FR2390059A1 - - Google Patents
Info
- Publication number
- FR2390059A1 FR2390059A1 FR7813187A FR7813187A FR2390059A1 FR 2390059 A1 FR2390059 A1 FR 2390059A1 FR 7813187 A FR7813187 A FR 7813187A FR 7813187 A FR7813187 A FR 7813187A FR 2390059 A1 FR2390059 A1 FR 2390059A1
- Authority
- FR
- France
- Prior art keywords
- image
- level
- peak amplitude
- current
- vary
- 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- Withdrawn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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Receiver Circuits (AREA)
- Processing Of Color Television Signals (AREA)
- Picture Signal Circuits (AREA)
Abstract
L'invention concerne un dispositif, dans un système de traitement d'un signal vidéo representatif d'une image ayant une amplitude de crête déterminant le contraste de l'image et un niveau en courant continu déterminant la luminosité de l'image, et qui comprend un canal de transmission de signaux vidéo et un dispositif reproducteur d'images qui tire du courant en résponse à l'amplitude de crête et au niveau continu du signal vidéo. Selon l'invention, l'appareil comprend un moyen 54 pour dériver un signal de réglage représentant la grandeur du courant moyen tiré par le dispositif reproducteur d'images 41; et un moyen 70, 75, 87 pour coupler le signal de réglage au canal de transmission pour faire varier le niveau en courant continu dans une direction tendant à le limiter au-dessus du niveau de seuil quand le courant le dépasse d'une première quantité et pour faire varier l'amplitude de crête tendant à limiter le courant au-dessus du niveau de seuil quand il le dépasse d'une seconde quantité plus importante. L'invention s'applique notamment aux téléviseurs.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/794,127 US4096518A (en) | 1977-05-05 | 1977-05-05 | Average beam current limiter |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2390059A1 true FR2390059A1 (fr) | 1978-12-01 |
Family
ID=25161792
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7813187A Withdrawn FR2390059A1 (fr) | 1977-05-05 | 1978-05-03 |
Country Status (17)
Country | Link |
---|---|
US (1) | US4096518A (fr) |
JP (1) | JPS53138224A (fr) |
AU (1) | AU519828B2 (fr) |
BE (1) | BE866753A (fr) |
CA (1) | CA1096489A (fr) |
DE (2) | DE2819774B2 (fr) |
ES (1) | ES469494A1 (fr) |
FI (1) | FI781330A (fr) |
FR (1) | FR2390059A1 (fr) |
GB (1) | GB1601305A (fr) |
IT (1) | IT7822870A0 (fr) |
MX (1) | MX4042E (fr) |
NL (1) | NL7804806A (fr) |
NZ (1) | NZ187161A (fr) |
PL (1) | PL118112B1 (fr) |
SE (1) | SE7804891L (fr) |
ZA (1) | ZA782439B (fr) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4207591A (en) * | 1978-02-09 | 1980-06-10 | Rca Corporation | Gated automatic beam current limiter in a video signal processing system |
US4253121A (en) * | 1978-10-12 | 1981-02-24 | Rca Corporation | Plural sequential operating mode automatic kinescope beam current limiter |
US4253110A (en) * | 1979-12-14 | 1981-02-24 | Rca Corporation | Automatic kinescope beam current limiter with sequential control modes |
US4204221A (en) * | 1979-01-31 | 1980-05-20 | Rca Corporation | Predictably biased kinescope driver arrangement in a video signal processing system |
US4203131A (en) * | 1979-01-31 | 1980-05-13 | Rca Corporation | Predictable automatic brightness control circuit in a video signal image reproducing system |
US4209808A (en) * | 1979-03-26 | 1980-06-24 | Rca Corporation | Stabilized automatic brightness control network in a video signal processing system including an automatic kinescope beam current limiter |
JPS6320221Y2 (fr) * | 1979-09-20 | 1988-06-06 | ||
US4589034A (en) * | 1980-12-05 | 1986-05-13 | Canon Kabushiki Kaisha | Image processing apparatus |
JPS6043981A (ja) * | 1983-08-22 | 1985-03-08 | Sony Corp | ビ−ム電流制限回路 |
KR0136382B1 (en) * | 1988-08-11 | 1998-04-27 | Sanyo Electric Co | Circuitry for preventing doming phenomenon in a television and the method thereof |
