Organic light-emitting diode (OLED) display device and fabrication method thereof

Abstract

The invention provides an organic light-emitting diode (OLED) display device and a fabrication method thereof. The OLED display device comprises a substrate, a first electrode, an organic functional layer, a second electrode, a polymer dispersion liquid crystal layer and an upper part which are sequentially laminated, wherein the first electrode is a non-transparent electrode, the second electrodeis a semi-transparent electrode, and the first electrode, the organic functional layer and the second electrode form a microcavity structure. By the OLED display device, damage to the organic functional layer is prevented, the peeping prevention function can be achieved, the privacy of display content of the OLED display device is ensured, and the display content of the OLED display device also can be viewed clearly from each angle.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an OLED display device and a preparation method thereof. Background technique [0002] Organic Light-Emitting Diode (OLED) has the advantages of self-illumination, fast response, wide viewing angle, high brightness, thin and flexible, etc., its potential market prospect is optimistic by the industry, and it has become the next generation of display technology. The main direction of development. [0003] According to different light extraction methods, OLED display devices can be divided into bottom emission type and top emission type. The light of the top emission type OLED display device is extracted from the top. This device structure can greatly increase the aperture ratio of the display panel. Top-emission OLED display devices generally use a reflective metal bottom electrode and a transparent or translucent top electrode. Among them, the transparent electrode is generally ...

AI Technical Summary

Problems solved by technology

Top-emission OLED display devices generally use a reflective metal bottom electrode and a transparent or translucent top electrode. Among them, the transparent electrode is generally a conductive metal oxide, but its high-energy manufacturing process will cause damage to the organic layer, which is not conducive to maintaining device performance; The transparent top electrode generally adopts a thin metal layer. In order to maintain its conductivity, the thin metal layer generally has a thickness of 10-15nm. The metal film under this thickness has a certain light reflectivity, which is easy to cause the microcavity effect. Due to the brightness of the microcavity structure It changes with the viewing angle, so people next to the OLED display device cannot see the display content, ensuring the privacy of the display content, but it also creates a viewing angle problem, which is not conducive to maintaining the display effect of the OLED display device, that is, it cannot be viewed from all angles. Clear display content of OLED display device

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