KR100262366B1 - 비디오입력레벨자동선택회로 - Google Patents
비디오입력레벨자동선택회로 Download PDFInfo
- Publication number
- KR100262366B1 KR100262366B1 KR1019970031282A KR19970031282A KR100262366B1 KR 100262366 B1 KR100262366 B1 KR 100262366B1 KR 1019970031282 A KR1019970031282 A KR 1019970031282A KR 19970031282 A KR19970031282 A KR 19970031282A KR 100262366 B1 KR100262366 B1 KR 100262366B1
- Authority
- KR
- South Korea
- Prior art keywords
- level
- signal
- video
- input
- output
- Prior art date
Links
- 238000012545 processing Methods 0.000 claims description 3
- 238000012937 correction Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Controls And Circuits For Display Device (AREA)
- Television Receiver Circuits (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
Description
Claims (2)
- 피씨(PC)로부터 입력되는 비디오신호를 R.G.B신호로 처리하는 비디오신호출력부(16)와, 상기 비디오신호출력부(16)에 의해 처리되어 출력되는 R.G.B신호를 증폭하여 출력시키는 전치증폭기(17)와, 상기 전치증폭기(17)에 의해 증폭 출력된R.G.B신호를 디스플레이시키도록 화면부(19)에 출력시키는 영상출력부(18)로 이루어진 영상표시기기에 있어서,PC로부터 입력되는 비디오신호의 입력레벨을 자동으로 선택하도록 상기 비디오신호출력부(16)에 의해 처리되어 출력되는 R.G.B신호를 기준전압과 비교하는 신호비교부(20)와, 상기 신호비교부(20)에 의해 비교 출력되는 R.G.B신호의 레벨을 판별하는 레벨판별부(30)와, 상기 레벨판별부(30)에 의해 판별된 R.G.B신호의 입력이득레벨을 조정하는 레벨제어부(40)와, 상기 레벨제어부(40)에 의해 조정된 입력이득레벨에 따라 화면부(19)에 디스플레이되는 R.G.B신호의 콘트라스트를 조정하도록 전치증폭기(17)에 자동 가변되는 콘트라스트 전위를 출력하는 콘트라스트조정부(50)로 구성된 것을 특징으로 하는 비디오 입력레벨 자동 선택 회로.
- 제 1항에 있어서, 상기 신호비교부(20)는, 비디오신호출력부(16)에서 출력하는 R신호를 저항(R11)(R12)에 의해 분압된 기준전압(Vref1)과 비교하여 레벨판별부(30)에 출력시키는 제 1 비교기(21)와, G신호를 저항(R13)(14)에 의해 분압된 기준전압(Vref2)과 비교하여 레벨판별부(30)에 출력시키는 제 2 비교기(22)와, B신호를 저항(R15)(R16)에 의해 분압된 기준전압(Vref3)과 비교하여 레벨판별부(30)에 출력시키는 제 3 비교기(23)를 포함하여 구성된 것을 특징으로 하는 비디오 입력레벨 자동 선택 회로.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019970031282A KR100262366B1 (ko) | 1997-07-07 | 1997-07-07 | 비디오입력레벨자동선택회로 |
GB9912188A GB2335562B (en) | 1996-12-30 | 1997-12-29 | Video input level control circuit in a video appliance |
GB9727412A GB2321155B (en) | 1996-12-30 | 1997-12-29 | Video input level control circuit in a video appliance |
BRPI9706530-7A BR9706530B1 (pt) | 1996-12-30 | 1997-12-30 | circuito de controle do nìvel de entrada de vìdeo em um aparelho de exibição de vìdeo. |
CN97126155A CN1092897C (zh) | 1996-12-30 | 1997-12-30 | 视频设备中的视频输入电平控制电路 |
US09/000,821 US6191760B1 (en) | 1996-12-30 | 1997-12-30 | Video input level control circuit in a video appliance |
IDP980040A ID21385A (id) | 1997-07-07 | 1998-01-15 | Rangkaian kontrol level input video dalam suatu alat-alat video |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019970031282A KR100262366B1 (ko) | 1997-07-07 | 1997-07-07 | 비디오입력레벨자동선택회로 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR19990009025A KR19990009025A (ko) | 1999-02-05 |
KR100262366B1 true KR100262366B1 (ko) | 2000-08-01 |
Family
ID=19513556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019970031282A KR100262366B1 (ko) | 1996-12-30 | 1997-07-07 | 비디오입력레벨자동선택회로 |
Country Status (2)
Country | Link |
---|---|
KR (1) | KR100262366B1 (ko) |
ID (1) | ID21385A (ko) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100947221B1 (ko) * | 2002-07-26 | 2010-03-11 | 엘지전자 주식회사 | 모니터의 자동 색상 조정장치 및 방법 |
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1997
- 1997-07-07 KR KR1019970031282A patent/KR100262366B1/ko not_active IP Right Cessation
-
1998
- 1998-01-15 ID IDP980040A patent/ID21385A/id unknown
Also Published As
Publication number | Publication date |
---|---|
KR19990009025A (ko) | 1999-02-05 |
ID21385A (id) | 1999-06-03 |
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