JPS6444421A - Driving control circuit for liquid crystal shutter - Google Patents
Driving control circuit for liquid crystal shutterInfo
- Publication number
- JPS6444421A JPS6444421A JP62202445A JP20244587A JPS6444421A JP S6444421 A JPS6444421 A JP S6444421A JP 62202445 A JP62202445 A JP 62202445A JP 20244587 A JP20244587 A JP 20244587A JP S6444421 A JPS6444421 A JP S6444421A
- Authority
- JP
- Japan
- Prior art keywords
- contrast
- buffer
- flickering
- level
- outputs
- 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.)
- Pending
Links
Landscapes
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
PURPOSE:To decrease flickering by providing a contrast detecting circuit, a buffer transistor (TR), 1st and 2nd buffer circuits of an open collector type, the outputs of which are connected via resistances to the emitter of the buffer TR and an arithmetic circuit. CONSTITUTION:The signal from the contrast detecting circuit 2 is inputted to the base of the buffer TR and the outputs of the buffer circuits 6, 8 to which AC driving voltage pulses of different phases are inputted via the resistances 10, 12 are inputted to the emitter. The level difference of the pulse voltages appearing in the outputs of the circuits 6, 8 is computed by the arithmetic circuit 14, by which the AC driving pulse voltage corresponding to the contrast of a video signal is obtd. The level of the pulses is low and the flickering is suppressed in the case of the small contrast if a liquid crystal shutter is driven by this pulse voltage. The level of the pulses is large and the shutter is driven in correspondence to the contrast in spite of the generation of some flickering if the contrast is large. The flickering is thus decreased down to a satisfactory level as a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62202445A JPS6444421A (en) | 1987-08-12 | 1987-08-12 | Driving control circuit for liquid crystal shutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62202445A JPS6444421A (en) | 1987-08-12 | 1987-08-12 | Driving control circuit for liquid crystal shutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6444421A true JPS6444421A (en) | 1989-02-16 |
Family
ID=16457643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62202445A Pending JPS6444421A (en) | 1987-08-12 | 1987-08-12 | Driving control circuit for liquid crystal shutter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6444421A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100495798B1 (en) * | 1997-09-09 | 2005-09-20 | 삼성전자주식회사 | LCD and Kickback Voltage Compensation Circuit |
-
1987
- 1987-08-12 JP JP62202445A patent/JPS6444421A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100495798B1 (en) * | 1997-09-09 | 2005-09-20 | 삼성전자주식회사 | LCD and Kickback Voltage Compensation Circuit |
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