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Pixel circuit and driving method thereof and display device

A technology of a pixel circuit and a driving unit is applied in the field of pixel circuits and driving methods thereof and display devices, which can solve the problem of uneven display brightness of display devices, and achieve the effects of solving threshold voltage drift, saving energy consumption and reducing interference.

Active Publication Date: 2014-11-26
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of uneven display brightness of the display device, reduce the number of signal lines used for the pixel circuit in the display device, reduce the cost of the integrated circuit, and improve the pixel density of the display device at the same time

Method used

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

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Embodiment Construction

[0032] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and embodiments. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

[0033] The embodiment of the present invention provides a pixel circuit, such as figure 1 or as shown in Figure 3, including:

[0034] Five switch units T1, T2, T3, T4, T5, one drive unit DT, one energy storage unit C, and one electroluminescence unit L;

[0035] The control terminals of T1 and T5 are both connected to the second scan signal line Scan[2]; the first terminal of T1 is connected to the working voltage line V dd , its second end is connected to the input end of the drive unit DT; the first end of T5 is connected to the output end of DT, and its second end is connected to the second end B end of the energy storage unit C;

[00...

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Abstract

The invention provides a pixel circuit and a driving method thereof and a display device. The pixel circuit includes a first switch unit, a second switch unit, a third switch unit, a fourth switch unit, a fifth switch unit, a driving unit, an energy storage unit and an electroluminescent unit, controls ends of the first switch unit and the fifth switch unit are connected to a second scanning signal line, and control ends of the second switch unit, the third switch unit and the fourth switch unit are connected to a first scanning signal line. The pixel circuit provided by the invention can completely solve the problem that due to threshold voltage drift of a driving transistor, display brightness is nonuniform. In the pixel circuit in the invention, only two switching signal input circuits are arranged, thereby not only saving energy consumption, but also reducing interference between the circuits.

Description

technical field [0001] The present invention relates to the field of display technology, and in particular, to a pixel circuit, a driving method thereof, and a display device. Background technique [0002] Organic Light Emitting Displays (OLEDs) are one of the hotspots in the research field of flat panel displays. Compared with liquid crystal displays, OLEDs have the advantages of low energy consumption, low production cost, self-illumination, wide viewing angle and fast response speed. At present, OLEDs have begun to replace traditional liquid crystal (LCD) displays in the display fields of mobile phones, PDAs, and digital cameras. Pixel drive circuit design is the core technology content of OLED display, which has important research significance. [0003] Unlike TFT (Thin Film Field Effect Transistor)-LCD, which uses stable voltage to control brightness, OLED is current-driven and requires stable current to control light emission. [0004] Due to the process and device a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32G09G3/3266G09G3/3283
CPCG09G3/32G09G3/3233
Inventor 杨盛际董学王海生丁小梁刘英明赵卫杰任涛
Owner BOE TECH GRP CO LTD
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