Munich, Germany
Munich, Germany

OSRAM Licht AG is a multinational lighting manufacturer headquartered in Munich, Germany. It is a world-leading lighting manufacturer.OSRAM was founded in 1919 by the merger of the lighting businesses of Auergesellschaft, Siemens & Halske and Allgemeine Elektrizitäts-Gesellschaft . On 5 July 2013, OSRAM was spun off from Siemens, the listing of the stocks began on 8 July 2013 on Frankfurt Stock Exchange. Wikipedia.


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A protection device (10) for electrical lighting systems (S) includes:- first (L1) and second (L2) electrical supply lines and a neutral line (N), the second supply line (L2) being switchable (SW) between a floating state and a powered state, and- a PTC thermistor (12) interposed between second line (L2) and neutral line (N), said PTC thermistor (121) having a first and a second impedance value when when said second supply line (L2) is respectively in the floating state and in the powered state, the second impedance value being higher than the first impedance value.


The invention relates to a method for separating regions of a semiconductor layer and for introducing an outcoupling structure into an upper side of the semiconductor layer, the outcoupling structure being provided to couple light out of the semiconductor layer. The upper side of the semiconductor layer is covered by a mask having first openings for introducing the outcoupling structure and at least a second opening, which is provided to introduce a separating trench into the semiconductor layer. With the aid of an etching method, the outcoupling structure is introduced into the upper side of the semiconductor layer in the region of the first openings and simultaneously a separating trench passing through the semiconductor layer is introduced into the semiconductor layer via the second opening, and a region of the semiconductor layer is separated.


There is described an electronic half-bridge converter for providing a power signal (V_(o), i) via an output (106). The electronic converter comprises a resonant circuit and a half-bridge (S_(1), S_(2)) comprising a first (S_(1)) and a second (S_(2)) electronic switch connected in series, for connecting selectively the resonant circuit to a supply signal (V) or a ground (GND_(1)). Specifically, resonant circuit (RES) comprises:- a transformer (T) comprising a primary winding (T1) and a first (T2) and a second secondary winding (T3),- at least one capacitor (C_(RP)), wherein said capacitor (C_(RP)) and primary winding (T1) are connected in series between the intermediate point of the half-bridge and supply signal (V) and/or ground (GND_(1)),- an electronic switch (D),- a first branch connected in parallel with electronic switch (D) and comprising a first capacitor (C_(RS)) connected in series with first secondary winding (T2), and- a second branch connected in parallel with said electronic switch (D) and comprising the second secondary winding (T3) connected in series with output (106).


Patent
Osram | Date: 2017-01-03

The Power Supply Unit comprises an output providing electrical power between a positive power supply line and a common ground line and a communication line. An adjustable current generator responsive to an internal measurement signal generates an output current at the output, and a voltage source is coupled to the communication line. A current measurement unit measures a current through the communication line and generates the internal measurement signal depending on the measured current through the communication line. Specifically, the Power Supply Unit is configured to determine the voltage drop on the common ground line by applying via the voltage source two different voltages to the communication line.


The invention relates to a circuit arrangement for operating a load, comprising an input for supplying an alternating system input voltage, a rectifier circuit, a converter circuit which converts the alternating system input voltage rectified by the rectifier circuit into an output voltage, a control circuit for controlling the converter circuit, and a linear regulating circuit which sets a predefined load current on the load, said load current being a direct current. The control circuit controls the converter circuit in such a way that the intensity of the load current is reduced when the output voltage is at a minimum.


Patent
Osram | Date: 2017-05-17

A semiconductor lamp (1) has at least one semiconductor light source (8) arranged on a front face (7) of a substrate (6) and a driver circuit (11) for activating the at least one semiconductor light source (8), at least part of the driver circuit (11) being secured on a rear face (10) of the substrate (6), facing away from the at least one semiconductor light source (8). The invention can be used, in particular, for retrofit lamps, in particular incandescent- or halogen retrofit lamps.


An organic light-emitting diode (10) is described, comprising a first light-emitting segment (1) and at least a second light-emitting segment (2), wherein the light-emitting segments (1, 2) are provided for emitting radiation with different brightnesses and have a common first electrode (11) and a common second electrode (12), wherein - the first electrode (11) has at least one separating line (8) which does not completely cut through the first electrode (11), - an electrical conductivity of the first electrode (11) is reduced in the region of the separating line (8), - the separating line (8) separates the first light-emitting segment (1) from the second light-emitting segment (2), and - the second light-emitting segment (2) has during operation a lesser brightness than the first light-emitting segment (1).


Patent
Osram | Date: 2017-01-10

A light emitting diode chip includes a semiconductor layer sequence having an active layer that generates electromagnetic radiation, wherein the light emitting diode chip has a radiation exit area at a front side and a mirror layer at least in regions at a rear side situated opposite the radiation exit area, a protective layer is arranged on the mirror layer, the protective layer includes a transparent conductive oxide, the mirror layer adjoins the semiconductor layer sequence at an interface situated opposite the protective layer, first and second layers, the first and second electrical connection layers face the rear side of the semiconductor layer sequence and are electrically insulated from one another, and a partial region of the second electrical connection layer extends from the rear side of the semiconductor layer sequence through at least one perforation of the active layer in a direction toward the front side.


Patent
Osram | Date: 2017-01-11

The semiconductor lamp (1) is equipped with a heat sink (2, 3) which has a first part (2) and a second part (3) connected to each other by way of a press fit and which together delimit a receptacle (10, 12) for a driver (5), the first part (2) having an insert region (8) for insertion into the second part (3), which insert region consists of spring elements (21) that can be pushed inwards. The invention is particularly useful for retrofit lamps, in particular incandescent or halogen retrofit lamps.


Patent
Osram | Date: 2017-05-24

Rotationally-symmetric lens (100) for an illumination (LED) device, said lens having an exit scattering-surface (2) and an incident surface (1) configured as a spline and comprising a central portion that is recessed towards the exit surface and a circumferential portion that protrudes in a direction away from the exit surface and encompasses the central recessed portion.

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