EP 0891628 B1 20030910 - INCANDESCENT LAMP WITH A REFLECTING COATING
Title (en)
INCANDESCENT LAMP WITH A REFLECTING COATING
Title (de)
GLÜHLAMPE MIT REFLEXIONSSCHICHT
Title (fr)
LAMPE A INCANDESCENCE A COUCHE DE REFLEXION
Publication
Application
Priority
- DE 9800149 W 19980119
- DE 19701792 A 19970120
Abstract (en)
[origin: DE19701792A1] An electric incandescent lamp, in particular a halogen incandescent lamp (9) with a rotationally symmetrical lamp bulb (10) and an I.R. radiation reflecting coating (14), has an ellipsoidal partial contour. The ellipsoidal partial contour of the lamp bulb is produced by an elliptical section, the semiaxis of which is oriented vertically to the longitudinal axis, i.e. vertically to the rotational axis of the lamp bulb (10), and is longer than the greatest radius R of the lamp bulb. The length of the smallest semiaxis b lies preferably in the range R < b < R + 5 . wr, where R and wr respectively stand for the greatest radius of the lamp bulb (10) and the radius of the rotationally symmetrical luminous element (15). The lamp (9) is characterized by uniform back reflection of the I.R. radiation onto the luminous element (15) arranged centrically on-axis inside the lamp bulb (10), and thus by a regular temperature distribution, as well as by increased lamp efficiency.
IPC 1-7
IPC 8 full level
CPC (source: EP KR US)
H01K 1/28 (2013.01 - EP KR US)
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
US 6160341 A 20001212; CA 2249374 A1 19980723; CA 2249374 C 20060321; CN 1146014 C 20040414; CN 1216156 A 19990505; DE 19701792 A1 19980723; DE 59809533 D1 20031016; EP 0891628 A1 19990120; EP 0891628 B1 20030910; HU 223239 B1 20040428; HU P0000469 A2 20000628; HU P0000469 A3 20000728; JP 2000507388 A 20000613; JP 4223563 B2 20090212; KR 100420874 B1 20040417; KR 20000064567 A 20001106; TW 360895 B 19990611; WO 9832157 A1 19980723
DOCDB simple family (application)
US 14257998 A 19980911; CA 2249374 A 19980119; CN 98800048 A 19980119; DE 19701792 A 19970120; DE 59809533 T 19980119; DE 9800149 W 19980119; EP 98906822 A 19980119; HU P0000469 A 19980119; JP 53352798 A 19980119; KR 19980707060 A 19980908; TW 86119963 A 19971230