JP2005071767A - Lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system equipped with a lighting control device and a plurality of light-modulating luminaires, and capable of reducing illuminance irregularity. <P>SOLUTION: This lighting system is provided with the lighting control device 4 including a brightness sensor 1, a control part 2, and a light modulation signal output part 3, and also provided with the one or more light-modulating luminaires 7 each having a lamp 5 and a luminous flux level control means for outputting control information allowing the lamp 5 to keep its initial luminous flux level at the time of replacement of the lamp, and capable of controlling the light modulation level of the lamp 5 based on the control information and the light modulation signal by receiving the control information and the light modulation signal. Since each luminaire 7 can be lit at a light modulation level obtained from a product of a light modulation level based on the light modulation signal and a light modulation level based on the control information in receiving the light modulation signal from the control device 4, the lighting system capable of correcting the dispersion of luminous flux among the luminaires 7, and controlling the illuminance of a lighting object surface nearly at a constant value can be obtained. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an illumination system that performs constant illuminance control using a brightness sensor unit.

  Conventionally, as an illumination system that performs constant illuminance control, as shown in FIG. 12, an illumination control device 4 including a control unit 2, a dimming signal output unit 3, a brightness sensor unit 1, and a dimming lighting circuit unit 6 The thing provided with the some lighting fixture 7 which consists of the lamp 5 can be illustrated.

As an operation of such a lighting system,
[Step 1] The measurement value of the brightness sensor unit 1 is read by the control unit 2 and compared with a preset target sensor value.

  [Step 2] If the result of the comparison calculation in Step 1 is below the target sensor value, the dimming output level is increased by a specified value, and if it exceeds the target sensor value, the dimming output level is decreased by a specified value.

  [Step 3] The dimming output level determined in step 2 is output from the dimming signal output unit 3 as a dimming signal.

  [Step 4] Upon receiving the dimming signal, all the dimming lighting fixtures 7 connected to the lighting control device 4 are all dimmed at a dimming ratio with respect to the full output level.

[Step 5] The illumination control device 4 returns to the operation of Step 1 after a predetermined time. (Feedback control)
By repeating the operation as described above, even if a change in external light level or a change in illumination output occurs, control can be performed so that the illuminance on the surface to be illuminated such as the desk surface has a predetermined illuminance value.

  By the way, when the system is constructed by combining the illumination control device 4 and the dimming lighting fixture 7 as described above, several tens of dimming units are provided in one illumination control device 4 in consideration of cost and the like. Generally, the lighting fixture 7 is connected and controlled.

  At that time, the lighting control device 4 is usually installed in each row of the dimming lighting fixtures parallel to the window side. In this case, if the brightness detection area is wide, the dimming is not controlled. Even the irradiation of the lighting fixture 7 may be detected. On the other hand, if the brightness detection area is too narrow, even the slight change in the reflectance of the illuminated surface such as the floor surface or desk surface of the brightness detection area will react extremely greatly, and the desired operation will be performed. It may not be possible.

  Therefore, in general, the brightness detection area of the illumination control device 4 is often set to about several meters in diameter. As a result, as shown in FIG. 13, the brightness detection area of the illumination control device 4 may not be able to cover the entire irradiation area of the plurality of connected dimming lighting fixtures 7.

  On the other hand, the luminous flux of the dimming lighting fixture generally decreases as the lighting time elapses, and also decreases due to dirt such as lamps and reflectors. Moreover, the luminous flux decrease due to the passage of lighting time varies among individual lamps, and the degree of contamination of lamps, reflectors, etc. varies depending on the usage environment of the dimming lighting fixture. As a result, the luminous fluxes when the lighting devices for dimming are lit at the full output level are scattered.

  Based on such a situation, if constant illuminance control is performed with a system configuration as shown in FIG. 13, it is possible to satisfy the set illuminance as the average illuminance in the brightness detection area, but illuminate other than the detection area. There is a problem that appropriate correction for an insufficient illuminance state or an excessive illuminance state is not performed directly under the light control lighting fixture.

  In order to alleviate such a problem, as shown in FIG. 14, there is a method of limiting the number of dimming lighting fixtures to be controlled so that the brightness detection area and the irradiation area of the dimming lighting fixture are substantially matched. In the end, however, since the output level of each lighting fixture for dimming differs when viewed in a small area, uneven illuminance occurs, which is not a fundamental measure and has the disadvantage of increasing system cost.

  In order to make the lamp output constant, there is a means for periodically exchanging the lamps at the same time. In this case, as shown in FIG. 15, the amount of external light that affects each brightness detection area is different in the blind state. Assuming a different case, the set illuminance is controlled almost within the area, but there may be a case where a large illuminance difference occurs at the boundary portion of the adjacent areas where the illumination lighting levels are different. For example, even if the lamps are replaced at the same time, there is no problem at the beginning of the replacement, but unevenness in illuminance occurs due to the difference in the degree of dirt depending on the use environment and the variation in the luminous flux reduction speed of each lamp.

  Regarding the reduction of illuminance unevenness of a lighting system including a lighting control device and a dimming lighting fixture, in the applicant of the present application, for example, in JP-A-11-233269, particularly between adjacent dimming lighting fixtures. The illumination system which paid attention to the illuminance change etc. of is disclosed.

However, many problems to be solved still remain from the viewpoint of reducing illuminance unevenness in consideration of individual differences among individual lamps of the dimming lighting fixtures constituting the system.
JP 11-233269 A

  The invention of the present application has been made in view of the above-mentioned background art, and an object thereof is to provide an illumination system capable of reducing illuminance unevenness.

  In order to solve the above-described problem, in the illumination system according to the first aspect of the present invention, at least the first brightness sensor unit and the detection output information of the first brightness sensor unit are illuminated. At least one or more illumination control devices including a control unit that controls output of a dimming signal used for controlling the illuminance of the surface substantially constant, and a dimming signal output unit that outputs the dimming signal A lamp, a luminous flux level control means for outputting luminous flux level control information used by the lamp to maintain an initial luminous flux level, and the luminous flux level control information and the dimming signal are received, and An illumination system comprising at least one dimming lighting fixture having a dimming lighting circuit unit capable of controlling the dimming level of the lamp based on the luminous flux level control information and the dimming signal When the light control lighting device receives the light control signal from the lighting control device, the light control level based on the light control signal and the light control level based on the luminous flux level control information The lighting device is lit at a dimming level that is a product of dimming levels for maintaining the initial luminous flux level of the lighting fixture.

  In the illumination system of the invention according to claim 2, in the illumination system according to claim 1, the luminous flux level control means includes a second brightness sensor unit, and the second brightness sensor unit includes: The detection output information is the light flux level control information.

  In the illumination system of the invention according to claim 3, in the illumination system according to claim 2, the second brightness sensor unit measures brightness, and the lamp maintains an initial luminous flux level. The period for performing the correction is that the first brightness sensor unit measures the brightness and is longer than the period for performing the correction for controlling the illuminance of the illuminated surface such as the desk surface to be substantially constant. It is a feature.

  In the illumination system of the invention according to claim 4, in the illumination system according to claim 1, the luminous flux level control means includes a storage means, and the luminous flux attenuation time change data stored in the storage means is: The light flux level control information.

  In the illumination system of the invention according to claim 5, in the illumination system according to claim 4, the dimming lighting fixture is at least a predetermined dimming level from the lighting control device after a predetermined cumulative lighting time has elapsed. It is characterized by having a lamp life notification means for reporting the arrival of the lamp life when the above signal is received.

  In the illumination system of the invention according to claim 6, in the illumination system according to any one of claims 1 to 5, the dimming lighting fixture corresponds to a plurality of different illumination control devices. A plurality of different signal receiving units corresponding to the dimming signal, which are capable of receiving a plurality of different dimming signals, and the signal receiving unit receiving the different dimming signals A dimming of a product of an average value of the dimming levels based on the dimming signals different from each other and a dimming level for maintaining the initial light beam level of the lighting device for dimming based on the light beam level control information It is characterized by lighting at level.

  In the illumination system of the invention according to claim 7, in the illumination system according to any one of claims 1 to 5, the dimming lighting fixture corresponds to a plurality of different illumination control devices. A plurality of different signal receiving units corresponding to the dimming signal, which are capable of receiving a plurality of different dimming signals, and the signal receiving unit receiving the different dimming signals The dimming of the product of the maximum dimming level based on the dimming signals different from each other and the dimming level for maintaining the initial luminous flux level of the lighting fixture for dimming based on the luminous flux level control information It is characterized by lighting at level.

  In the illumination system of the invention according to claim 8, in the illumination system according to any one of claims 1 to 7, the dimming lighting fixture is a selection for invalidating the dimming signal It has the means.

  In the illumination system according to the first aspect of the present invention, the illuminance of the surface to be illuminated is controlled to be substantially constant based on at least the first brightness sensor unit and the detection output information of the first brightness sensor unit. A control unit that controls the output of a dimming signal used for the control, and a dimming signal output unit that outputs the dimming signal. Is configured to receive the light beam level control information and the dimming signal, and to output the light beam level control information used to maintain the initial light beam level. An illumination system comprising at least one dimming luminaire having a dimming lighting circuit unit capable of controlling a dimming level of the lamp based on a dimming signal, the dimming illumination When the tool receives the dimming signal from the lighting control device, the dimming level based on the dimming signal and the initial luminous flux level of the dimming lighting fixture based on the luminous flux level control information are maintained. Because it is lit at a dimming level that is the product of the dimming levels, the variation in the luminous flux between the dimming lighting fixtures is corrected, and the illuminance of the illuminated surface such as the desk surface is controlled to be substantially constant. There is an excellent effect that the obtained illumination system can be realized without increasing the number of illumination control devices.

  In the illumination system of the invention according to claim 2, in the illumination system according to claim 1, the luminous flux level control means includes a second brightness sensor unit, and the second brightness sensor unit includes: Since the detection output information is the light beam level control information, the illumination that can control the illuminance of the surface to be illuminated such as the desk surface is substantially constant by correcting variations in the light flux between the dimming lighting fixtures. There is an excellent effect that the system can be realized without increasing the number of lighting control devices.

  In the illumination system of the invention according to claim 3, in the illumination system according to claim 2, the second brightness sensor unit measures brightness, and the lamp maintains an initial luminous flux level. Since the period for performing the correction is longer than the period for performing the correction for the first brightness sensor unit to measure the brightness and control the illuminance of the illuminated surface to be substantially constant, In addition to the effect of the invention of the lighting system according to claim 2, since the light output change period due to the initial illuminance correction of the dimming lighting fixture itself is long, the change affects the constant illuminance control of the lighting control device This produces an excellent effect of enabling the construction of a lighting system that is difficult to generate.

  In the illumination system of the invention according to claim 4, in the illumination system according to claim 1, the luminous flux level control means includes a storage means, and the luminous flux attenuation time change data stored in the storage means is: Since it is the light flux level control information, the illumination system capable of correcting the variation of the light flux between the dimming lighting fixtures and controlling the illuminance of the surface to be illuminated such as the desk surface substantially constant is illumination control. There is an excellent effect that it can be realized without increasing the number of devices.

  In the illumination system of the invention according to claim 5, in the illumination system according to claim 4, the dimming lighting fixture is at least a predetermined dimming level from the lighting control device after a predetermined cumulative lighting time has elapsed. In addition to the effects of the invention of the lighting system according to claim 4, in addition to the effect of the invention of the lighting system, the dimming lighting fixture is externally provided. When the dimming signal is not input from the lamp, it is possible to report the arrival of the lamp life when the initial luminous flux cannot be achieved, and when the dimming signal is input from the outside, the necessary light flux cannot be secured by the lighting control device. Only the arrival of the lamp life is reported, so that an excellent effect that the lamp replacement cycle can be lengthened is obtained.

  In the illumination system of the invention according to claim 6, in the illumination system according to any one of claims 1 to 5, the dimming lighting fixture corresponds to a plurality of different illumination control devices. A plurality of different signal receiving units corresponding to the dimming signal, which are capable of receiving a plurality of different dimming signals, and the signal receiving unit receiving the different dimming signals A dimming of a product of an average value of the dimming levels based on the dimming signals different from each other and a dimming level for maintaining the initial light beam level of the lighting device for dimming based on the light beam level control information In addition to the effects of the invention of the illumination system according to any one of claims 1 to 5, in the illumination system that performs constant illuminance control using a plurality of illumination control devices. Lighting control equipment It exhibits an excellent effect that it is possible to reduce the illuminance unevenness between the target area becomes possible.

  In the illumination system of the invention according to claim 7, in the illumination system according to any one of claims 1 to 5, the dimming lighting fixture corresponds to a plurality of different illumination control devices. A plurality of different signal receiving units corresponding to the dimming signal, which are capable of receiving a plurality of different dimming signals, and the signal receiving unit receiving the different dimming signals The dimming of the product of the maximum dimming level based on the dimming signals different from each other and the dimming level for maintaining the initial luminous flux level of the lighting fixture for dimming based on the luminous flux level control information In addition to the effects of the invention of the lighting system according to any one of claims 1 to 5, outside light is only emitted to one brightness detection area by opening the blinds. Like many incidents Even if, it exhibits the excellent effect that it is possible to obtain illuminance necessary illuminated surface.

  In the illumination system of the invention according to claim 8, in the illumination system according to any one of claims 1 to 7, the dimming lighting fixture is a selection for invalidating the dimming signal In addition to the effects of the invention of the lighting system according to any one of claims 1 to 7, since some of the lighting fixtures for dimming are connected to the lighting device for dimming after the system is installed Even when the lighting control device is out of the control target range, it can be reset for each dimming lighting fixture, and the system can be easily changed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the illumination system of the present invention is not limited to the following embodiments, and various modifications can be made without departing from the scope of the present invention.

[First Embodiment]
A first embodiment of the present invention will be described with reference to FIG. In other words, in the first embodiment of the illumination system of the present invention, the illuminance of the surface to be illuminated is substantially reduced based on at least the first brightness sensor unit 1 and the detection output information of the first brightness sensor unit 1. While including at least one illumination control device 4 including a control unit 2 that controls output of a dimming signal used for constant control and a dimming signal output unit 3 that outputs the dimming signal The lamp 5, the light beam level control means for outputting the light beam level control information used to maintain the initial light beam level, the light beam level control information and the dimming signal are received, and A lighting system comprising at least one dimming lighting fixture 7 having a dimming lighting circuit section 6 capable of controlling the dimming level of the lamp based on the luminous flux level control information and the dimming signal. A Temu, is that the luminaire 7 for multiple dimming lighting control device 4 are connected by a common dimming signal line. Furthermore, the dimming / lighting circuit unit 6 includes a signal receiving unit 8 that receives the dimming signal, a second brightness sensor unit 9, a control unit 10, and a lighting circuit unit 11.

  Hereinafter, the operation of the present illumination system will be described more specifically.

  First, the operation of the illumination control device 4 is as follows.

  [Step 1] A measurement value, which is detection output information of the brightness sensor unit 1, is read by the control unit 2 and compared with a preset target sensor value.

  [Step 2] If the measurement value of the brightness sensor unit 1 is lower than the target sensor value as a result of the comparison calculation in Step 1, the dimming output level is increased by a specified value. On the other hand, when the measured value of the brightness sensor unit 1 exceeds the target sensor value, the dimming output level is lowered by a specified value.

  [Step 3] The dimming output level determined in step 2 is output from the dimming signal output unit 3 as a dimming signal.

  [Step 4] The illumination control device 4 returns to the operation of Step 1 after a predetermined time (feedback control).

  In this case, even if the dimming signal output from the illumination control device 4 is a PWM signal or any digital communication, it can be realized without any problem in the present embodiment.

  Here, it is desirable to perform the control with a period A of several seconds to several tens of seconds as the time required for one operation of Step 1 to Step 3. The reason for this is to shorten the output correction time for external light fluctuations as much as possible without being noticed by the occupants. In addition, it is possible to read the signal of the brightness sensor unit 1 a number of times using the time and perform a comparison operation using an average value.

  On the other hand, the operation of the light control lighting fixture 7 is as follows.

[1] When a dimming signal is not input from the outside [Step 1] A measurement value which is detection output information of the brightness sensor unit 9 is read by the control unit 10 and compared with a preset target sensor value I do.

  Here, as a measurement method of the brightness of the lamp light of the lamp 5 by the brightness sensor unit 9, as shown in FIG. 2A, a measurement hole 13 is formed in the reflector 12 on the back surface of the lamp 5, A method of directly measuring the brightness of the lamp light and, as shown in FIG. 2 (b), a hole is formed in the reflector 12 at a position where an illuminated surface of an illuminated body (not shown) such as a floor or a desk can be measured. 14 is opened and the reflected light from the surface to be illuminated of the lamp output of the lamp 5 is measured. The former is less susceptible to changes in reflectance and external light on the surface to be illuminated, and the latter has the advantage that brightness including reflection plate contamination can be measured.

  Further, the set value of the target sensor value is based on the luminous flux decay curve of the lamp 5 illustrated in FIG. 3A, and the final luminous flux after the luminous flux decay is assumed to be, for example, about 70% of the initial luminous flux. A general method is to set the brightness at the time of dimming output of 70% of the initial luminous flux as the target sensor value when replacing the lamp.

  [Step 2] If the measurement value of the brightness sensor unit 9 is lower than the target sensor value as a result of the comparison calculation in Step 1, the dimming output level is increased by a specified value. On the other hand, when the measured value of the brightness sensor unit 9 exceeds the target sensor value, the dimming output level is lowered by a specified value.

  [Step 3] The controller 10 returns to the operation of Step 1 again after a predetermined time (feedback control).

  Here, as the time required for the entire operation of Step 1 to Step 3, the control is performed in a cycle B of several minutes to several hours. The reason for this is that the luminous flux decay curve of the lamp 5 is very slow with respect to the fluctuation of the outside light, and can be sufficiently corrected with a very slow period with respect to the correction period of the constant illuminance control by the illumination control device. is there. Moreover, it is also possible to expect the effect of not following the change in the reflectance of the detection surface temporarily.

  By repeating the above operation, as the operation of the light control lighting fixture 7, as shown in FIG. 3 (b), the light adjustment is performed as the light beam decreases according to the light beam decrease curve of FIG. 3 (a). The output level is increased, and the luminous flux level can be maintained substantially constant from beginning to end at substantially the same level as the initial luminous flux level.

  Further, in the period (period B) in which the second brightness sensor unit 9 measures the brightness and performs correction for the lamp 5 to maintain the initial luminous flux level, the first brightness sensor unit 1 is bright. The light output change period due to the initial illuminance correction of the dimming lighting fixture 7 by measuring the length and making it longer than the period (period A) for performing correction for controlling the illuminance of the surface to be illuminated to be substantially constant Therefore, it is possible to realize a lighting system configuration in which the change hardly affects the constant illuminance control of the lighting control device 4.

[2] When a dimming signal is input from the outside Steps 1 to 3 are the same as when the dimming signal is not input from the outside.

[Step 4] The control unit 10 reads the dimming level of the dimming signal via the signal receiving unit 8. (Here, it is assumed that a dimming signal having a dimming level of 70% of the maximum dimming level is received.)
[Step 5] Based on the dimming output level A determined by the operations of Steps 1 to 3 and the received dimming level B, the light is lit at the dimming level obtained by the following equation (1) (FIG. 5). 4). That is, in this case, assuming that the light control level A = 70% and the light control level = 70%, the lighting level is 49% [0.7 × 0.7 = 0.49 (49%)].

Dimming level A x Dimming level B = Lighting level (1)

[Step 6] After lighting at the dimming level, feedback control is performed using the measurement value of the brightness sensor unit 9 at that time as a target value.

  By performing the control as described above, in the illumination system that performs constant illuminance control using the illumination control device 4 as shown in FIG. 5, the variation in the luminous flux between the fixtures is corrected, and the surface to be illuminated such as the desk surface is corrected. An illumination system capable of controlling the illuminance substantially constant can be configured without increasing the number of illumination control devices 4.

  That is, in the present embodiment, the detection output information of the second brightness sensor unit 9 is used as the light flux level control information used by the lamp 5 to maintain the initial light flux level, and the second brightness sensor. The unit 9 together with the control unit 10 constitutes the luminous flux level control means.

  Further, when the light control lighting device 7 receives the light control signal from the light control device 4, the light control level based on the light control signal and the detection output information of the brightness sensor unit 9 which is the light beam level control information. The lighting device for lighting control 7 is turned on at the lighting control level of the product of the lighting control levels for maintaining the initial luminous flux level.

  As a result, a variation in the luminous flux between the dimming lighting fixtures 7 is corrected, and an illumination system that can control the illuminance of the illuminated surface such as the desk surface substantially constant without increasing the number of illumination control devices 4 is realized. It becomes possible.

[Second Embodiment]
A second embodiment of the present invention will be described. That is, the second embodiment of the illumination system of the present invention has basically the same configuration as the first embodiment as shown in FIG. 6, but the dimming lighting of the dimming lighting fixture 7 The circuit unit 6 includes a switch unit 15 serving as a selection unit for invalidating the dimming signal, in addition to the signal receiving unit 8, the brightness sensor unit 9, the control unit 10, and the lighting circuit unit 11, and lighting. As a system, a plurality of lighting fixtures 7 for dimming are connected to the lighting control device 4 through a common dimming signal line. In this case, the operation of the illumination control device 4 is the same as that in the first embodiment.

  On the other hand, the operation of the light control lighting fixture 7 is as follows.

[1] When a dimming signal is not input from the outside, or when the switch unit 15 is ON [Step 1] A measurement value that is detection output information of the brightness sensor unit 9 is obtained by the control unit 10. Read and compare with a preset target sensor value.

  Here, the measurement method of the brightness of the lamp light of the lamp 5 by the brightness sensor unit 9 is the same as in the case of the first embodiment.

  [Step 2] If the measurement value of the brightness sensor unit 9 is lower than the target sensor value as a result of the comparison calculation in Step 1, the dimming output level is increased by a specified value. On the other hand, when the measured value of the brightness sensor unit 9 exceeds the target sensor value, the dimming output level is lowered by a specified value.

  [Step 3] The controller 10 returns to the operation of Step 1 again after a predetermined time (feedback control).

  By repeating the above operations, the dimming output level increases as the luminous flux decreases, as shown in FIG. 3B, as the operation of the dimming lighting fixture 7, so that the initial luminous flux at the beginning of lamp replacement It is possible to maintain the level.

[2] When the switch unit 15 is OFF and a dimming signal is input from the outside For Steps 1 to 3, when the dimming signal is not input from the outside, or This is the same as when the switch unit 15 is ON.

[Step 4] The control unit 10 reads the dimming level of the dimming signal via the signal receiving unit 8. (Here, it is assumed that a dimming signal having a dimming level of 70% of the maximum dimming level is received.)
[Step 5] Based on the dimming output level A determined by the operations of Steps 1 to 3 and the received dimming level B, the light is lit at the dimming level obtained by the following equation (1) (FIG. 5). 4). That is, in this case, assuming that the light control level A = 70% and the light control level = 70%, the lighting level is 49% [0.7 × 0.7 = 0.49 (49%)].

Dimming level A x Dimming level B = Lighting level (1)

[Step 6] After lighting at the dimming level, feedback control is performed using the measurement value of the brightness sensor unit 9 at that time as a target value.

  As described above, in the lighting system of the present embodiment, the dimming lighting fixture 7 includes the switch unit 15 that is a selection unit for invalidating the dimming signal, and thus performs the above-described control. Thus, even when a part of the dimming lighting fixtures 7 is removed from the control target range of the lighting control device 4 of the dimming lighting fixture after the system is installed, it can be reset for each dimming lighting fixture. Therefore, the system can be easily changed.

[Third Embodiment]
A third embodiment of the present invention will be described. That is, in the third embodiment of the illumination system of the present invention, as shown in FIG. 7, the dimming lighting circuit unit 6 of the dimming lighting fixture 7 includes a signal receiving unit 8, a control unit 10, and a lighting circuit unit. In addition to 11, the storage means 16 is provided, and the lighting system includes a plurality of dimming lighting fixtures 7 connected to the lighting control device 4 through a common dimming signal line. In this case, the operation of the illumination control device 4 is the same as that in the first embodiment.

  On the other hand, the operation of the light control lighting fixture 7 is as follows.

[1] When a dimming signal is not input from the outside [Step 1] At the time of lamp replacement, the control unit 10 lights the lamp 5 at the initial dimming output level and counts the cumulative lighting time. (The count value is stored in the storage means 16 at regular intervals)
Here, in the case of a straight tube fluorescent lamp, the initial output level is assumed to be about 70% (maintenance rate 0.7) of the initial luminous flux ratio after the luminous flux declines as shown in FIG. The dimming output level is about 70% in many cases.

  [Step 2] The control unit 10 gradually increases the dimming output level every time the cumulative lighting time reaches a certain time.

  Here, as a condition for the dimming output level change at regular time intervals, as shown in FIG. 3 (a), assuming a luminous flux decay curve in advance, the data is set in the storage means 16 in advance, and the value The dimming output level is determined based on the above.

  By repeating the above operations, the dimming output level increases as the luminous flux decreases, as shown in FIG. 3B, as the operation of the dimming lighting fixture 7, so that the initial luminous flux level at the beginning of lamp replacement Can be maintained.

[2] When a dimming signal is input from the outside Steps 1 and 2 are the same as when the dimming signal is not input from the outside.

[Step 3] The control unit 10 reads the dimming level of the dimming signal via the signal receiving unit 8. (Here, it is assumed that a dimming signal having a dimming level of 100% of the maximum dimming level is received.)
[Step 4] Based on the dimming output level A determined by the operations of Step 1 and Step 2 and the received dimming level B, the light is lit at the dimming level obtained by the following formula (1) ( (See FIG. 4). That is, in this case, assuming a light control level A = 60% and a light control level = 100%, the lighting level is 60% [0.6 × 1.0 = 0.60 (60%)].

Dimming level A x Dimming level B = Lighting level (1)

[Step 5] Even after lighting at the dimming level, the time count of the cumulative lighting time continues. If the value of the dimming level A changes after the predetermined time has elapsed, the calculation of step 4 is performed again to set the dimming output level. change.

  By performing the control as described above, in the illumination system that performs constant illuminance control using the illumination control device 4 as shown in FIG. 5, the variation in the luminous flux between the fixtures is corrected, and the surface to be illuminated such as the desk surface is corrected. An illumination system capable of controlling the illuminance substantially constant can be configured without increasing the number of illumination control devices 4.

  In other words, in the present embodiment, the time-varying data of the luminous flux attenuation meter (the luminous flux decay curve data of the lamp 5) stored in the storage means 16 is used for the lamp 5 to maintain the initial luminous flux level at the beginning of lamp replacement. Used as light beam level control information, the storage means 16 together with the controller 10 constitutes the light beam level control means.

  Further, when the light control lighting device 7 receives the light control signal from the lighting control device 4, the light control level based on the light control signal and the luminous flux attenuator time stored in the storage means 16 which is the light beam level control information. The light is lit at a dimming level that is the product of the dimming levels for maintaining the initial luminous flux level at the beginning of lamp replacement of the dimming lighting fixture 7 based on the change data.

  As a result, a variation in the luminous flux between the dimming lighting fixtures 7 is corrected, and an illumination system that can control the illuminance of the illuminated surface such as the desk surface substantially constant without increasing the number of illumination control devices 4 is realized. It becomes possible.

[Fourth Embodiment]
A fourth embodiment of the present invention will be described. That is, in the fourth embodiment of the lighting system of the present invention, as shown in FIG. 8, the dimming lighting circuit unit 6 of the dimming lighting fixture 7 includes a signal receiving unit 8, a control unit 10, and a lighting circuit unit. In addition to 11, the storage unit 16 and the LED unit 17 are provided, and the lighting system is configured such that a plurality of lighting fixtures 7 for dimming are connected to the lighting control device 4 through a common dimming signal line.

  Hereinafter, the operation of the present illumination system will be described more specifically.

  First, the operation of the illumination control device 4 is as follows.

<1> Operation at the time of target setting The dimming control is performed on the connected dimming luminaire in the absence of outside light at night, and the target value is stored when the target illuminance is reached. At the time of this storing operation, a special dimming signal level is transmitted to transmit the storing operation also to the dimming lighting fixture 7. (For example, a PWM signal with a duty ratio of 100% that is not used in normal dimming control)
<2> Normal Operation In this case, the operation is the same as that in the first embodiment.

  On the other hand, the operation of the light control lighting fixture 7 is as follows.

[1] Operation when a stored signal is received from the illumination control device 4 The dimming level immediately before receiving the stored signal is stored as the stored dimming level.

[2] When a dimming signal is not input from the outside [Step 1] The controller 10 lights the lamp 5 at the initial dimming output level at the time of lamp replacement, and counts the cumulative lighting time. (The count value is stored in the storage means 16 at regular intervals)
Here, in the case of a straight tube fluorescent lamp, the initial output level is assumed to be about 70% (maintenance rate 0.7) of the initial luminous flux ratio after the luminous flux declines as shown in FIG. The dimming output level is about 70% in many cases.

  [Step 2] The control unit 10 gradually increases the dimming output level every time the cumulative lighting time reaches a certain time.

  Here, as a condition for the dimming output level change at regular time intervals, as shown in FIG. 3 (a), assuming a luminous flux decay curve in advance, the data is set in the storage means 16 in advance, and the value The dimming output level is determined based on the above.

  By repeating the above operations, the dimming output level increases as the luminous flux decreases, as shown in FIG. 3B, as the operation of the dimming lighting fixture 7, so that the initial luminous flux level at the beginning of lamp replacement Can be maintained.

[3] When a dimming signal is input from the outside Steps 1 and 2 are the same as when the dimming signal is not input from the outside.

[Step 3] The control unit 10 reads the dimming level of the dimming signal via the signal receiving unit 8. (Here, it is assumed that a dimming signal having a dimming level of 70% of the maximum dimming level is received.)
[Step 4] Based on the dimming output level A determined by the operations of Steps 1 and 2 and the received dimming level B, the light is lit at the dimming level obtained by the following equation (1). That is, in this case, assuming that the light control level A = 70% and the light control level = 70%, the lighting level is 49% [0.7 × 0.7 = 0.49 (49%)].

Dimming level A x Dimming level B = Lighting level (1)

Here, when the dimming level A is 100% and the external dimming level B is larger than the stored dimming level, the control unit 10 turns on the LED unit 17 and uses the arrival of the lamp life. Tell the person.

  By performing the control as described above, if a dimming signal is not input to the dimming lighting fixture 7 from the outside, it is possible to report the arrival of the lamp life when the luminous flux at the beginning of lamp replacement cannot be achieved, and to adjust from the outside. When an optical signal is input, the arrival of the lamp life is reported only when the necessary light flux cannot be secured by the illumination control device 4, so that the lamp replacement cycle can be lengthened.

  As described above, in the lighting system of the present embodiment, when the dimming lighting fixture 7 receives a signal of a predetermined dimming level or higher from the lighting control device 4 after the elapse of the predetermined cumulative lighting time, the lamp life is reduced. Since it has the LED part 17 which is a lamp life report means for reporting the arrival, if a dimming signal is not input to the dimming lighting fixture 4 from the outside, the lamp life will be reached if the initial luminous flux cannot be achieved. When a notification can be made and a dimming signal is inputted from the outside, the arrival of the lamp life is notified only when the necessary light flux cannot be secured by the illumination control device 4, so that the lamp replacement cycle can be lengthened. .

[Fifth Embodiment]
A fifth embodiment of the present invention will be described. That is, in the fifth embodiment of the lighting system of the present invention, as shown in FIG. 9, a plurality of dimming lighting fixtures 7 and 7a are connected to the lighting control devices 4 and 4a by a common dimming signal line. Yes. Moreover, some lighting fixtures 7a for light control are connected with the two illumination control apparatuses 4 and 4a.

  The illumination control devices 4 and 4 a have the same configuration, and include a brightness sensor unit 1, a control unit 2, and a dimming signal output unit 3, and the dimming lighting fixture 7 a includes a lamp 5, A dimming / lighting circuit section 6 having two signal receiving sections 8 and 8a, a control section 10, a brightness sensor section 9 and a lighting circuit section 11 is provided.

  First, the operation of the illumination control devices 4 and 4a is as follows.

  [Step 1] A measurement value, which is detection output information of the brightness sensor unit 1, is read by the control unit 2 and compared with a preset target sensor value.

  [Step 2] If the measurement value of the brightness sensor unit 1 is lower than the target sensor value as a result of the comparison calculation in Step 1, the dimming output level is increased by a specified value. On the other hand, when the measured value of the brightness sensor unit 1 exceeds the target sensor value, the dimming output level is lowered by a specified value.

  [Step 3] The dimming output level determined in step 2 is output from the dimming signal output unit 3 as a dimming signal.

[Step 4] The illumination control device 4 returns to the operation of Step 1 after a predetermined time. (Feedback control)
With the above operation, the illumination control devices 4 and 4a output different dimming signal levels depending on the measurement values of the respective brightness sensor units 1 (there may be the same dimming signal level).

  On the other hand, the operation of the dimming lighting fixtures 7 and 7a is as follows.

[1] When a dimming signal is not input from the outside A dimming output level A for correcting the initial illuminance is determined by the same operation as in the first embodiment.

[2] When a dimming signal is input to one of the signal receiving units 8 and 8a from the outside The dimming output level is determined by the same operation as in the first embodiment. (It is assumed that the received dimming signal is B, and here, a dimming signal having a dimming level of 70% of the maximum dimming level is received.)
Based on the dimming output level A and the received dimming level B, the light is lit at the dimming level obtained by the following equation (1) (see FIG. 4). That is, in this case, assuming that the light control level A = 70% and the light control level = 70%, the lighting level is 49% [0.7 × 0.7 = 0.49 (49%)].

Dimming level A x Dimming level B = Lighting level (1)

[2] When a dimming signal is input to both the signal receiving units 8 and 8a from the outside When a dimming signal is input to both the signal receiving units 8 and 8a from the outside (30% and 70%) Assumption)
The received dimming signals are B1 and B2, and here, B1 = 30% [suppose that a dimming signal having a dimming level of 30% of the maximum dimming level is received. ], B2 = 70%.

  [Step 1] The control unit 10 reads the dimming level of each dimming signal via the signal receiving units 8 and 8a.

[Step 2] Based on the dimming output level A determined by the above operation and the received dimming levels B1 and B2, the lighting is performed at the dimming level obtained by the following equation (2). That is, in this case, assuming a light control level A = 70%, a light control level B1 = 30%, and a light control level B2 = 70%, the lighting level is 35% [0.7 × ((0.3 + 0 .7) / 2) = 0.35 (35%)].

Dimming level A × ((Dimming level B1 + Dimming level B2) / 2) = Lighting level (2)

By performing the control as described above, it is possible to reduce the illuminance unevenness between the illumination control devices 4 as much as possible in the illumination system that performs constant illumination control using a plurality of illumination control devices 4 as shown in FIG. It becomes.

  In the lighting system according to the present embodiment, the dimming lighting device 7a can receive a plurality of different dimming signals corresponding to a plurality of different lighting control devices 4. This corresponds to the case of having two different signal receiving units 8 and 8a corresponding to each other. However, the number of signal receiving units included in the dimming lighting fixture in the present invention is not limited to this. Of course, it may be a dimming lighting fixture having three or more different signal receivers.

  As described above, in the lighting system according to the present embodiment, the dimming lighting fixture can receive a plurality of different dimming signals corresponding to a plurality of different lighting control devices. A plurality of different signal receiving units corresponding to each other, and when receiving the dimming signals different from each other in the signal receiving unit, an average value of dimming levels based on the dimming signals different from each other, A plurality of lighting control devices are used because the lighting is performed at the dimming level of the product of the dimming levels for maintaining the initial luminous flux level at the beginning of lamp replacement of the dimming lighting fixture based on the luminous flux level control information. In an illumination system that performs constant illuminance control, it is possible to reduce illuminance unevenness between target areas of the illumination control device.

[Sixth Embodiment]
A sixth embodiment of the present invention will be described. That is, the basic configuration of the sixth embodiment of the illumination system of the present invention is the same as that of the fifth embodiment, and is shown in FIG. In this case, the operation of the illumination control devices 4 and 4a is the same as that in the fifth embodiment.

  On the other hand, the operation of the dimming lighting fixtures 7 and 7a is as follows.

[1] When a dimming signal is not input from the outside The operation is the same as in the case of the fifth embodiment.

[2] When a dimming signal is input to either one of the signal receiving units 8 and 8a from the outside The operation is the same as in the case of the fifth embodiment.

[2] When a dimming signal is input to both the signal receiving units 8 and 8a from the outside When a dimming signal is input to both the signal receiving units 8 and 8a from the outside (30% and 70%) Assumption)
The received dimming signals are B1 and B2, and here, B1 = 30% [suppose that a dimming signal having a dimming level of 30% of the maximum dimming level is received. ], B2 = 70%.

  [Step 1] The control unit 10 reads the dimming level of each dimming signal via the signal receiving units 8 and 8a.

  [Step 2] The controller 10 determines the higher dimming level of the read dimming levels B1 and B2.

[Step 3] Based on the dimming output level A determined when the dimming signal is not input from the outside and the received dimming levels B1 and B2, the following formula (3) was obtained. Lights at dimming level. That is, in this case, assuming a light control level A = 70%, a light control level B1 = 30%, and a light control level B2 = 70%, the lighting level is 49% [0.7 × (0.7) = 0.49 (49%)].

Light control level A × (the higher of light control level B1 and light control level B2) = lighting level (3)

By performing the control as described above, in a lighting system that performs constant illuminance control using a plurality of lighting control devices 4 as shown in FIG. 11, outside light is emitted only in one brightness detection area due to blind opening or the like. Even when a large amount of light is incident, the required illumination intensity of the surface to be illuminated can be obtained.

  In the lighting system according to the present embodiment, the dimming lighting device 7a can receive a plurality of different dimming signals corresponding to a plurality of different lighting control devices 4. This corresponds to the case of having two different signal receiving units 8 and 8a corresponding to each other. However, the number of signal receiving units included in the dimming lighting fixture in the present invention is not limited to this. Of course, it may be a dimming lighting fixture having three or more different signal receivers.

  As described above, in the lighting system according to the present embodiment, the dimming lighting fixture can receive a plurality of different dimming signals corresponding to a plurality of different lighting control devices. A plurality of different signal receiving units corresponding to each other, and when the signal receiving unit receives the different dimming signals, the maximum value of the dimming level based on the different dimming signals; Since lighting is performed at the dimming level of the product of the dimming level for maintaining the initial luminous flux level at the beginning of lamp replacement of the dimming lighting fixture based on the luminous flux level control information, one of the lighting fixtures can be opened by blind opening etc. Even when a large amount of external light is incident only on the brightness detection area, the required illuminance on the surface to be illuminated can be obtained.

It is a block diagram which shows the outline of a structure of 1st Embodiment of the illumination system of this invention. It is a figure which illustrates the measurement method of the brightness of the lamp light of the lamp 5 by the brightness sensor part 9 of 1st Embodiment of the illumination system of this invention, (a) is measured to the reflecting plate 12 of the back of the lamp 5. FIG. (B) is a method of directly measuring the brightness of the lamp light, and (b) forming a hole 14 in the reflector 12 at a position where an illuminated body (not shown) can be measured. This is a method of measuring the reflected light from the surface to be illuminated. FIG. 2 shows a relationship between a change in luminous flux with time and a dimming output in the illumination system of the present invention, in which (a) is a diagram illustrating a luminous flux decay curve of the lamp 5, and (b) is a luminous flux decay curve of (a). It is a figure which shows the case where the light control output level is increased with the following light beam decline, and the light beam level is maintained substantially constant from beginning to end at substantially the same level as the initial light beam level. In the illumination system of this invention, it is a figure which shows the relationship between the light control level based on the control information which the lamp 5 can maintain the initial light beam level at the time of lamp replacement | exchange, and the light control level based on the light control signal from the illumination control apparatus 4. is there. It is a figure which shows an example of the illumination distribution at the time of illumination control in 1st Embodiment of the illumination system of this invention. It is a block diagram which shows the outline of a structure of 2nd Embodiment of the illumination system of this invention. It is a block diagram which shows the outline of a structure of 3rd Embodiment of the illumination system of this invention. It is a block diagram which shows the outline of a structure of 4th Embodiment of the illumination system of this invention. It is a block diagram which shows the outline of a structure of 5th and 6th embodiment of the illumination system of this invention. It is a figure which shows an example of the illumination intensity distribution at the time of illumination intensity control in 5th Embodiment of the illumination system of this invention. It is a figure which shows an example of the illumination intensity distribution at the time of illumination intensity control in 6th Embodiment of the illumination system of this invention. It is a block diagram which shows the outline of a structure of the illumination system which concerns on a prior art example. It is a figure which shows one example of the illumination distribution at the time of illumination control of the illumination system which concerns on a prior art example. It is a figure which shows one example different from the above of the illumination intensity distribution at the time of illumination intensity control of the illumination system which concerns on a prior art example. It is a figure which shows one example further different from the above of the illumination intensity distribution at the time of illumination intensity control of the illumination system which concerns on a prior art example.

Explanation of symbols

1 1st brightness sensor part (lighting control device 4)
2 Control unit (lighting control device 4)
3 Light control signal output unit (lighting control device 4)
4 Illumination control device 4a Illumination control device 5 Lamp (Lighting fixture 7)
6 Dimming lighting circuit part (Lighting fixture 7)
7 Dimming lighting fixtures 7a Dimming lighting fixtures 8 Signal receiver (dimming lighting circuit 6)
8a Signal receiver (dimming lighting circuit 6)
9 Second brightness sensor section (dimming lighting circuit section 6)
10 Control part (dimming lighting circuit part 6)
11 lighting circuit part (dimming lighting circuit part 6)
12 Reflector (Lighting fixture 7)
13 holes (reflector 12)
14 holes (reflector 12)
15 Switch part (dimming lighting circuit part 6)
16 Storage means (dimming lighting circuit 6)
17 LED part

Claims (8)

  Control for controlling the output of a dimming signal used to control the illuminance of the illuminated surface to be substantially constant based on at least the first brightness sensor unit and detection output information of the first brightness sensor unit Unit and a dimming signal output unit that outputs the dimming signal, and at least one illumination control device including the lamp, and a luminous flux level control that the lamp uses to maintain the initial luminous flux level A luminous flux level control means for outputting information; and the luminous flux level control information and the dimming signal are formed so as to be received; and based on the luminous flux level control information and the dimming signal, the dimming level of the lamp is determined. An illumination system comprising at least one dimming lighting fixture having a dimming lighting circuit section that can be controlled, wherein the dimming lighting fixture receives the dimming signal from the lighting control device. In this case, the light is turned on at a dimming level that is the product of the dimming level based on the dimming signal and the dimming level for maintaining the initial luminous flux level of the lighting fixture for dimming based on the luminous flux level control information. A lighting system characterized by that.   2. The illumination according to claim 1, wherein the luminous flux level control means includes a second brightness sensor unit, and detection output information of the second brightness sensor unit is the luminous flux level control information. system.   The period when the second brightness sensor unit measures brightness and performs correction for maintaining the initial luminous flux level of the lamp is measured by the first brightness sensor unit. The illumination system according to claim 2, wherein the period is longer than a period of performing correction for controlling the illuminance of the illumination surface to be substantially constant.   2. The illumination system according to claim 1, wherein the luminous flux level control means includes a storage means, and the luminous flux attenuation time change data stored in the storage means is the luminous flux level control information.   The dimming lighting fixture has lamp life reporting means for reporting the arrival of a lamp life when a signal having a predetermined dimming level or higher is received from the lighting control device after a predetermined cumulative lighting time has elapsed. The illumination system according to claim 4, characterized in that:   A plurality of different signal receiving units corresponding to the dimming signal, wherein the dimming lighting fixture can receive the plurality of different dimming signals corresponding to the plurality of different lighting control devices. And when the signal receiving unit receives the dimming signals different from each other, the dimming level based on the dimming signals different from each other and the dimming level based on the luminous flux level control information The lighting system according to any one of claims 1 to 5, wherein the lighting system is turned on at a dimming level of a product of dimming levels for maintaining an initial luminous flux level of the lighting fixture.   A plurality of different signal receiving units corresponding to the dimming signal, wherein the dimming lighting fixture can receive the plurality of different dimming signals corresponding to the plurality of different lighting control devices. And when the signal receiving unit receives the dimming signals different from each other, the dimming level based on the dimming signals different from each other and the dimming level based on the luminous flux level control information. The lighting system according to any one of claims 1 to 5, wherein the lighting system is turned on at a dimming level of a product of dimming levels for maintaining an initial luminous flux level of the lighting fixture. The lighting system according to any one of claims 1 to 7, wherein the dimming lighting fixture includes a selection unit for invalidating the dimming signal.

Images