Waveguide holographic telltale display

Details Waveguide holographic telltale display Waveguide holographic telltale display

G - Physics

02

B

G02B 27/00 (2006.01) G02B 27/01 (2006.01) G03H 1/22 (2006.01) G02B 5/30 (2006.01) G02B 6/00 (2006.01)

Patent

CA 2117479

A waveguide holographic telltale display for displaying images to a vehicle driver via the vehicle windshield. A light source injects light into the base of a clear inner windshield singlet. A mirror hologram between the inner and outer singlets confines a majority of the injected light to the inner singlet. An image hologram between the windshield singlets diffracts light out to the vehicle driver. A halfwave plate between the image hologram and the inner singlet reduces ghosting and allows the driver to view the images even through polarized sunglasses. IR light is blocked by a tinted outer singlet or a holographic solar coating. The display does not suffer from ambient turn from the sun, and the light source is hidden away from the vehicle dash.

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