| 摘要 |
<p>PURPOSE:To detect the double pushing with the change of a current to flow at a first conducting sheet by supervising the change of the current to flow at the first conduction sheet to form a potential grade. CONSTITUTION:A touch panel to face first and second conducting sheets 1 and 2 at a fine interval is held, a potential grade is formed through a current to a first conducting sheet 1, when the touch panel is pushed down, the potential of the first conducting sheet 1 at the contact is detected by a second conducting sheet 2 and thus, a contacting position is calculated. In this case, current detecting means 8 and 9 to detect the current to flow at the first conducting sheet 1 are provided, the current detecting means 8 and 9 are referred to when the potential is detected from the second conducting sheet 2 and when the current is increased more than the ordinary one, a deciding means to judge that the touch panel is double-pushed down is provided. At the time of the double-pushing-down, since parallel lines 13 and 14 are formed between two pushed-down points, the resistance value between these is lowered and the current to flow as a whole is increased. By supervising this, the double pushing- down can be detected.</p> |
