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Pixel driving circuit, driving method and display panel

A pixel driving circuit and driving signal technology, applied in static indicators, instruments, etc., can solve problems such as poor OLED panels, increase process difficulty, affect image quality, etc., and achieve the effect of improving display characteristics and reducing metal wiring.

Active Publication Date: 2018-12-18
WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to long-term operation, the threshold voltage Vth of the driving thin film transistor A2 will drift, which will lead to changes in the driving current of the light-emitting element OLED, which will cause defects in the OLED panel and affect the image quality.
[0004] In addition, various companies have proposed a variety of pixel drive circuits that compensate for threshold voltage drift. However, it will greatly increase the complexity of the metal wiring on the display panel and increase the difficulty of the process.

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

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Embodiment Construction

[0051] The liquid crystal display assembly provided by the embodiment of the present invention has been introduced in detail above. The principles and implementation modes of the present invention are explained by using specific examples in this paper. The description of the above embodiments is only for helping to understand the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be construed as limiting the present invention. The following descriptions of the various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [top], [bottom], [front], [back], [left], [right], [inside], [outside], [side], etc., are only for reference The orientation of th...

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Abstract

The invention provides a pixel driving circuit, a driving method and a display panel. The pixel driving circuit includes a reset module, a compensation module, and a light emitting module, wherein thereset module is used for receiving a first driving signal, and transmits the data signal to the compensation module under the control of the first driving signal so as to reset the compensation module; the compensation module is used for receiving a second driving signal, and writing in the data signal under the control of the second driving signal and carrying out threshold voltage compensation;the light emitting module is used for receiving a third driving signal and sending light under the control of the third driving signal. By means of the mode, the threshold voltage can be compensated,the metal wiring on the display panel is reduced, and therefore the display characteristic of the display panel is improved.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel driving circuit, a driving method and a display panel. Background technique [0002] Organic Light Emitting Diodes (OLEDs) have a wide color gamut, high contrast ratio, energy saving, and foldability, making them highly competitive in next-generation displays. Among them, active matrix organic light emitting diode (AMOLED) technology is one of the key development directions of flexible display. [0003] The basic driving circuit of AMOLED such as figure 1 As shown, it is a 2T1C mode, that is, it includes two thin film transistors and a storage capacitor, specifically, it includes a switching thin film transistor A1, a driving thin film transistor A2 and a storage capacitor C1. The driving current of the light-emitting element OLED is controlled by the driving thin film transistor A2, and its current size is: I OLED =k(V gs -V th ) 2 ; Wherein, k is the curr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3258
CPCG09G3/3258G09G3/3233G09G3/3291G09G2300/0819G09G2300/0852G09G2300/0861G09G2310/0262G09G2310/08G09G2320/0233G09G2320/043
Inventor 陈涛李骏
Owner WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD