The invention discloses an optical film and a head-up display device, the optical film is used for reducing ambient light incident to an image generation unit of the display device, the optical film comprises a substrate, a diffusion structure located on a first side of the substrate and a light enhancement structure located on a second side of the substrate, and the first side and the second side of the substrate are opposite; light output by the image generation unit enters from the side, provided with the diffusion structure, of the optical film and converges when exiting from the light enhancement structure, and the light output by the image generation unit is enhanced by the optical film; ambient light enters from the side, provided with the light enhancement structure, of the optical film, part of the ambient light is reflected by the surface of the light enhancement structure, and part of the ambient light transmitted through the light enhancement structure and the substrate is diffused by the diffusion structure to weaken the intensity and then enters the image generation unit. According to the optical film, the ambient light incident to the image generation unit is reduced, the temperature rise of the image generation unit is delayed, and the influence of a sunlight backward flowing phenomenon on the image generation unit is reduced.

    本发明公开了一种光学膜片及抬头显示装置,该光学膜片用于减少入射至显示装置的图像生成单元的环境光线,光学膜片包括基底、位于基底第一侧的扩散结构以及位于基底第二侧的增光结构,基底的第一侧与第二侧相对;图像生成单元输出的光线,从光学膜片设置有扩散结构的一侧入射,在增光结构出射时会聚,光学膜片增强图像生成单元输出的光线;环境光线从光学膜片设置有增光结构的一侧入射,部分环境光线被增光结构的表面反射,经过增光结构和基底透射的部分环境光线,由扩散结构扩散削弱强度后入射至图像生成单元。该光学膜片减少了入射至图像生成单元的环境光线,延缓了图像生成单元的升温,降低了阳光倒灌现象对图像生成单元的影响。


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    Title :

    Optical film and head-up display device


    Additional title:

    一种光学膜片及抬头显示装置


    Contributors:
    WU HUIDONG (author) / WANG MING (author) / HUO MINGXIN (author) / QIU TIANYUAN (author)

    Publication date :

    2024-12-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES



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