CN104896362B - lighting device - Google Patents

Abstract

The present invention provides a lighting device including a first light source emitting light of a first color temperature, a second light source emitting light of a second color temperature different from the first light source, and a power supply unit. The power supply unit supplies electric power to the first light source and the second light source to emit light, and changes the color of the illumination light obtained by mixing the light from the first light source and the light from the second light source within a predetermined color reproduction range. The power supply unit is controlled so that the upper limit side of the color reproduction region has a peak on at least one of the high color temperature side and the low color temperature side, and the peak value is on the high color temperature side and the low color temperature side. continuous between sides.

Description

lighting device

technical field

Embodiments of the present invention relate to a lighting device that changes the color of lighting light.

Background technique

Conventionally, there is a lighting fixture that includes two types of light sources with different color temperatures, and a power supply unit that supplies power to each of the light sources. The power supply unit performs dimming control of each light source to change the color of the illumination light.

In such a lighting fixture, the color of the illumination light obtained by mixing the lights emitted by the two light sources can be changed within a predetermined color reproduction area, but the color of the color reproduction area is between the side with a high color temperature and the side with a low color temperature. The peak of the beam is produced at an intermediate color temperature. That is, the peak value of the luminous flux occurs at the color temperature of the state where the two light sources are fully lit.

If the color is changed to a side higher or lower than the color temperature of the peak value of the light beam, one of the two light sources will be dimmed, and thus the light beam will be weakened.

Therefore, if the color of the illumination light is changed, the luminous flux will change greatly, so the change in brightness may give a sense of incongruity. Furthermore, when selecting a lighting fixture, the value of the light beam is used as a reference, but if the color of the lighting light is changed, the value of the light beam will change greatly, so it is difficult to select a lighting fixture.

Contents of the invention

[Problems to be Solved by the Invention]

If the color of the illumination light is changed, there is a problem that the luminous flux changes greatly.

The problem to be solved by the present invention is to provide an illuminating device with little change in light flux even when the color is changed.

[Technical means to solve the problem]

A lighting device according to an embodiment includes: a first light source emitting light of a first color temperature; a second light source emitting light of a second color temperature different from the first light source; and a power supply unit. The power supply unit supplies power to the first light source and the second light source to emit light, and changes the color of the illumination light obtained by mixing the light from the first light source and the light from the second light source within a predetermined color reproduction range. The power supply unit is controlled so that the upper limit side of the color reproduction region has a peak on at least one of the high color temperature side and the low color temperature side, and the peak value is on the high color temperature side and the low color temperature side. continuous between sides.

[Effect of the invention]

According to the present invention, even if the color is changed, the light beam does not change greatly, and it is expected to change the color without a sense of strangeness.

Description of drawings

FIG. 1 is a graph (graph) showing the relationship between reproducible color temperature and relative light output of an illumination device according to one embodiment.

Fig. 2 is a wiring diagram of a light source unit (unit) of the lighting device.

Fig. 3 is a wiring diagram of an appliance unit of the lighting device.

Fig. 4 is a perspective view of the lighting device.

5 is a graph showing another example of the relationship between the reproducible color temperature and the relative light output of the lighting device.

6 is a graph showing still another example of the relationship between reproducible color temperature and relative light output of the lighting device.

[explanation of the symbol]

10: lighting device

11: Light source unit

12: appliance unit

15: Support body

16: Lighting module

17: Translucent cover

18: Installation Department

24: Substrate

25: 1st light-emitting element

26: The second light-emitting element

28, 29: Terminal part

30: 1st input terminal

31: 2nd input terminal

32, 34: light source connection part

33, 35, 68, 69, 72, 73: connection line

37: 1st light source

38: 2nd light source

50: appliance body

51: 1st Power Supply Unit

51a: 1st power supply terminal

51b: 1st signal terminal

51c: 1st output terminal

52: The second power supply unit

52a: 2nd power supply terminal

52b: 2nd signal terminal

52c: 2nd output terminal

53: Power terminal block

54: Dimming terminal block

55: Support part

57, 58: Converter

59, 60: Control Department

66a: 1st power supply line

66b: 2nd power supply line

67a: 1st signal line

67b: 2nd signal line

70, 71: Appliance connection part

A: Color reproduction area

D: lower limit side

P1, P2: peak value

U: upper limit side

Detailed ways

A lighting device according to an embodiment includes: a first light source emitting light of a first color temperature; a second light source emitting light of a second color temperature different from the first light source; and a power supply unit. The power supply unit supplies power to the first light source and the second light source to emit light, and changes the color of the illumination light obtained by mixing the light from the first light source and the light from the second light source within a predetermined color reproduction range. The power supply unit is controlled so that the upper limit side of the color reproduction region has a peak on at least one of the high color temperature side and the low color temperature side, and the peak value is on the high color temperature side and the low color temperature side. continuous between sides.

Depending on the lighting device, even if the color is changed, the light beam does not change greatly, and it is expected to change the color without a sense of incongruity.

Hereinafter, an embodiment will be described with reference to FIGS. 1 to 4 .

As shown in FIG. 4 , the lighting device 10 includes a light source unit 11 and an appliance unit 12 for detachably installing the light source unit 11 . Furthermore, the appliance unit 12 is installed on a ceiling or the like, and the light source unit 11 is attached to a lower portion of the appliance unit 12 .

Moreover, the light source unit 11 includes: a strip-shaped support body 15, a light-emitting module (module) 16 installed on the lower surface of the support body 15, and a light-transmitting cover (cover) that covers the light-emitting module 16 and is installed on the support body 15. 17, and a plurality of mounting parts 18 for mounting the light source unit 11 to the appliance unit 12, and the like.

As shown in FIG. 2 , the light emitting module 16 includes a substrate 24 and a first light emitting element 25 and a second light emitting element 26 mounted on the surface of the substrate 24 .

A first wiring pattern (pattern) and a second wiring pattern are formed on the surface of the substrate 24, and the first light-emitting element 25 and the second light-emitting element 26 are mounted on these first wiring pattern and second light-emitting element 26 in a state of being electrically connected, respectively. 2 wiring patterns. The first light emitting element 25 and the second light emitting element 26 are connected in series by a first wiring pattern and a second wiring pattern, respectively.

The substrate 24 is divided into four parts in the longitudinal direction, and adjacent substrates 24 are electrically connected by a connector or the like. Terminal portions 28 and terminal portions 29 are respectively provided at both ends in the longitudinal direction of the light emitting module 16 . One of the pair of first input terminals 30 and one of the pair of second input terminals 31 are respectively provided on the terminal portion 28 on one end side, and one of the pair of first input terminals 30 is respectively provided on the terminal portion 29 on the other end side. The other of the pair and the other of the pair of second input terminals 31. The first light emitting element 25 is electrically connected between a pair of first input terminals 30 , and the second light emitting element 26 is electrically connected between a pair of second input terminals 31 .

The light source connection part 32 at one end is connected to the terminal part 28 at one end with a connection wire 33 , and the light source connection part 34 at the other end is connected to the terminal part 29 at the other end with a connection wire 35 . The light source connecting portion 32 on one end side includes a receptacle housing having a three-terminal structure, and the light source connecting portion 34 on the other end side includes a receptacle housing having a four-terminal structure. Moreover, the light source connection part 32 and the light source connection part 34 can be drawn out to the outside of the support body 15 by the connection wire 33 and the connection wire 35, and can be connected to the appliance unit 12 side.

The first light emitting element 25 and the second light emitting element 26 emit lights of different color temperatures. In the present embodiment, the first light emitting element 25 emits light at a color temperature of daylight white, and the second light emitting element 26 emits light at a color temperature of light bulb color. These light emitting elements 25 and 26 include, for example, light emitting diodes (Light Emitting Diode, LED) or organic electroluminescence (Electroluminescence, EL). The first light-emitting elements 25 are mounted on one side of the width direction of the substrate 24 at predetermined intervals along the longitudinal direction of the substrate 24, and the second light-emitting elements 26 are mounted on the other side of the width direction of the substrate 24 along the length of the substrate 24. They are installed at predetermined intervals in the longitudinal direction.

Furthermore, the first light emitting element 25 is a first light source 37 that emits light of a predetermined color temperature, and the second light emitting element 26 is a second light source 38 that emits light of a color temperature different from that of the first light source 37 .

Next, as shown in FIG. 3 and FIG. 4 , the appliance unit 12 includes a strip-shaped appliance body 50, and includes a first power supply unit 51 and a second power supply unit 52 disposed in the appliance body 50 as a power supply unit, and Power supply terminal block 53, dimming terminal block 54, etc.

A plurality of support portions 55 for attaching the respective attaching portions 18 of the light source unit 11 are attached to the fixture main body 50 .

The first power supply unit 51 supplies power to the first light source 37 , which is the first light emitting element 25 , and the second power supply unit 52 supplies power to the second light source 38 , which is the second light emitting element 26 . At one end of the first power supply unit 51 and the second power supply unit 52, a first power supply terminal 51a and a second power supply terminal 52a for inputting AC power, and a first signal terminal 51b and a second signal terminal 51b for inputting a dimming signal are arranged. The terminal 52b also has a first output terminal 51c and a second output terminal 52c that output DC power at the other end. Each power supply unit 51, power supply unit 52 includes: a converter (converter) 57, a converter 58, rectifies and smoothes the AC power input from the power supply terminal 51a, power supply terminal 52a, and utilizes the switching operation of the switching (switching) element It is converted into predetermined DC power and output from output terminal 51c, output terminal 52c; control. Furthermore, the control unit 59 of the first power supply unit 51 and the control unit 60 of the second power supply unit 52 can input a dimming signal from the signal terminal 51b and the signal terminal 52b, and individually control the brightness of the first light emitting element 25 and the second light emitting element 26. Lights on, lights off and dimming are controlled. Moreover, the first power supply part 51 and the second power supply part 52 are arranged in a straight line along the longitudinal direction of the appliance body 50, and one end part having the power supply terminal 51a and the power supply terminal 52a respectively faces each other, and has a The output terminal 51c and the output terminal 52c are housed and attached in the appliance body 50 in a state where the other ends face the end portion side of the appliance body 50 .

Furthermore, the power supply terminal block 53 is arranged at one end of the appliance body 50 , and the dimming terminal block 54 is arranged at the other end of the appliance body 50 . A power supply line for supplying AC power is electrically connected to the power terminal block 53 . A signal line from a dimming unit that outputs a dimming signal is electrically connected to the dimming terminal block 54 .

Furthermore, the power supply terminal 51a of the first power supply unit 51 and the power supply terminal 52a of the second power supply unit 52 are connected to the power supply terminal block 53 by the first power supply line 66a and the second power supply line 66b, respectively. The signal terminal 51b of the first power supply unit 51 and the signal terminal 52b of the second power supply unit 52 are connected to the dimming terminal block 54 by a first signal line 67a and a second signal line 67b, respectively.

The connecting wire 68 and the connecting wire 69 are respectively connected to a pair of output terminals 51c of the first power supply unit 51, and one connecting wire 68 is connected to an appliance connecting portion 70 on one end side, and the appliance connecting portion 70 is disposed on one end side of the appliance body 50, The other connecting wire 69 is connected to an appliance connection portion 71 on the other end side, and the appliance connection portion 71 is disposed on the other end side of the appliance body 50 . The connecting wire 72 and the connecting wire 73 are respectively connected to the pair of output terminals 52c of the second power supply unit 52, one connecting wire 72 is connected to the appliance connecting portion 71 on the other end side, and the other connecting wire 73 is connected to the appliance connecting portion on the one end side. 70.

The appliance connection portion 70 on one end side includes a plug housing having a three-terminal structure, and the appliance connection portion 71 on the other end side includes a plug housing having a four-terminal structure. Therefore, only the light source connecting portion 32 on one end side and the light source connecting portion 34 on the other end side can be mechanically and electrically connected to the appliance connecting portion 70 on one end side, and the light source connecting portion 32 on the other end side The appliance connecting portion 71 can be mechanically and electrically connected only to the light source connecting portion 34 on the other end side of the light source connecting portion 32 on one end side and the light source connecting portion 34 on the other end side. Moreover, the appliance connection portion 70 on one end side is connected to the light source connection portion 32 on the one end side, and the appliance connection portion 71 on the other end side is connected to the light source connection portion 34 on the other end side, whereby a pair of first power supply portions 51 The first output terminals 51c are electrically connected to the pair of first input terminals 30 of the light emitting module 16 , and the pair of second output terminals 52c of the second power supply unit 52 are electrically connected to the pair of second input terminals 31 of the light emitting module 16 .

