JP2022055547A - Lighting device and illumination fixture - Google Patents

Abstract

To provide a lighting device and an illumination fixture with which unnatural changes of a color of illuminated light during dimming control and toning control are suppressed.SOLUTION: There is provided a lighting device comprising: a first conversion circuit that enables dimming control of a first light source; a second conversion circuit that enables dimming control of a second light source; and a control unit for accepting input of a dimming signal that includes a first signal that represents a dimming degree of the first light source and a second signal that represents a dimming degree of the second light source, and exercising the dimming control and toning control of the light radiated from a light source unit having the first and the second light sources according to the dimming signal. When simultaneously performing the dimming control of the first light source and the dimming control of the second light source, the control unit sets a duration from the start of dimming to the end of dimming of the first light source to a prescribed duration and sets a duration from the start of dimming to the end of dimming of the second light source to a prescribed duration even when an amount of change of the dimming degree of the first light source and an amount of change of the dimming degree of the second light source are different.SELECTED DRAWING: Figure 1

Description

Embodiments of the present invention relate to lighting devices and luminaires.

A first light source, a second light source that irradiates light of a color different from that of the first light source, a lighting device that supplies power to each of the first light source and the second light source, and turns on the first light source and the second light source. Lighting equipment equipped with is known.

The luminaire mixes the light emitted from each of the first light source and the second light source, and individually adjusts the magnitude of the electric power supplied to each of the first light source and the second light source. As a result, in the lighting equipment, the brightness of the irradiated light can be changed and the color of the irradiated light can be changed. Controlling the brightness of the emitted light is called dimming control. Controlling the color of the emitted light is called toning control.

In such a lighting fixture, the change in the color of the emitted light may become unnatural during dimming control or toning control. For example, the first light source may be lit with 100% brightness and the second light source may be lit with 50% brightness, and the first light source and the second light source may be changed to 0% brightness. .. In this case, if the brightness of the first light source and the brightness of the second light source are changed at the same rate of change, the brightness of the second light source reaches 0% first, and only the brightness of the first light source changes. It looks like. Therefore, the period in which the brightness of each of the first light source and the second light source is changing, and the period in which the brightness of the second light source reaches 0% and only the brightness of the first light source is changing. , The color change may appear different, which may give a sense of discomfort to the user of the lighting equipment.

Therefore, it is desired that the lighting device and the luminaire can suppress an unnatural change in the color of the emitted light during the dimming control and the toning control.

Japanese Unexamined Patent Publication No. 2012-104453

An embodiment of the present invention provides a lighting device and a lighting fixture that suppress an unnatural change in the color of the emitted light during dimming control and toning control.

According to the embodiment, it has a first light source and a second light source that irradiates light of a color different from that of the first light source, and mixes light emitted from each of the first light source and the second light source. A lighting device that is connected to a light source unit for illuminating, supplies power to each of the first light source and the second light source, and lights the first light source and the second light source, and is electrically connected to the first light source. A first conversion circuit that enables dimming control of the first light source by converting the supplied power and supplying the converted power to the first light source, and the second light source. A second conversion circuit that enables dimming control of the second light source by electrically connecting to and converting the supplied power and supplying the converted power to the second light source, and the above. The first conversion circuit receives an input of a dimming signal including a first signal representing the dimming degree of the first light source and a second signal representing the dimming degree of the second light source, and based on the first signal. By controlling the conversion of power by, the magnitude of the power supplied to the first light source is controlled, the first light source is turned on with a brightness corresponding to the first signal, and the second signal is used as a basis. In addition, by controlling the conversion of power by the second conversion circuit, the magnitude of the power supplied to the second light source is controlled, and the second light source is turned on with a brightness corresponding to the second signal. By individually controlling the brightness of the light emitted from the first light source and the brightness of the light emitted from the second light source according to the dimming signal, the light is radiated according to the dimming signal. The control unit includes a control unit that controls dimming and color matching of the light emitted from the light source unit, and the control unit controls dimming control of the first light source and dimming control of the second light source. Even if the amount of change in the dimming degree of the first light source and the amount of change in the dimming degree of the second light source are different at the same time, the time from the start of dimming of the first light source to the end of dimming is predetermined. Provided is a lighting device characterized in that the time from the start of dimming of the second light source to the end of dimming is set to the predetermined time.

Provided are a lighting device and a lighting fixture that suppress an unnatural change in the color of the emitted light during dimming control and toning control.

It is a block diagram schematically showing a lighting device and a lighting fixture which concerns on embodiment. It is a graph which shows an example of the operation of a control part schematically. It is a graph which shows an example of the reference operation of a control part schematically. 4 (a) to 4 (c) are graphs schematically showing an example of the operation of the control unit. 5 (a) to 5 (c) are graphs schematically showing an example of another operation of the control unit. 6 (a) to 6 (c) are graphs schematically showing an example of another operation of the control unit. 7 (a) to 7 (c) are graphs schematically showing an example of another operation of the control unit.

Hereinafter, each embodiment will be described with reference to the drawings.
It should be noted that the drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the ratio of the sizes between the parts, and the like are not necessarily the same as the actual ones. Further, even when the same part is represented, the dimensions and ratios may be different from each other depending on the drawing.
In the specification of the present application and each figure, the same elements as those described above with respect to the above-mentioned figures are designated by the same reference numerals, and detailed description thereof will be omitted as appropriate.

FIG. 1 is a block diagram schematically showing a lighting device and a lighting fixture according to an embodiment.
As shown in FIG. 1, the luminaire 2 includes a lighting device 10 and a light source unit 12. The light source unit 12 has a first light source 21 and a second light source 22.

The second light source 22 irradiates light of a color different from that of the first light source 21. The first light source 21 irradiates, for example, neutral white light. The second light source 22 irradiates, for example, light bulb-colored light. However, the color of the light emitted by the first light source 21 and the second light source 22 is not limited to the above, and may be any color. The color of the light emitted by the second light source 22 may be any color different from the color of the light emitted by the first light source 21.

The light source unit 12 mixes the light emitted from each of the first light source 21 and the second light source 22. In other words, the second light source 22 irradiates the light so as to be mixed with the light emitted from the first light source 21. The second light source 22 is arranged in close proximity to the first light source 21, for example, and irradiates light in the same direction as the first light source 21. As a result, the light emitted from the second light source 22 can be mixed with the light emitted from the first light source 21. However, the configuration of the second light source 22 may be any configuration capable of irradiating the light so as to be mixed with the light emitted from the first light source 21.

The lighting device 10 is connected to the light source unit 12, supplies electric power to each of the first light source 21 and the second light source 22, and lights the first light source 21 and the second light source 22. Further, the lighting device 10 individually adjusts the magnitude of the electric power supplied to each of the first light source 21 and the second light source 22.

As a result, in the lighting fixture 2, the brightness of the light emitted from the light source unit 12 can be changed, and the color of the light emitted from the light source unit 12 can be changed. For example, the color of the light emitted from the light source unit 12 by individually changing the brightness of the first light source 11 that irradiates neutral white light and the brightness of the second light source 12 that irradiates light bulb-colored light. The temperature can be changed.

In this way, the lighting fixture 2 can perform dimming control and color matching control of the light emitted from the light source unit 12. The lighting device 10 controls the dimming and toning of the light emitted from the light source unit 12 by individually adjusting the magnitude of the electric power supplied to each of the first light source 21 and the second light source 22.

For the first light source 21 and the second light source 22, for example, a light emitting diode (LED) is used. The first light source 21 and the second light source 22 are composed of, for example, a plurality of light emitting diodes connected in series. However, the first light source 21 and the second light source 22 are, for example, an organic light emitting diode (OLED), an inorganic electroluminescence (Inorganic ElectroLuminescence) light emitting element, an organic electroluminescence (Organic ElectroLuminescence) light emitting element, or the like. It may be an electroluminescent type light emitting element or the like. The first light source 21 and the second light source 22 may be, for example, a light bulb.

The first light source 21 and the second light source 22 are, for example, detachably provided with respect to the lighting device 10. In other words, the first light source 21 and the second light source 22 are interchangeably provided with respect to, for example, the lighting device 10. However, the first light source 21 and the second light source 22 may be provided integrally with the lighting device 10.

When the first light source 21 and the second light source 22 are detachable from the lighting device 10, the second light source 22 may be provided integrally with the first light source 21, or may be provided separately from the first light source 21. It may be provided as a body. In other words, the light source unit 12 may be configured by one module in which the first light source 21 and the second light source 22 are integrated, or two modules in which the first light source 21 and the second light source 22 are separated. It may be configured with. The configuration of the first light source 21 and the second light source 22 may be any configuration capable of irradiating light according to the supply of electric power from the lighting device 10.

The lighting device 10 is electrically connected to the power supply PS. The lighting device 10 receives, for example, AC power from the power source PS. The power source PS is, for example, a commercial power source. The AC voltage of the AC power supplied from the power source PS is, for example, 100V to 242V (effective value). The power source PS may be, for example, a private power generator. The electric power supplied to the lighting device 10 is not limited to AC power, but may be DC power or the like.

The lighting device 10 is electrically connected to the light source unit 12. The lighting device 10 converts the AC power supplied from the power supply PS into power corresponding to the first light source 21 and the second light source 22 and supplies the AC power to the first light source 21 and the second light source 22. As a result, the lighting device 10 lights the first light source 21 and the second light source 22. The electric power supplied to the first light source 21 and the second light source 22 is, for example, DC electric power. The lighting device 10 converts AC power into DC power and supplies it to the first light source 21 and the second light source 22. However, the power supplied to the first light source 21 and the second light source 22 is not limited to DC power, but may be AC power or the like.

The lighting device 10 includes a power supply unit 30, a first conversion circuit 31, a second conversion circuit 32, and a control unit 34.

The power supply unit 30 is connected to the power supply PS. The power supply unit 30 converts the AC power supplied from the power supply PS into DC power. The power supply unit 30 is, for example, an AC-DC conversion circuit. The power supply unit 30 supplies the converted DC power to the first conversion circuit 31 and the second conversion circuit 32. For example, when DC power is supplied from the power supply PS, the power supply unit 30 may be omitted. For example, the electric power supplied from the power supply PS may be directly input to the first conversion circuit 31 and the second conversion circuit 32.

The first conversion circuit 31 is electrically connected to the first light source 21. The first conversion circuit 31 converts the supplied electric power and supplies the converted electric power to the first light source 21 to enable dimming control of the first light source 21. The first conversion circuit 31 is, for example, electrically connected to the power supply unit 30, converts the DC power supplied from the power supply unit 30 into DC power having a size corresponding to the first light source 21, and converts the DC power. Is supplied to the first light source 21.

The second conversion circuit 32 is electrically connected to the second light source 22. The second conversion circuit 32 converts the supplied electric power and supplies the converted electric power to the second light source 22, thereby enabling dimming control of the second light source 22. The second conversion circuit 32 is, for example, electrically connected to the power supply unit 30, converts the DC power supplied from the power supply unit 30 into DC power having a size corresponding to the second light source 22, and converts the DC power. Is supplied to the second light source 22.

In this way, the first conversion circuit 31 and the second conversion circuit 32 are both connected to one power supply unit 30, and are supplied with electric power together from one power supply unit 30. In other words, the second conversion circuit 32 is connected in parallel with the first conversion circuit 31 with respect to the output of the power supply unit 30. As a result, for example, as compared with the case where two power supply units 30 are provided, that is, a power supply unit 30 for the first conversion circuit 31 (AC-DC conversion circuit) and a power supply unit 30 for the second conversion circuit 32, the light is turned on. The number of parts of the device 10 can be reduced. For example, the manufacturing cost of the lighting device 10 can be suppressed. However, the lighting device 10 may have a configuration including a power supply unit 30 for the first conversion circuit 31 and a power supply unit 30 for the second conversion circuit 32.

The control unit 34 receives the input of the dimming signal. The dimming signal is a signal including a first signal representing the dimming degree (brightness) of the first light source 21 and a second signal representing the dimming degree of the second light source 22. The dimming degree is expressed as a percentage with the brightest state as 100%, for example. In other words, 100% of the dimming degree is the maximum power that can be supplied by the first conversion circuit 31 and the second conversion circuit 32. In other words, 0% of the dimming degree is in the extinguished state.

The control unit 34 controls the conversion of electric power by the first conversion circuit 31 based on the first signal included in the dimming signal. As a result, the control unit 34 controls the magnitude of the electric power supplied to the first light source 21, and turns on the first light source 21 with the brightness corresponding to the first signal.

Similarly, the control unit 34 controls the magnitude of the power supplied to the second light source 22 by controlling the power conversion by the second conversion circuit 32 based on the second signal included in the dimming signal. Then, the second light source 22 is turned on with the brightness corresponding to the second signal.

In this way, the control unit 34 performs dimming control of the first light source 21 and the second light source 22 according to the dimming signal input from the outside. The control unit 34 individually controls the brightness of the light emitted from the first light source 21 and the brightness of the light emitted from the second light source 22 according to the dimming signal. The control unit 34 performs dimming control and color matching control of the light emitted from the light source unit 12 in response to the dimming signal.

The dimming signal is input to the control unit 34 from, for example, an external wall switch or a remote controller. The lighting device 10 may further include, for example, a receiving unit for receiving a dimming signal transmitted from an external device and inputting it to the control unit 34. The dimming signal may be input to the control unit 34 from, for example, an operation unit provided in the lighting device 10. The lighting device 10 can set the dimming degree of the first light source 21 and the dimming degree of the second light source 22 based on an operation of, for example, a user, and controls a dimming signal corresponding to each set dimming degree. An operation unit or the like for inputting to the 34 may be further provided. The method of inputting the dimming signal to the control unit 34 is not limited to these, and any method capable of appropriately inputting the dimming signal to the control unit 34 may be used.

The power supply unit 30 includes a filter circuit 40, a rectifier circuit 42, an inrush prevention circuit 44, a power factor improving circuit 46, and a smoothing capacitor 48.

The filter circuit 40 is electrically connected to the power supply PS. The filter circuit 40 suppresses noise included in the AC power supplied from the power supply PS.

The rectifier circuit 42 is electrically connected to the filter circuit 40. The rectifier circuit 42 rectifies the AC voltage input via the filter circuit 40 and converts it into a rectified voltage. For the rectifier circuit 42, for example, a diode bridge in which four rectifier elements are combined is used. That is, the rectifier circuit 42 is a full-wave rectifier. The rectified voltage is, for example, a pulsating current voltage.

The rectifier circuit 42 may be a half-wave rectifier or the like. The rectified voltage may be a full-wave rectified pulsating current or a half-wave rectified pulsating current. For the rectifier circuit 42, for example, a Schottky barrier diode is used. Thereby, for example, good responsiveness can be obtained.

The inrush prevention circuit 44 is electrically connected to the rectifier circuit 42. The inrush prevention circuit 44 suppresses the inrush current generated when the power is turned on.

The power factor improving circuit 46 is connected to the output of the inrush prevention circuit 44. The power factor improving circuit 46 suppresses the generation of harmonics that are integral multiples of the power supply frequency in the rectified voltage. As a result, the power factor improving circuit 36 improves the power factor of the rectified voltage.

The power factor improving circuit 46 includes, for example, a switching element, an inductor, and a diode. The power factor improving circuit 46 is, for example, a boost chopper circuit. The power factor improving circuit 46 converts, for example, the AC voltage of the power supply PS of 100V to 242V (effective value) into a DC voltage of 420V. The power factor improving circuit 46 improves the power factor by, for example, switching the switching element and bringing the input current closer to the odd waveform of the sine wave. However, the power factor improving circuit 46 is not limited to this, and may be any circuit capable of improving the power factor of the rectified voltage.

The smoothing capacitor 48 is connected to the output of the power factor improving circuit 46. The smoothing capacitor 48 converts the pulsating current voltage into a DC voltage by smoothing the pulsating current voltage after the power factor is improved. As a result, the power supply unit 30 can convert the AC power supplied from the power supply PS into DC power. However, the configuration of the power supply unit 30 is not limited to this, and may be any configuration capable of converting AC power into DC power.

