US6449023B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Active matrix liquid crystal display device
Assignee: Kopin Corp
•
Filing: 2001-04-09
•
Granted: 2002-09-10
•
Expires: 2021-04-09
Abstract
Abstract A transmissive active matrix liquid crystal display device has a multievel optical phase element that sepaeates each color component of light into a plurality of diffraction orders. The multilevel optical phase element is aligned with a an active matrix array and directs light of different colors through different pixels of a liquid crystal material. The transmission of light through the liquid crystal material is controlled by an array of transistor circuits that actuate pixel electrodes.
Inventors
- 👤 Gary J. Swanson
- 👤 Ronald P. Gale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:37
CPC Classifications
H; H10; H10D; H10D1/00; H10D1/60; H10D1/68; H10D1/692; G; G02; G02B; G02B27/00; G02B27/09; G02B27/0938; G02B27/0994; G02B5/00; G02B5/02; G02B5/18; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133504; G02F1/1336; G02F1/133621; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/3105; H04N9/3108; H04N9/3141; H04N9/315; H10D1/696; H04N5/00; H04N5/74; H04N5/7416; H04N5/7441; H10D1/682; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
142 words
A transmissive active matrix liquid crystal display device comprising: an active matrix array of transistor circuits and pixel electrodes, each pixel electrode being electrically connected to a transistor circuit that actuates the pixel electrode; an optically transmissive substrate attached to the active matrix array; a layer of liquid crystal material positioned the substrate and a counter electrode to form a transmissive display structure such that actuation of the pixel electrodes controls transmission of light through a volume of the liquid crystal material; a multilevel optical phase element that separates each color component of light into a plurality of diffraction orders, wherein said multilevel optical phase element is aligned with the active matrix array and directs light of different colors through different volumes of the liquid crystal material; and a housing that contains the transmissive display structure and the multilevel optical phase element.
Claim 2
Dependent Claim
142 words
A transmissive active matrix liquid crystal display device comprising: an active matrix array of transistor circuits and pixel electrodes, each pixel electrode being electrically connected to a transistor circuit that actuates the pixel electrode; an optically transmissive substrate attached to the active matrix array; a layer of liquid crystal material positioned the substrate and a counter electrode to form a transmissive display structure such that actuation of the pixel electrodes controls transmission of light through a volume of the liquid crystal material; a multilevel optical phase element that separates each color component of light into a plurality of diffraction orders, wherein said multilevel optical phase element is aligned with the active matrix array and directs light of different colors through different volumes of the liquid crystal material; and a housing that contains the transmissive display structure and the multilevel optical phase element.
Claim 3
Dependent Claim
30 words
The display device of claim 1 wherein the diffractive optical phase element is bonded to a transfer substrate, and wherein the transfer substrate is bonded to the active matrix array.
Claim 4
Dependent Claim
25 words
The display device of claim 1 further comprising a light polarizer that polarizes light before the light is incident upon the multilevel optical phase element.
Claim 5
Dependent Claim
19 words
The display device of claim 1 wherein the housing forms a direct-view display device aligned with the transmissive display.
Claim 6
Dependent Claim
26 words
The display device of claim 1 further comprising one or more projection lenses aligned with the transmissive display or a mirror reflection of the transmissive display.
Claim 7
Dependent Claim
19 words
The display device of claim 1 further comprising an illumination system in alignment with the multilevel optical phase element.
Claim 8
Dependent Claim
14 words
The display device of claim 6 wherein the illumination system includes a light pipe.
Claim 9
Dependent Claim
15 words
The display device of claim 7 wherein the light pipe is a folded light pipe.
Claim 10
Dependent Claim
16 words
The display device of claim 6 wherein the illumination system includes a reflective box light source.
Claim 11
Dependent Claim
26 words
The display device of claim 6 wherein the illumination system includes a lenslet array, the lenslet array being optically aligned with the multilevel optical phase element.
Claim 12
Dependent Claim
11 words
The display device of claim 1 further comprising a viewing optic.
Claim 13
Dependent Claim
17 words
The display device of claim 11 wherein the viewing optic includes a cholesteric liquid crystal (CLC) element.
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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) | 2005-09-09 | 2006-03-11 | 2006-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-09-09 | 2010-03-11 | 2010-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-09-09 | 2014-03-11 | 2014-09-10 | $7700.00 | Window Closed / Lapsed |