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

A pixel circuit and light-emitting module technology, applied in static indicators, instruments, etc., can solve problems such as the brightness change of organic light-emitting diode D, the threshold voltage drift of driving thin film transistor T2, and poor display, so as to eliminate poor display and avoid voltage failure. Stability, the effect of ensuring stability

Active Publication Date: 2019-09-27
HEFEI XINSHENG OPTOELECTRONICS TECH CO LTD +1
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Problems solved by technology

[0004] However, because the driving thin film transistor T2 in the pixel circuit is under the action of the gate bias for a long time, the threshold voltage of the driving thin film transistor T2 drifts, so that the brightness of the organic light emitting diode D changes significantly, resulting in various display problems. bad

Method used

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

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Embodiment Construction

[0036] Specific implementations of a pixel circuit, a driving method thereof, an electroluminescent display panel, and a display device provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] An embodiment of the present invention provides a pixel circuit, such as figure 2 As shown, it may include: a first switch module 10, a second switch module 20, a light emitting module 30, and a dual driving module 40; wherein,

[0038] The signal control terminal of the first switch module 10 is connected to the first gate line signal terminal Gate1, the signal input terminal is connected to the data line signal terminal Data, and the signal output terminal is connected to the first node P1; Under the control of the gate line scan signal input by the gate line signal terminal Gate1, the data signal provided by the data line signal terminal Data is transmitted to the first node P1;

[0039]The signal co...

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Abstract

The invention discloses a pixel circuit, its driving method, an electroluminescent display panel and a display device. The pixel circuit includes a first switch module, a second switch module, a light emitting module, and a double driving module. Through the improvement of the pixel circuit , so that the first driving end of the dual driving module is connected to the first node, and the second driving end is connected to the second node. When the first gate line signal end and the second gate line signal end alternately input the gate line scanning signal, the first The switch module and the second switch module work alternately, so that the first drive terminal and the second drive terminal of the double drive module work alternately, so as to drive the light emitting module to emit light; in this way, through the alternate work of the two drive terminals, the double drive module is avoided. One of the drive terminals is unstable in voltage due to long-term working conditions, which ensures the stability of the grayscale brightness of the pixel and eliminates poor display.

Description

technical field [0001] The invention relates to the technical field of light emission, in particular to a pixel circuit, a driving method thereof, an electroluminescent display panel and a display device. Background technique [0002] Organic light emitting diodes (Organic Light Emitting Display, OLED) can be divided into passive matrix OLED (Passive Matrix OLED, PMOLED) and active matrix OLED (Active Matrix OLED, AMOLED) according to the driving method. Pixels arranged in an array belong to the active display type and have the advantages of high luminous efficacy, high contrast, wide viewing angle, etc., and are usually used in high-definition large-size display devices. At present, the commonly used AMOLED pixel circuit is a current-type drive circuit. When a current passes through the OLED, the OLED emits light, and the grayscale brightness of the pixel can be changed by controlling the current flowing through the OLED itself. [0003] In the prior art, the basic structu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3225
CPCG09G3/3225G09G3/3233G09G2300/0842G09G2300/0852G09G2310/0262G09G2320/043G09G2320/0233
Inventor 张淼陈沫孙静傅武霞
Owner HEFEI XINSHENG OPTOELECTRONICS TECH CO LTD
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