Projection display device for projecting an input unit image
First Claim
1. A projection display device comprising:
- a light source unit configured to emit lights;
a light dividing unit configured to divide a first projection light and a second projection light from the lights emitted by the light source unit;
an image projection unit configured to project an image using the first projection light from the light dividing unit; and
a virtual input unit configured to project an input unit image using the second projection light from the light dividing unit,wherein the path direction of the first projection light is different from the path direction of the second projection light,wherein the light dividing unit includes;
a first optical element arranged at a position where a first light and a second light from the light source unit cross each other; and
a second optical element arranged at a position where the first light and a third light from the light source unit cross each other,wherein the first optical element and the second optical element are arranged in the path direction of the first projection light, andwherein the path direction of the first projection light and the path direction of the second projection light are parallel to each other.
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Abstract
A projection display device (100) capable of providing a virtual keyboard function to the user, using a light source of a pico projector, is discussed. According to an embodiment, the projection display device includes a light source unit (110) configured to emit lights; a light combining unit (120) configured to generate a leakage light from the lights emitted by the light source (110) unit and to selectively combine the lights from the light source unit (110); an image projection unit (130) configured to project an image using the combined light from the light combining unit (120); and a virtual input unit (140) configured to project an input unit image (150) using the leakage light from the light combining unit (120).
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Citations
16 Claims
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1. A projection display device comprising:
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a light source unit configured to emit lights; a light dividing unit configured to divide a first projection light and a second projection light from the lights emitted by the light source unit; an image projection unit configured to project an image using the first projection light from the light dividing unit; and a virtual input unit configured to project an input unit image using the second projection light from the light dividing unit, wherein the path direction of the first projection light is different from the path direction of the second projection light, wherein the light dividing unit includes; a first optical element arranged at a position where a first light and a second light from the light source unit cross each other; and a second optical element arranged at a position where the first light and a third light from the light source unit cross each other, wherein the first optical element and the second optical element are arranged in the path direction of the first projection light, and wherein the path direction of the first projection light and the path direction of the second projection light are parallel to each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification