초록 ▼

To control the light distribution of light emitted from a high-pressure discharge bulb (1) asymmetrically, to meet automotive head lamp legal and design requirements, a single unitary combination bulb holder and light distribution element (11) is secured to the base sleeve (4) for example by plastic

To control the light distribution of light emitted from a high-pressure discharge bulb (1) asymmetrically, to meet automotive head lamp legal and design requirements, a single unitary combination bulb holder and light distribution element (11) is secured to the base sleeve (4) for example by plastic rivets (8) securing a unitary bottom plate (9) to an alignment body (5, 6) which, in turn, is positioned in the base in predetermined relation to a base positioning ring (15) formed thereon. The light distribution body is trough-shaped, with the concave surface (14) facing the bulb, and extends parallel thereto.

대표청구항 ▼

Automotive head lamp, particularly high-pressure discharge head lamp, having an elongated lamp bulb (1); a pair of electrodes extending outwardly of said bulb from terminal ends thereof and inwardly of the bulb towards an intermediate region thereof, said electrodes being sealed into said terminal e

Automotive head lamp, particularly high-pressure discharge head lamp, having an elongated lamp bulb (1); a pair of electrodes extending outwardly of said bulb from terminal ends thereof and inwardly of the bulb towards an intermediate region thereof, said electrodes being sealed into said terminal ends; a base sleeve (4) secured to one end of the lamp; a bulb holder (5) secured to the base sleeve (4); at least two base terminals (13, 13) being respectively electrically connected to the electrodes; means for holding the other end of the bulb in position such that the elongated bulb extends axially from the base; and light distribution control means in the form of a shield element (11) made of electrically insulating high-temperature resistant material for controlling the direction and distribution of light emitted from the lamp, wherein the shield element (11) comprises an elongated trough or groove element, the concave or groove side (14) of which is directed to face the lamp bulb, and a support plate (9) attached to the shield element (11) is connected to the bulb holder (5) by connection means (8), and wherein the light distribution and control means form part of said means (5) for holding the other end of the lamp bulb in position.