Head mount display

• US 8,400,371 B2
• Filed: 04/27/2009
• Issued: 03/19/2013
• Est. Priority Date: 12/24/2002
• Status: Active Grant

• Current Assignee: Nikon Corporation
• Original Assignee: Nikon Corporation
• Inventors: Kato, Shigeru, Otsuki, Masaki, Miyake, Nobuyuki, Chiaki, Kenzo
• Primary Examiner(s): Mengistu, Amare
• Assistant Examiner(s): STEPP JONES, SHAWNA T
• Application Number:
  US12/430,637
• Publication Number:
  US 20090243970A1
• Time in Patent Office: 1,422 Days
• Field of Search: 345/8
• US Class Current: 345/8
• CPC Class Codes: G02B 2027/0156 with optionally usable elements
• CPC Class Codes: G02B 27/0176 characterised by mechanical features

Abstract

The head mounted display of the present invention has a display part for displaying images to the wearer, a supporting part which supports the display part, which is fed out into a position in front of as eye from a position that is not located in front of the face, and which is moved from this position in front of as eye into this position that is not located in front of the face, and a mounting part which holds this supporting part, and which is mounted on the wearer in a position that is not located in front of the face, and is constructed so that the supporting part can move past the side of the head along the contour of the head. As a result, a display device is produced which is relatively free of unsightliness with respect to the wearer.

Claims

1. A head mounted display comprising:

a display part for displaying images to a wearer, the display part including a two-dimensional display element and an ocular optical system that forms a false image corresponding to a display screen of the two-dimensional display element, wherein the display part controls image data that is displayed on the two-dimensional display element in accordance with a positional relationship between the two-dimensional display element and the wearer,

a mounting part which holds the display part and which is mountable on the wearer in a position other than a position in front of the face of the wearer, wherein the mounting part mounts the display part on the head of the wearer so that a position where the false image is formed is substantially in front of an eye of the wearer,

a circuit part which displays images on the display screen of the two-dimensional display element, and which is configured to alter a display magnification rate of the images on the display screen,

an adjustment mechanism for adjusting a positional relationship between the eve of the wearer and the display part, wherein the adjustment mechanism is disposed in the mounting part, and

a measurement unit, which is provided on the display part, for measuring a distance between the eye of the wearer and the display part to acquire data relating to a variation in the distance,

wherein the circuit part alters the display magnification rate in accordance with the data acquired by the measurement unit.

2. The head mounted display according to claim 1, further comprising an input unit for inputting instructions from the wearer, wherein the circuit part alters the display magnification rate in accordance with the instructions that are input via the input unit.

3. The head mounted display according to claim 1, further comprising:

a driving unit for causing displacement of a distance between the two-dimensional display element and the ocular optical system in relative terms,

a storage unit for storing information relating to the distance between the two-dimensional display element and the ocular optical system, and

a control unit for controlling the driving unit based on the information relating to the distance between the two-dimensional display element and the ocular optical system stored in the storage unit.

4. The head mounted display according to claim 3, further comprising a detection unit for detecting an up and down in the display part, and wherein, in accordance with an output of the detection unit, the control unit obtains information relating to the distance between the two-dimensional display element and the ocular optical system stored in the storage unit, and sets the driving unit.

5. The head mounted display according to claim 4, further comprising a setting unit for setting the distance between the two-dimensional display element and the ocular optical system, and wherein, in accordance with an output of the setting unit, the control unit obtains information relating to the distance between the two-dimensional display element and the ocular optical system stored in the storage unit, and sets the driving unit.

6. The head mounted display according to claim 3, further comprising a setting unit for setting the distance between the two-dimensional display element and the ocular optical system, and wherein, in accordance with an output of the setting unit, the control unit obtains information relating to the distance between the two-dimensional display element and the ocular optical system stored in the storage unit, and sets the driving unit.

7. The head mounted display according to claim 1, wherein the mounting part directly holds the display part.

8. The head mounted display according to claim 1, wherein the mounting part indirectly holds the display part.

9. The head mounted display according to claim 1, wherein the display part further includes:

a display device part which includes the two-dimensional display element and a first holding frame that holds the two-dimensional display element, and

an optical lens part which includes the ocular optical system that forms the false image corresponding to the display screen of the two-dimensional display element, and a second holding frame that holds the ocular optical system,

wherein the first holding frame is supported on the second holding frame such that the first holding frame can move in a direction of an optical axis of the ocular optical system.