US3944330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-optic device
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1973-09-21
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Granted: 1976-03-16
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Expires: 1993-09-21
Abstract
Abstract An electro-optic device comprises a plurality of first electrodes provided on a top substrate and a second electrode provided on a bottom substrate, the first electrodes confronting the second electrode through electro-optical matter which will show electro-optical phenomena by the application of electric field, the first and second electrodes being connected through electrical elements such as resistors or capacitors to a variable voltage source. In this electro-optic device, the electric field applied between the first and second electrodes are partially changed by various means, for instance, by making the areas of the first electrodes different, or by varying the values of the electrical elements such as resistors or capacitors, as a result of which the electro-optical matter shows various electro-optical phenomena.
Inventors
- 👤 Ichiro Tsunoda
- 👤 Satoshi Takeuchi
- 👤 Yoichiro Hirao
- 👤 Takeo Suzuki
- 👤 Yoshihiro Nishiue
- 👤 Katsumasa Tadokoro
- 👤 Toshimasa Fukagawa
- 👤 Isamu Harada
- 👤 Akira Misawa
- 👤 Kazuo Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:23
CPC Classifications
H; H04; H04M; H04M15/00; H04M15/28; H04M15/30; G; G01; G01R; G01R13/00; G01R13/40; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
240 words
An electro-optic device comprising a first transparent substrate, a second substrate juxtaposed to the first substrate, a body of electro-optically variable liquid disposed between said substrates, a plurality of first electrodes disposed on the surface of the first substrate facing the second substrate, each individual one of said plurality of first electrodes having an area different from the area of the others, a second electrode provided on the surface of the second substrate facing the first substrate, said liquid interposing internal impedance between said first electrodes and said second electrode, and a plurality of impedance elements of equal impedance value, external to said substrates and liquid; each of said first electrodes being connected through a respective one of said impedance elements to a terminal of a voltage source, and said second electrode being connected to another terminal of the voltage source, so that there are a plurality of parallel circuits each comprising a respective one of said impedance elements in series with the respective internal impedance between a respective one of said first electrodes and said second electrode, whereby in each of said parallel circuits a first part of the voltage supplied from the voltage source exists across the respective internal impedance and a second part of the voltage from the voltage source exists across the respective impedance element, the ratios of the first part to the second part of the voltage being different at the different respective parallel circuits.
Claim 2
Dependent Claim
240 words
An electro-optic device comprising a first transparent substrate, a second substrate juxtaposed to the first substrate, a body of electro-optically variable liquid disposed between said substrates, a plurality of first electrodes disposed on the surface of the first substrate facing the second substrate, each individual one of said plurality of first electrodes having an area different from the area of the others, a second electrode provided on the surface of the second substrate facing the first substrate, said liquid interposing internal impedance between said first electrodes and said second electrode, and a plurality of impedance elements of equal impedance value, external to said substrates and liquid; each of said first electrodes being connected through a respective one of said impedance elements to a terminal of a voltage source, and said second electrode being connected to another terminal of the voltage source, so that there are a plurality of parallel circuits each comprising a respective one of said impedance elements in series with the respective internal impedance between a respective one of said first electrodes and said second electrode, whereby in each of said parallel circuits a first part of the voltage supplied from the voltage source exists across the respective internal impedance and a second part of the voltage from the voltage source exists across the respective impedance element, the ratios of the first part to the second part of the voltage being different at the different respective parallel circuits.
Claim 3
Dependent Claim
15 words
An electro-optic device as claimed in claim 1 in which said impedance elements are resistors.
Claim 4
Dependent Claim
16 words
An electric-optic device as claimed in claim 1 in which said impedance elements are reactance elements.
Claim 5
Dependent Claim
15 words
An electric-optic device as claimed in claim 3 in which said reactance elements are capacitors.
References Cited (Backward Citations)
US3512826A
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US3647280A
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US3612654A
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US3667039A
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US3674342A
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US3774195A
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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) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |