KR20150116945A - Led light apparatus for variable controlling illuminance and the control method thereof - Google Patents

Abstract

The present invention relates to a variable control-type illumination sensor LED lamp for setting illumination, and a control method thereof. The LED lighting device and the control method can prevent confusion of illumination detection due to the difference of illumination in each direction by controlling the brightness of an LED light to be linearly changed in response to changes in an illumination value by using information including a light amount of the LED light, a constant voltage of a power supplied to the LED light, a constant current or any combination thereof; and installing at least one illumination sensor to individually detect the light in one direction to selectively perform a dimming control on a pertinent LED light corresponding to each direction.

Description

FIELD OF THE INVENTION [0001] The present invention relates to an LED lighting apparatus and a control method thereof,

[0001] The present invention relates to an LED lighting apparatus and a control method thereof, and more particularly, to an LED lighting apparatus for controlling dimming so as to maintain a predetermined reference illuminance in accordance with an ambient illuminance, The present invention relates to a variable illuminance control type LED lighting apparatus and a control method thereof, which stabilizes the output of illumination and allows a reference illuminance to be variably set in accordance with a situation including a characteristic of a place, a change in environment, an eye fatigue or a combination thereof .

In general, LEDs are more energy efficient than conventional light sources and can be used semi-permanently, which is recognized as a next generation light source. In addition, recently, the problem of low brightness of LED has been greatly improved, so that the LED-related market using LED is spreading throughout the industry, and the LED era is foreseen.

In particular, replacing the traditional lighting in the current lighting market with LED lighting is expected to have two effects, namely, environmental friendliness and energy saving. Therefore, research and development on LED lighting technology is actively underway.

Meanwhile, the means of indoor illumination include natural light and artificial light. The natural light effect is mainly determined by the size and shape of the window, the orientation of the room, and the artificial light is determined by the type of lighting apparatus and the lighting method. do. It is necessary to use natural light and artificial light simultaneously in order to maintain sufficient indoor illumination and to obtain energy saving effect.

For the above reasons, a technology for controlling the dimming of the LED illumination so that the indoor illuminance is detected by the ambient light sensor and the indoor illuminance is kept constant based on the indoor illumination is being researched and developed, and there are also many commercially available LED illuminating devices .

The conventional LED illumination device using the light intensity sensor uses a method of sensing light from all directions when the illuminance sensor detects the illuminance of the room. However, even in the same indoor space, the brightness may be different depending on each direction (the direction of the window, the direction of the wall, and the direction of the door). Therefore, when the illuminance of the LED illumination is controlled by detecting the light of all directions as in the conventional art, there is a possibility of confusion in the detection of the indoor illumination, which can not stably maintain the brightness of the LED illumination, There is a problem that the lifetime of the illumination is shortened.

In addition, since the conventional LED illuminating device using the illuminance sensor performs illuminance control based on the external illuminance value input to the illuminance sensor within a range fixedly set on the circuit, there is no way for the user to adjust the illuminance according to each situation As a result, there is a problem that excessive or insufficient light, particularly light pollution due to unnecessary light, occurs.

In addition, the conventional LED lighting apparatus controls the dimming of the LED lighting through PWM (Power Width Modulation) control. The PWM control is a function of controlling the lighting and lighting ratio of the LED element at a high speed, However, it may cause a trembling phenomenon of light detected when shooting with a high-speed camera. Such a light trembling phenomenon is not felt for a short time, but there are problems that cause various problems including an increase in eye fatigue when exposed for a long period of time.

According to the present invention, according to the present invention, the reference illuminance of the LED illumination (the brightness that is constantly maintained by the external light and the LED illumination device, ), And can stably control the dimming of the LED illumination by stably detecting the external illuminance without interference of the illumination detection and present a new LED illumination device capable of eliminating the light shaking phenomenon I want to.

Hereinafter, the prior art in the technical field of the present invention will be briefly described, and then, technical matters to be differentiated from the prior art will be described.

