Pixel structure, mask plate and display device

Abstract

The present invention provides a pixel structure, a mask and a display device. In the pixel structure, each pixel group includes four sub-pixel groups with different colors, which can improve brightness, reduce power consumption, and increase color at the same time. domain; at least two sub-pixels of the same color can share one evaporation opening, further improving the space utilization rate, increasing the pixel aperture ratio, reducing the difficulty of making the mask, and helping to achieve high PPI.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a pixel structure, a mask plate and a display device. Background technique [0002] OLED (Organic Light-Emitting Diode, Organic Light-Emitting Diode) display technology has the characteristics of self-luminescence, using very thin organic material coating and glass substrate, because of its large viewing angle of the display screen and the advantages of saving power, it has been Widely used in mobile phones, digital cameras, DVD players, personal digital assistants (PDAs), notebook computers, car audio and televisions and other products. [0003] At present, the pixel structure of a typical OLED display panel is arranged in a side-by-side way. In this side-by-side way, there are red, green, There are three blue (R, G, B) sub-pixels, each sub-pixel is rectangular, and each has an independent organic light-emitting device. Specifically, such as figure 1 As shown, each pixel uni...

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned pixel structure, since the pixel area formed by the pixel unit Pixel is large, and the total area of ​​the OLED display panel is fixed, if the pixel area is large, the number of pixels will decrease, which will inevitably increase the pixel density (Pixel PerInch, referred to as PPI) increases are limited

Furthermore, FMM generally has a minimum opening limit, and the sub-pixels of different colors in the evaporation process are limited by the opening pitch. The fabrication of OLED pixel structures will inevitably be limited by the FMM opening and the precision of the evaporation process, and the above-mentioned OLED pixel In the structure, three RGB sub-pixels should be arranged in the range of one pixel. When the pixel density is higher than 300 PPI, the current FMM process is very difficult to realize; in addition, there are only three colors of RGB in the above-mentioned pixel structure, and its color gamut Relatively narrow, cannot reproduce very bright unsaturated colors, and cannot meet the development requirements of colors that better display natural images

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