FR2382335A1 - Circuit de reglage de densite d'impression - Google Patents
Circuit de reglage de densite d'impressionInfo
- Publication number
- FR2382335A1 FR2382335A1 FR7805963A FR7805963A FR2382335A1 FR 2382335 A1 FR2382335 A1 FR 2382335A1 FR 7805963 A FR7805963 A FR 7805963A FR 7805963 A FR7805963 A FR 7805963A FR 2382335 A1 FR2382335 A1 FR 2382335A1
- Authority
- FR
- France
- Prior art keywords
- adjustment circuit
- density adjustment
- print density
- signal
- scanner
- 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
- H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
- H04N1/4051—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Fax Reproducing Arrangements (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Ink Jet (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
L'invention concerne les copieurs à jets d'encre. Elle se rapporte à un copieur dans lequel le circuit de réglage de la densité d'impression comprend un intégrateur qui reçoit le signal de sortie du dispositif de balayage et transmet un premier signal de validation chaque fois que la valeur intégrée atteint un niveau prédéterminé, et un détecteur de niveau qui contrôle le signal de sortie du dispositif de balayage et transmet un second signal de validation lorsque le signal qu'il reçoit dépasse un niveau prédéterminé. Un train d'impulsions de commande d'impression est transmis après réception de l'un ou l'autre des signaux de validation. Application à la commande des imprimantes à jets d'encre.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/774,154 US4106061A (en) | 1977-03-03 | 1977-03-03 | Density control for ink jet copier |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2382335A1 true FR2382335A1 (fr) | 1978-09-29 |
FR2382335B1 FR2382335B1 (fr) | 1984-01-27 |
Family
ID=25100405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7805963A Granted FR2382335A1 (fr) | 1977-03-03 | 1978-03-02 | Circuit de reglage de densite d'impression |
Country Status (13)
Country | Link |
---|---|
US (1) | US4106061A (fr) |
JP (1) | JPS5855714B2 (fr) |
BE (1) | BE864553A (fr) |
BR (1) | BR7801283A (fr) |
CA (1) | CA1090863A (fr) |
CH (1) | CH630008A5 (fr) |
DE (1) | DE2809338C3 (fr) |
FR (1) | FR2382335A1 (fr) |
GB (1) | GB1556642A (fr) |
IL (1) | IL53864A (fr) |
IT (1) | IT1107053B (fr) |
NL (1) | NL7800930A (fr) |
SE (1) | SE428166B (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2446356A1 (fr) * | 1979-01-12 | 1980-08-08 | Valmet Oy | Procede et dispositif pour traiter une nappe fibreuse |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4112469A (en) * | 1977-04-21 | 1978-09-05 | The Mead Corporation | Jet drop copying apparatus |
US4155103A (en) * | 1977-11-28 | 1979-05-15 | The Mead Corporation | Dot matrix copying apparatus |
JPS6023541B2 (ja) * | 1978-05-02 | 1985-06-07 | 株式会社リコー | デイジタル複写機 |
DE2936667A1 (de) * | 1978-09-12 | 1980-03-20 | Canon Kk | Kopiergeraet |
US4207579A (en) * | 1979-01-08 | 1980-06-10 | The Mead Corporation | Reciprocating paper handling apparatus for use in an ink jet copier |
US4225872A (en) * | 1979-01-31 | 1980-09-30 | The Mead Corporation | Ink jet printer |
US4285507A (en) * | 1979-01-31 | 1981-08-25 | The Mead Corporation | Ink jet printer |
JPS55130781A (en) * | 1979-03-30 | 1980-10-09 | Canon Inc | Liquid injecting recorder |
US4237466A (en) * | 1979-05-07 | 1980-12-02 | The Mead Corporation | Paper transport system for an ink jet printer |
US4278999A (en) * | 1979-09-12 | 1981-07-14 | The Mead Corporation | Moving image scanner |
US4469026A (en) * | 1979-09-20 | 1984-09-04 | Ibm Corporation | Method and apparatus for controlling drying and detaching of printed material |
US4321627A (en) * | 1979-09-20 | 1982-03-23 | International Business Machines Corporation | Optical scanner for ink jet printer |
JPS5691228A (en) * | 1979-12-25 | 1981-07-24 | Fuji Photo Film Co Ltd | Laser recorder |
JPS5738065A (en) * | 1980-08-20 | 1982-03-02 | Canon Inc | Video forming device |
US4394685A (en) * | 1980-09-04 | 1983-07-19 | Centronics Data Computer Corporation | Interface for operating a dot matrix printer for printing a video image |
GB2089165B (en) * | 1980-10-30 | 1985-10-09 | Canon Kk | Character and image processing |
US4554593A (en) * | 1981-01-02 | 1985-11-19 | International Business Machines Corporation | Universal thresholder/discriminator |
US4395031A (en) * | 1981-09-08 | 1983-07-26 | The Webb Company | Apparatus for printing books of signatures and method for same |
US4642681A (en) * | 1982-10-08 | 1987-02-10 | Canon Kabushiki Kaisha | Color image processing apparatus for generating color output signals and a black output signal in a mutually exclusive manner |
JPS6062779A (ja) * | 1983-08-31 | 1985-04-10 | Nec Corp | インクジェット記録方法 |
DE3343907C2 (de) * | 1983-12-05 | 1986-02-27 | Lothar 5300 Bonn Becker | Optoelektronischer Handkopierer |
JPS60208182A (ja) * | 1984-03-30 | 1985-10-19 | Canon Inc | ビデオ画像記録装置 |
US4872063A (en) * | 1988-03-17 | 1989-10-03 | Optum Corporation | Method to increase scanning resolution using a synthetic aperture |
US5028192A (en) * | 1988-07-15 | 1991-07-02 | Foote & Davies, Inc. | Binding and collating techniques |
US5070410A (en) * | 1989-03-21 | 1991-12-03 | Hewlett-Packard Company | Apparatus and method using a combined read/write head for processing and storing read signals and for providing firing signals to thermally actuated ink ejection elements |
US5532825A (en) * | 1993-08-30 | 1996-07-02 | Hewlett-Packard Company | Add-on scanner for existing ink jet printer |
DE69417319T2 (de) * | 1993-08-30 | 1999-07-15 | Hewlett Packard Co | Bildabtastkopf für einen thermischen Tintenstrahldrucker |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1973725A (en) * | 1934-09-18 | Picture transmission amplifier | ||
LU39915A1 (fr) * | 1960-04-01 | |||
US3294896A (en) * | 1963-07-24 | 1966-12-27 | Bell Telephone Labor Inc | Digital encoder for facsimile transmission |
FR1457309A (fr) * | 1965-05-13 | 1966-01-24 | Colos Soc | Procédé et dispositif électroniques de reproduction des demi-teintes sur électrostencil |
US3580995A (en) * | 1968-04-29 | 1971-05-25 | Rca Corp | Constant sized halftone dot image generator |
US3613103A (en) * | 1969-07-25 | 1971-10-12 | Alden Res Found | Analog signal modifying apparatus |
JPS4883723A (fr) * | 1972-02-08 | 1973-11-08 | ||
US3928718A (en) * | 1973-05-09 | 1975-12-23 | Hitachi Ltd | Image reproducing system |
US3977007A (en) * | 1975-06-02 | 1976-08-24 | Teletype Corporation | Gray tone generation |
-
1977
- 1977-03-03 US US05/774,154 patent/US4106061A/en not_active Expired - Lifetime
-
1978
- 1978-01-13 CA CA294,955A patent/CA1090863A/fr not_active Expired
- 1978-01-22 IL IL53864A patent/IL53864A/xx unknown
- 1978-01-26 NL NL7800930A patent/NL7800930A/xx not_active Application Discontinuation
- 1978-02-08 IT IT67250/78A patent/IT1107053B/it active
- 1978-02-24 JP JP53020810A patent/JPS5855714B2/ja not_active Expired
- 1978-03-02 SE SE7802365A patent/SE428166B/sv not_active IP Right Cessation
- 1978-03-02 FR FR7805963A patent/FR2382335A1/fr active Granted
- 1978-03-02 BR BR7801283A patent/BR7801283A/pt unknown
- 1978-03-02 GB GB8406/78A patent/GB1556642A/en not_active Expired
- 1978-03-03 BE BE185664A patent/BE864553A/fr not_active IP Right Cessation
- 1978-03-03 CH CH235678A patent/CH630008A5/de not_active IP Right Cessation
- 1978-03-03 DE DE2809338A patent/DE2809338C3/de not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2446356A1 (fr) * | 1979-01-12 | 1980-08-08 | Valmet Oy | Procede et dispositif pour traiter une nappe fibreuse |
Also Published As
Publication number | Publication date |
---|---|
JPS5855714B2 (ja) | 1983-12-10 |
DE2809338B2 (de) | 1981-05-07 |
IL53864A (en) | 1980-11-30 |
GB1556642A (en) | 1979-11-28 |
DE2809338A1 (de) | 1978-09-07 |
JPS53109430A (en) | 1978-09-25 |
IL53864A0 (en) | 1978-04-30 |
CH630008A5 (de) | 1982-05-28 |
DE2809338C3 (de) | 1982-01-28 |
FR2382335B1 (fr) | 1984-01-27 |
NL7800930A (nl) | 1978-09-05 |
CA1090863A (fr) | 1980-12-02 |
SE428166B (sv) | 1983-06-06 |
BR7801283A (pt) | 1978-09-26 |
BE864553A (fr) | 1978-09-04 |
US4106061A (en) | 1978-08-08 |
SE7802365L (sv) | 1978-09-04 |
IT7867250A0 (it) | 1978-02-08 |
IT1107053B (it) | 1985-11-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TP | Transmission of property | ||
ST | Notification of lapse |