JP2008140594A - Illumination control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an illumination control device in which respective illumination systems are controlled according to an established target illumination intensity without arranging numerous illumination intensity sensors, and which is arranged so that no unnatural impression is given due to light and shade of the respective illumination fixtures on the ceiling face even when the illumination intensity on a floor face or desktop face is held constant. <P>SOLUTION: The device is equipped with the main illumination system 1 composed of one or more illumination fixtures, the illumination intensity sensor 7 that detects illumination intensity in an illumination region by the main illumination system, an illumination intensity configuring means by which a target illumination intensity of the illumination region is configured, the main dimming means in which a dimming level of the main illumination system is controlled according to the target illumination intensity and the illumination intensity detected by the illumination intensity sensor, subsidiary illumination systems 2, 3 composed of one or more illumination fixtures, and a subsidiary dimming means 4a in which weighting on the dimming level of the main illumination system is configured depending on the target illumination intensity, the dimming level of the main illumination system, and the illumination intensity detected by the illumination intensity sensor, and by this weighting, the dimming level of the subsidiary illumination system is controlled. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an illumination control device that controls the dimming degree so that the illuminance of an irradiation surface of an illumination system becomes a target illuminance.

  Conventionally, the illuminance sensor attached to the ceiling surface detects the reflected light from the floor surface, wall surface, and desk surface of light emitted from the illuminating device or outside light (for example, sunlight incident from a window). There is an illumination control device that controls the light output so that the illuminance on the floor surface or the desk is kept constant by dimming control of the illumination device according to the detected reflected light.

  In such an illumination control device, for example, there is an illumination control device in which an illumination sensor is provided for each of a plurality of illumination systems, and the illumination intensity detected by each illumination sensor is controlled to be substantially constant (for example, Patent Documents). 1).

Also, a method is known in which an illuminance sensor is provided for each of a plurality of illumination systems, and dimming control is performed so as to achieve a target illuminance set for each illumination system (see, for example, Patent Document 2).
JP 2000-133471 A JP 2006-185736 A

  However, in such a conventional illumination control device, an illuminance sensor is required according to the illumination system, so the cost increases, and the illuminance on the floor, wall, and desk surface can be controlled to be constant. In addition, adjustment of the relative dimming degree between the lighting systems is not taken into consideration, and light and darkness are alternately formed in the lighting fixtures installed on the ceiling surface due to the influence of illumination light from other lighting systems such as outside light It sometimes gave an unnatural impression.

  The present invention has been made in view of such circumstances, and controls each illumination system in accordance with the set target illuminance without arranging a large number of illuminance sensors, and the illuminance on the floor surface or the desk surface. It is an object of the present invention to provide a lighting control device that does not give an unnatural impression due to the brightness of each lighting fixture on the ceiling surface even when it is constant.

  The illumination control device of the present invention includes a main illumination system composed of one or more luminaires; an illuminance sensor that detects the illuminance of the illumination area by the main illumination system; and an illuminance setting means that sets a target illuminance of the illumination area;

  Main dimming means for controlling the dimming degree of the main illumination system according to the target illuminance and the illuminance detected by the illuminance sensor; a sub-illumination system comprising one or more luminaires; and a weighting for the dimming degree of the main illumination system Is set according to the target illuminance, the dimming degree of the main illumination system, and the illuminance detected by the illuminance sensor, and sub-dimming means for controlling the dimming degree of the sub-illumination system by this weighting.

  In the present invention, the definitions and technical meanings of terms are as follows.

  The main lighting system is a series that includes one or more lighting fixtures including a lamp, a lighting circuit, a reflector, and the like, and performs lighting dimming control on a plurality of lighting fixtures under the same conditions. Moreover, the main illumination system has at least one illuminance sensor, and is arranged so that the illuminance of the illumination area by the main illumination system can be detected.

  When the main lighting system is installed near the window, the intensity of outside light depends on the time of day and the weather.Therefore, the illuminance sensor is installed near the ceiling surface near the window where the reflected light of outside light can be captured reliably. It is preferable.

  The illuminance setting means includes, for example, a receiving unit capable of receiving a signal from a setting device that can input and output the target illuminance, and the signal received by the receiving unit can be stored in the storage means. The illuminance setting means is provided on the main dimming means, the illuminance sensor, the luminaire of the main illumination system, the wall switch, the ceiling surface, etc., and can be formed to communicate with the setting device wirelessly or by wire. Further, it may be configured to be connected to a network wirelessly or by wire and set the set illuminance from a general-purpose device such as a personal computer.

  The target illuminance set by the illuminance setting means is the illuminance of the illumination area of the main illumination system.

  The main dimming means is dimmed and controlled so that the illuminance detected by the illuminance sensor becomes the target illuminance set by the illuminance setting means.

  The sub-lighting system is a series in which one or more lighting fixtures composed of a lamp, a lighting circuit, a reflector, and the like are lit and dimmed under the same conditions, and the dimming level for each sub-lighting system is the dimming level of the main lighting system. Is controlled by the sub-dimming means by weighting.

  The weighting of the sub-illumination system is a ratio of the dimming degree of the sub-illuminating system to the dimming degree of the main lighting system, and is determined so that the illuminance on the floor surface, the desk surface, and the wall surface becomes a set value. For example, the illuminance of the floor surface of the entire illumination area may be set to be constant, or the illuminance of the floor surface of a certain illumination area may be set higher or lower than the other illumination areas. That is, when there are a plurality of sub illumination systems, dimming control can be performed with different weights.

  The weighting is determined by the target illuminance, the dimming degree of the main illumination system, and the illuminance detected by the illuminance sensor. Simulation based on parameters required to determine the illuminance distribution such as the size of the room, the light distribution of the luminaire, the illuminance at each dimming degree obtained by the luminaire, the installation position, the target illuminance, and the illuminance detected by the illuminance sensor It may be determined based on the result obtained by the above. The illuminance detected by the illuminance sensor includes illuminance due to external light. Further, the weighting may be determined so as to obtain a desired illuminance distribution while the lighting fixture is actually turned on. In this case, the determined weighting is stored in the storage means, and the light control can be performed according to the weight stored in the storage means in the actual lighting control. This storage means may be the same as the storage means for storing the target illuminance.

  The dimming range is possible from the maximum value 100 (%) to the minimum value 0 (%) of the dimming degree of the lighting fixture, but the setting range may be different depending on the light source of the illumination lamp used. For example, when a fluorescent lamp is used as the light source, a dimming degree in the range of 80 to 30 (%) where dimming can be most significantly controlled is suitable. When an LED is used as the light source, the dimming degree is 100 to 0 (%). It is possible to control within the range.

  The illumination control device of the present invention is characterized in that the main illumination system is provided closest to the window.

  For example, when the main illumination system is installed near a window, the illuminance set at day and night may be different if the weighting of the sub-illumination system is determined without considering outside light. Thus, when the external light changes during lighting, the weighting can be corrected in consideration of light other than each illumination system.

  According to the illumination control device of the present invention, it is not necessary to install an illuminance sensor for each illumination system, and even if the number of sub-illumination systems is increased, it is not necessary to increase the number of illuminance sensors. Further, since the sub-illumination system is controlled by weighting the dimming degree of the main illumination system, the dimming control of the entire lighting control device can be easily performed.

  According to the illumination control device according to the present invention, dimming control of each illumination system can be performed in response to a change in external light.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The configuration of the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram illustrating a configuration of a lighting control device, and FIG. 2 is a diagram illustrating an example when the lighting control device of FIG. 1 is arranged on a floor.

  As shown in FIG. 1, the lighting control device L of the present invention includes, for example, a main lighting system 1 including lighting fixtures 1a, 1b, and 1c, and lighting fixtures 2a, 2b, It consists of a sub-illumination system 2 composed of 2c and a sub-illumination system 3 composed of lighting fixtures 3a, 3b, 3c. The lighting fixtures 1a, 1b, 1c, 2a, 2b, 2c, 3a, 3b, and 3c are composed of a single lighting fixture or a plurality of lighting fixtures, and an AC power source is connected to each lighting system. ing.

  The lighting fixtures of the main lighting system 1 and the sub lighting systems 2 and 3 are controlled by the main dimming means 4a and the sub dimming means 4b and 4c, respectively. Done through.

  Further, the control unit 4d includes an illuminance setting means 5 capable of setting the target illuminance on the floor surface of the illumination area by the main illumination system 1 and the sub illumination systems 2 and 3, and a storage means 6 capable of storing the set illuminance set by the illuminance setting means 5. It is connected to the. The illuminance setting means 5 has a wireless function, and can set the set illuminance using a setting device (not shown).

  In the storage means 6, weighting of the dimming degree of the sub-illumination systems 2 and 3 with respect to the dimming degree of the main lighting system 1 is set in advance.

  The control unit 4 d is connected to the illuminance sensor 7 that detects the illuminance of the illumination area by the main illumination system 1, and can receive the illuminance information signal detected by the illuminance sensor 7.

  The weighting is stored in correspondence with the target illuminance, the dimming degree of the main illumination system 1, the illuminance by each illumination system, and the illuminance by light other than the emitted light by the illumination control device L detected by the illuminance sensor 7.

  The illuminance by light other than the emitted light by the illumination control device L can be detected by the illuminance sensor 7 when the illumination control device L is turned off, for example.

  The control unit 4d and the storage unit 6 are housed in one housing and configured as a control device 8.

  The dimming unit 4 performs the same dimming control on the dimming degree of the main lighting system 1, the sub-illuminating system 2, and the sub-illuminating system 3 for each lighting system.

  The control device 8 is connected to a power line (not shown) and is supplied with power, and each luminaire can be turned on by a wall switch 9 connected by the light control means 4 and the signal transmission line. Here, the case where the main illumination system 1 and the sub illumination systems 2 and 3 are turned on by the wall switch 9 as one group will be described.

  FIG. 2 is a diagram showing an example when the lighting control device having the configuration of FIG. 1 is arranged on the floor. The main lighting system 1 is dimmed and controlled under the same conditions with the window side portion of the floor, the sub-lighting system 2 as the lighting area in the center portion of the floor, and the sub-lighting system 3 as the hall area.

  An illuminance sensor 7 is provided in the vicinity of the main illumination system 1, and the illuminance sensor 7 detects the illuminance of reflected light from the floor surface of the illumination area of the main illumination system 1. The reflected light is mainly radiated light and external light from each luminaire of the main illumination system 1, but also includes radiated light from each luminaire of the sub-illumination system 2 and the sub-illumination system 3.

  The control device 8 is disposed on the wall surface and is connected to the illuminance setting means 5 and the illuminance sensor 7 installed on the ceiling surface.

  Next, dimming control of the illumination control device L will be described.

  First, when the wall switch 9 is turned on, the main illumination system 1 is turned on with the dimming degree based on the target illuminance set in the storage means 6 to illuminate the illumination area. And the illumination intensity sensor 7 detects the illumination intensity of this area | region, and transmits the detected illumination intensity information signal to the control part 4d. The control unit 4d reads the corresponding weighting from the storage unit 6 based on the received illuminance information, and turns on the sub-illumination systems 2 and 3 according to this weighting.

  At this time, the signal from the illuminance sensor 7 is always transmitted, and the control unit 4d adjusts the dimming degree of the main illumination system 1 until the target illuminance set in the storage unit 6 and the detected illuminance match. The sub-lighting systems 2 and 3 are controlled while maintaining a constant weight according to the change in the dimming degree of the main lighting system 1.

  Then, when the target illuminance matches the detected illuminance, the change in the dimming degree is stopped and a stable state is obtained.

  Next, the weighting correspondence will be described.

  For example, it is assumed that each illumination system is turned off and the illuminance distribution of the illumination area is determined only by the external light emitted from the window. The stronger the outside light is, the more the light is emitted into the room, and the weaker the light, the light is irradiated only to the floor near the window. By utilizing the relationship between the illumination intensity of the external light and the illumination area of each illumination system, the floor illumination by the external light of the secondary illumination systems 2 and 3 is detected by detecting the floor illumination of the illumination area of the main illumination system 1. Can also be estimated to some extent. For example, in this situation, when the floor illumination of the main illumination system 1 is 200 lx, the sub illumination systems 2 and 3 have a floor illumination of 100 lx and 50 lx, and the floor illumination of the main illumination system 1 is 100 lx. When the floor illuminations of 2 and 3 are 20 lx and 4 lx, and the floor illumination of the main illumination system 1 is 400 lx, the floor illuminations of the sub-illumination systems 2 and 3 can be uniquely determined as 300 lx and 200 lx. In this way, the ratio of the floor illuminations of the sub-illumination systems 2 and 3 to the floor illumination of the main illumination system 1 when only external light is irradiated can be determined. Corresponding to this, a combination of weights in which the floor illumination of the entire illumination area becomes constant by lighting the dimming degree of the main lighting system 1 and the dimming degree of the sub-illumination systems 2 and 3 with appropriate values. it can. That is, by storing the correspondence between the floor surface illuminance of the illumination area of the main illumination system 1 due to external light and the weighting in the storage means 6, the floor surface illuminance of the entire illumination area is made constant by optimal weighting. Lighting control can be performed.

  On the other hand, the outside light changes depending on the time of day and the weather. Hereinafter, a method for determining weighting corresponding to a change in external light will be described with reference to FIG. FIG. 3 (a) shows the illuminance distribution of each illumination area by external light at a certain time in the morning, the dimming degree of each illumination system, the weighting of the sub-illumination systems 2 and 3, the external light and each illumination area by each illumination system. It is the correspondence table which showed each illumination intensity. FIG. 3B is a correspondence table when the dimming degree of the main illumination system 1 is changed corresponding to the change in external light in FIG. 3A, and FIG. 3C is a weighting change in FIG. FIG. 3D is a correspondence table showing a state after the above operation, and is a correspondence table when external light cannot be expected in FIG.

  First, when the target illumination intensity of the entire illumination area is set to 500 lx, when illuminated in the morning, as shown in FIG. 3A, the illumination intensity by the external light detected by the illumination sensor 7 is 200 lx, and the weight is the main illumination system 1: Sub-illumination system 2: Sub-illumination system 3 = 1: 1.4: 1.8 Assume that the dimming degree of the main illumination system 1 is 40% and matches the target illuminance. It is assumed that the ambient light increases at noon and the dimming degree of the main illumination system 1 matches the target illuminance at 14% as shown in FIG. However, the weighting is not changed here. As described above, the control unit 4d performs weighting when the dimming degree of the main lighting system 1 fluctuates, that is, when it is determined that there is a difference between the external light when the weighting is determined and the external light at an arbitrary time thereafter. Is read again from the storage means 6 and the light control is performed. The calculation of the illuminance on the floor surface due to outside light at noon first calculates the illuminance by each illumination system from the dimming degree at noon with reference to a table of dimming degree and target illuminance when it is turned on in the morning. Then, by subtracting the illuminance from the target illuminance, the value of illuminance due to external light can be obtained by calculation. As shown in FIG. 3C, since the illuminance due to external light was found to be 400 lx, the corresponding weighting was read out from the storage means 6, and the main illumination system 1: sub-illumination system 2: sub-illumination system 3 = 1: The dimming degree of each illumination system is controlled so that 2.8: 5.5.

  Further, when the time has passed and it is night, no external light can be expected. For example, as shown in FIG. 3 (d), for example, main illumination system 1: sub illumination system 2: sub illumination system 3 = 1: 0.8. 1: Dimming control is performed with the dimming degree of the main illumination system 1 being 80%.

  In the above description, the main lighting system 1 has been described as the lighting area of the floor side of the floor, the secondary lighting system 2 is the central portion of the floor, and the auxiliary lighting system 3 is the corridor side of the floor. The sub-illumination system 2 has a central portion of the floor, the sub-illumination system 3 has a floor-side portion of the floor as an illumination area, and the illumination area of the main illumination system 1 receives light from other adjacent luminaires. The structure in which a part is irradiated may be used. In this case, it can be similarly controlled by replacing the external light in the above description with light from an adjacent lighting fixture.

The figure which shows the whole structure of the illumination control apparatus of one Embodiment of this invention. The figure when the lighting control apparatus of FIG. 1 is arranged on the floor. Correspondence table of dimming degree, weighting, and illuminance distribution of each lighting system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Main illumination system 2, 3 ... Sub illumination system, 4a ... Main light control means, 4b, 4c ... Sub light control means, 7 ... Illuminance sensor

Claims (2)

A main lighting system consisting of one or more lighting fixtures;
An illuminance sensor for detecting the illuminance of the illumination area by the main illumination system;
Illuminance setting means for setting a target illuminance of the illumination area;
Main dimming means for controlling the dimming degree of the main illumination system according to the target illuminance and the illuminance detected by the illuminance sensor;
A secondary lighting system consisting of one or more lighting fixtures;
A sub-dimming means for setting the weighting for the dimming degree of the main lighting system by the target illuminance, the dimming degree of the main lighting system, and the illuminance detected by the illuminance sensor;
An illumination control device comprising:   The lighting control device according to claim 1, wherein the main lighting system is provided closest to the window.

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