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

A pixel driving circuit and circuit technology are applied in the field of pixel driving circuit and driving method thereof, display panel and display device, and can solve the problems of uneven display brightness, affecting image display effect, uneven threshold voltage, etc.

Active Publication Date: 2021-03-12
BOE TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, due to reasons such as technological process and device aging, there will be non-uniformity in the threshold voltage of the driving transistor of the pixel driving circuit, which will lead to changes in the current flowing through the light-emitting device connected to the pixel driving circuit, making the display brightness uneven
Moreover, as the size of the OLED display panel becomes larger and larger, the IR Drop (IR voltage drop) problem becomes more and more serious, which will also make the display brightness uneven, thereby affecting the display effect of the entire image

Method used

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

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Embodiment Construction

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] An embodiment of the present invention provides a display device, including a display panel. The display panel includes a pixel driving circuit.

[0037] Such as figure 1 As shown, the display panel has a display area (active area, AA area for short) and a peripheral area S. The peripheral area S is, for example, provided around the area AA. A plurality of sub-pixels P are arranged in the above-mentioned AA area.

[0038] It should be noted, figure...

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Abstract

The embodiment of the invention provides a pixel driving circuit and a driving method thereof, a display panel and a display device, relates to the technical field of display, and can perform threshold voltage compensation and eliminate IR voltage drop. The pixel driving circuit comprises a first reset sub-circuit which enables an initial signal end to reset a first node under the control of a signal of a first signal end; a data writing sub-circuit comprises a first transistor of which the grid electrode and the second electrode are electrically connected with the first node, writes the datavoltage of the data signal end and the threshold voltage of the first transistor into the first node under the control of the signal of the second signal end, and compensates the threshold voltage forthe driving transistor in the driving sub-circuit; a second reset sub-circuit enables the reference signal end to reset the second node under the control of the third signal end; and a light-emittingcontrol sub-circuit enables the driving transistor to be connected with the first voltage end under the control of the fourth signal end so as to drive the light-emitting device connected with the second node to emit light through the driving transistor.

Description

technical field [0001] The present invention relates to the field of display 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 (Organic Light Emitting Diode, OLED) display panel has the advantages of low energy consumption, low production cost, self-illumination, wide viewing angle and fast response speed, etc., and is one of the hotspots in the current research field. Among them, the pixel drive circuit design is the core technical content of the OLED display panel, which has important research significance. [0003] However, due to reasons such as technological process and device aging, there will be non-uniformity in the threshold voltage of the driving transistor of the pixel driving circuit, which will lead to changes in the current flowing through the light-emitting device connected to the pixel driving circuit, making the display brightnes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3291G09G3/3258
CPCG09G3/3258G09G3/3291G09G2320/0233
Inventor 董甜
Owner BOE TECH GRP CO LTD
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