Multichannel lighting block and exciter for current supply to light sources in multichannel lighting block

FIELD: electricity.

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

 

Area of technology

The present invention is directed, in General, to lighting unit and the exciter for the lighting unit. In particular, disclosed in this document, the methods and devices conforming to the invention relate to a lighting unit having a plurality of LED light sources, and the causative agent for such lighting unit.

Art

Lighting devices based on semiconductor light sources, e.g. light emitting diodes (LEDs), provide a viable alternative to traditional fluorescent lamps, discharge lamps high intensity and filament lamps. Functional advantages and benefits of LEDs include high efficiency of energy conversion and optical efficiency, durability, lower operating costs and more. Recent advances in LED technology have provided efficient and reliable lighting sources of a wide range, allowing to achieve different lighting effects in many applications. Some valves embodying the features of one or more sources of lighting units comprise one or more LEDs, capable of forming different colors, e.g., red, green, and blue, and a CPU to control each LED output for g�the generation of different colors and lighting effects with a color change. These lighting units can use two or more groups or "channels" LED, which form light of different colors, each of which is equipped with proper current to ensure the generation and mixing of light to produce the desired lighting effect, for example, as discussed in detail in the U.S. patents Nos. 6016038 and 6211626 included in this description by reference.

In some lighting blocks, the first channel may include a first set of white LED (for example, four LEDs), connected in series with each other, and the second channel may include a second array of red LEDs (two LEDs), connected in series with each other. The desired color effect of the lighting unit can be managed by adjusting the current through two channels. In some lighting blocks the channels are connected in series, allowing a single stream or channel current flowing through the LED, and the selected LED (e.g., LED the second channel) are bridged to drain current from the selected LED to achieve the desired colour effect.

Unfortunately, this arrangement usually entails loss of energy and/or complicated control scheme. For example, if the shunt is a linear bypass surgery, this can lead to additional unwanted power losses. M�are encouraged to use dial-up or pulse-width modulated (PWM) shunt, but known layout require complicated schemes of excitation.

Thus, in the technique there is a need to ensure the lighting unit with multiple channels of LEDs, which can effectively excite to achieve the desired lighting effect.

Summary of the invention

The present disclosure relates to a lighting unit and exciter for the lighting unit.

For example, the present disclosure describes a lighting unit that includes at least two channels of light sources and the causative agent for light sources. The exciter includes a voltage Converter DC and arrangement of the control current supplied to at least one of the two channels, in response to the control signal produced by the inverter DC voltage. Preferably, the feedback circuit controls the switching device in the inverter DC voltage to maintain the level of light produced by the light sources at the desired level regardless of changes in the voltage of the power supply and the load.

In General, in one aspect, the device includes: the first channel of the first light-emitting devices (LEDs) connected in series with each other; a second channel of the second LED connected in series�individual with each other; and exciter for excitation of the first and second channels LED. At least one of the second LED has a different color or a different color temperature than at least one of the first LED. The exciter includes: a flyback Converter, a buck Converter, pulse width modulator, and a feedback device. The flyback Converter is used for receiving the first DC voltage and output the second DC voltage. Buck Converter is designed to receive the second DC voltage and generating an output voltage which causes a first current to flow through the first channel of the LED and a second current to flow through the second channel LED. Pulse width modulator is designed to control a second current flowing through the second channel of LEDs, in response to the control signal. The control signal is produced from the windings of the inductance coil in one of the flyback Converter and down Converter. The feedback device is intended to measure at least one of the first current and the second current and, in response, controls the switching operation of the step-down Converter.

In some embodiments, the first channel of the LED is connected in series with the second channel LED. The causative agent may include �temperature monitor instructions, adapted for sensing the temperature of the at least one LED, and, in response, generating a feedback signal to adjust the output voltage of the inverter DC voltage. The pathogen also may include a light sensor designed to detect light emitted by the LED, and, in response, generating a feedback signal to adjust the output voltage of the inverter DC voltage.

In General in another aspect the device includes a first group of light sources, connected in series with each other, the second group of light sources, connected in series with each other, and exciter for excitation of the first and second groups of light sources. At least one of the light sources of the second group has a different color or a different color temperature than at least one of the light sources of the first group. The exciter includes the inverter DC voltage and the control device. The inverter DC voltage is suitable for receiving the first DC voltage and output the output voltage. The output voltage causes a first current to flow through the first group of light sources and a second current to flow through the second group of light sources. The control device �rednaznachena to control a second current, supplied to the second group of light sources in response to the control signal. Converter of DC voltage produces a control signal.

In some embodiments, the control device includes a pulse width modulator that controls a second current flowing through the second group of light sources, by shunting a second current to bypass one or more second light sources in response to the control signal. In addition, the second light sources can have a different color or a different color temperature than the first light sources.

In one embodiment of the Converter DC voltage includes a flyback Converter. The control signal for controlling the current flowing through the second group of light sources is produced by winding of the transformer in the flyback Converter. In another embodiment of the Converter DC voltage includes a buck Converter. The control signal for controlling the current flowing through the second group of light sources is produced by the winding of the inductor in the step-down Converter.

In addition, the pathogen may include a feedback device that is designed to measure at least one of the first current and in�section, which current and, in response to this, control the switching operation of the inverter DC voltage. Additionally or alternatively, the pathogen may include a sensor, sensitive to temperature or light emitted from at least one of the first and second light sources, and, in response, generates a feedback signal to adjust the output voltage of the inverter DC voltage.

In General, in another aspect of the invention, the exciter supplies current to the multiple light sources. The exciter includes the inverter DC voltage and the control device. The inverter DC voltage is suitable for receiving the first DC voltage and output the output voltage. The output voltage causes the current to flow through the light sources. The control device is designed to control the current flowing through the portion of the light sources in response to the control signal. The control signal produced by the inverter DC voltage.

In many embodiments, the control device includes a pulse width modulator that controls the current flowing through the portion of the light sources, by shunting current to bypass one or more of the light sources in response to the control signal�tion. In one embodiment of the Converter DC voltage includes a flyback Converter. The control signal is produced by winding of the transformer in the flyback Converter. In another embodiment of the Converter DC voltage includes a buck Converter. The control signal produced by the winding of the inductor in the step-down Converter.

The pathogen may include a feedback device designed to measure current and, in response, controls the switching operation of the inverter DC voltage.

Used in this description for purposes of this disclosure, the term "LED" should be understood in the sense of including any electroluminescent diode or other type of carrier injection/transport, which is capable of generating radiation in response to an electrical signal. Thus, the term LED includes, but without limitation, various structures based on semiconductors that emit light in response to current, light emitting polymers, organic light emitting diodes (asid), electroluminescent strips, etc., In particular, the term LED refers to light-emitting diodes of all types (including semiconductor and organic light emitting diodes), which�s can be used to generate radiation in one or more of the infrared spectrum, ultraviolet spectrum and different sections of the visible spectrum (generally including the emission wavelength from about 400 nanometers to about 700 nanometers). Some examples of LEDs include, but are not limited to, various types of infrared LEDs, ultraviolet LEDs, red LEDs, blue LEDs, green LEDs, yellow LEDs, amber LEDs, orange LEDs, and white LEDs (discussed further below). It should also be understood that the LEDs can be configured and/or controlled to generate radiation having different bands (for example, the values of full width at the level of half-maximum or FWHM) for a given spectrum (e.g., narrow band, broad band), and a variety of dominant wavelengths within the General categorization of colors.

For example, one implementation LED designed to generate essentially white light (e.g., white LED) may include a number of dyes, which respectively emit different spectra of electroluminescence that are mixed together with the formation of the essentially white light. In another implementation, the white light LED may be associated with a phosphor material that converts the electroluminescence having a first spectrum to a different second spectrum. In one example of this implementation, electroluminescence having a relatively short wavelength� and narrow-band spectrum, "pumps" the phosphor material, which, in turn, emits longer wave having a wider range.

It should also be understood that the term LED does not limit the physical and/or electric packaging type LED. For example, as discussed above, an LED may refer to a single light emitting device having multiple dyes, which are intended for the respective radiation of different spectra of radiation (e.g., which may be or may not be under individual control). In addition, the LED may be associated with phosphorus, which is regarded as an integral part of the LED (for example, some types of white LEDs). In General, the term LED may refer to packaged LED, unpackaged LED, LED surface mount, LED in the form of crystals on the Board, the LED is mounted in a T-shaped package, LED in a radial package, LED power unit LED, which includes a particular shell and/or optical element (e.g., a diffusing lens), etc.

The term "light source" should be understood in respect of any one or more of a variety of radiation sources, including, but without limitation, the sources based on LEDs (which includes one or more LEDs as defined above), incandescent sources (e.g., incandescent, halo�enny lamps) fluorescent sources, phosphorescent sources, gas discharge sources of high intensity (e.g., lamp-based sodium vapor, mercury vapor and metal halide), lasers, other types of electroluminescent sources, bioluminescent sources (e.g., fire), sociallyessential sources (e.g., gas lamps, carbon arc radiation sources), photo-luminescent sources (e.g., gas discharge sources), cathodeluminescence sources using electronic satiation, galvanoplastia sources, crystallochemistry sources, chinauniversity sources, thermoluminescent sources, triboluminescent sources, sonoluminescent sources, radio-luminescent sources, and luminescent polymers.

The light source may be designed to generate electromagnetic radiation in the visible spectrum, outside the visible spectrum, or combinations thereof. Therefore, the terms "light" and "radiation" are used herein interchangeably. Additionally, the light source may include as an integral part of one or more filters (e.g., color filters), one or more lenses or other optical components. In addition, it should be understood that the light sources can be adapted for different areas�TEI application including, but without limitation, indication, display and/or lighting. "Source of illumination" is a light source, specifically designed to generate radiation having a sufficient intensity to effectively illuminate the internal and external spaces. In this context, "sufficient intensity" means sufficient radiation power in the visible spectrum generated in the space or environment (the unit "lumens" often is used to Express the total light output of the light source in all directions with respect to the radiation power or "luminous flux") to provide ambient illumination (i.e., light that may be perceived indirectly and which, for example, can be reflected from one or more different intermediate surfaces before it is fully or partially accepted).

The term "spectrum" should be understood in respect of any one or more frequencies (or wavelengths) of radiation produced by one or several light sources. Accordingly, the term "spectrum" refers to frequencies (or wavelengths) not only in the visible range, but also frequencies (or wavelengths) in the infrared, ultraviolet and other parts of the electromagnetic spectrum. In addition, this range can have a relatively narrow strip (e.g., FWHM, having, by sheer�stvu, a small number of components of frequency or wavelength) or a relatively wide bandwidth (several frequency components or wavelengths having different relative intensity). It is also clear that this spectrum can be the result of mixing two or more other spectra (e.g., mixing radiation respectively emitted from multiple light sources).

For the purposes of this disclosure, the term "color" is used interchangeably with the term "spectrum". However, the term "color" generally is used to reflect, mainly, the properties of the radiation that is perceived by an observer (although this use is not intended to limit the scope of this term). Accordingly, the terms "different colors" implicitly involve multiple spectra, components having different wavelength and/or band. It is also clear that the term "color" can be used in connection with white and non-white light. The term "color temperature", in General, is used herein in connection with white light, although this usage is not intended to limit the scope of this term. Color temperature essentially refers to a particular color content or shade (e.g., reddish, bluish) of white light. The color temperature of the sample radiation is traditionally characterized according to the temperature�e in degrees Kelvin (K) of the radiator "black body", which emits essentially the same spectrum as the sample radiation. The color temperature of the radiator "black body", in General, are in the range of about 700 degrees K (which is generally considered the first visible to the human eye) to over 10,000 degrees K; white light, in General, is perceived at color temperatures above 1500-2000 degrees K. lower color temperature in General indicate white light having a more significant red component or a "warmer feel," while higher color temperatures generally indicate white light, having a more significant blue component or a "cooler feel". By way of example, fire has a color temperature of approximately 1,800 degrees K, the traditional incandescent light bulb has a color temperature of approximately 2848 degrees To dawn lighting has a color temperature of approximately 3,000 degrees K, and cloudy day the sky has a color temperature of approximately 10,000 degrees K. a Color image observed in white light having a color temperature of approximately 3,000 degree K has a relatively reddish tone, whereas the same color image observed in white light having a color temperature of approximately 10,000 degrees K has a relatively bluish tone.

The term "lighting unit" is used�isoamsa in this description to refer to the device includes one or more light sources of the same or different types. A given lighting unit may have any of various mounting configurations for the source(s) of light, layouts and shapes of the shell/chassis and/or configurations of the electrical and mechanical connection. Additionally, a given lighting unit optionally may be associated with (e.g., include, be connected to and/or packaged together with) various other components (e.g., control circuit) associated with the operation of the source(s) of light. "The lighting unit based on the LED" refers to a lighting unit that includes one or more light sources based on LEDs, as discussed above, alone or in conjunction with other light sources, not on the basis of the LED. "Multi-channel" lighting unit refers to a lighting unit based on LED or not on the basis of LED, which includes at least two light sources, designed, respectively, to generate different spectrums of radiation, and range of each individual source can be called "channel" multi-channel lighting unit.

It should be understood that all combinations of the foregoing concepts and additional concepts discussed in greater detail below (provided such concepts neprotejat each other) are considered as part disclosed in this description of the subject invention. In particular, all combinations of the claimed invention, is shown at the end of this disclosure are considered part disclosed in this description of the subject invention. It should also be understood that terminology explicitly employed in this description, which can also be used in any disclosure incorporated by reference should be understood in the sense that is most consistent with the particular disclosed in this description of concepts.

Brief description of the drawings

In the drawings, similar symbols in the General case refer to the same parts in the different figures. In addition, the drawings are not always true to scale, and in the General case, the emphasis is on the illustration of the principles of the invention.

Fig. 1 is a functional block diagram of the lighting unit, according to various embodiments of the invention.

Fig. 2 - illustration of a first embodiment of the lighting unit.

Fig. 3 is an illustration of one embodiment of the downconverter.

Fig. 4 is an illustration of a second embodiment of the lighting unit.

Fig. 5 is an illustration of a third embodiment of the lighting unit.

Detailed description

The applicants have identified and realized that it would be preferable to provide an independent and effective regulation of the current through �DIN dual channel exciter LED, while leaving the current in the unregulated channel constant. In view of the above various options for implementation and realization of the present invention are designed to provide a voltage Converter DC layout control to control the current supplied to at least one of the two channels, in response to the control signal produced by the inverter DC voltage.

Fig. 1 shows a functional block diagram of the lighting unit 100. The lighting unit 100 includes an exciter 110 and the channels of the first through N-th sources 120-1 to 120-N of the light, for example light emitting diodes (LED). In one exemplary arrangement of light sources in channels with the first through N-th sources 120-1 to 120-N are light LEDs (LED).

In addition, at least one light source in each channel has a different color or a different color temperature than the at least one light source in each of the other channels. In some embodiments, all the light sources in each channel have a different color or a different color temperature than the light sources in each of the other channels. In an exemplary embodiment, the implementation may exist two channels and the first channel may include a "white" light sources (e.g. LED), and the second channel may include non-white "painted" (n�example, red) light sources (e.g. LEDs). Possible many of these implementation options. In one embodiment of implementation, N=2, and the first and second channels sources 120-1 and 120-2 light connected in series with each other.

The causative agent 110 includes a Converter 130 voltage AC/DC Converter 140 DC voltage, the device 160 current control, the sensor 170, the display 180 current and the controller 190 feedback. In some embodiments, the pathogen can enter the DC voltage (for example, from an external rectifier), in which case the Converter 130 voltage AC/DC can be eliminated. In some embodiments, the implementation, in particular, it is possible to eliminate the sensor 170.

According to variants of implementation, providing for its availability, the Converter 130 voltage AC/DC adapter converts the AC voltage, for example 120 V, DC voltage and may include an input filter and rectifier voltage.

The inverter 140 DC voltage converts the DC voltage (for example, delivered from Converter 130 voltage AC/DC) to the desired voltage level for the excitation channels from the first to the N-th sources 120-1 to 120-N of St�TA. Preferably, the Converter DC voltage may include two stages, comprising: a flyback Converter as the first stage or input stage which converts the first DC voltage into a second DC voltage; and a "step-down" Converter as a second stage or output stage that converts the second DC voltage into an output DC voltage.

The device 160 control takes the current and controls the current output from the Converter 140 DC voltage to the channels of the first through N-th sources 120-1 to 120-N of the light. In particular, the device 160 current control takes the signal 175 of the control current received from the Converter 140 DC voltage and, in response to it, controls the current through one or more of the channels from the first to the N-th sources 120-1 to 120-N of the light. In a preferred arrangement, the device current control includes switch type pulse-width modulator (PWM) provided to the light source, which are necessary to achieve the desired lighting effect of the lighting unit 100.

According to variants of implementation, which would provide for the availability, sensor 170 perceives heat or light generated(th) channels from the first to the N-th source�in 120-1 - 120-N of the light and generates a signal 185 feedback to the controller 190 feedback to adjust the DC voltage delivered from Converter 140 DC voltage, to maintain the desired lighting effect by means of the lighting unit 100 over the lifetime of the components, changes in environmental conditions, etc.

The monitor 180 current monitors or measures the current through the channels of the first through N-th sources 120-1 to 120-N of the light and generates a signal 195 from the current measurement to the controller 190 feedback.

The controller 190 feedback takes the signal from the current measurement from the monitor 180 current and, in response generates one or more control signals to the inverter 140 DC voltage to adjust the output voltage of the inverter 140 DC voltage. Preferably, the feedback circuit controller 190 feedback current maintains the current through the channels with the first through N-th sources 120-1 to 120-N of the light and, consequently, the level of the lighting unit 100 is a constant for any change in input voltage or load.

In the lighting unit 100 is available for a number of variables to achieve the desired lighting effect: selecting a light source (i.e., a number and a color temperature of light sources in channels with the first through N-� sources 120-1 - 120-N of light); selection and a number of light sources driven device 160 current control; internal and output voltage of the inverter 140 DC voltage; and a mechanism for signal 175 control in the inverter 140 DC voltage, all of which provide a tool that can be adjusted or determined to provide the required excitation current for channels with the first through N-th sources 120-1 to 120-N of the light. After identifying and planning made the lighting unit 100 lighting effect can be changed or more precisely adjusted by varying or adjusting the internal stress and/or the output voltage of the Converter 140 DC voltage. Voltage(I) can be set by the manufacture to use a specific party or container of light sources (e.g. LED), or can be adjusted via a feedback loop with the sensor 170 to maintain the desired lighting effect with changing environmental conditions and aging, or can be adjusted manually.

Further explanation of the lighting unit 100 described with reference to specific exemplary embodiments of the implementation.

Fig. 2 shows a first variant implementation of the lighting unit 200. The lighting unit 200 includes stir�spruce 210 and the first and second channels sources 120-1 - 120-2 light.

In the lighting unit 200 of the first and second channels sources 120-1 - 120-2 light connected in series with each other. As discussed above with reference to Fig. 1, in one embodiment of the light sources are LEDs. In addition, preferably, at least one light source in each channel has a different color or a different color temperature than the at least one light source in each of the other channels. In some embodiments, all the light sources in each channel have a different color or color temperature than all the light sources in each of the other channels. In an exemplary embodiment of the light sources in the first channel 120-1 are "white" light sources (e.g., white LEDs), and light sources in the second channel 120-2 are non-white "colored (e.g., red) light sources (e.g. red LED). Possible many of these implementation options.

The causative agent 210 includes a transmitter 230 voltage AC/DC flyback Converter 240, the block 244 of the initiation of the return stroke, the block 246 management of reverse swing, flyback block 248 feedback buck Converter 245, the switch 260 type pulse-width modulator (PWM), resistor 280 current measurement and the block 290 control and excitation �Vice versa communication downconverter.

The inverter voltage 230 AC/DC accepts the input AC voltage from input 205 of AC power and converts the AC voltage into a first DC voltage. The inverter voltage 230 AC/DC may include an input filter and rectifier.

Flyback Converter 240 includes a flyback transformer 242, a switching device, a diode and a capacitor. Flyback Converter 240 comprises a first stage or input stage of the Converter DC voltage of the exciter 210. Flyback Converter 240 receives the first DC voltage from Converter 230 voltage AC/DC current and outputs the second DC voltage, which can be adjusted by proper selection of the coefficients of transformation in the flyback transformer 242 and operations feedback and switching control unit 244 of excitation reverse, block 246 management of stroke and flyback block 248 feedback. In some embodiments, a flyback Converter 240 may provide a correction factor active power supply input line, i.e., the load at the input 205 of the alternating current. In some embodiments, osushestvlenie� flyback Converter 240 may also provide protective isolation between the input 205 of the AC and the consumer or light sources in channels 120-1 and 120-2. In other respects, the configuration and operation of flyback converters are well known and will not be described in this document.

Buck Converter 245 contains the second stage or output stage of the Converter DC voltage of the exciter 210. Buck Converter 245 receives the second DC voltage from a flyback Converter 240 and generates the output voltage which causes a current to flow through the first and second channels sources 120-1 and 120-2 of the world.

Fig. 3 shows a schematic diagram of one embodiment of the step-down Converter 300, which can be used in the lighting unit 200. Buck Converter 300 includes a device 310 switch (e.g. a transistor such as a switching field-effect transistor (FET)), a diode 320, the coil 330 inductance and, optionally, a second coil 520 inductance, which inductance is connected with the coil 330 inductance. The duty cycle of the device switch 310 is controlled by the signal 255 control step-down Converter, which is produced by the block 290 control and excitation feedback downconverter that will be explained in more detail below. Explanation an optional second coil 520 inductance will be given below with reference to Fig. 5. In other attitud�deposits of the configuration and operation of step-down converters are well known and will not be described in this document.

Resistor 280 current measurement measures the total current through the first channel sources 120-1 light and produces a signal current measurement on the block 290 control and excitation feedback downconverter. In response to the measuring signal of the current block 290 control and excitation feedback downconverter 255 generates a signal control step-down Converter, which, for example, controls the operating cycle of the device 310 in the step-down switching Converter 245. This, in turn, allows to control the current through the first channel sources 120-1 light. For example, the block 290 control and excitation feedback may include an operational amplifier or a comparator that compares the signal from the current measurement with the desired value and, in response, adjusts the signal 255 control step-down Converter. In some embodiments, the resistor current measurement can be connected on the upper side between the output voltage down Converter 245 and light sources, and not between the light sources and the return voltage (e.g., ground). In some embodiments, may be provided other link current measurement is connected in series to the resistor 280 measure current.

Nominally, the duty cycle step-down pulse adjustment�Torah 245 is set equal to the ratio of output voltage to the second DC voltage. In a preferred arrangement, the control loop comprising measuring resistor 280, the block 290 control and excitation feedback buck Converter and buck Converter 245, supports the full current through the first channel sources 120-1 of light is constant for any change of the first DC voltage or the load. Preferably, this arrangement enables to provide an adjustable current through the light sources in a relatively wide range of the first DC voltage.

In the lighting unit 200 switch 260 PWM is a bipolar transistor, but in some embodiments it is possible to use other switching device. The switch 260 PWM connected in parallel to the light sources of the second channel of light sources 120-2 to periodically shunt or to pass through a current which otherwise would flow through the second channel sources 120-2 light, in response to a signal 275 management. Changing the duty cycle of the switch 260 PWM, regulate the average current through the second channel sources 120-2 light. This, in turn, allows you to adjust the average amount of light produced by the second channel sources 120-2 light, and, thus, to adjust full intensity and color of light produced by the lighting unit 200. In some� embodiments, switch PWM can be connected on the upper side of the serial link, in parallel to the first channel sources 120-1 light and not the second channel sources 120-2 light. In the General case, the switch 260 PWM can be connected in parallel to any choice of light sources that are necessary to achieve the desired lighting effect.

In one particular arrangement in the lighting unit 200 of the secondary winding of the flyback transformer 242 is used to provide signal 275 to control the switch 260 PWM. To achieve the desired lighting effect, you can adjust a number of variables or parameters of the lighting unit 200. Choice of light sources (for example, the quantity and the color temperature of "white" light sources (e.g. LED) of the first channel 120-1 and light sources 120-2 of the second channel having a different color or a different color temperature); switch location 260 shim; a second DC voltage; the transformation ratio of flyback transformer 242 provide a tool that can be adjusted or determined to provide a control signal to the switch 260 PWM. After identifying and planning the lighting effect can be changed or more precisely adjusted by varying or adjusting the level of the second DC voltage. The level of the second DC voltage can �ustanavlivate in the manufacture to use a specific party or container of light sources (for example, LEDs).

Although not shown in Fig. 2, the level of the second DC voltage can be adjusted via a feedback loop with a temperature sensor and/or light (for example, the sensor 170 shown in Fig. 1) to maintain the desired lighting effect with changing environmental conditions and aging or it can be adjusted by the user. This adjustment feedback may occur either in the primary or in the secondary (isolated) circuit, a flyback transformer 242.

Fig. 4 shows a second variant implementation of the lighting unit 400, which includes the causative agent 410. The lighting unit 400 is identical to a lighting unit 200, except that the switch 260 in PWM lighting unit 400 is controlled by the signal 475 management, which is produced in the primary winding of a flyback transformer 242.

Fig. 5 shows a third embodiment of the lighting unit 500, which includes the causative agent 510. The lighting unit 500 is identical to a lighting unit 200, except that the switch 260 in PWM lighting unit 500 is controlled by a signal 575 administration, which is produced in the winding of the step-down Converter 245, for example in the winding 520, shown in Fig. 3.

Although this document has been described and illustrated several variations�tov embodiment of the invention, specialists in this field of technology can offer a variety of other means and/or structures for performing the functions and/or obtaining the results and/or one or more of those described in this document advantages, and each of the variations and/or modifications is deemed consistent with the scope described in this document variants of implementation of the invention. In the General case, specialists in the art should understand that everything described in this document, parameters, dimensions, materials and configurations are exemplary and that actual parameters, dimensions, materials and/or configurations will depend upon the specific application or applications of the principles of the invention. Specialists in this field of technology can offer without using anything but ordinary experimentation, numerous equivalents described herein specific embodiments of the invention. Therefore, it should be understood that the above variants of the implementation presented solely by way of example, and that, within the scope of the following claims and its equivalents, variants of the invention can be implemented in practice, if other is not particularly described and declared. Embodiments of the invention the present disclosure relate to each separate �written in this document are based system, article, material, kit and/or method. In addition, any combination of two or more such features, systems, articles, materials, kits and/or methods, if such features, systems, articles, materials, kits and/or methods do not contradict each other, is included in the scope of the invention the present disclosure.

All the definitions and data used in this description, should be understood to control over dictionary definitions, definitions in documents incorporated by reference and/or ordinary meanings of certain terms.

The use of the names of the elements in the singular in the description and the claims, unless expressly indicated to the contrary, should be understood in the sense of "at least one".

