JPS5498525A - Driving circuit for liquid crystal display unit - Google Patents
Driving circuit for liquid crystal display unitInfo
- Publication number
- JPS5498525A JPS5498525A JP538878A JP538878A JPS5498525A JP S5498525 A JPS5498525 A JP S5498525A JP 538878 A JP538878 A JP 538878A JP 538878 A JP538878 A JP 538878A JP S5498525 A JPS5498525 A JP S5498525A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- polarity
- selection
- synchronizing
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Liquid Crystal Display Device Control (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
PURPOSE: To decrease the range of variation of drive voltage and to make longer the life of liquid crystal, by selecting the voltage fed to the common electrode of liquid crystal cell and by inverting the polarity of video signal in synchronizing with the selection.
CONSTITUTION: The selection means consisting of FF10 and the transistors 13,14 connected to the input terminal 9 which selects the voltage fed to the common electrode of the liquid crystal cell so that the polarity of application can be inverted, is provided. Further, the polarity inversion means consisting of the analog switches 16,17 connected respectively to the video signal input terminals 11,12 of positive and negative polarity inverting the polarity of the drive voltage corresponding to the video signal fed to the X electrode via the serial parallel conversion circuit 7 in synchronizing with the voltage selection and inputting the output and its inverted output of FF10, is provided. Further, the selection means is driven in synchronizing with the selection of screen and the range of change in drive voltage can be reduced.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP538878A JPS5498525A (en) | 1978-01-20 | 1978-01-20 | Driving circuit for liquid crystal display unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP538878A JPS5498525A (en) | 1978-01-20 | 1978-01-20 | Driving circuit for liquid crystal display unit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5498525A true JPS5498525A (en) | 1979-08-03 |
JPS6134312B2 JPS6134312B2 (en) | 1986-08-07 |
Family
ID=11609770
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP538878A Granted JPS5498525A (en) | 1978-01-20 | 1978-01-20 | Driving circuit for liquid crystal display unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5498525A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5528649A (en) * | 1978-08-22 | 1980-02-29 | Seiko Epson Corp | Display system for liquid crystal picture |
JPS5583090A (en) * | 1978-12-19 | 1980-06-23 | Matsushita Electric Ind Co Ltd | Display panel driving device |
JPS56123596A (en) * | 1980-03-03 | 1981-09-28 | Seiko Instr & Electronics | Liquid crystal indicator |
JPS57198491A (en) * | 1981-06-01 | 1982-12-06 | Seiko Instr & Electronics | Image display unit |
JPS58169190A (en) * | 1982-03-30 | 1983-10-05 | セイコーエプソン株式会社 | Liquid crystal display unit |
JPS6249399A (en) * | 1985-08-29 | 1987-03-04 | キヤノン株式会社 | Driving of display panel |
JPH02177679A (en) * | 1989-11-13 | 1990-07-10 | Seiko Epson Corp | Liquid crystal display device |
US6031514A (en) * | 1993-04-28 | 2000-02-29 | Canon Kabushiki Kaisha | Method for driving liquid crystal display device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4828117A (en) * | 1971-08-13 | 1973-04-13 | ||
JPS4862385A (en) * | 1971-10-05 | 1973-08-31 | ||
JPS4974438A (en) * | 1972-10-10 | 1974-07-18 | ||
JPS51124330A (en) * | 1975-04-23 | 1976-10-29 | Seiko Epson Corp | Display circuit |
-
1978
- 1978-01-20 JP JP538878A patent/JPS5498525A/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4828117A (en) * | 1971-08-13 | 1973-04-13 | ||
JPS4862385A (en) * | 1971-10-05 | 1973-08-31 | ||
JPS4974438A (en) * | 1972-10-10 | 1974-07-18 | ||
JPS51124330A (en) * | 1975-04-23 | 1976-10-29 | Seiko Epson Corp | Display circuit |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6258195B2 (en) * | 1978-08-22 | 1987-12-04 | Seiko Epson Corp | |
JPS5528649A (en) * | 1978-08-22 | 1980-02-29 | Seiko Epson Corp | Display system for liquid crystal picture |
JPS5583090A (en) * | 1978-12-19 | 1980-06-23 | Matsushita Electric Ind Co Ltd | Display panel driving device |
JPS56123596A (en) * | 1980-03-03 | 1981-09-28 | Seiko Instr & Electronics | Liquid crystal indicator |
JPS57198491A (en) * | 1981-06-01 | 1982-12-06 | Seiko Instr & Electronics | Image display unit |
JPH0244189B2 (en) * | 1981-06-01 | 1990-10-03 | Seiko Instr & Electronics | |
JPS58169190A (en) * | 1982-03-30 | 1983-10-05 | セイコーエプソン株式会社 | Liquid crystal display unit |
JPH0458036B2 (en) * | 1982-03-30 | 1992-09-16 | Seiko Epson Corp | |
JPS6249399A (en) * | 1985-08-29 | 1987-03-04 | キヤノン株式会社 | Driving of display panel |
JPH0411035B2 (en) * | 1985-08-29 | 1992-02-27 | ||
JPH02177679A (en) * | 1989-11-13 | 1990-07-10 | Seiko Epson Corp | Liquid crystal display device |
JPH0529916B2 (en) * | 1989-11-13 | 1993-05-06 | Seiko Epson Corp | |
US6031514A (en) * | 1993-04-28 | 2000-02-29 | Canon Kabushiki Kaisha | Method for driving liquid crystal display device |
US6683591B2 (en) | 1993-04-28 | 2004-01-27 | Canon Kabushiki Kaisha | Method for driving liquid crystal display device |
Also Published As
Publication number | Publication date |
---|---|
JPS6134312B2 (en) | 1986-08-07 |
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