-
公开(公告)号：EP1155492A1
公开(公告)日：2001-11-21
申请号：EP00993469.6
申请日：2000-12-18
IPC分类号： H02M3/337
CPC分类号： H02M7/53832 , H02M2007/4815 , H05B41/2856 , Y02B70/1441
摘要： The invention relates to a converter comprising resonant circuit elements (S1, S2) for chopping a DC voltage (U1), in which switch-on phases of the circuit elements (S1, S2) are alternating, and comprising a circuit assembly (5) with resonant circuit elements (Cr, Lr) which is used for processing the chopped DC voltage (U3) and for producing an output voltage (U2). As a type of converter load monitoring that can be changed with the least possible circuit expenditure and the least possible measuring losses, there is proposed to compare in a dead time phase (Ttot) before a circuit element is switched on the voltage (US1) or (US2) applied to the circuit element with a threshold (Uth) and ascertain from this comparison result whether an inductive or capacitive converter load is present. As a second embodiment there is proposed to determine during a dead time phase (Ttot) the derived value (dUS1/dt) of the voltage (US1) present on the circuit element and ascertain with the determined derived value (dUS1/dt) whether an inductive or capacitive converter load is present.
-
公开(公告)号：EP2460389B1
公开(公告)日：2013-05-01
申请号：EP10745008.2
申请日：2010-07-27
IPC分类号： H05B33/08
CPC分类号： H05B33/0815
-
公开(公告)号：EP2231960A1
公开(公告)日：2010-09-29
申请号：EP09700574.8
申请日：2009-01-05
CPC分类号： E04F15/02 , E04F13/08 , E04F15/02133 , E04F15/18 , E04F21/0092 , E04F2290/026 , F21V21/002 , F21V23/06 , F21V33/006 , F21Y2105/00 , F21Y2115/15 , H01R4/2404 , H01R25/145
摘要： The invention relates to an illuminated tiling system (100) which comprises back panels (10) with at least one electrically conductive layer (12, 13), plugs (20) with projections (21, 23) that electrically contact the conductive layer(s) (12, 13), and light-tiles (30) with (O)LEDs that can be fixed to the plugs. For an easy tiling, dummy-tiles can first be tiled together with conventional tiles (2) and later be replaced with the light-tiles (30).
摘要翻译： 本发明涉及一种照明的平铺系统（100），其包括具有至少一个导电层（12,13）的后面板（10），具有与所述导电层（12,13）电接触的突起（21,23）的插头（20） ）（12,13）和具有（O）LED的轻瓦（30）可以固定到插头上。 为了便于平铺，可以将瓦片（2）先用瓷砖（2）进行平铺，然后再将其替换为轻瓦（30）。
-
公开(公告)号：EP1155492B1
公开(公告)日：2004-03-17
申请号：EP00993469.6
申请日：2000-12-18
IPC分类号： H02M3/337
CPC分类号： H02M7/53832 , H02M2007/4815 , H05B41/2856 , Y02B70/1441
摘要： The invention relates to a converter comprising resonant circuit elements (S1, S2) for chopping a DC voltage (U1), in which switch-on phases of the circuit elements (S1, S2) are alternating, and comprising a circuit assembly (5) with resonant circuit elements (Cr, Lr) which is used for processing the chopped DC voltage (U3) and for producing an output voltage (U2). As a type of converter load monitoring that can be changed with the least possible circuit expenditure and the least possible measuring losses, there is proposed to compare in a dead time phase (Ttot) before a circuit element is switched on the voltage (US1) or (US2) applied to the circuit element with a threshold (Uth) and ascertain from this comparison result whether an inductive or capacitive converter load is present. As a second embodiment there is proposed to determine during a dead time phase (Ttot) the derived value (dUS1/dt) of the voltage (US1) present on the circuit element and ascertain with the determined derived value (dUS1/dt) whether an inductive or capacitive converter load is present.
-
公开(公告)号：EP2636281A1
公开(公告)日：2013-09-11
申请号：EP11781647.0
申请日：2011-10-24
发明人： CREUSEN, Martinus, Petrus , KURT, Ralph , TAO, Haimin , DEPPE, Carsten , SAUERLAENDER, Georg , DEURENBERG, Peter, Hubertus, Franciscus
CPC分类号： H05B33/0821 , G09G3/3406 , G09G2320/0666 , H05B33/0809 , H05B33/083 , H05B33/086 , H05B33/0866
摘要： The invention relates to a method and a device for driving an LED string of a first LED segment (11) and at least one further LED segment (12, 13, 14) connected in series. Each LED segment has at least one light emitting diode, LED. The LED string is powered by a rectified AC mains voltage. The first LED segment (11) is powered when the rectified AC mains voltage is above a first voltage level, and the first LED segment and the further LED segment are powered when the rectified AC mains voltage is above a second voltage level higher than the first voltage level. The first LED segment emits light having a first color temperature, and the further LED segment emits light having a second color temperature higher than the first color temperature. The light emitted by the first LED segment and the light emitted by the further LED segment are superimposed. The color temperature change of the light emitted by the LED string, when dimmed, resembles the color temperature change of an incandescent lamp.
-
6.发明公开
公开(公告)号：EP2281421A2
公开(公告)日：2011-02-09
申请号：EP09742517.7
申请日：2009-05-04
发明人： ACKERMANN, Bernd , HENTE, Dirk , MARTINY, Christoph , NIEUWLANDS, Erik , SAUERLAENDER, Georg , WENDT, Matthias
IPC分类号： H05B33/08
CPC分类号： H05B33/086 , B61L5/1881 , G09G3/3413 , G09G3/3426 , G09G2320/0242 , G09G2320/064 , G09G2320/0666 , G09G2360/147 , Y02B20/341
摘要： The present invention relates to a device and method for controlling the color point of an LED light source (50). Color point control is a most interesting product feature both for white and colored LED light sources. In known methods for the color control of RGB LED light sources use is made of flux and color sensors. However, there are difficulties with respect to sensing quickly changing ambient light, deeply dimmed colors, coordinating the measurements with the switching of the LEDs, and controlling the color in LED light units comprising a number of independent LED lamps, e.g. segmented wall washers and LCD backlights. It is proposed according to the present invention to control the color of the LED light source (50), using a model-based feed forward approach. Factors relating the parameters controlling the LED currents to the brightness for the different colors (and segments) are stored and used for open loop control. A slow-running procedure continuously measures and updates these factors. Whilst the measurements are e.g. synchronized with the PWM, the procedure itself can run considerably slower and updates the factors asynchronously.
-
公开(公告)号：EP2260676A1
公开(公告)日：2010-12-15
申请号：EP09717750.5
申请日：2009-03-02
CPC分类号： H05B33/0803 , H05B33/0821
摘要： An input stage (10) of an apparatus (1) for driving a light-emitting diode (40-42) receives a signal from a power supply (30-32), and an output stage (20) supplies a current to the light-emitting diode (40-42). The peak value divided by the average value of the current forms a ratio. The driving efficiency is improved by providing the input stage (10) with an arrangement (11) for reducing this ratio by manipulation of the signal, without the necessity of using any smoothing capacitors/inductors. The manipulation may comprise an addition of a frequency component to the signal or an adaptation of an amplitude of a frequency component of the signal. This frequency component may be a third and/or fifth and/or seventh harmonic frequency component of a fundamental frequency component of the signal. The arrangement (11) may comprise a resonant tank which may need to be tuned to the frequency component of the signal.
-
公开(公告)号：EP2474201A2
公开(公告)日：2012-07-11
申请号：EP10757276.0
申请日：2010-09-01
IPC分类号： H05B33/08
CPC分类号： H05B33/083 , Y02B20/341
摘要： In light emitting diode circuits (1) comprising serially coupled first and second circuits (11, 12) with first and second light emitting diodes, third circuits (13) are coupled in parallel with the second circuits (12) for controlling the first light emitting diodes in the first circuits (11) and/or third light emitting diodes in fourth circuits (14). This allowes more options, more optimizations, more flexibility and/or more efficiency. The light emitting diode circuit (1) receives a supply voltage from a source (2, 3) for feeding the light emitting diode circuit (1). The third circuit (13) receives a feeding voltage from the second circuit (12) for feeding the third circuit (13). The feeding voltage may be a voltage present across the second circuit (12). The third circuit (13) may further control the second light emitting diodes in the second circuit (12). Said controlling may comprise controlling a current flowing through said light emitting diodes for the purpose of dimming, flicker suppression, color control and/or temperature protection.
-
公开(公告)号：EP2127486A1
公开(公告)日：2009-12-02
申请号：EP08719451.0
申请日：2008-02-22
CPC分类号： H05B33/0803 , H05B33/0821
摘要： Driving a lighting device by a driving circuit for providing driving power for driving a lighting device, and by a decoupling unit for electrically decoupling the driving circuit from a lighting circuit. The driving power is transferred at least partially from the driving circuit to the lighting circuit, and the lighting device is arranged within the lighting circuit such that its anode is at ground potential of the driving circuit.
-
公开(公告)号：EP2460389A2
公开(公告)日：2012-06-06
申请号：EP10745008.2
申请日：2010-07-27
IPC分类号： H05B33/08
CPC分类号： H05B33/0815
摘要： Bleeder circuits (1) for combinations of phase cutting dimmers (2) and light emitting diode circuits (3) comprise active circuitry (4) to increase a number of options. The active circuitry (4) may comprise a current limiting circuit (5) for limiting a current flowing through the bleeder circuit (1). The active circuitry (4) may comprise a voltage detecting circuit (6) for activating or deactivating,in response to a detection result,the current limiting circuit (5) and may comprise control circuitry such as a micro processor circuit (7) for controlling the current limiting circuit (5) and may comprise a control circuit (9) for using information derived from a current flowing through the light emitting diode circuit (3) for controlling the current limiting circuit (5) and for controlling at least a part of the light emitting diode circuit (3) that comprises anti- parallel light emitting diodes (31-32) or serial and/or parallel light emitting diodes (33- 36).
-
-
-
-
-
-
-
-
-
搜索结果
18 条记录 (耗时 0.019 秒)
