CN108980682B

CN108980682B - Lighting apparatus

Info

Publication number: CN108980682B
Application number: CN201710397680.9A
Authority: CN
Inventors: 杨庆元
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2017-05-31
Filing date: 2017-05-31
Publication date: 2022-06-28
Anticipated expiration: 2037-05-31
Also published as: CN108980682A

Abstract

Provided is a lighting fixture, which can change lighting light in a plurality of lighting states and can make the lighting light more comfortable and bright by a user. A lighting fixture (1) for illuminating illumination light is provided with: a first light source (10) and a second light source (20) that emit light having color temperatures different from each other; and a circuit unit (30) that controls the first light source (10) and the second light source (20) in accordance with a control signal from the outside, wherein the circuit unit (30) controls the first light source (10) and the second light source (20) in a first control mode in which the color temperature of the illumination light changes in conjunction with a change in the luminance of the illumination light when the control signal is received as the first control signal, and controls the first light source (10) and the second light source (20) in a second control mode in which the color temperature of the illumination light is kept constant and the luminance of the illumination light is changed when the control signal is received as the second control signal.

Description

Lighting apparatus

Technical Field

The present invention relates to a lighting fixture.

Background

A lighting apparatus having a function of changing the color temperature of illumination light (so-called color-mixing function) according to the purpose of use, the state of use, or the like has been known (for example, see patent document 1).

A conventional lighting apparatus having a color adjusting function includes, for example: the light source includes a first light source and a second light source that emit lights of different color temperatures from each other, and a circuit unit that controls each of the first light source and the second light source. In such a lighting fixture, the color temperature of the illumination light emitted from the lighting fixture can be changed by dimming each of the first light source and the second light source by the circuit unit.

(Prior art document)

(patent document)

Patent document 1 Japanese laid-open patent publication No. 2009-110781

However, in the conventional lighting fixture, the state of change in the brightness of the illumination light is limited. Therefore, it is not possible to sufficiently satisfy the user's demand for changing the illumination light in various light conditions according to the illumination scene. For example, there is a demand for a wide variety of changes in the brightness and color temperature of illumination light as the state of brightness of the illumination light.

In addition, in the lighting fixture, if the state of the light intensity of the illumination light is changed in a complicated manner, it is difficult for the user to select illumination light with light intensity that can be comfortably perceived, and thus, it is difficult for the user to change to illumination light with light intensity that is comfortably perceived.

Disclosure of Invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a lighting apparatus which can change illumination light in a plurality of light-emitting states and can allow a user to easily change the illumination light to a comfortable light.

In order to achieve the above object, one aspect of the present invention provides a lighting apparatus for emitting illumination light, the lighting apparatus including: a plurality of light sources emitting lights having color temperatures different from each other; and a circuit unit that controls the plurality of light sources in accordance with a control signal from outside, wherein the circuit unit controls the plurality of light sources in a first control mode in which a color temperature of the illumination light is changed in conjunction with a change in luminance of the illumination light when receiving a first control signal as the control signal, and controls the plurality of light sources in a second control mode in which the color temperature of the illumination light is kept constant and the luminance of the illumination light is changed when receiving a second control signal as the control signal.

The present invention enables a user to change the illumination light to a comfortable light level easily while changing the illumination light to a plurality of light levels.

Drawings

Fig. 1 is a perspective view schematically showing an external appearance of a lighting fixture according to an embodiment.

Fig. 2 is a block diagram showing a functional configuration of the lighting apparatus according to the embodiment.

Fig. 3 is a schematic diagram of a remote controller attached to the lighting apparatus according to the embodiment.

Fig. 4 is a diagram showing a relationship between luminance and color temperature in the first control mode and the second control mode in the lighting fixture according to the embodiment.

Fig. 5 is a diagram for explaining a method of switching from the first control mode to the second control mode in the lighting fixture according to the embodiment.

Fig. 6 is a diagram for explaining a method of switching from the first control mode to the second control mode and then switching to the first control mode in the lighting fixture according to the embodiment.

Fig. 7 is a diagram for explaining another switching method for switching from the first control mode to the second control mode in the lighting apparatus according to the embodiment.

Detailed Description

The embodiments to be described below are all preferred specific examples of the present invention. Therefore, the numerical values, shapes, materials, constituent elements, arrangement positions of constituent elements, connection forms, and the like shown in the following embodiments are merely examples, and the present invention is not limited thereto. Therefore, components not described in the technical means showing the highest concept of the present invention among the components of the following embodiments will be described as arbitrary components.

Each figure is a schematic diagram, and is not strictly illustrated. Therefore, scales and the like in the respective drawings are not necessarily uniform. In each of the drawings, substantially the same components are denoted by the same reference numerals, and redundant description thereof will be omitted or simplified.

(embodiment mode)

First, a schematic configuration of the lighting fixture 1 according to the embodiment will be described with reference to fig. 1. Fig. 1 is a perspective view schematically showing an appearance of a lighting fixture 1 according to the embodiment.

As shown in fig. 1, the lighting fixture 1 in the present embodiment is, for example, a ceiling lamp installed on a ceiling of a building. The lighting fixture 1 irradiates white light as illumination light, for example, but the color of the illumination light is not limited to white light.

The lighting fixture 1 is capable of dimming and toning, and has a dimming function capable of adjusting the brightness (light amount) of the illumination light and a toning function capable of adjusting the color of the illumination light.

In the present embodiment, the lighting fixture 1 has a function of changing the light quantity of illumination light as white light as a dimming function. For example, by performing dimming control on the lighting fixture 1, the light quantity of the illumination light irradiated from the lighting fixture 1 can be made larger or smaller. This makes it possible to increase or decrease the illuminance of the illumination surface (e.g., the floor surface) of the illumination light.

The lighting fixture 1 has a function of changing the color temperature of the illumination light as white light as a color adjusting function. For example, by performing the color tuning control on the lighting fixture 1, the color temperature of the illumination light emitted from the lighting fixture 1 can be set high or low. Accordingly, it is possible to obtain cool bluish white bright illumination light having a fresh atmosphere or warm bright illumination light having a mild atmosphere.

The lighting fixture 1 receives a control signal from the outside, and thereby controls the light intensity state of the illumination light. For example, as shown in fig. 1, when a control signal is transmitted from the remote controller 2 to the lighting fixture 1 by using the remote controller 2, the state of the light intensity of the illumination light of the lighting fixture 1 changes. The bright state of the illumination light is, for example, the brightness (light quantity) and color temperature of the illumination light. Therefore, the control signal is, for example, a signal for changing the luminance and/or the color temperature of the illumination light of the lighting fixture 1. The control signal may be an infrared signal that is communicated by infrared rays, or a wireless signal that is wirelessly communicated by Bluetooth (registered trademark) or the like.

The lighting fixture 1 has a plurality of control modes different in the state of change of the light intensity of the illumination light. That is, the lighting fixture 1 changes the state of the light intensity of the illumination light according to the type of the control mode. In the present embodiment, the lighting fixture 1 has two control modes, a first control mode and a second control mode.

The first control mode is a control mode in which the color temperature of the illumination light changes in conjunction with a change in the luminance of the illumination light. That is, the first control mode is a synchronous color-mixing mode in which the luminance and the color temperature of the illumination light of the lighting fixture 1 change in conjunction with each other.

The second control mode is a control mode in which the color temperature of the illumination light is kept constant, while the luminance of the illumination light is changed. That is, the second control mode is a color temperature fixed mode in which the color temperature does not change even if the luminance of the illumination light of the lighting fixture 1 changes.

The switching between the first control mode and the second control mode can be performed by the user operating the remote controller 2. Specifically, when the user operates the remote controller 2, a control signal is transmitted from the remote controller 2 to the lighting fixture 1. Accordingly, the illumination light is irradiated in a bright state corresponding to the control signal while the first control mode and the second control mode are switched. In each of the first control mode and the second control mode, a control signal of each control mode is transmitted from the remote controller 2, and the state of the light intensity of the illumination light of the lighting fixture 1 is changed in accordance with the control signal. Next, a specific configuration of the lighting fixture 1 will be described with reference to fig. 2. Fig. 2 is a block diagram showing a functional configuration of the lighting apparatus 1 according to the embodiment. As shown in fig. 2, the lighting fixture 1 includes: a first light source 10, a second light source 20, a circuit unit 30, and a memory 40.

The first light source 10 and the second light source 20 emit light having different color temperatures from each other. For example, the first light source 10 emits white light of a first color temperature, and the second light source 20 emits white light of a second color temperature higher than the first color temperature. In the present embodiment, the first light source 10 emits white light of an eyeball color having a color temperature of 2700K (first color temperature), and the second light source 20 emits white light of a daylight color having a color temperature of 6500K (second color temperature). The illumination light of the illumination apparatus 1 is a combined light of the first light source 10 and the second light source 20. Therefore, by changing the ratio (light output ratio) of the light emitted from the first light source 10 to the light emitted from the second light source 20, the luminance and the color temperature of the illumination light of the lighting fixture 1 change.

The first light source 10 and the second light source 20 are LED light sources made of LEDs, for example. The LED light source may be, for example, an SMD type LED module in which one or more Surface Mount (SMD) type LED elements having LED chips (bare chips) packaged are mounted On a substrate, or a COB (Chip On Board) type LED module in which one or more LED chips (bare chips) are directly mounted On a substrate and sealed by a sealing member. The first light source 10 and the second light source 20 emit light by direct current supplied from the lighting circuit 31.

The circuit unit 30 controls the first light source 10 and the second light source 20 according to a control signal from the outside. For example, upon receiving a control signal transmitted from the remote controller 2, the circuit unit 30 controls the first light source 10 and the second light source 20 in accordance with the received control signal.

Specifically, when the circuit unit 30 receives a first control signal as a control signal, the first light source 10 and the second light source 20 are controlled in a first control mode (synchronous color-tuning mode) in which the luminance and the color temperature of the illumination light of the lighting fixture 1 change in an interlocking manner. That is, the first control signal controls the lighting fixture 1 as the first control mode of the synchronized toning mode. In the first control mode, the circuit unit 30 controls the first light source 10 and the second light source 20 so that the color temperature of the illumination light increases as the brightness of the illumination light of the lighting fixture 1 increases.

When the circuit unit 30 receives the second control signal as the control signal, the first light source 10 and the second light source 20 are controlled in a second control mode (color temperature fixed mode) in which the color temperature of the illumination light of the lighting fixture 1 is kept constant and the luminance of the illumination light is changed. That is, the second control signal controls the lighting fixture 1 in the second control mode of the color temperature fixing mode.

Further, the second control mode may include a plurality of color temperature modes in which the color temperatures of the illumination light of the lighting fixture 1 are different. At this time, when the circuit unit 30 receives a color temperature signal corresponding to a color temperature mode, which is one of the plurality of color temperature modes, as the second control signal, the first light source 10 and the second light source 20 are controlled to be dimmed in the one color temperature mode, whereby the luminance of the illumination light of the lighting fixture 1 can be changed at a fixed color temperature corresponding to the one color temperature mode.

In the present embodiment, the circuit unit 30 includes: a lighting circuit 31 for supplying power to the first light source 10 and the second light source 20, respectively; and a control circuit 32 for controlling the lighting circuit 31 in accordance with the input control signal.

