Actuator for solid-state lamp
SUBSTANCE: invention relates to lighting engineering. An electronic actuator (100) for solid-state lamp start-up is designed to receive the alternating-current voltage with the phase cutoff; receive from the alternating-current voltage with the phase cutoff of data on light regulation that defines the required level of light regulation at the lamp output; start up the solid-state lamp in the light-regulation mode at the level of light regulation corresponding to the required level of light regulation received from the alternating-current supply voltage with the phase cutoff. The actuator record input current; it comprises a lamp current control generator (130); a control device that controls the lamp current control generator, a rectifier (110) that rectifies the received alternating current supply voltage with the phase cutoff; a current sensor (150) that records an output current of the rectifier; a signal processor (160) that processes an output signal of the current sensor and generates an input signal for the control device (140).
EFFECT: regulation of light intensity.
9 cl, 13 dwg
AREA of TECHNOLOGY
The present invention relates primarily to the field of lighting.
For the purpose of lighting, for example, residential buildings for a long time it was known the use of incandescent lamps, the power supply by means of the power supply circuit; in Europe the supply chain usually passes AC voltage of 230 V at 50 Hz. A big problem with incandescent bulbs is that they convert only a small portion of the available electrical energy into light energy: a lot of energy is consumed is lost as heat. Thus, was developed and is now being developed more efficient in the use of lamps, such as discharge lamps, and, in particular, solid-state lamps, such as LED (light emitting diodes). It is highly desirable to replace incandescent solid-state lamps in the existing situation. Solid-state light sources such as LED, it is necessary to run the electronic triggering device, which receives the voltage of the mains and generates the output current of the lamp. This may be a separate device, but for convenience have been developed light-emitting diode (LED) lamp units, combined with led light source and electronic triggering device. In particular, the present invention relates to such join�Nenno solid state lamp units, can replace existing incandescent bulbs.
Incandescent lamps have a rated power of, for example, 60 W, 100 W, etc., which corresponds to the current of the lamp when the power supply voltage and which corresponds to the amount of light emitted by a lamp. Similarly, LEDs have a rated power corresponding to the rated current of the lamp. In some circumstances it is desirable that it was possible to reduce the amount of light emitted by the same lamp. With this purpose have been developed dimmers (dimmers). For the case of LEDs electronic triggering device in which the output current of the lamp is adjustable, has a function of reducing light intensity. Also, in particular, for filament lamps, were developed electronic dimmers for mains, working on the basis of the cutoff phase. Since the dimmers with a cut-off phase is generally known, their discussion will be omitted here. Note that these dimmers can be configured as a wall-mounted dimmers, so that the lamp supply voltage has always been "regulated" voltage.
Fig. 1A depicts a block diagram, schematically illustrating one possible example of a lighting system with wall dimmer, 1 for the power, and Fig. 1B depicts a similar block diagram of another example. In both cases, the dimmer 1 PR�receives alternating current mains (Europe: 230 V ~ 50 Hz) input voltage and outputs the alternating current with a cut-off phase as the output voltage. The user can control the dimmer 1, for example by rotation of the control arm 2, which encourages dimmer 1 to change the setting phase, in which the clipped AC voltage. In the example of Fig. 1A presents the AC power outlet 3 connected to the output of the dimmer and the armature 20 of a lamp equipped with an electric cord 23, terminating in a fork 24, which must be inserted into the power outlet 3. In the system of Fig. 1B, the valve 20 of the lamp connects directly to the output of the dimmer. In both cases, the valve 20 lamp power is supplied via electronic dimmer 1, i.e. it only accepts an AC voltage with a cut-off phase, designated as PCACV.
Fig. 2 illustrates that the valve 20 may include a cartridge 21 of the lamp to mechanically receive and retain the base 12 of the bulb 10 bulbs and for electrical connection of the lamp base 12 to the wiring 22 of the armature 20.
Figure 3A depicts a block diagram, schematically illustrating an led lamp unit 30 containing at least one solid state lamp 31, such as an led element of the light source, and a triggering device 32 LEDs having input terminals 33, 34 of the outlet for receiving the AC mains voltage and having output terminals 35, 36 for supplying the output current of the led to the led element 31 of the light source�.
Figure 3B schematically illustrates a preferred physical implementation of the led lamp unit 30 according to the present invention, containing the first part 37 of the housing accommodating an electronic circuit 32 of the launching device and is designed for combining with cartridge valves 21 of the lamp, and the second part 38 of the housing that houses one or more led elements of the light source.
Difficulties arise if the adjustable led lamp unit 30 needs to be combined with armature 20, which is powered in such a dimmer for mains power, for example due to the fact that the regulated filament lamp must be replaced by an adjustable tube led unit 30. In such a regulated led lamp unit triggering device 32 then take the voltage PCACV outlet c cutoff phase at its input terminals 33, 34 power. This triggering device 32 of the lamp, at the same time, designed to receive the full AC voltage, as explained above, it would be able to operate in the mode siterepository when receiving voltage PCACV AC with a cut-off phase. So on one side of the electronic triggering device LEDs should function properly when receiving the AC mains voltage with a cut-off phase in qualities� power. On the other hand, the power supply voltage with a cut-off phase contains information about the regulation of light in the form of a phase angle related to the level of regulation of light required by the user, and requires that electronic led dimmer could use this information as a user input signal, to read this information on the regulation of light and thus to regulate the output current for led lamps. Such dimmers, in themselves known and are designed to control light so as to adjust the light of the respective LEDs, i.e. it provides a suitable output voltage or current to the LEDs in response to the phase angle of the input voltage.
SUMMARY the essence of the INVENTION
The present invention relates mainly to the problem of detecting information concerning the regulation of light in the voltage of AC power with a cut-off phase at the output of the dimmer, which is an input voltage for a triggering device. In the prior art is usually done by measuring the effective value (RMS) of the input voltage.
Fig. 4 depicts a diagram schematically illustrating an ideal waveform of the output voltage�of the dimmer (assuming, that no load or connected resistive load), using the light control on the falling edge. The waveform of the output voltage has the shape of a sine wave that starts from zero and reaches a certain phase, the time which the output voltage drops sharply to zero, and the output voltage remains at zero until the next zero crossing of the sine wave.
Fig. 5 depicts a simplified block diagram illustrating some basic principles of making a wall-mounted dimmers. Wall dimmers can replace conventional network switches, for this reason, they have only one input 51 for connection to a power line and one output 59 for connection to the load. Between the inlet 51 and the outlet 59 is mounted managed switch 52, or closed (conducts current) or open. Dimmer 1 further comprises a circuit 53 to control the switch 52, this management plan 53 receives power supply from the inlet 51 and outlet 59. Obviously, when the switch 52 is closed, the voltage drop between the inlet 51 and the outlet 59 and, consequently, the power supply circuit 53 control would be equal to zero. Additionally, hard switching is causing electromagnetic interference. To reduce such electromagnetic interference and to maintain a power supply for the circuit 53 management, parallelepipedal 52 connects the capacitive element 54 between the inlet 51 and the outlet 59. The capacitive element 54 tries to maintain its voltage. As a result, the output voltage of the dimmer 1 does not drop to zero abruptly, as shown in Fig. 4.
Fig. 6A depicts a graph showing the actual output voltage of the dimmer, in the case of the AC mains voltage at 50 Hz, when the dimmer is set to the time of conductivity of 2 MS (phase cutoff =36°) and connected active load LR. The active load causes a relatively rapid discharge of the capacitive element 54, and the phase cut-off can be easily determined. The RMS value of the voltage in this case is equal to 54 V.
Fig. 6B depicts a similar graph for the situation when the active load LR is replaced by a launching device 32 LEDs. This triggers the device LEDs, typically with the input stage of the rectifier bridge, does not provide sufficient current flows through the circuit when the switch 52 is open, and the capacitive element 54 maintains the discharge. It is difficult to determine the phase of the cutoff. The RMS value of the voltage is 140 V. it is very difficult not only to distinguish between multiple levels of dimming from the point of view of reduced range of values of RMS, but also difficult to predict how it will change the RMS value of the cutoff angle, at the same time, this characteristic may change from one individual dimmer to other�WMD.
The outcome of the previous prior art is directed to discharge the capacitive element 54 by providing circuits division voltage in the triggering device of the led. While this approach works in the sense that the ability to detect the phase cut-off increases, the disadvantage is that it increases the power dissipation.
The main object of the present invention is to eliminate or at least reduce the aforementioned problems. In particular, objectives of the present invention is to provide a more accurate phase detection cutoff with less power dissipation.
To solve these problems the present invention proposes to measure the input current to trigger the device, not the input voltage.
Additional advantages are mentioned in the dependent claims.
BRIEF description of the DRAWINGS
The invention is further explained by description of the preferred embodiments of the invention with reference to the accompanying drawings, in which:
Fig. 1A depicts a block diagram, schematically illustrating one possible example of a wall dimmer to outlet;
Fig. 1B depicts a block diagram, schematically illustrating another possible example of a wall dimmer to outlet;
Fig. 2 depicts schematically lamp fittings;
Fig. 3A schematically depicts CBE�didny the lamp unit;
Fig. 3B schematically depicts a preferred physical implementation of the led lamp unit;
Fig. 4 depicts a diagram schematically illustrating an ideal waveform of the output voltage of the dimmer using the control on the falling edge;
Fig. 5 depicts a simplified block diagram illustrating some basic principles of the wall dimmer;
Fig. 6A depicts a graph showing the output voltage of the dimmer in the case of active load;
Fig. 6B depicts a graph showing the output voltage of the dimmer in the event of a launching device of the led as a load;
Fig. 7 depicts a block diagram, schematically illustrating a launching device of the led according to the present invention;
Fig. 8 depicts a block diagram, schematically illustrating a possible embodiment of the input stage of a launching device;
Fig. 9A and 9B depict waveforms of signals in a launching device in accordance with the present invention.
DESCRIPTION of PREFERRED embodiments of the INVENTION
Fig. 7 depicts a block diagram, schematically illustrating the triggering of the led device 100, in accordance with the present invention is arranged to measure the input current, not the input voltage. �opuskayuschie device 100 led has input terminals 101, 102 for receiving the voltage PCACV AC power with a cut-off phase from the dimmer and output terminals 198, 199 to connect to one or more of the LEDs L. Rectifier 110 has input terminals 111, 112 connected to the input terminals 101, 102 of the launching device, and has output terminals 118, 119, providing a rectified voltage RPCAC outlet. This voltage is used to charge the buffer 120, causing the current ICcharging. A controllable oscillator 130 current lamp receives power from the buffer 120 and is designed to generate a suitable current ILlamp. The device 140 controls, which may, for example, include a suitable programmable microprocessor that controls the generator 130 of the lamp current, so that current ILthe lamp is generated in accordance with some desired output level lighting control based on the input signal received at input terminal 141 of the data. Since the structure and operation of suitable generators of lamps and control devices in themselves known and are not the subject of the present invention, a more detailed explanation of their construction and operation will be omitted here.
The launching device 100 further comprises a detector 150 current, fit for detecting the input current to trigger the device 100, or the current charging Ic, or in any� case, signal representing one of these currents, or signal proportional to these currents. Diagram 160 of the signal generator receives the output signal from the detector 150 current and provides a signal Sdr of inquiry on the regulation of light to the input terminals 141 device data 140 management. Note that the circuit 160 of the signal generator can be combined with the detector 150 current or can be combined with the device 140 controls.
Fig. 8 depicts a block diagram, schematically illustrating a possible embodiment of the input stage of the launching device 100 in more detail. The rectifier 110 is implemented as a bridge circuit of four diodes in a well known configuration. The launching device 100 has a line 103 to the positive bus, combined with the positive output terminal of rectifier 118 and the line 104 negative rail. In this embodiment of the detector 150 is associated with the current output of the rectifier 110, more precisely connected between the line 104 negative rail and the output negative terminal 119 of the rectifier. The detector 150 is implemented as a current Assembly of the resistor 151 connected in parallel serial connection of a plurality of diodes 152. In this embodiment, the implementation of two diodes placed in series, but it is possible to use only one or use three or more diodes. Node a between the detector 150 �of an eye, and a negative output terminal 119 of the rectifier is the output of the detector current.
Diagram 160 of the signal generator comprises a first transistor Q1 having a collector connected to the positive voltage Vcc supply via the first resistor R1, having a base connected to the line 104 negative rail via a second resistor R2, and having an emitter connected to the output of A detector. Diagram 160 of the signal generator comprises a second transistor Q2 having a collector connected to the line 103 to the positive bus via the third resistor R3 having a base connected to the collector of the first transistor through the fourth resistor R4, and having an emitter connected to the line 104 negative rail. The fifth resistor R5 is connected to the terminals of the collector and the emitter of the second transistor Q2. In parallel, the fifth resistor R5 is connected parallel arrangement of the sixth resistor R6 and capacitor C1. The node between the sixth resistor R6 and the capacitor C1 is the output 169 of the scheme 160 of the signal generator, outputting a signal Sdr request a light control device 140 controls.
Preferably, the buffer 120 was of a type that would provide high power factor. The approximate variant of the implementation of the buffer 120 shown in Fig. 8, fulfills this requirement. Alternative embodiments of performing this requirement should be clear to experts in this field of technology.
Job description�on next.
Without input current the voltage drop across the diodes 152 missing, the first transistor Q1 does not conduct a current, the second transistor Q2 receives a positive voltage Vcc of the power and conducts current to discharge the capacitor C1.
In the presence of the input current appears sufficient voltage drop across the diodes 152, to cause the first transistor Q1 to conduct current. The voltage at the collector of the second transistor Q2 resulting in the immediate appearance of voltage on the line 103 to the positive bus, and this voltage is used to charge the capacitor C1.
Thus, the voltage on the capacitor C1 receives a substantial constant value, which increases when the time periods with the input current is continuous, and which decreases when the time periods with the input current short. The voltage on the capacitor C1 is transferred to the output 169. In fact, R5, R6 and C1 constitute a low pass filter.
Fig. 9A depicts a graph showing the waveform of the voltage at the collector of the first transistor Q1 to the same situation as in Fig. 6B. The RMS value is 100 mV in this example. Fig. 9B depicts a graph showing the wave form of the same voltage for the case in which the conduction time is 9 MS. The RMS value is equal to 1700 mV in this example.
Note that an implementation option, discussed above, is particularly suitable for�it to merge with control circuits. developed for measurement and analysis of the RMS value of the input signal derived from the input voltage. However, it is also possible that the control scheme really selects time cutoff of the input signal. For such cases it would be enough of a rectangular signal with pulse-width modulation, and the signal at the collector of the first transistor Q1 could be used without the need for schemes around the second transistor Q2.
In the end, the present invention provides an electronic triggering device 100 to launch solid state lamp L, is arranged to:
- reception voltage PCACV AC power with a cut-off phase;
- receiving voltage from an AC power with a cut-off phase information on the regulation of light, which determines the required level of regulation of light bulbs;
- start solid state lamp mode light regulation level regulation of light corresponding to the required level adjusting light output from the voltage of AC power with a cut-off phase.
For the purpose of obtaining information on the regulation of light triggering device registers its input current.
In one embodiment of the launching device comprises:
- driven generator 130 of the lamp current;
- mouth�eusto 140 management controls the current generator lamp;
- the rectifier 110, rectifying the received voltage AC power with a cut-off phase;
detector 150 current, recording the output current Ic of the rectifier;
diagram 160 of the signal generator, processing the sensor output current and generating an input signal for the device 140 controls.
Although the invention has been illustrated and described in detail in the drawings and in the preceding description, specialists in the art it will be clear that such illustration and description should be considered illustrative or exemplary and not limiting. The invention is not limited to the disclosed variants of implementation, rather some variants and modifications are possible in the protected scope of the invention as described in the appended claims. For example, the trigger device for controlling light may be due to the fitting of the lamp.
Other variations to the disclosed embodiments can be understood and implemented by experts in the field of technology in the implementation of the claimed invention from a study of the drawings, the description and the attached claims. In the formula, the word "contains" does not exclude other elements or steps, and the singular does not exclude the plural. The only manufacturi� or other unit may fulfill the functions of several units, listed in the claims. The mere fact that some tools are listed in many different dependent claims does not indicate that a combination of these means cannot be used to obtain benefits. Any symbols in the claims should not be construed as limiting the scope of the invention.
Above the present invention has been explained with reference to block diagrams, which illustrate functional blocks of the device according to the present invention. It should be understood that one or more of these functional blocks may be implemented in hardware, where the function of such functional block can be performed by individual hardware components, but it is also possible that one or more of these functional blocks are implemented in software so that the function of such functional block is performed by one or more program lines of a computer program or a programmable device, such as a microprocessor, microcontroller, digital signal processor, etc.
1. Electronic triggering device (100) to run a solid state lamp (L) that contains:
- input voltage (PCACV) AC power with a cut-off phase;
- processing means for obtaining izabrajenia (PCACV) AC power with a cut-off phase information on the regulation of the level of intensity, defining the required level of light output of the lamp (L);
- launching means for launching a solid-state lamp (L) in the mode of regulation of intensity level of intensity appropriate for the desired level of light output obtained from the voltage (PCACV) AC power with a cut-off phase;
moreover, with the purpose of obtaining information about the level of intensity, treatment products contain a detector (150) for current registration of the input current of the launching device.
2. A launching device according to claim 1, containing:
- driven generator (130) the lamp current to generate a current (IL) lamps;
- buffer (120) to provide a voltage controlled oscillator (130) of the lamp current;
device (140) control input (141) for receiving data signal (Sdr) request for the light control is designed to control the generator (130) the lamp current, for generating a current regulation of light bulbs in accordance with the signal (Sdr) inquiry about the regulation of light;
- the rectifier (110) for converting a received voltage (PCACV) AC power with a cut-off phase rectified voltage (RPCACV) AC power with a cut-off phase, wherein the rectifier (110) has input terminals (111, 112) for receiving a voltage (PCACV) AC power with a cut-off phase and output terminals (118, 119) connected to the buffer (120) glaskabine DC voltage (RPCAC) AC power with a cut-off phase of the said buffer (120), to charge the buffer (120) current (Ic) charge;
detector (150) current, fit for the reception of the output current (Ic) charging rectifier (110);
diagram (160) of the signal generator, adapted to process the output signal of the current detector and to generate a signal (Sdr) request for the light control device (140) controls.
3. A launching device according to claim 2, wherein the detector (150) current contains one diode or layout of series-connected two or more diodes (152) placed in series with the output terminal (119) of the rectifier.
4. A launching device according to claim 3, in which the detector (150) current further comprises a resistor (151) located in parallel with the diode or diodes (152).
5. A launching device according to claim 2, wherein the circuit (160) of the signal generator designed for generating a signal (Sdr) inquiry about the regulation of light as a signal proportional to the average value of the output signal of the detector current.
6. A launching device according to claim 5, in which the circuit (160) of the signal generator contains:
the second transistor (Q2) the emitter terminal connected to the single bus (104) triggering voltage of the device, with the collector terminal that is connected to another bus (103) voltage triggering device via the first resistor (R3), and a terminal base which is connected with a suitable�appropriate source (Vcc) through a divider (R1, R4) voltage;
low-pass filter (R5, R6, C1) to the input connected to the collector terminal of the first transistor (Q1), and with output connected to signal output (169) circuit (160) of the signal generator;
the first transistor (Q1) with the collector terminal connected to the node of the divider (R1, R4) voltage, to the terminal base connected to the bus (104) voltage triggering device via a second resistor (R2), and with the emitter terminal connected to the output (A) of the detector (150) current.
7. A launching device according to claim 2, wherein the buffer (120) comprises at least one capacitor.
8. The lamp unit (30) containing at least one solid state lamp (31) and at least one triggering device (32, 100) according to any one of claims. 1-7, to run at least one solid state lamp.
9. The valve (20) for receiving at least one solid state lamp (31) containing at least one triggering device (32, 100) according to any one of claims. 1-7, to run at least one solid state lamp.
