LED LIGHT BULBS IN PYRAMIDAL STRUCTURE FOR EFFICIENT HEAT DISSIPATION

• US 20100264806A1
• Filed: 08/18/2009
• Published: 10/21/2010
• Est. Priority Date: 04/20/2009
• Status: Active Grant

• Current Assignee: Santa's Best
• Original Assignee: 1 Energy Solutions Incorporated
• Inventors: Yu, Beijing
• Granted Patent: US 8,297,787 B2
• Time in Patent Office: Days
• US Class Current: 313/317
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• 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 9/238 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21V 23/005 the substrate is supporting also the light source
• CPC Class Codes: F21V 23/006 the substrate being distinct from the light source holder
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21Y 2107/60 on stacked substrates
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05K 1/144 Stacked arrangements of planar printed circuit boards
• CPC Class Codes: H05K 2201/042 Stacked spaced PCBs; Planar parts of folded flexible circuits having mounted components in between or spaced from each other
• CPC Class Codes: H05K 2201/09027 Non-rectangular flat PCB, e.g. circular
• CPC Class Codes: H05K 2201/10106 Light emitting diode [LED]

Abstract

Disclosed is an LED light bulb having safe and efficient heat dissipation, while also providing maximum light distribution by providing multiple printed circuit boards arranged in a pyramidal structure, having multiple LEDs. The multiple printed circuit boards are connected by conductor wires contained within a transparent housing, so that the multiple printed circuit boards sit on a base of the LED light bulb. A bottom printed circuit board may also be employed if additional circuitry is desired.

Claims

1. A method for housing multiple LEDs in a LED light bulb comprising:

providing a transparent housing and a base;

providing a plurality of printed circuit boards having LEDs disposed substantially around peripheral edges of said plurality of printed circuit boards;

constructing a pyramidal structure of said plurality of printed circuit boards by stacking said plurality of printed circuit boards in layers, so that said plurality of printed circuit boards form a pyramidal structure such that said peripheral edges of adjacent printed circuit boards of said plurality of printed circuit boards do not extend substantially beyond the LEDs that are disposed around said peripheral edges of the plurality of printed circuit boards and do not substantially block light and heat emitted from the LEDs;

connecting said multiple printed circuit boards having said multiple LEDs with conductor wires.

2. The method of claim 1 further comprising;

disposing a bottom printed circuit board on said base that provides additional circuitry.

3. An LED light bulb comprising:

at least two printed circuit boards arranged in a pyramidal structure so that an upper printed circuit board with at least one LED has a smaller surface area than a lower printed circuit board, said smaller printed circuit board having a peripheral edge that does not substantially block light and heat emitted from LEDs connected to said lower printed circuit board;

a transparent housing that encloses said at least two printed circuit boards that are arranged in said pyramidal structure.

4. The LED light bulb of claim 3 further comprising:

a bottom printed circuit board that provides circuitry to operate said LED light bulbs.

6. The LED bulb of claim 3 further comprising:

at least one additional printed circuit board that is connected to said second printed circuit board so that said at least one additional printed circuit board is aligned with said second printed circuit board in a pyramidal structure so that said additional printed circuit board does not block light and heat emitted from said second set of LEDs;

a third layer of LEDs disposed on said additional printed circuit board.

5. An LED light bulb comprising:

a first printed circuit board;

a layer of LEDs disposed on the periphery of said first printed circuit board;

a second printed circuit board connected to said first printed circuit board so that said second printed circuit board is aligned with said first printed circuit board in a pyramidal structure so that said second printed circuit board does not block light emitted from said first set of LEDs;

a second layer of LEDs disposed on the periphery of said second printed circuit board;

a transparent housing that encloses said first and second printed circuit boards.