Patent ID: 8581828

Claim:
A liquid crystal display, comprising: backlight circuitry comprising a set of light emitting diodes (LEDs), wherein the set of LEDs are arranged in a plurality of strings of one or more LEDs; a controller that receives a load metric that establishes load of the backlight circuitry, that receives an error value as an input, and that supplies a control signal value based on the load metric and also based on the error value, the controller comprising a plurality of compensation blocks, wherein a compensation block configures the control signal value; power supply circuitry that receives the control signal value and regulates a voltage supplied to the backlight circuitry; an efficiency regulator coupled to the backlight circuitry for monitoring one or more string voltages of one or more strings of the plurality of strings to determine a reference value based on the one or more string voltages; and an error circuit that generates the error value as a difference between the reference value and a voltage value of the voltage supplied to the backlight circuitry.