The expression "and/or" used in the description and the claims, should be understood to mean "either or both" of the United way of the elements, i.e., elements that appear together in some cases, are present separately in other cases. Multiple elements listed with "and/or" should be regarded in the same way, i.e., "one or more" from the United way of the elements. Optionally may include other elements than the elements specifically identified by the use of "and/or" associated or not associated�s with specified elements. Thus, in the order of non-restrictive example, reference to "A and/or B", when used in conjunction with a language that admits of different interpretations, such as "containing" can refer, in one embodiment of implementation, only to A (optionally including elements other than B); in another embodiment, the implementation is only to B (optionally including elements other than A); in yet another embodiment, the implementation of both A and B (optionally including other elements); etc.

Used in the description and the claims, the word "or" should be understood in the same meaning as "and/or" as defined above. For example, when separating items in the list, "or" or "and/or" should be interpreted in the inclusive sense, i.e. to include at least one, but also the inclusion of more than one of a number or list of elements and, optionally, additional items not listed. Only the terms directly identified in a restrictive sense, such as "only one" or "exactly one of," or, when used in the claims, "comprising", provide for the inclusion of exactly one element of a number or list of elements. In the General case used in this document, the term "or" should be interpreted only as indicating usaemail�sponding alternatives (i.e. "one or the other but not both") when preceded by terms of exclusivity, such as "either", "one", "only one" or "exactly one of". "Consisting essentially of", when used in the claims must be understood in the usual sense used in the field of patents.

Used in the description and the claims the expression "at least one", in relation to the list of one or more elements, should be understood in the sense of at least one element selected from any one or more elements in the list elements, not necessarily including at least one of all items specifically listed in the list of elements and not excluding any combinations of elements in the list elements. This definition also provides that, optionally, may contain elements other than the items specified in the list of elements to which the phrase "at least one" associated or not associated with the specified elements.

Any symbols or other symbols that are used in parentheses in the claims, are for convenience only and in no way are intended to limit the scope of the invention.

Also it should be understood that, unless expressly stated otherwise, any asserted � this document methods, which include more than one step or act, the order of the steps or actions of a method is not required to be limited to the order in which the stages or steps of the method mentioned.

In the claims and in the above description of the invention all transitional expressions, such as "containing", "including", "carrying", "having", "contains", "providing", "restraint", "comprising", etc. should be understood to encompass different interpretations, i.e. in the sense of "including, but without limitation". Only the transitional phrase "consisting of" and "consisting essentially of" are strict or partially strict transitional expressions, respectively.

1. Multi-channel lighting apparatus, comprising:
the first channel of the first light-emitting devices (LEDs) connected in series with each other,
the second channel of the second LED is connected in series with each other, wherein at least one of the mentioned second LED includes at least one of a different color and a different color temperature than at least one of the first mentioned LED, and
the causative agent for the initiation of the mentioned first and second channels of the LED, wherein the exciter includes:
flyback Converter, configured to receive the first DC voltage and output the second example�tion DC,
buck Converter, configured to receive the mentioned second DC voltage and generating the output voltage which causes a first current to flow through said first LED channel and the second current to flow through said second channel LED,
pulse width modulator, made with the possibility of the mentioned second control current, the current through said second LED channel, in response to the control signal, wherein the control signal for controlling the mentioned second current flowing through said second channel LED is made from winding the coil in either a flyback Converter or down-Converter, and a feedback device, configured to measure at least one of the first mentioned current and the second current and, in response, controls the switching operation of the step-down Converter.

2. The device according to claim 1, wherein the coil winding inductance, which is generated from the control signal, is the primary winding of the transformer in the flyback Converter.

3. The device according to claim 1, wherein the coil winding inductance, which is generated from the control signal, a secondary winding of the transformer in the flyback Converter.

4. The device according to claim 1, wherein winding the cat�Ki inductance, from which is generated the control signal is winding inductor step-down Converter.

5. The device according to claim 1, wherein at least one of the mentioned first LED emits a white light and wherein at least one of the mentioned second LED emits non-white with a light color.

6. The device according to claim 1, in which referred to the first channel of the first LED is connected in series with said second channel of the second LED.

7. The device according to claim 1, further comprising a temperature sensor made with the possibility of perception of the temperature of at least one of the first and second LED and, in response, generating a feedback signal to adjust the output voltage.

8. The device according to claim 1, further comprising a light sensor adapted to detect light produced by the mentioned first and second LED and, in response, generating a feedback signal to adjust the output voltage.

9. Multi-channel lighting apparatus, comprising:
the first group of light sources, connected in series with each other,
the second group of light sources, connected in series with each other, wherein said first group of light sources connected in series with said second group of light sources, at least about�Ying from light sources mentioned second group has at least one of a different color and a different color temperature, than at least one light source referred to the first group,
the causative agent for the initiation of the mentioned first and second groups of light sources, wherein the exciter includes:
Converter DC voltage, configured to receive the first DC voltage and output the output voltage, and output voltage causes a first current to flow through said first group of light sources and a second current to flow through said second group of light sources, and
a control unit that is arranged to control the mentioned second current flowing through said second group of light sources in response to the control signal,
in this case, the control signal for controlling the mentioned second current flowing through said second group of light sources is produced by the inverter DC voltage.

