Visual display system and exposure control apparatus
First Claim
Patent Images
1. A visual display system, comprising:
- a light source emitting a light beam;
an image forming surface having a first and second dimension;
a spatial light modulator including a plurality of linearly arranged controllable elements, said controllable elements modulating said light beam to form an image line, said image line representing a line of a image along said first dimension; and
an optical scanning device scanning said image line across a portion of said image forming surface only in a direction of said second dimension.
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Abstract
A visual display system in which light from a light source is modulated by a spatial light modulator having a plurality of controllable elements arranged in a first dimension. The modulated light is scanned by an optical scanning device along a second dimension to display an image. An exposure control apparatus has a lens, a photoelectric conversion device, and a spatial light modulator. The spatial light modulator varies the amount of light received from the lens and supplied to the photoelectric conversion device, thereby controlling the exposure of the image focused by the lens.
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Citations
33 Claims
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1. A visual display system, comprising:
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a light source emitting a light beam; an image forming surface having a first and second dimension; a spatial light modulator including a plurality of linearly arranged controllable elements, said controllable elements modulating said light beam to form an image line, said image line representing a line of a image along said first dimension; and an optical scanning device scanning said image line across a portion of said image forming surface only in a direction of said second dimension. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A visual display system comprising:
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a light source disposed in a first optical path; an image forming surface disposed in a second optical path; a spatial light modulator disposed in said first and second optical paths and composed of a plurality of controllable elements arranged in a line; an optical scanning device, disposed between said spatial light modulator and said image forming surface, for scanning the light reflected from said spatial light modulator; and an optical shutter disposed on the light emitting side of said light source, said optical shutter being set in an open-state for a period of time equal to one line display period, an image displayed on said image forming surface consists of a plurality of image lines, said line display period is a period of time for said optical scanning device to scan one image line on said image forming surface. - View Dependent Claims (26, 27, 28)
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29. A visual display system comprising:
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a light source disposed in a first optical path; an image forming surface disposed in a second optical path; a spatial light modulator disposed in said first and second optical paths and composed of a plurality of controllable elements arranged in a line; an optical scanning device, disposed between said spatial light modulator and said image forming surface, for scanning the light reflected from said spatial light modulator; and
whereinsaid spatial light modulator controls said controllable elements more than one time within one cycle period of the critical flicker frequency of the human eye.
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30. A visual display system comprising:
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a light source disposed in a first optical path; an image forming surface disposed in a second optical path; a spatial light modulator disposed in said first and second optical paths and composed of a plurality of controllable elements arranged in a line; an optical scanning device, disposed between said spatial light modulator and said image forming surface, for scanning the light reflected from said spatial light modulator; and
whereinsaid light source emits, as said light beam, a pulse light, said pulse light being set in an on-state for a period of time equal to one line display period, an image displayed on said image forming surface consists of a plurality of image lines, said line display period is a period of time for said optical scanning device to scan one image line on said image forming surface; and
whereinsaid spatial light modulator controls said controllable elements more than one time during said on-state.
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31. A visual display system comprising:
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a light source disposed in a first optical path; an image forming surface disposed in a second optical path; a spatial light modulator disposed in said first and second optical paths and composed of a plurality of controllable elements arranged in a line; an optical scanning device, disposed between said spatial light modulator and said image forming surface, for scanning the light reflected from said spatial light modulator; and
whereinthe rotation of said optical scanning device is controlled in such a manner that the scanning section thereof is turned incrementally with an angle equivalent to the angle through which to scan an image line formed by said controllable elements of said spatial light modulator.
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32. An exposure control apparatus comprising:
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a lens for focusing an image light representing an image; a photoelectric conversion device for converting light into an electrical signal; a light source emitting a light beam; a spatial light modulator receiving said image light and said light beam, and having a plurality of controllable elements; and a control unit controlling, individually and simultaneously, the plurality of controllable elements of said spatial light modulator in a first and second switching mode based on said electrical signal output from said photoelectric conversion device, in the first switching mode, said control means switching the states of said controllable elements between a first state, in which said received image light is guided to said photoelectric conversion device, and a second state in which said received image light is not guided to said photoelectric conversion device, and in the second switching mode said control means switching the states of the controllable elements between a third state, in which the received light is guided to said lens, and a fourth state in which said received light beam is not guided to lens. - View Dependent Claims (33)
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Specification