Pixel circuit for displaying gradation with accuracy and display device using the same

摘要

A pixel circuit is provided which includes a light-emitting element; a driving transistor configured to control an amount of current supplied from a first power line to the light-emitting element according to a pixel voltage; a capacitor having one end connected to a second power line and the other end connected to a gate of the driving transistor and configured to hold the pixel voltage; a first switch transistor configured to selectively switch the pixel voltage provided through a data signal line into the capacitor; and a second switch transistor configured to selectively connect the first power line and the second power line. The first and second power lines are separated during a period where the capacitor is charged by the pixel voltage, and are shorted during a period where the driving transistor operates according to the pixel voltage.

主权项

1. A pixel circuit, comprising:
a light-emitting element; a driving transistor to control an amount of current supplied from a first power line to the light-emitting element according to a pixel voltage; a capacitor to hold the pixel voltage, the capacitor having one end connected to a second power line and another end connected to a gate of the driving transistor; a first switch transistor to supply the pixel voltage provided through a data signal line to the capacitor when the first switch transistor is turned on by a first control signal; and a second switch transistor to electrically connect the first power line and the second power line when the second switch transistor is turned on by a second control signal, wherein the first and second switch transistors are turned on at different times which do not overlap one another, and wherein an end of the first control signal synchronizes with a start of the second control signal.