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Active organic light emitting diode driving system and driving method

A technology of light-emitting diodes and driving systems, applied in instruments, static indicators, etc., can solve the problems of uneven threshold voltage, complex pixel structure, unfavorable aperture ratio, etc., and achieve the effect of reducing area, convenient operation and improving display 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 above-mentioned shortcomings of the prior art, the object of the present invention is to provide an active organic light emitting diode drive system and its drive method, which is used to solve the uneven threshold voltage of the AMOLED display pixel drive device and the complex pixel structure in the prior art. , which is not conducive to the problem of increasing the opening ratio

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  • Active organic light emitting diode driving system and driving method
  • Active organic light emitting diode driving system and driving method
  • Active organic light emitting diode driving system and driving method

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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] In the prior art, in order to compensate the inhomogeneity of the threshold voltage of each pixel driving transistor, most of them add some transistors and capacitors on the basis of the original 2T1C, or try to reduce the number of transistors and capacitors, such as through optical signal sampling and feedback. Compensation, because to solve the non-linear relationship between the optical signal and the photoelectric signal, i...

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Abstract

The invention provides a driving system and a driving method for an active organic light-emitting diode. The driving system comprises a light-emitting driving module, a light signal sampling module, a transformation matrix unit, a reference voltage unit, a feedback signal matrix unit, a selector unit and an organic light-emitting diode, wherein the transformation matrix unit, the reference voltage unit, the feedback signal matrix unit and the selector unit form a compensating circuit together; the light signal sampling module adopts a novel sampling device with an embedded light-sensing element. The driving system is simple in structure and convenient to operate, a linear relationship is generated between light signals and photoproduction electrical signals, an additional correction module is not needed, and the driving system is beneficial to compensating the compensating circuit, thus the luminance nonuniformity of pixel units is overcome, and the area of single pixel is also reduced.

Description

technical field [0001] The invention relates to semiconductor technology, in particular to an active organic light emitting diode driving system and a driving method thereof. Background technique [0002] 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 AMLCD, AMOLED has the advantages of low energy consumption, wide viewing angle, high brightness and fast response. [0003] The most commonly used AMOLED pixel drive circuit is a 2T1C structure, such as figure 1 shown. The gate of the transistor T1 is connected to the control voltage signal SEL, the first electrode is connected to the data voltage signal Vdata, and the second electrode is connected to the storage capacitor C st The first terminal and the gate of the drive transistor DTFT, the storage capacitor C st The second end of the second terminal is connected to the power supply v...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3258
Inventor 汪辉强文华章琦田犁汪宁方娜封松林
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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