System and method for a lens and phosphor layer
First Claim
Patent Images
1. An optical system comprising:
- an LED disposed in a cavity defined by a base and one or more cavity sidewalls;
a lens further comprising;
a lens body having an entrance face substantially parallel to a primary emitting plane the LED; and
a layer of phosphor between the entrance face of the lens body and the LED such that light emitted from the LED will be incident on the phosphor and down converted before entering the lens body through the entrance face;
wherein the one or more cavity sidewalls are shaped to direct light incident on the one or more cavity sidewalls to the entrance face of the lens, wherein an encapsulant at least partially fills the cavity, wherein the encapsulant forms a reflector around the LED through surface tension,wherein the lens is positioned so that the phosphor is separated from the LED by a gap.
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Abstract
Embodiments disclosed herein provide optical systems utilizing photon conversion materials in conjunction with a light source and an LED. An LED can be positioned in a cavity defined by a base and one or more sidewalls. Phosphors can be disposed on the entrance face of a lens between the entrance face to the lens body and the LED so that light emitted from the LED will be incident on the phosphor and down converted before entering the lens body through the entrance face. The lens can positioned so that the phosphors are separated from the LED by a gap.
610 Citations
16 Claims
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1. An optical system comprising:
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an LED disposed in a cavity defined by a base and one or more cavity sidewalls; a lens further comprising; a lens body having an entrance face substantially parallel to a primary emitting plane the LED; and a layer of phosphor between the entrance face of the lens body and the LED such that light emitted from the LED will be incident on the phosphor and down converted before entering the lens body through the entrance face; wherein the one or more cavity sidewalls are shaped to direct light incident on the one or more cavity sidewalls to the entrance face of the lens, wherein an encapsulant at least partially fills the cavity, wherein the encapsulant forms a reflector around the LED through surface tension, wherein the lens is positioned so that the phosphor is separated from the LED by a gap. - View Dependent Claims (3, 4, 5)
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2. The optical system of 1, wherein the one or more cavity sidewalls are reflective.
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6. An optical system comprising:
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an LED disposed in a cavity defined by a base and one or more cavity sidewalls; a lens further comprising; a lens body having an entrance face substantially parallel to a primary emitting plane the LED; and a layer of phosphor between the entrance face of the lens body and the LED such that light emitted from the LED will be incident on the phosphor and down converted before entering the lens body through the entrance face; and an encapsulant that at least partially fills the cavity, wherein the encapsulant forms a reflector around the LED through surface tension, wherein the lens is positioned so that the phosphor is separated from the LED by a gap, wherein the one or more cavity sidewalls are shaped to direct light incident on the one or more cavity sidewalls to an entrance face of the lens, wherein the lens body is shaped to emit light with a uniform distribution in a desired half-angle and to conserve brightness. - View Dependent Claims (7)
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8. An optical system comprising:
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a submount; an array of LEDs mounted to the submount; a housing, the housing at least partially defining a set of LED cavities in cooperation with the submount and a set of lens cavities, each lens cavity open to a corresponding LED cavity and sized to accommodate a lens; a set of lenses disposed in the lens cavities, each lens comprising; a lens body having an entrance face proximate to the opening to the corresponding LED cavity; and a layer of phosphors between the entrance face and a corresponding LED such that light emitted by a corresponding LED will be down converted before entering the lens body; wherein the entrance face of each lens is positioned a distance from a corresponding LED. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification