Light guides and backlight systems incorporating prismatic structures and light redirectors
First Claim
Patent Images
1. A display comprising:
- an array of light modulators defining a display surface;
a light guide having front and rear surfaces and a plurality of geometric light redirectors formed within the light guide;
a front-facing prism sheet that includes a first layer of prisms;
a rear-facing prism sheet that includes a second layer of prisms; and
a diffuser between the front-facing prism sheet and the rear-facing prism sheet, each of the first layer of prisms and second layer of prisms being located between the light guide and the display surface, wherein the front-facing prism sheet faces the array of light modulators and the rear-facing prism sheet faces the light guide.
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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.
532 Citations
17 Claims
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1. A display comprising:
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an array of light modulators defining a display surface; a light guide having front and rear surfaces and a plurality of geometric light redirectors formed within the light guide; a front-facing prism sheet that includes a first layer of prisms; a rear-facing prism sheet that includes a second layer of prisms; and a diffuser between the front-facing prism sheet and the rear-facing prism sheet, each of the first layer of prisms and second layer of prisms being located between the light guide and the display surface, wherein the front-facing prism sheet faces the array of light modulators and the rear-facing prism sheet faces the light guide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of manufacturing a display, comprising:
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providing a light guide including a plurality of geometric light redirectors within the light guide; providing an array of light modulators to define a display surface; providing a first layer of prisms adjacent to the light guide; providing a second layer of prisms adjacent to the array of light modulators; aligning an orientation of at least one of the first layer of prisms and the second layer of prisms at a first angle with respect to an orientation of the geometric light redirectors of the light guide; and aligning the orientation of the first layer of prisms at a second angle with respect to the orientation of the second layer of prisms, wherein the second angle is up to 45 degrees.
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12. An apparatus, comprising:
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an array of light modulators defining a display surface; a light guide having a plurality of geometric light redirectors formed within the light guide; a first layer of prisms; a second layer of prisms; and each of the first layer of prisms and second layer of prisms being between the light guide and the display surface, wherein an orientation of prisms in the first layer of prisms is at an angle of up to 45 degrees with respect to the orientation of prisms in the second layer of prisms. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification