Patent ID: 9135855
Filing Date: 2015-09-15
Classification: G09G

Abstract:
1. A display device, comprising: a pixel circuit including a light emitting diode that emits light according to a supplied current; and a driver circuit to drive the pixel circuit such that the light emitting diode emits light, wherein the pixel circuit further includes: a constant current circuit including a first transistor to control an amount of the supply current to the light emitting diode and a capacitive element connected to a gate terminal of the first transistor; and a switch circuit including a second transistor to select whether to switch the supply current and a fourth transistor between a data line and a gate terminal of the second transistor and having a gate terminal connected to a third signal line, the first and second transistors being connected in series between a first power line and an anode of the light emitting diode having a cathode connected to a second power line, wherein the driver circuit controls the pixel circuit such that the light emitting diode emits light by: connecting the anode of the light emitting diode and the first power line under a non-light emission state of the light emitting diode, connecting the gate terminal of the first transistor and the anode after the anode is disconnected from the first power line, setting the gate terminal of the first transistor to a voltage corresponding to the amount of the supply current by connecting the gate terminal of the first transistor and the first power line, and, after setting the gate terminal, switching the supply current through the second transistor under a light emission state of the light emitting diode.