Patent ID: 9368063
Filing Date: 2016-06-14
CPC Classification: G09G

Claim Text:
1. A method of extracting a propagation delay effect in a display system having a pixel circuit to allow the pixel circuit sufficient time during a programming budget to settle, the pixel circuit having a light emitting device driven by a driving transistor, the pixel circuit connected to a signal line for providing programming information to the pixel circuit for influencing the current through the driving transistor and a monitor line for measuring current levels through at least the driving transistor, the method comprising: first programming the pixel circuit with a first time duration sufficient to avoid settling effects on the signal line; responsive to the first programming, measuring, from the monitor line, a current from the pixel circuit to produce a first measurement; second programming the pixel circuit with a second time duration different from the first time duration; responsive to the second programming, measuring, from the monitor line, a current from the pixel circuit to produce a second measurement; comparing the first measurement and the second measurement to extract a propagation delay effect on the signal line; and storing a representation of the extracted propagation delay effect in a memory device.