PURPOSE: To turn on a lighting means speedily at the time of calling by detecting a handset part being put off the hook and driving and turning on the lighting means.
CONSTITUTION: When the handset part 12 is put off a board, a control part 6 detects that from information from a detection switch 13 and sends a control signal to a lighting driving part 10, so that a lighting source 11 is driven to illuminates for a certain time. This specific period is set long enough to enable sufficient key operation for calling at the time of origination and termination, and the lighting source is turned off the period later to save the electric power. Consequently, the handset part 12 is only put off the board at the time of origination and termination to light a key operation part 9 and a display part 8 automatically, so the key operation is performed immediately even in the darkness, so that the display contents of the display part 8 can be confirmed.
HAGITANI SHINICHI
SHIRAI HIROSHI
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