A display panel and a display device

Abstract

The invention discloses a display panel and a display device, comprising a substrate, a driving circuit layer on the substrate, a planarization layer on a side of the driving circuit layer opposite tothe substrate; A plurality of anodes arranged in an array on the side of the planarization layer facing away from the driving circuit layer, a light emitting layer on the side of each anode and the planarization layer facing away from the driving circuit layer, and a transparent cathode layer on the side of the light emitting layer facing away from the anode; Wherein the planarizing layer comprises a trench positioned between the respective anodes; A surface of that transparent cathode lay facing away from the light emit layer is provided with an auxiliary cathode in the trench. A trench is formed on the planarization layer, and the auxiliary cathode is arranged in the trench, so that the transparent cathode layer can be made of a transparent conductive material, and the auxiliary cathodeis directly formed on the transparent cathode layer in the trench, so that the auxiliary cathode is in contact with the transparent cathode layer. This can not only improve the light transmittance ofthe cathode but also reduce the total resistance of the cathode, which is conducive to image display.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a display panel and a display device. Background technique [0002] Organic Light-Emitting Diode (OLED for short) display panels have the advantages of wide viewing angle, high contrast, high response speed, low driving voltage, etc., and are widely used in the field of display technology. Existing OLEDs are divided into two types: bottom emission structure and top emission structure, and the OLED with bottom emission structure will be blocked by the lines on the bottom layer, so the aperture ratio is limited. Compared with the OLED of the bottom emission structure, the OLED with the top emission structure has a larger aperture ratio, so it is more widely used. [0003] However, OLED display panels with a top-emission structure require the greater the light transmittance of the cathode, the better. Accordingly, the thickness of the cathode needs to be made as thin as po...

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Problems solved by technology

[0003] However, OLED display panels with a top-emission structure require the greater the light transmittance of the cathode, the better. Accordingly, the thickness of the cathode needs to be made as thin as possible to increase its light transmittance, which will make the cathode have a higher resistance. Not good for image display

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