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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 the problems of uneven display, affecting the display effect, affecting the luminous brightness of light-emitting elements, etc., and achieve the effect of improving the retention rate and stabilizing the driving current

Active Publication Date: 2021-10-26
WUHAN TIANMA MICRO ELECTRONICS CO LTD +1
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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 herein 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, the drawings only show some but not all structures related to the present invention.

[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 luminous brightness o...

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Abstract

The embodiment of the present invention discloses a pixel driving circuit and its driving method, a display panel, and a display device. The pixel driving circuit includes an initialization unit, a data writing unit, a threshold compensation unit, a light emission control unit, a voltage stabilizing unit, a storage capacitor, The drive transistor and the light-emitting element; the initialization unit is electrically connected between the initialization signal terminal and the first node; the data writing unit is electrically connected between the data signal terminal and the first electrode of the drive transistor; the gate of the drive transistor and the storage capacitor The first end is electrically connected to the second node; the second end of the storage capacitor is electrically connected to 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 unit is electrically connected to the first Between the node and the second node; the lighting control unit is electrically connected between the power signal terminal and the light emitting element. The technical method provided by the embodiment of the present invention can solve the problem of display unevenness caused by electric leakage, thereby improving the display effect.

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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Patent Type & Authority Patents(China)
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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