US4816819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display panel
Assignee: Canon Inc
•
Filing: 1985-11-19
•
Granted: 1989-03-28
•
Expires: 2005-11-19
Abstract
Abstract A display panel having N scanning lines to which scan signal are inputted and M data lines to which information signals are inputted, includes transistor groups each connecting in common plural (n) scanning lines among N scanning lines, and a selector for selecting one of N/n scanning line blocks divided by the transistor groups.
Inventors
- 👤 Masahiko Enari
- 👤 Shinichi Yamashita
- 👤 Satoshi Omata
- 👤 Mitsutoshi Kuno
- 👤 Hiroshi Inoue
- 👤 Yoshiyuki Osada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:24
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3674; G09G3/3677; G09G3/3648; G09G3/3666
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
258 words
A driving apparatus for supplying scan display signals to scanning lines comprising: N scanning lines (G(1), G(2) . . . G(N)) each connected to each one of M signal lines; N first transistors each connected to a different one of said N scanning lines, wherein said first transistors are divided into N/n blocks where n<N; N second transistors each connected to a different one of said scanning lines; a plurality of first gate lines each connected to gates of n first transistors in each of said blocks, wherein each of said first gate lines is cyclically selected; a plurality of first source lines each connected to a source of one of said n transistors in each of said blocks, wherein each of said first source lines is cyclically selected; a second gate line connected to gates of said N second transistors; a second source line connected to sources of said N second transistors; first applying means for applying a positive voltage to said first source line selected from among said first source lines and for applying a negative voltage to the other first source lines; second applying means for applying a positive voltage to said gates of said first transistors connected to said first gate line selected from among said first gate lines; third applying means for applying a negative voltage to said gates of said second transistors in synchronization with said positive voltage supplied to said selected first source line; and fourth applying means for always applying a negative voltage to said sources of said second transistors.
Claim 2
Dependent Claim
258 words
A driving apparatus for supplying scan display signals to scanning lines comprising: N scanning lines (G(1), G(2) . . . G(N)) each connected to each one of M signal lines; N first transistors each connected to a different one of said N scanning lines, wherein said first transistors are divided into N/n blocks where n<N; N second transistors each connected to a different one of said scanning lines; a plurality of first gate lines each connected to gates of n first transistors in each of said blocks, wherein each of said first gate lines is cyclically selected; a plurality of first source lines each connected to a source of one of said n transistors in each of said blocks, wherein each of said first source lines is cyclically selected; a second gate line connected to gates of said N second transistors; a second source line connected to sources of said N second transistors; first applying means for applying a positive voltage to said first source line selected from among said first source lines and for applying a negative voltage to the other first source lines; second applying means for applying a positive voltage to said gates of said first transistors connected to said first gate line selected from among said first gate lines; third applying means for applying a negative voltage to said gates of said second transistors in synchronization with said positive voltage supplied to said selected first source line; and fourth applying means for always applying a negative voltage to said sources of said second transistors.
Claim 3
Dependent Claim
19 words
A driving apparatus according to claim 1, wherein each of said N scanning lines scans a display including pixels.
Claim 4
Dependent Claim
13 words
A driving apparatus according to claim 2, wherein said pixels include liquid crystals.
Claim 5
Dependent Claim
16 words
A driving apparatus according to claim 3, wherein said liquid crystals are twisted nematic liquid crystals.
Claim 6
Dependent Claim
16 words
A driving apparatus according to claim 3, wherein said liquid crystals are chiral smetic liquid crystals.
Claim 7
Dependent Claim
17 words
A driving apparatus according to claim 2, wherein each of said pixels is connected to a transistor.
References Cited (Backward Citations)
US4040721A
Cited
US4386352A
Cited
US4395709A
Cited
US4342994A
Cited
US4447812A
Cited
US4639772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |