AMOLED pixel driving circuit and method realizing voltage and current mixed programming

A pixel drive circuit and hybrid programming technology, applied in instruments, static indicators, etc., can solve the problems of low display accuracy, poor pixel display uniformity, slow response speed, etc., achieve fast programming and high speed, ensure display effect, and ensure response. effect of speed

Inactive Publication Date: 2015-12-09
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an AMOLED pixel drive circuit and method for mixed programming of voltage and current, which are used to solve the problem of poor pixel display uniformity, low resolution, slow response speed, Low display accuracy and other issues

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  • AMOLED pixel driving circuit and method realizing voltage and current mixed programming
  • AMOLED pixel driving circuit and method realizing voltage and current mixed programming
  • AMOLED pixel driving circuit and method realizing voltage and current mixed programming

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Embodiment Construction

[0046] 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 embodiments, 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.

[0047] see Figure 4 ~ Figure 5 . It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of ​​the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily d...

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Abstract

The invention provides an AMOLED pixel driving circuit and method realizing voltage and current mixed programming. The AMOLED pixel driving circuit comprises a driving transistor, a first switch transistor, a second switch transistor, a third switch transistor, a capacitor and an organic light-emitting diode. In the programming stage, pixel units are programmed row by row, the first and second switch transistors are switched on in the programming process, the third switch transistor is switched off, a current flows from the driving transistor, the first and second switch transistors to a fixed current signal, and after the programming is finished, the first and second switch transistors are switched off, and the programming of a next row is started; and in a light-emitting stage, the first and second switch transistors are switched off, the third switch transistor is switched on, the current flows from the driving transistor and the third switch transistor to the organic light-emitting diode, and the organic light-emitting diode is driven for emitting light. Through a voltage and current mixed programming mode, comprehensive compensation is carried out on each non-ideal factor of AMOLED pixels, and the programming speed is relatively high, so that the AMOLED pixel driving circuit and method are good in display effect and high in response speed.

Description

technical field [0001] The invention relates to the technical field of display driving, in particular to an AMOLED pixel driving circuit and method for mixed programming of voltage and current. Background technique [0002] In recent years, active-matrix organic light-emitting diode (AMOLED, Active-matrixorganiclight-emittingdiode) display has become a strong competitor of the next-generation display technology. The advantages of AMOLED include fast response time, high contrast ratio, large viewing angle, etc. [0003] Such as figure 1 As shown, the most basic light-emitting pixel structure of AMOLED is a 2T1C structure (two transistors and a capacitor), and the pixel of the 2T1C structure includes: a drive transistor T connected to an organic light-emitting diode D d , drive transistor T d The source and gate of the capacitor C are connected, while driving the transistor T d The gate of the switching transistor T1 is also connected to the drain of the switching transist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
Inventor 汪辉丁毅岭方娜汪宁章琦田犁封松林
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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