First, Korean Unexamined Patent Publication No. 2012-0069031 (June 28, 2012) relates to a high resolution dimming method and apparatus for LED lighting in which illuminance and optical sensor are interlocked, and more particularly, A controller for controlling an output flux of the plurality of LED lights; An optical sensor installed on the ceiling; And a control unit receiving the measured data from the optical sensor as input and compensating the data based on the reference illuminance setting and transmitting the compensated data to the input signal of the controller. In which the output luminous flux of the LED illumination is controlled by the control unit.

Korean Patent Laid-Open Publication No. 2011-0076400 (Jul. 23, 2011), a human body detection sensor and an illuminance sensor are disposed on at least one side of a base to precisely set lighting holding time and control brightness to reduce power consumption The present invention relates to a LED lighting apparatus, and more particularly, to a LED lighting apparatus that includes a hemispherical heat sink having a plurality of heat sinks on its surface, a tube made of a hemispherical transparent material covering the heat sink, A base formed with a PCB substrate on which a plurality of LEDs are arranged, a base including both ends of the tube including the heat sink and connected to the socket, and a base formed on one side of the base, An illuminance sensor formed on the other side of the base for sensing the illuminance of the surroundings, And a converter for supplying power to the LEDs and receiving information from the human body sensor and the illuminance sensor and controlling the color temperature or brightness of the LEDs.

In addition, Korean Patent No. 0850448 (Jul. 30, 2008) is related to an LED landscape lighting device in which automatic flicker and brightness are automatically controlled according to the surrounding brightness. More specifically, The brightness of the LED is controlled by comparing the set reference illuminance value, obtaining the difference value between the ambient illuminance value and the reference illuminance value, and outputting the power control signal and the pulse width signal based on the difference, LED landscape lighting technology.

Korean Patent Registration No. 0820355 (Apr. 01, 2008) discloses an LED driving apparatus and an LED control method for the LED driving apparatus, taking into account the external illuminance. In the display apparatus such as an LCD, Which can output lights or colors of appropriate brightness according to the brightness of the LEDs, and can ensure visibility through color contrast.

Although the prior art documents are similar to the present invention in that they are technologies for controlling dimming of LED lights using an illuminance sensor, the illuminance sensor is designed to sense light in a single direction as in the present invention, For reducing the crosstalk and using a local area communication (NFC) method including IR, RFID or a combination thereof, the reference illuminance set in the LED illuminating device can be variably set according to the characteristics of the place and the environment It is different from the present invention in that it is not presented. Also, in the prior art document, the LED light source output according to the illuminance input from the illuminance sensor is prevented from being discontinuously output, and the LED output light amount or the LED driving power is linearly changed The difference is that it does not suggest any technology to prevent irregular changes such as blinking or sudden lightening of the LED illumination brightness.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide an LED lighting device capable of improving the brightness of the LED illumination by changing the brightness of the LED illumination using a light amount of LED illumination, a constant voltage, And a control method of the LED lighting device that can stabilize the output of the LED lighting to prevent flickering of the lighting.

Further, according to the present invention, it is possible to variably set the reference illuminance of the LED illumination according to the circumstances including the characteristics of the place where the LED illumination is installed, the environment change, the eye fatigue, or a combination thereof, And the effect of energy saving can be obtained.

It is another object of the present invention to variably control reference illuminance setting of an LED illumination through a remote controller (hereinafter referred to as a remote controller) by using a short distance communication method including IR, RFID, or a combination thereof.

Further, according to the present invention, the at least one illuminance sensor is provided to sense light in a single direction, and the dimming control of the corresponding LED illumination is selectively performed in each direction, thereby causing confusion in illuminance detection due to illuminance difference in each direction The purpose of the

According to an embodiment of the present invention, there is provided an illuminance setting variable type LED lighting apparatus comprising: an LED illumination device or an illuminance sensor installed at an arbitrary position in an illumination space to detect illuminance; A dimming control unit for controlling power ON, power OFF, dimming, or a combination thereof for the light source unit of the LED lighting apparatus; And a main controller for calculating the brightness of the LED illumination capable of maintaining a predetermined reference illuminance by receiving the illuminance value sensed by the illuminance sensor and transmitting the brightness of the LED illumination to the dimming control unit as a dimming control signal, The predetermined reference illuminance can be variably set, and the brightness of the LED illumination is controlled so as to change linearly with the change of the illuminance value.

According to another aspect of the present invention, there is provided an illuminance setting variable type LED lighting apparatus including a light amount sensor for sensing an amount of light output from an LED light source and transmitting the detection result to a main controller; An output sensing unit for sensing a constant voltage or a constant current state of a power supply output from the power supply unit or the dimming control unit and transmitting the sensing result to the main control unit; Or a combination thereof, wherein the main controller uses the information including the light amount of the LED illumination, the constant voltage of the power source supplied to the LED illumination, the constant current, or a combination thereof to change the brightness of the LED illumination to a linear So as to be controlled to be changed.

Further, the illuminance setting variable LED lighting apparatus according to an embodiment of the present invention may further include a remote controller interface unit for variably setting the predetermined reference illuminance through a remote controller. In addition, And the remote control interface unit and the main controller are supplied with power from the power supply unit so as to receive a control command from the remote controller.

In addition, in the illuminance setting variable LED lighting apparatus according to an embodiment of the present invention, the remote control interface unit includes a local area communication (NFC) method including IR, RFID, or a combination thereof.

Further, in the illuminance setting variable type LED lighting apparatus according to an embodiment of the present invention, the illuminance sensor may be provided so that at least one of the illuminance sensors detects light in a single direction, Thereby preventing confusion of the illumination detection due to the illuminance difference in each direction.

According to another aspect of the present invention, there is provided a method of controlling variable illumination of an LED lighting device, including: sensing illumination at an arbitrary position in an LED illumination device or an illumination space through at least one illumination sensor; Performing power ON, power OFF, dimming, or a combination of these on the light source unit of the LED lighting apparatus through the dimming control unit; And a main control step of calculating a brightness of the LED illumination capable of maintaining a predetermined reference illuminance by receiving the sensed illumination value and providing a dimming control signal to perform dimming control using the brightness of the LED illumination, The predetermined reference illuminance can be variably set, and the brightness of the LED illumination is controlled so as to change linearly with the change of the illuminance value.

According to another aspect of the present invention, there is provided a method for controlling variable illumination of an LED lighting apparatus, the method comprising the steps of sensing light amount output from an LED illumination through a light amount sensor, A light amount detecting step An output sensing step of sensing a constant voltage or a constant current state of a power supply output from the power supply device or the dimming control unit through the output sensing unit and providing the sensing result for use in the main control step; Or a combination thereof, wherein the main controller uses the information including the light amount of the LED light, the constant voltage of the power source supplied to the LED light, the constant current, or a combination thereof to adjust the brightness of the LED light The control is performed so as to change linearly.

According to another aspect of the present invention, there is provided a method of controlling variable illumination of an LED lighting apparatus, the method comprising: providing a remote control interface for variably setting the predetermined reference illuminance through a remote controller; And the power supply is continuously supplied from the power supply unit so that a control command can be received from the remote controller, so that the remote controller interface is operated.

According to another aspect of the present invention, there is provided a variable illumination control method for an LED lighting apparatus, wherein the remote control interface includes an NFC method including IR, RFID, or a combination thereof .

Further, in the illuminance setting variable control method of an LED lighting apparatus according to another embodiment of the present invention, at least one of the illuminance sensors is installed to sense light in a single direction, By selectively performing the dimming control, it is possible to prevent confusion of the illumination detection due to the illuminance difference in each direction.

[0001] The present invention relates to an illuminance setting variable illuminance sensor LED and the like and a control method thereof, and more particularly, to an illuminance sensor LED and the like of the illuminance setting variable illuminance control type illuminance sensor LED and the like using information including a light amount of LED light, a constant voltage, It is possible to stabilize the output of the LED illumination to prevent the flicker of the illumination and to prevent the flickering of the LED by controlling the LED illumination using the short distance communication method including IR, So that the energy can be effectively saved and the user-customized roughness setting can be performed. In addition, at least one illuminance sensor is provided to sense light in a single direction, respectively, and dimming control of the corresponding LED illumination is selectively performed in each direction, thereby preventing confusion in illuminance detection due to illuminance difference in each direction , It is possible to control the light intensity in a stable manner, thereby extending the service life of the LED lighting apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exemplary view for explaining a configuration of an LED lighting apparatus using a light intensity sensor according to the related art; FIG.
BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to an LED lighting apparatus,
3 is an exemplary view for explaining an illuminance sensor installation structure of a conventional LED lighting apparatus.
FIG. 4 is an exemplary view for explaining an illuminance sensor installation structure of an illuminance setting variable type LED lighting apparatus according to an embodiment of the present invention; FIG.
5 is a conceptual diagram for comparing conventional discrete control and linear control of the present invention in an illuminance setting variable control according to an embodiment of the present invention.
6 is a flowchart for explaining a variable illumination control method according to an embodiment of the present invention.
7 is a flowchart for explaining a linear control method according to an embodiment of the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of an illuminance setting variable type LED lighting apparatus and a control method thereof according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a view for explaining a configuration of an LED lighting apparatus using a light intensity sensor according to the related art.

As shown in FIG. 1, an LED illumination device using a conventional conventional illumination sensor converts an AC voltage supplied from the outside into a DC voltage according to the conditions of the LED light source part, A dimming control unit for controlling the brightness of the LED illumination, an illuminance sensor installed in the space provided with the LED illumination for sensing the illuminance of the surroundings, the illuminance sensor And a driver for causing the dimming control unit to perform dimming control according to the ambient illuminance data measured by the dimming control unit.

The illuminating switch using the illuminance sensor according to the related art measures the ambient illuminance of the illuminating space in the illuminance sensor and adjusts the brightness of the LED illuminating based on the set reference illuminance. That is, the driver outputs a PWM signal (pulse width modulation signal) based on the difference between the ambient illuminance value and the reference illuminance value to control the dimming of the LED light source section, so that the illuminance of the illumination space, The reference illuminance is maintained.

However, in the lighting switch according to the related art, since the reference illumination value of the illumination space maintained by the LED illumination and the external light is fixedly set to the lighting switch, the corresponding lighting switch only performs dimming control according to the same reference illumination at any place I had to do it. However, the brightness of the required LED lighting may vary depending on the characteristics of the place (use of the place, location, etc.). Further, even in the case of the LED lighting installed in the same place, a different reference illuminance may be required depending on the change of the environment, and the reference illuminance may vary depending on the degree of fatigue or taste of the user's eyes. Although it is necessary to be variable depending on the situation, it has not been possible to satisfy such a situation with a conventional lighting switch having a fixed reference luminance value. In addition, even if the reference illuminance values are fixedly set to two or more, it is difficult to cope with all of the above situations (characteristics of a place, change of environment, user selection, etc.).

In addition, since the lighting switch according to the related art uses linear control to control the dimming, there is a problem that the LED lighting is crooked or the lighting flickers. More specifically, the linear control refers to controlling the target brightness of the LED illumination output according to the external illuminance at a time without intermediate processing in controlling the LED illumination. For example, when the external illuminance changes sharply and the dimming control should be performed from 50% brightness to 100% brightness of the LED illumination, the LED lighting is controlled to be 100% brightness immediately after detecting the change of the external illumination . Likewise, if dimming control is to be performed from 100% brightness to 50% brightness, dimming is controlled at 50% brightness without going through intermediate brightness.

However, the dimming control method using the linear control as described above has a problem that the brightness of the LED illumination is adjusted within a short period of time, so that the user feels loud or flickering of the illumination. More specifically, even if the system maintains the reference illuminance using the illuminance sensor, the brightness of the LED illuminant is adjusted in accordance with the external illuminance. Therefore, there is a moment when the brightness of the illumination space is different from the reference illumination until the illuminance sensor senses the change of illuminance and controls the dimming after changing the illuminance of the outside. At this time, if the dimming method using the linear control as described above is used, the brightness of the LED illumination changes for a moment, so that the human's eyes can not instantly adapt to it and can be perceived as flickering or flickering of the illumination.

Accordingly, the present invention can variably set the reference illuminance of the LED illumination according to the conditions including the fatigue of the user's eyes, the characteristics of the place, the environment, or a combination of them, and can eliminate the light shaking phenomenon by the linear dimming control LED lighting devices that can be used in the future.

FIG. 2 is an exemplary view for explaining a configuration of a variable illumination type LED lighting apparatus according to an embodiment of the present invention. FIG.

As shown in FIG. 2, the illuminance setting variable-control LED lighting apparatus of the present invention is improved in electrical circuit design and in combination with a microprocessor (MCU), so that the LED illumination apparatus of the prior art shown in FIG. A lighting controller 110, a signal receiver 120, a main controller (MCU) 130, a driver 140, a dimming controller 150, A light amount detection sensor 160 and an output sensor 170. [

First, the LED illuminating device of the present invention is configured to allow the user to set a reference illuminance according to a situation through a remote controller by moving away from a fixed reference illuminance system of the related art.

The signal receiving unit includes a remote control interface. The signal receiving method of the remote control interface includes a short distance communication (NFC) method including IR, RFID, or a combination thereof. When the user inputs a new reference illuminance value Lt; / RTI > In this case, the means for inputting the new reference illuminance value is not limited to the remote controller but may be provided with a reference illuminance input means in the switch portion of the LED illuminating device or a separate display device to check the currently set reference illuminance value Or it may be possible to easily set the reference illuminance value by using the touch screen panel. Furthermore, the remote control interface may be constructed as a Ubiquitous lighting control system supporting a communication interface capable of interaction between at least one LED lighting device and a portable smart terminal through a WiFi.

As described above, the reference illuminance value input through the signal receiving unit (remote controller interface) 120 is input to the main control unit 130 and is set as a new reference illuminance value. That is, the LED lighting apparatus of the present invention can apply the same product to various places and environments, and it is possible to maintain the illuminance of the corresponding lighting space with various brightness depending on the taste and the will of the user in the same place and environment Do.

Meanwhile, the main controller 130 performs dimming control of the LED lighting device of the present invention, and includes a microcontroller unit (MCU). An analog-to-digital converter and an illumination control related interface for converting a digital signal inputted from the illuminance sensor 110, the signal receiving unit 120, the light amount sensor 160, or the output sensing unit 170 . The main control unit 130 includes the functions of the constituent elements and may have a separate configuration or may be implemented as a single chip.

The main control unit 130 receives the illuminance (ambient illuminance) value of the illuminated space from the illuminance sensor 110 and compares it with a predetermined reference illuminance value. According to the comparison result, the brightness value of the LED illumination capable of maintaining the reference illuminance is calculated and a dimming control signal is generated according to the brightness value. In response to the dimming control signal, the driver 140 controls the dimming controller 150 so that the brightness of the LED illumination becomes the calculated brightness through the PWM control. In addition, the main control unit 130 may turn off the power supply unit 100 according to an input external illuminance value, thereby saving unnecessary energy waste.

For example, when the main illuminator 130 detects that the ambient illumination value detected by the illuminance sensor 110 is lower than a predetermined reference illuminance when the power supply 100 is off and the LED illumination is off, The controller 100 turns on the power supply 100 to supply power to the LED light source unit, and then controls the dimming of the LED light through the dimming control signal. Then, when the ambient illuminance value is equal to or higher than a predetermined reference illuminance, the power supply apparatus 100 is turned off to prevent electricity from being wasted in the LED light source unit 100, the power supply apparatus 100, and the dimming controller 150 .

The OFF state of the power supply device 100 controlled by the main controller 130 is a state in which a part related to power supply to the dimming controller 150 and the LED light source is off, The main controller 130, the illuminance sensor 110, and the signal receiver 120 should be normally supplied with power even when the main body 100 is turned off. This is because even if the power source apparatus 100 is turned off, the power source apparatus 100 can be turned on again by the remote control signal or the external illuminance to perform dimming of the LED lighting apparatus.

Alternatively, the main controller 130, the ambient light sensor 110, and the signal receiver receive power from the power supply 100 when the power supply 100 is turned on, and the power supply 100 when the power supply 100 is off The power supply 100 may be configured to receive power from the charged battery when the power supply 100 is turned on.

Meanwhile, the LED lighting apparatus of the present invention can perform stable illumination control by detecting the output light amount of the LED light source unit, the constant voltage or the constant current state of the LED light source unit, and performing feedback.

The light amount sensing sensor 160 senses an output light amount of the LED light source unit, and the output sensing unit 170 senses a constant voltage or a constant current state of the LED light source unit. The result detected by the light amount sensor 160 and the output sensing unit 170 is converted from an analog signal to a digital signal and transmitted to the main control unit 130 , The main control unit 130 controls the brightness of the LED illumination to change linearly when the variation width of the light amount is equal to or greater than the reference value or the constant voltage or the constant current state is not stable and the output of the LED light source unit is unstable, Can be stabilized.

Here, the sensing of the constant voltage and the constant current may be sensed during the feedback control of the power supply unit SMPS or may be detected by the dimming control unit. However, for more stable dimming control for the LED light source, It is possible to use a structure that feeds back a signal

In the present invention, it is desired to control with the software program in the main control unit in consideration of the problem of the summer and the parts deterioration of the illuminance control through the sensor signal. In other words, it uses a fast processor to perform sensing and control in real time.

Further, the LED lighting apparatus of the present invention can control the LED output light amount or the LED driving power so as to change linearly according to the variation of the illuminance, thereby preventing irregular change in the brightness of the LED illumination, such as a sudden lightening or darkening have. A detailed description thereof will be described with reference to FIG.

For reference, the structure of the power supply apparatus 100 and the dimming controller 150 and the general constituent means necessary for the LED lighting apparatus other than the above-described constitution are not essential parts for explaining the gist of the present invention, It will be omitted.

3 is an exemplary view for explaining an illuminance sensor installation structure of a conventional LED lighting apparatus.

As shown in FIG. 3, in the LED lighting apparatus that performs dimming using the illuminance sensor according to the related art, when the illuminance according to each direction is changed, it has been difficult to detect the external illuminance. More specifically, the illuminance sensor of a conventional LED illuminating apparatus is generally installed on a front surface or a side surface of an LED illuminator, and detects external illuminance by sensing light in all directions at a location where the illuminance sensor is exposed.

This is because when a light of a passing vehicle instantly passes through a window and is detected by the illuminance sensor, light coming from the outside or light of another illumination is detected when a door or the like of the space is temporarily opened, An external illuminance value different from the space is input to the main control unit 130, thereby dimming the LED illumination with unfavorable brightness.

As described above, the light interfering with the illumination space temporarily, regardless of the illuminance of the illumination space, is referred to as noise light. Since the cause and the type of the noise light are different according to the living environment, it is practically impossible to control the noise light itself so as not to interfere with the illumination space. Therefore, even if the noise light interferes with the illumination space, I needed a way to detect it.

In order to solve such a problem, the LED illumination device of the present invention is constructed and installed so that only the light in a specific direction is detected by the illuminance sensor, thereby preventing the light output of the LED illumination from becoming unstable due to the noise light.

FIG. 4 is an exemplary view for explaining an illuminance sensor installation structure of an illuminance setting variable type LED lighting apparatus according to an embodiment of the present invention.

As shown in FIG. 4, the illuminance sensor of the LED lighting apparatus of the present invention is a single direction illuminance sensor which can detect only light in a specific direction unlike the illuminance sensor of the conventional LED lighting apparatus, The light input from the light source is blocked.

As described above, the illuminance sensor according to the present invention determines the direction in which the substantial illuminance of the illumination space is maintained, that is, the direction that receives the least influence by the noise light, as the ambient illumination sensing direction, Can be detected.

Although the illuminance sensor is attached to the LED illuminating device in the above figure, it can be installed at any position other than the LED illuminating device. In other words, the direction in which the illuminance should be detected varies depending on various external factors including the characteristics of the place and the environment, so that the position of the illuminance sensor should be variable.

In addition, at least one illuminance sensor that detects light in a single direction may be installed in the corresponding illumination space so that the direction in which the ambient illuminance is sensed can be selected according to the situation. Thus, it is possible to remotely select the direction for detecting the coarse adjustment by setting the reference temperature such as the remote controller.

