US3877015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multidigit liquid crystal display device
Assignee: Hitachi Ltd
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Filing: 1973-01-22
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Granted: 1975-04-08
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Expires: 1993-01-22
Abstract
Abstract A liquid crystal display device suitable for multi-digit display in which only the part of the liquid crystal at the segment electrodes in the pattern to be displayed is excited by arranging the electrodes to the device and the leads for connecting the electrodes to the terminals for outer lead connection in such a manner that any lead never overlaps nor crossesover the electrodes or any other lead.
Inventors
- 👤 Mikio Kanazaki
- 👤 Fumio Nakano
- 👤 Hidetoshi Abe
- 👤 Kazuhisa Toriyama
- 👤 Mikio Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:45
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1343; G02F1/134309; G02F1/134327
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
258 words
In a liquid crystal display device comprising a first and a second substrate at least one of which is transparent, a liquid crystal layer intervening between the first and second substrates, segment electrode means intervening between the first substrate and the liquid crystal layer in a configuration corresponding to a pattern to be displayed, opposing electrode means intervening between the second substrate and the liquid crystal layer and positioned opposite the segment electrode means for applying together with the segment electrode means a predetermined voltage to the liquid crystal layer, a first and a second group of leads respectively arranged in the same planes as the segment electrode means and the opposing electrode means for respectively supplying a voltage to the segment electrode means and the opposing electrode means, the segment electrode means consisting of a plurality of segment groups each of which consist of a plurality of segments, only the corresponding segments in the adjacent segment groups being connected through the first lead group, the improvement comprising the opposing electrode means consisting of a plurality of opposed electrodes each of which is arranged independently opposed to the corresponding segment group and each opposed electrode including a plurality of conductive portions corresponding to and in registration with the segments of a segment group, the plurality of conductive portions being electrically separated from one another at areas in registration with the first lead group and interconnected only in areas not in registration with the first lead group, whereby display of the pattern of the first lead group is avoided.
Claim 2
Dependent Claim
258 words
In a liquid crystal display device comprising a first and a second substrate at least one of which is transparent, a liquid crystal layer intervening between the first and second substrates, segment electrode means intervening between the first substrate and the liquid crystal layer in a configuration corresponding to a pattern to be displayed, opposing electrode means intervening between the second substrate and the liquid crystal layer and positioned opposite the segment electrode means for applying together with the segment electrode means a predetermined voltage to the liquid crystal layer, a first and a second group of leads respectively arranged in the same planes as the segment electrode means and the opposing electrode means for respectively supplying a voltage to the segment electrode means and the opposing electrode means, the segment electrode means consisting of a plurality of segment groups each of which consist of a plurality of segments, only the corresponding segments in the adjacent segment groups being connected through the first lead group, the improvement comprising the opposing electrode means consisting of a plurality of opposed electrodes each of which is arranged independently opposed to the corresponding segment group and each opposed electrode including a plurality of conductive portions corresponding to and in registration with the segments of a segment group, the plurality of conductive portions being electrically separated from one another at areas in registration with the first lead group and interconnected only in areas not in registration with the first lead group, whereby display of the pattern of the first lead group is avoided.
Claim 3
Dependent Claim
47 words
A liquid crystal display device according to claim 1, wherein the second group of leads includes a plurality of leads, each respective one of the leads being connected to a respective opposed electrode for applying a predetermined voltage to all the conductive portions of the opposed electrode.
Claim 4
Dependent Claim
278 words
In a liquid crystal device comprising a first and a second substrate at least one of which is transparent, a liquid crystal layer intervening between the first and second substrates, segment electrode means intervening between the first substrate and the liquid crystal layer in a configuration corresponding to a pattern to be displayed, opposing electrode means intervening between the second substrate and the liquid crystal layer and positioned opposite the segment electrode means for applying together with the segment electrode means a predetermined voltage to the liquid crystal layer, a first and a second group of leads respectively arranged in the same planes as the segment electrode means and the opposing electrode means for respectively supplying a voltage to the segment electrode means and the opposing electrode means, the segment electrode means consisting of a plurality of segment groups, each of which consists of a plurality of segments, only the corresponding segments in the adjacent segment groups being connected through the first lead group, the improvement comprising the opposing electrode means consisting of a plurality of opposed electrodes, each of which has substantially the same shape as that of the corresponding segment group and being arranged independently opposed thereto, each opposed electrode including a plurality of conductive portions corresponding to and in registration with the segments of a segment group, the plurality of conductive portions being electrically separated from one another at areas in registration with the first lead group and interconnected only in areas not in registration with the first lead group, the first lead group and the second lead group not being in registration with each other, the segment electrode means and the opposing electrode means.
Claim 5
Dependent Claim
278 words
In a liquid crystal device comprising a first and a second substrate at least one of which is transparent, a liquid crystal layer intervening between the first and second substrates, segment electrode means intervening between the first substrate and the liquid crystal layer in a configuration corresponding to a pattern to be displayed, opposing electrode means intervening between the second substrate and the liquid crystal layer and positioned opposite the segment electrode means for applying together with the segment electrode means a predetermined voltage to the liquid crystal layer, a first and a second group of leads respectively arranged in the same planes as the segment electrode means and the opposing electrode means for respectively supplying a voltage to the segment electrode means and the opposing electrode means, the segment electrode means consisting of a plurality of segment groups, each of which consists of a plurality of segments, only the corresponding segments in the adjacent segment groups being connected through the first lead group, the improvement comprising the opposing electrode means consisting of a plurality of opposed electrodes, each of which has substantially the same shape as that of the corresponding segment group and being arranged independently opposed thereto, each opposed electrode including a plurality of conductive portions corresponding to and in registration with the segments of a segment group, the plurality of conductive portions being electrically separated from one another at areas in registration with the first lead group and interconnected only in areas not in registration with the first lead group, the first lead group and the second lead group not being in registration with each other, the segment electrode means and the opposing electrode means.
Claim 6
Dependent Claim
48 words
A liquid crystal display device according to claim 3, wherein each segment group is formed in a configuration consisting of a pattern of a figure 8 formed by seven segments and one segment representing a decimal point which is arranged in the vicinity of the figure 8 pattern.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |