FR2295662A1 - Scanning raster correction system for colour CRT - is passive in operation and may oscillate at twice line frequency - Google Patents
Scanning raster correction system for colour CRT - is passive in operation and may oscillate at twice line frequencyInfo
- Publication number
- FR2295662A1 FR2295662A1 FR7539282A FR7539282A FR2295662A1 FR 2295662 A1 FR2295662 A1 FR 2295662A1 FR 7539282 A FR7539282 A FR 7539282A FR 7539282 A FR7539282 A FR 7539282A FR 2295662 A1 FR2295662 A1 FR 2295662A1
- Authority
- FR
- France
- Prior art keywords
- passive
- line frequency
- oscillate
- scanning raster
- correction system
- 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)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
The system is used for correcting the scanning raster of the CRT in a colour TV set, so that distortion in the North-South direction is eliminated. The correction circuit is passive in operation, and uses an oscillator circuit connected to the vertical deflection coils; the frequency of operation may be equal to either the line frequency or twice the line frequency. The voltage produced by the circuit is proportional to the deflection of the electron beam. The output voltage of the vertical deflection amplifier (27) modulates the line impulses. The system includes a variable resistor (28) and two diodes (29, 30).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19742460984 DE2460984B1 (en) | 1974-12-21 | 1974-12-21 | PASSIVE NORTH / SOUTH SCREEN CORRECTION FOR VERTICAL DEFLECTION OF THE TUBE, IN PARTICULAR BY COLOR TV RECEIVERS |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2295662A1 true FR2295662A1 (en) | 1976-07-16 |
FR2295662B3 FR2295662B3 (en) | 1978-09-29 |
Family
ID=5934350
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7539282A Granted FR2295662A1 (en) | 1974-12-21 | 1975-12-22 | Scanning raster correction system for colour CRT - is passive in operation and may oscillate at twice line frequency |
Country Status (5)
Country | Link |
---|---|
AU (1) | AU500338B2 (en) |
DE (1) | DE2460984B1 (en) |
FR (1) | FR2295662A1 (en) |
IT (1) | IT1051177B (en) |
NL (1) | NL7514564A (en) |
-
1974
- 1974-12-21 DE DE19742460984 patent/DE2460984B1/en active Pending
-
1975
- 1975-12-08 AU AU87337/75A patent/AU500338B2/en not_active Expired
- 1975-12-15 NL NL7514564A patent/NL7514564A/en not_active Application Discontinuation
- 1975-12-18 IT IT3043475A patent/IT1051177B/en active
- 1975-12-22 FR FR7539282A patent/FR2295662A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
IT1051177B (en) | 1981-04-21 |
FR2295662B3 (en) | 1978-09-29 |
DE2460984B1 (en) | 1976-06-24 |
NL7514564A (en) | 1976-06-23 |
AU8733775A (en) | 1977-06-16 |
AU500338B2 (en) | 1979-05-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |