Protecting cover and LED lamp tube having the same

• US 7,611,260 B1
• Filed: 07/02/2008
• Issued: 11/03/2009
• Est. Priority Date: 07/02/2008
• Status: Active Grant

• Current Assignee: Kitagawa Holdings LLC (Intellectual Ventures LLC)
• Original Assignee: CPUMate Incorporated, Golden Sun News Techniques Company Limited
• Inventors: Lin, Chen-Hsiang, Hsu, Ken, Cheng, Chih-Hung, Lin, Kuo-Len
• Primary Examiner(s): Choi; Jacob Y
• Application Number:
  US12/166,586
• Time in Patent Office: 489 Days
• Field of Search: 362/311.14, 362/217, 362/218, 362/223, 362/224, 362/800, 362/294, 362/396, 313/634, 313/493, 313/238
• US Class Current: 362/224
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21K 9/27 Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
• CPC Class Codes: F21K 9/66 Details of globes or covers forming part of the light source
• CPC Class Codes: F21V 17/04 the fastening being onto or by the light source
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A light emitting diode (LED) lamp tube structure includes a tube, a circuit board, a plurality of LED lamps, two electric connectors and a protecting cover. The tube includes a plurality of heat dissipating holes. The circuit board is installed in the tube. The LED lamps are installed on the circuit board and electrically coupled to the circuit board. The two electric connectors are connected to both ends of the tube and electrically coupled to the circuit board. The protecting cover is installed onto the LED lamp tube and includes a board, and through holes disposed on the board and corresponding to the heat dissipating holes. Therefore, the LED lamp tube structure achieves a good heat dissipating effect and enhances the life of the LED lamp tube.

Claims

1. A light emitting diode (LED) lamp tube structure, comprising:

a tube, having a plurality of heat dissipating holes;

a circuit board, installed in the tube;

a plurality of LED lamps, installed on the circuit board, and electrically coupled to the circuit board;

two electric connectors, coupled to both ends of the tube, and electrically coupled to the circuit board; and

a protecting cover, partially enveloped onto the tube, and having an arc board, and a plurality of through holes being disposed on the board and installed aligning to the heat dissipating holes.

2. The LED lamp tube structure of claim 1, wherein the LED lamps are installed with an interval apart from each other and the heat dissipating holes are disposed with an interval apart from each other.

3. The LED lamp tube structure of claim 1, wherein the board is an elastic arc board.

4. The LED lamp tube structure of claim 1, wherein the board includes two clamping plate extended from both ends of the board respectively and elastically clamped onto the tube.

5. The LED lamp tube structure of claim 4, wherein each of the clamping plate includes a hook formed on an internal side of the clamping plate, and the tube includes a plurality of latch slots formed on a wall of the tube for latching the corresponding hooks respectively.

6. The LED lamp tube structure of claim 1, wherein the through hole has an internal diameter smaller than the internal diameter of the heat dissipating hole.

7. The LED lamp tube structure of claim 1, wherein the through hole has a conical cross section.