KR920004117Y1 - 비디오 카메라에 있어서 화면의 셰이딩 보정회로 - Google Patents
비디오 카메라에 있어서 화면의 셰이딩 보정회로 Download PDFInfo
- Publication number
- KR920004117Y1 KR920004117Y1 KR2019890014824U KR890014824U KR920004117Y1 KR 920004117 Y1 KR920004117 Y1 KR 920004117Y1 KR 2019890014824 U KR2019890014824 U KR 2019890014824U KR 890014824 U KR890014824 U KR 890014824U KR 920004117 Y1 KR920004117 Y1 KR 920004117Y1
- Authority
- KR
- South Korea
- Prior art keywords
- signal
- screen
- correction
- circuit
- shading
- Prior art date
Links
- 238000003705 background correction Methods 0.000 title claims description 14
- 230000002194 synthesizing effect Effects 0.000 claims description 15
- 230000003321 amplification Effects 0.000 claims description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 11
- 238000003384 imaging method Methods 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000003786 synthesis reaction Methods 0.000 claims 1
- 239000003990 capacitor Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012887 quadratic function Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/16—Circuitry for reinsertion of DC and slowly varying components of signal; Circuitry for preservation of black or white level
- H04N5/18—Circuitry for reinsertion of DC and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Picture Signal Circuits (AREA)
Abstract
Description
Claims (1)
- 동기발생부, 촬상관 및 클램핑펄스 발생부를 구비한 비디오 카메라에 있어서, 화면 전체의 셰이딩보정 조절량을 결정하기 위하여 상기 동기발생부로 부터 공급되는 동기신호에 의해 톱니파신호를 발생하는 톱니파 발생회로(11)와 상기 톱니파신호를 반전시킨 반전신호를 발생하는 반전회로(12)와 상기 톱니파발생회로(11)와 상기 반전회로(12)의 출력신호를 입력받아 이들 신호의 차전압을 분압하는 가변저항(VR1)을 구비하여 분압된 제1화면 보정신호를 출력하기 위한 보정량 결정수단(10); 상기 동기발생부로 부터 공급되는 동기신호를 미분하는 미분수단과 상기 미분수단에 의하여 미분된 신호중 부의 미분파형만을 검출하는 연산증폭기(A1)와 상기 연산증폭기의 출력을 일정비율에 의하여 각각 증폭하는 병렬접속된 증폭수단 및 상기 증폭수단들에 의하여 출력된 신호들의 차전압을 분압하는 가변저항을 구비하여 분압된 제2화면 보정신호를 출력하기 위한 제2보정량 결정수단(20); 상기 제1보정량 결정수단(10)으로 부터의 제1화면 보정용신호의 전압과 상기 제2보정량 결정수단으로 부터의 제2화면 보정용신호의 전압을 합산하여 합성된 화면보정용신호를 출력하기 위한 보정량 합성수단(30); 상기 보정량 합성수단(30)의 출력과 상기 클램핑 펄스발생부로 부터 공급되는 클램핑 펄스를 상기 촬상관쪽으로 부터 인입되는 비디오신호와 혼합증폭하여 비디오신호의 셰이딩현상을 보정하는 혼합증폭수단(40)을 포함하는 것을 특징으로 하는 화면의 셰이딩 보정회로.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019890014824U KR920004117Y1 (ko) | 1989-10-12 | 1989-10-12 | 비디오 카메라에 있어서 화면의 셰이딩 보정회로 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019890014824U KR920004117Y1 (ko) | 1989-10-12 | 1989-10-12 | 비디오 카메라에 있어서 화면의 셰이딩 보정회로 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR910008245U KR910008245U (ko) | 1991-05-31 |
KR920004117Y1 true KR920004117Y1 (ko) | 1992-06-20 |
Family
ID=19290712
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR2019890014824U KR920004117Y1 (ko) | 1989-10-12 | 1989-10-12 | 비디오 카메라에 있어서 화면의 셰이딩 보정회로 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR920004117Y1 (ko) |
-
1989
- 1989-10-12 KR KR2019890014824U patent/KR920004117Y1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR910008245U (ko) | 1991-05-31 |
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