| 摘要 |
PURPOSE:To express data at high fidelity by providing a two way data transmitting means to an external equipment connected to the external equipment and projecting data transmitted from the external equipment on a blackboard. CONSTITUTION:When an operator depresses an operation key, rotary shafts 4, 5 start rotation, and the surface of a beltlike photosensitive body 3 on which characteristics, etc., are written by an operator, that is, the part surface side from the hard board 2 of the beltlike photosensitive body 3 moves to the backside of the hard board 2. In such case, a characters, etc., written on the beltlike photosensitive body 3 by a light source 6 form an image on a photosensitive body drum 10 provided separately from the beltlike photosensitive body 3 by an optical unit such as a first mirror 7, a lens 8, a second mirror 9, etc. Rotation of the beltlike photosensitive body 3 is synchronized with the rotation of the photosensitive drum 10, and the image of characters, etc., on the photosensitive body 3 is formed in the specific area of the surface of the photosensitive body drum 10.
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