Pixel circuits and driving methods thereof, display devices
AssigneeKunShan Go-Visionox Opto-Electronics Co., Ltd
InventorsYanan JI, Wenzhi FAN
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Abstract
Exemplary embodiments of the application disclose pixel circuits and driving methods thereof, display devices. A pixel circuit includes a first through seventh thin film transistors, a light-emitting diode, and a storage capacitance. The pixel circuit provided by exemplary embodiments of the application can compensate a power voltage during a light-emitting stage of the light-emitting diode, so that the current flowing through the LED is related to a data voltage and a reference voltage input into the pixel circuit, and is independent of the power voltage, thereby effectively avoiding the problem of the display unevenness of the display device, due to the difference in the current flowing into the LED caused by the power voltage drop.
Claims16
A pixel circuit comprising:
- a first thin film transistor, a second thin film transistor, a third thin film transistor, a fourth thin film transistor, a fifth thin film transistor, a sixth thin film transistor, a seventh thin film transistor, a light-emitting diode, and a storage capacitance;
- wherein a gate of the first thin film transistor is respectively connected to a source of the second thin film transistor and one end of the storage capacitance, the other end of the storage capacitance is respectively connected to a drain of the third thin film transistor and a source of the fourth thin film transistor, a source of the third thin film transistor is connected to a data signal line, and a drain of the fourth thin film transistor is respectively connected to a drain of the fifth thin film transistor and a reference voltage signal line;
- a source of the first thin film transistor is connected to a drain of the sixth thin film transistor, and a source of the sixth thin film transistor is connected to a first power source;
- and
- a drain of the first thin film transistor is respectively connected to a drain of the second thin film transistor and a source of the seventh thin film transistor, a drain of the seventh thin film transistor is respectively connected to a source of the fifth thin film transistor and an anode of the light-emitting diode, and a cathode of the light-emitting diode is connected to a second power source.
Dependencies are inferred from the claim text.