US5493430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color, reflective liquid crystal displays
Assignee: Kent Displays Inc
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Filing: 1994-08-03
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Granted: 1996-02-20
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Expires: 2014-08-03
Abstract
Abstract A display device (10) having first and second substrates (12) and (30) and a layer of a liquid crystal material having a periodic modulated structure, such as a PSCT or PFCT liquid crystal material disposed therebetween. A layer of a color imparting material (18) is disposed atop one surface of one substrate. The liquid crystal material is tailored or tuned to complementarily provide color to said display in connection with said layer of color imparting material.
Inventors
- 👤 Minhua Lu
- 👤 Haiji Yuan
- 👤 Zvi Yaniv
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:29
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/137; G02F1/13718; G02F2203/00; G02F2203/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
122 words
A full color liquid crystal display having a viewer proximal and a viewer distal side, said display comprising: a first substrate having a first and second major surface, and having a color imparting layer disposed on one major surface thereof, and said second major surface defining said viewer distal side of said display; a second substrate disposed opposite said first substrate; and a layer of a liquid crystal material having periodic modulated optical structure that reflects light, disposed between said first and second substrates, said material having a first state in which said material is substantially transparent, and a second state which reflects light of a preselected wavelength, said preselected wavelength selected to complement the color imparted by said color imparting layer.
Claim 2
Dependent Claim
122 words
A full color liquid crystal display having a viewer proximal and a viewer distal side, said display comprising: a first substrate having a first and second major surface, and having a color imparting layer disposed on one major surface thereof, and said second major surface defining said viewer distal side of said display; a second substrate disposed opposite said first substrate; and a layer of a liquid crystal material having periodic modulated optical structure that reflects light, disposed between said first and second substrates, said material having a first state in which said material is substantially transparent, and a second state which reflects light of a preselected wavelength, said preselected wavelength selected to complement the color imparted by said color imparting layer.
Claim 3
Dependent Claim
18 words
A display as in claim 1, wherein said liquid crystal material is a cholesteric texture liquid crystal material.
Claim 4
Dependent Claim
19 words
A display as in claim 2, wherein said liquid crystal material is polymer stabilized cholesteric texture liquid crystal material.
Claim 5
Dependent Claim
19 words
A display as in claim 2, wherein said liquid crystal material is polymer free cholesteric texture liquid crystal material.
Claim 6
Dependent Claim
22 words
A display as in claim 1, wherein said first and second substrates further include a layer of a transparent electrically conductive material.
Claim 7
Dependent Claim
16 words
A display as in claim 1, wherein said color imparting layer provides a plurality of colors.
Claim 8
Dependent Claim
18 words
A display as in claim 6, wherein said plurality of colors are arranged in a plurality of patterns.
Claim 9
Dependent Claim
18 words
A display as in claim 6, wherein said plurality of colors are arranged in a plurality of rows.
Claim 10
Dependent Claim
20 words
A display as in claim 6, wherein said plurality of colors are arranged in a plurality of rows and columns.
Claim 11
Dependent Claim
15 words
A display as in claim 1 wherein said color imparting layer is a colored paint.
Claim 12
Dependent Claim
15 words
A display as in claim 1 wherein said color imparting layer is a color reflector.
Claim 13
Dependent Claim
14 words
A display as in claim 1 wherein said color imparting layer is color dye.
Claim 14
Dependent Claim
17 words
A display as in claim 1 wherein said color imparting layer is an intrinsic color dielectric substrate.
Claim 15
Dependent Claim
17 words
A display as in claim 1 wherein said color imparting layer is a dynamic color imparting layer.
Claim 16
Dependent Claim
17 words
A display as in claim 1 wherein said color imparting layer is a dynamic color imparting layer.
Claim 17
Dependent Claim
34 words
A display as in claim 15, wherein said dynamic color imparting layer may be fabricated from an electrochromic device, an electrophoretic device, a photochromic device, a piezochromic device, a thermochromic device, and combinations thereof.
Claim 18
Dependent Claim
16 words
A display as in claim 1 wherein said color imparting layer is a light emitting material.
Claim 19
Dependent Claim
15 words
A display as in claim 1, further including a retroreflector disposed adjacent said first substrate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-02-19 | 1999-08-21 | 2000-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-19 | 2003-08-21 | 2004-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-19 | 2007-08-21 | 2008-02-20 | $7700.00 | Window Closed / Lapsed |