| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an LED lighting circuit which can perform light emission of LEDs (light emitting diodes) in a plurality of modes through simple and inexpensive circuitry. <P>SOLUTION: A diode bridge circuit is constituted by arranging LEDs 11-14 on four sides, respectively, input terminals A1 and A2 of a DC power supply are connected with a pair of opposing joints 21 and 22, respectively, a pair of other joints 23 and 24 are connected to be short-circuited, a first resistor 15 is connected to a first current path IR1 when the DC power supply is applied using the input terminal A1 as a plus terminal and the input terminal A2 as a minus terminal, and a second resistor 16 having a resistance different from that of the first resistor 15 is connected to a second current path IR2 when the DC power supply is applied using the input terminal A2 as a plus terminal and the input terminal A1 as a minus terminal. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
