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JPS5637776A - Level detection/elimination system for dark current signal of solid state image pickup element - Google Patents

Level detection/elimination system for dark current signal of solid state image pickup element

Info

Publication number
JPS5637776A
JPS5637776A JP11399979A JP11399979A JPS5637776A JP S5637776 A JPS5637776 A JP S5637776A JP 11399979 A JP11399979 A JP 11399979A JP 11399979 A JP11399979 A JP 11399979A JP S5637776 A JPS5637776 A JP S5637776A
Authority
JP
Japan
Prior art keywords
dark current
image pickup
solid state
state image
electric charge
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.)
Pending
Application number
JP11399979A
Other languages
Japanese (ja)
Inventor
Tokuichi Tsunekawa
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP11399979A priority Critical patent/JPS5637776A/en
Publication of JPS5637776A publication Critical patent/JPS5637776A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
    • H04N25/63—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to dark current

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
  • Facsimile Heads (AREA)

Abstract

PURPOSE:To ensure a detection for the dark current of the solid state image pickup element, by selecting the output signal of the 1st photoelectric converting element having a light receiving screen which is masked partially and the output signal of the 2nd photoelectric converting element having a different masking area from the 1st element and then carrying out an operation. CONSTITUTION:The photoelectric converting parts S1-Sn of the solid state image pickup element are set to the same area, and the elements S1 and S2 have a partial masking of light each. Among the electric charge converted at the photoelectric converting part, the electric charge produced by the exposure are CS1-CSn, and the electric charge by the dark current are CD1- CDn each. The voltage caused by the above charge CS1-CSn plus CD1-CDn which are read out through the shift register are referred to as VC1-VCn and VD1-VDn respectively, and the reference voltage is defined as VK respectively. The electric charge caused by the dark current is equal at each converting part to obtain VD1=VD2=VD, and X=VC2/VC1 is obtained, where X is the ratio of the exposed parts between the parts S1 and S2. As a result, the dark current signal level VD becomes as shown in the equation (A), and thus the dark current signal level can be detected from the output voltage given from the parts S1 and S2 plus X.
JP11399979A 1979-09-05 1979-09-05 Level detection/elimination system for dark current signal of solid state image pickup element Pending JPS5637776A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11399979A JPS5637776A (en) 1979-09-05 1979-09-05 Level detection/elimination system for dark current signal of solid state image pickup element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11399979A JPS5637776A (en) 1979-09-05 1979-09-05 Level detection/elimination system for dark current signal of solid state image pickup element

Publications (1)

Publication Number Publication Date
JPS5637776A true JPS5637776A (en) 1981-04-11

Family

ID=14626520

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11399979A Pending JPS5637776A (en) 1979-09-05 1979-09-05 Level detection/elimination system for dark current signal of solid state image pickup element

Country Status (1)

Country Link
JP (1) JPS5637776A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5868376A (en) * 1981-10-16 1983-04-23 Sanyo Electric Co Ltd Solid-state image pickup device
JPS61182377A (en) * 1985-02-08 1986-08-15 Canon Inc Image pickup device
US5105276A (en) * 1990-11-15 1992-04-14 Eastman Kodak Company DC restoration of sampled imagery signals
US8597707B2 (en) 2009-12-22 2013-12-03 Nissin Foods Holdings Co., Ltd. Instant noodles and method for producing the same
US8968813B2 (en) 2010-03-19 2015-03-03 Nissin Foods Holdings Co., Ltd. Instant noodles and method for producing the same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5868376A (en) * 1981-10-16 1983-04-23 Sanyo Electric Co Ltd Solid-state image pickup device
JPH0449312B2 (en) * 1981-10-16 1992-08-11 Sanyo Electric Co
JPS61182377A (en) * 1985-02-08 1986-08-15 Canon Inc Image pickup device
US5105276A (en) * 1990-11-15 1992-04-14 Eastman Kodak Company DC restoration of sampled imagery signals
US8597707B2 (en) 2009-12-22 2013-12-03 Nissin Foods Holdings Co., Ltd. Instant noodles and method for producing the same
US8968813B2 (en) 2010-03-19 2015-03-03 Nissin Foods Holdings Co., Ltd. Instant noodles and method for producing the same

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