JP2014170680A - Illumination control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform mixing colors and lighting control.SOLUTION: A lighting control device 1 determines a lighting control level Lx of a low color temperature light source 20 and a lighting control level Ly of a high color temperature light source 21 on the basis of a brightness target value W and a color temperature target value Z which received on an operation unit 11. Therefore, compared to a conventional manner in which a worker performs the mixing colors and the lighting control while manually adjusting the lighting control level of the respective light sources 20 and 21, the lighting control device 1 easily performs mixing colors and lighting control.

Description

  The present invention relates to a lighting control device.

  Conventionally, for example, there is a light control device described in Japanese Patent Application Laid-Open No. 2004-133260 that individually adjusts a plurality of types of light sources having different light colors (color temperatures). The dimming device described in Patent Document 1 includes a circuit system for dimming and lighting an incandescent lamp by phase angle control, and a circuit system for dimming and lighting a fluorescent lamp by a dimming signal.

  As described above, multiple types of light sources (incandescent lamps and fluorescent lamps) with different color temperatures are dimmed individually, and light from each light source is applied to a common illumination space. ) Can be changed (toned).

JP 2011-154839 A

  However, when the operator performs toning, in the conventional example described in Patent Document 1, it is necessary to adjust to the target light color while adjusting the dimming levels of the two types of light sources. Moreover, since the color adjustment and the light adjustment are not linked, it is difficult to adjust (light control) only the brightness while keeping the light color constant, for example.

  The present invention has been made in view of the above problems, and an object thereof is to easily perform toning and light control.

  The illumination control device of the present invention adjusts the color temperature and brightness of illumination light that illuminates the illumination space by dimming a plurality of types of light sources that irradiate the illumination space with light of different color temperatures. In the apparatus, the first receiving means for receiving the target value of color temperature, the second receiving means for receiving the target value of brightness, and the target value of color temperature and the second receiving means received by the first receiving means. Control means for determining a dimming level for each of the plurality of types of light sources based on the brightness target value, and the control means adjusts the plurality of types of light sources according to the target value of the color temperature. A light level ratio is calculated, a total light control level of the plurality of types of light sources is determined according to the brightness target value, and a light control level for each light source is determined from the ratio and the total. Composed It is characterized in.

  In this lighting control apparatus, the control means is received by the target value of the color temperature received by the first receiving means and the second receiving means for each of a plurality of lighting apparatuses each having a plurality of types of the light sources. It is preferable that the dimming level for each light source is determined from the brightness target value, and the determined dimming level for each light source is individually instructed to the plurality of lighting devices.

  In this illumination control apparatus, the control means is configured to multiply the sum of the dimming levels by a coefficient, and determine the dimming level for each light source from the sum obtained by multiplying the ratio and the coefficient. The coefficient increases when the target value of the color temperature is equal to or less than a predetermined reference value, decreases when the target value of the color temperature is larger than the reference value, and the slope when increasing is the decrease. It is preferable that it is gentler than the inclination of time.

  In the illumination control device according to the present invention, the control unit is configured to control the dimming level and the high color of the low color temperature light source based on the target value of the color temperature received by the first receiving unit and the target value of the brightness received by the second receiving unit. Since the dimming level of the temperature light source is determined, it is easier to perform toning and dimming compared to the conventional example where the operator performs toning and dimming while manually adjusting the dimming level of each light source. There is an effect that can be.

It is a block diagram which shows embodiment of the illumination control apparatus which concerns on this invention. (a) is a diagram showing the relationship between the color temperature and the ratio in the above, and (b) is a diagram showing the relationship between the color temperature coefficients in the above. It is explanatory drawing for demonstrating the relationship between the illumination intensity and the comfort of color temperature.

  An embodiment of a lighting control device according to the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the illumination control apparatus 1 of the present embodiment includes a control circuit 10, an operation unit 11, a display unit 12, a storage unit 13, a plurality (six in the illustrated example) of signal output units 14, a power supply circuit 15, and the like. Is provided. The control circuit 10 uses the CPU as a main component, and executes various processes to be described later by executing a program stored in a storage element (not shown) by the CPU.

  The operation unit 11 has a plurality of pushbutton switches (not shown), and when the pushbutton switch is pushed, the control circuit 10 receives the color temperature target value and the brightness (illuminance) target value individually. Output to.

  The display unit 12 includes, for example, an LED array (not shown) in which a plurality of LEDs are arranged in a row, and roughly sets the target value of color temperature and the target value of brightness according to the number of LEDs that emit light simultaneously. indicate. However, the display unit 12 may be configured by a liquid crystal display, a 7-segment display, or the like instead of the LED array.

  The storage unit 13 is composed of an electrically rewritable nonvolatile semiconductor memory (flash memory or the like), and stores various data as will be described later.

  The signal output unit 14 generates a dimming signal corresponding to the dimming level instructed from the control circuit 10 and outputs the dimming signal to the lighting circuits 22 and 23 through the signal line 24. The dimming level is expressed as a percentage where the rated light output is 100%. The dimming signal is a signal (so-called duty signal) in which the on-duty ratio takes a value corresponding to the dimming level. The signal output unit 14 decreases the on-duty ratio of the dimming signal as the dimming level decreases.

  The power supply circuit 15 converts AC power supplied from the commercial power system 100 into DC power and supplies power to the units 11 to 14 including the control circuit 10.

  The lighting circuits 22 and 23 include a power conversion circuit and a dimming circuit (both not shown). The power conversion circuit converts AC power supplied from the power system 100 into DC power. For example, the dimming circuit is configured to increase or decrease the magnitude (amplitude) of the output current of the power conversion circuit in proportion to the on-duty ratio of the dimming signal. Alternatively, the dimming circuit may be configured to intermittently operate the power conversion circuit and to change the operation period per unit time of the power conversion circuit in proportion to the on-duty ratio of the dimming signal.

  One lighting circuit 22 supplies DC power to the low color temperature light source 20 for rated lighting and dimming. The other lighting circuit 23 supplies direct-current power to turn on the high color temperature light source 21 with rated lighting and dimming. The low color temperature light source 20 includes a light emitting diode whose light color (color temperature) has a relatively low value (for example, 2280 K <Kelvin>). The high color temperature light source 21 is a light emitting diode having a relatively high color temperature (for example, 8000K). However, any of the light sources 20 and 21 is not limited to a light emitting diode, and may be configured by, for example, an organic EL element.

  In the illustrated example, the low color temperature light source 20 and its lighting circuit 22, and the high color temperature light source 21 and its lighting circuit 23 constitute an illumination device (lighting fixture) 2. Therefore, each lighting device 2 mixes the low color temperature illumination light emitted from the low color temperature light source 20 and the high color temperature illumination light emitted from the high color temperature light source 21, so that The color temperature can be adjusted (toned) in a range from a low color temperature to a high color temperature (for example, 2700K to 5000K).

  Next, an operation when the light control device 1 of the present embodiment performs light control and color adjustment on each lighting device 2 will be described. First, the operator operates the operation unit 11 to input a brightness target value W and a color temperature target value Z. The operation unit 11 receives the brightness target value W and the color temperature target value Z input by the operator, and outputs the target values W and Z to the control circuit 10. However, the tonable range (2700K to 5000K) may be divided into a plurality of channels, and a number assigned to each channel (hereinafter referred to as a color temperature channel) may be used as a target color temperature value. Similarly, a dimmable range (for example, a dimming level of 100% to 5%) is divided into a plurality of channels, and numbers assigned to the respective channels (hereinafter referred to as brightness channels) are brightness target values. It is good.

  Using the function stored in the storage unit 13, the control circuit 10 uses a function β stored in the ratio β of the light control level Lx of the low color temperature light source 20 and the light control level Ly of the high color temperature light source 21 with respect to the target value Z of the color temperature. = Lx / Ly). The function is represented by a curve shown in FIG. 2A, where the horizontal axis is the color temperature (unit: K) and the vertical axis is the ratio β. However, this function is obtained by actually measuring each light control level Lx, Ly and color temperature. When the color temperature target value W is specified by the color temperature channel, a unique ratio is associated with each color temperature channel.

  Subsequently, the control circuit 10 obtains the dimming level Lx of the low color temperature light source 20 and the dimming level Ly of the high color temperature light source 21 from the brightness target value W and the ratio β using the following arithmetic expression. However, Lx + Ly = W.

Lx = {β / (1 + β)} × W, Ly = {1 / (1 + β)} × W
Then, the control circuit 10 converts the dimming level Lx of the low color temperature light source 20 into a dimming signal by the signal output unit 14 and outputs it to the lighting circuit 22, and outputs the dimming level Ly of the high color temperature light source 21 as a signal. The unit 14 converts the light into a dimming signal and outputs it to the lighting circuit 23. Accordingly, the lighting circuit 22 performs dimming lighting of the low color temperature light source 20 at the dimming level Lx, and the lighting circuit 23 performs dimming lighting of the high color temperature light source 21 at the dimming level Ly. The brightness and the color temperature can be made substantially coincident with the respective target values W and Z.

  As described above, the dimming control device 1 according to the present embodiment uses the dimming level Lx and the high color temperature of the low color temperature light source 20 based on the brightness target value W and the color temperature target value Z received by the operation unit 11. The light control level Ly of the light source 21 is determined. Therefore, in the dimming control device 1 according to the present embodiment, the toning and dimming are performed as compared with the conventional example in which the operator performs the toning and dimming while manually adjusting the dimming levels of the light sources 20 and 21. Light can be easily performed.

  By the way, regarding the relationship between color temperature, brightness (illuminance), and comfort, it is comfortable even if it is slightly dark under illumination light with low color temperature, and conversely, if it is too bright, it will feel hot and light with high color temperature The research result that the brighter is more comfortable under light is well known (see FIG. 3). However, even under the illumination light with a high color temperature, if it is too bright, it will feel cold.

  That is, it is not necessary to increase the dimming level Lx of the low color temperature light source 20 to 100% near the lower limit of the toning range, but rather it is possible to improve comfort and save energy by lowering the dimming level Lx. it can. Similarly, it is not necessary to increase the dimming level Ly of the high color temperature light source 21 to 100% even near the upper limit of the toning range, but rather to improve comfort and save energy by lowering the dimming level Ly. Can do.

  Therefore, in the color temperature range (4000K to 4500K) that is considered to be used most frequently, the required brightness is set to 1, and the brightness at a color temperature outside the range is a coefficient α (≦ 1). Is preferably obtained to obtain each light control level Lx, Ly. That is, the control circuit 10 calculates the dimming level Lx of the low color temperature light source 20 and the dimming level Ly of the high color temperature light source 21 from the brightness target value W, the ratio β, and the coefficient α using the following arithmetic expression. Ask.

Lx = {β / (1 + β)} × W × α, Ly = {1 / (1 + β)} × W × α
As shown in FIG. 2B, the coefficient α increases when the color temperature target value Z is less than the above range, decreases when the color temperature target value Z is larger than the above range, and increases. The slope of the hour is set to be gentler than the slope of the decrease.

  If the dimming levels Lx and Ly are determined by multiplying the coefficient α as described above, it is possible to improve comfort and save energy.

  Note that a data table in which the light control levels Lx and Ly previously obtained from the arithmetic expressions are associated with the brightness and color temperature target values W and Z is stored in the storage unit 13, and the control circuit 10 The dimming levels Lx and Ly may be determined with reference to the data table. In this way, the responsiveness can be improved as compared with the case where the control circuit 10 calculates the dimming levels Lx and Ly.

  By the way, the lighting control device 1 of the present embodiment includes three sets of two signal output units 14 that output a dimming signal to the same lighting device 2, and each set (the lighting device 2). Toning and dimming can be performed individually. That is, when the control circuit 10 receives the brightness target value W (W1, W2, W3) and the color temperature target value Z (Z1, Z2, Z3) for each lighting device 2 from the operation unit 11, the control circuit 10 receives them. The target values W and Z are stored in the storage unit 13 in association with each lighting device 2.

  The control circuit 10 reads the brightness target value W and the color temperature target value Z corresponding to each lighting device 2 from the storage unit 13, and performs dimming of the low color temperature light source 20 of each lighting device 2 in the above-described procedure. The level Lx and the dimming level Ly of the high color temperature light source 21 are determined. Then, the control circuit 10 converts the determined dimming levels Lx and Ly into a dimming signal by the signal output unit 14, and outputs the dimming signals to the lighting circuits 22 and 23 of the corresponding lighting device 2, respectively. Therefore, the dimming control device 1 of the present embodiment can dimm and adjust the brightness and color temperature of the three lighting devices 2 individually.

  Note that the color temperatures of the low color temperature light source 20 and the high color temperature light source 21 included in the plurality of illumination devices 2 do not have to be the same, and different combinations may be used for each illumination device 2. However, when the color temperatures of the low color temperature light source 20 and the high color temperature light source 21 included in the plurality of lighting devices 2 are different combinations for each lighting device 2, the storage unit 13 stores functions (colors) corresponding to the combinations. A function for determining the ratio β from the target temperature value is stored.

1 Lighting control device
10 Control circuit (control means)
11 Operation part (first receiving means, second receiving means)
20 Low color temperature light source
21 High color temperature light source

Claims (3)

In an illumination control device that adjusts the color temperature and brightness of illumination light that illuminates the illumination space by dimming a plurality of types of light sources that irradiate the illumination space with light of different color temperatures,
A first receiving unit that receives a target value of color temperature, a second receiving unit that receives a target value of brightness, and the target value of color temperature that is received by the first receiving unit and the brightness that is received by the second receiving unit. Control means for determining a dimming level for each of the plurality of types of light sources based on the target value of
The control means calculates a ratio of dimming levels of the plurality of types of light sources according to the target value of the color temperature, and calculates a sum of dimming levels of the plurality of types of light sources according to the target value of brightness. An illumination control apparatus configured to determine and determine a dimming level for each light source from the ratio and the sum.   The control means includes a target value of the color temperature received by the first receiving means and a target value of the brightness received by the second receiving means for each of a plurality of lighting devices each having a plurality of types of the light sources. The dimming level for each of the light sources is determined, and the determined dimming level for each of the light sources is individually instructed to the plurality of lighting devices. Lighting control device.   The control means is configured to multiply the sum of the dimming levels by a coefficient, and to determine a dimming level for each of the light sources from the sum obtained by multiplying the ratio and the coefficient. It increases when the color temperature target value is below a predetermined reference value, decreases when the color temperature target value is greater than the reference value, and the slope at the time of increase is more gradual than the slope at the time of decrease. The lighting control device according to claim 1, wherein the lighting control device is a lighting control device.

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