US4175837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochromic display cell
Assignee: Sharp Corp
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Filing: 1978-02-15
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Granted: 1979-11-27
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Expires: 1998-02-15
Abstract
Abstract An electrochromic display cell comprising a display electrode coated with a WO3 film, and an electrolyte disposed in the electrochromic display cell as an ion source. The electrolyte comprises gamma -Butyrolactone mixed with LiClO4, NaClO4 or LiBF4. The WO3 film is formed on the display electrode under the condition where the substrate is heated up to 250 DEG C. through 400 DEG C.
Inventors
- 👤 Kohzo Yano
- 👤 Yasuhiko Inami
- 👤 Hisashi Uede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:43
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1525
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
96 words
An electrochromic display cell comprising two substrates defining the electrochromic display cell, a display electrode formed on one of said two substrates, an electrochromic layer formed on said display electrode, and a liquid electrolyte disposed between said two substrates, wherein said liquid electrolyte comprises γ-Butyrolactone and lithium perchlorate, and said electrochromic layer comprises a transition metal oxide film not soluble in said liquid electrolyte, said transition metal oxide film being formed on said display electrode under the condition where said one of the two substrates is held at a temperature between 250° C. and 400° C.
Claim 2
Dependent Claim
96 words
An electrochromic display cell comprising two substrates defining the electrochromic display cell, a display electrode formed on one of said two substrates, an electrochromic layer formed on said display electrode, and a liquid electrolyte disposed between said two substrates, wherein said liquid electrolyte comprises γ-Butyrolactone and lithium perchlorate, and said electrochromic layer comprises a transition metal oxide film not soluble in said liquid electrolyte, said transition metal oxide film being formed on said display electrode under the condition where said one of the two substrates is held at a temperature between 250° C. and 400° C.
Claim 3
Dependent Claim
18 words
The electrochromic display cell of claim 1, wherein said transition metal oxide film comprises a tungsten oxide film.
Claim 4
Dependent Claim
22 words
The electrochromic display cell of claim 2, wherein said tungsten oxide film is formed through the use of a vacuum deposition method.
Claim 5
Dependent Claim
96 words
An electrochromic display cell comprising two substrates defining the electrochromic display cell, a display electrode formed on one of said two substrates, an electrochromic layer formed on said display electrode, and a liquid electrolyte disposed between said two substrates, wherein said liquid electrolyte comprises γ-Butyrolactone and sodium perchlorate, and said electrochromic layer comprises a transition metal oxide film not soluble in said liquid electrolyte, said transition metal oxide film being formed on said display electrode under the condition where said one of the two substrates is held at a temperature between 250° C. and 400° C.
Claim 6
Dependent Claim
96 words
An electrochromic display cell comprising two substrates defining the electrochromic display cell, a display electrode formed on one of said two substrates, an electrochromic layer formed on said display electrode, and a liquid electrolyte disposed between said two substrates, wherein said liquid electrolyte comprises γ-Butyrolactone and sodium perchlorate, and said electrochromic layer comprises a transition metal oxide film not soluble in said liquid electrolyte, said transition metal oxide film being formed on said display electrode under the condition where said one of the two substrates is held at a temperature between 250° C. and 400° C.
Claim 7
Dependent Claim
18 words
The electrochromic display cell of claim 4, wherein said transition metal oxide film comprises a tungsten oxide film.
Claim 8
Dependent Claim
22 words
The electrochromic display cell of claim 5, wherein said tungsten oxide film is formed through the use of a vacuum deposition method.
Claim 9
Dependent Claim
95 words
An electrochromic display cell comprising two substrates defining the electrochromic display cell, a display electrode formed on one of said two substrates, an electrochromic layer formed on said display electrode, and a liquid electrolyte disposed between said two substrates, wherein said liquid electrolyte comprises γ-Butyrolactone and lithium tetrafluoroborate, and said electrochromic layer comprises a transition metal oxide film not soluble in said liquid electrolyte, said transition metal oxide film being formed on said display electrode under the condition where said one of two substrates is held at a temperature between 250° C. and 400° C.
Claim 10
Dependent Claim
95 words
An electrochromic display cell comprising two substrates defining the electrochromic display cell, a display electrode formed on one of said two substrates, an electrochromic layer formed on said display electrode, and a liquid electrolyte disposed between said two substrates, wherein said liquid electrolyte comprises γ-Butyrolactone and lithium tetrafluoroborate, and said electrochromic layer comprises a transition metal oxide film not soluble in said liquid electrolyte, said transition metal oxide film being formed on said display electrode under the condition where said one of two substrates is held at a temperature between 250° C. and 400° C.
Claim 11
Dependent Claim
18 words
The electrochromic display cell of claim 7, wherein said transition metal oxide film comprises a tungsten oxide film.
Claim 12
Dependent Claim
22 words
The electrochromic display cell of claim 8, wherein said tungsten oxide film is formed through the use of a vacuum deposition method.
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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) | 1982-11-26 | 1983-05-28 | 1983-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-26 | 1987-05-28 | 1987-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-26 | 1991-05-28 | 1991-11-27 | $7700.00 | Window Closed / Lapsed |