KR960036610A - Brightness Control Device for Wide Television - Google Patents

Brightness Control Device for Wide Television Download PDF

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Publication number
KR960036610A
KR960036610A KR1019950007408A KR19950007408A KR960036610A KR 960036610 A KR960036610 A KR 960036610A KR 1019950007408 A KR1019950007408 A KR 1019950007408A KR 19950007408 A KR19950007408 A KR 19950007408A KR 960036610 A KR960036610 A KR 960036610A
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KR
South Korea
Prior art keywords
abl
screen mode
circuit
wide television
voltage level
Prior art date
Application number
KR1019950007408A
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Korean (ko)
Inventor
고춘석
Original Assignee
배순훈
대우전자 주식회사
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.)
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Publication date
Application filed by 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019950007408A priority Critical patent/KR960036610A/en
Publication of KR960036610A publication Critical patent/KR960036610A/en

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Abstract

본 발명은 와이드 텔레비전에서 시청자에 의해 화면모드가 절환되면 플라이백 트랜스포머의 ABL단자로의 비임전류량을 제어하여 ABL회로에서의 출력전압에는 아무런 변동이 없도록 함으로써 화면모드절환에 따른 화면밝기의 차이를 보정하여 주도록 한 와이드 텔레비전의 휘도조절장치를 제공하기 위한 것이다.According to the present invention, when a screen mode is switched by a viewer in a wide television, the difference in screen brightness according to screen mode switching is corrected by controlling the amount of beam current to the ABL terminal of the flyback transformer so that there is no change in the output voltage in the ABL circuit. To provide a brightness control device for a wide television.

이를 위해 본 발명은, 휘도제어신호를 입력받아 CRT수상관(20)으로 휘도조절신호를 출력하는 영상증폭회로(18)와, 플라이백 트랜스포머(26)에서 상기 CRT수상관(20)의 애노드로 흐르는 전류의 변화를 검출하여 상기 CRT수상관(20)의 비임전류를 규정값 이하로 제한하도록 된 ABL회로(24)를 구비한 와이드 텔레비전에서, 상기 ABL회로(24)와 상기 플라이백 트랜스포머(26)의 ABL단자의 공통접속점(C)에 설치되어 기설정된 화면모드가 다른 화면비의 화면모드로 절환되면 상기 ABL회로(24)의 출력전압레벨에 변동이 없도록 상기 공통접속점(C)의 전위를 조절하는 ABL전압레벨조절회로부(28)와, 와이드 텔레비전의 전체적인 동작을 제어하면서 기설정된 화면모드가 다른 화면비의 화면모드로 절환되면 상기 ABL전압레벨조절회로부(28)의 동작을 제어하는 마이컴(11)을 더 구비하여 구성된 것이다.To this end, the present invention, the image amplification circuit 18 for receiving the luminance control signal and outputs the luminance control signal to the CRT receiver 20, and the flyback transformer 26 to the anode of the CRT receiver 20 In a wide television having an ABL circuit 24 configured to detect a change in current flowing and limit the beam current of the CRT receiver 20 to a predetermined value or less, the ABL circuit 24 and the flyback transformer 26. The potential of the common connection point C is adjusted so that the output voltage level of the ABL circuit 24 does not change when the preset screen mode is switched to the screen mode of another aspect ratio. The microcomputer 11 for controlling the operation of the ABL voltage level adjusting circuit section 28 when the predetermined screen mode is switched to a screen mode having a different aspect ratio while controlling the overall operation of the wide television set. Equipped with more W is configured.

Description

와이드 텔레비전의 휘도조절장치Brightness Control Device for Wide Television

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

제1도는 일반적인 컬러텔레비전의 휘도조절장치를 설명하기 위한 요부블럭도, 제2도는 본 발명의 일실시예에 따른 와이어 텔레비전의 휘도조절장치를 설명하기 위한 요부블럭도이다.1 is a main block diagram for explaining a brightness control device of a general color television, FIG. 2 is a main block diagram for explaining a brightness control device of a wire television according to an embodiment of the present invention.

