WINDSHIELD GLASS, HEAD-UP DISPLAY SYSTEM, AND HALF-MIRROR FILM

A head-up display system includes: a projection image display portion; a circularly polarized light reflection layer and a λ/2 retardation layer which are included in the projection image display portion in which the circularly polarized light reflection layer includes four or more cholesteric liqui...

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Bibliographic Details
Main Authors ANZAI, Akihiro, Katoh, Shunya
Format Patent
LanguageEnglish
Published 01.08.2019
Subjects
ACCESSORIES THEREFOR
APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM
CINEMATOGRAPHY
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING
ELECTROGRAPHY
FREQUENCY-CHANGING
HOLOGRAPHY
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICAL LOGIC ELEMENTS
OPTICS
PHOTOGRAPHY
PHYSICS
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Summary:A head-up display system includes: a projection image display portion; a circularly polarized light reflection layer and a λ/2 retardation layer which are included in the projection image display portion in which the circularly polarized light reflection layer includes four or more cholesteric liquid crystal layers and one layer of the four or more cholesteric liquid crystal layers has a center wavelength of selective reflection at 350 nm or more and less than 490 nm, the windshield glass; and a projector.
Bibliography:Application Number: US201916383207