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US4331386A Expired / Lapsed US ⏱️ 0.0 years remaining

Electrochromic display cell

Assignee: Sharp Corp
•
Filing: 1980-04-23
•
Granted: 1982-05-25
•
Expires: 2000-04-23
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Abstract

Abstract An electrochromic display cell includes front and rear glass substrates, a liquid electrolyte disposed between the substrates, and a porous ceramic plate disposed in the liquid electrolyte for providing a white display background. Transparent electrodes are formed on the front glass substrate, and electrochromic display segments are formed on each of the transparent electrodes. The transparent electrodes are formed so as to cover the substantially entire display surface of the electrochromic display cell, and electrically separated from each other by a thin gap. The operator observes the porous ceramic plate through the transparent electrodes over the entire display surface, whereby a uniform white background is provided over the entire display surface.

Inventors

  • 👤 Yasuo Minami

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 18:45
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/153; G02F1/155

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 117 words
An electrochromic display cell comprising a front glass substrate, a rear substrate, transparent electrodes formed on the surface of said front glass substrate, electrochromic layers formed on said transparent electrodes, a background creating means disposed between said front glass substrate and said rear substrate in a liquid electrolyte, an insulator layer formed on said front glass substrate in those areas not occupied by said electrochromic layers so as to protect said transparent electrodes from the electrolyte, said transparent electrodes comprising a transparent conductive film formed on substantially the entire display surface of said front glass substrate, said transparent film being interrupted by at least one thin gap formed therein which serves to electrically separate said transparent electrodes.
Claim 2
Dependent Claim 117 words
An electrochromic display cell comprising a front glass substrate, a rear substrate, transparent electrodes formed on the surface of said front glass substrate, electrochromic layers formed on said transparent electrodes, a background creating means disposed between said front glass substrate and said rear substrate in a liquid electrolyte, an insulator layer formed on said front glass substrate in those areas not occupied by said electrochromic layers so as to protect said transparent electrodes from the electrolyte, said transparent electrodes comprising a transparent conductive film formed on substantially the entire display surface of said front glass substrate, said transparent film being interrupted by at least one thin gap formed therein which serves to electrically separate said transparent electrodes.
Claim 3
Dependent Claim 20 words
The electrochromic display cell of claim 1, wherein said thin gap has the width of about 20 through 400 μm.
Claim 4
Dependent Claim 24 words
The electrochromic display cell of claims 1 or 2, wherein said background creating means is a porous ceramic plate for providing a white background.
Claim 5
Dependent Claim 36 words
The electrochromic display cell of claim 3, wherein said electrochromic layers are segment shaped and formed on said transparent conductive film comprising said transparent electrodes, respectively, each transparent electrode being electrically separated by said thin gap.

References Cited (Backward Citations)

US4192581A Cited
US4229080A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1985-05-24 1985-11-23 1986-05-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1989-05-24 1989-11-23 1990-05-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1993-05-24 1993-11-23 1994-05-25 $7700.00 Window Closed / Lapsed

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