Electrical Testing for Panel Characterization and Defect Screening

A method comprising:

• programming display pixels of an electronic display with a plurality of test patterns;
• measuring resulting currents through pixel circuitry of the display pixels using test circuitry disposed in the electronic display;
• and
• identifying a presence or absence of vertical or horizontal cross talk based on the measurements.

A method comprising:

• applying a bias or stress, or both, to display pixels of an electronic display;
• measuring an aggregate current of all columns of the display pixels;
• and
• identifying a presence or absence of a defective pixel based on a presence of a current that is outside of a specification.

A method comprising:

• providing an enable signal to a source driver connected to a data line of an electronic display;
• testing the data line using test circuitry integral to the electronic display, wherein testing the data line comprises measuring a voltage from the source driver on the data line that changes over time;
• and
• identifying that the source driver has a non-TO defect in response to measuring substantially zero voltage after previously measuring a nonzero voltage.