Color filter, display panel and display device

Abstract

The invention discloses a color filter, a display panel and a display device. The color filter is divided into a plurality of filter zones in different colors. The color filter comprises a metal grating and a planar optical waveguide arranged successively in the outgoing direction of the light wherein the metal grating comprises a plurality of grating periods extending in the same direction, and the grating periods corresponding to the filter zones in different colors share different widths. The filter lengths of the filter zones lengthen along with increase in the widths of the grating periods corresponding to the filter zones. According to the invention, through the change in the widths of the grating periods by the metal grating, it is possible to realize the light filtering of different colors, and the planar optical waveguide performs the filtering for a second time to the already filtered light in different colors so that the frequency spectrum half-peak width of the light in different colors becomes narrow, that the purity of light color is increased, and that the color saturation of the colors is increased. Therefore, the color display contrast is increased in display.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a color filter, a display panel and a display device. Background technique [0002] With the rapid development of display technology, users have higher and higher requirements on the color display effect of display devices. Compared with liquid crystal display devices, Organic Light Emitting Diode (OLED) display devices have excellent characteristics such as self-illumination, high contrast, fast response speed, and wide viewing angle, and are increasingly valued by the industry. [0003] Currently, OLED display panels display colors in the following ways. One is a color mode in which the sub-pixels of each color emit light independently, which can be realized by arranging the vertical three primary colors and the horizontal three primary colors. The above-mentioned color mode needs to arrange the three primary colors by vapor deposition on a fine metal mask. In addition to th...

AI Technical Summary

Problems solved by technology

In addition, liquid crystal display panels, color light-emitting diodes and other fields can also use the above-mentioned backlight combined with the light-emitting mode of the color filter, but the light transmittance and light color purity of the color filter are relatively low, resulting in color saturation of the display panel. Ratio, contrast, brightness, etc. need to be further improved

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