Method and device for increase of range of adjustment of illumination of solid-state lighting fixtures

FIELD: electricity.

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

 

AREA of TECHNOLOGY

The present invention relates to solid-state lighting devices. In particular, the various described methods and devices of the invention are selective increase of the adjustment ranges of the illumination solid-state lighting devices using signals of power regulation, calculated on the basis of determining the phase angle of the dimmer.

The LEVEL of TECHNOLOGY

The technology of digital or solid-state illumination, i.e. illumination based on semiconductor light sources, such as light-emitting diodes (LEDs), represents a competitive alternative to traditional fluorescent lamps, discharge lamps high intensity and filament lamps. Functional advantages and benefits of LEDs are efficient energy conversion and optical efficiency, durability, low maintenance costs and many others. Latest achievements in led technology have given effective and reliable broadband light sources, which allow to realize a lot of lighting effects in various applications. Some of the devices that implement these sources comprise a lighting module comprising one or more LEDs capable of forming different color�the one for example, red, green, and blue, and a processor to control each of the output signals of the LEDs in order to generate a variety of colors and light effects color changing, for example, as described in detail in U.S. Patents No. 6016038 and 6211626, incorporated herein by reference. Led technology includes a powered AC line voltage lighting white light, for example, ESSENTIALWHITE series, supplied by Philips Color Kinetics. These devices can have regulation of light using the technology of the dimmer, trailing edge, such as dimmers extra-low voltage (ELV) for mains voltages of 120 VAC.

Dimming ballasts are used in many applications of lighting devices. Traditional dimmers work well with incandescent lamps (conventional or halogen). However, problems arise with other types of electron tubes, including compact fluorescent lamp (CFL), low-voltage halogen lamps with the use of electrical transformers and lamps solid state lighting (TTO), such as light-emitting diodes (LEDs) and organic LEDs (osid). Regulation of light for low voltage halogen lamps with the use of electrical transformers, in �astnosti, can be done with a special dimming ballasts, such as the ELV dimmer or resistive-capacitive (RC) dimming ballasts that operate satisfactorily with loads that have input circuit of a power factor corrector (PFC).

Traditional dimmers cut the portion of each pulse shape of the signal line voltage and pass the remainder of the pulse shape in the lighting device. The dimmer on the leading edge or the cut-off phase on the leading edge cuts the leading edge of the pulse shape of the voltage signal. Dimmer trailing edge or with a cut-off phase on the falling edge trims the trailing edge of the pulse shape of the voltage signal. Electronic loads, such as shapers power the led, usually work better with a dimmer trailing edge.

Devices with filaments and other traditional resistive lighting devices in a natural way accurately respond to a clipped sinusoidal waveform generated by the dimmer with a cut-off phase. In contrast, led and other solid state lighting load when installed on such a dimmer with a cut-off phase can lead to several problems such as propagan� the bottom false triggering of the triac, the problem of minimum load, flickering top and big jumps of light output. In addition, a minimum light output of solid state lighting load at least install a dimmer relatively high. For example, the light output of the led at low setting of the dimmer can be 15-30 percent of the light output at the maximum setting, which may be undesirable for high light output at low setting. The problem of high light output is further exacerbated by the fact that the spectral response of the human eye is very sensitive at low light levels, making the light output seems to be even higher. Thus, there is a need to reduce the light output of solid state lighting load at the low setting of the corresponding dimmer.

Summary of the INVENTION

The present description relates to methods and devices of the invention to reduce the light output of solid state lighting load at low settings phase angle or level of the control light dimmer. Generally, in one aspect, a system for controlling the level of light output of solid state lighting load includes a detector phase angles and converters�ü power. Detector phase angles made with the possibility of measuring the phase angle of the dimmer based on the rectified voltage from the dimmer and determining the signal power control based on the comparison of the measured phase angle with a predetermined first threshold. Power Converter is arranged to supply the output voltage to the solid state lighting load. Power Converter operates in the mode without feedback based on the rectified voltage from the dimmer when the measured phase angle larger than the first threshold, and operates with a feedback based on the rectified voltage from the dimmer and a specific control signal of the power detector with phase angles when the measured phase angle less than the first threshold.

In another aspect, a method of throttling power controls the light output of solid state lighting load using a power Converter connected to the dimmer. This method includes measuring the phase angle of the dimmer, appropriate level of regulation of light, set in the dimmer; when the measured phase angle is greater than the first threshold regulation of the light - emitting control signal m�, a, having first fixed installation power and the modulation level of light output of solid state lighting load based on the magnitude of the output voltage of the dimmer; and when the measured phase angle that is less than the first threshold regulation of the light - emitting control signal power, with the installation of power, which is defined as a function of the measured phase angle and the modulation level of light output of solid state lighting load based on the magnitude of the output voltage of the dimmer and a certain power settings.

In another aspect, the device comprises an led load, the circuit for measuring phase angle and power Converter. LED load has a light output corresponding to the phase angle of the dimmer. The scheme of measurement of phase angle is arranged to measure the phase angle of the dimmer and alarm power control signal with pulse-width modulation (PWM) PWM output, wherein the signal power control PWM has a duty cycle determined based on the measured phase angle of the dimmer. Power Converter configured to receive the rectified voltage from the dimmer and signal power control PWM with a plan for the measurement phase at�La and feed the output voltage to the led load. The scheme of measurement of the phase angle sets the duty cycle of the signal power control PWM with a fixed high percentage when the measured phase angle exceeds a high threshold, providing the definition of the power Converter output voltage based on the magnitude of the rectified voltage. The scheme of measurement of the phase angle sets the duty cycle of the signal power control PWM with a variable percentage, calculated in the form of a predetermined function of the measured phase angle when the measured phase angle is less than high threshold, providing the definition of the power Converter output voltage signal-based power control with PWM in addition to the magnitude of the rectified voltage.

Used here for the purposes of the present invention, the term LED (led) should be considered including electroluminescent diode or other type of system on the basis of charge injection/transport capable of generating radiation in response to an electrical signal. Thus, the term LED includes, among other things, various semiconductor structures that emit light in response to current, light emitting polymers, organic light emitting diodes (asid), electroluminescent tape, etc. In particular, the term LED refers to light-emitting diodes of all types (including semiconductor and organic light emitting diodes) that can be configured to generate radiation in one or more regions of the spectrum infrared, ultraviolet, and various portions of the spectrum of visible radiation (typically includes wavelengths from approximately 400 nanometers to approximately 700 nanometers). Some examples of LEDs include, among other things, various types of infrared LEDs, ultraviolet LEDs, red LEDs, blue LEDs, green LEDs, yellow LEDs, amber LEDs, orange LEDs, and white LEDs (further discussed below). It should also be understood that the LEDs can be arranged or controlled to generate radiation having various bandwidths (e.g., full width at half maximum or FWHM) for a given spectrum and a variety of dominant wavelengths within the General classification of color.

For example, one implementation of an led, is arranged to generate almost white light (e.g., led lighting device is white light) may include a number of crystals, respectively, emitting different spectra of electroluminescence, which are mixed with each other with the formation of almost white light. In another implementation, the led lighting device is white light may be associated with crystalline LUMIN�Faure, which converts an electroluminescence having a first spectrum, the second spectrum to another. In another example, this implementation electroluminescence having a relatively short pulse length and spectrum with a narrow bandwidth, "pumps" crystal phosphor which in turn emits radiation with longer pulse having a somewhat broader spectrum.

It should also be understood that the term LED does not limit the type of physical and/or electrical layout of the led. For example, as mentioned above, an led may refer to a single light emitting device having a plurality of crystals which are arranged to respective different emission spectra (e.g., which may or may not be controlled individually). In addition, the led may be associated with a phosphor, which is considered an integral part of the led (for example, some types of white light emitting diodes). Typically, the term LED may refer to corbusierian LEDs, incorporaban LEDs, surface mount diodes, LEDs chip mounting the crystals on the PCB, the LEDs mounted in the T-shaped housing, the LEDs mounted in star-shaped enclosure, the LEDs mounted in the powerful body, the LEDs are� some types of membranes and/or optical element (e.g., light-diffusing lens), etc.

The term "light source" should be considered as relating to any one or more of the plurality of radiation sources, including, inter alia, led light sources (including one or more LEDs, as described above), a light source with a filament (e.g., filament lamps, halogen lamps), fluorescent sources, phosphorescent sources, gas discharge sources of high intensity (e.g., mercury, sodium and metal halide lamps), lasers, other types of electroluminescent sources, bioluminescent sources (e.g., flames), getluminance sources (e.g., surface mesh, radiation sources with carbon arc), photo-luminescent sources (e.g., gas discharge sources), cathodoluminescent sources using electronic satiation, galvanoplastia sources, crystallochemistry sources, chinauniversity sources, thermoluminescent sources, triboluminescent sources, sonoluminescent sources, radio-luminescent sources, and luminescent polymers.

A given light source may be arranged to generate radiation within the visible spectrum, outside the visible spectrum, or in both areas. Therefore, the terms "light�" and "radiation" are used here as synonyms. In addition, the light source may include as an integral component of one or more filters (e.g., color filters), lenses or other optical components. In addition, it should be understood that the light sources can be adapted to use in a variety of applications, including, without limitation, indication, display and/or lighting. "The light source is a light source, which is specially arranged to generate radiation having a sufficient intensity to effectively illuminate an internal or external space. In this case, "sufficient intensity" refers to sufficient radiation power in the visible spectrum generated in the space environment (the unit "lumens" often is used to represent the total light output of the light source in all directions in the values of radiation power or "luminous flux") to create the illumination of the surrounding space (e.g., a light that can be perceived indirectly and which may, for example, be reflected from one or more of the plurality of intermediate surfaces before perceiving a fully or partially).

The term "lighting fixture" is used here to refer to the implementation or placement of one or more WWS�plant installations in a particular form factor, site or building. The term "lighting system" is used here to refer to a device containing one or more light sources of same or different types. Preset lighting system can have any of the plurality of docking devices for the source (sources) of light, configurations and shapes of the jacket and/or configurations of electrical and mechanical connections. Additionally, a given lighting system can be optional associated (e.g., include, be coupled and/or linked together with different other components (e.g., control circuit) in relation to the operation of the source (sources) of light. "Led lighting system" refers to a lighting installation, which includes one or more led light sources, as described above, separately or in combination with other nesuliginami light sources. "Multi-channel" lighting system relates to an led or neverovatnoj lighting system that includes at least two light sources adapted to generate corresponding different spectra of radiation, and range of each particular light source may be called a "channel" multi-channel lighting system.

The term "controller� used here as a rule, to describe the various devices related to the action of one or more light sources. The controller can be implemented in different ways (for example, using dedicated hardware) to perform various functions described in this description. "Processor" is one example of a controller that uses one or more microprocessors that may be programmed using software (e.g., firmware) to perform the various functions described in this description. The controller can be implemented with or without use of the processor and may be implemented as a set of dedicated hardware to perform some functions and a processor (e.g., one or more programmed microprocessors and associated circuits) to perform other functions. Examples of controller components that may be used in various embodiments of the present invention include, inter alia, universal microprocessors, microcontrollers, specialized integrated circuits (ASIC) and field programmable gate array (FPGA).

In various implementations, the processor and/or controller may be associated with one or Bo�its storage of data (usually referred to herein as "storage device", for example, volatile and non-volatile storage device of the computer, such as random access memory (RAM), read only memory (ROM), programmable read only memory (EPROM), erasable programmable read only memory (EPROM), electrically erasable programmable read only memory (EEPROM), a storage device interface universal serial bus (USB), floppy disks, CD-ROMs, optical disks, magnetic tape, etc.). In some implementations, the storage device may be encoded using one or more programs which when run in one or more processors and/or controllers, perform at least some of the described functions. Various data loggers can be embedded in the processor or controller or may be portable so that the one or more stored programs can be loaded into a processor or controller so as to implement various aspects of the present invention described in the present description. The terms "program" or "computer program" are used herein in a generic sense to reference any type of computer code (e.g., software or m�reprogramme), which can be used for programming one or more processors or controllers.

