Led light bulb

• US 6,227,679 B1
• Filed: 09/16/1999
• Issued: 05/08/2001
• Est. Priority Date: 09/16/1999
• Status: Expired due to Fees

• Current Assignee: Mule Lighting Co., Shanghai Boashan Import & Export Trade Corporation, Ltd.
• Original Assignee: Mule Lighting Co., Shanghai Boashan Import & Export Trade Corporation, Ltd.
• Inventors: Xiang, Zhang Qi, Zhang, Zhou Kui
• Primary Examiner(s): LEE, Y MY QUACH
• Application Number:
  US09/397,399
• Time in Patent Office: 600 Days
• Field of Search: 362/235, 362/236, 362/238, 362/240, 362/244, 362/252, 362/800, 362/231, 362/249, 340/815.45, 340/815.73
• US Class Current: 362/236
• 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 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: F21W 2111/00 Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
• CPC Class Codes: F21Y 2107/00 Light sources with three-dimensionally disposed light-generating elements
• CPC Class Codes: F21Y 2107/50 on planar substrates or supports, but arranged in different planes or with differing orientation, e.g. on plate-shaped supports with steps on which light-generating elements are mounted
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 25/13 the devices being of a type provided for in group H01L33/00
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H05B 45/00 Circuit arrangements for operating light-emitting diodes [LED]
• CPC Class Codes: H05B 45/3574 Emulating the electrical or functional characteristics of incandescent lamps
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

An LED light bulb for use as an indicator or warning lamp comprises a support structure; a generally circular and planar disc attached to the support structure, wherein the disc is a printed circuit board and is perpendicularly oriented with respect to the structure. A plurality of interconnected LEDs are concentrically mounted on the disc wherein a portion of the LEDs are outwardly splayed at an angle away from a central axis point of the disc so that the LEDs collectively transmit light having about the same light intensity at viewing angles from about 0° to about 360° about the disc. The LED light bulb has circuitry means for providing a current to the LEDs.

Claims

1. An LED light bulb for use as an indicator lamp, task lamp, general lighting, decorative lamp, and traffic lamp, warning lamp, said LED light bulb comprising:

an opaque conical base portion wherein said base portion includes a first circular opening and a second circular opening, the first circular opening having a larger diameter than the second circular opening;

a generally circular and planar disc inserted into the first opening and affixed to the base portion, wherein said disc is a printed circuit board having a top planar surface and a bottom planar surface and is perpendicularly oriented with respect to base portion;

a plurality of interconnected LEDs concentrically mounted on the top surface of said disc wherein at least one of said LEDs is perpendicularly oriented with respect to the disc and a portion of said LEDs is outwardly splayed at an angle relative to said disc and away from a central axis point of said disc for transmission of light having about the same light intensity at different viewing angles;

a threaded socket attached to the second opening of the conical base portion; and

circuitry means located on the bottom surface of said disc and connected to the socket for providing a current to said LEDs.

2. The LED light bulb of claim 1 wherein said angle splayed outwardly away from the disk is from about 20 to about 80 degrees.

3. The LED light bulb of claim 1 wherein said angle splayed outwardly away from the disk is from about 50 to about 70 degrees.

4. The LED light bulb of claim 1 wherein said angle splayed outwardly away from the disk is about 55 to 60 degrees.

5. The LED light bulb of claim 1 further comprising a light transmissive cap attached to said, base portion.

6. The LED light bulb according to claim 5 wherein said light transmissive cap is colored.

7. The LED light bulb according to claim 1 wherein said LEDs are connected in parallel.

8. The LED light bulb according to claim 1 wherein said LEDs are connected in series.

9. The LED light bulb according to claim 1 wherein said circuitry means comprises a full wave rectifier for converting an AC current into a DC current.

10. The LED light bulb of claim 1 wherein said LEDs emit visible light at wavelengths corresponding to a selected one of a red, green, blue, yellow, amber and white color.