JPH11111471A - Automatic dimming system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct an illuminance distribution even when the illuminance distribution is significantly different from the desired illuminance distribution by the influence of the outside world, the illuminance deterioration of a luminaire, or the dispersion of illuminance resulting from the individual difference of lamps. SOLUTION: The execution of initial setting and the input of setting illuminance is conducted from an input portion 1. An illuminance data is read in from a data storage portion 7 on demand by a dimming pattern computation portion 2 and a computed dimming pattern is output. A lighting portion 4 is dimming controlled in respective lighting blocks in response to the dimming pattern and is lighted on by a dimming control portion 3. The illuminance of respective light receiving portions is measured by the respective light receiving portions A5a,..., N5n of a light receiving portion 5, and the measured receiving light illuminance data is stored in a data storage portion 7 on demand. An error determination portion 6 judges whether required illuminance is obtained or not, and when an error is large, re-computation instruction is output. The processing is repeated until the error converges to a certain range.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic light control system, and more particularly to an automatic light control system capable of automatically resetting the illuminance when the received illuminance changes.

[0002]

2. Description of the Related Art As an example of a conventional technique of this kind, there is a "tunnel lighting system" described in Japanese Patent Laid-Open No. Hei 4-118892.

This conventional example will be described with reference to FIGS. 27, 28 and 29. FIG. FIG. 27 is a system block diagram showing an example of a conventional dimming system, FIG. 28 is a diagram showing an example of a dimming degree data table in FIG.
FIG. 28 is a diagram showing an example of the illuminance distribution in the tunnel obtained in FIG. 27, and the contents are the same as those described in the above publication.

The dimming system shown in FIG. 27 includes a system control unit 100 and a plurality of lighting devices 20a,.
n.

[0005] The system control unit 100 includes an illuminance data storage unit 101 for storing dimming degree data for obtaining illuminance according to the external situation, and an external environment for detecting the external illuminance and the like for grasping the external situation. Status grasping unit 102
The data of the required dimming degree is read from the illuminance data storage unit 101 from the illuminance of the outside world, and the lighting fixtures 20a,.
0n, and a control circuit section 103 that outputs a control signal.

Each of the luminaires 20a,..., 20n has the same configuration. For example, the luminaire 20a has a dimming control data memory 21 storing control data required for dimming control, and a system control A controller 22 for reading necessary control data from a dimming control data memory 21 in accordance with an instruction from the unit 100, and a lighting lamp 23 are provided.

Next, the operation of this conventional example will be described using an example of illuminating a tunnel. Here, for the sake of simplicity, it is assumed that the illuminance data storage unit 101 has three types of data shown in FIG.

When the illuminance outside the tunnel is output from the external situation grasping unit 102, the control circuit 103 determines, for example, “fine weather” from the data, and stores the dimming degree data in the fine weather from the illuminance data storage unit 101. , And outputs the dimming degree data to each of the lighting devices 20a,..., 20n. As a specific example, as shown in FIG. 28, each lighting fixture 20a, 20b, 20c, 20d, 20e, 20f,.
Dimming degree data 100, 100, 90, 80, 70,
.. Are output respectively.

In each of the lighting fixtures 20a,..., 20n receiving the dimming degree data, the controller 22 reads dimming control data for realizing the dimming degree from the dimming control data memory 21 and controls the lamp 23. Turn on. Thereby, the illuminance distribution in the tunnel at the time of fine weather as shown in FIG. 29 is obtained.

When the control circuit 103 determines that the weather is more cloudy, similarly, it outputs the dimming degree data when the weather is more cloudy to each of the lighting fixtures 20a,.
As shown in FIG. 9, the illuminance distribution in the tunnel in a cloudy day can be obtained.

[0011]

However, in this conventional dimming system, there is no means for measuring the actual illuminance and no means for reflecting the actual illuminance. However, even if the illuminance distribution is largely deviated from the desired distribution due to the illuminance variation due to the individual difference of the lamp, there is a problem that it cannot be corrected.

Further, the illuminance distribution is obtained by a plurality of luminaires interacting with each other. However, in the above-mentioned conventional dimming system, there is no means for calculating a dimming degree data table value. It is extremely difficult to determine the dimming degree of each lighting fixture from the distribution, and there has been a problem that a great deal of labor is required to realize a fine illuminance distribution.

Accordingly, a first object of the present invention is to provide an automatic light control system that can automatically perform optimum light control by only inputting necessary illuminance data. A second object of the present invention is to provide an automatic dimming system that can automatically perform optimal dimming even when the illuminance changes due to dirt, damage, or the life span of a lighting fixture. It is in. Further, a third object of the present invention is to provide an automatic light control system that can automatically perform optimum light control even when the illuminance of a space to be illuminated changes due to the influence of the outside world or the like. is there.

[0014]

According to the present invention, at least an instruction of illuminance data measurement and setting of a desired illuminance are provided for an illumination system having at least one illumination block which can independently control dimming for each illumination block. And a dimming pattern that obtains at least the number of dimming levels and initial illuminance data from the data storage unit according to an instruction from the input unit, calculates a dimming pattern indicating a combination of dimming levels, and outputs the dimming pattern A calculating unit, a dimming control unit that independently controls dimming of the lighting unit for each lighting block according to the specified dimming pattern, a light receiving unit that outputs illuminance measured at at least one point, and the input unit. Calculating an error between the set illuminance data set by the light receiving unit and the received illuminance data received by the light receiving unit, and when the error exceeds a predetermined threshold, the light control is performed. Automatic light system; and a prediction error decision unit for instructing the turn recalculation is obtained.

The data storage unit records and stores illuminance data from the light receiving unit, and the error determination unit calculates an error from the set illuminance data and the received illuminance data read from the data storage unit. An automatic dimming system characterized by comparing with the threshold value is obtained.

Further, an automatic dimming system is provided, wherein the error determining unit calculates an error between the set illuminance data and the received illuminance data by an error calculation method including a least square method.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the operation of the automatic light control system of the present invention will be described.

First, as an initial setting, an operation of measuring how much illuminance is obtained in each light receiving unit by dimming of each illumination block will be described.

An initial setting command is input from the input unit to the dimming pattern calculation unit. Here, the initial data is obtained as follows.

That is, first, all the illumination blocks are turned off, and the received illuminance data of the light receiving section is measured as an offset value. Then turn on only one lighting block,
All other lighting blocks remain off.

Then, the illuminance of the lit one illumination block is measured in all dimming stages, and the difference from the offset value is stored in the data storage unit. This is sequentially performed for all the illumination blocks.

The dimming pattern calculation unit issues an instruction for the dimming pattern, and the dimming control unit controls the dimming of each block according to the instruction. Thereafter, the received light illuminance data from each light receiving unit is stored in the data storage unit.

By the above processing, it is possible to grasp how much illuminance each initial light receiving section gives to each light receiving section for each dimming level of each illumination block (initial illuminance data).

Next, the operation of illuminating with the optimal dimming pattern when the required illuminance is set will be described.

The illuminance for each light receiving unit is set from the input unit. On the other hand, the dimming pattern calculation unit reads the initial illuminance data from the data storage unit and calculates the theoretical value of the illuminance received by each light receiving unit for all the dimming patterns.

[0026]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a system block diagram showing one embodiment of an automatic light control system of the present invention, and FIG. 2 is an image view of a room to be used in the first to fifth embodiments of the present invention as viewed from a ceiling. .

Referring to FIG. 2, two illumination blocks 41 and 42 are provided in a room to be subjected to the first to fifth embodiments.
And two light receiving units 51 and 52 are arranged. And there is a window in the room, and each light receiving section 51,5
2 shall be influenced by the outside world.

Each of the lighting blocks 41 and 42 performs dimming at three dimming levels. That is,
The dimming levels “0” to “3” indicate the degree of dimming,
“0” is turned off, “1” is turned on in the first stage, and “2” is turned on in the second stage.
Stage lighting, "3" is full lighting.

Further, referring to FIG. 1, it is assumed that three dimming steps and two lighting blocks are registered in the data storage unit 7 in advance.

First, since the initial setting needs to be performed only once in advance, an instruction to execute the initial setting is output from the input unit 1 to the dimming pattern calculating unit 2. The dimming pattern calculation unit 2 reads the number of dimming stages and the number of illumination blocks from the data storage unit 7, and calculates a dimming pattern to be measured as an initial setting.

FIG. 3 is a diagram showing all dimming patterns to be measured as initial illuminance data in the first embodiment of the present invention, in which both of the illumination blocks 41 and 42 have dimming levels "0" (extinguished). Light pattern, the dimming pattern in which the lighting block 42 changes from dimming level “0” (light off) and the lighting block 41 changes from dimming level “1” to “3”, and the dimming level “0” (light off) ) Shows a total of seven dimming patterns in which the illumination block 42 changes from dimming levels “1” to “3”.

FIG. 4 is a diagram showing an example of the offset value in the first embodiment of the present invention. The light receiving illuminance (offset value) of the light receiving units 51 and 52 when the illumination blocks 41 and 42 are completely turned off as a dimming combination. ) Are 400 lux (lx) and 500 lx, respectively.

The dimming control section 3 controls dimming of each of the illumination blocks 41 and 42 of the illumination section 4 based on the dimming pattern shown in FIG. Then, for each light control pattern, each light receiving unit 51, 5
The illuminance data received in step 2 is recorded.

First, all the lighting units A4a,
.., The illumination unit M4m is turned off, and the offset value shown in FIG. 4 is measured.

FIG. 5 is a diagram showing an example of the measured illuminance of the light receiving unit in the first embodiment of the present invention. Each of the light receiving units 51 and 52 when the illumination block 41 is turned on at the dimming level "1".
Are shown to be 800 lx and 740 lx, respectively.

FIG. 6 is a diagram showing an example of the initial illuminance data of each light receiving section in the first embodiment of the present invention, and FIG. 7 is a diagram showing each of the full dimming patterns in the first embodiment of the present invention. It is a figure showing a list of initial illuminance data of a light sensing portion.

From the measured illuminances 800 lx and 740 lx of the light receiving units 51 and 52 shown in FIG. 5, the offset value 4 shown in FIG.
400l after deducting 00lx and 500lx respectively
x and 240lx are stored in the data storage unit 7 as the initial illuminance data shown in FIG. Similarly, measurement is performed for all the dimming combinations shown in FIG. 3, and the results shown in FIG. 7 are obtained.

The initial setting is automatically completed by the above processing operations, and the initial illuminance data is stored in the data storage unit 7.

It should be noted that once the initial setting has been performed, there is no need to perform the initial setting again unless the difference between the initial illuminance data and the actual illuminance data increases.

Next, a second embodiment of the present invention will be described with reference to the drawings.

FIG. 8 is a diagram showing a list of theoretical illuminances calculated for all dimming patterns according to the second embodiment of the present invention, and FIG. 9 is set for all dimming patterns according to the second embodiment of the present invention. FIG. 10 is a diagram illustrating a theoretical error with respect to illuminance, FIG. 10 is a diagram illustrating a measured illuminance of a light receiving unit having a minimum theoretical error in the second embodiment of the present invention, and FIG. 11 is a second embodiment of the present invention. FIG. 12 is a diagram showing a list of theoretical values of recalculated illuminance in FIG. 12, and FIG. 12 is a diagram showing a list of recalculated theoretical errors in the second embodiment of the present invention.

In the second embodiment, it is assumed that a conference is held in the same room (shown in FIG. 2) as in the first embodiment, and the initial illuminance data is stored in the data storage unit 7.

Referring to FIGS. 1 and 2 and FIGS. 7 to 12, first, the illuminance is set from the input unit 1 according to the purpose of use of the room. Generally, room illumination is 600
Since lx to 1000 lx are preferable, the set illuminance for the light receiving units 51 and 52 is input as 1000 lx.

The dimming pattern calculation unit 2 reads the initial illuminance data shown in FIG. 7 from the data storage unit 7, calculates the theoretical illuminance value from the equation (1), and adjusts the dimming of all the dimming patterns 1,. The theoretical illuminance is calculated for the combination to obtain the result shown in FIG.

On the other hand, the result of calculating the theoretical error from the set illuminance by the equation (2) is shown in FIG. Then, since the one with the smallest theoretical error is selected, the dimming pattern 11 with the theoretical error 86 is selected.

The dimming control section 3 controls the dimming of each of the illumination blocks 41 and 42 according to the dimming pattern 11 to light them in the second stage “2”. At this time, as shown in FIG. 10, the measured illuminance of each of the light receiving units 51 and 52 is 123
0lx and 1350lx. This is due to the influence of the outside world through the window (300 lx, 40 respectively).
0x).

On the basis of the measured data, the error determination section 6 calculates an actually measured error. Here, when equation (4) is used as the calculation equation, the actual measurement error is “419”. If the threshold for performing the recalculation is set to “200”, since the actually measured error 419> the threshold 200, the recalculation instruction is output from the error determination unit 6 to the dimming pattern calculation unit 2.

The dimming pattern calculation unit 2 calculates a theoretical error again based on the initial illuminance data shown in FIG. 7 and the theoretical illuminance data shown in FIG. Here, Expressions (4) to (6) are used as the calculation expressions, the results shown in FIGS. 11 and 12 are obtained, and the dimming pattern 6 with the minimum theoretical error “112” in FIG. 12 is selected.

The dimming control unit 3 controls the dimming of each of the illumination blocks 41 and 42 according to the dimming pattern 6 and turns on each of them at the first stage “1”. At this time, each light receiving section 51, 5
The theoretical illuminance data of No. 2 was 8 as shown in FIG.
90lx and 980lx, and the actually measured error calculated by the error determination unit 6 is "112". This is compared with the threshold "200", and the measured error 112 <the threshold 200, so the process ends.

By the above processing operation, in the second embodiment, an optimal dimming pattern is automatically obtained.

Next, a third embodiment of the present invention will be described with reference to the drawings.

FIG. 13 is a diagram showing a part of the recalculated theoretical illuminance in the third embodiment of the present invention. FIG. 14 is a graph showing one example of the recalculated theoretical error in the third embodiment of the present invention. It is a figure which shows a part.

In the third embodiment, it is assumed that the dimming pattern 6 is finally selected under the same conditions as in the second embodiment. Here, consider a case where the influence from the outside world changes due to cloudy weather or the like.

As shown in FIG. 13, each of the light receiving units 51 and 52 is changed due to a great change in the influence from the outside.
Measured data are 790lx and 780l, respectively.
It is assumed that the value has dropped to x.

As shown in FIG. 14, the actually measured error of the error judging section 6 is "304".
Since it is 00, recalculation is performed.

Then, as a result of the recalculation, the dimming pattern 10 shown in FIG. 13 is selected. From FIG. 14, the actual measurement error at this time is “117”, and the actual measurement error 117 <the threshold 20
Since it is 0, the process ends.

As described above, in the third embodiment, even when the influence from the external environment changes, an optimum dimming pattern is automatically obtained by the above-described processing operation.

Next, a fourth embodiment of the present invention will be described with reference to the drawings.

FIG. 15 is a diagram showing a list of actual initial illuminance data in the fourth embodiment of the present invention, and FIG. 16 shows a part of the recalculated theoretical error in the fourth embodiment of the present invention. FIG. 17 is a diagram showing a part of the theoretical error recalculated again in the fourth embodiment of the present invention,
FIG. 18 is a diagram showing a part of the measurement error in the fourth embodiment of the present invention.

In the fourth embodiment, it is assumed that, under the same conditions as in the second embodiment, the illuminance of the illuminating unit has decreased after the date and time since the initial setting was performed. At this time, the actual initial illuminance data has the values shown in FIG. 15, but how the optimal dimming pattern is selected when FIG. 15 is not obtained will be described.

In the fourth embodiment, as in the second embodiment, the set illuminance is 1000 lx, and the offsets from the outside are 300 lx and 400 lx, respectively.

First, the dimming pattern 11 is selected, and the lighting unit 4 is turned on according to the dimming pattern 11. At this time, the measurement data of each of the light receiving sections 51 and 52 is 11
70lx and 1230lx, and the actual measurement error 286 of the error determination unit 6 shown in FIG.

When recalculation is performed based on the measurement data from each of the light receiving sections 51 and 52 and the initial illuminance data shown in FIG. 7, the theoretical error 1 in the dimming pattern 4 is obtained from FIG.
It can be seen that 8 is minimum.

When the illuminating section 4 is turned on in accordance with the dimming pattern 4 to measure an actual measurement error, the same calculation is performed to obtain FIG.
The actual measurement error 370 shown in FIG. Therefore, as a result of the instruction for recalculation again, the theoretical error 60 of the light control pattern 10 is minimized from FIG. 17, and the actual measurement error 102 <threshold 200 from FIG.

In the conventional system in which the illuminance is not reflected, as shown in the second embodiment, the dimming pattern 6 is fixedly selected, and the actual measurement error at this time is "175". On the other hand, as shown in FIG. 18, the actually measured error “102” of the dimming pattern 10 selected in the present embodiment.
18 is not only smaller than the fixed light control pattern 6 of the related art but also an optimum light control pattern.

As described above, in the fourth embodiment, even when the illuminance of the illuminating unit is lowered, a better dimming pattern than the conventional dimming pattern is automatically selected by the above-described processing operation.

Next, a fifth embodiment of the present invention will be described with reference to the drawings.

FIG. 19 is a diagram showing a list of actual initial illuminance data in the fifth embodiment of the present invention. FIG. 20 shows a part of the recalculated theoretical error in the fifth embodiment of the present invention. FIG. 21 is a diagram showing a part of the theoretical error recalculated again in the fifth embodiment of the present invention;
FIG. 22 is a diagram showing a part of the measurement error in the fifth embodiment of the present invention.

In the fifth embodiment, it is assumed that the illuminance of the illuminating unit is considerably reduced after the date and time have passed since the fourth embodiment. At this time, the actual initial illuminance data has the values shown in FIG. 19, and the other conditions are the same as those in the fourth embodiment.

When the same calculation as in the fourth embodiment is performed, it is impossible to escape from the non-optimal dimming pattern 8, as can be seen from FIGS.

Therefore, when such a situation occurs, the light is illuminated with the light control pattern 8. Then, if the initial illuminance data is measured again, the optimum dimming pattern 10 can be obtained from FIG.
Can be easily understood from the description of the first and second embodiments.

Therefore, if the setting is made so that an alarm is automatically issued, it is possible to take a countermeasure at an early stage, and the present invention is effective even in a remote lighting system or the like.

Next, a sixth embodiment of the present invention will be described with reference to the drawings.

The sixth embodiment is a state in which the present invention is applied to illumination in a tunnel, and it is assumed that initial illuminance data has been obtained in advance.

FIG. 23 is a schematic diagram showing an arrangement in a tunnel according to the sixth embodiment of the present invention, and FIG. 24 is a diagram showing an example of the set illuminance in the sixth embodiment of the present invention.
FIG. 25 is a diagram showing an example of the illuminance distribution obtained in the sixth embodiment of the present invention, and FIG. 26 is an example of the illuminance distribution obtained when the illuminance is reduced in the sixth embodiment of the present invention. FIG.

In the tunnel according to the present embodiment, the illuminating units 41, 42, 43, 44, 45, 46, 47, 48, 4
9 and the light receiving sections 52, 53, 54, 55, 56, etc. are shown in FIG.
It is arranged as shown in FIG. Note that the light receiving unit 51 is arranged outside the tunnel entrance.

In FIG. 24, the set illuminance is set as a ratio to the light receiving unit 51 for measuring the illuminance outside the tunnel.

Thus, as shown in FIG. 25, a fine illuminance distribution can be easily obtained automatically corresponding to the illuminance outside the tunnel.

Further, when the illuminance of each lighting unit is reduced due to contamination by exhaust gas or the like, there is no improvement in the conventional method. As shown in (1), an optimal dimming pattern can be obtained. From FIG. 26, for the illuminance distribution c in the conventional method,
It can be seen that the illuminance distribution a obtained by the sixth embodiment is extremely close to the desired illuminance distribution b.

In the second to fifth embodiments, the number of illumination blocks is 2, the number of light receiving sections is 2, and the number of dimming steps is 3. However, as in the sixth embodiment, The present invention can be applied to any number of these numbers.

[0083]

As described above, according to the present invention, the illuminance can be finely adjusted by the dimming control reflecting the actual measured illuminance, so that an appropriate dimming pattern is selected according to the situation. Therefore, there is an effect that it is possible to cope with an influence from the outside world and a decrease in illuminance of the lighting equipment.

Since the initial illuminance data is measured in advance and the relationship between the dimming level and the illuminance is theoretically calculated, it is only necessary to input the required illuminance. Therefore, there is an effect that a desired illuminance can be obtained even if the operator of the automatic dimming system of the present invention does not grasp the relationship between the dimming level and the illuminance.

Further, since the reflection of the illuminance data and the judgment formulas are converted into numerical values and can be processed by a computer, the entire processing is automated, so that time and labor are reduced as compared with the conventional case, and manual setting is performed. This has the effect of eliminating individual differences and time delays in the illuminance distribution due to, and enabling stable operation.

[Brief description of the drawings]

FIG. 1 is a system block diagram showing one embodiment of an automatic light control system of the present invention.

FIG. 2 is an image view of a room to be subjected to the first to fifth embodiments of the present invention as viewed from a ceiling.

FIG. 3 is a diagram showing all dimming patterns to be measured as initial illuminance data in the first embodiment of the present invention.

FIG. 4 is a diagram illustrating an example of an offset value according to the first embodiment of the present invention.

FIG. 5 is a diagram illustrating an example of measured illuminance of a light receiving unit according to the first embodiment of the present invention.

FIG. 6 is a diagram illustrating an example of initial illuminance data of each light receiving unit according to the first embodiment of the present invention.

FIG. 7 is a diagram showing a list of initial illuminance data of each light receiving unit in a full dimming pattern according to the first embodiment of the present invention.

FIG. 8 is a diagram showing a list of theoretical illuminances calculated for all dimming patterns according to the second embodiment of the present invention.

FIG. 9 is a diagram showing a theoretical error from a set illuminance for all dimming patterns in the second embodiment of the present invention.

FIG. 10 is a diagram illustrating measured illuminance of a light receiving unit having a minimum theoretical error according to the second embodiment of the present invention.

FIG. 11 is a diagram showing a list of theoretical values of illuminance recalculated in the second embodiment of the present invention.

FIG. 12 is a diagram showing a list of recalculated theoretical errors in a second embodiment of the present invention.

FIG. 13 is a diagram showing a part of the recalculated theoretical illuminance in the third embodiment of the present invention.

FIG. 14 is a diagram showing a part of the recalculated theoretical error in the third embodiment of the present invention.

FIG. 15 is a diagram showing a list of actual initial illuminance data in the fourth embodiment of the present invention.

FIG. 16 is a diagram showing a part of the recalculated theoretical error in the fourth embodiment of the present invention.

FIG. 17 is a diagram illustrating a part of the theoretical error recalculated again in the fourth embodiment of the present invention.

FIG. 18 is a diagram showing a part of an actually measured error in the fourth embodiment of the present invention.

FIG. 19 is a diagram showing a list of actual initial illuminance data in the fifth embodiment of the present invention.

FIG. 20 is a diagram showing a part of the recalculated theoretical error in the fifth embodiment of the present invention.

FIG. 21 is a diagram showing a part of the theoretical error recalculated again in the fifth embodiment of the present invention.

FIG. 22 is a diagram showing a part of an actually measured error in the fifth embodiment of the present invention.

FIG. 23 is a schematic view showing an arrangement in a tunnel according to a sixth embodiment of the present invention.

FIG. 24 is a diagram illustrating an example of the set illuminance in the sixth embodiment of the present invention.

FIG. 25 is a diagram showing an example of an illuminance distribution obtained in a sixth embodiment of the present invention.

FIG. 26 is a diagram illustrating an example of an illuminance distribution obtained when the illuminance decreases in the sixth embodiment of the present invention.

FIG. 27 is a system block diagram illustrating an example of a conventional light control system.

28 is a diagram illustrating an example of a dimming degree data table in FIG. 27.

FIG. 29 is a diagram showing an example of the illuminance distribution in the tunnel obtained in FIG. 27;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Input part 2 Light control pattern calculation part 3 Light control control part 4 Lighting part 4a, 4m Lighting part A, lighting part M 5,51,52,53,54,55,56 Light receiving part 5a, 5n Light receiving part A, light receiving Section N 6 error determination section 7 data storage section 20a, 20b, 20c, 20d, 20e, 20f, 2
0n Lighting fixture 21 Dimming control data memory 22 Controller 23 Lamp 41, 42, 43, 44, 45, 46, 47, 48, 4
Reference Signs List 9 lighting block 100 system control unit 101 illuminance data storage unit 102 external situation grasping unit 103 control circuit unit a illuminance distribution obtained by the sixth embodiment b desired illuminance distribution c illuminance distribution in conventional method

Claims (3)

[Claims] An input unit for instructing at least illumination data measurement and setting a desired illumination for an illumination system having at least one illumination block that can independently control dimming for each illumination block, and the input unit A dimming pattern calculation unit that obtains at least the number of dimming levels and the initial illuminance data from the data storage unit according to an instruction from and calculates and outputs a dimming pattern indicating a combination of dimming levels, and the specified dimming A dimming control unit that independently controls dimming of a lighting unit for each lighting block according to a pattern; a light receiving unit that outputs illuminance measured at at least one point; illuminance data set by the input unit; Calculating an error from the received illuminance data received by the unit and, when the error exceeds a predetermined threshold, an error determination instructing recalculation of the dimming pattern; An automatic dimming system, comprising: 2. The data storage section records and stores illuminance data from the light receiving section, and the error determination section calculates an error from the set illuminance data and the received illuminance data read from the data storage section. The automatic light control system according to claim 1, wherein the automatic light control system compares the threshold with the threshold. 3. The automatic light control system according to claim 1, wherein the error determination unit calculates an error between the set illuminance data and the received illuminance data by an error calculation method including a least squares method. .