Light guides and backlight systems incorporating prismatic structures and light redirectors
First Claim
Patent Images
1. A display comprising:
- a rear facing reflective layer including a plurality of apertures;
a light guide having front and rear surfaces and a plurality of geometric light redirectors formed within the light guide;
a rear-facing plurality of prisms;
a front-facing plurality of prisms; and
each of the rear-facing and front-facing plurality of prisms being located between the light guide and the rear facing reflective layer.
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Accused Products
Abstract
Improved apparatus and method for collecting and directing light from a source via a light guide and modulated display assembly in an efficient manner through the design and use of prismatic optical structures, diffusers and/or light redirectors.
538 Citations
30 Claims
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1. A display comprising:
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a rear facing reflective layer including a plurality of apertures; a light guide having front and rear surfaces and a plurality of geometric light redirectors formed within the light guide; a rear-facing plurality of prisms; a front-facing plurality of prisms; and each of the rear-facing and front-facing plurality of prisms being located between the light guide and the rear facing reflective layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of forming an image comprising:
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providing a rear facing reflective layer including a plurality of apertures in proximity to an illumination system including a front-facing prism sheet, a rear-facing prism sheet and a light guide positioned behind the rear-facing prism sheet, the light guide having front and rear surfaces and a plurality of geometric light redirectors formed within the light guide; providing one or more light sources configured to illuminate the light redirectors; reflecting light off the plurality of light redirectors to within a range of angles about a display axis perpendicular to the reflective aperture layer; and redirecting the light reflected into the range of angles by the light redirectors towards the reflective aperture layer, by both of the front-and rear-facing prism sheets, such that the reflected light remains within the same range of angles. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A method of manufacturing a display assembly, comprising:
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providing a light guide including a plurality of geometric light redirectors formed within the light guide; providing a rear-facing plurality of prisms adjacent to the light guide; providing a front-facing plurality of prisms adjacent to the rear-facing plurality of prisms; and aligning an orientation of at least one of the rear-facing plurality of prisms and the front-facing plurality of prisms with respect to an orientation of the geometric light redirectors of the light guide to adjust the intensity of emitted light normal to the display assembly. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification