Abstract: A flat fluorescent light (1), comprises a discharge vessel that is composed of a based plate (3), face plate (4) and frame (5). A contact system (2) for connecting an electric power supply device by connection lines is integrated into the narrow side of the flat fluorescent light. An insulation body, provided with U-shaped contact sections is located between a section of the base plate (3) and face plate (4), the section acting as a receptacle and projecting beyond the frame (5) of the discharge vessel. The contact surface of the contact sections are connected to the electrodes of the flat florescent light by connection surfaces of the receptacle. The connection parts of the contact sections are connected to the connection lines.

Abstract: The invention relates to a novel operating device for lamps, in particular low-pressure gas discharge lamps, in which a SEPIC converter is used for charging a storage transistor from an AC voltage supply. In this case, the SEPIC converter is regulated to an output quantity as regulated variable, its operating frequency being altered. Preferably, only the switch-on time and not the switch-off time of the switching transistor of the SEPIC converter is altered in this case.

Abstract: A discharge vessel with an excimer fill comprises a cap, electrodes and a fill having at least one noble gas and a halogen, which, when the lamp is operating, together form an excimer, the discharge vessel being manufactured from quartz glass. The inner wall of the discharge vessel is completely covered with a passivation layer of a metal oxide of the metals Al, Hf, Y or Sc or the mixed oxides thereof, the layer having an amorphous structure and its layer thickness being 20 to 200 nm.

Abstract: The invention relates to an improved color display with temporary sequential primary color mixing, in the case of which a discharge lamp for dielectrically impeded discharges is used for backlighting.

Abstract: A gas discharge lamp base (1) with a starting device has a carrier part (16) for electronic components (23 through 30) of the starting device. The carrier part (16) has a top side and a bottom side. Only high voltage-carrying components (23 through 26) of the starting device are arranged on the one side of the carrier part (16), and only low voltage-carrying components (27 through 30) of the starting device are arranged on the other side (low voltage side) of the carrier part (16).

Abstract: Fluorescent material from the class of the silicide nitrides, Sr being used as cation, and the suicide nitrides being doped with trivalent Ce.

Abstract: The invention relates to a ballast for operating at least one low-pressure discharge lamp, preferably a three- or four-lamp ballast. In order for all parallel- or series-connected low-pressure discharge lamps (L40-L43) to shine equally bright even in the case of strong dimming, the ballast according to the invention has a transformer (Tr40) for balancing the currents in the lamp branch circuits and a transformer (Tr41) for compensating the losses owing to parasitic capacitances.

Abstract: A reflector-containing semiconductor component (21) which comprises a radiation-emitting LED (22) is seated in a housing which comprises at least one base part (30) and a reflector (23) for the radiation from the LED, the LED (22) being fastened on a platform (25) in the vertex of the reflector.

Abstract: The invention relates to a double-filament halogen incandescent lamp for a motor vehicle headlamp. In order to reduce the light shading effects caused by the filament holder, at least one of the power supply wires (8) is provided with a section (8a) that projects out of the common plane of the power supply wires (7, 8, 9) and is guided past the main filament (5), this section (8a) being shaped such that light beams that are emitted by the main filament (5) perpendicular to its filament axis are not obstructed by the power supply wire (8).

Abstract: The headlight bulb includes at least one lamp body (1), at least one luminous element (3) enclosed within the at least one lamp body (1), a lamp base (2) in which the at least one lamp body (1) is fixed and power connectors (4, 5) for supply of energy to the at least one luminous element (3). The lamp base (2) includes a base flange (20) and at least three reference tangs (21), which are arranged on a plane, which is level with the plane of the base flange (20). The base flange (20) further includes three clips (22) arranged around the circumference thereof, which are sprung in a direction perpendicular to the plane of the base flange and which cooperate with the reference tangs (21) to mount the bulb in a headlight.

Abstract: The invention relates to an operating circuit for a discharge lamp, having a detection circuit for identifying the proximity to capacitive operation, which uses lamp current fluctuations for detection purposes.

Abstract: The present invention relates to oxidic nanocrystals and a process and apparatus for producing oxidic nanocrystals from metalorganic compounds or volatile inorganic compounds. In particular, the process is suitable for oxidic or oxysulfidic nanocrystals, particularly based on the elements Y, Gd, Mg, Ca, Ba and Al. The nanocrystals preferably have a mean initial particle size of 1 to 20 nm.

Abstract: A high efficiency phosphor from the class of the thiometallates, preferably of the thiogallates. The thiometallate being made so as to correspond to the formula (AS)·w(B2S3), where A is at least one divalent cation selected from Mg, Ca, Sr, and where B is at least one trivalent cation selected from Al, Ga, Y. The factor w may lie either in the range 0.8 ≦w ≦0.98 or in the range 1.02 ≦w ≦1.2.

Abstract: A silent discharge lamp which comprises a discharge vessel filled with a gas fill, a plurality of electrodes divided into separately operable groups, a dielectric layer between at least one anode part of the electrodes and the gas fill, and a luminescent layer which has elementary luminescent surfaces of at least two respective luminescent colors. Each elementary luminescent surface is assigned to a different electrode group. The electrode groups and the elementary luminescent surfaces are in each case two-dimensionally interleaved relative to one another so that the light emission surface of the gas discharge lamp can essentially be lit using each electrode group on its own, and the gas discharge lamp is designed so that it is possible to control the color of the light emission by controlling simultaneous operation of the electrode groups.

Abstract: The invention relates to a printing method for applying dielectric layers made of solder glass on strip-shaped metal electrodes of discharge lamps, which are operated by means of pulsed dielectrically inhibited discharge. An aggregate having a higher melting temperature than solder glass, e.g. crystalline or amorphous aluminum oxide or quartz glass powder, is used as printing paste in said method. The typical percentage by weight of the aggregate is between 2 and 30%. Better wetting of the strip-shaped metal electrode is thus obtained.

Abstract: A discharge lamp (1) with a base (2), suitable for operation by means of a dielectrically impeded discharge, has a spacing between the base (2) and the outer wall of the discharge vessel (3). The overall efficiency of the generation of UV radiation is improved thereby.

Abstract: An opto-electronic semiconductor element has a radiation emitting or receiving, that is, radiation active semiconductor chip secured to an electrically conductive base frame. One, or a plurality of chips, are surrounded by a housing which may be integral with or have, separately, a cover. All materials of the housing, as well as of the conductive base frame, have mutually matching thermal coefficients of expansion within the temperature ranges which arise during manufacture and in application of the semiconductive element, singly or as a plurality in a common housing. Glass, quartz glass, ceramic or glass ceramic are suitable for the housing or parts thereof; the conductive base frame is preferably made of cladded or jacketed copper wire or strip with an iron-nickel core. Assembling a plurality of chips in a housing which has a luminescence conversion layer, e.g. a phosphor applied thereto, permits construction of a flat light source.

Abstract: An illumination unit having at least one LED as light source, the LED emitting primary radiation in the range from 300 to 430 nm, this radiation being completely converted into longer-wave radiation by phosphors which are exposed to the primary radiation of the LED, in which unit the conversion takes place at least with the aid of a phosphor which emits green with a peak emission wavelength at 495 to 540 nm and which originates from the class of the Ce-activated sialons, the sialon corresponding to the formula Mp/2Si12−p−qAlp+qOqN16−q:Ce3+, where M=Ca individually or in combination with Sr, with q=0 to 2.5 and p=0.5 to 3.

Abstract: A phosphor for light sources, the emission from which lies in the short-wave optical spectral region, as a garnet structure A3B5O12. It is activated with Ce, the second component B representing at least one of the elements Al and Ga, and the first component A is terbium or terbium together with at least one of the elements Y, Gd, La and/or Lu. In a preferred embodiment, a phosphor having a garnet of structure (Tb1−x−yRExCey)3(Al,Ga)5O12, where RE=Y, Gd, La and/or Lu; 0≦x≦0.5−y; 0<y<0.1 is used.

Abstract: An illumination unit having at least one LED as light source, the LED emitting primary radiation in the range from 300 to 570 nm, this radiation being partially or completely converted into longer-wave radiation by phosphors which are exposed to the primary radiation of the LED, in which unit the conversion takes place at least with the aid of a nitride-containing phosphor which emits with a peak emission wavelength at 430 to 670 nm and which originates from the class of the Ce- or Eu-activated nitrides, oxynitrides or sialons.