Abstract: An integrated system for supplying direct current and brightness dimming for light emitting diodes (LEDs) comprising: an LED driver power supply for supplying a constant direct current; an array of one or more LEDs; and an integrated programmable LED current pulse width modulation (PWM) dimming controller; wherein the integrated programmable LED current pulse width modulation (PWM) dimming controller comprising: a front control panel for controlling the brightness of the array of one or more LEDs; and an LED current PWM dimming module.

Abstract: An LED current PWM dimming module comprising: an input voltage regulator for regulating the constant direct current supplied by the LED driver power supply in order to maintain a fixed and stable supply voltage source to a timer-oscillator and a DC-DC buck converter; the timer-oscillator for generating a repetitive square wave electrical output to be fed to the DC-DC buck converter; and the DC-DC buck converter for producing a driving pulse-width-modulated (PWM) current output to power one or more LEDs from the repetitive square wave electrical output; wherein the timer-oscillator receives a control signal from an external dimming controller and adjusts the repetitive square wave electrical output frequency and duty cycle accordingly; and wherein the driving PWM current output frequency and duty cycle being varied in an open-loop manner.

Abstract: An integrated system for supplying direct current and brightness dimming for light emitting diodes (LEDs) comprising: an LED driver power supply for supplying a constant direct current; an array of one or more LEDs; and an integrated programmable LED current pulse width modulation (PWM) dimming controller; wherein the integrated programmable LED current pulse width modulation (PWM) dimming controller comprising: a front control panel for controlling the brightness of the array of one or more LEDs; and an LED current PWM dimming module.