Back to results
US 7,598,662 B2Granted
Low-pressure mercury vapor lamp with an adhering unit to improve luminous efficiency
AssigneePanasonic Corporation
InventorsMasahiro Miki, Hiroki Kitagawa
Life of this patent
Estimating the term…
Abstract
A compact self-ballasted fluorescent lamp includes a double-spiral arc tube and a holder. The holder has a tubular protrusion which is surrounded by the arc tube, at a center of its main surface. A closed end of the protrusion and a part of the arc tube facing the end of the protrusion are bonded together using a silicone adhesive. A part of a vertical printed circuit board that is used as a lighting circuit is housed within the protrusion.
Claims14
A low-pressure mercury vapor lamp comprising:
- an arc tube having electrodes at both ends and forming one curved discharge path inside;
- a holder having two openings in which the ends of the arc tube are respectively inserted, and a tubular protrusion that is surrounded by the arc tube;
- an adhesive bonding unit adhering the arc tube and the protrusion of the holder;
- a lighting circuit having an exothermic component that is positioned inside the protrusion, and
- a base, wherein
- the adhesive bonding unit adheres the protrusion to an upper portion of the arc tube, the upper portion protruding from the holder in a direction away from the base.
3 more elements
A low-pressure mercury vapor lamp comprising:
- an arc tube having electrodes at both ends and for forming one curved discharge path inside;
- a holder having two openings in which the ends of the arc tube are respectively inserted, and a tubular protrusion that is surrounded by the arc tube;
- an adhesive bonding unit adhering the arc tube to the protrusion of the holder;
- a lighting circuit having an exothermic component that is positioned inside the protrusion;
- and
- a base,
- wherein the arc tube is in a double-spiral shape,
- the protrusion has a closed end, and
- the adhesive bonding unit adheres the end of the protrusion to an upper part of the arc tube facing the end of the protrusion.
6 more elements
A low-pressure mercury vapor lamp comprising:
- an arc tube having electrodes at both ends and forming one curved discharge path inside;
- a holder having two openings in which the ends of the arc tube are respectively inserted, and a tubular protrusion that is surrounded by the arc tube;
- an adhesive bonding unit adhering the arc tube to the protrusion of the holder;
- a lighting circuit having an exothermic component that is positioned inside the protrusion;
- and
- a base,
- wherein the arc tube is in a U shape,
- the protrusion has a closed end, and
- the adhesive bonding unit adheres a side of the protrusion at least to an upper part of the arc tube facing the side of the protrusion.
6 more elements
Dependencies are inferred from the claim text.