Colorful optical film, and preparation method and application structure thereof

Abstract

The application discloses a colorful optical film, and a preparation method and an application structure thereof. Since the pitches of cholesteric liquid crystal layers in the colorful optical film can be adjusted, the reflection wavelength of the cholesteric liquid crystal layers can be adjusted accordingly to achieve different color effects. In addition, when the second coating in the coating group is in a laminated structure of multiple cholesteric liquid crystal layers, the reflection spectrum can be broadened by superposing the multiple cholesteric liquid crystal layers having different pitches. Because the optical rotation of the cholesteric liquid crystal layers can be adjusted, the colorful optical film has a high reflectance and thus a stronger metallic luster. Compared with the inorganic thin film layer, the cholesteric liquid crystal layers can be selected, for example, by a roll-to-roll process capable of preparing a coating on a large area, which is advantageous for reducing the overall preparation difficulty and preparation cost of the colorful optical film. Furthermore, a color dye, a color changing dye or other functional dyes may be added to the cholesteric liquidcrystal layers to further enhance the color effect of the colorful optical film.

Description

technical field [0001] The present application relates to the technical field of optical film preparation, and more specifically, relates to a colorful optical film and its preparation method and application structure. Background technique [0002] Colorful optical film is an optical film with viewing angle-dependent colorful effects and metallic luster; that is, colorful optical films will show different colors or metallic luster effects under different viewing angles, bringing users more Rich visual effects. Therefore, colorful optical films are widely used in industries such as household appliances, automobiles and electronics. [0003] In recent years, with the development of In-Mold Decoration (IMD) technology and the improvement of consumer electronics product design requirements, higher requirements are put forward for the performance of colorful optical films. [0004] Traditional colorful optical films obtain different colors or metallic luster effects through org...

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Problems solved by technology

[0004] Traditional colorful optical films obtain different colors or metallic luster effects through organic film dyeing, ink printing, vacuum deposition of multi-layer inorganic films and other processes. However, the overall color presented by traditional dyeing and ink printing processes is single. The production efficiency of the process of depositing multi-layer inorganic films is extremely low, and it is difficult to meet the requirements of downstream products for color effects and large-scale production

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