Methods and systems for surround-specific display modeling

• US 7,826,681 B2
• Filed: 02/28/2007
• Issued: 11/02/2010
• Est. Priority Date: 02/28/2007
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Laboratories of America Incorporated (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Kerofsky, Louis Joseph, Daly, Scott J.
• Primary Examiner(s): Werner; Brian P
• Application Number:
  US11/680,539
• Publication Number:
  US 20080208551A1
• Time in Patent Office: 1,343 Days
• Field of Search: None
• US Class Current: 382/274
• CPC Class Codes: G09G 2320/0238 Improving the black level
• CPC Class Codes: G09G 2320/0276 for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• CPC Class Codes: G09G 2320/066 for control of contrast
• CPC Class Codes: G09G 2320/0673 for control of gamma adjustment, e.g. selecting another gamma curve
• CPC Class Codes: G09G 2360/144 the light being ambient light
• CPC Class Codes: G09G 3/2007 Display of intermediate tones
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336

Abstract

Embodiments of the present invention comprise systems and methods for surround-specific display modeling in which the brightness of a display is varied based on a perceptual brightness model that is expressed as a function of the illumination level that surrounds a display as it is being perceived by a viewer.

Claims

1. A method for generating a surround-characteristic-specific display model, said method comprising:

a) receiving a surround light characteristic;

b) receiving perceptual reference data comprising at least one of a black point, a white point, and a tone scale;

c) receiving model property data;

d) generating a perceptual brightness model based on said perceptual reference data and said model property data, said perceptual brightness model relating said perceptual reference data as a function of surround luminance; and

e) generating a display model based on said perceptual brightness model, said display model relating backlight luminance of a display as a function of said surround light characteristic; and

f) using said display model to drive a backlight of a display.

2. A method as described in claim 1 wherein said surround light characteristic comprises a light intensity incident on a display.

3. A method as described in claim 1 wherein said surround light characteristic is calculated from a light intensity measurement.

4. A method as described in claim 1 wherein said perceptual reference data comprises display model data for a specific reference surround luminance value.

5. A method as described in claim 1 wherein said model property data indicates at least one property of a perceptual brightness model.

6. A method as described in claim 1 wherein said model property data indicates whether said perceptual brightness model comprises elements related to a black level, a white point and a tonescale process.

7. A method as described in claim 1 wherein said display model comprises elements related to at least one of a black level, a white point and a tonescale process.

8. A method as described in claim 1 wherein said display model comprises data for configuring a display backlight illumination level.

9. A method as described in claim 1 wherein said display model comprises data for adjusting an image value to a white point.

10. A method as described in claim 1 wherein said display model comprises a tonescale operation for adjusting a plurality of image values.

11. A system for generating a surround-characteristic-specific display model, said system comprising:

a) a mechanical light receptor for receiving a surround light characteristic related to a display;

b) a reference receiver for receiving perceptual reference data comprising at least one of a black point, a white point, and a tone scale;

c) a model receiver for receiving model property data;

d) a perceptual model generator for generating a perceptual brightness model based on said perceptual reference data and said model property data, said perceptual brightness model relating said perceptual reference data as a function of surround luminance; and

e) a display model generator for generating a display model based on said perceptual brightness model, said display model relating backlight luminance of a display as a function of said surround light characteristic.

12. A method as described in claim 11 wherein said mechanical light receptor is a light sensor capable of measuring a light intensity incident on said display.

13. A method as described in claim 11 wherein said mechanical light receptor receives a surround light characteristic calculated from a light intensity measurement.

14. A method as described in claim 11 wherein said perceptual reference data comprises display model data for a specific reference surround luminance value.

15. A method as described in claim 11 wherein said perceptual reference data comprises at least one of a black level, a white point and a tonescale process for a specific reference surround luminance value.

16. A method as described in claim 11 wherein said model property data indicates at least one property of a perceptual brightness model.

17. A method as described in claim 11 wherein said display model comprises elements related to at least one of a black level, a white point and a tonescale process.

18. A method as described in claim 11 wherein said display model comprises data for configuring a display backlight illumination level.