| 摘要 |
PURPOSE:To attain the confirmation of depressing of a dial button and to prevent mis-operation by lighting a depressed dial button when a dial pad is depressed. CONSTITUTION:Light emitting diodes D1-D12 are incorporated to the dial pad 5 for dial oscillating operation. A dial pulse transmission circuit 2a transmits a dial signal corresponding to the depressed pad 5. Furthermore, a memory 3 stores information transmitted from the circuit 2a. Then a lighting circuit 4 inputs a signal outputted sequentially from the memory 3 and lights the diodes D1-D12. |
