Pixel driving circuit, driving method thereof and display device
A pixel driving circuit and circuit technology, applied in static indicators, instruments, etc., can solve the problems of poor brightness uniformity and Vth uniformity of light-emitting devices, etc.
Pending Publication Date: 2020-08-14
FUZHOU BOE OPTOELECTRONICS TECH CO LTD +1
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Problems solved by technology
[0003] However, in the existing low-temperature polysilicon process, the uniformity of the threshold voltage Vth between the driving transistors on the display substrate is poor, so when the same data voltage is input to the driving transistors, different threshold voltages of the driving transistors produce different Drive current, resulting in poor uniformity of brightness of the light emitting device
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[0049] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0050] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by those with ordinary skills in the field to which this disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity, or importance, but are only used to distinguish different components. Similarly, similar words such as "a", "one" or "the" do not mean a quantity limit, but mean that there is at least one. "Include" or "include" and other similar words mean that the element or item appearing before the word encompasses the element or item listed after the word and its equivalents, but does not exclude other elements or items....
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The invention provides a pixel driving circuit, a driving method thereof and a display device, and belongs to the technical field of display. The pixel driving circuit comprises a data writing sub-circuit, a driving transistor, an energy storage element, a threshold compensation sub-circuit, a light emitting control sub-circuit and a reset sub-circuit, wherein the data writing sub-circuit is configured to transmit a data voltage signal in response to a scanning signal, and charge the energy storage element through the data voltage signal; the threshold compensation sub-circuit is configured tocompensate the threshold voltage of the driving transistor by compensating a voltage signal and calling an energy storage element in response to the scanning signal; the light-emitting control sub-circuit is configured to respond to a light-emitting control signal, call the energy storage element and control the driving transistor to provide driving current for the light-emitting device; the reset sub-circuit is configured to discharge the energy storage element through an initialization signal in response to a reset signal.
Description
Technical field [0001] The invention belongs to the field of display technology, and in particular relates to a pixel driving circuit, a driving method thereof, and a display device. Background technique [0002] Active Matrix Organic Light Emitting Diode (Active Matrix Organic Light Emitting Diode, abbreviated as: AMOLED) is more and more widely used. AMOLED pixel display devices are organic light-emitting diodes (Organic Light-Emitting Diode, OLED for short). AMOLED can emit light by driving a thin film transistor to generate a driving current in a saturated state, and the driving current drives the light-emitting device to emit light. The existing basic pixel driving circuit uses a 2T1C circuit, which includes two thin film transistors (switching transistor T1 and driving transistor DTFT) and one storage capacitor Cst. [0003] However, due to the poor uniformity of the threshold voltage Vth between the driving transistors on the display substrate in the existing low-temperatur...
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IPC IPC(8): G09G3/3233
CPCG09G3/3233
Inventor 翁祖伟黄宇鹏许炜泽
Owner FUZHOU BOE OPTOELECTRONICS TECH CO LTD