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Pixel driving circuit and display device

A technology of a pixel driving circuit and a driving method, applied in static indicators, instruments, etc., can solve the problems of UI signal generation and input difficulties, and achieve the effect of simple support, reliability, and simplification of input signals

Active Publication Date: 2018-12-18
NANJING CEC PANDA LCD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used Vdate range is -7V~-2V, and the high-low level difference V1-V2 of the Ui signal needs to be around 6.5V, so the generation and input of the UI signal is difficult

Method used

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  • Pixel driving circuit and display device
  • Pixel driving circuit and display device
  • Pixel driving circuit and display device

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Embodiment Construction

[0060] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other accompanying drawings based on these drawings and obtain other implementations.

[0061] In order to make the drawing concise, each drawing only schematically shows the parts related to the present invention, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown, or only one of them is marked. Herein, "a" not only means "only one", but also means "more than one".

[0062] Such as ...

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Abstract

The invention discloses a pixel driving circuit. On the basis of the existing structure, the pixel driving circuit is provided with a fifth thin film transistor connected between the first end of an electro-optical element and a driving transistor. The fifth thin film transistor is turned on or off by a first pulse signal having an inverse phase as a scanning signal. The fifth thin film transistoris turned off in a compensation phase to isolate the influence of the electro-optical element on the terminal voltage of the second access of a compensation transistor, to ensure the reliability of threshold voltage compensation, and to ensure that the magnitude of driving current input into the electro-optical element is independent of the threshold voltage of the driving transistor. The presentinvention also discloses a display device including the pixel driving circuit.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a current-driven pixel drive circuit and a display device. Background technique [0002] At present, the mature display technology on the market is LCD (liquid crystal display) technology, while OLED (organic electroluminescence display), QLED (quantum dot electroluminescence display), Micro-LED (micro-electroluminescence display) and other new display technologies are based on The advantages of high contrast, high color gamut, wide viewing angle, low energy consumption, low response time and thinner and lighter brought by self-illumination have attracted everyone's attention. [0003] LCD uses a voltage drive method, and the pixel drive circuit has only one switching TFT (thin film transistor), while new display technologies such as OLED, QLED, and Micro-LED mainly use a current drive method. Taking the OLED display as an example, the basic pixel driving circuit contai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3233
CPCG09G3/3233
Inventor 张骏
Owner NANJING CEC PANDA LCD TECH