The first conversion circuit 31 includes, for example, a switching element, a diode, and an inductor. The first conversion circuit 31 is, for example, a step-down chopper circuit. The first conversion circuit 31 converts the DC voltage of the power factor improving circuit 46 of 420V into a DC voltage of 50V to 300V by switching the switching element, for example. Further, the first conversion circuit 31 is, in other words, a constant current circuit. The first conversion circuit 31 makes the current flowing through the first light source 21 substantially constant.

The dimming control of the first light source 21 by the first conversion circuit 31 and the control unit 34 changes the brightness of the first light source 21 by changing the magnitude of the direct current flowing through the first light source 21, for example. Crest value control. The control unit 34 controls the switching of the switching element of the first conversion circuit 31 based on the first signal included in the dimming signal, and changes the magnitude of the direct current flowing through the first light source 21 to obtain the first signal. The first light source 21 is turned on with the brightness corresponding to one signal.

The dimming control of the first light source 21 by the first conversion circuit 31 and the control unit 34 is, for example, first by supplying a pulse width modulated current to the first light source 21 and changing the pulse width of the current. So-called pulse width modulation control that changes the brightness of the light source 21 may be used. For example, when supplying a pulsating current or an alternating current to the first light source 21, the brightness of the first light source 21 may be changed by changing the amplitude of the pulsating current or the alternating current.

Since the configuration of the second conversion circuit 32 is substantially the same as the configuration of the first conversion circuit 31, detailed description thereof will be omitted. The second conversion circuit 32 and the control unit 34 change the brightness of the second light source 22 by, for example, changing the magnitude of the direct current flowing through the second light source 22. The control unit 34 controls the switching of the switching element of the second conversion circuit 32 based on the second signal included in the dimming signal, and changes the magnitude of the direct current flowing through the second light source 22 to obtain the second signal. The second light source 22 is turned on with the brightness corresponding to the two signals.

The lighting device 10 further includes, for example, a control power supply circuit 50, a step-down circuit 51, drive circuits 52 to 54, output capacitors 55 and 56, and detection resistors 57 and 58.

The control power supply circuit 50 is electrically connected to, for example, one end of the smoothing capacitor 48 on the high potential side. As a result, the DC voltage smoothed by the smoothing capacitor 48 is input to the control power supply circuit 50. The control power supply circuit 50 converts the DC voltage smoothed by the smoothing capacitor 48 into the drive voltage of the drive circuits 52 to 54 and supplies the DC voltage to the drive circuits 52 to 54. The drive circuits 52 to 54 are driven according to the power supply from the control power supply circuit 50.

The step-down circuit 51 is electrically connected to the control power supply circuit 50. The step-down circuit 51, for example, steps down the drive voltage for the drive circuits 52 to 54 generated by the control power supply circuit 50 to the drive voltage for the control unit 34, and supplies the drive voltage after the step-down to the control unit 34. .. The control unit 34 is driven according to the power supply from the step-down circuit 51.

The drive circuit 52 is electrically connected to the control unit 34 and the power factor improving circuit 46. The drive circuit 52 drives the switching of the switching element of the power factor improving circuit 46 based on the control of the control unit 34. In other words, the drive circuit 52 switches the switching element of the power factor improving circuit 46 to drive the improvement of the power factor of the rectified voltage in the power factor improving circuit 46.

The drive circuit 53 is electrically connected to the control unit 34 and the first conversion circuit 31. The drive circuit 53 drives the switching of the switching element of the first conversion circuit 31 based on the control of the control unit 34. In other words, the drive circuit 53 switches the switching element of the first conversion circuit 31 and drives the power conversion by the first conversion circuit 31. The drive circuit 53 changes the voltage value and the current value of the DC power supplied to the first light source 21 by changing the on / off cycle (duty ratio) of the switching element of the first conversion circuit 31, for example.

The drive circuit 54 is electrically connected to the control unit 34 and the second conversion circuit 32. The drive circuit 54 drives the switching of the switching element of the second conversion circuit 32 based on the control of the control unit 34. In other words, the drive circuit 54 switches the switching element of the second conversion circuit 32 and drives the power conversion by the second conversion circuit 32. The drive circuit 54 changes the voltage value and the current value of the DC power supplied to the second light source 22, for example, by changing the on / off cycle (duty ratio) of the switching element of the second conversion circuit 32.

The output capacitor 55 is provided on the output side of the first conversion circuit 31 and smoothes the DC power supplied from the first conversion circuit 31 to the first light source 21. The output capacitor 56 is provided on the output side of the second conversion circuit 32, and smoothes the DC power supplied from the second conversion circuit 32 to the second light source 22.

The detection resistor 57 is provided between the first conversion circuit 31 and the first light source 21. The detection resistor 57 detects the current flowing through the first light source 21. The detection resistance 57 is electrically connected to the control unit 34. Based on the detection result of the detection resistor 57, the control unit 34 controls the switching of the switching element of the first conversion circuit 31 so that a substantially constant DC current corresponding to the first signal flows to the first light source 21. do. As a result, the first light source 21 can be turned on with substantially constant brightness according to the first signal.

The detection resistor 58 is provided between the second conversion circuit 32 and the second light source 22. The detection resistor 58 detects the current flowing through the second light source 22. The detection resistance 58 is electrically connected to the control unit 34. Based on the detection result of the detection resistor 58, the control unit 34 controls the switching of the switching element of the second conversion circuit 32 so that a substantially constant DC current corresponding to the second signal flows to the second light source 22. do. As a result, the second light source 22 can be turned on with substantially constant brightness according to the second signal.

FIG. 2 is a graph schematically showing an example of the operation of the control unit.
As shown in FIG. 2, when the control unit 34 simultaneously performs the dimming control of the first light source 21 and the dimming control of the second light source 22, the amount of change in the dimming degree of the first light source 21 and the second dimming control are performed. Even if the amount of change in the dimming degree of the light source 22 is different, the time from the start of dimming of the first light source 21 to the end of dimming is set to Tp for a predetermined time, and the dimming ends from the start of dimming of the second light source 22. The time until is set as a predetermined time Tp. Here, "performing dimming control of the first light source 21 and dimming control of the second light source 22 at the same time" means that at least a part of the period of change in the brightness of the second light source 22 is the first light source 21. It means that it overlaps with at least a part of the period of change in brightness.

In other words, when the control unit 34 simultaneously performs the dimming control of the first light source 21 and the dimming control of the second light source 22, the dimming start of the second light source 22 is performed regardless of the amount of change in the dimming degree. The time from the start of dimming to the end of dimming is substantially the same as the time from the start of dimming to the end of dimming of the first light source 21. Here, the substantially same time means, for example, the difference between the time from the start of dimming of the first light source 21 to the end of dimming and the time from the start of dimming of the second light source 22 to the end of dimming. It means that it is 1 ms or less.

Further, as shown in FIG. 2, the control unit 34 sets the timing of the dimming start of the second light source 22 when the dimming control of the first light source 21 and the dimming control of the second light source 22 are performed at the same time. , The timing of the start of dimming of the first light source 21 is substantially the same. As a result, the timing of the end of dimming of the second light source 22 can be substantially the same as the timing of the end of dimming of the first light source 21. Here, the substantially same timing means that, for example, the difference between the timing of the start of dimming of the first light source 21 and the timing of the start of dimming of the second light source 22 is 1 ms or less.

FIG. 2 illustrates a case where the luminous intensity of the first light source 21 is changed from 100% to 0% and the luminous intensity of the second light source 22 is changed from 50% to 0%. In this case, the amount of change in the dimming degree of the first light source 21 is 100%, and the amount of change in the dimming degree of the second light source 22 is 50%. In this way, even if the amount of change in the dimming degree is different, the time from the start of dimming to the end of dimming is set to Tp for a predetermined time, and the timing of the start of dimming is substantially the same, so that the first light source 21 In each of the dimming control of the second light source 22 and the dimming control, the timing from the dimming start to the dimming end can be aligned.

The predetermined time Tp is set to, for example, the time when the dimming degree is changed from 0% to 100% at a predetermined rate of change. For example, when the rate of change in dimming intensity is 1% per 1 ms, the predetermined time Tp is set to 100 ms. The predetermined time Tp is set to, for example, a fixed value of 100 ms.

The predetermined time Tp may be set according to, for example, the larger change amount of the change amount of the dimming degree of the first light source 21 and the change amount of the dimming degree of the second light source 22. For example, it is assumed that the amount of change in the dimming degree of the first light source 21 is 50% and the amount of change in the dimming degree of the second light source 22 is 30%. In this case, Tp is set for a predetermined time according to the amount of change in the dimming degree of the first light source 21. For example, when the rate of change in the luminous intensity is 1% per 1 ms, the predetermined time Tp is set to 50 ms according to the amount of change in the luminous intensity of the first light source 21 by 50%. This makes it possible to prevent the time required for dimming control from becoming long when the amount of change in dimming degree is small.

FIG. 3 is a graph schematically showing an example of a reference operation of the control unit.
In FIG. 3, from the state where the first light source 21 is lit with 100% brightness and the second light source 22 is lit with 50% brightness, the first light source 21 and the second light source 22 are lit with 0% brightness. An example in which the brightness of the first light source 21 and the second light source 22 are changed at the same rate of change is schematically shown.

As shown in FIG. 3, in this case, the brightness of the second light source 22 reaches 0% first, and it seems that only the brightness of the first light source 21 is changing. Therefore, during the period when the brightness of each of the first light source 21 and the second light source 22 is changing, the brightness of the second light source 22 reaches 0%, and only the brightness of the first light source 21 changes. The change in the color of the light emitted from the light source unit 12 may appear to be different depending on the period of time, which may give a sense of discomfort to the user of the lighting equipment or the like. In other words, the period during which the brightness of each of the first light source 21 and the second light source 22 is changing, the brightness of the second light source 22 reaches 0%, and only the brightness of the first light source 21 changes. There is a possibility that the change in the color of the light emitted from the light source unit 12 may appear discontinuous with the period during which the light source unit 12 is used.

On the other hand, in the lighting fixture 2 and the lighting device 10 according to the present embodiment, when the control unit 34 simultaneously performs the dimming control of the first light source 21 and the dimming control of the second light source 22, the first Even when the amount of change in the dimming degree of the light source 21 and the amount of change in the dimming degree of the second light source 22 are different, the time from the start of dimming of the first light source 21 to the end of dimming is set to Tp for a predetermined time, and the first 2 The time from the start of dimming of the light source 22 to the end of dimming is defined as Tp for a predetermined time.

