Led lamp driver and method

FIELD: electricity.

SUBSTANCE: invention is related to illumination systems based on light-emitting diodes (LED). LED lamp driver receives direct-current power of low voltage, at that the LED driver includes the following components: push-pull transformer circuit connected to receive direct-current power of low voltage and to generate alternating-current energy by the transformer, at that the push-pull transformer circuit contains switches reacting to control signals; self-resonant control circuit connected to the push-pull transformer circuit in order to generate control signals; current controller coupled to receive alternating-current energy of the transformer and to generate alternating-current controlled energy; AC/DC converter coupled to receive alternating-current controlled energy and to generate direct-current energy of high voltage.

EFFECT: provision of LED overheating protection and efficiency increase.

21 cl, 4 dwg

 

The technical field

The present invention relates in General to lighting systems based on LEDs and the power supply, and in particular to the circuit power supply for led lamps.

Prior art

Today, digital lighting technology, i.e. lighting, based on semiconductor light sources, such as LEDs, are a viable alternative to traditional fluorescent lamps, microwave lamps and incandescent lamps. Recent advances in the technology associated with them, combined with the many advantages of these technologies, such as high level of energy conversion and optical efficiency, durability, low maintenance, has led to the development of efficient and reliable light sources of a wide range with a variety of lighting effects. New high-performance, energy-efficient and miniature led lights combine the durability and reliability of traditional LEDs and higher brightness, which makes them convenient, in particular for General lighting.

Light emitting diodes (LED) are widely used in systems emergency lighting due to damage of the main artificial lighting caused by power interruption. The light source for barinaga lighting can be powered device supply power for emergency lighting, using energy from rechargeable batteries, power units, specially protected networks or other types of replaceable energy sources. In accordance with the safety Regulations of the National fire protection Association (101, sections 5-9) For emergency lighting escape routes... required to provide emergency lighting for escape routes in case of failure of normal lighting.

Power supply LEDs, called in this document "drivers of led lights differ from power sources, called ballast resistances and used to power a gas-discharge lamps such as fluorescent lamps. The ballast resistor perform many functions, including the ignition of a discharge lamp pulse of high voltage, current limiting lamp, because these lamps have a volt-ampere characteristic with a negative slope, and the power lamp the required current and voltage. LEDs work differently: there is no need for the ignition pulse of high voltage and full voltage on the filament LEDs is considerably less than that of the fluorescent lamp of the same brightness level. Whatever the drivers, led lamps must provide current limiting and in some degree to perform the management is of the current.

Control of the led current includes two tasks: (1) the current limit in order to prevent heat damage and (2) the current control to maintain the led current within a certain range. Heat damage may occur due to the high temperature of the led. The current passing through the led leads to the temperature increase of the led that allows you to skip through the led more current, which further increases the temperature. The current limitation is necessary to prevent heat damage and output LEDs fail due to overheating. The current regulation is necessary to take into account the variability of the led and the input ripple voltage driver led bulbs.

Many traditional approaches to control and current control are inefficient, complicated, unreliable and/or expensive. One approach is to combine passive serial impedance such as a resistor, in series with a matrix of LEDs. This approach is simple, but inefficient, since the resistor dissipates energy as heat. Another approach is the use of active sequential linear element such as transistor, together with feedback. In this approach, applied linear current regulators, to the which, along with the that are complex, advanced inefficient and expensive. Another approach is to use pulse controllers that can use the feedback they are relatively efficient, but complex, expensive and unreliable.

Drivers using led lamps for emergency lighting can lead to additional problems. In emergency condition input voltage driver led lamps are often provided with auxiliary voltage source or a source of low voltage, such as battery or low voltage redundant power supply. Whatever it was, the driver led lamp should produce a constant current, sufficient to supply the serial number of the LEDs, even though the input voltage driver led bulbs are limited to low voltage. Input voltage must be raised to a voltage sufficient to power the LEDs.

One approach to creating a driver circuit led lamp was using topology line scan. Unfortunately, the topology of the line scan has several disadvantages. First, the topology of the line scan includes only one active switching element and therefore uses only one magnetic core of the transformer line is the TCI in the same quadrant. Secondly, the topology of the line scan works in such a way that the primary winding and secondary windings conduct current during alternate phases. During the first phase of the primary winding conducts current, while the secondary winding is not, resulting in a magnetic field of the output transformer of the horizontal energy is stored. During the second phase of this stored energy is transferred to the secondary side through the transformer core, which causes a current in the secondary winding, while in the primary does not. At the same time primary and secondary winding current does not hold. Thus, the topology of the line scan cannot be samaritane scheme and should include other means to control the switching frequency. Thirdly, the current flowing in the secondary winding topology, line scan, is intermittent, which narrows the possibilities and limitations of the current control.

Another approach to creating driver led lamp was to use pulse-width modulation (PWM) using feedback to measure current matrix LEDs and an active current control matrix of LEDs. Despite its effectiveness, this approach is costly for many applications. Thus, it is desirable to provide the et driver led lamp and method which would have been accounted for at least some of the above disadvantages.

A brief statement of the substance of the invention

Accordingly, one aspect of the present invention in General is directed to the driver led lamp powered DC low voltage and includes a diagram of push-pull transformer, operatively connected to receive power DC low voltage and energy AC transformer, and circuit push-pull transformer contains switches that respond to control signals; samaritano control circuit connected with a circuit of push-pull transformer, for generating control signals; a current controller, operatively connected to receive AC energy transformer and generate a controlled AC energy; and the Converter AC to DC, promptly connected to receive a managed AC energy and energy DC high voltage.

