Active matrix organic light emitting diode pixel driving circuit and driving method thereof

A technology of pixel driving circuit and light emitting diode, which is applied to instruments, static indicators, etc., can solve the problems of uneven threshold voltage, complex pixel structure, unfavorable aperture ratio, etc., and achieve uniformity improvement, uniformity improvement, and display effect. Effect

Active Publication Date: 2016-04-20
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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Problems solved by technology

[0007] In view of the shortcomings of the prior art described above, the object of the present invention is to provide an active matrix organic light emitting diode display pixel drive circuit and its driving method, which is used to solve the threshold voltage of the active matrix organic light emitting diode display pixel drive device in the prior art. Unevenness and complex pixel structure are not conducive to the improvement of the aperture ratio

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  • Active matrix organic light emitting diode pixel driving circuit and driving method thereof
  • Active matrix organic light emitting diode pixel driving circuit and driving method thereof
  • Active matrix organic light emitting diode pixel driving circuit and driving method thereof

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Embodiment Construction

[0062] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0063] Compensating the non-uniformity of the threshold voltage of each pixel drive transistor in the prior art mostly adopts the combination of multiple capacitors and transistors, or although the number of capacitors is small, the number of transistors is large, resulting in a complex pixel structure and reducing the pixel density. The aperture ratio affects the imaging quality. The pixel driving circuit of the present invention can...

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Abstract

The invention provides an active matrix organic light emitting diode pixel drive circuit and a driving method thereof. The drive circuit comprises a first transistor, a second transistor, a third transistor, drive transistors, a compensation capacitor and an organic light emitting diode, wherein embedded tunneling field-effect tubes are arranged on the drive transistors and can be used for changing threshold voltages of the drive transistors so as to change the magnitude of drive currents, unevenness of threshold voltages of the pixel drive transistors is compensated, the area of a single pixel is reduced, and improvement of the aperture opening ratio is facilitated.

Description

technical field [0001] The invention relates to a pixel driving technology of a light emitting diode display, in particular to an active matrix organic light emitting diode pixel driving circuit and a driving method thereof. Background technique [0002] Capacitor-compensated active matrix organic light emitting diode (ActiveMatrix / OrganicLightEmittingDiode, AMOLED) display is one of the hotspots in the field of flat panel display research today. Compared with traditional organic light emitting diodes, active matrix organic light emitting diodes have low energy consumption, wide viewing angle, and fast response. , high contrast and so on. [0003] The thin-film transistors used in the pixels of active matrix organic light-emitting diodes are mainly divided into hydrogenated amorphous silicon thin-film transistors (a-Si: HTFT) and low-temperature polysilicon thin-film transistors (LTPSTFT). : The carrier mobility of HTFT is lower than that of LTPSTFT. Compared with pixels u...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3258G09G3/3233
Inventor 刘超丁毅岭方娜田犁汪宁章琦汪辉封松林
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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