Light emitting diode with a micro-structure lens having a ridged surface
AssigneeTSMC Solid State Lighting Ltd.
InventorsHsiao-Wen Lee, Shang-Yu Tsai, Pei-Wen Ko
Life of this patent
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Abstract
A light emitting diode (LED) with a micro-structure lens includes a LED die and a micro-structure lens. The micro-structure lens includes a convex lens portion, at least one concentric ridge structure surrounding the convex lens portion, and a lower portion below the convex lens portion and the at least one concentric ridge structure. The lower portion is arranged to be disposed over the LED die. A first optical path length from an edge of the LED die to a top center of the microstructure lens is substantially the same as a second optical path length from the edge of the LED die to a side of the micro-structure lens.
Claims20
A light emitting diode (LED) with a micro-structure lens, comprising:
- a LED die;
- a phosphor layer disposed over and vertically aligned with the LED die;
- and
- a micro-structure lens disposed over the LED die, the micro-structure lens including:
- a convex lens portion;
- and
- at least one concentric ridge structure surrounding the convex lens portion;
- wherein a first optical path length from an edge of the LED die to a top center of the micro-structure lens is substantially the same as a second optical path length from the edge of the LED die to a side of the micro-structure lens, and wherein the convex lens portion is wider than the LED die.
A light emitting diode (LED) with a micro-structure lens, comprising:
- a substrate having a reflective layer;
- a LED die disposed over the reflective layer;
- a phosphor coating disposed over the LED die, wherein the phosphor coating is vertically aligned with the LED die;
- and
- a micro-structure lens disposed over the LED die, the micro-structure lens including:
- a convex lens portion;
- and
- at least one concentric ridge structure surrounding the convex lens portion;
- wherein a first optical path length from an edge of the LED die to a top center of the micro-structure lens is substantially the same as a second optical path length from the edge of the LED die to a side of the micro-structure lens, and wherein the convex lens portion has a greater lateral dimension than the LED die.
A light emitting structure, comprising:
- a light-emitting diode (LED) die;
- a phosphor material disposed over and vertically aligned with the LED die;
- and
- a lens disposed over the LED die, the lens including:
- a convex lens surface;
- and
- a concentric ridge structure circumferentially surrounding the convex lens surface in a top view;
- wherein the convex lens surface is wider than the LED die, and wherein a side surface of the lens is curved, and wherein a first optical path length from an upper edge of the LED die to the convex lens surface is substantially the same as a second optical path length from a lateral edge of the LED die to the side surface of the lens.
Dependencies are inferred from the claim text.