Pixel circuit and OLED display panel

A pixel circuit and circuit technology, applied in static indicators, instruments, etc., can solve the problems of short lifespan of OLED panels, and achieve the effect of alleviating electrochemical performance drift and improving short lifespan

Inactive Publication Date: 2019-07-26
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a pixel circuit and an OLED display panel to solve the problem of short service life of the existing OLED panel

Method used

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  • Pixel circuit and OLED display panel
  • Pixel circuit and OLED display panel
  • Pixel circuit and OLED display panel

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Embodiment Construction

[0032] The technical solutions in the embodiments and / or examples of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention. Obviously, the embodiments and / or examples described below are only part of the implementation of the present invention. schemes and / or examples, rather than all implementations and / or examples. Based on the implementations and / or examples in the present invention, all other implementations and / or examples obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0033] The directional terms mentioned in the present invention, such as [top], [bottom], [left], [right], [front], [back], [inside], [outside], [side], etc., are only for reference The orientation of the attached schema. Therefore, the directional terms used are used to illustrate and understand the present invention, but not to limit the pr...

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Abstract

The invention provides a pixel circuit and an OLED display panel. The pixel circuit comprises: driving circuits; light-emitting circuits which are arranged in one-to-one correspondence with the driving circuits, wherein each light-emitting circuit comprises a first electrode and a second electrode, and the voltage of the first electrodes is larger than that of the second electrodes within the display time of the display frame period;a delay circuit which is used for providing delay voltage for at least one of the first electrode and the second electrode within first preset time of the displayframe period, so as to enabling the voltage of the first electrode to be smaller than that of the second electrode within first preset time of the display frame period, wherein the first preset timeis located within non-display time of the display frame period. The current flow directions of the two ends of the light-emitting device OLED are changed within the first preset time, that is, the light-emitting device OLED is placed in the reverse bias state, the electron state is recovered, electrochemical performance drift of the light-emitting device OLED is relieved, and then the problem thatthe service life of the light-emitting device OLED is short is solved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a pixel circuit and an OLED display panel. Background technique [0002] The existing AMOLED (Active Matrix Organic Light Emitting Diode, Active Matrix Organic Light Emitting Diode) display panel is widely used because it is lighter and thinner than the liquid crystal display panel. [0003] At present, the development of large-size AMOLED panels usually adopts such as figure 1 The shown 3T1C pixel circuit architecture, in a display frame period, such as figure 2 As shown, first the scanning line and the sensing line input high voltage, the first switching transistor T1 and the second switching transistor T2 are turned on, the gate voltage Vg of the driving transistor T3 is written into the data voltage Vdata, and the output voltage Vs of the driving transistor T3 is written into The reference voltage Vref, after which the scanning line and the sensing line are switched back ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3225G09G3/3233
CPCG09G3/3225G09G3/3233
Inventor 蔡振飞曹昆
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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