Display projectors
First Claim
1. A projection display, for displaying an image to an observer overlaid on an outside world scene viewed through the display, 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, the second waveguide being a combiner through which the observer can view an outside world scene along a line of sight with the image overlaid on the outside world scene; and
wherein the exit grating is arranged to diffract image bearing light out of the second waveguide element off axis to a normal axis of the second waveguide element and along said line of sight.
1 Assignment
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Accused Products
Abstract
The present invention is directed to a display which presents an image along a line of sight of an observer, such that the image is overlaid on a real world scene has a first waveguide and an image source device to inject the image into the first waveguide. The first waveguide has a first grating to direct the image internally and to output the image from the first waveguide. A second waveguide has a coupling grating to receive the image from the first waveguide and to direct the image along the second waveguide. The second waveguide has an exit grating to diffract the received image out of the second waveguide towards the observer. The exit grating diffracts the image out of the second waveguide off axis to a normal axis of the second waveguide.
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Citations
19 Claims
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1. A projection display, for displaying an image to an observer overlaid on an outside world scene viewed through the display, 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, the second waveguide being a combiner through which the observer can view an outside world scene along a line of sight with the image overlaid on the outside world scene; and wherein the exit grating is arranged to diffract image bearing light out of the second waveguide element off axis to a normal axis of the second waveguide element and along said line of sight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification