Display backlighting systems and methods having current mirror based display drivers to improve pulse width modulation resolution

A computer implemented method for operating a display of an electronic device, comprising:

• generating, with a light-emitting diode (LED) circuit of the display, a first pulse-width modulated (PWM) signal to control a first current mirror branch of a first driver stage;
• and
• generating a second PWM signal to control a second current mirror branch of a second driver stage to provide an extra N bits of resolution for controlling a plurality of light-emitting diodes of the LED circuit.

Backlight circuitry, comprising:

• a plurality of light-emitting diodes to generate backlight for a display;
• and
• first and second driver circuits coupled to the plurality of light-emitting diodes, wherein the first driver circuit is configured to receive a first pulse-width modulated (PWM) signal to control a first current mirror branch and the second driver circuit to receive a second PWM signal to control a second current mirror branch to provide an extra N bits of resolution for controlling the plurality of the light-emitting diodes.

An electronic device with a display, the display comprising:

• a channel of light-emitting diodes;
• and
• current mirror circuitry coupled to the channel of light-emitting diodes, wherein the current mirror circuitry has N branches and the current mirror circuitry is configured to receive a first pulse-width modulated (PWM) signal to control a first current mirror branch and to receive a second PWM signal to control a second current mirror branch for controlling the channel of the light-emitting diodes.