Patent US5653522A successfully refreshed from Google Patents.
US5653522A
Expired / Lapsed
US
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Display panel mount for projection dislay system
Assignee: Kopin Corp
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Filing: 1994-08-04
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Granted: 1997-08-05
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Expires: 2014-08-04
Abstract
Abstract Liquid crystal display panels are mounted to a beam combining prism such that each display panel can flex in the place of the display panel as a result of thermal stresses. A three-point clip mount for each display panel is bonded between the prism and the display panels.
Inventors
- 👤 Bryan E. Loucks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:40
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/10; G02B27/14; G02B27/144; G02B27/1073; G02B27/145; G02B27/149; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133308; H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/3105; H04N9/3141; H04N9/317; G02F2201/00; G02F2201/46
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
92 words
A display system comprising: a plurality of N display panels for generating respective images; an N-to-1 beam combiner having a plurality of unitary reflective surfaces and an optical axis for optically combining the N generated images to form a synthesized image; and a plurality of three-point mounts, each display panel fixed in an image plane relative to the optical axis of the beam combiner by a respective three-point mount, each three-point mount arranged to permit movement of the respective display panel relative to the beam combiner during operation of the display system.
Claim 2
Dependent Claim
92 words
A display system comprising: a plurality of N display panels for generating respective images; an N-to-1 beam combiner having a plurality of unitary reflective surfaces and an optical axis for optically combining the N generated images to form a synthesized image; and a plurality of three-point mounts, each display panel fixed in an image plane relative to the optical axis of the beam combiner by a respective three-point mount, each three-point mount arranged to permit movement of the respective display panel relative to the beam combiner during operation of the display system.
Claim 3
Dependent Claim
35 words
The display system of claim 1 wherein N equals three, a first display panel generating a red-color image, a second display panel generating a green-color image, and a third display panel generating a blue-color image.
Claim 4
Dependent Claim
17 words
The display system of claim 1 wherein the display panels are active matrix liquid crystal display panels.
Claim 5
Dependent Claim
14 words
The display system of claim 1 wherein the beam combiner is a Philips-type prism.
Claim 6
Dependent Claim
22 words
The display system of claim 1 wherein the three-point mounts permit thermal expansion of the display panels in a respective image plane.
Claim 7
Dependent Claim
69 words
The display system of claim 5 wherein, for each display panel, a first mount point is rigid in three orthogonal directions relative to the image plane, a second mount point is flexible in a first direction along the respective image plane and rigid in all other directions, and a third mount point is flexible in a second direction along the respective image plane and rigid in all other directions.
Claim 8
Dependent Claim
22 words
The display system of claim 6 wherein the first mount point is adjacent to both the second and the third mount points.
Claim 9
Dependent Claim
16 words
The display system of claim 1 wherein the three-point mounts are fixed to the beam combiner.
Claim 10
Dependent Claim
20 words
The display system of claim 1 wherein the three-point mounts are fixed to a supporting frame of the display system.
Claim 11
Dependent Claim
30 words
The display system of claim 1 wherein the beam combiner comprises at least two optical elements, each optical element interacting with an adjacent optical element at a unitary reflective surface.
Claim 12
Dependent Claim
104 words
A liquid crystal projection display system comprising: a plurality of liquid crystal display panels for generating respective images; a light source to direct light through each display panel; a beam combiner having a plurality of unitary reflective surfaces and an optical axis for optically combining the generated images to form a synthesized image; a plurality of mounts, each display panel fixed in an image plane relative to the optical axis of the beam combiner by a respective mount that permits thermal expansion of the display panel in the respective image plane; and an optical system for projecting the synthesized image onto a display surface.
Claim 13
Dependent Claim
104 words
A liquid crystal projection display system comprising: a plurality of liquid crystal display panels for generating respective images; a light source to direct light through each display panel; a beam combiner having a plurality of unitary reflective surfaces and an optical axis for optically combining the generated images to form a synthesized image; a plurality of mounts, each display panel fixed in an image plane relative to the optical axis of the beam combiner by a respective mount that permits thermal expansion of the display panel in the respective image plane; and an optical system for projecting the synthesized image onto a display surface.
Claim 14
Dependent Claim
38 words
The projection display system of claim 11 wherein there are three display panels, a first display panel generating a red-color image, a second display panel generating a green-color image, and a third display panel generating a blue-color image.
Claim 15
Dependent Claim
18 words
The projection display system of claim 11 wherein the display panels are active matrix liquid crystal display panels.
Claim 16
Dependent Claim
15 words
The projection display system of claim 11 wherein the beam combiner is a Philips-type prism.
Claim 17
Dependent Claim
13 words
The projection display system of claim 11 wherein the mounts are three-point mounts.
Claim 18
Dependent Claim
70 words
The projection display system of claim 15 wherein, for each display panel, a first mount point is rigid in three orthogonal directions relative to the image plane, a second mount point is flexible in a first direction along the respective image plane and rigid in all other directions, and a third mount point is flexible in a second direction along the respective image plane and rigid in all other directions.
Claim 19
Dependent Claim
39 words
The projection display system of claim 11 wherein a cavity between each display panel and the beam combiner is selected such that the displacement between the display panel and a position at optimal focus is less than 0.5 mm.
Claim 20
Dependent Claim
17 words
The projection display system of claim 15 wherein the three-point mounts are fixed to the beam combiner.
Claim 21
Dependent Claim
22 words
The projection display system of claim 15 wherein the three-point mounts are fixed to a supporting frame of the projection display system.
Claim 22
Dependent Claim
30 words
The display system of claim 11 wherein the beam combiner comprises at least two optical elements, each optical element interacting with an adjacent optical element at a unitary reflective surface.
Claim 23
Dependent Claim
92 words
A display panel registration apparatus comprising: a plurality of display panels for generating respective images; an optical combiner having an optical axis for optically combining the generated image to form a synthesized image; and a plurality of flexible mounts, each mount fixing a respective display panel in an image plane relative to the optical axis of the optical combiner so the generated images are registered to form the synthesized image, each mount arranged to permit movement of the respective display panel relative to the optical combiner during operation of the display panels.
Claim 24
Dependent Claim
92 words
A display panel registration apparatus comprising: a plurality of display panels for generating respective images; an optical combiner having an optical axis for optically combining the generated image to form a synthesized image; and a plurality of flexible mounts, each mount fixing a respective display panel in an image plane relative to the optical axis of the optical combiner so the generated images are registered to form the synthesized image, each mount arranged to permit movement of the respective display panel relative to the optical combiner during operation of the display panels.
Claim 25
Independent Claim
107 words
A method of fixing a plurality of display panels which generate respective images relative to an optical combiner having an optical axis which forms a synthesized image from the generated images, comprising the steps of: providing a plurality of flexible mounts; aligning each display panel in a respective image plane relative to the optical axis of the optical combiner so the generated images are registered to form the synthesized image; and fixing the aligned display panels in the respective image planes using respective flexible mounts so that each mount permits movement of the respective display panel relative to the optical combiner during operation of the display panels.
Claim 26
Independent Claim
107 words
A method of fixing a plurality of display panels which generate respective images relative to an optical combiner having an optical axis which forms a synthesized image from the generated images, comprising the steps of: providing a plurality of flexible mounts; aligning each display panel in a respective image plane relative to the optical axis of the optical combiner so the generated images are registered to form the synthesized image; and fixing the aligned display panels in the respective image planes using respective flexible mounts so that each mount permits movement of the respective display panel relative to the optical combiner during operation of the display panels.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-08-04 | 2001-02-03 | 2001-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-04 | 2005-02-03 | 2005-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-04 | 2009-02-03 | 2009-08-05 | $7700.00 | Window Closed / Lapsed |