Vapor lamp assembly technique
View Patent ↗An LED lamp that couples a heatsink with LEDs mounted on it to a glass envelope with a surface area equivalent to approximately that of a conventional light bulb, and by using a coolant vapor within the glass envelop, the lamp can be made much lighter and more cheaply. The heat generated by the LEDs is dissipated by the glass surface and not conducted into the heatsink. The heatsink can thus be mostly for the power supply. This allows for a reduced operating temperature for the power supply components that allows for a longer expected life for the power supply. In addition, the LED light bulb of the present invention can have nearly the same shape and appearance as a standard incandescent bulb. The invention can also have an advanced flyback power supply.
1. A method for assembling an Light Emitting Diode (LED) light bulb comprising: mounting LEDs onto a thermally conductive structure; mechanically incorporating the thermally conductive structure with a glass base; electrically connecting the LEDs with conductors incorporated within the glass base; fusing a glass envelope to the glass base via a heat source; injecting a coolant into the glass envelope via a tube; reducing the pressure within the glass envelope; and sealing off the tube.
2. The method of claim 1 further comprising adding a power supply capable of converting alternating current to direct current.
3. The method of claim 1 further comprising constructing said thermally conductive structure by: mounting LEDs onto a printed circuit panel; soldering or bonding to make electrical contact between the LEDs and the printed circuit; bending the printed circuit panel such that the LEDs are located on an outer surface.
4. The method of claim 3 further comprising providing at least one relief groove on the printed circuit panel to facilitate bending.
5. The method of claim 4 further comprising adding at least one jumper wire between segments of the printed circuit panel to hold the segments together after bending.
6. The method of claim 4 wherein said groove is on the backside of the circuit panel.
7. The method of claim 6 further comprising providing said LED light bulb with an Edison base.
8. The method of claim 7 wherein said power supply is a non-isolated flyback converter having a DC output voltage magnitude that is less than the maximum peak input voltage.
9. The method of claim 8 wherein said flyback converter is pseudo-discontinuous using a capacitor to sense the end of a discharge phase of an inductor.