KR102585313B1 - Converter for led sensitive faculty lighting equipment - Google Patents

Abstract

The present invention can control two or more groups of LED drivers with a single converter, and even if different types of dimming signals are input, the LED can be dimmed by outputting a PWM dimming signal that dims the LED driver for the input dimming signal. , relates to a converter for LED emotional lighting that can protect LEDs by controlling the maximum output driving the LEDs, comprising: a power conversion unit that converts alternating current power into direct current power; An LED driving unit comprising a first LED driving module that drives the first LED module with the direct current power converted by the power conversion unit and a second LED driving module that drives the second LED module; a protection circuit unit that converts a dimming signal applied from the outside and outputs a control dimming signal including a first control dimming signal and a second control dimming signal; and a first dimming signal input module that receives the first control dimming signal output from the protection circuit unit and inputs it to the first LED driving module, and a second control dimming signal input module that receives the second control dimming signal output from the protection circuit unit. It is characterized by comprising a dimming signal input unit including a second dimming signal input module that is input to the LED driving module.

Description

Converter for LED emotional lighting {CONVERTER FOR LED SENSITIVE FACULTY LIGHTING EQUIPMENT}

The present invention relates to a converter for LED emotional lighting, and more specifically, to a converter that can control two or more groups of LED drivers with a single converter and dims the LED drivers for input dimming signals even when heterogeneous dimming signals are input. This relates to a converter for LED emotional lighting that can dim LEDs by outputting a PWM dimming signal and protects LEDs by controlling the maximum output driving the LEDs.

LED (Light-Emitting-Diode) is environmentally friendly and has a high-speed response time of several nanoseconds, making it effective for video signal streams. In addition, LEDs are capable of impulsive driving, have color reproducibility of over 100%, and have the advantage of being able to arbitrarily change brightness, color temperature, etc. by adjusting the amount of light of red, green, and blue LEDs.

These LEDs are current-driven devices, and their brightness changes depending on the amount of current flowing through the LED. At this time, the converter that supplies power to the LED requires a circuit to control the current flowing through the LED, and there are two types of control methods: constant voltage and constant current.

The constant voltage method is one in which the current value changes to maintain the voltage, and the constant current method is one in which the voltage continues to change to keep the current constant. Constant current type converters are mainly used in LED lamps.

Meanwhile, it is known that 70% of the information that people experience on a daily basis is obtained through vision. The color of each object perceived through vision has a significant effect on a person's emotions and experiences. In other words, past memories may be recalled or certain emotions may be evoked through specific colors. Therefore, the color of lighting, which can determine the color of objects in everyday life, is very important in human emotions. And because the lighting environment can change workers' brain waves, lighting color temperature is believed to have a direct effect on workers' fatigue.

As research results such as these have shown that excessively bright or dark lighting and colors have a significant impact on a person's emotions and body, lighting can make people comfortable and also increase work efficiency.

Therefore, considering the emotional stimulation function of lighting, various studies have been conducted recently on lighting that can not only provide simple visual information but also provide light of various colors that can stimulate human emotions.

In addition, because each person may have different sensibilities regarding color and illumination, there is a demand for a lighting device that can freely and easily create lighting of the user's desired atmosphere.

Figure 1 is a diagram showing the configuration of a conventional emotional lighting device for LED. As shown in the attached Figure 1, the conventional emotional lighting device for LED largely consists of converters 11 and 12 that supply and control power to LEDs and an LED module. It is composed of a light emitting unit 13 that emits light by distinguishing color temperatures.

In the above configuration, the light emitting unit 13 is divided into a cool color LED module 13a, which emits light at a cool color temperature, and a warm color LED module 13b, which emits light at a warm color temperature. Each color module is In order to operate independently, converters 11 and 12 corresponding to each color module must be configured.

In order to solve the above problems, an LED lighting automatic control converter device applied to IoT and a lighting device using the same were disclosed in Registered Patent Publication No. 10-1959713.

The technology includes a main converter board that converts external AC current into DC current; It is equipped with a communication board that interfaces with the sensor board equipped with an illuminance sensor and the user controller, and is equipped with an MCU that converts control signals input from the sensor board and communication board into main converter board control signals. It has the function of selecting and deactivating the automatic illuminance control mode using a sensor board and selecting and deactivating the manual illuminance control mode according to the control signal received from the control signal, and has a built-in time-linked processor to schedule the on/off timer signal and turn off indicated by the user controller. Sensor/communication integrated board that receives signals and converts them into main converter board control signals; and a sub-power board that provides power to the sensor/communication integrated board.

However, the above technology is configured to control two LED loads using one converter, but if the output applied to one LED load is minimum, the output applied to the other LED load can be output at more than 100%. If the output exceeds 100%, problems such as LED damage or serious errors may occur.

Additionally, as a technology for LED emotional lighting, an LED emotional lighting device was disclosed in Patent Registration No. 10-2120123.

The above technology includes a voltage converter that converts external commercial power to DC rated power and outputs it, a constant voltage distribution circuit that distributes and outputs DC rated power to multiple channels, and a variable current value and dimming value of DC rated power input to multiple channels. a dimming control circuit unit that generates a lighting control signal and controls at least one LED emitter among the plurality of LED emitters using the lighting control signal, and a current value of the dimming control circuit unit according to the illuminance and color temperature control values input from the outside. It is comprised of a lighting control unit that controls the operation of varying the dimming value.

Likewise, in the above technology, there is a problem that power may be supplied to the LED light emitting unit in excess of the maximum output based on the dimming signal as the dimming control circuit is configured to control at least one LED light emitting unit among the plurality of LED light emitting units.

In addition, different methods may be applied to the LED dimming signal depending on the installed configuration. In other words, the general dimming signal is mainly a zero-turn type that outputs a signal by varying the voltage of 0 to 10V or a PWM type that includes frequency, and the existing installed configuration is a lighting device that outputs a zero-turn type dimming signal. An interface device that can only receive zero-turn dimming signals must be configured, and a lighting device that outputs a PWM-type dimming signal must have an interface device that can only receive PWM-type dimming signals.

Registered Patent Publication No. 10-1959713 (2019. 03. 13.) Registered Patent Publication No. 10-2120123) 2020. 06. 02.)

The present invention was created to solve the problems of the prior art as described above. The problem to be solved by the present invention is to provide a converter for LED emotional lighting that can control two or more groups of LED driving units with one converter.

In addition, the object of the present invention is to provide a converter for LED emotional lighting that can output a PWM dimming signal that dims the LED driver for the input dimming signal, no matter which type of dimming signal is input, either the zero-turn method or the PWM method.

In addition, the aim is to provide a converter for LED emotional lighting that can protect the LED by controlling the maximum output driving the LED.

A converter for LED emotional lighting according to an embodiment of the present invention to solve the above problems includes a power conversion unit that converts alternating current power into direct current power; An LED driving unit comprising a first LED driving module that drives the first LED module with the direct current power converted by the power conversion unit and a second LED driving module that drives the second LED module; a protection circuit unit that converts a dimming signal applied from the outside and outputs a control dimming signal including a first control dimming signal and a second control dimming signal; and a first dimming signal input module that receives the first control dimming signal output from the protection circuit unit and inputs it to the first LED driving module, and a second control dimming signal input module that receives the second control dimming signal output from the protection circuit unit. It is characterized by comprising a dimming signal input unit including a second dimming signal input module that is input to the LED driving module.

Here, the control dimming signal is the sum of the output power output from the first LED driving module by the first control dimming signal and the output power output by the second LED driving module by the second control dimming signal. It is characterized in that it is controlled not to exceed the sum of the rated power of the first LED module and the rated power of the second LED module.

In addition, the protection circuit unit includes a first signal input terminal that receives a first dimming signal from the outside; a second signal input terminal that receives a second dimming signal from the outside; a control protection module that generates and outputs a first control dimming signal and a second control dimming signal in response to dimming signals input from the first dimming input terminal and the second dimming input terminal; a first signal output terminal that outputs a first control dimming signal output from the control protection module to the first dimming signal input module; And it may be configured to include a second signal output terminal that outputs a second control dimming signal output from the control protection module to the second dimming signal input module.

In addition, the control protection module includes a determination unit that determines whether the dimming signal input from the first signal input terminal and the second signal input terminal is a zero-turn dimming signal or a PWM dimming signal; Based on the dimming signal determined by the determination unit, a first control dimming signal corresponding to the first dimming signal input to the first signal input terminal is generated, and the second control dimming signal is generated based on the dimming signal determined by the determination unit. a control signal generating unit that generates a second control dimming signal corresponding to the second dimming signal input to the signal input terminal; The output power calculated by adding the output power output from the first LED driving module by the first control dimming signal and the output power output from the second LED driving module by the second control dimming signal and the first A comparison unit that compares the rated power calculated by adding the rated power of the LED module and the rated power of the second LED module; It may be configured to include a control unit that controls the output power so that the output power as a result of the comparison of the comparison unit does not exceed the rated power.

At this time, the control unit is configured to output the generated first control dimming signal and the second control dimming signal when the output power as a result of the comparison of the comparison unit is less than the rated power.

In addition, when the output power as a result of the comparison of the comparison unit exceeds the rated power, the generated first control dimming signal is controlled to 1/2 the rated power of the first LED module and the generated second control dimming signal It can be configured to control and output at 1/2 of the rated power of the first LED module.

Alternatively, when the output power as a result of comparison of the comparison unit exceeds the rated power, the output power by the control dimming signal of the constant dimming signal with respect to the variable dimming signal is reduced to prevent the output power from exceeding the rated power. It may be configured to control the output power to prevent

In addition, the dimming signal applied from the outside is characterized in that it consists of one dimming signal selected from a zero-turn type dimming signal with a variable voltage of 0 to 10V and a PWM type dimming signal with pulse width modulation.

Additionally, the protection circuit determines whether the signal is a zero-turn type dimming signal or a PWM type dimming signal, and converts the determined dimming signal into a control dimming signal.

In addition, the first LED module is selected from a cool color LED module that emits light with a cool color temperature or a warm color LED module that emits light with a warm color temperature, and the second LED module is not selected from the first LED module. It can be composed of one or more.

According to the present invention, the output applied to all LED modules can be controlled so that it does not exceed the maximum output while driving two groups of LED modules using one converter, which has the advantage of ensuring the stability of the LED module. there is.

In addition, even if different types of dimming signals are input, there is an advantage that an emotional lighting device can be configured using a pre-installed dimming controller by outputting a PWM dimming signal that dims the LED driver for the input dimming signal.

1 is a configuration diagram of a conventional emotional lighting device for LED;
Figure 2 is a schematic configuration diagram of a converter for LED emotional lighting according to the present invention;
Figure 3 is a circuit diagram of the power conversion unit applied to the present invention,
Figure 4 is a circuit diagram of the LED driver applied to the converter for LED emotional lighting according to the present invention;
Figure 5 is a diagram schematically showing the configuration of the LED driver, LED module, dimming signal input unit, and protection circuit unit applied to the converter for LED emotional lighting according to the present invention;
Figure 6 is a table showing a comparison between the power factor obtained by the converter for LED emotional lighting according to the present invention and the power factor used by two conventional converters;
Figure 7 is a configuration diagram of the protection circuit applied to the converter for LED emotional lighting according to the present invention.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

When a component is said to be “connected” or “connected” to another component, it is understood that it may be directly connected to or connected to that other component, but that other components may exist in between. It should be.

On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

The terms used in this specification are merely used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, “comprises.” Terms such as "have" are intended to designate the existence of features, numbers, processes, operations, components, parts, or a combination thereof described in the specification, but are not intended to indicate the existence of one or more other features, numbers, processes, operations, or configurations. It should be understood that this does not exclude in advance the possibility of the presence or addition of elements, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present application. No.

The term MODULE as used herein refers to a unit that processes a specific function or operation, and may mean hardware, software, or a combination of hardware and software.

Terms or words used in this specification and claims should not be construed as limited to their common or dictionary meanings, and the inventor may appropriately define the concept of terms in order to explain his or her invention in the best way. Based on the principle that there is, it must be interpreted with a meaning and concept consistent with the technical idea of the present invention. In addition, if there is no other definition in the technical and scientific terms used, they have meanings commonly understood by those skilled in the art to which this invention pertains, and the gist of the present invention is summarized in the following description and accompanying drawings. Descriptions of known functions and configurations that may be unnecessarily obscure are omitted. The drawings introduced below are provided as examples so that the idea of the present invention can be sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms. Additionally, like reference numerals refer to like elements throughout the specification. It should be noted that like elements in the drawings are represented by like symbols wherever possible.

The present invention can control two or more groups of LED drivers with a single converter, and even if different types of dimming signals are input, the LED can be dimmed by outputting a PWM dimming signal that dims the LED driver for the input dimming signal. This relates to a converter for LED emotional lighting that can protect LEDs by controlling the maximum output driving the LEDs.

Figure 2 is a diagram showing the schematic configuration of a converter for LED emotional lighting according to the present invention.

Referring to the attached FIG. 2, the converter 1 for LED emotional lighting according to the present invention includes a power conversion unit 100, an LED driver 200, a protection circuit unit 300, a dimming signal input unit 400, and an auxiliary power unit 500. ) and consists of.

The power conversion unit 100 converts alternating current power into direct current power, and Figure 3 shows a circuit diagram of the power conversion unit applied to the present invention.

Referring to the attached FIG. 3, the power conversion unit 100 applied to the present invention includes a filter circuit 110, a rectifier circuit 120, a PWM circuit 130, a transformer 140, a constant voltage output circuit 150, and a feedback circuit. It is composed including (160).

The filter circuit 110 blocks power noise contained in the input AC power from being transmitted to the internal circuit.

The filter circuit 110 includes two line filters (LF1, LF2) and capacitors (CY1, CY2) connected between the line filters (LF1, LF2), and the two capacitors (CY1, CY2) connected in series. The midpoint is grounded to eliminate conductive noise contained in commercial power by flowing it to the ground.

The rectifier circuit 120 rectifies the alternating current power output from the filter circuit 110 into direct current power. That is, the rectifier circuit 120 rectifies AC power to direct current power by a bridge diode and outputs it. It is composed of bridge diodes (D1 to D4) and rectifies the input power output from the filter circuit into pulsating current power. Convert.

The PWM circuit 130 controls the on and off of the transformer 140 disposed at the rear end using pulse width modulation (PWM).

To describe the PWM circuit 130 in more detail, a transistor (Q1) that switches the transformer (140, T1) on and off, a control element (U1) that controls the switching of the transistor (Q1), and a control element (U1). A start resistor (R4) that provides the starting voltage for initial operation, a voltage sensing resistor and capacitor (R60, R63, C33) that detects the voltage waveform of the output pulsating current power of the rectifier circuit and provides it to the control element (U1), and a transformer. An auxiliary coil wound and magnetically coupled to the primary side of (140, T1), and a driving power supply part (D5, C2) that converts the voltage induced in the auxiliary coil into a constant voltage, converts it into driving power, and provides it to the control element (U1). , R7, R7, R9, R10), detects the current induced by the switching of the transformer (140, T1) from the auxiliary coil, detects the zero point where the current intensity is 0, and provides the current to the control element (U1) Including a resistor (R12), a snubber (D5) that limits and protects the strength of the back electromotive force induced in the primary side of the transformer (140, T1) according to switching, and peripheral elements connected to drive the control element (U1). It is composed.

In the above, the control element (U1) is configured so that the waveform output from the transformer (140, T1) has a shape that matches the waveform of the voltage output from the rectifier part (1), that is, the voltage and current are in phase.

The primary side of the transformer (140, T1) is connected to the driving power supply part, the secondary side is connected to the constant voltage output circuit 150, and the auxiliary winding feeds back the output voltage. The transformer 140 may be provided with a primary winding and a secondary winding having a preset number of turns, and the primary winding and the secondary winding may be electromagnetically coupled to each other to form a turns ratio, and the PWM circuit 130 may be formed by the turns ratio. The voltage level can be converted and output.

In addition, the voltage output from the transformer 140 is transmitted to the auxiliary power supply unit 500, and the power delivered to the auxiliary power supply unit 500 is stabilized and output to supply power to the outside.

The constant voltage output circuit 150 outputs the secondary voltage of the transformer 1400 as a set specified voltage.

The feedback 160 provides a switching operation by feeding back the primary and secondary voltage states of the transformer 140 to the PWM circuit 130.

In this way, the power conversion unit 100 supplies stable power to the LED driver 200.

The LED driver 200 drives the LEDs configured in the LED module with the direct current power converted by the power conversion unit 100, and Figure 4 shows a circuit diagram of the LED driver applied to the converter for LED emotional lighting according to the present invention.

Referring to the attached FIG. 4, the LED driver 200 applied to the converter for LED emotional lighting according to the present invention includes a first LED driver module 210 that drives the first LED module and a second LED that drives the second LED module. It is configured to include a driving module 220.

In the above, the first LED driving module 210 and the second LED driving module 220 are configured identically.

