Head-mounted matrix display

• US 6,424,321 B1
• Filed: 12/27/1995
• Issued: 07/23/2002
• Est. Priority Date: 10/22/1993
• Status: Expired due to Fees

• Current Assignee: Kopin Corporation
• Original Assignee: Kopin Corporation
• Inventors: Ronzani, Peter A., Jacobsen, Jeffrey, Pombo, Stephen, Bumgardner, Rodney
• Primary Examiner(s): WU, XIAO MIN
• Application Number:
  US08/579,415
• Time in Patent Office: 2,400 Days
• Field of Search: 345/8, 345/7, 345/4, 345/5, 345/6, 345/87, 345/102, 345/76, 345/82, 345/905, 345/903, 348/794, 348/790, 348/800, 348/801, 351/158, 349/61, 349/62, 349/64
• US Class Current: 345/8
• CPC Class Codes: G02B 2027/011 comprising device for correcting geometrical aberrations, distortion
• CPC Class Codes: G02B 2027/0132 comprising binocular systems
• CPC Class Codes: G02B 2027/0138 comprising image capture systems, e.g. camera
• CPC Class Codes: G02B 2027/0143 the two eyes not being equipped with identical nor symmetrical optical devices
• CPC Class Codes: G02B 2027/0154 with movable elements
• CPC Class Codes: G02B 2027/0156 with optionally usable elements
• CPC Class Codes: G02B 2027/0158 with adjustable nose pad
• 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 2027/0187 slaved to motion of at least a part of the body of the user, e.g. head, eye
• 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 5/18 Diffraction gratings holographic optical elements G02B5/32, G03H; integrally combined with optical fibres G02B6/02057; for coupling light guides G02B6/34; integrally combined with optical integrated light guides G02B6/12; grating systems G02B27/44
• CPC Class Codes: G02B 5/30 Polarising elements light-modulating devices with active elements G02F1/00
• CPC Class Codes: G02B 7/12 Adjusting pupillary distance of binocular pairs

Abstract

A compact, light weight head mounted display in which a pair of matrix display elements are mounted within a housing. The display utilizes a pair of arms or stems that are rotatable mounted to the housing such that the user can pivot each arm from a folded position into an open position. The arms can be spring mounted onto the housing to secure the display to the user'"'"'s head and can also incorporate earphones that can be retracted into each arm when not in use.

Claims

1. A head mounted display device comprising;

a housing for holding a first matrix display and a second matrix display relative to the head of a display user, the housing having a first aperture through which the first matrix display can be viewed and a second aperture through which the second matrix display can be viewed, each matrix display including a backlight source, a light diffuser, an active matrix liquid crystal display and a lens that are aligned along a common linear axis with an eye of a user, each backlight source directing light along each respective common linear axis through a respective diffuser, display and lens;

a mounting frame within the housing such that each matrix display slides relative to the mounting frame to adjust a distance between the first matrix display and the second matrix display;

a first pair of hinge mounted support elements that are both rotatable between respective closed positions and respective open positions such that the pair of support elements can be fitted about the head of the user when both support elements are in the respective open positions; and

a connector mounted on the display device that is connected to the first matrix display and the second matrix display to deliver a video signal from an external video source.

2. The head mounted display device of claim 1 further comprising a second pair of hinge mounted support elements, each being mounted to one of the first pair of hinge mounted support elements.

3. The head mounted display device of claim 1 wherein the first matrix display and the second matrix display are connected to a driver circuit mounted to the housing.

4. The head mounted display device of claim 1 further comprising a spring tension mount which imparts a force tending to move each support element from the open position to the closed position.

5. The head mounted display device of claim 1 further comprising a pair of audio transducers wherein each audio transducer is moveably mounted in a support element.

6. The head mounted display device of claim 1 further comprising a moveable nose bridge mounted on the housing.

7. The head mounted display device of claim 1 wherein the first and second matrix displays have a diagonal display length of about 0.7 inches.

8. The head mounted display device of claim 1 further comprising a flexible sleeve for securing each support element to the user'"'"'s ear.

9. The head mounted display device of claim 1 further comprising an optical system, the optical system having a first lens positioned between the first matrix display and the first aperture and a second lens positioned between the second matrix display and the second aperture.

10. The head mounted display of claim 1 further comprising a video control circuit mounted within the display device.

11. The head mounted display of claim 10, further comprising an adjustable controller mounted on the display device to adjust a control signal delivered by the video control circuit to the first and second matrix displays.

12. The head mounted display of claim 1 further comprising a display controller for adjusting a distance between the first matrix display and the second matrix display.

13. The head mounted display device of claim 1 further comprising a reflector mounted adjacent to each backlight source.

14. The head mounted display device of claim 1 wherein the backlight source is a multicolor light source.

15. The head mounted display device of claim 14 wherein the backlight source is sequentially operated to successively generate each color.

16. A head mounted display device comprising;

a housing for holding a first matrix display and a second matrix display relative to the head of a display user, the first matrix display having a first backlight source directing light through a first light diffuser, the first display and a first lens along a first linear viewing axis to an eye of the user and the second matrix display having a second backlight source directing light through a second light diffuser, the second display and a second lens along a second linear viewing axis to an eye of the user;

a first pair of hinge mounted support elements that are both rotatable between respective closed positions and respective open positions such that the pair of support elements can be fitted about the head of the user when both support elements are in the respective open positions;

a mounting frame within the housing such that each matrix display slides relative to the mounting frame to adjust a distance between the first matrix display and the second matrix display;

a pair of audio transducers, each audio transducer being mounted to one of the hinge mounted support elements such that each transducer can deliver an acoustic signal to an ear of the user; and

a connector mounted on the display device that is connected to the first matrix display and the second matrix display to deliver a video signal from an external video source, the connector being connected to both audio transducers to deliver an audio signal from an external audio source.

17. The head mounted display device of claim 16 wherein the first matrix display and the second matrix display are both active matrix liquid crystal displays.

18. The head mounted display device of claim 16 further comprising a spring tension mount which imparts a force tending to move each support element from the open position against the head of the user.

19. The head mounted display device of claim 16 wherein each audio transducer is moveably mounted in a support element.

20. The head mounted display device of claim 16 further comprising an optical system, the optical system having a first lens positioned adjacent the first matrix display and a second lens positioned adjacent the second matrix display.

21. The head mounted display of claim 16 further comprising a video control circuit mounted within the display device.

22. The head mounted display of claim 21 further comprising a manually adjustable controller mounted on the display device to adjust a control signal delivered by the video control circuit to the first and second matrix displays.

23. The head mounted display of claim 16 further comprising a display controller for adjusting a distance between the first matrix display and the second matrix display.

24. The head mounted display device of claim 16 further comprising a control circuit for controlling the first and second backlight sources.

25. The head mounted display of claim 16 further comprising an audio control circuit mounted within the device and an audio controller to provide manual adjustment of the audio signal.

26. The head mounted display device of claim 16 wherein the backlight source is a multicolor light source.

27. The head mounted display device of claim 26 wherein the backlight source is sequentially operated to successively generate each color.

28. A head mounted display device comprising:

a mounting frame that is stationary relative to the head of a display user;

an active matrix liquid crystal display mounted to a display holder such that the display can be positioned with a lens, the display having a ribbon connector to a display circuit, a backlight source and a light diffuser along a single common linear optical axis extending through the lens to an eye of the user, the backlight source directing light along the common linear optical axis through the light diffuser, the display and the lens to the eye of the user; and

a rail on the mounting frame such that the display holder slides along the rail relative to the stationary frame in a direction transverse to the linear optical axis to laterally position the display relative to the eye of the user.

29. The head mounted display device of claim 28 further comprising an active matrix display driving circuit mounted to the frame.

30. The head mounted display device of claim 28 further comprising a backlight driver circuit mounted to the frame.

31. The head mounted display device of claim 28 further comprising a pair of audio transducers.

32. The head mounted display device of claim 28 wherein the backlight source is a multicolor light source.

33. The head mounted display device of claim 32 wherein the backlight source is sequentially operated to successively generate each color.

34. A head mounted display device comprising:

a mounting frame that is stationary relative to the head of a display user;

an active matrix liquid crystal display panel mounted to a display holder, the display panel having a ribbon connector to a display circuit;

a lens, a backlight source and a light diffuser positioned along a single common linear optical axis extending through the display panel to an eye of the user such that light from the backlight is directed through the light diffuser and the display to form an image that is directed through the lens along the common linear optical axis;

a rail on the mounting frame such that the display holder slides along the rail relative to the stationary frame in a direction transverse to the linear optical axis to position the display relative to the eye of the user; and

an active matrix display driving circuit mounted to the frame.

35. The head mounted display device of claim 34 further comprising a backlight driver circuit mounted to the housing.

36. The head mounted display device of claim 34 further comprising a flexible cable extending from the display holder to the frame to deliver video signals from a connector mounted to the frame to the matrix display.

38. The head mounted display device of claim 34 wherein the backlight source is a multicolor light source.

39. The head mounted display device of claim 38 wherein the backlight source is sequentially operated to successively generate each color.

37. The head mounted display device of 34 wherein the active matrix driving circuit is formed on the active matrix display panel.

40. A head mounted display device comprising:

a housing;

a matrix display carried by the housing and connected to a display circuit;

the housing having an aperture through which the matrix display can be viewed;

a receiver and an antenna for receiving a signal for displaying on the matrix display, the receiver being connected to the display circuit; and

the matrix display including a backlight source, a light diffuser, an active matrix liquid crystal display, and a lens that are aligned along a common linear axis extending to an eye of a user, the backlight source directing light along the common linear axis through the diffuser, the display and the lens.

41. A display device as in claim 40 further comprising a reflector mounted adjacent to the backlight source.

42. The display device as in claim 40 wherein the multicolor light source is red, blue, and green.

43. A display device as in claim 42 wherein the backlight source is sequentially operated to successively generate each color.

44. A method of displaying an image on a matrix display adapted for viewing by a user, comprising the following steps:

providing a housing for holding the matrix display, the housing having an aperture through which the matrix display can be viewed, the matrix display including a red, blue, and green backlight source, a light diffuser, an active matrix liquid crystal display and a lens that are aligned along a common linear axis;

receiving a video signal with a receiver and an antenna;

operating a display control circuit connected to the matrix display to display an image on the display;

simultaneously directing light from the backlight source along the common linear axis through the diffuser, display and lens by operating sequentially a multicolor light source to generate each color; and

aligning the common linear axis with an eye of the user.