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US4457589A Expired / Lapsed US ⏱️ 0.0 years remaining

Electro-optic device with particular location of electrode cross-overs

Assignee: Canon Inc
•
Filing: 1982-01-22
•
Granted: 1984-07-03
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Expires: 2002-01-22
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Abstract

Abstract An electro-optic device comprises a seal spacer provided at the outer peripheral portion of a pair of facing electrode plates and an electro-optic substance arranged within said seal spacer, at least one of said electrode plates being provided with an electrode at outside of said seal spacer, characterized in that the other electrode plate facing the electrode plate with said electrode has a surface facing said electrode outside said seal spacer, the surface being constituted of an insulating substance.

Inventors

  • 👤 Katsuhide Tamura
  • 👤 Yuichi Masaki

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 17:17
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/1345

Claims Analysis

Total Claims: 36
Claim 1
Independent Claim 192 words
An electro-optic device comprising: a pair of electrode plates including a first electrode plate provided with a common electrode having a first lead wire and a second electrode plate facing said first electrode plate, said second electrode plate being provided with a counterelectrode having a second lead wire, and one of said pair of electrode plates having a protruding portion provided with a terminal electrode and a shortcircuit electrode, the shortcircuit electrode being electrically connected to said first lead wire from the common electrode; a seal spacer provided between said pair of electrode plates positioned at an outer peripheral portion of each of said pair of electrode plates, said seal spacer defining an inner and an outer seal line, such that cross-overs between said first lead wire from the common electrode and the said second lead wire from the counterelectrode are formed inside the outer seal line and the electrical connection of the shortcircuit electrode with said first lead wire from the common electrode is formed outside the inner seal line; and an electro-optic substance provided between said pair of electrode plates inside the inner seal line defined by said seal spacer.
Claim 2
Dependent Claim 192 words
An electro-optic device comprising: a pair of electrode plates including a first electrode plate provided with a common electrode having a first lead wire and a second electrode plate facing said first electrode plate, said second electrode plate being provided with a counterelectrode having a second lead wire, and one of said pair of electrode plates having a protruding portion provided with a terminal electrode and a shortcircuit electrode, the shortcircuit electrode being electrically connected to said first lead wire from the common electrode; a seal spacer provided between said pair of electrode plates positioned at an outer peripheral portion of each of said pair of electrode plates, said seal spacer defining an inner and an outer seal line, such that cross-overs between said first lead wire from the common electrode and the said second lead wire from the counterelectrode are formed inside the outer seal line and the electrical connection of the shortcircuit electrode with said first lead wire from the common electrode is formed outside the inner seal line; and an electro-optic substance provided between said pair of electrode plates inside the inner seal line defined by said seal spacer.
Claim 3
Dependent Claim 25 words
An electro-optic device according to claim 1 wherein the pair of electrode plates has a gap with a distance of 0.3 to 30 microns therebetween.
Claim 4
Dependent Claim 25 words
An electro-optic device according to claim 2 wherein the pair of electrode plates has a gap with a distance of 0.6 to 15 microns therebetween.
Claim 5
Dependent Claim 18 words
An electro-optic device according to claim 1 wherein said seal spacer is formed by an adhesive containing glass-fiber.
Claim 6
Dependent Claim 14 words
An electro-optic device according to claim 4, wherein the adhesive is an epoxy adhesive.
Claim 7
Dependent Claim 31 words
An electro-optic device according to claim 1, wherein the electrical connection of the shortcircuit electrode with said first lead wire from the common electrode is carried out by an electroconductive adhesive.
Claim 8
Dependent Claim 21 words
An electro-optic device according to claim 6, wherein the electroconductive adhesive is an epoxy adhesive containing metallic powser or carbon black.
Claim 9
Dependent Claim 15 words
An electro-optic device according to claim 1 wherein the electro-optic material is a liquid crystal.
Claim 10
Dependent Claim 21 words
An electro-optic device according to claim 8 wherein the liquid crystal is a nematic liquid crystal having a negative dielectric anisotropy.
Claim 11
Dependent Claim 16 words
An electro-optic device according to claim 8 wherein the liquid crystal has a positive dielectric anisotropy.
Claim 12
Dependent Claim 24 words
An electro-optic device according to claim 10 wherein the liquid crystal is a mixture of a nematic liquid crystal and an optically active material.
Claim 13
Dependent Claim 17 words
An electro-optic device according to claim 11 wherein the optically active material is a cholesteric liquid crystal.
Claim 14
Dependent Claim 16 words
An electro-optic device according to claim 11 wherein the nematic liquid crystal has a twisted structure.
Claim 15
Dependent Claim 22 words
An electro-optic device according to claim 8 wherein the liquid crystal is a mixture of nematic crystals having a positive dielectric anisotropy.
Claim 16
Dependent Claim 24 words
An electro-optic device according to claim 14 wherein the liquid crystal is a mixture of a nematic liquid crystal and an optically active material.
Claim 17
Dependent Claim 17 words
An electro-optic device according to claim 15 wherein the optically active material is a cholesteric liquid crystal.
Claim 18
Dependent Claim 16 words
An electro-optic device according to claim 15 wherein the nematic liquid crystal has a twisted structure.
Claim 19
Dependent Claim 190 words
An electro-optic device comprising: a pair of electrode plates including a first electrode plate provided with a common electrode having a first lead wire and a second electrode plate facing said first electrode plate, said second electrode plate being provided with a counterelectrode having a second lead wire, and one of said pair of electrode plates having a protruding portion provided with a terminal electrode and a shortcircuit electrode, the shortcircuit electrode being electrically connected to said first lead wire from the counterelectrode; a seal spacer provided between said pair of electrode plates positioned at an outer peripheral portion of each of said pair of electrode plates, said seal spacer defining an inner and an outer seal line, such that cross-overs between said first lead wire from the common electrode and the said second lead wire from the counterelectrode are formed inside the outer seal line and the electrical connection of the shortcircuit electrode with said first lead wire from said counterelectrode is formed outside the inner seal line; and an electro-optic substance provided between said pair of electrode plates inside the inner seal line defined by said seal spacer.
Claim 20
Dependent Claim 190 words
An electro-optic device comprising: a pair of electrode plates including a first electrode plate provided with a common electrode having a first lead wire and a second electrode plate facing said first electrode plate, said second electrode plate being provided with a counterelectrode having a second lead wire, and one of said pair of electrode plates having a protruding portion provided with a terminal electrode and a shortcircuit electrode, the shortcircuit electrode being electrically connected to said first lead wire from the counterelectrode; a seal spacer provided between said pair of electrode plates positioned at an outer peripheral portion of each of said pair of electrode plates, said seal spacer defining an inner and an outer seal line, such that cross-overs between said first lead wire from the common electrode and the said second lead wire from the counterelectrode are formed inside the outer seal line and the electrical connection of the shortcircuit electrode with said first lead wire from said counterelectrode is formed outside the inner seal line; and an electro-optic substance provided between said pair of electrode plates inside the inner seal line defined by said seal spacer.
Claim 21
Dependent Claim 25 words
An electro-optic device according to claim 18 wherein the pair of electrode plates has a gap with a distance of 0.3 to 30 microns therebetween.
Claim 22
Dependent Claim 25 words
An electro-optic device according to claim 19 wherein the pair of electrode plates has a gap with a distance of 0.6 to 15 microns therebetween.
Claim 23
Dependent Claim 18 words
An electro-optic device according to claim 18, wherein said seal spacer is formed by an adhesive containing glass-fiber.
Claim 24
Dependent Claim 14 words
An electro-optic device according to claim 21, wherein the adhesive is an epoxy adhesive.
Claim 25
Dependent Claim 30 words
An electro-optic device according to claim 18, wherein the electrical connection of the shortcircuit electrode with said second lead wire from the counterelectrode is carried out by an electroconductive adhesive.
Claim 26
Dependent Claim 21 words
An electro-optic device according to claim 23, wherein the electroconductive adhesive is an epoxy adhesive containing metallic powder or carbon black.
Claim 27
Dependent Claim 15 words
An electro-optic device according to claim 18, wherein the electro-optic material is a liquid crystal.
Claim 28
Dependent Claim 21 words
An electro-optic device according to claim 25 wherein the liquid crystal is a nematic liquid crystal having a negative dielectric anisotropy.
Claim 29
Dependent Claim 16 words
An electro-optic device according to claim 25 wherein the liquid crystal has a positive dielectric anisotropy.
Claim 30
Dependent Claim 24 words
An electro-optic device according to claim 27 wherein the liquid crystal is a mixture of a nematic liquid crystal and an optically active material.
Claim 31
Dependent Claim 17 words
An electro-optic device according to claim 28 wherein the optically active material is a cholesteric liquid crystal.
Claim 32
Dependent Claim 16 words
An electro-optic device according to claim 28 wherein the nematic liquid crystal has a twisted structure.
Claim 33
Dependent Claim 22 words
An electro-optic device according to claim 25 wherein the liquid crystal is a mixture of nematic crystals having a positive dielectric anisotropy.
Claim 34
Dependent Claim 24 words
An electro-optic device according to claim 31 wherein the liquid crystal is a mixture of a nematic liquid crystal and an optically active material.
Claim 35
Dependent Claim 17 words
An electro-optic device according to claim 32 wherein the optically active material is a cholesteric liquid crystal.
Claim 36
Dependent Claim 16 words
An electro-optic device according to claim 32 wherein the nematic liquid crystal has a twisted structure.

References Cited (Backward Citations)

US3994567A Cited
US3981560A Cited
US4097121A Cited
US4202606A Cited
US4297004A Cited
US4277147A Cited
US4235526A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-07-03 1988-01-02 1988-07-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-07-03 1992-01-02 1992-07-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-07-03 1996-01-02 1996-07-03 $7700.00 Window Closed / Lapsed

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