Pixel circuit and display panel
AssigneeWuhan China Star Optoelectronics Technology Co., Ltd.
InventorsHaiming CAO, Chao TIAN
Life of this patent
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Abstract
A pixel circuit and a display panel related to the field of display technology are provided. The pixel circuit and the display panel include a driving transistor, a first transistor, a second transistor, a first capacitor, and a second capacitor. The pixel circuit and the display panel, before emitting light, preset an electric potential of a gate, a drain, and a source of a driving transistor. As a result, a light-emitting current passing the driving transistor can be immune from a threshold voltage of the driving transistor during luminescence, further eliminating an ununiform luminescence phenomenon due to a drift of the threshold voltage.
Claims19
A pixel circuit, comprising:
- a driving transistor in series with a light-emitting loop consisting of a first power signal and a second power signal and configured to control current flowing through the light-emitting loop;
- a first transistor in series between a drain of the driving transistor and a gate of the driving transistor and configured to control a transmitting path formed between the drain and the gate of the driving transistor according to a first scan signal;
- a second transistor connected to the gate of the driving transistor and one of a source or a drain of the first transistor and configured to write a data signal and an input reference signal according to a second scan signal to reset an electric potential of the gate of the driving transistor and an electric potential of a source of the driving transistor and compensate the electric potential of the source of the driving transistor through the transmitting path;
- a first capacitor in series between the gate of the driving transistor and the source of the driving transistor and configured to store the electric potential of the gate of the driving transistor;
- and
- a second capacitor in series between the source of the driving transistor and the first power signal and configured to regulate the electric potential of the gate of the driving transistor.
Dependencies are inferred from the claim text.