Aspherical LED lens and light emitting device including the same
DCFirst Claim
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1. An aspherical lens, comprising:
- a light entrance plane configured to receive light emitted from a light source; and
a light exit plane configured to radiate the light received by the light entrance plane,wherein the light exit plane comprises;
protrusions disposed on a portion of a side surface of the light exit plane; and
a curved surface disposed on the side surface of the light exit plane,wherein the aspherical lens has a symmetrical structure.
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Abstract
Exemplary embodiments of the present invention relate to an aspherical light emitting diode (LED) lens and a light emitting device including the same. The aspherical LED lens includes a light exit plane concavely depressed near a central axis, a light entrance plane including a conical plane having a vertex located on the central axis, and a plurality of protrusions arranged on a portion of a side surface of the light exit plane. The aspherical LED lens has a radially symmetrical structure with respect to the central axis.
9 Citations
15 Claims
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1. An aspherical lens, comprising:
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a light entrance plane configured to receive light emitted from a light source; and a light exit plane configured to radiate the light received by the light entrance plane, wherein the light exit plane comprises; protrusions disposed on a portion of a side surface of the light exit plane; and a curved surface disposed on the side surface of the light exit plane, wherein the aspherical lens has a symmetrical structure. - View Dependent Claims (2, 3, 4, 15)
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5. A light emitting device, comprising:
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a substrate; a light emitting diode (LED) chip disposed on the substrate; and an aspherical LED lens disposed on the LED chip, the aspherical LED lens comprising a radially symmetrical structure with respect to a central axis of the aspherical LED lens, wherein the aspherical LED lens comprises; protrusions disposed on a portion of a side surface of the light exit plane; a curved surface disposed on the side surface of the light exit plane; and a linear section disposed between the curved surface and a central axis of the aspherical LED lens. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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14. A light emitting device, comprising;
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a substrate; a light emitting diode (LED) chip disposed on the substrate, fluorescent material disposed on the LED chip; an aspherical LED lens disposed on the LED chip, the aspherical LED lens comprising; different cross-sections respectively taken along a major axis and a minor axis of the aspherical LED lens; and protrusions disposed on a side surface of the aspherical LED lens.
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Specification