For example, the control circuit 32 controls the lighting circuit 31 so that the lighting circuit 31 supplies electric power to each of the first light source 10 and the second light source 20 in accordance with a control signal transmitted from the remote controller 2. In this case, the lighting circuit 31 supplies power corresponding to the control signal to the first light source 10 and the second light source 20, respectively, under the control of the control circuit 32. That is, the lighting circuit 31 performs dimming control on each of the first light source 10 and the second light source 20. In this way, since the currents flowing into the first light source 10 and the second light source 20 change, the light output values of the first light source 10 and the second light source 20 change. As a result, the luminance and the color temperature of the combined light of the first light source 10 and the second light source 20 (i.e., the illumination light of the lighting fixture 1) change.

Specifically, when a first control signal as a control signal is input to the control circuit 32, the control circuit 32 controls the lighting circuit 31 in accordance with the first control signal, and the lighting circuit 31 supplies electric power to each of the first light source 10 and the second light source 20 so that the luminance and the color temperature of the illumination light of the luminaire 1 change in an interlocking manner. That is, the control circuit 32 and the lighting circuit 31 control the first light source 10 and the second light source 20 so that the illumination light changes in the state of being lighted in the synchronous tone mode.

When a second control signal, which is a control signal, is input to the control circuit 32, the control circuit 32 controls the lighting circuit 31 in accordance with the second control signal, and the lighting circuit 31 supplies power to each of the first light source 10 and the second light source 20 so that the color temperature of the illumination light of the luminaire 1 is fixed and the luminance of the illumination light is changed. That is, the control circuit 32 and the lighting circuit 31 control the first light source 10 and the second light source 20 so that the illumination light changes the light intensity state in the color temperature fixing mode.

The memory 40 is a storage unit that stores various information. The memory 40 may be a volatile storage device such as SRAM or DRAM, or may be a nonvolatile storage device such as a magnetic disk, optical disk, magneto-optical disk, or semiconductor memory.

As an example, the memory 40 may store a curve or a straight line showing a relationship between the luminance and the color temperature of the illumination light associated with each of the first control mode and the second control mode, or may store a program for controlling the illumination light in the first control mode or the second control mode. When switching from one control mode to another control mode, the memory 40 may store the luminance and color temperature of the illumination light in the one control mode before the switching. Further, information other than the above may be stored in the memory 40.

Next, a specific example of a control method and various control modes of the lighting fixture 1 using the remote controller 2 will be described with reference to fig. 3 and 4. Fig. 3 is a diagram showing operation keys of the remote controller 2 for controlling the lighting apparatus 1 in the embodiment. Fig. 4 shows a relationship between luminance and color temperature in the first control mode and the second control mode in the lighting fixture 1 according to the embodiment.

In addition, each point in fig. 4 shows a numerical value when the maximum light output is set as the 100% light output value for each of the first light source 10 (shown as "yellow" in the drawing) emitting white light having a color temperature of 2700K and the second light source 20 (shown as "white" in the drawing) emitting white light having a color temperature of 6500K. For example, at point a1, the light output value of the first light source 10 is 3.00% and the light output value of the second light source 20 is 0.01%. At this time, at the point a1, the color temperature of the combined light of the first light source 10 and the second light source 20 is 2700K.

As shown in fig. 3, the remote controller 2 has a plurality of operation keys for controlling the illumination light of the lighting fixture 1. Specifically, the remote controller 2 includes: a first control 51, a second control 52, a third control 53, and a fourth control 54. The remote controller 2 further includes: a first color key 51a and a second color key 51b, a first color key 55a and a second color key 55b, a power key 56, a night light key 57, and a bed key 58.

The first control key 51 is a switch for switching the lighting fixture 1 to the synchronous tone mode as the first control mode. Therefore, when the user presses the first control key 51, the first control signal is transmitted from the remote controller 2 to the circuit unit 30 of the lighting fixture 1, and the lighting fixture 1 is switched to the synchronous toning mode.

At this time, the illumination light of the lighting fixture 1 is controlled to have a luminance and a color temperature in the past synchronous tone mode as described below. For example, when switching from the synchronous tone mode to another control mode and then switching to the synchronous tone mode again, the circuit unit 30 controls the first light source 10 and the second light source 20 so that the luminance and the color temperature of the illumination light in the synchronous tone mode before switching to another control mode are achieved. The state of the illumination light of the lighting fixture 1 when switched to the synchronous tone mode is not limited to the state of the illumination light in the past synchronous tone mode. In the synchronous toning mode, as shown in fig. 4, the illumination light emitted from the lighting fixture 1 has a luminance and a color temperature corresponding to a point on a curve S connecting the point a1 and the point B3.

In the present embodiment, the illumination light at the point a1 has the minimum brightness and the minimum color temperature in the synchronized tone mode. The color temperature of the illumination light of the point a1 is 2700K. The illumination light of the point a1 has the lowest luminance and the lowest color temperature not only in the synchronous tone mode but also in the color temperature fixing mode.

In addition, in the case of the synchronous tone mode, the illumination light at the point B3 has the maximum luminance and the highest color temperature. The color temperature of the illumination light in the point B3 is 4600K. In the present embodiment, the illumination light at point B3 reaches the maximum brightness not only in the synchronous tone mode but also in the color temperature fixing mode.

In the synchronous tone mode, the luminance (light amount) and the color temperature of the illumination light of the lighting fixture 1 vary along the curve S. Specifically, in the synchronous tone mode, the illumination light is changed in such a manner that the luminance increases as the color temperature gradually increases, and the luminance decreases as the color temperature gradually decreases. In this way, by changing the illumination light in a bright state of the curve curved upward to the right as depicted in fig. 4, illumination light that changes to luminance and color temperature that are comfortable for a human can be realized. Further, if the illumination light is changed in a curved line curved downward to the right or in a straight bright state, the line depicted in fig. 4 gives a sense of discomfort. The control of the illumination light in the synchronous tone mode can be performed by the first and

second tone keys

51a and 51b of the remote controller 2.

Specifically, when the user presses the first color key 51a, the luminance of the illumination light decreases as the color temperature of the illumination light decreases (that is, the illumination light changes so as to approach the point a 1) by the number of times the user is pressed or the time the user is continuously pressed. That is, the first color key 51a has a function of reducing the color temperature of the illumination light in conjunction with the luminance.

When the user presses the second color key 51B, the luminance of the illumination light increases as the color temperature of the illumination light increases (that is, the illumination light changes so as to approach the point B3) in accordance with the number of times the user is pressed or the duration of pressing. That is, the second color key 51b has a function of increasing the color temperature of the illumination light in conjunction with the luminance.

In this way, when the user presses the first or second color key 51a or 51B, a control signal for changing the state of light is transmitted from the remote controller 2 to the circuit unit 30, and the circuit unit 30 starts operating, so that illumination light of the brightness and the color temperature on the curve S connecting the point a1 and the point B3 is obtained. That is, by controlling the light output values of the first light source 10 and the second light source 20 by the circuit unit 30, the illumination light of the luminance and the color temperature on the curve S can be realized.

The second control key 52, the third control key 53, and the fourth control key 54 are switches for switching to the second control mode, i.e., the color temperature fixing mode. Therefore, when the user presses any one of the second control key 52, the third control key 53, and the fourth control key 54, the second control signal is transmitted from the remote controller 2 to the circuit unit 30 of the lighting fixture 1, and the lighting fixture 1 is switched to the color temperature fixing mode.

At this time, the illumination light of the lighting fixture 1 is controlled to the color temperature corresponding to the input second control signal, and is controlled to the luminance in the control mode before switching without changing the luminance before and after switching as described below. For example, when the color temperature fixing mode is switched from the synchronized toning mode, the circuit unit 30 receives a color temperature signal corresponding to the color temperature fixing mode as the second control signal. In this case, the circuit unit 30 performs dimming control on each of the first light source 10 and the second light source 20 so that the color temperature specified by the color temperature signal corresponding to the color temperature fixed mode becomes the luminance in the synchronous tone mode before switching. The illumination light of the lighting fixture 1 when switched to the color temperature fixing mode may have a luminance other than the luminance of the illumination light in the control mode immediately before.

In the present embodiment, the second control mode (color temperature fixing mode) includes a plurality of color temperature modes in which the color temperatures of the illumination light of the lighting fixture 1 are different from each other. Specifically, as shown in fig. 4, the second control mode (color temperature fixing mode) includes three color temperature modes, i.e., a first color temperature mode, a second color temperature mode, and a third color temperature mode.

The first color temperature mode is a daily mode for irradiating illumination light of a color temperature used by a user on a daily basis. In the present embodiment, the color temperature of the illumination light in the first color temperature mode is 4600K. The first color temperature mode in which the color temperature of the illumination light is 4600K may be not only a daily mode but also a party mode or the like.

The second color temperature mode is a leisure mode, and illuminates illumination light of a color temperature that the user tends to relax. In the present embodiment, the color temperature of the illumination light in the second color temperature mode is lower than the color temperature of the illumination light in the first color temperature mode, specifically 3000K. The color temperature of the illumination light in the second color temperature mode is lower than the maximum color temperature in the first control mode (synchronous tone mode). By irradiating the illumination light in the second color temperature pattern by the lighting fixture 1, the user's comfort can be improved.

The third color temperature mode is a reading mode, and illuminates illumination light of a color temperature convenient for a user to read. In the present embodiment, the color temperature of the illumination light in the third color temperature mode is higher than the color temperature of the illumination light in the first color temperature mode, specifically 6200K. Also, the color temperature of the illumination light in the third color temperature mode is higher than the maximum color temperature of the first control mode (synchronized color tuning mode). The illumination light is irradiated in the third color temperature mode by the lighting fixture 1, so that the concentration of the user can be improved.

In this way, the color temperature fixing mode includes a plurality of color temperature modes, and the user can switch to an arbitrary color temperature mode to obtain illumination light of a desired color temperature according to the purpose of use, the state of use, or the like by selecting the second control key 52, the third control key 53, or the fourth control key 54.

For example, when the user presses the second control key 52, a second control signal for setting the color temperature of the illumination light to 4600K is transmitted to the lighting fixture 1, and the color temperature is switched to the first color temperature mode of 4600K as the color temperature fixing mode. In this case, as shown in fig. 4, the illumination light emitted from the lighting fixture 1 has a luminance and a color temperature (4600K) corresponding to a point on a straight line T1 connecting the point a3 and the point B3. The straight line T1 intersects the curve S at point B3. That is, the color temperature of the illumination light in the first color temperature mode is the same as the maximum color temperature of the first control mode (the synchronized toning mode).

In the color temperature fixing mode as the first color temperature mode, the color temperature of the illumination light of the lighting fixture 1 is kept at 4600K without changing, and only the luminance changes along the straight line T1. That is, the illumination light changes in a state of light on a line segment connecting the point a3 and the point B3.

In the present embodiment, the illumination light at the point a3 has the smallest luminance in the first color temperature mode in the color temperature fixed mode. Specifically, the illumination light at the point A3 has a color temperature of 4600K and the same luminance as the luminance at the point a 2.

The illumination light at the point B3 is the light having the maximum brightness in the first color temperature mode of the color temperature fixing mode. Specifically, the illumination light at the point B3 is light with a color temperature of 4600K and a brightness of the maximum light output of the lighting fixture 1.

In the first color temperature mode, the light output values of the first light source 10 and the second light source 20 can be adjusted by the circuit unit 30 in order to obtain illumination light of the brightness and the color temperature on the line segment connecting the point a3 and the point B3. In the present embodiment, in the first color temperature mode, the circuit unit 30 controls the first light source 10 and the second light source 20 such that the light outputs of the first light source 10 and the second light source 20 are the same and the light output ratio is maintained constant.

When the user presses the second control key 52, a second control signal for setting the color temperature of the illumination light to 3000K is transmitted to the lighting fixture 1, and the color temperature mode is switched to a second color temperature mode for setting the color temperature to 3000K as a color temperature fixed mode. In this case, as shown in fig. 4, the illumination light emitted from the lighting fixture 1 has a luminance and a color temperature (3000K) corresponding to a point on a straight line T2 connecting the point a2 and the point B2. The straight line T2 intersects the curve S.

In the color temperature fixing mode as the second color temperature mode, the color temperature of the illumination light of the lighting fixture 1 is kept at 3000K without changing, and only the luminance changes along the straight line T2. That is, the illumination light changes in a state of being bright on a line segment connecting the point a2 and the point B2.

In the present embodiment, the illumination light at the point a2 has the minimum brightness in the second color temperature mode among the color temperature fixed modes. Specifically, the color temperature of the illumination light at the point a2 is 3000K, and the luminance is the same as the luminance at the point a 1.

Further, the illumination light at the point B2 has the maximum brightness in the second color temperature mode among the color temperature fixed modes. The illumination light at the point B2 has a color temperature of 3000K and a lower luminance than that at the point B3. That is, the maximum luminance of the illumination light in the second color temperature mode is lower than the maximum luminance of the illumination light in the first control mode (synchronous tone mode).

In the second color temperature mode, the light output values of the first light source 10 and the second light source 20 can be adjusted by the circuit unit 30 in order to obtain illumination light of the brightness and the color temperature on the line segment connecting the point a2 and the point B2. In the present embodiment, in the second color temperature mode, the circuit unit 30 controls the first light source 10 and the second light source 20 such that the light output value of the first light source 10 is larger than the light output value of the second light source 20 and the light output ratio is maintained.

When the user presses the fourth control key 54, a second control signal for setting the color temperature of the illumination light to 6200K is transmitted to the lighting fixture 1, and the color temperature mode is switched to a third color temperature mode for setting the color temperature to 6200K as a color temperature fixed mode. In this case, as shown in fig. 4, the illumination light emitted from the lighting fixture 1 has a luminance and a color temperature (6200K) corresponding to a point on a straight line T3 connecting the point a4 and the point B4. The straight line T3 does not intersect the curve S.

In the color temperature fixing mode as the third color temperature mode, the illumination light of the lighting fixture 1 is such that the color temperature is kept at 6200K without changing, and only the luminance changes along the straight line T3. That is, the illumination light changes in a bright state on a line segment connecting the point a4 and the point B4.

In the present embodiment, the illumination light of the point a4 has the minimum brightness in the third color temperature mode among the color temperature fixed modes. Specifically, the color temperature of the illumination light at the point a4 is 6200K, and the luminance is the same as the luminance at the points a1 and a 2.

Also, the illumination light of the point B4 has the maximum luminance in the case of the third color temperature mode in the color temperature fixed mode. Specifically, the color temperature of the illumination light at the point B4 is 6200K, and the luminance is lower than that at the point B3. That is, the maximum luminance of the illumination light in the third color temperature mode is lower than the maximum luminance of the illumination light in the first control mode (synchronous tone mode).

In the third color temperature mode, the light output values of the first light source 10 and the second light source 20 can be adjusted by the circuit unit 30 in order to obtain illumination light of the luminance and the color temperature on the line segment connecting the point a4 and the point B4. In the present embodiment, in the third color temperature mode, the circuit unit 30 controls the first light source 10 and the second light source 20 such that the light output value of the second light source 20 is larger than the light output value of the first light source 10 and the light output ratio is maintained.

Further, the control of the luminance of the illumination light in the color temperature fixing mode of each color temperature of 3000K, 4600K, 6200K can be performed by the first and

second dimming keys

55a and 55b of the remote controller 2.

Specifically, when the user presses the first dimming key 55a, the illumination light changes so that the color temperature does not change but the brightness increases in accordance with the number of times it is pressed or the duration of pressing. That is, the first dimming key 55a has a function of brightening only the luminance of the illumination light. For example, in the second color temperature mode having a color temperature of 3000K, when the first dimming key 55a is pressed, the color temperature of the illumination light is maintained at 3000K, and only the luminance is increased along the straight line T2 (that is, the illumination light is changed so as to be closer to the point B2).

When the user presses the second dimming key 55b, the illumination light changes so that the color temperature does not change and the brightness decreases according to the number of times the second dimming key is pressed or the duration of the pressing. That is, the second dimming key 55b has a function of dimming only the brightness of the illumination light. For example, in the second color temperature mode having a color temperature of 3000K, when the second dimming key 55b is pressed, the color temperature of the illumination light is kept at 3000K, and only the luminance is dimmed along the straight line T2 (that is, the illumination light changes so as to approach the point a2 side).

In the present embodiment, the first and

second dimming keys

55a and 55b can be used not only in the case of the color temperature fixing mode but also in the case of the synchronous color tuning mode. In this case, when the first dimming key 55a is pressed in the synchronous dimming mode, the luminance and the color temperature of the illumination light increase in conjunction with each other. When the second dimming key 55b is pressed in the synchronous dimming mode, the luminance and the color temperature of the illumination light are reduced in conjunction with each other.

The power key 56 is a switch for controlling the power on and off of the lighting apparatus 1. For example, when the power key 56 is pressed when the lighting fixture 1 is turned off, the lighting fixture 1 is turned on. When the power key 56 is pressed at the time of lighting the lighting fixture 1, the lighting fixture 1 is turned off.

The night light key 57 is a switch for switching to a night light mode. For example, when the night light key 57 is pressed once, the first night light mode is switched, and the illumination light emitted by the lighting fixture 1 corresponds to the luminance and the color temperature at point C1 in fig. 4. The illumination light of the point C1 has the same color temperature and a small luminance as compared with the point a1, which is the minimum light output in the synchronous tone mode. Therefore, in the case of changing from the point a1 to the point C1, the illumination light color temperature does not change, but only the luminance becomes dark.

