JPS55112077A - Automatic display distortion correcting device - Google Patents
Automatic display distortion correcting deviceInfo
- Publication number
- JPS55112077A JPS55112077A JP1918279A JP1918279A JPS55112077A JP S55112077 A JPS55112077 A JP S55112077A JP 1918279 A JP1918279 A JP 1918279A JP 1918279 A JP1918279 A JP 1918279A JP S55112077 A JPS55112077 A JP S55112077A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- cross hatch
- chart
- horizontal
- current
- 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
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Details Of Television Scanning (AREA)
Abstract
PURPOSE:To ensure the automatic correction for the display distortion by writing into the nonvolatile memory the deflecting current waveform which gives the coincidence between the pickup signal of the cross hatch chart and the cross hatch chart signal produced electrically and then giving the correction based on the written current. CONSTITUTION:Cross hatch chart 2 is picked up, and at the same time the cross hatch signal is produced electrically based on the horizontal and vertical driving pulses. And the difference is obtained through differential amplifier 25 between the both signals. Then the horizontal/vertical current waveforms are digitized via A/D converters 17 and 30 when no signal exists through cancelling on monitor TV26, and then written into nonvolatile memories 18 and 31. The horizontal deflecting current of memory 18 is read out in the same clock as that of the writing time and then turned into the saw-tooth wave through D/A converter 19 and LPF20 to be compared at comparator 21 with the deflecting current sent from resistance 9 via switch S2. And the difference, if any, is eliminated through the feedback via driving circuit 22 and saturable reactor 8. For the vertical deflection, the error signal is also fed back through saturable reactor 36 and in accordance with the output of comparator 34.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1918279A JPS55112077A (en) | 1979-02-20 | 1979-02-20 | Automatic display distortion correcting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1918279A JPS55112077A (en) | 1979-02-20 | 1979-02-20 | Automatic display distortion correcting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55112077A true JPS55112077A (en) | 1980-08-29 |
| JPS6155823B2 JPS6155823B2 (en) | 1986-11-29 |
Family
ID=11992189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1918279A Granted JPS55112077A (en) | 1979-02-20 | 1979-02-20 | Automatic display distortion correcting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55112077A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57111175A (en) * | 1980-11-07 | 1982-07-10 | Thomson Brandt | Frame scanning current control device for television receiver and receiver inclusing same device |
| JPH02213279A (en) * | 1988-10-31 | 1990-08-24 | Gold Star Co Ltd | Ventrical defecting device of high resolution television receiver |
-
1979
- 1979-02-20 JP JP1918279A patent/JPS55112077A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57111175A (en) * | 1980-11-07 | 1982-07-10 | Thomson Brandt | Frame scanning current control device for television receiver and receiver inclusing same device |
| JPH02213279A (en) * | 1988-10-31 | 1990-08-24 | Gold Star Co Ltd | Ventrical defecting device of high resolution television receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6155823B2 (en) | 1986-11-29 |
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