Another aspect of the present invention mainly aims at camerasony driver led lamp that includes a push-pull transformer, which has a first primary winding, a second primary winding, the winding back of St. the Z. connected to the first primary winding and the second primary winding and a secondary winding connected to the first primary winding and the second primary winding;

the first switch, responsive to a first control signal from the first end of the feedback winding;

a second switch, responsive to the second control signal from the second end of the feedback winding, and the first control signal and second control signal are made to connect the circuit of the first switch and the second switch alternately;

the current controller, operatively connected with the secondary winding; and

Converter AC to DC, operatively coupled to the controller circuit;

when this current flows through the first primary winding in the first direction when the first switch is closed, and the second primary winding in the opposite direction relative to the first direction, when the second switch is closed.

Another aspect of the present invention considers the way power led lamps energy direct current, low voltage, and the method comprises steps in which: provide a transformer which has a first primary winding, a second primary winding and a secondary winding connected to the first primary is winding and the second primary winding; get energy DC low voltage using a transformer; set Samaritans control for alternately switching the current between the first primary winding and the second primary winding and generates energy alternating current transformer secondary winding; energy-driven AC transformer to obtain a controlled AC energy; and convert the managed energy AC in energy DC high voltage.

The above and other features and advantages of this invention will become clearer from the following detailed description of preferred embodiments, are given together with the accompanying drawings. The detailed description and the drawings are purely illustrative and do not limit the scope of the invention defined by the attached claims and their equivalents.

Under used in this document, disclosure of the nature of the present invention, the term "led" should be understood as any electroluminescent diode or other type of system based on the injection/incorporation of charge carriers, which are able to emit radiation under the action of an electrical signal. Thus, the term "led" includes (but is not limited to) various popup vodnikova patterns, which emit light in response to current, light emitting polymers, organic LEDs (OLED), electroluminescent strips, and the like. In particular, the term led refers to light emitting diodes of all types (including semiconductor LEDs and organic LEDs (OLED), which can be configured to emit one or more of the ranges: infrared spectrum, ultraviolet spectrum, and different parts of the visible range of the spectrum (usually including the wavelengths of radiation from about 400 nm to 700 nm). Some examples of LEDs include (but are not limited to) various types of infrared LEDs, ultraviolet LEDs, red LEDs, blue LEDs, green LEDs and white LEDs (considered further below). It should be borne in mind that the LEDs can be configured and/or controlled) with the ability to emit radiation with different bandwidth (for example, full width at half maximum or duration at half amplitude) for the given range of the spectrum (for example, narrow band, wide band) and with a variety of dominant wavelengths, determining the primary color tone.

For example, one implementation of an led is made with a chance to view the Yu generate almost pure white color (for example, white led), can contain multiple crystals, radiating, respectively, in different ranges of the spectrum of electroluminescence that mixing allows to obtain almost pure white light. In another implementation, the led white light may be associated with a phosphor material that converts the first spectrum of electroluminescence in a different second range. In one example of such an implementation, the electroluminescence with a relatively short wavelength and a narrow band spectrum "pumps" phosphor material, which in turn emits light with a longer wavelength in a wider range of the spectrum.

It should be understood that the term "led" does not limit physical and/or electrical design type led. For example, as noted above, the led may be called a separate light-emitting device with many crystals that are configured to radiate in different ranges of the spectrum (for example, which can (or cannot) be managed separately). In addition to the LEDs may include a phosphor, which is considered an integral part of the led (for example, some types of white LEDs). In General, the term "led" may be called hull LEDs without LEDs, the LEDs are surface mounted, led the water with open frame mounting crystals, the LEDs in the T-shaped housing, led housing in the form of a star, the LEDs with power supply, LEDs, shell element and/or optical element (e.g., with the diffusion lens), etc.

In the drawings, the same reference position in the main relate to the same elements in different species. Additionally there is no need to change the scale of the drawings, as the emphasis is placed on illustrating the principles of the invention, which is not the case.

Brief description of drawings

The invention is further explained in the description of the preferred variants of the embodiment with reference to the accompanying drawings, in which:

Figure 1-2 represent respectively a block diagram and schematic diagram of the driver led lamp in accordance with some variations of the embodiment of the present invention;

Figure 3 depicts a schematic diagram of the surge protection for the driver of the led lamp shown in Figure 1-2; and

Figure 4 depicts a block diagram of the sequence of operations of way power led lamps DC low voltage in accordance with various embodiments of the present invention.

A detailed description of the preferred embodiment variants of the invention

Referring to Figure 1, the driver 20 led bulb receives energy 23 constant is th low voltage from the source 22 of direct current and produces on the conclusions 32 DC energy 31 DC high voltage for the matrix 34 LEDs. As defined in this document, low voltage and high voltage are relative concepts related to the supply voltage constant current driver 20 led bulbs, and not to the absolute value of the voltage: the supply voltage 23 DC low voltage source 22 of direct current is lower than the supply voltage 31 DC high voltage on the conclusions 32 DC required to power the matrix 34 LEDs. For matrix 34 of LEDs required energy DC.

The driver 20 of the led lamp includes a circuit 24 push-pull transformer, operatively enabled to generate energy 23 DC low voltage from the source 22 of direct current energy generation 27 AC transformer; samaritano circuit 26 of the control operatively connected to the circuit 24 push-pull transformer, for generating control signals 35; the controller 28 current operatively enabled to generate energy 27 AC transformer and managed production of energy 29 alternating current; and a Converter 30 AC to DC, operatively enabled to receive a managed energy 29 AC and energy 31 DC high the voltage on the conclusions 32 DC.

The driver 20 led bulb uses a scheme 24 push-pull transformer to increase the voltage received from the source 22 of direct current low voltage to a level sufficient to actuate the serial number of LEDs in the matrix 34 LEDs. Scheme 24 push-pull transformer is inexpensive, simple and effective means for increasing the voltage received from the source 22 of direct current low voltage. This scheme 24 push-pull transformer can be called a Converter or inverter, because it converts the energy of 23 DC low voltage source 22 of direct current on the primary side circuit 24 push-pull transformer in energy 27 AC transformer on the secondary side of the circuit 24 push-pull transformer. The voltage at the secondary side circuit 24 push-pull transformer is approximately equal to the sum of the voltage controller 28 DC Converter 30 AC to DC and the matrix 34 LEDs.

The controller 28 receives current energy 27 Eremenko current transformer and transmits the managed energy 29 AC. In one embodiment, the implement controller 28 current is a current-limiting capacitor serially connected to the matrix 34 LEDs. The current flowing through the capacitor is variable and therefore has to balance the charge of the capacitor. Therefore, the output current of the capacitor is variable. The Converter 30 AC to DC converts a managed energy 29 AC energy 31 DC high voltage, which can be used to power the matrix 34 LEDs.

The source 22 of direct current may be a battery or other source of direct current low voltage. Voltage source 22 of direct current is below the voltage required to power the matrix 34 LEDs, includes a series of LEDs on the conclusions 32 DC. When the source 22 of direct current is a battery, operatively enabled with the possibility of energy production 23 DC low voltage, and matrix 34 LEDs operatively enabled to generate energy 31 DC high voltage driver 20 led bulbs can be used as a separate light source for emergency lighting.

Scheme 24 push-pull transformer is the BOJ switch 25 for switching the current direction, flowing through the circuit 24 push-pull transformer. In one embodiment, the implementation of the scheme 24 push-pull transformer includes two switches, each of which alternately transmits approximately 50% of the period T, which is equal to the reciprocal of the switching frequency. One of the switch passes current through the first primary winding circuit 24 push-pull transformer in order to initiate the magnetic flux of the core in one direction and the other switch ignores other pollperiod current through the second primary winding 24 of the push-pull transformer, initiating the magnetic flux of the core in the other direction. This push-pull topology is highly useful uses magnetic permeability of the transformer. Also push-pull topology operates in samaritanism mode, because the primary and secondary winding circuits 24 push-pull transformer conduct current simultaneously. Work in samaritanism mode allows the use of simple, economical and efficient samaritano circuit 26 controls. Samaritana circuit 26 controls can be either internal or external to the circuit 24 push-pull transformer.

Samaritana circuit 26 controls provides control signals to the switches 25 to initiate position the positive feedback and the establishment of generation with positive feedback. The switching frequency is calculated as f=(1/(2π√LC)), where L and C are respectively the total inductance and capacitance of the circuit, which is determined mainly by the circuit of the secondary winding and to a lesser extent includes the total inductance and capacitance of the secondary winding of the transformer. The frequency option you can choose in order to facilitate the choice of the inductor value and size of the inductor, the size and structure of the transformer and the capacity and size of the capacitor needed for the transfer matrix of LEDs sufficient quantities of voltage and current from a range of values of the voltages of the battery with regard to performance and cost. The parameter values of the elements samaritane circuit 26 controls and other parameters of the driver elements led lamp is chosen so as to provide switching at a high frequency, which promotes the use of compact and efficient inductors and transformers. Switching at high frequency also allows you to use the controller 28 current small, inexpensive capacitors.

The current control is performed by the controller 28 power method passive serial impedance using a simple capacitor, then soedinenie matrix 34 LEDs. This ensures adequate for emergency lighting control and current control. Converter 30 AC to DC can be any rectifier, such as diode full-wave bridge rectifier.

2 in which like elements in figure 1 have the same reference position, depicts a schematic diagram of the driver led lamp in accordance with various embodiments of the present invention. The driver led bulb contains a diagram of the push-pull transformer, i.e. the circuit containing the transformer, which operates in push pull topology. Winding feedback push-pull transformer connected to each of two switches push-pull transformer for transmission switches of the two control signals. Samaritana control circuit including a feedback winding, performs a function that is implemented by the circuit positive (generation with positive feedback) feedback, and thus, the driver led bulb works in samaritanism mode.

Scheme 24 push-pull transformer contains a push-pull transformer T1, a switching transistor Q1, the switching transistor Q2, the resistor power base RB and feeding the inductor Lfeed. In this embodiment, the wasp is estline scheme 24 push-pull transformer additionally includes additional primary capacitor CP and an auxiliary capacitor CS. Samaritana scheme 26 control includes a feedback winding FB transformer and resistor power base RB. Element 28 of the control current is of the ballast capacitor CB. The Converter 30 AC to DC includes diodes D1, D2, D3, and D4 form a full-wave rectifier, which may be made of the individual diodes or may be in the form of an Assembly of integrated circuit (IC). The input terminals DC+ and DC - are connected with the corresponding terminals "+" and "-" power supply DC low voltage, for example a battery or other DC source. The driver 20 of the led lamp may further comprise a filter capacitor Cout connected to the leads 32 DC, and/or the protective diode Dout as schema 36 surge protector connected to the leads 32 DC.

Push-pull transformer T1 has a first primary winding Pri1, the second primary winding Pri2, the feedback winding FB connected to the first primary winding Pri1 and the second primary winding Pri2, and the secondary winding of the Sec, connected to the first primary winding Pri1 and the second primary winding Pri2. Switching transistor (switch) Q1 responds to the control signal coming from one end of the feedback winding FB, and a switching transistor (switching the tel) Q2 responds to the control signal, coming from the other end of the feedback winding FB. The control signals have the opportunity to snap one switching transistor (switch) Q1 alternately with the other switching transistor (switch) Q2. When one switching transistor (switch) Q1 is closed, current flows through the first primary winding Pri1 in the first direction, and when the other switching transistor (switch) Q2 is closed, current flows through the second primary winding Pri2 in the second direction. With an average point ct, is located between the first primary winding Pri1 and the second primary winding Pri2, there will be one path passing from the clamp DC+ DC to the middle point ct, through the first primary winding Pri1, through the switching transistor (switch) Q1 to the input clamp DC-when switching transistor (switch) Q1 is closed, and another circuit extends from the clamp DC+ DC to the middle point ct, through the second primary winding Pri2, through the switching transistor (switch) Q2 to the input clamp DC-when switching transistor (switch) Q2 is closed. When the battery is connected to the output terminals DC+ and DC - energy 23 DC low voltage, and matrix 34 LEDs included with the possibility obtained the I energy 31 DC high voltage, the driver led lamp 20 can be used as a separate light source for emergency lighting.

Supply inductor Lfeed is an inductor connected between the input clamp DC+ and average point ct first and second primary windings Pri1 and Pri2, while the input clamp DC - connected emitters of both switching transistors Q1 and Q2 forming the path of the return current to the switching transistors Q1 and Q2. Supply inductor Lfeed delivers the energy source to the coils Pri1 and Pri2 push-pull transformer T1. The primary winding Pri1 and Pri2 transformer are essentially identical and are connected to the middle point of the ct phase. The inductance of the power inductor Lfeed choose to provide the average current of the primary windings Pri1 and Pri2 so that the magnitude of the ripple current double amplitude flowing through the primary windings Pri1 and Pri2, had a valid value. When the inductor will be current, the average current will prevent a sharp change of direction. Consequently, in a short switching periods T=1/f supply inductor Lfeed is used for the primary windings Pri1 and Pri2 source of DC current values. Specialists in the art should be understood that the inductance of the supply coil is inductively Lfeed can take any value, including zero, depending on the particular application.

The primary winding Pri1 and Pri2 electrically connected to the collectors of switching transistors Q1 and Q2, respectively. The switching transistors Q1 and Q2 are active solid-state switches that allow current alternately through the first and second primary winding Pri1 and Pri2 respectively. The switching transistors Q1 and Q2 responsive to control signals received from opposite ends of the feedback winding FB transformer. Additional primary capacitor CP can perform for transistors Q1 and Q2 additional filtering noise coming from the primary windings Pri1 and Pri2 transformer T1. Two phase alternating transmission of half cycles of current in primary winding Pri1 and Pri2 create in the secondary winding Sec of the transformer continuous AC current full period. The feedback winding FB transformer is connected with the bases of the transistors Q1 and Q2 and the corresponding phase delivers the control signals to the transistors Q1 and Q2 to initiate a positive feedback and establishing generation with positive feedback. Resistor power base RB delivers the required base current of the switching transistors Q1 and Q2 to fully saturate the switching transistors Q1 and Q2, when each of the switching transistors Q1 and Q2 alternately PR is putting forth the current.

The ratio of turns of the secondary winding Sec of the transformer and the first primary winding Pri1 transformer affects the magnitude of the potential appearing at the secondary winding Sec of the transformer. AC voltage on the secondary winding Sec of the transformer may be installed on additional capacitor CS, which is an auxiliary capacitor is used to (1) filter out noise in the transition mode and off mode load, (2) serves as an additional design parameter contributing to the setting of the resonance frequency f, and (3) prevents the state from the care of high frequency or conditions unforeseen fluctuations, performing the function of the load on the secondary winding Sec of the transformer if the process will have a gap on the conclusions 32 DC parallel matrix 34 LEDs.

The ballast capacitor CB plays the role connected in series element 28 of the control current for the matrix 34 LEDs. The ballast capacitor CB has three main functions, which are integral to the operation of this samaritane control circuits: (1) performs the restriction of AC to prevent thermal failure of the matrix 34 LEDs, (2) performs the current control matrix 34 LEDs, as there are variations of the parameters of the matrix 34 SV is todito, and (3) provides the basic capacity needed samaritane scheme for the implementation of the excitation function.

The ballast capacitor CB plays the role of impedance for AC power transformer in order to limit to the desired calculated value-driven energy of the alternating current flowing in the Converter 30 AC to DC current, and thus limit the energy DC high voltage applied to the matrix 34 LEDs. The value of the capacitance of the ballast capacitor CB are chosen so that the DC power supply high voltage coming into the matrix 34 LEDs, could be limited and well adjusted to a constant voltage DC power to low voltage, despite the large variation in voltage of the led. The ballast capacitor CB may be a high-quality capacitor, which is almost never dissipates energy due to the consistent resistance of the capacitor. Capacitors include capacitors with high dielectric such as plastic or ceramic dielectrics.

The ballast capacitor CB is connected on the alternating current with the circuit a full-wave rectifier containing the diodes D1, D2, D3 and D4. This scheme rectifier connected thus the om, the diodes D1 and D3 skip pollperiod AC, and diodes D2 and D4 are not directly offset transition and therefore do not pass current. On the other hand, when the diodes D2 and D4 skip pollperiod AC, diodes D1 and D3 are not directly offset transition and therefore do not pass current. It results in a constant current to power the matrix 34 LEDs, which meets the requirements of the food matrix 34 LEDs. The filter capacitor Cout is an additional filter capacitor for smoothing the DC output current and reduce the pulsating components of the AC current flowing through the matrix 34 LEDs.

Additional protective diode Dout is a diagram 36 surge protection for: (1) protection of the matrix 34 LEDs from high voltage, spontaneously generated by the Converter 30 AC to DC current, and (2) protection diodes D1, D2, D3 and D4 from unacceptably high voltage when the high voltage on the matrix 34 LEDs is induced by external sources. High voltages may occur in the case of opening the kennel, parallel conclusions 32 DC, when in the matrix 34 LEDs there is a gap, when there is a gap in the connection of the driver 20 led bulbs and matrix 34 LEDs, or in the case when the matrix 34 LEDs is Neispravna. Additional protective diode Dout may be a Zener diode or a Zener diode with a suppressor transient voltage (PNN). In one example, if the load led is designed to work with 15 V (DC) in the emergency mode, and the maximum forward voltage is equal to 21 (DC)to prevent overvoltage is possible to apply the protective diode Dout in the 18th Century, the Converter 30 AC in DC will continue to apply the current to the protective diode Dout, causing the dissipation of the energy, and therefore heat. If the load led is designed to operate at a current of 300 mA (DC), in emergency mode, and uses 18-volt Zener diode, Zener diode must be rated at least 5.4 watts. In a Zener diode may be one or more heat sinks to dissipate the heat. Experts in the art should understand that in case of need it is possible to do without a schema 36 surge protection. Output terminals DC Out+, Out - connected respectively with the terminals "+" and "-" matrix 34 LEDs. Specialists in the art it should be clear that the circuit in Figure 2 is exemplary and for specific applications can be created in a different schema.

3, in which the elements matching the elements of figures 1 and 2, have the same reference position, depicts a schematic diagram of the surge protection for the driver led lamps. In one variation of the embodiment to limit the voltage and/or fixing the preset voltage level in a state of overvoltage in the circuit protection overvoltage is applied controlled silicon diode (VHF). Scheme 40 surge protection provides controlled silicon diode SCR1 42, connected in parallel with the matrix 34 LEDs through the conclusions 32 DC. Scheme 40 surge protection additionally includes a trigger circuit 44 VHF connected to the gate controlled silicon diode SCR 42. Start-up circuit 44 VHF contains diode Z1, resistor Rz, a resistor Rg and a capacitor Cg. Diode Z1, which may be a Zener diode, dynistor etc. are sequentially connected to the resistor Rz and parallel with the controlled silicon diode SCR1 42. The resistor Rg connected between the connection point of diode Z1 and resistor Rz and gate controlled silicon diode SCR1 42. The capacitor Cg connected between the gate controlled silicon diode SCR1 42 and the cathode of the controlled silicon diode SCR1 42.

In normal operation, the current flows through the matrix 34 LEDs. Diode Dout2 ensures the correct direction of current flow through the matrix 34 LEDs. Controlled silicon diode SCR1 42 the power is, and it is only leakage current. In addition to the anode and cathode, available in a normal diode, VHF contains a shutter to control the threshold current flowing from the anode to the cathode. In a failed state start-up circuit 44 VHF applies the voltage to the gate controlled silicon diode SCR1 42 in order to enable controlled silicon diode SCR1 42 to pass current. The resistor Rg and a capacitor Cg start-up scheme 44 VHF provide a time delay for starting voltage for preventing a false alarm. The current flows through the silicon controlled diode SCR1 42, and not through the matrix 34 LEDs that protects the matrix 34 LEDs from overcurrent. When the controlled silicon diode SCR1 42 is enabled, current flows through it up until the current flowing from the anode to the cathode, more holding current, so there is no need to maintain the current through the diode Z1, required to enable the controlled silicon diode SCR1 42. As soon as the current passing from the anode to the cathode) becomes less than the holding current, controlled silicon diode SCR1 42 ceases to conduct current and resumes normal operation.

