JPS648427A - Coordinate data input device - Google Patents

Abstract

PURPOSE:To minimize the shear of a display position of an input pen by constituting the titled device so that the detection of positional coordinates is neglected when the input pen lightly depresses a tablet. CONSTITUTION:When the input pen 6 depresses the tablet 1, a control circuit 10 detecting the depression closes switches 9A, 9B on the basis of a received switching signal S to set up the detecting state of the X coordinate of the pen 6, executes current-voltage conversion and compares an output voltage X1+X2 with a specific value XK in a data memory 12. When the output voltage is larger than the XK, the X coordinate of the pen 6 is found out and stored in the data memory 12. The circuit 10 reads out data from the memory 12, writes the read contents in an image memory 13 and displays the position of the pen on a display device 14. When X1+X2 or Y1+Y2 is smaller than the specific value XK, the circuit 10 neglects the detection of the positional coordinates of the pen 6 to prevent data from being displayed on a sheared position.