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

A pixel circuit and driving method technology, which is applied in the field of flat panel display, can solve problems such as difficult application, and achieve the effects of maintaining stability, suppressing current changes, and improving display effects

Active Publication Date: 2018-11-16
KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of technology, users have higher and higher requirements for resolution. Resolution can be measured by PPI (pixels per inch, pixels per inch). With the increase of PPI, it is necessary to compress the The number of transistors, and 7T1C and other circuits are difficult to apply to displays with 800PPI and above due to the limitation of the number of transistors

Method used

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

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Embodiment Construction

[0034] In order to make the content of the present invention clearer and easier to understand, the content of the present invention will be further described below in conjunction with the accompanying drawings. Of course, the present invention is not limited to this specific embodiment, and general replacements known to those skilled in the art are also covered within the protection scope of the present invention.

[0035] Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. 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. Secondly, the present invention is described in detail by means of schematic diagrams. When describing the examples of the present invention in detail, for the convenience of illustration, the schematic diagrams are not partially enlar...

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Abstract

The invention provides a pixel circuit and a driving method thereof, a display panel and a display device; the pixel circuit comprises first to fourth transistors, a storage capacitor, a coupling capacitor and an organic luminescence element; the transistors and capacitors are matched so as to compensate a threshold voltage of a driver transistor, so a driving current that drives the organic luminescence element to shine is irrelevant to the threshold voltage of the driver transistor, thus preventing the threshold voltage fluctuation of the driver transistor from affecting the organic luminescence element, solving the uneven display brightness problem caused by said reason, and improving the whole frame display effect; the transistor number can be reduced, thus realizing high resolution displaying.

Description

technical field [0001] The present invention relates to the technical field of plane display, in particular to a pixel circuit and its driving method, a display panel and a display device. Background technique [0002] Organic Light Emitting Diode (OLED) is one of the hot spots in the field of display research today. Compared with Liquid Crystal Display (LCD), OLED has low energy consumption, low production cost, self-illumination, wide viewing angle and Fast response and other advantages. At present, OLED displays have begun to replace traditional LCD displays in display fields such as mobile phones, PDAs, and digital cameras. Among them, pixel circuit design is the core technical content of OLED display, which has important research significance. [0003] Unlike LCD, which uses a stable voltage to control brightness, OLED is current-driven and requires a stable current to control light emission. Due to the process and device aging, there will be non-uniformity in the th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3233
CPCG09G3/3233
Inventor 赵国华金波朱晖
Owner KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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