JPS6489655A - Electronic blackboard device - Google Patents

Electronic blackboard device

Info

Publication number
JPS6489655A
JPS6489655A JP62247063A JP24706387A JPS6489655A JP S6489655 A JPS6489655 A JP S6489655A JP 62247063 A JP62247063 A JP 62247063A JP 24706387 A JP24706387 A JP 24706387A JP S6489655 A JPS6489655 A JP S6489655A
Authority
JP
Japan
Prior art keywords
filter
picture
comes
opening
output signal
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
Application number
JP62247063A
Other languages
Japanese (ja)
Inventor
Kiyotaka Uehira
Chikao Kenji
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
Priority to JP62247063A priority Critical patent/JPS6489655A/en
Publication of JPS6489655A publication Critical patent/JPS6489655A/en
Pending legal-status Critical Current

Links

Landscapes

  • Drawing Aids And Blackboards (AREA)
  • Facsimiles In General (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Color Image Communication Systems (AREA)

Abstract

PURPOSE:To recognize a hue, and to color-print a picture by positioning an opening and plural filters successively in an optical path as letting them synchronize with the movement of a writing medium. CONSTITUTION:A filter plate 11 rotates as synchronizing with the movement of the writing medium, and the opening 11a and the plural filters 11b, 11c, 11d are switched successively. The respective filters to be used at that time are made to be the one to transmit a color alternatively. Then, all the pictures having passed through the opening 11a are the same for the different colors A, B, C, and output signals corresponding to those are uniform as shown by (e). Next, as for a picture having passed through the first filter 11b, the output signal corresponding to the picture A is lowered lower than others, and comes to be the output signal of (f). Similarly, in the case of the second filter 11c, it comes the output signal as shown by (g), and in the case of the third filter 11d, it comes as shown by (h). By comparing these signals (e)-(h) by a control circuit, the hue of the pictures A, B, C can be discriminated.
JP62247063A 1987-09-29 1987-09-29 Electronic blackboard device Pending JPS6489655A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62247063A JPS6489655A (en) 1987-09-29 1987-09-29 Electronic blackboard device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62247063A JPS6489655A (en) 1987-09-29 1987-09-29 Electronic blackboard device

Publications (1)

Publication Number Publication Date
JPS6489655A true JPS6489655A (en) 1989-04-04

Family

ID=17157869

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62247063A Pending JPS6489655A (en) 1987-09-29 1987-09-29 Electronic blackboard device

Country Status (1)

Country Link
JP (1) JPS6489655A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5479500A (en) * 1991-03-28 1995-12-26 Canon Kabushiki Kaisha Communication apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5479500A (en) * 1991-03-28 1995-12-26 Canon Kabushiki Kaisha Communication apparatus

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