Image display device
First Claim
1. A head mounted display device comprising:
- a first image display device for a first eye, the first image display device including a first image forming device and a first optical device, the first optical device includinga first light guide plate having opposed front and rear surfaces and extending lengthwise along a first direction,a first diffractive optical member of the first optical device for reflecting light input to the first light guide plate and which is disposed on a rear surface of the first light guide plate, anda second diffractive optical member of the first optical device for reflecting light propagated within the first light guide plate and which is disposed on the rear surface of the first light guide plate; and
a second image display device for a second eye, the second image display device including a second image forming device and a second optical device, the second optical device includinga second light guide plate having opposed front and rear surfaces and extending lengthwise along a second direction that intersects with the first direction,a third diffractive optical member of the second optical device for reflecting light input to the second light guide plate and which is disposed on a rear surface of the second light guide plate, anda fourth diffractive optical member of the second optical device for reflecting light propagated within the second light guide plate and which is disposed on the rear surface of the second light guide plate,wherein the first image forming device is positioned over the front surface of the first light guide plate, and the second image forming device is positioned over the front surface of the second light guide plate,wherein the first image forming device and the first optical device are parallel to the first direction in a top view, the second image forming device and the second optical device are parallel to the second direction in the top view, a center of the first image forming device tilts from a center line of the first diffractive optical member perpendicular to the first direction, and a center of the second image forming device tilts from a center line of the third diffractive optical member perpendicular to the second direction,wherein a thickness of the second diffractive optical member is thinner than a thickness of the first diffractive optical member, andwherein a thickness of the fourth diffractive optical member is thinner than a thickness of the third diffractive optical member.
1 Assignment
0 Petitions
Accused Products
Abstract
An image display device includes an image forming device, collimating optical system, and optical device, with the optical device including a light guide plate, first diffraction grating member and second diffraction grating member which are made up of a volume hologram diffraction grating, and with central light emitted from the pixel of the center of the image forming device and passed through the center of the collimating optical system being input to the light guide plate from the near side of the second diffraction grating member with a certain angle. Thus, the image display device capable of preventing occurrence of color irregularities, despite the simple configuration, can be provided.
12 Citations
10 Claims
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1. A head mounted display device comprising:
- a first image display device for a first eye, the first image display device including a first image forming device and a first optical device, the first optical device including
a first light guide plate having opposed front and rear surfaces and extending lengthwise along a first direction, a first diffractive optical member of the first optical device for reflecting light input to the first light guide plate and which is disposed on a rear surface of the first light guide plate, and a second diffractive optical member of the first optical device for reflecting light propagated within the first light guide plate and which is disposed on the rear surface of the first light guide plate; and a second image display device for a second eye, the second image display device including a second image forming device and a second optical device, the second optical device including a second light guide plate having opposed front and rear surfaces and extending lengthwise along a second direction that intersects with the first direction, a third diffractive optical member of the second optical device for reflecting light input to the second light guide plate and which is disposed on a rear surface of the second light guide plate, and a fourth diffractive optical member of the second optical device for reflecting light propagated within the second light guide plate and which is disposed on the rear surface of the second light guide plate, wherein the first image forming device is positioned over the front surface of the first light guide plate, and the second image forming device is positioned over the front surface of the second light guide plate, wherein the first image forming device and the first optical device are parallel to the first direction in a top view, the second image forming device and the second optical device are parallel to the second direction in the top view, a center of the first image forming device tilts from a center line of the first diffractive optical member perpendicular to the first direction, and a center of the second image forming device tilts from a center line of the third diffractive optical member perpendicular to the second direction, wherein a thickness of the second diffractive optical member is thinner than a thickness of the first diffractive optical member, and wherein a thickness of the fourth diffractive optical member is thinner than a thickness of the third diffractive optical member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- a first image display device for a first eye, the first image display device including a first image forming device and a first optical device, the first optical device including
Specification