Global Patent Index - EP 1034397 A1

EP 1034397 A1 2000-09-13 - FLAT LIGHTING DEVICE

Title (en)

FLAT LIGHTING DEVICE

Title (de)

FLACHE BELEUCHTUNGSVORRICHTUNG

Title (fr)

DISPOSITIF D'ECLAIRAGE PLAT

Publication

EP 1034397 A1 (DE)

Application

EP 99969781 A

Priority

  • DE 9902881 W
  • DE 19844921 A
  • DE 19905219 A

Abstract (en)

[origin: WO0019144A1] The invention relates to a flat lighting device (8; 32) comprising an aperture fluorescent lamp (33), an optical system (10; 34) and a light-conducting plate (11; 35). The optical system (10; 34) influences the distribution of the light to be coupled into the light-conducting plate in a targeted manner such that in the cross-sectional plane of the tubular discharge vessel of the lamp the light distribution has at least one maximum in the angular separation ( beta , in relation to the optical axis A, where said angular separation ( beta satisfies the relationship (I), in which L is the longitudinal dimension of the light-conducting plate (i.e. its dimension in the direction of the optical axis A and d is the thickness of said plate. In this way a high luminance is obtained at the front side (39) of the light-conducting plate.

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

F21V 8/00

IPC 8 full level (invention and additional information)

G02F 1/13357 (2006.01); F21V 8/00 (2006.01); G09F 9/00 (2006.01); H01J 65/00 (2006.01); F21Y 103/00 (2006.01); G02B 6/00 (2006.01)

CPC (invention and additional information)

G02B 6/002 (2013.01); G02B 6/0071 (2013.01); G02B 6/0031 (2013.01)

Citation (search report)

See references of WO 0019144A1

Designated contracting state (EPC)

AT BE CH DE FI FR GB IT LI NL

EPO simple patent family

WO 0019144 A1 20000406; CA 2312225 A1 20000406; CA 2312225 C 20080715; CN 1105855 C 20030416; CN 1287604 A 20010314; DE 19905219 A1 20000831; EP 1034397 A1 20000913; HU 0004329 A2 20010428; HU 0004329 A3 20030728; HU 224262 B1 20050728; JP 2002525837 A 20020813; KR 100389505 B1 20030625; TW 518404 B 20030121; US 6454451 B1 20020924

INPADOC legal status


2007-12-19 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20070703

2006-09-06 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20050907

2004-05-26 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION):

- Designated State(s): AT BE CH DE FI FR GB IT LI NL

2000-09-13 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000503

2000-09-13 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

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