KR970012272A - Automatic current control circuit and its control method - Google Patents

Automatic current control circuit and its control method Download PDF

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Publication number
KR970012272A
KR970012272A KR1019950026841A KR19950026841A KR970012272A KR 970012272 A KR970012272 A KR 970012272A KR 1019950026841 A KR1019950026841 A KR 1019950026841A KR 19950026841 A KR19950026841 A KR 19950026841A KR 970012272 A KR970012272 A KR 970012272A
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KR
South Korea
Prior art keywords
output
signal
current
current amount
amount
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KR1019950026841A
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Korean (ko)
Inventor
김웅영
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배순훈
대우전자 주식회사
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Priority to KR1019950026841A priority Critical patent/KR970012272A/en
Publication of KR970012272A publication Critical patent/KR970012272A/en

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Abstract

본 발명은 모니터에 관한 것으로서 특히 고압 트랜스포머에서 출력되는 전류량을 마이크로프로세서를 통해 자동으로 조정함으로써 화면밝기(Brightness)를 정밀하게 조정할 수 있는 자동전류 제어장치 및 그 제어방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitor, and more particularly, to an automatic current control device and a control method thereof, by which a brightness of a screen can be precisely adjusted by automatically adjusting an amount of current output from a high voltage transformer through a microprocessor.

이와 같은 본 발명의 전류제어회로가 고압 트랜스포머의 출력신호를 받아 그 출력신호에 따라 화면 밝기를 조정하기 위한 전류량을 결정하는 마이크로프로세서와, 상기 마이크로프로세서의 출력신호를 처리하여 프리앰프에 인가시키는 신호출력부로 구비되어 이루어진 것이다.The current control circuit of the present invention receives the output signal of the high-voltage transformer and determines the amount of current to adjust the screen brightness according to the output signal, and a signal for processing and applying the output signal of the microprocessor to the preamplifier It is made of an output unit.

Description

자동전류 제어회로 및 그 제어방법Automatic current control circuit and its control method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명에 따른 자동전류 제어회로의 구성을 보인 도면,3 is a view showing the configuration of an automatic current control circuit according to the present invention;

제4도는 제3도의 전류제어회로의 상세회로도,4 is a detailed circuit diagram of the current control circuit of FIG.

제5도는 본 발명에 따른 자동전류 제어방법을 보인 도면.5 is a view showing an automatic current control method according to the present invention.

Claims (4)

