Abstract:
A lighting apparatus may include an electrically conductive housing, in whose interior at least one light source and at least one electromagnetic radiation-emitting circuit component configured to operate the at least one light source are arranged; and an electrically conductive cover configured to cover the at least one circuit component; wherein the cover and the housing are electrically connected to one another.
Abstract:
A lighting device includes at least one light-emitting diode (3) and a cooling aggregate (1) for cooling the at least one light-emitting diode (3), wherein the cooling aggregate (1) is provided with locking elements (17, 18, 19) adapted to form a bayonet catch with a fixing device (30) holding the lighting device. Preferably, at least one of the lighting devices is mounted as the light source in a vehicle headlight.
Abstract:
A solid-state light source (10) comprising a plurality of LED units (12) arrayed to emit light generally about an axis (14). Each of the LED units (12) can comprise a number of LEDs, for example, up to five. They may all emit in a single color or multiple colors can be combined for a specific effect. A light transmissive light guide (16) is associated with the LED units (12) and has a plurality of input widows (18). Each LED unit (12) faces a respective input window (18) and each window (18) transversely intercepts the axis (14) and receives light from the LED units (12). The input windows (18) lead to a common output window (20) that is axially aligned with the input windows (18). The light guide (16) has smooth sidewalls (22) that extend between the input windows (18) and the output window (20).
Abstract:
A high-pressure discharge lamp, in particular a mercury-free high-pressure discharge lamp for a vehicle headlight, has a lamp base (1) and an axially symmetrical discharge vessel (30), in whose discharge space (300) an ionizable filling, containing metal halides, and electrodes (31, 32) are arranged for producing a gas discharge. The discharge vessel (30) is provided with transparent, partial frosting (37), which is limited to a section of the inside or outside of the discharge vessel (30) extending over part of the discharge vessel circumference, this section having a well-defined position with respect to the lamp base (1). Moreover, a simple production method is proposed for partial frosting (37) which is preferably arranged on the inside of the discharge vessel (30).
Abstract:
A lighting device is disclosed, which is provided for the front region of a motor vehicle, for example in a motor vehicle headlight, and which emits electromagnetic radiation during operation. The lighting device comprises at least one first primary radiation source which emits infrared radiation, and at least one second primary radiation source which emits visible light, wherein the first primary radiation source and the second primary radiation source are arranged in such a way that the second primary radiation source outshines the first primary radiation source and thus generates a color impression of the lighting device which deviates from the color impression stemming from the infrared radiation source alone.
Abstract:
The invention relates to a light-emitting diode module for a vehicle headlamp, which has a carrier for a number of light-emitting diodes and which carrier has a lateral surface of axially symmetrical design relative to a longitudinal axis, a number of light-emitting diodes being arranged on the lateral surface of the carrier, and the carrier being provided with at least one light directing means in order to direct in directions transverse to the longitudinal axis of the carrier the light emitted by the light-emitting diodes.
Abstract:
A high-pressure discharge lamp, in particular a mercury-free high-pressure discharge lamp for a vehicle headlight, has a lamp base (1) and an axially symmetrical discharge vessel (30), in whose discharge space (300) an ionizable filling, containing metal halides, and electrodes (31, 32) are arranged for producing a gas discharge. The discharge vessel (30) is provided with transparent, partial frosting (37), which is limited to a section of the inside or outside of the discharge vessel (30) extending over part of the discharge vessel circumference, this section having a well-defined position with respect to the lamp base (1). Moreover, a simple production method is proposed for partial frosting (37) which is preferably arranged on the inside of the discharge vessel (30).
Abstract:
The invention relates to a light-emitting diode module for a vehicle headlamp, the carrier of which module has cambered surfaces on which the light-emitting diodes are arranged, and to a vehicle headlamp which is fitted with one or more of these light emitting diode modules, in order to generate the dimmed headlight, high beam, fog lamp, parking light or daytime running light exclusively using light-emitting diodes as light sources.
Abstract:
An apparatus for operating a discharge lamp from an on-board voltage source of a motor vehicle. The discharge lamp is operated at a first electrical power to produce a taillight and is operated with a second, higher power to produce a signal light.
Abstract:
The invention relates to a discharge lamp whose discharge vessel (1) is pided with a light-transmitting, electrically conductive layer (4) in order to improve the electromagnetic compatibility of the lamp when it is operated from an electronic operating unit. The light-transmitting, electrically conductive layer (4) is advantageously connected to the circuitry-internal ground potential of the operating unit.