Projection-type display devices with reduced weight and size
First Claim
Patent Images
1. A projection-type display device, comprising:
- a first diode laser set, each diode laser in the first diode laser set including a) a lasing medium in a lasing chamber for producing first light including a first wavelength between about 400 nanometers and about 700 nanometers, b) an output lens for emitting the first light, and c)a photosensor that detects the first light and outputs a signal indicative of the first light;
a second diode laser set, each diode laser in the second diode laser set including a) a lasing medium in a lasing chamber for producing second light including a second wavelength between about 400 nanometers and about 700 nanometers, and b) an output lens for emitting the second light;
at least one optical modulation device configured to selectively transmit the first light and the second light according to video data included in a video signal provided to the at least one optical modulation device;
an optics system arranged to receive the first light and the second light before receipt by the at least one optical modulation device and configured to increase flux area for the first light and the second light before receipt by the at least one optical modulation device; and
a projection lens system configured to project light transmitted by the at least one optical modulation device along a projection path.
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Abstract
Described herein are display devices that provide projection-type video output and use diode lasers to generate light. For example, one set of diode lasers may produce red light, while a second set produces blue light. Optics are employed to expand laser light from its small generated or transmitted flux area to a size suitable for transmission onto the optical modulation device. Another aspect of the invention relates to a redundant laser set to generate light. A redundant laser set includes more lasers than that needed to produce the desired amount of light.
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Citations
19 Claims
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1. A projection-type display device, comprising:
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a first diode laser set, each diode laser in the first diode laser set including a) a lasing medium in a lasing chamber for producing first light including a first wavelength between about 400 nanometers and about 700 nanometers, b) an output lens for emitting the first light, and c)a photosensor that detects the first light and outputs a signal indicative of the first light; a second diode laser set, each diode laser in the second diode laser set including a) a lasing medium in a lasing chamber for producing second light including a second wavelength between about 400 nanometers and about 700 nanometers, and b) an output lens for emitting the second light; at least one optical modulation device configured to selectively transmit the first light and the second light according to video data included in a video signal provided to the at least one optical modulation device; an optics system arranged to receive the first light and the second light before receipt by the at least one optical modulation device and configured to increase flux area for the first light and the second light before receipt by the at least one optical modulation device; and a projection lens system configured to project light transmitted by the at least one optical modulation device along a projection path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A projection-type display device, comprising:
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a red diode laser set, each red diode laser in the red diode laser set including a) a lasing medium in a lasing chamber for producing light including a red wavelength between about 615 nanometers and about 690 nanometers, b) an output lens for emitting the red light, and c) a photosensor that detects the red light and outputs a signal indicative of the red light; a blue diode laser set, each blue diode laser in the blue diode laser set including a) a lasing medium in a lasing chamber for producing light including a blue wavelength between about 420 nanometers and about 500 nanometers, and b) an output lens for emitting the blue light; at least one optical modulation device configured to selectively transmit light including the red wavelength and the light including the blue wavelength according to video data included in a video signal provided to the at least one optical modulation device; an optics system, arranged to receive the light including the red wavelength and the light including the blue wavelength before receipt by the at least one optical modulation device, configured to increase flux area for the light including the red wavelength and the light including the blue wavelength before receipt by the at least one optical modulation device; and a projection lens system configured to project light transmitted by the at least one optical modulation device along a projection path.
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19. A projection-type display device, comprising:
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a red diode laser set, each red diode laser in the red diode laser set including a) a lasing medium in a lasing chamber for producing light including a red wavelength between about 615 nanometers and about 690 nanometers, b) an output lens for emitting the red light, and c) a photosensor that detects the red light and outputs a signal indicative of the red light; a blue diode laser set, each blue diode laser in the blue diode laser set including a) a lasing medium in a lasing chamber for producing light including a blue wavelength between about 420 nanometers and about 500 nanometers, and b) an output lens for emitting the blue light; a third set of lasers, each laser in the third laser set including a) a lasing medium and lasing chamber for producing third light including a third wavelength between about 510 nanometers and about 570 nanometers, and b) an output lens for emitting the third light; at least one optical modulation device configured to selectively transmit light including the red wavelength and the light including the blue wavelength according to video data included in a video signal provided to the at least one optical modulation device; an optics system, arranged to receive light before receipt by the at least one optical modulation device, configured to increase flux area for the light before receipt by the at least one optical modulation device; and a projection lens system configured to project light transmitted by the at least one optical modulation device along a projection path.
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Specification