The first LED driving module 210 will be described using the attached FIG. 4, and the second LED driving module 220 will be omitted as a description of the first LED driving module 210.

When the voltage output from the constant voltage output circuit 150 is applied to the VIN terminal of the driving IC (U3), it is applied to the drain terminal of the transistor (Q3) through the capacitor (CE6), and the driving IC (U3) operates as an internal regulator. A voltage for operating the driving IC (U3) is applied and the first LED driving module 210 is converted to an activated state.

Accordingly, the resistor (R37) of the RT terminal of the driving IC (U3) controls the PWM switching frequency of the driving IC (U3).

The first signal is initiated at the DRV terminal of the driving IC (U3), and the voltage applied to the drain terminal of the transistor (Q3) by the signal is transmitted through the drain of the transistor (Q3).

The current applied to the drain of the transistor (Q3) is transmitted to ground (GND) through the current sensor resistor (RS9), and a voltage is applied to the current sensor resistor (RS9).

The voltage applied to the current grounding resistance (RS9) is transmitted from the CS terminal of the driving IC (U3) through the resistor (R47), where the resistor (R47) and the capacitor (C12) are connected to the voltage generated from the current grounding resistance (RS9). It serves to attenuate surge and noise components.

While the transistor (Q3) is on (0n), the coil (L3) is charged, and when the transistor (Q3) is off, the power charged in the coil (L3) is transmitted to the output terminal (CN2) through the diode (D12). It is transmitted, and the LED module connected to the output terminal lights up.

The voltage generated by the current ground resistance (RS9) is applied to the CS terminal of the driving IC (U3) and compared with the internal reference voltage (0.28V) of the CS terminal. By adjusting the PWM switching duty according to the result of the comparison, constant current operation is performed in which a constant current flows through the LED module.

Figure 5 is a diagram schematically showing the configuration of the LED driver, LED module, dimming signal input unit, and protection circuit unit applied to the converter for LED emotional lighting according to the present invention.

Referring to the attached FIG. 5, the LED driver 200 includes a first LED driver module 210 and a second LED driver module 220, and the LED module 20 includes the first LED driver module ( It is configured to include a first LED module 21 driven by 210 and a second LED module 22 driven by the second LED driving module 220.

Here, each of the first LED module 21 and the second LED module 22 is composed of a plurality of LEDs, and one selected among the LED modules is composed of a cool color LED module that emits light at a cool color temperature, and the other LED module is composed of a plurality of LEDs. It can be composed of a warm color LED module that emits light at a warm color temperature.

That is, the first LED module 21 is one selected from a cool color LED module that emits light with a cool color temperature or a warm color LED module that emits light with a warm color temperature, and the second LED module 22 is one of the first LED modules. 1 It can be configured as one that is not selected from the LED module (21). For example, when the first LED module 21 is composed of a cool color LED module, the second LED module 22 is composed of a warm color LED module.

In addition, the input dimming signal is converted into a control dimming signal suitable for the LED driving module 200 in the protection circuit unit 300 and input to the LED driving module 200 through the dimming signal input unit 400, and the LED driving module 200 is converted into a control dimming signal suitable for the LED driving module 200. The module 200 controls dimming the first LED module 21 and the second LED module 22 based on the input control dimming signal.

In the above, the maximum output power output from the LED driver 200 must be the same as the rated power of the LED module 20.

In addition, since the light emission range of each of the first LED module 21 and the second LED module 22 must be configured to have a range of 0 to 100%, the maximum output power of the first LED driving module 210 is 0 to 100%. It must be in the range of 100%, and similarly, the maximum output power of the second LED driving module 220 must be in the range of 0 to 100%. However, when the first LED driving module 210 and the second LED driving module are operated at maximum output power, the total output power of the LED driving unit 200 must be 200%, and this output power may cause errors or burnout in the converter itself. may cause problems.

Therefore, the maximum output power output from the LED driver 200 and the rated power of the LED module 20 are maintained the same, but the output power of the first LED driver module 210 that drives the first LED module 21 is The output power of the second LED driving module 220, which drives the second LED module 22, must be individually controlled so as not to exceed the maximum output power of the LED driving unit 200.

In addition, the LED driver 200 is configured to individually control two channels within the converter, so the power factor for the AC input can be relatively improved compared to the LED driver controlled by two converters.

Figure 6 is a table showing a comparison between the power factor obtained by the converter for LED emotional lighting according to the present invention and the power factor used by two conventional converters.

The attached table in FIG. 6 shows the power factor of the LED emotional lighting converter of the present invention and two conventional converters when dimming is controlled at 100%, 50%, and 10% for two LED modules with a maximum rating of 50W.

As shown in the table of FIG. 6, the power factor by the converter for LED emotional lighting of the present invention was calculated to be 0.75 (10%) to 0.98 (100%) due to the output of 2 channels in a single converter. The power factor was calculated to be 0.45 (10%) to 0.92 (100%).

In other words, as the dimming rate is reduced, the power factor of the converter for LED emotional lighting of the present invention is significantly improved compared to the power factor composed of two conventional converters.

The protection circuit unit 300 converts the dimming signal applied from the outside and outputs a control dimming signal including the first control dimming signal and the second control dimming signal, and the dimming signal input unit 400 receives the dimming signal from the protection circuit unit 300. The transmitted control dimming signal is received and input to the LED driver 200.

Accordingly, the dimming signal input unit 400 includes a first dimming signal input module 410 that receives the first control dimming signal output from the protection circuit unit 300 and inputs it to the first LED driving module 210. It is configured to include a second dimming signal input module 420 that receives the second control dimming signal output from the protection circuit unit 300 and inputs it to the second LED driving module 220.

In this configuration, the output power of the first LED driving module 210 driving the first LED module 21 and the output power of the second LED driving module 220 driving the second LED module 22 are LED Since it must be controlled so as not to exceed the maximum output power of the driving unit 200, the control dimming signal output from the protection circuit unit 300 is output from the first LED driving module 210 by the first control dimming signal. The sum of the output power and the output power output from the second LED driving module 220 by the second control dimming signal is the rated power of the first LED module 21 and the rated power of the second LED module 22. It must be controlled so as not to exceed the sum of the powers.

To this end, the configuration of the protection circuit unit 300 will be described.

Figure 7 shows the configuration of the protection circuit applied to the converter for LED emotional lighting according to the present invention.

Referring to the attached FIG. 7, the protection circuit unit 300 includes a first signal input terminal 301 that receives a first dimming signal from the outside, a second signal input terminal 302 that receives a second dimming signal from the outside, A control protection module 303 that generates and outputs a first control dimming signal and a second control dimming signal in response to the dimming signal input from the first signal input terminal 301 and the second signal input terminal 302, The first signal output terminal 304 outputs the first control dimming signal output from the control protection module 303 to the first dimming signal input module, and the second control dimming signal output from the control protection module to the second dimming signal. It is configured to include a second signal output terminal 304 that outputs a dimming signal input module.

Meanwhile, the dimming signal is generated through a controller (eg, remote controller, terminal, mobile phone, etc.), and the generated dimming signal is input to the protection circuit unit 300 through wired or wireless communication.

That is, the dimming signal applied from the outside may be composed of various dimming signals, such as a zero-turn type dimming signal with a variable voltage of 0 to 10 V and a PWM type dimming signal with pulse width modulation.

Accordingly, the dimming signal transmitted from the outside is output and transmitted as a zero-turn type dimming signal that varies from 0 to 10V or a PWM type dimming signal (pulse width modulation). Conventionally, only a dimming signal suitable for each method must be input to operate normally. Dimming of LED module is possible.

Accordingly, in the present invention, even if dimming signals generated in various ways are input, the protection control module 303 is configured to distinguish them and convert them into dimming signals that can be recognized by the LED driver 200.

In order to solve the above problem, the control protection module 303 applied to the present invention determines whether it is a zero-turn type dimming signal or a PWM type dimming signal, and generates a control dimming signal based on the determined dimming signal. It is configured to convert, and for this purpose, the control protection module 303 includes a judgment unit 310, a control signal generation unit 320, a comparison unit 330, and a control unit 340.

The determination unit 310 determines whether the dimming signal input from the first signal input terminal 301 and the second signal input terminal 302 is a zero-turn dimming signal or a PWM dimming signal.

At this time, the judgment standard is determined according to the presence or absence of frequency.

The zero-turn dimming signal does not include a frequency component, but the PWM dimming signal includes a frequency component because it has a predetermined period and width.

Generally, PWM dimming signals include frequency components from 1 KHz to several tens of KHz.

Accordingly, if the input dimming signal contains a frequency component, the determination unit 310 determines it to be a PWM dimming signal, and if it does not contain a frequency component, it determines it to be a zero-turn dimming signal.

The control signal generation unit 320 generates a first control dimming signal corresponding to the first dimming signal input to the first signal input terminal 301 based on the dimming signal determined by the determination unit 310, Based on the dimming signal determined by the determination unit 310, a second control dimming signal corresponding to the second dimming signal input to the second signal input terminal 302 is generated.

The comparison unit 330 determines the output power output from the first LED driving module 210 by the first control dimming signal and the output power output from the second LED driving module 220 by the second control dimming signal. The output power calculated by adding up the power is compared with the rated power calculated by adding up the rated power of the first LED module 210 and the rated power of the second LED module 22.

The control unit 340 controls the output power so that the output power as a result of the comparison of the comparison unit 330 does not exceed the rated power.

At this time, the control unit 340 determines that, as a result of the comparison of the comparison unit 330, if the output power is less than the rated power, the output power does not exceed the rated power, and thus the generated first control dimming signal and the first control dimming signal are generated. 2 It is okay to output the control dimming signal as is.

For example, when the combined output power is 100% or less of the rated power, the first control dimming signal and the second control dimming signal generated by the control signal generation unit 320 are transmitted to the dimming signal input unit 400. .

However, when the combined output power exceeds 100% of the rated power, the control unit 340 adjusts the output by the first control dimming signal and the second control dimming signal generated by the control signal generation unit 320. This controls the combined output power to not exceed 100% of the rated power.

At this time, when the combined output power exceeds 100% of the rated power, the present invention is configured to control the output power in two ways: fixed dimming control and variable dimming control.

1. Fixed dimming control

Fixed dimming control controls the generated first control dimming signal to 1/2 the rated power of the first LED module 21 when the output power exceeds the rated power as a result of the comparison of the comparison unit 330 and the generated second control dimming signal is controlled to 1/2 the rated power of the first LED module 21. This is a method of controlling the control dimming signal to be output by controlling it at 1/2 of the rated power of the first LED module 22.

For example, when the output power of the first LED module 21 due to the first control dimming signal is 70%, the output power of the second LED module 22 due to the second control dimming signal increases from 20% to 60%. When adjusted upward to %, the control unit 340 adjusts the first control dimming signal so that the output power of the first LED module 21 by the first control dimming signal is 50%, which is 1/2 of the rated power. , the output power of the second LED module 22 according to the second control dimming signal is also adjusted so that the second control dimming signal is adjusted to 50%, which is half of the rated power, so that the output power does not exceed the rated power. do.

In the above, the fixed dimming control method allows the unselected dimming signal to be increased when any dimming signal input is reduced at 50%, which is 1/2 of the output power and the rated power.

2. Variable dimming control

Variable dimming control, when the output power exceeds the rated power as a result of the comparison of the comparison unit 330, reduces the output power by the control dimming signal of the constant dimming signal with respect to the variable dimming signal, so that the output power is equal to the rated power. This is a method of controlling the output power so that it does not exceed.

For example, in a state where the output power of the first LED module 21 due to the first control dimming signal is 70%, the output power of the second LED module 22 due to the second control dimming signal increases to 30%. If it continuously varies beyond , the control unit 340 continuously reduces the output power of the first LED module 21 from 70% and the output power of the second LED module 22 by the second control dimming signal. Continuously increases according to the input dimming signal, but is controlled to prevent the output power from exceeding the rated power.

In the above, when the variable input dimming signal is gradually increased, the fixed input dimming signal is gradually lowered in accordance with the variable input input dimming signal.

According to the present invention, the output applied to all LED modules can be controlled so that it does not exceed the maximum output while driving two groups of LED modules using one converter, which has the advantage of ensuring the stability of the LED module. there is.

The auxiliary power unit 500 supplies power output from the power conversion unit 100 to an external device (or module), etc. Here, the external device may include sensors such as temperature sensors, illuminance sensors, and human body detection sensors, external lighting, and alarm devices.

The preferred embodiments of the present invention described above have been disclosed to solve technical problems, and those skilled in the art can make various modifications, changes, additions, etc. within the spirit and scope of the present invention. This will be possible, and such modifications and changes should be considered as falling within the scope of the claims below.

1: Converter 20: LED module
21: 1st LED module 22: 2nd LED module
100: Power conversion unit 110: Filter circuit
120: rectifier circuit 130: PWM circuit
140: Transformer 150: Constant voltage output circuit
160: Feedback 200: LED driver
210: 1st LED driving module 220: 2nd LED driving module
300: protection circuit unit 301: first signal input terminal
302: second signal input terminal 303: control protection module
304: first signal output terminal 305: second signal output terminal
310: judgment unit 320: control signal generation unit
330: comparison unit 340: control unit
400: Dimming signal input unit 410: First dimming signal input module
420: Second dimming signal input module 500: Auxiliary power unit

Claims (10)

A power conversion unit that converts alternating current power into direct current power;
An LED driving unit comprising a first LED driving module that drives the first LED module with the direct current power converted by the power conversion unit and a second LED driving module that drives the second LED module;
a protection circuit unit that converts a dimming signal applied from the outside and outputs a control dimming signal including a first control dimming signal and a second control dimming signal; and
A first dimming signal input module that receives the first control dimming signal output from the protection circuit unit and inputs it to the first LED driving module, and receives the second control dimming signal output from the protection circuit unit to control the second LED. A dimming signal input unit including a second dimming signal input module input to the driving module;
It is composed including,
The protection circuit part,
A first signal input terminal that receives a first dimming signal from the outside;
a second signal input terminal that receives a second dimming signal from the outside;
a control protection module that generates and outputs a first control dimming signal and a second control dimming signal in response to dimming signals input from the first signal input terminal and the second signal input terminal;
a first signal output terminal that outputs a first control dimming signal output from the control protection module to the first dimming signal input module; and
a second signal output terminal that outputs a second control dimming signal output from the control protection module to the second dimming signal input module;
It consists of:
The control protection module is,
a determination unit that determines whether the dimming signal input from the first signal input terminal and the second signal input terminal is a zero-turn dimming signal or a PWM dimming signal;
Based on the dimming signal determined by the determination unit, a first control dimming signal corresponding to the first dimming signal input to the first signal input terminal is generated, and the second control dimming signal is generated based on the dimming signal determined by the determination unit. a control signal generating unit that generates a second control dimming signal corresponding to the second dimming signal input to the signal input terminal;
The output power calculated by adding the output power output from the first LED driving module by the first control dimming signal and the output power output from the second LED driving module by the second control dimming signal and the first A comparison unit that compares the rated power calculated by adding the rated power of the LED module and the rated power of the second LED module;
a control unit that controls the output power so that the output power as a result of the comparison of the comparison unit does not exceed the rated power;
A converter for LED emotional lighting comprising a. In claim 1,
The control dimming signal is,
The sum of the output power output from the first LED driving module by the first control dimming signal and the output power output by the second LED driving module by the second control dimming signal is the rated power of the first LED module. A converter for LED emotional lighting, characterized in that it is controlled not to exceed the sum of the rated power of the second LED module. delete delete In claim 1,
The control unit is,
A converter for LED emotional lighting, characterized in that when the output power as a result of the comparison of the comparison unit is less than the rated power, the generated first control dimming signal and the second control dimming signal are output. In claim 1,
The control unit is,
If the output power as a result of the comparison of the comparison unit exceeds the rated power, the generated first control dimming signal is controlled to 1/2 of the rated power of the first LED module and the generated second control dimming signal is A converter for LED emotional lighting, characterized in that it is controlled and output at 1/2 of the rated power of the first LED module. In claim 1,
The control unit is,
If the output power as a result of the comparison of the comparison unit exceeds the rated power,
A converter for LED emotional lighting, characterized in that it reduces the output power caused by a control dimming signal of a constant dimming signal in response to a variable dimming signal and controls the output power so that the output power does not exceed the rated power. In claim 1,
The dimming signal applied from the outside is,
A converter for LED emotional lighting, characterized in that it consists of a dimming signal selected from a zero-turn type dimming signal with a variable voltage of 0 to 10V and a PWM type dimming signal with pulse width modulation. In claim 8,
The protection circuit part,
A converter for LED emotional lighting, characterized in that it determines whether it is a zero-turn type dimming signal or a PWM type dimming signal, and converts it into a control dimming signal based on the determined dimming signal. In claim 1,
The first LED module is selected from a cool color LED module that emits light at a cool color temperature or a warm color LED module that emits light at a warm color temperature,
A converter for LED emotional lighting, characterized in that the second LED module consists of one not selected from the first LED module.