A kind of color filter and its manufacturing method, display device

Abstract

The invention discloses a color filter, a manufacturing method thereof, and a display device. A display device with a large color gamut can be realized by using the color filter. The color filter includes: at least four pixel units, each pixel unit includes a color filter layer, and the four pixel units are respectively a first pixel unit, a second pixel unit, a third pixel unit and a fourth pixel unit unit, a first color filter layer is formed in the first pixel unit, a second color filter layer is formed in the second pixel unit, a third color filter layer is formed in the third pixel unit, and a third color filter layer is formed in the fourth pixel unit There is a fourth color filter layer, and the fourth color filter layer is formed by superimposing any two materials of the first color filter layer, the second color filter layer and the third color filter layer.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a color filter, a manufacturing method thereof, and a display device. Background technique [0002] As a color image output device, the display device's ability to reproduce colors - color gamut - is its main performance index. The higher the color gamut of the display device, the higher the ability of the display device to reproduce colors, otherwise the lower the ability of the display device to reproduce colors. At present, the pursuit of high color gamut display devices is the goal pursued by every manufacturer. [0003] The color gamut is the range of color expression. Generally, the color gamut of a color display device is the area of ​​the primary color triangle formed by its three primary colors in the chromaticity diagram. [0004] The color gamut of existing display devices is mainly determined by color filters, such as figure 1 As shown, a pixel area 100 of an exis...

AI Technical Summary

Problems solved by technology

[0006] One of the implementation methods is: use quantum dot materials to make color filters, but the cost of quantum dot materials is higher than that of commonly used photoresist materials, which is not conducive to the realization of low-cost high-performance display devices

[0007] Another implementation is: the backlight uses three backlight diodes (LEDs) of red, green and blue, but this design method will increase the cost of the backlight, and is also not conducive to the realization of low-cost high-performance display devices

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