| 摘要 |
<p>PURPOSE:To compact a dimming means and simplify dimming by varying the magnetic resistance through adjusting a varying/adjusting part for transformercores of a lighting circuit, changing the electromotive force of the secondary winding, and performing the dimming of each fluorescent lamp. CONSTITUTION:Fluorescent lamps 3-5 emit red, green, and blue light and connected with the secondary windings 8 of transformercores 2. These lamps are fitted in a fixture body mounted on a ceiling 40. A high frequency current flows through a cord 6 with actuation of a high frequency lighting circuit 1, and magnetic flux flows through each transformercore 2 so that an electromotive force is induced in the secondary winding 8, and the lamps 3-5 are high frequency lighted. The magnetic reluctance of each core 2 is varied by adjusting ots varying/adjusting part 7 to cause a change in the electromotive force induced in the winding 8, and the light fluxes of the lamps are changed to perform dimming.</p> |
