VIRTUAL IMAGE DISPLAY DEVICE
First Claim
1. A virtual image display device comprising:
- a light source unit that emits a light beam;
a polarization switching unit that switches a polarization direction of the light beam emitted from the light source unit between a first polarization direction and a second polarization direction;
an image generation unit that generates image light from the light beam emitted from the light source unit;
an optical path unit including a first optical path through which the light beam having the first polarization direction travels and a second optical path through which the light beam having the second polarization direction travels, optical path length of the second optical path being longer than optical path length of the first optical path; and
a projection unit that projects the light beam emerging from the optical path unit, wherein;
an image that is displayed as a virtual image is projected at a first distance from an observer with the light beam that has traveled through the first optical path of the optical path unit, andan image that is displayed as another virtual image is projected at a second distance farther than the first distance from the observer with the light beam that has traveled through the second optical path of the optical path unit.
1 Assignment
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Accused Products
Abstract
A virtual image display device includes a light source unit, a polarization switching unit, an image generation unit, an optical path unit and a projection unit. The polarization switching unit switches a polarization direction of a light beam emitted from the light source unit. The optical path unit includes a first optical path through which the light beam having the first polarization direction travels and a second optical path through which the light beam having the second polarization direction travels. A first virtual image is displayed at a first distance with the light beam that has traveled through the first optical path. A second virtual image is displayed at a second distance farther than the first distance with the light beam that has traveled through the second optical path.
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Citations
15 Claims
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1. A virtual image display device comprising:
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a light source unit that emits a light beam; a polarization switching unit that switches a polarization direction of the light beam emitted from the light source unit between a first polarization direction and a second polarization direction; an image generation unit that generates image light from the light beam emitted from the light source unit; an optical path unit including a first optical path through which the light beam having the first polarization direction travels and a second optical path through which the light beam having the second polarization direction travels, optical path length of the second optical path being longer than optical path length of the first optical path; and a projection unit that projects the light beam emerging from the optical path unit, wherein; an image that is displayed as a virtual image is projected at a first distance from an observer with the light beam that has traveled through the first optical path of the optical path unit, and an image that is displayed as another virtual image is projected at a second distance farther than the first distance from the observer with the light beam that has traveled through the second optical path of the optical path unit. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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3. (canceled)
Specification