JP4333604B2 - Lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system whereby a user can obtain a desired light color in a shorter time compared with the conventional one. <P>SOLUTION: A controller 2 acting as a control device is equipped with a light control signal generating means to generate a light control signal for obtaining light output of each light source La, Lb set based on the indicated value for each of color temperature and illuminance, a subtracting means to find the difference value between a target value for each of the color temperature and the illuminance and a detected value for each of the color temperature and the illuminance detected by a measuring instrument 3, and a correction value operating means to individually find a correction value obtained by multiplying each of the difference value of the color temperature and the difference value of the illuminance by a correction factor. When setting the light output of each light source La, Lb by correcting each of the indicated values for the color temperature and the illuminance so that the difference value for each of the color temperature and the illuminance falls within an allowable range, each correction factor used in the correction value operating means is made smaller, as the difference value for each of the color temperature and the illuminance becomes larger. <P>COPYRIGHT: (C)2006,JPO&amp;NCIPI

Description

  The present invention relates to an illuminating device that can obtain mixed light of a desired light color by adjusting a ratio of light output of each type of light source using a plurality of light sources having different light colors, and is mainly used in a house or an office. The present invention relates to an illumination device suitable for use as illumination.

  Conventionally, when it is desired to change the light color of illumination in a luminaire, the light color is changed by changing the light source to a desired light source each time or by switching on a plurality of light sources having different light colors. And changed the atmosphere in the room. However, when the light source is changed or the light source to be turned on is switched in this way, only the light color of each light source can be obtained, and an intermediate light color cannot be obtained.

  Accordingly, there has been proposed an illuminating device in which a plurality of light sources having different light colors are provided in one luminaire, and a mixed color light of a desired light color can be obtained by changing the light output ratio of each light source. (For example, refer to Patent Document 1).

  However, in the lighting device disclosed in Patent Document 1, each light source of the lighting fixture is dimmed and lit by a dimming signal generated based on the toning data output in accordance with the operation of the operation setting unit. Therefore, the desired light color matches the light color of the mixed color light actually obtained by the lighting fixture due to variations in the light color of each light source, variations in the luminous flux, and a decrease in the amount of light due to the decrease in luminous flux. However, it was not necessarily the light color that users wanted.

Therefore, a measuring instrument that detects the color temperature and illuminance of the mixed light obtained by the lighting fixture is provided, and the target value of the color temperature and illuminance corresponding to the desired light color and the color temperature and illuminance detected by the measuring instrument are An illuminating device in which each light source of the luminaire is dimmed with a dimming signal corrected based on the difference value is conceivable.
Japanese Patent No. 2607746

  However, in the lighting device configured to correct the dimming signal based on the detection value of the measuring instrument as described above, first, each light source of the luminaire is adjusted with the dimming signal generated using the target value as the instruction value. Light is turned on, and then the lighting fixture is a dimming signal generated as a new indication value by adding the difference value between the target value of color temperature and illuminance and the detected value of color temperature and illuminance by the measuring instrument to the indication value Each light source is dimmed, so if the difference value of color temperature or illuminance is large, the rise or fall speed of the color temperature or illuminance increases and the color temperature or illuminance overshoots the target value. Or undershoot or vibrate, and the time until the difference value between the color temperature and the illuminance falls within the permissible range becomes longer. Further, when the color temperature and illuminance vibrate in this way, the user may be uncomfortable.

  This invention is made | formed in view of the said reason, The objective is to provide the illuminating device which can obtain the light color which a user desires in a short time compared with the former.

  According to the first aspect of the present invention, there is provided a lighting apparatus having a plurality of light sources having different light colors and a plurality of lighting devices for receiving light control signals and controlling the light output of each light source, and indicating target values for color temperature and illuminance. A control device that generates a dimming signal to be given to each lighting device as a value, and a measuring instrument that detects the color temperature and illuminance obtained by the lighting fixture, and the control device is based on the indication values of the color temperature and illuminance, respectively. A dimming signal generating means for generating a dimming signal for obtaining a light output of each set light source, and a difference value between a target value for each of color temperature and illuminance and a detected value for each of color temperature and illuminance by a measuring instrument A subtracting means to be obtained separately; and a correction value calculating means to separately obtain a correction value obtained by multiplying each of the difference value of color temperature and the difference value of illuminance obtained by the subtracting means by a correction coefficient. When setting the light output of each light source by correcting the indicated value of each color temperature and illuminance with the correction value so that each difference value falls within the allowable range, each correction coefficient used in the correction value calculation means, The difference between the color temperature and the illuminance increases as the difference value increases.

  According to the present invention, the larger the difference value between the target value of each of color temperature and illuminance and the detected value of each of color temperature and illuminance by the measuring instrument, the smaller the correction coefficient by which the difference value is multiplied. Color temperature and illuminance can be prevented from overshooting or undershooting with respect to the target value, and the difference between the color temperature and illuminance is within the permissible range. Since the time can be shortened, the light color desired by the user can be obtained in a shorter time than in the past.

  According to a second aspect of the present invention, in the first aspect of the invention, the control device individually sets a correction coefficient used for correcting the color temperature instruction value and a correction coefficient used for correcting the illuminance instruction value. It is characterized by that.

  According to this invention, compared with the case where the magnitude of the correction coefficient used for correcting the color temperature instruction value and the magnitude of the correction coefficient used for correcting the illuminance instruction value are the same, each color temperature and illuminance are more appropriate. A correct correction value can be obtained.

  The invention of claim 3 is characterized in that, in the invention of claim 1, the control device widens the allowable range of the difference values of the color temperature and the illuminance as the target values of the color temperature and the illuminance are larger.

  According to the present invention, it is possible to prevent the allowable range of the difference value between the color temperature and the illuminance from becoming unnecessarily narrow as the target values of the color temperature and the illuminance are increased. When the target value is large, it is possible to shorten the time until the difference value between the color temperature and the illuminance falls within the allowable range.

  According to a fourth aspect of the invention, in the third aspect of the invention, the control device makes the allowable range of the difference value of illuminance wider than the allowable range of the difference value of the color temperature.

  According to the present invention, since the allowable range of the difference value is widened for the illuminance in which the detection value is likely to vary depending on the arrangement position of the measuring instrument, the degree of freedom of the arrangement position of the measuring instrument is increased.

  The invention of claim 5 is the invention of claim 1 to claim 4, comprising a plurality of lighting fixtures and load control means for individually turning on / off each lighting fixture. When the difference value of the illuminance in the lighted state exceeds the upper limit of the allowable range and does not converge, some of the lighting fixtures are individually turned off by the load control means.

  According to this invention, when the difference value of the illuminance in a state where all the luminaires are lit exceeds the upper limit of the allowable range and does not converge, the difference value of the illuminance by the measuring instrument is appropriately turned off by appropriately turning off some of the luminaires. Can be converged within an allowable range, and the illuminance can be adjusted over a wider range.

  According to a sixth aspect of the present invention, in the first to fifth aspects of the present invention, the plurality of measuring instruments are arranged apart from each other in the illumination space, and the subtracting means is a difference between the color temperature and the illuminance obtained for each measuring instrument. The sum of values obtained by multiplying the value by a weighting factor determined according to the arrangement position of the measuring instrument is given to the correction value calculation means as a difference value between the color temperature and illuminance.

  According to the present invention, it is possible to reduce variations in color temperature and illuminance due to indoor locations where a plurality of lighting fixtures are arranged.

  The invention of claim 7 is the invention of claim 1 to claim 5, comprising a plurality of lighting fixtures, a plurality of measuring instruments being arranged apart from each other in the lighting space, and the control device comprising: A dimming signal is generated for each lighting fixture based on the correspondence with the arrangement position of the measuring instrument.

  According to the present invention, it is possible to reduce variations in color temperature and illuminance due to indoor locations where a plurality of lighting fixtures are arranged.

  According to the first aspect of the invention, there is an effect that the light color desired by the user can be obtained in a shorter time than in the prior art.

(Embodiment 1)
As illustrated in FIG. 1A, the lighting device according to the present embodiment includes a plurality of (two in the illustrated example) lighting fixtures 1 that can adjust the light color of light applied to the lighting space. In addition, each lighting fixture 1 is arrange | positioned at an indoor ceiling.

  As shown in FIG. 1B, each lighting fixture 1 includes a light source La composed of a fluorescent lamp having a color temperature of 3000K and a light color of a light bulb, and a light source composed of a fluorescent lamp having a color temperature of 6500K and a light color of daylight. Lb and lighting devices 11a and 11b composed of inverter circuits for lighting two types of light sources La and Lb, respectively. Each lighting device 11a, 11b is powered by a power source such as a commercial power source.

  The lighting devices 11a and 11b can continuously change the power supplied to the light sources La and Lb in accordance with a dimming signal (control signal) given from the controller 2. Therefore, the light color of the mixed light obtained by the lighting fixture 1 is adjusted by changing the dimming signal applied from the controller 2 to the lighting devices 11a and 11b to change the ratio of the light output of each of the light sources La and Lb. Can do.

  The controller 2 includes a setting unit for setting target values for color temperature and illuminance when the user wants to obtain a desired light color, and target values for color temperature and illuminance set by operation of the setting unit. Is used as an instruction value to set the light output (light quantity) of each of the light sources La and Lb, and the adjustment for setting the light output of each of the light sources La and Lb to be turned on by the light output of each of the light sources La and Lb. A dimming signal generation unit configured to generate an optical signal and transmit it to each of the lighting devices 11a and 11b. Here, the calculation unit may calculate the light output of each of the light sources La and Lb each time the color temperature and illuminance instruction values are given, or each light source corresponding to the color temperature and illuminance instruction values. You may make it read from the memory | storage part which memorize | stored beforehand the combination of the optical output of La and Lb. In the present embodiment, the controller 2 constitutes a control device that generates dimming signals to be given to the lighting devices 11a and 11b using the target values of the color temperature and illuminance as instruction values.

  Further, in the lighting device of the present embodiment, the measuring device 3 that detects the color temperature and illuminance of the mixed color light obtained by the lighting fixture 1 is provided on the lower surface of the lighting fixture 1, and the color temperature and the illuminance are detected by the measuring device 3. The value is sent to the controller 2, but if the measuring instrument 3 can detect the color temperature and illuminance of the mixed color light obtained by the lighting fixture 1, the measuring instrument 3 is arranged on the indoor floor or work surface. It may be used.

  The controller 2 includes a light output setting means for setting the light output of each of the light sources La and Lb based on the instruction values of the color temperature and the illuminance and supplying the light output to the dimming signal generation unit, the color temperature and the controller 2 Subtracting means for subtracting subtracted values obtained by subtracting the detected values of the color temperature and illuminance by the measuring instrument 3 from the respective target values of illuminance (difference values between the target value and the detected value for each of the color temperature and illuminance), Correction value calculating means for separately obtaining a correction value obtained by multiplying each of the subtracted value of the color temperature and the subtracted value of the illuminance obtained by the correction coefficient. In the light output setting means, the color temperature and illuminance are set by the setting unit. When each target value is set, first, the light output of each light source La, Lb is set using the target values of color temperature and illuminance as instruction values, and then the color obtained by the correction value calculation means Degree and illumination light sources La respective values obtained by adding the correction value to the previous instruction values of color temperature and intensity as a new instruction value, so as to set the optical output of Lb. In short, the light output setting means corrects the indication values of the color temperature and the illuminance so that the difference value, which is the subtraction value of the color temperature and the illuminance obtained by the subtraction means, falls within the allowable range, and each light source La, Set the light output of Lb. In the present embodiment, the dimming signal generation unit constitutes a dimming signal generation unit.

  Here, when the user sets the target values of the color temperature and the illuminance by the setting unit, the controller 2 first uses the light output setting means to set the target values of the color temperature and the illuminance as the instruction values. The light output corresponding to each lighting fixture 1 is generated by generating a dimming signal for obtaining the light output of each of the light sources La and Lb set by the light output setting means in the dimming signal generation unit. 11a and 11b. Thereafter, a subtraction value obtained by subtracting the detection value of each of the color temperature and illuminance by the measuring instrument 3 from the target value for each of the color temperature and illuminance is obtained by the subtraction means, and a correction coefficient is calculated for each subtraction value by the correction value calculation means. A correction value obtained by multiplication is obtained, and a value obtained by adding the correction values of the color temperature and illuminance obtained by the correction value calculation means to the previous instruction values of the color temperature and illuminance is used as a new instruction value. The light output of Lb is obtained, and a dimming signal is newly generated by the dimming signal generation unit and transmitted to each lighting fixture 1. In such a series of processes in the controller 2, the subtracted values of the color temperature and the illuminance fall within the allowable range (that is, the detected values of the color temperature and the illuminance fall within the target range centered on the target value). Repeat until.

  For example, when the user sets the color temperature and illuminance to, for example, 5000 [K] and 1000 [lx] in the setting unit, the actual color temperature and illuminance may vary depending on the light fluxes of the light sources La and Lb and the light color. Are not 5000 [K] and 1000 [lx], but the detected values of the color temperature and illuminance by the measuring instrument 3 are 4800 [K] and 800 [lx].

  In such a case, the subtracted values obtained by subtracting the detection values from the target values of the color temperature and the illuminance are 200 [K] and 200 [lx], respectively. If each correction coefficient is 1, the color temperature and the illuminance are assumed. The respective correction values are 200 [K] and 200 [lx]. In the light output calculation means, the target values of the color temperature and the illuminance are 5000 [K] and 1000 [lx], respectively, and the correction values are 200 [K]. , 200 [lx] is added, and 5200 [K] and 1200 [lx] are used as instruction values, and the light outputs of the light sources La and Lb are obtained, and the dimming signal generated by the dimming signal generator based on the light outputs is obtained. An optical signal is transmitted to the luminaire 1. Thereafter, if the detected values of the color temperature and illuminance by the measuring device 3 are 5100 [K] and 950 [lx], the values obtained by subtracting the detected values from the target values for the color temperature and illuminance are -100 [K], respectively. Therefore, if the correction coefficient is 1, 5100 [K] obtained by adding −100 [K] and 50 [lx] to 5200 [K] and 1200 [lx] which are the previous instruction values. The light output of each of the light sources La and Lb is obtained using 1250 [lx] as a new instruction value, and the dimming signal generated by the dimming signal generation unit based on the light output is transmitted to the luminaire 1. The Such correction of the instruction value is repeated until the subtracted values of the color temperature and the illuminance fall within the respective allowable ranges.

  However, when the correction coefficient is set to 1 and the subtraction value obtained by subtracting the detection value from the target value is used as the correction value as it is, the sign of the subtraction value is inverted before and after the correction of the instruction value. The detected values of color temperature and illuminance repeatedly vibrate above and below the target range, and the subtracted values of color temperature and illuminance do not converge within the respective allowable ranges or until they converge within the allowable ranges. The time will be longer. If the actual color temperature and illuminance obtained by the lighting fixture 1 vibrate, the user in the lighting space by the lighting fixture 1 may feel uncomfortable.

  Therefore, the controller 2 of the lighting device of the present embodiment corrects and adjusts the indication values of the color temperature and the illuminance so that the subtraction values of the color temperature and the illuminance obtained by the subtracting means are within the respective allowable ranges. When generating an optical signal, each correction coefficient used in the correction value calculation means is made smaller as the subtracted values of the color temperature and illuminance are larger, so that the color temperature and illuminance are not vibrated and can be allowed in a short time. Converge within the range. In other words, the greater the absolute value of the subtraction value for each of color temperature and illuminance, the more likely the detected value will overshoot or undershoot with the correction of the indicated value. Decrease the coefficient.

  As an example, when the allowable range of the subtraction value of color temperature is ± 99 [K] (that is, the target range is the target value ± 99 [K]) and the absolute value of the subtraction value is ΔTc [K], ΔTc is 100 ≦ The correction coefficient is changed in the first outer range of ΔTc <200, in the second outer range of 200 ≦ ΔTc <500, and in the third outer range of 500 ≦ ΔTc <800, If it is in the first outer range, the correction coefficient is 1. If it is in the second outer range, the correction coefficient is 0.8. If it is in the third outer range, the correction coefficient is 0.6. . In the present embodiment, since the correction coefficient is appropriately changed as described above, for example, when the target value of the color temperature is set to 5000 [K], the detected value of the color temperature is 4900 [K]. In this case, ΔTc is 100 [K], which is within the first outer range, so that the correction value is set to 1 and the indicated value is corrected to 5100 [K], and the detected color temperature value is 4800 [K]. In this case, ΔTc is 200 [K] and is within the second outer range, so that the correction value is set to 0.8, the indicated value is corrected to 5160 [K], and the detected color temperature value is 4500 [K]. When K], ΔTc is 500 [K], which is within the third outer range, so the correction value is set to 0.6 and the indicated value is corrected to 5300 [K]. In addition, what is necessary is just to set suitably the value of the correction coefficient matched with the tolerance | permissible_range regarding a subtraction value of color temperature, each outer range, and each outer range.

  Therefore, in the illumination device of the present embodiment, the larger the difference value, which is the subtraction value between the color temperature target value and the color temperature detection value by the measuring instrument 3, is the smaller the correction coefficient to be multiplied by the difference value. It is possible to prevent the color temperature detected by the device 3 from overshooting or undershooting with respect to the target range and oscillating, and until the difference value of the color temperature falls within the allowable range of the color temperature. It is possible to shorten the time.

In the above example, the absolute value of the color temperature is described. However, the difference in the color temperature is the difference of the reciprocal of the color temperature (the unit of the value obtained by multiplying the reciprocal of the color temperature by 10 ⁶ is called mired). (Even if the color temperature is low, the change in light color is large when the color temperature is low, and the change in light color is small when the color temperature is high). You may make it set the tolerance | permissible_range of a difference value, each outer range, and a correction value using the reciprocal number of color temperature.

  Further, the fact that the change in the color temperature is sensed at equal intervals due to the difference in the reciprocal of the color temperature means that, for example, the difference value of the color temperature between the case where the target value of the color temperature is 3000 [K] and 6500 [K]. If the feedback control is performed with the same allowable range, the accuracy will be different. Therefore, by changing the permissible range so that the permissible range of the difference value of the color temperature becomes wider as the target value of the color temperature is larger, the color temperature is adjusted within the permissible range of the same level for the user. You will feel that you are. In addition, by increasing the allowable range of the color temperature difference value as the target value of the color temperature increases, the allowable range of the differential value of the color temperature is prevented from becoming unnecessarily narrow as the target value of the color temperature increases. It is possible to shorten the time until the difference value of the color temperature falls within the allowable range when the target value of the color temperature is large.

  As a specific example, for example, the allowable range of the difference value of the color temperature when the target value of the color temperature is 3000 [K] is ± 50 [K] (that is, the target range of the color temperature is 3000 ± 50 [K]). In this case, the allowable range of the difference value of the color temperature when the target value of the color temperature is 6500 [K] is ± 100 [K] (that is, the target range of the color temperature is 6500 ± 100 [K]). do it. The allowable range may be changed continuously as the color temperature increases, or may be increased stepwise.

  The correction of the illuminance instruction value may be considered in the same manner as the correction of the color temperature instruction value. For example, an allowable range of a subtraction value (difference value) obtained by subtracting the detection value obtained by the measuring instrument 3 from the illuminance target value is set. When ± 49 [lx] and the absolute value of the subtraction value is ΔE [lx], when ΔE is in the first outer range of 50 ≦ ΔE <200, the second outer range of 200 ≦ ΔE ≦ 400 is set. The correction coefficient may be changed depending on the case, and the correction coefficient may be set to 1 when the correction coefficient is within the first outer range, and may be set to 0.8 when the correction coefficient is within the second outer range. Therefore, for example, when the target value of illuminance is set to 1000 [lx], when the detected value of illuminance is 900 [lx], ΔE becomes 100 [lx] and the first outer range Therefore, when the correction value is 1 and the indicated value is corrected to 1100 [lx], and the detected value of illuminance is 800 [lx], ΔE becomes 200 [lx] and is within the second outer range. Therefore, the correction value is set to 0.8, and the indicated value is corrected to 1160 [lx]. In addition, what is necessary is just to set suitably the value of the correction coefficient matched with the tolerance | permissible_range regarding the difference value of illumination intensity, each outer range, and each outer range.

  Thus, in the illumination device of the present embodiment, the larger the difference value, which is the subtraction value between the target illuminance value and the detected illuminance value by the measuring instrument 3, the smaller the correction coefficient to be multiplied by the differential value. It is possible to prevent the detected illuminance from overshooting or undershooting the target range and vibrating, and shorten the time until the difference value of illuminance falls within the allowable illuminance range. It becomes possible. In addition, by increasing the allowable range of the illuminance difference value as the illuminance target value increases, it is possible to prevent the allowable range of the illuminance difference value from becoming unnecessarily narrow as the illuminance target value increases. Thus, when the target value of illuminance is large, the time until the difference value of illuminance falls within the allowable range can be shortened.

  In the present embodiment, control is performed using the detected value of illuminance. For example, when a dimming signal for turning on each of the light sources La and Lb at 100% is transmitted to the luminaire 1, 1000 [lx]. If it is known that the illuminance can be obtained, the correction amount of the indicated value may be changed by the difference value between the target value of the dimming ratio and the dimming ratio corresponding to the detected value of illuminance. For example, if the difference value of the dimming ratio is within 5%, the instruction value of the dimming ratio is not corrected, and if it is larger than 5% and smaller than 10%, the instruction value is corrected with a correction coefficient of 0.8. If it is 10% or more, the instruction value may be corrected by setting the correction coefficient to 0.6.

  By the way, when the color temperature and the illuminance are brought close to the respective target values at the same time, the feedback control regarding the color temperature and the feedback control regarding the illuminance are simultaneously performed. For example, when the target values of color temperature and illuminance are set to 5000 [K] and 1000 [lx], the detected values of the color temperature and illuminance by the measuring instrument 3 are 5300 [K] and 800 [lx], respectively. Assuming that the subtraction values obtained by subtracting the detection values of the color temperature and the illuminance from the target values of the color temperature and the illuminance are −300 [K] and 200 [lx], the correction coefficient for the color temperature is set to 0.8. As a result, the correction value becomes −240 [K] and the instruction value is corrected to 4760 [K], while the illuminance is set to 160 [K] when the correction coefficient is set to 0.8. The value is corrected to 1160 [lx]. Therefore, the controller 2 obtains the light output of each of the light sources La and Lb with the indication values of the color temperature and the illuminance as 4760 [K] and 1160 [lx], and the dimming signal generation unit newly adds the dimming signal. Is generated and transmitted to each luminaire 1. Such correction of the instruction value is repeated until the subtracted values of the color temperature and the illuminance fall within the respective allowable ranges. Here, in the controller 2, the magnitude of the correction coefficient used for correcting the color temperature instruction value and the magnitude of the correction coefficient used for correcting the illuminance instruction value are individually set. As compared with the case where the magnitude of the correction coefficient used is the same as the magnitude of the correction coefficient used for correcting the illuminance instruction value, it is possible to obtain more appropriate correction values for the color temperature and the illuminance.

  As described above, when feedback control is performed to bring the color temperature and illuminance close to each target value at the same time, the color temperature and illuminance do not converge at the same time depending on the combination conditions of the color temperature target value and the illuminance target value. Sometimes. Therefore, when performing feedback control to bring the color temperature and illuminance close to the target values at the same time, priorities are set in advance for the color temperature and illuminance, and the higher priority converges within the allowable range and the priority If the lower one does not converge within the allowable range, the lower priority range may be expanded, and the lower priority range may be converged within the expanded allowable range. Further, without assigning priorities, when one converges to the allowable range and the other does not converge to the allowable range, the other allowable range may be expanded and converged. For example, the target values for the color temperature and illuminance are set to 5000 [K] and 1000 [lx], and the allowable ranges of the subtraction values for the color temperature and illuminance are set to ± 25 [K] and ± 25 [lx]. The subtracted value obtained by subtracting the detected value from the target value of the target converges within the allowable range of the subtracted value, but the subtracted value obtained by subtracting the detected value from the target value of the illuminance converges within the allowable range of the subtracted value. If not, the allowable range of the subtraction value of illuminance may be converged by extending to ± 50 [lx], and the correction of the instruction value may be terminated.

  In the illuminating device of this embodiment described above, the correction coefficient to be multiplied by the difference value becomes smaller as the difference value between the target value of the color temperature and illuminance and the detected value of the color temperature and illuminance by the measuring device 3 is larger. It is possible to prevent the color temperature and illuminance detected by the measuring instrument 3 from vibrating due to overshooting or undershooting with respect to the target value. Since it is possible to shorten the time required to enter the allowable range, the light color desired by the user can be obtained in a shorter time than in the past.

  Here, the illuminance in the room illuminated by each luminaire 1 varies greatly depending on the location, and the detected value varies depending on the arrangement position of the measuring instrument 3, so that the allowable range of the difference value of the illuminance is the allowable range of the difference value of the color temperature. It is desirable to make it wider, and by increasing the allowable range of the difference value for the illuminance in which the detection value easily varies depending on the arrangement position of the measuring instrument 3, the degree of freedom of the arrangement position of the measuring instrument 3 is increased.

(Embodiment 2)
The basic configuration of the lighting device of the present embodiment is substantially the same as that of the first embodiment. As shown in FIG. 2, each lighting fixture 1 is a light source, the light emission color is a red light source LR, and the light emission color is a green light source. LG is different from light source LB whose emission color is blue, that is, light sources LR, LG, and LB of three primary colors. Each lighting fixture 1 includes a lighting circuit (not shown) corresponding to each light source LR, LG, LB. Each lighting circuit receives a dimming signal provided from the controller 2 and receives each light source LR, LG, LB is dimmed. That is, by adjusting the ratio of the light output of each of the light sources LR, LG, and LB, it is possible to obtain a desired mixed color light, and therefore, it is possible to adjust a subtle hue compared to the first embodiment. That is, in the illumination device described in the first embodiment, the color can be changed only in the range between the light colors of the two types of light sources La and Lb on the (x, y) chromaticity diagram. Although it is not possible to adjust the color tone, as in the present embodiment, when three types of light sources LR, LG, and LB of red, green, and blue are used as shown in the present embodiment, each color is shown on the (x, y) chromaticity diagram. The color is freely changed inside the triangle formed in the (x, y) chromaticity diagram (within the range connecting the three xy coordinates) by the (x, y) chromaticity of the emission colors of the light sources LR, LG, LB. You can adjust the subtle shades.

  The correction of the instruction values for the color temperature and illuminance is performed in the same manner as in the first embodiment. However, instead of the color temperature, the target value of (x, y) chromaticity is set and measured, and (x, y y) Feedback control may be performed to correct the instruction value of (x, y) chromaticity based on the difference value between the target value of chromaticity and the detected value.

(Embodiment 3)
The basic configuration of the lighting device of the present embodiment is substantially the same as that of the first embodiment. In the first embodiment, the control signal (dimming signal) is individually given from the controller 2 to each lighting fixture 1. In the present embodiment, as shown in FIG. 3, the lighting fixtures 1 are connected by a feed wiring, and the control signal (dimming signal) given from the controller 2 to each lighting fixture 1 is the same, A difference is that a load control unit 4 serving as a load control unit that individually turns on and off the fixture 1 is provided, and that the controller 2 individually turns on and off each lighting fixture 1 by the load control unit 4. The controller 2 and each lighting fixture 1 are supplied with power from a commercial power source AC. In addition, the load control unit 4 has a configuration including a plurality of switch elements inserted between the commercial power supply AC and the lighting device of each lighting fixture 1 so that each switch element can be individually controlled by the controller 2. You can do it.

  By the way, in the illuminating device of Embodiment 1, depending on the target values of the color temperature and the illuminance, even if the difference value between the target value of the color temperature and the detected value converges within an allowable range, the target value and detected value of the illuminance. May not converge within the allowable range.

  On the other hand, in this embodiment, since each lighting fixture 1 can be turned on / off individually, it is possible to finely adjust the illuminance, and the controller 2 allows the illuminance when all the lighting fixtures 1 are lit. Since the load control unit 4 individually turns off some of the lighting fixtures 1 when the difference value exceeds the upper limit of the allowable range, the illuminance difference value by the measuring instrument 3 can be converged within the allowable range. It becomes possible, and it becomes possible to adjust illuminance over a wider range. For example, when a user sets a target value of illuminance to 500 [lx] in a room where ten lighting fixtures 1 connected to one controller 2 are arranged, the feedback control described in the first embodiment. Suppose that the detected value of illuminance by the measuring instrument 3 can only be reduced to 550 [lx] even if the above is performed. On the other hand, in this embodiment, the controller 2 turns off the two luminaires 1 with the load control unit 4, for example, so that the difference value between the target value of the illuminance and the detected value is within an allowable range (for example, ± 25 [Lx]). Here, as the two lighting fixtures 1 to be turned off, the lighting fixture 1 (for example, the lighting fixture 1 arranged in the center of the room) having a relatively large influence on the detection value of the illuminance by the measuring instrument 3 is selected. Accordingly, the difference value between the target value of the illuminance and the detected value can be converged within the allowable range earlier, but depending on the shape of the room and the layout of the luminaire 1 (arrangement position of the luminaire 1). The lighting fixture 1 may be turned off before the start of feedback control.

  Here, in the case where five lighting fixtures 1 are turned off before the feedback control is started in the same room, the five lighting fixtures are set regardless of the user setting the target value of illuminance to 3000 [lx]. 1, even if each lighting fixture 1 is turned on at a dimming level of 100%, it is assumed that the detected value of illuminance by the measuring instrument 3 can be obtained only up to 1500 [lx]. In such a case, the controller 2 turns on the remaining five luminaires 1 with the load control unit 4 so that the difference value between the target value and the detected value of the illuminance is within an allowable range (for example, ± 25 [lx ]). In short, in the present embodiment, the illuminance can be adjusted over a wider range.

(Embodiment 4)
The basic configuration of the illumination device of the present embodiment is substantially the same as that of the first embodiment. As shown in FIG. 4, a plurality of measuring instruments 3 are connected to the controller 2, and the controller 2 detects each measuring instrument 3. The difference is that the instruction value is corrected based on the value. Here, in the present embodiment, five measuring instruments 3 are provided, and as shown in FIG. 5, the measuring instruments 3 are arranged near the center and near the four corners of the room 10 (parallel to the floor of the room 10). The measuring instruments 3 are arranged in the center and in the vicinity of the four corners in a simple plane). The measuring instrument 3 may be arranged on the floor surface or work surface.

  When the target values of the color temperature and the illuminance are set to 5000 [K] and 1000 [lx], for example, the controller 2 detects the detected value of the measuring instrument 3 at the center of the room 10 as 5200 [K], 1100 [ lx], the detection values of the measuring instrument 3 near the four corners of the room 10 are 5100 [K] and 1000 [lx] in the upper left measuring instrument 3 in FIG. 6, and the detected value of the measuring instrument 3 in the upper right in FIG. [K], 950 [lx], the detection value of the lower left measuring instrument 3 in the figure is 5000 [K], 1050 [lx], the detection value of the lower right measuring instrument 3 in the same figure is 5150 [K], 1100 It is assumed that [lx]. Here, although the detected values of the color temperature and illuminance of the five measuring instruments 3 are different, the measuring instrument 3 in the center of the room 10 receives the most light from the lighting fixture 1 and represents the room 10. It is considered close to the value. Therefore, in this embodiment, a difference value between the detection values of the color temperature and the illuminance by the measuring device 3 is obtained from the target values of the color temperature and the illuminance for each measuring device 3, and the color temperature and the illuminance obtained for each measuring device 3 are obtained. The sum of values obtained by multiplying the difference value by a weighting factor determined in advance according to the arrangement position of the measuring instrument 3 is given to the correction value calculation means as a difference value between the color temperature and the illuminance. As an example, if the weighting coefficient is 0.6 for the measuring instrument 3 in the center of the room 10 and the weighting coefficient for each measuring instrument 3 near the four corners of the room 10 is 0.1, the correction value calculation means is given. The difference value of the color temperature is (5000-5200) × 0.6 + (5000-5100) × 0.1 + (5000-5300) × 0.1 + (5000-5000) × 0.1 + (5000-5150) × 0 .1 = −175 [K], and the difference value of the illuminance is (1000-1100) × 0.6 + (1000−1000) × 0.1 + (1000−950) × 0.1 + (1000−1050) × 0 1+ (1000-1100) × 0.1 = −70 [lx]. Therefore, since the correction coefficient for obtaining the correction value described in the first embodiment is 1 for both the color temperature and the illuminance, the indication values for the color temperature and the illuminance are 4825 [K] and 930 [lx], respectively. It becomes.

  Thus, in the illumination device of the present embodiment, the plurality of measuring instruments 3 are arranged apart from each other in the illumination space, and the color temperature and the illuminance obtained for each measuring instrument 3 by the subtracting means described in the first embodiment. The total sum of the values obtained by multiplying the difference value by the weighting coefficient determined according to the arrangement position of the measuring instrument 3 is given to the correction value calculation means as the difference values of the color temperature and the illuminance, so that only one measuring instrument 3 is used. Compared with the case where it exists, it becomes possible to make small dispersion | variation in color temperature and illumination intensity by the indoor location where the several lighting fixture 1 is arrange | positioned.

(Embodiment 5)
The basic configuration of the lighting device of the present embodiment is substantially the same as that of the fourth embodiment, except that the controller 2 can transmit different dimming signals for each lighting fixture 1.

  Hereinafter, in order to simplify the explanation, as shown in FIG. 6, nine lighting fixtures 1 are arranged in a room 10 and five measuring instruments 3 are arranged, and these are connected to the controller 2. Explain that it is. Here, nine lighting fixtures 1 are arranged in a 3 × 3 matrix on the ceiling surface of the room 10, and the measuring instrument 3 is a floor surface or work surface near the center and the four corners of the room 10 as in the fourth embodiment. Is arranged. Note that the number of lighting fixtures 1 and the number of measuring instruments 3 are not particularly limited, and these numbers may be set as appropriate depending on the size of the room 10.

  When the target values of the color temperature and the illuminance are set to 5000 [K] and 1000 [lx], for example, the controller 2 detects the detected value of the measuring instrument 3 at the center of the room 10 as 5200 [K], 1100 [ lx], the detected values of the measuring instrument 3 near the four corners of the room 10 are 5100 [K] and 900 [lx] in the upper left measuring instrument 3 in FIG. 6, and the detected value of the measuring instrument 3 in the upper right in FIG. [K], 950 [lx], detection values of the lower left measuring instrument 3 in the figure are 5000 [K], 1000 [lx], and detection values of the lower right measuring instrument 3 in the figure are 4950 [K], 1000 It is assumed that [lx]. From this result, since the color temperature is high and the illuminance is high in the center of the room 10, the color temperature of the light emitted from the lighting fixture 1 is higher than the target value, and the illuminance is also higher than the target value. You can see that However, the detection value obtained by the measuring instrument 3 arranged in the vicinity of the four corners of the room 10 is affected by the wall and the like, and the color temperature and the illuminance are generally low. Such a result was obtained because the wall color of the room 10 is a red color, the blue color light, which is the main component of the high color temperature, is absorbed by the wall, and the reflectance of the wall surface is low. This is probably because a relatively large amount of light was absorbed by the wall.

  As in the first embodiment, the controller 2 in the present embodiment uses a target value for each of color temperature and illuminance and a detected value for each of color temperature and illuminance by the measuring instrument 3 for each lighting fixture 1. Is repeated until the difference values of the color temperature and the illuminance for all the measuring instruments 3 fall within the allowable range. Here, when the controller 2 generates a dimming signal to be given to each lighting fixture 1, which measurement device 3 uses the detected value, the correspondence between the placement position of the lighting fixture 1 and the placement position of the measurement device 3. It is preset based on Therefore, when the measurement result as described above is obtained, a dimming signal that reduces the color temperature and illuminance is given to the lighting device 1 in the center of the room 10, and the surrounding lighting device 1 has a color. A dimming signal that increases the temperature (in addition to the color temperature, the illuminance is also increased for the luminaire 1 close to the measuring instrument 3 whose detected illuminance value is lower than the target value) can be provided. . The dimming signal for the luminaire 1 in the center of the room 10 is generated using the detection value of the measuring instrument 3 arranged in the center of the room 10, and new instructions for color temperature and illuminance are provided. A dimming signal corresponding to the light output of each of the light sources La and Lb obtained with values of 4800 [K] and 900 [lx] is transmitted.

  Thus, in the lighting device of the present embodiment, it is possible to reduce variations in color temperature and illuminance depending on the indoor location where the plurality of lighting fixtures 1 are arranged.

Embodiment 1 is shown, (a) is a schematic block diagram, (b) is a principal part explanatory drawing. FIG. 5 is a schematic configuration diagram showing a second embodiment. FIG. 6 is a schematic configuration diagram showing a third embodiment. FIG. 6 is a schematic configuration diagram showing a fourth embodiment. It is explanatory drawing of the arrangement position of the measuring device in the same as the above. It is explanatory drawing of the arrangement position of the lighting fixture in Embodiment 5, and a measuring device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lighting fixture 2 Controller 11a, 11b Lighting device La, Lb Light source

Claims (7)

  A lighting device having a plurality of light sources having different light colors and a plurality of lighting devices for receiving light control signals and controlling the light output of each light source, and providing each lighting device with target values of color temperature and illuminance as instruction values A control device that generates a dimming signal, and a measuring instrument that detects the color temperature and illuminance obtained by the luminaire, and the control device includes light of each light source set based on the indicated values of the color temperature and illuminance. A dimming signal generating means for generating a dimming signal for obtaining an output, and a subtracting means for separately obtaining a difference value between a target value of each of color temperature and illuminance and a detection value of each of color temperature and illuminance by a measuring instrument; Correction value calculation means for separately obtaining a correction value obtained by multiplying each of the difference value of color temperature and the difference value of illuminance obtained by the subtraction means by a correction coefficient, and the difference value of each of color temperature and illuminance When setting the light output of each light source by correcting the indicated values of the color temperature and the illuminance with the correction values so that they are within the allowable range, the respective correction coefficients used in the correction value calculating means are respectively set to the color temperature and the illuminance. The illumination device is characterized in that the larger the difference value, the smaller.   The lighting device according to claim 1, wherein the control device individually sets a correction coefficient used for correcting the color temperature instruction value and a correction coefficient used for correcting the illuminance instruction value.   The lighting device according to claim 1, wherein the control device widens the allowable range of the difference value between the color temperature and the illuminance as the target value for each of the color temperature and the illuminance increases.   The lighting device according to claim 3, wherein the control device makes the allowable range of the difference value of illuminance wider than the allowable range of the difference value of the color temperature.   A plurality of lighting fixtures and load control means for individually lighting / extinguishing each lighting fixture are provided, and the control device does not converge with the difference value of the illuminance exceeding the upper limit of the allowable range when all the lighting fixtures are turned on. The lighting device according to any one of claims 1 to 4, wherein some of the lighting fixtures are turned off individually by the load control means.   A plurality of measuring instruments are arranged apart from each other in the illumination space, and the subtracting means is a value obtained by multiplying the difference value of each color temperature and illuminance obtained for each measuring instrument by a weighting factor determined according to the arrangement position of the measuring instrument. The lighting device according to claim 1, wherein the sum of the values is given to the correction value calculation means as a difference value between the color temperature and the illuminance.   A plurality of lighting fixtures are provided, and a plurality of measuring instruments are arranged apart from each other in the lighting space, and the control device adjusts each lighting fixture based on the correspondence between the lighting fixture placement position and the measuring device placement position. The lighting device according to claim 1, wherein the lighting device generates an optical signal.

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