Light-emitting diode driving

IPC classes for russian patent Light-emitting diode driving (RU 2516435):

H05B37/00 - Circuit arrangements for electric light sources in general

G05F1/56 - using semiconductor devices in series with the load as final control devices

G05F1/00 - Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems

Another patents in same IPC classes:

Lighting device / 2479165

Device comprises a light diode matrix connected via a control switch to a source of voltage of stabilised alternating current. The light diode matrix comprises one or several pairs of back-to-back connected branches from serially connected light diodes arranged on a common heat-removing substrate. The substrate is connected with an inlet of a temperature sensor, the output of which is connected to one of inlets of a control unit, which opens the control switch whenever the substrate temperature exceeds the specified level and closes it whenever temperature reduces to the specified level. Temperature is stabilised with accuracy determined by the value of discrecity of intervals n of a modulating signal. By switch opening it is possible to stop supply of voltage to light diodes and thus to reduce temperature of their heating. Due to stabilisation of light diode module substrate temperature, reliable operation of light diodes is ensured under effect of various destabilising factors.

Illumination device / 2476037

Device contains a LED unit the power leads whereof are connected to the transformer secondary winding designed in the form of a heat-eliminating plate passed inside the core. The transformer primary winding is linked to a stabilised AC power supply. The LED unit consists of several pairs of anti-parallel connected LEDs. Installed on one of the plate sides projecting outside the transformer core are the anodes of LEDs of one switching-on direction, on the other such sides - those of the other. The LEDs' cathodes are respectively connected to the anodes of the opposite direction LEDs. With a large LEDs number, several identical transformers are used. In this case the primary windings of all the transformers are connected in series while the heat-eliminating plate passed through the cores of all the transformers represents their common secondary winding 2. Implemented in the device is the possibility of installation of numerous LEDs anodes on a common plate with simultaneous provision for identical currents flowing through the LEDs and uniform heating of the surface of the heat-eliminating plate and of the product as a whole.

Light-emitting diode based illumination device with controlled light emission / 2427984

Device has a group of light-emitting diodes of different colours, including white. The disclosed device has apparatus for controlling light characteristics, a video capturing device with a camera, and apparatus for analysing and controlling light characteristics. The device also has an optical part which facilitates uniform distribution of brightness and illumination on the working surface and optimum blending of the radiation of red, blue and green light-emitting diodes. A liquid-crystal screen is used to set initial characteristics and control operating modes.

Led lamp / 2409916

Lamp includes inverter made in the form of frequency converter connected to in-series resonant circuit which consists of capacity and inductance of primary winding of resonant high-frequency step-up transformer with core or without core, high-potential output of high-voltage winding of transformer is connected to single-wire line; line includes n in-series connected primary windings of high-frequency step-down transformers (n=1, 2, 3…k); the last of primary windings is connected to natural capacity in the form of insulated conducting body, and secondary winding of each high-frequency step-down transformer is connected to bridge rectifier to the diagonal of bridge of which m light emitting diodes (m=1, 2, 3…r) are connected in series or l light emitting diodes (l=1, 2, 3…p) are connected in parallel. In the other version of LED lamp containing inverter which is made in the form of frequency converter and connected to in-series resonant circuit which consists of capacity and inductance of the first winding of resonant high-frequency step-up transformer with core or without core; high-potential output of high-voltage winding is connected by means of single-wire line to natural capacity in the form of insulated conducting body; to single-wire line there in series connected are n bridge rectifiers (n=1, 2, 3…k); to diagonal of each rectifier there connected in parallel are l light emitting diodes (l=1, 2, 3…p) or in-series m light emitting diodes (m=1, 2, 3…r), and number of m in-series connected light emitting diodes, n bridge rectifiers and l parallel connected light emitting diodes are connected to amplitude of current i_l and voltage U_l of single-wire line with the following ratios U_l > nU_br; U_mn > kU_LED; i_l > i_LED, where U_br - output voltage of bridge rectifier; U_LED - voltage of light emitting diode; i_LED - current of light emitting diode.

Method of launch and power supply of electrojet plasma engine (versions) and device for its implementation (versions) / 2366123

Invention relates to methods and devices for operation of electrojet plasma engine. Method includes closure of power supply switch and feeding of voltage from power supply for anode and cathode, closure of launching switch and creation of current by at least in one coil of electrojet plasma engine and in connected in turn into electric circuit motor of winding of electro-valves for feeding of actuating medium into anode and cathode, time delay and following breaking of launching switch, formation of high-voltage pulse between cathode and igniter electrode, and ignition of launching discharge between igniter electrode and cathode, which then initiates ignition of main discharge between anode and cathode, with feeding of voltage of its high-voltage pulse simultaneously applied between anode and cathode, and also, through blocking capacitor, between igniter electrode and cathode, and coil is additionally used in the capacity of field magnet and closure of launching switch is implemented for time of its charging, which is taken into account in time delay before disconnection of launching switcher.

Photodiode illuminator "ekon-t" / 2354084

Photodiode illuminator contains a voltage converter, diode bridge rectifier, capacitor filter and photodiode, which are placed on a printed-circuit board. The board is located inside a transparent body, made with current-carrying leads. The body is made in the form of a pipe, and the photodiodes are uniformly distributed throughout the length of the printed-circuit board. Illuminator proposed is a finished product and can be used in bodies of lamps instead of daylight lamps and incandescent lamps.

/ 2264053

/ 2259614

/ 2256305

Reference voltage source / 2514930

Device contains the first and second transistors which bases are united and connected to the device output, the first resistor, an emitter of the first resistor, a common bus, the second resistor, an emitter of the second resistor, the first output of the second resistor, the third resistor, the second output of the second resistor, a current repeater, the third transistor, a collector of the second resistor, a connection point of the first transistor collector, a base of the third transistor, a feed input of the current repeater, a power bus, a collector of the third transistor.

Device for generation of alternating current passing in load supply circuit / 2510764

Invention is attributed to the field of electric engineering and can be used for manufacturing of power supply facilities. Device contains direct voltage source, converter of direct voltage to pulse voltage connected by its inputs to outputs of direct voltage source, converter of pulse voltage to direct voltage connected by its inputs to outputs of converter of direct voltage to pulse voltage connected by its output to the first control input of converter of direct voltage to pulse voltage, direct current stabiliser connected by its first input to output of converter of pulse voltage to direct voltage and by its second input to positive output of direct voltage source, by its first output to one of load outputs and by its other output to negative output of direct voltage source; device contains control circuit connected to its first input to output of converter of pulse voltage to direct voltage by its second input to the second output of direct current stabiliser, by its first output to the second (negative) output of direct voltage source, and by its second output to the second control input of converter of pulse voltage to direct voltage.

Method to control pulse voltage stabiliser / 2509337

Voltage U_out is measured at the outlet of the stabiliser, as well as inlet voltage U_in, currents of the throttle I_L, and load l, these signals are selected in each period of conversion at certain moments of time h; the signal "capacitor current" is calculated, its dynamic component is extrapolated, and to ensure static accuracy of output voltage of the pulse voltage stabiliser, they generate a mismatch signal by voltage, and its digital summation is carried out with accumulation (they perform digital integration); the signal "capacitor current" after frequency correction and in the sum with the integrated signal of mismatch is sent to the inlet of the width-pulse modulator.

Pulsed dc voltage controller / 2505913

Pulsed dc voltage controller comprises series-connected first diode, controlled switch, filter inductance and load, two zero-diodes and filter capacitors, a microcontroller, a control driver, a feedback circuit and a manual control panel, a synchronisation unit, two inputs of which are connected to second unlike terminals of first diodes, and two outputs are respectively connected to inputs of the control driver and the microcontroller. The filter inductances are made on a common magnetic conductor and are magnetically coupled. The pulsed controller includes two additional capacitors and two second diodes. Each of the filter inductances is made with an additional lead. The leads of the additional capacitors are connected to additional leads of the filter inductances and the common terminal of the alternating current primary supply, respectively, and leads of the second diodes are connected to the additional and output leads of corresponding filter inductances.

Current control system and method of current control / 2491605

Invention suggests a current control system that contains at least one longitudinal branch with longitudinal linear controller (1, 1_1; 1₂) in order to shape a signal (u, u₁, u₂) controlling the impact; at that the longitudinal controller (1, 1₁, 1₂) is connected to semiconductive actuating element (2, 2₁, 2₂) connected to supply voltage (U_in) and referred to earthing and to which output voltage (U_out) is applied at the output side. At that reference signal is supplied to the longitudinal controller (1, 1₁, 1₂) while current-measuring signal and regulating signal (u, u₁, u₂) are referred to earthing. The regulating signal (u, u₁, u₂) is sent to the difference shaper (5, 5₁, 5₂) which subtracts difference of supply voltage (U_in) and output voltage (U_out, U_1out, U_2out) from the regulating signal (u, u₁, u₂). At that the shaped output signal from the difference shaper (5, 5₁, 5₂) is sent to semiconductive actuating element (2, 2₁, 2₂) as a corrected regulating signal (u', u'₁, u'₂).

Source of reference voltage determined through energy gap doubled width / 2488874

Device contains five transistors, three resistors and a current source which is placed between the power supply bus and the output terminal; the first and the second resistors, via their first outputs, are connected to the output terminal; the bases of the first and the second transistors are connected to the collectors of the first and the fifth transistors; the third resistor is placed between the common bus and the second transistor emitter; the emitters of the first and the third transistors are connected to the common bus; the collector of the third transistor is connected to the output terminal; the bases of the third, the fourth and the fifth transistors are connected to the collectors of the second and the fourth transistors; the emitter of the fourth transistor is connected second output of the second resistor; the emitter of the fifth transistor is connected to the second output of the first resistor.

Voltage stabiliser / 2488156

Stabiliser contains a transistor, whose collector is the input of the device, the emitter is the output of the device and the base is connected through a phototransistor to the collector and through a resistor to the emitter and the anode of a light-emitting diode which is optically connected to the phototransistor, the cathode of the light-emitting diode being connected through a stabilitron to a common wire.

Redundant voltage stabiliser based on mis transistors / 2487392

Redundant voltage stabiliser based on MIS transistors with positive outputs of each voltage stabiliser are connected through diodes at the load and source of the regulating MIS transistor through measuring resistance is connected to the stabiliser output and to the base of current-limiting n-p-n transistor while emitter of this transistor is connected to the stabiliser output and collector to the gate of regulating MIS transistor; there is an additional tripping MIS transistor with p-channel connected in-series between positive output and drain of the regulating MIS transistor, its emitter is connected to the connection point of drains of MIS transistors and its base through Zener diode and resistor connected in-series is connected to the stabiliser output; n-p-n transistor with emitter connected to the common point, the base through resistance is connected to the collector of p-n-p transistor and collector through resistor to the gate of a tripping MIS transistor; starting capacitor which is connected between the collector and emitter of n-p-n transistor; limiting resistor connected between the output of reference-voltage source and the gate of regulating MIS transistor.

Dc voltage stabiliser / 2485569

Proposed is a DC voltage stabiliser containing a regulating transistor connected via the emitter and via the collector to the input and the output pins respectively, a differential DC amplifier on two transistors, their conductivity opposed to that of the regulating transistor while their joined emitters, via the resistor, connected to the common pin, the first transistor collector, representing one of the inputs of the differential amplifier, is connected to the base of the regulating transistor and (via the resistor) to the input pin while the second transistor collector representing the other input of the differential amplifier, is connected to the output pin, its base connected to the output voltage divisor output; the base of the first transistor, representing the differential amplifier output, is connected to the output of the reference supply source consisting of a limiting resistor and a zener diode, connected in series. The limiting resistor is connected to the output pin while the zener diode is connected to the common pin; additionally envisaged is a smoothing capacitor placed in parallel to the output pins, as well as a starting capacitor placed between the regulating transistor base and collector and ensuring diode staring of the regulating transistor at the moment of input voltage supply.

Secondary of power supply source with power takeoff from phase wire of industrial frequency high-voltage power transmission line / 2483409

Proposed device comprises a primary converter, which is formed by a closed magnetic conductor, on which the secondary winding is placed, and a phase wire is pulled into the central hole of the closed magnetic conductor, at the same time winding clamps form output clamps of the primary converter, and output clamps of the secondary winding of the primary converter are connected to input clamps of the voltage converter-controller via a serially connected non-polar capacitor. A load is connected to output clamps of the converter-controller. Current flowing in a wire excites electromagnetic field in a magnetic conductor, intensity of which is determined by the ratio where I - the value of current force in the phase wire, l_av - the medium line of the closed magnetic conductor. Intensity of the magnetic field induces voltage on clamps of the secondary winding, which is proportionate to the number of turns where U - valid value of output voltage of the primary converter in the idle mode, I_av - medium line of the closed magnetic conductor, S - cross section of the magnetic conductor, k - derivative of a linear section of the main curve of magnetisation of magnetic conductor material, I_min - minimum value of current force in the phase wire.

Double-channel transceiving unit / 2515545

Invention relates to microwave antennae and can be used in the transmitting channel of a double-channel transceiving microwave unit.

Power-saving voltage stabiliser / 2514087

Disclosed is a power-saving voltage stabiliser for a three-phase electric mains, having at least one multi-purpose control single-phase air transformer, the primary coil of which is connected to a control and switching unit, and the secondary coil is connected to a load circuit; the stabiliser further includes an electric mains quality analyser with functions of a programmable logic controller with digital control outputs and capable of configuring device control functions depending on parameters of the electric mains and the switching unit.

FIELD: physics, optics.

SUBSTANCE: invention relates to a device for driving a light-emitting diode (LED), an apparatus having said device and a method of driving a LED. In the first object, the disclosed device comprises an output stage for feeding current to the LED, wherein the current has an average value and a peak value, wherein the peak value, divided by the average value, forms a ratio, and an input stage for receiving a signal from a power supply unit, wherein the input stage includes a tool, having a resonance circuit for reducing the ratio through a frequency component to the signal or adaptation of the frequency component of the signal, which improves efficiency of the LED. According to the second object, in the method on the output stage, current is fed to the LED, wherein the current has an average value and a peak value, wherein the peak value, divided by the average value, forms a ratio, and an input stage for receiving a signal from a power supply unit, wherein the input stage includes a tool, having a resonance circuit for reducing the ratio by adding a frequency component to the signal or adaptation of the amplitude of the frequency component of the signal, which improves efficiency of the LED.

EFFECT: designing a device for driving a LED with high efficiency.

13 cl, 4 dwg

The technical field

The invention relates to a device for the excitation led, the device containing the device, and to a method of excitation led.

Examples of such devices are the causative agents of LEDs, and examples of such a device are products household products and articles for professional purposes.

The level of technology

In the US 5424680 disclosed generalised frequency-dependent predistortion for nonlinear optical devices such as semiconductor lasers and LEDs. The scheme contains a prefilter and postfilter, and each filter is an integral correcting filter, which arbitrarily manipulates the phase and amplitude depending on the frequency. Each filter represents a synthesized filter, configured, or constructed in accordance with the specific complex frequency-dependent profile to enhance the linearity behavior of the nonlinear optical device.

Objective and summary of the invention

The objective of the invention is the provision of a device for the excitation LEDs with high efficiency.

Other objectives of the invention are to provide a device containing device, and method of excitation LEDs with high efficiency.

According to the first aspect provides a device for vazbu the Denia led the device includes:

- output stage to supply current to the led, and the current has an average value and a peak value, and peak value divided by the average value, form attitudes, and

- input cascade for receiving the signal from the power supply, and input cascade contains a device containing a resonant circuit, to reduce the relationship by adding a frequency component to the signal or adapt the amplitude of the frequency component of the signal, which improves the efficiency of the led.

Output stage device outputs the current to the led. This current is the average value and peak value. The peak value divided by the average value, defined as the ratio. The input stage device receives a signal from the power supply. This input cascade contains a device for reducing relationship by manipulating the signal. In other words, the device reduces the ratio by manipulating the signal. The decrease of the ratio is implemented, for example, by reducing the peak value when the average value is essentially constant. In other words, the ratio decreases, for example, by reducing the peak value when the average value is essentially constant. As a result, the led generates more light for the same average current is about compared to the excitation LEDs directly from the power supply without the use of the input stage (due to the effect of stabilizing the current modern LEDs). Thus, the led is excited with high efficiency, for example, compared with excitation almost sinusoidal current (for example, the resonant power Converter) or almost sinusoidal voltage (for example, when the excitation LEDs from the mains using the ballast resistor).

Instead excitation of a single led device can initiate two or more LEDs. These two or more LEDs can be a serial LEDs, parallel light emitting diodes or LEDs, connected partly in series and partly in parallel. The led can represent, for example, inorganic LEDs, organic LEDs or laser led, not excluding prospective LEDs.

Instead of using the ratio of the specified peak value divided by the average value, or in addition to this relationship, you can use a different ratio specified root-mean-square value divided by the average current is issued by the output stage.

The device may contain one or more podrisovani. Also, you cannot exclude one or more promising devices, each of which may contain one or more podrisovani.

In one embodiment, the implementation of whom tvline device cascades contain no smoothing smoothing capacitors and chokes. A smoothing capacitor (inductor) or a storage capacitor (inductor) DC can be used in other solutions to reduce the relationship. This capacitor (inductor) must dispose of the relatively large energy, which requires a relatively large value of the component and limits the selection of components used for expensive or bulky, or heavy, or short-lived components. An example is the use of an electrolytic capacitor as a smoothing capacitor for accumulating energy in the unbent portion (DC part) schemes. These capacitors (inductors) preferably not be used, for example, in the output stage to reduce the relations specified peak value divided by the average value, due to the fact that they create problems of durability and reliability, and/or that they increase the size and cost of the device. In addition, the use of the smoothing elements affect the characteristics of high-frequency damping LEDs (due to switching on and off of power supply in rapid succession). In the absence of cumulative elements of direct current connected to the led current and hence the brightness can respond quickly to supplied energy. It provides fast, precise damping. When cash is chii large storage elements DC connected to the led, the growth and decline of the led current is slow, which leads to deterioration of characteristics of the clearing.

A smoothing capacitor (inductor) is defined here as the capacitor (inductor), which reduces the ratio of, for example, at least 1% or, for example, at least 5% or at least 10%, not excluding other interest.

Manipulation includes adding frequency component to the signal or adaptation of the amplitude of the frequency component of the signal. The signal can be easily manipulated by the addition of one or more frequency components to the signal or add amplitude of one or more frequency components are already present in the signal. Phase or phase of one or more add-frequency components can be adjusted to the phase of the main frequency component of the signal so that the ratio of the resulting signal is reduced.

According to another variant of implementation of the device frequency component signal includes a third and/or fifth and/or seventh harmonic frequency component of the primary frequency component of the signal. The main frequency component can be, for example, 50 Hz (power grid in Europe)or 60 Hz (the power grid in the U.S.), or 10 kHz, or 100 kHz, or 1 MHz (Converter), respectively, and the learn the third (fifth, the seventh) harmonic frequency components will be 150 (250, 350) Hz, or 180 (300, 420) Hz, or 30 (50, 70) kHz, or 300 (500, 700) kHz, or 3 (5, 7) MHz, respectively. Again, the phase or phases of one or more frequency components can be adjusted to the phase of the main frequency component of the signal. Phase angle of 0° may be predominant, for example, for the third harmonic frequency component.

According to another variant implementation of the device, the amplitude of the third, or fifth, or seventh frequency component of the signal divided by the amplitude of the main frequency component of the signal, forms an additional relation that is greater than 0% and less than 100%. An additional relation is preferably greater than 5% and less than 50%, more preferably from 10% to 40%.

According to a variant implementation of the device signal is an alternating voltage. This AC voltage must be converted into the output current through the input stage and output stage.

The device contains a resonant circuit. This resonant circuit may be a managed or unmanaged circuit and may be configured to frequency components of the signal, for example, third, or fifth, or seventh harmonic frequency component of the primary frequency component of the signal.

According to another variations is the implementation of the device output stage includes a connecting circuit, and/or a transformer circuit, and/or a rectifier circuit. This termination scheme may contain one or more wires, while the transformer circuit may contain one or more coils and/or one or more transformers and rectifier circuit may contain one or more diodes or one or more transistors.

According to another variant implementation of the device, the device includes a resonant circuit, which uses reactive properties of the connecting circuit and/or transformer circuits, and/or a rectifier circuit.

Option exercise device further comprises:

- connector for connecting the input stage to the power supply of the power supply. This connector can be used, for example, to connect input stage to an electrical outlet. In this case, the signal is a sinusoidal signal, and the frequency components are added to the signal.

Another option exercise device further comprises:

Converter connected to the power supply unit to generate a signal. This Converter can be powered from the mains or battery of a particular type. In this case, the signal can be an AC rectangular waveform, and the amplitude of the frequency is omponent signal need to be adapted.

In an additional embodiment, the device Converter is a resonant Converter mode, and one or more phase angles of one or more frequency components of the signal are set so as to maintain the transducer in a resonant mode.

According to the second aspect provides a device which contains the above-mentioned device and further comprises a led connected to the output stage.

According to a third aspect provides a method of excitation led, the method comprises the steps are:

on the output stage serves current to the led, and the current has an average value and a peak value, and peak value divided by the average value, form attitudes, and

on the input stage of the signal from the power supply and add frequency component to the signal and adjust the amplitude of the frequency component by adjusting containing resonant circuit, to reduce the relationship that improves the efficiency of the led.

Embodiments of the device and of the method correspond to the implementation of the device.

The invention is based on the understanding that the led is a non-linear element, which when double log (double input current) does not demonstrate a doubling of output is a (doubling of the quantity of light). It is also based on the understanding that the ratio of the specified peak value divided by the average value of the current (the output stage), subject to reduction (input stage) by manipulating the signal coming from the power supply.

This solves the problem of providing a device for the excitation LEDs with high efficiency. This has the advantage that the efficiency of an led, and one or more other parts of the input stage and/or the output stage is increased.

These and other aspects of the invention are readily available from and will be explained with reference to the option(s) described below.

Brief description of drawings

Figure 1 - the first version of the implementation.

Figure 2 - option exercise devices.

Figure 3 - the second variant implementation of the device.

Figure 4 - influence of the third harmonic.

Description of embodiments

Figure 1 shows the first variant of implementation of the device 1 containing the input cascade of 10 and an output stage 20. Input cascade 10 includes a parallel circuit device 11 and the additional device 12. One side of this parallel circuit is connected to the first terminal of power source 30, such as a power supply of 50 Hz, and the other side of this parallel circuit is connected to the first input to the rectifier circuit 21 output the th cascade 20. The second input to the rectifier circuit 21 is connected to the second terminal of the power source 30. The first output rectifier circuit 21 is connected to the anode of the led 40, and the second output rectifier circuit 21 is connected to the cathode of the led 40. The rectifier circuit 21 includes, for example, four diodes forming a rectifier bridge.

Figure 2 shows an implementation option device 11 containing the resonant circuit in the form of a serial circuit of the inductor 51 and capacitor 52. Not excluded devices, resonant circuits, and circuits other than the sequential circuit, for example, at least partially parallel to the schema.

The device 1, shown in figure 1, excites the led 40. The output stage 20 produces a current to the led 40. This current is the average value and peak value. The peak value divided by the average value, form a relationship. Input cascade 10 receives a signal from the power source 30, for example an alternating voltage or an AC voltage, for example a voltage signal with a frequency of 50 Hz. Device 11 reduces the ratio by manipulating the signal.

Manipulation includes, for example, adding a frequency component to the signal or, for example, to adapt the amplitude of the frequency component of the signal. This frequency component signal contains, for example, third, or fifth, or ETS is my harmonic frequency component of the primary frequency component of the signal. For AC voltage, such as voltage, frequency 50 Hz main frequency component is a component of 50 Hz, and the third, or fifth, or seventh harmonic frequency component is a component 150 Hz or 250 Hz or 350 Hz. The amplitude of the third, or fifth, or seventh frequency component of the signal divided by the amplitude of the main frequency component of the signal, forms an additional relation. This additional relation, for example, greater than 0% and less than 100%, preferably ranging from 5% to 50%, more preferably from 10% to 40%.

If the power source 30 is a source for the signal voltage 50 Hz sine wave, the resonant circuit device 11 to be setup on the third (150 Hz), or fifth (250 Hz)or seventh (350 Hz) harmonic frequency component of the signal voltage with frequency of 50 Hz. In this case the additional device 12 may include, for example, a resistor. An additional relation will depend on the dimensions of the components of the devices 11 and 12.

Figure 3 shows a second variant implementation of the device 1 containing the input cascade of 10 and an output stage 20. Input cascade 10 includes a parallel circuit device 11 and the additional device 12, connected to the inverter 32. The first sign that conversions the user 32 is connected to the first terminal of the power source 31, for example (automotive) battery, and a second input of the inverter 32 is connected to the second terminal of the power source 31. One side of the parallel circuit is connected to the first output of the Converter 32, and the other side of the parallel circuit connected to the first input of the transformer circuit 22 output stage 20. Second input of the transformer circuit 22 is connected to the second output of the Converter 32. The first output of the transformer circuit 22 is connected to the anode of the led 41 and the cathode of the led 42, and the second output of the transformer circuit 22 is connected to the cathode of the led 41 and the anode of the led 42. The transformer circuit 22 contains, for example, one or more coils and/or one or more transformers.

Reactive behavior of the transformer circuit 22, in particular, the scheme of any kind, in General, can be used as part of the resonant circuit. For example, to implement part of the resonant circuit can be used parasitic inductance of the transformer.

The device 1, shown in figure 3, causes the LEDs 41 and 42. The output stage 20 produces a current on the LEDs 41 and 42. This current is the average value and peak value. The peak value divided by the average value, form a relationship. Input cascade 10 receives a signal from the power supply unit 31, 32. The power source 31 generates, for example, a constant tension is about current, and the Converter 32 converts it, for example, in an alternating square-wave signal frequency of 100 kHz. Device 11 reduces the ratio by manipulating variables rectangular signal.

Manipulation includes, for example, adding a frequency component to the signal or, for example, to adapt the amplitude of the frequency component of the signal. This frequency component signal contains, for example, third, or fifth, or seventh harmonic frequency component of the primary frequency component of the signal. For AC square-wave signal, for example a rectangular signal frequency of 100 kHz, the main frequency component is a 100 kHz component, and the third, or fifth, or seventh harmonic frequency component is a 300 kHz or 500 kHz, or 700 kHz component. The amplitude of the third, or fifth, or seventh frequency component of the signal divided by the amplitude of the main frequency component of the signal, forms an additional relation. This additional relation, for example, greater than 0% and less than 100%, preferably ranging from 5% to 50%, more preferably from 10% to 40%.

If the power supply 31, 32 is the source for the signal frequency of 100 kHz rectangular shape, the resonant circuit device 11 to be setup on the third (300 kHz) or fifth (500 kHz) or seventh (700 kHz)harmonic frequency component of this rectangular signal frequency of 100 kHz. In this case the additional device 12 may include, for example, another resonant circuit similar to the circuit device 11, but is configured on the primary frequency component (100 kHz). An additional relation will depend on the dimensions of the components of the devices 11 and 12.

This reduces the ratio by manipulating the signal. The decrease of the ratio is implemented, for example, by reducing the peak value when the average value is essentially constant. As a result, the led is excited with high efficiency. In addition, the effectiveness of one or more other parts of the input stage and/or the output stage also increases, whereas no smoothing/storage capacitors DC, no smoothing/cumulative chokes DC not used.

According to figure 1, you can use the connection scheme instead of the rectifier circuit 21, for example, when the LEDs are installed in the antiparallel configuration, as shown in figure 3. According to figure 1, you can use a transformer circuit in addition to the rectifier circuit 21. According to figure 3, you can use the connection scheme instead of the transformer circuit 22. According to figure 3 may need to add a rectifier circuit, for example, if there is only one led ilipi the chain in series and/or parallel-connected LEDs in a unidirectional connection, etc.

If additional transformer is not used in the device 1, the transformer may be present between the power source 30 or 31 and the input stage 10. If the transformer is already in use elsewhere in the device 1, additional transformer may be present between the power source 30 or 31 and the input stage 10. Input cascade 10 is the first stage in a minimum configuration, includes a device 11 for manipulating signal from the power supply to reduce the peak to average value of the current supplied to the led, and an output stage 20 is the second cascade, which, in the minimum configuration, contains wires for supplying current to the led. It is not excluded additional cascades, such as the intermediate stage.

Figure 4 shows the influence of the third harmonic on (I) efficacy (LM/W) system, (II) efficacy (lumens/watt) LEDs, (III) total flux (LM)generated by the led or LEDs and (IV) the effectiveness of the pathogen, which depend on the percentage (= additional), formed by the amplitude component 150 Hz, divided by the amplitude of the main frequency component of 50 Hz current, issued by the output stage, for a particular type of led. For this particular type of led is clearly observed on the optimum value of about 20%.

Also for this particular type of led is the ratio of the specified peak current value, issued by the output stage divided by the average value of this current can easily be reduced by about 13%, and the ratio of the specified RMS value of the current issued by the output stage divided by the average value of this current can easily be reduced by about 5%. The same is true of the current flowing through each led, and the current generated by the power supply. It is of particular interest in connection with the diagram shown in figure 3. Here we use the Converter acting as a resonant Converter. As a result, for example, the output current of the Converter is essentially zero when the switches in the Converter are subject to switch. This reduces losses during switching. This unloading of the switches present in the proposed scheme. The Converter is also able to work in a cost-effective resonant mode, and, in addition, the peak value of the output current of the Converter is reduced, which leads to additional increase the efficiency of the Converter.

