| 摘要 |
<p>The sensitive coordinate input device of the invention adopts a system in which the finger F of the operator is regarded as one electrode, and the electrostatic capacitance is varied depending on the changes of distances between the finger and another electrode which is separated therefrom via a dielectric. Four electrodes 11, 12, 13, and 14 are disposed at regular angular positions. Among the four electrodes 11, 12, 13, and 14, two electrodes 11 and 12, and two electrodes 13 and 14 which are located at opposite positions are spaced with intervals, respectively. Across the four electrodes 11, 12, 13, and 14, a sensitive member 15 is laid. The surface of the sensitive member 15 is to be touched with the operator's finger F. The sensitive member 15 is preferably formed by a dielectric having a high dielectric constant, such as a ceramic plate. According to the invention, the area of sensitive area can easily be increased, and the determination of the cursor position on the screen of the CRT display apparatus can readily be performed. <IMAGE></p> |
