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 ) includes 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 ) includes 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 solid-state light sources mechanically and electrically connected 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, and
wherein said two electrical contacts each comprise:
an elongated flange extending along said second side of said circuit board;
a substantially triangular segment depending from said flange at substantially a right angle and a terminal portion extending away from the apex of said triangular segment.
2. The solid-state light source of claim 1 wherein said terminal portion extends through said hollow base and is formed back upon itself to seat on an external surface of said base.
3. A solid-state light source compatible with an existing socket normally reserved for a known filamented lamp, comprising:
a base formed to mechanically and electrically adapt to a socket; and
a sub-assembly adapted to cooperate with and fit into said base, said sub-assembly comprising:
a plurality of solid-state light sources mechanically supported in the base;
two electrical contacts electrically connected to the solid-state light sources and extending to exterior electrical contacts as adapted to the socket;
a light pipe receiving input light from said plurality of light sources and extending away therefrom to a terminal end;
a light radiator affixed to said terminal end, the light radiator being shaped to radiate light that mimics the radiation of a filament; and
a light-opaque shroud substantially surrounding said light pipe between the light sources and the light radiator.