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Pixel circuit and display device

A technology for pixel circuits and display devices, which is applied to circuits, electrical components, and electric solid-state devices, etc., can solve the problem of uneven display brightness of display devices, reduce the number of signal lines, improve pixel density, and solve the effect of threshold voltage drift.

Active Publication Date: 2014-10-08
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 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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Embodiment Construction

[0029] The specific implementation manners of the present invention will be further described below in conjunction with the drawings and examples. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0030] An embodiment of the present invention provides a pixel circuit, such as figure 1 Or as shown in Figure 3, it includes: two sub-pixel circuits P1 and P2, where each sub-pixel circuit corresponds to a pixel; each pixel sub-circuit includes: five switching units T1, T2, T3, T4, T5, one driving unit DT, an energy storage unit C, and an electroluminescence unit L (for easy distinction, in figure 1 Or in Figure 3, the five switching units in P2 are represented as T1', T2', T3', T4', T5' respectively, the drive unit is represented as DT', the energy storage unit is C', and the electroluminescent unit is L ', the same below),

[0031] Both the control en...

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Abstract

The invention provides a pixel circuit which comprises two sub-pixel circuits. Each sub-pixel circuit comprises five switch units, a driving unit, an energy storage unit and an electroluminescence unit, and the first switch unit, the second switch unit and the fifth switch unit of the first sub-pixel circuit and the first switch unit, the second switch unit and the fifth switch unit of the second sub-pixel circuit share a scanning signal line. In the pixel circuit, working currents flowing through devices of the electroluminescence units are not influenced by the threshold voltage of corresponding driving transistors, and the problem that uneven display luminance is caused by threshold voltage drifting of the driving transistors is thoroughly solved. In the pixel circuit, driving of two pixels is completed through one compensating circuit, two adjacent pixels share a plurality of signal lines, the number of the signal lines, used in the pixel circuit, in the display device can be decreased, the cost of integration circuits can be reduced, the pixel distance can be decreased, and the pixel density can be increased.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel circuit and a display device. Background technique [0002] Organic light-emitting display (OLED) is one of the hot spots in the field of flat panel display research. Compared with liquid crystal display, OLED has 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 display fields such as mobile phones, PDAs, and digital cameras. Pixel drive circuit design is the core technical content of OLED display, which has important research significance. [0003] Unlike TFT (Thin Film Field Effect Transistor)-LCD, which uses a stable voltage to control brightness, OLED is current-driven and requires a stable current to control light emission. [0004] Due to the process and device aging, in the original 2T1C driving...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/32G09G3/32G09G3/3233
CPCG09G3/3233G09G3/3291G09G2300/0426G09G2300/043G09G2300/0465G09G2300/0819G09G2300/0842G09G2300/0861G09G2310/0202G09G2310/0262G09G2320/043
Inventor 杨盛际
Owner BOE TECH GRP CO LTD
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