Patent ID: 11921299
Assignee: 3M INNOVATIVE PROPERTIES COMPANY
Field: Optics (Instruments)
Classification: CPC G  B | IPC B  G

Claim 0:
1. A display system for displaying a virtual image to a passenger of a vehicle, the display system comprising:
a display panel configured to emit a polarized image light having a first polarization state and at least one emission spectrum having a full width at half maxima (FWHM); and
a reflective polarizer configured to receive and reflect the polarized image light as a first reflected polarized image light, the reflective polarizer comprising a reflection spectrum comprising at least one reflection band having a FWHM, such that:
for a first light incident at a first predetermined angle from about 30 degrees to about 50 degrees with respect to a normal to a major surface of the reflective polarizer:
for the first polarization state, the reflective polarizer reflects at least about 60% of the first light for at least one same first wavelength within the FWHM of the at least one reflection band and within the FWHM of the at least one emission spectrum;
for the first polarization state, the reflective polarizer transmits at least about 50% of the first light for at least one same second wavelength outside the FWHM of the at least one emission spectrum and outside the FWHM of the at least one reflection band; and
for an orthogonal second polarization state, the reflective polarizer transmits at least about 60% of the first light for each wavelength in the FWHM of the at least one emission spectrum and the FWHM of the at least one reflection band;

wherein, for a second light incident at a second predetermined angle less than about 30 degrees with respect to the normal to the major surface of the reflective polarizer, and for each of the first and second polarization states, the reflective polarizer transmits at least about 50% of the second light for the at least first wavelength.