Optical semiconductor lighting apparatus

• US 8,894,247 B2
• Filed: 01/24/2013
• Issued: 11/25/2014
• Est. Priority Date: 08/06/2010
• Status: Expired due to Fees

• Current Assignee: Posco Led Company Ltd. (TMS Co., Ltd.)
• Original Assignee: Posco Led Company Ltd. (TMS Co., Ltd.)
• Inventors: Kim, Dong-Soo, Kang, Seok-Jin, Jeong, Min-A
• Primary Examiner(s): Lee, Diane
• Assistant Examiner(s): Sufleta, II, Gerald J
• Application Number:
  US13/749,316
• Publication Number:
  US 20130128589A1
• Time in Patent Office: 670 Days
• Field of Search: 362/373, 362/294.02, 362/311.02, 362/800, 362/547, 362/218, 362/264, 362/345, 361/695, 361/697, 361/703, 361/704, 361/707, 361/709
• US Class Current: 362/294
• CPC Class Codes: F21S 8/026 intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
• CPC Class Codes: F21V 23/0457 the sensor sensing the operating status of the lighting device, e.g. to detect failure of a light source or to provide feedback to the device
• CPC Class Codes: F21V 29/505 of reflectors
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• 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 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 29/78 with helically or spirally arranged fins or blades
• 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

An optical semiconductor lighting apparatus including a housing with a first end portion and a second end portion that is open, a light source module disposed in the housing, a fan disposed adjacent to the light source module in the housing, the fan rotating in a first direction to blow air toward the light source module, and a reflector disposed adjacent to the second end portion of the housing, the reflector enhancing an illumination scope. A moving path, in which at least a portion of the air drawn into the housing by the fan externally flows through the light source module, is formed in the housing.

Claims

1. An optical semiconductor lighting apparatus comprising:

a housing comprising a first end portion and an opposing second end portion, wherein the first and second end portions comprise an upper cover and a case body coupled to the upper cover, respectively;

a light source module disposed inside the housing;

a fan disposed inside the housing and adjacent to the light source module, wherein the fan rotates in a first direction to blow air toward the light source module; and

a reflector disposed adjacent to the second end portion of the housing, wherein;

the reflector comprises a first surface configured to reflect light emitted from the light source module and an opposing second surface that is exposed to ambient air; and

the reflector is coupled to the second end portion of the housing with an outer vent formed therebetween,

wherein the housing at least partially defines an inlet passage along which air is drawn between the first and second end portions of the housing by the fan, moved past the light source, and exhausted from the housing through the outer vent and elected over the second surface of the reflector, when the fan moves in the first direction;

wherein the light source module comprises;

a printed circuit board comprising a vent forming a portion of the moving path; and

at least one optical semiconductor element mounted on the printed circuit board;

wherein the vent comprises;

a middle vent formed through a center portion of the printed circuit board; and

a peripheral vent formed at an peripheral portion of the printed circuit board.

2. The optical semiconductor lighting apparatus of claim 1, further comprising a heat sink configured to dissipate heat generated by the light source module, wherein the heat sink comprises:

a base plate comprising a heat sink vent; and

a heat dissipation protrusion protruding from the base plate.

3. The optical semiconductor lighting apparatus of claim 1, wherein the peripheral vent is formed to be inclined toward an interior surface of the reflector.

4. The optical semiconductor lighting apparatus of claim 1, further comprising a dust collecting module configured to collect dust removed from the reflector.

5. The optical semiconductor lighting apparatus of claim 1, further comprising a lighting controller configured to control the fan and the light source module.

6. The optical semiconductor lighting apparatus of claim 5, wherein the lighting controller controls the light source module to inform of a malfunction of the fan when the fan does not rotate or rotates at a speed lower than a threshold.

7. The optical semiconductor lighting apparatus of claim 5, wherein the lighting controller controls the fan to rotate in a second direction opposite to the first direction for removing dust accumulated near an air inlet formed at the housing.

8. The optical semiconductor lighting apparatus of claim 1, wherein:

the case body comprises the fan and the light source module disposed therein and having a upper portion and a lower portion which are open; and

the upper cover is coupled with the case body to cover the upper portion of the case body.

9. The optical semiconductor lighting apparatus of claim 8, wherein the upper cover is separated from the upper portion of the case body to form a peripheral inlet through which outside air flows into the housing.

10. The optical semiconductor lighting apparatus of claim 8, wherein a plurality of stripe protrusions or a plurality of stripe grooves separated from one another is formed on an exterior surface of the case body.

11. The optical semiconductor lighting apparatus of claim 2, wherein the heat sink further comprises a middle protrusion wall forming the middle vent.

12. The optical semiconductor lighting apparatus of claim 2, wherein the heat sink further comprises a middle protrusion wall separating the middle vent and the peripheral vent.

13. The optical semiconductor lighting apparatus of claim 11, wherein the printed circuit board surrounds the middle protrusion wall.