JP6249166B2 - Lighting device - Google Patents

Description

  Embodiments described herein relate generally to an illumination device that variably colors illumination light.

  2. Description of the Related Art Conventionally, there is a luminaire that includes two types of light sources having different color temperatures and a power source unit that supplies power to each of the light sources, and the light source is dimmed by the power source unit so that the illumination light can be variably colored.

  In such a luminaire, the illumination light mixed by the light emitted from the two types of light sources can be variably colored within a predetermined color reproduction region, but the color reproduction region has a high color temperature side and a low color temperature side. A light flux peak occurs at an intermediate color temperature. That is, a luminous flux peak occurs at the color temperature when all the two types of light sources are turned on.

  If the color is changed to a side higher or lower than the color temperature of the peak of the luminous flux, the luminous flux is lowered to diminish one of the two types of light sources.

  When the illumination light is changed in color, the luminous flux changes greatly, so that there may be a sense of incongruity in the change in brightness. Further, when selecting a luminaire, the value of the luminous flux is referred to. However, if the illumination light is changed in color, the value of the luminous flux changes greatly, so that the selection of the luminaire becomes difficult.

JP 2012-3993 A

  When the illumination light is changed in color, 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 in which the change in luminous flux is small even when the color is changed.

The illumination device according to the embodiment includes a first light source that emits light of a first color temperature, a second light source that emits 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 so that both the first light source and the second light source are turned on, and the light emitted from the first light source and the second light source are The first light source and the second light source so that the color temperature and the luminous flux of the illumination light mixed with the emitted light can be varied within a color reproduction region that is a range in which the color temperature and the luminous flux of the illumination light can be changed. Dimming control. Power supply unit, the upper side of the light beam of the color reproduction area, none of the first and second light sources and low dimming degree than dimming all optical lighting, having a peak of luminous flux in the high color temperature side together with controls to so that a lower light flux continuously over the high color temperature side to the lower side, the lower side of the light beam of the color reproduction area, reducing the first and second light sources in a lighting state Control to the lower limit of luminous flux .

  According to the present invention, the luminous flux does not change greatly even if the color is changed, and it can be expected that the color can be changed without a sense of incongruity.

It is a graph which shows the relationship between the color temperature which the illuminating device which shows one Embodiment can reproduce, and relative light output. It is a wiring diagram of the light source unit of an illuminating device same as the above. It is a wiring diagram of the fixture unit of an illuminating device same as the above. It is a perspective view of an illuminating device same as the above.

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

  As shown in FIG. 4, the illumination device 10 includes a light source unit 11 and a fixture unit 12 to which the light source unit 11 is detachably attached. The appliance unit 12 is installed on the ceiling or the like, and the light source unit 11 is attached to the lower part of the appliance unit 12.

  The light source unit 11 includes a long support 15, a light emitting module 16 attached to the lower surface of the support 15, a translucent cover 17 that covers the light emitting module 16 and is attached to the support 15, and the light source unit 11. Are provided with a plurality of attachment portions 18 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 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 electrically connected to the first wiring pattern and the second wiring pattern, respectively. It is implemented in a state of being connected. 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 in the longitudinal direction, and adjacent substrates 24 are electrically connected by a connector or the like. Terminal portions 28 and 29 are provided at both ends of the light emitting module 16 in the longitudinal direction. The terminal portion 28 on one end side is provided with one of a pair of first input terminals 30 and one of a pair of second input terminals 31 respectively, and the terminal portion 29 on the other end side has a pair of first input terminals. The other of the 30 and the other of the pair of second input terminals 31 are respectively provided. The first light emitting element 25 is electrically connected between the pair of first input terminals 30, and the second light emitting element 26 is electrically connected between the pair of second input terminals 31.

  A light source connection part 32 on one end side is connected to the terminal part 28 on one end side by a connection line 33, and a light source connection part 34 on the other end side is connected to a terminal part 29 on the other end side by a connection line 35. The light source connection part 32 on one end side is constituted by a receptacle housing having a three-terminal structure, and the light source connection part 34 on the other end side is constituted by a receptacle housing having a four-terminal structure. And the light source connection parts 32 and 34 are pulled out to the outer side of the support body 15 by the connection lines 33 and 35, and the connection to the instrument unit 12 side is possible.

