Miniature personal display

• US 6,229,503 B1
• Filed: 08/25/1998
• Issued: 05/08/2001
• Est. Priority Date: 08/25/1998
• Status: Expired due to Term

• Current Assignee: Aurora Biotechnologies, Inc. (Azenta, Inc.)
• Original Assignee: Charles E. Crist, Robert Mays Jr
• Inventors: Mays, Robert Jr., Crist, Charles E.
• Primary Examiner(s): Luu, Matthew
• Assistant Examiner(s): Blackman, Anthony J.
• Application Number:
  US09/139,372
• Time in Patent Office: 987 Days
• Field of Search: 345/7-9, 359/630
• US Class Current: 345/7
• 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: H01S 5/0087 for illuminating phosphorescent or fluorescent materials, e.g. using optical arrangements specifically adapted for guiding or shaping laser beams illuminating these materials
• CPC Class Codes: H01S 5/4087 emitting more than one wavelength
• CPC Class Codes: H01S 5/423 having a vertical cavity

Abstract

A personal display device miniaturized to allow the projection of images directly on the viewer'"'"'s retina which is a compact and versatile device that further minimizes the potential for total immersion. The display device can be selected for use in the monitor mode or full video and full color or monochrome operation. The invention utilizes miniaturized 2D laser arrays integrated with nonlinear optical processes combining semiconductor technology with optics technology.

Claims

1. An apparatus for projecting an image on a retina, said apparatus comprising:

a semiconductor package;

a connection means integral to said semiconductor package;

a two dimensional (m×

n) array of emitters electrically connected to said semiconductor package by said connection means, wherein said emitters are a monochromatic pump source;

an optics element attached to said two dimensional array of emitters, wherein the optics element includes a two dimensional (m×

n) array of individual optical elements matched to the two dimensional array of emitters; and

a phosphor element mounted on the apparatus between the two dimensional array of emitters and the optics element.

2. The apparatus of claim 1 wherein the emitters comprise laser diodes.

3. The apparatus of claim 1 wherein the emitters comprise surface emitting, light emitting diodes.

4. The apparatus of claim 1 wherein said connection means further comprise atomically sharp points.

5. The apparatus of claim 1 wherein said semiconductor package provides drive electronics to control and power said emitters.

6. The apparatus of claim 1 wherein said emitters produce nonvisible radiation.

7. The apparatus of claim 6 wherein the nonvisible radiation is converted to visible light by said phosphor element through a conversion process.

8. The apparatus of claim 1 wherein the optics element further comprises at least one thin film element.

9. The apparatus of claim 1 wherein the optics element further comprises:

a lens of immersion type providing magnification and collimation;

a second lens of Fresnel/holographic type dispersive having contoured grating and mounted to said first lens; and

,

a third lens of Fresnel/holographic grating type providing collimation and mounted to said second lens.

10. The apparatus of claim 1 wherein said phosphor element is a thin film.

11. The apparatus of claim 1 wherein said phosphor element is a thick film.

12. The apparatus of claim 1 wherein said phosphor element is mounted directly on said array of emitters.

13. The apparatus of claim 1 wherein said phosphor element is mounted directly on said optics element.

14. The apparatus of claim 1 wherein the semiconductor package, connection means, array of emitter, optics element, and phosphor element are all integrally contained in one package.

15. The apparatus of claim 1 further comprising a means for mounting the apparatus on a human head and orienting said apparatus to project an image on a retina.

16. The apparatus of claim 1 further comprising a means for selecting monitor, full video, full color, or monochromatic viewing modes.

17. A method for projecting an image on a retina comprising the steps of:

(a) activating semiconductor drive electronics which power emitters to produce energy;

(b) directing the produced energy at a phosphor element which converts this energy to visible light through the up-conversion process; and

(c) focusing said visible light on a retina, wherein the emitters of step (a) are a two-dimensional array of emitters and the phosphor element of step (b) is a two-dimensional array of phosphor elements matched to the two-dimensional array of emitters and mounted between the two-dimensional array of emitters and an optical element.

18. The method of claim 17 wherein the emitters of step (a) comprise laser diodes emitting monochromatic infrared radiation.

19. The method of claim 17 wherein the phosphor element of step (b) is a two-dimensional (m×

n) array of individual nonlinear optical phosphor materials.

20. A miniature personal display comprising:

a carrier device for mounting said display on a viewer'"'"'s head;

at least one integrated semiconductor package, said package comprising drive electronics and a beam source attached to said carrier device;

at least one integrated optics and phosphor element attached to said carrier device, wherein said package pumps energy onto said phosphor thereby producing visible light through the up-conversion process, which light is focused on the viewers eye by said optics, and wherein said beam source and said optics are matched two dimensional arrays of elements.

21. The miniature display of claim 20 wherein said display is capable of operating in either full video or monitor mode.

22. The miniature display of claim 21 wherein said display is capable of operating in full color or monochrome mode.

23. A miniature personal display apparatus for projecting an image onto an eye of a user, comprising:

a control component;

a two dimensional array of emitters electrically connected to the control component;

an optics element attached to said two dimensional array of emitters, wherein the optics element contains a set of optical elements, wherein each individual optical element in the set is associated with an emitter in the two dimensional array of emitters; and

a phosphor element mounted between the two dimensional array of emitters and the optics element.

24. The apparatus of claim 23, wherein the individual optical elements for each one of the emitters in the two-dimensional array are etched with a collimation grating.

25. The apparatus of claim 23, wherein the phosphor element includes an individual nonlinear optical phosphor material for each of the individual optical elements.

26. The apparatus of claim 25, wherein the individual nonlinear optical phosphor material is applied directly to a corresponding individual optical element of the individual optical elements.

27. The apparatus of claim 25, wherein each emitter in the array of emitters emits radiation of a same wavelength, and wherein the individual nonlinear optical phosphor material emits a different visible light from other individual nonlinear optical phosphor materials in the phosphor element based on characteristics of the individual nonlinear optical phosphor material.

28. The apparatus of claim 23, wherein each emitter in the array of emitters is capable of being randomly addressed at either monitor or full-video rates.

29. The apparatus of claim 23, wherein the two dimensional array of emitters is electrically connected to the control component by an array of atomically sharp metallic points.

30. The apparatus of claim 23, wherein each of the individual optics elements comprise:

a first element that magnifies light passing through the first element;

a second element that further magnifies light passing through the second element; and

a third element that provides final collimation for input to the eye of the user.

31. The apparatus of claim 30, wherein the first element is an immersion type optical element, the second element is a Fresnel or holographic type dispersive optical element, and the third element is a Fresnel or holographic type optical element.

32. The apparatus of claim 30, wherein the first, second and third elements are thin or thick film elements.

33. The apparatus of claim 30, wherein the phosphor element is mounted to a side of the first element closest to the array of emitters.

34. The apparatus of claim 23, wherein the control component controls the two-dimensional array of emitters to emit radiation onto the phosphor element such that the phosphor element emits visible light through the optics element directly onto the eye of the user without scanning.

35. A miniature display for projecting an image onto an eye of a user, comprising:

drive electronics;

an array of light emitting elements; and

an array of connectors for connecting the drive electronics to each light emitting element in the array of light emitting elements, wherein the connectors are atomically sharp metallic points and wherein the connectors touch the drive electronics and the array of light emitting elements.

36. A miniature display for projecting an image onto an eye of a user, comprising:

drive electronics;

an array of light emitting elements; and

an array of connectors for connecting the drive electronics to each light emitting element in the array of light emitting elements, wherein the connectors are atomically sharp metallic points and wherein the connectors connect the drive electronics to each of the light emitting elements in the array of light emitting elements on a one-to-one basis.

37. A miniature display apparatus for projecting an image directly onto an eye of a user, comprising:

drive electronics;

a two-dimensional array of emitters electrically connected to the drive electronics;

an optics element attached to the two-dimensional array of emitters; and

a phosphor element mounted on the miniature display apparatus between the two-dimensional array of emitters and the optics element, wherein the drive electronics drive the two-dimensional array of emitters to emit radiation onto the phosphor element such that the phosphor element emits visible light through the optics element directly onto the eye of the user without scanning.