JPS54114110A - Facsimile scanning system - Google Patents
Facsimile scanning systemInfo
- 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
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
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)
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)
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 |
-
1978
- 1978-02-27 JP JP2262478A patent/JPS54114110A/en active Pending
Patent Citations (1)
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)
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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