KR101278947B1 - Led lighting unit - Google Patents

Abstract

PURPOSE: An LED lightening device and a method which enable dimming control is provided to increase a power-saving effect by revising brightness of lightening based on the intensity of illumination around shadow. CONSTITUTION: A timer setting section for standard illumination intensity setting calculates average illumination intensity value. A vertical wall shadow decoding section (60) reads out the shadow of vertical wall. A micro computer (70) controls the dimming of an illumination intensity data. A communication module (80) is electrically connected to the micro computer.

Description

LED lighting device and method capable of dimming control {LED Lighting Unit}

The present invention relates to an LED lighting apparatus and method capable of dimming control, and in particular, to extract the shadow region generated from the vertical wall when controlling the window lighting apparatus of a school or office to apply the illuminance value of the region outside the shadow to apply glare The present invention relates to an LED lighting device and a method capable of dimming control, wherein the dimming control is maximized while maximizing the power saving effect.

Recently, in addition to conventional incandescent or fluorescent lamps for indoor lighting in a house or building, lighting LED modules are often used.In comparison with conventional incandescent or fluorescent lamps, LEDs have advantages such as high brightness, low power consumption, small size, light weight, and long life. As a result, efforts and development to use LED as a lighting device have been increasing recently, and the demand for this is increasing. In addition, as in the case of incandescent lamps or fluorescent lamps, LED lighting devices that can not only turn on / off the LED lights but also adjust the dimming (dimming) are widely used.

On the other hand, at this time, the conventional lighting device for turning on the above-mentioned lighting lamp to turn on the lighting lamp by supplying a constant AC voltage at all times regardless of a specific place and environment in supplying electrical energy to the lighting lamp. However, according to the conventional method of supplying electric energy of a lighting lamp, unnecessary waste power is generated in a specific environment that does not require a constant power, and as a result, the lifespan of the lighting lamp is shortened, resulting in huge economic losses at the consumer or national level. There was a problem.

In addition, it is classified as the need to control the fluorescent lamps on the side of the window because it is always on because there is no inconvenience in living because the weather is good on the side of the window in the home, office or factory office.

Therefore, for this purpose, a device for automatically turning off a fluorescent lamp when a certain illuminance or more has been developed, but when a predetermined reference point is crossed, there is a problem in that the lighting is frequently repeated. In other words, it is inconvenient to set the control point separately according to the use environment because it is required to specify the off time point, and if the intensity of illumination is severely changed based on the reference point, the continuous flashing state is made and the user felt very inconvenient.

In addition, the method of measuring the illuminance also includes a lot of error factors for sensing the illuminance, such as the light input from the fluorescent lamp, it appears that there are many problems to be solved until the actual use of the lamp power saving device.

Meanwhile, in order to solve the problem, the applicant has proposed an automatic power saving device and a method (registered patent No. 10-0660615) using optical sensing, and briefly summarizes the technology, a power supply unit for supplying power; A light detecting unit for changing an internal resistance corresponding to the irradiation light energy as sensing ambient irradiation light; An optical sensing time setting unit for determining an input time of light input by the optical sensing unit; An average illuminance calculating unit for determining and notifying an off point of the lamp by averaging illuminance input for a time specified by the light sensing time setting unit; A delay illuminance calculator which continuously delays a predetermined time of the light sensing time setting unit to erase initial data and averages illuminance data while inputting later data; An output range setting unit for setting a gap for setting a gap for turning on / off the lamp and dividing it by a plus or minus as a reference point to set a predetermined gap; A lighting illuminance manual input unit for designating a light quantity value at which the lamp should be unconditionally lit; It is connected to the light sensing unit, the light sensing time setting unit, the average illuminance calculating unit, the delay illuminance calculating unit, the lighting illuminance manual input unit and the output range setting unit, and processes the data input from the light sensing unit. It secures the average data for the specified time and decides the lights out time, and sets the data output by the average illuminance calculator as the standard illuminance to determine whether the data of the delay illuminance calculator is within the setting range of the output range setting unit. It is characterized by including the microcomputer that outputs the lamp flashing light signal after comparing with the illuminance data of .It is automatically set as the standard illuminance value and operates without setting the standard illuminance value. If the illuminance value to be set is specified, if the current illuminance falls below the illuminance value, And it will have the advantage of providing more convenient use of the illumination device.

However, as a result of the experiment, when the lights are turned off or turned on at least two fluorescent lamps installed in one lighting set at a time, it was found that the light and dark of the light is instantaneously recognized.

In other words, a lighting set commonly used in a school usually has two fluorescent lights inserted into one lighting set, and thus, when the lighting is controlled to exceed or be less than the standard illuminance, the two fluorescent lights are controlled at once and the brightness of the light is instantaneously. And darkness are perceived by the user.

In order to solve this problem, Patent No. 10-0927745 to which the applicant is registered has a power supply unit 10 for supplying power to a lamp and an electric control element; A light detecting unit 20 in which an internal resistance is changed in response to the irradiation light energy as the surrounding irradiation light is detected; An optical sensing time setting unit 30 for determining an input time (1 second to 2 seconds) of light input by the optical sensing unit; To specify the input time of the amount of light input through the light sensing unit for the time set by the light sensing time setting unit, and to automatically set the reference illuminance by averaging the input light quantity value for a specified time (60 minutes to 90 minutes). A standard illuminance setting timer setting unit 40; To specify the input time of the amount of light input through the light sensing unit for the time set by the light sensing time setting unit, and to automatically set the average illuminance by averaging the input light amount for a specified time (5 to 10 minutes). An average illuminance setting timer setting unit 50; A reference illuminance timer setting unit 60 for presetting a time excluded when the lamp is turned on again after a predetermined time after the lamp is turned off; Input the standard illuminance value calculated by averaging the light quantity value for the time designated by the reference illuminance setting timer setting unit 40 and at the same time, the amount of light when the first illuminator or the second illuminator is turned on, or the first illuminator or the second illuminator A light amount storage memory 71 for storing a light amount when the illumination lamp is turned off; The light detecting unit 20, the light sensing time setting unit 30, the timer setting unit 40 for setting the standard illuminance, the timer setting unit 50 for setting the average illuminance, and the timer setting unit for removing the standard illuminance 60 and a microcomputer 70 electrically connected to the light amount memory 71; The microcomputer 70 receives light quantity data at a time interval set by the light sensing time setting unit 30, and then averages the amount of light measured by the time set by the timer setting unit 40 for setting the reference illuminance. The amount of light is calculated and stored in the memory for storing the amount of light, and when the power is turned off, the timer setting unit 60 determines whether the reference illuminance exclusion timer is within the specified time. The reference illuminance value is continuously used, and when it is out of the designated time, the light intensity is measured for the amount of time set by the reference illuminance setting timer setting unit 40 again and averaged to calculate the reference intensity, and the first lamp 90 is turned on. After outputting the memory, the light intensity value of the first lamp 90 is memorized and if the average illuminance value measured after a certain time is less than the standard illuminance value and at the same time it is less than the illuminance value at the time of illuminating the first lamp. 2 When the lamp 100 outputs a lighting signal and the average illuminance value is greater than or equal to the standard illuminance value, the first illuminator signal is output and the amount of light at the time of turning off the first lamp is memorized. At the same time, when the first amount of light or more at the time of turning off the light, a control signal is outputted so as to turn off the second light.

 When the conventional patent is used, the average amount of light input for a predetermined time at an initial time of turning on the lamp is set as a reference illuminance value, and accordingly, by igniting the lamp to maximize the power saving function of the lamp and at the same time separate reference illuminance. Since the value does not need to be specified by the user, the structure of the device can be simplified, and the lighting is turned on or off step by step when installing a plurality of lights so that the user does not recognize the light and shade of the light. By turning on and off the lighting, the lighting of the lighting is turned on so that it does not interfere with learning or work. Also, when the lighting is turned on or off within a certain time when calculating the standard illuminance, the standard illuminance is used. Change the standard roughness value drastically so that it is not included in the value setting It is effective to provide a lamp having a stable power saving function so as not to. Although the fluorescent lamp is exemplified above, dimming the LED is the same concept.

However, in the case of a school or general office, the wall is always on the edge and the glass is installed on it. In winter, the shadow of the wall is long, so the floor near the wall is perceived as dark, which is generally bright. Even in the case where the lamp is strongly lit, the user not only feels the light strongly, but also reduces the power saving effect.

In other words, the school or office has a vertical wall at the edge, so the shadow is long until about 11 o'clock in the morning, and the light sensor on the top judges that it is dark because of the shadow when the floor is recognized. In fact, the human body perceives that the part closer to the vertical wall is brighter than the inner part because of sunlight, because of the sunlight. For this reason, the vertical wall part is used in the automatic control by the illuminance sensor despite the bright sunlight. The strong light to illuminate the power saving effect is also reduced, and the user is forced to feel more uncomfortable than the light emitted by the strong light.

The present invention is to solve the above problems, by reading the shadows generated by the vertical wall to ignore the illuminance extracted from the shadow portion and to correct the brightness of the lamp based on the illuminance near the shadow to illuminate near the vertical wall The purpose is to control dimming more efficiently.

As means for achieving the above object,

The present invention converts and rectifies and outputs AC power to DC power, and to drive the elements constituting various circuits, the power supply unit 10 for outputting the main power to the LED lamp to turn on the lamp; A light sensing unit 20 installed around the LED lamp and sensing the brightness of the bottom surface; An optical sensing time setting unit 30 for setting an input time of light input by the optical sensing unit 20; A reference illuminance setting timer setting unit 40 for automatically setting a reference illuminance by averaging the amount of light in the gap input by the light sensing time setting unit; An average illuminance setting timer setting unit (50) for defining a time for calculating an average illuminance value by averaging the amount of light input to the light detecting unit; A vertical wall shadow reading unit 60 installed around the LED lamp and configured to read a vertical wall shadow formed on a bottom surface of the LED lamp; The light amount data is input at a time interval set by the light sensing time setting unit 30, and then a reference light amount is calculated by averaging the amount of light measured by the time set by the timer setting unit 40 for reference illuminance setting. Calculate the average illuminance averaged during the time specified by the timer setting unit 50 for setting the reference light quantity and the average illuminance, and when the current average illuminance value is higher than the reference illuminance value, the average illuminance value is lowered to the reference illuminance value to match the illuminant. Dimming control in the dark direction, and if the current average illuminance value is lower than the standard illuminance value, the dimming control in the direction in which the light is bright so that the average illuminance value goes up to the reference illuminance value, and the vertical wall shadow reading unit If data is read and the current LED light 90 is read as a vertical wall shadow section, the current illumination value is ignored. Microcomputer 70 and accepts data from the night light illumination existing in the region out of the vertical wall the shadow that the dimming control and; It is connected to the microcomputer and interlocked with the microcomputer located on the side to input / output the data value of the illumination sensor. When the shadow area of the vertical wall occurs, the illumination sensor data value is input from the lighting device located outside the boundary. Characterized in that it comprises a communication module 80 for transmitting and receiving information to the dimming control the lighting device.

In addition, the vertical wall shadow reading unit 60, the camera 61 is installed on one end of the LED lamp; An image receiving unit 62 which receives and stores an image photographed from the camera 61; An image extractor 63 for converting the image image stored in the image receiver 62 into a black and white image; It is characterized in that it comprises a coordinate system calculation unit 64 for reading a black or white position in the black and white image produced by the image extraction unit 63.

In addition, when the power switch is turned on for the first time, the microcomputer receives the illuminance value from the bottom surface photodetector 20, and receives the illuminance value continuously at the time interval specified by the photodetection time setting unit 30 (S10). ; Determining the reference illuminance value by averaging the input illuminance value for a predetermined time by the reference illuminance setting timer setting unit 40 and storing the reference illuminance value (S20); Calculate the average illuminance value by averaging the input illuminance value for the time set by the average illuminance setting timer setting unit 50 (about 5 minutes), but discard the initial data for the specified time, add the final data, and average the average Comparing the illuminance value with the reference illuminance value (S30); Receiving vertical wall shadow information input from the coordinate system calculating unit 64 (S40); If the current average illuminance value is higher than the standard illuminance value, the dimming control is performed in the direction in which the lamp is dark so that the average illuminance value is lowered to the reference illuminance value so that the average illuminance value is lower than the standard illuminance value. Dimming control in a direction in which the lamp is brightened so that the average illuminance value rises up to the reference illuminance value if it is low (S50); In the case of the vertical wall shadow section, the illuminance sensor data such as a light which does not belong to the vertical wall shadow section is input through the communication module 80, and if the current average illuminance value is higher than the standard illuminance value, the average illuminance value goes down to the reference illuminance value and matches. Dimming control in the direction in which the lamp is dark to ensure that, if the current average illuminance value is lower than the standard illuminance value, dimming control in the direction in which the illuminator lights up so that the average illuminance value goes up to the reference illuminance value (S60). It is characterized by consisting of.

As described above, the shadow generated by the vertical wall is read and the illumination extracted from the shadow portion is ignored, and the brightness of the lamp is corrected based on the illuminance near the shadow, so that the dimming of the lighting near the vertical wall can be more efficiently controlled. There is an effect, thereby eliminating the glare of people studying or working in the vicinity of the vertical wall has the effect of maximizing the power saving effect.

1 and 2 is a configuration diagram of a conventional automatic power saving device.
Figure 3 is a block diagram of the LED lighting device circuit configuration dimming control of the present invention.
4 is a flowchart showing the operational flow of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

Figure 3 is a block diagram of the LED lighting device circuit configuration dimming control of the present invention.

4 is a flowchart showing the operational flow of the present invention.

Before explaining the present invention in detail, the concept of the present invention will be briefly described as follows.

In general, a vertical wall is installed in a school or an office, and a glass window is usually installed on an upper portion of the vertical wall.

The vertical wall is perpendicular to the floor. At this time, when sunlight comes in from the outside, the sun rises a little from the ground initially, so a long vertical wall shadow is generated. Vertical wall shadows are created.

In a school or an office, a plurality of lighting devices such as LEDs or fluorescent lights are usually arranged. The lighting device can be dimmed according to the external lighting. Can be dimmed by

However, in summer, the shadow is formed from the vertical wall shortly, so there is no problem in dimming the lighting device by sensing the illuminance of the floor, but in the winter, since the shadow is formed long from the vertical wall, the floor surface near the window is low. In fact, the mechanical value measured by the bright light condition or the illumination sensor is judged to be low illuminance, and dimming control to increase the brightness of the lighting device.

As a result, the glare phenomenon occurs due to too bright lighting at the side of the window, and there is a discontinuation of power saving.

The present invention can grasp the shadow generated from the vertical wall installed in the window side to receive dimming control by receiving the illumination outside the shadow area when the shadow area can be made to prevent glare or to save power.

To this end, the present invention further provides a means for determining a shadow area on the window side lighting device, and determines the shadow area on the window side, and receives the data value of the illuminance sensor from the lighting device present in the bright part of the room based on this. Perform dimming control of the lighting device.

That is, when sunlight shines on the window, shadows are generated due to the vertical wall, so the indoor side generates the shadow part and the shadowless part, and the illumination sensor data value is read through the communication module from the lighting device outside the shadow boundary. The dimming control of the lighting device is performed.

As a result, the window-side lighting device can enjoy the same effect as dimming control when sunlight is emitted, thereby eliminating glare and enjoying power savings.

Hereinafter will be described in more detail of the present invention.

The components of the present invention are largely the power supply unit 10, the bottom surface light sensing unit 20, the light sensing time setting unit 30, the reference illumination setting timer setting unit 40, and the average illuminance setting The timer setting unit 50, the vertical wall shadow reading unit 60, the microcomputer 70, the communication module 80, the LED lamp 90 is composed of.

The power supply unit 10 converts and rectifies the applied AC power into DC power, outputs the same, drives elements constituting various circuits, and outputs a main power to a lamp to light a lamp.

The light detecting unit 20 is referred to as a CdS sensor whose resistance value changes according to the brightness of the surroundings, and uses photoconductive cells (CdSPhotoconductive cells) mainly composed of CdS (cadmium sulfide). The photosensitive unit 20 converts the internal resistance corresponding to the irradiation light energy by the brightness of the ambient light by the characteristics of the CdS photoconductive cell. That is, the light sensing unit 20 outputs to the microcomputer 60 a proportional light sensing signal of an internal resistance which is converted in correspondence with the sensed ambient light. At this time, the light detecting unit 20 outputs a low resistance value as the ambient irradiated light (incident light energy) is larger, and outputs a large resistance value as the ambient irradiated light is smaller, so that the photodetector 20 operates almost close to an insulator where there is little light energy. The incident energy of the irradiated light causes current to flow by the internal resistance according to the magnitude.

The light sensing time setting unit 30 sets the input time of the light input by the light sensing unit 20. For example, when the light sensing unit is set to 1 second, the light sensing unit checks the data detected by the light sensing unit in units of 1 second and the microcomputer starts the microcomputer. To be sent to. When the light sensing time setting unit is set to 2 seconds, the data detected by the light sensing unit is checked in units of 2 seconds to be transmitted to the microcomputer.

The timer setting unit 40 for setting the reference illuminance is a means for automatically setting the reference illuminance by averaging the amount of light input by the light sensing time setting unit until a predetermined time after the initial lighting is turned on. For example, when the reference illuminance setting timer setting unit 40 inputs 60 minutes, the reference illuminance value is calculated by averaging the amount of light sensed by the gap set in the light sensing time setting unit for 60 minutes after the initial lighting is turned on. do.

The average illuminance setting timer setting unit 50 averages the amount of light for a specified time. In other words, the average illuminance is calculated by averaging for a specified time (approximately 5 minutes), but during the specified time, the initial data is discarded, the final data is summed, and the average is continuously processed to continuously subtract the specified time from the current time. We will calculate the average roughness of.

Vertical wall shadow reading unit 60 is a camera 61 is installed at one end of the lamp; An image receiver 62 which receives and stores an image captured by the camera 61; An image extractor 63 for converting the image image stored in the image receiver 62 into a black and white image; And a coordinate system calculator 64 for reading a black or white position in the black and white image generated by the image extractor 63.

The camera 61 serves to photograph the bottom surface at a predetermined time interval.

The image receiver 62 receives and stores an image captured by a camera.

The image extractor 63 converts the image image stored in the image receiver into a black and white image to determine the contrast.

The coordinate system calculator 64 reads the black-and-white image converted by the image extractor to determine whether the image is in the form of a straight line and reads whether the currently photographed image is a vertical wall shadow.

In other words, when the clouds pass, the image is not extracted in the form of a straight line, but the black and white image is extracted with an unspecified pattern. In this case, the data of the general illuminance sensor is input and processed.

The microcomputer 70 receives light quantity data at a time interval set by the light sensing time setting unit 30, and then averages the amount of light measured by the time set by the timer setting unit 40 for setting the reference illuminance and then stores the reference light quantity. Calculates the average illuminance averaged for the time specified by the reference light intensity and the average illuminance setting timer setting unit 50, and if the current average illuminance value is higher than the reference illuminance value, the average illuminance value is lowered to the reference illuminance value. Dimming control is performed in the direction in which the light is dark to match, and dimming control is performed in the direction in which the light is bright to match the average illuminance value up to the standard illuminance value if the current average illuminance value is lower than the reference illuminance value.

At this time, when the microcomputer 70 receives the data of the coordinate system calculation unit 64 and reads that the LED lamp 90 is the vertical wall shadow section, the microcomputer 70 ignores the illuminance value currently measured and is present in the section outside the vertical wall shadow. Dimming control is performed by receiving illuminance data of a lamp.

The communication module 80 is connected to the microcomputer and inputs and outputs the data of the illumination sensor in conjunction with the microcomputer located on the side. When the vertical wall shadow area occurs, the illumination sensor data value from the lighting device outside the boundary position And then the dimming control of the lighting device.

Looking at the control sequence of the present invention through the flow chart below.

First, when the power switch is turned on for the first time, the controller receives the illuminance value from the bottom surface photodetector 20, and receives the illuminance value continuously at the time interval specified by the photodetection time setting unit 30 (S10).

Then, the reference illuminance setting timer setting unit 40 determines the reference illuminance value by averaging the input illuminance value for a specified time period and stores the memory (S20).

After that, the average illuminance value is averaged for a predetermined time (about 5 minutes) by the average illuminance setting timer setting unit 50, and the average illuminance value is calculated. The average illuminance value and the reference illuminance value are compared (S30).

At this time, the vertical wall shadow information input from the coordinate system calculation unit 64 is simultaneously received (S40).

Then, if it is not a vertical wall shadow section, if the current average illuminance value is higher than the standard illuminance value, the dimming control is performed in the direction in which the lamp is dark so that the average illuminance value goes down to the reference illuminance value and the current average illuminance value is the standard illuminance. If the value is lower than the value, the dimming control is performed in the direction in which the lamp is brightened so that the average illuminance value rises up to the reference illuminance value (S50).

In the above step, when the vertical wall shadow section receives the illumination sensor data such as a light that does not belong to the vertical wall shadow section through the communication module 80, if the current average illuminance value is higher than the reference illuminance value, the average illuminance value is the standard illuminance. Dimming control in the direction in which the lamp is dark to go down and match the value, and dimming control in the direction in which the lighting is bright to make the average illuminance value go up to the standard illuminance value if the current average illuminance value is lower than the standard illuminance value. (S60).

10: Power supply
20: bottom surface light sensing unit
30: light detection time setting unit
40: timer setting unit for setting the standard illuminance
50: timer setting unit for setting the average illuminance
60: vertical wall shadow reader
61: camera
62: video receiver
63: image extraction unit
64: coordinate system calculation unit
70: Microcomputer
80: communication module
90: LED lighting

Claims (3)

A power supply unit 10 for converting and rectifying AC power into DC power and outputting the same, driving elements constituting various circuits, and outputting a main power to an LED lamp to light a lamp;
A light sensing unit 20 installed around the LED lamp and sensing the brightness of the bottom surface;
An optical sensing time setting unit 30 for setting an input time of light input by the optical sensing unit 20;
A reference illuminance setting timer setting unit 40 for automatically setting a reference illuminance by averaging the amount of light in the gap input by the light sensing time setting unit;
An average illuminance setting timer setting unit (50) for defining a time for calculating an average illuminance value by averaging the amount of light input to the light detecting unit;
A vertical wall shadow reading unit 60 installed around the LED lamp and configured to read a vertical wall shadow formed on a bottom surface of the LED lamp;
The light amount data is input at a time interval set by the light sensing time setting unit 30, and then a reference light amount is calculated by averaging the amount of light measured by the time set by the timer setting unit 40 for reference illuminance setting. Calculate the average illuminance averaged during the time specified by the timer setting unit 50 for setting the reference light quantity and the average illuminance, and when the current average illuminance value is higher than the reference illuminance value, the average illuminance value is lowered to the reference illuminance value to match the illuminant. Dimming control in the dark direction, and if the current average illuminance value is lower than the standard illuminance value, the dimming control in the direction in which the light is bright so that the average illuminance value goes up to the reference illuminance value, and the vertical wall shadow reading unit If data is read and the current LED light 90 is read as a vertical wall shadow section, the current illumination value is ignored. Microcomputer 70 and accepts data from the night light illumination existing in the region out of the vertical wall the shadow that the dimming control and;
It is connected to the microcomputer and interlocked with the microcomputer located on the side to input / output the data value of the illumination sensor. When the shadow area of the vertical wall occurs, the illumination sensor data value is input from the lighting device located outside the boundary. LED lighting device capable of dimming control, comprising a communication module (80) for transmitting and receiving information to the dimming control the lighting device. The method of claim 1,
Vertical wall shadow reading unit 60,
A camera 61 installed at one end of the LED lamp;
An image receiving unit 62 which receives and stores an image photographed from the camera 61;
An image extractor 63 for converting the image image stored in the image receiver 62 into a black and white image;
LED lighting device capable of dimming control, characterized in that it comprises a coordinate system calculation unit (64) for reading a black or white position in the black and white image produced by the image extraction unit (63). When the power switch is turned on for the first time, the control unit receives an illuminance value from the bottom surface photodetector 20, and receives the illuminance value continuously at a time interval designated by the photodetection time setting unit 30 (S10);
Determining the reference illuminance value by averaging the input illuminance value for a predetermined time by the reference illuminance setting timer setting unit 40 and storing the reference illuminance value (S20);
Calculate the average illuminance value by averaging the input illuminance value for the time set by the average illuminance setting timer setting unit 50 (about 5 minutes), but discard the initial data for the specified time, add the final data, and average the average Comparing the illuminance value with the reference illuminance value (S30);
Receiving vertical wall shadow information input from the coordinate system calculating unit 64 (S40);
If the current average illuminance value is higher than the standard illuminance value, the dimming control is performed in the direction in which the lamp is dark so that the average illuminance value is lowered to the reference illuminance value so that the average illuminance value is lower than the standard illuminance value. Dimming control in a direction in which the lamp is brightened so that the average illuminance value rises up to the reference illuminance value if it is low (S50);
In the case of the vertical wall shadow section, the illuminance sensor data such as a light which does not belong to the vertical wall shadow section is input through the communication module 80, and if the current average illuminance value is higher than the standard illuminance value, the average illuminance value goes down to the reference illuminance value and matches. Dimming control in the direction in which the lamp is dark to ensure that, if the current average illuminance value is lower than the standard illuminance value, dimming control in the direction in which the illuminator lights up so that the average illuminance value goes up to the reference illuminance value (S60). LED lighting method capable of dimming control, characterized in that consisting of.

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