DRIVER MONITORING CAMERA SYSTEM

• US 20140240478A1
• Filed: 02/27/2013
• Published: 08/28/2014
• Est. Priority Date: 02/27/2013
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Nachtegall, Debbie E., Raphael, Eric L., Jobak, Frank J.
• Granted Patent: US 9,967,522 B2
• Time in Patent Office: Days
• US Class Current: 348/77
• CPC Class Codes: B60K 28/06 responsive to incapacity of driver
• CPC Class Codes: B60W 2420/403 Image sensing, e.g. optical camera
• CPC Class Codes: G06V 20/597 Recognising the driver's state or behaviour, e.g. attention or drowsiness
• CPC Class Codes: G08B 21/06 indicating a condition of sleep, e.g. anti-dozing alarms
• CPC Class Codes: H04N 7/18 Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Abstract

A driver monitoring camera system for a vehicle includes a camera system and an optical beam shaper. The camera system has an exit field of view central axis oriented more vertical than horizontal with respect to a set of orthogonal x, y and z axes, where the z-axis defines a direction line indicative of a vertical direction. The optical beam shaper is disposed in optical communication with the camera system and optically between the camera system and an operator of the vehicle. The optical beam shaper is structurally configured to direct an image of a face of an operator of the vehicle toward the exit field of view of the camera system, and is structurally configured to compress the image in the vertical direction to define a compressed image having a height to width aspect ratio of less an uncompressed height to width aspect ratio of the image.

Claims

1. A driver monitoring camera system for a vehicle, the system comprising:

a camera system comprising an exit field of view central axis oriented more vertical than horizontal with respect to a set of orthogonal x, y and z axes, the z-axis defining a direction line indicative of a vertical direction, the x and y axes defining direction lines indicative of horizontal directions, the camera system comprising a camera; and

an optical beam shaper disposed in optical communication with the camera system and optically between the camera system and an operator of the vehicle, the optical beam shaper being structurally configured to direct an image of a face of an operator of the vehicle toward the exit field of view of the camera system, the optical beam shaper being structurally configured to compress the image in the vertical direction to define a compressed image having a height to width aspect ratio of less an uncompressed height to width aspect ratio of the image.

2. The system of claim 1, wherein:

the optical beam shaper comprises a non-planar reflective surface, the non-planar reflective surface comprising a reflective surface profile structurally configured to compress the image in the vertical direction to define the compressed image.

3. The system of claim 2, wherein:

the non-planar reflective surface comprises a mirror comprising a curved reflective surface in the vertical direction, and an optically flat reflective surface in a horizontal direction defined by horizontal surface lines being oriented parallel with the y-z plane.

4. The system of claim 1, wherein the vehicle comprises a steering wheel operably connected with a steering column, and further wherein:

the camera system is disposed at least partially within the steering column.

5. The system of claim 4, wherein the steering column comprises an opening disposed within the exit field of view of the camera system, and further comprising:

an optic disposed within the opening, the optic being at least partially transparent.

6. The system of claim 5, wherein the optic comprises a lens structurally configured to transform the compressed image into a modified compressed image that is different from the compressed image.

7. The system of claim 6, wherein the modified compressed image is a smaller version of the compressed image.

8. The system of claim 6, wherein the modified compressed image has a height to width aspect ratio equal to the uncompressed height to width aspect ratio of the image

9. The system of claim 1, further comprising:

a processing module operably disposed in signal communication with the camera system;

wherein the processing module is operable to receive data representative of the image;

wherein the processing module is responsive to executable instructions which when executed by the processing module defines a state of the image; and

wherein the processing module is operable to produce a signal representative of the state of the image.

10. The system of claim 1, wherein:

the camera system comprises a camera and an optical waveguide disposed in optical communication with the camera, the exit field of view being associated with the optical waveguide.

11. The system of claim 1, wherein:

the optical beam shaper is movable from a first position to a second position, the first position enabling the optical beam shaper to direct an image of a face of an operator of the vehicle toward the field of view of the camera system, the second position interfering with the ability of the optical beam shaper to direct an image of a face of an operator of the vehicle toward the field of view of the camera system.

12. The system of claim 4, wherein:

the optical beam shaper is movable from a first operable position to a second retracted position, the optical beam shaper being at least partially disposed within the steering column when in the second retracted position.

13. The system of claim 12, wherein:

the optical beam shaper comprises a hinge operable to permit movement of the optical beam shaper from the first position to the second position.

14. A vehicle, comprising:

a chassis;

a steering column operably supported by the chassis; and

a driver monitoring camera system comprising;

a camera system comprising an exit field of view central axis oriented more vertical than horizontal with respect to a set of orthogonal x, y and z axes, the z-axis defining a direction line indicative of a vertical direction, the x and y axes defining direction lines indicative of horizontal directions, the camera system being disposed at least partially within the steering column; and

an optical beam shaper disposed in optical communication with the camera system and optically between the camera system and an operator of the vehicle, the optical beam shaper being structurally configured to direct an image of a face of an operator of the vehicle toward the exit field of view of the camera system, the optical beam shaper being structurally configured to compress the image in the vertical direction to define a compressed image having a height to width aspect ratio of less than an uncompressed height to width aspect ratio of the image.