The parameter values of the various circuit elements 40 surge protection are selected as required for the particular application. In one example, the nominal working voltage is agenie on the conclusions 32 DC the reported matrix 34 LEDs, equal to 15 V (DC), and the maximum forward voltage is equal to 21 (DC). Rated current flowing through the matrix 34 LEDs, equal to 300 mA (DC), so controlled silicon diode SCR1 42 may be VHF, up to 500 mA (DC), otherwise controlled silicon diode SCR1 42 will not sustain a short circuit current. The value of the diode Z1 is chosen so that it was possible to run controlled silicon diode SCR1 42 until the voltage matrix 34 LEDs will reach the critical value. If the conclusions 32 DC matrix 34 LEDs are designed for a rated voltage of 15 V (DC) and on the most direct voltage equal to 21 (DC)diode Z1 may be a Zener diode with a breakdown voltage equal to the 18th Century, the resistance Value of the resistor Rz is chosen to provide the necessary current flowing through the diode Z1, in the event of breakdown of overvoltage. If the overvoltage condition to the resistor Rz is applied 2 to enable the controlled silicon diode SCR1 42, and the current which must pass through the diode Z1 is equal to 20 mA, the resistor Rz can be chosen equal to 100 Ohms. Resistance values of the resistor Rg and a capacitor Cg start-up scheme 44 VHF chosen the button to provide a time constant, required to enable the controlled silicon diode SCR1 42, and to avoid false positives. If, for example, the resistor Rg is chosen equal to 1000 Ohms, and the capacitor Cg is equal to 0.1 μf, the time constant trigger circuit 44 VHF equal to 100 μs. Experts in the art should understand that the values of the parameters for diode Z1, resistor Rg and a capacitor Cg should be selected to ensure the operation of the circuit 40 surge protection only during a fault condition.

Figure 4 depicts a block diagram of a method of power led bulb energy DC low voltage according to different variants of implementation of the present invention. The method 100 includes the steps, which provide a transformer 102, which has a first primary winding, a second primary winding and a secondary winding connected to the first primary winding and the second primary winding; 104 receive energy DC low voltage transformer; set 106 Samaritans control for alternately switching the current between the first primary winding and the second primary winding, and the energy of the alternating current transformer secondary winding; and a control 108 energy AC transformer to obtain a controlled energy is Eremenko current; convert 110-driven energy AC in energy DC high voltage. The method 100 may further comprise a stage at which prevent the overvoltage from power DC high voltage, filtered interference on the first primary winding and the second primary winding and/or interference filter on the secondary side.

Although in this document were reviewed and illustrated several embodiments of the invention, specialists in the art can easily imagine a variety of other means and/or structures for performing the functions and/or results and/or one or more of the advantages discussed in this document, and each of such variations and/or modifications must conform to the scope of embodiments of the invention discussed in this document. More generally, specialists in the art without work should understand that all parameters, dimensions, materials and configurations described herein are exemplary, and the actual parameters, materials and/or configurations will depend upon the particular application or applications that use the idea of the invention. Experts in the art should recognize and Ubud is sterile, after no more than one of the planned experiment, the existence of many equivalents of the specific variant implementation of the invention described in this document.

Therefore, it should be clear that the above embodiments of presents only examples and that in practice it is possible to apply the embodiments of the invention except as required by the specific description and the claims, without departing from scope of the attached claims and its equivalents. Embodiments of the invention in accordance with the essence of the present invention is directed to each feature, system, product, equipment and/or method, described herein. In addition, we note that any combination of two or more such features, systems, products, equipment and/or methods, if such features, systems, products, equipment and/or processes are mutually independent, can be included in the scope of the invention in accordance with the essence of the present invention.

It should also be understood that unless otherwise expressly stated in any statement in this document ways that contain one or more of the steps or actions, the order of the steps or actions should not necessarily be limited to the order in which lists the steps or on istia this method.

In the claims, as well as in the above description, all intermediate expressions such as "comprising", "includes", "having" etc. should be understood as open, i.e. they mean including but not limited to these. Only intermediate expression "consisting of" and "mainly comprising" will be closed and semi-closed intermediate expressions, respectively.

1. The driver led lamp powered DC low voltage, comprising:
the scheme (24) push-pull transformer connected to receive energy (23) DC low voltage and configured to strengthen the capacity of DC low voltage generation with positive feedback, and energy (27), AC transformer, and a circuit (24) push-pull transformer contains switches (25), which respond to control signals (35);
samaritano scheme (26) control connected with the scheme (24) push-pull transformer, for generating control signals (35) and the establishment of generation with positive feedback circuit push-pull transformer;
the controller (28) current, connected to receive energy (27), AC transformer, and managed production of energy (29) AC what about the current; and
Converter (30), AC to DC, connected to receive a managed energy (29) AC energy (31) DC high voltage.

2. The driver according to claim 1, in which the energy (31) DC high voltage is produced on the conclusions (32) DC, and the driver led lamp further comprises a circuit (36) surge protector connected to the leads (32) DC.

3. The driver according to claim 2, in which the scheme (36) of the surge protection device is a diode.

4. The driver according to claim 2, in which the scheme (36) of the surge protection device is a silicon controlled rectifier (VHF) (42)connected in the starting circuit (44) VHF, responsive to the overvoltage conclusions (32) DC switching silicon controlled rectifier (42).

5. The driver of claim 1, wherein the switches (25) contain the first switch and the second switch, the control signals (35) contain the first control signal and second control signal, and a circuit (24) push-pull transformer contains:
push-pull transformer, which has a first primary winding, a second primary winding, a feedback winding connected to the first primary winding and the second primary winding and a secondary winding connected to the first primary winding and the second is ervices winding;
the first switch, responsive to a first control signal from the first end of the feedback winding;
a second switch, responsive to the second control signal from the second end of the feedback winding, and the first control signal and second control signal to provide a closure of the first switch and the second switch alternately.

6. The driver according to claim 1, additionally containing a rechargeable battery connected for energy production (23) DC low voltage, and the matrix (34) LEDs connected to receive power supply (31) DC high voltage.

