Tubeless light-emitting diode based lighting device

• US 8,251,541 B2
• Filed: 03/25/2010
• Issued: 08/28/2012
• Est. Priority Date: 12/31/2009
• Status: Expired due to Fees

• Current Assignee: Unistar Opto Corporation
• Original Assignee: Unistar Opto Corporation
• Inventors: Lin, Chin-Lung
• Primary Examiner(s): Philogene, Haiss
• Application Number:
  US12/731,535
• Publication Number:
  US 20110156591A1
• Time in Patent Office: 887 Days
• Field of Search: 362/227, 362/249.01, 362/249.02, 362/249.05, 362/257, 362/294, 362/800, 315/291, 315/294, 315/295, 315/307, 315/313, 315/315
• US Class Current: 362/249.02
• CPC Class Codes: F21S 4/28 rigid, e.g. LED bars
• CPC Class Codes: F21V 15/01 Housings, e.g. material or assembling of housing parts F21V15/02 takes precedence housings forming signs or letters G09F13/04
• CPC Class Codes: F21V 15/013 the housing being an extrusion
• CPC Class Codes: F21V 15/015 Devices for covering joints between adjacent lighting devices; End coverings
• CPC Class Codes: F21V 21/025 Elongated bases having a U-shaped cross section
• CPC Class Codes: F21V 23/02 the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
• CPC Class Codes: F21V 23/026 Fastening of transformers or ballasts
• CPC Class Codes: F21V 31/005 Sealing arrangements therefor
• CPC Class Codes: F21V 31/04 Provision of filling media
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2107/20 on convex supports or substrates, e.g. on the outer surface of spheres
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A tubeless light-emitting diode (LED) based lighting device includes at least one base, at least one LED lighting module, and at least one control circuit. The base includes a heat dissipation body. The LED lighting module is mounted to the base so that the base provides the LED lighting module with the functions of retention and heat dissipation. The control circuit is mounted to the base and is electrically connected to power wiring of the LED lighting module for ON/OFF switching of the LED lighting module and supplying of operation power. As such, a tubeless lighting device that emits light in a power saving manner and is constructed in a volume reduced manner is provided.

Claims

1. A light-emitting diode (LED) based lighting device, comprises:

at least one base, which has a top forming at least one connection section;

at least one LED lighting module, which is mounted to the connection section of the base; and

at least one control circuit, which provides functions of selectively switching ON/OFF the LED lighting module and converting between an alternate current and a direct current, the control circuit being coupled to the base and in electrical connection with the LED lighting module and being adapted to connect to an external power source, whereby the LED lighting module is controlled by the control circuit for selectively switching ON/OFF and receives an operation power supplied from the control circuit for emission of light.

2. The LED based lighting device as claimed in claim 1, wherein the base comprises a heat dissipation body.

3. The LED based lighting device as claimed in claim 1, wherein the base has a hollow interior forming a receiving channel.

4. The LED based lighting device as claimed in claim 3, wherein the receiving channel receives at least one layer of a waterproof substance therein.

5. The LED based lighting device as claimed in claim 3, wherein the receiving channel has opposite ends to which end caps are respectively mounted.

6. The LED based lighting device as claimed in claim 5, wherein each of the end caps has a lower portion forming connection tabs that are fit into the receiving channel.

7. The LED based lighting device as claimed in claim 5, wherein the end caps define an opening.

8. The LED based lighting device as claimed in claim 7, wherein the opening is closed by a sealing plug.

9. The LED based lighting device as claimed in claim 2, wherein the base has a bottom which at least one mounting element is coupled.

10. The LED based lighting device as claimed in claim 2, wherein the base has a lower portion to which at least one suspension arm is coupled.

11. The LED based lighting device as claimed in claim 1, wherein the connection section of the base forms an inclined surface.

12. The LED based lighting device as claimed in claim 1, wherein the base has a triangular cross-section.

13. The LED based lighting device as claimed in claim 1, wherein the base has a chevron cross-section.

14. The LED based lighting device as claimed in claim 1, wherein the base comprises at least one shade attached to the top of the base.

15. The LED based lighting device as claimed in claim 14, wherein the shade has inside edges forming at least one fitting rim that is fit to the top of the base.

16. The LED based lighting device as claimed in claim 1, wherein the LED lighting module comprises at least one layer of a waterproof substance coated on a surface thereof.

17. The LED based lighting device as claimed in claim 1, wherein the LED lighting module comprises a single multi-dice packaged LED chip.

18. The LED based lighting device as claimed in claim 1, wherein the LED lighting module comprises:

at least one circuit board, which is mounted to the connection section of the base, the circuit board having a surface forming an LED power connection wiring arrangement; and

a plurality of individual single-dice LED'"'"'s, each of which is mounted to the circuit board to be connected with the LED power connection wiring arrangement for being powered to emit light.

19. The LED based lighting device as claimed in claim 1, wherein the control circuit comprises at least one power cable and a control cable, the power cable being adapted to connect to the external power source, the control cable being electrically connected to the LED lighting module.