Light Emitting Diode Light Bulbs with Strands of LEDs

• US 20110069487A1
• Filed: 09/21/2010
• Published: 03/24/2011
• Est. Priority Date: 04/23/2007
• Status: Abandoned Application

• Current Assignee: Kai Kong Ng, Kuo-Chiu Chiang
• Original Assignee: Kai Kong Ng, Kuo-Chiu Chiang
• Inventors: NG, Kai Kong, CHIANG, Kuo-Chiu
• Application Number:
  US12/887,307
• Publication Number:
  US 20110069487A1
• Time in Patent Office: Days
• US Class Current: 362/249.02
• CPC Class Codes: F21K 9/23 Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• CPC Class Codes: F21V 19/0005 of sources having contact pins, wires or blades, e.g. pinch sealed lamp F21V19/001 takes precedence
• 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: F21V 3/02 characterised by the shape
• CPC Class Codes: F21W 2121/00 Use or application of lighting devices or systems for decorative purposes, not provided for in codes F21W2102/00 – F21W2107/00
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2105/00 Planar light sources
• CPC Class Codes: F21Y 2107/00 Light sources with three-dimensionally disposed light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/00 Circuit arrangements for operating light-emitting diodes [LED]
• CPC Class Codes: H05B 45/37 Converter circuits
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

The present invention relates to an LED light bulb. The LED light bulb comprises a base and a hollow shell. The base has a closed end, an open end and a sleeve between the two ends. The shell is connected to the open end of the base. The LED light bulb comprises at least two LEDs substantially linearly arranged within the shell. By arrangement of multiple LEDs one or more strands the luminance or brightness of the bulb is improved compared with a bulb with one LED or with several horizontally arranged LEDs in a common place, without sacrificing the advantage of energy saving.

Claims

1. A bulb, comprising:

a base, the base including a closed end, an open end and a sleeve therebetween, wherein the sleeve serves as an electrode and the closed end has a contact point serving as another electrode;

a hollow shell connected to the open end of the base; and

a strand of at least two LEDs, each LED including a base having electrical terminals and an envelope extending from the base to an envelope top end distal from the base, the LEDs joined together and arranged within the shell such that for all LEDs, but for the last LED, in each strand, the envelope top end of any given LED in the strand substantially faces the base of an adjacent LED in the strand,

wherein the bulb is adapted for connection to a power source.

5. The bulb according to claim 1, wherein the base of the bulb is hollow, and, within the hollow base, the bulb further comprises a power converter for converting AC power to DC power to be supplied to the LEDs.

6. The bulb of claim 5, wherein

both the two electrodes are connected to the input of the power converter;

and

the bulb further comprises an insulating part separating and insulating the two electrodes.

7. The bulb according to claim 6, wherein the power converter includes a filter circuit, a bridge rectifier circuit, and a resistor;

the bridge rectifier circuit is connected to the electrodes via the filter circuit, and the output of the bridge rectifier circuit is connected to LEDs via the resistor.

8. The bulb according to claim 7, wherein the sleeve of the base has external threading.

9. The bulb according to claim 1, wherein the shell is made of translucent or transparent plastic.

10. The bulb according to claim 1, wherein the shell is made of translucent or transparent glass.

11. The bulb according to claim 1, wherein the LEDs are connected in parallel.

12. The bulb according to claim 1, wherein the LEDs are connected in series.

2-4. -4. (canceled)

13. An LED bulb, the bulb comprising:

a base, the base including a closed end, an open end and a sleeve therebetween, wherein the sleeve serves as an electrode and the closed end has a contact point serving as another electrode;

a hollow shell connected to the open end of the base; and

at least two strands of LEDs wherein each strand of LEDs includes at least two LEDs, each LED having a base comprising electrical terminals and an envelope extending from the base to an envelope top end distal from the base, the LEDs joined together and arranged within the shell such that for all LEDs, but for the last LED, in each strand, the envelope top end of any given LED in the strand substantially faces the base of an adjacent LED in the strand,

wherein the bulb is adapted for connection to a power source.

17. The bulb according to claim 13 wherein the LEDs are connected in parallel within each strand.

18. The bulb according to claim 13 wherein the LEDs are connected in series within each strand.

14-16. -16. (canceled)