Projection displays
First Claim
Patent Images
1. A projection display, for displaying an image to an observer, including:
- a first waveguide element arranged to be light transmissive;
an image-providing light source device arranged to generate an image and to inject image bearing light into the first waveguide element;
a first grating associated with the first waveguide element arranged to direct the image bearing light internally along the first waveguide element and through which the image bearing light is outputted from the first waveguide element;
a second waveguide element arranged to be light transmissive and transparent that includes a coupling grating arranged to receive the image bearing light from the first waveguide element and to direct the image bearing light along the second waveguide element;
the second waveguide element further includes an exit grating arranged to diffract received image bearing light out of the second waveguide element towards an observer; and
wherein the image-providing light source device is arranged to divide the image into two or more sub-images and inject each sub-image into a different input region of the first waveguide element.
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Abstract
A projection display which includes first and second waveguide elements, wherein the first waveguide element has a two input regions for injecting image bearing light into the first waveguide element. In this manner, the total field of view of the image to be displayed at the second waveguide element is divided into two sub-images prior to injection of one sub-image into one input region and the other sub-image into the other input region of the first waveguide element. This results in a smaller first waveguide element, thereby reducing obscuration of an observers view of a forward scene over which to the image to be displayed is overlaid.
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Citations
21 Claims
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1. A projection display, for displaying an image to an observer, including:
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a first waveguide element arranged to be light transmissive; an image-providing light source device arranged to generate an image and to inject image bearing light into the first waveguide element; a first grating associated with the first waveguide element arranged to direct the image bearing light internally along the first waveguide element and through which the image bearing light is outputted from the first waveguide element; a second waveguide element arranged to be light transmissive and transparent that includes a coupling grating arranged to receive the image bearing light from the first waveguide element and to direct the image bearing light along the second waveguide element; the second waveguide element further includes an exit grating arranged to diffract received image bearing light out of the second waveguide element towards an observer; and wherein the image-providing light source device is arranged to divide the image into two or more sub-images and inject each sub-image into a different input region of the first waveguide element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification