| 摘要 |
<p>PURPOSE:To set an input position back to a screen position designated previously just with a simple operation of a clear swith with no large movement of the hand of an operator when the input position is shifted largely from a desired screen position or the operator misses the input position. CONSTITUTION:The revolution of a movement pointing ball 1 is decomposed in the biaxial direction by a revolution decomposer 2. A rotational frequency counter pair 6 counts the rotational frequency per unit time. Then the counted number of revolution is sent to a host computer via a transmission circuit 8 and at the same time accumulated in an integrator pair 10. The contents of the pair 10 are cleared with the operation of a clear switch 12, and a control part 14 is actuated with the operation of a returning switch 13. Then the contents of the pair 10 undergo the code inversion through a code inverting circuit 11 and are sent to the host computer.</p> |