전류제어회로(10)에 의해 고압 트랜스포머(FBT)의 출력신호의 전류량을 제어한 후 프리앰프(PA)에 인가하여 화면 밝기를 조정하는 화면밝기 조정회로에 있어서 상기 전류제어회로(10)가 고압 트랜스포머(FBT)의 출력신호를 받아 그 츨력신호에 따라 화면밝기를 조정하기 위한 전류량을 결정하는 마이크로프로세서(11)와 상기 마이크로프로세서(11)의 출력신호를 처리하여 프리앰프(PA)에 인가시키는 제1 및 제2신호출력부(12)(13)로 구비됨을 특징으로 하는 자동전류 제어회로.In the screen brightness adjustment circuit for controlling the current amount of the output signal of the high-voltage transformer (FBT) by the current control circuit 10 and then applied to the preamplifier (PA) to adjust the screen brightness, the current control circuit 10 is a high voltage The microprocessor 11 which receives the output signal of the transformer FBT and determines the amount of current for adjusting the screen brightness according to the output signal and processes the output signal of the microprocessor 11 and applies it to the preamplifier PA. Automatic current control circuit, characterized in that the first and second signal output unit (12, 13) provided. 제1항에 있어서 상기 제1신호출력부(12)는 마이크로프로세서(11)의 출력신호(CL1)를 바이어스시키는 저항(R2)과, 상기 저항(R2)의 출력신호에 따라 스위칭하는 트랜지스터(Q1)와, 상기 트랜지스터(Q1)의 출력전류를 제어하여 화면 밝기를 조정하는 저항(R3)(R4) 및 가변저항(VR1)(VR2)으로 구비됨을 특징으로 하는 자동전류 제어회로.2. The transistor of claim 1, wherein the first signal output unit 12 switches the resistor R2 for biasing the output signal CL1 of the microprocessor 11 and the output signal of the resistor R2. And a resistor (R3) (R4) and a variable resistor (VR1) (VR2) for adjusting the screen brightness by controlling the output current of the transistor (Q1). 제1항에 있어서 상기 제2신호출력부(13)는 키입력수단(KEY)을 통해 조정하고자 하는 화면밝기에 대응되는 전류량을 출력하는 마이크로프로세서(11)의 출력신호(CL2)를 바이어스시키는 저항(R5)과 상기 저항(R5)의 출력신호에 따라 스위칭하는 트랜지스터(Q2)로 구비됨을 특징으로 하는 자동전류 제어회로.The resistor of claim 1, wherein the second signal output unit 13 biases the output signal CL2 of the microprocessor 11 that outputs a current amount corresponding to the screen brightness to be adjusted through a key input means KEY. (R5) and a transistor (Q2) for switching in accordance with the output signal of the resistor (R5). 고압 트랜스포머(FBT)의 출력시호를 디지털 신호로 변환시키는 제1스텝(S1)과, 상기 제1스템(S1)에 의해 변환된 디지털 신호에 대응되는 전류량과 현재 출력중인 전류량을 비교하는 제2스텝(S2)과, 상기 제2스텝(S2)에 의해 디지털 신호에 대응되는 전류량과 현재 출력중인 전류량보다 크면, 현재 출력중인 전류량보다 큰 값의 전류량을 출력하는 제3스텝(S3)과, 상기 제2스텝(S2)에 의해 변환된 디지털 신호에 대응되는 전류량이 출력중인 전류량보다 작으면, 현재 출력중인 전류량보다 작은 값의 전류량을 출력하는 제4스텝(S4)과, 상기 제3스텝(S3) 및 제4스텝(S4)의 전류량을 아날로그 신호로 변환하여 마이크로프로세서(11)에서 출력시키는 제5스텝(S5)과, 키입력수단(KEY)를 통해 선택된 화면밝기신호가 입력됨을 감지하는 제6스텝(S6)과, 상기 제6스텝(S6)에 의해 입력된 화면밝기신호에 대응되는 전류량을 결정한 후 제5스텝(S7)에 인가하여 아날로그 신호로 변환시키는 제7스텝(S7)순으로 이루어짐을 특징으로 하는 자동전류 제어방법.A first step S1 for converting the output time of the high voltage transformer FBT into a digital signal, and a second step for comparing the current amount corresponding to the digital signal converted by the first system S1 with the amount of current being output. (S2) and, if the current amount corresponding to the digital signal and the current amount being output by the second step S2 are greater than the current amount being output, the third step S3 outputting a current amount larger than the current amount being output, and the third step. If the current amount corresponding to the digital signal converted by the two steps S2 is smaller than the current amount being output, the fourth step S4 outputs a current amount smaller than the current amount being output, and the third step S3. And a fifth step S5 for converting the current amount of the fourth step S4 into an analog signal and outputting the analog signal to the microprocessor 11, and the sixth step of detecting that the selected screen brightness signal is input through the key input means KEY. Step S6 and the sixth step S6 enter the An automatic current control method of claim 7, characterized by constituted by any step (S7) in order to display after determining the amount of current corresponding to the brightness signal applied to the fifth step (S7) are converted into an analog signal. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950026841A 1995-08-28 1995-08-28 Automatic current control circuit and its control method KR970012272A (en)

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KR1019950026841A KR970012272A (en) 1995-08-28 1995-08-28 Automatic current control circuit and its control method

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KR1019950026841A KR970012272A (en) 1995-08-28 1995-08-28 Automatic current control circuit and its control method

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010010979A (en) * 1999-07-24 2001-02-15 김영환 Automatic brightness limits circuit in a monitor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010010979A (en) * 1999-07-24 2001-02-15 김영환 Automatic brightness limits circuit in a monitor

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