional color space to obtain respective two-dimensional color space format output data is based on a look-up-table.

12. A device for converting color image data comprising:

a converter configured to receive an input signal including a plurality of input data in a three-dimensional color space format, wherein said converter is further configured to convert said three-dimensional color space format input color data into input data in a two-dimensional color space and process the two-dimensional color space format input data in the two-dimensional color space to obtain respective two-dimensional color space format output data, at least a portion of said two-dimensional color space format output data being different from said two-dimensional color space format input data.

13. The device of claim 12, wherein the two-dimensional color space is the x-y chromaticity plane.

14. The device of claim 12, wherein the two-dimensional color space is the u-v chromaticity plane.

15. The device of claim 12, wherein the two-dimensional color space is the r-g chromaticity plane.

16. The device of claim 12, wherein the two-dimensional color space is the H-Y space.

17. The device of claim 12, wherein said plurality of input data in the three-dimensional color space format represents three-dimensional color image pixel data including out-of-range pixel data, said out-of-range pixel data being outside a color gamut reproducible by a three-primary additive display compliant with a color display standard, and wherein the two-dimensional color space format output data comprises display data for each of the primary colors of a wide color gamut display, at least a portion of which corresponds to at least some of said out-of-range pixel data.

18. The device of claim 17, wherein said converter is further configured to process the two-dimensional color space format input data to obtain respective two-dimensional color space format output data by expanding a color gamut of the two-dimensional color space format input data, such that at least a portion of said two-dimensional color space format output data corresponds to at least some of said out-of-range pixel data.

19. The device of claim 12, wherein said converter is further configured, based on said two-dimensional color space format output data, to generate a wide color gamut input signal suitable for driving said wide gamut color display.

20. The device of claim 12, wherein the three-dimensional color space represents linear intensities.

21. The device of claim 12, wherein the three-dimensional color space represents non-linear intensities.

22. The device of claim 12, wherein said converter is configured to process the two-dimensional color space format input data in the two-dimensional color space to obtain respective two-dimensional color space format output data based on a look-up-table.