DE2401943A1 - Vorrichtung zur halbton-aufzeichnung auf elektrostatischem papier - Google Patents
Vorrichtung zur halbton-aufzeichnung auf elektrostatischem papierInfo
- Publication number
- DE2401943A1 DE2401943A1 DE2401943A DE2401943A DE2401943A1 DE 2401943 A1 DE2401943 A1 DE 2401943A1 DE 2401943 A DE2401943 A DE 2401943A DE 2401943 A DE2401943 A DE 2401943A DE 2401943 A1 DE2401943 A1 DE 2401943A1
- Authority
- DE
- Germany
- Prior art keywords
- pulse
- facsimile
- generating
- writer according
- triangular
- 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
- 239000003550 marker Substances 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 9
- 239000003990 capacitor Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001085205 Prenanthella exigua Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
- H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
- H04N1/4056—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern the pattern varying in one dimension only, e.g. dash length, pulse width modulation [PWM]
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Fax Reproducing Arrangements (AREA)
- Facsimiles In General (AREA)
- Facsimile Image Signal Circuits (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00329649A US3830967A (en) | 1973-02-05 | 1973-02-05 | Apparatus for half tone marking electrostatic paper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2401943A1 true DE2401943A1 (de) | 1974-08-08 |
Family
ID=23286389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2401943A Pending DE2401943A1 (de) | 1973-02-05 | 1974-01-16 | Vorrichtung zur halbton-aufzeichnung auf elektrostatischem papier |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3830967A (enExample) |
| CA (1) | CA998164A (enExample) |
| DE (1) | DE2401943A1 (enExample) |
| FR (1) | FR2216738B1 (enExample) |
| GB (1) | GB1447807A (enExample) |
| IT (1) | IT1002481B (enExample) |
| SE (1) | SE400008B (enExample) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4014030A (en) * | 1976-02-23 | 1977-03-22 | Xerox Corporation | Half-tone imaging with flying spot scanner system |
| JPS5537092A (en) * | 1978-09-05 | 1980-03-14 | Ibm | Mode switch for setting threshold value |
| US4276569A (en) * | 1979-04-20 | 1981-06-30 | Exxon Research & Engineering Co. | Method and apparatus for producing a facsimile gray scale |
| JPS57160264A (en) * | 1981-03-30 | 1982-10-02 | Canon Inc | Recorder of half tone picture |
| FR2596226B1 (fr) * | 1986-03-19 | 1988-12-02 | Vignon Bernard | Procede de reproduction d'une image a partir de la numerisation de cette image |
| JPH02126771A (ja) * | 1988-11-07 | 1990-05-15 | Aisin Seiki Co Ltd | 画像情報の２値化方法および装置 |
| DE69030252T2 (de) * | 1990-01-04 | 1997-09-04 | Eastman Kodak Co | Anschlagfreier drucker und grauwertaufzeichnungsverfahren |
| JPH05300346A (ja) * | 1992-04-20 | 1993-11-12 | Konica Corp | 画像形成装置 |
| US7553152B2 (en) * | 2005-06-23 | 2009-06-30 | Honeywell International Inc. | Flame detector trapezoidal excitation generator output control circuit and method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3413412A (en) * | 1964-12-30 | 1968-11-26 | Xerox Corp | Pulse width discriminator circuit for eliminating noise pulses below a predeterminedminimum width |
| FR1457309A (fr) * | 1965-05-13 | 1966-01-24 | Colos Soc | Procédé et dispositif électroniques de reproduction des demi-teintes sur électrostencil |
| US3469028A (en) * | 1965-07-05 | 1969-09-23 | Tokyo Shibaura Electric Co | Electrode control systems of a multineedle electrode type electrostatic recording device |
| US3419676A (en) * | 1965-07-20 | 1968-12-31 | Stanford Research Inst | Line scan printer |
| DE1487762A1 (de) * | 1965-12-30 | 1969-01-30 | Victor Company Of Japan | Einrichtung zum magnetischen Aufzeichnen und Wiedergeben eines Bildsignals |
| US3614307A (en) * | 1967-10-16 | 1971-10-19 | Matsushita Electric Industrial Co Ltd | Discharge lamp modulation system |
| US3745408A (en) * | 1969-02-20 | 1973-07-10 | Ampex | Intelligence transducing beam modulation method and apparatus |
| US3631509A (en) * | 1969-07-02 | 1971-12-28 | Varian Associates | High-speed coincident pulse electrographic printer with gray scale printing capability |
-
1973
- 1973-02-05 US US00329649A patent/US3830967A/en not_active Expired - Lifetime
- 1973-12-21 GB GB5954873A patent/GB1447807A/en not_active Expired
- 1973-12-31 IT IT32464/73A patent/IT1002481B/it active
-
1974
- 1974-01-15 CA CA190,107A patent/CA998164A/en not_active Expired
- 1974-01-16 DE DE2401943A patent/DE2401943A1/de active Pending
- 1974-01-24 FR FR7402358A patent/FR2216738B1/fr not_active Expired
- 1974-02-04 SE SE7401430A patent/SE400008B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SE400008B (sv) | 1978-03-06 |
| FR2216738B1 (enExample) | 1977-06-10 |
| US3830967A (en) | 1974-08-20 |
| GB1447807A (en) | 1976-09-02 |
| FR2216738A1 (enExample) | 1974-08-30 |
| CA998164A (en) | 1976-10-05 |
| IT1002481B (it) | 1976-05-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OHJ | Non-payment of the annual fee |