US5313322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing liquid crystal display device including degassing substrates before forming electrode, sealing, or injecting liquid crystal
Assignee: Sharp Corp
•
Filing: 1992-10-28
•
Granted: 1994-05-17
•
Expires: 2012-10-28
Abstract
Abstract A method of producing a liquid crystal display device comprising the steps of opposing two substrates, which are composed of a transparent electrode formed on a plastic substrate, with a specified space therebetween, sealing the circumferential ends of the substrates with a sealant so as to form a sealed space, and injecting a liquid crystal to the sealed space, wherein a degassing treatment is conducted by heating each of the substrates or the sealed substrates in a vacuum atmosphere to release gas adsorbed on the surface of the substrates prior to the step of forming the transparent electrode, the sealing step or the injection step of the liquid crystal.
Inventors
- 👤 Hiroshi Takanashi
- 👤 Shunsei Fukuchi
- 👤 Kenji Misono
- 👤 Makoto Iwamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:08
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1341
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
100 words
A method of producing a liquid crystal display device comprising the steps of opposing two substrates, which are composed of a transparent electrode formed on a plastic substrate, with a specified space therebetween, sealing the circumferential ends of the substrates with a sealant so as to form a sealed space, and injecting a liquid crystal to the sealed space, wherein a degassing treatment is conducted by heating each of the plastic substrates in a vacuum atmosphere to release gas adsorbed on the surface of the plastic substrate prior to either the step of forming the electrodes or the sealing step.
Claim 2
Independent Claim
100 words
A method of producing a liquid crystal display device comprising the steps of opposing two substrates, which are composed of a transparent electrode formed on a plastic substrate, with a specified space therebetween, sealing the circumferential ends of the substrates with a sealant so as to form a sealed space, and injecting a liquid crystal to the sealed space, wherein a degassing treatment is conducted by heating each of the plastic substrates in a vacuum atmosphere to release gas adsorbed on the surface of the plastic substrate prior to either the step of forming the electrodes or the sealing step.
Claim 3
Dependent Claim
70 words
A method of producing a liquid crystal display device according to claim 1, wherein the degassing treatment is conducted just before the step of forming the transparent electrode and the substrate is heated during the degassing treatment to a temperature which does not deform a material of the substrate and which is substantially higher than a temperature at which the substrate is heated in the formation of the transparent electrode.
Claim 4
Dependent Claim
52 words
A method of producing a liquid crystal display device according to claim 2, wherein the temperature at which the substrate is heated during the degassing treatment is 130° to 140° C. and the temperature at which the substrate is heated in the formation of the transparent electrode is 100° to 120° C.
Claim 5
Dependent Claim
49 words
A method of producing a liquid crystal display device according to claim 1, wherein the degassing treatment is conducted just before the sealing step by heating the substrate to a temperature which does not deform the material of the substrate and which can remove moisture in a vacuum atmosphere.
Claim 6
Dependent Claim
31 words
A method of producing a liquid crystal display device according to claim 4, wherein the degassing treatment is conducted by heating the substrate to 110° C. and then reducing the pressure.
Claim 7
Dependent Claim
31 words
A method of producing a liquid crystal display device according to claim 1, wherein a vacuum atmosphere in the degassing treatment is prepared just before the formation of the transparent electrodes.
Claim 8
Independent Claim
97 words
A method of producing a liquid crystal display device comprising the steps of opposing two substrates, which are composed of a transparent electrode formed on a plastic substrate, with a specified space therebetween, sealing the circumferential ends of the substrates with a sealant so as to form a sealed space, and injecting a liquid crystal to the sealed space, wherein a degassing treatment is conducted by heating the liquid crystal display device before the injection of the liquid crystal in a vacuum atmosphere so as to release gas adsorbed on the surfaces of the substrates and sealant.
Claim 9
Independent Claim
97 words
A method of producing a liquid crystal display device comprising the steps of opposing two substrates, which are composed of a transparent electrode formed on a plastic substrate, with a specified space therebetween, sealing the circumferential ends of the substrates with a sealant so as to form a sealed space, and injecting a liquid crystal to the sealed space, wherein a degassing treatment is conducted by heating the liquid crystal display device before the injection of the liquid crystal in a vacuum atmosphere so as to release gas adsorbed on the surfaces of the substrates and sealant.
Claim 10
Dependent Claim
38 words
A method of producing a liquid crystal display device according to claim 7, wherein a jig for holding the sealed substrates from the outside is used to prevent the deformation of the sealed substrates in the degassing treatment.
References Cited (Backward Citations)
JPS57139720A
Cited
US4699471A
Cited
US5020883A
Cited
JPS62299939A
Cited
US4832467A
Cited
JPS6491112A
Cited
US5208080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-16 | 1997-11-15 | 1998-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-16 | 2001-11-15 | 2002-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-16 | 2005-11-15 | 2006-05-17 | $7700.00 | Window Closed / Lapsed |