LED room light

• US 8,952,613 B2
• Filed: 05/12/2010
• Issued: 02/10/2015
• Est. Priority Date: 05/12/2009
• Status: Expired due to Fees

• Current Assignee: David F. Shaw, Leroy E. Anderson
• Original Assignee: David F. Shaw
• Inventors: Anderson, Leroy E., Shaw, David F.
• Primary Examiner(s): Owens, Douglas W
• Assistant Examiner(s): YANG, AMY X
• Application Number:
  US12/778,839
• Publication Number:
  US 20100289407A1
• Time in Patent Office: 1,735 Days
• Field of Search: 315/35, 315/112, 315/50, 315/158, 362/231, 362/294
• 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: F21V 29/506 of globes, bowls or cover glasses
• 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 3/02 characterised by the shape
• CPC Class Codes: F21Y 2107/40 on the sides of polyhedrons, e.g. cubes or pyramids
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

Disclosed is a light bulb which utilizes LEDs which replaces an incandescent light bulb in a fixture for incandescent light bulbs. The LED light bulb includes a multi-faceted head on which multiple LEDs are placed, with the multi-faceted head being in contact with heat dissipation structures. The heat dissipation structures include a heat transfer column which extends from the LEDs to the base of the bulb. A removable cover is enclosed which has openings for air circulation within the globe of the light bulb.

Claims

1. An LED light bulb for use with a socket for incandescent bulbs, comprising:

a bulb base, comprising a conductive socket with a first electrode at an apex of said socket, and a second electrode in electrical connection with a sidewall of said bulb base, with said electrodes configured to physically and electrically engage a standard light bulb socket configured for incandescent bulbs;

a generally cylindrical radiator section attached adjacent to said bulb base, said radiator section with at least one generally circular radiator fin circumvolving said bulb base, said radiator section for expelling heat from said bulb;

a generally planar globe base attached to said radiator section, said globe base configured for removable attachment of a globe, and said globe base defining a plurality of openings for ventilation adjacent a globe base edge, with said globe comprising generally cylindrical sidewalls and a spherical top, enclosing an air space around LEDs, with an opening near said globe top and a plurality of openings in glove sidewalls, for air circulation by passive convection through said air space above said LED and inside said globe, with said holes providing air convection paths based on the principle of by warm air rising, when said light bulb is in any spacial orientation, said globe serving to protect said LED from contact with foreign objects and being removable from said globe base;

a control circuit including electronics components for powering and regulating electricity to an LED light;

at least one LED positioned inside said globe on said globe base, with said LED electrically connected to said first and second electrode by electrical connections, and configured to emit light when energized, with said LED in thermal contact with said bulb base, said globe base, and said radiator section.

2. The LED based light bulb of claim 1 in which said radiator section further comprises a plurality of circumvolving radiator fins for expelling heat produced by said at least one LED.

3. The LED light bulb of claim 1 in which said radiator section is comprised of two of more adjacent circumvolving radiator rings with radiator fins.

4. An LED light bulb for use with a socket for incandescent bulbs, comprising:

a bulb base, comprising a conductive socket with a first electrode at an apex of said socket, and a second electrode in electrical connection with a sidewall of said bulb base, with said electrodes configured to physically and electrically engage a standard light bulb socket configured for incandescent bulbs;

a generally cylindrical radiator section attached adjacent to said bulb base, said radiator section with at least one generally circular circumvolving radiator fin, said radiator section for expelling heat from said bulb;

a generally planar globe base attached to said radiator section, said globe base configured for removable attachment of a globe, said globe serving to protect said LED from contact with foreign objects and being removable from said globe base, said globe comprising generally cylindrical sidewalls and a domed top, and enclosing an air space around one or more LEDs, and defining a plurality of vent openings in said globe base, at least one opening in a top of said globe, and a plurality of vent openings in said globe sidewalls, allowing passage of air through said globe base, and through vent openings in said globe top and said globe sidewalls, for heat transfer by air circulation, so that said bulb allows convective air cooling of said LEDs by movement of air in said air space inside said globe, with said bulb configured for passive convective cross current air flow through said air space in said globe no matter the orientation of said bulb, with said vent openings providing circulating paths when the bulb is in any particular special orientation;

a control circuit including electronics components for powering and regulating electricity to an LED light;

at least one LED positioned inside said globe on said globe base, with said LED electrically connected to said first and second electrode by electrical connections, and configured to emit light when energized, with said LED in thermal contact with said bulb base, said globe base, and said radiator section;

a heat conducting column extending from said bulb base, through said radiator section and said globe base, and extending above said globe base, said column terminating in a multi faceted head, with each facet configured for mounting one or more LEDs, with each facet at a different angle from other facets and made of a heat conducting material, and with LEDs on said facets directed in a different direction from other LEDs, for providing light in different directions for different zones of a room, said column comprised of heat conductive/ electricity non-conductive material, with said column having a base end and an LED end, said column in thermal contact with said LED light and encasing said control circuit, and with said LED mounted on said LED end of column in close proximity to a heat transfer structure with thermal contact with said bulb base, and further comprising one or more conductive rods, each rod with an LED end and a base end, and extending from a point adjacent to an LED through and encased in said column, for improved heat movement from said LED through said column.

5. The LED light bulb of claim 4 which further comprises 4 or more vent holes in sidewalls of said globe, and 4 or more vent holes in said globe base, providing multiple air convection routes for improved air circulation and turnover of air inside said globe, with said convection routes configured to providing ventilation with the bulb in any spacial orientation.