Patent ID: 9165508
Filing Date: 2015-10-20
Classification: G09G

Abstract:
1. A display apparatus comprising: a plurality of pixel circuits; a reference voltage line connected to each of the plurality of pixel circuits; a reference voltage source for supplying a reference voltage to the reference voltage line; a first switch for connecting the reference voltage source to the reference voltage line; and a data line for supplying a data voltage to each pixel circuit, and the data line being different from the reference voltage line, wherein each pixel circuit includes a light emitting element, a driving transistor having a source connected to an anode of the light emitting element, a holding capacitor having one end connected to a gate of the driving transistor and having the other end connected to the source of the driving transistor, a second switch for connecting the gate of the driving transistor to the data line, and a third switch for connecting the source of the driving transistor to the reference voltage line; and wherein the data voltage is written in the gate of the driving transistor, under a condition that the source of the driving transistor is connected to the reference voltage line, while the reference voltage line is disconnected from the reference voltage source, and that a threshold voltage of the driving transistor is held in the holding capacitor, while a difference of the reference voltage from the threshold voltage of the driving transistor is held in the parasitic capacitance of the reference voltage line.