Light emitting diode with a micro-structure lens having a ridged surface

US8969894B2 · kind B2 · utility

Assignee

• TSMC SOLID STATE LIGHTING LTD. · TW

Inventors

• Hsiao-Wen Lee · Hsinchu, TW
• Shang-Yu Tsai · Hsinchu, TW
• Pei-Wen Ko · Taichung, TW

Key dates

• Filing date: Apr 15, 2011
• Grant date: Mar 3, 2015
• Expiry date: Dec 4, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/856

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.