Global Patent Index - EP 0866646 A3

EP 0866646 A3 2000-05-31 - Process and circuit for operating at least one discharge lamp

Title (en)

Process and circuit for operating at least one discharge lamp

Title (de)

Verfahren und Schaltungsanordnung zum Betrieb mindestens einer Entladungslampe

Title (fr)

Procédé et circuit pour alimenter au moins une lampe à décharge

Publication

EP 0866646 A3 (DE)

Application

EP 98103764 A

Priority

DE 19711183 A

Abstract (en)

[origin: EP0866646A2] The method involves using a lamp with a gastight closed discharge vessel with an ionisable filling and electrodes inside between which a gas discharge is formed. The lamp are operated to create a tail lamp with a first, minimal electrical power and a signalling lamp with a second, higher electrical power. Preferably, the second, higher power is at least twice the size as the first minimal power. The signalling lamp is a stop lamp. The ionisable filling of the lamp contains neon. The lamps are fed by a medium frequency supply voltage and an operating parameter is controlled by pulse width modulation.

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

H05B 41/42; H05B 41/29

IPC 8 full level (invention and additional information)

H05B 41/36 (2006.01); H05B 41/392 (2006.01); H05B 41/42 (2006.01)

CPC (invention and additional information)

H05B 41/36 (2013.01); H05B 41/3927 (2013.01); H05B 41/42 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 0866646 A2 19980923; EP 0866646 A3 20000531; CA 2232328 A1 19980918; DE 19711183 A1 19980924; HU 219249 B 20010328; HU 9800595 A2 19981028; HU 9800595 A3 20000328; HU 9800595 D0 19980528; JP H10270190 A 19981009; US 6411040 B1 20020625

INPADOC legal status


2004-08-04 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20040129

2002-10-09 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020822

2001-02-07 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: BE DE ES FR GB IT NL SE

2000-09-27 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000801

2000-05-31 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-05-31 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI

2000-05-31 [RIC1] CLASSIFICATION (CORRECTION)

- Free text: 7H 05B 41/42 A, 7H 05B 41/29 B

1998-09-23 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): BE DE ES FR GB IT NL SE

1998-09-23 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI