Array substrate and display device

Abstract

The invention provides an array substrate and a display device. The array substrate comprises a first material layer located on a thin film transistor, a conductive sandwich layer located on the first material layer and a second material layer located on the conductive sandwich layer. The first material layer is provided with a first via hole. The conductive sandwich layer is electrically connected with the drain of the thin film transistor through the first via hole. The second material layer is provided with second via hole staggered with first via hole. A pixel electrode is located on the second material layer. The conductive sandwich layer is electrically connected with the pixel electrode through the second via hole so as to form a storage capacitor along with a public electrode. Part of material, located in the opening area of the array substrate, of the first material layer and part of material, located in the opening area of the array substrate, of the second material layer are color photo-resistors. The array substrate and the display device has the advantages that storage capacitance is increased, and display stability, pixel aperture rate and display quality are increased.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to an array substrate and a display device. Background technique [0002] COA (Color-filter on Array) technology is an integrated technology that directly manufactures the color filter layer on the array substrate, which can effectively solve the problems of light leakage caused by alignment deviation in the cell alignment process of liquid crystal display devices, and can significantly Increase the display aperture ratio. [0003] The structure of the array substrate using COA technology in the prior art can be as follows figure 1 As shown, it includes: substrate 101, gate line layer (including gate line, gate 102, common electrode), gate insulating layer 103, semiconductor layer 104, data line layer (including data line, source 105 and drain 106), an insulating layer 107, a color filter layer 108, a light shielding layer 109 and a pixel electrode 110. Wherein, the mate...

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Problems solved by technology

[0004] Since the size of the capacitor is inversely proportional to the distance between the two plates forming the capacitor, and the color filter layer 108 is generally required to be thicker, the pixel electrode 110 of the array substrate integrated with the color filter layer 108 in the prior art The distance between the common electrode and the common electrode is large, resulting in a reduction in storage capacitance, which cannot meet the leakage current requirements in the display cycle and reduces the stability of the display

[0005] Moreover, since the via hole electrically connecting the pixel electrode 110 and the drain electrode 106 needs to pass through the thick color filter layer 108, the depth of the via hole is extremely large, and the shape of the via hole is difficult to control, which can easily cause the aperture ratio of the via hole to increase. Too large, which will cause the pixel aperture ratio to decrease

On the other hand, the slope angle of the inner wall of the deeper via hole is too steep, which can easily cause the pixel electrode 110 mounted on it to break, reducing the display quality.

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