Display With Threshold Voltage Compensation Circuitry

摘要

A display may have an array of organic light-emitting diode display pixels. Each display pixel may have a light-emitting diode that emits light under control of a drive transistor. Each display pixel may also have control transistors for compensation and programming operations. Each display pixel may have five p-type transistor and two capacitors. One of the five p-type transistors may serve as the drive transistor and may be compensated using the remaining four of the p-type transistors and the two capacitors. A first of the capacitors may be coupled between the gate and source of the drive transistor. A second of the capacitors may have a terminal coupled to the source. Alternatively, each display pixel may have six p-type transistors and a single capacitor. The six p-type transistors may include a drive transistor having a gate coupled to the capacitor.

主权项

1. A display pixel, comprising:
an organic light-emitting diode; first, second, third, fourth, and fifth transistors, wherein the second transistor is a drive transistor that has a threshold voltage and that supplies a current to the organic light-emitting diode; and first and second capacitors, wherein the first, third, fourth, and fifth transistors receive control signals during operation of the display pixel that compensate for variations in the threshold voltage of the drive transistor.