Solid state lamp using light emitting strips

摘要

In one embodiment, an LED lamp has a generally bulb shape. The LEDs are low power types and are encapsulated in thin, narrow, flexible strips. The LEDs are connected in series in the strips to drop a desired voltage. The strips are affixed to the outer surface of a bulb form to provide structure to the lamp. The strips are connected in parallel to a power supply, which may be housed in the lamp. Since many low power LEDs are used and are spread out over a large surface area, there is no need for a large metal heat sink. Further, the light emission is similar to that of an incandescent bulb. In other embodiment, there is no bulb form and the strips are bendable to have a variety of shapes. In another embodiment, a light sheet is bent to provide 360 degrees of light emission. Many other embodiments are described.

主权项

1. A solid state lamp comprising:
a plurality of flexible strips, each of the flexible strips comprising a plurality of light emitting diodes (LEDs) and an end, the LEDs being connected to the end of the flexible strip; a base structure having a plurality of connection locations, each connection location being configured to receive the end of a corresponding flexible strip and to provide drive current to the plurality of LEDs of the corresponding flexible strip; and an electrical connector affixed to the base structure for connection to an external power source for providing the drive current to the flexible strips, wherein electrical connections from each LED extend to the end of the flexible strip, and wherein the flexible strips are independently deformed into corresponding deformable resilient shapes that produce an illumination profile based on the deformable resilient shapes of the independently deformed flexible strips, the flexible strips being further deformable into alternative deformable resilient shapes with the end received by the base structure.