Three-dimensional mirror display system for a vehicle and method

• US 8,471,908 B2
• Filed: 10/18/2010
• Issued: 06/25/2013
• Est. Priority Date: 10/18/2010
• Status: Expired due to Fees

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Kanning, Torsten, Yang, Sam, Diehl, Peter G.
• Primary Examiner(s): Perungavoor, Sath V
• Assistant Examiner(s): PARIKH, DAKSHESH D
• Application Number:
  US12/906,387
• Publication Number:
  US 20120092498A1
• Time in Patent Office: 981 Days
• Field of Search: None
• US Class Current: 348/148
• CPC Class Codes: B60R 1/12 Mirror assemblies combined with other articles, e.g. clocks
• CPC Class Codes: B60R 2001/1253 with cameras, video cameras or video screens
• CPC Class Codes: B60R 2300/107 using stereoscopic cameras
• CPC Class Codes: H04N 13/139 Format conversion, e.g. of frame-rate or size
• CPC Class Codes: H04N 13/239 using two 2D image sensors having a relative position equal to or related to the interocular distance H04N13/243 takes precedence
• CPC Class Codes: H04N 13/31 using parallax barriers

Abstract

A display system for a vehicle includes a first camera and a second camera adapted to be mounted to the vehicle. A mirror assembly is provided having a display screen and a view divider such as a parallax barrier. A controller is operatively connected to the cameras and to the display screen and is operable to cause the recorded images to appear as a single three-dimensional image when the images are viewed through the view divider. A method of providing an image of an object that is rearward of a vehicle is also provided.

Claims

1. A display system for a vehicle comprising:

a first camera and a second camera each adapted to be mounted to the vehicle;

a mirror assembly having

a display screen; and

a view divider;

a controller operatively connecting the cameras to the display screen and operable to cause the recorded images to appear as a single, three-dimensional image when the images are viewed through the parallax barrier;

wherein the view divider is a parallax barrier;

wherein the display screen and the parallax barrier are a first predetermined distance t from one another;

wherein one of air and a transparent material occupies the first predetermined distance t;

wherein the parallax barrier has a barrier period p; and

wherein a ratio of the barrier period p to the first predetermined distance t is;

(2e−

p)/(d+t), wherein e is a predetermined intraocular distance of a viewer positioned to view the display screen through the parallax barrier, and d is a predetermined distance from the viewer to the parallax barrier.

2. The display system of claim 1, wherein the view divider is a parallax barrier;

and wherein the parallax barrier is one of electrodes on a liquid crystal panel and strips of material.

3. The display system of claim 1, in combination with the vehicle, wherein the first camera and the second camera are mounted to the vehicle to record images generally rearward of the vehicle;

and wherein the mirror assembly is a rear view mirror mounted inside of the vehicle.

4. A vehicle comprising:

a vehicle body defining an interior passenger compartment;

a first camera and a second camera each adapted to be mounted to the vehicle to record images of objects rearward of the vehicle;

a mirror assembly positioned inside of the passenger compartment and having;

a mirror positioned to provide a view of objects rearward of the vehicle;

a housing supporting the mirror;

a display screen supported by the housing forward of the mirror;

a parallax barrier positioned in the housing between the display screen and the mirror; and

transparent material positioned between the display screen and the parallax barrier;

a controller operatively connecting the cameras to the display screen and operable to divide a first image recorded by the first camera into a first plurality of segments, to divide a second image recorded by the second camera into a second plurality of segments, and to interleave the first plurality of segments with the second plurality of segments and display the interleaved segments on the display screen, thereby causing the recorded images to appear as a single, three-dimensional image when the interleaved segments are viewed through the parallax barrier;

wherein the mirror is a one-way mirror that provides the view of objects rearward of the vehicle via reflected light when the display screen does not display the interleaved segments;

wherein the display screen and the parallax barrier are a first predetermined distance t from one another;

wherein the parallax barrier has a barrier period p; and

wherein a ratio of the barrier period p to the first predetermined distance t is;

(2e−

p)/(d+t), wherein e is a predetermined intraocular distance of a viewer positioned to view the display screen through the parallax barrier, and d is a predetermined distance from the viewer to the parallax barrier.

5. The display system of claim 4, wherein the transparent material is one of air and glass.

6. The display system of claim 4, wherein the parallax barrier is one of electrodes on a liquid crystal panel and strips of material.

7. A method of providing an image of an object that is rearward of a vehicle comprising:

recording a first image of the object from a first vantage point with a first camera mounted to the vehicle;

recording a second image of the object from a second vantage point with a second camera mounted to the vehicle;

rectifying the recorded first image and the recorded second image such that both are of a uniform size;

segmenting the rectified first image and the rectified second image;

interleaving the segmented first image with the segmented second image;

resizing the interleaved images to the same size as the rectified images;

displaying the resized, interleaved images on a display screen spaced from a parallax barrier so that the displayed images appear as a three-dimensional image when viewed through the parallax barrier;

wherein the parallax barrier has a barrier period p; and

wherein a ratio of the barrier period p to the first predetermined distance t is;

(2e−

p)/(d+t), wherein e is a predetermined intraocular distance of a viewer positioned to view the display screen through the parallax barrier, and d is a predetermined distance from the viewer to the parallax barrier.

8. The method of claim 7, further comprising:

activating electrodes on a liquid crystal panel to establish the parallax barrier.

9. The method of claim 7, further comprising:

decoding a three-dimensional movie into multiple movie images;

rectifying the movie images such that all of the movie images are of a uniform size;

segmenting the rectified movie images;

interleaving the segmented movie images;

resizing the interleaved movie images to the same size as the rectified movie images;

displaying the resized, interleaved movie images on the display screen so that the displayed movie images appear as a three-dimensional movie image when viewed through the parallax barrier.