Light sensitive display

• US 20080055496A1
• Filed: 10/26/2007
• Published: 03/06/2008
• Est. Priority Date: 05/23/2002
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Abileah, Adiel, Green, Pat, Boer, Willem
• Granted Patent: US 7,880,819 B2
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13312 Circuits comprising photodetectors for purposes other than feedback
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/1362 Active matrix addressed cells G02F1/134336, G02F1/134363 take precedence
• CPC Class Codes: G06F 2203/04109 FTIR in optical digitiser, i.e. touch detection by frustrating the total internal reflection within an optical waveguide due to changes of optical properties or deformation at the touch location
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/042 by opto-electronic means
• CPC Class Codes: G09G 2300/0809 Several active elements per pixel in active matrix panels
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A light sensitive display.

Claims

1. A light sensitive display system comprising:

(a) said display selectively causing pixels to provide light during subsequent frames;

(b) a plurality of light sensitive elements located within said display;

(c) a first amount of additional light provided to said light sensitive elements during at least one of said subsequent frames;

(d) a second amount of said additional light selectively provided to said light sensitive elements during at least one other of said subsequent frames, wherein said first and second additional light are different;

(e) said display system determining the location of said additional light on said display based upon sensing a portion of said first and second additional light.

2. The display of claim 1 wherein said first amount of said additional light is greater than said second amount of said additional light.

3. The display of claim 1 wherein said subsequent frames are sequential frames.

4. A method of sensing with a display comprising:

(a) a plurality of light sensitive elements located within said display;

(b) modifying an amount of additional light provided to said light sensitive elements during multiple frames;

(c) system determining the location of said additional light on said display based upon sensing said additional light.

5. The display of claim 4 wherein said first amount of said additional light is greater than said second amount of said additional light.

6. The display of claim 4 wherein said multiple frames are non-sequential.

7. The display of claim 4 wherein said multiple frames are sequential.

8. The display of claim 4 wherein said modifying includes providing no-light.

9. A liquid crystal device comprising:

(a) a front electrode layer;

(b) a rear electrode layer comprising a plurality of pixel electrodes, wherein a first plurality of said pixel electrodes is associated with blue, a second plurality of said pixel electrodes is associated green, and a third plurality of said pixel electrodes is associated with red;

(c) a liquid crystal material located between said front electrode layer and said rear electrode layer;

(d) a plurality of light sensitive elements located within said display wherein each of said light sensitive elements corresponds with a selected one of said pixel electrodes, wherein at least one of;

(i) a greater number of said light sensitive elements are associated with said blue pixel electrodes, than said green pixel electrodes;

(ii) a greater number of said light sensitive elements are associated with said blue pixel electrodes, than said red pixel electrodes;

(iii) a greater number of said light sensitive elements are associated with said blue pixel electrodes, than non-blue said pixel electrodes.

10. The device of claim 9 wherein a greater number of said light sensitive elements are associated with said blue pixel electrodes, than said green pixel electrodes.

11. The device of claim 9 wherein a greater number of said light sensitive elements are associated with said blue pixel electrodes, than said red pixel electrodes.

12. The device of claim 9 wherein a greater number of said light sensitive elements are associated with said blue pixel electrodes, than non-blue said pixel electrodes.