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US 2015/0085332 A1Published application
Image display apparatus
AssigneeAlps Electric Co., Ltd.
InventorTORU YOSHIDA
Life of this patent
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Abstract
An image display apparatus includes at least one light source to emit coherent light, a holographic optical element to diffract the coherent light from the light source to produce image light, an optical mechanism to guide the image light from the holographic optical element, at least one detection unit to detect the intensity of the image light, and an adjustment unit to adjust the power of the light source based on the result of detection by the detection unit. An image based on the image light is observed by a viewer.
Claims2
An image display apparatus comprising:
- at least one light source that emits coherent light;
- a holographic optical element that diffracts the coherent light from the light source to produce image light;
- an optical mechanism that guides the image light from the holographic optical element;
- at least one detection unit that detects intensity of the image light;
- and
- an adjustment unit that adjusts power of the light source based on a result of detection by the detection unit,
- wherein an image based on the image light is observable by a viewer.
4 more elements
Dependencies are inferred from the claim text.