| 摘要 |
PROBLEM TO BE SOLVED: To simplify the circuit constitution of an LED lighting control circuit. SOLUTION: One end of a resistor 51 is connected to a 24-V power source and the other end of the resistor 51 is connected to the LED 52 of the first stage of plural red color LEDs 52 and to the LED 53 of the first stage of plural green color LEDs 52. Plural the red color LEDs are connected in series and a resistor 54 and a transistor 55 are connected in series with the plural red color LEDs 52. Moreover, the plural green color LEDs are connected in series and a resistor 56 and a transistor 57 are connected in series with the plural green color LEDs 53.
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