Dielectric barrier discharge lamp
AssigneePatent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH
InventorsWerner Berlinghof, Rolf Bauerle, Gerhard Doll
Life of this patent
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Abstract
Dielectric barrier discharge lamp The discharge tube (1) of a dielectric barrier discharge lamp is closed off in a gas-tight manner with the aid of a disk-like closure element (7) but without the use of joining means. For this purpose, the discharge tube (1) has a constriction (10), which surrounds the edge of the disk-like closure element (7) in the form of a ring.
Claims11
A dielectric barrier discharge lamp (13) having a closed tubular discharge vessel (1, 4, 7) and having elongate electrodes (5a;
- 5b), the discharge vessel (1, 4, 7) comprising a discharge tube (1) which is closed at both its ends, wherein at least one end of the discharge tube (1) is closed off in a gas-tight manner with the aid of a disk-like closure element (7) but without the use of joining means, as a result of the or each closure element (7) being arranged at the respective end (2) within the discharge tube (1) and being joined in a gas-tight manner, over its entire circumference, directly to the inner wall of the discharge tube (1), the discharge tube (1) being constricted over its entire circumference in the region of the join, in such a manner that the constriction (10) surrounds the edge of the disk-like closure element (7) in the form of a ring.
The discharge lamp as claimed in one of the preceding claims, in which at least one electrode (5a;
- 5b) is arranged on the inner wall of the discharge tube (1) and, in the region of the constriction (10), leads outward, in a gas-tight manner, through the join between inner wall and closure element (7).
The discharge lamp as claimed in one of the preceding claims, in which the disk-like closure element (7) has an opening (8), on which a pump tube (9) is integrally formed.
The discharge lamp as claimed in one of the preceding claims, in which that side of the disk-like closure element which faces the interior of the discharge vessel is coated with a reflective layer.
The discharge lamp as claimed in one of the preceding claims, in which the discharge tube projects beyond the closure element (7).
The discharge lamp as claimed in one of the preceding claims, in which the discharge tube (1) and the disk-like closure element (7) consists of the same type of glass.
Dependencies are inferred from the claim text.