LED light bulb

• US 20120274211A1
• Filed: 04/27/2011
• Published: 11/01/2012
• Est. Priority Date: 04/27/2011
• Status: Abandoned Application

• Current Assignee: De Xiang Xue
• Original Assignee: De Xiang Xue
• Inventors: Xue, De Xiang
• Application Number:
  US13/066,953
• Publication Number:
  US 20120274211A1
• Time in Patent Office: Days
• US Class Current: 315/35
• 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: F21K 9/238 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21V 19/0055 by screwing
• CPC Class Codes: F21V 23/006 the substrate being distinct from the light source holder
• CPC Class Codes: F21V 23/0435 activated by remote control means
• CPC Class Codes: F21V 23/0442 activated by means of a sensor, e.g. motion or photodetectors
• 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 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A LED light bulb includes a bulb casing, a control circuit, a light reflective heat sink, a supporting member and a plurality of LEDs. The supporting member is mounted in a receiving cavity of the bulb casing at a position having physical contact with the light reflective heat sink. The LEDs are spacedly provided on the supporting member to form a LED matrix thereon, wherein when the LEDs are activated to generate light, the light generated by the LEDs is arranged to be reflected by the supporting member and the light reflective heat sink to form high intensity illumination of the LED light bulb, while heat generated by the LEDs are effectively transferred and dissipated by the light reflective heat sink through the supporting member so as to prevent overheating in the receiving cavity.

Claims

1. A LED light bulb, comprising:

a bulb casing having a conductive head for electrically connected to a power source, and a light body which defines a receiving cavity and an illumination opening communicating said receiving cavity with an exterior of said bulb casing;

a control circuit mounted in said receiving cavity and electrically connected with said conductive head;

a light reflective heat sink mounted in said receiving cavity;

a supporting member mounted in said receiving cavity at a position having physical contact with said light reflective heat sink; and

a plurality of LEDs spacedly provided on said supporting member to form a LED matrix thereon, wherein when said LEDs are activated to generate light, said light generated by said LEDs is arranged to be reflected by said supporting member and said light reflective heat sink to form high intensity illumination of said LED light bulb, while heat generated by said LEDs are effectively transferred and dissipated by said light reflective heat sink through said supporting member so as to prevent overheating in said receiving cavity.

2. The LED light bulb, as recited in claim 1, wherein said light reflective heat sink is securely mounted in said receiving cavity and comprises a circular base member and a sidewall peripherally extended from said base member to define a reflection cavity between said base member and said sidewall, wherein said supporting member and said LEDs are securely and detachably mounted in said reflection cavity and in physical contact with said base member of said light reflective heat sink.

3. The LED light bulb, as recited in claim 2, wherein said heat reflection heat sink further has a light reflective surface facing said supporting member so that said light generated by said LEDs are arranged to be reflected in said reflection cavity so as to enhance a quality of said light delivered by said LED light bulb.

4. The LED light bulb, as recited in claim 2, further comprising a light cover detachably mounted on said illumination opening of said light body, wherein said light cover has a predetermined light transmissivity and a light passage cavity communicating with said receiving cavity for allowing said light generated by said LEDs to pass through said light cover and be reflected within said reflection cavity.

5. The LED light bulb, as recited in claim 3, further comprising a light cover detachably mounted on said illumination opening of said light body, wherein said light cover has a predetermined light transmissivity and a light passage cavity communicating with said receiving cavity for allowing said light generated by said LEDs to pass through said light cover and be reflected within said reflection cavity.

6. The LED light bulb, as recited in claim 4, wherein said control circuit is securely mounted in said receiving cavity and has an input electrically connected to said conductive head and an output electrically connected to said supporting member so as to provide actuation signal and power to operate said LEDs.

7. The LED light bulb, as recited in claim 5, wherein said control circuit is securely mounted in said receiving cavity and has an input electrically connected to said conductive head and an output electrically connected to said supporting member so as to provide actuation signal and power to operate said LEDs.

8. The LED light bulb, as recited in claim 5, further comprising a remote switch wirelessly connected to said control circuit in such a manner that a user is able to remotely control said operation of said LEDs by operating said remote switch, wherein said control circuitry has a control module for controlling said operation of said LEDs, and a remote control module for wirelessly communicating with said remote switch and to transmit said wireless signal to said control module so as to execute said corresponding wireless signal.

9. The LED light bulb, as recited in claim 6, further comprising a remote switch wirelessly connected to said control circuit in such a manner that a user is able to remotely control said operation of said LEDs by operating said remote switch, wherein said control circuitry has a control module for controlling said operation of said LEDs, and a remote control module for wirelessly communicating with said remote switch and to transmit said wireless signal to said control module so as to execute said corresponding wireless signal.

10. The LED light bulb, as recited in claim 7, further comprising a remote switch wirelessly connected to said control circuit in such a manner that a user is able to remotely control said operation of said LEDs by operating said remote switch, wherein said control circuitry has a control module for controlling said operation of said LEDs, and a remote control module for wirelessly communicating with said remote switch and to transmit said wireless signal to said control module so as to execute said corresponding wireless signal.

11. The LED light bulb, as recited in claim 7, wherein said supporting member is made of metallic material, wherein said LEDs are spacedly provided on said supporting member to form a plurality of rows and columns of said LEDs so as to form said LED matrix, wherein said supporting member is replaceably mounted on said light reflective heat sink so that when one or more of said LEDs are out of order, said supporting member and said LEDs are conveniently replaceable.

12. The LED light bulb, as recited in claim 10, wherein said supporting member is made of metallic material, wherein said LEDs are spacedly provided on said supporting member to form a plurality of rows and columns of said LEDs so as to form said LED matrix, wherein said supporting member is replaceably mounted on said light reflective heat sink so that when one or more of said LEDs are out of order, said supporting member and said LEDs are conveniently replaceable.

13. The LED light bulb, as recited in claim 10, wherein said light body is crafted and designed to have a truncated conical shape in which its diameter is gradually decreasing from said illumination opening toward said conductive head, wherein said conductive head is made of metallic material for electrically connecting to an external power source.

14. The LED light bulb, as recited in claim 12, wherein said light body is crafted and designed to have a truncated conical shape in which its diameter is gradually decreasing from said illumination opening toward said conductive head, wherein said conductive head is made of metallic material for electrically connecting to an external power source.

15. The LED light bulb, as recited in claim 10, wherein said bulb casing has a plurality of auxiliary slots spacedly formed thereon for facilitating enhanced heat dissipation of said bulb casing.

16. The LED light bulb, as recited in claim 12, wherein said bulb casing has a plurality of auxiliary slots spacedly formed thereon for facilitating enhanced heat dissipation of said bulb casing.

17. The LED light bulb, as recited in claim 14, wherein said bulb casing has a plurality of auxiliary slots spacedly formed thereon for facilitating enhanced heat dissipation of said bulb casing.

18. The LED light bulb, as recited in claim 12, wherein said light body of said bulb casing is made of high molecular plastic material which is durable, heat resistant and easy to manufacture.

19. The LED light bulb, as recited in claim 14, wherein said light body of said bulb casing is made of high molecular plastic material which is durable, heat resistant and easy to manufacture.

20. The LED light bulb, as recited in claim 17, wherein said light body of said bulb casing is made of high molecular plastic material which is durable, heat resistant and easy to manufacture.