LIGHT EMITTING DIODE FLOODLIGHT

• US 20120155077A1
• Filed: 03/02/2011
• Published: 06/21/2012
• Est. Priority Date: 12/17/2010
• Status: Abandoned Application

• Current Assignee: Yuyang Dnu Co., Ltd.
• Original Assignee: Yuyang Dnu Co., Ltd.
• Inventors: KIM, Sang Ok, KIM, Byung Oh, CHO, Min Jin, LEE, In Su
• Application Number:
  US13/038,780
• Publication Number:
  US 20120155077A1
• Time in Patent Office: Days
• US Class Current: 362/235
• CPC Class Codes: F21S 8/036 by means of a rigid support, e.g. bracket or arm
• CPC Class Codes: F21V 15/01 Housings, e.g. material or assembling of housing parts F21V15/02 takes precedence housings forming signs or letters G09F13/04
• CPC Class Codes: F21V 21/116 Fixing lighting devices to arms or standards F21V21/002 takes precedence
• CPC Class Codes: F21V 21/30 Pivoted housings or frames
• CPC Class Codes: F21V 23/007 enclosed in a casing
• CPC Class Codes: F21V 23/02 the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 29/713 in direct thermal and mechanical contact of each other to form a single system
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 7/048 with facets structure
• CPC Class Codes: F21V 7/09 with a combination of different curvatures
• CPC Class Codes: F21Y 2107/40 on the sides of polyhedrons, e.g. cubes or pyramids
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A light emitting diode floodlight includes a hollow housing, a lens, a cover, a light source, an illumination reflector, an intermediate portion, and a power source. The cover is coupled to the end of the housing and configured to hold and support the lens. The light source has a pyramidal frustum-shaped portion installed at an opposite end of the housing. The illumination reflector is installed within the housing so as to surround a periphery of the pyramidal frustum-shaped portion of the light source. The intermediate portion is connected to a first heat sink of the light source and has a second heat sink on an outer peripheral surface thereof. The power source has a power supply electrically connected to the light source.

Claims

1. A light emitting diode floodlight, comprising:

a hollow housing;

a lens provided at one end of the housing;

a cover coupled to the end of the housing and configured to hold and support the lens;

a light source having a pyramidal frustum-shaped portion installed at an opposite end of the housing and accommodated within the housing, a plurality of PCBs mounted onto the pyramidal frustum-shaped portion, a plurality of light emitting diodes arranged on and mounted to the PCBs, and a first heat sink exposed to the outside of the housing on an opposite side of the pyramidal frustum-shaped portion;

an illumination reflector installed within the housing so as to surround a periphery of the pyramidal frustum-shaped portion of the light source;

an intermediate portion connected to the first heat sink of the light source and having a second heat sink on an outer peripheral surface thereof; and

a power source having a power supply electrically connected to the PCBs of the light source.

2. The light emitting diode floodlight as claimed in claim 1, wherein the power source is connected to the intermediate portion on an opposite side of the light source.

3. The light emitting diode floodlight as claimed in claim 2, wherein the power source includes a hollow body, a third heat sink formed on an outer peripheral surface of the body, a power supply installed within the body, and a cover separably provided on an opposite side of the intermediate portion.

4. The light emitting diode floodlight as claimed in claim 1, wherein the pyramidal frustum-shaped portion includes a polygonal upper surface located at the center thereof and a plurality of trapezoidal inclined surfaces extending from edges of the polygonal upper surface while being inclined, and protrudes from one side of the light source.

5. The light emitting diode floodlight as claimed in claim 4, wherein a bracket configured to couple a connecting member for installing the light emitting diode floodlight on a column or a wall is provided on the opposite side of the light source.

6. The light emitting diode floodlight as claimed in claim 4, wherein an angle between the polygonal upper surface and the trapezoidal inclined surfaces of the pyramidal frustum-shaped portion is within a range of 120 to 150 degrees.

7. The light emitting diode floodlight as claimed in claim 6, wherein when the illumination reflector has an inclined side edge connecting one end (L1) of a large diameter and an opposite end L2 of a small diameter and the inclined side edge is bent at an intermediate portion thereof so as to have a first edge (L3) connecting the end (L1) to the bent portion and a second edge (L4) connecting the opposite end (L2) to the bent portion, an angle (α

) between a plane formed by the end (L1) and the first edge (L3) is within a range of 65 to 75 degrees and an angle (β

) between a plane formed by the opposite end (L2) and the second edge (L4) is within a range of 122 to 132 degrees.

8. The light emitting diode floodlight as claimed in claim 1, wherein the illumination reflector has bosses regularly or irregularly formed on an inner peripheral surface.

9. The light emitting diode floodlight as claimed in claim 1, wherein the intermediate portion includes a hollow support pipe, a pair of heat radiating portions integrally formed at opposite sides of the support pipe and having a semicircular cross-section, and second heat sinks each being formed on an outer peripheral surface of the corresponding heat radiating portion.