JP2019164935A - Led lighting control auxiliary apparatus and led lighting control system - Google Patents

Abstract

To eliminate various problems, such as flashing, flickering, uncontrollability, and compatibility, by simply attaching to an existing LED lighting control system.SOLUTION: In an LED lighting control auxiliary apparatus used by connecting with an LED lighting control system including a dimmer capable of adjusting the light volume of LED lighting equipment, the dimmer adjusts the light volume of the LED lighting equipment by using a triac element, the LED lighting control auxiliary apparatus has voltage-controlled switch means having input side connected with a commercial power supply and the dimmer, and the output side connected with the LED lighting equipment, and stopping power supply to the LED lighting equipment when the absolute value of voltage of the dimmer drops to a prescribed value, and the impedance of the LED lighting control auxiliary apparatus is formed of resistance component, when viewing from the input side.SELECTED DRAWING: Figure 7

Description

  The present invention relates to an LED dimming auxiliary device used in an LED dimming system capable of adjusting the illumination intensity (light quantity) of an LED lighting tool, and an LED dimming system including the LED illumination dimming auxiliary device.

  Currently, LED lighting fixtures such as LED bulbs are rapidly spreading as an alternative to conventional lighting elements such as filament-type bulbs because of their low power consumption and long life. By the way, in various illuminating devices, adjusting illumination intensity (light quantity) according to various situations is performed. Conventional filament type light bulbs can be dimmed relatively easily by the phase control method, and are therefore often used for space production by lighting, display in stores, indoor lighting, and the like.

  As a dimming means for the LED illuminator, a phase control method using a triac element is generally popular and widely used. The LED lighting element used for the LED lighting device has a low voltage applied to one element, and even when a plurality of elements are used, the voltage is lower than the AC 100 V that is a commercial power source. Therefore, many LED lighting fixtures incorporate a step-down circuit that converts the commercial power supply from 100 V AC to several DC, a constant voltage circuit, a constant current circuit, a protection circuit, and the like for stably lighting the LED.

  As described above, since various electronic circuits are incorporated in the LED lighting device, it is not possible to perform light control as in a filament type light bulb with a conventional light control device. In order to solve such drawbacks, various dimmable LED lighting fixtures have been developed.

  Many dimmable LED lighting fixtures have been proposed for the disadvantages due to low power consumption. However, such a dimmable LED illuminator cannot perform stable dimming control such as blinking or blinking when dimming, or when using an existing dimming device, It is known that compatibility problems occur between the lighting fixture and the light control device.

Patent Document 1 discloses a light control device that has a problem of light control in a light control device such as an electronic transformer or an LED when a capacitive load is used. The light control device disclosed in Patent Document 1 is:
Zero cross detection means for outputting a zero cross signal if the input voltage from the AC power source is a predetermined range near the zero cross,
Zero-cross determination means that counts the signal width of the zero-cross signal output from the zero-cross detection means and determines the zero-cross signal as the zero cross of the AC power supply waveform if the count value is equal to or greater than a predetermined reference value;
A dimming control means for performing phase control of a DC trigger system that continues to provide a drive voltage for driving the bidirectional switching element during an ON period set in synchronization with the zero cross signal determined by the zero cross determination means;
The dimming control means turns off the drive voltage before the next zero cross estimated from the zero cross signal determined by the zero cross determination means,
The zero-cross determination means is characterized in that the zero-cross signal output from the zero-cross detection means is invalidated after the zero-cross signal is determined and before the dimming control means turns off the drive voltage.

Japanese Patent No. 5661708

  In the light control device described in Patent Document 1, various means such as a zero-cross determining means and a light control device need to be configured by a microcomputer in the light control device. Therefore, it is necessary to replace the light control device itself in order to solve the flashing, blinking, inability to control light, or compatibility problems with the LED lighting device. Therefore, significant construction is required and the cost is expected to be high.

  The present invention has been made in view of such a situation. By simply installing an LED illumination dimming auxiliary device in an existing system, the present invention aims to solve the problems in the conventional LED illumination dimming system and perform appropriate dimming. The purpose is to make it possible.

Therefore, the LED illumination dimming auxiliary device according to the present invention is
An LED illumination dimming auxiliary device used by connecting to an LED illumination dimming system provided with a dimming device capable of adjusting the amount of light of the LED lighting tool,
The light control device uses a triac element to adjust the light intensity of the LED lighting fixture,
The LED lighting dimming auxiliary device has an input side connected to a commercial power source and a dimming device, and an output side connected to an LED lighting tool.
When the absolute value of the voltage of the light control device drops to a predetermined value, the voltage control type switch means for stopping the power supply to the LED lighting device,
The impedance when the LED illumination dimming auxiliary device is viewed from the input side is formed by a resistance component.

Furthermore, in the LED illumination dimming auxiliary device according to the present invention,
The voltage control type switch means is a photocoupler,
LED lighting dimming assist device
A first rectifier provided in front of the photocoupler;
And a second rectifier provided at a subsequent stage of the photocoupler.

Furthermore, in the LED illumination dimming auxiliary device according to the present invention,
The resistance component of the LED illumination dimming auxiliary device is formed by a constant current circuit.

Furthermore, in the LED illumination dimming auxiliary device according to the present invention,
It is used by being connected to an LED lighting dimming system including a plurality of LED lighting tools.

Moreover, the LED illumination dimming system according to the present invention includes:
A light control device that adjusts the amount of light of the LED lighting device using a triac element;
Provided with an LED lighting dimming auxiliary device whose input side is connected to a commercial power source and a dimming device, and whose output side is connected to an LED lighting tool,
LED lighting dimming assist device
When the absolute value of the voltage of the dimming device drops to a predetermined value, the LED lighting dimming auxiliary device having a voltage control type switch means for stopping the power supply to the LED lighting tool
The impedance when the LED illumination dimming auxiliary device is viewed from the input side is formed by a resistance component.

  According to the LED illumination dimming assist device and the LED illumination dimming system according to the present invention, adding an LED illumination dimming assist device to an existing LED dimming illumination system has conventionally been a problem. It becomes possible to eliminate flashing, flickering, inability to adjust light, or compatibility problems with LED lighting tools during dimming. At that time, since the impedance when the LED illumination dimming auxiliary device is viewed from the input side, that is, the dimming device side is formed of a resistance component, the LED lighting dimming auxiliary device functions and the LED Akiakicho Ko auxiliary device Therefore, it is possible to suppress the phase shift caused by the addition of light and appropriately perform light control by the light control device. Moreover, since it is not necessary to replace the dimming device of the existing LED dimming illumination system, it is possible to provide a solution to the problem with reduced costs.

The figure which shows the conventional LED illumination light control system The figure which shows the detail of the conventional LED illumination light control system Diagram for explaining dimming using a triac element The figure for demonstrating the phase change at the time of using an LED lighting fixture Diagram for explaining problems in dimming using a triac element The figure which shows the LED illumination light control system of this embodiment The block diagram which shows the structure of the auxiliary | assistant apparatus of this embodiment. The figure for demonstrating the light control of the LED illumination light control system of this embodiment

  FIG. 1 is a diagram illustrating a conventional LED illumination dimming system. The LED illumination dimming system includes a controller 2 having a switch function and a dimming function, and a light bulb socket 31 for connecting an LED light bulb 32 as an LED illumination tool. One electrode of the light bulb socket 31 is connected to one electrode of the commercial power source 1. The other electrode of the light bulb socket 31 is connected to the other electrode of the commercial power source 1 with the controller 2 interposed therebetween.

  The controller 2 includes a switch 21b for turning on / off the LED bulb 32 and a dimming dial 21a for adjusting the light quantity of the LED bulb 32. By operating the switch 21b and the dimming dial 21a, it is possible to switch the lighting state of the LED bulb 32 and adjust the amount of light at the time of lighting.

  The controller 2 includes a light control device for adjusting the light quantity of the LED bulb 32. This light control device adjusts the light quantity of the LED bulb 32 by a triac element.

  FIG. 2 is a diagram showing details of a conventional LED illumination dimming system, and is mainly a diagram for explaining an internal configuration of a controller 2 that is generally used. The controller 2 includes a switch 21b for switching on and off, and a light control device 22 for adjusting the light quantity of the LED bulb 32.

  The light control device 22 includes a triac element 221, a trigger diode 222, a variable resistor 223, and a capacitor 224. The resistance value of the variable resistor 223 is changed by operating the dimming dial 21a. When the switch 21b is turned on, the commercial power source 1 starts to accumulate charges in the capacitor 224. When the voltage value applied to the trigger diode 222 exceeds the threshold value VBO of the trigger diode 222 due to the electric charge accumulated in the capacitor 224, a gate signal for lighting the LED bulb 32 is given to the gate G of the triac element 221.

  The triac element 221 is an element that electrically connects the electrodes (referred to as turn-on) when a gate signal (current) is applied to the gate G thereof. Then, once the triac element is turned on, as long as there is a current flowing between the electrodes, it continues to be turned on regardless of the presence or absence of the gate signal. When the current flowing between the electrodes becomes “0”, it shifts to a non-conductive state, which is called turn-off. Suitable for phase control is that there is always a time when the current becomes “0” at the zero cross point where the polarity of the voltage applied between the electrodes changes at a fixed frequency in the AC power source. This is because there is always an opportunity to turn off at a predetermined time (every half cycle). Therefore, the amount of current to be conducted can be controlled only by the timing of the gate signal.

  When the resistance value of the variable resistor 223 is small, electric charge is rapidly stored in the capacitor 224, the time to reach the threshold value VBO of the capacitor 224 is shortened, and the triac element 221 is turned on early. On the other hand, when the resistance value of the variable resistor 223 is large, the time for reaching the threshold value VBO of the capacitor 224 also becomes long, and the triac element 221 is turned on late. The triac element 221 that is in the on state, that is, the state in which the LED bulb 32 is lit, is ideally turned off when the commercial power source 1 crosses zero.

  FIG. 3 is a diagram for explaining dimming using the triac element, and is a diagram illustrating a current waveform adjusted by the dimming device 22 and applied to the LED bulb 32. In FIG. 3A, when the turn-on is performed at time T1, the turn-off is performed at time Toff, which is the next zero crossing point, and a period from time T1 to time Toff is a conduction period. As shown in FIG. 3B, when the turn-on phase is changed and the turn-on is performed at time T2, the conduction time is shorter than when the turn-on is performed at time T1 as shown in FIG. In either case of time T1 and time T2, the area of the period indicated by hatching can be considered as the electric power given to the load (LED bulb 32). Therefore, by controlling the turn-on time (phase control), it is possible to change the power supplied to the load (LED bulb 32) and adjust the light quantity of the LED bulb 32.

  By the way, a commercial power source is a sinusoidal AC power source, and it is easy to understand when the relationship between voltage and current is generally represented by a sine curve. FIG. 4 is a diagram for explaining a phase change when the LED lighting tool is used. As shown in FIG. 4A, in the AC power supply, when a pure resistance is connected as a load, the phases of the voltage and the current match. The so-called incandescent lamp is a filament type light bulb, and its property is a resistance load.

  By the way, in order to obtain a required voltage (the voltage required for the LED bulb 32 to emit light is several volts), an LED lighting device such as the LED bulb 32 has a built-in step-down circuit. To configure these step-down circuits, an electronic circuit is required regardless of the scale. In this case, the possibility of adopting only the pure resistance component is low from the viewpoint of efficiency. This indicates that the LED bulb 32 does not become a pure resistance load as a real problem. Although it is difficult to specify whether the various LED bulbs 32 belong to capacitive or inductive, and the size of the capacitive or inductive component, it can be said that they have any characteristic. The magnitude appears as a vector of resistance component, capacitance component, and induction component. In addition, the size of the component may be conspicuous depending on the number and type of bulbs to be connected.

  FIG. 4B is a diagram showing the relationship between voltage and phase in a pure capacitive (capacitor component) load. The phase of voltage and current does not match, and the current advances 90 degrees from the voltage. On the other hand, FIG. 4C is a diagram showing the relationship between current and phase in a purely inductive (inductance component) load. The voltage and current phase do not match, and the current is delayed by 90 degrees from the voltage. This is well known as the basics of electrical theory, but the important point is that current flows even when the voltage is “0”.

  Here, the applicant has found that problems such as blinking and blinking of the LED bulb 32 when using the light control device 22 are greatly dependent on the conduction phenomenon due to the rate of increase in the critical off voltage during commutation of the triac element 221. . The rate of increase in the critical off voltage at the time of commutation is the rate of increase of the voltage applied between the electrodes of the triac element 221. For example, the rate of increase in voltage immediately after the current becomes zero (immediately after turn-off) is a specified value. If it is above, the triac element 221 will be in a conductive state even though no gate signal is applied. Such a conduction phenomenon makes the dimming control unstable, such as making the LED bulb 32 to be dimmable incapable of dimming, blinking, or blinking. Such a problem is often cleared up with a compatibility problem between the LED bulb 32 and the light control device 22.

  FIG. 5 is a diagram for explaining problems in dimming using the triac element 221, and is a time for the voltage V and current I applied to the LED bulb 32 showing an inductive load having a leading phase of about 15 degrees. It is the figure which showed the change. As indicated by a circle 1, when a signal is applied to the gate G of the triac element 221 at the turn-on time T1 of the triac element 221, the triac element 221 starts to conduct. As indicated by a circle 2, since the current value becomes “0” at time Toff1, the triac element 221 is turned off. This is a desired operation at the time of design, and the LED bulb 32 operates properly by repeating such an operation.

  Here, at the time of circle 2, because of the inductive load of the LED bulb 32, the voltage value is “0” at time Toff1, but the conduction current is not “0”. The critical off-voltage rise rate at the time of commutation at this time is Ma. At time Toff1, the critical off-voltage increase rate Ma at the time of commutation did not cause the conduction phenomenon of the triac element 221 used in the dimmer 22 but the conduction phenomenon occurred depending on the rate of increase of the critical off-voltage at the time of commutation. There is a case to let you. As indicated by circle 3 as the next cycle, a voltage is applied to the gate G of the triac element 221 at the turn-on time T2 of the triac element 221, and the triac element 221 resumes conduction. Then, since the current value becomes “0” at time Toff2 indicated by the circle 4, the conduction is interrupted as indicated by the circle 2 under normal circumstances. However, the conduction phenomenon occurs because the critical off-voltage increase rate Mb during commutation at time Toff2 exceeds the allowable range of the triac element 221 used in the dimmer. In this case, it cannot be turned off at the time Toff2 indicated by the circle 4, and the conductive state is maintained, and the LED bulb 32 is kept in the lighting state until the turn-on time T3 of the next cycle.

  Thereafter, as indicated by a circle 5, at the time Toff3 when the conduction current becomes “0”, the critical off-voltage increase rate Mc at the time of commutation is within an allowable range, so that the triac element 221 is normally turned off, and the LED bulb 32 is turned off. When such a conduction phenomenon due to the critical off-voltage increase rate at the time of commutation of the TRIAC element 221 appears at random, the LED bulb 32 appears to blink and blink. In addition, when a conduction phenomenon occurs at all times, the LED bulb 32 appears to be dimmable. Such a conduction phenomenon occurs due to the relationship between the light control device 22 to be used and the LED bulb 32 (LED illuminator), so that it is recognized as a so-called compatibility problem. There was only correspondence such as exchange.

  In the LED illumination dimming system that performs dimming by using the dimming device 22 using the triac element 221, the present invention does not cause blinking, flickering, and dimming disabled during dimming. The purpose is to make it possible to select and purchase the LED bulb 32 (LED lighting tool) without worrying about compatibility with the light control device 22.

  FIG. 6 is a diagram illustrating the LED illumination dimming system of the present embodiment. Although the conventional LED illumination dimming system has been described with reference to FIG. 1, the LED illumination dimming system of this embodiment is an auxiliary device 4 (the “LED illumination dimming auxiliary device” of the present invention). Equivalent)). As described above, the present invention suppresses the conduction phenomenon of the triac element 221 by adding the auxiliary device 4 to the conventional LED illumination dimming system without modifying the controller 2 (the dimming device 22). It is possible to eliminate flashing, blinking, inability to adjust light, or compatibility problems during light. The auxiliary device 4 is disposed between the controller 2 and the light bulb socket 31. In the present embodiment, one LED bulb 32 is provided by one auxiliary device 4, but a plurality of LED bulbs 32 may be provided by one auxiliary device 4. A form that covers the plurality of LED bulbs 32 will be described later.

  FIG. 7 is a block diagram showing a configuration for explaining the auxiliary device 4 of the present embodiment. First, the controller 2 will be described. As described with reference to FIG. 1, the controller 2 includes a dimming dial 21a and a switch 21b as operation means. The dimming dial 21a is a member that adjusts the amount of light of the LED bulb 32 (LED lighting tool) to be controlled, and is configured as a rotatable dial in this embodiment. The rotation amount of the dimming dial 21 a is transmitted to the dimming device 22, and the light amount of the LED bulb 32 is adjusted by the dimming device 22. The light control device 22 performs light amount control using the triac element 221 as described with reference to FIG. The switch 21b opens and closes the circuit formed by the commercial power source 1 to turn on (turn on) and turn off (turn off) the LED bulb 32.

  The auxiliary device 4 includes a bleeder resistor 42, a rectifier 43, a constant current circuit 44, a photocoupler 45, a transistor 46, an AC switch 47, a surge absorber 48, and a fuse 49. The first connection terminal 41a and the second connection terminal 41b of the auxiliary device 4 are connected to the commercial power source 1 and the controller 2 side, and the third connection terminal 50a and the fourth connection terminal 50b are connected to the LED bulb 32 side.

  In the present embodiment, the auxiliary device 4 is newly provided. However, if the current flowing through the light control device 22 is cut off by providing the auxiliary device 4, the light control device 22 stops functioning. End up. Therefore, the auxiliary device 4 of the present embodiment is characterized in that the impedance when viewed from the input side, that is, the light control device 22 side, is formed of a resistance component. Here, the resistance component refers to a component that hardly includes a capacitor component or an inductance component, and whose current phase substantially follows the applied voltage. By forming the impedance with the resistance component in this manner, the light control device 22 can be made to function by being energized, and the light control device 22 can function properly without causing a phase shift.

  The resistance component in the present embodiment is mainly formed by a bleeder resistor 42 and a resistor 44 b of the constant current circuit 33. It is also possible to form a resistance component using one of the bleeder resistor 42 and the constant current circuit 33. In the present embodiment, by using the constant current circuit 33, it is possible to suppress the amount of power used in the auxiliary device 4. When the constant current circuit 44 is not used, the resistor 44b, the transistor 44c, and the Zener diode 44d are removed and the resistor 44e is connected to the light emitting diode 45a. However, the constant current circuit 44 is compared with the case where the constant current circuit 44 is not provided. As a result, the amount of power used increases.

  In this embodiment, since the photocoupler 45 is used as the voltage control type switching means, it is necessary to rectify the voltage applied by the commercial power source 1 and the dimmer 22 in the same direction. The rectifier 43 is provided in front of the photocoupler 45 and outputs a voltage Vac for controlling the photocoupler 45.

