LIGHT BAR STRUCTURE HAVING LIGHT CONDUITS AND SCANNED LIGHT DISPLAY SYSTEM EMPLOYING SAME

• US 20080043487A1
• Filed: 08/09/2007
• Published: 02/21/2008
• Est. Priority Date: 08/21/2006
• Status: Abandoned Application

• Current Assignee: Microvision, Inc.
• Original Assignee: Microvision, Inc.
• Inventors: Sprague, Randall
• Application Number:
  US11/836,714
• Publication Number:
  US 20080043487A1
• Time in Patent Office: Days
• US Class Current: 362/581
• CPC Class Codes: G02B 6/0008 the light being emitted at the end of the fibre
• CPC Class Codes: G02B 6/0018 Redirecting means on the surface of the light guide
• CPC Class Codes: G09G 3/001 using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background slide projectors per se G03B23/00 = 42 HP

Abstract

Apparatuses and methods for light bar structures and scanned light display systems. A light bar structure includes an elongated support arm having a plurality of light conduits. Each of the light conduits includes at least one input portion and a distal output end. A plurality of light emitters may be mounted on the support arm, each of the light emitters being positioned over an input portion of a corresponding one of the light conduits and operable to provide light thereto so that the light is optically coupled to the corresponding one of the light conduits and output from the output end thereof as diverging light. A scanned light display system includes a curved mirror positioned to receive the diverging light and configured to substantially collimate the received light. An actuator is operable to relatively move the light bar structure and the curved mirror to scan the collimated light to form an image.

Claims

1. A light bar structure for use in a scanned light display, comprising:

an elongated support arm having a plurality of light conduits formed therein, each of the light conduits including at least one input portion and a distal output end; and

a plurality of light emitters mounted on the support arm, each of the light emitters is operable to emit light and positioned adjacent the at least one input portion of a corresponding one of the light conduits so that the light emitted from each of the light emitters is optically coupled to the corresponding one of the light conduits and output from the output end thereof as diverging light.

2. The light bar structure of claim 1 wherein the support arm includes a curved portion having a convex surface and wherein each of the distal output ends of the light conduits terminate at the convex surface.

3. The light bar structure of claim 1, further comprising a hinge attachment portion configured for attachment to a hinge mechanism, the hinge attachment portion attached to and projecting away from the support arm.

4. The light bar structure of claim 3 wherein the hinge attachment portion is integrally formed with the support arm.

5. The light bar structure of claim 1 wherein each of the light emitters comprises a plurality of light emitters.

6. The light bar structure of claim 1 wherein at least a portion of each of the light conduits is defined by a first and second reflecting portion.

7. The light bar structure of claim 6 wherein each of the light conduits comprises a dielectric plug positioned between the first and second reflecting portions.

8. The light bar structure of claim 7 wherein the dielectric plug comprises silicon dioxide.

9. The light bar structure of claim 6 wherein the first and second reflecting portions are selected from the group consisting of copper, silver, aluminum, and alloys thereof.

10. The light bar structure of claim 1 wherein the at least one input portion of each of the light conduits comprises a reflecting surface configured to direct the light out of the output end.

11. The light bar structure of claim 10 wherein the reflecting surface is oriented at a selected angle.

12. The light bar structure of claim 10 wherein the reflecting surface has a stepped configuration.

13. The light bar structure of claim 1 wherein each of the light emitters is positioned over an aperture superjacent the at least one input portion and formed in a corresponding one of the light conduits.

14. The light bar structure of claim 1 wherein the support arm comprises a semiconductor material.

15. The light bar structure of claim 14 wherein the semiconductor material comprises silicon.

16. The light bar structure of claim 1 wherein the light conduits comprise first and second light conduits each of which has at least one input portion and a distal output end.

17. The light bar structure of claim 16 wherein the first light conduit is associated with a first light emitter positioned and operable to provide light of a first color to a first input portion of a first section of the first light conduit, the first light conduit is further associated with a second light emitter positioned and operable to provide light of a second color to a second input portion of a second section of the first light conduit, the first section intersecting the second section so that the light of the first and second colors is output from the first light conduit, and the second light conduit is associated with a third light emitter positioned and operable to provide light of a third color to the second light conduit.

18. The light bar structure of claim 1 wherein each of the light emitters is operable to emit light of only one color.

19. The light bar structure of claim 1 wherein each of the light emitters is operable to emit diverging light.

20. The light bar structure of claim 1 wherein the support arm has a substantially flat surface and each of the light emitters are mounted to the substantially flat surface.

21. The light bar structure of claim 1 wherein the support arm extends generally in a first direction and each of the light conduits extends transversely through at least part of the support arm.

22. A method of fabricating a light bar structure, comprising:

forming a plurality of trenches in a substrate, each of the trenches having at least one input portion and a distal output end;

covering each of the trenches with at least one layer of material to define a plurality of light conduits;

forming an aperture in the at least one layer of material adjacent each of the input portions;

positioning a plurality of light emitters, each of the light emitters positioned adjacent one of the apertures; and

forming a support arm comprising the plurality of light conduits from the substrate.

23. The method of claim 22 wherein the substrate comprises a semiconductor material.

24. The method of claim 23 wherein the semiconductor material comprises silicon.

25. The method of claim 22 wherein the act of forming a plurality of trenches having at least one input portion and a distal output end comprises etching the substrate to form the plurality of trenches.

26. The method of claim 22, further comprising:

after the act of forming a plurality of trenches, forming a first reflecting portion on surfaces of each of the trenches; and

forming a dielectric plug within each of the trenches and over the first reflecting portion;

and wherein the act of covering each of the trenches with at least one layer of material to define a plurality of light conduits comprises forming a second reflecting portion over the dielectric plug.

27. The method of claim 22 wherein the act of forming an aperture in the layer of material adjacent each of the input portions comprises etching the aperture in the layer material.

28. The method of claim 22 wherein the act of positioning a plurality of light emitters, each of the light emitters positioned adjacent one of the apertures comprises mounting each of the light emitters over a corresponding one of the apertures.

29. The method of claim 22 wherein the act of forming a support arm comprising the plurality of light conduits from the substrate comprises etching the support arm from the substrate.

30. The method of claim 29 wherein the act of etching the support arm from the substrate comprises deep reactive ion etching.

31. The method of claim 22 wherein the act of forming a support arm comprising the plurality of light conduits from the substrate comprises forming the support arm integrally with a hinge attachment portion.

32. A scanned light display system, comprising:

at least one light bar structure, comprising;

an elongated support arm having a plurality of light conduits formed therein, each of the light conduits including at least one input portion and a distal output end; and

a plurality of light emitters mounted on the support arm, each of the light emitters is operable to emit light and positioned adjacent the at least one input portion of a corresponding one of the light conduits so that the light emitted from each of the light emitters is optically coupled to the corresponding one of the light conduits and output from the output end thereof as diverging light;

a curved mirror positioned to receive at least a portion of the diverging light and configured to substantially collimate the received diverging light; and

an actuator coupled to at least one of the at least one light bar structure and the curved mirror, the actuator operable to move the at least one light bar structure and the curved mirror relative to each other to scan the substantially collimated light to form an image.

33. The scanned light display system of claim 32 wherein the support arm includes a curved portion having a convex surface and wherein each of the distal output ends of the light conduits terminate at the convex surface.

34. The scanned light display system of claim 32, further comprising a hinge attachment portion configured for attachment to a hinge mechanism, the hinge attachment portion attached to and projecting away from the support arm.

35. The scanned light display system of claim 34 wherein the hinge attachment portion is integrally formed with the support arm.

36. The scanned light display system of claim 32 wherein each of the light emitters comprises a plurality of light emitters.

37. The scanned light display system of claim 32 wherein at least a portion of each of the light conduits is defined by a first and second reflecting portion.

38. The scanned light display system of claim 37 wherein each of the light conduits comprises a dielectric plug positioned between the first and second reflecting portions.

39. The scanned light display system of claim 38 wherein the dielectric plug comprises silicon dioxide.

40. The scanned light display system of claim 37 wherein the first and second reflecting portions are selected from the group consisting of copper, silver, aluminum, and alloys thereof.

41. The scanned light display system of claim 32 wherein the at least one input portion of each of the light conduits comprises a reflecting surface configured to direct the light toward the output end.

42. The scanned light display system of claim 41 wherein the reflecting surface is oriented at a selected angle.

43. The scanned light display system of claim 41 wherein the reflecting surface has a stepped configuration.

44. The scanned light display system of claim 32 wherein each of the light emitters is positioned over an aperture superjacent the at least one an input portion and formed in a corresponding one of the light conduits.

45. The scanned light display system of claim 32 wherein the support arm comprises a semiconductor material.

46. The scanned light display system of claim 45 wherein the semiconductor material comprises silicon.

47. The scanned light display system of claim 32 wherein each of the light conduits comprises first and second light conduits each of which has at least one input portion and a distal output end.

