EP0324433A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Liquid crystal device
Assignee: Canon Inc
•
Filing: 1989-01-10
•
Granted: —
•
Expires: 2009-01-10
Abstract
Abstract A liquid crystal device, includes: (a) a first substrate and a second substrate, (b) an elongated first electrode (12a) disposed on the first substrate and an elongated second electrode (12b) disposed on the second substrate so as to intersect the first electrode (12a) and form a pixel (P₂) at the intersection of the first and second electrodes (12a, 12b), (c) a linear projection (13a) disposed along the length of at least one of the first and second electrodes (12a, 12b), and (d) a chiral smectic liquid crystal disposed between the first and second substrates in a thickness small enough to suppress the formation of a helical structure inherent to the chiral smectic liquid crystal in its bulk state. The chiral smectic liquid crystal forms a domain in such an alignment state that the liquid crystal has an inclination of forming or actually forms a pair of a hairpin defect (14) and a lightning defect (15), the hairpin defect (14) being disposed closer to the linear projection (13a) than the lightning defect (15).
Inventors
- 👤 Yukio Hanyu
- 👤 Toshiharu Uchimi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 19:51
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1343; G02F1/134309; G02F1/134336; G02F1/137; G02F1/139; G02F1/141
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
158 words
A liquid crystal device, comprising: (a) a first substrate and a second substrate, (b) an elongated first electrode disposed on the first substrate and an elongated second electrode disposed on the second substrate so as to intersect the first electrode and form a pixel at the intersection of the first and second electrodes, (c) a linear projection disposed along the length of at least one of the first and second electrodes, and (d) a chiral smectic liquid crystal disposed between the first and second substrates in a thickness small enough to suppress the formation of a helical structure inherent to the chiral smectic liquid crystal in its bulk state, said chiral smectic liquid crystal forming a domain in such an alignment state that the liquid crystal has an inclination of forming or actually forms a pair of a hairpin defect and a lightning defect, the hairpin defect being disposed closer to the linear projection than the lightning defect.
Claim 2
Dependent Claim
158 words
A liquid crystal device, comprising: (a) a first substrate and a second substrate, (b) an elongated first electrode disposed on the first substrate and an elongated second electrode disposed on the second substrate so as to intersect the first electrode and form a pixel at the intersection of the first and second electrodes, (c) a linear projection disposed along the length of at least one of the first and second electrodes, and (d) a chiral smectic liquid crystal disposed between the first and second substrates in a thickness small enough to suppress the formation of a helical structure inherent to the chiral smectic liquid crystal in its bulk state, said chiral smectic liquid crystal forming a domain in such an alignment state that the liquid crystal has an inclination of forming or actually forms a pair of a hairpin defect and a lightning defect, the hairpin defect being disposed closer to the linear projection than the lightning defect.
Claim 3
Dependent Claim
23 words
A liquid crystal device according to Claim 1, wherein said linear projection is disposed along each of the elongated first and second electrodes.
Claim 4
Dependent Claim
18 words
A liquid crystal device according to Claim 1 or 2, wherein said linear projection comprises a low-resistivity substance.
Claim 5
Dependent Claim
19 words
A liquid crystal device according to Claim 3, wherein said low-resistivity substance is a metal or a metal alloy.
Claim 6
Dependent Claim
22 words
A liquid crystal device according to Claim 1 or 2, wherein said first and second electrodes are respectively disposed in a plurality.
Claim 7
Dependent Claim
28 words
A liquid crystal device according to Claim 5, wherein a plurality of the first electrodes constitute scanning electrodes and a plurality of the second electrodes constitute data electrodes.
Claim 8
Dependent Claim
129 words
A liquid crystal device, comprising: (a) a first substrate and a second substrate, (b) an elongated projection forming a stepwise elevation extended in one direction on a face of at least one of the first and second substrates, and (d) a chiral smectic liquid crystal disposed between the first and second substrates in a thickness small enough to suppress the formation of a helical structure inherent to the chiral smectic liquid crystal in its bulk state, said chiral smectic liquid crystal forming a domain in such an alignment state that the liquid crystal forms a plurality of adjacent molecular layers each comprising a plurality of molecules, and the molecular layers has a normal thereto intersecting the edge of the stepwise elevation extended in one direction with an intersection angle.
Claim 9
Dependent Claim
129 words
A liquid crystal device, comprising: (a) a first substrate and a second substrate, (b) an elongated projection forming a stepwise elevation extended in one direction on a face of at least one of the first and second substrates, and (d) a chiral smectic liquid crystal disposed between the first and second substrates in a thickness small enough to suppress the formation of a helical structure inherent to the chiral smectic liquid crystal in its bulk state, said chiral smectic liquid crystal forming a domain in such an alignment state that the liquid crystal forms a plurality of adjacent molecular layers each comprising a plurality of molecules, and the molecular layers has a normal thereto intersecting the edge of the stepwise elevation extended in one direction with an intersection angle.
Claim 10
Dependent Claim
21 words
A liquid crystal device according to Claim 7, wherein said intersection angle is in the range of 10 - 80 degrees.
Claim 11
Dependent Claim
21 words
A liquid crystal device according to Claim 7, wherein said intersection angle is in the range of 30 - 60 degrees.
Claim 12
Dependent Claim
25 words
A liquid crystal device according to Claim 7, wherein said elongated projection is disposed on the face of each of the first and second substrates.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.