US4008564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display device
Assignee: Refac International Ltd
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Filing: 1972-06-09
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Granted: 1977-02-22
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Expires: 1992-06-09
Abstract
Abstract A liquid crystal display device comprises a liquid crystal display cell in combination with electronic circuit elements coupled thereto. The liquid crystal cell comprises a layer of a liquid crystal composition between two electrodes having electrode configurations thereon. The circuit elements, which may be in the form of an integrated circuit chip, or discrete elements, or a combination thereof, are mounted on a substrate of the liquid crystal display cell via conductive pads provided on the substrate. The substrate contains a segmented electrode pattern, each segment of which is provided with a lead to an appropriate conductive pad which pads interconnect the segment to one or more circuit elements. A cover or encapsulant may be placed over the liquid crystal display cell or over the entire assembly.
Inventors
- 👤 Nunzio A. Luce
- 👤 Louis A. Zanoni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:34
CPC Classifications
G; G04; G04G; G04G17/00; G04G9/00; G04G9/0023; G04G9/0029; G04G9/0035
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
169 words
A digital electronic watch comprises a liquid crystal display cell, a power supply, an oscillator and associated circuit elements, interconnected for operating said watch, including circuit elements for performing functions of dividing, counting, decoding, and increasing voltage, said liquid crystal display cell of said watch comprises a substrate having thin film segmented electrodes thereon forming numeric character patterns, a support plate having an electrode coating thereon spaced from said substrate by spacer means, an electro-optically active liquid crystal composition in said space between said electrodes of said substrate and support plate, thin film conducting leads on said substrate extending from said electrode segments, said conductive leads terminating on said substrate at a solderable circuit element mounting pad, said associated circuit elements being mounted on said mounting pads and means for sealing said liquid crystal cell, wherein said substrate, segmented electrodes and conductive leads are transparent and wherein said electrode on said support plate is a reflective metal film, said segmented electrodes and conductive leads comprising an indium oxide film.
Claim 2
Dependent Claim
169 words
A digital electronic watch comprises a liquid crystal display cell, a power supply, an oscillator and associated circuit elements, interconnected for operating said watch, including circuit elements for performing functions of dividing, counting, decoding, and increasing voltage, said liquid crystal display cell of said watch comprises a substrate having thin film segmented electrodes thereon forming numeric character patterns, a support plate having an electrode coating thereon spaced from said substrate by spacer means, an electro-optically active liquid crystal composition in said space between said electrodes of said substrate and support plate, thin film conducting leads on said substrate extending from said electrode segments, said conductive leads terminating on said substrate at a solderable circuit element mounting pad, said associated circuit elements being mounted on said mounting pads and means for sealing said liquid crystal cell, wherein said substrate, segmented electrodes and conductive leads are transparent and wherein said electrode on said support plate is a reflective metal film, said segmented electrodes and conductive leads comprising an indium oxide film.
Claim 3
Dependent Claim
161 words
A digital electronic watch comprises watch components including an electro-optic display cell, a power supply, an oscillator and associated circuit elements interconnected for operating said watch, including circuit elements for performing functions of dividing, counting and decoding, said display cell of said watch comprises a substrate having thin film segmented electrodes thereon forming numeric character patterns, a support plate having an electrode coating thereon spaced from said substrate by spacer means, an electro-optically active composition in said space between said electrodes of said substrate and support plate, thin film conductive leads on said substrate extending from said electrode segments, said conductive leads terminating on said substrate at a solderable circuit element mounting pad, said associated circuit elements being mounted on said mounting pads and means for sealing said crystal cell and wherein said watch components are encapsulated in a potting compound, said encapsule including a pair of ears at opposite sides of said watch adapted for attaching a wrist band thereto.
Claim 4
Dependent Claim
161 words
A digital electronic watch comprises watch components including an electro-optic display cell, a power supply, an oscillator and associated circuit elements interconnected for operating said watch, including circuit elements for performing functions of dividing, counting and decoding, said display cell of said watch comprises a substrate having thin film segmented electrodes thereon forming numeric character patterns, a support plate having an electrode coating thereon spaced from said substrate by spacer means, an electro-optically active composition in said space between said electrodes of said substrate and support plate, thin film conductive leads on said substrate extending from said electrode segments, said conductive leads terminating on said substrate at a solderable circuit element mounting pad, said associated circuit elements being mounted on said mounting pads and means for sealing said crystal cell and wherein said watch components are encapsulated in a potting compound, said encapsule including a pair of ears at opposite sides of said watch adapted for attaching a wrist band thereto.
Claim 5
Dependent Claim
15 words
The device recited in claim 2 wherein said potting compound is of a dark color.
References Cited (Backward Citations)
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 |