| 摘要 |
PURPOSE:To provide a product for flash control of an incandescent lamp, at low cost by leaving a half of the brightness at the time of turning out the light, and by simplifying a control circuit. CONSTITUTION:An SCR 2 and a rectifier device 3 are connected to one another in parallel so that the forward direction is in reverse, while one of the contact terminal of the SCR 2 and the rectifier device 3 is connected to an ac power source AC through an incandescent lamp 1, and the other directly to the ac power source AC. The SCR 2 is turned ON/OFF intermittently in a zero-cross point detection circuit storing mode by an initial condition setting circuit 8, an oscillating circuit 9, a driver 10, and by a photo coupler 11, and the illuminance of the incandescent lamp 11 is thus controlled. |
