Solid state lamp using light emitting strips
First Claim
1. A solid state lamp comprising:
- a connector configured to electrically connect the solid state lamp to an external power source, the connector defining an axis; and
a bulb portion extending along the axis and attached to the connector, the bulb portion comprising;
an elongate substrate extending from a first end to a second end opposite the first end, the substrate supporting a plurality of spaced-apart light emitting diode (LED) unpackaged dies encapsulated on the substrate by an encapsulant comprising a phosphor and a binder,wherein the substrate is a curved substrate.
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Accused Products
Abstract
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.
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Citations
30 Claims
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1. A solid state lamp comprising:
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a connector configured to electrically connect the solid state lamp to an external power source, the connector defining an axis; and a bulb portion extending along the axis and attached to the connector, the bulb portion comprising; an elongate substrate extending from a first end to a second end opposite the first end, the substrate supporting a plurality of spaced-apart light emitting diode (LED) unpackaged dies encapsulated on the substrate by an encapsulant comprising a phosphor and a binder, wherein the substrate is a curved substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification