Optical: systems and elements – Holographic system or element – Head up display
Patent
1995-09-29
1998-03-03
Dzierzynski, Paul M.
Optical: systems and elements
Holographic system or element
Head up display
359 22, 359 24, 359 32, 359 34, 40547, G03H 100
Patent
active
057241619
ABSTRACT:
Apparatus comprising a decal disposed on an interior surface of a window and a light source for projecting light onto the to display an image outside of the vehicle. The decal comprises a protective layer having a hologram layer disposed thereon that is designed to transmit a holographic image in a predetermined viewing direction. An opaque and clear mask layer into which an icon is incorporated may be secured to the hologram layer to provide a two-dimensional image. The hologram layer is illuminated by sunlight, skylight, or a light source and projects an image to a viewer at a predefined direction. During the day, the icon is viewable because light transmits through the clear portions of the mask layer is clear, and is blocked by opaque portions of the mask layer that define the icon. At night, the decal is illuminated by light from a light source 18, or an exterior or ambient light source to produce an image viewable by the observer. The decal may be designed to direct diffracted light to specific areas where viewability is desired, thereby creating images that are brighter to observers than may normally be achieved.
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Pyburn Robert Allan
Smith Ronald T.
Delco Electronics Corp.
Dzierzynski Paul M.
Funke Jimmy L.
Hughes Electronics Corp.
Schuberg Darren E.
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