Camera placed behind a display with a transparent backlight

• US 8,022,977 B2
• Filed: 10/16/2006
• Issued: 09/20/2011
• Est. Priority Date: 10/17/2005
• Status: Expired due to Fees

• Current Assignee: I2IC Corporation
• Original Assignee: I2IC Corporation
• Inventors: Ganapathy, Balaji, Kanade, Udayan
• Primary Examiner(s): Misleh; Justin P
• Application Number:
  US11/549,851
• Publication Number:
  US 20070120879A1
• Time in Patent Office: 1,800 Days
• Field of Search: None
• US Class Current: 348/14.07
• CPC Class Codes: H04N 7/144 camera and display on the same optical axis, e.g. optically multiplexing the camera and display for eye to eye contact

Abstract

A method and combined video display and camera system are disclosed. In one embodiment, the system comprises a first sheet and a second sheet oriented parallel to the first sheet, the second sheet including a light diffuser. A light source is placed along an edge of the second sheet, wherein the second sheet diffuses light generated by the light source. One or more cameras are placed behind the second sheet to capture an image through the second sheet and the first sheet.

Claims

1. A video display and camera system, comprising:

a first sheet;

a second sheet oriented parallel to the first sheet, the second sheet including a light diffuser;

a light source placed along a first face of the second sheet, the first face not being a large face of the second sheet, such that light from the light source primarily enters the second sheet through the first face and the light from the light source that is not diffused by the light diffuser suffers total internal reflection within the second sheet; and

one or more cameras placed behind the second sheet to capture an image through the second sheet and the first sheet.

2. The system of claim 1, further comprising a mirror between the second sheet and the one or more cameras, wherein the mirror is substantially transparent in an area in front of the one or more cameras.

3. The system of claim 2, wherein the second sheet includes a concentration of light scattering particles in the area in front of the one or more cameras, which is greater than the concentration of light scattering particles in an adjoining area of the second sheet which is not in front of the one or more cameras.

4. The system of claim 1, wherein the one or more cameras are configured to capture the image during a capture period and not capture the image during a display period.

5. The system of claim 4, wherein the second sheet includes light dispersing particles that minimally scatter and absorb light traveling towards the face of the second sheet during both the display period and the capture period.

6. The system of claim 4, wherein the capture period and the display period overlap with each other.

7. The system of claim 4, wherein the light source is configured to emit light during the display period and not emit light during the capture period.

8. The system of claim 7, wherein the light source is one of a fluorescent light and one or more LEDs.

9. The system of claim 7, further comprising a light blocking mechanism that blocks the light from the light source during the capture period.

10. The system of claim 1, wherein the first sheet is a display and the second sheet is a backlight.

11. The system of claim 1, wherein the image captured by the one or more cameras is displayed on the first sheet.

12. The system of claim 1, further comprising an image corrector that corrects defects in the image caused by the second sheet.

13. The system of claim 1, further comprising an image corrector that corrects defects in the image caused by the first sheet.

14. The system of claim 1, further comprising an element that diffuses light located between the first sheet and the second sheet, wherein the element that diffuses light is configured to be transparent when the one or more cameras is capturing the image.

15. The system of claim 1, further comprising a user perceivable capture indicator that indicates when the one or more cameras are capturing the image.