When the night light key 57 is further pressed (that is, the night light key 57 is pressed twice) when the illumination light is in the bright state at the point C1, the mode is switched to the second night light mode, and the illumination light emitted by the lighting fixture 1 corresponds to the luminance and the color temperature at the point D1 in fig. 4. The illumination light at the point D1 has the same color temperature and a lower brightness than the illumination light at the point C1. Therefore, when the illumination light changes from the point C1 to the point D1, the color temperature of the illumination light does not change, and only the brightness becomes dark. That is, the illumination light of the point D1 is dimmed in two stages with respect to the illumination light of the point a1, that is, the luminance changes from the point a1 to the point C1, and further changes from the point C1 to the point D1.

The sleep key 58 is a switch for switching to the sleep mode. When the sleep key 58 is pressed, the mode is switched to the sleep mode, and when a certain time has elapsed after the sleep key 58 is pressed, the lighting fixture 1 is automatically turned off.

As described above, in the lighting fixture 1 of the present embodiment, the circuit unit 30 controls the first light source 10 and the second light source 20 in the first control mode in which the luminance of the illumination light changes in conjunction with the color temperature when receiving the first control signal as the control signal from the outside, and controls the first light source 10 and the second light source 20 in the second control mode in which the luminance of the illumination light changes while the color temperature of the illumination light is kept unchanged when receiving the second control signal as the control signal from the outside.

In this way, the lighting fixture 1 has a first control mode in which the luminance of the illumination light changes in conjunction with the color temperature, and a second control mode in which the luminance of the illumination light changes while the color temperature of the illumination light is kept constant. Accordingly, the illumination light can be changed to illumination light of a light intensity that is comfortable for the user, while being changed in a plurality of light intensity states.

Specifically, in the present embodiment, as shown in fig. 4, since the lighting demand of the user for the bright state (brightness and color temperature) is summarized as one curve of three straight lines, it is not necessary for the user to set the brightness and the color temperature in person.

Furthermore, by switching the control mode by the remote controller 2, the user can easily set a desired lighting scene. Therefore, the lighting requirements of the user can be met.

In the present embodiment, the user can freely adjust the light intensity state by switching between the first control mode and the second control mode. Accordingly, it is possible to perform setting more suitable for the lighting scene of the user while ensuring the degree of freedom of setting by the user.

In the lighting apparatus 1 according to the present embodiment, the circuit unit 30 includes: a lighting circuit 31 for supplying power to the first light source 10 and the second light source 20, respectively; and a control circuit 32 for controlling the lighting circuit 31 in accordance with the input control signal. When the first control signal is input to the control circuit 32 as the control signal, the control circuit 32 controls the lighting circuit 31 in accordance with the first control signal, and the lighting circuit 31 supplies electric power to each of the first light source 10 and the second light source 20 to change the color temperature of the illumination light in conjunction with the change in the luminance of the illumination light. When the second control signal is input to the control circuit 32 as the control signal, the control circuit 32 controls the lighting circuit 31 in accordance with the second control signal, and the lighting circuit 31 supplies electric power to each of the first light source 10 and the second light source 20, thereby changing the luminance of the illumination light while maintaining the color temperature of the illumination light.

In this way, in the present embodiment, since the power supplied to the first light source 10 and the second light source 20 is controlled simultaneously, the state of the illumination light of the lighting fixture 1 can be smoothly switched. Specifically, since the first light source 10 and the second light source 20 are formed of LEDs, the first light source 10 and the second light source 20 are subjected to color-adjusting and light-adjusting control by controlling the average current supplied to the first light source 10 and the second light source 20, respectively.

Next, a specific example of a method of switching the control mode in the lighting fixture 1 will be described with reference to fig. 5 to 7. Fig. 5 is a diagram for explaining a method of switching from the first control mode to the second control mode in the lighting fixture 1 according to the embodiment. Fig. 6 is a diagram for explaining a method of switching to the first control mode after switching from the first control mode to the second control mode in the lighting fixture 1. Fig. 7 is a diagram for explaining another switching method for switching from the first control mode to the second control mode in the lighting fixture 1.

As shown in fig. 5, in the present embodiment, when switching from the first control mode, which is the synchronized toning mode, to the second control mode, which is the color temperature fixing mode, the illumination light is controlled so that the luminance does not change before and after the switching. In this case, the circuit unit 30 controls the first light source 10 and the second light source 20 so that the color temperature of the illumination light changes without changing the brightness of the illumination light before and after switching.

For example, as shown in fig. 5, when the brightness and color temperature of the illumination light emitted in the simultaneous tone mode correspond to point P1 on the curve S, the second control key 52 is pressed, and the illumination light is switched from the simultaneous tone mode to the first color temperature mode in the color temperature fixed mode. At this time, the circuit unit 30 controls the first light source 10 and the second light source 20 so that the illumination light is in a light-on state corresponding to the point P2 on the straight line T1 having the same luminance as the point P1.

In this way, the illumination light is controlled to switch from the synchronized tone mode to the color temperature fixing mode in such a manner that the luminance is constant before and after the switching. Such variations do not give the user an unpleasant or irritating sensation.

When the color temperature fixing mode is switched to the color temperature fixing mode and then the color temperature fixing mode is switched to the color temperature synchronizing mode (that is, when the color temperature fixing mode is returned to the color synchronizing mode), the illumination light is controlled to return to the color temperature fixing mode and the luminance and the color temperature in the color synchronizing mode as shown in fig. 6. In this case, the circuit unit 30 controls the first light source 10 and the second light source 20 to switch the illumination light to the luminance and the color temperature in the color tone mode before the color temperature fixed mode.