10. The device according to claim 9, wherein the control device contains a pulse width modulator that controls mentioned second current flowing through said second group of light sources, mentioned by shunting a second current to bypass one or more of the mentioned second light sources in response to the control signal.

11. The device according to claim 9, wherein the voltage Converter DC s�I flyback Converter in which the control signal for the mentioned second control current, current through said second group of light sources is produced by winding of the transformer in the flyback Converter.

12. The device according to claim 9, in which the Converter DC voltage includes a buck Converter and in which the control signal for controlling the mentioned second current flowing through said second group of light sources is produced by the winding of the inductor in the step-down Converter.

13. The device according to claim 9, in which the agent further comprises a feedback device, configured to measure at least one of the first mentioned current and the second current and, in response, controls the switching operation of the inverter DC voltage.

14. The device according to claim 9, in which the agent further comprises a sensor made with the possibility of perception of one of temperature and light emitted by at least one of the mentioned first and second light sources and, in response, generating a feedback signal to adjust the output voltage of the inverter DC voltage.

15. Exciter for supplying current to the multiple light sources, wherein the exciter includes:
Converter DC voltage, made with the possibility of PR�EMA first DC voltage and output the output voltage, moreover, the output voltage causes the current to flow through the light sources, and
a control unit that is arranged to control the current flowing through the portion of the light sources in response to the control signal, wherein the control device contains a pulse width modulator that controls the current flowing through said portion of the light sources, by shunting current to bypass one or more of the light sources in response to the control signal,
in this case, the control signal for controlling the current flowing through said portion of the light sources is performed by the inverter DC voltage.

16. Exciter according to claim 15, in which the Converter DC voltage includes a flyback Converter in which the control signal is produced by winding of the transformer in the flyback Converter.

17. Exciter according to claim 15, in which the Converter DC voltage includes a buck Converter and in which the control signal is produced by the winding of the inductor in the step-down Converter.

18. Exciter according to claim 15, further comprising a feedback device, configured to measure the current and, in response, controls the switching operation of the inverter DC voltage



 

Same patents:

FIELD: electricity.

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

Illumination device // 2554080

FIELD: electricity.

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

FIELD: electricity.

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

FIELD: electricity.

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

Led circuit // 2550496

FIELD: electricity.

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

FIELD: electricity.

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

FIELD: electricity.

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: electricity.

SUBSTANCE: invention relates to lighting engineering. The device comprises a current controller configured to receive dimming input signal, which is a variable showing the percentage of maximum excitation current supplied to LED load and to output a signal with pulse-width modulation (PWM signal) and reference voltage, a current transducer configured to receive voltage supply and to ensure output current and a shunt switch connected to the current controller and current transducer and between the current controller and LED load. The shunt switch is configured to divert at least part of the output current from the current transducer and from delivery to the LED load when the shunt switch is conducting, at that the shunt switch is not conducting when the dimming input signal shows that the percentage exceeds the threshold level.

EFFECT: improving efficiency of LED current control based on dimming input signal.

14 cl, 3 dwg

FIELD: electricity.

SUBSTANCE: invention is related to a light fixture containing light sources placed at least in the first group of light sources and in the second light sources, at that the above first and second groups of light sources are controlled separately. Light-collecting facilities collect light from the first group of light sources and convert it to beams of light sources. The light sources and light-collecting facilities are placed in the body emitting beams of the light sources. The body includes a coating containing at least one dissipating area and at least one non-dissipating area. The dissipating area receives light generated by the second group of light sources and dissipates it. Beams of the light sources pass non-dissipating areas without light dissipation.

EFFECT: development of new design for the light fixture.

13 cl, 11 dwg

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. The lamp unit (100) with plurality of light sources (120a-e) is controlled by the control unit (110) designed to control a sequence of excitation settings (Sa-e) for the plurality of light sources based on switching signal (Sk) delivered to the lamp unit. The control unit is made so that it sets valid excitation settings in the preset way depending on time elapsed between the signal deactivation and repeated activation. Within limits of the first preset time interval the subsequent excitation setting is used for the light sources, upon the second preset time interval the previous excitation setting is used for the light sources, and within limits of the intermediate time interval between ending of the first preset time interval and ending of the second preset time interval the preset excitation setting is used.

EFFECT: improved quality of colour settings for the lighting system.

15 cl, 6 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.

3 dwg

FIELD: physics.

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

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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