US4008950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochromic display cell structure
Assignee: Texas Instruments Inc
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Filing: 1975-07-07
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Granted: 1977-02-22
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Expires: 1995-07-07
Abstract
Abstract An electrochromic display cell having a transparent front panel with an internal conductive coating providing a pleasing external appearance, and masking a counter-electrode affixed thereto; said internal coating having a window area to permit external viewing of display electrodes affixed to the back panel, which is sealed to the front panel with a ring spacer to provide an electrolyte chamber about five to ten mils thick; external electrode contacts to the electrical leads to the display electrodes are arranged on the back or front panel.
Inventors
- 👤 Richard A. Chapman
- 👤 Raymond J. Jasinski
- 👤 William G. Manns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:35
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/153; G02F1/161; G02F1/1533
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
180 words
An electrochromic information display cell comprising: a. a transparent front panel having affixed to its internal surface an opaque metallic coating visible from its external surface to provide a background field for the display cell, said metallic coating having at least one opening therein permitting viewer observation of internal portions of said cell, and a counter-electrode layer affixed to said metallic coating; b. a back panel having affixed to the internal surface thereof at least one display electrode positioned to be viewed through said at least one opening in said metallic coating affixed to said front panel; an electrical contact region corresponding to each of said at least one display electrode and positioned near an edge of said back panel; and an electrically conductive lead coating connecting each electrical contact region with its corresponding display electrode; c. a spacer ring member sealed between said front panel and said back panel, and defining an electrolyte chamber which includes said at least one display electrode and at least a portion of said counter-electrode layer; and d. an electrolyte within said electrolyte chamber.
Claim 2
Dependent Claim
180 words
An electrochromic information display cell comprising: a. a transparent front panel having affixed to its internal surface an opaque metallic coating visible from its external surface to provide a background field for the display cell, said metallic coating having at least one opening therein permitting viewer observation of internal portions of said cell, and a counter-electrode layer affixed to said metallic coating; b. a back panel having affixed to the internal surface thereof at least one display electrode positioned to be viewed through said at least one opening in said metallic coating affixed to said front panel; an electrical contact region corresponding to each of said at least one display electrode and positioned near an edge of said back panel; and an electrically conductive lead coating connecting each electrical contact region with its corresponding display electrode; c. a spacer ring member sealed between said front panel and said back panel, and defining an electrolyte chamber which includes said at least one display electrode and at least a portion of said counter-electrode layer; and d. an electrolyte within said electrolyte chamber.
Claim 3
Dependent Claim
31 words
An electrochromic information display cell as defined in claim 1, wherein said metallic coating has a plurality of openings, each positioned over and corresponding in shape to an individual display electrode.
Claim 4
Dependent Claim
94 words
An electrochromic information display cell as defined in claim 1, wherein said metallic coating has a plurality of openings, each positioned over and outlining a group of display electrodes which constitutes a multi-segment digit of said display and wherein substantially all regions of said back panel viewable through said openings, other than said display electrodes, have affixed thereto coatings of the same material as said display electrodes, but electrically insulated from all other layers and coatings of said cell to serve as a coplanar contrasting background for said display electrodes upon selective energization thereof.
Claim 5
Dependent Claim
107 words
An electrochromic information display cell as defined in claim 1, wherein a group of display electrodes constituting the full display of said cell is affixed to the internal surface of said back panel, said metallic coating having a single opening positioned over and outlining said group of display electrodes and substantially all of the regions of said back panel viewable through said opening other than said display electrodes having affixed thereto coatings of the same material as said display electrodes but electrically insulated from all other layers and coatings of said cell to serve as a coplanar contrasting background for said display electrodes upon selective energization thereof.
Claim 6
Dependent Claim
33 words
An electrochromic information display cell as defined in claim 1, further including means providing an electrically conductive path between said counter-electrode layer and one of said electrical contact regions on said back panel.
Claim 7
Dependent Claim
33 words
An electrochromic information display cell as defined in claim 2, further including means providing an electrically conductive path between said counter-electrode layer and one of said electrical contact regions on said back panel.
Claim 8
Dependent Claim
33 words
An electrochromic information display cell as defined in claim 3, further including means providing an electrically conductive path between said counter-electrode layer and one of said electrical contact regions on said back panel.
Claim 9
Dependent Claim
33 words
An electrochromic information display cell as defined in claim 4, further including means providing an electrically conductive path between said counter-electrode layer and one of said electrical contact regions on said back panel.
Claim 10
Dependent Claim
23 words
An electrochromic information display cell as defined in claim 1, wherein said spacer ring member is between about 5 and 10 mils thick.
Claim 11
Dependent Claim
23 words
An electrochromic information display cell as defined in claim 4, wherein said spacer ring member is between about 5 and 10 mils thick.
Claim 12
Dependent Claim
55 words
An electrochromic information display cell as defined in claim 1, wherein said back panel is different in at least one major dimension from said front panel so as to present said electrical contact region corresponding to each of said at least one display electrode outwardly with respect to the peripheral edge of said front panel.
Claim 13
Dependent Claim
58 words
An electrochromic information display cell as defined in claim 1, wherein the thickness of said spacer ring number in a direction extending between said front panel and said back panel is sufficiently thin such that said electrolyte chamber defined thereby in conjunction with said front panel and said back panel has a depth of less than 25 mils.
References Cited (Backward Citations)
US3708220A
Cited
US3712710A
Cited
US3824582A
Cited
US3827784A
Cited
US3771855A
Cited
US3786499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-22 | 1980-08-23 | 1981-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-22 | 1984-08-23 | 1985-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-22 | 1988-08-23 | 1989-02-22 | $7700.00 | Window Closed / Lapsed |