Self-dusting lamp device

• US 8,115,395 B2
• Filed: 03/19/2009
• Issued: 02/14/2012
• Est. Priority Date: 09/15/2008
• Status: Expired due to Fees

• Current Assignee: Sunonwealth Electric Machine Industry Company Limited
• Original Assignee: Sunonwealth Electric Machine Industry Company Limited
• Inventors: Horng, Alex, Miyahara, Masaharu, Hu, Heng-Yu
• Primary Examiner(s): Le, Tung X
• Application Number:
  US12/407,306
• Publication Number:
  US 20100237782A1
• Time in Patent Office: 1,062 Days
• Field of Search: 362/264, 362/294, 362/373, 315/112, 315/117, 315/118, 315/291
• US Class Current: 315/117
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• 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 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01J 61/52 Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space heating or cooling arrangements to promote ionisation for starting H01J61/54

Abstract

A self-dusting lamp device includes a housing, a heat-dissipating module, a lighting element and a controlling unit. The housing has an air inlet portion and an air outlet portion on the outer periphery thereof. The heat-dissipating module has a heat-dissipating fan mounted in the housing. The lighting element is coupled to the heat-dissipating module for illumination. The controlling unit has a driving circuit electrically connected to the heat-dissipating fan and a direction controlling circuit electrically connected to the driving circuit. The direction controlling circuit controls the heat-dissipating fan to rotate in a normal direction for dissipating heat or to rotate in a dusting direction for dusting down the housing through the driving circuit.

Claims

1. A self-dusting lamp device comprising:

a housing having an electrical connection portion on an end of the housing and a light penetrating portion on the other end of the housing, with an air inlet portion and an air outlet portion on the outer periphery of the housing;

a heat-dissipating module being mounted in the housing and having a heat-dissipating fan;

a lighting element being coupled to the heat-dissipating module and being electrically connected to the electrical connection portion; and

a controlling unit having a driving circuit electrically connected to the heat-dissipating fan and a direction controlling circuit electrically connected to the driving circuit for regulating the rotation direction of the heat-dissipating fan via the driving circuit, the rotation direction changing from one of a cooling direction and a dusting direction to the other of the dusting direction and the cooling direction after a first predetermined amount of time and back after a second predetermined amount of time.

2. The self-dusting lamp device as claimed in claim 1, wherein the heat-dissipating fan is an axial-flow fan.

3. The self-dusting lamp device as claimed in claim 1, wherein the heat-dissipating module further has a sink coupled to the heat-dissipating fan, and the sink has a side coupled to the lighting element.

4. The self-dusting lamp device as claimed in claim 3, wherein the air inlet portion including a plurality of openings spaced in a circumferential direction of the housing.

5. The self-dusting lamp device as claimed in claim 3, wherein the air outlet portion includes a plurality of openings spaced in a circumferential direction of the housing.

6. The self-dusting lamp device as claimed in claim 1, wherein the air inlet portion includes a plurality of openings spaced in a circumferential direction of the housing.

7. The self-dusting lamp device as claimed in claim 1, wherein the air outlet portion includes a plurality of openings spaced in a circumferential direction of the housing.

8. The self-dusting lamp device as claimed in claim 1, wherein the driving circuit and the direction controlling circuit are packaged into an integrated circuit.