In the end of the input cascade 10 of the device 1 for the excitation led 40-42 receives a signal from the power supply 30 to 32, and an output stage 20 produces a current to the led 40-42. The peak value divided by the CPE is it the current value, forms a relationship. The efficiency of excitation increases due to the supply of input stage 10 device 11 to reduce this ratio by manipulating the signal without having to use any smoothing capacitors/chokes. The manipulation may include adding frequency component to the signal or adaptation of the amplitude of the frequency component of the signal. This frequency component can be a third and/or fifth and/or seventh harmonic frequency component of the primary frequency component of the signal. The device 11 may include a resonant circuit that can be configured for the frequency component of the signal.

Although the invention has been illustrated and described in detail in the drawings and in the above description, the drawings and description should be considered in order illustrations or examples, but not limiting; the invention is not limited to the disclosed variants of implementation. For example, the invention allows an implementation option, in which different parts of the various disclosed embodiments are combined in a new version of the implementation.

Experts in the art, applying in practice the claimed invention, can understand and implement other variations of the disclosed embodiments, having examined the drawings, is accretia and claims. In the claims the use of the verb "include" and its derivatives does not exclude other elements or steps, and the use of them in the singular does not exclude the presence of their population. A single processor or other unit may fulfill the functions of several elements referred to in the claims. Only the fact that some of the measures mentioned in mutually different dependent clauses, not to say that you can not primarily use a combination of these measures. The computer program may be stored/distributed on a suitable medium such as optical disk or solid-state medium supplied together with other equipment or in its composition, but may also be distributed in other forms, for example through the Internet or other wired or wireless telecommunication systems. No legend in the claims should not be considered in order to limit its scope.

1. The device (1) for excitation LEDs (40-42), the device (1) contains
- output stage (20) for applying current to the led (40-42), and the current has an average value and a peak value, and peak value divided by the average value, form attitudes, and
- input cascade (10) for receiving the signal from the power supply unit (30, 31, 32), and the input stage (10) with the holding device (11), containing resonant circuit to reduce the relationship by adding a frequency component to the signal or adapt the amplitude of the frequency component of the signal, which improves the efficiency of the led.

2. The device (1) according to claim 1, in which cascades (10, 20) do not contain smoothing capacitors and a smoothing choke.

3. The device (1) according to claim 1, in which the frequency component signal includes a third and/or fifth and/or seventh harmonic frequency component of the primary frequency component of the signal.

4. The device (1) according to claim 3, in which the amplitude of the third and/or fifth and/or seventh frequency component of the signal divided by the amplitude of the main frequency component of the signal, forms an additional relation that is greater than 0% and less than 100%.

5. The device (1) according to claim 4, in which an additional relation is greater than 5% and less than 50%.

6. The device (1) according to claim 1, in which the signal is an alternating voltage.

7. The device (1) according to claim 1, in which the output stage (20) includes a connecting circuit and/or transformer circuit (22), and/or a rectifier circuit (21).

8. The device (1) according to claim 7, in which the device (11) includes a resonant circuit, which uses reactive properties of the connecting circuit and/or transformer circuit (22), and/or a rectifier circuit (21).

9. The device (1) according to claim 1, before omnitele containing
- connector for connecting the input stage to a power source (30) power supply(30, 31, 32).

10. The device (1) according to claim 1, additionally containing
Converter (32)connected to a power source (31) power supply unit (30, 31, 32) for generating a signal.

11. The device (1) according to claim 10, in which the Converter (32) represents the transducer resonant mode, and one or more phase angles of one or more frequency components of the signal are set so as to maintain the Converter (32) in a resonant mode.

12. The device contains a device (1) according to claim 1, the device further comprises a light emitting diode (40-42), connected to the output stage (20).

13. The pulse led (40-42), the method contains the steps that
on the output stage (20) serves current to the led (40-42), and the current has an average value and a peak value, and peak value divided by the average value, form a relationship,
on the input stage (10) take the signal from the power supply unit (30, 31, 32) and add frequency component to the signal and adjust the amplitude of the frequency component by adjusting (11)containing a resonant circuit, to reduce the relationship that improves the efficiency of the led.