As described above, the present invention can prevent the disturbance of illuminance detection due to the difference in illuminance in each direction, and it is possible to stably control the illuminance, thereby extending the service life of the LED illuminating device.

FIG. 5 is a conceptual diagram for comparing a conventional discontinuous control and a linear control according to an embodiment of the present invention in an illuminance setting variable control according to an embodiment of the present invention.

As shown in FIG. 5, the linear control, which is a dimming control method in the LED lighting apparatus of the present invention, is such that each dimming step has linearity by subdividing the dimming step as compared with the prior art dimming control method. As each dimming stage has linearity, the brightness of the LED illumination can be smoothly changed to the target brightness regardless of how the external illuminance changes.

More specifically, the dimming control according to the conventional technique is a discontinuous control. For example, as shown in FIG. 5A, in the case of three-step dimming control, the output of the current LED illumination is set to a voltage of 3.4V Dimming has progressed through one step in the conventional dimming control method if the illuminance of the illumination space is reduced and the brightness of the LED illumination is dimmed to the brightness driven by the voltage of 3.7V under the driving brightness. That is, the driving power supplied from LED lighting is directly converted from 3.4V to 3.7V.

On the other hand, unless the dimming is controlled in advance by predicting the illumination variation of the illumination space, the time difference due to dimming of the LED illumination for maintaining the illuminance variation of the illumination space and thus the reference illumination is inevitable. The illuminance of the illumination space temporarily deviates from the reference illuminance according to the time difference. At this time, if the brightness of the LED illumination is changed in accordance with the reference illuminance at the same time as the conventional dimming control method, the user can not but be aware of the change of illuminance strongly, which can be an element that hinders the activity in the illumination space.

Thus, in the present invention, in the situation where the output of the current LED illumination is the brightness driven by the voltage of 3.4V, the brightness of the illumination space is lowered and the brightness of the LED illumination is dimmed to the brightness driven by the voltage of 3.7V , The driving voltage is gradually increased over at least one step from 3.4 V to 3.7 V so that the brightness of the LED illumination reaches the target brightness which gradually maintains the reference illuminance. That is, referring to FIG. 5 (b), if the dimming voltage is finely controlled in accordance with the change in illuminance, dimming control can be performed almost linearly.

Referring to FIGS. 5 (c) and 5 (d), conventional dimming control according to PWM operates the current supply on / off in a time-controlled (PWM) manner in order to control the amount of current supplied to the LED light source . As a result, when the high-speed camera is used for PWM control, a slight trembling phenomenon appears. On the other hand, as shown in FIG. 5 (d), in the present invention, the linear control is intended to operate by continuously controlling the voltage continuously to control the amount of current supplied to the LED light source. This is a linear control over the voltage rise when dimming using a FET.

That is, the dimming control method of the LED lighting apparatus of the present invention is a control method that minimizes visual unnaturalness by making the output variation of the LED illumination continuous by classifying the conventional dimming control step.

6 is a flowchart for explaining a variable illumination control method according to an embodiment of the present invention.

As shown in FIG. 6, the illuminance setting variable control method of the present invention firstly receives a reference illuminance value through a short distance communication (NFC) method including IR, RFID, or a combination thereof, Value to a new reference illuminance (S101). The illuminance is sensed at any position in the LED illuminating device or the illumination space through at least one illuminance sensor (S102). The illuminance sensor transmits the sensed illuminance value to the main controller (S103). The main control unit calculates the brightness of the LED illumination capable of maintaining a predetermined reference illumination based on the input illumination value (S104). The main control unit generates a switch on-off signal and a dimming control signal to perform dimming control according to the calculated brightness of the LED illumination (S105). The generated switch on-off signal is transmitted to the power supply unit, and the dimming control signal is transmitted to the driver 140 to perform linear dimming control (S106).

7 is a flowchart illustrating a linear control method according to an embodiment of the present invention.

As shown in FIG. 7, the variable illumination control method of the present invention firstly detects illuminance at an arbitrary position in an LED illumination device or an illumination space through at least one illumination sensor (S201). The light amount of the LED light, the constant voltage of the power supplied to the LED light, the constant current, or a combination thereof (S202). The brightness of the LED illumination is controlled to be linearly changed with respect to the variation of the illuminance value using the information including the combination of the input information (S203).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

10: LED lighting device (conventional) 11: illuminance sensor (conventional)
20: Variable control LED lighting device with illumination setting
21: Single direction illuminance sensor 22:
50: remote controller 100: power supply unit
110: illuminance sensor 120: main control unit 130,
130: main control unit 140: driver
150: dimming controller 160: light intensity sensor
170: Output detection unit 170:

Claims (10)

An illuminance sensor installed at an arbitrary position in the LED illuminating device or the illumination space to detect illuminance;
A dimming control unit for controlling power ON, power OFF, dimming, or a combination thereof for the light source unit of the LED lighting apparatus; And
And a main controller for calculating the brightness of the LED illumination capable of maintaining a predetermined reference illuminance based on the illuminance value detected by the illuminance sensor and transmitting the brightness of the LED illumination to the dimming control unit as a dimming control signal,
Wherein the controller is configured to variably set a predetermined reference illuminance and controls the brightness of the LED illuminant to be linearly changed with respect to a variation of the illuminance value. The method according to claim 1,
A light amount sensor for detecting the amount of light output from the LED lighting and transmitting the detection result to the main controller;
An output sensing unit for sensing a constant voltage or a constant current state of a power supply output from the power supply unit or the dimming control unit and transmitting the sensing result to the main control unit; Or a combination thereof,
The main control unit controls the brightness of the LED lighting to be linearly changed with respect to the variation of the illuminance value by using information including the light amount of the LED illumination, the constant voltage of the power source supplied to the LED illumination, the constant current, Variable controlled LED lighting device with illuminance setting. The method according to claim 1,
And a remote controller interface unit for variably setting the predetermined reference illuminance through a remote controller,
Wherein the remote controller interface unit and the main controller are supplied with power from the power supply unit so that the control command can be received from the remote controller even when the LED illumination is not turned on. The method of claim 3,
Wherein the remote control interface unit includes a short range communication (NFC) method including IR, RFID, or a combination thereof. The method according to claim 1,
The illuminance sensor comprises:
Wherein at least one of the at least one LEDs is arranged to sense light in a single direction so as to selectively control the dimming of the corresponding LED illumination in each direction so as to prevent disturbance of illumination detection due to difference in illumination in each direction Variable controlled LED lighting device. Sensing illumination at any location in the LED illumination device or illumination space through at least one illumination sensor;
Performing power ON, power OFF, dimming, or a combination of these on the light source unit of the LED lighting apparatus through the dimming control unit; And
Calculating a brightness of the LED illumination capable of maintaining a predetermined reference illuminance based on the sensed illumination value, and providing a dimming control signal to perform dimming control using the brightness of the LED illumination,
Wherein the main controller is configured to variably set a predetermined reference illuminance and controls the brightness of the LED illumination to be linearly changed with respect to a variation of illuminance value. The method of claim 6,
A light amount sensing step of sensing the amount of light output from the LED light through the light amount sensing sensor and providing the sensing result so as to be controlled in the main language stage;
An output sensing step of sensing a constant voltage or a constant current state of a power supply output from the power supply device or the dimming control unit through the output sensing unit and providing the sensing result for use in the main control step; Or a combination thereof,
The main control step controls the brightness of the LED lighting to be linearly changed with respect to the variation of the illuminance value by using the information including the light amount of the LED illumination, the constant voltage of the power source supplied to the LED illumination, the constant current, Of the illuminance of the LED illumination device. The method of claim 6,
A remote controller interface is provided so that the predetermined reference illuminance can be variably set through a remote controller, and power is continuously supplied from a power supply device so that a control command can be received from the remote controller even when the LED illumination is not turned on, The LED illuminating device according to claim 1, The method of claim 8,
Wherein the remote control interface includes a short range communication (NFC) method including IR, RFID or a combination thereof. The method of claim 6,
The illuminance sensor comprises:
Wherein at least one of the at least one LEDs is arranged to sense light in a single direction to selectively perform dimming control of the corresponding LED illumination in each direction to prevent confusion of illumination detection due to illumination variations in each direction Variable control method of illuminance setting of a device.

Images