7. The driver of claim 1, wherein the Converter (30), AC to DC is a full-wave diode bridge rectifier.

8. Camerasony driver led lamp, comprising:
push-pull transformer having a first primary winding, a second primary winding, a feedback winding connected to the first primary winding and the second primary winding and a secondary winding connected to the first primary winding and the second primary winding;
the first switch, responsive to a first control signal from the first end of the feedback winding;
a second switch, responsive to the second control signal, p is stepping from the second end of the feedback winding, the first control signal and second control signal to provide a closure of the first switch and the second switch alternately with the switching frequency is selected to establish a generation with positive feedback circuit 24 push-pull transformer;
the controller (28) current connected to the secondary winding; and
Converter (30), AC to DC, connected to a controller (28) current;
when this current flows through the first primary winding in the first direction when the first switch is closed, and the second primary winding in the opposite direction relative to the first direction, when the second switch is closed.

9. The driver of claim 8, additionally contains the schema (36) surge protector connected to the leads (32) DC Converter (30) AC to DC current.

10. The driver according to claim 9, in which the scheme (36) of the surge protection device is a diode.

11. The driver according to claim 9, in which the scheme (36) surge protection contains silicon controlled rectifier (VHF) (42)included in the starting circuit (44) VHF, and
start-up circuit (44) VHF reacts to stress on the conclusions (32) DC and includes a silicon controlled rectifier (42).

12. The driver of claim 8, in which the transformer has a middle point between the lane is th primary winding and the second primary winding, the driver further comprises:
the first DC current flowing from the first input clamp DC midpoint through the first primary winding, through the first switch, to the second input clamp DC, when the first switch is closed;
a second circuit of the constant current flowing from the first input clamp DC midpoint through the second primary winding, through the second switch, to the second input clamp DC, when the second switch is closed.

13. The driver of claim 9, further containing an inductor signal transmission connected between the first input clamp DC and the mid point of the first circuit DC and second DC adapter.

14. The driver of claim 8, further containing a filter protection from interference, connected to the first primary winding and the second primary winding.

15. The driver of claim 8, further containing a filter protection from interference, connected to the secondary winding.

16. The driver of claim 8, further containing a rechargeable battery connected to the first primary winding and the second primary winding to provide energy (23) DC low voltage, and the matrix (34) LEDs connected to the Converter (30), AC to DC to receive the deposits of energy (31) DC high voltage.

17. The driver of claim 8, in which the transducer (30) AC to DC is a full-wave diode bridge rectifier.

18. The way power led lamps energy DC low voltage containing phases in which: provide a transformer which has a first primary winding, a second primary winding and a secondary winding connected to the first primary winding and the second primary winding; get energy DC low voltage using a transformer; set Samaritans control for alternately switching the current between the first primary winding and the second primary winding and generates energy alternating current transformer secondary winding; energy-driven AC transformer to obtain a controlled AC energy; and convert the managed energy AC in energy DC high the tension.

19. The method according to p, optionally containing the exception of the possibility that the switching power supply high voltage DC.

20. The method according to p, optionally containing phase in which interference filter on the first primary winding and the second primary winding.

21. The method according to p, optionally containing a stage on which filter the noise on the secondary winding.



 

Same patents:

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering, particularly systems for controlling lamps by encoding an AC power signal. AC line voltage may be encoded with control information, such as dimming information derived from an output signal of a conventional dimmer, so as to provide an encoded AC power signal. One or more lighting units, including LED-based lighting units, may be both provided with operating power and controlled (e.g., dimmed) based on the encoded power signal. In one implementation, information may be encoded on the AC line voltage by inverting some half cycles of the AC line voltage to generate an encoded AC power signal, with the ratio of positive half-cycles to negative half-cycles representing the encoded information. In other aspects, the encoded information may relate to one or more parameters of the light generated by the LED-based lighting unit(s) (e.g., intensity, colour, colour temperature, etc.).

EFFECT: enabling control of multiple light parameters of a lighting unit.

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FIELD: electricity.

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10 cl, 3 dwg

FIELD: electricity.

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10 cl, 6 dwg

FIELD: electricity.

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EFFECT: simplification of the device.

15 cl, 27 dwg

FIELD: electricity.

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10 cl, 8 dwg

FIELD: electricity.

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21 cl, 11 dwg

FIELD: physics.

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EFFECT: high reliability and improved performance of the lighting device.

14 cl, 12 dwg

FIELD: electricity.

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16 cl, 8 dwg

FIELD: physics.

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11 cl, 6 dwg

FIELD: electricity.

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EFFECT: simplifying the device.

10 cl, 6 dwg

FIELD: mechanics, physics.

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EFFECT: simpler design, smaller sizes, brightness correction in wide frequency range.

3 dwg

FIELD: physics.

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EFFECT: reduced need to replace fluorescent tubes in fittings and reduced electrical power consumption.

3 cl, 2 dwg

FIELD: physics.

SUBSTANCE: invention relates to a light-emitting device (1) having an exciter (10) and a flat light-emitting element (20), where the exciter (10) is connected to a source (2) and a the light-emitting element (20), and where the light-emitting element (20), which has internal capacitance (21), is connected to the said exciter (10) so that the internal capacitance (21) serves as the passive output filter of the exciter (10).

EFFECT: design of a light-emitting device with smaller thickness.

