Organic electroluminescence display device and its manufacturing method and display device

Abstract

The invention provides an organic electroluminescence display device and its preparation method and display device. The organic electroluminescence display device includes a light emitting area and a peripheral circuit area surrounding the light emitting area. The light emitting area includes a cathode, a light emitting layer, an anode, and a pixel. Drive circuit, the peripheral circuit area includes a first power line, a second power line and an array substrate row drive circuit, the cathode extends to the peripheral circuit area and is electrically connected to the first power line, and the organic electroluminescent display device also includes at least one covering the cathode A protective layer for the connection area with the first power line. By setting the protective layer, the cathode lap resistance can be effectively reduced, the power consumption of the device can be reduced, the cathode corrosion can be delayed and the packaging effect can be improved.

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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