Global Patent Index - EP 1041603 A1

EP 1041603 A1 2000-10-04 - HIGH-VOLTAGE DISCHARGE LAMP AND LIGHTING DEVICE

Title (en)

HIGH-VOLTAGE DISCHARGE LAMP AND LIGHTING DEVICE

Title (de)

HOCHSPANNUNGENTLADUNGSLAMPE UND LEUCHTVORRICHTUNG

Title (fr)

LAMPE A DECHARGE HAUTE TENSION ET DISPOSITIF D'ECLAIRAGE

Publication

EP 1041603 A1 (EN)

Application

EP 99929830 A

Priority

  • JP 9903797 W
  • JP 21012098 A

Abstract (en)

The high-pressure discharge lamp of the present invention comprises a light-transmitting ceramic discharge vessel (1), power-supplying conductors (2), a pair of electrodes (3,3), seals made of ceramic-sealing compound (4), and a discharge medium. The light-transmitting ceramic discharge vessel(1) has an inner volume of 0.1 cc or less and comprises a bulging section (1a) and small-diameter cylindrical sections (1b, 1b), the bulging section having both ends narrowed by a continuous curved surface, and the small-diameter cylindrical sections communicating with the ends of the bulging section and having an inner diameter smaller than the bulging section. Power-supplying conductors (2) comprises a seal part (2a) and a halide-resistant part (2b) having a proximal end connected to the distal end of the seal part. The conductors are inserted in small-diameter cylindrical sections (1b) of the light-transmitting ceramic discharge vessel (1), and each of the halide-resistant parts (2b) forms a narrow gap to the inner surface of the small-diameter cylindrical sections (1b). A pair of the electrodes (3) are respectively provided at distal ends of the halide-resistant parts (2b) and positioned in the bulging section (1a) of the light-transmitting ceramic discharge vessel (1), such that a distance d1 of 1.0 mm or more is maintained between the distal ends of the electrodes and the inner surface of the light-transmitting ceramic discharge vessel (1) on a plane which is perpendicular to the axis of the vessel and includes the distal ends of the electrodes. Seals (4) made of ceramic-sealing compound seals respectively the gaps between the small-diameter cylindrical sections (1b) of the light-transmitting ceramic discharge vessel (1) and the seal parts (2a) of the power-supplying conductor(2). The discharge medium contains a metallic halide and is filled in the light-transmitting ceramic discharge vessel (1). <IMAGE>

IPC 1-7 (main, further and additional classification)

H01J 61/88; H01J 61/36

IPC 8 full level (invention and additional information)

H01J 61/073 (2006.01); H01J 61/30 (2006.01); H01J 61/36 (2006.01); H01J 61/82 (2006.01); H01J 61/88 (2006.01)

CPC (invention and additional information)

H01J 61/827 (2013.01); H01J 61/36 (2013.01); H01J 61/073 (2013.01); H01J 61/30 (2013.01)

Designated contracting state (EPC)

BE DE GB

EPO simple patent family

WO 0005746 A1 20000203; EP 1041603 A1 20001004; EP 1041603 A4 20011107; JP 2000048769 A 20000218; JP 4297227 B2 20090715

INPADOC legal status


2010-03-24 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20091006

2005-06-08 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20050421

2001-11-07 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20010921

2001-11-07 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): BE DE GB

2000-10-25 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- Free Format Text: 7H 01J 61/88 A, 7H 01J 61/36 B, 7H 01J 61/82 B

2000-10-04 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000803

2000-10-04 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): BE DE GB