Organic light-emitting diode pixel circuit, driving method thereof and display panel thereof

A technology of light-emitting diodes and pixel circuits, applied in static indicators, instruments, etc., can solve the problems of driving current difference, long-range unevenness of AMOLED display brightness, etc., achieve uniformity, improve IRDrop problem, and solve threshold voltage drift and non-uniformity. The effect of uniformity

Active Publication Date: 2013-04-10
CHENGDU VISTAR OPTEOLECTRONICS CO LTD
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Problems solved by technology

This voltage difference (IR Drop) will cause differences in the driving current of pixels

Method used

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  • Organic light-emitting diode pixel circuit, driving method thereof and display panel thereof
  • Organic light-emitting diode pixel circuit, driving method thereof and display panel thereof
  • Organic light-emitting diode pixel circuit, driving method thereof and display panel thereof

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[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0032] Such as figure 1 As shown, it is a schematic diagram of the pixel circuit structure of the first preferred embodiment of the present invention.

[0033] The present invention provides an organic light emitting diode pixel circuit, which includes: a horizontal scan voltage signal SCAN, a data voltage signal DATA, a backplane power supply VDD, a light emission control signal EM, a ground electrode GND, and first to fifth N-type thin fi...

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Abstract

The invention provides an organic light-emitting diode pixel circuit, a driving method of the organic light-emitting diode pixel circuit and a display panel of the organic light-emitting diode pixel circuit. The organic light-emitting diode pixel circuit comprises an organic light-emitting diode, a first thin film transistor and a current conversion module. A grid of the first thin film transistor is connected with a line scan voltage signal, a source of the first thin film transistor is connected with a data voltage signal, and a drain of the first thin film transistor is connected with the current conversion module. The current conversion module is connected with a cathode of the organic light-emitting diode and a light-emitting control signal to be used for converting impressed voltage to drive current of the organic light-emitting diode. The organic light-emitting diode pixel circuit, the driving method of the organic light-emitting diode pixel circuit and the display panel of the organic light-emitting diode pixel circuit has the advantages of being capable of effectively solving the problems of drifting and inhomogeneity of threshold voltage which drives a thin film transistor and solving the IR Drop problem of rear panel power supply in the large-size active matrix or organic light-emitting diode (AMOLED) display so as to achieve uniformity of final display brightness.

Description

technical field [0001] The present invention relates to the technical field of organic light emitting display, in particular to an organic light emitting diode pixel circuit, a driving method and a display panel thereof. Background technique [0002] As a new type of display device, active matrix driven organic light-emitting display device (AMOLED) has been applied in many high-performance and large-size displays due to its outstanding advantages such as active light emission, higher contrast ratio, faster response and thinner volume. , and gradually become an emerging representative force in the display field. [0003] AMOLED mostly uses low-temperature polysilicon (LTPS) technology to realize its pixels and driving circuits. Compared with general amorphous silicon (amorphous-Si) process, LTPS thin film transistor has higher mobility and more stable characteristics, and is more suitable for AMOLED display. However, due to the limitations of the LTPS manufacturing process...

Claims

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Application Information

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IPC IPC(8): G09G3/32G09G3/3233
Inventor 韩珍珍邱勇黄秀颀高孝裕胡思明
Owner CHENGDU VISTAR OPTEOLECTRONICS CO LTD
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