| 摘要 |
PURPOSE:To enable a dimmer operation using only a power source switch by changing brightness of a lighting apparatus and setting a lighting time with a short time off operation of the switch detected when the switch is turned on. CONSTITUTION:A power source supply circuit 52, pulse generation circuit 53, and dimmer control circuit 54 are provided in an upper part housing 11 of a lighting apparatus 10. An AC power source is made a full-wave rectification in the circuit 52, and is supplied to a computor 55 via a resistance R7, Zener ZD, and diode D3. The circuit 53 is composed of resistances R8 and R9, and gives an on/off signal S2 of the power source to the computor 55. A thyristor 56, buzzer 58, resistance, and condencer are equipped with the circuit 54 and the computor 55 as central parts. This constitution enables brightness of a lighting apparatus and a lighting time to be set by only a short time off operation of a power source switch 14. |