As a result, in the lighting fixture 2 and the lighting device 10 according to the present embodiment, it is possible to suppress the occurrence of a period in which only the brightness of one of the first light source 21 and the second light source 22 changes. It is possible to prevent the change in color of the light emitted from the light source unit 12 from appearing to be different and to give a sense of discomfort to the user of the lighting fixture 2. Therefore, it is possible to provide the lighting fixture 2 and the lighting device 10 that suppress the unnatural change in the color of the light emitted from the light source unit 12 during the dimming control and the toning control.

Further, in the lighting fixture 2 and the lighting device 10 according to the present embodiment, when the control unit 34 simultaneously performs the dimming control of the first light source 21 and the dimming control of the second light source 22, the second light source 22 is used. The timing of the start of dimming is substantially the same as the timing of the start of dimming of the first light source 21. As a result, it is possible to more reliably suppress the occurrence of a period in which only the brightness of one of the first light source 21 and the second light source 22 changes. It is possible to more reliably suppress an unnatural change in the color of the light emitted from the light source unit 12 during dimming control and toning control.

4 (a) to 4 (c) are graphs schematically showing an example of the operation of the control unit.
FIG. 4A schematically shows an example of a dimming signal.
FIG. 4B schematically shows an example of a control signal of the first conversion circuit 31 input from the control unit 34 to the drive circuit 53.
FIG. 4C schematically shows an example of a control signal of the second conversion circuit 32 input from the control unit 34 to the drive circuit 54.
Although the illustration is simplified in FIGS. 4 (b) and 4 (c), the control signal of the first conversion circuit 31 and the control signal of the second conversion circuit 32 are, for example, the adjustment represented by the dimming signal. It is a PWM signal that changes the duty ratio according to the luminosity.

As shown in FIG. 4A, the dimming signal is input to the control unit 34 as a signal in which the first signal and the second signal are arranged in time series. Therefore, when receiving the dimming signal, the control unit 34 receives one of the first signal and the second signal first, and then receives the other of the first signal and the second signal. In this example, the control unit 34 receives the second signal after receiving the first signal. On the contrary, the control unit 34 may receive the first signal after receiving the second signal.

The control unit 34 starts timing the predetermined standby time from the timing when the reception of the dimming signal including the first signal and the second signal is completed (timing t1 in FIG. 4). In other words, the control unit 34 starts timing the predetermined standby time from the timing when the reception of the second signal input later is completed.

After receiving the first signal, the control unit 34 identifies the luminous intensity of the first light source 21 represented by the first signal during the standby time, and prepares to generate a control signal according to the identified luminous intensity. The control unit 34 performs dimming control at a predetermined time Tp from, for example, the amount of change (difference) between the dimming degree of the first light source 21 represented by the received first signal and the dimming degree of the current first light source 21. The rate of change in dimming intensity for this purpose is calculated during the standby time. Similarly, after receiving the second signal, the control unit 34 identifies the luminous intensity of the second light source 22 represented by the second signal during the standby time, and prepares to generate a control signal according to the identified luminous intensity. do.

The control unit 34 inputs a control signal based on the input first signal to the drive circuit 53 at the timing when a predetermined standby time has elapsed (timing t2 in FIG. 4) to control dimming with respect to the first light source 21. Is started, and the brightness of the first light source 21 is changed to the brightness corresponding to the dimming degree represented by the input first signal.

Similarly, the control unit 34 starts dimming control for the second light source 22 by inputting a control signal based on the input second signal to the drive circuit 54 at the timing when a predetermined standby time has elapsed. The brightness of the second light source 22 is changed to the brightness corresponding to the dimming degree represented by the input second signal.

In this way, the control unit 34 starts measuring the predetermined standby time from the timing when the reception of the dimming signal is completed, and at the timing when the predetermined standby time elapses, the dimming control for the first light source 21 and the second light source By starting the dimming control for 22, the brightness of the first light source 21 and the brightness of the second light source 22 are changed to the brightness corresponding to the dimming signal.

In this way, by setting the standby time between the completion of reception of the dimming signal and the start of the dimming control, it is possible to facilitate preparations such as generation of the control signal in the control unit 34. For example, the operation of the control unit 34 can be stabilized as compared with the case where the dimming control is started immediately after receiving the dimming signal.

If the standby time is set too long, the time from the input of the dimming signal to the switching of the brightness of the first light source 21 and the second light source 22 becomes long, which may give a sense of discomfort to the user or the like. .. On the other hand, if the standby time is too short, there is a concern that the operation of the control unit 34 may become unstable, for example, the control signal may not be set appropriately. Therefore, the waiting time is preferably set to, for example, about 1 ms or more and 5 ms or less. As a result, the operation of the control unit 34 can be stabilized, and it is possible to suppress giving a feeling of strangeness to the user or the like.

Further, as for the waiting time from the timing when the reception of the dimming signal is completed to the start of the dimming control for the second light source 22, the dimming control for the first light source 21 is started from the timing when the reception of the dimming signal is completed. It is substantially the same as the waiting time until. As a result, as described above, the timing of the start of dimming of the second light source 22 can be substantially the same as the timing of the start of dimming of the first light source 21.

However, as for the waiting time from the timing when the reception of the dimming signal is completed to the start of the dimming control for the second light source 22, the dimming control for the first light source 21 is started from the timing when the reception of the dimming signal is completed. It does not necessarily have to be the same as the waiting time until. For example, the waiting time for the first light source 21 for which the first signal is received first may be slightly shorter than the waiting time for the second light source 22 for which the second signal is received later. In this way, by shortening the waiting time on the receiving side first, the preparation period of the control unit 34 can be shortened, and it is possible to prevent the operation of the control unit 34 from becoming unstable. In this case, the difference between the waiting time for the first light source 21 and the waiting time for the second light source 22 is preferably 5 ms or less, for example. As a result, there is a period in which only the brightness of one of the first light source 21 and the second light source 22 changes, and it is possible to prevent the user from giving a sense of discomfort.

Further, for example, when the operation start timing of the first conversion circuit 31 and the operation start timing of the second conversion circuit 32 are simultaneously performed, the switching noise by the first conversion circuit 31 and the switching by the second conversion circuit 32 are performed. There is a possibility that the noise will overlap and the noise will increase. Therefore, in such a case, the timing of the dimming start of the second light source 22 is set to the timing of the dimming start of the first light source 21 by changing the length of the standby time as described above. It is preferable to shift it slightly.

In this way, when the timing of the start of dimming of the first light source 21 and the timing of the start of dimming of the second light source 22 are substantially the same, it is possible to prevent the user from giving a sense of discomfort. can do. When the timing of the dimming start of the first light source 21 and the timing of the dimming start of the second light source 22 are slightly deviated, the switching noise becomes large, and the first light source 21 and the second light source 22 become large. It is possible to suppress the influence on the brightness of the light source.

5 (a) to 5 (c) are graphs schematically showing an example of another operation of the control unit.
5 (a) to 5 (c) show a dimming signal, a control signal of the first conversion circuit 31, and a control signal of the second conversion circuit 32, similarly to FIGS. 4 (a) to 4 (c). An example is schematically shown.

As shown in FIGS. 5A to 5C, in this example, the control unit 34 clocks the first standby time from the timing when the reception of the first signal is completed (timing t11 in FIG. 5). Start. At the timing when the first standby time has elapsed (timing t12 in FIG. 5), the control unit 34 inputs a control signal based on the input first signal to the drive circuit 53 to control dimming with respect to the first light source 21. Is started, and the brightness of the first light source 21 is changed to the brightness corresponding to the dimming degree represented by the input first signal.

The control unit 34 starts timing the second standby time from the timing when the reception of the second signal is completed (timing t13 in FIG. 5). Then, at the timing when the second standby time has elapsed (timing t14 in FIG. 5), the control unit 34 inputs a control signal based on the input second signal to the drive circuit 54, thereby adjusting the second light source 22. The light control is started, and the brightness of the second light source 22 is changed to the brightness corresponding to the dimming degree represented by the input second signal.

In this way, the timing for starting the time counting of the standby time is not limited to the timing when the reception of the dimming signal is completed, but the first standby for the dimming control of the first light source 21 at the timing when the reception of the first signal is completed. The time counting may be started, and the time counting of the second standby time for the dimming control of the second light source 22 may be started at the timing when the reception of the second signal is completed. In this case, the length of the second standby time for the dimming control of the second light source 22 may be the same as or different from the length of the first standby time for the dimming control of the first light source 21.

6 (a) to 6 (c) are graphs schematically showing an example of another operation of the control unit.
6 (a) to 6 (c) show the dimming signal and the first conversion circuit 31 as in FIGS. 4 (a) to 4 (c) and FIGS. 5 (a) to 5 (c). An example of the control signal and the control signal of the second conversion circuit 32 is schematically shown.

As shown in FIGS. 6A to 6C, in this example, the control unit 34 receives the first signal input at the timing when the reception of the dimming signal is completed (timing t21 in FIG. 6). By inputting a control signal based on the above to the drive circuit 53, dimming control for the first light source 21 is started, and the brightness of the first light source 21 is adjusted to the brightness corresponding to the dimming degree represented by the input first signal. To change.

Further, the control unit 34 starts dimming control for the first light source 21 and starts timing of a predetermined standby time at the timing when the reception of the dimming signal is completed. Then, at the timing when the predetermined standby time has elapsed (timing t22 in FIG. 6), the control unit 34 inputs a control signal based on the input second signal to the drive circuit 54, thereby adjusting the second light source 22. The light control is started, and the brightness of the second light source 22 is changed to the brightness corresponding to the dimming degree represented by the input second signal.

Preparations such as a control signal based on the first signal input earlier may be possible during the reception period of the second signal input later. Therefore, in such a case, the standby time is set only for the signal input after the first signal and the second signal, and the dimming signal is received for the signal input first. Dimming control may be started at the completed timing. As a result, for example, it is possible to suppress the calculation load of the control unit 34 due to the timing of the standby time.

7 (a) to 7 (c) are graphs schematically showing an example of another operation of the control unit.
7 (a) to 7 (c) schematically show an example of a dimming signal, a control signal of the first conversion circuit 31, and a control signal of the second conversion circuit 32, similarly to FIGS. 4 to 6. show.

As shown in FIGS. 7 (a) to 7 (c), in this example, the control unit 34 clocks a predetermined standby time from the timing when the reception of the first signal is completed (timing t31 in FIG. 7). Start. The control unit 34 starts dimming control for the first light source 21 by inputting a control signal based on the input first signal to the drive circuit 53 at the timing when the standby time has elapsed (timing t32 in FIG. 7). Then, the brightness of the first light source 21 is changed to the brightness corresponding to the dimming degree represented by the input first signal.

The control unit 34 inputs a control signal based on the input second signal to the drive circuit 54 at the timing when the reception of the second signal is completed (timing t33 in FIG. 5), thereby dimming the light to the second light source 22. The control is started, and the brightness of the second light source 22 is changed to the brightness corresponding to the dimming degree represented by the input second signal.

In this way, the standby time is set only for the signal input first of the first signal and the second signal, and for the signal input later, at the timing when the reception of the dimming signal is completed. Dimming control may be started. Thereby, for example, even when the second signal is input after the first signal, the timing of the dimming start of the second light source 22 can be brought close to the timing of the dimming start of the first light source 21. For example, the timing of the start of dimming of the second light source 22 can be substantially the same as the timing of the start of dimming of the first light source 21. Therefore, it is possible to more reliably suppress the occurrence of a period in which only the brightness of one of the first light source 21 and the second light source 22 changes. It is possible to more reliably suppress an unnatural change in the color of the light emitted from the light source unit 12 during dimming control and toning control.

In the above embodiment, the lighting fixture 2 having two light sources, the first light source 21 and the second light source 22, is shown. The luminaire 2 is not limited to this, and may have three or more light sources. For example, it has a light source that irradiates red light, a light source that irradiates green light, and a light source that irradiates blue light, and irradiates light of various colors by mixing light of three colors. The time from the start of dimming to the end of dimming of each of the three light sources may be set as a predetermined time Tp.

Although some embodiments of the present invention have been described, these embodiments are presented as examples 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.

2 ... Lighting equipment, 10 ... Lighting device, 12 ... Light source unit, 21 ... First light source, 22 ... Second light source, 30 ... Power supply unit, 31 ... First conversion circuit, 32 ... Second conversion circuit, 34 ... Control unit , 40 ... filter circuit, 42 ... rectifier circuit, 44 ... inrush prevention circuit, 46 ... force factor improvement circuit, 48 ... smoothing capacitor, 50 ... control power supply circuit, 51 ... step-down circuit, 52-54 ... drive circuit, 55, 56 ... Output capacitor, 57, 58 ... Detection resistance

Claims (7)

It has a first light source and a second light source that irradiates light of a color different from that of the first light source, and is connected to a light source unit that mixes light emitted from each of the first light source and the second light source. A lighting device that supplies power to each of the first light source and the second light source to light the first light source and the second light source.
A first conversion that enables dimming control of the first light source by being electrically connected to the first light source, converting the supplied electric power, and supplying the converted electric power to the first light source. Circuit and
A second conversion that enables dimming control of the second light source by being electrically connected to the second light source, converting the supplied electric power, and supplying the converted electric power to the second light source. Circuit and
Upon receiving an input of a dimming signal including a first signal representing the dimming degree of the first light source and a second signal representing the dimming degree of the second light source, the first conversion is performed based on the first signal. By controlling the conversion of power by the circuit, the magnitude of the power supplied to the first light source is controlled, the first light source is turned on with the brightness corresponding to the first signal, and the second signal is transmitted. Based on this, by controlling the conversion of power by the second conversion circuit, the magnitude of the power supplied to the second light source is controlled, and the second light source is turned on with the brightness corresponding to the second signal. By individually controlling the brightness of the light emitted from the first light source and the brightness of the light emitted from the second light source according to the dimming signal, the light can be adjusted according to the dimming signal. A control unit that controls dimming and color matching of the light emitted from the light source unit,
Equipped with
When the control unit simultaneously performs dimming control of the first light source and dimming control of the second light source, the amount of change in the dimming degree of the first light source and the amount of change in the dimming degree of the second light source. Even if the above is different, the time from the start of dimming of the first light source to the end of dimming is set as the predetermined time, and the time from the start of dimming of the second light source to the end of dimming is set as the predetermined time. A lighting device characterized by that. When the control unit simultaneously performs the dimming control of the first light source and the dimming control of the second light source, the control unit sets the timing of the dimming start of the second light source to the dimming start of the first light source. The lighting device according to claim 1, wherein the timing is substantially the same. The control unit starts timing of a predetermined standby time from the timing when the reception of the dimming signal is completed, and at the timing when the predetermined standby time elapses, the dimming control for the first light source and the second light source are controlled. The lighting device according to claim 1 or 2, wherein the dimming control is started. The dimming signal is input to the control unit as a signal in which the first signal and the second signal are arranged in time series.
The control unit starts timing the first standby time from the timing when the reception of the first signal is completed, starts the dimming control for the first light source at the timing when the first standby time elapses, and the said. The first aspect of claim 1, wherein the time counting of the second standby time is started from the timing when the reception of the second signal is completed, and the dimming control for the second light source is started at the timing when the second standby time has elapsed. Lighting device. The dimming signal is a signal in which the first signal and the second signal are arranged in time series.
The second signal is input to the control unit after the first signal.
The control unit starts dimming control for the first light source at the timing when the reception of the dimming signal is completed, starts timing of a predetermined standby time, and at the timing when the predetermined standby time elapses. The lighting device according to claim 1, wherein the dimming control for the second light source is started. The dimming signal is a signal in which the first signal and the second signal are arranged in time series.
The second signal is input to the control unit after the first signal.
The control unit starts timing of a predetermined standby time from the timing when the reception of the first signal is completed, starts dimming control for the first light source at the timing when the standby time has elapsed, and the second. The lighting device according to claim 1 or 2, wherein the dimming control for the second light source is started at the timing when the reception of the signal is completed. A light source unit having a first light source and a second light source that irradiates light of a color different from that of the first light source, and mixing light emitted from each of the first light source and the second light source.
The lighting device according to any one of claims 1 to 6.
Lighting equipment equipped with.

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