In a network implementing one or more devices associated with the network, can serve as a controller for one or more other devices associated with the network (for example, if you type "master-detail"). In another implementation, the network environment may include one or more specialized controllers that are configured to manage one or more devices associated with the network. Typically, each of the plurality of devices associated with the network may have access to data available in the medium or mediums of data transfer; however, a given device may be "addressable" in the sense that it is performed with the possibility of electoral communication with the network (i.e., receive data from the network and/or data transmission in the network) based, for example, one or more assigned special identifiers (e.g., "addresses").

It should be understood that all the totality of the foregoing concepts and additional concepts that are described more below (provided such concepts are not mutually inconsistent) are taken as part of the described object of the invention. In particular, all the totality of the claimed subject matter of the invention shown in side description considered as a part of the described object of the invention. It should also be understood that uniquely terminology used here, which can also be anywhere in the description, which is incorporated herein by reference it must match the value that is most consistent with the particular concepts described here.

BRIEF description of the DRAWINGS

Various types of drawings the same numbers of positions, as a rule, everywhere are the same or similar parts. In addition, the drawings are not necessarily made to scale, instead, special attention is given to illustrating the principles of the invention.

Fig. 1 is a block diagram which shows an illumination system with adjustable brightness-containing solid state lighting device and the phase detector in accordance with a characteristic variant implementation.

Fig. 2 is a schematic diagram showing the control system of light regulation containing solid state lighting device and the circuit for measuring phase in accordance with a characteristic variant implementation.

Fig. 3 is a graph, which shows the values of the signal power relative to the phase angle of a dimmer in accordance with the characteristic options�the ant implementation.

Fig. 4 is a block diagram showing a process of setting the signal power control for controlling power output of the power Converter in accordance with a characteristic variant implementation.

Fig. 5 is a block diagram showing a process flow of the output power of the power Converter in accordance with a characteristic variant implementation.

Fig. 6A-6C show examples of pulse shape and corresponding digital pulses of a dimmer in accordance with a characteristic variant implementation.

Fig. 7 is a block diagram showing a process of measuring the phase angle of a dimmer in accordance with a characteristic variant implementation.

DETAILED DESCRIPTION

In the following detailed description, for purposes of explanation and not limitation, typical embodiments of describing specific details are described to ensure a complete understanding of the present embodiments. However, the specialist who has received the effect of the present invention, it is obvious that other variants of implementation in accordance with the present invention are within the scope of the attached claims. In addition, descriptions of well-known devices and methods, you can skip�, so they do not interfere with the description of typical embodiments. Such methods and devices are undoubtedly within the scope of the present invention.

Applicants acknowledge and understand that it would be useful to create a device and method for lowering the minimum output light level, which in other cases could be achieved using an electronic transformer with solid state lighting load connected to the dimmer with a cut-off phase.

Fig. 1 is a block diagram which shows an illumination system with adjustable brightness-containing solid state lighting device and the phase angle detector in accordance with a characteristic variant implementation. According to Fig. 1, an illumination system with adjustable brightness 100 includes a dimmer 104 and the rectification circuit 105, which takes the (adjusted) rectified voltage Urect from the mains 101. Supply network 101 can provide different nevirapine input voltage AC, such as 100 VAC, 120 VAC, 230 VAC and 277 VAC in accordance with various implementations. The dimmer 104 is a dimmer with a cut-off phase, for example, which provides quick and easy access� control for brightness cutoff front front (the dimmer the front or rear of the fronts (dimmer, trailing edge) of the pulse shapes of the voltage signal from the network voltage 101 in response to vertical movement of slider 104A. Typically, the magnitude of the rectified voltage Urect is proportional to the level of control luminance, set by the dimmer 104, so a smaller phase angle or the level of regulation of illumination leads to a lower rectified voltage Urect. In the depicted example it is possible to assume that the slider is moved down to lower the phase angle, reducing the amount of light output of solid state lighting load 130, and moves up to increase the phase angle, increasing the amount of light output of solid state lighting load 130.

An illumination system with adjustable brightness 100 further comprises a detector phase angles 110 and power Converter 120. Typically, the detector phase angles 110 measures the phase angle of the dimmer 104 based on the rectified voltage Urect and outputs a control signal to power on the control bus 129 to the power Converter 120. The signal power control may be, for example, a signal with pulse-code modulation (PCM) or other digital signal and may be subject to change between high and low levels in accordance with the working cycle is determined by the detector phase angles 110 based on the measured phase angle. The duty cycle can�t to vary from approximately 100% (e.g., constantly at a high level) to approximately zero percent (for example, to reside at a low level) and includes any percentage between these values for the proper regulation of the installation capacity of the power Converter 120 to control the level of light emitted by the solid state lighting load 130, as described below. For example, the duty cycle of 70 percent means that a rectangular pulse signal power control is at a high level for 70 percent of the pulse period and at a low level for 30 percent of the pulse period.

In various embodiments, power Converter 120 receives the rectified voltage Urect from the rectification circuit 105 and outputs a corresponding DC voltage for powering solid state lighting load 130. Power Converter 120 converts the rectified voltage Urect to another DC voltage based on at least two variables: (1) the magnitude of the output voltage from the dimmer 104 through the rectification circuit 105, for example, specified by dragging the slider 104A, and (2) the setting value of signal power management power generated and issued by the detector phase angles 110 via the control bus 129, for example, installed in with�according to a predetermined function or algorithm described below. In this case, the DC voltage given by the power Converter 120, reflects the phase angle of the dimmer (i.e., the level of regulation of light) applied by the dimmer 104, even at low levels of regulation illuminance below which the traditional system with control of illumination no longer provides an additional reduction of light output of solid state lighting load 130. The transformation function of the rectified voltage Urect to the DC voltage may also depend on additional factors, such as the properties of the power Converter 120, the type and configuration of the solid state lighting load 130 and other requirements on the application and design of various implementations, as will be obvious to experts in this field of technology.

In various embodiments, an illumination system with adjustable brightness 100 provides selective throttling feedback solid state lighting load 130. In other words, the power Converter 120 selectively operates in a mode with feedback or without feedback depending on the phase angle of the dimmer, the measured phase detector 110. In the mode without feedback detector phase angles 110 sets the control signal�implementing capacity of permanent or fixed installation, which fixes the operating point of the power Converter 120. Therefore, the power Converter 120 converts the rectified voltage Urect to the DC voltage on the basis of only the magnitude of the rectified voltage Urect, transmitting a predetermined amount of power from the mains 101 in the solid state lighting load 130. Mode feedback detector phase angles 110 calculates a variable setting of the power control signal power, which dynamically adjusts the operating point of the power Converter 120. Therefore, the power Converter 120 converts the rectified voltage Urect to a DC voltage based on the set power control signal, power, and magnitude of the rectified voltage Urect.

Lighting system with adjustable light 100 may be configured to provide range mode with feedback between higher and lower ranges in the mode without feedback power Converter 120. As discussed in detail below with reference to Fig. 3, the detector phase angles 110 may set the signal power control setting high fixed power when the measured phase angle is above a predetermined first threshold, setting low fixed power when the measured phase angle is below a predetermined second threshold, raschetnoe variable power installation, when the measured phase angle is between the first threshold and the second threshold. For example, when the detector phase angles 110 measures the phase angle is above the first threshold (for example, the first low level light regulation), it sets the control signal power high duty cycle (e.g., 100 percent), and power Converter 120 sets its output power based only on changes in the value of the rectified voltage Urect. Similarly, when the detector phase angles 110 measures the phase angle is below a second threshold (e.g., the second lowest level of regulation is light or zero light output), it sets the signal power control with low duty cycle (e.g., zero percent), and the power Converter 120 is again setting its output power based only on changes in the value of the rectified voltage Urect. When the detector phase angles 110 measures the phase angle is below the first threshold and above a second threshold, it dynamically calculates the duty cycle of the signal power control to reflect the measured phase angle, and power Converter 120 sets its output power based on the estimated business cycle and changes in the value of the rectified voltage Urect. Accordingly, the light output of a solid state lighting load 130 continues relaxed driving.�tsya even at low levels of light regulation, for example, below the first threshold, which in other cases would not have any effect on the light output of traditional systems.

Fig. 2 is a schematic diagram showing the control system of light regulation containing solid state lighting device and the circuit for measuring the phase angle in accordance with a characteristic variant implementation. The main components of Fig. 2 similar components of Fig. 1, although in accordance with an illustrative configuration presents more details regarding the various typical components. Of course, within the scope of the present invention can be implemented in other configurations.

According to Fig. 2, control system light 200 includes a rectification circuit 205, the circuit for determining the phase angles of 210 dimmer (hatched rectangle), power Converter 220 and the led load 230. As stated above in respect of the rectification circuit 105, the rectification circuit 205 is connected to the dimmer (not shown) identified by the input light regulation energized and neutral input light regulation for admission (adjusted) nevirapine voltage from supply network (not shown). In the depicted configuration, the rectification circuit 205 includes four diodes 201-D204, connected between the rectified voltage node N2 and the ground voltage. The rectified voltage node N2 receives (adjusted) rectified voltage Urect and is connected to ground through the filter capacitor C connected in parallel to the rectification circuit 205.

Detector phase angles 210 measures the phase angle of the dimmer (level of regulation of light) based on the rectified voltage Urect and generates a signal to control power from the output of the PWM 219 via the control bus 229 in power Converter 220 to control the action of the led load 230. This allows the detector phase angles 210 selectively adjusting the magnitude of power transmitted from the input to the led load 230 based on the measured phase angle. In depicts a typical embodiment of the signal power control is a PWM signal having a duty cycle determined by the detector phase angles 210 and the corresponding installation of the power delivered to the power Converter 220. In addition, depicted in a characteristic embodiment of the detector phase angles 210 contains the microcontroller 215, which uses pulse shape of the rectified voltage Urect to determine the phase angle of the dimmer and produces a signal power control with PWM using PWM output 219, gir�BNO discussed below.

Power Converter 220 receives the rectified voltage Urect at the rectified voltage node N2 and converts the rectified voltage Urect to the appropriate DC voltage to power the led load 230. Power Converter 220 acts selectively in the mode without feedback (or with a direct link), as described, for example, Lys in U.S. Patent No. 7256554 included in this document by reference, and in the mode of feedback depending on the signal power control PWM supplied to the circuit for determining the phase angles 210. In various embodiments, the power Converter 220 may be, for example, L6562 supplied by the company ST Microelectronics, although you can use other types of power converters or other transformers and/or processors that reside within the scope of the present invention. For example, the power Converter 220 may be a Converter with a fixed off time, power factor correction, single stage, inverting buck Converter, while it can be a Converter of any type with a rated control without feedback.

LED load 230 includes a chain of serially connected LEDs, which are indicated by LEDs 231 and 232, between the output of the inverter�friendly supply 220 and the ground. Control of the magnitude of the load current through the led load 230, and therefore the amount of light emitted by the led load 230, is performed directly by the output capacity of the power Converter 220. Controlling the amount of power output of the power Converter 220 is the magnitude of the rectified voltage Urect and the measured phase angle (the regulation of light) dimmer, measured by the circuit for determining the phase angles of 210.

Fig. 3 is a graph, which shows the values of the signal power relative to the phase angle of a dimmer in accordance with a characteristic variant implementation. According to Fig. 3, the vertical axis shows the installation of the power control signal power, increasing upwards from a low or minimum power settings, and the horizontal axis indicates the phase angle of the dimmer (e.g., as measured by the circuit for determining the phase angles 210), increasing from right to left low or minimal level of regulation is light.

When the circuit for determining the phase angles 210 determines that the phase angle of the dimmer is above a predetermined first threshold indicated by the first phase angle θ1, the duty cycle of the control signal mo�of PWM is set to its maximum setting power (e.g., duty cycle 100%), which fixes the operating point of the power Converter 220. Therefore, the power Converter 220 determines and outputs the power to the led load 230 on the basis of only the values of the rectified voltage Urect. In other words, the power Converter 220 operates without feedback, so only the dimmer with a cut-off phase modulates the power transmitted to the output of the power Converter 220 through the rectification circuit 205. In various embodiments, the first phase angle θ1is the phase angle of the dimmer, wherein the subsequent decrease in the level of regulation of brightness dimmer with other cases does not reduce the light output of the light load 230, which may be, for example, about 15-30 percent of the light output at the maximum setting.