For example, as shown in fig. 6, after the state of the illumination light is switched from the point P1 on the curve S in the synchronized tone mode to the first color temperature mode of the color temperature fixing mode, the luminance thereof changes in the first color temperature mode. When the color temperature changes to the point P3 on the straight line T1, the first control key 51 is pressed, and the illumination light is switched from the color temperature fixing mode to the synchronized tone mode. At this time, the circuit unit 30 controls the first light source 10 and the second light source 20 to switch the illumination light to the luminance and the color temperature of the point P1 in the color temperature fixing mode.

Thus, the illumination light comfortable to the user can be returned. That is, the brightness and color temperature of the illumination light in the previous synchronous tone mode are considered to be a bright state that the user feels comfortable, and the adjustment by the user is completed. Therefore, the user can easily return comfortable illumination light by simply switching to the luminance and the color temperature in the color temperature fixed mode and the color temperature in the color tone mode.

When the synchronous toning mode is switched to the color temperature fixing mode, the brightness and the color temperature of the point P1 in the synchronous toning mode are stored in the memory 40. Accordingly, when the color temperature fixing mode is returned to the synchronous toning mode, the first light source 10 and the second light source 20 can be controlled by simply reading the luminance and the color temperature of the point P1 from the memory 40 by the circuit unit 30 (specifically, the control circuit 32).

Further, as shown in fig. 7, when the illumination light is switched from the synchronized color tuning mode to the color temperature fixing mode, if the luminance before switching is larger than the maximum luminance in the color temperature fixing mode after switching, the illumination light may be switched to the maximum luminance in the color temperature fixing mode. In this case, the circuit unit 30 controls the first light source 10 and the second light source 20 to switch the illumination light to the maximum luminance in the color temperature fixing mode.

For example, as shown in fig. 7, when the illumination light whose luminance and color temperature correspond to the point Q1 on the curve S is emitted in the synchronized toning mode, the third control key 53 is pressed to switch from the synchronized toning mode to the second color temperature mode in the color temperature fixing mode, and the luminance before switching is greater than the maximum luminance in the second color temperature mode after switching, so that the circuit unit 30 controls the first light source 10 and the second light source 20 to switch the illumination light to the luminance and the color temperature at the point B2 of the maximum luminance in the second color temperature mode.

Accordingly, since a large change in luminance before and after switching can be suppressed, the user does not feel unpleasant or irritating.

(modification example)

The lighting device according to the present invention has been described above based on the embodiments, but the present invention is not limited to the embodiments.

For example, in the above-described embodiment, as shown in fig. 5, when the color temperature fixing mode (second control mode) is switched from the synchronized color tuning mode (first control mode), the luminance of the illumination light does not change before and after the switching, but the present invention is not limited thereto. Specifically, when switching from the color temperature fixing mode (second control mode) to the synchronized toning mode (first control mode), the illumination light may be controlled so that the brightness does not change before and after the switching.

In this case, when the color temperature fixing mode is switched from the synchronized toning mode again (when the color temperature fixing mode is returned), the illumination light may be switched to the brightness and the color temperature in the color temperature fixing mode before the synchronized toning mode. In this case, the circuit unit 30 controls the first light source 10 and the second light source 20 to switch to the luminance and the color temperature in the color temperature fixing mode in the preamble color adjusting mode.

In the above-described embodiment, as shown in fig. 7, when the illumination light is switched from the synchronized color tuning mode to the color temperature fixing mode, if the luminance before switching is larger than the maximum luminance in the color temperature fixing mode after switching, the illumination light is switched to the maximum luminance in the color temperature fixing mode, but the invention is not limited thereto.

Further, when the mode is switched from one to the other, the control of the illumination light is not limited to the mode in which the luminance is not changed before and after the switching, and the illumination light may be controlled so that the luminance is not changed before and after the switching when the mode is switched from one of the plurality of color temperature modes in the color temperature fixed mode to the other.

In this case, when the luminance of the illumination light before switching is larger than the maximum luminance in the color temperature mode after switching, the circuit unit may control the illumination light to be the maximum luminance in the color temperature mode after switching.

In the above-described embodiment, the lighting fixture 1 includes two light sources, i.e., the first light source 10 and the second light source 20, but the present invention is not limited thereto. For example, the lighting fixture 1 may include three or more light sources that emit light of different color temperatures from each other.

In the above-described embodiment, the lighting fixture 1 has two control modes, i.e., the synchronous color tuning mode and the color temperature fixing mode, but the present invention is not limited thereto. The lighting fixture 1 may have a third mode other than the synchronous color tuning mode and the color temperature fixing mode, and may have more control modes.

In the above-described embodiment, the lighting apparatus 1 can be controlled by the dedicated remote controller 2, but the present invention is not limited thereto. For example, the lighting apparatus 1 may be controllable by a portable terminal other than a dedicated remote controller such as a smartphone. The lighting apparatus 1 may be controlled not only by the portable terminal but also by a wall control device.

In the above-described embodiment, the illumination light is changed so as to follow the curve S shown in fig. 4 in the synchronous tone mode, but the present invention is not limited thereto, and the illumination light may be changed along a straight line extending in the upper right direction. For example, in the synchronous toning mode, the illumination light may vary along a line segment connecting point a1 and point B3.

In the above-described embodiment, the lighting fixture 1 is a ceiling lamp installed on a ceiling, but the present invention is not limited thereto. For example, the lighting apparatus 1 may be a downlight embedded in a ceiling or a spot light, and may be applied to various lighting apparatuses.

In addition, the embodiments obtained by implementing various modifications that can be conceived by those skilled in the art to the above-described embodiments or the embodiments obtained by combining the constituent elements and functions in the embodiments are included in the scope of the present invention without departing from the gist of the present invention.

