Waveguide holographic telltale display

Details Waveguide holographic telltale display Waveguide holographic telltale display

1992-12-22

1994-08-23

Lerner, Martin

Optical: systems and elements

Holographic system or element

Head up display

359 14, 359 25, 359 34, 359494, G02B 530, G02B 532, G02B 2728

Patent

active

053412303

ABSTRACT:
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.

REFERENCES:
patent: 4709613 (1988-12-01), Moss
patent: 4795223 (1989-01-01), Moss
patent: 4966426 (1990-10-01), Moss et al.
patent: 4973132 (1990-11-01), McDonald et al.
patent: 5101193 (1992-03-01), Smith et al.
patent: 5106174 (1992-04-01), Smith
patent: 5138470 (1992-08-01), Moss et al.
patent: 5196951 (1993-03-01), Wreede
patent: 5243449 (1993-09-01), Smith

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