KR950033794A - Monitor brightness control circuit - Google Patents

Monitor brightness control circuit Download PDF

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Publication number
KR950033794A
KR950033794A KR1019940011892A KR19940011892A KR950033794A KR 950033794 A KR950033794 A KR 950033794A KR 1019940011892 A KR1019940011892 A KR 1019940011892A KR 19940011892 A KR19940011892 A KR 19940011892A KR 950033794 A KR950033794 A KR 950033794A
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KR
South Korea
Prior art keywords
current
voltage
monitor
output
resistor
Prior art date
Application number
KR1019940011892A
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Korean (ko)
Other versions
KR970004610B1 (en
Inventor
조희철
Original Assignee
배순훈
대우전자 주식회사
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Application filed by 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019940011892A priority Critical patent/KR970004610B1/en
Publication of KR950033794A publication Critical patent/KR950033794A/en
Application granted granted Critical
Publication of KR970004610B1 publication Critical patent/KR970004610B1/en

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Television Receiver Circuits (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

본 발명은 모니터에 관한 것으로서, 특히 디지탈 방식으로 화면의 밝기를 조정하여 낮은 전압으로도 화면의 밝기를 조절할 수 있는 모니터의 밝기 조절회로가 개시되어 있다. 상기 모니터의 밝기 조정장치는 화면의 밝기를 조절하기 위하여 마이크로 프로세서에서 가변되어 PWM 신호를 정류하여 가변 전압을 발생시키는 가변 전압 발생부와, 상기 가변 전압 발생부에서 출력되는 전압을 전류로 변환시켜 그 전류의 크기를 제어하는 전류 제어부와, 상기 전류 제어부에서 출력되는 전류에 의해 입력되는 전압을 분배시켜 모니터로 출력시키는 분배부로 구성된다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitor. In particular, a brightness control circuit of a monitor capable of adjusting the brightness of a screen even at a low voltage by adjusting the brightness of a screen in a digital manner is disclosed. The brightness adjusting device of the monitor is a variable voltage generator that is variable in the microprocessor to rectify the PWM signal to generate a variable voltage to adjust the brightness of the screen, and converts the voltage output from the variable voltage generator into a current. A current control unit for controlling the magnitude of the current, and a distribution unit for distributing the voltage input by the current output from the current control unit to output to the monitor.

Description

모니터의 화면 밝기 조절 회로Monitor brightness control circuit

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

제2도는 본 발명에 따른 모니터의 화면 밝기 조절 회로도.2 is a circuit diagram of the screen brightness adjustment of the monitor according to the invention.

Claims (5)

화면의 밝기를 조절하기 위하여 마이크로프로세서에서 출력되는 전압을 정류시키고, 정류된 전압을 발생시키는 가변전압 발생수단과, 상기 가변 전압 발생수단에서 출력되는 전압을 전류로 변환시키고, 상기 전류의 크기를 제어하는 전류제어 수단과, 상기 전류제어 수단에서 출력되는 전류에 의해 입력되는 전압을 분배시켜 모니터로 출력시키는 분배수단으로 구성됨을 특징으로 하는 모니터의 화면 밝기 조절회로.In order to adjust the brightness of the screen to rectify the voltage output from the microprocessor, the variable voltage generating means for generating the rectified voltage, converts the voltage output from the variable voltage generating means into a current, and controls the magnitude of the current And current distribution means for distributing a voltage inputted by the current output from the current control means and distributing the voltage to the monitor. 제1항에 있어서, 상기 전류제어 수단의 입력측에 연결되고 마이크로 프로세서에서 출력되는 제어 신호에 의해 전류 제어부에 입력되는 전압을 뮤트시킴으로써 전원 온시 또는 모드 변환시 모니터에 인가되는 전압을 최소로 변환시키는 뮤트수단을 더 포함하는 것을 특징으로 하는 모니터의 화면 밝기 조절회로.The method of claim 1, wherein the mute means connected to the input side of the current control means and mute the voltage input to the current controller by a control signal output from the microprocessor to minimize the voltage applied to the monitor at power-on or mode conversion Screen brightness control circuit of the monitor, characterized in that it further comprises. 제2항에 있어서, 상기 뮤트 수단은 전원 온시 또는 변환시 마이크로 프로세서에 출력되는 제어신호를 바이어스시키는 저항과, 상기 저항에서 출력되는 전압에 의해 상기 전류 제어부의 트랜지스터의 베이스측에 인가되는 전압이 최대치가 되도록 하는 트랜지스터로 구성됨을 특징으로 하는 모니터의 화면 밝기 조절회로.3. The mute means according to claim 2, wherein the mute means has a maximum value of a voltage applied to the base side of the transistor of the current control unit by a resistor biasing a control signal output to the microprocessor upon power-on or conversion and a voltage output from the resistor. Screen brightness control circuit of the monitor, characterized in that consisting of a transistor. 제1항에 있어서, 상기 전류 제어수단은 상기 가변 전압 발생수단에서 출력되는 전압을 바이어스 시키는 저항과, 입력되는 정전압을 바이어스시키는 저항과, 상기 저항에 의해 결정되는 베이스측의 전압 및 전류 증폭률에 의해 출력되는 전류의 크기가 결정되는 트랜지스터와, 상기 트랜지스터의 전류 부담을 줄여주기 위한 저항으로 구성됨을 특징으로 하는 모니터의 화면 밝기 조절회로.2. The current control means according to claim 1, wherein the current control means comprises a resistor for biasing the voltage output from the variable voltage generating means, a resistor for biasing the input constant voltage, and a voltage and current amplification factor of the base side determined by the resistance. And a transistor configured to determine the magnitude of the output current, and a resistor for reducing the current burden of the transistor. 제4항에 있어서, 상기 전류 제어 수단의 트랜지스터는 PNP형인 것을 특징으로 하는 모니터의 화면 밝기 조절회로.5. The screen brightness adjusting circuit of a monitor according to claim 4, wherein the transistor of the current control means is a PNP type. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940011892A 1994-05-30 1994-05-30 A circuit for the brightness-control at a monitor KR970004610B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940011892A KR970004610B1 (en) 1994-05-30 1994-05-30 A circuit for the brightness-control at a monitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940011892A KR970004610B1 (en) 1994-05-30 1994-05-30 A circuit for the brightness-control at a monitor

Publications (2)

Publication Number Publication Date
KR950033794A true KR950033794A (en) 1995-12-26
KR970004610B1 KR970004610B1 (en) 1997-03-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940011892A KR970004610B1 (en) 1994-05-30 1994-05-30 A circuit for the brightness-control at a monitor

Country Status (1)

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Also Published As

Publication number Publication date
KR970004610B1 (en) 1997-03-29

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