US4855727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochromic display having a dielectric layer
Assignee: Panasonic Holdings Corp
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Filing: 1986-06-16
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Granted: 1989-08-08
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Expires: 2006-06-16
Abstract
Abstract An electrochromic display device comprises a pair of first and second, opposed insulative substrates, a layer of electrochromic substance sandwiched between the substrates, a transparent display electrode on the first substrate, and a counter electrode on the second substrate. A dielectric layer analogous in pattern to the display electrode is formed on the counter electrode to improve the device's life time and eliminate interference between adjacent display electrodes.
Inventors
- 👤 Soji Tsuchiya
- 👤 Yoshimasa Ito
- 👤 Sadashi Higuchi
- 👤 Akio Yamashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:29
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/153; G02F1/155
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
An electrochromic display device comprising, a pair of first and second, opposed insulative substrates, a layer of an electrochromic substance sandwiched between said substrates, a transparent display electrode on said first substrate, and a counter electrode on said second substrate, said counter electrode including a dielectric region having an area substantially equal to the area of said display electrode in opposed relationship with said display electrode and a conductive region surrounding said dielectric region.
Claim 2
Dependent Claim
74 words
An electrochromic display device comprising, a pair of first and second, opposed insulative substrates, a layer of an electrochromic substance sandwiched between said substrates, a transparent display electrode on said first substrate, and a counter electrode on said second substrate, said counter electrode including a dielectric region having an area substantially equal to the area of said display electrode in opposed relationship with said display electrode and a conductive region surrounding said dielectric region.
Claim 3
Dependent Claim
29 words
An electrochromic display device as claimed in claim 1, wherein said dielectric region is composed of a member selected from the group consisting of inorganic oxides, fluorides and nitrides.
Claim 4
Dependent Claim
17 words
An electrochromic display device as claimed in claim 1, wherein said dielectric region is composed of glass.
Claim 5
Dependent Claim
24 words
An electrochromic display device as clained in claim 1, wherein said dielectric region is analogous in shape to the shape of said display electrode.
Claim 6
Dependent Claim
23 words
An electrochromic display device as claimed in claim 1, wherein said dielectric region is identical in size and pattern to said display electrode.
Claim 7
Dependent Claim
37 words
An electrochromic display device as claimed in claim 1, wherein said conductive region is formed by a conductive layer on said second substrate and said dielectric region is formed by a dielectric layer on said conductive layer.
Claim 8
Dependent Claim
30 words
An electrochromic display device as claimed in claim 1, wherein said second substrate includes a dielectric member and said dielectric region is formed by a part of said dielectric member.
References Cited (Backward Citations)
US3836229A
Cited
DE2815307A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |