KR960020427A

KR960020427A - Horizontal Raster Automatic Control Circuit of Television

Info

Publication number: KR960020427A
Application number: KR1019940029547A
Authority: KR
Inventors: 노관형
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1994-11-11
Filing date: 1994-11-11
Publication date: 1996-06-17
Also published as: KR0153220B1

Abstract

본 발명은 텔레비전의 수평라스터 자동제어회로에 관한 것으로, 수평구동 신호에 의해 구동되는 수평구동 트랜지스터(3)와, 그 수평구동 트랜지스터(3)의 스위칭구동에 연동적으로 B+전원이 2차측으로 유기되는 수평 구동 트랜스(8), 그 수평구동 트랜스(8)의 2차측 유기전압에 의해 수평출력을 행하는 수평출력 트랜지스터(10), 그 수평출력 트랜지스터(10)의 작용에 대응하여 귀선시간을 조정하는 복수의 캐패시터(13, 14)와 수평편향 코일(! 5) CRT장치의 수평주사시 화면외곽부의 S자보정을 위한 캐패시터(8)를 포함하여 구성된 텔레비전의 수평편향회로에서, 휘도신호(-Y)를 기초로 APL치의 변화분을 검출하여 그 APL변화분에 대응적으로 상기 S자보정의 용량을 가변적으로 설정하는 수평라스터 제어수단(19)이 더 포함되어 구성되고, 상기 수평라스터 제어수단(19)은 상기 휘도신호(-Y)를 적분하여 APL치를 얻는 적분소자(20,21,22)와, 그 APL치의 전류 또는 전위조정을 위한 소자(23,24)와, 그 전류 또는 전위조정된 휘도신호의 APL치에 의해 전류가변적으로 동작하는 제1트랜지스터(26), 그 제1트랜지스터(26)에 의해 가변되는 전위에 기초하여 ON/OFF작용하는 제2트랜지스터(30), 그 제2트랜지스터(30)의 ON/OFF작용에 의해 상기 S자보정용 캐패시터(18)와 병렬로 접속되거나 비접속되는 캐패시터(31)를 포함하여 구성되어, 수평편향주사시 APL치의 변화분을 검출하여 그 APL치에 적응적으로 S자보정을 위한 용량을 가변시켜 줌으로써 APL치의 변화시에 화면의 라스터크기가 변화되는 일을 방지하도록 된 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal raster automatic control circuit of a television, wherein a B + power supply is connected to a secondary side in conjunction with a horizontal drive transistor (3) driven by a horizontal drive signal and a switching drive of the horizontal drive transistor (3). The return time is adjusted in response to the action of the horizontal drive transformer 8 to be induced, the horizontal output transistor 10 which performs horizontal output by the secondary induced voltage of the horizontal drive transformer 8, and the horizontal output transistor 10. In a horizontal deflection circuit of a television comprising a plurality of capacitors (13, 14) and a horizontal deflection coil (! 5), a capacitor (8) for S-correction of the outer portion of the screen during horizontal scanning of the CRT apparatus, the luminance signal (- And a horizontal raster control means 19 for detecting a change in the APL value based on Y) and variably setting the capacity of the S-shape in response to the APL change. Control means (1 9) the integrating elements 20, 21, 22 for integrating the luminance signal (-Y) to obtain an APL value, the elements 23, 24 for adjusting the current or potential of the APL value, and the current or potential being adjusted. The first transistor 26 which operates in a variable current according to the APL value of the luminance signal, the second transistor 30 which acts on / off based on the potential which is changed by the first transistor 26, and the second transistor And a capacitor 31 connected or disconnected in parallel with the S-shaped correction capacitor 18 by the ON / OFF action of 30, and detects a change in the APL value during horizontal deflection scanning. By varying the capacity for S-shape correction, the raster size of the screen is prevented from changing when the APL value is changed.

Description

Horizontal Raster Automatic Control Circuit of Television

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 본 발명에 따른 텔레비전의 수평라스터 자동제어회로가 부가된 수평편향회로를 나타낸 도면이다.2 is a diagram illustrating a horizontal deflection circuit to which a horizontal raster automatic control circuit of a television according to the present invention is added.

Claims

A horizontal drive transistor 3 driven by the horizontal drive signal, a horizontal drive transformer 8 in which the B + power supply is induced to the secondary side in association with the switching drive of the horizontal drive transistor 3, and the horizontal drive transformer 8 Horizontal output transistor 10 which performs horizontal output by the secondary induced voltage of the plurality of capacitors, a plurality of capacitors 13 and 14 and horizontal deflection coils 15 which adjust spherical time corresponding to the action of the horizontal output transistor 10. In the horizontal deflection circuit of a television comprising a capacitor 8 for the S-shaped correction of the outer portion of the screen during horizontal scanning of the CRT apparatus, a change in the APL value is detected based on the luminance signal (-Y). And horizontal raster control means (19) for variably setting the capacity of the S-shape correction corresponding to the change.

2. The horizontal raster control means (19) according to claim 1, wherein the horizontal raster control means (19) integrates the intensities (20, 21, 22) to obtain an APL value by integrating the luminance signal (-Y), and an element for adjusting the current or potential of the APL value. ON / OFF based on (23, 24), the first transistor 26 which operates in a variable current according to the APL value of the current or potential adjusted luminance signal, and the potential which is changed by the first transistor 26 And a capacitor 31 which is connected or disconnected in parallel with the S-correction capacitor 18 by the ON / OFF action of the second transistor 30 that acts and the second transistor 30. Horizontal raster automatic control circuit of television.

※ Note: The disclosure is based on the initial application.