There are provided a reflection film, a windshield glass, and a head-up display system capable of suppressing formation of double images of a display image. The reflection film has a linearly polarized light reflection layer in which optically anisotropic layers and isotropic layers are laminated and a polarization converting layer, and the polarization converting layer satisfies any of conditions below.(A) The polarization converting layer is a retardation layer in which the front retardation is 30 nm to 200 nm and the angle between a slow axis direction and a direction of the transmission axis of the linearly polarized light reflection layer is 35° or less.(B) The polarization converting layer is a layer in which a helical alignment structure of a liquid crystal compound is fixed, and the number of pitches x in the helical alignment structure and the film thickness y (unit μm) of the polarization converting layer satisfy all relational expressions below.0.1≤x≤1.0 (i)0.5≤y≤3.0 (ii)3000≤(1560×y)/x≤50000 (iii)
Reflection film, windshield glass, and head-up display system
2024-01-02
Patent
Elektronische Ressource
Englisch
IPC: | G09G Anordnungen oder Schaltungen zur Steuerung oder Regelung von Anzeigevorrichtungen mit statischen Mitteln zur Darstellung veränderlicher Informationen , ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS |
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