JPS5480754A - Image quality adjusting circuit - Google Patents

Image quality adjusting circuit

Info

Publication number
JPS5480754A
JPS5480754A JP14896577A JP14896577A JPS5480754A JP S5480754 A JPS5480754 A JP S5480754A JP 14896577 A JP14896577 A JP 14896577A JP 14896577 A JP14896577 A JP 14896577A JP S5480754 A JPS5480754 A JP S5480754A
Authority
JP
Japan
Prior art keywords
video signals
level
image
voltage
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP14896577A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6135754B2 (enrdf_load_stackoverflow
Inventor
Yojiro Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP14896577A priority Critical patent/JPS5480754A/ja
Publication of JPS5480754A publication Critical patent/JPS5480754A/ja
Publication of JPS6135754B2 publication Critical patent/JPS6135754B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Projection-Type Copiers In General (AREA)
  • Television Receiver Circuits (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
JP14896577A 1977-12-12 1977-12-12 Image quality adjusting circuit Granted JPS5480754A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14896577A JPS5480754A (en) 1977-12-12 1977-12-12 Image quality adjusting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14896577A JPS5480754A (en) 1977-12-12 1977-12-12 Image quality adjusting circuit

Publications (2)

Publication Number Publication Date
JPS5480754A true JPS5480754A (en) 1979-06-27
JPS6135754B2 JPS6135754B2 (enrdf_load_stackoverflow) 1986-08-14

Family

ID=15464615

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14896577A Granted JPS5480754A (en) 1977-12-12 1977-12-12 Image quality adjusting circuit

Country Status (1)

Country Link
JP (1) JPS5480754A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6230478A (ja) * 1985-08-01 1987-02-09 Agency Of Ind Science & Technol 濃度階調変換方式
JPS6230480A (ja) * 1985-08-01 1987-02-09 Agency Of Ind Science & Technol コントラスト自動変換方式
US5299008A (en) * 1991-02-28 1994-03-29 Matsushita Electric Industrial Co., Ltd. Video tone correction control circuit
US5307166A (en) * 1992-01-14 1994-04-26 Matsushita Electric Industrial Co., Ltd. Automatic image-tone control circuit and method for controlling brightness of image
US5391944A (en) * 1992-01-22 1995-02-21 Matsushita Electric Industrial Co., Ltd. Image-tone control circuit and gradient adjusting circuit therefor
KR100439544B1 (ko) * 2002-03-25 2004-07-12 엘지전자 주식회사 영상신호의 특성조정장치

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5136194A (enrdf_load_stackoverflow) * 1974-09-20 1976-03-26 Sanyo Jido Hanbaiki Kk

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5136194A (enrdf_load_stackoverflow) * 1974-09-20 1976-03-26 Sanyo Jido Hanbaiki Kk

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6230478A (ja) * 1985-08-01 1987-02-09 Agency Of Ind Science & Technol 濃度階調変換方式
JPS6230480A (ja) * 1985-08-01 1987-02-09 Agency Of Ind Science & Technol コントラスト自動変換方式
US5299008A (en) * 1991-02-28 1994-03-29 Matsushita Electric Industrial Co., Ltd. Video tone correction control circuit
US5307166A (en) * 1992-01-14 1994-04-26 Matsushita Electric Industrial Co., Ltd. Automatic image-tone control circuit and method for controlling brightness of image
US5391944A (en) * 1992-01-22 1995-02-21 Matsushita Electric Industrial Co., Ltd. Image-tone control circuit and gradient adjusting circuit therefor
KR100439544B1 (ko) * 2002-03-25 2004-07-12 엘지전자 주식회사 영상신호의 특성조정장치

Also Published As

Publication number Publication date
JPS6135754B2 (enrdf_load_stackoverflow) 1986-08-14

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