Pixel drive circuit and display panel
AssigneeShenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
InventorsBo YANG, Pengfei LIANG
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Abstract
A pixel drive circuit and a display panel are provided. The pixel drive circuit includes a reference voltage input module for inputting a reference voltage and for controlling the light-emitting module not to emit light, a light-emitting module for emitting light, a sensing module for sensing a threshold voltage of the light-emitting module, a storage capacitor module storing the threshold voltage of the light-emitting module, and a digital signal input module for inputting a data signal. The pixel drive circuit can improve uniformity of the picture and achieve high contrast at the same time, and the display effect is improved.
Claims20
A pixel drive circuit comprising:
- a reference voltage input module configured to input a reference voltage to a first node under a control of a first control signal in a first working state;
- a light-emitting module connected to the reference voltage input module through the first node, and being configured to emit light under controls of a second control signal and a potential at the first node;
- a sensing module connected to the light-emitting module through a second node, and being configured to sense a threshold voltage of the light-emitting module under a control of a third control signal;
- a storage capacitor module connected to the light-emitting module through the first node, the second node and a third node, and being configured to store the threshold voltage of the light-emitting module;
- and
- a digital signal input module connected to the reference voltage input module and the light-emitting module through the first node, and being configured to input a data signal to the first node under a control of a fourth control signal in a second working state;
- wherein the reference voltage input module is further configured to input the reference voltage to the first node under the control of the first control signal in a third working state after the light-emitting module emits light, so as to control the light-emitting module not to emit light.
A display panel comprising a pixel drive circuit, the pixel drive circuit comprising:
- a reference voltage input module configured to input a reference voltage to a first node under a control of a first control signal in a first working state;
- a light-emitting module connected to the reference voltage input module through the first node, and being configured to emit light under controls of a second control signal and a potential at the first node;
- a sensing module connected to the light-emitting module through a second node, and being configured to sense a threshold voltage of the light-emitting module under a control of a third control signal;
- a storage capacitor module connected to the light-emitting module through the first node, the second node and a third node, and being configured to store the threshold voltage of the light-emitting module;
- and
- a digital signal input module connected to the reference voltage input module and the light-emitting module through the first node, and being configured to input a data signal to the first node under a control of a fourth control signal in a second working state;
- wherein the reference voltage input module is further configured to input the reference voltage to the first node under the control of the first control signal in a third working state after the light-emitting module emits light, so as to control the light-emitting module not to emit light.
Dependencies are inferred from the claim text.