IP Library › Granted Patent US 8,912,981
Granted Patent B2
US 8,912,981 · App. 13/966,802 · Granted Dec 16, 2014

Image display apparatus and head mounted display

Inventor: Hiroshi Mukawa (Kanagawa, JP)
Assignee: Sony Corporation
G02B27/017G02B2027/0123G02B27/0172G02B6/00G02B2027/0161G02B2027/0154
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Quick Facts
Patent No.
US 8,912,981
App. No.
13/966,802
Granted
Dec 16, 2014
Kind
B2
Abstract

An image display apparatus includes: an image forming device; an optical system converting light emitted from the image forming device into parallel light; and an optical device to which the light beams converted into the parallel light by the optical system enter, in which the light beams are guided, and from which the light beams are emitted, wherein a central light beam emitted from the center of the image forming device, passing through the nodal point of the optical system and entering the optical device at an optical device center point intersects an XY plane defined by an X axis that passes through the optical device center point, and is parallel to the axis direction of the optical device and a Y axis that passes through the optical device center point, and coincides with the normal axis of the optical device at angles other than 0 degree.

Claims (50)

1. A head mounted display comprising:

(a) a frame shaped like glasses to be worn on the head of an observer; and

(b) an image display apparatus attached to the frame, the image display apparatus including

an image forming device configured to emit light; and an optical device configured to guide and emit the light,

wherein when a point where a central light beam that is emitted from the center of the image forming device enters the optical device is defined as an optical device center point, an axis that passes through the optical device center point, and is parallel to the axis direction of the optical device is defined as an X-axis, and an axis that passes through the optical device center point, and coincides with the normal axis of the optical device is defined as a Y-axis,

the central light beam intersects the XY plane at angles other than 0 degree.

2. The head mounted display according to claim 1 ,

wherein the image display apparatus is pivotally attached to the frame, with a virtual straight line connecting the centers of two eyeballs of the observer who observes the image display apparatus as a pivot axis.

3. The head mounted display according to claim 2 ,

wherein at least one of the image forming device and the optical device is pivotally attached to the frame.

4. The head mounted display according to claim 1

wherein the central light beam is included in the YZ plane.

5. The head mounted display according to claim 1 ,

wherein assuming that the XY plane coincides with the horizontal plane, the angle θ at which the central light beam intersects the XY plane is an elevation angle.

6. The head mounted display according to claim 5 ,

wherein the angle θ is under 5 degrees.

7. The head mounted display according to claim 1 ,

wherein when an observer views a horizontally located object, a central light beam that is emitted from the optical device and enters the eyes of the observer forms a depression angle.

8. The head mounted display according to claim 1 ,

wherein the frame is formed by a front portion arranged at the front of an observer, and two temple portions pivotally attached to both ends of the front portion via hinges.

9. The head mounted display according to claim 8 ,

wherein at least one of the image forming device, and the optical device is pivotally attached to the frame.

10. The head mounted display according to claim 8 ,

wherein when an observer views a horizontally located object, a central light beam that is emitted from the optical device and enters the eyes of the observer forms a depression angle.

11. A head mounted display comprising:

(a) a frame shaped like glasses to be worn on the head of an observer; and

(b) an image display apparatus attached to the frame, the image display apparatus including

an image forming device configured to emit light; and an optical device configured to guide and emit the light, wherein a central light beam that is emitted from the center of the image forming device is tilted with respect to a normal axis of the optical device, and

wherein the central light beam guided and emitted from the optical device is tilted with respect to a horizontal plane.

12. The head mounted display according to claim 11 ,

wherein when an observer views a horizontally located object, a central light beam that is emitted from the optical device and enters the eyes of the observer forms a depression angle.

13. The head mounted display according to claim 11 ,

wherein the image display apparatus is pivotally attached to the frame, with a virtual straight line connecting the centers of two eyeballs of the observer who observes the image display apparatus as a pivot axis.

14. The head mounted display according to claim 13 ,

wherein at least one of the image forming device and the optical device is pivotally attached to the frame.

15. The head mounted display according to claim 11 ,

wherein when an observer views a horizontally located object, a central light beam that is emitted from the optical device and enters the eyes of the observer forms a depression angle.

16. The head mounted display according to claim 11 ,

wherein the frame is formed by a front portion arranged at the front of an observer, and two temple portions pivotally attached to both ends of the front portion via hinges.

17. The head mounted display according to claim 16 ,

wherein at least one of the image forming device, and the optical device is pivotally attached to the frame.

18. A head mounted display comprising:

(a) a frame shaped like glasses to be worn on the head of an observer; and

(b) an image display apparatus attached to the frame, the image display apparatus including

an image forming device configured to emit light; and an optical device configured to guide and emit the light, wherein a central light beam that is emitted from the center of the image forming device is tilted with respect to a normal axis of the optical device, and

wherein the central light beam is configured to guide in the optical device diagonally.

19. An image display apparatus comprising:

an image forming device configured to emit light; and an optical device configured to guide and emit the light,

wherein when a point where a central light beam that is emitted from the center of the image forming device enters the optical device is defined as an optical device center point, an axis that passes through the optical device center point, and is parallel to the axis direction of the optical device is defined as an X-axis, and an axis that passes through the optical device center point, and coincides with the normal axis of the optical device is defined as a Y-axis,

the central light beam intersects the XY plane at angles other than 0 degree.

Priority Claims (2)
JP 2009-199567 · Aug 31, 2009 · national
JP 2009-280133 · Dec 10, 2009 · national
Continuity (2)
Continuation 12805637 · Aug 11, 2010
Related Publication 20130328748A1 · Dec 12, 2013