JPS57127360A - Reader of picture information - Google Patents
Reader of picture informationInfo
- Publication number
- JPS57127360A JPS57127360A JP56012433A JP1243381A JPS57127360A JP S57127360 A JPS57127360 A JP S57127360A JP 56012433 A JP56012433 A JP 56012433A JP 1243381 A JP1243381 A JP 1243381A JP S57127360 A JPS57127360 A JP S57127360A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- circuit
- light source
- prescribed
- secondary scanning
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/40056—Circuits for driving or energising particular reading heads or original illumination means
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Image Input (AREA)
- Facsimile Scanning Arrangements (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
PURPOSE:To increase the image resolution in the secondary scanning direction during the reading of picture information, by giving a prescribed quantity of exposure at all times to an original which has no relation with the fluctuation of the secondary scanning speed. CONSTITUTION:The pulse Pt produced from a shift degree detecting circuit TPG is supplied to a pulse generating circuit PSG. The circuit PSG produces a light source drive pulse Pl having a prescribed width and a rise at a prescribed time position to the time position of the pulse Pt, a start pulse Pr for reading plus a driving clock pulse of image sensor IS respectively. The pulse Pl is applied to a light source drive circuit LD, and the circuit LD applies the amplified pulse to an illuminating light source LS. Thus an original O is illuminated by the source LS and in a prescribed time width. The period T of a picture signal supplied from the sensor IS is always constant regardless of the secondary scanning speed of a reader.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56012433A JPS57127360A (en) | 1981-01-30 | 1981-01-30 | Reader of picture information |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56012433A JPS57127360A (en) | 1981-01-30 | 1981-01-30 | Reader of picture information |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57127360A true JPS57127360A (en) | 1982-08-07 |
JPH0318386B2 JPH0318386B2 (en) | 1991-03-12 |
Family
ID=11805149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56012433A Granted JPS57127360A (en) | 1981-01-30 | 1981-01-30 | Reader of picture information |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57127360A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60157A (en) * | 1983-06-15 | 1985-01-05 | Canon Inc | Picture input device |
JPS60109374A (en) * | 1983-11-14 | 1985-06-14 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | Scanning device |
JPS61133765A (en) * | 1984-12-03 | 1986-06-21 | Minolta Camera Co Ltd | Image reader |
JPH0225158A (en) * | 1988-07-14 | 1990-01-26 | Fujitsu Ltd | Image information reader |
JPH0484559A (en) * | 1990-07-27 | 1992-03-17 | Hitachi Ltd | Facsimile equipment |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5586264A (en) * | 1978-12-25 | 1980-06-28 | Mitsubishi Electric Corp | Original reader |
-
1981
- 1981-01-30 JP JP56012433A patent/JPS57127360A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5586264A (en) * | 1978-12-25 | 1980-06-28 | Mitsubishi Electric Corp | Original reader |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60157A (en) * | 1983-06-15 | 1985-01-05 | Canon Inc | Picture input device |
JPH0336351B2 (en) * | 1983-06-15 | 1991-05-31 | Canon Kk | |
JPS60109374A (en) * | 1983-11-14 | 1985-06-14 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | Scanning device |
JPS61133765A (en) * | 1984-12-03 | 1986-06-21 | Minolta Camera Co Ltd | Image reader |
JPH0225158A (en) * | 1988-07-14 | 1990-01-26 | Fujitsu Ltd | Image information reader |
JPH0484559A (en) * | 1990-07-27 | 1992-03-17 | Hitachi Ltd | Facsimile equipment |
Also Published As
Publication number | Publication date |
---|---|
JPH0318386B2 (en) | 1991-03-12 |
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