FR2379955A1 - VARIABLE SPEED FACSIMILE TRANSMITTER USING A PHOTO-DETECTION NETWORK IN MEMORY MODE - Google Patents

VARIABLE SPEED FACSIMILE TRANSMITTER USING A PHOTO-DETECTION NETWORK IN MEMORY MODE

Info

Publication number
FR2379955A1
FR2379955A1 FR7804052A FR7804052A FR2379955A1 FR 2379955 A1 FR2379955 A1 FR 2379955A1 FR 7804052 A FR7804052 A FR 7804052A FR 7804052 A FR7804052 A FR 7804052A FR 2379955 A1 FR2379955 A1 FR 2379955A1
Authority
FR
France
Prior art keywords
photo
variable speed
clock pulse
memory mode
detection network
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
Application number
FR7804052A
Other languages
French (fr)
Other versions
FR2379955B1 (en
Inventor
Yutaka Tanaka
Takeshi Kubota
Setsuro Hashimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of FR2379955A1 publication Critical patent/FR2379955A1/en
Application granted granted Critical
Publication of FR2379955B1 publication Critical patent/FR2379955B1/fr
Granted legal-status Critical Current

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
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • 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)
  • Facsimile Scanning Arrangements (AREA)
  • Facsimile Heads (AREA)
  • Facsimile Transmission Control (AREA)

Abstract

Dans un émetteur de fac-similé à vitesse variable utilisant un réseau de photo-détection en mode mémoire comme explorateur de lignes, ce réseau est excité à un rythme d'horloge choisi parmi plusieurs rythmes sélectionnables de façon à engendrer un signal de lignes vidéo en réponse à chaque impulsion d'horloge. Le reseau de photo-détection est déchargé à un instant retardé, par rapport à l'arrivée d'une impulsion d'horloge, d'un intervalle déterminé par la différence entre le rythme d'horloge sélectionné et le rythme d'horloge le plus élevé pour écarter signal vidéo disponible à cet instant et ensuite, laisser se développer une charge pendant le reste de l'intervalle entre les impulsions d'horloge, où il résulte qu'un signal de ligne vidéo d'amplitude constante prend naissance à l'arrivée de chaque impulsion d'horloge quel que soit le rythme d'horloge sélectionné.In a variable speed facsimile transmitter using a memory mode photo-detection array as a line explorer, that array is excited at a clock rate selected from a number of selectable rates so as to generate a video line signal in. response to each clock pulse. The photo-detection network is discharged at a time delayed, with respect to the arrival of a clock pulse, by an interval determined by the difference between the selected clock rate and the fastest clock rate. high to remove the video signal available at that time and then allow a charge to develop for the remainder of the clock pulse interval, whereby a constant amplitude video line signal arises at the same time. arrival of each clock pulse regardless of the selected clock rate.

FR7804052A 1977-02-07 1978-02-07 VARIABLE SPEED FACSIMILE TRANSMITTER USING A PHOTO-DETECTION NETWORK IN MEMORY MODE Granted FR2379955A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52012729A JPS5855712B2 (en) 1977-02-07 1977-02-07 Facsimile scanning method

Publications (2)

Publication Number Publication Date
FR2379955A1 true FR2379955A1 (en) 1978-09-01
FR2379955B1 FR2379955B1 (en) 1983-01-14

Family

ID=11813518

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7804052A Granted FR2379955A1 (en) 1977-02-07 1978-02-07 VARIABLE SPEED FACSIMILE TRANSMITTER USING A PHOTO-DETECTION NETWORK IN MEMORY MODE

Country Status (5)

Country Link
JP (1) JPS5855712B2 (en)
CA (1) CA1130443A (en)
DE (1) DE2804979A1 (en)
FR (1) FR2379955A1 (en)
GB (1) GB1572539A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011023A1 (en) * 1978-11-03 1980-05-14 Thomson-Csf Scanning device with photosensors and facsimile apparatus comprising such a device
EP0251817A2 (en) * 1986-07-04 1988-01-07 Canon Kabushiki Kaisha Method of reading signal in charge-storage line sensor

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53141520A (en) * 1977-05-16 1978-12-09 Ricoh Co Ltd Picture scanning read system of semiconductor photo detector
US4223357A (en) * 1978-10-23 1980-09-16 Alden Research Foundation Facsimile recorder with sweep rate detection
JPS56158571A (en) * 1980-05-12 1981-12-07 Nec Corp Facsimile dispatching broadcast communication system
JPS5995769A (en) * 1982-11-25 1984-06-01 Hitachi Ltd Ccd sensor driver
DE3525395A1 (en) * 1984-07-17 1986-01-30 Canon K.K., Tokio/Tokyo IMAGE READER

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2304448A1 (en) * 1972-01-31 1973-08-09 Hitachi Ltd LIGHT SENSOR CONTROL DEVICE
US3867569A (en) * 1974-02-25 1975-02-18 Bell Telephone Labor Inc Compact flatbed page scanner

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49130118A (en) * 1973-04-13 1974-12-13
JPS5423761B2 (en) * 1975-03-13 1979-08-16

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2304448A1 (en) * 1972-01-31 1973-08-09 Hitachi Ltd LIGHT SENSOR CONTROL DEVICE
US3867569A (en) * 1974-02-25 1975-02-18 Bell Telephone Labor Inc Compact flatbed page scanner

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NV8056/75 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011023A1 (en) * 1978-11-03 1980-05-14 Thomson-Csf Scanning device with photosensors and facsimile apparatus comprising such a device
FR2440668A1 (en) * 1978-11-03 1980-05-30 Thomson Csf PHOTOSENSOR ANALYSIS DEVICE AND FACSIMILE APPARATUS COMPRISING SUCH A DEVICE
EP0251817A2 (en) * 1986-07-04 1988-01-07 Canon Kabushiki Kaisha Method of reading signal in charge-storage line sensor
EP0251817A3 (en) * 1986-07-04 1989-04-26 Canon Kabushiki Kaisha Method of reading signal in charge-storage line sensor

Also Published As

Publication number Publication date
JPS5397319A (en) 1978-08-25
DE2804979B2 (en) 1981-07-18
FR2379955B1 (en) 1983-01-14
CA1130443A (en) 1982-08-24
JPS5855712B2 (en) 1983-12-10
DE2804979C3 (en) 1982-05-13
DE2804979A1 (en) 1978-08-17
GB1572539A (en) 1980-07-30

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