Furthermore, in the illuminating device 10 configured in this way, the control unit 59 of the first power supply unit 51 and the control unit 60 of the second power supply unit 52 have a function of supplying electric power to the first light source 37 and the second light source 38 respectively so that they emit light, and make the illumination light formed by mixing the light emitted by the first light source 37 and the light emitted by the second light source 38 change color in a predetermined color reproduction region, and control it in such a way that the color reproduction region The upper limit side of the luminous flux has the peak value of the luminous flux on at least one of the high color temperature side and the low color temperature side, and the luminous flux value is continuous between the high color temperature side and the low color temperature side.

FIG. 1 shows the relationship between the reproducible color temperature and the relative light output (relative luminous flux) when the first light source 37 with a color temperature of 6000K and the second light source 38 with a color temperature of 2300K are used.

Assuming that when the first light source 37 and the second light source 38 are turned on at full power, the peak P1 at which the relative light output is maximized occurs in the middle of the reproducible color temperature range, and the color temperature at this time is about 3500K. From the state where the first light source 37 and the second light source 38 are turned on at full power, for example, dimming the second light source 38 to change the color is performed, and the relative light output is greatly reduced from the peak value P1 to The color temperature at which the second light source 38 is turned off and only the first light source 37 is turned on is 6000K. Similarly, if the dimming is performed by dimming the first light source 37 , the relative light output greatly decreases from the peak value P1 to a color temperature of 2300K at which the first light source 37 is turned off and only the second light source 38 is turned on. Therefore, if the color of the illumination light is changed, the luminous flux will be greatly changed.

In the present embodiment, control is performed in such a manner that both the first light source 37 and the second light source 38 are turned on by the control unit 59 of the first power supply unit 51 and the control unit 60 of the second power supply unit 52. Next, the color of the illumination light obtained by mixing the light emitted by the first light source 37 and the light emitted by the second light source 38 is changed within a predetermined color reproduction area A. FIG.

The color temperature variable range of the color reproduction region A is 5000K to 2700K controlled so that both the first light source 37 and the second light source 38 can be reproduced.

The upper limit side U of the color reproduction area A is controlled to a dimming degree lower than the dimming degree at which both the first light source 37 and the second light source 38 are fully lit, and is lower than the dimming degree at which the first light source 37 and the second light source 38 are fully lit. The peak value P1 when the light is turned on. Furthermore, control is performed such that the upper limit side U of the color reproduction region A has a peak value P2 of the relative light output on the side with a high color temperature, and the relative light output (beam value) is changed from the peak value P2 on the side with a high color temperature to The peak P2 is continuous to the side where the color temperature is low. Regarding the peak value P2, when the electric power supplied to the first light source 37 and the second light source 38 is the same wattage at the color temperature of 5000K and 2700K, the luminous efficiency of the first light source 37 of daylight color is higher than that of the second light source of light bulb color. 2 Since the luminous efficiency of the light source 38 has a higher color temperature, the peak value P2 occurs. Furthermore, the difference between the upper limit side U of the color reproduction region A between the side with a high color temperature and the side with a low color temperature is controlled within a range of 20%.

The lower limit side D of the color reproduction area A is a lower limit value at which the first light source 37 and the second light source 38 can be dimmed.

Furthermore, the control unit 59 of the first power supply unit 51 and the control unit 60 of the second power supply unit 52 perform control so that, in the state where both the first light source 37 and the second light source 38 are turned on, the The color of the illumination light obtained by mixing the light emitted by the first light source 37 and the light emitted by the second light source 38 is changed in the color reproduction area A. Therefore, even if the color is changed, the relative light output does not change greatly, and the brightness can be maintained at a constant level. Discoloration in case.

That is, in practice, a light output higher than the color reproduction area A can be obtained, but by limiting the light output on the upper limit side U of the color reproduction area A, even if the color is changed, the relative light output does not change significantly, and the brightness can be maintained at a constant level. Discoloration in case.

In addition, since the peak P2 of the relative light output is controlled on the high color temperature side of the color reproduction area A, the light output can be supplied to the second light output on the high color temperature side and the low color temperature side of the color reproduction area A. The electric power of the first light source 37 and the second light source 38 are controlled to be the same wattage, so dimming control can be easily performed.

In addition, since the difference between the high color temperature side and the low color temperature side of the upper limit side U of the color reproduction area A is controlled within 20%, even if the color is changed, it is difficult to feel a change in brightness. If the difference between the high color temperature side and the low color temperature side of the upper limit side U of the color reproduction area A is greater than 20%, it is easy to feel a change in brightness if the color is changed.

In addition, as shown in FIG. 5 , the control unit 59 of the first power supply unit 51 and the control unit 60 of the second power supply unit 52 can also be used to control the peak value of the relative light output in the color reproduction region A to exist in a region with a low color temperature. side.

Moreover, as shown in FIG. 6, the control unit 59 of the first power supply unit 51 and the control unit 60 of the second power supply unit 52 can also be used to control the peak value of the relative light output in the color reproduction region A to exist in a region with a high color temperature. Said two places on the side and the side with low color temperature. At this time, the upper limit side U of the color reproduction area A becomes flat (plat), and even if the color is changed, the relative light output does not change, and the color can be changed while maintaining a constant brightness. Such control can be realized by making the power supplied to the first light source 37 and the second light source 38 different between the high color temperature side and the low color temperature side of the color reproduction area A.

As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range described in the said embodiment. Those skilled in the art should understand that various changes or improvements can be implemented to the embodiments. In addition, it is clear from the description of the claims that such modified or improved forms also belong to the technical scope of the present invention.

Claims (6)

1. a kind of lighting device, characterized by comprising:

1st light source issues the light of the 1st colour temperature；

2nd light source issues the light of 2nd colour temperature different from the 1st light source；And

Power supply unit, the 1st light source of Xiang Suoshu and the 2nd light source supply electric power and make the 1st light source and the 2nd light source two In the state of person's all lightings, so as to be shone made of the light colour mixture issued using the light that the 1st light source issues with the 2nd light source The colour temperature and light output of Mingguang City changeable colour in color reproduction region, wherein the color reproduction region is can to make the illumination light Colour temperature and the region that changes of light output, and proceed as follows control, that is,

Brightness adjustment control is carried out to the 1st light source and the 2nd light source, and

Control the upper limit side of the light output of the color reproduction region for than keeping the 1st light source and the 2nd light source complete The low degree of dimming of the degree of dimming of luminous point lamp, and there is the peak value of light output, also, the side high from colour temperature in the high side of colour temperature The side low to colour temperature, which makes light output continuously, to reduce,

The lower limit side of the light output of the color reproduction region, which becomes, can make the 1st light source and the 2nd light source in lighting The lower limit value of dim light under state.

2. lighting device according to claim 1, it is characterised in that:

The high side of colour temperature of the power supply unit in the color reproduction region side low with colour temperature, is fed to the described 1st The Electric control of light source and the 2nd light source is identical wattage.

3. lighting device according to claim 1, it is characterised in that:

The light of the light output of the high side of the colour temperature of the upper limit side of the light output of the color reproduction region side low with colour temperature The difference of output is within 20%.

4. lighting device according to claim 1, it is characterised in that:

The peak value of the light output of the upper limit side of the color reproduction region, which is lower than, keeps the 1st light source and the 2nd light source complete The peak value of the light output of luminous point lamp.

5. lighting device according to claim 1, it is characterised in that:

The peak value of the light output of the color reproduction region is located at the side two low with colour temperature of the high side of colour temperature.

6. lighting device according to claim 5, it is characterised in that:

The power supply unit makes the side low with colour temperature in the high side of the colour temperature of the color reproduction region be respectively fed to institute The electric power for stating the 1st light source and the 2nd light source is different.