JPS5632875A - Beam index type color television receiver - Google Patents

Beam index type color television receiver

Info

Publication number
JPS5632875A
JPS5632875A JP10954579A JP10954579A JPS5632875A JP S5632875 A JPS5632875 A JP S5632875A JP 10954579 A JP10954579 A JP 10954579A JP 10954579 A JP10954579 A JP 10954579A JP S5632875 A JPS5632875 A JP S5632875A
Authority
JP
Japan
Prior art keywords
focus
state
signal
voltage
output
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
JP10954579A
Other languages
Japanese (ja)
Other versions
JPS6232877B2 (en
Inventor
Katsuo Isono
Hidehiko Isowa
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP10954579A priority Critical patent/JPS5632875A/en
Publication of JPS5632875A publication Critical patent/JPS5632875A/en
Publication of JPS6232877B2 publication Critical patent/JPS6232877B2/ja
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
    • H04N9/22—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information
    • H04N9/24—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information using means, integral with, or external to, the tube, for producing signal indicating instantaneous beam position

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

PURPOSE:To adjust a focus automatically to the best state by controlling the level of DC voltage FV of the focus by the phase comparison output of a phase comparator that detects the state of the focus. CONSTITUTION:To focus electrode 14, a signal obtained by superposing an AC signal out of phase with signal SX on DC voltage FV is supplied and then amplitude- modulated according to the state of index signal S1. In an over-focus state, SH voltage EH of sample holding (SH) circuit 70 is small in a vertical period in which the said SX is at a high level and large in another vertical period when signal SX is at a low level. As a result, the negative-side output of phase comparison output (differential amplifier 83) of phase comparator 80 becomes greater than the positive- side output to increase the output of DC-DC converter 50 and the said FV supplied to the said electrode 14 rises, thereby obtaining the just-focus state. In an under- focus state, the said FV falls to the contrary and the just-focus state can be obtained.
JP10954579A 1979-08-28 1979-08-28 Beam index type color television receiver Granted JPS5632875A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10954579A JPS5632875A (en) 1979-08-28 1979-08-28 Beam index type color television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10954579A JPS5632875A (en) 1979-08-28 1979-08-28 Beam index type color television receiver

Publications (2)

Publication Number Publication Date
JPS5632875A true JPS5632875A (en) 1981-04-02
JPS6232877B2 JPS6232877B2 (en) 1987-07-17

Family

ID=14512957

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10954579A Granted JPS5632875A (en) 1979-08-28 1979-08-28 Beam index type color television receiver

Country Status (1)

Country Link
JP (1) JPS5632875A (en)

Also Published As

Publication number Publication date
JPS6232877B2 (en) 1987-07-17

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