| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To independently turn on various combinations of lamp colors of a plurality of systems by one system control line. <P>SOLUTION: First switches 120 and 121 are connected between anodes of RGB light emitting elements connected in common by each of LED modules 105 and 106 provided with the RGB light emitting elements and a power supply terminal. The cathodes of the light emitting elements emitting light of the same color derived from each of the LED modules 105 and 106 are connected in common through resistors respectively and second switches 102, 103 and 104 are connected between the common connection point and a grounding terminal. A control section 101 performs ON/OFF control of the first switches 120 and 121 and the second switches 102, 103 and 104 according to the timing of repeating a pulse signal having a period to visually turn on the RGB light emitting elements of the LED modules 105 and 106 , so that the color to be turned on is individually controlled for each of the LED modules 105 and 106. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
