JP2020161295A - Illumination system - Google Patents

Abstract

To provide an illumination system in which discomfort caused by change in brightness is suppressed even when different types of illumination apparatuses are used together.SOLUTION: An illumination system includes: a light source; and a dimmer for supplying, to the light source, DC voltage having a first voltage value belonging to a first voltage range as DC voltage depending on a degree of dimming corresponding to a set value for brightness of the light source. The dimmer supplies, to the light source, DC voltage having a second voltage value belonging to a second voltage range lower than the lower limit of the first voltage range as DC voltage indicating one response time selected by a user from a predetermined plurality of response times. When detecting DC voltage having the second voltage value, the light source sets one dimming function indicating a variation in brightness in the one response time and, when the first voltage value changes depending on change in the degree of dimming, performs operation for changing brightness at speed defined on the basis of the one dimming function.SELECTED DRAWING: Figure 1

Description

Embodiments of the present invention relate to lighting systems.

Conventionally, a proposal regarding a method for controlling an optical output in a light source such as an LED according to a power supply state from a DC power source has been made.

Specifically, for example, Patent Document 1 discloses a light source lighting device that controls light output in a light source such as an LED according to an input voltage input from a DC power supply via a pair of DC supply lines. ..

Japanese Patent No. 5058778

The embodiment provides a lighting system capable of suppressing a sense of discomfort due to a change in brightness even when different types of lighting fixtures are used in combination.

The lighting system of the embodiment uses the DC voltage of the first voltage value belonging to the first voltage range as the DC voltage corresponding to the light source and the dimming degree corresponding to the set value of the brightness of the light source. A lighting system comprising a dimmer configured to supply the dimmer, wherein the dimmer is a DC voltage indicating a response time selected by the user from a plurality of predetermined response times. The DC voltage of the second voltage value belonging to the second voltage range lower than the lower limit value of the first voltage range is supplied to the light source, and the light source is of the second voltage value. When a DC voltage is detected, one dimming function indicating the amount of change in brightness during the one response time is set, and the first voltage value changes according to the change in dimming degree. When it is detected, an operation for changing the brightness at a speed defined based on the above-mentioned dimming function is performed.

According to the lighting system of the embodiment, it is possible to suppress a sense of discomfort caused by a change in brightness even when different types of lighting fixtures are used in combination.

The figure which shows the structure of the main part of the lighting system which concerns on embodiment. The figure for demonstrating an example of the specific structure of the LED bulb included in the lighting system which concerns on embodiment. The figure for demonstrating an example of the dimming function used for the operation of the lighting system which concerns on embodiment.

Hereinafter, embodiments will be described with reference to the drawings.

As shown in FIG. 1, the lighting system 1 includes a dimmer 10, a DC dimmer 20, and a plurality of LED bulbs 30. FIG. 1 is a diagram showing a configuration of a main part of a lighting system according to an embodiment.

The dimming table 10 has a fader capable of setting the dimming intensity corresponding to the set value of the brightness of each of the LED bulbs 30 to a desired value from 0 to 100% according to the operation of the user. It is configured. Further, the dimming table 10 is configured to generate a dimming signal indicating the dimming degree set in the fader and to output the generated dimming signal to the DC dimmer 20. There is.

The DC dimmer 20 is configured to include, for example, a DC power supply circuit or the like. Further, the DC dimmer 20 is provided with a response time setting unit 21 and a lighting state setting unit 22.

The response time setting unit 21 changes the brightness of each of the LED bulbs 30 to the changed dimming degree from the timing when the dimming degree indicated by the dimming signal output from the dimming table 10 is changed according to the user's operation. It is configured to have a switch capable of setting a response time corresponding to the time until the timing at which the change to the corresponding brightness ends to be set to one of a plurality of predetermined response times.

In the present embodiment, the brightness of each of the LED bulbs 30 is changed from the timing when the above-mentioned response time is changed from 0 to 100% in the dimming intensity indicated by the dimming signal output from the dimming table 10. It shall be defined as the time until the timing when the brightness changes to the brightness corresponding to 100% dimming. Further, the above-mentioned response time is not limited to the time set according to the response performance related to the change in brightness in another type of lighting equipment (halogen lamp or the like) different from the LED bulb 30, and is not limited to the time set, for example, described later. The time may be set according to the response performance related to the operation of the lighting device 31 of.

The lighting state setting unit 22 changes the lighting state of each of the LED light bulbs 30, which is defined as a variation pattern of the brightness of each of the LED light bulbs 30, to one of a plurality of predetermined lighting states according to the user's operation. It is configured with a switch that can be set.

Immediately after the power is turned on, the DC dimmer 20 detects the response time set in the response time setting unit 21, and outputs the DC voltage of the voltage value VLB set according to the detected response time to the LED. It is configured to continuously supply each of the light bulbs 30 for a certain period of time.

The voltage value VLB is set as a voltage value lower than the lower limit value of the voltage range VZA (described later), and is set as a voltage value belonging to a voltage range VZB different from the voltage range VZC (described later).

Within the voltage range VZB, different voltage ranges are preset according to the number of types of response time that can be set by the operation of the response time setting unit 21.

Specifically, for example, when the response time that can be set by the operation of the response time setting unit 21 is two types, the response time TRA and the response time TRB, the voltage range VZBP corresponding to the response time TRA and the said The voltage range VZBQ corresponding to the response time TRB and the voltage range VZB are preset in the voltage range VZB. Therefore, for example, when the DC dimmer 20 detects that the response time set by the response time setting unit 21 is TRA, the voltage value selected from the voltage range VZBP is set as the voltage value VLB. At the same time, the DC voltage of the voltage value VLB is continuously supplied to each of the LED bulbs 30 for a certain period of time. Further, when the DC dimmer 20 detects that the response time set by the response time setting unit 21 is TRB, for example, the voltage value selected from the voltage range VZBQ is set as the voltage value VLB. At the same time, the DC voltage of the voltage value VLB is continuously supplied to each of the LED bulbs 30 for a certain period of time.

That is, the DC dimmer 20 is lower than the lower limit of the voltage range VZA as a DC voltage indicating one response time selected by the user from a plurality of predetermined response times immediately after the power is turned on. It is configured to continuously supply the DC voltage of the voltage value VLB belonging to the voltage range VZB to the LED bulb 30 for a certain period of time.

Immediately after the power is turned on, the DC dimmer 20 detects the lighting state set in the lighting state setting unit 22, and sets the DC voltage of the voltage value VLC corresponding to the detected lighting state to the LED bulb 30. It is configured to supply each of them continuously for a certain period of time.

The voltage value VLC is set as a voltage value lower than the lower limit value of the voltage range VZA (described later), and is set as a voltage value belonging to a voltage range VZC different from the voltage range VZB.

Within the voltage range VZC, different voltage ranges are set in advance according to the number of types of lighting states that can be set by operating the lighting state setting unit 22.

Specifically, for example, when there are three types of lighting states that can be set by operating the lighting state setting unit 22, the lighting state ESP, the lighting state ESQ, and the lighting state ESR, the voltage range corresponding to the lighting state ESP. The VZCP, the voltage range VZCQ corresponding to the illumination state ESQ, and the voltage range VZCR corresponding to the illumination state ESR are preset in the voltage range VZC. Therefore, for example, when the DC dimmer 20 detects that the lighting state set by the lighting state setting unit 22 is the lighting state ESP, the DC dimmer 20 sets the voltage value selected from the voltage range VZCP as the voltage value. It is set as VLC, and the DC voltage of the voltage value VLC is continuously supplied to each of the LED bulbs 30 for a certain period of time. Further, when the DC dimmer 20 detects that the lighting state set by the lighting state setting unit 22 is the lighting state ESQ, for example, the voltage value selected from the voltage range VZCQ is set as the voltage value. It is set as VLC, and the DC voltage of the voltage value VLC is continuously supplied to each of the LED bulbs 30 for a certain period of time. Further, when the DC dimmer 20 detects that the lighting state set by the lighting state setting unit 22 is the lighting state ESR, for example, the voltage value selected from the voltage range VZCR is set as the voltage value. It is set as VLC, and the DC voltage of the voltage value VLC is continuously supplied to each of the LED bulbs 30 for a certain period of time.

The DC dimmer 20 detects the dimming degree indicated by the dimming signal output from the dimmer 10 after completing the supply of the DC voltage of the voltage value VLB and the supply of the DC voltage of the voltage value VLC, and also detects the dimming degree. It is configured to convert the detected dimming degree into a DC voltage of a voltage value VLA belonging to the voltage range VZA for dimming and supply it to each of the LED bulbs 30. That is, the DC dimmer 20 applies the DC voltage of the voltage value VLA belonging to the voltage range VZA to the LED bulb 30 as the DC voltage corresponding to the dimming degree indicated by the dimming signal output from the dimmer 10. It is configured to perform the operation for supplying.

Each voltage value belonging to the voltage range VZA for dimming corresponds to the voltage value used when changing the brightness (dimency) of the LED bulb 30. Further, the lower limit value of the voltage range VZA for dimming corresponds to the voltage value of the DC voltage supplied to each of the LED bulbs 30 when the dimming degree is 0. Further, the upper limit value of the voltage range VZA for dimming corresponds to the voltage value of the DC voltage supplied to each of the LED bulbs 30 when the dimming degree is 100%.

According to the present embodiment, the voltage value of the DC voltage supplied from the DC dimmer 20 to each of the LED bulbs 30 in the voltage range VZA is indicated by the dimming signal output from the dimmer table 10. It shall increase in proportion to the dimming degree.

The LED bulb 30 includes a lighting device 31 and an LED light emitting unit 32 provided with an LED that emits light with an amount of light corresponding to the current value of the drive current supplied from the lighting device 31.

The lighting device 31 is configured to control the lighting state of the LED light emitting unit 32 according to the DC voltage supplied from the DC dimmer 20. Further, as shown in FIG. 2, the lighting device 31 includes a voltage detection unit 41, a microcontroller 42, a drive control unit 43, and an LED drive unit 44. FIG. 2 is a diagram for explaining an example of a specific configuration of an LED light bulb included in the lighting system according to the embodiment.

The voltage detection unit 41 is configured to include, for example, a resistor or the like. Further, the voltage detection unit 41 is configured to detect the DC voltage supplied from the DC dimmer 20 and output an output current corresponding to the magnitude of the detected DC voltage to the microcontroller 42. ..

The microcontroller 42 is configured to detect the current value of the output current output from the voltage detection unit 41 and to perform an operation according to the detected current value. Further, the microcontroller 42 includes a ROM (Read Only Memory) 42A and a RAM (Random Access Memory) 42B.

The ROM 42A stores a plurality of dimming functions corresponding to each of a plurality of predetermined response times that can be set by operating the response time setting unit 21.

The dimming function stored in the ROM 42A is a drive current supplied from the LED drive unit 44 to the LED light emitting unit 32 in response to a change in the dimming degree indicated by the dimming signal output from the dimming table 10. It is created as a function used to specify the speed at which the current value is changed.

The ROM 42A stores a plurality of lighting functions corresponding to each of a plurality of predetermined lighting states that can be set by operating the lighting state setting unit 22.

The lighting function stored in the ROM 42A is created as a function for defining a supply pattern of the drive current supplied from the LED drive unit 44 to the LED light emitting unit 32.

When the microscope 42 continuously detects that the current value of the output current output from the voltage detection unit 41 is the current value corresponding to any voltage value VLB belonging to the voltage range VZB for a certain period of time, A dimming function FDX corresponding to the detected current value is selected and read from a plurality of dimming functions stored in the ROM 42A, and the read dimming function FDX is written to the RAM 42B and temporarily held. It is configured to do. Further, the microcontroller 42 is configured to output the dimming function FDX written in the RAM 42B to the drive control unit 43.

When the microscope 42 continuously detects for a certain period of time that the current value of the output current output from the voltage detection unit 41 is a current value corresponding to any voltage value VLC belonging to the voltage range VZC, A lighting function FLX corresponding to the detected current value is selected and read from a plurality of lighting functions stored in the ROM 42A, and the read lighting function FLX is written to the RAM 42B and temporarily held. It is configured.

When the microcontroller 42 detects that the current value of the output current output from the voltage detection unit 41 is the current value corresponding to the voltage value VLA belonging to the voltage range VZA, the detected current value is transmitted to the RAM 42B. It is configured to output the current value obtained by applying it to the held lighting function FLX to the drive control unit 43.

The drive control unit 43 is configured to include, for example, a control circuit or the like. Further, the drive control unit 43 controls the LED to change the current value of the drive current supplied to the LED light emitting unit 32 at a speed defined based on the dimming function FDX output from the microcontroller 42. It is configured to perform with respect to the drive unit 44.

The drive control unit 43 detects the current value of the drive current flowing through the LED light emitting unit 32, and compares the detected current value with the current value output from the microcontroller 42 to obtain a comparison result. It is configured to control the LED drive unit 44 to perform the corresponding operation.

Specifically, the drive control unit 43 compares, for example, that the current value ILV detected according to the drive current flowing through the LED light emitting unit 32 and the current value ICV output from the microcontroller 42 are different. When the result is obtained, the LED drive unit 44 is controlled to change the current value of the drive current supplied to the LED light emitting unit 32 so that the current value ILV becomes the same value as the current value ICV. It is configured to do so. Further, when the drive control unit 43 obtains a comparison result that the current value ILV flowing through the LED light emitting unit 32 and the current value ICV output from the microcontroller 42 are the same, the current value ILV is determined. It is configured to control the LED drive unit 44 to fix the current value of the drive current supplied to the LED light emitting unit 32 so as to be maintained.

The LED drive unit 44 is configured to include, for example, a voltage-current conversion circuit or the like. Further, the LED drive unit 44 converts the DC voltage supplied from the DC dimmer 20 into a DC current, and uses the converted DC current to correspond to a DC current having a current value according to the control of the drive control unit 43. It is configured to generate a driving current to be generated and to supply the generated driving current to the LED light emitting unit 32.

Subsequently, the operation of the present embodiment will be described. In the following description, the case where the response time that can be set by the operation of the response time setting unit 21 is two types of 10 ms and 100 ms will be described as an example. Further, thereafter, the lighting state that can be set by the operation of the lighting state setting unit 22 is the first lighting state corresponding to the normal lighting state and the second lighting state corresponding to the lighting state simulating the movement of the candle light. An explanation will be given by taking as an example three types of a lighting state and a third lighting state corresponding to a lighting state in which blinking is repeated at a predetermined cycle. In the following, the voltage range VZA is set as a range of 40 volts or more and 80 volts or less, the voltage range VZB is set as a range of 10 volts or more and 19 volts or less, and the voltage range VZC is set as 30 volts or more. Moreover, the case where the range is set to 39 volts or less will be described as an example.

Before turning on the power of the DC dimmer 20, the user operates the response time setting unit 21 to set the response time of each of the LED bulbs 30 to either 10 ms or 100 ms.

When the DC dimmer 20 detects that the response time set by the response time setting unit 21 is 10 ms, the DC dimmer 20 sets a voltage value selected from, for example, a voltage range of 10 volt to 14 volt. It is set as VLB, and the DC voltage of the voltage value VLB is continuously supplied to each of the LED bulbs 30 for a certain period of time. Further, when the DC dimmer 20 detects that the response time set by the response time setting unit 21 is 100 ms, for example, the voltage value VLB is selected from the voltage range of 15 volt to 19 volt. The voltage value is set as the voltage value VLB, and the DC voltage of the voltage value VLB is continuously supplied to each of the LED bulbs 30 for a certain period of time.

The microcontroller 42 continuously determines that the current value of the output current output from the voltage detection unit 41 is a current value corresponding to any voltage value VLB belonging to the voltage range of 10 volts to 14 volts for a certain period of time. When detected, the dimming function FDA corresponding to the detected current value is selected and read from the plurality of dimming functions stored in the ROM 42A, and the read dimming function FDA is written to the RAM 42B. Temporarily hold with. Further, the microcontroller 42 outputs the dimming function FDA written in the RAM 42B to the drive control unit 43.

The dimming function FDA, for example, shows the brightness of each of the LED bulbs 30 from the timing TA in which the dimming intensity indicated by the dimming signal output from the dimming table 10 is changed from 0 to 100%, as shown in FIG. It is created as a function such that the response time PB until the timing TB when the brightness changes to the brightness corresponding to the dimming degree after the change is 10 ms. When the voltage range VZA is set to a range of 40 volts or more and 80 volts or less, the magnitude of the voltage in the section from 0 to 100% dimming is 40 volts. Therefore, for example, when the dimming function FDA of FIG. 3 is output from the microcontroller 42 and then the dimming degree is changed in a state where the microcontroller 42 does not read the lighting function from the ROM 42A, the drive control unit 43 directs current. The LED drive unit 44 is controlled to sequentially supply the DC current obtained by converting the DC voltage supplied from the dimmer 20 at a speed of 4 volts per ms to the LED light emitting unit 32 as a drive current. .. FIG. 3 is a diagram for explaining an example of a dimming function used for the operation of the lighting system according to the embodiment.

The microcontroller 42 continuously determines that the current value of the output current output from the voltage detection unit 41 is a current value corresponding to any voltage value VLB belonging to the voltage range of 15 volts to 19 volts for a certain period of time. When it is detected, the dimming function FDB corresponding to the detected current value is selected and read from the plurality of dimming functions stored in the ROM 42A, and the read dimming function FDB is written to the RAM 42B. Temporarily hold with. Further, the microcontroller 42 outputs the dimming function FDB written in the RAM 42B to the drive control unit 43.

As shown in FIG. 3, the dimming function FDB has, for example, the brightness of each of the LED bulbs 30 from the timing TA in which the dimming intensity indicated by the dimming signal output from the dimming table 10 is changed from 0 to 100%. It is created as a function such that the response time PC until the timing TC when the brightness ends to change to the brightness corresponding to the dimming degree after the change is 100 ms. When the voltage range VZA is set to a range of 40 volts or more and 80 volts or less, the magnitude of the voltage in the section from 0 to 100% dimming is 40 volts. Therefore, for example, when the dimming function FDB of FIG. 3 is output from the microcontroller 42 and then the dimming degree is changed in a state where the microcontroller 42 does not read the lighting function from the ROM 42A, the drive control unit 43 directs current. The LED drive unit 44 is controlled to sequentially supply the DC current supplied from the dimmer 20 to the LED light emitting unit 32 as a drive current by converting the DC voltage supplied from the dimmer 20 at a speed of 0.4 volts per ms. To do.

That is, when the LED light bulb 30 continuously detects the DC voltage of the voltage value VLB supplied from the DC dimmer 20 for a certain period of time, one response selected by the user from a plurality of predetermined response times. A dimming function indicating the amount of change in brightness with time was set, and it was detected that the voltage value VLA changed according to the change in dimming degree indicated by the dimming signal output from the dimming table 10. In this case, an operation for changing the brightness at a speed specified based on the one dimming function is performed. Further, the LED bulb 30 is selected by the user from a plurality of dimming functions stored in the ROM 42A when the DC voltage of the voltage value VLB supplied from the DC dimmer 20 is continuously detected for a certain period of time. The operation for selecting one dimming function indicating the amount of change in brightness in one response time is performed.

Before turning on the power of the DC dimmer 20, the user operates the lighting state setting unit 22 to change the lighting state of each of the LED bulbs 30 to the first lighting state, the second lighting state, and the third lighting state. Set to one of the lighting conditions.

When the DC dimmer 20 detects that the lighting state set by the lighting state setting unit 22 is the first lighting state, for example, a voltage selected from a voltage range of 31 volts to 33 volts. The value is set as the voltage value VLC, and the DC voltage of the voltage value VLC is continuously supplied to each of the LED bulbs 30 for a certain period of time. Further, when the DC dimmer 20 detects that the lighting state set by the lighting state setting unit 22 is the second lighting state, the DC dimmer 20 selects from, for example, a voltage range of 34 volts to 36 volts. The voltage value is set as the voltage value VLC, and the DC voltage of the voltage value VLC is continuously supplied to each of the LED bulbs 30 for a certain period of time. Further, when the DC dimmer 20 detects that the lighting state set by the lighting state setting unit 22 is the third lighting state, the DC dimmer 20 selects from, for example, a voltage range of 37 volts to 39 volts. The voltage value is set as the voltage value VLC, and the DC voltage of the voltage value VLC is continuously supplied to each of the LED bulbs 30 for a certain period of time.

The microcontroller 42 continuously determines that the current value of the output current output from the voltage detection unit 41 is a current value corresponding to any voltage value VLC belonging to the voltage range of 31 volt to 33 volt for a certain period of time. If it is detected, the lighting function stored in the ROM 42A is not read. Further, when the lighting function stored in the ROM 42A is not read, the microcontroller 42 writes information indicating that the operation is performed without using the lighting function in the RAM 42B and temporarily holds the information. Therefore, when the microcontroller 42 detects the current value corresponding to the voltage value VLA belonging to the voltage range VZA without reading the lighting function from the ROM 42A, the detected current value is output to the drive control unit 43 as it is. To do.

The microcomputer 42 continuously determines that the current value of the output current output from the voltage detection unit 41 is a current value corresponding to any voltage value VLC belonging to the voltage range of 34 volts to 36 volts for a certain period of time. When it is detected, the lighting function FLA corresponding to the detected current value is selected and read from the plurality of lighting functions stored in the ROM 42A, and the read lighting function FLA is temporarily written to the RAM 42B. Hold on.

The lighting function FLA is created, for example, as a function that outputs a decimal random number at a predetermined cycle. Therefore, when the microcontroller 42 detects the current value corresponding to the voltage value VLA belonging to the voltage range VZA in the state where the lighting function FLA is read from the ROM 42A, the lighting function FLA is used for the detected current value. The current value multiplied by the obtained random number is output to the drive control unit 43. Then, according to such an operation of the microcontroller 42, the magnitude of the drive current supplied from the LED drive unit 44 to the LED light emitting unit 32 can be irregularly changed, and the LED light emitting unit 32 can be changed. The provided LED can be made to emit light so as to fluctuate.

The microcontroller 42 continuously determines that the current value of the output current output from the voltage detection unit 41 is a current value corresponding to any voltage value VLC belonging to the voltage range of 37 volts to 39 volts for a certain period of time. When it is detected, the lighting function FLB corresponding to the detected current value is selected and read from the plurality of lighting functions stored in the ROM 42A, and the read lighting function FLB is temporarily written to the RAM 42B. Hold on.

The lighting function FLB is created, for example, as a function that repeatedly outputs 0 and 1 at a predetermined cycle. Therefore, when the microcontroller 42 detects the current value corresponding to the voltage value VLA belonging to the voltage range VZA in the state where the lighting function FLB is read from the ROM 42A, the lighting function FLB is used for the detected current value. The current value multiplied by the obtained random number is output to the drive control unit 43. Then, according to such an operation of the microcontroller 42, the magnitude of the drive current supplied from the LED drive unit 44 to the LED light emitting unit 32 can be intermittently changed, and the LED light emitting unit 32 can be subjected to the operation. The provided LED can be blinked at a predetermined cycle.

As described above, according to the present embodiment, for example, when the LED light bulb 30 and a lighting fixture of a type different from the LED light bulb 30 such as a halogen lamp are used in combination, the brightness of the LED light bulb 30 is increased. The response speed related to the change in the lamp can be adjusted so as to match the response performance of the luminaire. Therefore, according to the present embodiment, it is possible to suppress a sense of discomfort caused by a change in brightness even when different types of lighting fixtures are used in combination.

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

1 Lighting system 10 Dimmer 20 DC dimmer 21 Response time setting unit 22 Lighting state setting unit 30 LED light bulb 31 Lighting device 32 LED light emitting unit 41 Voltage detection unit 42 Microcontroller 43 Drive control unit 44 LED drive unit

Claims (2)

It is configured to supply the DC voltage of the first voltage value belonging to the first voltage range to the light source as the DC voltage corresponding to the light source and the dimming degree corresponding to the set value of the brightness of the light source. A lighting system that has a dimmer and
The dimmer belongs to a second voltage range lower than the lower limit of the first voltage range as a DC voltage indicating one response time selected by the user from a plurality of predetermined response times. A DC voltage of a second voltage value is supplied to the light source,
When the light source detects the DC voltage of the second voltage value, the light source sets one dimming function indicating the amount of change in brightness in the one response time, and responds to the change in dimming degree. A lighting system characterized in that when it is detected that the first voltage value has changed, an operation for changing the brightness at a speed defined based on the one dimming function is performed. Immediately after the power is turned on, the dimmer continuously supplies the DC voltage of the second voltage value to the light source for a certain period of time.
When the light source continuously detects the DC voltage of the second voltage value supplied from the dimmer for a certain period of time, the light source is selected from a plurality of dimming functions corresponding to each of a plurality of predetermined response times. The lighting system according to claim 1, wherein the one dimming function is selected.

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