JP6394872B2 - Ceiling lighting device and lighting control system - Google Patents

Description

Embodiments described herein relate generally to a ceiling lighting device and a lighting control system with improved comfort.

  2. Description of the Related Art Conventionally, in an office or the like, there has been proposed a lighting device that achieves both a light environment favorable for biological rhythm and energy saving. In this illuminating device, the spectral distribution and the amount of light irradiated by the illuminating device are controlled according to the time zone.

  There has also been proposed an illuminating device in which the amount of light having a wavelength that suppresses melatonin secretion is adjusted to change the degree of influence on melatonin secretion suppression. The illumination device includes a first light emitting unit and a second light emitting unit having different light distribution and spectral distribution, and switches the lighting state between the first light emitting unit and the second light emitting unit according to a time zone. I have control.

  However, with the conventional configuration, the light required to adjust the biological rhythm may be insufficient or excessive, and the visibility of the visual target may be deteriorated. Not taken into account.

JP2013-182820A Japanese Patent No. 4740934

The problem to be solved by the present invention is to provide a ceiling lighting device and a lighting control system capable of improving comfort.

The ceiling lighting device according to the embodiment includes a fixture main body, a first light emitting unit having a 1/2 beam angle of 45 degrees or less, and a second light emitting unit having a wider 1/2 beam angle than the first light emitting unit. And a control unit for controlling lighting states of the first light emitting unit and the second light emitting unit. The second light emitting unit is provided in the center of the instrument main body with the optical axis directed directly downward. The first light emitting unit is provided on both sides or the periphery of the instrument body with the optical axis directed in a direction different from the optical axis of the second light emitting unit. The ratio of the total luminous flux of the first light emitting unit to the total luminous flux of the second light emitting unit is 1 or less.

  According to the present invention, it can be expected to improve comfort and energy saving.

It is a block diagram of the illuminating device which shows 1st Embodiment. It is a graph which shows the light distribution characteristic of the 1st light emission part of an illuminating device same as the above. It is a graph which shows the light distribution characteristic of the 2nd light emission part of an illuminating device same as the above. It is a perspective view of an illuminating device same as the above. It is a side view of an illuminating device same as the above. It is the schematic which shows the scattering condition in the eye according to the quantity of the light which enters into eyes from other than a visual target to (a) (b). It is a graph which shows the relationship between a wavelength and the sensitivity of melatonin secretion suppression. It is a graph which shows the change of the melatonin secretion of 1 day. The control example 1 of an illuminating device same as the above is shown, (a) is a graph which shows the horizontal surface illumination intensity for every time zone, (b) (c) (d) is a schematic diagram which shows the light distribution for every time zone, respectively. The control example 2 of an illuminating device same as the above is shown, (a) is a graph which shows the illumination intensity for every time zone, (b), (c), (d) is a schematic diagram which shows the light distribution for every time zone, respectively. The control example 3 of an illuminating device same as the above is shown, (a) is a graph which shows the illumination intensity for every time slot | zone, (b) (c) is a schematic diagram which shows the light distribution for every time slot | zone, respectively. It is a block diagram of the illuminating device which shows 2nd Embodiment. It is a block diagram of an illuminating device same as the above. It is a perspective view of the illuminating device which shows 3rd Embodiment. It is a side view of the illuminating device which shows 4th Embodiment. It is a side view of the illuminating device which shows 5th Embodiment. It is a side view of the illuminating device which shows 6th Embodiment. It is a side view of the illuminating device which shows 7th Embodiment. It is an illuminating device which shows 8th Embodiment, (a) is a side view with a wide light distribution, (b) is a side view with a narrow light distribution. It is an illuminating device which shows 9th Embodiment, (a) is a side view of a state with a wide light distribution, (b) is a side view of a state with a narrow light distribution. It is an illuminating device which shows 10th Embodiment, (a) is a side view with a wide light distribution, (b) is a side view with a narrow light distribution. It is an illuminating device which shows 11th Embodiment, (a) is a side view of a state with a wide light distribution, (b) is a side view of a state with a narrow light distribution. It is a block diagram of the illumination control system which shows 12th Embodiment. It is a block diagram of the illumination control system which shows 13th Embodiment.

  Hereinafter, a first embodiment will be described with reference to FIGS. 1 to 11.

  FIG. 1 is a block diagram of the lighting device 10. The illumination device 10 includes a first light emitting unit 11, a second light emitting unit 12, and a control unit 13.

  As shown in FIG. 2, the first light emitting unit 11 has a light distribution characteristic in which a ½ beam angle is 45 degrees or less. As shown in FIG. 3, the second light emitting unit 12 has a light distribution characteristic in which a 1/2 beam angle is wider than that of the first light emitting unit 11. The 1/2 beam angle is an angle at which the luminous intensity is ½ compared to the vertical angle 0 °, or an angle at which the luminous intensity is ½ compared to the vertical angle (optical axis) of the maximum luminous intensity. is there.

  In the first light emitting unit 11 and the second light emitting unit 12, the ratio of the total luminous flux of the first light emitting unit 11 to the total luminous flux of the second light emitting unit 12 is 1 or less (total luminous flux / The total luminous flux of the second light emitting unit 12 is 1 or less). Preferably, the total luminous flux of the first light emitting unit 11 is smaller than the total luminous flux of the second light emitting unit 12. In addition, the first light-emitting unit 11 and the second light-emitting unit 12 each have a melatonin per unit light beam included in the first light-emitting unit 11 with respect to a melatonin secretion inhibiting action amount per unit light beam included in the second light-emitting unit 12. The ratio of the secretion suppression action amount is 1 or more (the total luminous flux of the first light emitting unit 11 / the total luminous flux of the second light emitting unit 12 = 1 or more). Preferably, the melatonin secretion inhibitory action amount per unit light beam included in the first light emitting unit 11 is greater than the melatonin secretion inhibitory action amount per unit light beam contained in the second light emitting unit 12. The melatonin secretion inhibitory action amount per unit luminous flux is a value obtained by multiplying a 1 lm spectral distribution by a melatonin secretion inhibitory action function and integrating the result, and multiplying by a coefficient.

  The melatonin secretion inhibitory action amount used here was a value calculated using equation (1), but other than that, equation (2) and model equations described in previous studies (for example, reference (1 ) To (4) model formulas) may be used.

Melatonin secretion inhibitory action amount = 4557∫P (λ) M (λ) dλ (1)
Melatonin secretion inhibitory action amount [m-lx]: index indicating action amount of melatonin secretion, P (λ): spectral distribution of light source [W / m ² ], M (λ): action curve of melatonin secretion Melanopic illumination = 1000 ∫P (λ) M (λ) dλ (2)
Melatonin secretion inhibitory action amount [m-lx]: Index indicating action amount of melatonin secretion, P (λ): Spectral irradiance of light source [W / m ² / nm], M (λ): Melatonin secretion action curve reference Literature
(1) Enezi, Ja, Revell, V., Brown, T., Wynne, J., Schlangen, L. and Lucas, R. Biol. Rhythms, 26-4, pp.314-323 (2011)
(2) DIN SPEC 5031-100: Optical radiation physics and illuminating engineering-Part 100: Non-visual effects of ocular light on human beings-Quantities, symbols and action spectra (2011)
(3) Rea, MS, Figueiro, MG, Bierman, A. and Bullough, JD: Circadian Light, J. Circadian Rhythms, 8-1, 2 (2010).
(4) Ryotaka Takahashi, Tetsuo Katsuura, Yoshihiro Shimomura, Koichi Iwanaga: Estimating the rate of suppression of melatonin secretion by light exposure, Journal of Science, 94-2, pp.124-134 (2010).

  The control unit 13 supplies power to the first light emitting unit 11 and the second light emitting unit 12, and controls the lighting states of the first light emitting unit 11 and the second light emitting unit 12, respectively. For example, the light amount, spectral distribution, and light distribution of the first light emitting unit 11 and the second light emitting unit 12 are controlled for each time period based on the schedule. In order to perform such control, the control unit 13 includes an information storage unit 14 that stores information including light quantity, spectral distribution, light distribution, and schedule.

  Next, FIG. 4 shows a perspective view of the lighting device 10 and FIG. 5 shows a side view of the lighting device 10.

  The lighting device 10 is a lighting fixture installed on a ceiling, for example. The lighting device 10 has an instrument body 17. The second light emitting unit 12 is disposed at the center of the lower surface of the instrument main body 17, and the first light emitting units 11 are disposed on both sides of the lower surface of the instrument main body 17 and on both sides of the second light emitting unit 12. The second light emitting unit 12 is formed on a horizontal plane perpendicular to the vertical direction, and the first light emitting unit 11 is formed on an inclined surface that is inclined outward with the second light emitting unit 12 as a center. A control unit 13 is installed on the upper surface of the instrument body 17.

  The first light emitting unit 11 has an optical axis 11a at a different vertical angle (for example, a vertical angle larger than 45 °) and a 1/2 beam angle of 45 ° or less with respect to a vertical angle of 0 ° which is the vertical direction. It has the following light distribution characteristics. The second light emitting unit 12 has an optical axis 12a at a vertical angle of 0 °, which is the vertical direction, and has a light distribution characteristic with a 1/2 beam angle wider than that of the first light emitting unit 11. Here, the angle formed by the optical axis 11a and the optical axis 12a is 60 degrees.

  By having the first light emitting unit 11 and the second light emitting unit 12 in such a relationship, the light distribution is widened or narrowed depending on the lighting state of the first light emitting unit 11 and the second light emitting unit 12. The amount of light entering the eye and the spectral distribution can be controlled.

  The first light emitting unit 11 and the second light emitting unit 12 have a light distribution that is symmetrical with respect to the optical axes 11a and 12a on the planes passing through the optical axes 11a and 12a, respectively. The light emitting units 11 and 12 may have a light distribution that is asymmetric with respect to the optical axes 11a and 12a on a plane passing through the optical axes 11a and 12a. For example, in the case of the first light emitting unit 11, the light distribution toward the ceiling side with respect to the optical axis 11a may spread.

  The light emitting units 11 and 12 may use any light source as long as the light amount, the spectral distribution, and the light distribution can be controlled. For example, a light emitting element such as an LED or an organic EL, or a lamp such as a fluorescent lamp or a halogen lamp may be used as the light source. The light color realization method for each light source is as follows: blue light source + phosphor, blue light source + phosphor + red light source, blue light source + phosphor + green light source, blue light source + phosphor + blue light source, red light source + green light source + blue light source , UV (including near UV) + phosphor, 2 or more types of white light source + red light source, 2 or more types of white light source + green light source, 2 or more types of white light source + blue light source, 2 or more types of white light source + red Light source + green light source, 2 or more types of white light source + red light source + blue light source, 2 or more types of white light source + green light source + blue light source, 2 or more types of white light source + red light source + green light source + blue light source, thermal radiation, etc. There is.

  The lighting device 10 can realize a comfortable lighting environment that is preferable for adjusting the visibility and biological rhythm of a visual target.

  Regarding visibility, it is generally said that the visibility of a visual target with high illuminance is high, and that the visibility of a visual target is high when the correlated color temperature is high. In addition, there is a knowledge that the visibility of a visual target can be improved by reducing the amount of light entering the eye from a portion other than the visual target. As shown in FIG. 6, for example, when the eye A is viewed, the amount of light that enters the eye from other than the object is larger (in FIG. 6 (b) than in FIG. 6 (a)). The amount of light entering the eye from other than the visual target) is said to be caused by large scattering in the eye.

  The biological rhythm is affected by the light entering the eyes. The biological rhythm described here means the rhythm of melatonin secretion. Melatonin is a hormone that affects the quality of sleep. The secretion of melatonin is suppressed by light entering from the eyes, and as shown in FIG. 7, the secretion is particularly suppressed by light of a blue component. As shown in FIG. 8, melatonin is generally not secreted in the morning and is secreted in a large amount at night. Therefore, a state where it is not secreted in the morning is desirable, and a state where it is secreted at night is desirable. However, if you are exposed to bright light or light containing a wavelength component that suppresses melatonin secretion in the morning, or bright light or light that contains a wavelength component that suppresses melatonin secretion at night, the secretion of melatonin However, since the desired state is not achieved, good sleep cannot be obtained, and as a result, it may be difficult to perform vigorous behavior in the daytime. In other words, the amount and quality of light that can be seen throughout the day must be considered in order to create a light environment favorable for biological rhythm.

  Next, the operation of this embodiment will be described.

  The lighting device 10 can arbitrarily adjust the dimming rate of the first light emitting unit 11 and the dimming rate of the second light emitting unit 12. For example, dimming examples 1 to 4 are shown below.

  In the dimming example 1, the first light emitting unit 11 and the second light emitting unit 12 are both 80% dimmed. In this case, the light distribution is wide and more light enters the eyes.

  In the dimming example 2, the first light emitting unit 11 is set to 0% dimming, and the second light emitting unit 12 is set to 80% dimming. In this case, the light distribution is narrow and less light enters the eyes.

  In the dimming example 3, the first light emitting unit 11 on one side is dimmed by 50%, the first light emitting unit 11 on the other side is dimmed by 30%, and the second light emitting unit is dimmed by 80%. And different light distribution on the other side.

  In the dimming example 4, the first light emitting unit 11 on one side is dimmed by 50%, the first light emitting unit 11 on the other side is dimmed by 0%, and the second light emitting unit is dimmed by 80%. And different light distribution on the other side.

  Further, the lighting device 10 can arbitrarily adjust the light distribution of the first light emitting unit 11. For example, the first light emitting unit 11 on one side has an asymmetrical light distribution with respect to the optical axis 11a on the surface passing through the optical axis 11a, and the first light emitting unit 11 on the other side is on the surface passing through the optical axis 11a. The light distribution is symmetric with respect to the optical axis 11a.

  In addition, the lighting device 10 can arbitrarily adjust the correlated color temperature of the first light emitting unit 11 and the correlated color temperature of the second light emitting unit 12. For example, correlated color temperature examples 1 to 3 are shown below.

  In the correlated color temperature example 1, both the first light emitting unit 11 and the second light emitting unit 12 have the same correlated color temperature.

  In the correlated color temperature example 2, the first light emitting unit 11 and the second light emitting unit 12 are set to different correlated color temperatures. For example, the first light emitting unit 11 is set to a correlated color temperature of 10000K or 5000K, and the second light emitting unit 12 is set to a correlated color temperature of about 4000K.

  In the correlated color temperature example 3, the first light emitting unit 11 on one side, the first light emitting unit 11 on the other side, and the second light emitting unit 12 are set to different correlated color temperatures. For example, the first light emitting unit 11 on one side has a correlated color temperature of 10000K, the first light emitting unit 11 on the other side has a correlated color temperature of 5000K, and the second light emitting unit 12 has a correlated color temperature of 4000K. .

  Next, a specific control example by the illumination device 10 will be described.

  The horizontal illuminance in a general office environment is constant at 750 lx (see, for example, JIS Z9110). Previous studies have reported that there is no problem in visual workability even when the horizontal illuminance is constant at 500 lx.

  A control example 1 is shown in FIG. FIG. 9A is a graph showing the horizontal illuminance for each time zone, and FIGS. 9B, 9C and 9D are schematic diagrams showing the light distribution of the illumination device 10 for each time zone.

  The illuminating device 10 controls the correlated color temperature of the light emitting units 11 and 12 to be constant at 5000K and the horizontal plane illuminance to be constant at 500 lx. In this case, for example, the luminous flux of the first light emitting unit 11 is 1217 lm (608.5 × 2), the luminous flux of the second light emitting unit 12 is 2972 lm, the total luminous flux is 4189 lm, and the energy saving performance is 33% compared to 750 lx constant. Reduction.

  A control example 2 is shown in FIG. FIG. 10A is a graph showing the horizontal illuminance for each time zone, and FIGS. 10B, 10C and 10D are schematic diagrams showing the light distribution of the illumination device 10 for each time zone.

  The lighting device 10 controls the light distribution so that the light emitting units 11 and 12 are turned on in the morning and noon hours, the first light emitting unit 11 is turned off in the night time and only the second light emitting unit 12 is turned on. Then, the correlated color temperature of each of the light emitting units 11 and 12 is controlled to be constant at 5000K, and the horizontal illuminance is controlled to be constant at 500 lx. In this case, for example, in the morning and afternoon hours, the luminous flux of the first light emitting unit 11 is 1217 lm (608.5 × 2), the luminous flux of the second light emitting unit 12 is 2972 lm, the total luminous flux is 4189 lm, In the time zone, the luminous flux of the first light emitting unit 11 is 0 lm, the luminous flux of the second light emitting unit 12 is 3894 lm, and the total luminous flux is 3894 lm. The energy saving performance is reduced by 35% on average compared to 750 lx constant.

  In this case, the light distribution is wide and the light entering the eyes is wide in the morning and noon time zone, and the light distribution is narrow and the light entering the eyes is small in the night time zone.

  In general, it is desirable that the illumination for adjusting the biological rhythm should have high illuminance in the morning time zone, medium illuminance in the day time zone, and low illuminance in the night time zone. In this case, based on the melatonin secretion inhibitory action amount, the biological rhythm cannot be adjusted only by controlling the light distribution so that the light distribution becomes narrower in the night time zone as in Control Example 2 shown in FIG. There is.

  Therefore, a control example 3 is shown in FIG. FIG. 11A is a graph showing the horizontal illuminance for each time zone, and FIGS. 11B, 11C and 11D are schematic diagrams showing the light distribution of the illumination device 10 for each time zone.

  The lighting device 10 sets the correlated color temperature of the light emitting units 11 and 12 to 10000 K and the horizontal plane illuminance to 750 lx in the morning time zone, and sets the correlated color temperature of the light emitting units 11 and 12 to 5000 K and the horizontal plane illuminance in the day time zone. The correlated color temperature of the second light emitting unit 12 is controlled to 4000 K and the horizontal illuminance is set to 400 lx in the night time zone. In this case, the light distribution control is performed so that the first light emitting unit 11 is turned off and only the second light emitting unit 12 is turned on in the night time zone.

  The melatonin secretion inhibitory action amount per unit luminous flux of the light emitting parts 11 and 12 in the morning time zone is 7.13, and the melatonin secretion inhibitory action amount per unit luminous flux of the light emitting parts 11 and 12 in the daytime time zone is 5. 06. The melatonin secretion inhibiting action amount per unit light beam of the second light emitting unit 12 in the night time zone is 4.26.

  By controlling the light distribution and spectral distribution of the lighting device 10 in this way, the amount of melatonin secretion inhibitory action amount is large and the amount of light entering the eyes is high in the morning and noon time zone, so that a sense of arousal can be given and The visibility of the object can be improved. In the night time zone, the melatonin secretion inhibitory action amount is small, and the visibility of the visual target can be improved while suppressing light entering the eyes.

  Therefore, comfort can be improved by ensuring a light environment preferable for biological rhythm and ensuring visibility required for the visual work environment. In addition, the energy saving performance at this time is an average of 28% reduction compared to the constant horizontal plane illuminance of 750 lx, so that it is possible to obtain the lighting device 10 that achieves both comfort and energy saving performance.

  The contents of the above control examples and the contents of the following control examples are based on the results calculated under the following lighting design calculation conditions.

Size of lighting environment: width 14.4m, depth 14.4m, height 2.8m
Interior reflectance of lighting environment: ceiling 70%, wall 50%, floor 10%
Number of lighting devices: 24 Maintenance rate of lighting devices: 1.0
Horizontal illuminance position: 0.8m above the floor
Light source: Blackbody radiation (Here, blackbody radiation is used as the light source because there is a standard calculation formula for obtaining the spectral distribution, and the melatonin secretion inhibitory effect does not depend on the type of light source and depends on the correlated color temperature. This is because of the knowledge that
Energy saving: The light emission efficiency lm / W of the light source is calculated as the same regardless of the dimming and type

  Further, in the control example 4, the lighting device 10 sets the correlated color temperature of the first light emitting unit 11 in the morning time zone to 10000 K and the correlated color temperature of the second light emitting unit 12 to 5000 K, and the horizontal illuminance to 750 lx. The correlated color temperature of the second light emitting unit 12 in the daytime period is set to 5000 K and the horizontal plane illuminance is set to 500 lx, and the correlated color temperature of the second light emitting unit 12 in the night time period is controlled to 4000 K and the horizontal plane illuminance is set to 400 lx. . In this case, light distribution control is performed so that the first light-emitting unit 11 is turned off and only the second light-emitting unit 12 is lit during the daytime and nighttime periods.

  In the morning time zone, the melatonin secretion inhibiting action amount per unit light beam of the first light emitting unit 11 is 7.13, and the melatonin secretion inhibiting action amount per unit light beam of the second light emitting unit 12 is 5.06, daytime The melatonin secretion inhibiting action amount per unit luminous flux of the second light emitting unit 12 in the band is 5.06, and the melatonin secretion inhibiting action amount per unit luminous flux of the second light emitting unit 12 in the night time zone is 4.26. .

  Also in this control example 4, comfort can be improved by ensuring a light environment preferable for biological rhythm and ensuring visibility required for the visual work environment. In addition, since the energy saving performance at this time is reduced by 30% on average compared to a constant horizontal plane illuminance of 750 lx, it is possible to obtain the lighting device 10 that achieves both comfort and energy saving performance.

  Further, in the control example 5, the lighting device 10 sets the correlated color temperature of the first light emitting unit 11 in the morning time zone to 10000 K and the correlated color temperature of the second light emitting unit 12 to 4000 K, and the horizontal illuminance to 750 lx. , The correlated color temperature of the first light emitting unit 11 in the daytime period is set to 5000K, the correlated color temperature of the second light emitting unit 12 is set to 4000K, the horizontal illuminance is set to 500 lx, and the second light emitting unit in the night time period Twelve correlated color temperatures are controlled to 4000K and horizontal illuminance to 400 lx. In this case, the light distribution control is performed so that the first light emitting unit 11 is turned off and only the second light emitting unit 12 is turned on in the night time zone.

  In the morning time zone, the melatonin secretion inhibiting action amount per unit light beam of the first light emitting unit 11 is 7.13, and the melatonin secretion inhibiting action amount per unit light beam of the second light emitting unit 12 is 4.26, daytime The melatonin secretion inhibiting action amount per unit luminous flux of the first light emitting portion 11 of the band is 5.06, and the melatonin secretion inhibiting action amount per unit luminous flux of the second light emitting portion 12 is 4.26, which is the first in the night time zone. The melatonin secretion inhibitory action amount per unit luminous flux of the two light emitting portions 12 is 4.26.

  Also in this control example 5, comfort can be improved by ensuring a light environment preferable for a biological rhythm and ensuring visibility required for a visual work environment. In addition, the energy saving performance at this time is an average of 28% reduction compared to the constant horizontal plane illuminance of 750 lx, so that it is possible to obtain the lighting device 10 that achieves both comfort and energy saving performance.

  In the control example 6, the lighting device 10 sets the correlated color temperature of the light emitting units 11 and 12 in the morning time zone to 5000 K and the horizontal illuminance to 750 lx, and the correlated color of the light emitting units 11 and 12 in the day time zone. The temperature is set to 5000 K, the horizontal plane illuminance is set to 500 lx, the correlated color temperature of the second light emitting unit 12 in the night time zone is controlled to 3000 K, and the horizontal plane illuminance is controlled to 400 lx. In this case, the light distribution control is performed so that the first light emitting unit 11 is turned off and only the second light emitting unit 12 is turned on in the night time zone.

  The melatonin secretion inhibiting action amount per unit luminous flux of each light emitting part 11, 12 in the morning time zone is 5.06, and the melatonin secretion inhibiting action amount per unit luminous flux of each light emitting part 11, 12 in the day time zone is 5. 06, the melatonin secretion inhibitory action amount per unit luminous flux of the second light emitting unit 12 in the night time zone is 3.12.

  Also in this control example 6, comfort can be improved by ensuring a light environment preferable for biological rhythm and ensuring visibility required for the visual work environment. In addition, the energy saving performance at this time is 24% on average lower than the constant illuminance of 750 lx in the horizontal plane, so that the lighting device 10 that achieves both comfort and energy saving performance can be obtained.

  In the control example 7, the lighting device 10 sets the correlated color temperature of the light emitting units 11 and 12 in the morning time zone to 5000 K and the horizontal illuminance to 750 lx, and the correlated color of the light emitting units 11 and 12 in the day time zone. The temperature is set to 5000 K, the horizontal plane illuminance is set to 500 lx, the correlated color temperature of each light emitting unit 11 and 12 in the night time zone is controlled to 3000 K, and the horizontal plane illuminance is controlled to 500 lx.

  The melatonin secretion inhibiting action amount per unit luminous flux of each light emitting part 11, 12 in the morning time zone is 5.06, and the melatonin secretion inhibiting action amount per unit luminous flux of each light emitting part 11, 12 in the day time zone is 5. 06, the melatonin secretion inhibitory action amount per unit luminous flux of the light emitting units 11 and 12 in the night time zone is 3.12.

  Also in this control example 7, comfort can be improved by ensuring a light environment preferable for biological rhythm and ensuring visibility required for the visual work environment. In addition, since the energy saving performance at this time is reduced by an average of 22% compared to the constant horizontal plane illuminance of 750 lx, it is possible to obtain the lighting device 10 that achieves both comfort and energy saving performance.

  Further, in the control example 8, the lighting device 10 sets the first light emitting unit 11 in the morning time zone to blue light and the second light emitting unit 12 to 4000 K and the horizontal illuminance to 750 lx, and the first light emitting unit 11 in the daytime time zone. The correlated color temperature of the second light emitting unit 12 is set to 4000 K and the horizontal plane illuminance is set to 500 lx, and the correlated color temperature of the second light emitting unit 12 in the night time zone is controlled to 4000 K and the horizontal plane illuminance is set to 400 lx. In this case, light distribution control is performed so that the first light-emitting unit 11 is turned off and only the second light-emitting unit 12 is lit during the daytime and nighttime periods.

  In the morning time zone, the melatonin secretion inhibiting action amount per unit light beam of the first light emitting unit 11 is 8.68, and the melatonin secretion inhibiting action amount per unit light beam of the second light emitting unit 12 is 4.26, daytime The melatonin secretion inhibiting action amount per unit luminous flux of the second light emitting unit 12 in the band is 4.26, and the melatonin secretion inhibiting action amount per unit luminous flux of the second light emitting unit 12 in the night time zone is 4.26. .

  Also in this control example 8, comfort can be improved by ensuring a light environment preferable for biological rhythm and ensuring visibility required for the visual work environment. In addition, since the energy saving performance at this time is reduced by 30% on average compared to a constant horizontal plane illuminance of 750 lx, it is possible to obtain the lighting device 10 that achieves both comfort and energy saving performance.

  Note that the values of the horizontal illuminance and the correlated color temperature in each time zone are not limited to the numerical values in each control example, but may be other values or ranges. Basically, it is desirable to determine the value and range of the horizontal illuminance with reference to the JIS standard (for example, JIS Z9110), and the correlated color temperature with reference to the JIS standard (for example, JISZ8725). However, since the amount of light entering the eye may vary depending on the age even if the horizontal illuminance is the same due to the visual function deterioration due to age, both the horizontal illuminance and the correlated color temperature may be set outside the range of the JIS standard depending on the situation. In the control example, the light source is calculated with black body radiation for the sake of convenience. However, the light source may be an individual light source such as an LED light source or an organic EL, a fluorescent lamp, or a halogen lamp. The energy saving performance is calculated as the same luminous efficiency lm / w. However, when light sources having different luminous efficiency are used, the energy saving performance may be slightly lower than that described in Control Example 1. In addition, the angle formed by the optical axis 11a of the first light emitting unit 11 and the optical axis 12a of the second light emitting unit 12 is 60 degrees, but other angles may be used as long as they are 0 degrees or more and 180 degrees or less. .

  And according to the illuminating device 10 of this embodiment, by using the 1st light emission part 11 and the 2nd light emission part 12 of different light distribution, since the light quantity in an eye position or a work surface can be controlled, For example, comfort can be improved by ensuring a light environment preferable for a biological rhythm and ensuring visibility required for a visual work environment.

  The ratio of the total luminous flux of the first light emitting unit 11 to the total luminous flux of the second light emitting unit 12 is 1 or less, and preferably the total luminous flux of the first light emitting unit 11 is greater than the total luminous flux of the second light emitting unit 12. By having a small relationship, it is possible to control the light entering the eye while ensuring the illuminance of the work surface.

  Further, by using the first light emitting unit 11 and the second light emitting unit 12 having different light distribution and melatonin secretion inhibiting action amount, the light amount and the spectral distribution on the eye surface and the work surface can be controlled. Therefore, comfort can be improved by ensuring a preferable light environment and ensuring visibility required for a visual work environment.

  The ratio of the melatonin secretion inhibiting action amount per unit light beam contained in the first light emitting part 11 to the melatonin secretion inhibiting action amount per unit light beam contained in the second light emitting part 12 is 1 or more, preferably the second The illuminance of the work surface is ensured by having a relationship in which the melatonin secretion inhibiting action amount per unit light beam contained in the first light emitting unit 11 is larger than the melatonin secretion inhibiting action amount per unit light beam contained in the light emitting unit 12. However, the melatonin secretion inhibitory action can be controlled.

  Further, since the position of the eyes and the light amount and the spectral distribution on the work surface can be controlled for each time zone based on the schedule, the comfort can be further improved and the energy saving can be improved.

  Further, by providing the optical axis 11a of the first light emitting unit 11 and the optical axis 12a of the second light emitting unit 12 in different directions, even if the first light emitting unit 11 has a narrow light distribution characteristic, The amount of light entering and the spectral distribution can be controlled.

  In addition, the lighting device 10 has a function of acquiring information from the outside, so that it is possible to perform control in consideration of information from the outside such as daylight, absence of a person, age of a worker, and the like.

  Next, FIG. 12 and FIG. 13 show a second embodiment. In addition, the same code | symbol is used about the same structure as 1st Embodiment, and the description about the structure and effect is abbreviate | omitted.

  As shown in FIG. 12, the lighting device 10 receives information from the external information output unit 20 and controls the first light emitting unit 11 and the second light emitting unit 12. The external information output unit 20 includes at least one of a daylight sensor 20a that detects daylight, a human sensor 20b that detects a human body as a detection unit, and a remote controller 20c that transmits a signal.

  The lighting device 10 includes an external information acquisition unit 21 that acquires external information from the external information output unit 20. The control unit 13 of the lighting device 10 controls the first light emitting unit 11 and the second light emitting unit 12 based on the external information acquired by the external information acquiring unit 21.

  First, the contents of control by the control unit 13 when the external information output unit 20 is the daylight sensor 20a will be described. As the daylight sensor 20a, a photodiode, an image sensor, or the like is used. The control using the daylight sensor 20a is to control the light output of the lighting device 10 so as to maintain the illuminance and the correlated color temperature set according to the daylight. With this control, the amount of light of the illumination device 10 can be reduced by the amount of daylight, so energy can be saved while maintaining the set value.

  For example, when the control content shown in FIG. 11 is combined with the control using the daylight sensor 20a, the horizontal plane illuminance secured by the lighting device 10 is shown in FIG. Compared to the control content shown, the horizontal illuminance can be reduced from about 750 lx to 650 lx in the morning time zone, and the horizontal illuminance can be reduced from about 500 lx to about 400 lx in the daytime time zone. Therefore, the energy saving property can be improved from an average of 28% to an average of 37%.

Here, an example in which the horizontal plane illuminance of 100 lx is incident simply by daylight has been described, but since daylight fluctuates depending on the time zone, the brightness of the window surface is detected by the daylight sensor (for example, image sensor sensor) 20a. The light output of the illumination device 10 may be controlled so that the horizontal illuminance becomes a predetermined value. The system configuration at this time is as shown in FIG. 13, and the brightness of the window surface is controlled by the window surface control unit 22. As the window surface control unit 22, a blind, a roll screen, a polymer dispersed liquid crystal whose diffusivity can be set by voltage, or the like is used. By the way, if you have a two-sided lighting space (if the size of the window is 1m ² , 10 pieces are arranged side by side per wall. The center of the window is 2m from the floor) The average luminance of the surface needs to be 556 cd / m ² (when the window surface has a Lambertian light distribution). For this reason, it is preferable to detect the brightness of the window surface with a daylight sensor (for example, an image sensor) and control the window surface control unit 22 so that the brightness of the window surface becomes 556 cd / m ² . In this case, the daylight sensor 20a includes a sensor for detecting the brightness of the window surface (the object of feedback is the window surface control unit 22) and a sensor for detecting the horizontal illuminance in the illumination space (the object of feedback is the lighting device 10). There may be a kind. When the brightness of the window surface is controlled to a high value, most of the predetermined horizontal surface illuminance can be obtained by using daylight, which saves energy, but the window surface feels dazzling. Therefore, the luminance of the window surface is at least 10000 cd / ^{m 2} or less, it is desirable to control Madomen controller 22 so as to be 3000 cd / ^{m 2} or less if possible. In addition, although an example of daytime control is shown here, the function of the window surface control unit 22 is turned off at night (for example, the blind is closed), and the brightness of the window surface control unit 22 and the wall surface is adjusted to a daylight sensor (for example, Further, the brightness of the window surface control unit 22 and the wall surface may be controlled by the light output of the lighting device 10 so that the space feels bright by detecting the image sensor 20a.

  Next, in FIG. 12, the control content by the control unit 13 in the case where the external information output unit 20 is the human sensor 20 b will be described.

  As the human sensor 20b, an infrared sensor, an image sensor, or the like is used. Control of the lighting device 10 using the human sensor 20b means that, for example, the lighting device 10 is turned on when the person is present, and the lighting device 10 is turned off when the person is absent. In this way, the control increases the energy saving effect. Furthermore, the human sensor 20b may detect the position of a person working on the work surface, and control the light distribution of the lighting device 10 according to the position of the person.

  For example, when there are 30 seats on a floor and the seating rate is 100% if all 30 people are sitting, and the seating rate is 50% for 15 people, the horizontal plane illumination is reduced as the enrollment rate decreases. If the seating rate in the morning is 90%, the seating rate in the daytime is 80%, and the seating rate in the night is 50%, the energy saving performance is 28% on average compared to the control content shown in FIG. To an average of 37%.

  Next, the contents of control by the control unit 13 will be described when the external information output unit 20 is both the daylight sensor 20a and the human sensor 20b. By using both the daylight sensor 20a and the human sensor 20b, the energy saving performance can be improved from 28% to 45% compared to the control content shown in FIG.

  Next, the contents of control by the control unit 13 when the external information output unit 20 is the remote controller 20c will be described. The remote controller 20c is an electronic device that transmits or receives preset information. As the remote controller 20c, an infrared remote controller, a personal computer, a tablet, a smartphone, a mobile phone, an RFID (IC tag), or the like is used.

  By controlling the lighting device 10 using the remote controller 20c, it is possible to provide a more effective lighting environment setting for the operator. For example, in the case of an elderly person, the transmittance of the crystalline lens (the part having the lens function in the eye) is lower than that of a young person, so even if the same thing is seen, it feels darker. Therefore, when young people and elderly people coexist in the work environment, it is desirable to transmit age information from the remote controller 20c according to the situation and change the setting values of the horizontal plane illuminance and the frontal vertical illuminance. In addition to age, information on vision such as vision, color vision, and control functions, preferences, affiliation, gender, address, past illness / skin / symptoms, mental status, waking up / sleeping time, etc. One week time schedule, one month time schedule, one year time schedule, birth, past living place and information on the place, reaction to light, race, language, family composition, annual income, personality, current place / position There is information about individuals such as. The information to be transmitted / received may be a single unit or a combination thereof.

  Next, FIGS. 14 to 22 show third to eleventh embodiments, respectively. In addition, the same code | symbol is used about the same structure as said each embodiment, and the description about the structure and effect is abbreviate | omitted.

  In the third embodiment of FIG. 14, the second light emitting unit 12 is arranged at the center of the lower surface of the lighting device 10, and the lower surface periphery of the lighting device 10 so that the first light emitting unit 11 surrounds the second light emitting unit 12. Placed in. By adopting such a positional relationship between the first light emitting unit 11 and the second light emitting unit 12, the light distribution can be broadened depending on the lighting state of the first light emitting unit 11 and the second light emitting unit 12. The amount of light entering the eye and the spectral distribution can be controlled.

  In the fourth embodiment of FIG. 15, the second light emitting unit 12 is disposed on the lower surface of the lighting device 10, and the first light emitting unit 11 is located on the side surface of the lighting device 10. The 1st light emission part 11 has a form like a spotlight. By adopting such a positional relationship between the first light emitting unit 11 and the second light emitting unit 12, the light distribution can be broadened depending on the lighting state of the first light emitting unit 11 and the second light emitting unit 12. The amount of light entering the eye and the spectral distribution can be controlled.

  In the fifth embodiment of FIG. 16, the mounting directions of the first light emitting unit 11 and the second light emitting unit 12 with respect to the lighting device 10 are different, and the angle formed by the ceiling and the mounting surface of each light emitting unit 11, 12 is the first. The first light emitting unit 11 is installed to be larger than the two light emitting units 12. By adopting such a positional relationship between the first light emitting unit 11 and the second light emitting unit 12, the light distribution can be broadened depending on the lighting state of the first light emitting unit 11 and the second light emitting unit 12. The amount of light entering the eye and the spectral distribution can be controlled.

  In the sixth embodiment of FIG. 17, the second light emitting unit 12 is disposed at the center of the lower surface of the lighting device 10, and the first light emitting unit 11 is on both sides of the second light emitting unit 12 and the lower surface of the lighting device 10. It is arranged on both sides and installed so that the irradiation directions of the first light emitting units 11 on both sides intersect each other. By setting the positional relationship between the first light emitting unit 11 and the second light emitting unit 12 as described above, the light distribution can be changed depending on the lighting state of the first light emitting unit 11 and the second light emitting unit 12. it can.

  In the seventh embodiment of FIG. 18, the illuminating device 10 includes a reflecting plate 24 as a light shielding portion that protrudes obliquely downward from both lower sides of the illuminating device 10. The second light emitting unit 12 is disposed on the lower surface of the lighting device 10, and the first light emitting unit 11 is disposed on the upper surface of the reflecting plate 24 on the opposite side to the second light emitting unit 12. By adopting such a positional relationship between the first light emitting unit 11 and the second light emitting unit 12, the light distribution can be narrowed depending on the lighting state of the first light emitting unit 11 and the second light emitting unit 12, It can be widened. In addition, the light from the first light emitting unit 11 and the light from the second light emitting unit 12 can be separated by the reflector 24, and the amount of light entering the eye and the spectral distribution can be controlled.

  In the eighth embodiment of FIG. 19, the second light emitting unit 12 is disposed at the center of the lower surface of the lighting device 10, and the first light emitting unit 11 is attached to both sides of the second light emitting unit 12 by the movable unit 26. Yes. The movable unit 26 is controlled by the control unit 13. As shown in FIG. 19 (a), the first light emitting section 11 on both sides has a wide light distribution toward the outside as shown in FIG. 19 (a), and the night time zone is shown in FIG. 19 (b). In addition, the first light emitting portions 11 on both sides have a narrow light distribution toward the inside. Thereby, the light distribution can be widened or narrowed, and the amount of light entering the eye and the spectral distribution can be controlled.

  In the ninth embodiment of FIG. 20, the lighting device includes a deformable portion 28 whose bending direction can be reversed. The second light emitting unit 12 is disposed at the center of the lower surface of the deforming unit 28, and the second light emitting unit 12 is disposed on both sides of the first light emitting unit 11 and on both sides of the deforming unit 28. The deformation unit 28 is controlled by the control unit 13. As shown in FIG. 20 (a), the first light emitting section 11 on both sides has a wide light distribution toward the outside as shown in FIG. 20 (a), and the night time zone is shown in FIG. 20 (b). In addition, the first light emitting portions 11 on both sides have a narrow light distribution toward the inside. Thereby, the light distribution can be widened or narrowed, and the amount of light entering the eye and the spectral distribution can be controlled.

  In the tenth embodiment of FIG. 21, the first light emitting unit 11 is configured to be movable in the vertical direction. In the morning and noon time zone, the first light emitting unit 11 is arranged at a high position, and in the night time zone, the lighting device 10 is controlled to move to a low position, so that the light distribution depends on the time zone. The amount of light entering the eye and the spectral distribution can be controlled.

  In the eleventh embodiment of FIG. 22, the illumination device 10 is configured to be movable in the vertical direction. For example, the lighting device 10 is moved in the vertical direction by changing the length of the support column that supports the lighting device 10. The lighting device 10 is placed at a high position during the morning and noon hours, and the lighting device 10 is controlled to move to a lower position during the night time period, thereby widening the light distribution according to the time zone. The amount of light entering the eye and the spectral distribution can be controlled.

  Next, FIGS. 23 and 24 show the twelfth and thirteenth embodiments. In addition, about the same structure as each said embodiment, the same code | symbol is used and the description about the structure and effect is abbreviate | omitted.

  A lighting control system 40 is shown in the twelfth embodiment of FIG. In the illumination control system 40, the control units 13 of the plurality of illumination devices 10 are connected so as to communicate with each other.

  Depending on the situation and scene, a plurality of lighting devices 10 can be linked together, and the lighting state of the first light emitting unit 11 and the second light emitting unit 12 can be finely controlled by the control unit 13 of each lighting device 10. it can.

  In the thirteenth embodiment shown in FIG. 24, the illumination control system 40 includes one control device 43 and a plurality of illumination devices 10 that are connected to the control device 43 and controlled. The control device 43 includes a control unit 13 similar to the lighting device 10.

  And according to a situation or a scene, by giving the command to the some illuminating device 10 from the control part 13 of the control apparatus 43, the 1st light emission part 11 and the 2nd light emission part by the control part 13 of each illuminating device 10 Twelve lighting states can be finely controlled.

  In the lighting control system 40, when the control device 43 includes the control unit 13, each lighting device 10 may not include the control unit 13.

  Further, in the lighting control system 40, the lighting device 10 or the control device 43 includes an external information acquisition unit 21 that acquires information from the external information output unit 20, and the control unit 13 of each lighting device 10 performs the first operation according to the external information. The lighting state of the first light emitting unit 11 and the second light emitting unit 12 may be controlled.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 Lighting device as ceiling lighting device
11 First light emitting section
11a Optical axis
12 Second light emitter
12a Optical axis
13 Control unit
17 Instrument body
40 Lighting control system

Claims (6)

A ceiling lighting device installed on a ceiling,
An instrument body;
A first light emitting part with a 1/2 beam angle of 45 degrees or less;
A second light emitting part having a wider 1/2 beam angle than the first light emitting part;
A control unit for controlling lighting states of the first light emitting unit and the second light emitting unit;
Comprising
The second light emitting unit is provided in the center of the instrument body with the optical axis directed in a direction directly below,
The first light emitting unit is provided on both sides or the periphery of the instrument body with the optical axis directed in a direction different from the optical axis of the second light emitting unit,
The ceiling illumination device, wherein a ratio of a total luminous flux of the first light emitting unit to a total luminous flux of the second light emitting unit is 1 or less. A ceiling lighting device installed on a ceiling,
An instrument body;
A first light emitting part with a 1/2 beam angle of 45 degrees or less;
A second light emitting part having a wider 1/2 beam angle than the first light emitting part;
A control unit for controlling lighting states of the first light emitting unit and the second light emitting unit;
Comprising
The second light emitting unit is provided in the center of the instrument body with the optical axis directed in a direction directly below,
The first light emitting unit is provided on both sides or the periphery of the instrument body with the optical axis directed in a direction different from the optical axis of the second light emitting unit,
Ceiling, wherein the second ratio of melatonin secretion inhibiting effect per unit luminous flux included in the first light emitting portion for melatonin secretion inhibition per unit luminous flux included in the light emitting portion of at least one use lighting device. The ceiling illumination device according to claim 1 , wherein an optical axis of the first light emitting unit is provided toward an outer side of the instrument main body . An illumination device for a ceiling installed on a ceiling, an instrument body, a first light emitting unit having a 1/2 beam angle of 45 degrees or less, and an angle having a 1/2 beam angle wider than that of the first light emitting unit The second light emitting part is provided at the center of the instrument body with the optical axis directed directly downward, and the first light emitting part is disposed on both sides of the instrument body or The optical axis is provided in the periphery in a direction different from the optical axis of the second light emitting unit, and the ratio of the total luminous flux of the first light emitting unit to the total luminous flux of the second light emitting unit is 1 or less. A plurality of ceiling lighting devices that are;
A control unit for controlling lighting states of the first light emitting unit and the second light emitting unit of the plurality of ceiling lighting devices;
An illumination control system comprising: An illumination device for a ceiling installed on a ceiling, an instrument body, a first light emitting unit having a 1/2 beam angle of 45 degrees or less, and an angle having a 1/2 beam angle wider than that of the first light emitting unit The second light emitting part is provided at the center of the instrument body with the optical axis directed directly downward, and the first light emitting part is disposed on both sides of the instrument body or The first light emission with respect to the melatonin secretion inhibitory action amount per unit light beam provided in the periphery in a direction different from the optical axis of the second light-emitting unit and included in the second light-emitting unit A plurality of ceiling lighting devices in which the ratio of the melatonin secretion inhibiting action amount per unit light beam contained in the unit is 1 or more;
A control unit for controlling lighting states of the first light emitting unit and the second light emitting unit of the plurality of ceiling lighting devices;
An illumination control system comprising: Before SL optical axis of the first light emitting unit, lighting control system according to claim 4 or 5, wherein the provided toward the outer side of the instrument body.

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