Description of the symbols

1 Lighting appliance

2 remote controller

10 first light source

20 second light source

30 circuit unit

31 lighting circuit

32 control circuit

40 memory

51 first control key

51a first toning key

51b second toning key

52 second control key

53 third control key

54 fourth control key

55a first dimming key

55b second dimming key

56 power key

57 night lamp key

58 keys for sleeping

Claims

1. A lighting fixture for illuminating illumination light,

the lighting device is provided with:

a plurality of light sources emitting lights having color temperatures different from each other; and

a circuit unit for controlling the plurality of light sources according to an external control signal,

the circuit unit is provided with a plurality of circuit units,

controlling the plurality of light sources in a first control mode in which the color temperature of the illumination light is changed in conjunction with a change in luminance of the illumination light when a first control signal is received as the control signal,

controlling the plurality of light sources in a second control mode in which the luminance of the illumination light is changed while the color temperature of the illumination light is kept constant, when a second control signal is received as the control signal,

Switching from the second control mode to the first control mode by a first switch,

switching from the first control mode to the second control mode by a second changeover switch,

the second control mode includes at least a color temperature mode in which the color temperature of the illumination light is lower than the maximum color temperature of the first control mode and the color temperature of the illumination light is higher than the minimum color temperature of the first control mode,

the maximum luminance of the illumination light in the color temperature mode is brighter than the luminance of the illumination light in the first control mode corresponding to the color temperature of the color temperature mode.

2. The lighting fixture of claim 1, wherein the light source is a light source,

the circuit unit includes:

a lighting circuit that supplies power to each of the plurality of light sources; and

a control circuit for controlling the lighting circuit according to the input control signal,

wherein the control circuit controls the lighting circuit in accordance with the first control signal when the first control signal as the control signal is input to the control circuit, the lighting circuit supplies power to each of the plurality of light sources so as to change the color temperature of the illumination light in conjunction with a change in luminance of the illumination light,

When the second control signal as the control signal is input to the control circuit, the control circuit controls the lighting circuit to supply power to each of the plurality of light sources so that the color temperature of the illumination light is kept constant and the luminance of the illumination light is changed in accordance with the second control signal.

3. The lighting fixture of claim 1, wherein the light source is a light source,

a plurality of color temperature modes in which the color temperature of the illumination light is different are included in the second control mode,

the circuit unit may be configured to change the luminance of the illumination light at a constant color temperature corresponding to one of the plurality of color temperature modes by performing dimming control on each of the plurality of light sources in the one color temperature mode when the second control signal is received as a color temperature signal corresponding to the one of the plurality of color temperature modes.

4. The lighting fixture of claim 3, wherein the light source is a light source,

the plurality of color temperature modes include a first color temperature mode in which the color temperature of the illumination light is the same as the maximum color temperature of the first control mode.

5. The lighting fixture of claim 3 or 4,

the plurality of color temperature modes include a second color temperature mode in which the color temperature of the illumination light is lower than the maximum color temperature of the first control mode, and a third color temperature mode in which the color temperature of the illumination light is higher than the maximum color temperature of the first control mode.

6. The lighting fixture of claim 5, wherein the light source is a light source,

the maximum luminance of the illumination light in at least one of the second color temperature mode and the third color temperature mode is lower than the maximum luminance of the illumination light in the first control mode.

7. The lighting fixture of claim 3 or 4,

in at least one color temperature mode of the plurality of color temperature modes, the circuit unit controls the plurality of light sources so that the light output amounts of the plurality of light sources are the same and the light output ratio is maintained constant.

8. The lighting fixture of any one of claims 1 to 4,

in the first control mode and the second control mode, when switching from one mode to the other mode, the circuit unit controls the plurality of light sources such that the color temperature of the illumination light changes without changing the luminance of the illumination light before and after the switching.

9. The lighting fixture of any one of claims 1 to 4,

in the first control mode and the second control mode, when the luminance of the illumination light before switching is higher than the maximum luminance in the control mode after switching in a case where the mode is switched from one to the other, the circuit unit controls the plurality of light sources so that the luminance of the illumination light becomes the maximum luminance in the control mode after switching.

10. The lighting fixture as set forth in claim 3,

when switching from one of the plurality of color temperature modes to another color temperature mode, the circuit unit controls the plurality of light sources so that the color temperature of the illumination light is changed without changing the luminance of the illumination light before and after the switching.

11. The lighting fixture as set forth in claim 3,

when switching from one of the plurality of color temperature modes to another color temperature mode, the circuit unit controls the plurality of light sources so that the luminance of the illumination light becomes the maximum luminance in the another color temperature mode after switching when the luminance of the illumination light before switching is larger than the maximum luminance in the another color temperature mode after switching.

12. The lighting fixture of any one of claims 1 to 4,

when the control mode is switched from the first control mode to the second control mode and then from the second control mode to the first control mode, the circuit unit controls the plurality of light sources such that the illumination light has the luminance and the color temperature of the illumination light in the first control mode before the switching to the second control mode.

13. The lighting fixture of any one of claims 1 to 4,

the circuit unit controls the plurality of light sources such that the brighter the luminance of the illumination light, the higher the color temperature of the illumination light in the first control mode.

14. The lighting fixture as set forth in claim 3,

including, among the plurality of color temperature modes, a second color temperature mode in which the color temperature of the illumination light is lower than the maximum color temperature of the first control mode, and a third color temperature mode in which the color temperature of the illumination light is higher than the maximum color temperature of the first control mode,

the color temperature of the second color temperature mode is higher than the minimum color temperature of the first control mode.

15. The lighting fixture of claim 14, wherein the light source is a light source,

including a first color temperature mode in which a color temperature of the illumination light is the same as a maximum color temperature of the first control mode among the plurality of color temperature modes,

the first color temperature mode has a color temperature greater than that of the second color temperature mode and less than that of the third color temperature mode.