Light bulb
AssigneeSignify Holding B.V.
InventorMichal Jan Horaczek
Life of this patent
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Abstract
A light bulb (10) comprising a feedthrough body (26) for accommodating electrical conductors (24) through a glass stem (23) of the light bulb (10) is disclosed. The light bulb (10) comprises a light engine (21) arranged within a sealed light transmissive surface structure (22), a feedthrough body (26) sealed in and extending through the glass stem (23) supporting the light engine (21), a plurality of conductive wires (24) mutually electrically isolated from each other and extending through and gastightly sealed in the feedthrough body (26), the conductive wires (24) connecting the light engine (21) to at least one power and signal source.
Claims16
A light bulb comprising:
- a light engine arranged within a space enclosed by a light transmissive surface structure and a glass stem;
- the glass stem comprising a mutually connected flare and tubular portion, the stem supporting the light engine and is fused by its flare to the light transmissive surface structure;
- a feedthrough body extending through the glass stem and being fixed by fusion in said tubular portion,
- wherein the feedthrough body is provided with a plurality of electrical conductors electrically isolated from each other which extend through the glass stem and connect said light engine to at least one power and signal source,
- wherein said feedthrough body is made of a ceramic, or a glass, and wherein the glass stem has a first melting point Tm1 and the feedthrough body has a second melting point Tm2, wherein Tm2-Tm1>=75° C.
A light bulb comprising:
- a light engine arranged within a space enclosed by a light transmissive surface structure and a glass stem;
- the glass stem comprising a mutually connected flare and tubular portion, the stem supporting the light engine and is fused by its flare to the light transmissive surface structure;
- a feedthrough body extending through the glass stem and being fixed by melting the feedthrough body in said tubular portion,
- wherein the feedthrough body is provided with a plurality of electrical conductors electrically isolated from each other which extend through the glass stem and connect said light engine to at least one power and signal source,
- wherein said feedthrough carrier body is made of a ceramic, or a glass, and wherein the glass stem has a first melting point Tm1 and the feedthrough carrier has a second melting point Tm2, wherein Tm2-Tm1>=75° C.
Dependencies are inferred from the claim text.