Global Patent Index - EP 0237647 A1

EP 0237647 A1 19870923 - Motor vehicle discharge lamp.

Title (en)

Motor vehicle discharge lamp.

Title (de)

Kraftfahrzeugentladungslampe.

Title (fr)

Lampe à décharge pour véhicule.

Publication

EP 0237647 A1 19870923 (DE)

Application

EP 86118079 A 19861227

Priority

DE 8601283 U 19860120

Abstract (en)

[origin: US4794297A] To provide light distribution required by legal and safety requirements for automotive head lamps from a discharge lamp, a discharge vessel or bulb (2, 12) is retained within an outer bulb (7, 17), which outer bulb is made of hard glass and is coated at the outside with a visible light radiation absorbing coating (8, 18) directly applied to the outer bulb, and placed thereon to provide the desired light distribution. Thus, standard silicon iron oxide black can be used for the coating. Preferably, the inside of the outer bulb has a coating of infrared absorbing, visible light transmitting material applied thereto.

Abstract (de)

Das Entladungsgefäß (12) aus Quarzglas ist von einem evakuierten Hüllkolben (17) aus Hartglas umgeben, auf dem eine das bei Kraftfahrzeuglampen herkömmliche asymmetrische Abblendlicht erzeugende Beschichtung (18) aus Silizium-Eisenoxid aufgetragen ist. Der transparente Teil des Hüllkolbens (17) ist an seiner Innenoberfläche mit einer IR-Strahlung reflektierenden und sichtbare Strahlung transmittierenden Beschichtung (20) versehen.

IPC 1-7

F21M 3/00; H01J 61/35; H01K 1/32

IPC 8 full level

H01J 61/34 (2006.01); H01J 61/35 (2006.01); H01J 61/36 (2006.01); H01J 61/82 (2006.01)

CPC (source: EP US)

H01J 61/35 (2013.01 - EP US); H01J 61/82 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

DE 8601283 U1 19860828; EP 0237647 A1 19870923; JP S62120254 U 19870730; US 4794297 A 19881227

DOCDB simple family (application)

DE 8601283 U 19860120; EP 86118079 A 19861227; JP 561387 U 19870120; US 94761686 A 19861230