Pixel arrangement structure, organic electroluminescent device, display device, mask plate

Abstract

The invention discloses a pixel arrangement structure, an organic electroluminescence device, a display device, and a mask plate, which are used to make the opening area of ​​the metal mask plate for manufacturing the pixel arrangement structure larger, thereby increasing the aperture ratio, improving the brightness of AMOLED products, lifespan and image quality. The pixel arrangement structure includes a plurality of repeated pixel groups, and each pixel group includes four pixels, wherein the first pixel and the second pixel are arranged in the same row, and the third pixel and the fourth pixel are arranged in adjacent In another row, the first pixel and the third pixel are arranged in the same column, and the second pixel and the fourth pixel are arranged in another adjacent column; the arrangement of the sub-pixels in the first pixel is the same as that of the sub-pixels in the second pixel The arrangement is different, the arrangement of the sub-pixels in the third pixel is the same as the arrangement of the sub-pixels in the second pixel, the arrangement of the sub-pixels in the fourth pixel is the same as the arrangement of the sub-pixels in the first pixel.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a pixel arrangement structure, an organic electroluminescence device, a display device, and a mask plate. Background technique [0002] In mobile phone and tablet display technologies, Active Matrix Organic Light Emitting Diode (AMOLED) panels will gradually become the mainstream of next-generation displays due to their advantages such as self-illumination, bright colors, low power consumption, and wide viewing angles. [0003] The principle of AMOLED self-luminescence includes: use the indium tin oxide semiconductor (ITO) electrode and the metal electrode made on the backplane as the anode and cathode of the device respectively, vapor-deposit the organic semiconductor material and the luminescent material on the substrate, and drive it at a certain voltage Next, electrons and holes are injected from the cathode and anode into the electron and hole transport layers respectively,...

AI Technical Summary

Problems solved by technology

For high-resolution AMOLED, Fine Metal Mask (FMM) is one of the most critical technologies restricting its development. It is becoming more and more difficult. At the same time, due to the improvement of resolution, the distance between the sub-pixel light-emitting areas is required to be smaller and smaller, and the color mixing of the evaporated screen will become more and more serious, especially the traditional red (R ), green (G), blue (B) three sub-pixels, the length of the opening area of ​​FMM corresponding to each sub-pixel is relatively long, linearity control is difficult, and color mixing is prone to occur

Although the traditional RGB arrangement of dots (Slots) does not lead to a longer opening ratio and length, and the linearity is difficult to control, in the process of making the opening area of ​​FMM, there must be a gap between the opening areas of each Slot. There is a certain metal raw material as a connecting bridge (called Rib), which leads to a reduction in the size of the sub-pixel FMM opening area, thereby affecting the aperture ratio of the OLED display device

The aperture ratio is low, and the brightness and life cannot meet the requirements

As a result, the yield rate of AMOLED products is low, which limits the mass production of high-resolution AMOLED panels

[0005] The pixel arrangement structure in the prior art is as figure 1 As shown, the slot arrangement is adopted, and each pixel contains 3 sub-pixels, namely R, G, and B sub-pixels, and the high-definition metal mask (FMM) corresponding to each color sub-pixel is as follows figure 2 As shown, there is a light-emitting area in each FMM opening, and the distance between each sub-pixel and adjacent sub-pixels of different colors is called PDL gap. When the PDL Gap distance is constant, such as figure 1 As shown, when the distance is 22um, the pixel size is 63.3um, and the light emitting area of ​​sub-pixel R is 90.1um 2 , the light emitting area of ​​sub-pixel G is 114.48um 2 , the light emitting area of ​​sub-pixel B is 150.51um 2 , the aperture ratios of R, G, and B are 2.25%, 2.86%, and 3.76% respectively, and the total aperture ratio is 8.87%, which is too low to meet the product life requirements

[0006] To sum up, the pixel arrangement structure in the prior art leads to a smaller opening area of ​​the metal mask, thus resulting in a smaller light-emitting area, a low opening ratio, and product brightness and lifespan that cannot meet the requirements, making the yield of AMOLED products Low, which limits the mass production of high-resolution AMOLED panels

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