Pixel structure, OLED (Organic Light-Emitting Diode) display panel comprising pixel structure, and vapor deposition mask

Abstract

The invention provides a pixel structure, an OLED (Organic Light-Emitting Diode) display screen comprising the pixel structure, and an evaporation mask; the length-width ratio of sub-pixels in the pixel structure is set to be smaller than 1.5:1, which indicates that the shape of the sub-pixel is square or is approximately square, and therefore, maximum apertures can be ensured. Correspondingly, inorder to ensure that the sub-pixel is square or approximately square, four-pixel units (12-sub-pixels ) in the prior art are converted into three pixel units (9 sub-pixels), and the light-emitting areas of the sub-pixels of the same color in adjacent odd-numbered rows and even-numbered rows are staggered; evaporation apertures in the evaporation mask are staggered, and therefore, the strength ofthe evaporation mask can be improved, problems such as the warping and cracking of the evaporation mask can be avoided, and the defects of the spread and shift of the evaporation film layer can be reduced; the shapes and sizes of the first sub-pixel, the second sub-pixel, and the third sub-pixel are identical, and intervals on the evaporation mask are identical, and therefore, the strength of theevaporation mask can be further improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a pixel structure, an OLED display containing the pixel structure, and an evaporation mask. Background technique [0002] OLED (Organic Light-Emitting Diode, Organic Light-Emitting Diode) is an active light-emitting device. Compared with the traditional LCD (Liquid Crystal Display, liquid crystal display) display method, the OLED display technology does not require a backlight and has the characteristic of self-luminescence. OLED uses a thin film of organic material and a glass substrate. When an electric current passes through it, the organic material will emit light. Therefore, OLED displays can significantly save power, can be made lighter and thinner, can withstand a wider range of temperature changes than LCD displays, and have a larger viewing angle. OLED display is expected to become the next-generation flat-panel display technology after LCD, and it is one of the most ...

AI Technical Summary

Problems solved by technology

because figure 1 The sub-pixels of the same color in the arrangement mode are arranged up and down in alignment, so the evaporation openings 108 of the FMM must also be arranged in alignment, which makes the connection bridge (bridge) between two vertically adjacent evaporation openings 108 at risk of disconnection

Moreover, the evaporation opening 108 of the FMM needs to correspond to a predetermined pixel position. According to the existing pixel arrangement method, the alignment space between the FMM and the sub-pixel area will be reduced, and defects such as lack of color or color mixing may occur.

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