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ES8303868A1 - Arrangement for automatically controlling the bias voltage of a picture tube - Google Patents

Arrangement for automatically controlling the bias voltage of a picture tube

Info

Publication number
ES8303868A1
ES8303868A1 ES508857A ES508857A ES8303868A1 ES 8303868 A1 ES8303868 A1 ES 8303868A1 ES 508857 A ES508857 A ES 508857A ES 508857 A ES508857 A ES 508857A ES 8303868 A1 ES8303868 A1 ES 8303868A1
Authority
ES
Spain
Prior art keywords
cathode
bias voltage
current
picture
arrangement
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.)
Expired
Application number
ES508857A
Other languages
Spanish (es)
Other versions
ES508857A0 (en
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
Priority claimed from US06/295,118 external-priority patent/US4387405A/en
Application filed by RCA Corp filed Critical RCA Corp
Publication of ES8303868A1 publication Critical patent/ES8303868A1/en
Publication of ES508857A0 publication Critical patent/ES508857A0/en
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/16—Picture reproducers using cathode ray tubes
    • H04N9/18—Picture reproducers using cathode ray tubes using separate electron beams for the primary colour signals
    • H04N9/20—Picture reproducers using cathode ray tubes using separate electron beams for the primary colour signals with more than one beam in a tube

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
  • Picture Signal Circuits (AREA)

Abstract

The subject-matter of the invention is an arrangement, used in a system processing video signals, for automatically monitoring and controlling the blanking current (black-level current) of a picture reproduction tube. During periodic monitoring intervals in which no picture signals appear, an output signal is generated at the cathode of the picture tube which is proportional to the black level of the cathode current. This cathode signal is produced as a reaction to a grid control pulse applied during the monitoring interval. The cathode signal produced is processed in a digital signal processing circuit (70, 76, 77) in order to generate a control voltage which changes step by step and which, if necessary, changes the cathode bias voltage in such a direction that a desired value for the black level cathode current is obtained. To prevent the system from starting to oscillate in the vicinity of the correct cathode bias voltage, the grid control pulses (GP2) are given a special shape in particular development of the invention.
ES508857A 1981-01-26 1982-01-19 "IMPROVEMENTS INTRODUCED IN AN ARRANGEMENT TO TREAT A REPRESENTATIVE VIDEO FREQUENCY SIGNAL OF AN IMAGE". Granted ES508857A0 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8102271 1981-01-26
US06/295,118 US4387405A (en) 1971-01-26 1981-08-21 Automatic kinescope bias control system with digital signal processing

Publications (2)

Publication Number Publication Date
ES8303868A1 true ES8303868A1 (en) 1983-02-01
ES508857A0 ES508857A0 (en) 1983-02-01

Family

ID=26278222

Family Applications (1)

Application Number Title Priority Date Filing Date
ES508857A Granted ES508857A0 (en) 1981-01-26 1982-01-19 "IMPROVEMENTS INTRODUCED IN AN ARRANGEMENT TO TREAT A REPRESENTATIVE VIDEO FREQUENCY SIGNAL OF AN IMAGE".

Country Status (10)

Country Link
AT (1) AT384923B (en)
AU (1) AU542353B2 (en)
CA (1) CA1175562A (en)
DE (1) DE3202396C2 (en)
ES (1) ES508857A0 (en)
FI (1) FI73107C (en)
FR (1) FR2498864B1 (en)
HK (1) HK19487A (en)
IT (1) IT1151702B (en)
SE (1) SE451780B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4521811A (en) * 1984-05-02 1985-06-04 Rca Corporation Beam current limiting arrangement for a digital television system
US4641194A (en) * 1984-08-27 1987-02-03 Rca Corporation Kinescope driver in a digital video signal processing system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3670100A (en) * 1971-03-29 1972-06-13 Telemation Automatic reference level set for television cameras
US4263622A (en) * 1979-01-30 1981-04-21 Rca Corporation Automatic kinescope biasing system
US4277798A (en) * 1979-04-18 1981-07-07 Rca Corporation Automatic kinescope biasing system with increased interference immunity

Also Published As

Publication number Publication date
CA1175562A (en) 1984-10-02
AU542353B2 (en) 1985-02-21
IT8219284A0 (en) 1982-01-25
FR2498864B1 (en) 1988-06-10
FI820159L (en) 1982-07-27
HK19487A (en) 1987-03-13
ATA26982A (en) 1987-06-15
FI73107C (en) 1987-08-10
DE3202396A1 (en) 1982-10-07
AU7962682A (en) 1982-08-05
ES508857A0 (en) 1983-02-01
SE451780B (en) 1987-10-26
SE8200281L (en) 1982-07-27
IT1151702B (en) 1986-12-24
FI73107B (en) 1987-04-30
DE3202396C2 (en) 1985-07-18
FR2498864A1 (en) 1982-07-30
AT384923B (en) 1988-01-25

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