| 摘要 |
<p>PURPOSE:To obtain an exact coordinate value by constituting a coordinate input device so that a circuit delay time and an off-set time can not be included into respective oscillation transmission times from a prescribed point on an oscillation transmission board to an oscillating sensor and from an oscillating pen to the oscillating sensor. CONSTITUTION:A coordinate input is executed by an oscillating pen 3 to an input tablet, which is composed of an oscillation transmission board 8, and according to an inputted coordinate signal, an input picture is displayed on a display 11' to be composed of a CRT which is overlapped and arranged to the input tablet. The transmission board 8 is made of acrylic resin and a glass board, etc., whose edge is surrounded by a reflection preventing member 7 of silicone rubber, etc., and oscillation to be transmitted from the oscillating pen 3 is added to three oscillating sensors 6 which are provided in corner parts. Thus, a coordinate track to be traced by the pen 3 is menu-displayed on the display 11' and the coordinate without delay and off-set can be obtained.</p> |
