OLED voltage driver with current-voltage compensation

A method comprising:

• setting, via reference array control circuitry of an electronic display, a power supply voltage level of a reference pixel in a reference array of the electronic display based at least in part on a temperature change;
• determining, via the reference array control circuitry, a current-voltage curve based at least in part on a set of current and voltage values;
• determining, via the reference array control circuitry, a first set of gamma tap points based at least in part on the current-voltage curve;
• determining, via the reference array control circuitry, one or more voltage compensation values based at least in part on the temperature change;
• determining, via the reference array control circuitry, one or more current compensation values based on the one or more voltage compensation values;
• limiting, via the reference array control circuitry, the one or more current compensation values below a visibility threshold;
• and
• displaying, via an active array control circuitry, image data based at least in part on the first set of gamma tap points and the one or more limited current compensation values.

An electronic display comprising:

• a reference array comprising:
• a first pixel comprising a first diode;
• an analog-to-digital converter coupled to the first diode and configured to receive an analog current provided to the first diode and convert the analog current to a digital current signal;
• comparison circuitry coupled to the analog-to-digital converter and configured to compare the digital current signal to a reference current and generate a difference signal associated with a difference between the digital current signal and the reference current;
• and
• voltage level search circuitry coupled to the comparison circuitry and configured to receive the difference signal and determine a voltage level to be applied to the first pixel that generates the reference current at a target brightness setting;
• and
• an active array comprising:
• a second pixel comprising a second diode;
• and
• control circuitry configured to:
• determine a current compensation value based on the difference signal;
• limit the current compensation value below a visibility threshold;
• and
• drive the second pixel based on the limited current compensation value.