| 摘要 |
<p>PURPOSE:To contrive to improve the accuracy of a selecting area and to increase the number of selecting areas by displaying a reference point at a cathode ray tube and adjusting a screen position in relation to a touch panel. CONSTITUTION:A screen position adjusting circuit 5 executes reference point displayings 13a-13d even at the outside of an operation displaying area 12 by a displaying control circuit 1 onto a tube surface 11 of a cathode ray tube 7. A deflecting voltage is made variable to a horizontal deflecting circuit 3 and a vertical deflecting circuit 4 so that the displaying signal of reference point displayings 13a-13d can be coincident to the position of photo diodes 10a-10d of a touch panel 8. Thus, a control signal to make variable the displaying size and the displaying position is respectively sent as HVADJ and VVADJ, and the photo diodes 10a-10d and the reference point displayings 13a-13d are made coincident. Thus, the position relation of the displaying area 12 and the touch panel 8 can be made always constant, the accuracy of the selecting area comes to be good and the number of the selecting areas can be also increased.</p> |
