FR2417225A1 - Limiteur automatique des courants de crete des faisceaux - Google Patents

Limiteur automatique des courants de crete des faisceaux

Info

Publication number
FR2417225A1
FR2417225A1 FR7903247A FR7903247A FR2417225A1 FR 2417225 A1 FR2417225 A1 FR 2417225A1 FR 7903247 A FR7903247 A FR 7903247A FR 7903247 A FR7903247 A FR 7903247A FR 2417225 A1 FR2417225 A1 FR 2417225A1
Authority
FR
France
Prior art keywords
current
state
picture tube
peak current
current limiter
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
Application number
FR7903247A
Other languages
English (en)
Other versions
FR2417225B1 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RCA Corp
Original Assignee
RCA Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by RCA Corp filed Critical RCA Corp
Publication of FR2417225A1 publication Critical patent/FR2417225A1/fr
Application granted granted Critical
Publication of FR2417225B1 publication Critical patent/FR2417225B1/fr
Granted legal-status Critical Current

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 dispositif limitant une conduction excessive d'un tube-image. Un moyen dérivant un signal indiquant les variations du courant du tube-image au-dessus d'un seuil choisi comprend un filtre 75 présentant, dans un premier état, une bande passante restreinte ainsi le signal n'indique que des variations à long terme du courant du tube-image 66 et dans un second état, une bande passante considérablement plus large où le signal suit des variations à relativement court terme du courant; le moyen de filtrage 75 passe du premier au second état quand le courant dépasse un niveau prédéterminé. L'invention s'applique notamment aux téléviseurs en couleurs.
FR7903247A 1978-02-09 1979-02-08 Limiteur automatique des courants de crete des faisceaux Granted FR2417225A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/876,238 US4167025A (en) 1978-02-09 1978-02-09 Automatic peak beam current limiter

Publications (2)

Publication Number Publication Date
FR2417225A1 true FR2417225A1 (fr) 1979-09-07
FR2417225B1 FR2417225B1 (fr) 1984-12-28

Family

ID=25367248

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7903247A Granted FR2417225A1 (fr) 1978-02-09 1979-02-08 Limiteur automatique des courants de crete des faisceaux

Country Status (24)

Country Link
US (1) US4167025A (fr)
JP (1) JPS5829033B2 (fr)
AT (1) AT382747B (fr)
AU (1) AU530947B2 (fr)
BE (1) BE873948A (fr)
CA (1) CA1127291A (fr)
CS (1) CS252803B2 (fr)
DD (1) DD141964A5 (fr)
DE (1) DE2905005C2 (fr)
DK (1) DK148110C (fr)
ES (1) ES477608A1 (fr)
FI (1) FI67005C (fr)
FR (1) FR2417225A1 (fr)
GB (1) GB2014409B (fr)
HK (1) HK16487A (fr)
IT (1) IT1111785B (fr)
MX (1) MX4381E (fr)
MY (1) MY8500714A (fr)
NL (1) NL7901015A (fr)
NZ (1) NZ189587A (fr)
PL (1) PL119550B1 (fr)
SE (1) SE438765B (fr)
SU (1) SU1207406A3 (fr)
ZA (1) ZA79451B (fr)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4253121A (en) * 1978-10-12 1981-02-24 Rca Corporation Plural sequential operating mode automatic kinescope beam current limiter
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
US4321513A (en) * 1980-09-08 1982-03-23 Rca Corporation Television receiver high voltage protection circuit
US4451849A (en) * 1982-06-23 1984-05-29 Rca Corporation Plural operating mode ambient light responsive television picture control
US4516152A (en) * 1983-05-23 1985-05-07 Rca Corporation Video signal processor with automatic kinescope white balance and beam current limiter control systems
US4549218A (en) * 1983-09-30 1985-10-22 Rca Corporation On-screen display
US4549217A (en) * 1983-09-30 1985-10-22 Rca Corporation Automatic contrast reduction circuit for a teletext or monitor operation
US4599643A (en) * 1983-12-29 1986-07-08 Rca Corporation Apparatus responsive to plural color video signals for amplitude limiting the video signals to assist beam current limiting
US4554578A (en) * 1984-03-02 1985-11-19 Rca Corporation Error compensated control system in a video signal processor
US4633320A (en) * 1984-03-08 1986-12-30 Rca Corporation Video signal processor with automatic kinescope beam current limiter
US4562479A (en) * 1984-04-26 1985-12-31 Rca Corporation Automatic kinescope beam current limiter
US4689668A (en) * 1986-07-14 1987-08-25 Rca Corporation Auxiliary kinescope beam current limiter with plural cascaded low pass filter and peak detector stages
US4901156A (en) * 1986-12-26 1990-02-13 Goldstart Co., Ltd. Automatic brightness limiting circuit
US5068730A (en) * 1989-04-20 1991-11-26 Thomson Consumer Electronics, Inc. Video control circuit
US5313294A (en) * 1990-03-20 1994-05-17 Rca Thomson Licensing Corporation Beam current limiting arrangement having a peak amplitude, responsive threshold
GB9006250D0 (en) * 1990-03-20 1990-05-16 Rca Licensing Corp Non-linear beam current limiter
US5847773A (en) * 1991-08-30 1998-12-08 Thomson Consumer Electronics, Inc. Video system including apparatus for deactivating an automatic control arrangement
US5200829A (en) * 1991-12-16 1993-04-06 Thomson Consumer Electronics, Inc. Contrast beam current limiting arrangement with secondary brightness beam current limiting provisions
US5177413A (en) * 1992-02-25 1993-01-05 Thomson Consumer Electronics, Inc. Arrangement for generating a beam current indicative signal
KR100214634B1 (ko) * 1996-12-21 1999-08-02 구자홍 프로젝션 티브이의 b색 감마보정 회로
US6563495B1 (en) * 1998-12-21 2003-05-13 Thomson Licensing S.A. Automatic screen saver
US6483557B1 (en) 1999-11-05 2002-11-19 Thomson Licensing Sa Emission control in a video display
US6329770B1 (en) 1999-11-05 2001-12-11 Thomson Licensing S.A. Control of emission in a video display