SUBSTANCE: invention relates to the lighting module for electrical and thermal connection with power infrastructure, having at least one power source, at that each power source contains two electrodes. The lighting module contains the light source for the light emission, in it the light source is the heat source during the light emission, two electric contacts to ensure contact with the electrodes of at least one power source, by this the electric connection is ensured between the lighting module and power infrastructure; control system located between the light source and electric contacts to control the power supply to the light source, in which the lighting module contains the measurements system measuring the thermal resistance of the thermal connection between the lighting module and power infrastructure during making of the electric connection , and in which the control system is made with possibility to reduce power supply to the light source when the thermal resistance is above the pre-set value to protect the lighting module against overheating. Invention also relates to the method of lighting module protection against overheating.
EFFECT: improved operation reliability of the module.
15 cl, 5 dwg
SUBSTANCE: invention relates to lighting devices and control of operation of lighting devices. The result is achieved by that the system for control of the level of luminous efficiency of the solid-state lighting load operated by the illumination regulator includes the detector of phase angles and the load converter. The detector of phase angles is designed with a possibility of measurement of phase angle of the illumination regulator on the basis of rectified voltage from the illumination regulator and determination of the power control signal on the basis of comparison of the measured phase angle with pre-set first threshold. The power supply converter is designed with a possibility of supply of output voltage into the solid-state lighting load, and the power supply converter operates in the mode without feedback on the basis of rectified voltage from the illumination regulator when the measured phase angle is greater than the first threshold, and operates in the mode with feedback on the basis of the rectified voltage from the illumination regulator and a certain power control signal from the circuit of determination when the measured phase angle is less than the first threshold.
EFFECT: reduction of luminous efficiency in solid-state lighting load at low settings of the respective illumination regulator.
20 cl, 9 dwg
SUBSTANCE: invention refers to lighting engineering. The lighting block contains at least two channels of the light sources and exciter for light sources. The exciter includes DC voltage converter and control system to control current supplied to at least one of two channels as response to the control signal provided by the DC voltage converter. Preferably the feedback circuit is controlled by the switching device in DC voltage converter to maintain the light level ensured by the light sources at the required level regardless of voltage changes of the power source and load.
EFFECT: increased efficiency of the light source control to achieve the required illumination effect.
18 cl, 5 dwg
SUBSTANCE: invention is referred to lighting devices and control of the lighting devices operation. The result is attained due to determining of maximum and minimum angles of a dimmer (204) connected to a power converter (220) during the operation of a solid-state lighting load (240); and dynamic regulation of the output power for the power converter based on the determined maximum and minimum angles of the dimmer. The regulated output power of the power converter regulates the upper level of the light output by a load of solid-state lighting at the maximum phase angle so that the preset upper limit value is met and regulates the lower level of the light output by a load of solid-state lighting at the minimum phase angle so that the preset lower limit value is met.
EFFECT: control of the power converter in order to ensure an equal range of light control to the load of solid-state lighting notwithstanding the type of the dimmer.
18 cl, 12 dwg, 2 tbl
SUBSTANCE: invention relates to lighting engineering. Illumination device (1) contains at least one light source (50) of low power; input power supply cascade (20) fit for receipt of low alternate voltage from an electronic transformer (ET); buffer power supply cascade (30) having input (31) connected to output (29) of the input power supply cascade; excitation circuit (40) intended for excitation of light and receipt of power supply from the buffer power supply cascade. The input power supply cascade generates output current pulses in order to charge the buffer power supply cascade at relatively low frequency, and during each output current pulse the input power supply cascade consumes input current, output current always has current value bigger than the required minimum load for the electronic transformer.
EFFECT: reducing light blinking by improving compatibility between light sources and electronic transformer.
15 cl, 8 dwg
SUBSTANCE: invention relates to lighting. Result is ensured by that the lighting device contains multiple LEDs connected in series. In the lighting device the first set of LEDs has first type LEDs, having first output of the light flow decrease as first function of the junction temperature. The second set of LEDs has second type LEDs having second output of the light flow decreased as second function of their junction temperature that differs from the first function. At least one first type LED and one second type LED are connected in parallel to the resistors set with resistance depending on the temperature. The resistance temperature dependence stabilizes ratio of the first light flow output to the second light flow output at different junction temperatures of the first set of LEDs and second set of LEDs.
EFFECT: prevention of change of ratio of light flow output of various types LEDs as part of same lighting device.
13 cl, 11 dwg
SUBSTANCE: invention relates to lighting engineering. Lighting installation (1) comprises input pins (2) for connection to alternating current (AC) network; a circuit (10) of light-emitting diodes (LED) connected in series with input pins; rectifier (30) with input pins (31, 32) connected in series with LED circuit, controllable voltage source (40) with input pins coupled to output pins of the rectifier; in-series assembly of at least one auxiliary LED (51) and the second ballast resistor (52) coupled to output pins of the controllable voltage source. Voltage source comprises in-series assembly of the fist controllable resistor (46) and the second resistor (47) coupled in parallel to input pins; controllable semiconductor stabilitron connected in parallel to output pins, which has input pin (48) connected at connection point between two resistors; at that positive output pin is connected to positive input pin while negative output pin is connected to negative input pin.
EFFECT: simplified regulation of the device in regard to luminous power and luminous efficiency shift to lower colour temperature.
7 cl, 2 dwg
SUBSTANCE: invention relates to lighting engineering. In LED circuits (1) comprised of in-series first and second circuits (11, 12) with the first and second LEDs; the third circuits (13) are connected in parallel to the second circuits (12) to control the first LEDs in the first circuits (11) and /or third LEDs in the fourth circuits (14). The LED circuit (1) receives supply voltage from a power supply source (2, 3) supplying the LED circuit (1). The third circuit (13) receives supply voltage from the second circuit (12) supplying the third circuit (13). Supply voltage may be represented as voltage in the second circuit (12). The third circuit (13) may control the second LEDs in the second circuit (12) additionally. The above control may contain control unit for current passing through the above LEDs in order to turn light down, suppress light blinking, to adjust light and/or to protect overheating.
EFFECT: improving control efficiency.
13 cl, 5 dwg
SUBSTANCE: invention relates to lighting engineering. An excitation circuit of LED with adjustable brightness includes a resonant DC/DC converter connected to a resonant circuit. The converter includes a half-wave or double-wave switching circuit connected to the resonant circuit. An output signal of the resonant circuit is rectified and supplied to an output circuit. The output circuit can contain at least one series or shunting LED switch for switching on and off a LED unit. The control circuit controls switches of the switching circuit with a variable switching frequency and is configured to control the switching circuit for amplitude modulation of the converter and for pulse-width modulation of the converter with the first frequency of pulse-width modulation that is lower than the switching frequency. The control circuit can be additionally configured to control switching of the LED switch with the second frequency of pulse-width modulation that is lower than the switching frequency.
EFFECT: providing deep brightness adjustment with stable control of a working cycle of pulse-width modulation.
10 cl, 7 dwg
SUBSTANCE: invention is related to the area of lighting engineering. The LED device comprises several parallel branches of one or more in series light-emitting diodes through which in the operating state the respective portion of operating current passes through the LED device and a current source to supply operating current. The circuit is made to identify the biggest partial current and the operating parameter ensured by the current source on the base of this biggest partial current and to regulate it so that non of partial currents exceeds the preset maximum current.
EFFECT: more reliable operation of the device.
15 cl, 1 dwg
FIELD: mechanics, physics.
SUBSTANCE: device to excite electroluminescence consists of input unit connected in series with microprocessor unit, sinusoidal oscillation generator, amplitude-frequency response corrector, step-up transformer and exciting electrodes furnished with plates for the specimen to be placed there between. Note that the said exciting electrodes are optically coupled with the photo receiver connected with the ADC which, in its turn, is connected with the microprocessor unit. The latter is connected to the display unit and amplitude-frequency response corrector, while the sinusoidal oscillation generator is connected via a feedback loop with the microprocessor unit.
EFFECT: simpler design, smaller sizes, brightness correction in wide frequency range.
SUBSTANCE: fluorescent tube fitting device has a light-emitting diode element (4) which includes at least one electric starter element (4.1) connected to at least one phase conductor and also connected to at least one neutral wire at least through one conductor (4.2) having at least one light-emitting diode (4.3).
EFFECT: reduced need to replace fluorescent tubes in fittings and reduced electrical power consumption.
3 cl, 2 dwg
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
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
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
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.
16 cl, 4 dwg
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
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
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
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