| 20110254421 | Cooling Structure For Bulb Shaped Solid State Lamp - In one embodiment, an LED lamp has a generally bulb shape, such as a standard A19 shape. The section of the lamp between the LEDs' metal support platform and the screw-in base is a metal heat sink having the A19 form factor. The heat sink has metal fins that are asymmetrically arranged with respect to a center axis of the lamp such that, when the lamp's center axis is oriented vertically and the lamp is generating heat, the fins create an asymmetric air flow that moves through (across) a plane that is parallel to the center axis, wherein the air flow pattern is peripherally monoperiodic around the periphery of the lamp. Due to the asymmetric air flow pattern, the maximum air flow velocity is increased and asymmetric heat patterns result around the center axis, resulting in greater cooling of the heat sink. | 10-20-2011 |