48. The scanned light display system of claim 47 wherein the first light conduit is associated with a first light emitter positioned and operable to provide light of a first color to a first input portion of a first section of the first light conduit, the first light conduit is further associated with a second light emitter positioned and operable to provide light of a second color to a second input portion of a second section of the first light conduit, the first section intersecting the second section so that the light of the first and second colors is output from the first light conduit, and the second light conduit is associated with a third light emitter positioned and operable to provide light of a third color to the second light conduit.

49. The scanned light display system of claim 32 wherein each of the light emitters is operable to emit light of only one color.

50. The scanned light display system of claim 32 wherein each of the light emitters is operable to emit diverging light.

51. The scanned light display system of claim 32 wherein the support arm has a substantially flat surface and each of the light emitters are mounted to the substantially flat surface.

52. The scanned light display system of claim 32 wherein the support arm extends generally in a first direction and each of the light conduits extends transversely through at least part of the support arm.

53. The scanned light display system of claim 32 wherein the support arm has a longitudinal axis that extends generally in a first direction and the actuator is operable to move the at least one light bar structure in a second direction that is substantially perpendicular to the first direction.

54. The scanned light display system of claim 32 wherein the actuator is coupled to the at least one light bar structure and operable to move the at least one light bar structure to scan the substantially collimated light in at least one dimension to form the image.

55. The scanned light display system of claim 32 wherein the support arm extends generally in a first direction;

and

further comprising a control system coupled to the light emitters and the actuator, the control system being operable to couple signals to the light emitters to sequentially scan in the first direction and to couple a signal to the actuator to move the at least one light bar structure in a second direction that is substantially perpendicular to the first direction.

56. The scanned light display system of claim 32 wherein the support arm includes a curved portion having a convex surface with a curvature that corresponds to the curvature of the curved mirror and wherein each of the output ends of the light conduits terminate at the convex surface.

57. The scanned light display system of claim 32 wherein the support arm has a longitudinal axis that extends generally in a first direction and the actuator is operable to move the at least one light bar structure in a second direction that is substantially perpendicular to the first direction in a manner that maintains the distance between the output ends of the light conduits and the curved mirror substantially constant as the actuator moves the support arm in the second direction.

58. The scanned light display system of claim 32 wherein the curved mirror has a focal surface, and wherein the output ends of the light conduits are positioned substantially at the focal surface.

59. The scanned light display system of claim 58 wherein the curved mirror is a spherical mirror and the focal surface is a focal sphere.

60. The scanned light display system of claim 32 wherein the curved mirror comprises a mirror that is at least partially transparent.

61. The scanned light display system of claim 32 wherein the curved mirror comprises a spherical mirror.

62. The scanned light display system of claim 32 wherein the curved mirror comprises a Fresnel mirror.

63. The scanned light display system of claim 32 wherein the curved mirror comprises a diffractive mirror.

64. The scanned light display system of claim 32 wherein the support arm has a longitudinal axis that extends generally in a first direction;

and

wherein the actuator is operable to move the curved mirror to scan the substantially collimated light in the first direction.

65. The scanned light display system of claim 32 wherein the support arm has a longitudinal axis that extends generally in a first direction and wherein the actuator is operable to move the support arm in the first direction.

66. The scanned light display system of claim 32 wherein the actuator is coupled to the curved mirror and operable to move the curved mirror to scan the substantially collimated light in at least one dimension to form the image.

67. The scanned light display system of claim 32, further comprising a control system coupled to the light emitters and the actuator, the control system being operable to couple signals to the light emitters and the actuator.

68. The scanned light display system of claim 67, further comprising an image capture system.

69. The scanned light display system of claim 67, further comprising an image generation system and wherein the control system is operable to scan the substantially collimated light to form the image responsive to a signal from the image generation system.

70. The scanned light display system of claim 69 wherein the image generation system comprises one of a video gaming system, a digital camera, a recorded media player, and a television receiver.

71. A method of generating an image by scanning light on a retina of a viewer'"'"'s eye, the method comprising:

emitting light from each of a plurality of light conduits generally extending in a first direction, the light generated at each of the light conduits being reflected to the retina of the viewer'"'"'s eye from a reflecting surface;

moving the light generation locations in a second direction that is generally perpendicular to the first direction; and

controlling the intensity of the light from each of the light conduits.