Patent ID: RE45291

Claim:
A system for programming at least one pixel circuit in a display, the system comprising: a voltage driver for generating a current or a voltage to apply to a data node of the at least one pixel circuit to thereby program the at least one pixel circuit according to the generated current or voltage; a programmable current source for providing a first current and a second current to apply to the data node of the at least one pixel circuit; a sampler for reading a first voltage on the data node while the first current is maintained through the at least one pixel circuit via the programmable current source and for reading a second voltage on the data node while the second current is maintained through the at least one pixel circuit via the programmable current source; and a controller configured to: generate a voltage versus current relationship for the at least one pixel circuit based on the first current and the second current and based on the sampled first and second voltages, extract, based on the voltage versus current relationship for the at least one pixel circuit, a voltage corresponding to a zero current level, and program the at least one pixel circuit via the data node with a programming current or voltage generated by the voltage driver that is set according to display data and according to the extracted voltage corresponding to the zero current level.