JPS55110468A - Intermediate tone reproducing system for facsimile unit - Google Patents
Intermediate tone reproducing system for facsimile unitInfo
- Publication number
- JPS55110468A JPS55110468A JP1872679A JP1872679A JPS55110468A JP S55110468 A JPS55110468 A JP S55110468A JP 1872679 A JP1872679 A JP 1872679A JP 1872679 A JP1872679 A JP 1872679A JP S55110468 A JPS55110468 A JP S55110468A
- Authority
- JP
- Japan
- Prior art keywords
- output
- level
- intermediate tone
- excess
- negative
- 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
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Fax Reproducing Arrangements (AREA)
- Facsimile Image Signal Circuits (AREA)
Abstract
PURPOSE: To reproduce the intermediate tone of facsimile signal with fidelity, by converting the reception video signal including the intermediate tone into the pulse train having the width corresponding to the level.
CONSTITUTION: The system consists of the detection circuit 1 and the oscillation circuit 2 oscillating triangle waves having higher frequency than the specified maximum video frequency. Further, the detection output 1' makes level change in response to white and black of original; low level L corresponds to white, high level H to black, and changed part of intermediate level to the intermediate tone. At the area where the oscillation output 2' is not exceeded negative from the detection output 1', the compared output 3' is VEE. When the part in excess of negative part is caused, the output 3' momentarily increases to Vcc to keep Vcc for the period in excess of it. The more the output 1' goes to the level H, the longer is the period in excess of negative side of the triangle waves 2' developed one after another and the longer is the pulse width of the output 3'. This output 3' indicates intermediate tone and it the pulse train having the width corresponding to the change in the intermediate level of the output 1'. If the output 2' does not exceed the output 1', the output 3' is fixed to Vcc. By applying the output 3' like this to the recording electrode, the size of nozzle spattered particles of ink jet system changes correspondingly.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1872679A JPS55110468A (en) | 1979-02-20 | 1979-02-20 | Intermediate tone reproducing system for facsimile unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1872679A JPS55110468A (en) | 1979-02-20 | 1979-02-20 | Intermediate tone reproducing system for facsimile unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55110468A true JPS55110468A (en) | 1980-08-25 |
Family
ID=11979664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1872679A Pending JPS55110468A (en) | 1979-02-20 | 1979-02-20 | Intermediate tone reproducing system for facsimile unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55110468A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6213357A (en) * | 1985-07-12 | 1987-01-22 | Tokyo Electric Co Ltd | Ink jet printer |
| JPS62278871A (en) * | 1986-05-28 | 1987-12-03 | Canon Inc | Image forming device |
| US5365346A (en) * | 1987-03-16 | 1994-11-15 | Sharp Kabushiki Kaisha | Image signal processor generating reduced memory consumption still images yet preserving image quality |
-
1979
- 1979-02-20 JP JP1872679A patent/JPS55110468A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6213357A (en) * | 1985-07-12 | 1987-01-22 | Tokyo Electric Co Ltd | Ink jet printer |
| JPS62278871A (en) * | 1986-05-28 | 1987-12-03 | Canon Inc | Image forming device |
| US5365346A (en) * | 1987-03-16 | 1994-11-15 | Sharp Kabushiki Kaisha | Image signal processor generating reduced memory consumption still images yet preserving image quality |
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