US5021885A (en) * | 1989-07-07 | 1991-06-04 | Samsung Electronics Co., Ltd. | Automatic brightness limiter |
JPH09312852A (ja) * | 1996-05-22 | 1997-12-02 | Matsushita Electric Ind Co Ltd | 自動ビーム電流制限装置 |
US6897901B2 (en) * | 2001-03-14 | 2005-05-24 | Koninklijke Philips Electronics N.V. | Circuit for combining AKB and selective beam current limiting and projection television system utilizing same |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2021037A1 (de) * | 1970-04-24 | 1971-11-11 | Philips Patentverwaltung | Schaltungsanordnung zur Strahlstrombegrenzung |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL174245B (nl) * | 1951-12-05 | Saint Gobain | Inrichting voor het harden van vooraf gebogen glasplaten. | |
US3543169A (en) * | 1967-10-30 | 1970-11-24 | Bell Telephone Labor Inc | High speed clamping apparatus employing feedback from sample and hold circuit |
US3578903A (en) * | 1968-12-18 | 1971-05-18 | Rca Corp | Control circuits for preventing kinescope color saturation during blooming |
US3597540A (en) * | 1969-04-01 | 1971-08-03 | Motorola Inc | Automatic brightness control responsive to black level of video signal |
US3588341A (en) * | 1969-04-01 | 1971-06-28 | Motorola Inc | Automatic brightness control circuit for establishing the black level of signals in a television reciver |
DE2003455B2 (de) * | 1970-01-27 | 1977-04-28 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zum wiederherstellen der gleichspannungskomponente von videosignalen |
US3885093A (en) * | 1972-04-03 | 1975-05-20 | Ampex | Fast acting direct current clamping circuit |
JPS5528457B2 (fr) * | 1972-07-08 | 1980-07-28 | ||
JPS4929519A (fr) * | 1972-07-13 | 1974-03-16 | ||
JPS5230821Y2 (fr) * | 1973-02-28 | 1977-07-14 | ||
JPS5754983B2 (fr) * | 1974-04-19 | 1982-11-20 |
-
1977
- 1977-05-05 US US05/794,127 patent/US4096518A/en not_active Expired - Lifetime
-
1978
- 1978-04-28 AU AU35548/78A patent/AU519828B2/en not_active Expired
- 1978-04-28 ZA ZA00782439A patent/ZA782439B/xx unknown
- 1978-04-28 IT IT7822870A patent/IT7822870A0/it unknown
- 1978-04-28 SE SE7804891A patent/SE7804891L/xx unknown
- 1978-04-28 FI FI781330A patent/FI781330A/fi not_active Application Discontinuation
- 1978-05-02 GB GB17212/78A patent/GB1601305A/en not_active Expired
- 1978-05-03 CA CA302,568A patent/CA1096489A/fr not_active Expired
- 1978-05-03 FR FR7813187A patent/FR2390059A1/fr not_active Withdrawn
- 1978-05-03 MX MX78100568U patent/MX4042E/es unknown
- 1978-05-03 NL NL7804806A patent/NL7804806A/xx not_active Application Discontinuation
- 1978-05-03 NZ NZ187161A patent/NZ187161A/xx unknown
- 1978-05-04 JP JP5365078A patent/JPS53138224A/ja active Pending
- 1978-05-05 ES ES469494A patent/ES469494A1/es not_active Expired
- 1978-05-05 DE DE2819774A patent/DE2819774B2/de active Granted
- 1978-05-05 PL PL1978206619A patent/PL118112B1/pl unknown
- 1978-05-05 BE BE187437A patent/BE866753A/fr not_active IP Right Cessation
- 1978-05-05 DE DE2819773A patent/DE2819773B2/de not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2021037A1 (de) * | 1970-04-24 | 1971-11-11 | Philips Patentverwaltung | Schaltungsanordnung zur Strahlstrombegrenzung |
Non-Patent Citations (1)
Title |
---|
EXBK/76 * |
Also Published As
Publication number | Publication date |
---|---|
DE2819773B2 (de) | 1981-07-09 |
PL118112B1 (en) | 1981-09-30 |
NL7804806A (nl) | 1978-11-07 |
FI781330A (fi) | 1978-11-06 |
AU519828B2 (en) | 1981-12-24 |
NZ187161A (en) | 1982-03-16 |
JPS53138224A (en) | 1978-12-02 |
DE2819773A1 (de) | 1978-11-16 |
DE2819774A1 (de) | 1978-11-16 |
AU3554878A (en) | 1979-11-01 |
PL206619A1 (pl) | 1979-03-26 |
MX4042E (es) | 1981-11-18 |
DE2819774B2 (de) | 1981-01-22 |
GB1601305A (en) | 1981-10-28 |
DE2819774C3 (fr) | 1988-02-11 |
US4096518A (en) | 1978-06-20 |
IT7822870A0 (it) | 1978-04-28 |
BE866753A (fr) | 1978-09-01 |
ES469494A1 (es) | 1979-03-16 |
CA1096489A (fr) | 1981-02-24 |
SE7804891L (sv) | 1978-11-06 |
ZA782439B (en) | 1979-04-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |