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LED based lamp and method for manufacturing the same

  • US 8,884,501 B2
  • Filed: 01/28/2011
  • Issued: 11/11/2014
  • Est. Priority Date: 06/30/2010
  • Status: Expired due to Fees
First Claim
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1. A light emitting diode (LED) based lamp comprising:

  • a heat sink having a receiving part;

    a LED module having at least one LED to provide light, the LED module provided in the receiving part of the heat sink;

    a lens to receive the light from the LED and to guide the light to a specific area away from the LED based lamp, the lens unit including a lens having a hollow part for providing the LED therein an outer circumference surface that is a sloped surface with a predetermined curvature for making a reflection of the light and a window around a circumference of the lens, wherein the lens projects toward the LED module;

    a reflector disposed between the lens unit and the LED module, the reflector to surround the outer circumference surface of the lens for reflecting the light;

    an adjustor on the lens outer circumference of the lens to minimize light from being transmitted to a region outside of the specific area;

    an electric unit for transforming external power to a power to be used for the LED module;

    a housing for housing the electric unit, the housing including fastening bosses; and

    a fastening member to couple the heat sink to the fastening bosses of the housing by passing through the receiving portion of the heat sink,wherein the adjustor has one of a different surface roughness than an inner area of the surface of the lens or a different light transmissivity than the inner area of the surface of the lens, wherein the adjustor is provided at a boundary of the lens and the window,wherein the lens unit and the reflector are coupled to the heat sink by a covering.

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