| 摘要 |
PURPOSE:To provide a dimming control device capable of delicately coping with the luminous intensity of a lamp. CONSTITUTION:When the luminous intensity of a lamp is automatically set, conditions are set by a direction setting switch, a day/night setting switch, a cloud height setting switch, and a visible distance setting switch, and the luminous intensity is set to the most suitable value of five steps by a logical control device 3. When it is set to a value differed from the conditions, up- switches 76, 77, 78, 79, 80 and down-switches 86, 87, 88, 89, 90 are operated to control it stepwise. When a further fine control is conducted, wheels 81, 82, 83, 84, 85 are rotated, the pulse number is counted by an up-down counter 102, the phase control angle is continuously changed by an arithmetic processing part 103, and a TRIAC is controlled to the set phase control angle to light the lamp at a determined luminous intensity. |