Claims (4)

휘도제어신호를 입력받아 CRT수상관(20)으로 휘도조절신호를 출력하는 영상증폭회로(18)와, 플라이백 트랜스포머(26)에서 상기 CRT수상관(20)의 애노드로 흐르는 전류의 변화를 검출하여 상기 CRT수상관(20)의 비임전류를 규정값 이하로 제한하도록 된 ABL회로(24)를 구비한 와이드 텔레비젼에 있어서, 상기 ABL회로(24)와 상기 플라이백 트랜스포머(26)의 ABL단자의 공통접속점(C)에 설치되어 기설정된 화면모드가 다른 화면비의 화면모드로 절환되면 상기 ABL회로(24)와 출력전압레벨에 변동이 없도록 상기 공통접속점(C)의 전위를 조절하는 ABL전압레벨조절회로부(28)와, 와이드 텔레비전의 전체적인 동작을 제어하면서 기설정된 화면모드가 다른 화면비의 화면모드로 절환되면 상기 ABL전압레벨조절회로부(28)의 동작을 제어하는 마이컴(11)을 더 구비하여 구성된 것을 특징으로 하는 와이드 텔레비전의 휘도조절장치.An image amplification circuit 18 which receives a luminance control signal and outputs a luminance control signal to the CRT receiver 20 and detects a change in current flowing from the flyback transformer 26 to the anode of the CRT receiver 20. In a wide television having an ABL circuit 24 configured to limit the beam current of the CRT receiver 20 to a predetermined value or less, the ABL terminal of the ABL circuit 24 and the flyback transformer 26 are connected. ABL voltage level control which adjusts the potential of the common connection point C so that the output voltage level is not changed with the ABL circuit 24 when the preset screen mode installed at the common connection point C is switched to a screen mode having a different aspect ratio. And a microcomputer 11 for controlling the operation of the ABL voltage level control circuit 28 when the preset screen mode is switched to a screen mode having a different aspect ratio while controlling the overall operation of the wide television. Thing A brightness control device for a wide television. 제1항에 있어서, 상기 ABL전압레벨조절회로부(28)는 상기 마이컴(11)의 제어하에 온/오프스위칭 구동하는 스위칭트랜지스터(TR)로 이루어진 것을 특징으로 하는 와이드 텔레비전의 휘도조절장치.The brightness control apparatus of claim 1, wherein the ABL voltage level adjusting circuit section (28) comprises a switching transistor (TR) for driving on / off switching under the control of the microcomputer (11). 제1항에 있어서, 상기 마이컴(11)은 확대화면모드하에서 출력되는 상기 ABL회로(24)의 출력전압레벨을 기준치로 설정한 것을 특징으로 하는 와이드 텔렐비전의 휘도조절장치.2. The brightness control device for wide television according to claim 1, wherein the microcomputer (11) sets the output voltage level of the ABL circuit (24) output in the enlarged picture mode as a reference value. 제1항 또는 제2항에 있어서, 상기 마이컴(11)은 기준화면모드에서 확대화면모드로 절환된 경우에는 상기 스위칭트랜지스터(TR)를 커트오프시키는 반면, 확대화면모드에서 기준화면모드로 절환된 경우에는 상기 스위칭트랜지스터(TR)를 턴온시키면서 화면모드절환에 따른 상기 플라이백 트랜스포머(26)의 ABL단자에서의 비임전류변화량만큼의 전류치를 증가시킴으로써 상기 ABL회로(24)의 출력전압레벨에는 아무런 변동이 없도록 제어하는 것을 특징으로 하는 와이드 텔레비전의 휘도조절장치.The apparatus of claim 1 or 2, wherein the microcomputer 11 cuts off the switching transistor TR when switching from the reference screen mode to the enlarged picture mode, while switching from the enlarged picture mode to the reference picture mode. In this case, the output voltage level of the ABL circuit 24 is not changed by turning on the switching transistor TR while increasing the current value as much as the beam current change amount at the ABL terminal of the flyback transformer 26 according to the screen mode switching. The brightness control device of the wide television, characterized in that there is no control. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950007408A 1995-03-31 1995-03-31 Brightness Control Device for Wide Television KR960036610A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950007408A KR960036610A (en) 1995-03-31 1995-03-31 Brightness Control Device for Wide Television

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KR1019950007408A KR960036610A (en) 1995-03-31 1995-03-31 Brightness Control Device for Wide Television

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KR960036610A true KR960036610A (en) 1996-10-28

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KR1019950007408A KR960036610A (en) 1995-03-31 1995-03-31 Brightness Control Device for Wide Television

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100722035B1 (en) * 2005-05-31 2007-05-25 엘지전자 주식회사 Apparatus and method for adjusting luminance through feedback in television receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100722035B1 (en) * 2005-05-31 2007-05-25 엘지전자 주식회사 Apparatus and method for adjusting luminance through feedback in television receiver

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