To provide an electronic display system by which pen information is operated at hand and which is not restricted by means of a blackboard position by permitting a controller to synthesize pieces of plotting information which are transmitted from respective terminals and individually stored and their attributes on a two-dimensional screen and transmitting them to an electronic display device so as to display it.
The terminal reports plotting information to be displayed in the electronic display device 3 by a user and terminal identifying numbers from a call originating equipment 4 to a personal computer 2. The personal computer 2 imparts the attributes corresponding to the identifying numbers to the signals, generates the pieces of plotting information and transmits them to the electronic display device 3. The device 3 displays the pictures desired by the users of the terminals based on data from the personal computer 2. The mobile history 50 of the call originating equipment 4 is plotted in the device 3. The change of linear attributes can be executed by an owner at hand and plural kinds of lines are displayed in the electronic display device 3.
OTANI YOSHIMITSU
SUZUKI TAKAFUMI
NAKAJIMA HIDEKI
