Organic electroluminescence display device, preparation method thereof and display device

Abstract

The invention provides an organic electroluminescence display device, a preparation method thereof and a display device. The organic electroluminescence display device comprises a light emitting area and a peripheral circuit area which surrounds the light emitting area. The light emitting area comprises a cathode, a light emitting layer, an anode and a pixel driving circuit. The peripheral circuit area comprises a first power supply line, a second power supply line and an array substrate line driving circuit. The cathode extends to the peripheral circuit area and is electrically connected with the first power supply line. The organic electroluminescence display device further comprises a protective layer which at least covers a connecting area between the cathode and the first power supply line. Through setting the protective layer, the organic electroluminescence display device, the preparation method thereof and the display device have advantages of effectively reducing cathode bonding resistance, reducing device power consumption, delaying cathode corrosion and improving packaging effect.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an organic electroluminescence display device, a preparation method thereof, and a display device. Background technique [0002] Organic electroluminescence display is a new type of active light-emitting display device with organic materials as the light-emitting layer. It has the advantages of light weight, thin thickness, fast response speed, no need for backlight and flexible display. It is a new generation of dreamy display. device. According to the light-emitting position of organic electroluminescent display devices, it can be divided into two types: bottom emission organic electroluminescent display and top emission organic electroluminescent display. Compared with bottom emission, top emission has the advantage of higher aperture ratio and has become the mainstream. display device structure. However, a top-emission organic electroluminescence display requires a translu...

AI Technical Summary

Problems solved by technology

However, a top-emission organic electroluminescence display requires a translucent metal cathode, so the thickness of the cathode is very thin, usually about ten nanometers, and the gradient difference that exists when the cathode overlaps with the first power line (ie, the Vss circuit) reaches as high as 1 to 2 microns, which leads to fault open circuit easily, and because the metal used in the cathode is usually a relatively active low work function metal, it is easy to be corroded by water and oxygen, resulting in the failure of the organic electroluminescent display device

[0003] Therefore, the current top-emission organic electroluminescent display technology still needs to be improved.

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