  A constant current circuit 44 is provided after the rectifier 43. The constant current circuit 44 includes Zener diodes 44a and 44d, resistors 44b and 44e, and a transistor 44c, and limits the current flowing through the photocoupler 45 mainly by the characteristics of the Zener diode 44a. Specifically, it has a characteristic of supplying a substantially constant current value to the photocoupler 45 when the voltage applied to the Zener diode 44a is equal to or higher than a predetermined value (Zener voltage Vz). The constant current circuit 44 always flows a constant current at an input voltage exceeding the voltage obtained by adding the Zener voltage Vz of the Zener diode 44a and the drop voltage of the rectifier 43. It effectively works to increase the current, and also works to reduce capacitive loads and inductive loads. The constant current circuit 44 is a circuit provided for stabilizing the operation of the auxiliary device 4 and can be omitted.

  The photocoupler 45 includes a light emitting diode 45a that emits light with a current supplied from the constant current circuit 44, and a photodiode 45b that is turned on by receiving light from the light emitting diode 45a. The photocoupler 45 functions as voltage control type switching means, and is means for eliminating the conduction phenomenon of the dimmer 22 using the above-described triac element.

  The transistor 46 functions as an amplifying unit that amplifies the output of the photodiode 45b. The amplified output switches the subsequent AC switch 47. Note that the transistor 46 is an element provided for realizing a stable operation, and is not necessarily provided. Further, in this embodiment, the transistor 46 is connected to the output of the photocoupler 45 by Darlington connection so as to increase the withstand voltage of the AC switch 47. An FET may be used or an IGBT may be used.

  The AC switch 47 is a circuit provided to control the voltage in both positive and negative directions supplied by the commercial power source 1 and the dimmer 22 using the output in one direction of the photodiode 45b. Therefore, in the photocoupler 45, when the photodiode 45b is turned on by the light emission of the light emitting diode 45a, that is, when the circuit formed by the photodiode 45b becomes conductive, the commercial power supply 1 applied to the AC switch 47 and the dimmer 22 Is in a state where it is output to the latter stage, that is, the LED bulb 32 side in both directions.

  The surge absorber 48 is an element provided for mitigating surge current due to the switching operation of the AC switch 47. The fuse 49 is an element provided for protecting the LED lighting dimming system when a current exceeding the rating flows.

  The operation of the LED illumination dimming system provided with such an auxiliary device 4 will be described. FIG. 8 is a diagram for explaining the dimming of the LED illumination dimming system of the present embodiment, and similarly to FIG. 5, the voltage applied to the LED bulb 32 showing an inductive load around the leading phase of 15 degrees. It is the figure which showed the time change of V and the electric current I. FIG.

  When the switch 21b is turned on and a gate signal is applied to the triac element in the light control device 22, the AC voltage of the commercial power source 1 that is the output of the light control device 22 is applied to the first connection terminal 41a and the second connection terminal 41b. Applied. The AC voltage applied to the first connection terminal 41a and the second connection terminal 41b is half-wave rectified by the rectifier 43 to generate a rectified output Vac. When the rectified output Vac exceeds the Zener voltage Vz of the Zener diode 44a, a drive voltage is applied to the light emitting diode 45a in the photocoupler 45. When the constant current circuit 44 is used, the light emitting diode 45a in the photocoupler 45 is caused to emit light with a constant current regardless of the conduction angle.

  When the voltage applied to the photocoupler 45 reaches the photocoupler voltage, the AC switch 47 is turned on, and the first connection terminal 41a and the third connection terminal 50a are closed. 1 AC power is supplied (at the time of circle 1, circle 3, circle 5, and circle 7 in FIG. 8).

  On the other hand, since the voltage Vac does not reach the Zener voltage Vz of the Zener diode 44a at the zero crossing point of the voltage, the light-emitting diode 45a in the photocoupler 45 is turned off, that is, does not reach the photocoupler voltage of the photocoupler 45. Turns off. Therefore, the space between the first connection terminal 41a and the third connection terminal 50a is released, and power supply to the LED bulb 32 is stopped. (Times of circle 2, circle 4, circle 6 and circle 8 in FIG. 8).

  Here, the circuit composed of the bleeder resistor 42, the rectifier 43, and the constant current circuit 44 is a closed circuit of a resistive load connected to the commercial power source 1, so that the phase angle of the voltage and current of the commercial power source 1 coincides. Yes. Accordingly, the photocoupler 45 can be turned on and off in synchronization with the applied voltage. That is, the AC switch 47 is always turned off when the applied voltage is zero-crossed.

  As described above, the LED illumination dimming system according to the present embodiment has the LED light bulb 32 and the like generated in the conventional system by a simple configuration in which the auxiliary device 4 having the voltage control type switch means is connected to the conventional system. It becomes possible to eliminate the blinking, flickering, inability to adjust light, or compatibility problems between the light control device 22 and the LED lighting device. In this embodiment, the photocoupler 45 is used as the voltage control type switch means. However, the voltage control type switch means stops the power supply to the LED lighting device when the voltage of the light control device 22 crosses zero. Any means that can be used is not limited to the photocoupler 45 described in this embodiment, and various means can be employed. In addition, the voltage control type switch means supplies power to the LED lighting device not only when the voltage of the dimmer 22 crosses zero but also when the absolute value of the voltage of the dimmer 22 drops to a predetermined value. It may stop.

  In the present embodiment, one LED bulb 32 is covered with one auxiliary device 4, but a plurality of LED bulbs 32 may be covered. When covering a plurality of LED bulbs 32, each LED illuminator is connected to the third connection terminal 50a and the fourth connection terminal 50b of the auxiliary device 4, that is, by connecting each LED illuminator to the auxiliary device 4 in parallel, The dimming device 22 can dimm each LED illumination tool appropriately.

1: Commercial power supply 44c: Transistor 2: Controller 45: Photocoupler 4: Auxiliary device 45a: Light emitting diode 21a: Dimming dial 45b: Photodiode 21b: Switch 46: Transistor 22: Dimming device 47: AC switch 31: Light bulb socket 48: Surge absorber 32: LED bulb 49: Fuse 41a: First connection terminal 50a: Third connection terminal 41b: Second connection terminal 50b: Fourth connection terminal 42: Breeder resistor 221: Triac element 43: Rectifier 222: Trigger diode 44: constant current circuit 223: variable resistors 44a, 44d: Zener diode 224: capacitors 44b, 44e: resistors

Claims (5)

An LED illumination dimming auxiliary device used by connecting to an LED illumination dimming system provided with a dimming device capable of adjusting the amount of light of the LED lighting tool,
The light control device uses a triac element to adjust the light intensity of the LED lighting fixture,
The LED lighting dimming auxiliary device has an input side connected to a commercial power source and a dimming device, and an output side connected to an LED lighting tool.
When the absolute value of the voltage of the light control device drops to a predetermined value, the voltage control type switch means for stopping the power supply to the LED lighting device,
Impedance when the LED illumination dimming auxiliary device is viewed from the input side is formed of a resistance component. LED illumination dimming auxiliary device. The voltage control type switch means is a photocoupler,
LED lighting dimming assist device
A first rectifier provided in front of the photocoupler;
The LED illumination dimming assistance device according to claim 1, further comprising: a second rectifier provided at a subsequent stage of the photocoupler. The LED illumination dimming assistance device according to claim 1, wherein the resistance component of the LED illumination dimming assistance device is formed by a constant current circuit. The LED illumination dimming assistance device according to any one of claims 1 to 3, wherein the LED illumination dimming system is used by being connected to an LED illumination dimming system including a plurality of LED illuminators. A light control device that adjusts the amount of light of the LED lighting device using a triac element;
Provided with an LED lighting dimming auxiliary device whose input side is connected to a commercial power source and a dimming device, and whose output side is connected to an LED lighting tool,
LED lighting dimming assist device
When the absolute value of the voltage of the dimming device drops to a predetermined value, the LED lighting dimming auxiliary device having a voltage control type switch means for stopping the power supply to the LED lighting tool
The impedance when the LED illumination dimming auxiliary device is viewed from the input side is formed by a resistance component.