Light reflecting member, light beam extension device, image display device, and optical device
First Claim
1. An image display device comprising:
- an image generating device;
a light guide unit arranged to guide light provided by the image generating device and to emit the guided light; and
a reflecting mirror, having a first area, a second area, and a central area, disposed in an optical path between the image generating device and the light guide unit, wherein;
at least a portion of a cross-section of the reflecting mirror has a substantially sawtooth shape;
the central area is adjacent to the first area on a first edge and adjacent to the second area on a second edge;
a first side of the substantially sawtooth shape has a first slope, and is disposed in the first area adjacent to the first edge;
a second side of the substantially sawtooth shape has a second slope different from the first slope, and is disposed in the first area adjacent to the first side at a recessed portion of the substantially sawtooth shape at a 90 degree angle;
a third side of the substantially sawtooth shape has a third slope, and is disposed in the second area adjacent to the second edge;
a fourth side of the substantially sawtooth shape has a fourth slope different from the third slope, and is disposed in the second area adjacent to the third side at a recessed portion of the substantially sawtooth shape at a 90 degree angle;
the first side has a first length and the second side has a second length, wherein the first length is greater than the second length; and
the third side has a third length and the fourth side has a fourth length, wherein the third length is greater than the fourth length.
1 Assignment
0 Petitions
Accused Products
Abstract
An image display device includes an image generating device, a light guide unit which includes a light guide plate and first and second deflection sections, and a light beam extension device which extends light incident from the image generating device, along a Z direction when an incident direction of light incident on the light guide plate is set to be an X direction and a direction of propagation of light in the light guide plate is set to be a Y direction, and emits the light to the light guide unit, wherein the light beam extension device includes a first reflecting mirror on which light from the image generating device is incident, and a second reflecting mirror which emits light incident from the first reflecting mirror to the light guide unit, and each of the first and second reflecting mirrors has a light reflecting surface having a sawtooth-shaped cross-sectional shape.
74 Citations
18 Claims
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1. An image display device comprising:
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an image generating device; a light guide unit arranged to guide light provided by the image generating device and to emit the guided light; and a reflecting mirror, having a first area, a second area, and a central area, disposed in an optical path between the image generating device and the light guide unit, wherein; at least a portion of a cross-section of the reflecting mirror has a substantially sawtooth shape; the central area is adjacent to the first area on a first edge and adjacent to the second area on a second edge; a first side of the substantially sawtooth shape has a first slope, and is disposed in the first area adjacent to the first edge; a second side of the substantially sawtooth shape has a second slope different from the first slope, and is disposed in the first area adjacent to the first side at a recessed portion of the substantially sawtooth shape at a 90 degree angle; a third side of the substantially sawtooth shape has a third slope, and is disposed in the second area adjacent to the second edge; a fourth side of the substantially sawtooth shape has a fourth slope different from the third slope, and is disposed in the second area adjacent to the third side at a recessed portion of the substantially sawtooth shape at a 90 degree angle; the first side has a first length and the second side has a second length, wherein the first length is greater than the second length; and the third side has a third length and the fourth side has a fourth length, wherein the third length is greater than the fourth length. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification