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US4816819A Expired / Lapsed US ⏱️ 0.0 years remaining

Display panel

Assignee: Canon Inc
•
Filing: 1985-11-19
•
Granted: 1989-03-28
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Expires: 2005-11-19
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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

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