Optical projection system and image display device having the same
First Claim
Patent Images
1. An optical projection system to enlarge an image in an image display device, the optical projection system comprising:
- a series of lenses and reflectors to refract light beams of an image by converging and diverging the light beams of the image and by bending the light beams of the image, respectively, wherein the series of lenses and reflectors distorts the image to have a pin cushion-like shape distortion; and
a polynomial reflector to receive the image from the series of lenses and reflectors, to compensate for the pin cushion-like shape distortion introduced by the series of lenses and reflectors by creating a barrel-like shape distortion of the image, to enlarge the image, and to project the enlarged image toward a screen.
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Abstract
An optical projection system which creates pincushion distortion of an image and then creates a barrel distortion of the pincushion-distorted image to compensate for the pincushion distortion and then projects an enlarged image without substantial distortion onto an image display surface. An embodiment includes a polynomial reflector to compensate for the pincushion distortion, to enlarge an image, and to project the enlarged image toward a screen.
15 Citations
25 Claims
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1. An optical projection system to enlarge an image in an image display device, the optical projection system comprising:
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a series of lenses and reflectors to refract light beams of an image by converging and diverging the light beams of the image and by bending the light beams of the image, respectively, wherein the series of lenses and reflectors distorts the image to have a pin cushion-like shape distortion; and a polynomial reflector to receive the image from the series of lenses and reflectors, to compensate for the pin cushion-like shape distortion introduced by the series of lenses and reflectors by creating a barrel-like shape distortion of the image, to enlarge the image, and to project the enlarged image toward a screen. - View Dependent Claims (2, 3, 4)
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5. An optical projection system to enlarge an image in an image display device, the optical projection system comprising:
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a refraction part to introduce a pin cushion-like shape distortion to an image received from a lighting system; and a reflection part to receive the image from the refraction part and to introduce a barrel-like shape distortion to the image that compensates for the pin cushion-like shape distortion while expanding the image. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. An image display device, comprising:
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a lighting system to provide light beams; a micro display part to modulate the light beams provided by the lighting system to create an image; a series of lenses and reflectors to introduce a fist pin cushion-like shape distortion by, respectively, refracting and bending the light beams of the image received from the micro display part; a polynomial reflector to receive the light beams of the image from the series of lenses and reflectors and to introduce a barrel-like shape distortion that compensates for the pin cushion-like shape distortion while expanding the image; and a screen to receive the expanded image substantially without distortion. - View Dependent Claims (13, 14, 15)
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16. A method of projecting an image onto a screen in an image display device with an optical projection system, the method comprising:
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receiving an image from an image forming part; creating pincushion distortion in the image in a refraction part; and expanding the image while compensating for the pincushion distortion by creating a barrel distortion in the pincushion distorted image and projecting the expanded image toward the screen with a reflection part. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. An optical projection system to enlarge an image in an image display device, the optical projection system comprising:
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a series of lenses and reflectors to refract light beams of an image by converging and diverging the light beams of the image and by bending the light beams of the image, respectively; and a polynomial reflector to receive the image from the series of lenses and reflectors, to compensate for distortion introduced by the series of lenses and reflectors, to enlarge the image, and to project the enlarged image toward a screen, wherein the series of lenses and reflectors comprises; a first one or more lenses to converge the light beams of the image; a second one or more lenses to diverge the light beams received from the first one or more lenses; a first reflector to reflect the light beams of the image received from the second one or more lenses from a first direction to a second direction substantially perpendicular to the first direction; a third one or more lenses to converge the light beams of the image received from the first reflector; a fourth one or more lenses to diverge the light beams of the image received from the third one or more lenses; and a second reflector to reflect the light beams of the image received from the fourth one or more lenses to the reflection part in a third direction opposite to the first direction. - View Dependent Claims (24)
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25. An optical projection system to enlarge an image in an image display device, the optical projection system comprising:
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a series of lenses and reflectors to refract light beams of an image by converging and diverging the light beams of the image and by bending the light beams of the image, respectively; and a polynomial reflector to receive the image from the series of lenses and reflectors, to compensate for distortion introduced by the series of lenses and reflectors, to enlarge the image, and to project the enlarged image toward a screen, wherein the series of lenses comprises; a first group of lenses and a second group of lenses perpendicular to the first group of lenses.
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Specification