Bulb-type LED lamp

• US 8,058,782 B2
• Filed: 03/10/2010
• Issued: 11/15/2011
• Est. Priority Date: 03/10/2010
• Status: Expired due to Fees

• Current Assignee: Chicony Power Technology Co. Ltd. (Chicony Electronics Company Limited)
• Original Assignee: Chicony Power Technology Co. Ltd. (Chicony Electronics Company Limited)
• Inventors: Lai, Chyi-Lang
• Primary Examiner(s): Patel; Ashok
• Application Number:
  US12/720,776
• Publication Number:
  US 20110221322A1
• Time in Patent Office: 615 Days
• Field of Search: None
• US Class Current: 313/46
• 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 23/002 Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A bulb-type LED lamp includes a cooling structure, an LED module, a transparent shade and a lamp head. The cooling structure includes a thermally conductive plate and a plurality of cooling fins configured by being bended upwardly from a periphery of the thermally conductive plate, and each cooling fins are disposed by being interspaced to each other. The LED module is attached onto a bottom face of the thermally conductive plate. The transparent shade covers the LED module correspondingly and is connected fixedly to the thermally conductive plate. The lamp head is fitted and connected to each cooling fin and electrically connected to the LED module. Thereby, the thermal convection is enhanced and the cooling efficiency is further promoted.

Claims

1. A bulb-type LED lamp, including:

a cooling structure, which includes a thermally conductive plate and a plurality of cooling fins configured by being bended upwardly from a periphery of the thermally conductive plate, each cooling fins being disposed by interspacing to each other;

an LED module, which is attached onto a bottom face of the thermally conductive plate; and

a lamp head, which is fitted and connected to each cooling fin and electrically connected to the LED module.

2. The bulb-type LED lamp according to claim 1, wherein an extending direction of the cooling fin is opposite to a light projecting direction of the LED module.

3. The bulb-type LED lamp according to claim 1, wherein the thermally conductive plate and the cooling fins are formed integrally.

4. The bulb-type LED lamp according to claim 1, wherein the lamp head includes a converging piece in which a ring groove is arranged, and the ring groove is adapted for the cooling fins being separately inserted therein.

5. The bulb-type LED lamp according to claim 1, wherein the LED module includes a circuit substrate attached onto another side of the thermally conductive plate, a plurality of LEDs disposed on the circuit substrate and electrically connected thereto, and a first wire and a second wire respectively electrically connected to the circuit substrate, and the thermally conductive plate is arranged a perforation adapted for the first wire and the second wire to pass through, and the lamp head includes a converging piece adapted for fitting and converging the cooling fins, and the converging piece is arranged a through hole adapted for the first wire and the second wire to pass through.

6. The bulb-type LED lamp according to claim 5, further including a hollow tube, wherein two ends of which are respectively inset into the perforation and the through hole, and which has a hole adapted for the first wire and the second wire to pass through, and on an outside of which a plurality of ditch grooves are arranged.

7. The bulb-type LED lamp according to claim 1, wherein the LED module includes a circuit substrate attached onto another side of the thermally conductive plate, a plurality of LEDs disposed on the circuit substrate and electrically connected thereto, and a first wire and a second wire respectively electrically connected to the circuit substrate, and the lamp head includes a converging piece adapted for fitting and converging the cooling fins and a electrically connecting body connected fixedly to the converging piece and electrically connected to the circuit substrate.

8. The bulb-type LED lamp according to claim 7, wherein the electrically connecting body has an end part adapted for the first wire electrically connected thereto, a threaded part connected fixedly to the converging piece and adapted for the second wire electrically connected thereto and an insulation part formed between the end part and the threaded part.

9. The bulb-type LED lamp according to claim 1, further including a transparent shade covering the LED module correspondingly and connected fixedly to the thermally conductive plate.