Near to Eye Display System and Appliance

• US 20100149073A1
• Filed: 10/14/2009
• Published: 06/17/2010
• Est. Priority Date: 11/02/2008
• Status: Abandoned Application

• Current Assignee: David Chaum, John R. Rogers, Thomas W. Mossberg
• Original Assignee: David Chaum, John R. Rogers, Thomas W. Mossberg
• Inventors: Rogers, John R., Mossberg, Thomas W., Chaum, David
• Application Number:
  US12/579,356
• Publication Number:
  US 20100149073A1
• Time in Patent Office: Days
• US Class Current: 345/8
• CPC Class Codes: G02B 2027/0178 Eyeglass type eyeglass details G02C
• CPC Class Codes: G02B 27/0075 with means for altering, e.g. increasing, the depth of field or depth of focus
• CPC Class Codes: G02B 27/0093 with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking
• CPC Class Codes: G02B 27/017 Head mounted
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G09G 3/02 by tracing or scanning a light beam on a screen
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607

Abstract

A near-to-eye display system for forming an image as an illuminated region on a retina of at least one eye of a user is disclosed. The system includes a source of modulated light, a proximal optic positionable adjacent an eye of the user to receive the modulated light. The proximal optic has a plurality of groups of optically redirecting regions. The optically redirecting regions are configured to direct a plurality of beams of the modulated light into a pupil of the eye to form a contiguous illuminated portion of the retina of the eye. A first group of the optically redirecting regions is configured to receive modulated light from the source and redirect beams of the modulated light into the pupil of the eye for illumination of a first portion of the retina. A second group of the optically redirecting regions is configured to receive modulated light from the source and redirect beams of the modulated light into the pupil of the eye for illumination of a second portion of the retina.

Claims

1. A near-to-eye display system for forming an image as an illuminated region on a retina of at least one eye of a user, comprising:

a source of modulated light;

a proximal optic positionable adjacent an eye of the user to receive the modulated light;

the proximal optic having a plurality of groups of optically redirecting regions;

the optically redirecting regions configured to direct a plurality of beams of the modulated light into a pupil of the eye to form a contiguous illuminated portion of the retina of the eye;

a first group of the optically redirecting regions configured to receive modulated light from the source and redirect beams of the modulated light into the pupil of the eye for illumination of a first portion of the retina;

a second group of the optically redirecting regions configured to receive modulated light from the source and redirect beams of the modulated light into the pupil of the eye for illumination of a second portion of the retina.

2. The display system of claim 1, wherein:

the source of modulated light is selectable between the first and second groups of optically redirecting regions.

3. The display system of claim 2, wherein:

the optically redirecting regions are configured to be selectable by the source of modulated light based on the location from which the modulated light emanates.

4. The display system of claim 2, wherein:

the optically redirecting regions are configured to be selectable by the source of modulated light based on the direction of the modulated light received by the optically redirecting regions.

5. The display system of claim 2, wherein:

the optically redirecting regions are configured to be selectable by the source of modulated light based on the frequency of the modulated light.

6. The display system of claim 2, wherein:

the optically redirecting regions are configured to be selected electrically between a first state and a second state.

7. The display system of claim 6, wherein:

the optically redirecting regions comprise liquid crystal structures for selection between the first and second states.

8. The display system of claim 1, wherein:

the source of modulated light is selectable between a first group of optically redirecting regions to illuminate a central portion of the retina and the second group of optically redirecting regions to illuminate a peripheral portion of the retina.

9. The display system of claim 8, wherein:

the second group of optically redirecting regions is divided into a plurality of sets of optically redirecting regions;

the optically redirecting regions of a first of the sets are aimed to direct light to a first location of the eye pupil corresponding to a first rotational position of the eye; and

the optically redirecting regions of a second of the sets are aimed to direct light to a second location of the eye pupil corresponding to a second rotational position of the eye;

the first rotational position of the eye being different than the second rotational position of the eye.

10. The display system of claim 9, wherein:

the source of modulated light and the proximal optic illuminate the retina of the eye in a series of pixels; and

the optical redirecting regions of the first and second sets are distributed across the proximal optic in a configuration such that modulated light received by the proximal optic to form a pixel creates only one beam of modulated light directed toward the eye pupil for a particular rotational position of the eye.

11. The display system of claim 10, wherein:

the source of modulated light is movable during display of the images to shift the illuminated portion of the retina laterally.

12. The display system of claim 8, wherein:

the optically redirecting regions of the proximal optic are configured to provide a plurality of light paths from the source of modulated light to the retina of the user'"'"'s eye, the light paths for the first group of optical redirecting portions directed toward a center of rotation of the eye.

13. The display system of claim 8, wherein:

the optically redirecting regions of the proximal optic are configured to provide a plurality of light paths from the source of modulated light to the retina of the user'"'"'s eye, the light paths for the second group of optical redirecting portions not directed toward a center of rotation of the eye.

14. The display system of claim 8, wherein:

the optically redirecting regions of the first and second groups are configured such that the light beams directed into the pupil by the second group of optically redirecting regions are narrower at the pupil location than are the light beams directed into the pupil by the first group of optically redirecting regions.

15. The display system of claims 14, wherein:

the source of modulated light is configured to cause a beam of modulated light received by an optically redirecting region of the first group to come to a point within a plane containing the beam before the beam reaches the proximal optic.

16. The display system of claim 14, wherein:

the first group of optically redirecting regions is substantially ellipsoidal in shape with a focus at the center of rotation of the user'"'"'s eye.

17. The display of system of claim 14, wherein:

the first and second groups of optically redirecting regions are substantially ellipsoidal in shape with a focus at the center of rotation of the user'"'"'s eye.

18. The display system of claims 1 or 8, wherein:

the redirecting regions are positioned along an ellipsoidal surface;

the ellipsoidal surface has a pair of foci;

one focus of the ellipsoidal surface of the pair is proximate an exit pupil of the source of modulated light; and

the other focus of the ellipsoidal surface is proximate a center of rotation of the user'"'"'s eye.

19. The display system of claim 1, wherein:

the optically redirecting regions of the proximal optic are configured to provide a plurality of light paths from the source of modulated light to the retina of the eye, the light paths being sufficient collectively to illuminate, for each position of the pupil, a portion of the retina corresponding to at least a 50 degree field of view.

20. The display of claim 19, wherein:

the optically redirecting regions are configured to provide light paths sufficient collectively to illuminate, for each position of the pupil, a portion of the retina corresponding to at least a 65 degree field of view.

21. The display of claim 20, wherein:

the optically redirecting regions are configured to provide light paths sufficient collectively to illuminate, for each position of the pupil, a portion of the retina corresponding to at least an 80 degree field of view.

22. The display of claim 21, wherein:

the optically redirecting regions are configured to provide light paths sufficient collectively to illuminate, for each position of the pupil, a portion of the retina corresponding to at least a 100 degree field of view.

23. The display system of claim 1, wherein:

each of the plurality of light paths corresponds to a characteristic angle of entry into the pupil.

24. The display system of claim 1, wherein:

the proximal optic is positioned substantially in front of the eye of the user, extends from a rear surface facing the eye to a front surface facing away from the eye, and has a peripheral edge portion extending from the rear surface to the front surface.

25. The display system of claim 24, wherein:

the proximal optic is configured to receive the modulated light at the rear surface.

26. The display system of claim 24, wherein:

the proximal optic is configured to receive the modulated light at the front surface.

27. The display system of claim 24, wherein:

the proximal optic is configured to receive the modulated light at the peripheral edge.

28. The display system of claim 1, wherein:

the display system comprises circuitry for detecting the position of the pupil of the eye; and

the source of modulated light is configured to select, in response to a detected position of the pupil of the eye, the light paths along which modulated light is directed toward the optically redirecting regions.

29. The display system of claim 1, wherein:

the proximal optic is substantially transparent.

30. The display system of claim 1, wherein:

the proximal optic is substantially opaque.

31. The display system of claim 1, wherein:

the proximal optic is switchable between a first condition in which it is substantially transparent and a second condition in which it is substantially opaque.

32. The display system of claim 1, wherein:

the proximal optic is at least partially transparent and includes a curved surface that provides ophthalmic correction for the eye.

33. The display system of claim 1, wherein:

the proximal optic is at least partially transparent and includes a plurality of curved surfaces that collectively provide ophthalmic correction for the eye.

34. The display system of claim 1, further comprising:

a second proximal optic adjacent a second eye of a user.

35. The display system of claim 1, wherein:

the proximal optic is configured to capture light from the environment.

36. The display system of claim 35, wherein:

the display system comprises control circuitry for altering the image formed on the retina in response to light captured by the proximal optic from the environment.

37. The display system of claim 1, wherein:

the optically redirecting regions of the proximal optic are configured to provide a plurality of light paths along which modulated light is redirected to the retina of the user'"'"'s eye; and

the display system comprises circuitry for detecting light reflected back along such light paths by the user'"'"'s eye.

38. The display system of claim 37, wherein:

the control system further comprises control circuitry for determining the condition of focus of the user'"'"'s eye using the detected light.

39. The display system of claim 37, wherein:

the control further comprises control circuitry for determining the condition of rotation of the user'"'"'s eye using the detected light.

