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Pixel driving circuit, pixel driving method and display device

A pixel driving circuit and driving unit technology, applied in static indicators, instruments, etc., can solve the problems of driving thin film transistor threshold voltage difference, current inconsistency, affecting the image display effect, etc.

Active Publication Date: 2016-04-13
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The ability of AMOLED to emit light is driven by the current generated by the driving thin film transistor (DTFT) in a saturated state. Whether it is a low-temperature polysilicon (LTPS) process or an oxide (Oxide) process, due to the inhomogeneity of the process, it will lead to different positions. Thin-film transistors have different threshold voltages, which is fatal to the consistency of current-driven devices, because when the same driving voltage is input, different threshold voltages will generate different driving currents, resulting in inconsistent currents flowing through OLEDs. characteristics, making the display brightness uneven, thus affecting the display effect of the entire image

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

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Embodiment Construction

[0033] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, some specific embodiments are only for the purpose of description, and should not be construed as limiting the present invention, but are only examples of the present invention. Conventional structures or constructions will be omitted when they may obscure the understanding of the present invention.

[0034] Those skilled in the art can understand that the switching transistors and driving transistors used in all the embodiments of the present application can be thin film transistors or field effect transistors or other devices with the same characteristics. Preferably, the thin film transistor used in the embodiment of the present invention may be an oxide semiconductor transistor. The term "control terminal" used herein refers to a gate of a transistor, "input terminal" refers to one of a source and a drain of a t...

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Abstract

The invention relates to a pixel driving circuit, a pixel driving method and a display device. Voltage related to threshold voltage of a driving unit is stored in a storage unit by using a charge control unit in the compensation stage of the pixel driving circuit, and therefore, the working current of the driving unit is not influenced by the threshold voltage in the light emission maintaining stage of the pixel driving circuit, and influence of the threshold voltage of the driving unit on the working current of the driving unit is eliminated, the problem of non-uniform display luminance of a light emitting component due to inconsistent threshold voltage is solved, and the display quality of the display device is improved.

Description

technical field [0001] The present invention relates to display technology, more specifically, to a pixel driving circuit, a pixel driving method and a display device, which can improve display quality by compensating the threshold voltage of a driving circuit of a light-emitting element. Background technique [0002] Active Matrix Organic Light Emitting Diode (AMOLED) is one of the hotspots 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-luminous , wide viewing angle and fast response, etc. At present, OLED displays have begun to replace traditional LCD displays in the display fields of mobile phones, PDAs, and digital cameras. Among them, pixel driving is the core technical content of AMOLED display, which has important research significance. [0003] Unlike Thin Film Transistor-Liquid Crystal Display (TFT-LCD), which uses a stable volta...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3258
CPCG09G3/3258G09G3/3233G09G2300/0814G09G2300/0819G09G2320/0233G09G2300/0426G09G2300/0852G09G2310/0251G09G2320/0204
Inventor 何小祥祁小敬邓银
Owner BOE TECH GRP CO LTD