KR102518713B1 - Modular led lighting device driven by adapting to state change of led module - Google Patents

Abstract

The present invention relates to a modularized LED lighting equipment. Specifically, the present invention relates to the modularized LED lighting equipment that, when some LED modules are damaged while in a usage process of an LED lighting equipment equipped with a modularized light source, enables maintenance to be easily performed by replacing only the damaged LED module, detects a state change regarding the damage and restoration (replacement) of the LED module without an additional wiring, and prevents a series of damages to the LED module by adaptively driving to continuously supply a constant current to a normally operating LED module. The modularized LED lighting equipment comprises: an LED light source; and a modular LED driving part.

Description

Modular LED lighting device that adapts to and drives LED module status changes {MODULAR LED LIGHTING DEVICE DRIVEN BY ADAPTING TO STATE CHANGE OF LED MODULE}

The present invention relates to a modularized LED lighting device, and more particularly, when some LED modules are damaged in the process of using an LED lighting device having a modularized light source, maintenance can be easily performed by replacing only the damaged LED module. In addition, without additional wiring, damage to the LED module and status change for recovery (replacement) are detected and adaptively driven to continuously supply a constant current to the normally operating LED module. It relates to a modularized LED lighting device that prevents damage.

Fluorescent lamps and incandescent lamps are widely used as lighting devices, but since fluorescent lamps generate less heat and are more efficient than incandescent lamps, fluorescent lamps are mainly used for lighting at home or offices.

However, since fluorescent lamps have disadvantages of low illuminance and low energy efficiency, recently, LED lighting has been widely used as a lamp having relatively high illuminance and low power consumption.

The main technologies related to LED lighting devices are LED light sources and LED converters including electronic power converters (SMPS), and since LED light sources and LED converters react sensitively to the external environment, they cause many defects.

In the case of indoor LED lighting fixtures, since at least one LED module in which a plurality of LEDs are arranged vertically or horizontally is mounted and used, if at least one of the plurality of LED modules is defective or malfunctions, Instead of replacing only a specific LED module with a defect or malfunction, the entire LED module had to be replaced.

Accordingly, there is a problem in that the cost required for maintenance increases. In particular, since more costs are required for maintenance when installed outdoors instead of indoors, various technologies are being developed to solve this problem. In practice, a replaceable standard LED module is used to reflect the situation in which there are many cases of defective LED modules, but this is not a fundamental solution to the problem, but only a stopgap.

In order to solve the immediate problems of LED lighting equipment, firstly, it is necessary to improve the light efficiency and life span of LED lamps, and secondly, it is necessary to extend the lifespan of the power supply device that supplies power to the LED lamps, that is, to extend the lifespan of the LED driving circuit and improve the input/output efficiency, Third, it is necessary to improve the heat dissipation performance of lighting devices to quickly dissipate heat generated from each LED module into the air.

More specifically, the LED light source is composed of a plurality of modules or one module. Each module is more specifically composed of several LED packages, which are connected in series and parallel. In addition, the electrical part of the LED lighting fixture is a constant current driver and an LED package part. If mismatching occurs between these components, each component may not exhibit correct characteristics or may cause damage to the electrical component.

When such a mismatch occurs, module components are opened for unintended reasons during use and are not connected, and in the manufacturing sector, the deviation of output power according to the forward voltage (Vf) of the LED package is required to satisfy the management standard. In order to manage the Vf of the LED during production, but due to the nature of the supplied LED package, if it is out of the management standard, inefficiency arises in that only the LED Vf must be used.

In addition, as a phenomenon that occurs when such a mismatch occurs, first, when a mismatch occurs while using a lighting device, the number of parallel LED modules is reduced. This is because the damage of a specific LED module occurs first in the serial part in the LED package, but even if the LED package is shorted, it proceeds to open over time. In addition, when the number of LED modules in parallel decreases, the total applied current is applied to the remaining parallel modules, so the additional current is applied to the LED package, which leads to heat generation and weakening of durability.

Next, in the manufacturing sector, there are several types of forward voltages (Vf Rank) for LED packages. In this case, a problem arises in that the corresponding light source cannot be used or the output current of the driving device must be additionally adjusted.

Since the development of technology to improve the efficiency of LED lighting has already reached a significant level, products with long lifespan that are thermally safe and durable while ensuring the light performance required by users even in poor lighting environments are currently being developed rather than high-efficiency products. are needing

In other words, the biggest advantages of LED lighting are energy saving, long lifespan, and eco-friendliness, and energy-saving and eco-friendly technologies to highlight these advantages are already at a high level, but the technology to increase durability is still in demand. It is not reaching the required level.

In other words, consumers are demanding a product that can guarantee a service life of about 10 years or about 100,000 hours, but the reality is not up to this.

In the present invention, in order to further secure the durability of the LED lighting device, by adjusting the forward voltage and current of the LED module, a predetermined constant current is supplied to the normal module to prevent chain failure of the normal LED module and configure the LED lighting device Instead of having to replace each LED module as a whole, maintenance can be easily performed by replacing only a specific LED module that has a failure or defect.

In addition, in the present invention, when some LED modules are damaged in the process of using an LED lighting device having a modularized light source, it operates normally by adapting to the damage or recovery of the LED module without adding a separate wire to detect the damage to the LED module. By supplying a constant current to the LED module to drive it, it is intended to suggest a method of enhancing durability by preventing chain damage of the LED module.

More specifically, when a mismatch occurs, first, when a mismatch occurs while using a lighting device, since the number of LED modules in parallel is reduced, a voltage rise due to the applied current occurs and power rises above the design value. In addition, depending on the forward voltage (Vf Rank) characteristics of the LED package applied in the manufacturing process, the rated power may increase or decrease. In this case, since the voltage applied to the LED light source fluctuates, the problem is to be solved by detecting this and controlling the constant current applied to the LED module.

Next, the prior art existing in the technical field of the present invention will be briefly described, and then the technical details to be achieved by the present invention to be differentiated from the prior art will be described.

First, Korean Patent Registration No. 1939633 (2019.01.11.) relates to an LED lighting device with a modularized light source. In the process of using an LED lighting device with a plurality of LED modules built-in, some LED modules may fail or fail. The present invention relates to an LED lighting device having a modularized light source capable of easily performing maintenance by replacing only a specific LED module in which a malfunction or defect occurs without having to replace the entire unit even if it occurs.

In addition, Korean Patent Registration No. 2291817 (August 13, 2021) relates to an LED driving circuit for lighting that adjusts the supply current according to the number of LED modules that can be driven. It is characterized in that the output current is down-regulated according to the voltage level of the module open detection signal indicating the number of open LED modules by collecting the detection voltages.

Each of the above prior arts is configured by modularizing the LED lighting device, and when a specific LED module fails, only the corresponding LED module can be replaced and used, so maintenance is easy, and the output current of the constant current source is adjusted by detecting the failed LED module. This is to prevent damage to the LED module. In particular, Korean Patent Registration No. 2291817 detects whether or not a specific LED module is open in a plurality of LED modules from the light source side, so when the converter and the light source of the LED module are installed separately, such as in a street light, the LED is driven by detecting the open state. There is a disadvantage of requiring a separate control line to transfer to the device.

In addition, International Patent Publication No. 2013/133547 A1 (2013.09.12.) relates to a driving circuit for LED lighting using a constant current circuit on the load side, and if the rectified voltage does not exceed a specific voltage value, the output of the rectifier circuit is sent to the load side as it is. It is intended to improve the efficiency of LED lighting by controlling to supply, and if it exceeds, the operation of blocking the output of the rectifier circuit and the operation of passing through the output of the rectifier circuit as it is are repeated.

In addition, Korean Patent Publication No. 2004-0110987 (2004.12.31.) relates to a variable output constant current source circuit, which can change the output current step by step, thereby preventing the complexity of the circuit and the increase in size of the semiconductor substrate on which it is mounted. there is.

Contrary to the prior art discussed above, in the present invention, in the power supply device (converter) provided separately from the LED light source lamp (load) equipped with a plurality of LED modules without a separate control line, some of the plurality of LED modules By monitoring the change in the impedance (or voltage, current) of the load depending on the failure of the LED, by detecting whether there is a failure in some of the plurality of LED modules and adaptively adjusting and supplying the output of the constant current source accordingly, LED The durability is improved by preventing additional damage to the module, and the output of the constant current source is automatically readjusted when the failed LED module is replaced and restored, thereby increasing the convenience of maintenance and increasing durability. Therefore, it will be said that the difference between the present invention and the prior arts discussed above is obvious in their purpose, configuration and effect.

The present invention has been created to solve the above problems, and an object of the present invention is to provide a modularized LED lighting device that drives by adapting to the state change of the LED module.

In addition, an object of the present invention is to enable simple maintenance by replacing only the damaged LED modules when some LED modules are damaged in the process of using a modularized LED lighting device.

In addition, an object of the present invention is to increase durability by preventing an LED module from being damaged by inrush current and abnormal voltage (surge and lightning) that may normally occur in a poor lighting environment through a surge protection circuit.

In addition, the present invention detects the damage of the LED module and the state change for recovery (replacement) without additional wiring and adaptively drives the LED module to continuously supply a constant current to the normally operating LED module, thereby causing chain damage to the LED module. is aimed at preventing That is, another object is to automatically adjust the output of the constant current source again when the failed LED module is replaced and restored.

In addition, an object of the present invention is to improve the efficiency of LED lighting by controlling the output current of a constant current source to reduce input/output loss, as well as to extend its lifespan.

In addition, an object of the present invention is to prevent loss of the role of lighting by maintaining the function of an LED lighting device in which another LED module can operate normally when one LED module fails.

Modular LED lighting device according to an embodiment of the present invention, a plurality of LED modules connected in parallel LED light source; And a modular LED driving unit that adaptively supplies power according to the state of each of the plurality of LED modules; including, and the state of each of the plurality of LED modules provided in the LED light source in addition to the wiring for supplying the power to the separate It is characterized in that the supply of the power is adjusted adaptively by sensing in the modular LED driving unit without adding wiring.

The modularized LED lighting device is used for indoor lighting, street lighting, and special purpose lighting including ships and factories, and the LED light source composed of the plurality of LED modules is installed apart from the modular LED driving unit and is connected to a single power line. Power is supplied in common, and the modular LED driving unit can sense the state of each of the plurality of LED modules included in the LED light source without adding a separate wire other than the power supply line.

The modular LED driver may include: an LED module state detection unit for detecting a state of each of the plurality of LED modules; a driving control unit outputting a control signal to select a power source according to the detected states of the plurality of LED modules; And a switching and DC conversion unit for selecting and outputting the power converted to direct current according to the control signal output from the driving control unit.

The LED module state detection unit measures the voltage and current applied to the plurality of LED modules according to a constant current source or constant voltage source applied to the plurality of LED modules from the output terminal of the modular LED driver and periodically stores them in a memory, or a load measurement unit that calculates the impedance or admittance of the LED light source from the measured voltage and current, respectively, and periodically stores them in a memory; and a load change detection unit for reading current, voltage, impedance, or admittance or a combination thereof stored in the memory at a specific period and comparing them with current, voltage, impedance, or admittance, or a combination thereof of a previous period, to detect a change in load; It is characterized in that it includes. The power source is characterized in that either a constant current source or a constant voltage source.

The load measuring unit, when the power source is a constant current source, measures the voltage value of the output terminal, and calculates the impedance value by dividing the measured voltage value by the current value of the constant current source, or converts the measured voltage value into the constant current value. Calculating by normalizing with the current value of the source, if the power supply is a constant voltage source, measuring the current value flowing to the output terminal, and calculating the admittance value by dividing the measured current value by the voltage value of the constant voltage source; and calculating the normalized current value with the voltage value of the constant voltage source. Even if one of the admittance and impedance is calculated, the other can be calculated by taking the reciprocal.

The load change detecting unit is obtained by subtracting a specific value or a value of a previous cycle for any one of the voltage, current, impedance, or admittance stored in the memory by adding a specific value to the value of the next cycle. It is characterized in that it detects whether it is greater than or less than the value obtained by subtracting the specific value.

As a result of the detection by the load change detection unit, the driving control unit selects to lower the output of the constant current by one level and output it when the voltage value or impedance value measured in the specific period is greater than the value obtained by adding a specific value compared to the value in the previous period. and, if it is greater than the value obtained by subtracting the specific value, the output of the constant current is selected to be output by increasing the output by one level, and if it is smaller than the value obtained by subtracting the specific value, a control signal is output so as to maintain the output of the current driving constant current. As a result of the detection by the load change detection unit, if the current value or admittance value measured in the specific period is smaller than the sum of a specific value compared to the value in the previous cycle, the output of the constant voltage is lowered by one level to be output, and the specific value is selected. If it is less than the subtraction of , the output of the constant voltage is selected to increase by one level, and if it is greater than the value obtained by subtracting the specific value, a control signal is output to select to maintain the output of the current driving constant voltage.

The switching and DC conversion unit is characterized in that it selects and outputs the power converted to direct current based on the control signal output from the driving control unit.

Meanwhile, a driving method of a modular LED lighting device according to another embodiment of the present invention includes: LED module state detection step of detecting states of a plurality of LED modules in a modular LED driver; And a power supply step of adaptively supplying power to the LED light source in which the plurality of LED modules are connected in parallel according to the detected state of the LED module in the modular LED driver; includes a plurality of LED light sources provided It is characterized in that the supply of the power is adaptively adjusted by detecting the state of the LED module in the modular LED driver without adding a separate wire other than the wire for supplying the power.

The driving method of the modularized LED lighting device is configured to be used as an indoor light, a street light, and a special purpose light including a ship or a factory, and the LED light source composed of the plurality of LED modules is installed spaced apart from the modular LED driver while receiving power in common through a single power line, and being configured so that the modular LED driver can detect the status of each of the plurality of LED modules included in the LED light source without additional wiring other than the power line being added. to be characterized

The power supply step may include a driving control step of outputting a control signal to select the power of the switching and DC conversion unit according to the change in the detected load in the modular LED driver; and a switching and DC conversion step of selecting and outputting the DC-converted power based on the control signal output from the driving controller in the modular LED driver.

In addition, in the step of detecting the LED module state, the voltage and current applied to the plurality of LED modules according to the constant current source or constant voltage source applied to the plurality of LED modules from the output terminal of the modular LED driving unit are measured and periodically stored in a memory, or , Load measuring step of calculating the impedance or admittance of the LED light source, respectively, from the measured voltage and current, and periodically storing them in a memory; and detecting a load change by reading the current, voltage, impedance, or admittance or a combination thereof stored in the memory at a specific period and comparing the current, voltage, impedance, or admittance, or a combination thereof of a previous period, to detect a change in load; It is characterized in that it includes.

In addition, in the load measuring step, if the power source is a constant current source, the voltage value of the output terminal is measured, and the impedance value is calculated by dividing the measured voltage value by the current value of the constant current source, or the measured voltage value Calculating by normalizing with the current value of the constant current source, if the power source is a constant voltage source, measuring the current value flowing to the output terminal, and calculating the admittance value by dividing the measured current value by the voltage value of the constant voltage source Alternatively, it is characterized in that it comprises calculating by normalizing the measured current value with the voltage value of the constant voltage source.

In addition, the step of detecting the load change may be performed by subtracting a value of a previous period from a value of a previous period or by subtracting a particular value from a value of a next period for any one of voltage, current, impedance, or admittance stored in the memory. It is characterized in that it detects whether it is greater than one or less than the value obtained by subtracting the specific value.

In addition, in the driving control step, as a result of the detection by the load change detection unit, if the voltage value or impedance value measured in the specific period is greater than the value obtained by adding the specific value to the value in the previous period, the constant current output is lowered by one level to output the output. If it is greater than the value obtained by subtracting the specific value, the output of the constant current is selected to be output by increasing the output by one level, and if it is smaller than the value obtained by subtracting the specific value, a control signal is output to maintain the output of the current driving constant current. , As a result of the detection by the load change detection unit, if the current value or admittance value measured in the specific period is smaller than the sum of the specific value compared to the value in the previous period, the output of the constant voltage is lowered by one level to be output. If it is less than the value obtained by subtracting the specific value, the output of the constant voltage is selected to be increased by one level, and if it is greater than the value obtained by subtracting the specific value, a control signal is output to select to maintain the output of the current driving constant voltage.

As described above, according to the modularized LED lighting device of the present invention, when some LED modules are damaged in the process of using the LED lighting device having a modularized light source, maintenance can be easily performed by replacing only the damaged LED module It works.

In addition, by adding a surge protection circuit, the present invention has an effect of preventing damage to the module due to inrush current and abnormal voltage (surge and lightning strike) that may normally occur in a poor lighting environment.

In addition, the present invention has the effect of preventing chain damage of the LED module by continuously supplying a constant current to the normally operating LED module by detecting the damage of the LED module and the state change for recovery (replacement) without additional wiring. .

In addition, since the present invention automatically adjusts the output of the constant current source when the failed LED module is replaced and restored, the durability of the LED lighting device can be improved by providing the output of the constant current source that is adaptively changed to the state change of the LED module. There are possible effects.

In addition, the present invention controls the output current of the constant current source to reduce the input/output loss, thereby improving the efficiency of the LED lighting and extending its lifespan.

In addition, the present invention has an effect of not losing the role of lighting by maintaining the function of the LED lighting device that can operate normally when one LED module fails.

In addition, the present invention has the effect of improving durability by adaptively adjusting the power supply to the mismatch caused by the deviation of the manufacturing process as well as the mismatch that occurs between the power supply and the LED module during use of the LED lighting device.

1 is a view for explaining a layout configuration of a modularized LED lighting device according to an embodiment of the present invention and a connection diagram between a plurality of LED modules.
2 is a view showing an example in which a modularized LED lighting device according to an embodiment of the present invention is applied to a) indoor lighting, b) street lighting, and c) special purpose lighting, respectively.
3 is a view showing a state in which a modularized LED lighting device according to an embodiment of the present invention is connected to and driven with a modular LED driving unit without adding wires.
4 is a configuration diagram of a modular LED driving unit that drives in response to a state change of an LED module in a modular LED lighting device according to an embodiment of the present invention.
5 is a detailed block diagram of a modular power supply unit of a modular LED driving unit that drives in response to a change in state of an LED module in a modular LED lighting device according to an embodiment of the present invention.
6 is a flowchart illustrating a method of driving a modular LED lighting device through an operation of a modular LED driving unit that drives in response to a change in state of an LED module in a modular LED lighting device according to an embodiment of the present invention.
7 is a flowchart illustrating a process of detecting an LED module state and switching power supply accordingly in a method for driving a modularized LED lighting device according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a modularized LED lighting device that adapts to and drives a state change of an LED module according to the present invention will be described in detail. Like reference numerals in each figure indicate like elements. In addition, specific structural or functional descriptions of the embodiments of the present invention are merely exemplified for the purpose of explaining the embodiments according to the present invention, and unless otherwise defined, all terms used herein, including technical or scientific terms These have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in this specification, it should not be interpreted in an ideal or excessively formal meaning. It is preferable not to

The present invention relates to a modularized LED lighting device, and since the lighting device may be called a lighting device, a lighting device, or a lighting device, the name of the device should not be construed as limiting the scope of its rights. In addition, the modularized LED lighting device includes a plurality of LED modules in the LED lighting device, and each LED module is connected in parallel with each other. A plurality of LED modules do not each have an LED driving unit individually, but one modular LED lighting device has one modular LED driving unit, and the modular LED driving unit checks whether one or some of the plurality of LED modules are defective. is sensed and controls to normally supply constant current in the same way as before the failure of the LED module to the LED module that operates normally except for the failure of the LED module.

Although the present invention is described based on a constant current source, the technical characteristics of the present invention are applied as they are even when power is supplied by a constant voltage source.

In addition, although the terms impedance and admittance are used in the present invention, it can be understood that the reactance component can be ignored since ideally DC power is supplied to the LED module.

1 is a view for explaining a layout configuration of a modularized LED lighting device according to an embodiment of the present invention and a connection diagram between a plurality of LED modules.

As shown in Figure 1, the modularized LED lighting device 10 according to an embodiment of the present invention includes a LED light source 200 including a plurality of LED modules 210, each LED module 210 They are connected to each other through the connector 300, and are configured to be detachable and detachable so that replacement is convenient in case of failure. That is, when a specific LED module fails, it is configured to remove the failed LED module and replace it with a new LED module while the light is turned on.

In addition, the LED light source 200 is configured such that each LED module 210 is connected in parallel with each other. Therefore, it is a structure in which the power of the constant current source is supplied while the plurality of LED modules 210 are connected in parallel to each other. Ideally, the entire current input to the LED light source 200 of the LED lighting device 10 is equally distributed to each LED module 210 and flows.

Therefore, when a specific LED module 210 fails and becomes an open circuit, the impedance of the LED module becomes infinite and current cannot flow through the failed LED module. Therefore, when using power from a constant current source, more current flows to the other LED module as much as it does not flow to the malfunctioning LED module.

In this case, normal LED modules with more current flow have an adverse effect on durability due to excessive current flow. The present invention is to improve durability by improving these points. In addition, according to the present invention, durability is automatically improved by adaptively adjusting the power supply in the case of mismatches caused by deviations in the manufacturing process as well as mismatches occurring between the power supply and the LED module during use of the LED lighting device.

2 is a diagram showing an example of applying a modularized LED lighting device according to an embodiment of the present invention to a) indoor lighting, b) street lighting, and c) special purpose lighting, respectively.

As shown in FIG. 2 , the modularized LED lighting device 10 according to an embodiment of the present invention can be used as an indoor lighting lamp, a street lamp, and other special purpose lamps (ships, factories, etc.).

In the case of using a modularized LED lighting device as an indoor lighting as shown in (a) of FIG. 2, the distance between the LED light source and the modular LED driving unit is short, but the length of the wiring is short, but additional wiring is provided between the modular LED driving unit and the LED light source unit. If it is necessary to do this, the installation cost is high and the management is complicated, which adversely affects maintenance. Therefore, the technical feature of the modularized LED lighting device 10 according to the present invention is that it does not require additional wiring between the LED light source 200 and the LED driver 100 as a module.

In addition, when the modularized LED lighting device is used as a street light as shown in (b) of FIG. 2, the LED light source of the street light is located at a height of several meters or more, and the modular LED driver 100 is located near the ground, so the LED light source and the LED Since the distance between driving parts is long, adding wiring is more inconvenient and costly than indoor lighting from the viewpoint of installation or maintenance. Therefore, the modularized LED lighting device according to the present invention is configured not to require additional wiring between the LED light source and the LED driving unit as a module, and the effect on its technical characteristics is remarkable.

As shown in (c) of FIG. 2, even in the case of special lighting such as ship lighting, the LED driving unit 100 and the LED light source 200 may be provided remotely as a module, and wiring is added even if they are provided immediately adjacent to each other. If it has to be done, it is disadvantageous in terms of maintenance, cost, and management. Therefore, the modularized LED lighting device according to the present invention is configured not to require additional wiring between the LED light source 200 and the LED driving unit 100 as modules.

In addition, the modularized LED lighting device according to an embodiment of the present invention supplies power while adaptively changing the size of a constant current according to a failure of each of a plurality of LED modules, so that an adjacent LED module for a specific LED module eventually Durability can be ensured by allowing a constant constant current to flow at all times, whether or not there is a failure. Durability is automatically improved as the power supply is adaptively adjusted in case of inconsistency between the power supply and the LED module during use of the LED lighting device as well as inconsistency caused by deviations in the manufacturing process.

In addition, the modularized LED lighting device according to an embodiment of the present invention structurally allows the LED modules to be individually detachable, so that the broken LED module can be taken out and replaced with a new LED module while the light is on, so maintenance is convenient. In addition to this improvement, the lifespan of each LED module can be extended by detecting a change in load due to failure and attachment or detachment of the LED module to automatically change and supply the output current of the constant current source.

3 is a view showing a state in which a modularized LED lighting device according to an embodiment of the present invention is connected to and driven with a modular LED driving unit without adding wires.

As shown in Figure 3, in the modular LED lighting device 100 according to an embodiment of the present invention, the modular LED driver 100 and the LED light source 200 can be connected without adding wiring. That is, a plurality of LED modules 210 are connected in parallel to the load side (LED light source 200), and the modular LED driving unit 100 supplies power to the load as a constant current source remotely.

In the case of driving an LED light source with a constant current source, even if a part of the LED module constituting the LED light source is damaged or fails and does not operate, a predetermined constant current flows, so that the LED module that has become an open circuit due to a failure Since the current to flow is added to the normally operating LED module and flows, overcurrent may affect the lifespan of the normal LED module. If more than the rated current flows to the LED module for a long time, the LED module may be damaged.

In particular, when the modular LED driver 100 and the LED light source 200 are separated by a considerable distance, such as street lights or system lighting, it is possible to determine whether some LED modules of the LED light source 200 have become open circuits due to damage or failure. If it is to be detected on the side where the light source is located, the corresponding detection result must be transmitted to the modular LED driving unit 100 through a separate wire. In this case, problems arise in installation, operation and maintenance due to the additional wiring. In addition, it is common for the LED light source 200 to be installed in a location where it is difficult for a person to reach. If a circuit for detecting whether the LED module is open is provided where the LED light source is located, the circuit for detecting the open state is broken. In this case, it is cumbersome to repair and various complicated problems such as not being able to use the lighting equipment for a considerable period of time are derived.

Therefore, in the present invention, locating the LED module open detection circuit, which can cause relatively frequent failures in the vicinity of an LED light source that can be used for a long time once installed due to its long lifespan, creates unnecessary problems by itself, so to solve this part do.

That is, it is intended to detect whether some LED modules of the load (LED light source) have become open circuits due to failure or damage through the existing power line for supplying constant current from the modular LED driving unit 100 to the LED light source 200. In street lighting or system lighting, the modular LED driving unit 100 is installed in a position that is much easier to reach than the LED light source 200. For example, when a lighting tower is installed very high, such as in a golf course or tennis court, it is more important to have maintenance convenience and durability. When a large-scale LED module is used, it is necessary to improve durability by adapting the power supply to the mismatch caused by the deviation of the manufacturing process as well as the mismatch that occurs between the power supply and the LED module during use of the LED lighting device.

As described above, the modularized LED lighting device 10 according to an embodiment of the present invention adaptively according to the LED light source 200 to which a plurality of LED modules are connected in parallel and the state of each of the plurality of LED modules It is configured to include a modular LED driver 100 for supplying power, and the status of each of the plurality of LED modules provided in the LED light source is displayed in the modular LED driver without adding a separate wire other than a wire for supplying power. sensing and adaptively adjusting the supply of the power.

In addition, the modularized LED lighting device 10 according to an embodiment of the present invention is used as an indoor light, a street light, and a special purpose light including a ship or a factory, and the LED light source 200 composed of the plurality of LED modules is installed apart from the modular LED driver 100 and is commonly supplied with power through a single power line, and each of the plurality of LED modules included in the LED light source 200 even if no additional wiring is added in addition to the power line The modular LED driving unit 100 may detect a state for .

The present invention can improve the efficiency of LED lighting and extend its lifespan by reducing input/output loss by controlling the output current of the constant current source. In addition, in the present invention, when one LED module fails, other LED modules maintain the function of the LED lighting device that can operate normally, so that the role of lighting is not lost.

Hereinafter, a method for improving lighting efficiency by reducing input/output loss and stably operating a normal LED module to maintain the function of an overall modularized LED lighting device for a long time will be described in detail.

To this end, first, the modular LED driving unit 100 according to an embodiment of the present invention will be described in detail.

4 is a configuration diagram of a modular LED driving unit that drives in response to a state change of an LED module in a modular LED lighting device according to an embodiment of the present invention.

As shown in FIG. 4 , the modular LED driving unit 100 according to an embodiment of the present invention includes a constant voltage supply unit 110 and a modular power supply unit 120 .

Here, the constant voltage supply unit 110 receives commercial AC power and generates DC voltage for driving the LED light source through the surge protection circuit 1110, the EMI filter 112, the rectifier 113, and the switching and DC conversion unit 114. It is preferable to generate a plurality of DC voltages as a constant voltage source in order to adaptively output a constant current from the modular power supply unit 120.

That is, the EMI filter 112, the rectifier 113, and the switching and DC conversion unit 114 are similar to the conventional SMPS 112, and in the present invention, a surge protection circuit 111 is further added to protect the environment from poor lighting. It is intended to prevent the modular LED lighting device 10 from being damaged by inrush current and abnormal voltage (surge and lightning strike) that may normally occur. That is, the surge protection circuit 111 serves to protect the LED lighting device 10 from external influences.

Next, the modular power supply unit 120 includes a rectifying unit 121, a switching and DC conversion unit 122, an LED module state detection unit 123, and a driving control unit 124. That is, the modular LED driving unit 100 outputs a control signal to select a power source according to the LED module state detection unit 123 for detecting the state of each of the plurality of LED modules and the state of the plurality of LED modules detected. It is configured to include a driving control unit 124, and a switching and DC conversion unit 122 that selects and outputs the power converted to direct current according to the control signal output from the driving control unit.

The rectifying unit 121 is typically intended to obtain good power through a rectifying diode and a smoothing capacitor when there is noise such as a ripple in the voltage passing through the SMPS.

The switching and DC conversion unit 122 includes a switching circuit for selecting one of a plurality of voltage sources to output a constant current of a desired magnitude and a constant current conversion circuit for converting the selected voltage source into a desired constant current. Alternatively, it serves to select and output one of a plurality of constant current sources implemented with a plurality of constant voltage sources.

In addition, the LED module state detection unit 123 is intended to detect when any one of the LED modules of the load is opened due to failure or damage, and power compared to the current supplied to the power supply line for supplying current as a constant current source. By measuring the voltage across the line, the voltage is divided by the supply current to periodically measure the impedance of the load. The periodically measured voltage may be the same or different for each cycle depending on the state of the LED module. If the voltage is the same, it indicates that the LED module of the load is working normally. If there is a change in the measured voltage, a change in impedance for the LED module of the load is sensed according to the change. All of the LED modules of the load are operating normally and the impedance is low, and when some are open, the impedance is increased.

In the present invention, the load-side impedance change is stored in a memory and managed in a time-series manner.

The LED module state detection unit 123 reads the load-side impedance value stored in the memory and monitors any change in each cycle. As a result of this monitoring, when a change in impedance value is detected, the switching and DC conversion unit 122 is controlled to switch the voltage source to convert to constant current and output or switch the constant current source to output according to the degree of change in the corresponding impedance value. .

For example, if the equivalent circuit of two LED modules each having a load impedance value of 3 [Ω] is connected in parallel, if both LED modules are normal, the total impedance of the load will be 1.5 [Ω] and , if one of the two LED modules was damaged and opened, the total impedance of the load would be 3 [Ω].

In each case, the output voltage, that is, the voltage input to the LED light source load, will be 1.5*Is [V] if both LED modules are normal, and 3*Is [V] if one of the two LED modules is damaged and open. [V] will be

Therefore, the change in impedance can be detected by monitoring the output voltage between the previous monitoring period and the subsequent monitoring period. Accordingly, the drive controller 124 selects a predetermined constant voltage source or constant current source and provides it as an LED light source.

The switching and DC conversion unit 122, the LED module state detection unit 123, and the driving control unit 124 are major functional blocks for implementing the technical features of the present invention.

5 is a detailed block diagram of a modular power supply unit of a modular LED driving unit that drives in response to a change in state of an LED module in a modular LED lighting device according to an embodiment of the present invention.

As shown in FIG. 5 , the LED module state detection unit 123 includes a load measurement unit 123a, a memory 123b, and a load change detection unit 123c.

The load measurement unit 123a measures the voltage and current applied to the plurality of LED modules 210 according to a constant current source or constant voltage source applied to the plurality of LED modules from the output terminal of the modular LED driving unit 100, The impedance or admittance of the LED light source is calculated from the measured voltage and current, respectively, and stored in the memory 123b periodically.

Hereinafter, the load measuring unit 123a will be described in detail. First, the current value of the constant current source provided from the switching and DC conversion unit 122 to the LED light source 200 is measured and recorded. In addition, when the constant current source is supplied to the load LED light source 200, the voltage applied to the output terminal is measured. If some of the plurality of LED modules are faulty or damaged, the impedance of the load changes due to the corresponding LED module, and to detect this, the voltage value across both ends of the load is measured.

If the current value and voltage value are measured and known, the impedance can be calculated therefrom. That is, a change in impedance of the load may be sensed by applying a predetermined current to the load and measuring a voltage applied to an input terminal of the load. In the constant current source, the current maintains a constant value, and the voltage across both ends of the load will vary depending on the state of the LED module, which is the load. Monitoring voltage changes is essentially the same as monitoring impedance.

If the power supply is a constant current source, the load measuring unit 123a measures the voltage value of the output terminal, and calculates the impedance value by dividing the measured voltage value by the current value of the constant current source, or the measured voltage value. Calculating by normalizing with the current value of the constant current source, if the power source is a constant voltage source, measuring the current value flowing to the output terminal, and dividing the admittance value by the measured current value by the voltage value of the constant voltage source or calculating by normalizing the measured current value with the voltage value of the constant voltage source.

The current, voltage, and impedance measured above are stored in the memory 123b, and since the current, voltage, and impedance are stored and managed in a time-series manner, the modular LED driver 100 can always refer to them to detect the state of the LED light source. . A change in load impedance is sensed by reading the values of voltage, current, and impedance stored in the memory 123b. The load impedance (Z) can be obtained by dividing the output current value (Is) of the constant current source by the measured voltage value (V).

In addition, the load change detection unit 123c reads the current, voltage, impedance, or admittance or a combination thereof stored in the memory at a specific period and compares the current, voltage, impedance, or admittance or a combination thereof of the previous period to determine the load detect change

That is, the load measurement unit 123a measures the current value and the voltage value at a specific time, the result is stored in the memory 123b, and the load change detection unit 123c measures the load change through time-series records stored in the memory. It can track whether some of the LED modules have changed state.

The load change detecting unit 123c is configured to detect a voltage, current, impedance, or admittance stored in the memory 123b when a value of a previous cycle is greater than a value obtained by adding a specific value to a value of a next cycle, or It is detected whether it is greater than the subtraction of a specific value or less than the subtraction of the specific value.

The driving control unit 124 performs switching control of the constant current source using the result detected by the load change detection unit 123c. Through the switching control, the switching and DC conversion unit 122 may change the output current value of the constant current source by selecting a necessary constant voltage source. In addition, a corresponding constant current source among a plurality of constant current sources may be selected and output. After all, this is because the drive controller 124 is configured to output a switching signal.

Therefore, in the driving control unit 124 according to the present invention, as a result of the detection by the load change detection unit 123, the voltage value or impedance value measured in the specific period is compared to the value in the previous period. If it is greater than the sum of the specific value, the output of the constant current is selected to be output by lowering the output by one step, and if it is greater than the subtraction of the specific value, the output of the constant current is selected to be output by increasing the output by one step, and if it is smaller than the subtraction of the specific value A control signal is output to select to maintain the output of the current driving constant current.

In addition, as a result of detection by the load change detection unit 123, if the current value or admittance value measured in the specific period is smaller than the sum of the specific value compared to the value in the previous period, the output of the constant voltage is lowered by one level and outputted. If it is less than the value obtained by subtracting the specific value, the output of the constant voltage is selected to be increased by one level and outputted, and if it is greater than the value obtained by subtracting the specific value, a control signal is output to select to maintain the output of the current driving constant voltage.

Hereinafter, a method for driving a modularized LED lighting device according to an embodiment of the present invention will be described.

First, the driving method of the modularized LED lighting device includes the step of detecting the LED module status of detecting the status of a plurality of LED modules in the modular LED driver 100, and the detected LED module in the modular LED driver 100. A power supply step of adaptively supplying power to the LED light source 200 in which the plurality of LED modules are connected in parallel according to the state.

Here, the modular LED driver senses the state of the plurality of LED modules included in the LED light source without adding a separate wire other than the wire for supplying the power, and adjusts the power supply adaptively.

In addition, the driving method of the modularized LED lighting device according to an embodiment of the present invention, for the modularized LED lighting device used as an indoor light, a street light, and a special purpose light including a ship or a factory, the plurality of LED modules The configured LED light source is installed apart from the modular LED driving unit and is commonly supplied with power through a single power line, and even if no additional wiring is added in addition to the power line, for each of the plurality of LED modules included in the LED light source. It is configured to detect the status of the modular LED driving unit.

6 is a flowchart illustrating a method of driving a modular LED lighting device through an operation of a modular LED driving unit that drives in response to a change in state of an LED module in a modular LED lighting device according to an embodiment of the present invention.

As shown in Figure 6, in the driving method of the modular LED lighting device according to the present invention, in a state where the power switch is turned on (S10), once the LED driving unit 100 as a module outputs power to the LED light source (S20) It is performed while doing

That is, in the modular LED driver 100, the LED module state detection step of detecting the state of the plurality of LED modules 210 is performed (S30). Then, if the state change of the LED module is detected (S40), in the modular LED driver 100, the plurality of LED modules 210 are adaptively connected in parallel according to the detected state of the LED module (LED light source 200). ) Performs a power supply step of supplying power to (S50). If the state change is not detected, the LED module state detection step (S30) is periodically performed. This process continues until the power switch is turned off (S60).

In the LED module state detection step (S30), the voltage and current applied to the plurality of LED modules are measured according to a constant current source or constant voltage source applied to the plurality of LED modules from the output terminal of the modular LED driving unit 100, and performing a load measurement step of calculating the impedance or admittance of the LED light source 200 respectively from the measured voltage and current and periodically storing them in the memory 123b.

In addition, the LED module state detection step (S30) reads the current, voltage, impedance or admittance or a combination thereof stored in the memory in a specific period and compares it with the current, voltage, impedance or admittance or a combination thereof of the previous period and performing a load change sensing step of detecting a change in load.

In the load measuring step, when the power source is a constant current source, a voltage value of the output terminal is measured, and the impedance value is calculated by dividing the measured voltage value by a current value of the constant current source, or the measured voltage value is the same as the measured voltage value. It includes calculating by normalizing with the current value of the constant current source.

In addition, in the step of measuring the constant load, if the power source is a constant voltage source, a current value flowing to the output terminal is measured, and the admittance value is calculated by dividing the measured current value by the voltage value of the constant voltage source, or the measured current value is Calculating by normalizing with the voltage value of the constant voltage source.

In addition, the step of detecting the change in load may be performed by subtracting or subtracting a specific value from a value of a previous cycle for any one of the voltage, current, impedance, or admittance stored in the memory. It detects whether it is greater than one value or less than the value obtained by subtracting the specific value.

On the other hand, in the power supply step (S50), in the modular LED driving unit, a driving control step of outputting a control signal to select the power of the switching and DC conversion unit according to the change in the detected load, and in the modular LED driving unit, and performing switching and DC conversion steps of selecting and outputting power converted to direct current based on the control signal output from the driving control unit.

In the driving control step, as a result of the detection by the load change detection unit, if the voltage value or impedance value measured in the specific period is greater than the sum of the specific value compared to the value in the previous period, the output of the constant current is lowered by one level to output the output. Selecting and outputting a control signal to select to maintain the output of the current driving constant current if it is greater than the value obtained by subtracting the specific value, select to increase the output of the constant current by one step and output it, and if it is smaller than the value obtained by subtracting the specific value, outputting a control signal. include

In addition, in the driving control step, as a result of the detection by the load change detection unit, if the current value or admittance value measured in the specific period is smaller than the sum of the specific value compared to the value in the previous period, the output of the constant voltage is lowered by one step. If it is smaller than the value obtained by subtracting the specific value, the output of the constant voltage is selected to be output by increasing the output by one step. do what you do

Hereinafter, the operation of the modular LED driving unit that adapts to and drives the state change of the LED module in the modularized LED lighting device according to an embodiment of the present invention will be described.

7 is a flowchart illustrating a process of detecting an LED module state and switching power supply accordingly in a method for driving a modularized LED lighting device according to an embodiment of the present invention.

As shown in Figure 7, first, the power switch of the modularized LED lighting device 10 according to an embodiment of the present invention is turned on (S110), and the modular LED driver 100 outputs a rated constant current source (S120) LED module state detection and power supply switching accordingly.

Next, the modulo LED driver 100 measures the current value output from the constant current source and the voltage value at both ends of the load, stores each in a memory, and reads the voltage value stored in the memory in time series ( S130). On the other hand, in the present invention, the total number of LED modules (N) and the number (n) of LED modules normally operating in the load periodically are recorded in the memory.

If the current voltage value among the past and present voltage values at a specific point in time read in S130 is increased by more than a certain value compared to the previous voltage value (S140), the constant current Io is controlled to be lowered by one level and output (S150), and the current driving LED The number of modules is reduced by one (S160). Here, lowering the output Io of the constant current by one step corresponds to a case where one LED module of the load is out of order or an open circuit. That is, when one LED module becomes an open circuit, the total voltage value increases.

If the output voltage value does not increase more than a certain value (or a specific value) (eg 1.5 [V]) and is lower than the certain value (S170), the constant current Io is increased by one step and controlled to be output (S180), and the current The number of driving LED modules is increased by one (S190). If the output voltage value does not increase by more than a predetermined value and is not lower than a predetermined value (S170), the previous constant current output is maintained. Before the power switch is turned off (S200), these processes are continuously performed (S130 to S190). Here, a certain value (or specific value) is exemplified as 1.5 [V], but this value can be changed according to the load.

Even if the output voltage Vo is within the range of a certain voltage (Vo +/- 1.5 [V]) and the power supply is not stabilized, if the output voltage is in the range of a certain voltage, the same constant current is supplied, so the power state is immediately will stabilize In addition, if the processes ① and ③ occur repeatedly over a predetermined number of times (e.g., 5 times) in succession in a short time, the state of the constant current source and LED module is judged to be in an unstable state. In this case, it is necessary to maintain the previous constant current output as it is. . Therefore, a period of measuring the output voltage and controlling the constant current and a certain time delay may be required when outputting the constant current by lowering or increasing it by one level.

This process is configured to detect the state change of the LED module and control the switching and DC conversion unit 122 through the driving control unit 124 in the cases of ①, ②, and ③, respectively.

Hereinafter, a functional concept of a modular LED driving unit that drives by adapting to a change in state of an LED module in a modularized LED lighting device will be described.

The modular LED driving unit 100, which drives according to the state change of the LED module according to an embodiment of the present invention, first detects the state of the four LED modules, assuming that there are four LED modules in the load. .

According to the detection result of the LED module state detection unit 123, through the drive control unit 124 according to the procedure shown in FIGS. Select through and configure to supply power to the load.

A method of supplying power to the load can be supplied by a constant current source or a constant voltage source, and in one embodiment of the present invention, any one can be selected according to the user's selection.

When the modular LED driving unit 100, which drives by adapting to the state change of the LED module according to an embodiment of the present invention, supplies power to the load LED light source as a voltage source, the voltage applied to both ends of the load LED module is already known. Therefore, the state of the LED module can be known by measuring the current flowing through the load. That is, the impedance of the LED module can be calculated by measuring the applied voltage and the current flowing through the load. By monitoring the impedance of the LED module at regular time intervals, a change in the impedance of the LED module can be detected.

According to the state of the detected LED module, the power supply of the voltage source is adjusted according to the state change of the LED module so that the same current flows through each LED module when all the LED modules are operating normally. durability can be increased.

In addition, when the modular LED driving unit 100, which drives by adapting to the state change of the LED module, supplies power to the current source as the load LED light source, since the current injected into the LED module is already known, the voltage across both ends of the load is measured. By doing so, it can be known whether the state of some of the plurality of load LED modules is an open circuit or a short circuit. That is, the impedance (or admittance) of the LED module may be calculated by measuring the injected current and the resulting voltage across the load.

The voltage, current, and impedance calculated in this way are periodically checked, and the voltage, current, and impedance of the previous cycle are compared with the voltage, current, and impedance of the next cycle, and if they are higher or lower than a predetermined threshold, a plurality of LED modules are provided accordingly. Control to select and output one of the driving power supplies.

On the other hand, as a method for measuring a state change of an LED module in a modular LED lighting device according to an embodiment of the present invention, in an environment where it is difficult to measure current, voltage, and impedance while the modular LED lighting device is in operation, After turning on the switch of the modularized LED lighting device, applying a test voltage/current to the load LED module for a short period of time, measuring the feedback current or the voltage across the load, respectively, detecting a change in impedance, and then A modular LED driving unit according to an embodiment of the present invention can be designed as a method of determining the level of power to be applied.

In the present invention, the impedance value is calculated using the current value supplied to the load, the voltage value measured at both ends of the load LED module, and the current value and voltage value, or the voltage value applied to the load and the current flowing through the load terminal are measured. value, in calculating the impedance value using the voltage value and current value, assuming that the current value supplied to the load or the voltage value applied to the load is normalized, the measured voltage value or current value alone Since the state can be grasped, there is no need to calculate the impedance value.

For example, if the current or voltage supplied to the load is 1 [A] or 1 [V], the voltage or current value measured at the load becomes impedance or admittance.

As such, in the present invention, when some LED modules are damaged in the process of using an LED lighting device having a modularized light source, the modularized LED lighting device has an effect of easily performing maintenance by replacing only the damaged LED module. .

In addition, by adding a surge protection circuit, the present invention can prevent the modularized LED lighting device from being damaged by inrush current and abnormal voltage (surge and lightning strike) that can normally occur in poor lighting environments.

In addition, the present invention has the effect of preventing chain damage of the LED module by continuously supplying a constant current to the normally operating LED module by detecting the damage of the LED module and the state change for recovery (replacement) without additional wiring. .

In addition, since the present invention automatically adjusts the output of the constant current source when the failed LED module is replaced and restored, the durability of the LED lighting device can be improved by providing the output of the constant current source that is adaptively changed to the state change of the LED module. There are possible effects.

In addition, the present invention controls the output current of the constant current source to reduce the input/output loss, thereby improving the efficiency of the LED lighting and extending its lifespan.

In addition, the present invention has an effect of not losing the role of lighting by maintaining the function of the LED lighting device that can operate normally when one LED module fails.

In addition, the present invention has the effect of improving durability by adaptively adjusting the power supply to the mismatch caused by the deviation of the manufacturing process as well as the mismatch that occurs between the power supply and the LED module during use of the LED lighting device.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but this is only exemplary, and various modifications and other equivalent embodiments will be made by those skilled in the art in the field to which the technology belongs. You will understand that it is possible. Therefore, the technical protection scope of the present invention will be determined by the claims below.

