| 摘要 |
<p>PURPOSE:To input a coordinate commanded by a finger to a computer with simple structure, high accuracy and low cost by providing a weight detector, an average circuit, a storage circuit, a substractor and a coordinate calculation output circuit. CONSTITUTION:When outputs V1-V4 of the weight detectors 7a-7d are within a prescribed constant error, values Va1-Va4 average by the average circuits 8a-8d are led as they are to subtractors 10a-10d, and subtracted from the outputs V1-V4, and the resulting outputs f1-f4 are within + or -10mV. Since the cooridnate calculation output circuit 11 outputs a coordinate only when the sum of the outputs f1-f4, that is, an output corresponding to an external force exceeds a prescribed value, no coordinate output exists in this case. When any of the outputs V1-V4 exceeds a prescribed error, a value just before exceeding the error is stored in the storage circuits 9a-9d. That is, the outputs f1-f4 are outputs proportional to forces of component, and when the total sum exceeds a prescribed value, a coordinate value is outputted from the circuit 11. Thus, even when a noise is generated, the corrdinate value is obtained with high accuracy and low cost.</p> |
