Lighting apparatus

• US 7,637,638 B2
• Filed: 11/25/2008
• Issued: 12/29/2009
• Est. Priority Date: 05/31/2007
• Status: Expired due to Fees

• Current Assignee: Leadray Energy Co., Ltd.
• Original Assignee: Kuei-Fang Chen
• Inventors: Chen, Kuei-Fang
• Primary Examiner(s): Sember; Thomas M
• Application Number:
  US12/277,726
• Publication Number:
  US 20090073681A1
• Time in Patent Office: 399 Days
• Field of Search: 362/218, 362/219, 362/223, 362/225, 362/217.02, 362/217.05, 362/235, 362/249.01, 362/249.02, 362/249.06, 362/249.14, 362/431, 362/294, 362/373
• US Class Current: 362/294
• CPC Class Codes: F21S 8/086 with lighting device attached sideways of the standard, e.g. for roads and highways
• CPC Class Codes: F21S 9/03 rechargeable by exposure to light
• CPC Class Codes: F21V 19/0055 by screwing
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/76 with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y02B 20/72 in street lighting

Abstract

A lighting apparatus includes a heat-dissipating unit, a circuit board unit, and a lighting unit. The heat-dissipating unit includes a base wall that extends in a longitudinal direction. The base wall has a top side and a bottom side formed with a convex surface portion. The circuit board unit is disposed on the base wall. The lighting unit includes an outer pair of light emitting sets and at least one other light emitting set disposed between the outer pair of the light emitting sets. The light emitting sets are disposed on the convex surface portion and are coupled electrically to the circuit board unit. Each of the light emitting sets has a plurality of light emitting units that are spaced apart from each other. A number of the light emitting units in each light emitting set in the outer pair is larger than a number of the light emitting units in each of the other light emitting sets.

Claims

1. A lighting apparatus comprising:

a heat-dissipating unit including a base wall that extends in a longitudinal direction, said base wall having a top side and a bottom side formed with a convex surface portion that is opposite to said top side;

a circuit board unit disposed on said base wall, and including a plurality of board strips, each of which is formed with a plurality of spaced-apart holes; and

a lighting unit including an outer pair of light emitting sets and at least one other light emitting set disposed between said outer pair of said light emitting sets, said light emitting sets of said lighting unit being disposed on said convex surface portion and being coupled electrically to said circuit board unit, each of said light emitting sets of said lighting unit having a plurality of light emitting units that are spaced apart from each other in the longitudinal direction, wherein a number of said light emitting units in each of said light emitting sets in said outer pair is larger than a number of said light emitting units in each of said at least one other light emitting set of said lighting unit, wherein each of said light emitting units extends though a respective one of said holes in said board strips and includes a metal heat-dissipating plate contacting said convex surface portion of said base wall of said heat-dissipating unit.

2. A lighting apparatus comprising:

a heat-dissipating unit including a base wall that extends in a longitudinal direction, said base wall having a top side and a bottom side that is opposite to said top side and that is formed with a pair of outer mounting parts and a pair of inner mounting parts disposed between said outer mounting parts, said outer and inner mounting parts extending in the longitudinal direction, said outer mounting parts being configured to form a first angle that is than substantially equal to 120 degrees therebetween, said inner mounting parts being configured to form a second angle that is substantially equal to 150 degrees therebetween, each of said inner and outer mounting parts being formed with a groove that extends in the longitudinal direction;

a circuit board unit disposed on said base wall, and including four board strips, each of which is formed with a plurality of fastener holes that are spaced apart from each other in the longitudinal direction;

a plurality of self-tapping screws, each of which extends though a respective one of said fastener holes and into a corresponding one of said grooves in said inner and outer mounting parts for securing said board strips to said base wall; and

a lighting unit including an outer pair of light emitting sets and a pair of inner light emitting sets disposed between said outer pair of said light emitting sets, said outer pair of said light emitting sets being respectively disposed on said board strips that are mounted to said outer mounting parts, said inner light emitting sets being respectively disposed on said board strips that are mounted to said inner mounting parts, each of said light emitting sets of said lighting unit having a plurality of light emitting units that are spaced apart from each other in the longitudinal direction, wherein a number of said light emitting units in each of said light emitting sets in said outer pair is larger than a number of said light emitting units in each of said inner light emitting sets of said lighting unit.

3. The lighting apparatus as claimed in claim 2, wherein said heat-dissipating unit further includes a plurality of heat-dissipating fins formed on said top side of said base wall.

4. The lighting apparatus as claimed in claim 2, wherein:

said base wall further has a pair of lateral ends that extend between said top and bottom sides thereof and that are opposite to each other in the longitudinal direction, and a though hole that extends from one of said lateral ends to the other of said lateral ends and that is defined by a hole-defining wall;

said hole-defining wall being formed with an indentation that extends in the longitudinal direction, and having a planar bottom part and a pair of upright parts that respectively extend from opposite sides of said planar bottom part and that cooperate with said planar bottom part to define said indentation;

said planar bottom part being formed with a screw hole therethrough;

said lighting apparatus further comprising a waterproof connector connected threadedly to said hole-defining wall at said screw hole.

5. The lighting apparatus as claimed in claim 4, further comprising a waterproofing ring clamped between said waterproof connector and said planar bottom part.

6. The lighting apparatus as claimed in claim 4, further comprising:

a light transmissible cover coupled to said base wall for covering said lighting unit; and

a pair of side covers coupled to said heat-dissipating unit and said light transmissible cover, opposite to each other in the longitudinal direction, and cooperating with said heat-dissipating unit and said light transmissible cover to form a compartment, said lighting unit being confined in said compartment.

7. The lighting apparatus as claimed in claim 6, wherein:

each of said lateral ends of said base wall is formed with a set of threaded holes that extend in the longitudinal direction, and a plurality of notches that extend from said top side of said base wall to said threaded holes;

said lighting apparatus further comprising a set of assembly screws, each of which extends though a corresponding one of said side covers and engages a respective one of said threaded holes for fastening said side covers to said heat-dissipating unit.