JPS5666975A - Vertical deflecting circuit - Google Patents
Vertical deflecting circuitInfo
- Publication number
- JPS5666975A JPS5666975A JP14374379A JP14374379A JPS5666975A JP S5666975 A JPS5666975 A JP S5666975A JP 14374379 A JP14374379 A JP 14374379A JP 14374379 A JP14374379 A JP 14374379A JP S5666975 A JPS5666975 A JP S5666975A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- fly
- current
- time
- transistor
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
- H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
- H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Abstract
PURPOSE:To swiftly execute a fly-back operation and elevate efficiency of the vertical deflecting circuit, by using the fly-back electric power supply having higher voltage than the scanning supply voltage, in the vertical deflecting circuit of a television set. CONSTITUTION:When an input signal is input to the input terminal during the scanning period of time, the transistors T1, T2 are turned on alternately, and currents I1, I2 flow from the electric power supply VCC. During the fly-back period of time, the current I2 which has been flowing into the deflecting coil 4 becomes an impulse transient current i2 when the transistor T2 is turned off, flows into the capacitor 15, and charges the capacitor 15 with electricity. When the current i2 becomes zero, the current i1 flows through the transistor 16 which has conducted by electric discharge of the capacitor 15, the capacitor 15 is charged with electricity in the reverse 3 direction, and the transistor 16 becomes off. The fly-back time can be shortened by selecting the capacity of the capacitor 15 and the supply voltage VP, and also the value of the supply voltage VCC can be made equal to the voltage applied to the deflection coil 4 during the scanning period time, and therefore the inductance of the deflecting coil 4 can be enlarged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14374379A JPS5911228B2 (en) | 1979-11-05 | 1979-11-05 | vertical deflection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14374379A JPS5911228B2 (en) | 1979-11-05 | 1979-11-05 | vertical deflection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5666975A true JPS5666975A (en) | 1981-06-05 |
| JPS5911228B2 JPS5911228B2 (en) | 1984-03-14 |
Family
ID=15345977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14374379A Expired JPS5911228B2 (en) | 1979-11-05 | 1979-11-05 | vertical deflection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5911228B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1022855A1 (en) * | 1999-01-22 | 2000-07-26 | STMicroelectronics SA | Control device and method for a vertical deflection circuit of a spot scanning a screen, in particular for television or computer monitor |
| FR2788920A1 (en) * | 1999-01-22 | 2000-07-28 | St Microelectronics Sa | Control method for vertical deflection screen sweep circuit, involves using output amplifier stage, principal and auxiliary voltage supplies, and two bidirectional interrupters |
-
1979
- 1979-11-05 JP JP14374379A patent/JPS5911228B2/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1022855A1 (en) * | 1999-01-22 | 2000-07-26 | STMicroelectronics SA | Control device and method for a vertical deflection circuit of a spot scanning a screen, in particular for television or computer monitor |
| FR2788921A1 (en) * | 1999-01-22 | 2000-07-28 | St Microelectronics Sa | METHOD AND DEVICE FOR CONTROLLING A VERTICAL DEVIATION CIRCUIT OF A SPOT SCANNING A SCREEN, PARTICULARLY FOR A TELEVISION OR COMPUTER MONITOR |
| FR2788920A1 (en) * | 1999-01-22 | 2000-07-28 | St Microelectronics Sa | Control method for vertical deflection screen sweep circuit, involves using output amplifier stage, principal and auxiliary voltage supplies, and two bidirectional interrupters |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5911228B2 (en) | 1984-03-14 |
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