Global Patent Index - EP 0152026 B1

EP 0152026 B1 19880629 - FEEDING DEVICE FOR CONTROLLING THE LIGHT INTENSITY OF AT LEAST ONE DISCHARGE LAMP, AND USE OF THIS DEVICE

Title (en)

FEEDING DEVICE FOR CONTROLLING THE LIGHT INTENSITY OF AT LEAST ONE DISCHARGE LAMP, AND USE OF THIS DEVICE

Publication

EP 0152026 B1 19880629 (FR)

Application

EP 85101029 A 19850201

Priority

FR 8401800 A 19840203

Abstract (en)

[origin: US4649322A] The arrangement of the invention enables control of a light emitting element comprising at least one discharge tube. Firing of the tube is effected by a generator which provides voltage pulses at predetermined periodic intervals (Tr). The luminous intensity of the tube is controlled by a D.C. source which enables application of a discharge maintenance current to the tube, the duration of application (Tc) of which depends on an instruction signal. A circuit is provided to assure synchronism between the application of the voltage pulse and the maintenance current. The arrangement may be applied in matrix displays.

IPC 1-7

H05B 41/392

IPC 8 full level

G09G 3/28 (2013.01); G09G 3/282 (2006.01); H05B 41/36 (2006.01); H05B 41/38 (2006.01); H05B 41/392 (2006.01)

CPC (source: EP KR US)

H05B 41/36 (2013.01 - KR); H05B 41/38 (2013.01 - EP US); H05B 41/3927 (2013.01 - EP US)

Designated contracting state (EPC)

CH DE GB IT LI NL

DOCDB simple family (publication)

EP 0152026 A1 19850821; EP 0152026 B1 19880629; AU 3828785 A 19850808; AU 578263 B2 19881020; CA 1227528 A 19870929; DE 3563584 D1 19880804; FR 2559334 A1 19850809; FR 2559334 B1 19880226; JP H0447959 B2 19920805; JP S60189196 A 19850926; KR 850006296 A 19851002; KR 900000669 B1 19900202; SG 42291 G 19910726; US 4649322 A 19870310

DOCDB simple family (application)

EP 85101029 A 19850201; AU 3828785 A 19850201; CA 472908 A 19850125; DE 3563584 T 19850201; FR 8401800 A 19840203; JP 1670785 A 19850201; KR 850000521 A 19850128; SG 42291 A 19910607; US 69392385 A 19850123