Patent US5114748A successfully refreshed from Google Patents.
US5114748A
Expired / Lapsed
US
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Method of preparing or rubbing a substrate to be used in a lcd device by spraying it with uniformly sized droplets or frozen water
Assignee: Taiyo Sanso Co Ltd
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Filing: 1990-11-29
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Granted: 1992-05-19
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Expires: 2010-11-29
Abstract
Abstract A method in which a liquid is sprayed through a nozzle to form minute droplets of substantially uniform size. These uniform droplets are sprayed into and frozen by a refrigeration medium, such as liquid nitrogen, to form uniform diameter frozen particles. The frozen particles are ejected onto the surface of a substrate used in a liquid crystal display device to orient the liquid crystal material applied to the surface.
Inventors
- 👤 Masuo Tada
- 👤 Hiroi Takahiko
- 👤 Takaaki Fukumoto
- 👤 Toshiaki Ohmori
- 👤 Itaru Kanno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:44
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/13378; C; C09; C09K; C09K2323/00; C09K2323/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
A method of treating a surface of substrate for a liquid crystal display device for orienting a liquid crystal material applied to the surface comprising: spraying a liquid to form droplets having a substantially uniform size; freezing the droplets to form frozen particles, each particle having substantially the same diameter, by heat exchange between the droplets and a refrigeration medium; and ejecting, at a desired angle, the frozen particles onto the surface of a substrate for a liquid crystal display device to orient a liquid crystal material applied to the surface.
Claim 2
Independent Claim
91 words
A method of treating a surface of substrate for a liquid crystal display device for orienting a liquid crystal material applied to the surface comprising: spraying a liquid to form droplets having a substantially uniform size; freezing the droplets to form frozen particles, each particle having substantially the same diameter, by heat exchange between the droplets and a refrigeration medium; and ejecting, at a desired angle, the frozen particles onto the surface of a substrate for a liquid crystal display device to orient a liquid crystal material applied to the surface.
Claim 3
Dependent Claim
13 words
The method according to claim 1 including spraying the liquid through a nozzle.
Claim 4
Dependent Claim
45 words
The method according to claim 2 including forming frozen particles having a substantially uniform diameter within the range 5 mm -20 μm, including determining the diameter of the particles by altering the ratio of the liquid to the high-pressure gas supplied to said spray nozzle.
Claim 5
Dependent Claim
12 words
The method according to claim 3 wherein said liquid is ultrapure water.
Claim 6
Dependent Claim
13 words
The method according to claim 4 wherein said refrigeration medium is liquid nitrogen.
Claim 7
Dependent Claim
13 words
The method according to claim 5 wherein the high-pressure gas is nitrogen gas.
Claim 8
Dependent Claim
13 words
The method according to claim 5 wherein the high-pressure gas is compressed air.
Claim 9
Independent Claim
93 words
A method of treating a surface of a substrate for a liquid crystal display device for orienting a liquid crystal material applied to the surface comprising: heating a liquid stored in a pressure tank to form a vapor; freezing the vapor to form frozen particles, each particle having substantially the same diameter, by heat exchange between the vapor and a refrigeration medium; and ejecting, at a desired angle, the frozen particles onto the surface of a substrate for a liquid crystal display device to orient a liquid crystal material applied to the surface.
Claim 10
Independent Claim
93 words
A method of treating a surface of a substrate for a liquid crystal display device for orienting a liquid crystal material applied to the surface comprising: heating a liquid stored in a pressure tank to form a vapor; freezing the vapor to form frozen particles, each particle having substantially the same diameter, by heat exchange between the vapor and a refrigeration medium; and ejecting, at a desired angle, the frozen particles onto the surface of a substrate for a liquid crystal display device to orient a liquid crystal material applied to the surface.
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) | 1995-05-19 | 1995-11-18 | 1996-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-19 | 1999-11-18 | 2000-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-19 | 2003-11-18 | 2004-05-19 | $7700.00 | Window Closed / Lapsed |