JPS554192A - Trapezoidal distortion corrector - Google Patents
Trapezoidal distortion correctorInfo
- Publication number
- JPS554192A JPS554192A JP7790678A JP7790678A JPS554192A JP S554192 A JPS554192 A JP S554192A JP 7790678 A JP7790678 A JP 7790678A JP 7790678 A JP7790678 A JP 7790678A JP S554192 A JPS554192 A JP S554192A
- Authority
- JP
- Japan
- Prior art keywords
- screen
- screen angle
- raster
- variation
- terminal
- 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
- Transforming Electric Information Into Light Information (AREA)
Abstract
PURPOSE: To make it possible to select freely a screen angle by automatically correcting the trapezoidal distortion of a raster interlocking with the variation of the screen angle.
CONSTITUTION: The movable axis (terminal V2) of potentiometer 8 interlocks with the mechanical displacement of screen 5. When screen 5 turns from the standard position to position 5b, a voltage at terminal V2 resis and the emitter voltage of relative transistor 27 drops to decrease current Ic of control winding 25, and the inductance of saturable reactor 22 increases. As a result, a difference in current between sides (a) and (b) of the winding separated over and under horizontal polarizing coils 16 to 18 becomes large and can be controlled by increasing the value of the keystone correction, so that the distortion of a raster attending on the variation of the screen angle can be corrected through extremely-stable operation.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7790678A JPS6057789B2 (en) | 1978-06-26 | 1978-06-26 | Keystone distortion correction device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7790678A JPS6057789B2 (en) | 1978-06-26 | 1978-06-26 | Keystone distortion correction device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS554192A true JPS554192A (en) | 1980-01-12 |
JPS6057789B2 JPS6057789B2 (en) | 1985-12-17 |
Family
ID=13647109
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7790678A Expired JPS6057789B2 (en) | 1978-06-26 | 1978-06-26 | Keystone distortion correction device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6057789B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54147627A (en) * | 1978-05-12 | 1979-11-19 | Tetsuya Takigawa | Method of construction of backkfilling injection of covering work segment in shield construction |
JPH01176895A (en) * | 1987-12-29 | 1989-07-13 | Kansui Kogyo Kk | Method and device for repairing water leaked/water intruded section |
US5668595A (en) * | 1992-03-23 | 1997-09-16 | Canon Kabushiki Kaisha | Multi-lens imaging apparatus having a mechanism for combining a plurality of images without displacement of registration |
-
1978
- 1978-06-26 JP JP7790678A patent/JPS6057789B2/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54147627A (en) * | 1978-05-12 | 1979-11-19 | Tetsuya Takigawa | Method of construction of backkfilling injection of covering work segment in shield construction |
JPS5732200B2 (en) * | 1978-05-12 | 1982-07-09 | ||
JPH01176895A (en) * | 1987-12-29 | 1989-07-13 | Kansui Kogyo Kk | Method and device for repairing water leaked/water intruded section |
JPH0340277B2 (en) * | 1987-12-29 | 1991-06-18 | ||
US5668595A (en) * | 1992-03-23 | 1997-09-16 | Canon Kabushiki Kaisha | Multi-lens imaging apparatus having a mechanism for combining a plurality of images without displacement of registration |
Also Published As
Publication number | Publication date |
---|---|
JPS6057789B2 (en) | 1985-12-17 |
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