When the circuit for determining the phase angles 210 determines that the phase angle of the dimmer is lower than the first phase angle θ1she starts to adjust the relative duty cycle of the signal power control PWM down from the highest installed capacity for the purpose of lowering the power output of the power Converter 220. Therefore, the power Converter 220 determines and outputs the power to the led load 230 based on the value of the rectified voltage Urect and install m�nosti signal power control with PWM, for example, modulated by the microcontroller 215. In other words, the power Converter 220 operates with feedback using the feedback signal of the power control PWM.

The signal power control PWM decreases in response to decreasing measured phase angle of the dimmer until such time as the measured phase angle reaches a predetermined second threshold, the second phase angle θ2described below. It should be noted that the characteristic curve in Fig. 3 shows a linear pulse width modulation from the maximum installed capacity at the first phase angle θ1to the minimum installed capacity in the second phase angle θ2depicted in the form of a ramp. However, within the scope of the present invention may be installed and nonlinear change. For example, in various embodiments, the nonlinear function of signal power control with PWM may be necessary to create a sense of linearity of the light output of the led load 230 corresponding to the slider control light, as is obvious to a person skilled in the technical field.

When the circuit for determining the phase angles 210 determines that the phase angle of the dimmer has been reduced below the preset second threshold, denoted Deut�m the phase angle θ 2, the duty cycle of the signal power control PWM is set to its minimum setting power (e.g., the duty cycle is zero percent), which fixes the operating point of the power Converter 220. Therefore, the power Converter 220 determines and outputs the power to the led load 230 on the basis of only the values of the rectified voltage Urect. In other words, the power Converter 220 re-runs without feedback, so only the dimmer with a cut-off phase modulates the power transmitted to the output of the power Converter 220 through the rectification circuit 205.

The value of the second phase angle θ2may vary to provide unique benefits for any particular situation or to meet specific application requirements of various implementations, as is obvious to a person skilled in the art. For example, the value of the second phase angle θ2may be the phase angle of the dimmer, which further decreases the power transmitted to the led load 230, may lead to reduce the load below the minimum load requirements of the power Converter 220. In accordance with another variant, the value of the second phase angle θ2may be the phase angle of the dimmer that matches a specified mini�social level of the light output of the led load 230. In various alternative embodiments, the second phase angle θ2can be simply zero, and in this case, the power Converter 220 operates in a mode with feedback using the feedback signal of the power control PWM until such time as the phase angle of the dimmer is reduced to its minimum level (which may be zero or some specified minimum level above zero).

Fig. 4 is a block diagram showing a process of setting the signal power control for controlling power output of the power Converter in accordance with a characteristic variant implementation. Shown in Fig. 4 process can be implemented, for example, by microcontroller 215, shown in Fig. 2, although it can use other types of processors and controllers within the scope of the present invention.

In block S421 phase angle of the dimmer θ is determined by the circuit for determining the phase angles 210. In block S422 is established whether the measured phase angle of the dimmer is greater than or equal to the first phase angle θ1that corresponds to a predetermined first threshold. When the measured phase angle of the dimmer is greater than or equal to the first phase angle θ1(block S422: Yes), the signal�the power control PWM fixed maximum setting (for example, duty cycle 100%) in block S423. The control signal power is transmitted to the PWM power Converter 220 via the control bus 229 in block S430, and the process returns to block S421 to continue measuring the phase angle of the dimmer θ.

When the measured phase angle of the dimmer is not greater than or equal to the first phase angle θ1(block S422: No), in block S424 is established whether the measured phase angle of the dimmer less than or equal to the second phase angle θ2that corresponds to a predetermined second threshold. When the measured phase angle of the dimmer is less than or equal to the second phase angle θ1(block S424: Yes), the signal power control PWM fixed minimal install (for example, the duty cycle is zero percent) in the block S425. The control signal power is transmitted to the PWM power Converter 220 via the control bus 229 in block S430, and the process returns to block S421 to continue measuring the phase angle of the dimmer θ.

When the measured phase angle of the dimmer is not greater than or equal to the second phase angle θ2(block S424: No), the signal power control PWM is calculated in block S426. For example, the relative duty cycle of the signal power control PWM computations can�conducted in accordance with a predetermined function of the measured phase angle of the dimmer, for example, implemented in the form of software and/or firmware-implemented algorithm, executable by the microcontroller 215, to ensure proper installation capacity. The given function may be a linear function, which provides a linearly decreasing relative duty cycles corresponding to the decreasing levels of regulation of illumination. In another embodiment, the implementation of the given function may be a nonlinear function, which provides a nonlinear decreasing the relative duty cycles corresponding to the decreasing levels of regulation of illumination. Duty cycle of the signal power control with PWM set percentage in the block S427 and transmitted to the power Converter 220 via the control bus 229 in block S430. The process returns to block S421 to continue measuring the phase angle of the dimmer θ.

In the depicted embodiment, the implementation in block S424 made a separate decision on whether the measured phase angle of the dimmer less than or equal to the second phase angle θ2after it was determined that the phase angle of dimmer fell below the first phase angle θ1in block S422 before the signal power control PWM calculated in block S422, in accordance with the ass�tion function. However, in various alternative embodiments, an explicit comparison with a second phase angle θ2can be excluded, so that the signal power control PWM is calculated in block S426 (and power Converter starts to operate in a mode with feedback) after it was determined that the measured phase angle θ of the dimmer less than the first phase angle θ1. For example, given a function in itself can lead to the fact that the relative duty cycle is set to a fixed minimal install power at a second phase angle θ2without the need for a separate comparison between the measured phase angle of the dimmer θ and the second phase angle θ2.

Fig. 5 is a block diagram showing a process of determining the output power of the power Converter in accordance with a characteristic variant implementation. The process depicted in Fig. 4 may be implemented, for example, power Converter 220 shown in Fig. 2, although it can use other types of processors and controllers within the scope of the present invention.

In block S521 power Converter 220 receives (adjusted) rectified voltage Urect from the rectification circuit 205. At the same time, in block S522 power Converter 220 p�animal signal power control with PWM detector phase angles 210, as shown in block S430 in Fig. 4. In block S523 is determined whether a signal is a power control PWM fixed to the maximum setting. When the signal power control PWM is fixed to the maximum setting (block S523: Yes), the operating point of the power Converter 220 is fixed, and the power output is determined in the mode without feedback in block S524 on the basis of only the magnitude of the rectified voltage taken in block S521. Specific power output is issued in the led load 230 in block S530, and the process returns to block S521.

When the signal power control with PWM is not fixed to the maximum setting (block S523: No), in block S525 is determined whether a signal is a power control with PWM at a fixed minimum setting. When the signal power control PWM is a fixed minimum setting unit (S525: Yes), the operating point of the power Converter 220 is fixed, and the power output is determined in the mode without feedback in block S524 on the basis of only the magnitude of the rectified voltage taken in block S521. Specific power output is issued in the led load 230 in block S530, and the process returns to block S521.

When the signal power control with PWM is not a fixed minimum setting unit (S525: �et), power output is determined in the mode of feedback in block S526 based on the magnitude of the rectified voltage taken in block S521, and signal power control with PWM taken in block S522. Specific power output is issued in the led load 230 in block S530, and the process returns to block S521.

In the depicted embodiment, the implementation in the block S525 made a separate decision on whether the signal power control with PWM at a fixed minimum installed capacity after the unit S523 is determined that the signal power control with PWM is not fixed, the maximum installation capacities, and the output power is determined based on both the magnitude of the rectified voltage, and the signal power control with PWM in block S526. However, in various alternative embodiments, an explicit comparison with a fixed minimum setting power can be excluded, so that the signal output power is based on both the magnitude of the rectified voltage, and the signal power control PWM with any installation of power (provided by the signal power control with PWM), which is less than the fixed maximum set power. For example, the power Converter 220 may be performed in�zmoznostjo the issuance of decreasing power output, corresponding to the decreasing the power setting, so the lowest output power level corresponds to the least power installation without the need for a separate comparison between the signal strength power control with PWM and a specified fixed minimum installation capacity.

According to Fig. 2 depicts a typical embodiment, the implementation of a scheme for detecting phase angles 210 contains the microcontroller 215, which uses pulse shape of the rectified voltage Urect to determine the phase angle of the dimmer. The microcontroller 215 contains a digital input pin 218 is connected between the upper diode D211 and bottom diode D212. The upper diode D211 has the anode connected to the digital input pin 218, and the cathode connected to the voltage source Vcc, and the lower diode 112 has an anode connected to ground and a cathode connected to the digital input pin 218. The microcontroller 215 also contains a digital output, such as a PWM output 219.

In various embodiments, the microcontroller 215 may be, for example, PIC12F683 supplied by the company Microchip Technology, Inc., although you can use other types of microcontrollers or other processors within the scope of the present invention. For example, the functionality of the microcontroller� 215 can be implemented using one or more processors and/or controllers and the corresponding storage device, that may be programmed using software or firmware to perform various functions, or may be implemented as a set of dedicated hardware to perform some functions and a processor (e.g., one or more programmed microprocessors and associated circuits) to perform other functions. Examples of controller components that may be used in various embodiments of the present invention include, inter alia, universal microprocessors, microcontrollers, ASIC and FPGA, as described above.

Scheme for determining the phase angles 210 further comprises various passive electronic components, such as the first and second capacitors C and C, and first and second resistors R211 and R212. A first capacitor Is connected between the digital input pin 218 of the microcontroller 215 and definitions node N1. The second capacitor Is connected between the definitions node N1 and the ground. First and second resistors R211 and R212 are connected in parallel between the rectified voltage node N2 and node definitions N1. In the depicted embodiment, the first capacitor C can have a value of about 560 pF and the second capacitor C can have a value of about 10 pF, for example. In addition, per�th resistor R211 may have a value of about 1 ohms, and the second resistor R212 may have a value of about 1 ohms R212, for example. However, the corresponding values of the first and second capacitors C and C and first and second resistors R211 and R212 may vary to provide unique benefits for any particular situation or to meet specific application requirements of various implementations, as is obvious to a person skilled in the technical field.

(Adjusted) rectified voltage Urect is connected alternating current digital input pin 218 of the microcontroller 215. The first resistor R211 and the second resistor R212 limit the current to a digital input pin 218. When the shape of the pulse waveform of the rectified voltage Urect is set to a high potential, the first capacitor Is charged on the rising edge through the first and second resistors R211 and R212. The upper diode D211 in the microcontroller 215 detects the level of the digital input pin 218 one voltage drop diode above Vcc, for example. On dropping the front of the pulse form signal of the rectified voltage Urect first capacitor Is discharged, and the level of the digital input pin 218 is fixed to one voltage drop diode below ground through the lower diode 212. Accordingly, the resulting digital signal logic level on digital input �ontake 218 of the microcontroller 215 accurately follows the clipped rectified voltage Urect, examples are shown in Fig. 6A-6C.

In particular, Fig. 6A-6C show examples of pulse shape and corresponding digital pulses the controller to the digital input pin 218 in accordance with a characteristic variant implementation. Top pulse shape in each figure displays a clipped rectified voltage Urect, the magnitude of the cut-off reflects the level of regulation is light. For example, the pulse shape can display part of the total high of 170 In (or 340 In the European Union), the rectified sinusoidal signal which appears at the output of the dimmer. The lower rectangular pulse shape display the corresponding digital pulses observed on the digital input pin 218 of the microcontroller 215. In particular, the length of each digital pulse corresponds to a clipped form of the pulse and therefore equal to the length of time during which an embedded controller switch light "on". Due to the reception of digital pulses through a digital input pin 218 of the microcontroller 215 can determine the level on which you installed the dimmer.

Fig. 6A shows examples of the pulse shape of the rectified voltage Urect and corresponding digital pulses when the dimmer is set to its maximum�ke, pictured top slider dimmer that is shown with the pulse shapes. Fig. 6B shows examples of the pulse shape of the rectified voltage Urect and corresponding digital pulses when the dimmer is at the middle setting, shows a middle position of the slider dimmer that is shown with the pulse shapes. Fig. 6C shows examples of the pulse shape of the rectified voltage Urect and corresponding digital pulses when the dimmer is at minimum setting, depicted lower position of the slider dimmer shown next to the shapes of the impulse.

Fig. 7 is a block diagram showing a process of measuring the phase angle of a dimmer in accordance with a characteristic variant implementation. This process may be implemented using firmware and/or software executable by the microcontroller 215, shown in Fig. 2, for example, or more generally accepted way by means of detector phase angles 110, shown in Fig. 1.

In block S721 in Fig. 7 is measured by the rising edge of the digital pulse input signal (for example, illustrates the growing fronts of the lower forms of the pulse in Fig. 6A-6C), and the digital sampling �initial contact 218 of the microcontroller 215, for instance, begins in block S722. In the depicted embodiment, the implementation of the digitization of the signal is in digital form within a specified time, equal size, slightly smaller half period of the mains voltage. Every time is the digitization of the signal, in block S723 is determined whether a discrete value a high level (e.g., a digital "1") or low level (e.g., a digital "0"). In the depicted embodiment, the implementation in the block S723, a comparison is made to determine whether a discrete digital value "1". When a discrete digital value is "1" (block S723: Yes), in block S724, the counter is incremented, and when the discrete digital value is not "1" (block S723: No), in block S725 introduces a slight delay. The delay is introduced so that the number of cycles synchronization (for example, the microcontroller 215) is the same regardless of whether you have defined the discrete values as a digital "1" or digital "0".

In block S726 is determined, if implemented discretization of the entire half cycle of the mains voltage. When the half cycle of the mains voltage has not been completed (block S726: No), the process returns to block S722 to re-sample the signals on the digital input pin 218. When the half cycle of the mains voltage is completed (block S726: Yes), the discretization pre�rotatin, and the count value (the accumulated in the block S724) is set as the current phase angle of the dimmer or the regulation of light in the block S727 and remembered, for example, in a storage device, examples of which are described above. The counter is reset to zero, and the microcontroller 215 waits for the next rising front for the re-start of sampling.

For example, it can be assumed that the microcontroller 215 accepts 255 discrete values during the half cycle of the mains voltage. When the throttle level of illumination is set by the slider in the upper position of its range (for example, as shown in Fig. 6A), the counter value will increase to about 255 in block S724 of Fig. 6. When the throttle level of illumination is set by the slider in the lower position of its range (for example, as shown in Fig. 6C), the counter value will increase to about 10 or 20 in the block S724. When the control light is set approximately in the middle of its range (for example, as shown in Fig. 6B), the counter value will increase to about 128 in the block S724. Thus, the value of the counter gives the microcontroller the exact indication of the level set in the dimmer, or the phase angle of the dimmer. In different options�the ants implementation of the phase angle of the dimmer can be calculated, for example, the microcontroller 215 using the given function counter value, and function may vary to provide unique benefits for any particular situation or to meet specific application requirements of various implementations, as is obvious to a person skilled in the technical field.

Accordingly, the phase angle of dimmer can be measured by electronic means using the minimum number of passive components and the digital input structures of the microcontroller (or other processor or processing circuit data). In one embodiment, the implementation of the phase angle measurement is performed using the communication circuit of alternating current, digital input structures of the microcontroller diode fixation and algorithm (e.g., implemented with firmware, software and/or hardware), the executable to determine the level of installation of a dimmer. In addition, the state of the dimmer can be measured with a minimum number of components and using the digital input structures of the microcontroller.

In addition, the control system of light regulation that contains the circuit for measuring the phase angle of the dimmer, Converter Pete�Oia and the corresponding algorithm (algorithms), can be used in various situations when you want to control the regulation of illumination at small phase angles of the dimmer in the dimmer with a cut-off phase, which in other cases in traditional systems, the regulation of illumination is terminated. Management system regulation of illumination increases the adjustment range of illumination and can be used with an electronic transformer with led load that is connected to a dimmer with a cut-off phase, especially in situations where you want the level of regulation of illumination in the lower part were within the range of less than approximately five percent of the maximum light output, for example.

Management system regulation of illumination, in accordance with various embodiments of the implementation, can be implemented in various lamps of white light. In addition, it can be used as a unified hub "smart" improvements different products to make them more friendly to the dimmer.

In various embodiments, the functionality of detector phase angles 110, circuits for determining the phase angles of the microprocessor 210 or 215 may be implemented using one or more schemes clicks�processing, created from any set of architectures, hardware, firmware or software, and may include its own memory (e.g., nonvolatile memory) for storing executable code, the executable software/firmware that allows you to perform various functions. For example, functionality can be implemented using ASIC, FPGA, etc.

Specialists in the art it is obvious that all the parameters described here, dimensions, materials and configurations are examples and that actual parameters, dimensions, materials and/or configurations will depend on the specific application or applications in which the present invention is used. Specialists in the art will take into account or can be installed using nothing more than simple experimentation many equivalents to the described specific embodiments. Therefore, it is necessary to understand that the variants described above implementation is presented only as an example, and that within the scope of the attached claims and its equivalents embodiments of the invention can be implemented otherwise than specifically described and claimed herein. Varian�s implementation of the present invention are described here to each individual characteristic, 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 are not mutually inconsistent, is included in the scope of the present invention.

You need to understand that everything is worded and the definition used here will take precedence over dictionary definitions, definitions in documents incorporated in this document by reference, and/or common meanings of certain terms.

Under the indefinite articles "a" and "an" are used herein in the description and the claims, unless explicitly is not specified, should be understood as "at least one". Under used herein in the description and the claims, the phrase "at least one" against the list of one or more items, you should understand at least one element selected from one or more elements in the list elements, but not necessarily including at least one of all without exception of the items specifically listed in the list of elements and not excluding any set of elements in the list elements. This definition also allows that optional may contain elements in addition to �elements, specially installed in the list of elements, which include the phrase "at least one", whether related or not related to the specially established elements. So, as a non-restrictive example "at least one of A and b (or, equivalently, "at least one of A or b" or, equivalently, "at least one of A and/or b") can refer, in one embodiment, the implementation of at least one, optionally including more than one And in the absence of (and including optional elements in addition to B); in another embodiment, the implementation of at least one, optional including more than one In the absence of A (and including the optional elements in addition to (A); in yet another variant implementation, at least one, optionally including more than one A and at least one, optionally including more than one In (optional including other elements); etc.

