US4447131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal driving apparatus
Assignee: Canon Inc
•
Filing: 1982-02-25
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Granted: 1984-05-08
•
Expires: 2002-02-25
Abstract
Abstract A liquid crystal driving apparatus comprises a plural number of first signal lines arranged on the front surface of a liquid crystal panel, a plural number of second signal lines arranged on the back surface of the liquid crystal panel in the direction intersecting the first signal lines at right angles, third signal lines arranged between the first signal lines, fourth signal lines arranged between the second signal lines, and a time division driving signal generator and a selection driving signal generator. The time division driving signal generator supplies time division driving signals to the first and fourth signal lines. In synchronism with the time division driving signals generated by the time division driving signal generator, the selection driving signal generator supplies selection driving signals to the second and third signal lines.
Inventors
- 👤 Tsunenori Soma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:00
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3622; G09G3/3644
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
Apparatus for driving liquid crystal that defines a liquid crystal panel having two surfaces, said apparatus comprising: a first signal line group arranged on one surface of said liquid crystal panel; a second signal line group arranged on another surface of said liquid crystal panel and disposed in the direction which intersects the lines of said first group at right angles; a third signal line group arranged between the lines of said first group; a fourth signal line group arranged between the lines of said second group; time division driving signal generating means for supplying time division driving signals to said first and fourth signal line groups; and selection driving signal generating means for supplying selection driving signals to said second and third signal line groups in synchronism with the time division driving signals generated by said time division driving signal generating means.
Claim 2
Dependent Claim
143 words
Apparatus for driving liquid crystal that defines a liquid crystal panel having two surfaces, said apparatus comprising: a first signal line group arranged on one surface of said liquid crystal panel; a second signal line group arranged on another surface of said liquid crystal panel and disposed in the direction which intersects the lines of said first group at right angles; a third signal line group arranged between the lines of said first group; a fourth signal line group arranged between the lines of said second group; time division driving signal generating means for supplying time division driving signals to said first and fourth signal line groups; and selection driving signal generating means for supplying selection driving signals to said second and third signal line groups in synchronism with the time division driving signals generated by said time division driving signal generating means.
Claim 3
Dependent Claim
32 words
Apparatus as set forth in claim 1, which further comprises memory means for memorizing address data corresponding to the selection driving signals to be generated by said selection driving signal generating means.
Claim 4
Dependent Claim
54 words
Apparatus as set forth in claim 1, which further comprises a fifth signal line group for connecting said first signal line group to said fourth signal line group so as to supply to said first and fourth signal line groups the time division driving signals generated by said time division driving signal generating means.
Claim 5
Dependent Claim
145 words
Apparatus for driving liquid crystal that defines a liquid crystal panel having two surfaces, said apparatus comprising: a first signal line group arranged on one surface of said liquid crystal panel; a second signal line group arranged on another surface of said liquid crystal panel; a third signal line group arranged on the same surface of said liquid crystal panel as is said first signal line group; a fourth signal line group arranged on the same surface of said liquid crystal panel as is said second signal line group; time division driving signal generating means for supplying time division driving signals to said first and fourth signal line groups; and selection driving signal generating means for supplying selection driving signals to said second and third signal line groups in synchronism with the time division driving signals generated by said time division driving signal generating means.
Claim 6
Dependent Claim
145 words
Apparatus for driving liquid crystal that defines a liquid crystal panel having two surfaces, said apparatus comprising: a first signal line group arranged on one surface of said liquid crystal panel; a second signal line group arranged on another surface of said liquid crystal panel; a third signal line group arranged on the same surface of said liquid crystal panel as is said first signal line group; a fourth signal line group arranged on the same surface of said liquid crystal panel as is said second signal line group; time division driving signal generating means for supplying time division driving signals to said first and fourth signal line groups; and selection driving signal generating means for supplying selection driving signals to said second and third signal line groups in synchronism with the time division driving signals generated by said time division driving signal generating means.
Claim 7
Dependent Claim
32 words
Apparatus as set forth in claim 4, which further comprises memory means for memorizing address data corresponding to the selection driving signals to be generated by said selection driving signal generating means.
References Cited (Backward Citations)
US3848247A
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US4119367A
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US4231035A
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US4308534A
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US4392131A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |