Light module and module type lighting device

• US 8,764,244 B2
• Filed: 03/04/2011
• Issued: 07/01/2014
• Est. Priority Date: 06/23/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Jeon, Yongseog, Kim, Yongjin, Lee, Jeongsoo, Cho, Youngjae, Cho, Moonsung
• Primary Examiner(s): Lee, Jong-Suk (James)
• Assistant Examiner(s): TUMEBO, TSION M
• Application Number:
  US13/040,608
• Publication Number:
  US 20110317425A1
• Time in Patent Office: 1,215 Days
• Field of Search: 362/249.02, 362/249.05, 362/294, 362/295, 362/264, 362/218, 362/373, 439/487
• US Class Current: 362/294
• CPC Class Codes: F21K 9/20 Light sources comprising attachment means
• CPC Class Codes: F21S 2/005 of modular construction
• CPC Class Codes: F21V 23/00 Arrangement of electric circuit elements in or on lighting devices characterised by cooling arrangements F21V29/508
• CPC Class Codes: F21V 23/007 enclosed in a casing
• CPC Class Codes: F21V 23/008 the casing being outside the housing of the lighting device
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/763 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: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A light module may include a base having a first side and a second side, and a light source on the first side of the base and having a light emitting diode (LED) to emit light in a direction away from the base. A plurality of cooling fins may be provided on the second side of the base, the plurality of cooling fins including a first set of fins having a first height and a second set of fins having a second height, wherein the first height is less than the second height. A driving circuit may be provided on the first set of cooling fins having the first height, wherein the first set of cooling fins are provided between the driving circuit and the second side of the base.

Claims

1. A module type lighting device comprising:

a power supply that includes a case and a circuit board within the case;

a frame; and

a plurality of light modules provided on the frame, each light module being individually detachable from the frame, each light module including;

a base having a first side and a second side,

a plurality of through-holes provided on the base to extend in a vertical direction from the first side of the base to the second side of the base,

a wall extended from the first side of the base,

a light source on the first side of the base and having a light emitting diode (LED) to emit light in a direction away from the base, the light source disposed inside the wall,

a sealer provided in the wall,

a window coupled to the base with a contact with the sealer and to cover the light source,

a cover to cover a circumferential surface of the window,

a heat sink having a plurality of cooling fins on the second side of the base,

a driving circuit to electrically connect the power supply to each light module, the driving circuit being detachably coupled to the light module or the power supply; and

a channel that passes through the base,

wherein the light source is electrically connected to the driving circuit through the channel,

wherein the driving circuit is a constant-current circuit,

wherein the circuit board of the power supply includes an AC-DC converter,

wherein the plurality of through-holes are arranged on the base at areas that correspond to spaces between the cooling fins,

wherein air flows through spaces via the plurality of through-holes,

wherein the plurality of cooling fins includes a first set of cooling fins and a second set of cooling fins, the first set of cooling fins having a lower height than the second set of cooling fins,

wherein the driving circuit is provided on the first set of cooling fins, and

wherein the driving circuit is provided over the first set of cooling fins without being provided over the second set of cooling fins.

2. The module type lighting device of claim 1, wherein the light source includes a circuit board, and the driving circuit is separate from the circuit board of the light source.

3. The module type lighting device of claim 1, wherein the driving circuit further includes a dimming circuit, or a circuit for turning on and off the light source with a timed pattern.

4. A module type lighting device comprising:

a power supply that includes a case and a circuit board;

a frame; and

a plurality of light modules on the frame, each light module being individually detachable from the frame, wherein at least one light module includes;

a base having a first side and a second side,

a plurality of through-holes at the base that extend from the first side of the base to the second side of the base,

a wall extended from the first side of the base,

a light source at the first side of the base and having a light emitting diode (LED) to emit light away from the base, the light source being inside the wall,

a sealer at the wall,

a window coupled to the base to cover the light source,

a cover to cover a surface of the window,

a first set of cooling fins and a second set of cooling fins on the second side of the base, the first set of cooling fins having a lower height than the second set of cooling fins,

a driving circuit to electrically connect the power supply to each of the plurality of light modules, the driving circuit being detachably coupled to at least one of the light modules or the power supply, wherein the driving circuit is provided over the first set of cooling fins without being provided over the second set of cooling fins, and

a channel that passes through the base,

wherein the light source is electrically connected to the driving circuit through the channel,

wherein the plurality of through-holes are at the base at areas corresponding to spaces between the cooling fins,

wherein air flows through the spaces via the plurality of through-holes.

5. The module type lighting device of claim 4, wherein the driving circuit is a constant-current circuit, and

wherein the circuit board of the power supply includes an AC-DC converter.

6. The module type lighting device of claim 4, wherein the light source includes a circuit board, and the driving circuit is separate from the circuit board of the light source.

7. The module type lighting device of claim 4, wherein the driving circuit includes a dimming circuit.

8. The module type lighting device of claim 4, wherein the driving circuit includes a circuit for turning on and off the light source with a timed pattern.