Pixel structure and preparation method thereof and display device

Abstract

The invention belongs to the technical field of display, and particularly relates to a pixel structure and a preparation method thereof and a display device. The pixel structure comprises multiple sub-pixels which are first sub-pixels, second sub-pixels and third sub-pixels. The first sub-pixels, the second sub-pixels and the third sub-pixels are cyclically arranged in turn in a row direction. The same sub-pixels of every two adjacent rows are arranged in a spacing way in a column direction, and the same sub-pixels of the adjacent rows are arranged in a mirror symmetry way in the column direction. Each second sub-pixel is arranged on the center line between each first sub-pixel and each third sub-pixel of the adjacent row. Each second sub-pixel and one third sub-pixel and one first sub-pixel which are arranged in the adjacent row of the second sub-pixel and adjacent to the second sub-pixel form a pixel unit. The pixel structure is better in display chromaticity uniformity; besides, the hole number of a high-precision metal mask plate can be reduced, the manufacturing difficulty of the metal mask plate can be reduced and the high-resolution OLED product can be easier to prepare.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a pixel structure, a preparation method thereof, and a display device including the pixel structure. Background technique [0002] Commonly used flat panel display devices generally include LCD (Liquid Crystal Display: Liquid Crystal Display) and OLED (Organic Light-Emitting Diode: Organic Light-Emitting Diode) display devices. In particular, OLED display devices have many advantages such as self-luminescence, fast response speed, and wide viewing angle compared with LCDs, and are suitable for various applications such as flexible displays, transparent displays, and 3D displays. [0003] At present, in the preparation process of top-emitting active matrix organic light-emitting diode (AMOLED) display devices, a high-definition metal mask (Fine Metal Mask, referred to as FMM) is usually used, evaporated by a vacuum evaporation process, and a high-definition metal mask...

AI Technical Summary

Problems solved by technology

Among them, the high-definition metal mask generally has a minimum opening limit, and the sub-pixels of different colors in the evaporation process have a limit on the opening pitch. It is difficult to achieve the best of both worlds with high resolution and maximum pixel aperture ratio.

However, there is a bottleneck in the manufacturing process of high-definition metal masks, which greatly limits the pixel resolution (Pixels Per Inch, PPI) of AMOLED products, and the fineness of the screen display cannot be compared with LCD products with high PPI.

[0004] Since the production of high-definition metal masks is very difficult, especially the resolution of display products is getting higher and higher, the number of openings in high-definition metal masks is large, and the production of metal masks is becoming more and more difficult. High-definition metal masks Templates are very expensive

In addition, defects in high-definition metal masks will lead to defects such as color mixing in organic electroluminescent display devices, and the more high-definition metal masks are used, the more prone to product defects, thereby reducing the yield of products

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