FR2390874A1 - Circuit de reglage de luminosite avec plage de reglage previsible - Google Patents
Circuit de reglage de luminosite avec plage de reglage previsibleInfo
- Publication number
- FR2390874A1 FR2390874A1 FR7814043A FR7814043A FR2390874A1 FR 2390874 A1 FR2390874 A1 FR 2390874A1 FR 7814043 A FR7814043 A FR 7814043A FR 7814043 A FR7814043 A FR 7814043A FR 2390874 A1 FR2390874 A1 FR 2390874A1
- Authority
- FR
- France
- Prior art keywords
- variations
- control circuit
- adjustment range
- image
- component supply
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/57—Control of contrast or brightness
- H04N5/59—Control of contrast or brightness in dependence upon beam current of cathode ray tube
Abstract
L'invention concerne un système pour former un signal vidéo couleurs représentatif de l'image à partir des sorties d'une alimentation en composante de chrominance et d'une alimentation en composante de luminance, ayant des intervalles d'effacement de l'image périodiquement récurrents entre des intervalles adjacents d'image et contenant un niveau en continu déterminant la luminosité de l'image. Selon l'invention un moyen 81-84 applique une tension, sujette à des variations en corrélation avec les variations de l'amplitude d'un signal de verrouillage, au moyen de réglage de luminosité 90, de façon à agir contre la possibilité de variations du niveau de référence sur lequel est verrouillé le signal de couleurs. L'invention s'applique notamment à la télévision en couleurs.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/796,340 US4135200A (en) | 1977-05-12 | 1977-05-12 | Brightness control circuit with predictable brightness control range |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2390874A1 true FR2390874A1 (fr) | 1978-12-08 |
Family
ID=25167962
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7814043A Withdrawn FR2390874A1 (fr) | 1977-05-12 | 1978-05-11 | Circuit de reglage de luminosite avec plage de reglage previsible |
Country Status (6)
Country | Link |
---|---|
US (1) | US4135200A (fr) |
JP (1) | JPS53141536A (fr) |
AU (1) | AU515001B2 (fr) |
DE (1) | DE2820999C2 (fr) |
FR (1) | FR2390874A1 (fr) |
GB (1) | GB1598591A (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4143398A (en) * | 1978-03-22 | 1979-03-06 | Rca Corporation | Automatic brightness control circuit employing a closed control loop stabilized against disruption by large amplitude video signals |
US4484226A (en) * | 1982-10-14 | 1984-11-20 | Rca Corporation | Automatic kinescope bias control system compensated for kinescope electron gun conduction dissimilarities |
US4598316A (en) * | 1983-05-31 | 1986-07-01 | Rca Corporation | Brightness control network in a video signal processor with AC coupled output stages |
US4580068A (en) * | 1983-12-14 | 1986-04-01 | Rca Corporation | Keyed low impedance voltage source |
GB8521019D0 (en) * | 1985-08-22 | 1986-10-01 | Rank Pullin Controls Ltd | Imaging apparatus |
US5272522A (en) * | 1990-04-30 | 1993-12-21 | Thomson Consumer Electronics, Inc. | Video signal processing circuits |
KR970000851B1 (ko) * | 1992-09-01 | 1997-01-20 | 마쯔시다덴기산교 가부시기가이샤 | 영상신호처리장치 |
KR100285903B1 (ko) * | 1998-03-17 | 2001-04-16 | 윤종용 | 디스플레이장치의 비디오 안정화회로 |
US7409004B2 (en) * | 2001-06-19 | 2008-08-05 | Matsushita Electric Industrial Co., Ltd. | Hybrid polar modulator differential phase Cartesian feedback correction circuit for power amplifier linearization |
US7423697B1 (en) * | 2004-12-16 | 2008-09-09 | Cirrus Logic, Inc. | Method and apparatus for AC coupling a signal while restoring DC levels |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3598912A (en) * | 1969-02-13 | 1971-08-10 | Philips Corp | Video amplifier with black level control |
US3804981A (en) * | 1971-11-08 | 1974-04-16 | Rca Corp | Brightness control |
US3959811A (en) * | 1975-05-23 | 1976-05-25 | Rca Corporation | Set-up arrangement for a color television receiver |
US3970895A (en) * | 1974-09-09 | 1976-07-20 | Rca Corporation | Circuit for maintaining operating point stability of an amplifier |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3502807A (en) * | 1967-03-08 | 1970-03-24 | Rca Corp | Brightness control circuit |
-
1977
- 1977-05-12 US US05/796,340 patent/US4135200A/en not_active Expired - Lifetime
-
1978
- 1978-05-08 AU AU35860/78A patent/AU515001B2/en not_active Expired
- 1978-05-09 GB GB18416/78A patent/GB1598591A/en not_active Expired
- 1978-05-11 JP JP5644478A patent/JPS53141536A/ja active Pending
- 1978-05-11 FR FR7814043A patent/FR2390874A1/fr not_active Withdrawn
- 1978-05-12 DE DE2820999A patent/DE2820999C2/de not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3598912A (en) * | 1969-02-13 | 1971-08-10 | Philips Corp | Video amplifier with black level control |
US3804981A (en) * | 1971-11-08 | 1974-04-16 | Rca Corp | Brightness control |
US3970895A (en) * | 1974-09-09 | 1976-07-20 | Rca Corporation | Circuit for maintaining operating point stability of an amplifier |
US3959811A (en) * | 1975-05-23 | 1976-05-25 | Rca Corporation | Set-up arrangement for a color television receiver |
Non-Patent Citations (2)
Title |
---|
EXBK/69 * |
EXBK/76 * |
Also Published As
Publication number | Publication date |
---|---|
AU3586078A (en) | 1979-12-06 |
US4135200A (en) | 1979-01-16 |
DE2820999C2 (de) | 1982-01-21 |
GB1598591A (en) | 1981-09-23 |
AU515001B2 (en) | 1981-03-12 |
DE2820999A1 (de) | 1978-11-23 |
JPS53141536A (en) | 1978-12-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |