US5513026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a liquid crystal display with a spacer
Assignee: Ricoh Co Ltd
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Filing: 1995-02-15
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Granted: 1996-04-30
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Expires: 2015-02-15
Abstract
Abstract In a liquid crystal display device (LCD), a spacer is interposed between an upper and a lower substrate implemented by flexible films. Liquid crystals are confined in the gap between the two substrates. The spacer is scattered in the crystals at a density higher than 201/mm 2 and lower than 800/mm 2 . The device allows a minimum of bubbles to be produced in the crystals without resorting to gas barrier coatings or similar conventional implementation against bubbles. When the spacer is sprayed, it is uniformly distributed to set up a uniform cell gap. The device is, therefore, free from display speckles and other defects and inexpensive.
Inventors
- 👤 Takumi Suzuki
- 👤 Reiko Kameyama
- 👤 Sumio Kamoi
- 👤 Hisashi Kikuchi
- 👤 Satosi Komori
- 👤 Tomomi Suetake
- 👤 Yumi Matsuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:12
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/13392; G02F1/133305
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
138 words
A method of producing an LCD having at least a first polymer film substrate and a second polymer film substrate, comprising the steps of: forming transparent electrodes on each of respective facing surfaces of said first and second polymer film substrates, a first of the facing surfaces of said first polymer film substrate having a greater area occupied by the transparent electrodes than a second of the facing surfaces of the second polymer film substrate; covering said transparent electrodes with an alignment coating; spraying a spacer between said facing surfaces of said first and second polymer film substrates onto the first face of the first polymer film substrate; and filling a gap between said facing surfaces of said first and second polymer film substrates which is formed when said LCD has edges thereof adhered together with liquid crystals.
Claim 2
Independent Claim
138 words
A method of producing an LCD having at least a first polymer film substrate and a second polymer film substrate, comprising the steps of: forming transparent electrodes on each of respective facing surfaces of said first and second polymer film substrates, a first of the facing surfaces of said first polymer film substrate having a greater area occupied by the transparent electrodes than a second of the facing surfaces of the second polymer film substrate; covering said transparent electrodes with an alignment coating; spraying a spacer between said facing surfaces of said first and second polymer film substrates onto the first face of the first polymer film substrate; and filling a gap between said facing surfaces of said first and second polymer film substrates which is formed when said LCD has edges thereof adhered together with liquid crystals.
Claim 3
Dependent Claim
22 words
The method as claimed in claim 1, wherein said first polymer film substrate comprises a substrate on which common electrodes are formed.
Claim 4
Dependent Claim
30 words
The method as claimed in claim 1, further comprising a step of subjecting the first polymer film substrate to a water absorption treatment before the step of spraying said spacer.
Claim 5
Dependent Claim
41 words
The method as claimed in claim 1, further comprising steps of rinsing the first polymer film substrate by a water-based rinsing agent and then vapor cleansing the first polymer film substrate using organic solvent, before the step of spraying said spacer.
Claim 6
Dependent Claim
45 words
The method as claimed in claim 1, further comprising steps of dissipating a charge on the first polymer film substrate before spraying said spacer, and a static electricity of 0±100 V existing on said first polymer film substrate at a time of spraying said spacer.
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) | 1999-04-30 | 1999-10-30 | 2000-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-30 | 2003-10-30 | 2004-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-30 | 2007-10-30 | 2008-04-30 | $7700.00 | Window Closed / Lapsed |