Control and drive circuit arrangement for illumination performance enhancement with LED light sources

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.