KR960028328A - Luminance mute circuit of multi-synchronous monitor - Google Patents
Luminance mute circuit of multi-synchronous monitor Download PDFInfo
- Publication number
- KR960028328A KR960028328A KR1019940040262A KR19940040262A KR960028328A KR 960028328 A KR960028328 A KR 960028328A KR 1019940040262 A KR1019940040262 A KR 1019940040262A KR 19940040262 A KR19940040262 A KR 19940040262A KR 960028328 A KR960028328 A KR 960028328A
- Authority
- KR
- South Korea
- Prior art keywords
- voltage
- crt
- microprocessor
- pulse width
- output
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/57—Control of contrast or brightness
- H04N5/59—Control of contrast or brightness in dependence upon beam current of cathode ray tube
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/42—Flyback transformers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
- H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
- H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
- H04N3/18—Generation of supply voltages, in combination with electron beam deflecting
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2615—Audio, video, tv, consumer electronics device
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Receiver Circuits (AREA)
Abstract
본 발명은 멀티 동기 모니터에 관한 것으로, 특히 멀티 동기 모니터의 모드 변환시 가변되는 브라운관의 그리드 전압을 뮤트시킴으로써, 모니터의 화면에 나타나는 백 래스터(Back Raster)를 보이지 않게 하기 위하여, 수평출력 트랜지스터가 동작을 함으로써 전자 빔을 수평방향으로 주사시키기 위한 톱니파를 발생시키고, 플라이백 트랜스포머의 2차측에서 나오는 전압을 정류하고 평활하여 출력된 전압을 분배함으로써 브라운관(CRT)의 그리드로 입력시키는 음전압 발생수단과, 컴퓨터로부터 입력되는 수직 동기신호 및 수평 동기신호의 유무를 판단하여 설정된 모드에 따른 펄스폭 변조신호를 출력시키는 마이크로 프로세서, 상기 마이크로 프로세서에서 출력되는 펄스폭 변조신호에 의해 상기 음전압 발생수단에서 발생된 브라운관(CRT)의 그리드 전압을 가변시켜 휘도를 제어하는 휘도 제어수단 및 상기 마이크로 프로세서로부터 출력되는 펄스폭 변조신호의 모드 전환시 상기 휘도 제어수단의 출력 전압을 뮤트시키는 뮤트 회로 수단으로 구성한 멀티 동기 모니터의 휘도 뮤트 회로를 제공한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a multi-synchronous monitor. In particular, the horizontal output transistor is operated to mute the grid voltage of the CRT that is varied during mode switching of the multi-synchronous monitor so that the back raster shown on the screen of the monitor is not shown. Negative voltage generating means for generating a sawtooth wave for scanning the electron beam in a horizontal direction, rectifying the voltage coming from the secondary side of the flyback transformer, and smoothing and distributing the output voltage to the grid of the CRT; The microprocessor generates a pulse width modulated signal according to a set mode by determining the presence of a vertical synchronizing signal and a horizontal synchronizing signal input from a computer, and the negative voltage generating means generates the pulse width modulated signal output from the microprocessor. Grid voltage of CRT A luminance mute circuit of a multi-synchronous monitor comprising a luminance control means for varying the brightness and controlling the luminance and a mute circuit means for muting the output voltage of the luminance control means when switching the mode of the pulse width modulated signal output from the microprocessor. .
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제1도는 종래 멀티 동기 모니터의 휘도 가변회로도, 제2도는 본 발명에 의한 멀티 동기 모니터의 휘도 뮤트 회로도이다.1 is a luminance variable circuit diagram of a conventional multi-synchronous monitor, and FIG. 2 is a luminance mute circuit diagram of a multi-synchronous monitor according to the present invention.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019940040262A KR0151605B1 (en) | 1994-12-31 | 1994-12-31 | Luminance mute circuit of multi-sync. monitor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019940040262A KR0151605B1 (en) | 1994-12-31 | 1994-12-31 | Luminance mute circuit of multi-sync. monitor |
Publications (2)
Publication Number | Publication Date |
---|---|
KR960028328A true KR960028328A (en) | 1996-07-22 |
KR0151605B1 KR0151605B1 (en) | 1998-10-15 |
Family
ID=19406064
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019940040262A KR0151605B1 (en) | 1994-12-31 | 1994-12-31 | Luminance mute circuit of multi-sync. monitor |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR0151605B1 (en) |
-
1994
- 1994-12-31 KR KR1019940040262A patent/KR0151605B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR0151605B1 (en) | 1998-10-15 |
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Legal Events
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A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
LAPS | Lapse due to unpaid annual fee |