DEVICE FOR CONTROLLING LED INDICATORS USED FOR AIRCRAFT PANEL ILLUMINATION Russian patent published in 2017 - IPC H05B33/08 

FIELD: lighting.

SUBSTANCE: device contains an analog adder, the output of which is connected to the PWM input of the controller, the PWM output of the controller is connected to the PWM amplifier, which consists of an electronic switch on the field effect transistor for supplying the LED node from below and a current stabiliser for supplying the LED node from above; wherein the current stabiliser consists of a current controller controlled by a photosensor which, as control feedback on the brightness of the luminescence of one of the node LEDs, controls the amount of current passing through the LEDs to maintain the required level of LED luminescence, wherein the external control input is connected to the analog adder.

EFFECT: providing and maintaining the lighting characteristics of the LEDs at a selected brightness level in the range from 0 to 100 percent and changing linearly, in proportion to the magnitude of the control input voltage, ensuring a stable current through the LEDs regardless of the ambient temperature and the duration of the LED crystal operating time.

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