JPS5566064A - Original reader - Google Patents
Original readerInfo
- Publication number
- JPS5566064A JPS5566064A JP14002878A JP14002878A JPS5566064A JP S5566064 A JPS5566064 A JP S5566064A JP 14002878 A JP14002878 A JP 14002878A JP 14002878 A JP14002878 A JP 14002878A JP S5566064 A JPS5566064 A JP S5566064A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- lamp
- light quantity
- original
- speed
- 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
Links
Landscapes
- Character Input (AREA)
- Image Input (AREA)
Abstract
PURPOSE: To read an original well by changing the light quantity of the lamp, which irradiates the original surface, by speed signals obtained by differentiating timing signals at a sub-scanning time and eliminating the fluctuation of the image sensor output level dependent upon the fluctuation of a photoelectric conversion time.
CONSTITUTION: Timing signal a is amplified by 21 and is subjected to time differentiating circuit 22 to output differentiated signal b having the amplitude according the speed and the phase advanced by 90°, and signal c obtained by rectifying signal b by 23 is supplied to amplification driving circuit 24 for lamp, thereby changing the light quantity of lamp 12. As a result, the same light quantity product is given to CCD image sensor 14 even if the movement speed for sub-scanning is changed, so that an original can be read well.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14002878A JPS5566064A (en) | 1978-11-14 | 1978-11-14 | Original reader |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14002878A JPS5566064A (en) | 1978-11-14 | 1978-11-14 | Original reader |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5566064A true JPS5566064A (en) | 1980-05-19 |
JPS6122348B2 JPS6122348B2 (en) | 1986-05-31 |
Family
ID=15259266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14002878A Granted JPS5566064A (en) | 1978-11-14 | 1978-11-14 | Original reader |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5566064A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57170116U (en) * | 1981-04-17 | 1982-10-26 | ||
JPS60254283A (en) * | 1984-05-30 | 1985-12-14 | Tokyo Erekutoron Kk | Pattern reader |
JPS6152781A (en) * | 1984-08-23 | 1986-03-15 | Sumitomo Electric Ind Ltd | Light quantity control type optical character reader |
JPS6162981A (en) * | 1984-09-05 | 1986-03-31 | Sumitomo Electric Ind Ltd | Optical character reader of light quantity control type |
-
1978
- 1978-11-14 JP JP14002878A patent/JPS5566064A/en active Granted
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57170116U (en) * | 1981-04-17 | 1982-10-26 | ||
JPS60254283A (en) * | 1984-05-30 | 1985-12-14 | Tokyo Erekutoron Kk | Pattern reader |
JPH0521272B2 (en) * | 1984-05-30 | 1993-03-23 | Tokyo Electron Ltd | |
JPS6152781A (en) * | 1984-08-23 | 1986-03-15 | Sumitomo Electric Ind Ltd | Light quantity control type optical character reader |
JPS6162981A (en) * | 1984-09-05 | 1986-03-31 | Sumitomo Electric Ind Ltd | Optical character reader of light quantity control type |
Also Published As
Publication number | Publication date |
---|---|
JPS6122348B2 (en) | 1986-05-31 |
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