US4278329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochromic device with transmissive counter electrode
Assignee: AGC Inc
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Filing: 1979-06-05
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Granted: 1981-07-14
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Expires: 1999-06-05
Abstract
Abstract An improved counter electrode used in an electrochromic device is transmissive in both charge injection and extraction states and exhibits excellent reversibility whereby it is optimum as a counter electrode in a transmissive electrochromic device which is useful as a display device in its control of visible and infrared absorption by a window and the like.
Inventors
- 👤 Kenzi Matsuhiro
- 👤 Yasushi Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:21
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/153; G02F1/155; G02F1/1514; G02F1/1523; G02F1/1524
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
In an electrochromic device comprising two transparent substrates, each having formed thereon a transparent conductive film which face each other; first and second electrochromic films which are formed on the transparent conductive films; an electrolyte containing ions capable of changing the optical properties of the electrochromic film and a sealant for sealing the electrolyte between the two substrates, wherein the improvement comprises: said first electrochromic film being formed of a substance whose optical properties in the range of visible light change in response to the injection and extraction of said ions; and said second electrochromic film being formed of a substance whose optical properties in the range of visible light do not change in response to the injection and extraction of said ions.
Claim 2
Dependent Claim
123 words
In an electrochromic device comprising two transparent substrates, each having formed thereon a transparent conductive film which face each other; first and second electrochromic films which are formed on the transparent conductive films; an electrolyte containing ions capable of changing the optical properties of the electrochromic film and a sealant for sealing the electrolyte between the two substrates, wherein the improvement comprises: said first electrochromic film being formed of a substance whose optical properties in the range of visible light change in response to the injection and extraction of said ions; and said second electrochromic film being formed of a substance whose optical properties in the range of visible light do not change in response to the injection and extraction of said ions.
Claim 3
Dependent Claim
53 words
An electrochromic device according to claim 1 wherein said second electrochromic film is a crystalline tungsten oxide film having porous structure formed by depositing by a vacuum evaporation in a vacuum degree of from 5×10 -4 to 2×10 -3 torr on the transparent conductive film and baking at from 350° to 450° C.
Claim 4
Dependent Claim
30 words
An electrochromic device according to claim 1 wherein said first electrochromic film is an amorphous film containing tungsten oxide and said second electrochromic is a crystalline film containing tungsten oxide.
Claim 5
Dependent Claim
97 words
An electrochromic device having a laminated structure comprising: a transparent substrate; a first electrochromic film made of a substance having the property that a reversible injection and extraction of anions and electrons does not change its optical properties in the range of visible light; an insulating film in which anions may be injected, but electrons may not be substantially injected; a second electrochromic film made of a substance having the property that a reversible injection and extraction of anions and electrons does change its optical properties in the range of visible light; and a transparent conductive film.
Claim 6
Dependent Claim
97 words
An electrochromic device having a laminated structure comprising: a transparent substrate; a first electrochromic film made of a substance having the property that a reversible injection and extraction of anions and electrons does not change its optical properties in the range of visible light; an insulating film in which anions may be injected, but electrons may not be substantially injected; a second electrochromic film made of a substance having the property that a reversible injection and extraction of anions and electrons does change its optical properties in the range of visible light; and a transparent conductive film.
Claim 7
Dependent Claim
32 words
An electrochromic device according to claim 4 wherein said first electrochromic film is a crystalline film containing tungsten oxide which has a porous structure being capable of injection and extraction of ions.
Claim 8
Dependent Claim
32 words
An electrochromic device according to claim 4 wherein said second electrochromic film is an amorphous film containing tungsten oxide which has a porous structure being capable of injection and extraction of ions.
References Cited (Backward Citations)
US4182551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |