LED illumination lamp

• US 7,255,460 B2
• Filed: 11/07/2005
• Issued: 08/14/2007
• Est. Priority Date: 03/23/2005
• Status: Expired due to Fees

• Current Assignee: Nuriplan Co., Ltd.
• Original Assignee: Nuriplan Co., Ltd.
• Inventors: Lee, Sang Woo
• Primary Examiner(s): Alavi; Ali
• Assistant Examiner(s): Sawhney; Hargobind S.
• Application Number:
  US11/269,307
• Publication Number:
  US 20060215408A1
• Time in Patent Office: 645 Days
• Field of Search: 362/231, 362/294
• US Class Current: 362/294
• CPC Class Codes: F21K 9/20 Light sources comprising attachment means
• CPC Class Codes: F21K 9/23 Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• CPC Class Codes: F21V 29/67 characterised by the arrangement of fans
• CPC Class Codes: F21V 29/677 the fans being used for discharging
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 9/08 for producing coloured light, e.g. monochromatic; for reducing intensity of light with provision for controlling the colour F21V9/40
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

In addition to the effect of harmonized illumination and increased heat radiation, a LED illumination lamp provides an improved effect of hermetic seal, anti-vibration and waterproofing between components and assures prolonged life span. The illumination lamp comprises a body adapted to be placed on or around a target illumination object, a LED module lying inside the body and a cover mounted on a seat part of the body. The LED module has a printed circuit board affixed to the body and a group of red, green and blue LEDs attached to the printed circuit. The cover is provided with a semitransparent color-producing part capable of harmonizing colors of the light emitted from the LEDs and an air passageway for permitting the heat generated from the LED module to dissipate to the outside.

Claims

1. A LED illumination lamp, comprising:

a body adapted to be placed on or around an target illumination object, the body having a central bore with an internal fixture shoulder, a seat part provided around a top end of the central bore, a plurality of support ears formed along a periphery of the body at a predetermined spacing, a plurality of heat radiation fins disposed in between the support ears substantially at an equal spacing and a plurality of air vents formed at one side of each of the support ears for allowing air to flow and circulate through the air vents;

a LED module having a printed circuit board affixed to the internal fixture shoulder of the body, a group of LEDs attached to the printed circuit board and consisting of red LEDs, green LEDs and blue LEDs, and an electric cable for supplying electric power to the LEDs and control signals to the printed circuit board; and

a cover mounted on the seat part of the body, the cover having a semitransparent color-producing part capable of harmonizing colors of the light emitted from the LEDs and prohibiting the LED module from exposure to the outside and an air passageway in communication with interstices existing between the heat radiation fins of the body for permitting the heat generated from the LED module to dissipate to the outside.

2. The LED illumination lamp as recited in claim 1, wherein the cover is provided with a plurality of fastening parts disposed along a periphery of the cover, each of the fastening parts consisting of a guide recess for receiving and guiding a bolt and a through-hole adjoining to the guide recess and in alignment with a thread hole formed through the seat part of the body for allowing the bolt to be inserted therethrough.

3. The LED illumination lamp as recited in claim 1, wherein the support ears are spaced apart at an angular spacing of 72 degrees, the cover is made of polycarbonate resin, and the color-producing part of the cover is formed by a sandblasted mold.

4. The LED illumination lamp as recited in claim 1, wherein a white epoxy layer is coated on a top surface of the printed circuit board of the LED module for the sake of waterproofing, insulation and light reflection.

5. The LED illumination lamp as recited in claim 1, wherein a heat radiation plate is attached to a bottom surface of the printed circuit board and secured to the internal fixture shoulder of the body so that the heat generated from the LEDs can be conducted to the outside through the heat radiation plate.

6. The LED illumination lamp as recited in claim 1, wherein the color-producing part of the cover is provided on its bottom side with a cylindrical protrusion corresponding to an annular border part of the body, the cylindrical protrusion having a gasket kept in sealing contact with the border part of the body, and the cover is provided on its bottom periphery with an edge rim making close contact with the seat part of the body and the top surfaces of the support ears and the heat radiation fins.

7. The LED illumination lamp as recited in claim 6, wherein a reception groove is formed along a bottom end of the edge rim of the cover and an O-shaped seal ring is fitted to the reception groove, the seal ring making air-tight contact with the seat part of the body.

8. The LED illumination lamp as recited in claim 1, wherein an epoxy protection layer of black color is provided on an inner bottom side of the body for the purpose of waterproofing, light-shielding and concealment of components.

9. The LED illumination lamp as recited in claim 1, wherein an insulation film is bonded to a rear surface of the printed circuit board of the LED module for insulating the printed circuit board from the body and the heat radiation plate.