| 摘要 |
<p>PURPOSE:To accurately recognize the contents described on a writing screen via a display device by outputting the picture information corresponding to the entire area of the writing screen or the picture information corresponding to a partial area of the writing screen to the display device in the form of picture signals equivalent to one screen in response to the switch signal received from a switch, etc. CONSTITUTION:In an electronic blackboard device, the picture information corresponding to the entire area of a writing screen or the picture information corresponding to a partial area of said screen is outputted to a display device in the form of picture signals equivalent to one screen in response to the switch signal received from a specific switch, etc., among those picture information obtained by drawing pictures on the writing screen by means of a writing tool, etc. In such a case, the picture information corresponding to the entire area of the writing screen is outputted as the picture signal equivalent to one screen. As a result, all pictures shown on said writing screen are displayed as they are on the screen of the display device. In the same way, the picture information corresponding to a partial area of the writing screen is outputted. Thus a part of the pictures shown on the writing screen is displayed with magnification on the screen of the display device in comparison with display of the entire pictures.</p> |
