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Pixel driving circuit and driving method thereof, display panel and display device

A pixel drive circuit and drive transistor technology, applied in the drive field, can solve problems such as uneven display, affecting the luminous brightness of light-emitting elements, and affecting display effects, etc.

Active Publication Date: 2020-02-04
WUHAN TIANMA MICRO ELECTRONICS CO LTD
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Problems solved by technology

[0005] Embodiments of the present invention provide a pixel driving circuit and its driving method, a display panel, and a display device, so as to solve the problem in the prior art that the gate voltage of the driving transistor changes due to the influence of the leakage current, which affects the luminous brightness of the light-emitting element. Technical problems that cause uneven display and affect the display effect

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  • Pixel driving circuit and driving method thereof, display panel and display device
  • Pixel driving circuit and driving method thereof, display panel and display device
  • Pixel driving circuit and driving method thereof, display panel and display device

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0030] As mentioned in the background art, the pixel driving circuit with compensation function in the prior art, such as 7T1C (seven transistors and one capacitor) pixel driving circuit, due to the characteristics of the transistor itself, the transistor will still have a small amount when it is turned off. Therefore, after the initialization phase is over, there will still be an initialization signal written into the gate of the drive transistor, reducing the gate voltage of the drive transistor, so that the lumi...

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Abstract

The embodiment of the invention discloses a pixel driving circuit and a driving method thereof, a display panel and a display device. The pixel driving circuit comprises an initialization unit, a datawriting unit, a threshold compensation unit, a light emitting control unit, a voltage stabilizing unit, a storage capacitor, a driving transistor and a light emitting element; the initialization unitis electrically connected between the initialization signal end and the first node; the data writing unit is electrically connected between the data signal end and the first electrode of the drivingtransistor; the grid electrode of the driving transistor and the first end of the storage capacitor are electrically connected to a second node; the second end of the storage capacitor is electricallyconnected with the power signal end; the threshold compensation unit is electrically connected between the second electrode of the driving transistor and the second node; the voltage stabilizing unitis electrically connected between the first node and the second node; the light-emitting control unit is electrically connected between the power supply signal end and the light-emitting element. According to the technical method provided by the embodiment of the invention, the problem of non-uniform display caused by electric leakage can be solved, so that the display effect is improved.

Description

technical field [0001] The present invention relates to the field of driving technology, in particular to a pixel driving circuit and a driving method thereof, a display panel and a display device. Background technique [0002] Organic Light Emitting Diode (OLED) displays have the advantages of self-illumination, low driving voltage, high luminous efficiency, short response time, flexible display, etc., and become the display with the most development potential at present. [0003] The OLED element of the OLED display is a current-driven element, and a corresponding pixel driving circuit needs to be provided to provide a driving current for the OLED element so that the OLED element can emit light. A pixel driving circuit of an OLED display generally includes a driving transistor, a switching transistor and a storage capacitor. The driving transistor can generate a driving current for driving the OLED element according to the voltage of its gate. However, due to reasons such...

Claims

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Application Information

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IPC IPC(8): G09G3/3225G09G3/3258
CPCG09G3/3225G09G3/3258
Inventor 欧阳珺婷席克瑞林柏全孔祥梓
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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