Head mounted display for miniature video display system

• US 5,003,300 A
• Filed: 05/31/1988
• Issued: 03/26/1991
• Est. Priority Date: 07/27/1987
• Status: Expired due to Term

• Current Assignee: Microvision, Inc.
• Original Assignee: Reflection Technology, Inc.
• Inventors: Wells, Benjamin A.
• Primary Examiner(s): Oberley, Alvin E.
• Assistant Examiner(s): FATAHI YAR, MAHMOUD
• Application Number:
  US07/200,692
• Time in Patent Office: 1,029 Days
• Field of Search: 340/705, 340/980, 358/103, 358/104, 358/109, 350/174, 350/6.5, 350/6.6, 353/11, 353/12, 353/13, 353/14
• US Class Current: 345/8
• CPC Class Codes: G02B 13/16 for use in conjunction with image converters or intensifiers , or for use with projectors, e.g. objectives for projection TV
• CPC Class Codes: G02B 2027/0132 comprising binocular systems
• CPC Class Codes: G02B 2027/014 comprising information/image processing systems
• CPC Class Codes: G02B 2027/0143 the two eyes not being equipped with identical nor symmetrical optical devices
• CPC Class Codes: G02B 2027/0156 with optionally usable elements
• CPC Class Codes: G02B 2027/0159 with mechanical means other than scaning means for positioning the whole image
• CPC Class Codes: G02B 2027/0178 Eyeglass type eyeglass details G02C
• CPC Class Codes: G02B 27/017 Head mounted
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 27/0176 characterised by mechanical features
• CPC Class Codes: G02B 30/34 Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers
• CPC Class Codes: H04N 3/08 having a moving reflector

Abstract

A head mounted display for presentation of video information includes a virtual raster display unit, an attachment mechanism for attaching the display unit to the head of the user, a support member connected to the attachment mechanism for supporting the display unit within the user'"'"'s field of vision, and a remote signal source for providing power, timing, control signals and display information to the display system. The head attachment mechanism can be symmetrically designed to allow positioning of the display unit in front of either of the viewer'"'"'s eyes, or the attachment mechanism may be eliminated completely and the support member and display unit attached directly to a conventional helmet or the user'"'"'s eyeglasses.

Claims

1. A head-mounted visual display system comprising:

a number of independently illuminated light-emitting elements;

imaging optics for creating an enlarged virtual image of said light-emitting elements;

a mirror in which the reflection of said enlarged virtual image can be observed;

means for repetitively moving said mirror through a predetermined range of movement to create a two-dimensional raster image of said reflection, said raster image being comprised of a number of picture elements, said number of picture elements being greater than said number of light-emitting elements;

means for selectively illuminating said light-emitting elements;

attachment means secured to the head of a user;

support means connected to said attachment means and said display system for supporting said display system within said user'"'"'s field of vision; and

remote signal means connected to said display system for providing data necessary to drive said display system.

2. The head-mounted display of claim 1 wherein said light-emitting elements are aligned in a substantially one-dimensional array.

3. The head-mounted display of claim 1 wherein said support means include a means for adjusting the brightness of said light-emitting elements of said display system.

4. The head-mounted display of claim 3 wherein said means for adjusting the brightness comprises a photoelectric cell and support circuitry for sensing the ambient light of the user'"'"'s environment and adjusting said brightness accordingly.

5. The head-mounted display of claim 1 wherein said support means includes means for adjusting the display-to-eye position according to user preference.

6. The head-mounted display of claim 1 wherein said support means includes a means for adding an additional external focus correction lens within the eye to-display distance.

7. The head-mounted display of claim 1 wherein said support means is attachable on either side of said attachment means enabling said display system to be positioned in front of either of user'"'"'s eyes.

8. The head-memory display of claim 1 wherein said head attachment means includes means for inverting the virtual image produced by said display system to permit viewing of the virtual image when the display system is repositioned from one of a user'"'"'s eyes to another.

9. The head-mounted display of claim 1 wherein said support means includes means for retracting said display system from user'"'"'s line of sight, while said display system remains attached to said support means.

