System and method for adjusting display based on detected environment

• US 8,786,585 B2
• Filed: 02/18/2011
• Issued: 07/22/2014
• Est. Priority Date: 02/22/2010
• Status: Active Grant

• Current Assignee: Dolby Laboratories Licensing Corporation (Dolby Laboratories Incorporated)
• Original Assignee: Dolby Laboratories Licensing Corporation (Dolby Laboratories Incorporated)
• Inventors: Longhurst, Peter W., Kozak, Eric
• Primary Examiner(s): Chow, Van
• Application Number:
  US13/578,250
• Publication Number:
  US 20120320014A1
• Time in Patent Office: 1,250 Days
• Field of Search: 345/207
• US Class Current: 345/207
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2360/144 the light being ambient light
• 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

In one embodiment the present invention includes a method that adjusts a display device according to a display environment. The method includes sensing the display environment of the display device and generating environment data that corresponds to the display environment. The environment data includes color data. The method further includes adjusting a color appearance model according to the color data, generating a control signal according to the color appearance model having been adjusted, and controlling a backlight of the display device according to the control signal. In this manner, a viewer perceives the images displayed by the display device in the manner intended by the content creator, because the adjustments to the color appearance model compensate for the viewer'"'"'s physiological response to the display environment.

Claims

1. A method of adjusting a display device according to a display environment, comprising:

sensing the display environment of the display device;

wherein sensing the display environment comprises sensing the display environment with a first sensor and a second sensor;

generating environment data that corresponds to the display environment, wherein the environment data includes color data;

wherein the color data comprises first color data and second color data corresponding to the first sensor and the second sensor respectively;

adjusting a color appearance model according to the color data;

wherein adjusting the color appearance model according to the color data comprises;

adjusting the color appearance model according to the first color data and the second color data as a function of distance to the first sensor and to the second sensor;

generating a control signal according to the color appearance model having been adjusted;

controlling a backlight of the display device according to the control signal; and

storing user white point data that differs from reference white point data, wherein the color appearance model is configured to receive reference environment data and the user white point data, and wherein the adjusted color appearance model is configured to generate a target white point data that corresponds to the control signal, further comprising;

scaling a front modulator according to the target white point when the target white point exceeds a threshold; and

scaling the front modulator according to the threshold when the target white point does not exceed the threshold.

2. The method of claim 1, further comprising:

generating light from the backlight in accordance with the backlight being controlled by the control signal.

3. The method of claim 1, wherein the color data includes an adapting white point.

4. The method of claim 1, wherein the color data includes an adapting white point having an X component, a Y component and a Z component.

5. The method of claim 1, wherein the environment data further includes adapting luminance data (La), further comprising:

adjusting the color appearance model according to the adapting luminance data.

6. The method of claim 1, further comprising:

adjusting the color appearance model according to relative luminance data (Yb), wherein the environment data does not include the relative luminance data.

7. The method of claim 1, further comprising:

adjusting the color appearance model according to surround luminance data (S), wherein the environment data does not include the surround luminance data.

8. The method of claim 1, wherein the color appearance model corresponds to a CIECAM02 (International Commission on Illumination 2002 Color Appearance Model).

9. The method of claim 1, wherein sensing the display environment comprises:

sensing a color of the display environment.

10. The method of claim 1, wherein adjusting the color appearance model according to the color data comprises:

adjusting a whitepoint achromatic response (Aw) of the color appearance model according to the color data.

11. The method of claim 1, wherein adjusting the color appearance model according to the color data comprises:

adjusting a degree of adaptation (D) of the color appearance model according to the color data.

12. The method of claim 1, wherein adjusting the color appearance model according to the color data comprises:

adjusting an induction factor (n) of the color appearance model according to the color data.

13. The method of claim 1, wherein adjusting the color appearance model according to the color data comprises:

adjusting a luminance level adaptation factor (Fl) of the color appearance model according to the environment data.

14. The method of claim 1, further comprising:

receiving input video data; and

controlling a front modulator according to the input video data such that the backlight and the front modulator display an image corresponding to the input video data.

15. The method of claim 1, wherein the backlight comprises a back modulator, further comprising:

receiving input video data;

controlling the back modulator and a front modulator according to the input video data such that the back modulator and the front modulator display an image corresponding to the input video data.

16. A method of adjusting a display device according to a display environment, comprising:

sensing the display environment of the display device;

wherein sensing the display environment comprises sensing the display environment with a first sensor and a second sensor;

generating environment data that corresponds to the display environment, wherein the environment data includes color data;

wherein the color data comprises first color data and second color data corresponding to the first sensor and the second sensor respectively;

adjusting a color appearance model according to the color data;

wherein adjusting the color appearance model according to the color data comprises;

adjusting the color appearance model according to the first color data and the second color data as a function of distance to the first sensor and to the second sensor;

generating a control signal according to the color appearance model having been adjusted;

controlling a backlight of the display device according to the control signal; and

storing user white point data that differs from reference white point data, wherein the color appearance model is configured to receive reference environment data and the user white point data, and wherein the adjusted color appearance model is configured to generate a target white point data that corresponds to the control signal for further adjustments of the display device when the target point exceeds a threshold.

17. The method of claim 16, wherein the method further comprises adjusting a modulator of the display device based on the target white point.

18. The method of claim 17, wherein the method further comprises adjusting a modulator of the display device by a first adjustment technique when the target white point exceeds a threshold and a second adjustment technique when the target white point does not exceed the threshold.

19. The method of claim 16, wherein the further adjustments comprise scaling a modulator of the display device based on the target white point.