EP0347913A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Liquid crystal device
Assignee: Canon Inc
•
Filing: 1989-06-22
•
Granted: —
•
Expires: 2009-06-22
Abstract
Abstract A liquid crystal device includes: a pair of substrates (102, 103) disposed spaced apart from each other, a liquid crystal (104) disposed between the substrates and a plurality of adhesive members (106) bonding the substrates (102, 103). The adhesive members (106) are dispersed along the inner surfaces of the substrates (102, 103) at a rate of 100 members/mm² or less with an average adhesion area per member of 1.25 x 10⁻³ mm² or less so as to satisfy the relationship of: S A /S B = 2.5 x 10⁻² - 1.0 %, wherein S A denotes the total area of adhesion given by the adhesive members (106) and S B denotes the area of display given by the liquid crystal device. Spacer members (105) may be further disposed between the substrates (103, 102). The spacer members (105) may preferably be in the form of rods having a length in the range of 1 to 25 µm.
Inventors
- 👤 Yukio Hanyu
- 👤 Osamu Taniguchi
- 👤 Toshiharu Uchimi
- 👤 Masanobu Asaoka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 22:38
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/13392; G02F1/1341; G02F1/137; G02F1/139; G02F1/141
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
111 words
A liquid crystal device, comprising: a pair of substrates disposed spaced apart from each other, a liquid crystal disposed between the substrates and a plurality of adhesive members bonding the substrates; the adhesive members being dispersed along the inner surfaces of the substrates at a rate of 100 members/mm² or less with an average adhesion area per member of 1.25 x 10⁻³ mm² or less so as to satisfy the relationship of: S A /S B = 2.5 x 10⁻² - 1.0 %, wherein S A denotes the total area of adhesion given by the adhesive members and S B denotes the area of display given by the liquid crystal device.
Claim 2
Dependent Claim
111 words
A liquid crystal device, comprising: a pair of substrates disposed spaced apart from each other, a liquid crystal disposed between the substrates and a plurality of adhesive members bonding the substrates; the adhesive members being dispersed along the inner surfaces of the substrates at a rate of 100 members/mm² or less with an average adhesion area per member of 1.25 x 10⁻³ mm² or less so as to satisfy the relationship of: S A /S B = 2.5 x 10⁻² - 1.0 %, wherein S A denotes the total area of adhesion given by the adhesive members and S B denotes the area of display given by the liquid crystal device.
Claim 3
Dependent Claim
20 words
A device according to Claim 1, wherein the adhesive members are dispersed at a rate of 50 members/mm² or less.
Claim 4
Dependent Claim
14 words
A device according to Claim 1, wherein non-adhesive members are disposed between the substrates.
Claim 5
Dependent Claim
20 words
A device according to Claim 3, wherein said non-adhesive members are rigid members in the form of particles or rods.
Claim 6
Dependent Claim
15 words
A device according to Claim 1, wherein said liquid crystal is a ferroelectric liquid crystal.
Claim 7
Dependent Claim
35 words
A device according to Claim 5, wherein said pair of substrates are spaced from each other with a spacing small enough to suppress the formation of the helical alignment structure of the ferroelectric liquid crystal.
Claim 8
Dependent Claim
22 words
A device according to Claim 1, wherein at least one of the pair of substrates has an alignment control film disposed thereon.
Claim 9
Dependent Claim
52 words
A liquid crystal device, comprising: a pair of parallel electrode plates, and a ferroelectric liquid crystal, adhesive particles and spacer members disposed between the electrode plates; said spacers being in the form of rods having a length of 1 - 25 µm and dispersed at a rate of 5 - 100 spacers/mm².
Claim 10
Dependent Claim
52 words
A liquid crystal device, comprising: a pair of parallel electrode plates, and a ferroelectric liquid crystal, adhesive particles and spacer members disposed between the electrode plates; said spacers being in the form of rods having a length of 1 - 25 µm and dispersed at a rate of 5 - 100 spacers/mm².
Claim 11
Dependent Claim
40 words
A device according to Claim 8, wherein said adhesive particles provided a total adhesion area S A (mm²) which is in the range of 2.5 x 10⁻² to 1.0 % of the display area S B (mm²) of the device.
Claim 12
Dependent Claim
36 words
A device according to Claim 8, wherein said pair of electrode plates are spaced from each other with a spacing small enough to suppress the formation of the helical alignment structure of the ferroelectric liquid crystal.
Claim 13
Dependent Claim
23 words
A device according to Claim 8, wherein at least one of the pair of electrode plates has an alignment control film disposed thereon.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.