US4365010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectrochromic generator and display device
Assignee: United States, STATE OF NAVY THE, Secretary of
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Filing: 1981-02-02
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Granted: 1982-12-21
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Expires: 2001-02-02
Abstract
Abstract A photoelectrochromic display device having a semiconductor electrode, and a counterelectrode made of a selected metallic material is presented. The electrode and counterelectrode are immersed in an aqueous solution containing heptyl viologen. The device is usable as a display device, as a storage battery, and as an alternating current photoelectric generator. As a display device, the cell requires only two leads rather than multiple leads and complicated electrical addressing and decoding required for most multi-character displays.
Inventors
- 👤 Allen J. Bard
- 👤 Fu-Ren F. Fan
- 👤 Benjamin Reichman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:53
CPC Classifications
H; H01; H01M; H01M14/00; H01M14/005; G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/153; G02F1/155; H01G; H01G9/00; H01G9/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
77 words
A device usable as a photoelectric cell or as a rechargeable storage battery, comprising: a semiconductor first electrode comprising P-GaAs provided with a first output means connectable to an external circuit, a metallic second electrode provided with a second output means connectable to the external circuit, and an aqueous solution comprising heptyl viologen, the first and second electrodes being immersed in the aqueous solution and illuminatable by light radiation for generating an output at the output means.
Claim 2
Independent Claim
77 words
A device usable as a photoelectric cell or as a rechargeable storage battery, comprising: a semiconductor first electrode comprising P-GaAs provided with a first output means connectable to an external circuit, a metallic second electrode provided with a second output means connectable to the external circuit, and an aqueous solution comprising heptyl viologen, the first and second electrodes being immersed in the aqueous solution and illuminatable by light radiation for generating an output at the output means.
Claim 3
Dependent Claim
87 words
An alternating current photoelectric generator comprising: a semiconductor first electrode comprising P-GaAs provided with a first output means connectable to an external circuit, a metallic second electrode provided with a second output means connectable to the external circuit, and an aqueous solution comprising heptyl viologen, the first and second electrodes being immersed in the aqueous solution and means for illuminating said first electrode by a periodic chopped light illumination source for generating an AC output at the output means for providing AC power to the external circuit.
Claim 4
Dependent Claim
87 words
An alternating current photoelectric generator comprising: a semiconductor first electrode comprising P-GaAs provided with a first output means connectable to an external circuit, a metallic second electrode provided with a second output means connectable to the external circuit, and an aqueous solution comprising heptyl viologen, the first and second electrodes being immersed in the aqueous solution and means for illuminating said first electrode by a periodic chopped light illumination source for generating an AC output at the output means for providing AC power to the external circuit.
Claim 5
Dependent Claim
83 words
A photoelectric display device comprising: a semiconductor first electrode comprising P-GaAs provided with a first output means connectable to an external circuit, a metallic second electrode provided with a second output means connectable to the external circuit, and an aqueous solution comprising heptyl viologen, the first and second electrodes being immersed in the aqueous solution and connectable to an external bias potential, and means for illuminating the first electrode with a raster light beam for forming a display image on the first electrode.
Claim 6
Dependent Claim
83 words
A photoelectric display device comprising: a semiconductor first electrode comprising P-GaAs provided with a first output means connectable to an external circuit, a metallic second electrode provided with a second output means connectable to the external circuit, and an aqueous solution comprising heptyl viologen, the first and second electrodes being immersed in the aqueous solution and connectable to an external bias potential, and means for illuminating the first electrode with a raster light beam for forming a display image on the first electrode.
Claim 7
Dependent Claim
30 words
The display device of claim 3 including external bias potential means and wherein the display image is preservable by disconnecting the first output means from the external bias potential means.
Claim 8
Dependent Claim
34 words
The display device of claim 3 including external bias potential means and wherein the display image is erasable by reversing the polarity of the external bias potential means applied to the respective output means.
Claim 9
Dependent Claim
43 words
The devices of claims 1, 2, 3, 4 or 5 wherein the second electrode comprises a metallic material selected from the group consisting of Cu, Cu oxide, Nb 2 O 5 , H x Nb 2 O 5 , Ni, or Ni oxide.
References Cited (Backward Citations)
US3950077A
Cited
US4242423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-20 | 1986-06-21 | 1986-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-20 | 1990-06-21 | 1990-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-20 | 1994-06-21 | 1994-12-21 | $7700.00 | Window Closed / Lapsed |