JPS5516507A - Detector for vertical center position on television picture screen - Google Patents
Detector for vertical center position on television picture screenInfo
- Publication number
- JPS5516507A JPS5516507A JP8777778A JP8777778A JPS5516507A JP S5516507 A JPS5516507 A JP S5516507A JP 8777778 A JP8777778 A JP 8777778A JP 8777778 A JP8777778 A JP 8777778A JP S5516507 A JPS5516507 A JP S5516507A
- Authority
- JP
- Japan
- Prior art keywords
- center position
- screen
- vertical center
- vertical
- detected
- 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
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Details Of Television Scanning (AREA)
Abstract
PURPOSE: To detect and adjust the vertical center position of a picture screen at a high speed and with high precision.
CONSTITUTION: While no video signal arrives from the antenna terminal after the vertically-synchronous tuning of a TV screen to be tested, the vertical free oscillation frequency of the TV chassis circuit is detected by the deflecting-yoke leakage magnetic field detection coil to obtain a difference with the center value of a vertically-synchronous tunable frequency. Next, center-position variation value Δl1 in the vertical direction of the screen corresponding to this difference is calculated through conversion. Next, a horizontal-light pattern inserted at the vertical center position of a signal is displayed on the screen and then detected by using a TV camera to obtain shift value Δl0 from the geometric center position of the screen and this is corrected by using Δl1, thereby deciding on and displaying whether the vertical center position has been adjusted into a fixed range or not.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8777778A JPS5516507A (en) | 1978-07-20 | 1978-07-20 | Detector for vertical center position on television picture screen |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8777778A JPS5516507A (en) | 1978-07-20 | 1978-07-20 | Detector for vertical center position on television picture screen |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5516507A true JPS5516507A (en) | 1980-02-05 |
Family
ID=13924403
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8777778A Pending JPS5516507A (en) | 1978-07-20 | 1978-07-20 | Detector for vertical center position on television picture screen |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5516507A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61278275A (en) * | 1985-06-03 | 1986-12-09 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | Automatic display screen adjustor |
-
1978
- 1978-07-20 JP JP8777778A patent/JPS5516507A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61278275A (en) * | 1985-06-03 | 1986-12-09 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | Automatic display screen adjustor |
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