US4347265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation of an electrochromic display layer
Assignee: Sharp Corp
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Filing: 1980-02-13
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Granted: 1982-08-31
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Expires: 2000-02-13
Abstract
Abstract An electrochromic display cell comprises two opposing glass substrates, transparent electrodes formed on the glass substrates, electrochromic layers formed on the transparent electrodes, and a liquid electrolyte disposed in the cell. The electrochromic layer is formed in the following manner. A metal compound such as tungsten chloride (WCl 6 ) is dissolved in an organic solvent such as an alcohol to obtain an organic solution including hydroxide (W(OH) 6 ). The organic solution is painted on the transparent electrode and, then calcined to obtain the electrochromic layer including tungsten oxide (WO 3 ).
Inventors
- 👤 Junichi Washo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:22
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1524; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
88 words
A process of making an electrochromic layer comprising the steps of: providing a metallic compound selected from one member of the group consisting of chlorides and ethers of tungsten and molybdenum; dissolving said metallic chloride in an organic alcohol solvent therefor or said metallic ether in an aromic hydrocarbon solvent therefor so as to produce an organic solution; applying said organic solution to the surface of a substrate; and calcining said resulting coated substrate at a temperature of from 200° to 500° C. to produce said electrochromic layer.
Claim 2
Dependent Claim
88 words
A process of making an electrochromic layer comprising the steps of: providing a metallic compound selected from one member of the group consisting of chlorides and ethers of tungsten and molybdenum; dissolving said metallic chloride in an organic alcohol solvent therefor or said metallic ether in an aromic hydrocarbon solvent therefor so as to produce an organic solution; applying said organic solution to the surface of a substrate; and calcining said resulting coated substrate at a temperature of from 200° to 500° C. to produce said electrochromic layer.
Claim 3
Dependent Claim
23 words
The process of claim 1, wherein said metallic compound comprises tungsten chloride and said organic solvent comprises an alcohol for said tungsten chloride.
Claim 4
Dependent Claim
22 words
The process of claim 1, wherein said metallic compound comprises a tungsten ether and said organic solvent comprises an aromatic hydrocarbon therefor.
Claim 5
Dependent Claim
19 words
The process of claim 1, wherein said metallic material is a tungsten compound having included therewith a layer-forming material.
Claim 6
Dependent Claim
26 words
The process of claim 4, wherein said layer-forming material is selected from at least one member of the group consisting of cellulose, starch and polyvinyl alcohol.
Claim 7
Dependent Claim
83 words
A process of making an electrochromic layer comprising the steps of: preparing a tungsten chloride solution in an acetic acid anhydride solvent; heating said solution to a temperature of about 150° C. to obtain an acetic tungsten salt; dissolving said tungsten salt in an alcohol solvent therefor so as to produce tungsten hydroxide; applying said tungsten hydroxide solution to a substrate; and calcining said coated substrate at a temperature of from 200° to 500° C. to form said electrochromic layer comprising tungsten oxide.
Claim 8
Dependent Claim
83 words
A process of making an electrochromic layer comprising the steps of: preparing a tungsten chloride solution in an acetic acid anhydride solvent; heating said solution to a temperature of about 150° C. to obtain an acetic tungsten salt; dissolving said tungsten salt in an alcohol solvent therefor so as to produce tungsten hydroxide; applying said tungsten hydroxide solution to a substrate; and calcining said coated substrate at a temperature of from 200° to 500° C. to form said electrochromic layer comprising tungsten oxide.
Claim 9
Dependent Claim
19 words
The process of claim 6, wherein a layer-forming material is mixed with said tungsten chloride and acetic acid anhydride.
Claim 10
Dependent Claim
26 words
The process of claim 7, wherein said layer-forming material is selected from at least one member of the group consisting of cellulose, starch and polyvinyl alcohol.
Claim 11
Dependent Claim
40 words
A process of preparing an electrochromic display cell which comprises: providing a transparent substrate having formed thereon a transparent electrode; and forming an electrochromic layer on the surface of said transparent electrode according to the process steps of claim 1.
Claim 12
Dependent Claim
49 words
A process of forming an electrochromic display cell which comprises: providing a transparent substrate having formed on the surface thereof a transparent electrode; and forming an electrochromic layer selectively on the surface of said transparent electrode according to the process of claim 6 to produce said electrochromic display cell.
References Cited (Backward Citations)
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JPS54126557A
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GB2028290A
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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) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |