Display-camera system

Patent metadata

Field	Value
Publication number	US-2015035936-A1
Application number	US-201313956077-A
Country	US
Kind code	A1
Filing date	Jul 31, 2013
Priority date	Jul 31, 2013
Publication date	Feb 5, 2015
Grant date	—

Abstract

According to an example, a display-camera system includes a transparent display panel and a transparent backlight panel. Light sources emit light into the edge of the transparent backlight panel. A first polarizer, between the light sources and the edge of the transparent backlight panel, polarizes the light emitted from the light sources and the transparent backlight panel directs the polarized light towards the transparent display panel. A camera, adjacent a back surface of the transparent backlight panel captures an image of a scene through the transparent display panel and the transparent backlight panel.

First claim

What is claimed is:

1 . A display-camera system comprising:
a transparent display panel having a front surface to display images to a viewer and a back surface; a transparent backlight panel having a front surface, a back surface and an edge, wherein the front surface of the transparent backlight panel is adjacent the back surface of the transparent display panel; light sources to emit light into the edge of the transparent backlight panel; a first polarizer, between the light sources and the edge of the transparent backlight panel, to polarize the light emitted from the light sources, wherein the transparent backlight panel is to direct the polarized light entering the edge of the transparent backlight panel towards the back surface of the transparent display panel; and a camera, adjacent the back surface of the transparent backlight panel, to capture an image of a scene through the transparent display panel and the transparent backlight panel.

2 . The display-camera system of claim 1 , comprising:
a camera filter between the back surface of the transparent backlight panel and the camera, wherein the camera filter is to filter the light emitted by the light sources and to pass other light to capture the image of the scene.

3 . The display-camera system of claim 2 , wherein the light sources are narrow band light sources and the camera filter includes a filter that matches wavelengths of the narrow band light sources to block the light emitted by the narrow band light sources.

4 . The display-camera system of claim 1 , wherein the light sources and the camera are multiplexed to switch the camera on to capture the image of the scene when the light sources are off and do not emit the light, and to switch the camera off to stop capturing images of the scene when the light sources are on and emit the light.

5 . The display-camera system of claim 1 , comprising:
a color filter array including a set of filters for each colored subpixel in the transparent display panel, wherein each set of filters only passes wavelengths of the corresponding colored subpixels.

6 . The display-camera system of claim 5 , wherein each filter for each subpixel comprises a layer with dual notch properties that are able to pass light for the subpixel and block other wavelengths of the light emitted by the light sources.

7 . The display-camera system of claim 5 , wherein each filter for each subpixel comprises multiple layers, and each layer blocks wavelengths of the light emitted by the light sources that are not for a color of the corresponding subpixel.

8 . The display-camera system of claim 5 , comprising a second polarizer to polarize light emitted from the front surface of the transparent display panel, and the color filter array is between the front surface of the transparent display panel and the second polarizer.

9 . The display-camera system of claim 1 , comprising micro-optic structures in the transparent backlight panel to direct the light emitted from the light sources towards the back surface of the transparent display panel.

10 . The display-camera system of claim 1 , comprising micro-optic structures in the transparent backlight panel to direct the light emitted from the light sources for a colored subpixel towards the colored subpixel in the transparent display panel.

11 . The display-camera system of claim 1 , wherein the transparent display panel is a liquid crystal display.

12 . A display-camera system comprising:
a liquid crystal display (LCD) panel; light sources to illuminate the LCD panel; a transparent backlight panel adjacent the LCD panel; a first polarizer adjacent an edge of the backlight to polarize light emitted from the light sources, wherein the transparent backlight is to direct the polarized light entering the edge of the backlight towards a back surface of the LCD panel; a second polarizer adjacent a front surface of the LCD panel to polarize light emitted from the LCD panel; a camera, adjacent a back surface of the transparent backlight panel, to capture an image of a scene through the LCD panel and the transparent backlight panel, wherein to capture the image, the camera is to sense light from the scene, and the light from the scene sensed by the camera does not pass through the first polarizer.

13 . The display-camera system of claim 12 , comprising:
a camera filter between the back surface of the transparent backlight panel and the camera, wherein the camera filter is to filter the light emitted by the light sources and to pass other light to capture the image of the scene.

14 . The display-camera system of claim 13 , wherein the camera captures the image of the scene while content is displayed on the LCD panel.

15 . A method of displaying content and capturing images in a display-camera system, the method comprising:
emitting light from light sources towards an edge of a transparent backlight panel; polarizing the light prior to the light entering the edge of the transparent backlight panel; directing the polarized light through the backlight panel and towards a transparent display panel; displaying content on the transparent display panel; and capturing images of a scene in front of the display panel through the transparent display panel and through the transparent backlight panel.

Assignees

• Hewlett Packard Development Co
• Hewlett Packard Development Co

Inventors

• Robinson Ian N
• Tan Kar-Han
• Fiorentino Marco
• Fattal David A

Classifications

• H04N7/15

  Conference systems · CPC title

• H04N5/2254

  Electricity · mapped topic

• H04N5/7408

  Direct viewing projectors, e.g. an image displayed on a video CRT or LCD display being projected on a screen · CPC title

• H04N7/144 Primary

  camera and display on the same optical axis, e.g. optically multiplexing the camera and display for eye to eye contact · CPC title

• H04N5/2252

  Electricity · mapped topic