Pixel driving circuit, display device and pixel driving method

A pixel driving circuit and driving method technology, applied in static indicators, instruments, etc., can solve problems such as uneven display brightness of light-emitting elements, and achieve the effects of solving uneven display brightness, reducing current density, and increasing aperture ratio

Inactive Publication Date: 2015-02-04
BOE TECH GRP CO LTD +1
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  • Abstract
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  • Claims
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Problems solved by technology

Specifically, by setting the reset unit, the storage capacitor not only stores the data voltage but also stores the threshold voltage of the driving unit during the charging phase, thereby compensating the driving unit during the driving phase, so that the operating current of the driving unit is no longer affected by the threshold voltage , thereby eliminating the influence of the threshold voltage of the drive unit on its operating current, solving the problem of uneven display brightness of the light-emitting element due to inconsistent threshold voltages, and improving the display quality of the display device

Method used

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  • Pixel driving circuit, display device and pixel driving method
  • Pixel driving circuit, display device and pixel driving method
  • Pixel driving circuit, display device and pixel driving method

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Embodiment Construction

[0037] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, some specific embodiments are only used for descriptive purposes, and should not be understood as having any limitation on the present invention, but are merely examples of the present invention. When it may cause confusion in the understanding of the present invention, conventional structures or configurations will be omitted.

[0038] image 3 It is a schematic structural diagram of a pixel driving circuit 300 in a display device according to an embodiment of the present invention. The pixel driving circuit 300 is used to drive the light-emitting element 3000. in image 3 Among them, the light emitting element 3000 is shown as a light emitting diode OLED. Such as image 3 As shown, the pixel driving circuit 300 of the embodiment of the present invention includes: a scan line S(n) for providing scan signals; a...

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Abstract

The invention relates to a pixel driving circuit, a display device and a pixel driving method. The pixel driving circuit comprises a reset unit, and due to the rest unit, a storage capacitor not only stores data voltage in a charging stage, but also stores a threshold voltage of a driving unit so as to compensate the driving unit in a driving stage. The working current of the driving unit is no longer affected by the threshold voltage so as to eliminate the influence of the threshold voltage of the driving unit on the working current, so that the problem that the display brightness of a light emitting element is not uniform as the threshold voltage is inconsistent is solved, thereby improving the display quality of the display device. In addition, by moving the reset unit out of an effective display region, a row of pixel driving circuits share the reset unit, so that the aperture ratio of pixels can be greatly improved, the current density of an organic light emitting layer can be reduced and the service life of a display panel is prolonged.

Description

Technical field [0001] The present invention relates to display technology, and more specifically, to a pixel driving circuit, a display device, and a pixel driving method, which can compensate for the threshold voltage of the driving circuit of a light-emitting element to improve display quality. Background technique [0002] Organic light emitting display (AMOLED) is one of the hot spots in the field of flat panel display research today. Compared with liquid crystal display (LCD), organic light emitting diode (OLED) has low energy consumption, low production cost, self-luminescence, wide viewing angle and fast response speed. Advantages. At present, OLEDs have begun to replace traditional LCD displays in the display fields of mobile phones, PDAs, and digital cameras. Among them, pixel drive is the core technical content of AMOLED displays, which has important research significance. [0003] Unlike TFT-LCD, which uses a stable voltage to control brightness, OLED is current driven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32G09G3/3258
CPCG09G3/32G09G3/3233G09G2300/0819G09G2310/0251G09G2310/0262G09G2310/061G09G2300/0842G09G3/3258G09G3/3266G09G3/3283G09G2300/043G09G2310/08G09G2320/0233G09G2320/043
Inventor 青海刚祁小敬
Owner BOE TECH GRP CO LTD
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