40. The display system of claim 1, wherein:

at least some of the optically redirecting regions are embedded within a supporting matrix; and

the supporting matrix comprises a first light transmissive element, a redirecting layer and a second light transmissive element that covers the redirecting layer.

41. The display system of claim 1, wherein:

the optically redirecting regions are positioned along at least two longitudinally separated layers.

42. The display system of claim 41, wherein:

the optically redirecting regions in the at least two longitudinally separated layers are selectable by adjustment of a wavelength of the incident light.

43. The display system of claim 1, wherein:

some of the optically redirecting regions are disposed on a surface of a transparent substrate; and

others of the optically redirecting regions are disposed within the transparent substrate.

44. The display system of claim 1, wherein:

at least one optically redirecting region in the plurality comprises a reflective surface.

45. The display system of claim 1, wherein:

at least one optically redirecting region in the plurality comprises a refractive structure.

46. The display system of claim 1, wherein:

at least one optically redirecting region in the plurality comprises a surface diffractive structure.

47. The display system of claim 46, wherein:

at least one optically redirecting region in the plurality comprises a diffraction grating.

48. The display system of claim 1, wherein:

at least one optically redirecting region in the plurality comprises a volume diffractive structure.

49. The display system of claim 1, wherein:

at least one optically redirecting region in the plurality comprises a Bragg reflector.

50. The display system of claim 1, wherein:

at least one optically redirecting region in the plurality comprises a switchable structure.

51. The display system of claim 1, wherein:

at least one optically redirecting region in the plurality comprises a switchable reflector.

52. The display system of claim 1, wherein:

at least one optically redirecting region in the plurality comprises a switchable shutter.

53. The display system of claim 1, wherein:

at least one optically redirecting region in the plurality comprises a switchable hologram.

54. The display system of claim 1, wherein:

the proximal optic is positioned substantially in front of the eye of the user, extends from a rear surface facing the eye to a front surface facing away from the eye, and has a peripheral edge portion extending from the rear surface to the front surface; and

the proximal optic further comprises a stray light reducing structure for reducing an amount of incident light that is transmitted through the front surface.

55. The display system of claim 54, wherein:

the stray light reducing structure is on the front surface of the proximal optic.

56. The display system of claim 54, wherein:

the stray light reducing structure is embedded within the proximal optic.

57. The display system of claim 54, wherein:

the stray light reducing structure is absorptive.

58. The display system of claim 54, wherein:

the stray light reducing structure is diffractive.

59. The display system of claim 54, wherein:

the stray light reducing structure is a nanostructure.

60. The display system of claim 54, wherein:

the stray light reducing structure is switchable and additionally reduces an amount of ambient light that is transmitted through the proximal optic to the eye.

61. The display system of claim 1, wherein:

at least one optically redirecting region redirects light, reflected off the eye, to an eye tracker.

62. The display system of claim 8, wherein:

the optically redirecting regions are optically continuous over a portion of the proximal optic.

63. The display system of claim 8, wherein:

the optically redirecting regions of the first group are optically continuous.

64. The display system of claim 8, wherein:

at least some of the optically redirecting regions are redirectors that are optically discrete from one another.

65. The display system of claim 8 or 64, wherein:

the optically redirecting regions of the second group are redirectors that are optically discrete from one another.

66. The display system of claim 65, wherein:

the redirectors of the second group are positioned to be spatially distinct in a lateral direction.

67. The display system of claim 65, wherein:

at least some of the redirectors are spaced apart laterally by a grout region that does not redirect the modulated light into the pupil of the eye.

68. The display system of claim 64, wherein:

for an adjacent pair of redirectors simultaneously illuminated by a beam of the modulated light, at most one redirector in the pair directs a respective portion of the beam into the pupil of the eye, and the other redirector of the pair directs a respective portion of the beam angularly away from the pupil of the eye.

69. The display system of claim 64, wherein:

the redirectors of the second group spatially overlap one another in a lateral direction to effectively form layers of redirecting features.

70. The display system of claim 69, wherein:

the spatially overlapping layers of redirecting features provide at least one redirecting feature with sufficient redirector area in the path of any given one of the redirected light beams, as viewed from the source of modulated light, to redirect substantially all of such light beam into the user'"'"'s eye.

71. The display system of claim 69, wherein:

the overlapping layers of redirecting features provide substantially complete coverage of a preselected portion of the proximal optic.

72. The display system of claim 65, wherein:

the redirectors of the second group are positioned along a single layer.

73. The display system of claim 65, wherein:

the redirectors of the first group are positioned along an ellipsoidal surface;

the ellipsoidal surface has a pair of foci;

one focus of the ellipsoidal surface is proximate an exit pupil of the source of light; and

the other focus of the ellipsoidal surface is proximate a center of rotation of the user'"'"'s eye.

74. The display system of claim 73 wherein:

each of the redirectors of the second group has a corresponding reflective plane that is tangential to the ellipsoidal surface proximate the center of the redirector.

84. The display system of claim 1, wherein at least some beams walk on at least some of the optically redirecting regions.

85. The display system of claim 1, wherein at least some beams walk on at least the pupil of the eye.

75. A proximal optic positionable adjacent an eye of a user in a near-to-eye display system for forming an image as an illuminated region on a retina of the eye, the proximal optic comprising:

an optical structure positionable adjacent the eye and in a preselected configuration relative to a source of modulated light for reception of modulated light from the source;

and

a plurality of groups of optically redirecting regions;

the optically redirecting regions configured to direct a plurality of beams of the modulated light into a pupil of the eye to form a contiguous illuminated portion of the retina of the eye;

a first group of the optically redirecting regions configured to receive the modulated light and redirect beams thereof into the pupil of the eye for illumination of a first portion of the retina;

a second group of the optically redirecting regions configured to receive modulated light and redirect beams thereof into the pupil of the eye for illumination of a second portion of the retina.

76. A method for displaying images by forming an illuminated region on a retina of at least one eye of a user, comprising:

providing a source of modulated light;

providing a proximal optic positionable adjacent an eye of the user to receive the modulated light, the proximal optic having a plurality of groups of optically redirecting regions;

directing a plurality of beams of the modulated light into a pupil of the eye to form a contiguous illuminated portion of the retina of the eye, comprising;

directing modulated light from the source onto a first group of the optically redirecting regions to create beams of the modulated light directed into the pupil of the eye for illumination of a first portion of the retina; and

directing modulated light from the source onto a second group of the optically redirecting regions to create beams of the modulated light directed into the pupil of the eye for illumination of a second portion of the retina.

77. A projector for displaying an image along an optical path on a retina of an eye in a near-to-eye display, comprising:

a source of modulated light configured to direct at least one beam of modulated light along an optical path;

at least one steering element along the optical path for dynamically adjusting an effective launch angle and an effective launch position of the beam;

wherein the launch angle and the launch position are dynamically adjustable during display of the image.

82. The projector of claim 77, wherein the effective angle and launch position directs the beam to a point on a pupil sphere of the eye while delivering a range of angles pivoting on the point.

83. The projector of claim 77, wherein the effective angle and launch position directs the beam to a point on a proximal optic while delivering a range of angles pivoting on that point.

78. A projector for displaying an image on a retina of an eye in a near-to-eye display, comprising:

a source of modulated light configured to create a bundle of rays comprising an image beam;

relay optics receiving the image beam and directing it to an exit pupil; and

a beam steering element at an exit pupil of the relay optics to steer the image beam.

79. A multimedia eyeglass device, comprising:

an eyeglass frame, comprising a side arm and an optic frame;

an output device for delivering an output to the wearer, the output device being supported by the eyeglass frame and being selected from the group consisting of a speaker, a bone conduction transmitter, an image projector, and a tactile actuator;

an input device for obtaining an input, the input device being supported by the eyeglass frame and being selected from the group consisting of an audio sensor, a tactile sensor, a bone conduction sensor, an image sensor, a body sensor, an environmental sensor, a global positioning system receiver, and an eye tracker; and

a processor comprising a set of programming instructions for controlling the input device and the output device.

80. A head-worn multimedia device comprising:

a frame comprising a side arm and an optic frame;

an audio transducer supported by the frame;

a tactile sensor supported by the frame;

a processor comprising a set of programming instructions for receiving and transmitting information via the audio transducer and the tactile sensor;

a memory device for storing such information and instructions; and

a power supply electrically coupled to the audio transducer, the tactile sensor, the processor, and the memory device.

81. A method for controlling a multimedia eyeglass device, comprising:

providing an eyeglass device comprising;

an output device for delivering information to the wearer, the output device being selected from the group consisting of a speaker, a bone conduction transmitter, an image projector, and a tactile actuator;

an input device for obtaining information, the input device being selected from the group consisting of an audio sensor, a tactile sensor, a bone conduction sensor, an image sensor, a body sensor, an environmental sensor, a global positioning system receiver, and an eye tracker; and

a processor comprising a set of programming instructions for controlling the input device and the output device; and

providing an input by the input device;

determining a state of the output device, the input device, and the processor;

accessing the programming instructions to select a response based on the input and the state; and

providing the response by the output device.