WO2014076948A1 - 照明装置および発光装置 - Google Patents
照明装置および発光装置 Download PDFInfo
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- WO2014076948A1 WO2014076948A1 PCT/JP2013/006679 JP2013006679W WO2014076948A1 WO 2014076948 A1 WO2014076948 A1 WO 2014076948A1 JP 2013006679 W JP2013006679 W JP 2013006679W WO 2014076948 A1 WO2014076948 A1 WO 2014076948A1
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- light emitting
- light
- white light
- wavelength conversion
- emitting unit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
- F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
- H05B45/24—Controlling the colour of the light using electrical feedback from LEDs or from LED modules
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2113/00—Combination of light sources
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
- H05B45/18—Controlling the intensity of the light using temperature feedback
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/32—Pulse-control circuits
- H05B45/325—Pulse-width modulation [PWM]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/355—Power factor correction [PFC]; Reactive power compensation
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/375—Switched mode power supply [SMPS] using buck topology
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/38—Switched mode power supply [SMPS] using boost topology
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/395—Linear regulators
Definitions
- the present invention relates to a lighting device and a light emitting device, and more particularly to a lighting technique in a store or the like.
- an illumination object in an illumination space be seen in a color close to a natural color. For this reason, high color rendering properties (fidelity of color appearance) are required for the emitted white light.
- a lighting device used in a store or the like does not necessarily require high color rendering properties for emitted white light.
- store lighting may be performed using an illuminating device that emits white light with low color rendering but high saturation in order to show the color of the groceries vividly.
- the lighting devices installed on each floor have a color rendering property and saturation suitable for the products that have the same color temperature and are handled on each floor. It was supported by changing to a lighting device that outputs light, and it was a big one.
- the present invention has been made in view of the above reasons, and an object thereof is to provide a lighting device suitable for various lighting in a store or the like.
- the illumination device includes a first light emitting unit that emits first white light, a second light emitting unit that emits second white light, a light amount of the first light emitting unit, and a light amount of the second light emitting unit.
- the first white light and the second white light have the same color temperature, and the first white light is compared to the second white light. High saturation and low color rendering.
- the ratio of the amount of the first white light emitted from the first light emitting unit and the amount of the second white light emitted from the second light emitting unit can be freely set by the light amount ratio control unit.
- FIG. 1 is an exploded perspective view of a lighting device according to Embodiment 1.
- FIG. (A) is a disassembled perspective view of the illumination light source according to Embodiment 1
- (b) is a plan view of the main part of the illumination light source according to Embodiment 1
- (c) is a point in (b). It is a top view of the part enclosed with chain line A1.
- 1 is a circuit diagram of a lighting device according to Embodiment 1.
- FIG. It is a figure which shows an example of the ellipse of MacAdam in a CIExy chromaticity diagram.
- (A) is a figure corresponding to 1st Example which shows the color matching temperature recognition area
- (b) is Embodiment 1.
- FIG. It is a figure corresponding to 2nd Example which shows the color matching temperature recognition area
- (A) is a figure which shows the spectral spectrum of the 1st white light in the illuminating device which concerns on 1st Example of Embodiment 1
- (b) is in the illuminating device which concerns on 1st Example of Embodiment 1.
- FIG. It is a figure which shows the spectrum of 2nd white light.
- (A) is the table
- (b) is in 1st Example of Embodiment 1.
- FIG. It is the table
- 4 is a table listing various indexes for evaluating the optical characteristics of white light emitted from the illumination device according to the first example of the first embodiment.
- FIG. 6B is a graph showing the relationship between the conspicuous index and the light quantity ratio of the light emitting unit in the white light emitted from the illumination apparatus according to the first example of the first embodiment.
- (A) is a figure which shows the spectrum of the 1st white light in the illuminating device which concerns on 2nd Example of Embodiment 1,
- (b) is in the illuminating device which concerns on 2nd Example of Embodiment 1.
- FIG. It is the table
- FIG. 4 is a table listing various indexes for evaluating the optical characteristics of white light emitted from the illumination device according to the second example of the first embodiment.
- (A) is the figure which graphed the relationship between the average color-rendering evaluation number Ra and color gamut area ratio Ga in the white light radiate
- FIG. 8B is a graph showing the relationship between the conspicuous index and the light quantity ratio of the light emitting part in the white light emitted from the illumination apparatus according to the second example of the first embodiment.
- FIG. (A) is a top view of the light-emitting device which concerns on Embodiment 2
- (b) is an enlarged view of A2 part of (a).
- 6 is a perspective view of a lamp unit according to Embodiment 3.
- FIG. 6 is an exploded perspective view of a lamp unit according to Embodiment 3.
- FIG. It is sectional drawing of the illuminating device which concerns on Embodiment 4.
- FIG. (A) is a top view of the light-emitting device which concerns on a modification
- (b) is a top view of the light-emitting device which concerns on a modification.
- (A) is a top view of the light-emitting device which concerns on a modification
- (b) is a top view of the light-emitting device which concerns on a modification
- (c) is a top view of the light-emitting device which concerns on a modification.
- (A) is a top view of the light-emitting device which concerns on a modification
- (b) is a top view of the light-emitting device which concerns on a modification. It is a top view of the light-emitting device concerning a modification.
- FIG. 1 shows an exploded perspective view of lighting apparatus 1 according to the present embodiment.
- the illuminating device 1 includes a lamp 21 including a first light emitting unit that emits first white light and a second light emitting unit that emits second white light, and the light amount and second light emission of the first light emitting unit of the lamp 21. At least a light amount ratio control unit that controls a light amount ratio of the unit.
- the lighting device 1 includes a housing 11, an electronic ballast 14 and a terminal block 13 attached to the housing 11, a cover plate 15, and a shade 51 in addition to the lamp 21 and the light quantity ratio control unit. Prepare.
- the lighting device 1 is used as a base light installed on a ceiling surface, for example.
- the lamp 21 corresponds to the light emitting device of the present invention and is used as a light source for illumination. Further, the light quantity ratio control unit is included in the electronic ballast 14 as a light quantity ratio control circuit 14e.
- the housing 11 is formed in a long box shape, for example, and has an opening 11a formed by opening the illumination object side.
- the housing 11 includes an elongated rectangular plate-shaped top plate 11b and a peripheral wall 11c continuous to the four sides of the top plate 11b.
- the housing 11 is made of a metal material such as aluminum.
- the inner surface 11d of the peripheral wall 11c constitutes a reflection surface that reflects the light emitted from the lamp 21.
- a pair of power supply side sockets 16b is attached to the bottom surface of the top plate 11b in the longitudinal direction via a power supply side socket base 16a.
- a pair of ground side sockets 17b are attached via the ground side socket base 17a.
- a pair of sockets 16b and 17b are provided in accordance with the terminals of the caps 34 and 35 of the lamp 21.
- FIG. 2 (a) shows an exploded perspective view of the lamp 21, FIG. 2 (b) shows a plan view of the main part, and FIG. 2 (b) shows an enlarged view of the portion surrounded by the alternate long and short dash line A1 in FIG. c).
- the lamp 21 includes a first light emitting module 31A including a first light emitting unit 312A and a second light emitting module 31B including a second light emitting unit 312B.
- first light emitting module 31A including a first light emitting unit 312A
- second light emitting module 31B including a second light emitting unit 312B.
- the lamp 21 has, for example, a long shape.
- the lamp 21 has a base 34 attached to one end in the longitudinal direction fixed to the power supply side socket 16b, and a base 35 attached to the other end fixed to the ground side socket 17b. Installed on.
- the lamp 21 is generated by two long light emitting modules 31A and 31B and light emitting modules 31A and 31B.
- a long heat transfer plate 32 that dissipates the heat and a cover 33 that covers the side of the heat transfer plate 32 to which the light emitting modules 31A and 31B are attached.
- the heat transfer plate 32, the cover 33, and the caps 34, 35 constitute a long envelope that houses the light emitting modules 31A, 31B.
- the heat transfer plate 32 is made of a metal having a high thermal conductivity such as a metal such as aluminum or a ceramic or a heat conductive resin.
- the cover 33 is made of, for example, a resin material such as a translucent acrylic resin, glass, or the like.
- base pins 34a for fixing the lamp 21 to the power supply side socket 16b and supplying power to the light emitting modules 31A and 31B protrude.
- a fixing pin 35a for fixing the lamp 21 to the ground side socket 17b protrudes from the base 35.
- the light emitting modules 31A and 31B have light emitting sections 312A and 312B, respectively.
- emitted from the illuminating device 1 is the 1st white light radiate
- the second white light emitted from the second light emitting unit 312B of 31B is mixed.
- emitted from the illuminating device 1 became 2nd white light
- the light quantity of the 2nd light emission part 312B was controlled to 0%.
- the light emitted from the lighting device 1 is the first white light.
- the first white light and the second white light have a color temperature within the same range, but have different color rendering properties and saturation. Details of the light emitting modules 31A and 31B will be described later.
- the terminal block 13 and the electronic ballast 14 are attached to a substantially central portion in the longitudinal direction of the top plate 11b.
- the electronic ballast 14 converts electric power supplied from an external power source (not shown) via the power line L1 and the terminal block 13 and supplies it to the lamp 21 via the power supply side socket base 16a and the power supply side socket 16b.
- the electronic ballast 14 is operated when the user changes the ratio between the light amount of the first light emitting unit 312A of the first light emitting module 31A and the light amount of the second light emitting unit 312B of the second light emitting module 31B.
- a controller 61 is connected via a signal line 62. Details of the circuit configuration of the illumination device 1 including the electronic ballast 14 will be described later.
- the cover plate 15 is formed by bending a plate material into a substantially C-shaped cross section.
- the cover plate 15 is attached to the top plate 11b by screws or the like so as to cover (cover) the terminal block 13 and the electronic ballast 14 from the lower surface side of the top plate 11b.
- the cover plate 15 is made of a metal material such as aluminum.
- the shade 51 includes a rectangular frame-shaped frame body 51a and a window member 51b that is formed in a rectangular plate shape from a translucent material and is fitted inside the frame body 51a.
- the frame 51a is formed from a metal material such as aluminum.
- the window member 51b has a light scattering function for scattering light.
- a particle portion formed of a translucent material such as titania, silica, alumina, or zinc oxide on a base portion formed of a translucent material such as a resin material such as polycarbonate or glass or ceramic. are distributed.
- FIG. 3 shows a circuit diagram of the lighting apparatus according to the present embodiment.
- the light emitting units 312A and 312B included in each of the light emitting modules 31A and 31B have a plurality of LEDs.
- the plurality of LEDs of each of the light emitting units 312A and 312B are connected, for example, in a predetermined connection state, here, in series and parallel.
- the electronic ballast 14 includes a power supply circuit 14f and a light amount ratio control circuit 14e.
- the power supply circuit 14f supplies current to each of the first light emitting unit 312A and the second light emitting unit 312B.
- the power supply circuit 14f includes a rectifier circuit 14a, a PFC (Power Factor Correction) circuit 14b, and two constant current circuits 14c and 14d.
- the rectifier circuit 14a rectifies the alternating current supplied from the external power supply AC through the power supply line L1 and converts it into direct current.
- the rectifier circuit 14a may be constituted by a diode bridge, for example.
- the PFC circuit 14b is a circuit for improving the input power factor.
- the PFC circuit 14b may be constituted by, for example, a known boost chopper circuit.
- the constant current circuits 14c and 14d receive a power supply from the PFC circuit 14b and supply a constant current to each of the first light emitting unit 312A of the first light emitting module 31A and the second light emitting unit 312B of the second light emitting module 31B.
- the constant current circuits 14c and 14d are configured using a known step-down chopper circuit, a step-up / step-down circuit, and the like, and constant current control is performed.
- the light amount ratio control circuit 14e based on the signal voltage input from the controller 61 via the signal line 62, the magnitude of the current supplied from the power supply circuit 14f to the first light emitting unit 312A, and the second power supply from the power supply circuit 14f.
- the ratio of the magnitude of the current supplied to the light emitting unit 312B is changed.
- the ratio between the light amount of the first light emitting unit 312A and the light amount of the second light emitting unit 312B changes.
- the light quantity ratio control circuit 14e individually changes the on-duty of the PWM signal input to each of the constant current circuits 14c and 14d, thereby changing the first light emitting unit 312A and the first light emitting unit 312A from the constant current circuits 14c and 14d.
- the magnitude of the current supplied to the two light emitting units 312B is changed.
- the first light emitting module 31A includes a substrate 310 and wiring 340 in addition to the first light emitting unit 312A.
- 1st light emission part 312A is comprised from several LED320 and 330 A of 1st wavelength conversion members.
- 2nd light emitting module 31B is provided with the board
- the 2nd light emission part 312B is comprised from several LED320 and the 2nd wavelength conversion member 330B (illustration omitted).
- the first wavelength conversion member 330A and the second wavelength conversion member 330B are simply described as “wavelength conversion members 330A and 330B” when it is not necessary to distinguish between them.
- the substrate 310 is formed in a long rectangular plate shape.
- the substrate 310 is shared by the first light emitting module 31A and the second light emitting module B.
- the substrate 310 is composed of a plate material made of metal such as aluminum and an insulating film made of white polycarbonate resin or the like and formed on the entire surface of the plate material.
- Power receiving terminals 314 and 316 that are electrically connected to the wiring 340 are provided at both ends of the substrate 310.
- a pair of lead wires 318 that are electrically connected to the base pins 34 a of the base 34 are led out from the power receiving terminal 314.
- Each LED 320 is, for example, a GaN-based LED that emits blue light.
- the LEDs 320 are arranged, for example, in a row on the substrate 310.
- each LED 320 is mounted on the substrate 310 with the surface on which the electrode (not shown) is provided on the side opposite to the side in contact with the substrate 310 (in a so-called face-up state).
- the LED 320 is electrically connected to a part of the wiring 340 located on both sides in the column direction of the LED 320 via the wire 395.
- the wire 395 is made of, for example, gold, and is bonded to a part of the wiring 340 and the electrode of the LED 320 by a known wire bonding method.
- the wiring pattern 340 is formed on the substrate 310 along the longitudinal direction of the substrate 310.
- the wiring pattern 340 is made of a metal material such as Ag or Cu.
- the wavelength conversion members 330A and 330B are arranged along the longitudinal direction of the substrate 310 so as to cover the LEDs 320 and a part of the wiring 340.
- the first white light is obtained by mixing with the light.
- the second light emitting unit 312B out of the blue light emitted from each LED 320, the light emitted after wavelength conversion by the wavelength conversion member 330B and the light emitted without being converted by the wavelength conversion member 330B. And the second white light is obtained.
- the first white light emitted from the first light emitting unit 312A and the second white light emitted from the second light emitting unit 312B have the same color temperature, but the color rendering properties and The saturation is different from each other, and the first white light has higher saturation and lower color rendering than the second white light.
- first light emitting unit 312A and the second light emitting unit 312B have different combinations of phosphors constituting part of the wavelength conversion members 330A and 330B.
- color temperature is in the same range
- CIE Commission International de I'Eclairage
- both the chromaticity of the first white light and the chromaticity of the second white light are the same.
- the “equal color temperature recognition region” corresponds to a temperature region in which human vision can be recognized as having the same color temperature.
- the peripheral shape of the uniform color temperature recognition region (the shape of the boundary line defining the inside and outside of the region) is the length of each of the major axis and the minor axis of the MacAdam ellipse corresponding to the central chromaticity of the uniform color temperature recognition region. It is an elliptical shape that is three times the height. This elliptical color matching temperature recognition region is also called a 3step region.
- the MacAdam ellipse will be described.
- FIG. 4 shows an example of the MacAdam ellipse in the xy chromaticity diagram.
- the “MacAdam ellipse” is an ellipse obtained by a color-matching experiment using additive color mixing in which MacAdam has an arbitrary chromaticity on the xy chromaticity diagram as a central chromaticity (see Japanese Patent Application Laid-Open No. 2010-80145).
- FIG. 4 only the MacAdam ellipse corresponding to the central chromaticity of 25 points is shown. This MacAdam ellipse can also be calculated for any other central chromaticity. As shown in FIG.
- the size of the MacAdam ellipse varies depending on the central chromaticity, and tends to increase as the xy coordinate of the central chromaticity increases. That is, the greater the xy coordinate of the central chromaticity of white light, the more difficult it is for human vision to recognize the difference in color temperature.
- the boundary in which the human vision in the xy chromaticity diagram recognizes the difference in color temperature is an ellipse obtained by doubling the major axis and the minor axis of the MacAdam ellipse. Therefore, in the present embodiment, the color matching temperature recognition region is in the region inside the ellipse obtained by multiplying the lengths of the major axis and minor axis of the MacAdam ellipse by three.
- the wavelength conversion members 330A and 330B are each formed by dispersing a phosphor or the like on a translucent substrate.
- the type of phosphor or the like is selected according to the color temperature, color rendering properties, and saturation required for the white light emitted from the light emitting units 312A and 312B.
- the first white light and the second white light are in the vicinity of 2700K (hereinafter referred to as “first example”) and in the vicinity of 5000K.
- first example 2700K
- second example A specific example (hereinafter referred to as “second example”) will be described.
- FIG. 5 shows a color matching temperature recognition region corresponding to the first white light and the second white light
- (a) is a diagram corresponding to the first embodiment
- (b) is a diagram corresponding to the second embodiment. It is a corresponding figure.
- the color matching temperature recognition region corresponding to the first embodiment has a slightly larger area than the color matching temperature recognition region corresponding to the second embodiment. That is, the first embodiment is less likely to feel the actual color temperature change than the second embodiment.
- the first white light and the second white light are set to be in the vicinity of 2700K.
- the wavelength conversion member 330A is formed by dispersing a yellow phosphor, a red phosphor, and neodymium oxide, which is a neodymium compound, on a translucent substrate.
- the wavelength conversion member 330B is formed by dispersing a green phosphor and a red phosphor on a translucent substrate.
- the translucent substrate is formed of a translucent resin material, translucent glass, or ceramic.
- the light-transmitting resin material silicone resin, fluororesin, silicone / epoxy hybrid resin, urea resin, or the like is used.
- yellow phosphor As the yellow phosphor, (Y, Gd) 3 Al 5 O 12 : Ce 3+ is adopted.
- Other examples of the yellow phosphor include (Sr, Ba) 2 SiO 4 : Eu 2+ , (Ca, Sr, Ba) AlSiN 3 : Eu 2+ , Ba 3 Si 6 O 12 N 2 : Eu 2+.
- Y 3 Al 5 O 12 Ce 3+ , Pr 3+ , (Tb, Gd) 3 Al 5 O 12 : Ce 3+ , (Sr, Ca) 2 SiO 4 : Eu 2+ , CaSi 2 O 2 N 2 : Eu 2+ , Ca- ⁇ -SiAlON: Eu 2+ , Y 2 Si 4 N 6 C: Ce 3+ , CaGa 2 S 4 : Eu 2+ may be employed.
- Tbx (Y, other rare earth elements except Tb) n (1-x) (Mo, W) 2 O 8 (0.4 ⁇ x ⁇ 1) is used as the green phosphor is doing.
- Other green phosphors include Y 3 Al 5 O 12 : Ce 3+ , Tb 3 Al 5 O 12 : Ce 3+ , BaY 2 SiAl 4 O 12 : Ce 3+ , and Ca 3 Sc 2 Si 3 O.
- Ca- ⁇ -SiAlON Eu 2+ is used as the red phosphor.
- the red phosphor other than that, CaAlSiN 3 : Eu 2+ , (Sr, Ca) AlSiN 3 : Eu 2+ , Sr 2 Si 5 N 8 : Eu 2+ , Sr 2 (Si, Al) 5 (N , O) 8 : Eu 2+ , CaS: Eu 2+ , and La 2 O 2 S: Eu 3+ .
- FIG. 6A is a diagram illustrating a spectral spectrum of the first white light
- FIG. 6B is a spectral spectrum of the second white light.
- the spectral spectra of the first and second white light are different from each other.
- the first white light has a reduced spectral intensity in the wavelength region of 550 nm to 620 nm compared to the second white light. This is because only the wavelength conversion member 330A contains neodymium oxide.
- FIG. 7A is a table listing various indexes for evaluating the optical characteristics of the first white light
- FIG. 7B is a table illustrating various indices for evaluating the optical characteristics of the second white light. It is the table
- the various indices include the color temperature Tc of the first and second white light, the color coordinates (x, y, u, v), the color rendering index R1 to R8, the special color rendering index R9 to R15, and the average color rendering index Ra.
- the color gamut area ratio Ga, Ga4 and the conspicuous index FCI were employed.
- the color rendering index R1 to R8 and the average color rendering index Ra are calculated based on the test colors (test colors of medium saturation) of test color numbers 1 to 8 defined in JIS Z8726.
- the color rendering evaluation numbers R1 to R8 are selected when evaluating the fidelity of the color appearance of a so-called medium-saturation illumination object.
- the special color rendering index R9 to R12 is calculated based on the test colors of test colors Nos. 9 to 12 (highly saturated test colors specified in JIS Z8726, specifically, bright red, yellow, green, and blue). Is.
- the special color rendering index numbers R9 to R12 are selected when evaluating the fidelity of the color appearance of a colorful illumination object.
- the special color rendering index R13, R14, R15 is based on the test colors (Western skin color, leaf color, Japanese skin color) of test color numbers 13 to 15 defined in JIS Z8726. It is calculated.
- the special color rendering index numbers R13, R14, and R15 are selected when evaluating the appearance of general Western skin color, leaf color, and Japanese skin color.
- the color gamut area ratio Ga is described in the reference column of JIS Z8726 as “a color rendering property evaluation method other than based on the color rendering index”. Specifically, the chromaticity coordinates based on the reference light and the chromaticity coordinates based on the sample light source are obtained for the eight test colors of test color numbers 1 to 8, and these are obtained by plotting them on the U * V * plane. Obtain the octagonal area. A value obtained by multiplying the ratio of the octagonal area corresponding to the sample light source and the octagonal area corresponding to the reference light by 100 is the color gamut area ratio Ga. When the color gamut area ratio Ga is small, the saturation tends to decrease and the color tends to appear dull. On the other hand, as the color area ratio Ga approaches 100, the saturation increases and the color tends to look vivid.
- the conspicuous index FCI is an index for evaluating the color conspicuous feeling of the illumination object (see Japanese Patent Laid-Open No. 6-180248).
- the conspicuous index FCI is calculated based on a four-color color sample composed of four colors approximated to the test colors of test color numbers 9 to 12 used when calculating the above-mentioned special color rendering index.
- the relational expression expressed by the expression (1) is established between the color gamut area of the four-color color arrangement sample and the conspicuous index FCI.
- G (S, 1000 (lx)) represents the color gamut area of the four-color color sample when the four-color color sample is illuminated with an illuminance of 1000 (lx) by the light source that is the object of evaluation of the conspicuous index FCI.
- G (D65, 1000 (lx)) indicates the color gamut area of the four-color color sample when the four-color color sample is illuminated with the illuminance of 1000 (lx) by the reference light source.
- a light source having a higher conspicuous index FCI can make the color of an illumination object such as a fresh flower or a green leaf become more conspicuous.
- the color gamut area ratio Ga4 is a color gamut area ratio calculated using the special color rendering evaluation numbers R9 to R12 corresponding to the test color numbers 9 to 12. Specifically, it is obtained by the same calculation method as the calculation method used for calculating the color area ratio Ga described above, using the special color rendering evaluation numbers R9 to R12. By using this color gamut area ratio Ga4 as an index, it is possible to accurately evaluate whether or not the illumination object that the user wants to show vividly appears.
- the color rendering index R1 to R8, the special color rendering index R9 to R15, and the average color rendering index Ra are indices for evaluating the color rendering properties of light, and the color gamut area ratio Ga, Ga4 and the conspicuous index FCI are It can be said that it is an index for evaluating saturation.
- “The first white light has lower color rendering than the second white light” means that the first white light color rendering index R1 to R8, the special color rendering index R9 to R15, and the average color rendering index. It means that Ra is low across the board compared to those of the second white light.
- the first white light has higher saturation than the second white light
- the color gamut area ratio Ga, Ga4 and the conspicuous index FCI of the first white light are those of the second white light. It means that it is expensive all over. Based on this, the optical characteristics of the first and second white light will be described.
- the color temperature of the first white light is 2691K
- the color temperature of the second white light is 2690K
- the first white light has smaller R1 to R15 and Ra (1 to 8), but larger Ga, FCI, and Ga4 than the second white light.
- the wavelength conversion member 330A has a configuration using a yellow phosphor
- the light emitted from the wavelength conversion member 330A is light having a high spectral intensity of 550 nm to 620 nm.
- FIG. 8 shows a spectral spectrum of white light emitted from the illumination device 1 according to the present embodiment.
- the light amount of the first light emitting unit 312A (the amount of light of the first white light) and the light amount of the second light emitting unit 312B (the second light amount) It is a figure which shows the result measured while changing the ratio with the light quantity of white light.
- “%” displayed in the upper right of FIG. 8 indicates the ratio of the second white light in the total light amount output from the lighting device 1. For example, if the ratio of the second white light is “0%”, only the first light emitting unit 312A is lit. If it is “100%”, only the second light emitting unit 312B is lit. Will be. If it is “50%”, the light amounts of the light emitting units 312A and 312B (the light amounts of the first and second white lights) are equal to each other.
- the controller 61 when the user operates the controller 61 to change the magnitude of the current supplied from the constant current circuits 14c and 14d to the light emitting units 312A and 312B, the light amount of the first light emitting unit 312A and the second light emitting unit 312B are changed.
- the ratio with the amount of light can be changed.
- the lighting device 1 is configured in accordance with the ratio of the light amount of the first light emitting unit 312A (first white light amount) and the light amount of the second light emitting unit 312B (second white light amount).
- the shape of the spectral spectrum of white light emitted from the light continuously changes.
- FIG. 9 is a table listing various indexes for evaluating the optical characteristics of white light emitted from the illumination device 1 according to the present embodiment.
- FIG. 10 shows the relationship between the average color rendering index Ra and the color gamut area ratio Ga and the light quantity ratio of the light emitting units 312A and 312B for white light emitted from the illumination device 1 according to the present embodiment.
- FIG. 4B is a graph showing the relationship between the conspicuous index FCI and the light quantity ratio of the light emitting units 312A and 312B.
- each of the chromaticity coordinates x and y of the white light emitted from the illumination device 1 is the ratio of the second white light (the ratio of the light amounts of the light emitting units 312A and 312B) in the CIExy chromaticity diagram. ),
- the values are close to each other and exist within a single MacAdam ellipse (see FIG. 5A). That is, the white light emitted from the illumination device 1 has a substantially constant color temperature Tc regardless of the ratio of the second white light, and exists in the same color matching temperature recognition region.
- the color rendering index R1 to R8, the special color rendering index R9 to R15, and the average color rendering index Ra, which are indicators of the color rendering property of white light emitted from the lighting device 1, are the ratio of the second white light (first light emission). As the light quantity of the module 31B increases, it gradually increases.
- the color gamut area ratios Ga and Ga4 and the conspicuous index FCI which are indicators of the saturation of the white light emitted from the lighting device 1, increase the ratio of the second white light (the amount of light of the second light emitting module 31B). That is, as the ratio of the first white light (the light amount of the first light emitting module 31A) decreases, it gradually decreases.
- the first white light and the second white light are set to be in the vicinity of 5000K.
- the wavelength converting member 330A is formed by dispersing neodymium oxide, which is a green phosphor, a red phosphor, and a neodymium compound, on a translucent substrate.
- neodymium oxide which is a green phosphor, a red phosphor, and a neodymium compound
- a green phosphor and a red phosphor are dispersed in a translucent substrate.
- the translucent substrate is formed of a translucent resin material, translucent glass, or ceramic.
- the light-transmitting resin material silicone resin, fluororesin, silicone / epoxy hybrid resin, urea resin, or the like is used.
- Tbx (Y, other rare earth elements except Tb) n (1-x) (Mo, W) 2 O 8 (0.4 ⁇ x ⁇ 1) is used as the green phosphor is doing.
- Other green phosphors include Y 3 Al 5 O 12 : Ce 3+ , Tb 3 Al 5 O 12 : Ce 3+ , BaY 2 SiAl 4 O 12 : Ce 3+ , and Ca 3 Sc 2 Si 3 O.
- the half-value width of the green emission peak can be reduced. It can. More specifically, in the case of Ba 3 Si 6 O 12 N 2 : Eu 2 or ⁇ -SiAlON: Eu 2+ , the half-value width of the emission peak can be reduced to about 55 nm to 70 nm. Thereby, the wavelength range absorbed by neodymium oxide is reduced, and the decrease in the saturation of white light can be suppressed.
- Ca- ⁇ -SiAlON Eu 2+ is used as the red phosphor.
- the red phosphor other than that, CaAlSiN 3 : Eu 2+ , (Sr, Ca) AlSiN 3 : Eu 2+ , Sr 2 Si 5 N 8 : Eu 2+ , Sr 2 (Si, Al) 5 (N , O) 8 : Eu 2+ , CaS: Eu 2+ , and La 2 O 2 S: Eu 3+ .
- FIG. 11A is a diagram illustrating a spectral spectrum of the first white light
- FIG. 11B is a spectral spectrum of the second white light.
- the spectral spectra of the first and second white light are different from each other.
- the first white light has a lower spectral intensity in the wavelength region of 550 nm to 620 nm than the second white light. This is because only the wavelength conversion member 330A contains neodymium oxide.
- FIG. 12A is a table listing various indexes for evaluating the optical characteristics of the first white light
- FIG. 12B is a table illustrating various indices for evaluating the optical characteristics of the second white light. It is the table
- the various indicators are the same as those used in FIGS. 7A and 7B and the table of FIG.
- the color temperature of the first white light is 4993K
- the color temperature of the second white light is 4961K
- the first white light has smaller R1 to R15 and Ra (1 to 8), but larger Ga, FCI, and Ga4 than the second white light.
- FIG. 13 shows a spectral spectrum of white light emitted from the illumination device 1 according to the present embodiment.
- the light amount of the first light emitting unit 312A (the amount of light of the first white light) and the light amount of the second light emitting unit 312B (the second light amount) It is a figure which shows the result measured while changing the ratio with the light quantity of white light.
- “%” displayed in the upper right of FIG. 13 indicates the ratio of the second white light in the total light amount output from the lighting device 1. For example, if the ratio of the second white light is “0%”, only the first light emitting unit 312A is lit. If it is “100%”, only the second light emitting unit 312B is lit. Will be. If it is “50%”, the light amounts of the light emitting units 312A and 312B (the light amounts of the first and second white lights) are equal to each other.
- the lighting device 1 according to the ratio between the light amount of the first light emitting unit 312A (first white light amount) and the light amount of the second light emitting unit 312B (second white light amount).
- the shape of the spectral spectrum of white light emitted from the light continuously changes.
- FIG. 14 is a table listing various indexes for evaluating the optical characteristics of white light emitted from the illumination device 1 according to the present embodiment.
- FIG. 15 shows the relationship between the average color rendering index Ra and the color gamut area ratio Ga and the light quantity ratio of the light emitting units 312A and 312B for white light emitted from the lighting apparatus 1 according to the present embodiment.
- FIG. 4B is a graph showing the relationship between the conspicuous index FCI and the light quantity ratio of the light emitting units 312A and 312B.
- each of the chromaticity coordinates x and y of the white light emitted from the illumination device 1 has a ratio of the second white light (the amount of light of the first light emitting unit 312B) in the CIExy chromaticity diagram. Regardless, it shows a close value and exists within a single MacAdam ellipse (see FIG. 5 (b)). That is, the white light emitted from the illumination device 1 has a substantially constant color temperature Tc regardless of the ratio of the second white light, and exists in the same color matching temperature recognition region.
- the color rendering index R1 to R8, the special color rendering index R9 to R15, and the average color rendering index Ra, which are indexes of the color rendering properties of white light emitted from the illumination device 1, are the ratio of the second white light (second light emission). As the light quantity of the module 31B increases, it gradually increases.
- the color gamut area ratios Ga and Ga4 and the conspicuous index FCI which are indicators of the saturation of the white light emitted from the lighting device 1, increase the ratio of the second white light (the amount of light of the second light emitting module 31B). That is, as the ratio of the first white light (the light amount of the first light emitting module 31A) decreases, it gradually decreases.
- both the illumination device 1 according to the first example and the illumination device 1 according to the second example are emitted from the illumination device 1 by changing the ratio of the light amounts of the light emitting units 312A and 312B.
- the balance between color rendering and saturation of white light can be set freely.
- the lighting device 1 emits the light amount of the first white light emitted from the first light emitting unit 312A and the second light emitting unit 312B by the light amount ratio control circuit 14e.
- the ratio of the amount of the second white light can be freely changed. Accordingly, the balance between the color rendering properties and the saturation of the white light emitted from the lighting device 1 can be freely set while maintaining the color temperature within the same range, so that the color of the illumination target of the lighting device 1 can be set. You can freely change the way you see. Therefore, for example, in a store that divides the same store into a plurality of floors and handles different types of products for each floor, it has color rendering and saturation suitable for each product without replacing the lighting device 1 or the like. Since light can be obtained, operations such as rearrangement of floors and replacement of products handled on each floor can be easily performed.
- FIG. 16A shows a plan view of the light-emitting device 201 according to the second embodiment
- FIG. 16B shows an enlarged view of the portion surrounded by the alternate long and short dash line A2 in FIG.
- the light emitting device 201 includes a substrate 2010, a plurality of first light emitting units 2012A and a plurality of second light emitting units 2012B arranged side by side on the substrate 2010. Here, eleven light emitting units 2012A and 2012B are arranged. Each of the light emitting units 2012A and 2012B has an elongated shape having a different length in plan view, and the plurality of light emitting units 2012A and 2012B have a circular shape in the plan view. Adjacent to each other in the short direction.
- the light emitting device 201 emits white light by using, for example, the electronic ballast described in the first embodiment.
- the white light emitted from the light emitting device 201 is a mixture of the first white light emitted from the first light emitting unit 2012A and the second white light emitted from the second light emitting unit 2012B.
- the light emitted from the light emitting device 201 becomes the second white light, and the light amount of the second light emitting unit 2012B is controlled to 0%.
- the light emitted from the light emitting device 201 is the first white light.
- the first white light and the second white light have the same color temperature, but have different color rendering properties and saturation.
- the substrate 2010 has a rectangular plate shape.
- the substrate 2010 has a two-layer structure composed of a plate material made of a metal material such as aluminum and an insulating film (insulating member) made of a heat conductive resin such as polycarbonate or ceramics provided on the surface of the plate material. is there.
- An electrode pad 2040A for the first light-emitting portion 2012A, a wiring pattern 2041A, and a land 2042A are formed on the surface of the substrate 2010 (the surface on the side where the insulating layer is located), and for the second light-emitting portion 2012B. Electrode pad 2040B, wiring pattern 2041B, and land 2042B (not shown) are formed.
- each of the plurality of light emitting units 2012A and the plurality of light emitting units 2012B is divided into two groups. For this reason, there are four electrode pads 2040A and 2040B for the light emitting portions 2012A and 2012B.
- the electrode pads 2040A and 2040B receive, for example, power for causing the light emitting units 2012A and 2012B to emit light, and are connected to, for example, an electronic ballast outside the light emitting device 201.
- the wiring patterns 2041A and 2041B are continuous with the electrode pads 2040A and 2040B of the light emitting units 2012A and 2012B.
- the lands 2042 ⁇ / b> A and 2040 ⁇ / b> B are for connecting two adjacent LEDs 320 with a wire 2095.
- the electrode pads 2040A and 2040B, the wiring patterns 2041A and 2041B, and the lands 2042A and 2042B are made of a metal material such as Ag or Cu.
- the wire 2095 is formed from a metal material such as Au.
- the substrate 2010 is not limited to the above structure, and may be, for example, a single layer structure made of a single non-conductive material or a multilayer structure of two or more layers.
- the eleven first light emitting units 2012A are divided into a group GR1 composed of four first light emitting units 2012A and a group GR2 composed of seven first light emitting units 2012A.
- the eleven second light emitting units 2012B are also arranged in a group GR3 including four second light emitting units 2012B and a group GR4 including seven second light emitting units 2012B.
- the first light emitting units 2021A belonging to the groups GR1 and GR2 are connected to two electrode pads 2040A for each group, and the second light emitting units 2021B belonging to the groups GR3 and GR4 are connected to two electrode pads for each group. 2040B is connected to each.
- the group GR1 and the group GR3 are adjacent to each other with the central portion of the substrate 2010 in the direction orthogonal to the longitudinal direction of the first light emitting unit 2012A and the second light emitting unit 2012B.
- the group GR2 is adjacent to the group GR3 on the side opposite to the group GR1 side with respect to the group GR3 in the direction orthogonal to the longitudinal direction of the first light emitting unit 2012A and the second light emitting unit 2012B.
- the group GR4 is adjacent to the group GR1 on the side opposite to the group GR3 side with respect to the group GR1 in the direction orthogonal to the longitudinal direction of the first light emitting unit 2012A and the second light emitting unit 2012B.
- the first light emitting unit 2012A includes a plurality of LEDs 320 arranged in a line on the substrate 2010, and a first wavelength conversion member 2030A that collectively seals the plurality of LEDs 320.
- the second light emitting unit 2012B also includes a plurality of LEDs 320 arranged in a line on the substrate 2010, and a second wavelength conversion member 2030B that collectively seals the plurality of LEDs 320. (Not shown).
- the first white light emitted from the first light emitting unit 2012A and the second white light emitted from the second light emitting unit 2012B have the same color temperature, but the color rendering properties and The saturation is different from each other, and the first white light has higher saturation and lower color rendering than the second white light. This is because the first light emitting unit 2012A and the second light emitting unit 2012B have different combinations of phosphors constituting a part of the first wavelength conversion member 2030A and the second wavelength conversion member 2030B.
- the wavelength conversion members 2030A and 2030B are each formed by dispersing a phosphor or the like on a translucent substrate.
- the type of phosphor or the like that is dispersed according to the color temperature, color rendering properties, and saturation required for white light emitted from the light emitting units 2012A and 2012B is selected.
- the first wavelength conversion member 2030A includes a yellow fluorescent substance, a red fluorescent substance, and a neodymium oxide that is a neodymium compound as a translucent substrate. Is distributed.
- a green phosphor and a red phosphor are dispersed in a translucent substrate.
- the first wavelength conversion member 2030A is made of a silicate green phosphor, a red phosphor, and a neodymium compound on a translucent substrate. Some neodymium oxide is dispersed. In the second wavelength conversion member 2030B, a green phosphor and a red phosphor are dispersed in a translucent substrate.
- Embodiment 1 since the same material as Embodiment 1 can be used for the material of a translucent base material and the material of yellow fluorescent substance, green fluorescent substance, and red fluorescent substance, description is abbreviate
- FIG. 17 A perspective view of the lamp unit 401 according to the present embodiment is shown in FIG. 17, and an exploded perspective view of the lamp unit 401 is shown in FIG.
- the lamp unit 401 incorporates the light emitting device 201 described in the second embodiment as a light source.
- the lamp unit 401 includes a base 420, a holder 430, a decorative cover 440, a cover 450, a cover pressing member 460, a wiring member 470, and the like.
- the base 420 has a disc shape and has a mounting portion 421 at the center on the upper surface side, and the light emitting device 201 is mounted on the mounting portion 421.
- screw holes 422 are provided on both sides of the mounting portion 421 on the upper surface side of the base 420.
- An insertion hole 423, a boss hole 424, and a notch 425 are provided on the periphery of the base 420.
- the base 420 is made of, for example, a metal material such as aluminum die cast.
- the holder 430 has a shape composed of a disc-shaped presser plate portion 431 and a cylindrical peripheral wall portion 432 continuous with the periphery of the presser plate portion 431.
- a window hole 433 is provided at the center of the presser plate portion 431.
- an insertion hole 436 through which the assembly screw 435 is inserted is provided through the circumferential portion of the presser plate portion 431.
- the holder 430 is attached to the base 420 by screwing the assembly screw 435 inserted through the insertion hole 436 into the screw hole 422 of the base 420. At this time, the light emitting device 201 is sandwiched between the base 420 and the holder 430.
- the decorative cover 440 has an annular shape and is disposed between the holder 430 and the cover 450 and covers the lead wire 471, the assembly screw 435, and the like.
- a window hole 441 is formed in the center of the decorative cover 440.
- the decorative cover 440 is made of a non-translucent material such as a white opaque resin.
- the cover 450 has a substantially dome-shaped main body portion 451 and an outer flange portion 452 extending outward from the peripheral edge of the main body portion 451, and the outer flange portion 452 is fixed to the base 420.
- the cover 450 is made of a translucent material such as silicone resin, acrylic resin, or glass, for example, and light emitted from the light emitting device 201 passes through the cover 450 and is extracted outside the lamp unit 401.
- the cover pressing member 460 has an annular plate shape, and is provided with cylindrical bosses 461 at two locations. Then, with the boss 461 inserted through the boss hole 424 of the base 420, the cover pressing member 460 is fixed to the base 420 by plastically deforming the tip of the boss 461. At this time, the outer flange portion 452 of the cover 450 is sandwiched between the cover pressing member 460 and the base 420.
- the cover pressing member 460 is made of a non-translucent material such as a metal material such as aluminum or a white opaque resin.
- the wiring member 470 has a lead wire 471 composed of four twisted pair wires electrically connected to the light emitting device 201, and the lead wire 471 has an end on the opposite side to the side connected to the light emitting device 201.
- a connector 472 is attached.
- the lead wire 471 is electrically connected to each of the two electrode pads 2040A and the two electrode pads 2040B.
- the lead wire 471 is led out of the base 420 through the notch 425 of the base 420.
- FIG. 19 is a cross-sectional view of the lighting device 501 according to this embodiment.
- the lighting device 501 includes the light emitting device 201 described in Embodiment 2 and a light amount ratio control unit.
- the lighting device 501 includes a lamp unit 401 (see Embodiment 3) including the light emitting device 201 as a light source, and an electronic ballast 504 in which a light amount ratio control unit is incorporated as a light amount ratio control circuit 504b.
- the lighting device 501 is a downlight that is mounted so as to be embedded in the ceiling C, and includes a fixture 503, an electronic ballast 504, a controller 505, and a lamp unit 401.
- the appliance 503 has a lamp storage part 503a, a ballast storage part 503b, and an outer casing part 503c.
- the instrument 503 is made of a metal material such as aluminum die cast, for example.
- the lamp storage portion 503a has a bottomed cylindrical shape, and the lamp unit 401 is detachably attached therein.
- the ballast storage portion 503b extends on the bottom side of the lamp storage portion 503a, and the electronic ballast 504 is stored therein.
- the outer flange portion 503c is annular and extends outward from the opening of the lamp storage portion 503a.
- the fixture 503 is embedded in the embedded hole C1 in which the lamp storage part 503a and the ballast storage part 503b are penetrated through the ceiling C, and the outer flange part 503c is applied to the peripheral part of the embedded hole C1 on the lower surface C2 of the ceiling C. In the contacted state, it is attached to the ceiling C by, for example, an attaching screw (not shown).
- the electronic ballast 504 includes a power supply circuit 504a that supplies power to each of the light emitting units 2012A and 2012B of the light emitting device 201 built in the lamp unit 401, the light amount of the first light emitting unit 2012A, and the second light emitting unit 2012B.
- a light amount ratio control circuit 504b that changes the ratio of the light amount.
- the electronic ballast 504 has a power line 504c that is electrically connected to the lamp unit 401, and a connector 504d that is connected to the connector 472 of the wiring member 470 of the lamp unit 401 at the tip of the power line 504c. Is attached.
- the power supply circuit 504a supplies power to the light emitting units 2012A and 2012B via the power supply line 504c and the wiring member 470, respectively.
- the electronic ballast 504 is connected to a controller 505 that is operated when the user changes the ratio of the light amount of the light emitting unit 2012A and the light amount of the light emitting unit 2012B via a signal line 505a. Then, the light amount ratio control circuit 504b, based on the signal voltage input from the controller 505 via the signal line 505a, the magnitude of the current supplied from the power supply circuit 504a to the light emitting unit 2012A, and the power supply circuit 504a to the light emitting unit 2012B. The ratio of the magnitude of the supplied current is changed. Thereby, the ratio of the light quantity of the light emitting part 2012A and the light quantity of the light emitting part 2012B changes.
- the ratio of the light amount of the light emitting unit 312A and the light amount of the light emitting unit 312B is changed by changing the magnitude of the current supplied to the light emitting unit 312A and the current supplied to the light emitting unit 312B.
- the means for changing the ratio is not limited to this.
- variable transmittance filter For example, by arranging a variable transmittance filter so as to cover each of the light emitting units 312A and 312B, making the magnitude of the current supplied to each of the light emitting units 312A and 312B constant, and changing the transmittance of the variable transmittance filter, A configuration in which the ratio between the light amount of the light emitting unit 312A and the light amount of the light emitting unit 312B is changed may be employed.
- the transmittance variable filter include a liquid crystal filter.
- the wavelength conversion member 330A contains a yellow phosphor and a red phosphor or a silicate green phosphor and a red phosphor
- the wavelength conversion member 330B contains a green phosphor and a red phosphor.
- the combination of the fluorescent substance to contain is not limited to this.
- the wavelength conversion member 330A may contain a red phosphor and a green phosphor other than the silicate system.
- the wavelength conversion member 330B may contain only a yellow phosphor.
- eleven first light emitting units 2012A constitute groups GR1 and GR2
- eleven second light emitting units 2012B constitute groups GR3 and GR4
- groups GR2 and GR2 are formed on the substrate 2010.
- FIGS. 20A and 20B are plan views of the light emitting devices 601 and 701 according to this modification.
- illustration of electrode pads and wiring patterns is omitted.
- a plurality of light emitting units 6012A and 6012B are alternately arranged on a substrate 2010 in a direction orthogonal to the longitudinal direction of the plurality of light emitting units 6012A and 6012B.
- the first light emitting unit 6012A emits first white light
- the second light emitting unit 6012B emits second white light.
- a plurality of concentric annular light emitting portions 7012A and 7012B are alternately arranged on the substrate 2010 in a direction away from the center.
- the first light emitting unit 7012A emits first white light
- the second light emitting unit 7012B emits second white light.
- the first light emitting units 6012A and 7012A that emit the first white light and the second light emitting unit that emits the second white light. 6012A and 7012B are more uniformly dispersed on the substrate 2010. Thereby, compared with the light-emitting device 201 described in Embodiment 2, it is possible to reduce the separation of the first and second white lights having different color rendering properties and saturation.
- Embodiment 2 has been described with respect to an example in which two types of elongated light emitting units 2012A and 2012B are arranged in parallel on a rectangular plate-shaped substrate 2010, two types of light emission are described.
- the shape and arrangement of the parts are not limited to this.
- FIGS. 21A to 21C and FIGS. 22A and 22B are plan views of light emitting devices 801, 901, 1001, 1101, and 1201 according to this modification.
- the light emitting devices 801, 901, and 1001 each include an elongated rectangular plate-shaped substrate 810.
- the light-emitting device 801 includes light-emitting portions 812A and 812B having two types of elongated wavelength conversion members 830A and 830B.
- the light emitting units 812A and 812B are disposed on the substrate 810 in a state where the longitudinal directions of the wavelength conversion members 830A and 830B coincide with the longitudinal direction of the substrate 810 and are aligned in the short direction of the substrate 810.
- the first white light is emitted from the first light emitting unit 812A
- the second white light is emitted from the second light emitting unit 812B.
- the light emitting device 901 includes light emitting units 912A and 912B having two types of dome-shaped wavelength conversion members 930A and 930B.
- the two types of light emitting portions 912A and 912B are alternately arranged in a row along the longitudinal direction of the substrate 810.
- the first white light is emitted from the first light emitting unit 912A
- the second white light is emitted from the second light emitting unit 912B.
- the light emitting device 1001 includes two types of so-called SMD type light emitting units 1012A and 1012B that output white light.
- Each light emitting unit 1012A, 1012B includes rectangular frame-shaped housings 1032A, 1032B surrounding the LEDs, and wavelength conversion members 1030A, 1030B arranged inside the housings 1032A, 1032B.
- the two types of light emitting units 1012A and 1012B are alternately arranged in a row along the longitudinal direction of the substrate 810.
- the first white light is emitted from the first light emitting unit 1012A
- the second white light is emitted from the second light emitting unit 1012B.
- the first white light is emitted from the first light emitting unit 1012A
- the second white light is emitted from the second light emitting unit 1012B.
- Each of the light emitting devices 1101 and 1201 includes a rectangular plate-shaped substrate 2010.
- the light emitting device 1101 includes light emitting portions 1112A and 1112B having two types of dome-shaped wavelength conversion members 1130A and 1130B.
- the light emitting units 1112A and 1112B are arranged in a matrix on the substrate 2010.
- at least one of the two light emitting units 1112A and 1112B adjacent in the matrix direction is different in type. Note that the first white light is emitted from the first light emitting unit 1112A, and the second white light is emitted from the second light emitting unit 1112B.
- the light emitting device 1201 includes two or more types of so-called SMD type light emitting units 1212A and 1212B.
- Each light emitting unit 1212A, 1212B includes rectangular frame-shaped housings 1232A, 1232B surrounding the LEDs, and wavelength conversion members 1230A, 1230B disposed inside the housings 1232A, 1232B.
- the two types of light emitting units 1212A and 1212B are arranged in a matrix on the substrate 2010.
- At least one of the two light emitting units 1112A and 1112B adjacent to each other in the matrix direction is different in type.
- the first white light is emitted from the first light emitting unit 912A
- the second white light is emitted from the second light emitting unit 912B.
- a light emitting device suitable for various lighting devices can be realized.
- the wavelength conversion member 2030A contains neodymium oxide, and the wavelength conversion member 2030B does not contain neodymium oxide, so that the first and second white lights are simultaneously emitted from the light emitting device 201. It was set as the structure radiate
- the configuration for simultaneously emitting the first and second white light is not limited to this, for example, from a translucent base material in which neodymium oxide is dispersed so as to cover a part of the plurality of light emitting portions.
- positions the following filter may be sufficient.
- FIG. 23 shows a plan view of the light emitting device 1301 according to this modification.
- symbol is attached
- a part of a plurality of light emitting portions 1312 of the same type is covered with a filter 1360 made of a translucent base material in which neodymium oxide is dispersed. Then, among the plurality of light emitting units 1312, the light output can be individually adjusted for those covered with the filter 1360 and those not covered.
- the example in which the light quantity ratio of the light emitting units 312A and 312B or the light emitting units 2012A and 2012B is controlled by the controllers 61 and 505 wired to the electronic ballasts 14 and 504 has been described.
- the controller is not necessarily limited to a wired connection to the electronic ballasts 14 and 504, and may be a wireless connection.
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Abstract
Description
<1>構成
<1-1>全体構成
本実施の形態に係る照明装置1の分解斜視図を図1に示す。
筐体11は、例えば、長尺箱状に形成されており、照明対象物側が開放されてなる開口部11aを有する。具体的には、筐体11は、細長の矩形板状の天板11bと、天板11bの4辺に連続する周壁11cとを備える。この筐体11は、アルミニウム等の金属材料から形成されている。ここにおいて、周壁11cの内面11dがランプ21から出射される光を反射する反射面を構成している。また、天板11bの長手方向の一端部下面には、給電側ソケット台16aを介して一対の給電側ソケット16bが取着されており、天板11bの長手方向の他端部下面には、接地側ソケット台17aを介して一対の接地側ソケット17bが取着されている。
ランプ21について、分解斜視図を図2(a)に示し、要部平面図を図2(b)に示し、図2(b)における一点鎖線A1で囲まれた部分の拡大図を図2(c)に示す。
図1に示すように、端子台13および電子式安定器14は、天板11bの長手方向における略中央部に取着されている。電子式安定器14は、外部電源(図示省略)から電源線L1および端子台13を介して供給される電力を変換し給電側ソケット台16aおよび給電側ソケット16bを介してランプ21に供給する。また、電子式安定器14には、ユーザが、第1発光モジュール31Aの第1発光部312Aの光量と第2発光モジュール31Bの第2発光部312Bの光量との比率を変化させる際に操作するコントローラ61が信号線62を介して接続されている。この電子式安定器14を含む照明装置1の回路構成の詳細については後述する。
カバー板15は、板材を横断面略C字状に折曲して形成されている。このカバー板15は、端子台13および電子式安定器14を天板11bの下面側から覆う(カバーする)ように天板11bにねじ止め等により取着される。このカバー板15は、アルミニウム等の金属材料から形成されている。
セード51は、矩形枠状の枠体51aと、透光性材料から矩形板状に形成され且つ枠体51aの内側に嵌め込まれた窓部材51bとを備える。枠体51aは、アルミニウム等の金属材料から形成されている。窓部材51bは、光を散乱する光散乱機能を有する。窓部材51bとして、例えば、ポリカーボネート等の樹脂材料、ガラス、セラミック等の透光性材料で形成された基体部分に、チタニア、シリカ、アルミナ、酸化亜鉛等の透光性材料で形成された粒子部分が分散されてなるものがある。
本実施の形態に係る照明装置の回路図を図3に示す。
図2(b)に示すように、第1発光モジュール31Aは、第1発光部312Aの他に、基板310と、配線340とを備える。そして、図2(c)に示すように、第1発光部312Aは、複数のLED320と第1波長変換部材330Aとから構成される。
本実施例は、第1の白色光および第2の白色光が、2700K付近となるように設定されている。
本実施例は、第1の白色光および第2の白色光が、5000K付近となるように設定されている。
結局、本実施の形態に係る照明装置1は、光量比率制御回路14eにより、第1発光部312Aから出射される第1の白色光の光量と、第2発光部312Bから出射される第2の白色光の光量との比率を自由に変化させることができる。これにより、色温度を同じ範囲内で維持しながら、照明装置1から出射される白色光の演色性と彩度のバランスを自由に設定することができるので、照明装置1の照明対象物の色の見え方を自由に変えることができる。従って、例えば、同一店舗内を複数のフロアに区切り、フロア毎に種類の異なる商品を扱うような店舗において、照明装置1の付け替え等を行うことなく各商品に適した演色性および彩度を有する光を得ることができるので、フロアの配置替えや各フロアで扱う商品を入れ替え等の作業を簡便に行うことができる。
本実施の形態2に係る発光装置201について、平面図を図16(a)に示し、図16(a)における一点鎖線A2で囲んだ部分の拡大図を図16(b)に示す。
本実施の形態に係るランプユニット401の斜視図を図17に示し、ランプユニット401の分解斜視図を図18に示す。
本実施の形態に係る照明装置501の断面図を図19に示す。
(1)実施の形態1では、発光部312Aに供給する電流の大きさと、発光部312Bに供給する電流の大きさとを替えることにより、発光部312Aの光量と発光部312Bの光量との比率を変化させていたが、この比率を変化させる手段はこれに限定されない。
14,504 電子式安定器
14e 光量比率制御回路
14f 電源回路
21,401 ランプ(照明用光源)
31A,31B,201 発光装置
312A,312B,2012A,2012B,6012A,6012B,7012A,7012B 発光部
Claims (17)
- 第1の白色光を出射する第1発光部と、
第2の白色光を出射する第2発光部と、
前記第1発光部の光量と前記第2発光部の光量との比率を制御する光量比率制御部とを備え、
前記第1の白色光と前記第2の白色光とは色温度が同じ範囲内であり、前記第1の白色光は、前記第2の白色光に比べて彩度が高く且つ演色性が低い
ことを特徴とする照明装置。 - 前記色温度が同じ範囲内とは、xy色度図において、前記第1の白色光の色度および前記第2の白色光の色度の両方が、同一の等色温度認識領域内に存在することであり、
xy色度図における前記等色温度認識領域の外周形状は、等色温度認識領域の中心色度に対応するMacAdamの楕円の長軸および短軸それぞれの長さを3倍してなる楕円形状である
ことを特徴とする請求項1記載の照明装置。 - 前記第1発光部は、
第1発光素子と、
透光性基材に1種類以上の蛍光体が分散されてなり且つ前記第1発光素子を覆う第1波長変換部材とを有し、
前記第2発光部は、
第2発光素子と、
透光性基材に1種類以上の蛍光体が分散されてなり且つ前記第2発光素子を覆う第2波長変換部材とを有し、
前記第1波長変換部材と前記第2波長変換部材とでは、前記透光性基材に分散された蛍光体の組み合わせが互いに異なる
ことを特徴とする請求項1または請求項2記載の照明装置。 - 前記第1波長変換部材は、前記透光性基材に黄色蛍光体および赤色蛍光体が分散されてなり、
前記第2波長変換部材は、前記透光性基材に緑色蛍光体および赤色蛍光体が分散されてなる
ことを特徴とする請求項3記載の照明装置。 - 前記第1波長変換部材は、前記透光性基材に赤色蛍光体が分散されてなり、
前記第2波長変換部材は、前記透光性基材に緑色蛍光体および赤色蛍光体が分散されてなる
ことを特徴とする請求項3記載の照明装置。 - 前記第1波長変換部材は、更に、前記透光性基材にシリケート系の緑色蛍光体が分散されてなる
ことを特徴とする請求項5記載の照明装置。 - 前記第1波長変換部材は、更に、前記透光性基材にネオジム化合物が分散されてなる
ことを特徴とする請求項4乃至6のいずれか1項に記載の照明装置。 - 前記第1発光部および前記第2発光部それぞれに各別に電流供給を行う電源回路を更に備え、
前記光量比率制御部は、前記電源回路から前記第1発光部に供給する電流の大きさと、前記電源回路から前記第2発光部に供給する電流の大きさとの比率を変化させることにより、前記第1発光部の光量と前記第2発光部の光量との比率を変化させる
ことを特徴とする請求項1乃至7のいずれか1項に記載の照明装置。 - 第1の白色光を出射する第1発光部と、
第2の白色光を出射する第2発光部とを備え、
前記第1の白色光と前記第2の白色光とは色温度が同じ範囲内であり、前記第1の白色光は、前記第2の白色光に比べて演色性が高く且つ彩度が低い
ことを特徴とする発光装置。 - 前記色温度が同じ範囲内とは、xy色度図において、前記第1の白色光の色度および前記第2の白色光の色度の両方が、同一の等色温度認識領域内に存在することであり、
xy色度図における前記等色温度認識領域の外周形状は、等色温度認識領域の中心色度に対応するMacAdamの楕円の長軸および短軸それぞれの長さを3倍してなる楕円形状である
ことを特徴とする請求項9記載の発光装置。 - 前記第1発光部は、
第1発光素子と、
透光性基材に1種類以上の蛍光体が分散されてなり且つ前記第1発光素子を覆う第1波長変換部材とを有し、
前記第2発光部は、
第2発光素子と、
透光性基材に1種類以上の蛍光体が分散されてなり且つ前記第2発光素子を覆う第2波長変換部材とを有し、
前記第1波長変換部材と前記第2波長変換部材とでは、前記透光性基材に分散された蛍光体の組み合わせが互いに異なる
ことを特徴とする請求項9または請求項10記載の発光装置。 - 前記第1波長変換部材は、前記透光性基材に黄色蛍光体および赤色蛍光体が分散されてなり、
前記第2波長変換部材は、前記透光性基材に緑色蛍光体および赤色蛍光体が分散されてなる
ことを特徴とする請求項11記載の発光装置。 - 前記第1波長変換部材は、前記透光性基材に赤色蛍光体が分散されてなり、
前記第2波長変換部材は、前記透光性基材に緑色蛍光体および赤色蛍光体が分散されてなる
ことを特徴とする請求項11記載の発光装置。 - 前記第1波長変換部材は、更に、前記透光性基材にシリケート系の緑色蛍光体が分散されてなる
ことを特徴とする請求項13記載の発光装置。 - 前記第1波長変換部材は、更に、前記透光性基材にネオジム化合物が分散されてなる
ことを特徴とする請求項12乃至14のいずれか1項に記載の発光装置。 - 基板を備え、
前記第1発光部および前記第2発光部は、細長形状であり、前記基板上に、前記第1発光部および前記第2発光部の長手方向に直交する方向に交互に並列されている
ことを特徴とする請求項9乃至15のいずれか1項に記載の発光装置。 - 基板を備え、
前記第1発光部および前記第2発光部は、同心環状であり、前記基板上に、中心から離れる方向に交互に配置されている
ことを特徴とする請求項9乃至15のいずれか1項に記載の発光装置。
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JPH06180248A (ja) * | 1992-12-15 | 1994-06-28 | Matsushita Electric Ind Co Ltd | 演色性評価手法 |
JP2008181874A (ja) * | 2006-12-28 | 2008-08-07 | Toshiba Lighting & Technology Corp | 照明システム |
WO2009041171A1 (ja) * | 2007-09-26 | 2009-04-02 | Toshiba Lighting & Technology Corporation | 照明装置 |
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JPH06180248A (ja) * | 1992-12-15 | 1994-06-28 | Matsushita Electric Ind Co Ltd | 演色性評価手法 |
JP2008181874A (ja) * | 2006-12-28 | 2008-08-07 | Toshiba Lighting & Technology Corp | 照明システム |
WO2009041171A1 (ja) * | 2007-09-26 | 2009-04-02 | Toshiba Lighting & Technology Corporation | 照明装置 |
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US10121941B2 (en) | 2015-09-30 | 2018-11-06 | Nichia Corporation | Light source device |
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