BULBTYPE LAMP WITH LIGHT EMITTING DIODES USING ALTERNATING CURRENT

• US 20110037386A1
• Filed: 10/29/2008
• Published: 02/17/2011
• Est. Priority Date: 11/27/2007
• Status: Active Grant

• Current Assignee: Gwangsung Lighting Industry Co., Ltd.
• Original Assignee: Gwangsung Lighting Industry Company
• Inventors: Lee, Choong Hae
• Granted Patent: US 8,545,050 B2
• Time in Patent Office: Days
• US Class Current: 315/35
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21K 9/61 using light guides
• 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 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]

Abstract

Provide is a bulbtype AC power LED lamp. The bulbtype AC power LED lamp includes an AC power LED board, a diffuser, a board base, an insulation base, a socket, and a bulb. The AC power LED board is in contact with the board base on which a heat sink is disposed to maximize heat emission efficiency during turn-on of the AC power LED. Also, light is diffused by the diffuser during turn-on of the AC power LED to prevent dazzling phenomenon as well as extend a lighting area.

Claims

1. A bulbtype AC power LED lamp in which an AC power LED board (20) on which at least one or more AC power LEDs (21) are mounted is attached to a top surface of the board base (30), a heat sink (33) is disposed along an entire outer surface of the board base (30), and a power connection unit electrically connected to the AC power LED board (20) is connected to a socket (50) supplying an AC power through the inside of the board base (30) and the inside of the insulation base (40) connected to a lower end of the board base (30), and the bulbtype AC power LED lamp having a bulb (60) covering the AC power LED board (20), the bulbtype AC power LED lamp being characterized in that the at least one or more AC power LEDs (21) are separately surrounded by diffusers (20a) to diffuse light, or all of the AC power LEDs (21) are surrounded by a diffuser (20b) to diffuse light.

2. The bulbtype AC power LED lamp of claim 1, wherein the diffusers (20a and 20b) are formed of a glass or a heat resistant polymer acrylic resin.

3. A bulbtype AC power LED lamp comprising:

an AC power LED board (20) on which an AC power LED (21) is mounted;

a diffuser (20a) fixed to the AC power LED board (20) to surround the AC power LED (21), the diffuser (20a) diffusing light of the AC power LED (21);

a board base (30) in which the AC power LED board (20) is insertedly attached to the inside of a board fixing groove (31), side surfaces and a bottom surface of the AC power LED board (20) are in contact with an inner surface of the board fixing groove (31), a bulb fixing groove (31′

) extends along a circumference of the board fixing groove (31), a first power connection hole (32) passes through the board base (30), and a heat sink (33) is disposed along an entire outer surface of the board base (30);

an insulation base (40) in which a second power connection hole (41) passing through the inside of the insulation base (40) and communicating with the first power connection hole (32) is defined, the insulation base (40) being connected to a lower end of the board base (30);

a socket (50) connected to a lower end of the insulation base (40), the socket (50) being inserted into the first power connection hole (32) and the second power connection hole (42) to supply an AC power to the AC power LED (21) through a power connection unit electrically connected to the AC power LED board (20); and

a bulb (60) inserted into the bulb fixing groove (31′

) to cover the AC power LED board (20).

4. The bulbtype AC power LED lamp of claim 3, wherein the AC power LED board (20) comprises a metal printed circuit board (PCB) formed of aluminum alloy, and a thermal conductive tape is attached to a bottom surface of the AC power LED board (20).

5. The bulbtype AC power LED lamp of claim 3, wherein at least one or more AC power LEDs (21) are mounted on the AC power LED board (20).

6. The bulbtype AC power LED lamp of claim 5, wherein the at least one or more AC power LEDs (21) are separately surrounded by diffusers (20a) to diffuse light, or all of the AC power LEDs (21) are surrounded by a diffuser (20b) to diffuse light.

7. The bulbtype AC power LED lamp of claim 4, wherein the thermal conductive tape (20) comprises a double-sided adhesive thermal conductive tape formed of any one of acrylic resin, silicon, and graphite.

8. The bulbtype AC power LED lamp of claim 6, wherein the diffusers (20a and 20b) are formed of a glass or a heat resistant polymer acrylic resin.

9. The bulbtype AC power LED lamp of claim 3, wherein the bulb (60) is formed of a glass or a heat resistant polymer acrylic resin.