| 摘要 |
<p>PROBLEM TO BE SOLVED: To independently set two or more output adjustment points with a simple circuit structure by providing a dimming function capable of changing the light output in response to the dimming signal fed from the outside. SOLUTION: This lighting system is provided with a first control circuit 1 converting the dimming signal S(x) into the first level signal A(x), an output circuit 4 outputting the output of the first control circuit 1 at an optional operating point (x=x1) of the dimming signal S(x) as the second level signal A(x1), a second control circuit 2 outputting a third level signal B(x) corresponding to the difference between the first level signal A(x) and the second level signal A(x1), and a third control circuit 3 converting the third level signal B(x) into the control signal C(x) for controlling the light output.</p> |