  The first light emitting element 25 and the second light emitting element 26 emit light having different color temperatures. In the present embodiment, the first light emitting element 25 emits light having a daylight white color temperature, and the second light emitting element 26 emits light having a light bulb color temperature. These light emitting elements 25 and 26 are constituted by, for example, an LED or an organic EL. The first light emitting element 25 is mounted on one side in the width direction of the substrate 24 at a predetermined interval along the longitudinal direction of the substrate 24, and the second light emitting element 26 is mounted on the other side in the width direction of the substrate 24. It is mounted at predetermined intervals along the longitudinal direction of 24.

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

  Next, as shown in FIGS. 3 and 4, the instrument unit 12 includes a longitudinal instrument body 50, and a first power supply unit 51 and a second power supply unit disposed as a power supply unit disposed in the instrument body 50. A power supply unit 52, a power supply terminal block 53, a dimming terminal block 54, and the like are provided.

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

  The first power supply unit 51 supplies power to the first light emitting element 25 that is the first light source 37, and the second power supply unit 52 supplies power to the second light emitting element 26 that is the second light source 38. To do. 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 dimming signal input A signal terminal 51b and a second signal terminal 52b are disposed, and a first output terminal 51c and a second output terminal 52c for outputting DC power are disposed at the other end. Each power supply unit 51, 52 rectifies and smoothes the AC power input from the power supply terminals 51a, 52a, converts it into predetermined DC power by the switching operation of the switching element, and outputs from the output terminals 51c, 52c, 57 58 and control units 59 and 60 for controlling on / off of switching elements of the converters 57 and 58. And the control part 59 of the 1st power supply part 51 and the control part 60 of the 2nd power supply part 52 input the light control signal from signal terminal 51b, 52b, and the 1st light emitting element 25 and the 2nd light emitting element 26 lights on / off and dimming can be controlled individually. The first power supply unit 51 and the second power supply unit 52 are arranged in a straight line along the longitudinal direction of the instrument main body 50, with one end portion having the power supply terminals 51a and 52a facing each other and an output terminal. The other end portion having 51c, 52c is accommodated in and attached to the instrument main body 50 with the other end facing the end side of the instrument main body 50.

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

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

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

  The instrument connecting portion 70 on one end side is constituted by a plug housing having a three-terminal structure, and the instrument connecting portion 71 on the other end side is constituted by a plug housing having a four-terminal structure. Accordingly, only the light source connection part 32 on one end side of the light source connection part 32 on one end side and the light source connection part 34 on the other end side can be mechanically and electrically connected to the instrument connection part 70 on one end side, Further, only the light source connection part 34 on the other end side of the light source connection part 32 on one end side and the light source connection part 34 on the other end side can be mechanically and electrically connected to the appliance connection part 71 on the other end side. It is said. Then, by connecting the appliance connecting portion 70 on one end side and the light source connecting portion 32 on one end side, the appliance connecting portion 71 on the other end side and the light source connecting portion 34 on the other end side are connected, so that the first The pair of first output terminals 51c of the power supply unit 51 and the pair of first input terminals 30 of the light emitting module 16 are electrically connected, and the pair of second output terminals 52c of the second power supply unit 52 A pair of second input terminals 31 of the light emitting module 16 are electrically connected.

  In the lighting device 10 configured as described above, the control unit 59 of the first power supply unit 51 and the control unit 60 of the second power supply unit 52 supply power to the first light source 37 and the second light source 38, respectively. And illuminating the light so that the illumination light mixed by the light emitted from the first light source 37 and the light emitted from the second light source 38 is variably colored within a predetermined color reproduction region, and the light flux in the color reproduction region The upper limit side has a peak of light flux on at least one of the high color temperature side and low color side, and has a function of controlling the light flux value to be continuous between the high color temperature side and the low color temperature side. ing.

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

  If the first light source 37 and the second light source 38 are all lit, a peak P1 where the relative light output is maximum occurs in the middle of the reproducible color temperature range, and the color temperature at this time is 3500K. It will be about. When the first light source 37 and the second light source 38 are all lit, and the dimming is performed so that the second light source 38 is dimmed in order to change the color, the relative light output starts from the peak P1. The second light source 38 is turned off, and the color temperature is greatly reduced to 6000 K at which only the first light source 37 is turned on. Similarly, when dimming so that the first light source 37 is dimmed, the relative light output greatly decreases from the peak P1 to the color temperature 2300K at which the first light source 37 is turned off and only the second light source 38 is turned on. Will do. Therefore, when the illumination light is changed in color, the luminous flux changes greatly.

  In the present embodiment, the first light source 37 and the second light source 38 are both 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. The illumination light mixed by the light emitted from the light source 37 and the light emitted from the second light source 38 is controlled so as to be variable in the predetermined color reproduction region A.

  The color temperature variable range of the color reproduction region A is controlled from 5000K to 2700K, which can be reproduced with both the first light source 37 and the second light source 38 turned on.

  The upper limit side U of the color reproduction area A is controlled to have a dimming degree lower than the dimming degree of all-light lighting, and both the first light source 37 and the second light source 38 are controlled. It becomes lower than the peak P1 when the light source 38 is turned on all light. The upper limit side U of the color reproduction region A has a relative light output peak P2 on the higher color temperature side and a relative light output (light flux) from the higher color temperature peak P2 to the lower color temperature side. Value) is controlled continuously. Regarding the peak P2, when the power supplied to the first light source 37 and the second light source 38 is the same wattage at the color temperatures of 5000K and 2700K, the luminous efficiency of the daylight-colored first light source 37 is the light bulb color first. Since the luminous efficiency of the second light source 38 is higher, the peak P2 occurs at the higher color temperature. Further, the difference between the high color temperature side and the low color temperature side of the upper limit side U of the color reproduction region A is controlled to be within 20%.

  The lower limit side D of the color reproduction region A is a lower limit value capable of dimming the first light source 37 and the second light source 38.

  Then, the first light source 37 is turned on in a state where 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. Since the illumination light mixed by the light emitted from the second light source 38 and the light emitted from the second light source 38 are controlled so as to be variably colored in the color reproduction region A, the relative light output does not change greatly even when the color is varied. The color can be changed while keeping the brightness constant.

  That is, although it is possible to obtain a light output higher than that of the color reproduction area A in practice, the relative light output can be obtained even if the color is changed by limiting the light output to the upper limit side U of the color reproduction area A. It is possible to change the color while keeping the brightness constant without changing greatly.

  Further, in order to perform control so as to have the peak P2 of the relative light output on the high color temperature side of the color reproduction area A, the first light source 37 and the second light source 37 on the high color temperature side and low side of the color reproduction area A. Since the power supplied to the light source 38 can be controlled with the same wattage, dimming control can be facilitated.

  Further, 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 a range of 20% or less, it is possible to make it difficult to perceive a change in brightness even if the color is changed. If the difference between the high and low color temperatures on the upper limit side U of the color reproduction area A is greater than 20%, a change in brightness is easily felt when the color is changed.

  Note that the peak of the relative light output in the color reproduction region A is controlled by the control unit 59 of the first power supply unit 51 and the control unit 60 of the second power supply unit 52 so as to exist on the low color temperature side. Also good.

  Further, the peak of the relative light output in the color reproduction area A is present on both the high side and the low side of the color temperature by the control unit 59 of the first power supply unit 51 and the control unit 60 of the second power supply unit 52. You may control to do. In this case, the upper limit side U of the color reproduction region A is flat, and even if the color is changed, the relative light output does not change, and the color can be changed with the brightness kept constant. Such control is made possible by making the power supplied to the first light source 37 and the second light source 38 different between the higher and lower color temperatures of the color reproduction region A.

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

10 Lighting equipment
37 First light source
38 Second light source
51 First power supply as power supply
52 Second power supply as a power supply A Color reproduction area

Claims (2)

A first light source that emits light of a first color temperature;
A second light source that emits light of a second color temperature different from the first light source;
The light emitted from the first light source and the second light source in a state where both the first light source and the second light source are turned on by supplying electric power to the first light source and the second light source. The first light source and the first light source so that the color temperature and the luminous flux of the illumination light mixed by the light emitted from the light vary within a color reproduction region that is a range in which the color temperature and the luminous flux of the illumination light can be changed . And the upper limit side of the luminous flux in the color reproduction region is set to a dimming degree lower than the dimming degree of all-light lighting, with a peak of the light beam to the high temperature side, and controls the so that a lower light flux continuously over the high color temperature side to the lower side, the lower limit of the light beam of the color reproduction region, the first Under the luminous flux that can be dimmed while the second light source is turned on. A power supply unit for controlling the value;
Lighting apparatus characterized by comprising a. Upper side of the light flux of the color reproduction region, claim 1 Symbol mounting lighting apparatus wherein the difference between the luminous flux of the light beam and the low side of high color temperature side is within 20%.

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