Optical loss structure integrated in an illumination apparatus
First Claim
1. A display device comprising:
- a plurality of display elements;
an optical propagation region including a light guide in which light is guided via total internal reflection, said optical propagation region further including turning features configured to redirect said light out of said optical propagation region and towards the plurality of display elements; and
an optical isolation layer coupled to the optical propagation region, the optical isolation layer positioned between the plurality of display elements and the optical propagation region, the optical isolation layer positioned forward of a viewing side of the display elements, the optical isolation layer including a matrix and microstructure, wherein the matrix extends from the top to the bottom of the optical isolation layer, wherein the microstructure is configured to provide an optical loss structure disposed forward of the viewing side of the display elements, at least a portion of the optical isolation layer having an index of refraction less than an index of refraction of the optical propagation region, the at least a portion of the optical isolation layer configured such that light is totally internally reflected in said optical propagation region without utilizing an air gap layer disposed adjacent to the optical propagation region and between the optical propagation region and the display elements, wherein the optical isolation layer is adjacent to the display elements and adjacent to the optical propagation region.
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Accused Products
Abstract
Various embodiments of a display device described herein include an optical propagation region, at least one optical loss structure, an optical isolation layer, and a plurality of display elements. The propagation region includes a light guide in which light is guided via total internal reflection and turning features configured to redirect the light out of the propagation region. The loss structure would disrupt the total internal reflection of at least some of the light guided within the propagation region if disposed directly adjacent thereto. The optical isolation layer includes a non-gaseous material between the propagation region and the loss structure, and is configured to increase an amount of light that is totally internal reflected in the propagation region. The plurality of display elements are positioned to receive the light redirected out of the propagation region. The loss structure is positioned between the plurality of display elements and the propagation region.
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Citations
38 Claims
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1. A display device comprising:
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a plurality of display elements; an optical propagation region including a light guide in which light is guided via total internal reflection, said optical propagation region further including turning features configured to redirect said light out of said optical propagation region and towards the plurality of display elements; and an optical isolation layer coupled to the optical propagation region, the optical isolation layer positioned between the plurality of display elements and the optical propagation region, the optical isolation layer positioned forward of a viewing side of the display elements, the optical isolation layer including a matrix and microstructure, wherein the matrix extends from the top to the bottom of the optical isolation layer, wherein the microstructure is configured to provide an optical loss structure disposed forward of the viewing side of the display elements, at least a portion of the optical isolation layer having an index of refraction less than an index of refraction of the optical propagation region, the at least a portion of the optical isolation layer configured such that light is totally internally reflected in said optical propagation region without utilizing an air gap layer disposed adjacent to the optical propagation region and between the optical propagation region and the display elements, wherein the optical isolation layer is adjacent to the display elements and adjacent to the optical propagation region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 26, 27, 28, 29, 30, 31, 32, 33)
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24. A method of manufacturing a display device, the method comprising:
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providing an optical propagation region configured to guide light via total internal reflection between top and bottom surfaces of the optical propagation region, wherein providing the optical propagation region includes; providing a substrate, wherein the optical propagation region includes the substrate; and disposing turning features over a first side of the substrate, the turning features configured to redirect the light out of the optical propagation region; coupling an optical isolation layer to a second side of the substrate, the optical isolation layer including a matrix and microstructure, wherein the matrix extends from the top to the bottom of the optical isolation layer, wherein the microstructure is configured to provide an optical loss structure and disposing a plurality of display elements over the optical isolation layer on the second side of the substrate wherein the substrate provides support to the display elements during fabrication wherein the optical isolation layer is positioned forward of a viewing side of the display elements; wherein at least a portion of the optical isolation layer has an index of refraction less than an index of refraction of the optical propagation region, the at least a portion of the optical isolation layer configured such that light is totally internally reflected in the optical propagation region without utilizing an air gap layer disposed adjacent to the optical propagation region and between the optical propagation region and the display elements. - View Dependent Claims (25, 34, 35, 36, 37, 38)
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Specification