JP2005243409A - Lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To always provide comfortable illumination regardless of illumination intensity of a lighting system using a dimming system or the like for dimming the illumination of an indoor space. <P>SOLUTION: This lighting system is provided with: two light sources such as a fluorescent lamp 12 having a color temperature of 8,000 K and a fluorescent lamp 13 having a color temperature of 3,000 K; and a control means 15 for controlling a ratio of the illumination intensity of the fluorescent lamp 12 (high color temperature) to that of the fluorescent lamp 13 (low color temperature) to be increased as illumination intensity designated by an adjustment means 20 such as an external controller is increased. Illumination is always brought into a comfortable state regardless of the total illumination intensity of the lighting system 10 by setting a combination of the illumination intensity and the color temperature in a range always comfortable to a human being. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an illuminating device used in a dimming system that performs dimming of illumination in an indoor space.

  2. Description of the Related Art Conventionally, there is known a dimming system that adjusts illumination in an indoor space using a lighting device and a controller that adjusts the illuminance of the lighting device as described in Patent Document 1. This dimming system can change the illuminance of the illumination according to the time zone, monitor the ambient brightness with a brightness sensor, etc., and change the illuminance of the illumination according to the ambient brightness. .

By the way, especially in a facility such as a convenience store that keeps lighting up for 24 hours, the power consumption for lighting alone will be considerable. There are attempts to reduce power consumption by reducing the illuminance of the lighting device from night to day when illuminance is not required.
JP 2002-299069 A

  However, when a lighting device of a bluish color (high color temperature) is used as the lighting device of the dimming system, it feels comfortable when the illuminance is increased, but it becomes a depressed feeling when the illuminance is lowered, On the other hand, when a lighting device having a reddish color (low color temperature) is used, it feels comfortable when the illuminance is lowered, but becomes harsh when the illuminance is increased. That is, if the illuminance of the lighting device is simply adjusted, both the comfortable case and the uncomfortable case are caused by the illuminance, and it is not always possible to provide a comfortable illumination.

  The present invention has been made in view of the above problems, and in an illumination device used for a dimming system that performs dimming of indoor space illumination, it is possible to always perform comfortable illumination regardless of the illuminance of the illumination device. It is an object to provide a simple lighting device.

  An illumination device according to the present invention includes a first light source having a first color temperature, a second light source having a second color temperature lower than the first color temperature by 2000 k or more, and illuminance specified by an external device. And a control means for controlling to increase the ratio of the illuminance of the first light source with respect to the illuminance of the second light source.

  Here, the relationship between the illuminance that humans feel comfortable and the color temperature will be described. As shown in the graph of FIG. 3, in a region where the color temperature is high, the user feels comfortable when the illuminance is high to some extent, but when the illuminance is low, the user feels depressed, and conversely, in the region where the color temperature is low. When the illuminance is low to some extent, it feels comfortable, but when the illuminance is high, it feels hot.

  Therefore, the illuminating device according to the present invention is configured such that the higher the illuminance specified by the external device such as the two light sources, that is, the first light source having a high color temperature and the second light source having a low color temperature, Control means for controlling the illuminance of the first light source (high color temperature) with respect to the illuminance of (low color temperature), and the higher the illuminance specified by the external device, The ratio of the illuminance of the first light source (high color temperature) to the illuminance of (low color temperature) is increased to increase the color temperature of the entire lighting device, so that the combination of illuminance and color temperature is always comfortable to humans. In order to ensure that the illumination is always in a comfortable state regardless of the illuminance of the lighting device, the relationship between the illuminance and the color temperature is set to Y (lx), and the color temperature is set to X (K). The following formula showing the relationship between each numerical value Oite, the coefficient "a" is intended for the purpose of adjusting to the range is 0.135 or more 0.19 or less.

Relational expression between illuminance and color temperature: Y = aX
It is preferable that the color temperatures of the two light sources are at least 2000K apart, and if the difference is smaller than that, the adjustable range of the color temperature is small, so that it is difficult to achieve the object of the invention.

  In the lighting device according to the present invention, the color temperature of the first light source is preferably 5500K or more, and the color temperature of the second light source is preferably 3500K or less. For example, the color temperature of the first light source is 7000K to 9000K. It is more preferable that the color temperature of the second light source is 2000K to 4000K.

  When the illuminance is reduced, it is desirable that the color temperature decreases as the illuminance decreases, and the output of the first light source (high color temperature) is changed in the range of 100% to 10%. The output of (low color temperature) is preferably changed in the range of 100% to 50% by reducing the amount of change. In general commercial facility lighting, the output of the second light source is 100% to 75%. It is even better to change within the range.

  Alternatively, the first light source and the second light source may be fluorescent lamps, and these two fluorescent lamps may be arranged in parallel.

  Furthermore, it is preferable to provide a light diffusing member that diffuses light generated from the first light source and the second light source.

  The illuminating device according to the present invention is configured such that the higher the illuminance specified by an external device such as a first light source having a higher color temperature and a second light source having a lower color temperature, and the second light source (lower Control means for controlling to increase the ratio of the illuminance of the first light source (high color temperature) to the illuminance of (color temperature) so that the combination of the illuminance and the color temperature is always within a comfortable range for humans. By doing so, it becomes possible to always make the illumination comfortable regardless of the illuminance of the illumination device.

  For this reason, for example, in facilities such as convenience stores, the illuminance of the lighting device in the facility is increased during the daytime when the outside of the facility is bright, and the illuminance of the lighting device in the facility is kept low during the nighttime to light. Even when saving energy, the lighting can always be in a comfortable state.

  Furthermore, the lighting device of the present invention is very versatile because it can be easily combined with a controller or the like that has been generally used by incorporating the above-mentioned control means. .

In addition, since the color temperature of the first light source is 5500K or more and the color temperature of the second light source is 3500K or less, the color temperature can be changed in a wide range by two light sources.
The illuminance of the lighting device can be adjusted over a wide range. This becomes more conspicuous when the color temperature of the first light source is 7000K to 9000K and the color temperature of the second light source is 2000K to 4000K.

  Moreover, an effective illuminating device can be easily realized by using the first light source and the second light source as fluorescent lamps and arranging two fluorescent lamps in parallel.

  Furthermore, by providing a light diffusing member that diffuses the light generated from the first light source and the second light source, two lights having different color temperatures are diffused and mixed, so that the lighting has a natural feeling. Can do.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a light control system using an illumination device according to an embodiment of the present invention, and FIG. 2 is a perspective view of the illumination device.

  The dimming system 1 includes an illumination device 10 according to the present invention and an adjusting unit 20 that adjusts the illuminance of the illumination device 10.

  The adjusting means 20 may be anything as long as it can adjust the illuminance of the lighting device 10, and for example, a rotary switch or a slider can be used. Further, a controller or the like that automatically adjusts the illuminance according to time, brightness of outside light, or the like may be used.

  In the present embodiment, it is assumed that the adjusting unit 20 can change the illuminance of the lighting device 10 between 1000 lx and 500 lx, for example.

  In the illuminating device 10, a fluorescent lamp 12 (first light source) having a color temperature of 8000 K and a fluorescent lamp 13 (second light source) having a color temperature of 3000 K are arranged in parallel on the pedestal 11. And the cover 14 which covers the fluorescent lamp 13 is attached.

  The cover 14 is, for example, milky white and the surface is formed in a frosted glass shape, and also serves as a light diffusing member that diffuses the light of the fluorescent lamp 12 and the fluorescent lamp 13, and the color temperature is thereby different. Since the two lights are diffused and mixed, the lighting can be natural.

  Further, the lighting device 10 includes a control unit 15 (not shown in FIG. 2) that controls each of the fluorescent lamp 12 and the fluorescent lamp 13 based on the illuminance adjusted by the adjusting unit 20.

  As shown in the graph of FIG. 4, the control means 15 includes the illuminance of the illumination device 10 (in parentheses, the color temperature of the entire illumination device at that time), the fluorescent lamp 12 (color temperature 8000 K), and the fluorescent lamp 13 (color). And a fluorescent lamp 12 and a fluorescent lamp with reference to the lookup table based on the illuminance of the lighting device 10 designated by the adjusting means 20. Each of the 13 outputs is controlled.

  Hereinafter, a specific control example will be shown.

  When the illuminance of the lighting device 10 is specified as 1000 lx by the adjusting means 20, the control means 15 sets the output of the fluorescent lamp 12 with a color temperature of 8000K to 100%, and the output of the fluorescent lamp 13 with a color temperature of 3000K is also 100. %, The color temperature of the entire lighting device 10 is 5500K.

  When the illuminance of the lighting device 10 is specified as 750 lx by the adjusting unit 20, the control unit 15 sets the output of the fluorescent lamp 12 having a color temperature of 8000K to 50% and the output of the fluorescent lamp 13 having a color temperature of 3000K. Is 100%, and the color temperature of the entire lighting device 10 is 4600K.

  When the illuminance of the lighting device 10 is specified as 500 lx by the adjusting unit 20, the control unit 15 sets the output of the fluorescent lamp 12 having a color temperature of 8000K to 10% and the output of the fluorescent lamp 13 having a color temperature of 3000K. Is 90%, and the color temperature of the entire lighting device 10 is 3500K.

  Of course, the illuminance other than the above can be changed in accordance with the lookup table shown in FIG.

  As described above, by changing the color temperature of the lighting device 10 to a temperature at which a human can feel comfortable according to the illuminance set by the adjusting means 20, the lighting by the lighting device 10 can always be in a comfortable state. it can.

  That is, it is possible to provide illumination that always keeps the color temperature comfortable by using it instead of a luminaire that changes illuminance with a conventional ordinary illuminance controller.

  When changing the illuminance, it is possible to eliminate the uncomfortable feeling during the change by continuously changing the outputs of the fluorescent lamp 12 and the fluorescent lamp 13.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to said aspect, For example, about the designated range of illumination intensity, it is not limited to 1000 lx to 500 lx.

  Moreover, you may use light sources other than a fluorescent lamp about the 1st light source and 2nd light source which are used for an illuminating device.

  Further, the color temperatures of the first light source and the second light source are not limited to 8000K and 3000K, respectively.

  Further, the ratio of the illuminance of each light source when various color temperatures are created by two light sources is not limited to the above.

The schematic block diagram of the light control system using the illuminating device by one embodiment of this invention Perspective view of the lighting device Graph showing the relationship between illuminance and color temperature Graph showing the relationship between illuminance and the output of each fluorescent lamp

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dimming system 10 Illuminating device 11 Base 12 Fluorescent lamp (1st light source)
13 Fluorescent lamp (second light source)
14 Cover (light diffusion member)
15 Control means 20 Adjustment means

Claims (6)

A first light source having a first color temperature;
A second light source having a second color temperature lower than the first color temperature by 2000 k or more;
And a control unit that controls to increase a ratio of the illuminance of the first light source to the illuminance of the second light source as the illuminance specified by the external device is higher.   The lighting device according to claim 1, wherein the color temperature of the first light source is 5500k or more, and the color temperature of the second light source is 4000k or less.   The lighting device according to claim 1 or 2, wherein the color temperature of the first light source is 7000K to 9000K, and the color temperature of the second light source is 2000K to 4000K.   The output of the first light source is continuously changed within a range of 10 to 100% and the output of the second light source is within a range of 50 to 100% according to the illuminance desired by the lighting device without being turned off. The lighting device according to any one of claims 1 to 3. The first light source and the second light source are fluorescent lamps;
The lighting device according to any one of claims 1 to 4, wherein the two fluorescent lamps are arranged in parallel.   The illumination device according to any one of claims 1 to 5, further comprising a light diffusion member that diffuses light generated from the first light source and the second light source.

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