Light-emitting diode component having a light direction-changing unit and related light direction-changing unit and module

• US 7,390,109 B2
• Filed: 09/12/2005
• Issued: 06/24/2008
• Est. Priority Date: 05/18/2005
• Status: Active Grant

• Current Assignee: Lite-On Technology Corporation
• Original Assignee: Lite-On Technology Corporation
• Inventors: Lee, Po-Hsien, Li, Zhi-Feng, Wu, Yung-Fu
• Primary Examiner(s): Payne; Sharon E
• Application Number:
  US11/162,466
• Publication Number:
  US 20060262538A1
• Time in Patent Office: 1,016 Days
• Field of Search: 362/296, 362/800, 362/309, 362/327, 362/333, 362/335, 362/338, 362/545, 362/555, 362/311, 257/98, 257/99, 257/100, 313/512
• US Class Current: 362/296.07
• CPC Class Codes: H01L 33/54 having a particular shape
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A light-emitting diode (LED) component includes a circuit board, an LED chip installed on the circuit board for emitting light, and a light direction-changing unit. The LED chip is composed of a plurality of light-emitting points. The unit has a covering surface covering the LED chip, and a reflecting surface having a plurality of reflecting points. A smallest included angle of a plurality of included angles between a normal line of at least one of the reflecting points and a plurality of connection lines passing through the reflecting point and the light-emitting points is larger than sin−1(1/n), where n is the reflection index of the light direction-changing unit.

Claims

1. A light-emitting diode (LED) component comprising:

a circuit board;

an LED chip installed on the circuit board for emitting light, the LED chip comprising a plurality of light-emitting points; and

a light direction-changing unit for changing direction of the light emitted by the LED chip, the light direction-changing unit comprising;

a covering surface for covering the LED chip; and

a reflecting surface comprising a plurality of reflecting points, a smallest included angle of a plurality of included angles between a normal line of at least one of the reflecting points and a plurality of connection lines passing through the reflecting point and the light-emitting points being larger than sin<sup>−

1</sup>(1/n), where n is a refraction index of the light direction-changing unit, wherein the reflecting surface of the light direction-changing unit comprises a conical indentation reflecting surface that is a curved surface formed by an arc line spinning around its tangent line.