Reflection optical filter

Abstract

The invention is a reflection optical filter comprising a substrate and an optical film-layer structure arranged on the surface of the substrate. The optical film-layer structure comprises a reflection film, an interstitial film, a semi-transparent film and a transparent optical film; the reflection optical filter can filter the colorful light in the narrow band spectrum through the reflection and the interference among each layer of the optical film-layer structure so as to improve the color saturation of images.

Description

technical field [0001] The invention relates to an optical filter, and in particular to a reflective optical filter. Background technique [0002] With the advancement of modern video technology, liquid crystal display devices have been widely used on the display screens of consumer electronic products such as mobile phones, watches and personal digital assistants (PDAs). Under the trend of low power consumption research and development, reflective ) or transflective liquid crystal display devices have developed quite rapidly recently. [0003] Generally speaking, a reflective or transflective liquid crystal display device is configured with a color filter to achieve a color image display effect during reflective display. [0004] figure 1 It is a schematic diagram of an existing color filter. Please refer to figure 1 , the existing color filter 100 includes a substrate 110, a reflective film 120, a black matrix (black matrix) 130 and a plurality of red pigment resin pat...

AI Technical Summary

Problems solved by technology

[0005] Taking the red pigment resin pattern 140 as an example, the way to filter the light source is to partially absorb the green light and the blue light, and only let the red light pass through. In this way, after the light source passes through the color filter 100, only about 3 brightness, resulting in poor light utilization efficiency. In addition, the red, green and blue spectral resolutions filtered out by the red, green and blue pigment resin patterns 140, 150 and 160 are not ideal. Reduce color saturation when displaying images

[0006] In addition, as for the reflective color filter disclosed in No. WO9517690 patent document, it only uses the principle of Fabry-Perot optical cavity interference (optics scavity interference) to filter light. Wide, so that the colors presented are not narrow-band red, green and blue colors, so there is still a problem of poor spectral resolution, resulting in a decrease in color saturation

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