JP6145679B2 - Light source module and lighting device - Google Patents

Description

  The present invention relates to a light source module including a solid light emitting element and an illumination device.

  2. Description of the Related Art Conventionally, as an illumination system, an illumination system that includes an illumination device including a light source, a control device, and an illuminance sensor and controls the color temperature and illuminance of the light source based on a circadian rhythm has been proposed. (Patent Document 1).

  Patent Document 1 describes that an LED (light emitting diode) can be used as a light source of a lighting device.

  Moreover, as an illuminating device, the thing provided with two types of LED modules from which color temperature differs mutually is proposed (patent document 2).

  In the lighting device described in Patent Document 2, the color temperature of the daylight color LED module of the two types of LED modules is set to about 6700K, and the color temperature of the light bulb color LED module is set to about 2700K. Patent Document 2 describes that the dimming rate between the daylight color LED module and the light bulb color LED module is adjusted based on the correlation with the human biological rhythm for 24 hours. In this lighting device, only the daylight color LED module is turned on at a dimming rate of 100% from the wake-up time to 1 hour before the dinner time, and the light bulb color is changed from the dinner time to 2 hours before the bedtime. Only the LED module is turned on at a dimming rate of 100%. This lighting device includes a plurality of sets of one daylight color LED module and one light bulb color LED module.

JP 2011-23339 A International Publication WO2011 / 136007 A1

  The illumination system described in Patent Document 1 merely controls the color temperature and illuminance of the light source based on the circadian rhythm, and considers the compatibility between the biological action effect on the human body and the good skin appearance. It is not.

  Moreover, the illuminating device described in Patent Document 2 is not an illuminating device that takes into consideration both the biological effect on the human body and the good appearance of the skin.

  The present invention has been made in view of the above-described reasons, and an object thereof is to provide a light source module and an illuminating device capable of achieving both a biological action effect for adjusting a circadian rhythm and a good skin appearance.

  The light source module of the present invention includes a first light emitting device, a second light emitting device, and a third light emitting device having different emission spectra. The first light emitting device includes a first solid-state light emitting element, and a first wavelength including a first wavelength conversion material that converts a part of light emitted from the first solid-state light emitting element to emit light having a different wavelength. A conversion unit. The second light-emitting device includes a second solid-state light-emitting element and a second wavelength-converting material that converts a part of light emitted from the second solid-state light-emitting element to emit light having a different wavelength. A conversion unit. The third light emitting device includes a third solid-state light emitting element, and a third wavelength including a third wavelength conversion material that converts a part of light emitted from the third solid-state light emitting element to emit light having a different wavelength. A conversion unit. The light source module of the present invention is calculated by the following equation (1) from the spectral distribution of the first synthesized light obtained by combining the light emitted from the first light emitting device and the light emitted from the second light emitting device. The bioactivity (DIN) showing the melatonin secretion inhibitory effect is at least 0.85. In the light source module of the present invention, the correlated color temperature of the first combined light is 5000K or more and 7100K or less. In the light source module of the present invention, the skin color preference index (PS) calculated from the spectral distribution of the first synthesized light is at least 60. The light source module of the present invention is calculated by the following equation (1) from the spectral distribution of the second combined light obtained by combining the light emitted from the second light emitting device and the light emitted from the third light emitting device. The bioactivity (DIN) showing the melatonin secretion inhibitory effect is 0.25 or less. In the light source module of the present invention, the correlated color temperature of the second combined light is 2000K or more and 3250K or less.

  Here, S (λ) is a spectral distribution of the first synthetic light or the second synthetic light, A (λ) is an action function for suppressing melatonin secretion, and V (λ) is relative luminous efficiency.

  In this light source module, it is preferable that a correlated color temperature of the first combined light is 6000K or more and 7100K or less.

  In this light source module, it is preferable that the PS of the first combined light is at least 80.

  In this light source module, it is preferable that an average color rendering index Ra of the first combined light is at least 85.

In the light source module, it the first combined light deviation (d _uv) 1000 times the value of the blackbody radiation locus in the chromaticity coordinates of (D _UV = 1000d _uv) is in the range from -5 +2 preferable.

  In this light source module, the spectral distribution of the first synthesized light has a first peak wavelength in the range of 400 nm to 470 nm, a second peak wavelength in the range of 471 nm to 550 nm, and a range of 551 nm to 670 nm. Preferably, the second peak wavelength and the third peak wavelength are in the range of 80 nm to 120 nm.

  In this light source module, it is preferable that the correlated color temperature of the second combined light is 2000K or more and 2500K or less.

  In this light source module, it is preferable that the skin color preference index (PS) calculated from the spectral distribution of the second synthesized light is at least 80.

  In this light source module, it is preferable that an average color rendering index Ra of the second combined light is at least 80.

In the light source module, it the second combined light deviation (d _uv) 1000 times the value of the blackbody radiation locus in the chromaticity coordinates of (D _UV = 1000d _uv) is in the range from -5 +2 preferable.

  In this light source module, the spectral distribution of the second synthesized light preferably has a first peak wavelength in the range of 400 nm to 470 nm and a second peak wavelength in the range of 551 nm to 670 nm.

  In the light source module, the first wavelength conversion unit is formed of a mixture of the first wavelength conversion material and a first light-transmissive material that transmits visible light, and covers the first solid-state light-emitting element. The second wavelength conversion unit is formed of a mixture of the second wavelength conversion material and a second light-transmissive material that transmits visible light, and covers the second solid-state light-emitting element, The third wavelength conversion unit is preferably formed of a mixture of the third wavelength conversion material and a third light transmissive material that transmits visible light, and covers the second solid state light emitting device.

  In the light source module, the first solid light emitting element, the second solid light emitting element, and the third solid light emitting element are preferably light emitting diodes having a peak wavelength in a range of 400 nm to 470 nm.

  In this light source module, the first wavelength conversion material includes a blue-green phosphor having a peak wavelength in a range of 471 nm to 550 nm, and the second wavelength conversion material has a yellow green color having a peak wavelength in a range of 551 nm to 600 nm. It is preferable that the phosphor includes a red phosphor having a peak wavelength in the range of 551 nm to 670 nm, and the third wavelength conversion material includes a red phosphor having a peak wavelength in the range of 630 nm to 670 nm.

  The lighting device of the present invention includes a plurality of the light source modules. The illumination device of the present invention includes a control unit that controls power supplied from a power source to the plurality of light source modules, a time setting unit that sets time, a time set by the time setting unit, and control in the control unit A storage unit that stores a time schedule that defines a relationship with the content; and a clock unit that measures time. The time set by the time setting unit includes a wake-up time and a bedtime. Based on the current time measured by the clock unit and the time schedule stored in the storage unit, the control unit starts from a time that is a predetermined time before the wake-up time set by the time setting unit. The plurality of light source modules are turned on so that the first synthesized light is emitted mainly during the evening, and the second synthesized light is emitted mainly from the evening until the bedtime set by the time setting unit. In this manner, the plurality of light source modules are turned on.

  In this illumination device, the combined light of the first combined light and the second combined light is white light, and the white light has a correlated color temperature of 2000K to 7100K, and is calculated from the spectral distribution of the white light. Preferably, the skin color preference index (PS) is at least 60 and the average color rendering index Ra is at least 85.

  In this lighting device, the PS of the white light is preferably at least 80.

In this illumination device, it is preferable that one of the first combined light D _uv and the second combined light D _uv has a positive value and the other has a negative value.

  In the light source module of the present invention, it is possible to achieve both a biological effect that suppresses melatonin secretion and a good skin appearance in order to adjust the circadian rhythm.

  In the illuminating device of the present invention, it is possible to achieve both a biological effect that adjusts the circadian rhythm and a good skin appearance.

FIG. 1 is a schematic cross-sectional view of the light source module of the first embodiment. FIG. 2 is an emission spectrum of the first light emitting device in the light source module of the first embodiment. FIG. 3 is an emission spectrum of the second light emitting device in the light source module of the first embodiment. FIG. 4 is an emission spectrum of the third light emitting device in the light source module of the first embodiment. FIG. 5 is a spectral distribution of the first combined light emitted from the light source module according to the first embodiment. FIG. 6 is a spectral distribution of the second combined light emitted from the light source module according to the first embodiment. FIG. 7 is an explanatory diagram of an action function for inhibiting melatonin secretion and a specific luminous efficiency function. FIG. 8 is a schematic configuration diagram of the illumination device of the second embodiment. FIG. 9 is an explanatory diagram of the chromaticity trajectory of the combined light of the lighting apparatus according to the second embodiment. FIG. 10 is a spectral distribution when the correlated color temperature is 5002K with respect to the combined light of the lighting apparatus according to the second embodiment. FIG. 11 shows the spectral distribution when the correlated color temperature is 3990K for the combined light of the illumination device of the second embodiment. FIG. 12 is a spectral distribution when the correlated color temperature is 2999K for the combined light of the lighting apparatus according to the second embodiment. FIG. 13 is a diagram for explaining the operation of the lighting apparatus according to the second embodiment.

(Embodiment 1)
Below, the light source module 10 of this embodiment is demonstrated based on FIGS.

  The light source module 10 includes a first light emitting device 1, a second light emitting device 2, and a third light emitting device 3 having different emission spectra. The first light-emitting device 1 includes a first solid-state light-emitting element 11 and a first wavelength conversion material that converts a part of light emitted from the first solid-state light-emitting element 11 to emit light having different wavelengths. A wavelength converter 12. The second light-emitting device 2 includes a second solid-state light-emitting element 21 and a second wavelength conversion material that converts the wavelength of part of the light emitted from the second solid-state light-emitting element 21 and emits light having a different wavelength. A wavelength conversion unit 22. The third light-emitting device 3 includes a third solid-state light-emitting element 31 and a third wavelength conversion material that converts the wavelength of part of the light emitted from the third solid-state light-emitting element 31 and emits light having a different wavelength. A wavelength conversion unit 32. The light source module 10 is a melatonin calculated by the following formula (1) from the spectral distribution of the first synthesized light obtained by combining the light emitted from the first light emitting device 1 and the light emitted from the second light emitting device 2. The bioactivity (DIN) showing the secretion inhibitory effect is at least 0.85. Further, the light source module 10 has a correlation color temperature of the first synthesized light of 5000 K or more and 7100 K or less, and is calculated from a spectral distribution of the first synthesized light (Preference Index of Skin Color: PS). ) Is at least 60. The light source module 10 is calculated by the following equation (1) from the spectral distribution of the second combined light obtained by combining the light emitted from the second light emitting device 2 and the light emitted from the third light emitting device 3. The bioactivity (DIN) showing the melatonin secretion inhibitory effect is 0.25 or less. In the light source module 10, the correlated color temperature of the second combined light is 2000K or more and 3250K or less.

  Here, S (λ) is a spectral distribution of the first synthetic light or the second synthetic light, A (λ) is an action function for suppressing melatonin secretion, and V (λ) is relative luminous efficiency.

  The light source module 10 is configured such that the DIN of the first synthesized light is 0.85 or more, the correlated color temperature is 5000 K or more and 7100 K or less, and the PS is 60 or more, and the DIN of the second synthesized light is 0.25 or less, The correlated color temperature is configured to be 2000K to 3250K. As a result, the light source module 10 can achieve both a biological effect that adjusts the circadian rhythm and good skin appearance. The light source module 10 can be installed, for example, in a room of a resident of an elderly welfare facility or a hospital room of a hospital inpatient. The light source module 10 mainly emits first synthesized light as illumination light during the daytime from the time of getting up, thereby suppressing the melatonin secretion of residents in elderly welfare facilities and hospitalized patients in hospital rooms and adjusting the circadian rhythm. Moreover, it is possible to produce an environment with a good skin appearance. In addition, the light source module 10 emits the second synthesized light mainly as an illumination light from the evening to the night before the turn-off time, thereby preventing the melatonin secretion from residents and hospitalized patients from being disturbed and adjusting the circadian rhythm. Can be provided. The circadian rhythm means a rhythm with a cycle close to 24 hours that appears as behavior and physical function to people living on the earth. A cycle close to 24 hours means a cycle of 24 ± 4 hours or 24 ± 5 hours.

  Each component of the light source module 10 will be described in more detail below.

  The 1st solid light emitting element 11, the 2nd solid light emitting element 21, and the 3rd solid light emitting element 31 are comprised by the light emitting diode (light emitting diode: LED). The 1st solid light emitting element 11, the 2nd solid light emitting element 21, and the 3rd solid light emitting element 31 can be comprised by LED which has a peak wavelength in the range of 400 nm-470 nm, for example. That is, the 1st solid light emitting element 11, the 2nd solid light emitting element 21, and the 3rd solid light emitting element 31 can be comprised by LED which radiates | emits blue light whose peak wavelength exists in the range of 400 nm-470 nm.

  The LED can be composed of an LED chip that emits blue light. As the LED chip that emits blue light, for example, a gallium nitride blue LED chip can be adopted. The LED may be, for example, an LED chip housed in a package. The number of LED chips housed in the package may be one or more. In addition, the 1st solid light emitting element 11, the 2nd solid light emitting element 21, and the 3rd solid light emitting element 31 may be comprised not only by LED but a laser diode (semiconductor laser), for example.

  As the LED chip, one having a chip size of 0.3 mm □ (0.3 mm × 0.3 mm), 0.45 mm □ (0.45 mm × 0.45 mm), 1 mm □ (1 mm × 1 mm), or the like is used. it can. Further, the planar shape of the LED chip is not limited to a square shape, and may be a rectangular shape, for example. When the planar shape is a rectangular shape, for example, a LED chip having a chip size of 0.5 mm × 0.24 mm can be used.

  The 1st solid light emitting element 11, the 2nd solid light emitting element 21, and the 3rd solid light emitting element 31 are provided with the 1st electrode and the 2nd electrode. In the first solid-state light-emitting element 11, the second solid-state light-emitting element 21, and the third solid-state light-emitting element 31, one of the first electrode and the second electrode is an anode electrode, and the other is a cathode electrode.

  The light source module 10 preferably includes a mounting substrate 13 on which the first solid state light emitting element 11, the second solid state light emitting element 21, and the third solid state light emitting element 31 are mounted. The mounting substrate 13 is a substrate on which the first solid state light emitting device 11, the second solid state light emitting device 21, and the third solid state light emitting device 31 are mounted. “Mounting” is a concept including arranging, mechanically connecting, and electrically connecting the first solid-state light-emitting element 11, the second solid-state light-emitting element 21, and the third solid-state light-emitting element 31.

  The mounting substrate 13 includes a support body 14 and a wiring portion (not shown) that is supported by the support body 14 and electrically connected to the first solid state light emitting element 11, the second solid state light emitting element 21, and the third solid state light emitting element 31. And comprising.

  The wiring portion corresponds to each of the first solid state light emitting device 11, the second solid state light emitting device 21, and the third solid state light emitting device 31, and the first conductor portion to which the first electrode is electrically connected and the second electrode are electrically connected. There are three sets of second conductor parts connected to each other.

  The support body 14 has a function of supporting the wiring portion. Further, the support 14 has a function as a heat sink for efficiently transferring the heat generated in the first solid light emitting element 11, the second solid light emitting element 21 and the third solid light emitting element 31 to the outside. It is preferable. For this reason, it is preferable that the support body 14 is formed of a material having high thermal conductivity from the viewpoint of improving heat dissipation, and can be formed of, for example, an aluminum nitride substrate.

The support 14 is not limited to an aluminum nitride substrate, and may be formed of, for example, a sapphire substrate or a silicon carbide substrate. The support 14 may have a configuration in which an electrical insulating layer is formed on the surface of a silicon substrate, or a configuration in which an electrical insulating layer made of an appropriate material is formed on the surface of a metal plate. The material of the metal plate is preferably a metal having high thermal conductivity. As the material of the metal plate, for example, copper, aluminum, silver, iron, aluminum alloy, phosphor bronze, copper alloy, nickel alloy, Kovar, or the like can be adopted. For example, SiO ₂ or Si ₃ N ₄ can be used as the material of the electrical insulating layer formed on the surface of the silicon substrate.

  The mounting substrate 13 has a support 14 formed in a flat plate shape. In the mounting substrate 13, the shape of the support 14 is not limited to a flat plate shape, and, for example, a recess for housing the first solid light emitting element 11, the second solid light emitting element 21, and the third solid light emitting element 31 is formed on one surface. It may be a thing.

  The outer peripheral shape of the support 14 is rectangular. The outer peripheral shape of the support 14 is not limited to a rectangular shape, and may be, for example, a polygonal shape other than a rectangular shape, a circular shape, or the like. The planar size of the support 14 is set larger than the combined size of the first solid light emitting element 11, the second solid light emitting element 21, and the third solid light emitting element 31.

  The mounting substrate 13 does not specifically limit the number of each of the first solid light emitting element 11, the second solid light emitting element 21, and the third solid light emitting element 31 that can be mounted. For example, the mounting substrate 13 may be configured to be capable of mounting a plurality of each of the first solid state light emitting element 11, the second solid state light emitting element 21, and the third solid state light emitting element 31. The light source module 10 may have a configuration in which a plurality of first solid light emitting elements 11, a plurality of second solid light emitting elements 21, and a plurality of third solid light emitting elements 31 are connected in series, or in parallel. You may have the structure connected and may have the structure connected in series and parallel.

  In the first light emitting device 1, the first wavelength conversion unit 12 is formed of a mixture of a first wavelength conversion material and a first light transmissive material that transmits visible light, and covers the first solid light emitting element 11. Preferably it is. Accordingly, in the first light emitting device 1, when the LED chip is used as the first solid light emitting element 11, the first wavelength conversion unit 12 also serves as a sealing unit that seals the first solid light emitting element 11. Is possible.

  In the second light emitting device 2, the second wavelength conversion unit 22 is formed of a mixture of the second wavelength conversion material and the second light transmissive material that transmits visible light, and covers the second solid light emitting element 21. Preferably it is. Thereby, the 2nd wavelength conversion part 22 serves as the sealing part which seals the 2nd solid light emitting element 21, when the 2nd light emitting device 2 uses an LED chip as the 2nd solid light emitting element 21, etc. Is possible.

  In the third light emitting device 3, the third wavelength conversion unit 32 is formed of a mixture of a third wavelength conversion material and a third light transmissive material that transmits visible light, and covers the third solid light emitting element 31. Preferably it is. Accordingly, in the third light emitting device 3, when the LED chip is used as the third solid light emitting element 31, the third wavelength conversion unit 32 also serves as a sealing unit that seals the third solid light emitting element 31. Is possible.

  In the light source module 10, the first wavelength conversion unit 12, the second wavelength conversion unit 22, and the third wavelength conversion unit 32 have a hemispherical shape. The shapes of the first wavelength conversion unit 12, the second wavelength conversion unit 22, and the third wavelength conversion unit 32 are not limited to a hemispherical shape, and may be, for example, a semi-elliptical spherical shape or a rectangular parallelepiped shape. In the light source module 10, one first solid-state light emitting element 11 is covered by one first wavelength conversion unit 12, but the present invention is not limited to this, and a plurality of first wavelength conversion units 12 are formed by one first wavelength conversion unit 12. You may comprise so that the solid light emitting element 11 may be covered. In this case, the light source module 10 may change the shape of the first wavelength conversion unit 12 as appropriate based on the arrangement of the plurality of first solid state light emitting elements 11. For example, in the light source module 10, when the mounting substrate 13 has a long and narrow rectangular shape and a plurality of first solid state light emitting elements 11 are arranged in the longitudinal direction of the mounting substrate 13, the first wavelength conversion unit 12. Can be formed in a semi-cylindrical shape covering the plurality of first solid state light emitting elements 11. The light source module 10 covers one second solid-state light emitting element 21 with one second wavelength conversion unit 22, but is not limited to this, and a plurality of light source modules 10 are formed with one second wavelength conversion unit 22. You may comprise so that the 2nd solid light emitting element 21 may be covered. In addition, the light source module 10 covers one third solid-state light emitting element 31 with one third wavelength conversion unit 32, but is not limited to this, and a plurality of one light source modules 10 are formed with one third wavelength conversion unit 32. You may comprise so that the 3rd solid light emitting element 31 may be covered.

  As the first wavelength conversion material, a phosphor that is excited by light emitted from the first solid state light emitting element 11 and emits light having a color different from the emission color of the first solid state light emitting element 11 can be used. As the first translucent material, a silicone resin is used. However, the present invention is not limited to this. For example, an acrylic resin, glass, an organic / inorganic hybrid material, or the like can be used.

  The light emitted from the first light emitting device 1 is the light emitted from the first solid-state light emitting element 11 and emitted from the first wavelength conversion unit 12 without being wavelength-converted by the first wavelength conversion unit 12, and the first wavelength. This means mixed color light that has been wavelength-converted by the conversion material and emitted from the first wavelength conversion unit 12.

  As the second wavelength conversion material, a phosphor or the like that is excited by light emitted from the second solid state light emitting element 21 and emits light having a color different from the emission color of the second solid state light emitting element 21 can be used. As the second translucent material, a silicone resin is used. However, the present invention is not limited thereto, and for example, an acrylic resin, glass, an organic / inorganic hybrid material, or the like can be used.

  The light emitted from the second light-emitting device 2 is the light emitted from the second solid-state light emitting element 21 and emitted from the second wavelength conversion unit 22 without being wavelength-converted by the second wavelength conversion unit 22, and the second wavelength. This means mixed color light with light that has been wavelength-converted by the conversion material and emitted from the second wavelength conversion unit 22.

  As the third wavelength conversion material, a phosphor that is excited by light emitted from the third solid state light emitting device 31 and emits light of a color different from the emission color of the third solid state light emitting device 31 can be used. As the first translucent material, a silicone resin is used. However, the present invention is not limited to this. For example, an acrylic resin, glass, an organic / inorganic hybrid material, or the like can be used.

  The light emitted from the third light-emitting device 3 is the light emitted from the third solid-state light emitting element 31 and emitted from the third wavelength conversion unit 32 without being wavelength-converted by the third wavelength conversion unit 32, and the third wavelength. This means mixed color light that is wavelength-converted by the conversion material and emitted from the third wavelength conversion unit 32.

  In the light source module 10, the first light emitting device 1, the second light emitting device 2, and the third light emitting device 3 have different emission spectra. FIG. 2 shows an example of the emission spectrum of the first light emitting device 1. FIG. 3 shows an example of the emission spectrum of the second light emitting device 2. FIG. 4 shows an example of the emission spectrum of the third light emitting device 3. FIG. 5 shows an example of the spectral distribution of the first synthesized light emitted from the light source module 10. FIG. 6 shows an example of the spectral distribution of the second synthesized light emitted from the light source module 10.

  In the light source module 10, the DIN of the first combined light is 0.85 or more, and the DIN of the second combined light is 0.25 or less. The integrated wavelength range in the denominator and numerator of the right side of the above equation (1) may be the visible light wavelength range, and may be, for example, 380 nm to 780 nm. Therefore, the expression (1) can be expressed as the following expression (2).

  S (λ) is the spectral distribution of the first synthesized light or the second synthesized light. λ is a wavelength. S (λ) may be a relative representation of the spectral distribution with reference to the maximum value of the spectral distribution. The spectral distribution and the relative spectral distribution are defined in, for example, JIS Z8113: 1998, IEC 60050-845, and the like.

  A (λ) is an action function for suppressing melatonin secretion. The action function of suppressing melatonin secretion is an action-effect curve that suppresses melatonin secretion and promotes adjustment of biological rhythm and arousal of the living body, and is a curve as shown by a solid line in FIG. λ is a wavelength. The action function A (λ) for suppressing melatonin secretion becomes an upwardly convex curve in the range of about 400 nm to about 600 nm, and has a peak near the wavelength λ of 464 nm. For example, reference function 1: GC Brainer, “Action Spectrum for Melatonin Regulation in Humans: Evidence for a Novel Circadian Photoreceptor”, The Journal of Neuroscience, August 15, 2001, 21 (16 ), Pp.6405-6412) and the like. The standard relative luminous sensitivity curve is a curve as shown by a one-dot chain line in FIG.

  V (λ) is specific luminous efficiency. λ is a wavelength. The specific visibility is defined in, for example, JIS Z8113: 1998 and IEC 60050-845. As the specific luminous efficiency, it is preferable to use the CIE standard specific luminous efficiency of photopic vision.

  The short wavelength limit of the visible light wavelength range is in the range of 360 nm to 400 nm. The long wavelength limit of the visible light wavelength range is in the range of 760 nm to 830 nm. Therefore, the integrated wavelength range may be 360 nm to 830 nm.

  The light source module 10 can suppress the melatonin secretion of the person in the illumination space as the DIN of the first synthesized light is larger. The illumination space is a space illuminated by the first combined light and the second combined light from the light source module 10. Illumination spaces include, for example, rooms for residents in elderly welfare facilities and hospital rooms for hospital inpatients.

In the light source module 10, the correlated color temperature of the first combined light is 5000K or more and 7100K or less. The correlated color temperature is used to represent the light color of the light source (here, the light source module 10), and is defined as the absolute temperature of black body radiation having the chromaticity coordinate closest to the uv chromaticity coordinate of the light source. Is done. The correlated color temperature is defined in JIS Z8113: 1998, IEC 60050-845, and the like. The correlated color temperature is a value obtained in accordance with, for example, the correlated color temperature measurement method defined in JIS Z8725: 1999. The chromaticity coordinates of the black body radiation closest to the chromaticity coordinates of the light source are perpendicular to the black body radiation locus from the point of the chromaticity coordinates of the light source in the CIE 1960 UCS (uniform-chromaticity-scale) chromaticity coordinates. It is calculated as an intersection of times. 5000K is a typical correlated color temperature in the range of correlated white color temperature (4600K to 5500K) defined by JIS Z9112: 2004 or the like. 7100K is, JIS Z9112: the upper limit of the correlated color temperature of daylight defined in 2004 or the like, also as the upper limit of the correlated color temperature of the fluorescent lamp used as a conventional light source D _65, defined by IEC 60050 or the like.

  In the light source module 10, the correlated color temperature of the first combined light is preferably 6000 K or more and 7100 K or less. Thereby, the light source module 10 can make the lower limit value of DIN of the first combined light higher. 6000K is the color temperature of sunny daylight.

  The light source module 10 has a PS that is a skin color preference index of the first combined light of 60 or more. Therefore, the light source module 10 can suppress circadian rhythm by suppressing the melatonin secretion of residents in elderly welfare facilities and hospitalized patients in hospital rooms if the first synthesized light is mainly illumination light from the time of getting up. It is possible to produce an environment that is smooth and has good skin appearance.

PS is a value indicating the preference of skin color. PS is described in Reference 2 [Kenjiro Hashimoto et al., “Evaluation Method of Preference for Japanese Women's Skin Color under Illuminated Light”, Illumination Society Journal, Vol.82, No.11, p895, 1998] and reference It can be derived according to the disclosure process of Document 3 (Japanese Patent Laid-Open No. 11-258047). That is, in the calculation procedures described in Reference Documents 2 and 3, PS is the spectral distribution of the first synthesized light or the second synthesized light of the light source module 10 instead of the spectral distribution and chromaticity coordinates of the illumination lamp. Each degree coordinate can be used and derived. In short, in the PS calculation procedure, the PS can be calculated using the calculation formula of PS = 4 × 5 ^P after obtaining the calculated evaluation value P regarding the preference of the skin color. The skin color preference index is a value indicating the preference of the skin color as described above. In other words, the skin color preference index is a value indicating the preference of the human skin color appearance.

The light source module 10 preferably has a PS of the first combined light of at least 80. PS is defined as 80 for the light of the standard light source D ₆₅ . Therefore, the light source module 10 can make the color of the skin appear to be equal to or better than the light of the standard light source D ₆₅ to hospitalized patients or the like because the PS of the first synthesized light is 80 or more.

  The light source module 10 preferably has an average color rendering index Ra of the first combined light of at least 85. Thereby, since the average color rendering index Ra of the first synthesized light is 85 or more, the light source module 10 has a high color rendering property of the first synthesized light, thereby making the color appearance of various objects natural colors. Is possible. Therefore, the light source module 10 can provide an illumination environment that does not give a sense of incongruity to residents in elderly welfare facilities, hospitalized patients in hospital rooms, and the like. The average color rendering index Ra is a value obtained according to a calculation procedure defined in JIS Z8726-1990, for example.

The light source module 10 preferably has a value (D _UV = 1000 d _uv ) obtained by multiplying the deviation (d _uv ) of the chromaticity coordinates of the first synthesized light by 1000 (D _UV = 1000 d _uv ) in the range of −5 to +2. .

D _UV is defined in JIS Z8725-1999. D _UV is a value (D _UV = 1000 d _UV ) obtained by multiplying d _UV which is a value expressed by the following equation (3) with respect to the deviation from the black body radiation locus of the CIE 1960 UCS chromaticity coordinates. d _UV and D _UV take a positive value when the chromaticity coordinate of the light source (here, the light source module 10) is on the upper side of the black body radiation locus, and take a negative value when the chromaticity coordinate is on the lower side.
d _UV = ± {(u _s −u ₀ ) ² + (v _s −v ₀ ) ² } ^1/2 (3) where u _s and v _s are the CIE 1960 UCS chromaticity coordinates of the light source. . U ₀ and v ₀ are coordinates of a point on the black body radiation locus closest to the chromaticity coordinate of the light source on the CIE 1960 UCS chromaticity diagram.

The light source module 10 can suppress the bluish white light or the reddish white light by having the light color in which the D _{UV of} the first combined light is in the range of −5 to +2.

  The spectral distribution of the first synthesized light of the light source module 10 has a first peak wavelength in the range of 400 nm to 470 nm, a second peak wavelength in the range of 471 nm to 550 nm, and a first peak in the range of 551 nm to 670 nm. Preferably it has a peak wavelength of 3. Further, in the spectral distribution of the first synthesized light, the interval between the second peak wavelength and the third peak wavelength is preferably in the range of 80 nm to 120 nm. Thereby, the light source module 10 can emit white light in which blue light, blue-green light, and red light are combined as the first combined light. Therefore, the light source module 10 can enhance the color rendering of white light as compared with the light source module of the comparative example in which the gallium nitride blue LED chip and the yellow phosphor are combined. In short, the light source module 10 can emit white light close to natural light as the first combined light as compared with the light source module of the comparative example. The light source module 10 has a DIN of 0.85 or more by appropriately setting the first peak wavelength, the second peak wavelength, and the third peak wavelength, and the relative ratio of the intensity at each peak wavelength. In addition, the first synthesized light having a correlated color temperature of 5000 K to 7100 K and a PS of 60 or more can be emitted.

  In the first light emitting device 1, the first wavelength conversion material preferably contains a blue-green phosphor having a peak wavelength in the range of 471 nm to 550 nm. The blue-green phosphor is a phosphor that can be excited by the blue light emitted from the first solid-state light emitting element 11 to emit blue-green light. In the second light emitting device 2, the second wavelength conversion material preferably includes a yellow-green phosphor having a peak wavelength in the range of 551 nm to 600 nm and a red phosphor having a peak wavelength in the range of 551 nm to 670 nm. . The yellow-green phosphor is a phosphor that can be excited by the blue light emitted from the second solid state light emitting element 21 to emit yellow-green light. The red phosphor is a phosphor that can be excited by blue light emitted from the second solid-state light emitting element 21 to emit red light. In the 3rd light-emitting device 3, it is preferable that a 3rd wavelength conversion material contains the red fluorescent substance which has a peak wavelength in the range of 630 nm-670 nm. The red phosphor is a phosphor that can be excited by the blue light emitted from the third solid-state light emitting element 31 to emit red light. Therefore, the light source module 10 can improve the color rendering property of white light.

As the blue-green phosphor of the first wavelength conversion material, for example, a halosilicate phosphor can be used. As the halosilicate phosphor, for example, (Ca, Eu) ₈ Mg (SiO ₄ ) ₄ Cl ₂ activated with Eu can be used. As the yellow-green phosphor of the second wavelength conversion material, for example, YAG (Yttrium Aluminum Garnet) activated with Ce can be used. As the red phosphor of the second wavelength conversion material, for example, (Ca, Sr) AlSiN ₃ activated by Eu (generally called “SCASN”) or the like can be used. As the red phosphor of the third wavelength conversion material, for example, CaAlSiN ₃ activated by Eu (generally called “CASN”) or the like can be used.

  As described above, in the light source module 10, the DIN of the second combined light is 0.25 or less. As the DIN of the second synthetic light is smaller, the light source module 10 can suppress the melatonin secretion of a person in the illumination space illuminated by the second synthetic light from being hindered. As the person in the lighting space, for example, a resident of an elderly welfare facility or a hospital inpatient is assumed.

  In the light source module 10, the correlated color temperature of the second synthesized light is 2000K or more and 3250K or less. 3250K is the upper limit of the correlated color temperature of the light bulb color defined by JIS Z9112: 2004 or the like. 2000K is not defined in JIS Z8113: 1998 or IEC 60050-845, but the color temperature of the candle is about 2000K.

  In the light source module 10, it is preferable that the correlated color temperature of the second combined light is 2000K or more and 2500K or less. Thereby, the light source module 10 can lower the upper limit value of the DIN of the second combined light. Although 2500K is not defined in JIS Z8113: 1998 or IEC 60050-845, the color temperature of sunset is about 2500K. The lower limit of the correlated color temperature of the light bulb color defined in JIS Z9112: 2004 is 2600K.

  The light source module 10 preferably has a skin color preference index (PS) calculated from the spectral distribution of the second combined light of 80 or more. Thereby, the light source module 10 adjusts the circadian rhythm by suppressing the melatonin secretion of residents and hospitalized patients if the second synthesized light is mainly illumination light from the evening to the night before the turn-off time, In addition, it is possible to produce an environment where the skin color is good.

  The light source module 10 preferably has an average color rendering index Ra of the second combined light of at least 80. Since the light source module 10 has an average color rendering index Ra of the second combined light of 80 or more, the color rendering property of the second combined light is high, so that the color appearance of various objects can be made natural. Become. Therefore, the light source module 10 can provide an illumination environment that does not give a sense of incongruity to residents in elderly welfare facilities, hospitalized patients in hospital rooms, and the like.

The light source module 10 preferably has a value (D _UV = 1000 d _uv ) obtained by multiplying the deviation (d _uv ) of the chromaticity coordinates of the second synthesized light by 1000 (D _UV = 1000 d _uv ) in the range of −5 to +2. .

The light source module 10 can suppress the bluish white light or the reddish white light by having the light color in which the D _{UV of} the second combined light is in the range of −5 to +2.

  The spectral distribution of the second synthesized light of the light source module 10 preferably has a first peak wavelength in the range of 400 nm to 470 nm and a second peak wavelength in the range of 551 nm to 670 nm. Accordingly, the light source module 10 appropriately sets the first peak wavelength and the second peak wavelength and the relative ratio of the intensity at each peak wavelength, whereby the DIN is 0.25 or less and the correlation It is possible to configure to emit the second synthesized light having a color temperature of 2000K to 3250K.

  FIG. 5 described above shows the spectral distribution of the first combined light in one embodiment of the light source module 10. FIG. 6 described above shows the spectral distribution of the second combined light in the above embodiment of the light source module 10. In the above embodiment, blue LED chips having a peak wavelength of 450 nm were used as the first solid state light emitting device 11, the second solid state light emitting device 21, and the third solid state light emitting device 31. In the above embodiment, a blue-green phosphor having a peak wavelength of 512 nm is used as the first wavelength conversion material. In the above embodiment, the second wavelength conversion material is a yellow-green phosphor having a peak wavelength of 543 nm and a red phosphor having a peak wavelength of 630 nm. In the above embodiment, a red phosphor having a peak wavelength of 650 nm is used as the third wavelength conversion material.

  In the light source module 10 of the above-described embodiment, the intensity of the second peak wavelength is lower than the intensity of the first peak wavelength in the spectral distribution of the first synthesized light, and the third peak is higher than the intensity of the second peak wavelength. The wavelength intensity is low. Further, the light source module 10 of the above-described embodiment is configured such that the intensity of the second peak wavelength is higher than the intensity of the first peak wavelength in the spectral distribution of the second synthesized light.

  Table 1 below summarizes the configuration and characteristics of the light source module 10 of one embodiment.

  The light source module 10 can be used, for example, in a room of a resident of an elderly welfare facility or a hospital room of a hospital inpatient. In this case, the light source module 10 is more suitable for adjusting the circadian rhythm by, for example, emitting first synthetic light that suppresses melatonin secretion from wake-up to daytime for residents and hospitalized patients. Environment can be provided. In addition, the light source module 10 emits the second synthetic light from the evening to the night before the turn-off time, thereby preventing the melatonin secretion of residents and hospitalized patients from being disturbed and adjusting the circadian rhythm. It is possible to produce an environment with good color appearance. The light source module 10 can prevent the melatonin secretion from being hindered by reducing the intensity of the blue light on the short wavelength side in the visible light region in the spectral distribution of the second synthesized light.

  As can be seen from the above description, the light source module 10 can obtain desired first combined light by the combination of the first light emitting device 1 and the second light emitting device 2, and the second light emitting device 2 and the third light emitting device. The desired second synthesized light can be obtained in combination with 3. For this reason, the light source module 10 can achieve cost reduction as compared with a case where a dedicated light source module is manufactured using the desired first combined light and the desired second combined light.

  The light source module 10 only needs to include the first light emitting device 1, the second light emitting device 2, and the third light emitting device 3. For example, the light source module 10 further includes a fourth light emitting device (not shown) having an emission spectrum different from these. It may be. In short, the light source module 10 includes a plurality of light emitting devices having different emission spectra, and a desired first combined light and a desired second combined light by combining two or more light emitting devices among the plurality of light emitting devices. It suffices if it is configured so that it can be obtained.

(Embodiment 2)
Below, the illuminating device 5 of this embodiment is demonstrated based on FIG. In addition, about the component similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The lighting device 5 includes a plurality of light source modules 10. The lighting device 5 includes a control unit 54 that controls power supplied from the power supply 53 to the plurality of light source modules 10. Furthermore, the lighting device 5 includes a time setting unit 55 that sets time, a storage unit 56 that stores a time schedule that defines the relationship between the time set by the time setting unit 55 and the control content in the control unit 54, and the time And a clock unit 57 that counts time. The time set by the time setting unit 55 includes a wake-up time and a bedtime. Based on the current time measured by the clock unit 57 and the time schedule stored in the storage unit 56, the control unit 54 starts from a time that is a predetermined time before the wake-up time set by the time setting unit 55. During the evening, the plurality of light source modules 10 are turned on so that the first combined light is mainly emitted. Further, the control unit 54 mainly uses the second time from the evening to the bedtime set by the time setting unit 55 based on the current time measured by the clock unit 57 and the time schedule stored in the storage unit 56. The plurality of light source modules 10 are turned on so that the combined light is emitted. Thereby, the illuminating device 5 can achieve both the biological action effect of adjusting the circadian rhythm and the good appearance of the skin. In short, the illumination device 5 can provide a more suitable environment for adjusting the circadian rhythm of the human body. The lighting device 5 can provide a more suitable environment for adjusting the circadian rhythm of residents of elderly welfare facilities and hospital inpatients, for example.

  Each component of the illuminating device 5 is demonstrated in detail below.

  The illumination device 5 is configured so that light is emitted by an appropriate combination of the first light emitting device 1, the second light emitting device 2, and the third light emitting device 3 of the light source module 10.

  In the illumination device 5, the control unit 54 adjusts the output of each of the first light emitting device 1, the second light emitting device 2, and the third light emitting device 3 in each of the plurality of light source modules 10, so that the light color and the correlated color are adjusted. The temperature can be adjusted.

  In the illumination device 5, when each light source module 10 is the above-described embodiment, the chromaticity locus of the third synthesized light obtained by synthesizing the first synthesized light and the second synthesized light is indicated by a dashed line in FIG. 9. It is possible to change on L2. FIG. 9 shows the chromaticity point of the first combined light as P1 and the chromaticity point of the second combined light as P2 on the xy chromaticity diagram, and a straight line connecting the chromaticity point P1 and the chromaticity point P2. Is shown as a chromaticity locus L2. Further, the curve indicated by L1 in FIG. 9 indicates a black body locus.

  10, 11 and 12 show the spectral distributions when the correlated color temperatures are 5002K, 3990K and 2999K, respectively. 10 to 12 that the relative intensity of the peak at 630 nm with respect to the peak at 450 nm increases as the correlated color temperature decreases. The 450 nm peak is derived from the blue light emitted from the blue LED chip. The peak at 630 nm is derived from red light emitted from the red phosphor.

  Table 2 below summarizes characteristic examples of the third synthesized light obtained by synthesizing the first synthesized light and the second synthesized light.

  From Table 2, it can be seen that even in the intermediate color between the light color of the first synthesized light and the light color of the second synthesized light, a high value can be realized for each of the PS and the average color rendering index Ra.

  The power supply 53 can be configured by a power supply circuit such as an AC-DC converter that converts an AC voltage from an AC power supply into a predetermined DC voltage and outputs the same.

  The controller 54 includes, for example, a first to third switching elements (not shown) and a PWM control circuit that performs PWM (Pulse Width Modulation) control on / off of the first to third switching elements. can do. The first switching element is connected in series to each first light emitting device 1. The second switching element is connected in series to each second light emitting device 2. The third switching element is connected in series to each third light emitting device 3. Each switching element can be composed of, for example, a semiconductor switch element. As the semiconductor switch element, for example, a metal oxide semiconductor field effect transistor (MOSFET) or a bipolar transistor can be employed. The PWM control circuit can be configured by, for example, a microcomputer equipped with an appropriate program.

  The time setting unit 55 includes an operation unit for a person (for example, an inpatient, an inpatient's family, a nurse, etc.) to set various times, and outputs the time according to the input of the operation unit to the control unit 54. To do.

  For example, a touch panel, a rotary switch, or the like can be used as the operation unit, but the operation unit is not limited thereto.

  The storage unit 56 can be configured by a memory that can be electrically written and erased. The memory is preferably a nonvolatile memory. The storage unit 56 can exchange various types of information with the control unit 54. The storage unit 56 stores a time schedule in which time is associated with the control content of each light source module 10. When the wake-up time is set by the time setting unit 55, the control unit 54 turns on the light source module 10 at a time that is a predetermined time (hereinafter also referred to as “first predetermined time”) before the wake-up time. The start time is stored in the storage unit 56. In addition, when the bedtime is set by the time setting unit 55, the control unit 54 sets the time after the bedtime by a predetermined time (hereinafter also referred to as “second predetermined time”) as the light source module 10. Is stored as the extinguishing time.

  The clock unit 57 can be configured by, for example, an atomic clock (cesium clock), a radio clock, or the like. In the above-described microcomputer, the clock unit 57 may measure the time according to the oscillation signal output from the crystal oscillator.

  FIG. 13 is an explanatory diagram illustrating an example of the operation of the lighting device 5. In FIG. 13, the upper part is a time chart of the output of the first combined light, and the lower part is a time chart of the output of the second combined light.

  In FIG. 13, the wake-up time is t1, the lighting start time is t0, and the bedtime is t4. In FIG. 13, noon is t2, evening is t3, and the turn-off time is t5. For the evening t3, the storage unit 56 stores the sunset time of each day of the year as the evening. The first predetermined time is 5 minutes, but is not particularly limited. The second predetermined time is 10 minutes, but is not particularly limited. The time set by the time setting unit 55 is not limited to the wake-up time and bedtime.

  As shown in FIG. 13, the illuminating device 5 emits the first synthesized light from the first light source module 10 in the morning and emits the third synthesized light obtained by synthesizing the first synthesized light and the second synthesized light in the afternoon. The second synthesized light is emitted at night. The lighting device 5 gradually increases (fades in) the output when turning on the first combined light and the second combined light, and gradually decreases (fades out) when turning off the light. ).

  In the illumination device 5, the combined light (third combined light) of the first combined light and the second combined light is white light. This white light has a correlated color temperature of 2000 K or more and 7100 K or less, a skin color preference index (PS) calculated from the spectral distribution of the white light is at least 60, and an average color rendering index Ra is at least 85. It is preferable that Thereby, the illuminating device 5 can achieve both the biological action effect of adjusting the circadian rhythm and the good color appearance of the skin.

More preferably, the illumination device 5 has a PS of at least 80 for the white light. Thus, the illumination device 5, with respect to hospitalized patients and the like, it is possible to show preferable skin colors, or better than, the light of a standard light source D _65.

In the illumination device 5, it is preferable that one of the first combined light D _uv and the second combined light D _uv has a positive value and the other has a negative value. Thereby, the illuminating device 5 can narrow the range of D _uv regarding the third combined light.

  Since the illuminating device 5 includes a plurality of light source modules 10, dedicated light source modules are used for each of the desired first combined light and the desired second combined light, and each of the dedicated light source modules is provided. Compared to the case, the cost can be reduced.

  Each figure described in the above-described first and second embodiments is schematic, and the ratio of the size and thickness of each component does not necessarily reflect the actual dimensional ratio. . In addition, the materials, numerical values, and the like described in the first and second embodiments are merely preferable examples and are not limited thereto. Furthermore, the present invention can be appropriately modified in configuration without departing from the scope of its technical idea.

DESCRIPTION OF SYMBOLS 1 1st light-emitting device 2 2nd light-emitting device 3 3rd light-emitting device 5 Illumination device 10 Light source module 11 1st solid light emitting element 12 1st wavelength conversion part 13 Mounting substrate 21 2nd solid-state light emitting element 22 2nd wavelength conversion part 31 1st 3 Solid-state light emitting device 32 3rd wavelength conversion part 53 Power supply 54 Control part 55 Time setting part 56 Storage part 57 Clock part

Claims (18)

A first light-emitting device, a second light-emitting device, and a third light-emitting device having different emission spectra,
The first light emitting device includes a first solid-state light emitting element, and a first wavelength including a first wavelength conversion material that converts a part of light emitted from the first solid-state light emitting element to emit light having a different wavelength. A conversion unit,
The second light-emitting device includes a second solid-state light-emitting element and a second wavelength-converting material that converts a part of light emitted from the second solid-state light-emitting element to emit light having a different wavelength. A conversion unit,
The third light emitting device includes a third solid-state light emitting element, and a third wavelength including a third wavelength conversion material that converts a part of light emitted from the third solid-state light emitting element to emit light having a different wavelength. A conversion unit,
The melatonin secretion suppression effect calculated by the following formula (1) from the spectral distribution of the first synthesized light obtained by synthesizing the light emitted from the first light emitting device and the light emitted from the second light emitting device is shown. The bioactivity (DIN) is at least 0.85;
The correlated color temperature of the first synthesized light is 5000K or more and 7100K or less,
The skin color preference index (PS) calculated from the spectral distribution of the first synthesized light is at least 60;
The melatonin secretion suppression effect calculated by the following formula (1) from the spectral distribution of the second synthesized light obtained by synthesizing the light emitted from the second light emitting device and the light emitted from the third light emitting device is shown. The bioactivity (DIN) is 0.25 or less,
The correlated color temperature of the second synthesized light is 2000K or more and 3250K or less,

Here, S (λ) is a spectral distribution of the first synthetic light or the second synthetic light, A (λ) is an action function for suppressing melatonin secretion, and V (λ) is relative luminous sensitivity.
A light source module.   2. The light source module according to claim 1, wherein a correlated color temperature of the first combined light is 6000 K or more and 7100 K or less.   3. The light source module according to claim 1, wherein the PS of the first combined light is at least 80. 4.   4. The light source module according to claim 1, wherein an average color rendering index Ra of the first combined light is at least 85. 5. The value (D _UV = 1000 d _uv ) obtained by multiplying the deviation (d _uv ) of the chromaticity coordinates of the first synthesized light by 1000 (D _UV = 1000 d _uv ) is in the range of −5 to +2. The light source module according to any one of 1 to 4. The spectral distribution of the first synthesized light has a first peak wavelength in the range of 400 nm to 470 nm, a second peak wavelength in the range of 471 nm to 550 nm, and a third peak in the range of 551 nm to 670 nm. Has a wavelength,
The light source module according to claim 1, wherein an interval between the second peak wavelength and the third peak wavelength is in a range of 80 nm to 120 nm.   7. The light source module according to claim 1, wherein a correlated color temperature of the second synthesized light is 2000 K or more and 2500 K or less.   The light source module according to any one of claims 1 to 7, wherein a skin color preference index (PS) calculated from a spectral distribution of the second synthesized light is at least 80.   9. The light source module according to claim 1, wherein an average color rendering index Ra of the second synthesized light is at least 80. 10. Claim wherein the deviation (d _uv) 1000 times the value of the blackbody radiation locus in the chromaticity coordinates of the second composite light (D _UV = 1000d _uv), characterized in that in the range of -5 +2 The light source module according to any one of 1 to 9.   11. The spectral distribution of the second synthesized light has a first peak wavelength in a range of 400 nm to 470 nm and a second peak wavelength in a range of 551 nm to 670 nm. The light source module according to claim 1. The first wavelength conversion unit is formed of a mixture of the first wavelength conversion material and a first light-transmissive material that transmits visible light, and covers the first solid-state light-emitting element.
The second wavelength conversion unit is formed of a mixture of the second wavelength conversion material and a second light-transmissive material that transmits visible light, and covers the second solid-state light emitting element.
The third wavelength conversion unit is formed of a mixture of the third wavelength conversion material and a third light-transmissive material that transmits visible light, and covers the second solid-state light emitting element.
The light source module according to claim 1, wherein the light source module is a light source module.   13. The light emitting diode according to claim 1, wherein each of the first solid light emitting element, the second solid light emitting element, and the third solid light emitting element is a light emitting diode having a peak wavelength in a range of 400 nm to 470 nm. The light source module according to item. The first wavelength conversion material includes a blue-green phosphor having a peak wavelength in a range of 471 nm to 550 nm,
The second wavelength conversion material includes a yellow-green phosphor having a peak wavelength in the range of 551 nm to 600 nm, and a red phosphor having a peak wavelength in the range of 551 nm to 670 nm,
The light source module according to claim 1, wherein the third wavelength conversion material includes a red phosphor having a peak wavelength in a range of 630 nm to 670 nm. A plurality of light source modules according to any one of claims 1 to 14,
A control unit that controls power supplied from the power source to the plurality of light source modules, a time setting unit that sets time, and a relationship between the time set by the time setting unit and the control content in the control unit are defined. A storage unit for storing a time schedule, and a clock unit for measuring time,
The time set by the time setting unit includes a wake-up time and a bedtime,
Based on the current time measured by the clock unit and the time schedule stored in the storage unit, the control unit starts from a time that is a predetermined time before the wake-up time set by the time setting unit. The plurality of light source modules are turned on so that the first synthesized light is emitted mainly during the evening, and the second synthesized light is emitted mainly from the evening until the bedtime set by the time setting unit. The lighting device is characterized in that the plurality of light source modules are turned on. The combined light of the first combined light and the second combined light is white light,
The white light has a correlated color temperature of 2000 K to 7100 K, a skin color preference index (PS) calculated from the spectral distribution of the white light is at least 60, and an average color rendering index Ra is at least 85. The lighting device according to claim 15, wherein:   The illumination device according to claim 16, wherein the PS of the white light is at least 80. 18. One of the first combined light D _uv and the second combined light D _uv is a positive value and the other is a negative value. 18. Lighting device.

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