Pixel driving circuit and organic light emitting diode display

A technology of pixel drive circuit and light-emitting diode, applied in static indicators, instruments, etc., can solve problems such as changes in OLED drive current, poor display of OLED displays, and impact on display picture quality, and achieve the effect of eliminating threshold voltage drift

CN107393479BActive Publication Date: 2019-10-25SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-10-25

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Abstract

The invention provides a pixel driving circuit and an organic light-emitting diode display with the pixel driving circuit. According to the pixel driving circuit, a pixel driving circuit of a 6T1C pixel structure is adopted to effectively compensate a threshold value voltage of a thin-film transistor for driving an organic light-emitting diode to emit light in a pixel, so that the current which flows to the organic light-emitting diode is irrelevant to the threshold value voltage of the thin-film transistor, and therefore the phenomenon that the picture is poorly displayed caused by shifting of the threshold voltage of the thin-film transistor is eliminated.
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Description

technical field

[0001] The invention belongs to the technical field of organic electroluminescence, and in particular relates to a pixel driving circuit and an organic light emitting diode display. Background technique

[0002] In recent years, organic light-emitting diode (Organic Light-Emitting Diode, OLED) display has become a very popular emerging flat-panel display product at home and abroad, because OLED display has self-illumination, wide viewing angle, short response time, high luminous efficiency, wide color gamut , low operating voltage, thin thickness, large-size and flexible displays can be produced, and the manufacturing process is simple, and it also has the potential of low cost.

[0003] In an OLED display, a thin film transistor (TFT) is usually used together with a capacitor to store signals to control the brightness grayscale performance of the OLED. In order to achieve the purpose of constant current driving, each pixel needs at least two TFTs and a stor...

Examples

Embodiment Construction

[0021] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. Rather, the embodiments are provided to explain the principles of the invention and its practical application, thereby enabling others skilled in the art to understand the invention for various embodiments and with various modifications as are suited to particular intended uses.

[0022] In the drawings, the thicknesses of layers and regions are exaggerated for device clarity. Like reference numerals refer to like components throughout the specification and drawings.

[0023] figure 2 is a structural diagram of an OLED display according to an embodiment of the present invention.

[0024] refer to figure 2 , the organic light emitting diode display according to the embodiment of the present invent...