| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED headlight light-control circuit capable of changing luminous intensity of headlight for a vehicle stepwise or at a speed in accordance with circumstances without giving discomfort to a visually recognizing person.SOLUTION: A control circuit and a driving part change and control an electric conduction state of a power MOS transistor M1 stepwise by changing a driving control signal given to a gate of the power MOS transistor M1. For example, when the control circuit is driven by using a first linear driving circuit LN11, the light emission luminous intensity of an LED module LM1 can be sharply changed. When the control circuit is driven by using a second linear driving circuit LN21, the light emission luminous intensity of the LED module LM1 can be moderately changed. |
