Waveguide holographic telltale display
First Claim
1. A waveguide holographic telltale display for projecting images via a vehicle windshield comprising inner and outer windshield singlets, comprising:
- means for injecting light into the base of said inner windshield singlet;
a telltale image hologram disposed at a predetermined area between said singlets for diffracting light injected into said inner singlet out toward the vehicle driver; and
a holographic mirror disposed between said inner and outer singlets for confining said injected light from entering said outer singlet, and wherein said holographic mirror does not extend over said predetermined area.
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Accused Products
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.
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Citations
37 Claims
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1. A waveguide holographic telltale display for projecting images via a vehicle windshield comprising inner and outer windshield singlets, comprising:
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means for injecting light into the base of said inner windshield singlet; a telltale image hologram disposed at a predetermined area between said singlets for diffracting light injected into said inner singlet out toward the vehicle driver; and a holographic mirror disposed between said inner and outer singlets for confining said injected light from entering said outer singlet, and wherein said holographic mirror does not extend over said predetermined area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A waveguide holographic telltale display for projecting images via a vehicle windshield comprising inner and outer windshield singlets, comprising:
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means for injecting light into the base of said inner windshield singlet; a telltale image hologram disposed at a predetermined area between said singlets for diffracting light injected into said inner singlet out toward the vehicle driver; a holographic mirror disposed between said inner and outer singlets for confining said injected light from entering said outer singlet, and wherein said holographic mirror does not extend over said predetermined area; and a halfwave plate disposed between said hologram and said inner singlet for reduction of ghost telltale images. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A waveguide holographic display, comprising:
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a vehicle windshield comprising a clear inner singlet and an outer singlet; means for injecting light into said inner singlet; an image hologram disposed at a predetermined display area between said singlets for diffracting light injected into said inner singlet toward a vehicle occupant to form an image; holographic mirror means disposed between said inner and outer singlets between said light injecting means and said display area for confining said light from entering said outer singlet, wherein light travels within said inner singlet by total internal reflection from said light injecting means to said display area; and a halfwave layer disposed between said image hologram and said inner singlet for reduction of ghost images. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 30, 31, 32, 33)
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29. The display of 28 further comprising a polyvinyl butyral (PVB) layer disposed between said halfwave layer and said image hologram.
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34. A waveguide holographic display, comprising:
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a transparent light waveguide for transmitting light by total internal reflection along the interior of said waveguide from a light input area to an image area, said waveguide having opposed first and second surfaces for creating opposed air/waveguide interfaces which are capable of totally reflecting light incident on said interfaces from within said waveguide; a light source for injecting light into said waveguide at said light input area, wherein said injected light propagates along the interior of said waveguide from said input area to said image area; an image hologram disposed against said first waveguide surface at said image area for diffracting light injected into said waveguide toward said second surface at angles to permit said diffracted light to transmit through said second surface and out of said waveguide; and a halfwave layer disposed adjacent said second surface at said image area for reduction of ghost images. - View Dependent Claims (35, 36, 37)
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Specification