10 cl, 9 dwg

FIELD: physics.

SUBSTANCE: proposed illuminator 10 built around LEds comprises assemblage of LED different-colour light sources 14 to produced mixed-colour light and LED source control device to control said sources in compliance with preset values. Note here that first control data are generated by, at least, one colour transducer 22. Illuminator differs from known designs in that its incorporates device 30, 32 designed to determine the temperature of each LED light source and device 26 to compensate for preset values in compliance with second control data including LED light source temperature.

EFFECT: higher stability of operation.

20 cl, 2 dwg, 1 tbl

FIELD: physics.

SUBSTANCE: invention relates to a device for powering luminous elements, having an energy supply unit (12), a first luminous element (30), having a first colour, preferably white, a second and a third luminous element (34, 38), having a second and a third colour, preferably for adjusting the colour of the first luminous element, and a controlled switch (42), connected in series to the said third luminous element (38). Said serial connection from the said third luminous element (38) and said switch is connected in parallel to the said second luminous element (34). The energy supply device is characterised by that the said energy supply unit (12) has a third and a second output (20, 22). The said first luminous element (30) is connected to the said first lead (20) and the said second and third luminous elements (34, 38) are connected to the said second led (22), the said energy supply unit (12) is configured to provide controlled, preferably independently controlled, output signals on the said first and second leads (20, 22), and the said second and third luminous elements (34, 38) and the said energy supply unit (12) are configured in such a way that, the said third luminous element (38) emits light when the switch (42) is closed. The invention also relates to a method of powering the luminous elements.

EFFECT: fewer switches.

20 cl, 4 dwg

FIELD: physics.

SUBSTANCE: circuit (1) with light-emitting diodes is provided with first subcircuits, having first light-emitting diodes (11) and second subcircuits having second light-emitting diodes (13) and switches (14), in conducting states, for switching on the second light-emitting diodes (13) and switching off the first light-emitting diodes (11), and, in non-conducting states, for switching off the second light-emitting diodes (13) and switching on the first light-emitting diodes (11). Also, the first and second subcircuits have different signal characteristics, such as different minimum threshold voltage values, so as to be realised by different types of light-emitting diodes (11, 13) or using a different total number of serial light-emitting diodes (11, 13) or by adding elements with threshold voltage to the first subcircuits. The light-emitting diodes (11, 13) have different colours and can be used backlight.

EFFECT: simplification.

16 cl, 4 dwg

FIELD: physics.

SUBSTANCE: illumination device (1) comprises, for example, diodes LED (L1, L2, L3, L4) with separate emission spectra. Detectors D1, D2, D3, D4) can generate a vector of measurement signals (S1, S2, S3, S4) which represent light output of one active light emitter. Further, based on a linear relationship obtained during the calibration procedure, the characteristic value of the light output of that light emitter (L1, L2, L3, L4) is calculated using the measurement vector, wherein said characteristic value is based on the decomposition coefficient of an individual emission spectrum on basic functions.

EFFECT: improved method.

25 cl, 6 dwg

FIELD: physics.

SUBSTANCE: illumination system (100) comprises: a set (14) of lamps; a controller (115); a user input device (19); memory (120) which determines discrete colour points containing an ID table (121) of hue, an ID tale (122) of saturation, an ID table (123) of brightness and boundary memory (124) which determines the boundary of the colour space. Based on data (x1, x2, x3) received from the user input device and information in the memory, the controller generates colour control signals (ξ1, ξ2, ξ3) for the set of lamps. The controller compares user input data with information in the boundary memory. If the controller detects that the said point lies beyond the boundaries of the colour space, the controller calculates the replacement point on the boundary of the colour space which was determined in the boundary memory (124), and generates is control signals based on the replacement point.

EFFECT: reduced volume of memory space required.

3 cl, 3 dwg

FIELD: physics.

SUBSTANCE: switched array of light elements has first, second and third light-emitting elements and first and second switches. The first light-emitting element has first and second leads, and the second light-emitting element has a first lead and a second lead connected to the second lead of the first light-emitting element. The third light-emitting element has a first lead connected to the first lead of the first light-emitting element, and a second lead. The first switch has a first lead connected to the first leads of the first and third light-emitting elements, and a second lad connected to the first lead of the second light-emitting element. The second switch has a first lead connected to the second lead of the third light-emitting element, and a second lead connected to the second leads of the first and second light-emitting elements.

EFFECT: fewer circuit components.

13 cl, 8 dwg

FIELD: electricity.

SUBSTANCE: matrix of luminous elements (100) includes the first (LEE1), the second (LEE2) and the third (LEE3) light-emitting elements and the first (140) and the second (150) controlled current sources. The first light-emitting element differs with the first operating voltage VOpi at which or over which it can essentially emit the light. The second light-emitting element includes the first output (120a) and the second output (120b) connected to the second output of the first light-emitting element; at that, the second light-emitting element differs with the second operating voltage Vop2. The third light-emitting element includes the first output (130a) connected to the first output (110a) of the first light-emitting element and the second output (130b); at that, the third light-emitting element differs with the third operating voltage Vop3. The first controlled current source is connected between the first output of the first light-emitting element and the first output (120b) of the second light-emitting element, and the second controlled current source is connected between the second output (110b) of the first light-emitting element and the second output of the third light-emitting element.

EFFECT: reducing the number of circuit components.

15 cl, 5 dwg

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