Abstract:
A gas-discharge lamp (1) is described having two electrodes (4, 5) that project into the discharge vessel (3) of the lamp. The lamp further comprises an outer envelope (18) that surrounds the discharge vessel (3), with an airtight seal, while leaving an outer cavity (20) between itself and the discharge vessel (3) and that is filled with a gas at a pressure of not more than 1,000 mbar. In the outer cavity (20), there is a single conductor, electrically connected to one of the electrodes, that is in direct contact with the gas filling in the cavity (20) to allow a high-voltage pulse to be applied for igniting a discharge between the conductor and its surroundings. Also described are a method of operating a gas-discharge lamp of this kind and various methods of producing gas-discharge lamps of this kind.
Abstract:
The invention relates to a high-intensity discharge lamp for a vehicle-light projector system, comprising a base (4) that carries an outer envelope (1) in which a burner (2) is arranged, the burner (2) comprising a discharge chamber (21) into which two electrodes (22, 23) project, the discharge chamber (21) being filled at least with an inert gas, a mixture of metal halides and a salt reservoir, the so-called “salt lake” (25). The outer envelope (1) has a coating (31) in strip form that screens off light and that extends, on the side of the outer envelope (1) adjacent the salt lake (25), for at least 40% of the length of the outer envelope (1) and whose width covers an angle of between 90° and 180° around the outer envelope (1). The invention also relates to a projector system for motor vehicle headlamps comprising at least one high-intensity discharge lamp of this kind.
Abstract:
A high-pressure discharge lamp which is suitable for motor vehicle headlights, has an improved color point stability close to the black body locus, a high color temperature, and a high luminous efficacy (lm/w). The high-pressure discharge lamp includes an inner vessel with a discharge chamber, with at least two electrodes extending into the discharge chamber, and an outer bulb surrounding the inner vessel. The discharge chamber contains an ionizable filling including at least one rare gas, 0-10 mg of mercury, and a metal halide mixture. The metal halide mixture includes 40-80% by weight of sodium halide, 25-55% by weight of scandium halide, 1-15% by weight of indium halide, and 0-34% by weight of thallium halide.
Abstract:
A gas discharge lamp has an inner bulb with a discharge vessel with two sealing sections thereon, from which electrodes protrude into the discharge vessel, each electrically connected with a conductor in the associated sealing section to supply current to the electrodes. The lamp also has an outer bulb surrounding the discharge vessel, leaving a cavity therebetween. Close to at least one of the electrodes in or near a transitional area between the discharge vessel and the associated sealing section on an outside of the inner bulb is arranged potential-free a conductive structure which on application of a voltage to the electrodes influences the electrical field adjacent the electrodes such that a discharge arc travels from the electrode first in the direction of a wall section of the discharge vessel adjacent the electrode and then over the inside of the wall toward the other electrode.
Abstract:
The invention describes a mercury-free high intensity gas-discharge lamp (1) comprising a discharge vessel (5) enclosing a fill gas in a discharge chamber (2) and comprising a pair of electrodes (3, 4) extending into the discharge chamber (2), for which lamp (1) the fill gas in the discharge chamber (2) is free of zinc iodide, and the fill gas includes a halide composition comprising sodium iodide and scandium iodide to a combined proportion of at least 30 wt % and at most 95 wt %, and thulium iodide, to a proportion of at least 5 wt % and at most 70 wt %.
Abstract:
The invention describes a gas-discharge lamp (1) comprising a vessel (5), which vessel (5) is partially coated with at least one longitudinal stripe (SH, SH′) arranged on the surface of the vessel (5) below a horizontal plane (P) through a longitudinal axis (X) through the centre of the lamp (1) such that, on each side of the lamp, an angle (βH1, βH2) subtended at the lamp centre by the horizontal plane (P) and an upper edge (16, 17) of the longitudinal stripe (SH, SH′) on that side of the lamp comprises at least 10°, more preferably at least 13°, most preferably at least 15°. The invention also describes a reflector (8) for a lamp (1), comprising a reflective interior surface realised to deflect light (L20A, L20B, L21A, L21B) originating from the lamp (1) outward to give a specific beam profile (3) with a bright/dark cut-off line (31) and a shoulder (32), and wherein the lamp (1), in particular a lamp (1) according to any of claims 1 to 12, is positioned horizontally in the reflector (8), and wherein the reflective interior surface comprises at least one beam-shaping region (81 A, 81B) realised to deflect a portion (L21A, L21B) of the light (L20A, L20B, L21A, L21B), emitted from the lamp (1) between 7.5° and 15° below a horizontal plane (P), at a specific region (21A, 21B) within the beam profile (3). The invention further describes a lighting assembly (9) comprising such a reflector (8) and a lamp (1), in particular a lamp (1) according to the invention.
Abstract:
The invention relates to a lamp for motor vehicle headlamps, and in particular a high intensity discharge lamp, comprising at least one envelope which is arranged on a base and which is provided with two coatings arranged diametrically opposite one another, wherein the coatings (3) are identical in form and project at least 0.5 millimeters upwards beyond a horizontal plane in which, when the lamp is in the burnt-in position, the reference axis (R) which passes through the center of the base (4) lies.
Abstract:
The invention relates to illumination devices (1) with a light source (2) and an afterglow surface (4) comprising a phosphor. The phosphor has an afterglow emission peak at a temperature above about 100° C. and/or has the formula (Sr1-zMz)4Al14O25:Eu, Ln, Xk with M ε {Ca, Ba, Mg}, Ln ε {Dy, Nd}, X ε {Yb, Tm, Sm}.
Abstract:
The invention relates to a high-pressure discharge lamp 1 comprising at least one burner 2 having a discharge space, and comprising two electrodes extending in the discharge space, a gas filling in the discharge space comprising at least an inert gas and a metal halide mixture, a tubular outer bulb 3 having two ends, the burner 2 being attached, at least at one end, to the outer bulb 3, said outer bulb 3 comprising at least one light-absorbing means 5 and at least one interference filter 6, and an interference filter 4 being arranged on or in at least a part of the burner 2.
Abstract:
The invention relates to a lamp for a vehicle headlight with low-beam function, which lamp has an outer envelope (4) and emits at least visible light of different colors from several regions of the outer envelope (4), characterized in that in that a partial coating (2) is at least provided on the outer envelope (4) such that, when the low-beam function is being realized, at least that region of the traffic space which lies above the bright-dark cut-off can be at least partly illuminated with visible colored light which is scattered at said partial coating (2), while at the same time that region of the traffic space which lies below the bright-dark cut-off can be illuminated with visible light of a different color in defined regions.