| 摘要 |
PURPOSE:To suppress the power consumption of a battery, by illuminating a light emitting element at every time when a call start button switch is depressed and a dial button succeeding to the depression is depressed to confirm the position of the dial button. CONSTITUTION:In depressing a button 5 having single or a plurality of projections 5-1, electromagnetic waves having a prescribed frequency are emitted and the electromagnetic waves of the prescribed frequency from a transmitter of a base station are received at a receiver to complete the circuit and an output signal is inputted to an AND circuit 10 of an illumination control circuit 9 from a control circuit 13 of the receiver. Further, a pulse signal generated through the depression of each dial button 4 is inputted to the AND circuit 10, and every time when the call start button 5 and the dial button 4 succeeding to the button 5 are depressed, a pulse signal is outputted from an OR circuit 11. A timer 12 is started with this signal to turn on a light emitting element 6 by the output of the timer 12. Thus, the position of the dial button to be depressed next can be confirmed easily. |
