The invention provides a reflective film, a windshield, and a head-up display system. The reflective film has high visible light transmittance, can improve the brightness of a display image, and has good transparency of appearance tone. The reflective film has a selective reflective layer having a cholesteric liquid crystal layer in which a cholesteric liquid crystal phase is fixed, the maximum value of natural light reflectance being 10-25% and the difference between the maximum value and the minimum value being 3% or more in the wavelength range of 400 nm or more and less than 500 nm and the wavelength range of 500 nm or more and less than 600 nm. In the wavelength range from 600 nm to 800 nm, the sum value of the wavelength bands in the region higher than the average value of the maximum value and the minimum value is from 20 nm to 80 nm, and in the wavelength range from 600 nm to 800 nm, the maximum value of the natural light reflectance is from 10% to 25%, and the sum value of the wavelength bands in the region higher than the average value of the maximum value and the minimum value is 120 nm or more.

    本发明提供一种反射膜、挡风玻璃及平视显示系统,该反射膜具有高可见光透射率且能够提高显示图像的亮度,外观色调的透明性良好。该反射膜具有选择反射层,该选择反射层具有固定胆甾醇型液晶相而成的胆甾醇型液晶层,在波长400nm以上且小于500nm的范围及波长500nm以上且小于600nm的范围的各范围内,自然光反射率的最大值为10%~25%,最大的极大值与最小的极小值之差为3%以上,高于最大值和最小值的平均值的区域的波长带的相加值为20nm~80nm,在波长600nm以上且800nm以下的范围内,自然光反射率的最大值为10%~25%,高于最大值和最小值的平均值的区域的波长带的相加值为120nm以上。


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    Title :

    Reflecting film, windshield and head-up display system


    Additional title:

    反射膜、挡风玻璃及平视显示系统


    Contributors:

    Publication date :

    2023-08-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    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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