Programmable current PWM dimming controller
AssigneeGRE Alpha Electronics Ltd. Institute Company Limited
InventorYik Lun Chu
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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.
Claims3
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 comprising:
- a front control panel for controlling the brightness of the array of one or more LEDs;
- and
- an LED current PWM dimming module;
- wherein the front control panel is secured to the LED current PWM dimming module by a slot-in interface on the LED current PWM dimming module;
- and
- wherein the LED current PWM dimming module comprises:
- an input voltage regulator;
- an over current protection circuit;
- an over temperature protection circuit;
- a microcontroller for generating a pulse-width modulated current;
- a direct current-to-direct current (DC-DC) buck converter for stepping down the pulse-width modulated current to establish a maximum LED-feeding current to said array of one or more LEDs;
- and
- a current selector, coupled to the DC-DC buck converter, for selecting amount of LED-feeding current step down in the DC-DC buck converter.
Dependencies are inferred from the claim text.