LED light source mimicking a filamented lamp
View Patent ↗A solid-state light source ( 10 ) that is compatible with the existing sockets normally reserved for filamented lamps ( 100 ). The solid-state light source ( 10 ) comprises a hollow base ( 12 ) formed to mechanically and electrically adapt to an existing socket normally reserved for lamps ( 100 ). A sub-assembly ( 14 ) is adapted to cooperate with and fit into the hollow base ( 12 ). The sub-assembly ( 14 ) comprises a circuit board ( 16 ) with a plurality of solid-state light sources ( 18 ) mechanically and electrically connected to one side ( 20 ) of the circuit board. Two electrical contacts ( 22, 24 ) are positioned on the other side ( 26 ) of the circuit board for connection to an electrical circuit. A light pipe ( 28 ) covers the plurality of light sources ( 18 ) and extends away therefrom to a terminal end ( 30 ). A light radiator ( 34 ) is affixed to the terminal end ( 30 ) and a light-opaque shroud ( 33 ) surrounds the light pipe ( 32 ) to keep all of the light generated by the solid-state light source within the light pipe ( 32 ) to exit out of the light radiator ( 34 ).
1. A solid-state light source compatible with existing sockets normally reserved for filamented lamps comprising:
a hollow base formed to mechanically and electrically adapt to a socket; and
a sub-assembly adapted to cooperate with and fit into said hollow base, said sub-assembly comprising:
a circuit board;
a plurality of LED chip light sources mechanically and electrically connected directly chip on board to a first side of said circuit board;
two electrical contacts positioned on a second side of said circuit board for connection to an electrical circuit;
a light pipe covering said plurality of light sources and extending away therefrom to a terminal end;
a light radiator affixed to said terminal end; and
a light-opaque shroud surrounding said light pipe.
2. The solid-state light source of claim 1 wherein said light pipe comprises an optically clear material.
3. The solid-state light source of claim 1 wherein said light radiator comprises an optically clear material.
4. The solid-state light source of claim 3 wherein said optically clear material is selected from the group consisting of glass, polycarbonate, or any suitable plastic.
5. The solid-state light source of claim 4 wherein said light radiator mimics the emission characteristics of an incandescent coil.
6. The solid-state light source of claim 1 wherein the outer surface of said shroud is roughened.