Slim optical projection system and image display apparatus employing the same
First Claim
Patent Images
1. An optical projection system, comprising:
- a relay lens group to produce an intermediate image from an image created by a display and to generate a first spool distortion in the intermediate image;
a projection lens group to enlarge and project the intermediate image that passes through the relay lens group and to generate a second spool distortion in the projected image, the second spool distortion being different from the first spool distortion; and
a reflector to reflect the image enlarged by the projection lens group onto a screen at a wide viewing angle,wherein the first and second spool distortions compensate for a third distortion caused by the reflector.
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Abstract
A slim optical projection system and an image display apparatus employing the same. The optical projection system includes: a relay lens group to produce an intermediate image from an image created by a display and to generate a first distortion in the intermediate image, a projection lens group to enlarge and project the intermediate image that passes through the relay lens group and to generate a second distortion in the projected image, and a reflector to reflect the image enlarged by the projection lens group to a screen at a wide viewing angle. The first and second distortions are used to compensate for a third distortion caused by the reflector.
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Citations
51 Claims
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1. An optical projection system, comprising:
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a relay lens group to produce an intermediate image from an image created by a display and to generate a first spool distortion in the intermediate image; a projection lens group to enlarge and project the intermediate image that passes through the relay lens group and to generate a second spool distortion in the projected image, the second spool distortion being different from the first spool distortion; and a reflector to reflect the image enlarged by the projection lens group onto a screen at a wide viewing angle, wherein the first and second spool distortions compensate for a third distortion caused by the reflector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An optical projection system usable with an image display apparatus, comprising:
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a preliminary distortion unit to receive an image created by an image creation unit and to induce a preliminary spool distortion in the received image; and an image enlarging unit to receive the preliminary distorted image, to enlarge the received image while inducing a spool distortion in the received image, and to project the enlarged image onto a screen, the spool distortion being different from the preliminary spool distortion, wherein the preliminary spool distortion compensates for the spool distortion induced by the image enlarging unit, and wherein the image enlarging unit compensates for a subsequent distortion. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. An optical projection system, comprising:
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a refractive optical system to enlarge and transmit an image produced by a display; a reflective optical system to reflect the image transmitted by the refractive optical system at a wide viewing angle; and a relay lens group disposed between the display and the reflective optical system to preliminarily induce a first spool distortion to compensate for a third distortion caused by the reflective optical system, wherein the refractive optical system preliminarily induces a second spool distortion that is used in combination with the first spool distortion to compensate for the third distortion caused by the reflective optical system, the second spool distortion being different from the first spool distortion. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. An image display apparatus including a display to receive a beam emitted by a light source and to produce an image by processing the received beam according to an input image signal and an optical projection system to enlarge and project the produced image onto a screen, and the optical projection system comprises:
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a relay lens group to produce an intermediate image from the image created by the display and to generate a first spool distortion in the intermediate image; a projection lens group to enlarge and project the intermediate image that passes through the relay lens group and to generate a second spool distortion in the projected image, the second spool distortion being different from the first spool distortion; and a reflector to reflect the image enlarged by the projection lens group onto the screen at a wide viewing angle, wherein the first and second spool distortions are used to compensate for a third distortion caused by the reflector. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. An image display apparatus including a display to receive a beam emitted by a light source and to produce an image by processing the received beam according to an input image signal and an optical projection system to enlarge and project the produced image onto a screen, and the optical projection system comprises:
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a refractive optical system to enlarge and transmit the image produced by the display; a reflective optical system to reflect the image transmitted by the refractive optical system at a wide viewing angle; and a relay lens group disposed between the display and the reflective optical system to preliminarily induce a first spool distortion to compensate for a third distortion caused by the reflective optical system, wherein the refractive optical system preliminarily induces a second spool distortion that is used in combination with the first spool distortion to compensate for the third distortion caused by the reflective optical system, the second spool distortion being different from the first spool distortion. - View Dependent Claims (39, 40, 41, 42)
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43. An image display apparatus to display an image on a screen, comprising:
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an image creation unit to create an image; and an optical projection system, comprising; a preliminary distortion unit to receive the image created by an image creation unit and to induce a preliminary spool distortion in the received image; and an image enlarging unit to receive the preliminary spool distorted image, to enlarge the received image while inducing a spool distortion in the received image, and to project the enlarged image onto a screen, the spool distortion being different from the preliminary spool distortion, wherein the preliminary spool distortion compensates for the spool distortion induced by the image enlarging unit, and wherein the image enlarging unit compensates for a subsequent distortion.
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44. An optical projection system, comprising:
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a display to generate an image; a first lens group to generate a first intermediate image having a first spool distortion from the image; a second lens group to generate a second intermediate image having a second spool distortion from the first intermediate image, the second spool distortion being different from the first spool distortion; a reflector to introduce a third distortion into the second intermediate image to compensate for the first and second spool distortions, and to generate a third intermediate image; and a screen to display the third intermediate image without the first and second spool distortions. - View Dependent Claims (45, 46, 47)
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48. An image display apparatus, comprising:
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a screen disposed at a front side of the image display apparatus; an imager creator disposed under the screen at the front side of the image display apparatus to create an image having a plurality of light beams and to transmit the plurality of light beams in a rear direction; a refractive optical system to receive the plurality of light beams from the image creator and to relay the plurality of light beams along the rear direction while enlarging an angle along which the plurality of light beams propagates and while introducing a predetermined spool distortion in the image; and a reflective optical system disposed at a rear side of the image display apparatus to receive the plurality of light beams from the refractive optical system and to reflect the plurality of light beams onto the screen while enlarging the image and introducing another spool distortion in the image, the another spool distortion being different from the predetermined spool distortion, wherein the predetermined spool distortion and the another spool distortion cancel out each other.
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49. A method of forming an image in an optical projection system, the method comprising:
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receiving an image created by an image creation unit; relaying and enlarging the received image to a reflector while creating a spool predistortion in the received image and providing the predistorted image to a reflector; and reflecting and enlarging the predistorted image toward a screen while introducing a spool distortion that is compensated for by the predistortion, the spool distortion being different from the spool predistortion. - View Dependent Claims (50, 51)
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Specification