| Vishay Electronic Gmbh Patent applications |
| Patent application number | Title | Published |
|---|
| 20120112647 | CIRCUIT FOR A LIGHT EMITTING DIODE ASSEMBLY AND LIGHT EMITTING DIODE MODULE - A circuit for operating a light-emitting diode assembly, wherein the light-emitting diode assembly comprises a plurality of strands connected in parallel of one or more light-emitting diodes which are arranged in series and through which in the operational state a particular partial current of an operating current flowing through the light-emitting diode assembly flows, comprises a current source for providing the operating current. The circuit is designed to detect the greatest partial current and to control an operational value provided by the partial current source on the basis of said greatest partial current such that none of the partial currents exceeds a predetermined maximum current. | 05-10-2012 |
| 20120026737 | OUTDOOR LIGHTING UNIT - The invention relates to an outdoor lighting unit for lighting streets, pavements, industrial grounds, and the like, comprising one LED light source which includes several light emitting diodes in a two-dimensional array, and a housing. The housing has a single-piece solid housing element, which has at least one planar assembly section on an underside, on which a backside of the LED light source is arranged in heat-conducting connection in a planar manner. The housing element further has on said underside a circumferential wall section, which projects downwardly from the plane of the assembly section. Further, the housing element comprises an exposed cooling section on an upper side, which is convexly curved and has several cooling channels, which extend along the convex curvature. The housing element also comprises a holding portion, by means of which the lighting unit can be secured to a holding device in a self-supporting manner. | 02-02-2012 |
| 20120018623 | ILLUMINATION UNIT - An illumination unit for illuminating large surfaces comprises a carrier device ( | 01-26-2012 |
| 20110164439 | HIGH VOLTAGE CONTROLLER WITH IMPROVED MONITORING AND DIAGNOSTICS - A high voltage controller configured to drive a high voltage generator. The high voltage controller includes a voltage select input and a current select input, an actual voltage input and an actual current input. First circuitry is configured to generate an alternating current (AC) drive signal. Second circuitry configured to generate a direct current (DC) drive signal. Closed loop control circuitry is configured to adjust the DC drive signal based on at least one of the voltage select and current select inputs and at least one of the actual voltage and actual current inputs. The first circuitry may include a push-pull circuit. The second circuitry may include a pulse width modulation (PWM) controller. A high voltage generator may be coupled to the AC and DC drive signals. The high voltage generator may include a high voltage transformer having a pair of primary windings and center tap. The AC drive signal may be coupled to the primary windings and the DC drive signal may be coupled to the center tap. | 07-07-2011 |
| 20090095312 | INHALATION UNIT - The invention relates to a heating device ( | 04-16-2009 |
