LED based lamp and method for manufacturing the same
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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Abstract
A light emitting diode (LED) based lamp is provided that may include a housing, a LED module having at least one LED to emit light, and a lens to receive the light from the LED and to guide the light to a specific area. An outer circumference of the lens may have a different surface roughness than an inner surface of the lens or may have a different light transmissivity than the inner surface of the lens. The outer circumference of the lens may minimize light from being transmitted to a region outside the specific area.
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Citations
17 Claims
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1. A light emitting diode (LED) based lamp comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A light emitting diode (LED) based lamp comprising:
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a heat sink having a receiving part; a LED module having at least one LED in the receiving part; a lens unit having a lens and a window, the lens to guide the light to a specific area away from the LED based lamp, the lens including a hollow part to receive the LED, the hollow part including an edge, and wherein the lens has a sloped surface that slopes from the edge of the hollow part to the window so as to provide a curvature, and the window is an outward extension from a circumference of the lens; a reflector disposed between the lens unit and the LED module, the reflector provided at an outer circumference surface of the lens for reflecting the light, wherein the lens unit and the reflector are coupled to the heat sink by a covering; an adjustor on a front surface of the lens unit to minimize light from being transmitted to a region outside of the specific area, wherein the adjustor has a different surface roughness than an inner surface of the lens; an electric unit to transform external power to a power to be used for the LED module; a housing to house the electric unit, the housing including fastening bosses; and a fastening member to couple the heat sink to the fastening bosses by the fastening member being provided through the receiving portion of the heat sink. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification