Ricoh Company, Ltd.

Tsutomu Ogasawara

Takahiro Ito

Kenichi Takekawa

The coordinate-position input device has a frame with a reflecting member for recursively reflecting light provided in an inner side from four edges of the frame forming a rectangular form. Two optical units irradiate light to the reflecting members and receive the reflected light. With the mounting member(s) the frame can be detachably attached to a white board. The two optical units are located at both ends of any one of frame edges forming the frame, and at the same time the two optical units and the frame body are integrated to each other.

Method and device for inputting coordinate-position and a display board system

A coordinates input device comprises, two optical units which emit a light flux onto a panel and also receive the light flux. The coordinates input device then calculates the coordinates of an obstacle in the light flux on the panel based on the result of light flux detection in the optical units and the dimensions of the panel. The coordinates input device further comprises a sound-wave generator and a sound-wave detector for measuring the dimensions, used in the calculation of the coordinates, of the panel.

Coordinates input device, coordinates input method, a display board system

A coordinate-position detecting device comprising a white board as a coordinate-position entry area, and three reflecting members each for recursively reflecting light from two optical units. The angle between the write-in surface of the white board and the reflecting surface of the reflecting member at the bottom is an obtuse angle. Further, of angles obtained by dividing the above angle by a horizontal surface, the angle between the horizontal surface and the reflecting surface is an acute angle.

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Aichi, Japan

Tsutomu Ogasawara