Smart talk backlighting system and method

1. A circuit to drive a backlight for a display comprising:

a backlight device driver;

a DC-to-DC converter; and

a smart talk mechanism to feed back adjustment information from the driver to the DC-to-DC converter, thereby enabling the DC-to-DC converter to adjust an input voltage for at least one illumination source backlighting the display for increasing the power efficiency;

wherein the smart talk mechanism uses a voltage at the device driver to determine the adjustment information;

wherein the backlight device drives at least one LED for the backlight, the feedback mechanism reducing the voltage at a cathode of the LED;

wherein the reduction of the cathode voltage is done by continuously adjusting an anode voltage;

wherein the driver output is used to produce the adjustment information and feed that back to the DC-to-DC converter; and

wherein if the anode voltage is high, then the DC-to-DC converter will decrease its output to lower the cathode voltage and hence lower the anode voltage as well, if the anode voltage is low, then the DC-to-DC converter will increase its output to raise the cathode voltage and hence raise the anode voltage as well.

2. The circuit of claim 1 , wherein the backlight device driver drives the light emitting diode (LED) back light for a liquid crystal display (LCD).

3. The circuit of claim 1 , wherein the display includes a liquid crystal display (LCD).

4. The circuit of claim 1 , wherein the driver comprises a multi-channel driver.

5. The circuit of claim 1 , wherein the DC-to-DC converter adjusts a voltage to the backlight of the display.

6. The circuit of claim 1 , wherein input power is derived from at least one of a battery and an AC adapter.

7. The circuit of claim 1 , wherein the DC-to-DC converter comprises a pulse width modulator (PWM).