It should also be understood that, except as otherwise expressly not listed in any of the claimed methods, which include more than one step or operation, the order of the steps or actions of the method is not necessarily limited to the order in which lists the steps or actions of the method. In addition, reference positions, when available, are presented in the claims for convenience only and nikemarathon should not be construed as restrictive.

In the claims and in the description above transitional phrases such as "comprising", "including", "containing", "having", "containing", "comprising", "containing", "has", etc. should be considered non-limiting, i.e. meaning "including without limitation". Only the transitional phrases "consisting of" and "consisting essentially of" shall be read as limiting or paleographically respectively.

1. System to control the level of light output of solid state lighting load controlled by the dimmer, and the system includes:
detector phase angles, made with the possibility of measuring the phase angle of the dimmer based on the rectified voltage from the dimmer and determining the signal power control based on the comparison of the measured phase angle with a predetermined first threshold; and
power Converter, arranged to supply the output voltage to the solid state lighting load, wherein the power Converter operates in the mode without feedback based on the rectified voltage from the dimmer when the measured phase angle larger than the first threshold, and operates with a feedback based on the rectified voltage from the inverter lit�spine and some signal power control with detector phase angles, when the measured phase angle less than the first threshold.

2. A system according to claim 1, in which the detector phase angles determines that the signal power has a predetermined first fixed value when the measured phase angle larger than the first threshold value.

3. A system according to claim 2, in which the detector phase angles determines that the signal power control is variable, calculated as a function of the measured phase angle when the measured phase angle less than the first threshold value.

4. A system according to claim 3, in which the control signal power includes the duty cycle, adjustable detector phase angles.

5. A system according to claim 4, in which the duty cycle has a maximum value corresponding to a predetermined first fixed value control signal power, when the measured phase angle larger than the first threshold value.

6. A system according to claim 5, in which the duty cycle is the percentage of the work cycle value of 100 percent.

7. A system according to claim 4, in which the duty cycle has a variable value corresponding to a predetermined first fixed value control signal power, when the measured phase angle less than the first threshold value.

8. A system according to claim 7, in which the duty cycle is the percentage of the work cycle, which decreases proportional�about reducing the measured phase angle.

9. A system according to claim 4, in which the signal power control signal contains a pulse width modulation (PWM).

10. A system according to claim 3, in which the detector phase angles further configured to determine the signal power control based on the comparison of the measured phase angle with a predetermined second threshold is less than a predetermined first threshold; and
in which the power Converter operates in the mode without feedback based on the rectified voltage from the dimmer when the measured phase angle is less than the second threshold.

11. A system according to claim 10, in which the detector phase angles determines that the signal power has a predetermined second fixed value when the measured phase angle is less than the second threshold value.

12. A system according to claim 11, in which the control signal power includes the duty cycle, adjustable detector phase angles, wherein the duty cycle has a minimum value corresponding to a predetermined second fixed value control signal power, when the measured phase angle is less than the second threshold value.

13. A system according to claim 12, in which the duty cycle is the percentage of the work cycle value of zero percent.

14. The method of throttling power to control the level of light output of solid state lighting (SS) load using a power Converter, connected to the dimmer, the method includes:
measuring the phase angle of the dimmer, appropriate level of regulation of light, set in the dimmer;
when the measured phase angle is greater than the first threshold regulation of the light - emitting control signal power, having a first fixed installation of power, and the modulation of light output level of the SSL load based on the magnitude of the output voltage of the dimmer; and
when the measured phase angle less than the first threshold regulation of the light - emitting control signal power, with the installation of power, which is defined as a function of the measured phase angle and the modulation of light output level of the SSL load based on the magnitude of the output voltage of the dimmer and a certain power settings.

15. A method according to claim 14, further comprising:
when the measured phase angle is less than the second threshold, adjusting the light - emitting control signal output, having a second fixed installation power, and the modulation of light output level of the SSL load based on the magnitude of the output voltage of the dimmer, wherein the second throttling threshold illuminance is less than the first threshold regulation Sweden�STI, and the second fixed installation power less than the first fixed installation of power.

16. A method according to claim 14, in which the function of the measured phase angle contains a linear feature.

17. A method according to claim 14, in which the function of the measured phase angle comprises a nonlinear function.

18. The device, containing:
light-emitting diode (LED) load, with the light output corresponding to the phase angle of the dimmer;
the circuit for measuring the phase angle, is arranged to measure the phase angle of the dimmer and alarm power control with pulse-width modulation (PWM) PWM output, wherein the signal power control PWM has a duty cycle determined based on the measured phase angle of the dimmer; and
power Converter, configured to receive the rectified voltage from the dimmer and signal power control with PWM circuits for measurement of phase angle and supplying the output voltage to the led load;
moreover, the circuit for measuring the phase angle specifies the duty cycle of the signal power control PWM with a fixed high percentage when the measured phase angle exceeds a high threshold, providing the definition of the power Converter output voltage based on the magnitude of the rectified voltage br/> moreover, the circuit for measuring the phase angle specifies the duty cycle of the signal power control PWM with a variable percentage, calculated in the form of a predetermined function of the measured phase angle when the measured phase angle is less than high threshold, providing the definition of the power Converter output voltage signal-based power control with PWM in addition to the magnitude of the rectified voltage.

19. The device according to claim 18, in which the measuring circuit phase angle contains:
the microcontroller that contains the digital input and at least one diode, the locking digital input to the voltage source;
a first capacitor connected between the digital input of the microcontroller and the site of measurement;
a second capacitor connected between the node definition and the earth;
at least one resistor connected between the node definition and a rectified voltage node, receiving the rectified voltage from the dimmer.

20. The device according to claim 19, in which the microcontroller executes the algorithm, which includes the discretization of digital pulses received on the digital input corresponding to the shapes of the pulses of the rectified voltage at the rectified voltage node, and determining the lengths of the sampled digital pulses to establish the level of regulation light regulation�Torah light.



 

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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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