AMOLED array substrate and display device

Abstract

The invention discloses an AMOLED array substrate. The AMOLED array substrate comprises a plurality of pixel structures formed in an array mode on a substrate base plate, wherein each pixel structure is defined by a grid line, a signal line and a power line, and the signal line and the power line are perpendicular to the grid line. Each pixel structure comprises a thin film transistor structure, a positive electrode, a negative electrode and an organic luminous layer between the positive electrode and the negative electrode, wherein the positive electrode is located in a region corresponding to each pixel structure, and the negative electrode is a transparent electrode covering the whole substrate base plate. Each pixel structure further comprises a first negative electrode auxiliary line parallel to the signal line, wherein the first negative electrode auxiliary line is connected with the negative electrode through at least two dotted first through holes. In the AMOLED array substrate, each negative electrode is connected with the corresponding first negative electrode auxiliary line on the same layer with the corresponding signal line through the at least two dotted first through holes to enable each negative electrode and the corresponding first negative electrode auxiliary line to be connected in parallel, and the negative electrode resistance is reduced. In addition, the width of each first negative electrode auxiliary line can be decreased, the influence on the opening rate is reduced, and the opening rate is improved compared with the prior art.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an AMOLED array substrate and a display device. Background technique [0002] For a top-emitting AMOLED display device, the cathode is formed by a transparent electrode (such as: ITO), and it is a block electrode covering the array substrate as a whole, so the resistance of the cathode is very high. The cathode resistance is very high, which will increase the IR drop. Excessive IR drop will affect the uniformity of the picture. In order to reduce IR drop, cathode auxiliary lines are used in existing solutions to reduce IR drop, such as figure 1 As shown, in the non-pixel area on the array substrate, several cathode auxiliary lines located on different layers from the cathode are formed, usually at the same time as the anode and / or gate line (or signal line), as shown in figure 1 The middle cathode auxiliary line 120 and the anode 110 are made of the same material and formed at...

AI Technical Summary

Problems solved by technology

However, it is necessary to lay several cathode auxiliary lines 120 on the edge of the pixel area (display area), and to form strip-shaped via holes 130. Small, that is, the light-emitting area becomes smaller, which will lead to a decrease in the aperture ratio of the entire display device

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