Scanned beam display with adjustable accommodation
First Claim
1. A scanning display apparatus, comprising:
- an image signal source operative to produce an image signal;
a focal control signal source generating a focal control signal;
a light emitter coupled to the image signal source and responsive to the image signal to emit light;
a lens which receives light from the light emitter and which passes exiting light, the exiting light having a focal distance; and
a controller responsive to the focal control signal for controlling distance between the light emitter and the lens, wherein the focal distance of the light exiting the lens varies with the distance between the light emitter and the lens.
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Accused Products
Abstract
A scanning beam display controls the curvature of scanning light wave impinging on the eye to simulate image points of differing depth. To simulate an object at a far distance the generated light waves are flatter. To simulate closer objects, the light wave curvature increases. When changing the curvature of the light waves, the eye responds by altering its focus. The curvature of the light waves thus determines the apparent focal distance from the eye to the virtual object. To vary the curvature, either a variable focus lens or a variable index of refraction device is used. Alternatively, a moving point source is used. The generated apparent distance of a virtual object is correlated to a detected distance in a background field of view. Intensity of the virtual object is correlated to detected intensity of background light.
14 Citations
10 Claims
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1. A scanning display apparatus, comprising:
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an image signal source operative to produce an image signal;
a focal control signal source generating a focal control signal;
a light emitter coupled to the image signal source and responsive to the image signal to emit light;
a lens which receives light from the light emitter and which passes exiting light, the exiting light having a focal distance; and
a controller responsive to the focal control signal for controlling distance between the light emitter and the lens, wherein the focal distance of the light exiting the lens varies with the distance between the light emitter and the lens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A scanning display apparatus, comprising:
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an image signal source operative to produce an image signal;
a focal control signal source generating a focal control signal;
a light emitter coupled to the image signal source and responsive to the image signal to emit light;
a mirror receiving the light from the light emitter, the mirror movable about an axis in response to the focal control signal to vary an angle at which the light is reflected from the mirror; and
a lens which receives light from the mirror and which passes exiting light, the exiting light having a focal distance, wherein the angle of the mirror determines the focal distance of light exiting the lens. - View Dependent Claims (10)
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Specification