| 摘要 |
PURPOSE:To eliminate variation in the intensity of a light emitting diode(LED) by providing a plurality of selectors for selecting a current of a value desired by an operator from basic different current values to be fed from a basic current setting circuit to send it to the LED. CONSTITUTION:One or more light emitting diodes 1, a plurality of basic current setting circuits 50 for sending different currents to the diodes 1, and a plurality of selectors 70 for selecting currents of values desired by an operator from basic different current values to be fed from the setting circuits 50 to send them to the diodes are provided. Accordingly, basic currents can be supplied from the setting circuits 50 to the LEDs 1, one basic current selected by the selector 70 is supplied to the LED 1, and the LED 1 is lit by the basic current. Thus, the intensity of the diode can be varied. |
