| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an electric lamp having a dimming function composed of LEDs, excellent in light conversion efficiency, small in power consumption and having a long service life because an incandescent lamp or the like used in a shop or a general house and having a dimming function has much loss in terms of thermal efficiency and power consumption to increase electricity charges, has a problem where the life of the lamp is short and replacement frequency is increased; and an electric lamp using LEDs having solved the problem can be used for a dimming facility but the dimming function cannot be achieved. <P>SOLUTION: This dimming function is achieved by connecting a plurality of LEDs to outputs of an A/D converter and an AND/OR circuit, and by controlling the quantity of the LEDs to be lit. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
