JP6845899B2 - Dimming toning lighting system - Google Patents

Description

The present invention mainly relates to a dimming toning lighting system and a dimming toning power supply used for dimming LED lighting, and particularly to a 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 electric 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 color matching 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 bulb-colored light 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 object is to enable the color adjustment control when the color temperature range for performing the color adjustment control and the color temperature range for the 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 with one toning control.

The third problem is to realize dimming and toning by switching only one power source in time without using two power sources for the high color temperature LED and the low color temperature LED.

The present invention provides a setting terminal for setting a value capable of calculating a high color temperature dimming rate, a low color temperature dimming rate, a high color temperature dimming rate, and a low color temperature dimming rate, a single power supply, and a high value. A dimming toning illumination system including a light source unit including a color temperature light emitting element and a low color temperature light emitting element and driving the light source unit, wherein the setting terminal has the high color temperature dimming rate and the low color temperature. The total dimming rate, which is the total dimming rate, is set to a value not exceeding 100%, and the drive current of the high color temperature light emitting element when the total dimming rate is 100% is turned on for the one power supply. The total dimming rate is less than 100% for the 1-duty period T including the first period corresponding to the period and the second period corresponding to the period when the drive current of the low color temperature light emitting element is turned on. In this case, the high color temperature light emitting element is driven in the period of the _{pulse P c} corresponding to the high color temperature dimming rate in the first period, and the said in the first pulseless period without the _{pulse P c.} The drive of the high color temperature light emitting element is controlled by the high color temperature dimming rate corresponding to the ratio of the period of the _{pulse Pc} to the one duty period T without driving the high color temperature light emitting element, and the driving of the high color temperature light emitting element is controlled. Of these, the low color temperature light emitting element is driven in the period of the _{pulse P w} corresponding to the low color temperature dimming rate, and the low color temperature light emitting element is driven in the second pulseless period without the _{pulse P w.} Instead, the drive of the low color temperature light emitting element is controlled by the low color temperature dimming rate, which is the ratio of the period of the _{pulse P w} to the one duty period T _{, and the pulse P c} and the pulse P _w are turned on at the same time. not, the pulse P _w rises when the end of the first pulse without period, the when all dimming ratio is less than 100%, the period of the pulse P _c, the first pulse without period of the pulse P _w It is a dimming toning lighting system that drives a light source by repeating the period and the second pulseless period.

In the present invention, the setting terminal, the can be set all the dimming ratio and the color temperature, the high color temperature dimming ratio and the low color temperature dimming ratio, the all dimmer rate and the color temperature It is preferable to calculate based on.

In the present invention, the setting terminal includes a transmit unit, the 1 horns supply comprises a receiver, the receiver from the transmitter, the high color temperature dimming ratio and the low color temperature light control rate It is preferable to wirelessly transmit two calculable values.

In the present invention , the setting terminal transmits a set value set by the setting terminal or a correction value obtained by adding a predetermined correction to the set value set by the setting terminal, and the light source unit performs the correction. It is preferable to calculate the period of the _{pulse P c} and the pulse P _w using the restored value obtained by restoring the value.

According to the present invention, dimming and toning can be realized by using only one power source without using two power sources for a high color temperature LED and a low color temperature LED.

The block diagram of the lighting control system of Embodiment 1. 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. FIG. 3 is a cross-sectional view of the lighting device of the first embodiment. 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. Setting the total dimming ratio D _a of the second _embodiment, a table showing the relationship between restoration dimming ratio with respect to the value of the set color temperature T _a. Shows a temporal relationship between the pulse P _C and the pulse P _W of the second embodiment. 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 wirelessly transmitting a dimming signal. 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 touch panel display 11, a first arithmetic unit 12, and a transmitter 13 which are setting units, the receiving module 20 has a receiver 21 and a second arithmetic unit 22, and the power supply 30 is a 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 IEEE802.1.5 or IEEE802.5.1. 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 with 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 formula “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>
Driving circuit 32 of the power supply 30 supplies through wires 39, to the light source unit 40 which is connected, driving output corresponding to restore the dimming ratio _{y 3,} for example, the PWM driving current duty _{y 3.} 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. If the pulse width is so narrow that it cannot be ignored with respect to 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, the corrected dimming is performed even if there is an inaccuracy corresponding to the duty ± 1%. The rate goes from 5% to 7%. When this is restored to the original dimming rate, the fluctuation of the restored dimming rate is reduced by 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, modified 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 greater 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.

Fixed dimming ratio, it preferably has a difference between the set dimmer rate is not too large, the absolute value of the difference between the set dimmer rate and modifying the dimming ratio (y 2 _{-y 1)} is 20% or less It is preferably 10% or less, and more preferably 10% or less. When the difference is small as described above, dimming control can be performed even when a power source having no function of generating a restored dimming rate is operated.

The modified dimming rate is preferably expressed as a function obtained by multiplying the set dimming rate by a coefficient and adding an offset, that is, 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, it may be a "when _{y 1 ≦ 10% y 2 =} a L y 1 + b L1, y 1> when 10% of _{y 2 = a H y 1 +} b H ".

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>
Dimming rate transmitted wirelessly to remain set dimming ratio y ₁ not modify the dimming ratio y _2, to generate a "modified dimming ratio y _2" in the second arithmetic unit 22 of the receiving module side 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 "second arithmetic unit 22" instead of the "first arithmetic unit 12". It can be realized only by changing the calculation of the first arithmetic unit 12 and the second arithmetic unit 22 in terms of software.

<Variation 2>
The transmission of the dimming signal from the setting terminal 10 to the power supply 30 is not limited to wireless, and 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 it is a drive output capable of lighting the light source unit 40 with a brightness corresponding to the restoration dimming rate. For example, the drive output may be a constant current corresponding to the restoration 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 incorporates a touch panel display 61, a first arithmetic unit 62, and a transmitter 63, which are setting units, the receiving module 70 incorporates a receiver 71 and a second arithmetic unit 72, and the power supply 80 is a third arithmetic unit. 81, a 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 circuit board 91. The receiving module 70 has a card type, and 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 ratio _D a (0 to 1) set on the screen and set color temperature _{T a} of the touch panel display 61 shown in FIG. 8 (6000K~2500K in the above example). First calculation unit 62 of the setting device 60 is set than the entire dimming ratio D _a and the set color temperature T _{a (or} T set color temperature coefficient corresponding to _a C _a), setting the dimming ratio (set high color temperature adjustment The light rate y _1c and the set low color temperature dimming rate y _1w ) are calculated as follows.

Set side high color temperature (in this case 6000K) to _{T ac,} set side low color temperature (in this case 2500 K) and _{T aw,} setting 0-1 all dimming ratio _{D a,} 0-1 a set color temperature coefficient _{C a} 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 C _a is
_{C a = (T a -T aw} ) / (T ac -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 it is setting the total dimming ratio _D a = 75%, if the set color temperature _T a = 5000K, set the dimming ratio _{(y 1c,} y _1w) is 54%, respectively, is 21%.

Then, the set dimming rate (y _1c , y _1w ) is adjusted 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). When%, y _2c = 0%), and the 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 (where y _{2c = 0% when D a} = 0% or C _a = 0%)
y _2w = a _w D _a (1-C _a ) + b _w (where _{y 2 w} = 0% _{when D a} = 0% or C _a = 100%)
_{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 is limited to this, and may be a figure, for example, a frequency of 20 kHz.

In the third arithmetic unit 81 of the power supply 80, modify the dimming ratio _{(y 2c, y 2w)} restore the dimming ratio from (reconstructed high color temperature dimming ratio _{y 3c = (y 2c -b c} ) / a c, restore 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.

Typical settings entire dimming ratio _{D a,} restore the dimming ratio with respect to the value of the set color temperature _{T a (y 3c, y 3w} ) the table shown in FIG.

Regarding the waveform of the PWM signal of the restoration 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 drive 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 temporally switching and using only one power source without using two power sources for the high color temperature LED and the low color temperature LED.

As an example, _{"D a = 75%, T a} = 5000K " in the table of FIG. 9 is set, the period of one duty Consider the case of 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%. High color temperature LED element 92c of the PWM drive current of one pulse _{P C} to be ON, when considering one pulse _{P W} of the low color temperature LED element 92w PWM driving current becomes ON, the timing pulse _{P W} rises , the pulse _{P C} when the _D a = 100% (full power) is completed and "0.71T". Then, the horizontal axis 1 duty time (%), 10 showing the time relationship between the pulse _{P C} and the pulse _{P W} when the vertical axis took output, pulse _{P C} is "0~0.54T" , pulse _{P W} is "0.71T~0.92T" (Note: 0.71 + 0.21 = 0.92), and the pulse _{P C} and the pulse _{P W} do not become oN at the same time. Therefore, one power source can be used to drive only the high color temperature LED element 92c at a certain timing and only the low color temperature LED element 92w at another timing, and dimming and toning by switching one power source in time. Can be realized. In this way, without adjusting the timing, because although the pulse P _C and the pulse P _W may be independently supplied to the LED, case the timing pulse P _C and the pulse P _W occurs simultaneously occurs, two power supply for pulse P _C for a pulse P _W is required.

<Relationship between preferable set dimming rate, modified 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, dimming control can be performed 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 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, it may be a _{"y 1c} ≦ 10% when _{y 2c = a cL y 1 +} b cL1, y 1> 10% when _{y 2c = a cH y 1 +} b cH ".

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 calculation 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 color-adjustable lighting equipment is not standardized, and there are various types. 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 actual color temperature control range of the luminaire, the setting terminal performs color adjustment control in the color temperature range of, for example, "6000K-2500K", 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 incorporates a touch panel display 111, a first arithmetic unit 112, and a transmitter 113, which are setting units, a receiving module 120 incorporates a receiver 121, a second arithmetic apparatus 122, and a power supply 130 is 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.} ) Is provided. 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>
Setting terminal 110 includes a touch panel display 111 that displays similar to touch panel display 61 shown in FIG. 8, setting 0-1 as an all dimming ratio _{D a,} in the range of 6000K~2500K as set color temperature _{T a} Can be set.

Than the set color temperature T _a first arithmetic unit 112 sets the total dimming ratio D _a, the virtual set the dimming ratio (virtual set high color temperature dimming ratio y _ac, virtual set low color temperature setting dimming ratio y _aw) Is calculated as follows. Set side high color temperature is T _ac (6000K in this case) _, setting side low color temperature is T _aw (in this case 2500K), set total dimming rate D _a is 0 to 1, set 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 ac -T aw)
Will be. From this set the total dimming ratio _{D a,} the virtual set dimmer rate determined by the setting color temperature _{T a (y ac, y aw} ) each _{y ac = D a C a,} y aw = D a (1-C a)
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 ( _yac , _yaw ) 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, the color temperature _{T bc} of high color temperature LED elements 142c constituting the light source unit 140 is 6500K, the color temperature _{T bw} of low color temperature LED element 142w Consider the case of 2200 K, to obtain the set color temperature _{T a} 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.

To color temperature _{T bc} high color temperature LED elements 142c and the color temperature _{T bw} of low color temperature LED element 142w set color temperature _{T a} driving color temperature _{T b} of the composed light source unit 140 in the can, _{T b} = T _a , that is, C _b T _bc + (1-C _b ) T _bw = C _a T _ac + (1-C _a ) T _aw
From C _b = C _a (T _ac- T _ow ) / (T _bc- T _ww ) + (T _aw- T _ww ) / (T _bc- T _ww )
With T _ac −T _aw = ΔT _{a and} T _bc −T _bw = ΔT _{b , 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 the present 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 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). Figure 12 shows 2500 K, a table of driving dimming ratio in the case of setting the total dimming ratio 1 from the setting color temperature _{T a} is 6000K.

<Variation>
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.

_{T bc>} T _ac in the above example, since T bw _{<T aw,} but were able to reproduce all the color temperature _{T a} of the set color temperature range by the light source unit _{140, 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 _ow ) can be found by entering 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 _{T a <3000K, T a>} 5500K is outside the setting 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 incorporates a touch panel display 161 which is a setting unit, a first arithmetic unit 162, and a transmitter 163, the receiving module 170 incorporates a receiver 171 and a second arithmetic apparatus 172, and the power supply 180 is 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 plurality of light emitting elements mounted on a printed substrate 191. High color temperature LED element 192c (color temperature T _bc ), low color temperature LED element 192w (color temperature). 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>
Setting terminal 160 is provided with a touch panel display 111 that displays similar to touch panel display 61 shown in FIG. 8, setting 0-1 as an all dimming ratio _{D a, T ac (6000K)} ~T as set color temperature _{T a Aw} (2500K) can be set.

First calculation unit 162 is set the set color temperature coefficient and total dimming ratio _{D a C a = T a /} (T ac -T aw) from the virtual set the dimming ratio _{(y ac,} y _aw) a y _ac = _{D a} C _a , y _aw = D _a (1-C _a )
Is calculated as.

The first arithmetic unit 162 further sets the virtual set dimming rate ( _yac , _yaw ) to the virtual modified dimming rate (virtually modified high color temperature dimming rate y _2c = a _c y _ac + b _c (however, 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 aw} = 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 of the power supply 180, the virtual corrected dimming ratio _{(y 2c, y 2w)} virtual restore the dimming ratio is (virtual reconstructed high color temperature dimming ratio _{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 third arithmetic unit 181 uses the LED having the same color temperature as the set color temperature as the drive dimming rate, which is the above-mentioned virtual restoration dimming rate (y _3c , y). _3w ) is output. Figure 15 shows the set color temperature _{T a} is 2500K from 6000K, in the case of setting the total dimming ratio 1, a table of virtual corrected dimming rate-virtual restore the dimming ratio.

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 _bb ) 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.

The 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.

Here, the virtual corrected dimming rate _{(y 2c,} y _2w) from the drive dimming ratio _{(y bc,} y _bw) showed expression for calculating the direct, virtual corrected dimming ratio _{(y 2c,} y _2w) virtual restore dimming ratio from _{(y 3c,} y _3w) on calculating the driving dimming ratio _{(y bc,} y _bw) good 16 be calculated, set color temperature _{T a} is 2500K from 6000K, configuration in a total dimming rate 1 shows a table of virtual corrected dimming ratio _{(y 2c,} y _2w) and driving the dimming ratio _{(y bc,} y _bw) for setting color temperature _{T a.}

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 above-described embodiments, but is defined based on the description of the 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 1st 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 circuit 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 (4)

Setting terminal for setting high color temperature dimming rate and low color temperature dimming rate or high color temperature dimming rate and low color temperature dimming rate, one power supply, and high color temperature light emitting element A dimming toning lighting system that includes a light source unit including a low color temperature light emitting element and drives the light source unit.
The setting terminal is set to a value at which the total dimming rate, which is the sum of the high color temperature dimming rate and the low color temperature dimming rate, does not exceed 100%.
The one power supply
It corresponds to the first period corresponding to the period in which the drive current of the high color temperature light emitting element is ON and the period in which the drive current of the low color temperature light emitting element is ON when the total dimming rate is 100%. For the 1-duty period T including the second period
When the total dimming rate is less than 100%,
Wherein in the high in color temperature adjustment period of the pulse P _c corresponding to an optical index drives the high color temperature light-emitting element, a first pulse tooth period without prior Symbol pulses P _c of the first period without driving the high color temperature light-emitting element, and controls the drive of the high color temperature light-emitting element by the high color temperature dimming ratio corresponding to the ratio of the period of the pulse P _c relative to the 1-duty period T,
The low in the in the period of the pulse P _w corresponding to a low color temperature dimming ratio driving the low color temperature light-emitting element, a second pulse tooth period without the pulse P _w of the second period without driving the color temperature light-emitting element, wherein the controlling the driving of the low color temperature light-emitting element by the low color temperature light control rate corresponding to the ratio of the period of the pulse P _w with respect to the 1-duty period T,
Not pulse P _c and the pulse P _w is the ON state at the same time, the pulse P _w rises when the end of the first pulse without period,
In the case before Symbol entire dimming ratio is less than 100%, the period of the pulse P _c, the first pulse without period, the period of the pulse P _w, for driving the light source by repeating the second pulse without period Dimming toning lighting system. The setting terminal can set the total dimming rate and the color temperature.
The high color temperature dimming rate and the low color temperature dimming rate are calculated based on the total dimming rate and the color temperature.
The dimming toning lighting system according to claim 1. The setting terminal includes a transmitter, and the one power supply includes a receiver.
Two values capable of calculating the high color temperature dimming rate and the low color temperature dimming rate are wirelessly transmitted from the transmitter to the receiver.
The dimming toning lighting system according to claim 1 or 2. The setting terminal transmits a set value set by the setting terminal or a correction value obtained by adding a predetermined correction to the set value calculated from the set value to the receiver.
The light source unit calculates the period of the _{pulse P c} and the pulse P _w using the restored value obtained by restoring the corrected value.
The dimming toning lighting system according to any one of claims 1 to 3.

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