Apparatus for digital projection using holographic techniques

• US 9,684,168 B2
• Filed: 11/27/2013
• Issued: 06/20/2017
• Est. Priority Date: 11/27/2013
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Huntzicker, Fred W., Nickolaou, James N.
• Primary Examiner(s): Doak, Jennifer L.
• Application Number:
  US14/091,618
• Publication Number:
  US 20150146270A1
• Time in Patent Office: 1,301 Days
• Field of Search: 345 7- 9, 345418
• CPC Class Codes: G02B 2027/0105 Holograms with particular structures
• CPC Class Codes: G02B 26/00 Optical devices or arrangements for the control of light using movable or deformable optical elements control of light by modification of the optical properties of the media of the elements involved therein G02F1/00
• CPC Class Codes: G02B 27/0103 comprising holographic elements
• CPC Class Codes: G03H 1/26 Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
• CPC Class Codes: G03H 2001/262 not in optical contact G03H1/30 takes precedence
• CPC Class Codes: G03H 2001/2655 Time multiplexing, i.e. consecutive records wherein the period between records is pertinent per se
• CPC Class Codes: G03H 2227/03 Means for moving one component G03H1/0476, G03H2001/2695 take precedence

Abstract

An apparatus for generating and displaying a projected digital image includes an actuator, a holographic encoded medium with a holographic pattern, a light source, and a controller. The holographic encoded medium is disposed in operable communication with the actuator. The light source is configured to produce a coherent light disposed in optical communication with the holographic encoded medium. The controller is operable to control synchronization of the coherent light from the light source with a position of the holographic encoded medium as driven by the actuator to produce the projected digital image on a projection surface based on directing the coherent light to different portions of the holographic pattern at different times.

Claims

1. An apparatus for generating and displaying a projected digital image, the apparatus comprising:

an actuator;

a holographic encoded medium comprising a holographic pattern distributed between a plurality of holographic elements of the holographic encoded medium, the holographic encoded medium disposed in operable communication with the actuator;

a light source configured to produce a coherent light disposed in optical communication with the holographic encoded medium; and

a controller operable to control synchronization of pulsation of the coherent light from the light source with a position of the holographic encoded medium on a per holographic element basis, the holographic encoded medium driven in motion by the actuator to produce the projected digital image on a projection surface based on directing the coherent light to different portions of the holographic pattern at different times in a predetermined sequence of illumination of the holographic encoded medium by the coherent light that reflects/refracts the coherent light onto the projection surface, wherein directing the coherent light to different portions of the holographic pattern at different times comprises directing the coherent light from the light source at a first time to synchronize pulsation of the coherent light with a first portion of the holographic encoded medium and directing the coherent light from the light source at a second time to synchronize pulsation of the coherent light with a second portion of the holographic encoded medium based on the actuator driving the holographic encoded medium in motion.

2. The apparatus of claim 1, wherein the holographic elements have a non-uniform size with irregular shapes configured to match one or more contours of the projection surface.

3. The apparatus of claim 1, wherein the light source comprises a laser, and the controller is operable to pulse control the laser to control synchronization of the coherent light with the holographic encoded medium.

4. The apparatus of claim 1, wherein the actuator and the controller are operable in response to a detected state change of a vehicle.

5. The apparatus of claim 1, wherein the holographic encoded medium is an optical disk, and the actuator is a motor operable to spin the optical disk.

6. The apparatus of claim 1, wherein the actuator is a piezoelectric device operable to vibrate the holographic encoded medium.

7. The apparatus of claim 1, wherein the projected digital image comprises a non-homogeneous light pattern, an outline of a geometric shape, a logo, an alphanumeric character, or any combination of the foregoing light patterns.

8. The apparatus of claim 1, wherein the holographic pattern and the controller are configured to produce the projected digital image as an animated image comprising light patterns changing over a period of time.

9. The apparatus of claim 1, wherein the apparatus is disposed in a vehicle and the projection surface comprises at least one of a windshield of the vehicle, a rear view mirror of the vehicle, a side view mirror of the vehicle, an interior surface of the vehicle, or a surface exterior to the vehicle.

10. A method for generating and displaying a projected digital image from an apparatus, comprising:

enabling an actuator to move a holographic encoded medium comprising a holographic pattern distributed between a plurality of holographic elements of the holographic encoded medium, the holographic encoded medium disposed in operable communication with the actuator;

directing a coherent light from a light source at a first time to synchronize pulsation of the coherent light with a first portion of the holographic encoded medium on a per holographic element basis as driven in motion by the actuator;

directing the coherent light from the light source at a second time to synchronize pulsation of the coherent light with a second portion of the holographic encoded medium on the per holographic element basis as driven in motion by the actuator; and

producing the projected digital image on a projection surface based on directing pulsation of the coherent light to different portions of the holographic pattern at different times in a predetermined sequence of illumination of the holographic encoded medium by the coherent light that reflects/refracts the coherent light onto the projection surface.

11. The method of claim 10, wherein the holographic elements have a non-uniform size with irregular shapes configured to match one or more contours of the projection surface.

12. The method of claim 10, wherein the light source comprises a laser, and the method further comprises pulse controlling the laser to control synchronization of the coherent light with the holographic encoded medium.

13. The method of claim 10, wherein producing the projected digital image on the projection surface is performed responsive to a detected state change of a vehicle.

14. The method of claim 10, wherein the holographic encoded medium is an optical disk, and the actuator is a motor operable to spin the optical disk.

15. The method of claim 10, wherein the actuator is a piezoelectric device operable to vibrate the holographic encoded medium.

16. The method of claim 10, wherein the projected digital image comprises a non-homogeneous light pattern, an outline of a geometric shape, a logo, an alphanumeric character, or any combination of the foregoing light patterns.

17. The method of claim 10, wherein the projected digital image is projected as an animated image comprising light patterns changing over a period of time.

18. The method of claim 10, wherein the apparatus is disposed in a vehicle and the projection surface comprises at least one of a windshield of the vehicle, a rear view mirror of the vehicle, a side view mirror of the vehicle, an interior surface of the vehicle, or a surface exterior to the vehicle.