Tridonic Optoelectronics Gmbh

Tridonic Jennersdorf Gmbh

Ledon Lighting Jennersdorf Gmbh

At&s Austria Technologie & Systemtechnik Aktiengesellschaft

Tridonic Gmbh Co. Kg

Lumitech Produktion Und Entwicklung Gmbh

Lumitech Patentverwertung Gmbh

Tridonic Connection Technology Gmbh & Co Kg

Hans Hoschopf

Stefan Tasch

Peter Pachler

Paul Hartmann

Detlef Starick

Istvan Peter Bakk

Wolfgang Kempfert

Sylke Rösler

Sven Rösler

Ferdinand Lutschounig

Stefan Gianordoli

Janos Dobos

Adam Horvath

Franz-Peter Wenzl

Jürgen Kreuzbichler

Thomas Leitgeb

Franz Schrank

Istvan Bakk

Franz Zerobin

Eva Maria Volkheimer

Werner Hlina

The invention relates to a method for operating a range of LEDs preferably fed with constant current, which range of LEDs preferably generates white mixed light with at least two LED types of different spectrum, wherein the movement of the color locus of the mixed light, which is caused by the different negative gradients of the temperature dependencies of the intensity of at least two different LED types, is reduced by circuitry without using measurements and feedback variables.

Method and circuit arrangement for producing mixed LED light of a predetermined color

A retrofit light emitting diode (LED) module may include a carrier with at least one LED, a retrofit connection for mechanical and electrical contact-connection to conventional lamp holders, and an electronic system for driving the at least one LED. At least one part of the electronic system is integrated into the carrier, and the electronic system comprises a sensor system. A retrofit LED module system may include at least two retrofit LED modules and at least one control unit which regulates the retrofit LED modules in an adaptive and synchronized manner.

Integrated LED and sensor device

The invention relates to a light-emitting arrangement, having:&#x2014;at least one light-emitting diode chip (),&#x2014;a multi-layer board () having a base () of a thermally well conducting material, in particular of metal, and&#x2014;an electrical insulating and thermally conducting connection layer () between the emission surface of the light-diode chip () and the board ().

Light-emitting diode arrangement with heat dissipating plate

A method for operating a controlled illumination apparatus, the illumination apparatus comprising at least one pulse-width modulation (PWM)-controlled LED, the method comprising carrying out a duty cycle sweep of the PWM signal driving the LED while sensing at least one parameter indicative of the power consumption of the LED to compute a curve reflecting the duty-cycle dependency of the power efficiency of the LED.

Microcontroller-optimized pulse-width modulation (PWM) drive of a light-emitting diode (LED)

A lighting system () comprises a plurality of light units (), each light unit () including a photo sensor (), a light source () and a control unit () adapted to operate the light source () and to modulate the light emitted by the light source () so as to transmit data, wherein the light units () are arranged according to a ring topology.

LED lighting system with optical communication functionality

An LED spotlight has an arrangement having at least one LED, above which there is arranged a color conversion substance, and an optical system of a substantially transparent material, which directs incident light from the LED arrangement in the direction of an exit surface by means of total internal reflection. The base surface of the conical optical system may thereby have the shape of a polygon. The outer wall of the conical optical system may have at least in partial regions planar facets. The color conversion material may be provided in the shape of a cuboid above the LED arrangement.

LED spotlight having a funnel-shaped lens

The invention relates to a light emitting device having a radiation emitting element, for example a light emitting diode, and a luminescent material which is able to absorb a part of the radiation sent out by the radiation emitting element and to send out light with a wavelength which is different from the wavelength of the absorbed radiation. The device further has diffusing particles which are able to scatter a part of the radiation sent out by the radiation emitting element, and/or to scatter a part of the light sent out by the luminescent material. The diffusing particles are of non-activated luminescent material, through which production is simplified.

Light emitting device with a non-activated luminescent material

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Jennersdorf, Austria

Hans Hoschopf