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US5548425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflective LCD having a resin-diffuser with dispersed metal oxide particles between a substrate and pixel electrodes or integral with the pixel electrodes
Assignee: Sharp Corp
•
Filing: 1994-07-20
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Granted: 1996-08-20
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Expires: 2014-07-20
Abstract
Abstract A reflective type display apparatus having a plurality of pixels includes: a first substrate; a second substrate provided in parallel to the first substrate, the second substrate being transparent to external light; a plurality of transparent pixel electrodes formed on the first substrate; a transparent counter electrode layer formed on the second substrate; a light modulating layer for modulating the external light in accordance with voltages between the plurality of transparent pixel electrodes and the transparent counter electrode, the light modulating layer being interposed between the plurality of transparent pixel electrodes and the transparent counter electrode; wherein a light scattering layer in which fine particles are dispersed in a matrix is interposed between the plurality of transparent pixel electrodes and the first substrate, the light scattering layer scatters the external light.
Inventors
- 👤 Masahiro Adachi
- 👤 Shinji Shimada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:40
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133553; G02F1/137; G02F1/13725; G02F2203/00; G02F2203/02
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
143 words
A reflective type display apparatus having a plurality of pixels, comprising: a first substrate; a second substrate provided in parallel to the first substrate, the second substrate being transparent to external light; a plurality of transparent pixel electrodes formed on the first substrate; a transparent counter electrode layer formed on the second substrate; a light modulating layer for modulating the external light in accordance with voltages between the plurality of transparent pixel electrodes and the transparent counter electrode, the light modulating layer being interposed between the plurality of transparent pixel electrodes and the transparent counter electrode; and a light scattering layer in which fine particles are dispersed in a matrix made of a resin, said light scattering layer being interposed between the plurality of transparent pixel electrodes and the first substrate, the light scattering layer diffusely scatters the external light, thereby reducing glare.
Claim 2
Dependent Claim
143 words
A reflective type display apparatus having a plurality of pixels, comprising: a first substrate; a second substrate provided in parallel to the first substrate, the second substrate being transparent to external light; a plurality of transparent pixel electrodes formed on the first substrate; a transparent counter electrode layer formed on the second substrate; a light modulating layer for modulating the external light in accordance with voltages between the plurality of transparent pixel electrodes and the transparent counter electrode, the light modulating layer being interposed between the plurality of transparent pixel electrodes and the transparent counter electrode; and a light scattering layer in which fine particles are dispersed in a matrix made of a resin, said light scattering layer being interposed between the plurality of transparent pixel electrodes and the first substrate, the light scattering layer diffusely scatters the external light, thereby reducing glare.
Claim 3
Dependent Claim
23 words
A reflective type display apparatus according to claim 1, wherein the light scattering layer is colored for each of the plurality of pixels.
Claim 4
Dependent Claim
41 words
A reflective type display apparatus according to claim 2, wherein each of colored regions of the light scattering layer includes red regions, green regions or blue regions, and the red regions, the green regions and the blue regions are arranged regularly.
Claim 5
Dependent Claim
40 words
A reflective type display apparatus according to claim 1, wherein each of the fine particles is made of material selected from a group of aluminum oxide, silicon oxide, titanium oxide, manganese oxide, zirconium oxide, zinc oxide, magnesium fluoride and fluorite.
Claim 6
Dependent Claim
34 words
A reflective type display apparatus according to claim 1, wherein the matrix of the light scattering layer includes a polymer selected from a group of polyamide, polyimide, polyester, acrylic resin, epoxy resin, and polyvinylalcohol.
Claim 7
Dependent Claim
27 words
A reflective type display apparatus according to claim 1, wherein the thickness of the light scattering layer is in a range from 1000 angstroms to 10 μm.
Claim 8
Dependent Claim
24 words
A reflective type display apparatus according to claim 1, further comprising a metal reflector layer between the light scattering layer and the first substrate.
Claim 9
Dependent Claim
33 words
A reflective type display apparatus according to claim 1, wherein the light scattering layer includes at least one of dyed fine particles as the fine particles and a dyed matrix as the matrix.
Claim 10
Dependent Claim
21 words
A reflective type display apparatus according to claim 1, wherein the light modulating layer includes a liquid crystal containing dichroic pigments.
Claim 11
Dependent Claim
141 words
A reflective type display apparatus having a plurality of pixels, comprising: a first substrate; a second substrate provided in parallel to the first substrate, the second substrate being transparent to external light; a plurality of pixel electrodes formed on the first substrate; a transparent counter electrode layer formed on the second substrate; and a light modulating layer for modulating the external light in accordance with voltages between the plurality of pixel electrodes and the transparent counter electrode, the light modulating layer being interposed between the plurality of pixel electrodes and the transparent counter electrode; wherein each of the plurality of pixel electrodes includes a light scattering layer in which fine particles are dispersed in a matrix made of a resin, the light scattering layer diffusely scatters the external light, thereby reducing glare, and wherein the fine particles include electrical conductive particles.
Claim 12
Dependent Claim
141 words
A reflective type display apparatus having a plurality of pixels, comprising: a first substrate; a second substrate provided in parallel to the first substrate, the second substrate being transparent to external light; a plurality of pixel electrodes formed on the first substrate; a transparent counter electrode layer formed on the second substrate; and a light modulating layer for modulating the external light in accordance with voltages between the plurality of pixel electrodes and the transparent counter electrode, the light modulating layer being interposed between the plurality of pixel electrodes and the transparent counter electrode; wherein each of the plurality of pixel electrodes includes a light scattering layer in which fine particles are dispersed in a matrix made of a resin, the light scattering layer diffusely scatters the external light, thereby reducing glare, and wherein the fine particles include electrical conductive particles.
Claim 13
Dependent Claim
23 words
A reflective type display apparatus according to claim 10, wherein the light scattering layer is colored for each of the plurality of pixels.
Claim 14
Dependent Claim
42 words
A reflective type display apparatus according to claim 11, wherein each of the colored regions of the light scattering layer includes red regions, green regions or blue regions, and the red regions, the green regions and the blue regions are arranged regularly.
Claim 15
Dependent Claim
40 words
A reflective type display apparatus according to claim 10, wherein each of the fine particles is made of material selected from a group of aluminum oxide, silicon oxide, titanium oxide, manganese oxide, zirconium oxide, zinc oxide, magnesium fluoride and fluorite.
Claim 16
Dependent Claim
34 words
A reflective type display apparatus according to claim 10, wherein the matrix of the light scattering layer includes a polymer selected from a group of polyamide, polyimide, polyester, acrylic resin, epoxy resin, and polyvinylalcohol.
Claim 17
Dependent Claim
27 words
A reflective type display apparatus according to claim 10, wherein the thickness of the light scattering layer is in a range from 1000 angstroms to 10 μm.
Claim 18
Dependent Claim
24 words
A reflective type display apparatus according to claim 10, further comprising a metal reflector layer between the light scattering layer and the first substrate.
Claim 19
Dependent Claim
33 words
A reflective type display apparatus according to claim 10, wherein the light scattering layer is dyed by dyeing at least one of the fine particles and the matrix of the light scattering layer.
Claim 20
Dependent Claim
21 words
A reflective type display apparatus according to claim 10, wherein the light modulating layer includes a liquid crystal containing dicroic pigments.
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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) | 1999-08-20 | 2000-02-19 | 2000-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-20 | 2004-02-19 | 2004-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-20 | 2008-02-19 | 2008-08-20 | $7700.00 | Window Closed / Lapsed |