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848945A (en) * 1973-03-16 1974-11-19 Warwick Electronics Inc Brightness limiting circuit
US3980822A (en) * 1973-02-28 1976-09-14 Sony Corporation Automatic brightness control circuit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1462900A1 (de) * 1966-12-09 1968-12-19 Philips Patentverwaltung Schaltungsanordnung zur Strahlstrombegrenzung einer Elektronenstrahlroehre
US3914545A (en) * 1972-08-02 1975-10-21 Zenith Radio Corp Automatic contrast control utilizing three control signals
US3842201A (en) * 1973-04-09 1974-10-15 Gen Electric Beam current limiter
NL179329C (nl) * 1974-09-09 1986-08-18 Philips Nv Televisieontvanger met een bundelstroombegrenzingsschakeling.
JPS59843Y2 (ja) * 1975-10-20 1984-01-11 ソニー株式会社 テレビジユゾウキ
US4067048A (en) * 1976-08-19 1978-01-03 Rca Corporation Automatic beam current limiter
US4079424A (en) * 1977-02-07 1978-03-14 Rca Corporation Automatic transient beam current limiter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980822A (en) * 1973-02-28 1976-09-14 Sony Corporation Automatic brightness control circuit
US3848945A (en) * 1973-03-16 1974-11-19 Warwick Electronics Inc Brightness limiting circuit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/73 *

Also Published As

Publication number Publication date
ZA79451B (en) 1980-08-27
DK148110C (da) 1985-08-05
BE873948A (fr) 1979-05-29
CA1127291A (fr) 1982-07-06
NZ189587A (en) 1982-12-07
JPS54116832A (en) 1979-09-11
AU4393879A (en) 1979-08-16
MX4381E (es) 1982-04-19
JPS5829033B2 (ja) 1983-06-20
CS252803B2 (en) 1987-10-15
ATA78579A (de) 1986-08-15
US4167025A (en) 1979-09-04
IT7919866A0 (it) 1979-02-02
DE2905005A1 (de) 1979-08-16
MY8500714A (en) 1985-12-31
SE438765B (sv) 1985-04-29
HK16487A (en) 1987-03-06
DE2905005C2 (de) 1982-06-09
ES477608A1 (es) 1979-10-16
CS74479A2 (en) 1987-03-12
SU1207406A3 (ru) 1986-01-23
DK52379A (da) 1979-08-10
FI67005C (fi) 1984-12-10
SE7900954L (sv) 1979-08-10
IT1111785B (it) 1986-01-13
GB2014409B (en) 1982-08-25
PL213321A1 (pl) 1979-12-17
FR2417225B1 (fr) 1984-12-28
AT382747B (de) 1987-04-10
AU530947B2 (en) 1983-08-04
DD141964A5 (de) 1980-05-28
FI790353A (fi) 1979-08-10
FI67005B (fi) 1984-08-31
GB2014409A (en) 1979-08-22
PL119550B1 (en) 1982-01-30
DK148110B (da) 1985-03-04
NL7901015A (nl) 1979-08-13

Similar Documents

Publication Publication Date Title
FR2417225A1 (fr) Limiteur automatique des courants de crete des faisceaux
SE8008551L (sv) Automatisk bildrorstralstrombegrensare med i foljd upptredande arbetssett
JPS56107674A (en) Gradation correcting device of video signal
FR2385270A1 (fr) Circuit d'equilibrage automatique de signaux transmis par un cable
JPS5578680A (en) Solid state pickup device
FR2415931A1 (fr) Dispositif de visualisation de television
ES8103903A1 (es) Perfeccionamientos en sistemas y aparato de polarizacion au-tomatica del cinescopio con inmunidad a las interferencias
FR2396482A1 (fr) Circuit de fixation de niveau perfectionne pour signaux de television en couleur
FR2420888A1 (fr) Circuit de reglage automatique de la luminosite employant une boucle fermee de reglage stabilisee vis-a-vis d'une interruption par des signaux video de grande amplitude
JPS5710583A (en) Automatic diaphragm control method of solidstate image pickup device
US4870297A (en) Circuitry for removing information from, or modifying information in, the vertical interval of a television signal
GB1511003A (en) Black level clamping circuit for a television signal processor
BE902358A (fr) Systeme de reglage automatique de la polarisation pour un dispositif de visualisation d'une image.
FR2391617A1 (fr) Procede et dispositif pour delivrer des signaux numeriques representatifs de signaux video
FR2366762A1 (fr) Dispositif pour l'equilibrage automatique des couleurs de signaux de television en couleurs
FR2529738A1 (fr) Dispositif de detection du courant du niveau du noir d'un tube-image
FR2404363A1 (fr) Perfectionnement a un circuit d'identification pal
US5483291A (en) Power saving video circuit and sync separator
KR920003787A (ko) 흑 레벨보정회로
DE2216949C2 (de) Fernsehkamera
JPS5575388A (en) Color noise suppression device
DE1424748A1 (de) Verstaerker
GB1372434A (en) Gamma correction bandpass amplifier circuits
GB1512149A (en) Colour television
JPS5763973A (en) Automatic noise eliminator

Legal Events

Date Code Title Description
TP Transmission of property