US4753516A
Expired / Lapsed
US
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Anti-reflection plate for display device
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1987-05-28
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Granted: 1988-06-28
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Expires: 2007-05-28
Abstract
Abstract An anti-reflection plate for a display device, including a transparent substrate wherein, on one or both surfaces of the substrate, a flat first layer consisting of a transparent hardening agent containing a silicon-containing organic compound has been applied and dried and, on the first layer, a second layer consisting of a transparent hardening agent containing a silicon-containing compound has been spray coated and hardened to form an uneven surface having projections each having a height of 0.1 to 2.0 μm in height, a diameter of 10 to 100 μm and a height/diameter ratio of 1/30 to 1/500 can effectively prevent reflection of external light on a screen of a display device without deteriorating the resolution of an image on the screen.
Inventors
- 👤 Toshiki Doi
- 👤 Takanori Fujita
- 👤 Yukio Yasunori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:12
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/111
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
97 words
An anti-reflection plate for a display device, which plate comprises a transparent substrate wherein, on one or both surfaces of the substrate, a flat first layer consisting of a transparent hardening agent containing a silicon-containing organic compound has been applied and dried and, on the first layer, a second layer consisting of a transparent hardening agent containing a silicon-containing compound has been spray coated and hardened to form an uneven surface having projections each having a height of 0.1 to 2.0 μm, a diameter of 10 to 100 μm and a height/diameter ratio of 1/30 to 1/500.
Claim 2
Dependent Claim
97 words
An anti-reflection plate for a display device, which plate comprises a transparent substrate wherein, on one or both surfaces of the substrate, a flat first layer consisting of a transparent hardening agent containing a silicon-containing organic compound has been applied and dried and, on the first layer, a second layer consisting of a transparent hardening agent containing a silicon-containing compound has been spray coated and hardened to form an uneven surface having projections each having a height of 0.1 to 2.0 μm, a diameter of 10 to 100 μm and a height/diameter ratio of 1/30 to 1/500.
Claim 3
Dependent Claim
39 words
The anti-reflection plate according to claim 1, wherein the transparent hardening agent for forming the second layer contains 70 to 90% by weight of a diluent having a boiling point of 110° C. to 200° C. under atmospheric pressure.
Claim 4
Dependent Claim
35 words
The anti-reflection plate according to claim 2, wherein the diluent is one selected from a group consisting of toluene, xylene, methyl isobutyl ketone, cellosolve, methylcellosolve, butylcellosolve, cellosolve acetate, cyclohexanone, amyl alcohol, n-butanol and mixtures thereof.
Claim 5
Dependent Claim
22 words
The anti-reflection plate according to claim 1, wherein the transparent hardening agent in at least one of said layers contains colloidal silica.
Claim 6
Dependent Claim
42 words
The anti-reflection plate according to claim 1, wherein the transparent hardening agent in at least one of said layers contains at least one silane compound selected from the group consisting of an alkoxysilane, a partially hydrolized alkoxysilane and a partially condensated alkoxysilane.
Claim 7
Dependent Claim
109 words
The anti-reflection plate according to claim 5, wherein the alkoxysilane is one selected from the group consisting of a tetraalkoxysilane of the formula: Si--(OR.sub.1).sub.4 an alkyltrialkoxysilane of the formula: R.sub.2 --Si--(OR.sub.1).sub.3 and a dialkyldialkoxysilane of the formula: ##STR2## wherein R 1 , R 2 and R 3 are the same or different and are each an alkyl group having 1 to 5 carbon atoms, an acetoxy group, a vinyl group, a (meth)acryloxy group, an allyl group, a phenyl group, a glycidyl group, an alkylthiol group having 1 to 5 carbon atoms in the alkyl group or an alkylamino group having 1 to 5 carbon atoms in the alkyl group.
Claim 8
Dependent Claim
18 words
The anti-reflection plate according to claim 1 wherein said projections have a height of 0.1 to 1.2 μm.
References Cited (Backward Citations)
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Cited
US4013465A
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US4114983A
Cited
US4294950A
Cited
US4374158A
Cited
US4434191A
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US4599272A
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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) | 1991-06-28 | 1991-12-28 | 1992-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-28 | 1995-12-28 | 1996-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-28 | 1999-12-28 | 2000-06-28 | $7700.00 | Window Closed / Lapsed |