Liquid crystal display with adaptive color

• US 7,623,105 B2
• Filed: 11/19/2004
• Issued: 11/24/2009
• Est. Priority Date: 11/21/2003
• 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: Feng, Xiao-Fan, Daly, Scott J., Pan, Hao, van Beek, Petrus J. L., Li, Baoxin, Sezan, M. Ibrahim
• Primary Examiner(s): Shalwala; Bipin
• Assistant Examiner(s): Holton; Steven E
• Application Number:
  US10/993,897
• Publication Number:
  US 20050117186A1
• Time in Patent Office: 1,831 Days
• Field of Search: 345 82-100, 345/427, 345/204, 345/690
• US Class Current: 345/88
• CPC Class Codes: G02B 27/0093 with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking
• CPC Class Codes: G06F 3/012 Head tracking input arrangements
• CPC Class Codes: G06F 3/013 Eye tracking input arrangements G06F3/015 takes precedence
• CPC Class Codes: G06F 3/04845 for image manipulation, e.g. dragging, rotation, expansion or change of colour
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/0261 in the context of movement of objects on the screen or movement of the observer relative to the screen
• CPC Class Codes: G09G 2320/028 by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 2320/0673 for control of gamma adjustment, e.g. selecting another gamma curve
• CPC Class Codes: G09G 2320/068 for control of viewing angle adjustment
• CPC Class Codes: G09G 2320/0686 with two or more screen areas displaying information with different brightness or colours
• CPC Class Codes: G09G 2354/00 Aspects of interface with display user
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• 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 17/04 for receivers
• CPC Class Codes: H04N 9/30 using solid-state colour display devices
• CPC Class Codes: H04N 9/643 Hue control means, e.g. flesh tone control
• CPC Class Codes: H04N 9/68 for controlling the amplitude of colour signals, e.g. automatic chroma control circuits H04N9/71, H04N9/73 take precedence; camera processing pipelines for controlling the colour saturation of colour signals H04N23/86

Abstract

A system for modifying images to be shown on displays that have display characteristics dependant on the angle at which a displayed image is viewed. An image may be modified by detecting the position of a viewer relative to a display and based on the detected position, correcting the image.

Claims

1. A method of modifying an image to be displayed on a display that has viewing angle dependant image characteristics comprising:

(a) receiving said image;

(b) determining automatically, without user interaction, the respective locations of a viewer, each relative to one of an automatically determined number of regions into which said display is subdivided, each said location including both a distance from the respectively associated said region of said display and an angle of incidence with respect to the respectively associated said regions of said display, where automated determination of said number of regions is based on criteria selected as a function of the determined said distance relative to the size of said display;

(c) modifying said image based upon said respective locations in such a manner that at least one of the gamma and the white point viewed by said viewer are on average shifted toward at least one of the gamma and the white point said viewer would observe at a normal viewing angle of said display.

2. The method of claim 1 wherein said modification is based upon said gamma.

3. The method of claim 1 wherein said modification is based upon said white point.

4. The method of claim 1 wherein said location of said viewer is an angular relationship between said display and the location of said viewer.

5. The method of claim 1 wherein said display is a liquid crystal display.

6. The method of claim 1 wherein said determining said location is based upon an image received by an imaging device.

7. The method of claim 6 wherein said imaging device is a camera.

8. The method of claim 6 wherein the angular relationship between said imaging device and said display is known.

9. The method of claim 8 wherein said angular relationship is normal.

10. The method of claim 6 wherein said location is based upon face detection.

11. The method of claim 6 wherein said location is based upon eye detection.

12. The method of claim 6 wherein said location is based upon gaze detection.

13. The method of claim 6 wherein said imaging device and said display do not freely move relative to one another.

14. The method of claim 1 wherein said modifying is based upon a single parameter.

15. The method of claim 1 wherein said modifying is based upon a plurality of parameters.

16. The method of claim 1 wherein said modifying is different for different pixels of said image.

17. The method of claim 1 wherein said modifying is different for different regions of said display.

18. The method of claim 1 wherein said modifying is based upon sensing a plurality of viewers.

19. The method of claim 1 wherein said modifying is based upon the anticipated distance between said viewer and said display.

20. The method of claim 1 wherein said determining is based upon multiple imaging devices.