OPTICAL LENS, LIGHT-EMITTING DIODE OPTICAL COMPONENT AND LIGHT-EMITTING DIODE ROAD LAMP

• US 20130083521A1
• Filed: 10/03/2011
• Published: 04/04/2013
• Est. Priority Date: 10/03/2011
• Status: Active Grant

• Current Assignee: National Applied Research Laboratories (Government of The Republic of China)
• Original Assignee: Chi-Feng Lin, Po-Hua Yang, Yu-Bin Fang
• Inventors: YANG, Po-Hua, LIN, Chi-Feng, FANG, Yu-Bin
• Granted Patent: US 8,500,300 B2
• Time in Patent Office: Days
• US Class Current: 362/235
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

The invention is related to an optical lens, a light-emitting diode optical component and a light-emitting diode road lamp. The optical lens formed as a semi-spherical shape includes an uplifting spherical surface and a bottom surface corresponding to the spherical surface. The bottom surface includes an elongate recess concave to the spherical surface and formed with an inner surface corresponding to the spherical surface and two vertical side surfaces adjacent to the inner surface. The inner surface of the elongate recess includes a similar Gaussian distribution curve provided on a section parallel to the vertical side surfaces. A focus is contained in a center of the bottom surface. A light-emitting diode is disposed below the focus of the optical lens. The special outline structure of the optical lens can provide a uniform luminance distribution on an illuminating area.

Claims

1. An optical lens formed as a semi-spherical shape, comprising an uplifting spherical surface, a bottom surface corresponding to the spherical surface and a focus located at a center of the bottom surface, the bottom surface including an elongate recess concave to the spherical surface and formed with an inner surface corresponding to the spherical surface and two vertical side surfaces adjacent to the inner surface, the inner surface of the elongate recess including a curve provided on a section parallel to the vertical side surfaces and symmetrically distributed relative to a center point, to form a first curvature section gradually extended and concave to the spherical surface and a second curvature section smoothly connected to the first curvature section and concave to the elongate recess and to form the curve as a similar Gaussian distribution curve.

2. A light-emitting diode optical component, comprising:

an optical lens formed as a semi-spherical shape, comprising an uplifting spherical surface, a bottom surface corresponding to the spherical surface and a focus located at a center of the bottom surface, the bottom surface including an elongate recess concave to the spherical surface and formed with an inner surface corresponding to the spherical surface and two vertical side surfaces adjacent to the inner surface, the inner surface of the elongate recess including a curve provided on a section parallel to the vertical side surfaces and symmetrically distributed relative to a center point, to form a first curvature section gradually extended and concave to the spherical surface and a second curvature section smoothly connected to the first curvature section and concave to the elongate recess and to form the curve as a similar Gaussian distribution curve; and

a light-emitting diode disposed below the focus of the optical lens.

3. A light-emitting diode road lamp using the light-emitting diode optical component as claimed in claim 2, comprising a plurality of light-emitting diode optical components arranged in matrix and connected therebetween.

4. The light-emitting diode road lamp as claimed in claim 3, wherein the light-emitting diode optical components are arranged on a lamp seat.

5. The light-emitting diode road lamp as claimed in claim 3, wherein the optical lens of the light-emitting diode optical component is integrally formed on a connection plate.