US4458987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer liquid crystal panel with sealing members and retainers in registration
Assignee: Hitachi Ltd
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Filing: 1981-07-23
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Granted: 1984-07-10
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Expires: 2001-07-23
Abstract
Abstract A multi-layer liquid crystal panel for a liquid crystal display device having stacked light transmitting substrates of different sizes is disclosed. A retainer is disposed at a position directly beneath a sealing member which seals a first substrate and a second substrate, between the second substrate and a third substrate. The retainer is applied to the substrates simultaneously with the application of the sealing member. The first, second and third substrates are stacked one on the other and pressed to form a multi-layer panel. By virtue of the retainer, the gaps between the respective substrates are maintained uniform over the display area.
Inventors
- 👤 Ken Sasaki
- 👤 Sigeru Matsuyama
- 👤 Masamitsu Naoi
- 👤 Noboru Hoshino
- 👤 Masaharu Koyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:07
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/1347
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
169 words
A multi-layer liquid crystal panel comprising liquid crystal layers between at least three light transmitting substrates including a first substrate, a second substrate larger than said first substrate and a third substrate larger than said second substrate, a sealing member arranged between the periphery of said first substrate and said second substrate for sealing the periphery of said first substrate with respect to said second substrate, a sealing member arranged between the periphery of said second substrate and said third substrate for sealing the periphery of said second substrate with respect to said third substrate, and a retainer disposed between said second substrate and said third substrate at a position in registration with a portion of said sealing member arranged between the periphery of said first substrate and said second substrate so as to maintain a uniform spacing between said second substrate and said third substrate, said retainer being spaced from and surrounded by said sealing member arranged between the periphery of said second substrate and said third substrate.
Claim 2
Dependent Claim
169 words
A multi-layer liquid crystal panel comprising liquid crystal layers between at least three light transmitting substrates including a first substrate, a second substrate larger than said first substrate and a third substrate larger than said second substrate, a sealing member arranged between the periphery of said first substrate and said second substrate for sealing the periphery of said first substrate with respect to said second substrate, a sealing member arranged between the periphery of said second substrate and said third substrate for sealing the periphery of said second substrate with respect to said third substrate, and a retainer disposed between said second substrate and said third substrate at a position in registration with a portion of said sealing member arranged between the periphery of said first substrate and said second substrate so as to maintain a uniform spacing between said second substrate and said third substrate, said retainer being spaced from and surrounded by said sealing member arranged between the periphery of said second substrate and said third substrate.
Claim 3
Dependent Claim
28 words
A multi-layer liquid crystal panel according to claim 1, wherein said retainer is made of a material selected from low melting point glass or an epoxy sealing agent.
Claim 4
Dependent Claim
19 words
A multi-layer liquid crystal panel according to claim 2, wherein spacers are dispersed in the material of said retainer.
Claim 5
Dependent Claim
16 words
A multi-layer liquid crystal panel according to claim 3, wherein said spacers are rod-shaped glass fibers.
Claim 6
Dependent Claim
20 words
A multi-layer liquid crystal panel according to claim 1, wherein said retainer is a continuous member having a linear shape.
Claim 7
Dependent Claim
20 words
A multi-layer liquid crystal panel according to claim 1, wherein said retainer is a discontinuous member having a broken-line shape.
Claim 8
Dependent Claim
20 words
A multi-layer liquid crystal panel according to claim 1, wherein said retainer is a discontinuous member having a dot shape.
Claim 9
Dependent Claim
72 words
A multi-layer liquid crystal panel according to claim 1, wherein said retainer extends in a direction substantially parallel to a portion of said sealing member disposed between the periphery of said second substrate and said third substrate and together with said sealing member arranged between the periphery of said second substrate and said third substrate delimits areas between said second substrate and said third substrate which are in communication with one another.
Claim 10
Dependent Claim
148 words
A multi-layer liquid crystal panel according to claim 1, further comprising a fourth substrate larger than said third substrate, a sealing member arranged between the periphery of said third substrate and said fourth substrate for sealing the periphery of said third substrate with respect to said fourth substrate, and first and second retainers being disposed between said third substrate and said fourth substrate, said first and second retainers being spaced from and surrounded by said sealing member arranged between the periphery of said third substrate and said fourth substrate, said first retainer being disposed at a position in registration with a portion of said sealing member arranged between the periphery of said second substrate and said third substrate, and said second retainer being disposed at a position in registration with a portion of said sealing member arranged between the periphery of said first substrate and said second substrate.
Claim 11
Dependent Claim
35 words
A multi-layer liquid crystal panel according to claim 9, wherein said second retainer is disposed at a position in registration with a portion of said retainer disposed between said second substrate and said third substrate.
Claim 12
Dependent Claim
21 words
A multi-layer liquid crystal panel according to claim 1, wherein said retainer is formed of a material of said sealing member.
References Cited (Backward Citations)
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Cited
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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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |