Patent ID: 8963811
Filing Date: 2015-02-24
Classification: G09G,H05B

Abstract:
1. A method of driving LEDs, comprising the steps of: connecting an array of LEDs to an integrated driver circuit, wherein the integrated driver circuit comprises a phase lock loop, a plurality of pulse width modulation engines, a configuration register, a plurality of gain adjustable fast charge current sources, and a serial input/output interface, wherein the LED array comprises columns of red, green, and blue LEDs having their anodes connected to red, green, and blue common anode nodes respectively, and the integrated driver circuit comprises a plurality of power sources; operatively connecting a power source to a common anode node; setting the voltage of the power source connected to a red common anode node at 1.8 volts to 2.6 volts; and setting the voltage of the power source connected to a green common anode node or a blue common anode node at 2.6 volts to 3.8 volts; providing a global clock signal with the phase lock loop; storing driver circuit settings in a SRAM; loading driver circuit settings into the configuration register; loading gray scale values and the global clock signal to the pulse width modification engine; generating PWM signals for the plurality of gain adjustable fast charge current sources; loading DOT correction settings into a memory within a gain adjustable fast charge current source circuit; and providing a stable current to the LEDs based on pulse-width modification engines output signal.