Method and apparatus for automatically correcting image misalignment arising in a rear-projection LCD television display
First Claim
1. An apparatus for projecting an image, comprising:
- a projector operable to receive a signal representative of an image and to generate light representative of the image;
a lens assembly for receiving from the projector the generated light representative of the image and projecting said generated light;
a display screen onto which the generated light is projected so that the image is visible to a viewer. an image alignment arrangement for adjusting a relative position of the image on the display screen, said image alignment arrangement being operable to project a test image from the projector onto the display screen and including;
at least one sensor located on the display screen for detecting the test image and generating an alignment signal representative of an amount of misalignment of the test image on the display screen; and
a mechanical actuator for adjusting a relative position of the projector in response to said alignment signal so that the test image is properly aligned on the display screen.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and apparatus for projecting an image is provided. The apparatus includes a projector operable to receive a signal representative of an image and to generate light representative of the image. A lens assembly is provided for receiving from the projector the generated light representative of the image and projecting the generated light. The generated light is projected onto a display screen so that the image is visible to a viewer. An image alignment arrangement adjusts a relative position of the image on the display screen. The image alignment arrangement, which is operable to project a test image from the projector onto the display screen, includes at least one sensor located on the display screen for detecting the test image and generating an alignment signal representative of an amount of misalignment of the test image on the display screen. The image alignment arrangement also includes a mechanical actuator for adjusting a relative position of the projector in response to the alignment signal so that the test image is properly aligned on the display screen.
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Citations
34 Claims
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1. An apparatus for projecting an image, comprising:
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a projector operable to receive a signal representative of an image and to generate light representative of the image;
a lens assembly for receiving from the projector the generated light representative of the image and projecting said generated light;
a display screen onto which the generated light is projected so that the image is visible to a viewer. an image alignment arrangement for adjusting a relative position of the image on the display screen, said image alignment arrangement being operable to project a test image from the projector onto the display screen and including;
at least one sensor located on the display screen for detecting the test image and generating an alignment signal representative of an amount of misalignment of the test image on the display screen; and
a mechanical actuator for adjusting a relative position of the projector in response to said alignment signal so that the test image is properly aligned on the display screen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for adjusting a relative position of an image on a screen of a display device, said method comprising the steps of:
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projecting a test image from a projector onto the screen;
detecting a portion of the test image on the screen;
generating, in response to the detected portion of the test image, an alignment signal representative of an amount of misalignment of the test image on the display screen; and
adjusting a relative position of the projector in response to said alignment signal so that the test image is properly aligned on the screen. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A rear-projection television, comprising:
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a projector operable to receive a signal representative of an image and to generate light representative of the image;
a lens assembly for receiving from the projector the generated light representative of the image and projecting said generated light;
at least one mirror receiving the generated light from the lens assembly and reflecting it to the display screen;
a display screen onto which the generated light is projected so that the image is visible to a viewer. an image alignment arrangement for adjusting a relative position of the image on the display screen, said image alignment arrangement being operable to project a test image from the projector onto the display screen and including;
at least one sensor located on the display screen for detecting the test image and generating an alignment signal representative of an amount of misalignment of the test image on the display screen; and
a mechanical actuator for adjusting, in response to said alignment signal, a relative position of at least one component selected from the group consisting of the projector, the lens assembly, and said at least one mirror so that the test image is properly aligned on the display screen. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification