JP6991944B2 - Dimming lighting system and dimming toning lighting system - Google Patents

Description

The present invention mainly relates to a dimming lighting system, a dimming toning lighting system, a dimming power supply and a dimming toning power supply used for dimming LED lighting, and particularly to dimming and dimming toning using a PWM method.

As a dimming method for adjusting the brightness of LED lighting, a PWM (Pulse Width Modulation) method for controlling the pulse width of power supplied to an LED is widely used. In this method, the PWM duty is proportional to the power supplied to the LED. PWM is controlled by using analog information called "pulse width", and may be affected by time variation of pulse rise / fall and noise. Therefore, Patent Document 1 describes a method in which the above-mentioned proportional relationship is slightly changed in consideration of the variation of the amplifier, and the on-duty is, for example, 98%, the instrument output is 0%, and the instrument output is 100%. ing.
Dimming can also be done wirelessly. Patent Document 2 describes a method in which a lighting device is controlled from a wireless controller via a communication module, and PWM control is mentioned as an example of a control method from the wireless module to the lighting device.

Further, with the shift to LED lighting, toning lighting that changes the color temperature of lighting has come to be used. As an example of toning control by PWM, Patent Document 3 uses a first LED that emits neutral white light having a color temperature of 5000 K (Kelvin) and a second LED that emits light of a bulb color having a color temperature of 3000 K. , An example of performing color matching using a first PWM signal for color matching and a second PWM signal for color matching having a phase opposite to the first PWM signal for color matching is described.

Japanese Unexamined Patent Publication No. 2014-056781 Japanese Unexamined Patent Publication No. 2013-235837 Japanese Unexamined Patent Publication No. 2014-78405

The first problem is when trying to obtain 0% to 100% as the dimming range of PWM control, especially in the vicinity of 0%, the pulse width error due to the influence of the rise / fall and variation of the pulse width, and eventually the control Instability is likely to occur. Similar control instability occurs when color matching is performed by PWM control.

The second problem is to enable color adjustment control when the color temperature range for color adjustment control and the color temperature range for color adjustment in the light source are different. In particular, when a plurality of light sources having different color temperature ranges that can be toned are used, the same toning control cannot be performed for a plurality of light sources by one toning control.

The present invention comprises a setting terminal for setting a set dimming rate, a first calculation device for calculating a modified dimming rate from the set dimming rate, and the same or similar to the set dimming rate from the modified dimming rate. A lighting control system including a third arithmetic unit that calculates a restored dimming rate, which is a value, a drive circuit, and a light source unit including a light emitting element. The drive circuit is a drive corresponding to the restored dimming rate. It is a lighting control system that supplies an output to the light source unit including the light emitting element.

The present invention includes a setting terminal for setting a set dimming rate, a first calculation device for performing a correction calculation for calculating a correction dimming rate, and a third calculation device for performing a restoration calculation for calculating a restoration dimming rate. In a lighting control system including a drive circuit and a light source unit including a light emitting element, the correction calculation is a calculation for converting the set dimming rate into the modified dimming rate, and the restoration calculation is the correction calculation. It is a calculation to restore the restored dimming rate to the restored dimming rate by a mathematical formula that sets the dimming rate to the same value as the set dimming rate . It is a lighting control system that supplies to the light source unit including the light source.

The present invention has a set dimming rate consisting of a set high color temperature dimming rate and a set low color temperature dimming rate, a modified dimming rate consisting of a modified high color temperature dimming rate and a modified low color temperature dimming rate, and a restored height. It is a lighting control system that calculates the restored dimming rate consisting of the color temperature dimming rate and the restored low color temperature dimming rate, and is the sum of the set high color temperature dimming rate and the set low color temperature dimming rate. A setting terminal that sets the set total dimming rate and the set color temperature, or sets the set high color temperature dimming rate and the set low color temperature dimming rate, and a correction operation for calculating the modified dimming rate. It is provided with a first calculation device for performing a restoration calculation, a third calculation device for performing a restoration calculation for calculating the restoration dimming rate, a drive circuit, and a light source unit including a high color temperature light emitting element and a low color temperature light emitting element . The correction operation is an operation for converting the set dimming rate into the modified dimming rate, and the restoration operation is the restoration adjustment by a mathematical formula that sets the modified dimming rate to the same value as the set dimming rate. The drive circuit is an operation for restoring to a light rate, and the drive circuit is a lighting control system that supplies a drive output corresponding to the restored dimming rate to the light source unit including the light emitting element.

In the present invention, when the value of the set dimming rate is larger than 0% and 10% or less, the modified dimming rate calculated from the set dimming rate may be larger than the set dimming rate. preferable.

In the present invention, the difference between at least one of the modified dimming rates and the corresponding set dimming rate is preferably 20% or less.

In the present invention, it is preferable that the modified dimming rate is expressed by a function obtained by multiplying the corresponding set dimming rate by a coefficient and adding an offset.

In the present invention, it is preferable that the modified dimming rate has a discontinuous difference between the case where the corresponding dimming rate is set to zero and the case where the dimming rate is not zero.

In the present invention, it is preferable that the modified dimming rate is input to the third arithmetic unit as a PWM signal.

In the present invention, it is preferable that the restored dimming rate is output from the third arithmetic unit as a PWM signal.

The present invention has a set dimming rate consisting of a set high color temperature dimming rate and a set low color temperature dimming rate, a modified dimming rate consisting of a modified high color temperature dimming rate and a modified low color temperature dimming rate, and a restored height. It is a lighting control system that calculates the restored dimming rate consisting of the color temperature dimming rate and the restored low color temperature dimming rate, and is the sum of the set high color temperature dimming rate and the set low color temperature dimming rate. Performs a correction operation to calculate the correction dimming rate with a setting terminal that sets the set total dimming rate and the set color temperature, or sets the set high color temperature dimming rate and the set low color temperature dimming rate. The correction calculation includes a first calculation device, a third calculation device that performs a restoration calculation for calculating the restoration dimming rate, a drive circuit, and a light source unit including a high color temperature light emitting element and a low color temperature light emitting element. , The operation to convert the set dimming rate to the modified dimming rate, and the restoration operation restores the modified dimming rate to the restored dimming rate by a mathematical formula having the same value as the set dimming rate. The light source unit includes a high color temperature light emitting element and a low color temperature light emitting element, and the restored dimming rate is a PWM signal of a restored high color temperature dimming rate and a PWM signal of a restored low color temperature dimming rate. The high color temperature light emitting element is driven by the PWM signal of the restored high color temperature dimming rate, and the low color temperature light emitting element is driven by the PWM signal of the restored low color temperature dimming rate. The pulse is a lighting control system that does not turn on at the same time.

According to the present invention, it is possible to improve the control stability of dimming in the case of PWM control or the like where an error may occur during transmission.

Further, according to the present invention, it is possible to improve the control stability of toning when the high color temperature LED and the low color temperature LED are controlled by using PWM control or the like which may cause an error during transmission.

Further, according to the present invention, the color temperature control can be performed even when the color temperature range in which the color adjustment can be controlled in each light source is different from the color temperature range in which the color temperature can be controlled in the setting terminal.

Further, according to the present invention, even when the color temperature range in which the color adjustment can be controlled in each light source is different from the color temperature range in which the color temperature can be controlled in the setting terminal, the color temperature control with improved control stability is performed. Can be done.

The block diagram of the lighting control system of Embodiment 1. FIG. The figure which shows the relationship between the set dimming rate and the modified dimming rate in the lighting control system of Embodiment 1. FIG. The figure which shows the relationship between the correction dimming rate and the restoration dimming rate in the lighting control system of Embodiment 1. FIG. Sectional drawing of the lighting apparatus of Embodiment 1. FIG. The block diagram of the lighting control system of the variation of Embodiment 1. The block diagram of the lighting control system of the variation (wired connection) of Embodiment 1. The block diagram of the lighting control system of Embodiment 2. The figure which shows the display of the touch panel display of Embodiment 2. FIG. The table which shows the relationship of the restoration dimming rate with respect to the set total dimming rate D _a and the set color temperature _Ta of Embodiment 2. The figure which shows the time relationship of the pulse PC and the pulse _{P W} of Embodiment 2. The block diagram of the lighting control system of Embodiment 3. The table which shows the relationship between the virtual setting dimming rate and the driving dimming rate of Embodiment 3. The relationship between the set color temperature coefficient C _a and the drive color temperature T _b in the variation of the third embodiment. The block diagram of the lighting control system of Embodiment 4. The table which shows the relationship between the virtual correction dimming rate and the virtual restoration dimming rate in the lighting control system of Embodiment 4. The table which shows the relationship between the virtual correction dimming rate and the driving dimming rate in the lighting control system of Embodiment 4.

<Embodiment 1>
<Lighting control system>
The lighting control system according to the present embodiment is a lighting control system capable of transmitting a dimming signal wirelessly. As shown in FIG. 1 which is a configuration diagram, this includes a tablet 10 which is a setting terminal, a receiving module 20 which is a receiving unit, a power supply 30, wiring 39, and a light source unit 40. The tablet 10 has a built-in touch panel display 11, a first arithmetic unit 12, and a transmitter 13, which are setting units, a receiving module 20 has a receiver 21, a second arithmetic unit 22, and a power supply 30 is a third microcomputer. The arithmetic unit 31 and the drive circuit 32 are provided, and the light source unit 40 includes a plurality of LED elements 42 which are light emitting elements mounted on the printed circuit board 41. The receiving module 20 has a card type, its contacts are connected to the connection portion of the power supply 30, and the signal from the contacts is transmitted to the third arithmetic unit 31.

The receiving module 20, the power supply 30, the wiring 39, and the light source unit 40 are collectively referred to as the LED lighting device 50.

<Setting terminal (tablet) / transmission module>
The user sets the set dimming rate y _{1 on the touch panel display 11, and the set dimming rate y 1 is} corrected by the first arithmetic unit 12. Dimming rate y ₂ = ay ₁ + b (where y ₁ = 0%, y ₂ ). = 0%). As an example, a = 0.96 and b = 0.04, and the relationship between y ₁ and y ₂ at this time is shown in FIG. In this case, the signal is based on the signal to which the "offset" of b is added. The transmitter 13 wirelessly transmits the modified dimming rate y ₂ as a digital signal. The wireless transmission method is not particularly limited, but for example, transmission by IEEE802.154 or IEEE802.5.1 is preferable, and transmission may be performed via a repeater or the like. The transmitter 13 to the repeater may be set to IEEE802.11x, and the repeater to the receiving module 20 may be transmitted by another method such as IEEE802.1.4 or IEEE802.5.1. It should be noted that the signal may be sent to the power source by wire without using the transmitter 13. Further, the same operation may be performed on a PC (personal computer) or a smart phone instead of the tablet, and the tablet, the PC, the smart phone and the like are collectively referred to as a "setting terminal".

<Reception module / power supply>
The digital signal of the modified dimming rate y ₂ received by the receiver 21 of the receiving module 20 is converted into a PWM signal of the modified dimming rate y ₂ by the second arithmetic unit 22. This is, for example, a pulse having a frequency of 1 kHz and a duty of ₂ .

In the third arithmetic unit 31 in the power supply 30, the modified dimming rate y ₂ is restored to the restored dimming rate y ₃ by the equation “y ₃ = (y ₂ -b) / a”. This relationship is shown in FIG. The restored dimming rate y ₃ is mathematically the same as the set dimming rate y ₁ , but is the same as or similar to the set dimming rate because it may be affected by noise associated with transmission.

<Light source unit>
The drive circuit 32 of the power supply 30 supplies a drive output corresponding to the restored dimming rate y3 _{, for example, a PWM drive current of duty 3 to} the connected light source unit 40 through the wiring 39. The plurality of LED elements 42 are connected in series to the printed circuit board 41 to form the light source unit 40.

FIG. 4 shows a cross-sectional view of the LED lighting device 50 including the receiving module 20, the power supply 30, and the light source unit 40. A reflector 45 integrated with the accommodating portion 46 is attached to the ceiling 49. The printed circuit board 41 is installed on the lower side of the mounting member 43, the LED element 42 is mounted on the printed circuit board, and the cover members 44 are mounted on both ends of the mounting member 43. The power supply 30 is installed on the upper side of the mounting member 43, and the receiving module 20 is connected to the power supply 30.

<Advantage>
According to the present invention, it is possible to improve the transmission accuracy of the dimming rate. For this explanation, a case where control by a PWM signal corresponding to a dimming rate is performed without performing "correction with a tablet" and "restoration with a power supply" of the present invention will be considered. The PWM signal can transmit an accurate pulse width when the pulse rises momentarily and then falls momentarily after a certain period of time, but in reality, "blunting" occurs at the rise and fall of the pulse. When the pulse width becomes too narrow for this "bluntness", the transmission data becomes inaccurate depending on which height width of the pulse is used as the pulse width. If this signal has a dimming rate of, for example, 2% and an inaccuracy corresponding to a duty of ± 1% occurs, the fluctuation of the dimming rate changes from 1% to 3% in the conventional method, and the minimum and maximum values are 3. It will be doubled. Therefore, the brightness of one luminaire changes three times over time, and the brightness of many luminaires changes three times.

On the other hand, in the method of the present invention, since the set dimming rate of 2% is corrected to the corrected dimming rate of 6% and transmitted, even if there is an inaccuracy corresponding to the duty ± 1% there, the corrected dimming rate is corrected. The rate goes from 5% to 7%. As a result, the fluctuation of the corrected dimming rate is reduced to 7/5 = 1.4 times.

In the above example, the difference between the set dimming rate and the modified dimming rate is at most 4%, and an equation that does not have a large difference is adopted. In such a case, it is compatible with normal PWM dimming except that dimming of 4% or less is not possible, that is, the power supply 30 should also be used as a power source capable of inputting a normal PWM dimming signal. There is a merit that it can be done.

Although the corrected dimming rate after reception is described as being input to the third arithmetic unit as a PWM signal, it may be in another format such as a simple analog voltage signal. Although the restored dimming rate output from the third arithmetic unit is described as a PWM signal, it may be in another format such as a simple analog voltage signal.

<Relationship between preferable set dimming rate, corrected dimming rate, and restored dimming rate>
The modified dimming rate is preferably larger than the set dimming rate in a region where the set dimming rate is small, for example, when the set dimming rate is larger than 0% and 10% or less. As a result, even when the set dimming rate is small, the dimming of the light source unit can be performed with high accuracy.

It is preferable that the difference between the modified dimming rate and the set dimming rate is not so large, and the absolute value of the difference between the modified dimming rate and the set dimming rate (y2 _- y1) is 20% or _less . It is preferably 10% or less, and more preferably 10% or less. When the difference is small as described above, prima facie dimming control is possible even when a power source having no function of generating a restored dimming rate is operated.

The modified dimming rate is preferably expressed by a function obtained by multiplying the set dimming rate by a coefficient and adding an offset, that is, expressed in the form of "y ₂ = ay ₁ + b". At this time, the values of a and b are arbitrary, and may be, for example, a = 0.85 and b = 0.15.

It is preferable that the corrected dimming rate has a clear difference, for example, a discontinuous difference between the case where the set dimming rate is zero and the case where the set dimming rate is not zero (for example, 1%). As a result, it is possible to reliably turn off the light with the restored dimming rate at zero dimming rate. In the above-mentioned example of the set dimming rate y ₁ and the modified dimming rate y ₂ , y ₂ = 0 when y ₁ = 0 and y ₂ ≈ 0.05 when y ₂ = 0.01, which is a clear difference. Is on.

The formulas for the set dimming rate and the modified dimming rate are not one formula, but may be expressed by different formulas for a plurality of sections. As an example, "y ₂ = a Ly ₁ + b _{L1 when} y ₁ ≤ 10%, y ₂ = a _{Hy 1} + b _H when y ₁ >10%" may be used.

The formulas of the set dimming rate and the modified dimming rate are not limited to linear, and may be a quadratic function, a polynomial, or any other function. The calculation for deriving the modified dimming rate from the set dimming rate may be a method of calculating the output value by referring to the table stored in the memory for the input value.

<Variation 1>
The dimming rate transmitted wirelessly is not the modified dimming rate y2 but the set dimming rate y1, and the _second arithmetic unit 22 _on the receiving module _side generates "corrected dimming rate y2" to supply power. You may tell 30. As shown in FIG. 5, the hardware configuration is the same as that of FIG. 1, but the calculation from the set dimming rate to the modified dimming rate is performed by the "arithmetic unit 22" instead of the " arithmetic unit 12". In addition, the arithmetic of the arithmetic unit 12 and the arithmetic unit 22 can be realized only by changing the software.

<Variation 2>
The transmission of the dimming signal from the setting terminal 10 to the power supply 30 is not limited to wireless, but may be wired. This configuration is shown in FIG. The modified dimming rate signal output from the first arithmetic unit 12 is in the form of a PWM signal by the interface 14, is transmitted by the cable 18 connected to the transmission terminal 15, and is received by the reception terminal 19 of the power supply 30. Input to the third arithmetic unit 31.

<Other variations>
The drive output supplied to the light source unit is not limited to the PWM drive current of duty ₃ described above as long as the drive output can turn on the light source unit 40 with a brightness corresponding to the restored dimming rate. For example, the drive output may be a constant current corresponding to the restored dimming rate, and in that case, the influence of flicker (flicker) and electromagnetic noise can be reduced.

Further, as the drive output, PWM and a drive other than PWM may be combined, and for example, the amplitude may be changed in a region where the restoration dimming rate is low.

<Embodiment 2>
<Lighting control system>
The lighting control system according to the present embodiment is a lighting control system capable of wirelessly transmitting dimming / coloring signals. As shown in FIG. 7, which is a configuration diagram, this includes a tablet 60, a receiving module 70, a power supply 80, wiring 89, and a light source unit 90, which are setting terminals. The setting terminal 60 has a built-in touch panel display 61, a first arithmetic unit 62, and a transmitter 63, which are setting units, a receiving module 70 has a receiver 71 and a second arithmetic unit 72, and a power supply 80 has a third arithmetic unit. The 81, the drive circuit 82 is provided, and the light source unit 90 includes a high color temperature LED element 92c and a low color temperature LED element 92w, which are a plurality of light emitting elements mounted on the printed substrate 91. The receiving module 70 has a card type, its contacts are connected to the connection portion of the power supply 80, and the signal from the contacts is transmitted to the third arithmetic unit 81.

The receiving module 70, the power supply 80, the wiring 89, and the light source unit 90 are collectively referred to as the LED lighting device 100.

<Setting terminal / transmission module>
The user sets the set total dimming rate Da (0 to 1) and the set color temperature _Ta ( _6000K to 2500K in the above example) on the setting screen of the touch panel display 61 shown in FIG. The first arithmetic unit 62 of the setting terminal 60 has _a set dimming rate (set high color temperature adjustment) based on the set total dimming rate Da and the set color temperature _Ta (or the set color temperature coefficient C _a corresponding to _Ta ). The light rate y _1c and the set low color temperature dimming rate y _1w ) are calculated as follows.

The high color temperature on the setting side (6000K in this case) is T _{ac, the} low color temperature on the setting side (2500K in this case) is T _aw , the total dimming rate D _a is 0 to 1, and the color temperature coefficient C _a is 0 to 1. If (1 for T _ac , 0 for T _aw ), the set color temperature _Ta is
T _a = C _a T _ac + (1-C _a ) T _aw
That is, the set color temperature coefficient _Ca is
C _a = (T _a -T _aw ) / (T a _{c-T aw )}
And the set dimming rate (y _1c , y _1w ) is
y _1c = D _a C _a , y _{1 w} = D _a (1-C _a )
Will be.

For example, when the set total dimming rate D _a = 75% and the set color temperature T _a = 5000K, the set dimming rate (y _1c , y _1w ) is 54% and 21%, respectively.

Then, the set dimming rate (y _1c , y _1w ) is corrected by the first arithmetic unit 62, respectively (corrected high color temperature dimming rate y _2c = a _c y _1c + b _c (where y _1c = 0). %, Y _2c = 0%), modified low color temperature dimming rate y _2w = a _w y _1w + b _w (where y _1w = 0%, y _2w = 0%)). As an example, a _c = a _w = 0.96 and b _c = b _w = 0.04. The transmission module wirelessly transmits the modified dimming rate (y _2c , y _2w ) as a digital signal.

The modified dimming rate (y _2c , y _2w ) can be directly calculated from the set total dimming rate D _a and the set color temperature coefficient C _a as follows.

y _2c = a _c D _a C _a + b _c (However, when D _a = 0% or C _a = 0%, y _2c = 0%)
y _2w = a _w D _a (1-C _a ) + b _w (However, when D _a = 0% or C _a = 100%, y _2w = 0%)
Further, the set dimming rate (y _1c , y _1w ) may be set on the setting screen of the touch panel display 61.

<Reception module / power supply>
The modified dimming rate (y _2c , y _2w ), which is a digital signal received by the receiver 71 of the receiving module 70, is converted from the digital signal to the PWM signal by the receiving module 20. This is, for example, a pulse having a frequency of 1 kHz and a duty of y _2c and y _{2 w} , respectively, but the figure may be limited to this, for example, a frequency of 20 kHz.

In the third arithmetic unit 81 in the power supply 80, the restored dimming rate (restored high color temperature dimming rate y _3c = (y _2c ―bc) / _ac , restored from the corrected dimming rate (y _2c , y _2w ) ₎ . The low color temperature dimming rate y _3w = (y _2w ―b _w ) / _aw ) is calculated. The restored dimming rate (y _3c , y _3w ) is mathematically the same as the set dimming rate (y _1C, y _1w ), respectively, but after being affected by variations due to the rise and fall of the pulse width, etc. The value. The drive circuit 82 outputs drive currents corresponding to y _3c and y _3w to the high color temperature LED element 92c and the low color temperature LED element 92w of the light source unit 90, respectively, through the wiring 89.

FIG. 9 shows a table of typical set total dimming rate D _a and restored dimming rate (y _3c , y _3w ) with respect to the set color temperature _Ta values.

Regarding the waveform of the PWM signal of the restored dimming rate (y _3c , y _3w ), the temporal relationship thereof may not be particularly limited, but in the present embodiment, the drive current and the low driving current of the high color temperature LED element 92c are particularly low. The drive current of the color temperature LED element 92w is prevented from being turned on at the same time. This is a device for switching and using only one power supply in time without using two power supplies for the high color temperature LED and the low color temperature LED.

As an example, consider the case where "Da ₌ 75%, Ta ₌ 5000K" is set in the table of FIG. 9 and the period of 1 duty is T. At this time, looking at the cells in the row of the arrows in the table, the restored high color temperature dimming rate y _3c (duty for high color temperature LED) is 54%, and the restored low color temperature dimming rate y _3w (duty for low color temperature). ) Is 21%. When considering one pulse PC in which the PWM drive current of the high color temperature LED element 92c is ON and one pulse _{P W} in which the PWM drive current of the low color temperature LED element 92w is ON, the timing at which the pulse P _W rises is determined. , Da = “ _0.71T ” at which the pulse PC ends when 100% (full power) is set. Then, in FIG. 10 showing the time (%) of 1 duty on the horizontal axis and the time relationship between the pulse PC and the pulse _{P W} when the output is taken on the vertical axis, the pulse PC is “ ₀ to 0.54 T”. , Pulse P _W is "0.71T to 0.92T" (Note: 0.71 + 0.21 = 0.92), and pulse PC and pulse _{P W} are not turned on at the same time. Therefore, using one power supply, only the high color temperature LED element 92c can be driven at one timing, and only the low color temperature LED element 92w can be driven at another timing. By switching one power supply in time, dimming and toning can be performed. Can be realized. It is possible to supply the pulse PC and the pulse _{P W} independently to the LED without adjusting the timing in this way, but in that case, the timing at which the pulse PC and the pulse _{P W} occur at the same time occurs. Two power supplies, one for pulse PC and one for pulse _{P W} , are required.

<Relationship between preferable set dimming rate, corrected dimming rate, and restored dimming rate>
At least one of the modified dimming rates (y _2c , y _2w ) is a region where the corresponding set dimming rate (y _1c , y _1w ) is small, for example, the set dimming rate (y _1c , y _1w ) is 10% or less. In the case of, it is preferable that the value is corrected by a function larger than the set dimming rate (y _1c , y _1w ).

It is preferable that at least one of the modified dimming rates (y _2c , y _2w ) is not so different from the corresponding set dimming rate (y _1c , y _1w ), and the difference (y _2c − y _1c or The absolute value of y _2w − y _1w ) is preferably 20% or less, and more preferably 10% or less. When the difference is small as described above, prima facie dimming control is possible even when a power source having no function of generating the restored dimming rate (y _3c , y _3w ) is operated.

At least one of the modified dimming rates (y _2c , y _2w ) is expressed as a function obtained by multiplying the corresponding set dimming rate (y _1c , y _1w ) by a coefficient and adding an offset, that is, "y _2c ". It is preferably expressed in the form of "= a _c y _1c + b _c or y _2w = a _w y _1w + b _w ". At this time, the values of a and b are arbitrary, and may be, for example, a _c = 0.85 and _bc = 0.15.

At least one of the modified dimming rates (y _2c , y _2w ) is a clear difference between when the corresponding set dimming rate (y _1c , y _1w ) is zero and when it is not zero (eg 1%), eg no. It is preferable that there is a continuous difference. As a result, it is possible to reliably turn off the light with a dimming rate of zero at the corresponding restored dimming rate (y _3c , y _3w ). In the above-mentioned equations of the set dimming rate (y _1c , y _1w ) and the modified dimming rate (y _2c , y _2w ), y _2c = 0 when y _1c = 0 and y _2c ≈ 0 when y _2c = 0.01. It is preferable to make a clear difference from 0.05.

The equations for the set dimming rate (y _1c , y _1w ) and the modified dimming rate (y _2c , y _2w ) are not one equation, but may be expressed by different equations for a plurality of sections. As an example, "y _2c = a _cL y ₁ + b _cL1 when y _1c ≤ 10%, y _2c = a _cH y ₁ + b _cH when y ₁ >10%" may be used.

The equations of the set dimming rate (y _1c , y _1w ) and the modified dimming rate (y _2c , y _2w ) are not limited to linear, and may be a quadratic function, a polynomial, or any other function. The operation for correcting the dimming rate may be a method of calculating the output value by referring to the table stored in the memory for the input value.

<Embodiment 3>
The color temperature range of the luminaire that can be toned is not standardized, and there are various ones. For example, a high color temperature LED element is composed of 6500K and a low color temperature LED element is composed of 2200K. In that case, the setting of the setting terminal may be matched with "high color temperature LED = 6500K, low color temperature LED = 2200K". However, when a large number of lighting fixtures are controlled at the same time by the setting terminal, it is complicated to change the color temperature control range according to each lighting fixture. Therefore, in the present embodiment, regardless of the color temperature control range of the actual luminaire, the color temperature control is performed in the color temperature range of, for example, "6000K-2500K" on the setting terminal, and the luminaire side illuminates at the actual color temperature. It is converted into a drive signal for driving.

<Lighting control system>
As shown in FIG. 11 which is a configuration diagram, a specific lighting control system includes a tablet 110 which is a setting terminal, a receiving module 120, a power supply 130, wiring 139, and a light source unit 140. The setting terminal 110 has a built-in touch panel display 111, a first arithmetic unit 112, and a transmitter 113, which are setting units, a receiving module 120 has a receiver 121 and a second arithmetic apparatus 122, and a power supply 130 has a third arithmetic apparatus. A 131, a drive circuit 132, and a switch 136 are provided, and the light source unit 140 has a high color temperature LED element 142c (color temperature T _bc ) and a low color temperature 142 w (color temperature T _bw ), which are a plurality of light emitting elements mounted on the printed substrate 141. ). The receiving module 120 has a card type, and its contacts are connected to the connection portion of the power supply 130, and the signal from the contacts is transmitted to the third arithmetic unit 131.

The receiving module 120, the power supply 130, the wiring 139, and the light source unit 140 are collectively referred to as the LED lighting device 150.

<Setting terminal / transmission module>
The setting terminal 110 includes a touch panel display 111 that displays the same as the touch panel display 61 shown in FIG. 8, and has a set total dimming rate D _a of 0 to 1 and _a set color temperature Ta of 6000 K to 2500 K. Can be set.

The first arithmetic unit 112 has a virtual set dimming rate (virtual set high color temperature dimming rate y _ac , virtual set low color temperature set dimming rate y _aw ) from the set total dimming rate D _a and the set color temperature _Ta . Is calculated as follows. The high color temperature on the setting side is T _ac (6000K in this case) _{, the} low color temperature on the setting side is T _aw (2500K in this case), the total dimming rate D _a is 0 to 1, and the color temperature coefficient C _a is 0 to 1. (1 for T _ac , 0 for T _aw ). The relationship between the set color temperature T _a and the set color temperature coefficient C _a ,
T _a = C _a T _ac + (1-C _a ) T _aw
Then
C _a = (T _a -T _aw ) / (T a _{c-T aw )}
Will be. From this, the virtual set dimming rate (y _ac , y _aw ) determined by the set total dimming rate D _a and the set color temperature _{Ta is y ac =} D _a C _a and y _aw = D _a (1-C _a ), respectively.
Will be.

The transmitter 113 transmits the virtual set dimming rate ( _yac , _yaw ) as a digital signal.

<Reception module / power supply>
The receiver 121 of the receiving module 120 receives the virtual set dimming rate (y _ac , y _aw ) which is a digital signal, and the second arithmetic unit 122 converts it into PWM signals of duty y _ac and y _aw , respectively.

In the third arithmetic unit 131 in the power supply 130, when the switch 136 is OFF, the PWM signal corresponding to the virtual setting dimming rate ( _yac , _yaw ) is output as it is, and the drive circuit 132 drives the same waveform. The current is output to the high color temperature LED element 142c and the low color temperature LED element 142w of the light source unit 140, respectively.

Here, considering the case where the color temperature T _bc of the high color temperature LED element _142c constituting the light source unit 140 is 6500 K and the color temperature T _bw of the low color temperature LED element 142 w is 2200 K, in order to obtain the set color temperature Ta. In addition, some ingenuity is required. When the switch 136 is ON, the third arithmetic unit 131 calculates the drive dimming rate (drive high color temperature dimming rate y _bc , drive low color temperature dimming rate y _bw ) as follows.

In order to set the drive color temperature T _b of the light source unit 140 composed of the high color temperature LED element _142c having a color temperature T _bc and the low color temperature LED element 142 w having a color temperature T _b to the set color temperature Ta, T _b . = T _a , that is, C _b T _bc + (1-C _b ) T _bw = C _a T _ac + (1-C _a ) T _{aw
T _ _ _ _ _ _ _ _ _}
T _ac -T _aw = ΔT _a, T _bc -T _bw = ΔT _b , and _from C _b = y _bc / (y _bc + y _bw )
y _bc = y _ac (T _ac -T _bw ) / ΔT _b + y _aw (T _aw -T _bw ) / ΔT _b
y _bw = y _ac (T _bc -T _ac ) / ΔT _b + y _aw (T _bc -T _aw ) / ΔT _b
Then, by substituting the values actually used in this embodiment, T _ac = 6000, T _aw = 2500, T _bc = 6500, and T _bw = 2200,
y _bc = 0.884 y _ac + 0.070 y _aw
y _bw = 0.116y _ac + 0.930y _aw
Will be. The drive circuit 132 outputs a drive output corresponding to the drive dimming rate (y _bc , y _bw ) to the light source 140 through the wiring 139.

In this way, each of the drive dimming rates (y _bc , y _bw ) is calculated using both of the virtual set dimming rates (y _ac , y _aw ). In other words, the virtual setting dimming rate ( _yac , _yaw ) is matrix-calculated to derive the driving dimming rate (y _bc , y _bw ). FIG. 12 shows a table of the drive dimming rate when the set color temperature Ta is _6000K to 2500K and the set total dimming rate is 1.

<Variations>
In the above example, one setting terminal 110 controls one LED lighting device 150, but in reality, one setting terminal can control the color temperature of the high color temperature LED element and the low color temperature LED element. When controlling a plurality of different LED lighting devices, this method is particularly suitable because the same color temperature control can be performed regardless of the difference in the color temperature of the LEDs used in each LED lighting device.

In the above example, since T _bc > T _ac and T _bw <T _aw , all the color temperature T _a in the set color temperature range could be reproduced by the light source unit 140, but T _bc <T _ac , T _bw . > T _aw . For example, when the light source unit 140 in FIG. 11 is replaced with 140V, the high color temperature LED element 142c is replaced with 142Vc (color temperature T _bc = 5500K), and the low color temperature LED element 142w is replaced with 142Vw (color temperature T _bw = 3000K). And.

The relationship between the drive dimming rate (y _bc , y _bw ) and the virtual setting dimming rate (y _ac , y _aw ) can be found by inputting the above values.
y _bc = 1.2y _ac -0.2y _aw
y _bw = -0.2y _aw + 1.2y _ac
However, the drive dimming rate (y _bc , y _bw ) can only take a value of 0 or more and 1 or less. Therefore, the relationship between the set color temperature coefficient C _a and the drive color temperature T _b of the light source unit 140 V is as shown in FIG.

In this case, Ta < _3000K and Ta> _5500K are out of the set range. Therefore, for example, when the light source unit 140 sends information on the color temperature setting range to the setting terminal 110, and the setting terminal 110 sets a color temperature outside the setting range on the touch panel display 111, "the color temperature in this range cannot be set". A warning display such as "Some lighting fixtures cannot set the color temperature in this range" may be displayed.

<Embodiment 4>
The fourth embodiment is a combination of the idea of the "corrected dimming rate" in the first embodiment with the third embodiment.

<Lighting control system>
As shown in FIG. 14, which is a configuration diagram, the lighting control system includes a tablet 160, a receiving module 170, a power supply 180, wiring 189, and a light source unit 190, which are setting terminals. The setting terminal 160 has a built-in touch panel display 161 which is a setting unit, a first arithmetic unit 162, and a transmitter 163, a receiving module 170 has a receiver 171 and a second arithmetic apparatus 172, and a power supply 180 has a third arithmetic unit. A light source unit 190 includes a 181 and a switch 186, and a drive circuit 182. The light source unit 190 is a high color temperature LED element 192c (color temperature T _bc ) and a low color temperature LED element 192w (color temperature), which are a plurality of light emitting elements mounted on the printed substrate 191. T _bw ) is provided. The receiving module 170 has a card type, its contacts are connected to the connection portion of the power supply 180, and the signal from the contacts is transmitted to the third arithmetic unit 181.

The receiving module 170, the power supply 180, the wiring 189, and the light source unit 190 are collectively referred to as the LED lighting device 200.

<Setting terminal / transmission module>
The setting terminal 160 includes a touch panel display 111 that displays the same as the touch panel display 61 shown in FIG. 8, and has 0 to 1 as the set total dimming rate _{Da and T ac ( 6000K} ) to T as the set color temperature Ta. _Aw (2500K) can be set.

The first arithmetic unit 162 sets the virtual set dimming rate (y _ac , y _aw ) _from the set total dimming rate D _a and the set color temperature coefficient C _a = T _a / (T a _c -T a _w ) _. C _a , y _aw = D _a (1-C _a )
And calculate.

The first arithmetic unit 162 further sets the virtual set dimming rate (y _ac , y _aw ) to the virtual modified dimming rate (virtual modified high color temperature dimming rate y _2c = a _c y _ac + b _c (where y _ac =). When 0%, y _2c = 0%), virtual correction low color temperature dimming rate y _2w = a _w y _aw + b _w (however, when y a _{w = 0%, y 2w =} 0%). a _c = a _w = 0.96, b _c = b _w = 0.04. The transmission module wirelessly transmits the virtual modified dimming rate (y _2c , y _2w ) as a digital signal.

<Reception module / power supply>
The virtual modified dimming rate (y _2c , y _2w ), which is a digital signal received by the receiver 171 of the receiving module 170, is converted from the digital signal to the PWM signal by the receiving module 20. This is, for example, a pulse having a frequency of 1 kHz and a duty of y _2c and y _{2 w} , respectively.

In the third arithmetic unit 181 in the power supply 180, the virtual correction dimming rate (y _2c , y _2w ) is the virtual restoration dimming rate (virtual restoration high color temperature dimming rate y _3c = (y _2c ―b _c ) / a. _c , Virtual restoration Low color temperature dimming rate y _3w = (y _2w ―b _w ) / _aw ).

When the switch 186 in the power supply 180 is OFF, the above-mentioned virtual restoration dimming rate (y _3c , y) is used as the drive dimming rate when the third arithmetic unit 181 uses an LED having the same color temperature as the set color temperature. _3w ) is output. FIG. 15 shows a table of virtual correction dimming rate and virtual restoration dimming rate when the set color temperature Ta is _6000K to 2500K and the set total dimming rate is 1.

By turning on the switch 186 in the power supply 180, the third arithmetic unit 181 converts the signal for adjusting the drive color temperature of the light source unit.

If there is no correction of the dimming rate, the drive dimming rate (y _bc , y _bw ) when using an LED whose color temperature is different from the setting is
y _bc = y _ac (T _ac -T _bw ) / ΔT _b + y _aw (T _aw -T _bw ) / ΔT _b
y _bw = y _ac (T _bc -T _ac ) / ΔT _b + y _aw (T _bc -T _aw ) / ΔT _b
Met. When y _ac and y _bc are virtual correction dimming rates (y _2c , y _2w ), the drive dimming rate (y _bc , y _bw ) is
y _bc = (y _2c / a _c ) (T _ac -T _bw ) / ΔT _b + (y _2w / a _w ) (T _aw -T _bw ) / ΔT _b + ((-b _c / a _c ) (T) _ac -T _bw ) / ΔT _b + (-b _w / a _w ) (T _aw -T _bw ) / ΔT _b )
y _bw = (y _2c / a _c ) (T _bc -T _ac ) / ΔT _b + (y _2w / a _w ) (T _bc -T _aw ) / ΔT _b + ((-b _c / a _c ) (T) _bc -T _ac ) / ΔT _b + (-b _w / a _w ) (T _bc -T _aw ) / ΔT _b )
Will be.

Values actually used in this embodiment, T _ac = 6000, T _aw = 2500, T _bc = 6500, T _bw = 2200, a _c = a _w = 0.96, b _c = b _w = 0. Substituting 04,
y _bc = 0.920y _2c +0.073y _2w -0.040
y _bw = 0.121y _{2c +} 0.969y _2w -0.044
However, when y _2c = 0, it is calculated as y _2c = 0.04 by the above formula, and when y _2w = 0, it is calculated as y _2w = 0.04 by the above formula.

The drive circuit 182 outputs a drive output corresponding to the drive dimming rate (y _bc , y _bw ) to the light source 190 through the wiring 189.

Although the formula for directly calculating the drive dimming rate (y _bc , y _bw ) from the virtual modified dimming rate (y _{2c, y 2w) is shown here, the virtual modified dimming rate (y 2c , y 2w ) is} shown. The virtual restoration dimming rate (y _3c , _{y 3w} ) may be calculated from the above, and then the driving dimming rate (y _bc , y _bw ) may be calculated. The table of the virtual correction dimming rate (y _2c , y _2w ) and the driving dimming rate (y _bc , y _bw ) with respect to the set color temperature _Ta in the case of the set total dimming rate 1 is shown.

As described above, when the toning control is performed when the toning range is different between the control side and the light source side, the virtual correction dimming is performed to reduce the error near the dimming rate of 0%. From the rate, it is possible to calculate the drive dimming rate for driving the light source unit using the LED having a color temperature different from the set color temperature.

It should be noted that the above-described embodiment disclosed this time is an example in all respects and does not serve as a basis for a limited interpretation. Therefore, the technical scope of the present invention is not construed solely by the embodiments described above, but is defined based on the description of the scope of claims. It also includes all changes within the meaning and scope of the claims.

10, 60, 110, 160 tablets (setting terminal)
11, 61, 111, 161 Touch panel display (setting unit)
12, 62, 112, 162 First arithmetic unit 13, 63, 113, 163 Transmitter 14 Interface 15 Transmission terminal 18 Cable 19 Reception terminal 20, 70, 120, 170 Reception module 21, 71, 121, 171 Receiver 22, 72, 122, 172 Second arithmetic unit 30, 80, 130, 180 Power supply 31, 81, 131, 181 Third arithmetic unit 32, 82, 132, 182 Drive circuit 39, 89, 139, 189 Wiring 136, 186 Switch 40 , 90, 140, 140V, 190 Light source unit 41, 91, 141, 191 Printed board 42 LED element 43 Mounting member 44 Cover member 45 Reflector plate 46 Housing unit 49 Ceiling 92c, 142c, 142Vc, 192c High color temperature LED element 92w, 142w, 142Vw, 192w Low color temperature LED element 50, 100, 150, 200 LED lighting device

Claims (10)

A setting terminal that sets the setting dimming rate and
The first arithmetic unit that performs the correction calculation to calculate the correction dimming rate,
A lighting control system including a third arithmetic unit that performs a restoration calculation for calculating a restoration dimming rate, a drive circuit, and a light source unit including a light emitting element.
The correction operation is an operation for converting the value of the set dimming rate into the value of the modified dimming rate by a predetermined mathematical formula.
The restoration operation is an operation for restoring the value of the modified dimming rate to the value of the restoring dimming rate by a mathematical formula that sets the value of the modified dimming rate to the same value as the set dimming rate.
The drive circuit is a lighting control system that supplies a drive output corresponding to the restored dimming rate to the light source unit including the light emitting element. Set high color temperature dimming rate and set low color temperature dimming rate, modified high color temperature dimming rate and modified low color temperature dimming rate, modified high color temperature dimming rate, restored high color temperature dimming rate It is a lighting control system that calculates the restoration dimming rate consisting of the rate and the restoration low color temperature dimming rate.
The set total dimming rate and the set color temperature, which are the sum of the set high color temperature dimming rate and the set low color temperature dimming rate, are set, or the set high color temperature dimming rate and the set low color temperature control rate are set. A setting terminal that sets the light rate and
The first arithmetic unit that performs the correction calculation for calculating the correction dimming rate, and
It is provided with a third arithmetic unit that performs a restoration calculation for calculating the restoration dimming rate, a drive circuit, and a light source unit including a high color temperature light emitting element and a low color temperature light emitting element .
The correction operation is an operation for converting the value of the set dimming rate into the value of the modified dimming rate by a predetermined mathematical formula.
The restoration operation is an operation for restoring the value of the modified dimming rate to the value of the restoring dimming rate by a mathematical formula that sets the value of the modified dimming rate to the same value as the set dimming rate.
The drive circuit is a lighting control system that supplies a drive output corresponding to the restored dimming rate to the light source unit including the light emitting element. The lighting control according to claim 1 or 2, further comprising a transmitter for wirelessly transmitting the modified dimming rate or a transmitting terminal for wired transmission, and a receiver or a receiving terminal for receiving the transmitted modified dimming rate. system. When the value of the set dimming rate is larger than 0% and 10% or less, the modified dimming rate calculated from the set dimming rate has a larger value than the set dimming rate, claims 1 to 3. The lighting control system according to any one of the above items. The lighting control system according to any one of claims 1 to 4, wherein the difference between at least one of the modified dimming rates and the corresponding set dimming rate is 20% or less. The lighting control system according to any one of claims 1 to 5, wherein the modified dimming rate is represented by a function obtained by multiplying the corresponding set dimming rate by a coefficient and adding an offset. The lighting control system according to any one of claims 1 to 6, wherein the modified dimming rate has a discontinuous difference when the corresponding set dimming rate is zero and when the set dimming rate is not zero. The lighting control system according to any one of claims 1 to 7, wherein the modified dimming rate is input to the third arithmetic unit as a PWM signal. The lighting control system according to any one of claims 1 to 8, wherein the restored dimming rate is output as a PWM signal from the third arithmetic unit. Set high color temperature dimming rate and set low color temperature dimming rate, modified high color temperature dimming rate and modified low color temperature dimming rate, modified high color temperature dimming rate, restored high color temperature dimming rate It is a lighting control system that calculates the restoration dimming rate consisting of the rate and the restoration low color temperature dimming rate.
The set total dimming rate and the set color temperature, which are the sum of the set high color temperature dimming rate and the set low color temperature dimming rate, are set, or the set high color temperature dimming rate and the set low color temperature control rate are set. A setting terminal that sets the light rate and
The first arithmetic unit that performs the correction calculation for calculating the correction dimming rate, and
It is provided with a third arithmetic unit that performs a restoration calculation for calculating the restoration dimming rate, a drive circuit, and a light source unit including a high color temperature light emitting element and a low color temperature light emitting element.
The correction operation is an operation for converting the value of the set dimming rate into the value of the modified dimming rate by a predetermined mathematical formula.
The restoration operation is an operation for restoring the value of the modified dimming rate to the value of the restoring dimming rate by a mathematical formula that sets the value of the modified dimming rate to the same value as the set dimming rate.
The light source unit includes a high color temperature light emitting element and a low color temperature light emitting element.
The restored dimming rate consists of a PWM signal having a restored high color temperature dimming rate and a PWM signal having a restored low color temperature dimming rate.
The pulse in which the high color temperature light emitting element is driven in the PWM signal of the restored high color temperature dimming rate and the pulse in which the low color temperature light emitting element is driven in the PWM signal of the restored low color temperature dimming rate are , A lighting control system that does not turn on at the same time.

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