US5204766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferroelectric liquid crystal cell with particulate adhesive density higher near side
Assignee: Canon Inc
•
Filing: 1992-03-26
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Granted: 1993-04-20
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Expires: 2012-03-26
Abstract
Abstract A liquid crystal cell is constituted a pair of substrates each having an electrode thereon and disposed with their faces having the electrode opposite to each other, a spacer and a particulate adhesive disposed to leave a spacing between the substrates, and a liquid crystal disposed to fill the spacing between the substrates. The particulate adhesive is dispersed at a higher density in a region close to a side of the cell than in a central region of the cell, particularly in a direction of unidirectional alignment axis provided to the substrates. By such uneven distribution of the particulate adhesive, undesirable local thickening of the cell side due to movement of liquid crystal molecules during drive can be suppressed.
Inventors
- 👤 Osamu Taniguchi
- 👤 Shinjiro Okada
- 👤 Hironobu Mizuno
- 👤 Yutaka Inaba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:52
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/13392; G02F1/137; G02F1/139; G02F1/141
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
80 words
A liquid crystal cell, comprising: a pair of substrates each having an electrode thereon and disposed with their faces having the electrode opposite to each other, a spacer and a particulate adhesive disposed to leave a spacing between the substrates, and a liquid crystal disposed to fill the spacing between the substrates, wherein the particulate adhesive is dispersed at a higher density in a region close to a side of the cell than in a central region of the cell.
Claim 2
Dependent Claim
80 words
A liquid crystal cell, comprising: a pair of substrates each having an electrode thereon and disposed with their faces having the electrode opposite to each other, a spacer and a particulate adhesive disposed to leave a spacing between the substrates, and a liquid crystal disposed to fill the spacing between the substrates, wherein the particulate adhesive is dispersed at a higher density in a region close to a side of the cell than in a central region of the cell.
Claim 3
Dependent Claim
55 words
A cell according to claim 1, wherein the substrates are provided with unidirectional alignment axes which are parallel and in the same direction, and said particulate adhesive is dispersed at a higher density on the side of the cell than the central region of the cell in a direction perpendicular to the unidirectional alignment axes.
Claim 4
Dependent Claim
15 words
A cell according to claim 1, wherein said liquid crystal is a ferroelectric liquid crystal.
Claim 5
Dependent Claim
57 words
A cell according to claim 3, wherein said ferroelectric liquid crystal is placed in an alignment state satisfying θ<α+δ, wherein α denotes a pretilt angle, θ denotes a tilt angle and δ denotes an angle of inclination of SmC* layer, and shows at least two stable states providing optical axes forming an angle 2θa therebetween satisfying θ>θa>θ/2.
Claim 6
Dependent Claim
35 words
A cell according to claim 1, wherein the particulate adhesive is dispersed at a density on the side of the cell which is at least two times that in the central region of the cell.
Claim 7
Dependent Claim
61 words
A cell according to claim 1, wherein the substrates are provided with unidirectional alignment axes intersecting each other at an intersection angle of 3-10 degrees, and said particulate adhesive is dispersed at a higher density on the side of the cell than in the central region in a direction perpendicular to a line which divides the intersection angle into equal halves.
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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) | 1996-04-19 | 1996-10-19 | 1997-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-19 | 2000-10-19 | 2001-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-19 | 2004-10-19 | 2005-04-20 | $7700.00 | Window Closed / Lapsed |