10. The support means of claim 9 wherein a pivotal joint connects said support means to said attachment means thereby allowing said support means and said display system to be displaced vertically out of user'"'"'s line of sight.

11. The head-mounted display of claim 1 wherein all or part of said attachment means is comprised of user'"'"'s eye glasses.

12. The attachment means of claim 11 wherein users prescription lenses can be integrated into said attachment means.

13. The head-mounted display of claim 1 wherein said attachment means comprises at least one strap positioned across the top or back of user'"'"'s head.

14. The head-mounted display of claim 1 wherein said attachment means comprises a flexible headband fixable around the perimeter of said users head.

15. The head-mounted display of claim 1 wherein said attachment means comprises a cap or hat like structure fixable about the top of the user'"'"'s head.

16. The head-mounted display of claim 1 wherein said attachment means comprises a conventional helmet like structure.

17. The head mounted display of claim 1 wherein said attachment means comprises a mask like structure.

18. The head-mounted display of claim 1 wherein said attachment means comprises safety goggles or glasses as used in an industrial application.

19. The head-mounted display of claim 1 wherein said remote signal source is coupled to said display system by an electrical or fiber optic cable.

20. The head-mounted display of claim 1 wherein said remote signal source is connected to said display system by a radio wave transmitter/receiver configuration, said transmitter located in said remote signal source, said receiver attached to said display system.

21. The head-mounted display device of claim 1 wherein said remote signal source is coupled to said display system by means of an optical data transmission link.

22. The head-mounted display device of claim 1 wherein said source of display information comprises a pocket calculator or computer.

23. The head-mounted display device of claim 1 wherein said source of display information comprises a video receiving device for receiving remotely generated display information from a television or video transmitter.

24. The head-mounted display device of claim 1 wherein said remote signal source further comprises an audio receiver and earphones for transmitting audio signal to the user.

25. The head-mounted display device of claim 1 wherein said remote signal means further comprises a microphone and audio transmission means for transmitting audio signals qenerated by the user.

26. The head-mounted display device of claim 1 wherein said remote signal means is attachable to the belt of the user.

27. The head-mounted display device of claim 1 wherein said remote signal means is secured to or integrated within said attachment means.

28. The head-mounted display of claim 1 wherein said support means is adjustably connected to said attachment means so as to enable positioning of said display system in front of either of viewer'"'"'s eyes by repositioning said support means.

29. The head-mounted display device of claim 1 wherein said attachment means, said support means, said remote signal means and said display systems are integrated into a child'"'"'s toy mask or helmet device.

32. The head-mounted visual display system of claim 1 wherein said light-emitting elements are light-emitting diodes.

33. The head-mounted display system of claim 1 wherein said support means includes a light-tight box connected integrally with said support means for housing said light-emitting elements, said imaging optics and said mirror of said display system.

30. A head-mounted binocular visual display system comprising:

a pair of display systems, each of said display systems comprising;

a number of independently-illuminated light-emitting elements;

imaging optics for creating an enlarged virtual image of said light-emitting elements;

a mirror in which the reflection of said enlarged virtual image can be observed;

means for repetitively moving said mirror through a predetermined range of movement to create a two-dimensional raster image of said reflection, said raster image being comprised of a number of picture elements, said number of picture elements being greater than said number of light-emitting elements; and

means for selectively illuminating said light-emitting elements;

attachment means secured to the head of a user;

support means, attached to said display systems, and further attached to said attachment means for supporting said display systems in front of viewer'"'"'s eyes;

means for horizontally aligning said display systems to achieve the desired inter-pupilary distance for binocular viewing; and

remote signal means connected to said display systems for providing a source of video display information.

31. The head-mounted binocular visual display system of claim 30 wherein the light-emitting elements of each of said

lay systems are aligned in a substantially one-dimensional array.

34. The head-mounted binocular visual display system of claim 30 wherein said light-emitting elements are light-emitting diodes.

35. The head-mounted binocular visual display system of claim 30 wherein the raster image created by a first of said display systems is different from the raster image created by the second of said display systems creating the illusion of three-dimensional viewing.