US5281893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device with an anti-reflection film on the display plane
Assignee: Toshiba Corp
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Filing: 1991-07-22
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Granted: 1994-01-25
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Expires: 2011-07-22
Abstract
Abstract A display device including a display screen having an optical film provided thereon. The optical film is a porous thin film made of fine magnesium fluoride particles and a binder containing a condensate of a silane compound having a fluoroalkyl group, a co-condensate of the silane compound and silicon, or a co-condensate of the silane compound and a metal oxide compound. The combination of the specific binder and fine magnesium fluoride particles permits forming a porous optical film having a surprisingly high mechanical strength, excellent resistance to humidity and reduced external light reflection from the display plane.
Inventors
- 👤 Hidemi Matsuda
- 👤 Takeo Itou
- 👤 Kazuhiko Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:21
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H01J29/896; H01J29/88; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133502
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
110 words
A display device comprising: a display screen; and an optical film formed on said display screen to prevent an external light reflection, said optical film being a porous thin film comprising fine magnesium fluoride particles and a binder containing as a main component at least one material selected from the group consisting of: a condensate of a silane compound having a fluoroalkyl group; a co-condensate of said silane compound and silicon; and a co-condensate of said silane compound and a metal oxide series compound, said binder being added in an amount of 0.25 to 11 parts by weight relative to 1 part by weight of said fine magnesium fluoride particles.
Claim 2
Dependent Claim
110 words
A display device comprising: a display screen; and an optical film formed on said display screen to prevent an external light reflection, said optical film being a porous thin film comprising fine magnesium fluoride particles and a binder containing as a main component at least one material selected from the group consisting of: a condensate of a silane compound having a fluoroalkyl group; a co-condensate of said silane compound and silicon; and a co-condensate of said silane compound and a metal oxide series compound, said binder being added in an amount of 0.25 to 11 parts by weight relative to 1 part by weight of said fine magnesium fluoride particles.
Claim 3
Dependent Claim
16 words
The display device according to claim 1, wherein said display device is a cathode ray tube.
Claim 4
Dependent Claim
17 words
The display device according to claim 1, wherein said display device is a liquid crystal display device.
Claim 5
Dependent Claim
19 words
The display device according to claim 1, wherein said porous thin film has a porosity of 4.5 to 36%.
Claim 6
Dependent Claim
21 words
The display device according to claim 1, wherein said fine magnesium fluoride particles have a particle diameter of 10A to 1000A.
Claim 7
Dependent Claim
23 words
The display device according to claim 1, wherein said metal oxide is selected from the group consisting of titanium alkoxide and zirconium alkoxide.
Claim 8
Dependent Claim
35 words
The display device according to claim 1, wherein said porous thin film further contains at least one kind of an electrically conductive fine particles selected from the group consisting of indium oxide and tin oxide.
Claim 9
Dependent Claim
27 words
The display device according to claim 1, wherein said silane compound having a fluoroalkyl group is at least one compound selected from the group consisting of: ##STR3##
Claim 10
Dependent Claim
99 words
A display device comprising: a display screen; and an optical film formed on said display screen to prevent an external light reflection, said optical film being a porous thin film comprising fine magnesium fluoride particles and a binder containing as a main component at least one material selected from the group consisting of: a condensate of a silane compound having a fluoroalkyl group; and a co-condensate of said silane compound and silicon oxide, said binder being added in an amount of 0.25 to 11 parts by weight relative to 1 part by weight of said fine magnesium fluoride particles.
Claim 11
Dependent Claim
99 words
A display device comprising: a display screen; and an optical film formed on said display screen to prevent an external light reflection, said optical film being a porous thin film comprising fine magnesium fluoride particles and a binder containing as a main component at least one material selected from the group consisting of: a condensate of a silane compound having a fluoroalkyl group; and a co-condensate of said silane compound and silicon oxide, said binder being added in an amount of 0.25 to 11 parts by weight relative to 1 part by weight of said fine magnesium fluoride particles.
Claim 12
Dependent Claim
16 words
The display device according to claim 9, wherein said display device is a cathode ray tube.
Claim 13
Dependent Claim
17 words
The display device according to claim 9, wherein said display device is a liquid crystal display device.
Claim 14
Dependent Claim
19 words
The display device according to claim 9, wherein said porous thin film has a porosity of 4.5 to 36%.
Claim 15
Dependent Claim
21 words
The display device according to claim 9, wherein said fine magnesium fluoride particles have a particular diameter of 10A to 1000A.
Claim 16
Dependent Claim
27 words
The display device according to claim 9, wherein said silane compound having a fluoroalkyl group is at least one compound selected from the group consisting of: ##STR4##
References Cited (Backward Citations)
JPS58172243A
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JPS58211701A
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JPS5929051A
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US4723091A
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JPS6110043A
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JPS6441149A
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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) | 1997-01-24 | 1997-07-26 | 1998-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-24 | 2001-07-26 | 2002-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-24 | 2005-07-26 | 2006-01-25 | $7700.00 | Window Closed / Lapsed |