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

Claim 8:
9. 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 substantially distinct blue, green, and red emission spectra having respective blue, green, and red full widths at half maxima (FWHMs); and
a reflective polarizer configured to receive and reflect the polarized image light as a first reflected polarized image light, the first reflected polarized image light configured to be reflected toward the passenger after reflection from at least a windshield of the vehicle, 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, the reflective polarizer has:
an average total reflectance of greater than about 60% for the first polarization state across each of the blue, green and red FWHMs;
for the first polarization state, a transmittance of at least about 50% for at least one wavelength between the FWHMs of the blue and green emission spectra, and for at least one other wavelength between the FWHMs of the green and red emission spectra; and
for an orthogonal second polarization state, an average total transmittance of greater than about 70% across a visible wavelength range comprising at least each of the blue, green and red FWHMs;

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 has an average total transmittance of at least about 50% across each of the blue, green and red FWHMs.