| 摘要 |
<p>A lighting system comprises a plurality of lighting units (1, 4) each configured to light a target area. A central dimming element having an adjustable conductance is provided. Each lighting unit comprises at least one light source (101, 201), a controllable light source driver (2, 5) coupled to the light source (101, 201), and a light sensor (3, 6) configured to measure a light flux in the target area of the lighting unit (1, 4). The light source driver supplies power to the light source in accordance with an input control voltage generated by a current source. The light sensor is coupled to the current source, and has a variable conductance corresponding to the light flux. The lighting units (1, 4) can be dimmed in combination by coupling each light sensor (3, 6) in parallel to the dimming element (7) through a respective diode (9, 10, 13).</p> |
