JPS6215987U

JPS6215987U -

Info

Publication number: JPS6215987U
Application number: JP10826585U
Authority: JP
Priority date: 1985-07-16
Filing date: 1985-07-16
Publication date: 1987-01-30

Description

[Brief explanation of the drawing]

第１図はこの考案の第一の実施例を示すブロツ
ク図、第２図はデータ処理を示すフローチヤート
、第３図は電子黒板の概略構成を示す平面図、第
４図はホワイトシートを展開して示す正面図、第
５図は全体の回路構成を示すブロツク図、第６図
ないし第８図はその一部の信号の授受を示すブロ
ツク図、第９図はフローチヤート、第１０図はこ
の考案の第二の実施例を示すブロツク図、第１１
図ａ〜ｃはそのデータ処理を示す特性図、第１２
図はフローチヤートである。２……ホワイトシート、３……筆記面、１３…
…読取り手段、１７……ＣＣＤ（光電変換素子）
、２０……ＣＰＵ（演算部）、３８ａ，３８ｂ…
…デジタルコンパレータ、４１……演算部、４２
……罫線、４３……デジタルコンパレータ。 Figure 1 is a block diagram showing the first embodiment of this invention, Figure 2 is a flowchart showing data processing, Figure 3 is a plan view showing the schematic configuration of the electronic blackboard, and Figure 4 is an expanded white sheet. 5 is a block diagram showing the overall circuit configuration, FIGS. 6 to 8 are block diagrams showing part of the signal exchange, FIG. 9 is a flowchart, and FIG. 10 is a block diagram showing the overall circuit configuration. Block diagram showing the second embodiment of this invention, No. 11
Figures a to c are characteristic diagrams showing the data processing, 12th
The figure is a flowchart. 2...White sheet, 3...Writing surface, 13...
...reading means, 17...CCD (photoelectric conversion element)
, 20...CPU (calculation unit), 38a, 38b...
... Digital comparator, 41 ... Arithmetic unit, 42
... Ruled line, 43 ... Digital comparator.

Claims

[Claims for Utility Model Registration] 1. A plurality of writing surfaces formed on a sheet that can be freely written on and erased, a means for moving the sheet, and a means for exposing and scanning the writing surfaces on the moved sheet to read the contents. In an electronic blackboard that is equipped with a reading means including a photoelectric conversion element that converts into an electrical signal and reads it, and a means for printing the read content on the writing surface, the output data read by the photoelectric conversion element of the reading means is converted into a binary value. A multi-system comparator is provided with a plurality of threshold levels set for conversion processing, and the binarized data from this comparator is calculated and output based on the threshold level selected based on the copy mode instruction. An electronic blackboard characterized by being provided with a calculation section; 2. A utility model registration characterized in that the plurality of threshold levels are levels set for distinguishing images of different colors written on the sheet. An electronic whiteboard according to claim 1. 3. Utility model registration claim 1, characterized in that the plurality of threshold levels are levels set to distinguish between a written image on a sheet and a ruled line printed on the sheet. electronic blackboard.