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Organic light-emitting display and driving method

A technology of a light-emitting display and a driving method, which is applied to static indicators, instruments, etc., can solve the problems of threshold drift of the driving tube, unable to provide stable current, etc., and achieve the goal of simplifying design complexity, improving light-emitting quality, and reducing R&D and manufacturing costs. Effect

Active Publication Date: 2011-04-27
SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0008] The problem solved by the present invention is that in the pixel unit of the organic light-emitting display in the prior art, the driving tube cannot provide a stable current due to threshold drift

Method used

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  • Organic light-emitting display and driving method

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Embodiment approach

[0061] Correspondingly, the present invention also provides a driving method of an organic light emitting display. According to an embodiment of the driving method, it includes: providing a stable voltage or a constant current power supply to the drain of the driving MOS transistor, and gating the pixel units row by row through the scan signal, wherein, when the pixel unit is turned on by the scan signal During the gate-on period of the first switch MOS transistor, according to the display requirements of the row of pixel units, a corresponding driving data signal is input to the row of pixel units through the first switch MOS transistor in the row of pixel units, and the driving data signal starts to decay. The time is later than the end time of the gate of the scan signal corresponding to the row of pixel units.

[0062] in the corresponding image 3 During the driving process of the organic light emitting display of the pixel unit shown, the sum of the voltage value corres...

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Abstract

The invention relates to an organic light-emitting display and a driving method. The organic light-emitting display comprises a plurality of scanning lines, a plurality of data lines and a power line, wherein the scanning lines and the data lines are crosswise arranged and define a plurality of pixel units. Each of the pixel units comprises a driving MOS (Metal Oxide Semiconductor) tube, a first switch MOS tube, a storage capacitor, an organic light-emitting diode and a threshold compensating circuit, wherein the threshold compensating circuit is used for compensating the threshold shift of the driving MOS tube so that current flowing through the driving MOS tube is not influenced by the threshold shift of the driving MOS tube. The light-emitting quality of the organic light-emitting display is improved, and the organic light-emitting display does not use an external compensating circuit for compensating thresholds, thereby the design complexity of peripheral driving circuits is also correspondingly simplified, and the developing and manufacturing cost is reduced.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an organic light emitting display and a driving method. Background technique [0002] Compared with the current mainstream display technology thin-film transistor liquid crystal display (TFT-LCD), organic light-emitting display (OLED) has the advantages of wide viewing angle, high brightness, high contrast, low energy consumption, thinner and thinner, etc. It is the focus of attention of current flat panel display technology . [0003] There are two types of drive methods for organic light emitting displays: passive matrix (PM) and active matrix (AM). Compared with the passive matrix drive, the active matrix drive has the advantages of large display information, low power consumption, long device life, and high screen contrast. [0004] refer to figure 1 As shown, an equivalent circuit of a pixel unit of an active matrix organic light emitting display in the prior art include...

Claims

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Application Information

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IPC IPC(8): G09G3/32G09G3/3233G09G3/3266
Inventor 何为李忠丽吴勇黄文霍思涛凌志华
Owner SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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