10: Modular LED lighting device 100: Modular LED driving unit
200: LED light source 210: LED module
300: connector 110: constant voltage supply unit
120: modular power supply unit 121: rectification unit
122: switching and DC conversion unit 123: LED module state detection unit
124: driving control unit 123a: load measuring unit
123b: memory 123c: load change detector

Claims (14)

In the modularized LED lighting device,
An LED light source in which a plurality of LED modules are connected in parallel; and
A modular LED driver supplying power so that a constant current is supplied to the normally operating LED module by adapting to the state of damage and replacement of each of the LED modules; includes,
By detecting a change in voltage or current measured at the output terminal of the modular LED driver, the state of each of the plurality of LED modules provided in the LED light source is determined by the modular LED without adding a separate wire other than a wire for supplying power. The driving unit senses and adaptively adjusts the supply of the power,
The LED light source composed of the plurality of LED modules is a modular LED lighting device, characterized in that being supplied with power in common through a single power line while being installed spaced apart from the modular LED driving unit. delete The method of claim 1,
The modular LED driver,
LED module state detection unit for detecting the state of each of the plurality of LED modules;
a driving control unit outputting a control signal to select a power source according to the detected states of the plurality of LED modules; and
Modular LED lighting device characterized in that it further comprises; a switching and DC conversion unit for selecting and outputting the power converted to direct current according to the control signal output from the driving control unit. The method of claim 3,
The LED module state detection unit,
Measure the voltage and current applied to the plurality of LED modules according to the constant current source or constant voltage source applied to the plurality of LED modules from the output terminal of the modular LED driver and periodically store them in a memory, or measure the voltage and current from the measured voltage and current. a load measurement unit that calculates the impedance or admittance of the LED light source and periodically stores them in a memory; and
A load change detection unit that reads the current, voltage, impedance or admittance or a combination thereof stored in the memory at a specific period and compares the current, voltage, impedance or admittance or a combination thereof of the previous period to detect a change in load; A modular LED lighting device characterized in that it comprises. The method of claim 4,
The load measuring unit,
If the power source is a constant current source, the voltage value of the output terminal is measured, and the impedance value is calculated by dividing the measured voltage value by the current value of the constant current source, or the measured voltage value is normalized to the current value of the constant current source. Calculate by
If the power supply is a constant voltage source, a current value flowing to the output terminal is measured, and an admittance value is calculated by dividing the measured current value by the voltage value of the constant voltage source, or the measured current value is normalized to the voltage value of the constant voltage source. Modular LED lighting device, characterized in that it comprises calculating by. The method of claim 4,
The load change detection unit,
The value of the previous cycle for any one of the voltage, current, impedance, or admittance stored in the memory is greater than the sum of a specific value compared to the value of the next cycle, or greater than the subtraction of the specific value, or the value of the specific value stored in the memory. Modular LED lighting device, characterized in that for detecting whether it is smaller than the subtracted value. The method of claim 4,
The drive control unit,
As a result of the detection by the load change detection unit, if the voltage value or impedance value measured in the specific period is greater than the sum of the specific value compared to the value in the previous cycle, the output of the constant current is lowered by one level to be output, and the specific value If it is greater than the subtraction of , the output of the constant current is selected to be output by increasing the output by one level, and if it is smaller than the value obtained by subtracting the specific value, a control signal is output to select to maintain the output of the current driving constant current,
As a result of the detection by the load change detection unit, if the current value or admittance value measured in the specific period is smaller than the sum of a specific value compared to the value in the previous cycle, the output of the constant voltage is lowered by one level to be output. If it is smaller than the value subtracted, the output of the constant voltage is selected to be output by increasing the output by one step, and if it is greater than the value obtained by subtracting the specific value, a control signal is output to select to maintain the output of the current driving constant voltage. LED lighting equipment. In the driving method of the modularized LED lighting device,
In the modular LED driving unit, for the LED light source in which a plurality of LED modules are connected in parallel, LED module state detection step of detecting the state of damage and replacement of each of the LED modules; and
In the modular LED driver, a power supply step of supplying power so that a constant current is supplied to the LED module that operates normally in accordance with the detected state of the LED module; includes,
By detecting a change in voltage or current measured at the output terminal of the modular LED driver, the state of each of the plurality of LED modules provided in the LED light source is determined by the modular LED without adding a separate wire other than a wire for supplying power. The driving unit senses and adaptively adjusts the supply of the power,
The method of driving a modular LED lighting device, characterized in that the LED light source composed of the plurality of LED modules is commonly supplied with power through a single power line while being installed spaced apart from the modular LED driving unit. delete The method of claim 8,
The power supply step,
A driving control step of outputting a control signal to select a power supply of a switching and DC conversion unit according to the detected states of the plurality of LED modules in the modular LED driver; and
In the modular LED driving unit, a switching and DC conversion step of selecting and outputting the power converted to direct current based on the control signal output in the driving control step; driving method of a modular LED lighting device, characterized in that it further comprises. The method of claim 10,
The power supply step,
In the modular LED driving unit, the voltage and current applied to the plurality of LED modules are measured according to a constant current source or constant voltage source applied to the plurality of LED modules from the output terminal of the modular LED driving unit and periodically stored in a memory, or the measurement A load measurement step of calculating the impedance or admittance of the LED light source from one voltage and current and periodically storing them in a memory; and
In the modular LED driver, reading the current, voltage, impedance or admittance or a combination thereof stored in the memory at a specific period and comparing the current, voltage, impedance or admittance or a combination thereof in the previous period to detect a change in load Method for driving a modular LED lighting device further comprising; load change detection step. The method of claim 11,
The load measurement step,
If the power source is a constant current source, the voltage value of the output terminal is measured, and the impedance value is calculated by dividing the measured voltage value by the current value of the constant current source, or the measured voltage value is normalized to the current value of the constant current source. Calculate by
If the power supply is a constant voltage source, a current value flowing to the output terminal is measured, and an admittance value is calculated by dividing the measured current value by the voltage value of the constant voltage source, or the measured current value is normalized to the voltage value of the constant voltage source. Method of driving a modularized LED lighting device comprising calculating by. The method of claim 11,
The load change detection step,
The value of the previous cycle for any one of the voltage, current, impedance, or admittance stored in the memory is greater than the sum of a specific value compared to the value of the next cycle, or greater than the subtraction of the specific value, or the value of the specific value stored in the memory. Method for driving a modular LED lighting device, characterized in that for detecting whether it is smaller than the subtracted value. The method of claim 11,
In the driving control step,
As a result of the detection in the load change detection step, if the voltage value or impedance value measured in the specific period is greater than the sum of the specific value compared to the value in the previous cycle, the output of the constant current is lowered by one level to be output, and the specific value If it is greater than the subtraction of , the output of the constant current is selected to be output by increasing the output by one level, and if it is smaller than the value obtained by subtracting the specific value, a control signal is output to select to maintain the output of the current driving constant current,
As a result of the detection in the load change detection step, if the current value or admittance value measured in the specific period is smaller than the sum of a specific value compared to the value in the previous cycle, the output of the constant voltage is lowered by one level and outputted, and the specific If it is smaller than the value subtracted, the output of the constant voltage is selected to be output by increasing the output by one step, and if it is greater than the value obtained by subtracting the specific value, a control signal is output to select to maintain the output of the current driving constant voltage. How to drive LED lighting equipment.

Images