Patent ID: 6888529

Claim:
A LED backlight for an LCD display, comprising: a primary circuit for generating a primary voltage; a first secondary circuit coupled to said primary circuit for receiving a first secondary voltage as a function of the primary voltage, said first secondary circuit including a first sub-array of LEDs of a first color, a first sub-array switch operable in a first ON state for allowing a flow of a first LED current through said first sub-array of LEDs, the first LED current being a function of said first secondary voltage, and a first sub-array controller for controlling an operation of said first switch in the first ON state; and a second secondary circuit coupled to said primary circuit for receiving a second secondary voltage as a function of the primary voltage, said second secondary circuit including a second sub-array of LEDs of a second color, a second sub-array switch operable in a second ON state for allowing a flow of a second LED current through said second sub-array of LEDs, the second LED current being a function of said second secondary voltage, and a second sub-array controller for controlling an operation of said second switch in the second ON state, wherein said first sub-array controller controls the operation of said first sub-array switch in the first ON state and said second sub-array controller controls the operation of said second sub-array switch in the second ON state in a mutually exclusive manner.