JPS54114110A - Facsimile scanning system - Google Patents

Facsimile scanning system

Info

Publication number
JPS54114110A
JPS54114110A JP2262478A JP2262478A JPS54114110A JP S54114110 A JPS54114110 A JP S54114110A JP 2262478 A JP2262478 A JP 2262478A JP 2262478 A JP2262478 A JP 2262478A JP S54114110 A JPS54114110 A JP S54114110A
Authority
JP
Japan
Prior art keywords
circuit
start pulse
sensor
scanning start
generator
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
JP2262478A
Other languages
Japanese (ja)
Inventor
Kazumi Komiya
Yoshio Kishiyu
Giichi Furuya
Akitsugu Yamada
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.)
Nippon Telegraph and Telephone Corp
Panasonic System Solutions Japan Co Ltd
Original Assignee
Matsushita Graphic Communication Systems Inc
Nippon Telegraph and Telephone Corp
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 Matsushita Graphic Communication Systems Inc, Nippon Telegraph and Telephone Corp filed Critical Matsushita Graphic Communication Systems Inc
Priority to JP2262478A priority Critical patent/JPS54114110A/en
Publication of JPS54114110A publication Critical patent/JPS54114110A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent the change of S/N caused by the change of the input light volume supplied to the image sensor and thus to ensure the constant output at all times for the photoelectric conversion circuit of the facsimile device or the like by controlling the generation period of the scanning start pulse for the image sensor.
CONSTITUTION: For the photoelectric conversion circuit in the reading device of the facsimile device or the like using solid state image sensor 1, sensor 1 is driven by the driving clock generated from driving clock generator circuit 2. And the scanning is started by the scanning start pulse generated from scanning start pulse generator circuit 3 which supplies the clock of circuit 2. At the same time, the signal given from sensor 1 is applied to white level detector circuit 6, and the oscillation frequency of generator 6 is controlled by the voltae which is detected by circuit 6 and is corresponding to the output level of sensor 1. And the generation period of the scanning start pulse is controlled for circuit 3 by the output of generator 6.
COPYRIGHT: (C)1979,JPO&Japio
JP2262478A 1978-02-27 1978-02-27 Facsimile scanning system Pending JPS54114110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2262478A JPS54114110A (en) 1978-02-27 1978-02-27 Facsimile scanning system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2262478A JPS54114110A (en) 1978-02-27 1978-02-27 Facsimile scanning system

Publications (1)

Publication Number Publication Date
JPS54114110A true JPS54114110A (en) 1979-09-06

Family

ID=12087975

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2262478A Pending JPS54114110A (en) 1978-02-27 1978-02-27 Facsimile scanning system

Country Status (1)

Country Link
JP (1) JPS54114110A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58170168A (en) * 1982-03-30 1983-10-06 Fujitsu Ltd Driving system of image sensor
JPS59105766A (en) * 1982-12-10 1984-06-19 Fujitsu Ltd Original reader

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51134512A (en) * 1975-05-19 1976-11-22 Hitachi Denshi Ltd Photoelectric conversion scanning circuit of facsimile unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51134512A (en) * 1975-05-19 1976-11-22 Hitachi Denshi Ltd Photoelectric conversion scanning circuit of facsimile unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58170168A (en) * 1982-03-30 1983-10-06 Fujitsu Ltd Driving system of image sensor
JPS59105766A (en) * 1982-12-10 1984-06-19 Fujitsu Ltd Original reader

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