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

A technology of a pixel driving circuit and a driving method is applied in the fields of driving methods, display panels and display devices, and pixel driving circuits, and can solve the problems of uneven display brightness of the display device, affecting the display effect of the display device, etc., and achieve good display effect and work. The current remains stable and the display brightness is uniform

Active Publication Date: 2016-07-27
SHANGHAI TIANMA MICRO ELECTRONICS CO LTD +1
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Problems solved by technology

However, due to reasons such as technological process and device aging, there will be inconsistencies in the threshold voltage Vth of the driving transistors of multiple pixel driving circuits, which will cause the current flowing through the light-emitting diode of each pixel to change, so that The display brightness of the display device is uneven, which further affects the display effect of the display device

Method used

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

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Embodiment Construction

[0042] 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.

[0043] As mentioned in the background art, unlike liquid crystal display devices that use a stable voltage to control brightness, organic light emitting diode display devices are driven by current and require a stable current to control light emission. However, due to reasons such as technological process and device aging, there will be inconsistencies in the threshold voltage Vth of the driving transistors of multiple pixel driving circuits, which will cause t...

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Abstract

The invention provides a pixel driving circuit, a driving method, a display panel and a display device.The pixel driving circuit is used for driving a light-emitting element and comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a drive transistor and a capacitor, wherein driving current provided by the light-emitting element is irrelevant to threshold voltage of the drive transistor through coordination of the transistors and the capacitor in the pixel driving circuit, so that influence on the light-emitting element is avoided, operating current of the light-emitting element is kept stable, and display brightness uniformity and good display effect of the display device are guaranteed.

Description

technical field [0001] The present invention relates to the field of display technology, and more specifically, to a pixel driving circuit, a driving method, a display panel and a display device. Background technique [0002] With the continuous development of multimedia, organic light emitting diode (Organic Light Emitting Diode, OLED) display device has attracted attention in the display device market due to its simple structure and excellent advantages of operating temperature, contrast, and viewing angle. Organic light emitting diode display devices include passive matrix OLED display devices and active matrix OLED display devices, and active matrix OLED display devices are widely used due to low power consumption. Unlike liquid crystal display devices that use a stable voltage to control brightness, organic light emitting diode display devices are driven by current and require a stable current to control light emission. However, due to reasons such as technological pro...

Claims

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Application Information

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IPC IPC(8): G09G3/3233
CPCG09G3/3208
Inventor 吴天一
Owner SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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