| 摘要 |
<p>PROBLEM TO BE SOLVED: To realize a lighting device which has two or more color renderings by an easy circuit composition and little wiring. SOLUTION: The lighting device is composed of a direct-current power supply for lighting an LED, a switching circuit for reversing the polarity of the direct- current power supply, a drive circuit for controlling an inversion timing, so- called a duty cycle, of the switching circuit, and an LED light source block connected which is connected with two-pole terminal of the above inversion. One to two or more LED of three colors are equipped in the light source block, respectively. Among the three colors, the one color which serves as the keynote is connected to the inversion terminals in both directions, and other two colors are oppositely connected, respectively, to the inversion terminals. Thereby, two or more color renderings are controlled remotely only by easy circuit composition and two power supply cables.</p> |
