WO2022208922A1 - 発光モジュール、及び、照明装置 - Google Patents
発光モジュール、及び、照明装置 Download PDFInfo
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- WO2022208922A1 WO2022208922A1 PCT/JP2021/028507 JP2021028507W WO2022208922A1 WO 2022208922 A1 WO2022208922 A1 WO 2022208922A1 JP 2021028507 W JP2021028507 W JP 2021028507W WO 2022208922 A1 WO2022208922 A1 WO 2022208922A1
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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]
- H05B45/20—Controlling the colour of the light
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/65—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction specially adapted for changing the characteristics or the distribution of the light, e.g. by adjustment of parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/68—Details of reflectors forming part of the light source
-
- 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
-
- 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
- H05B45/28—Controlling the colour of the light using temperature feedback
-
- 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
- F21Y2105/00—Planar light sources
- F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
- F21Y2105/12—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
-
- 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
- F21Y2113/10—Combination of light sources of different colours
- F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources
- F21Y2113/17—Combination of light sources of different colours comprising an assembly of point-like light sources forming a single encapsulated light source
-
- 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
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the present invention relates to light-emitting modules and lighting devices.
- a high color rendering index is obtained only in a relatively low and narrow correlated color temperature range of 2000K to 3200K.
- a relatively high correlated color temperature of 3500K or higher there is no disclosure of a relatively high correlated color temperature of 3500K or higher. Therefore, a light-emitting module is desired that can output light having a high color rendering property at a relatively high correlated color temperature or in a wider correlated color temperature range.
- the present invention has been made in view of the above-mentioned actual situation, and an object of the present invention is to provide a light-emitting module that emits light having higher color rendering properties, and a lighting device.
- the light-emitting module of the present invention comprises: a first light source emitting light having a first correlated color temperature; a second light source that emits light having a second correlated color temperature higher than the first correlated color temperature; five types of colored light sources capable of emitting light of different emission colors; with By causing the first light source, the second light source, and the five kinds of colored light sources to emit light at a predetermined ratio of emission intensity, the general color rendering index Ra is 98 or more at a correlated color temperature of 5000 K or more and 6500 K or less, Mixed light with a special color rendering index R9 of 98 or higher and a special color rendering index R12 of 94 or higher can be emitted.
- the first correlated color temperature may be 2700K.
- the second correlated color temperature may be 5700K.
- the first light source may be an incandescent light source
- the second light source may be a white light source
- the five colored light sources may include a red light source, a blue light source, a purple light source, and a cyan light source. good.
- the first light source, the second light source, and the five types of colored light sources By causing the first light source, the second light source, and the five types of colored light sources to emit light at a predetermined ratio of emission intensity, the general color rendering index Ra and the special color rendering evaluation at a correlated color temperature of 5000 K or more and 6500 K or less It may be possible to emit mixed light with a number R9 of 99.
- Each of the first light source, the second light source, and the lime-colored light source emits light with an emission intensity sufficiently higher than the sum of the emission intensities of the light sources other than the lime-colored light source among the five kinds of colored light sources.
- Mixed light with a correlated color temperature of 5000K or more and 6500K or less may be emitted.
- the correlated color temperature of the emitted light of the first light source is 2700 K
- the correlated color temperature of the emitted light of the second light source is 5700 K
- the five colored light sources are a third light source emitting purple light
- a fourth light source emitting blue light, a fifth light source emitting cyan light, a sixth light source emitting lime light, and a seventh light source emitting red light may be included.
- light with a correlated color temperature of 2700K is synthesized by causing the first to seventh light sources to emit light at a luminous flux ratio of 24000:0:0:0:0:0, or 22000: Synthesize light with a correlated color temperature of 3000K by emitting light with a luminous flux ratio of 0:4.6:220:110:2750:0, or Synthesize light with a correlated color temperature of 3500K by emitting light at a luminous flux ratio of 20000:4600:10.9:330:530:4000:0, or Synthesize light with a correlated color temperature of 4000K by emitting light with a luminous flux ratio of 19000:11400:19.3:530:760:5300:0, or Synthesize light with a correlated color temperature of 5000K by emitting light with a luminous flux ratio of 14800:14700:88:1050:1740:9590:87, or Synthesize light with a correlated color temperature of 5
- dimming control means capable of dimming the first light source, the second light source, and the five colored light sources with a predetermined level of resolution
- the dimming control means may perform dimming by combining FM (Frequency Modulation) dimming, PWM (Pulse Width Modulation) dimming, and DC (Direct Current) dimming.
- a plurality of the first light sources and a plurality of the second light sources may be arranged radially in a direction from the vicinity of the center of the circular substrate toward the circumference thereof.
- the lighting device of the present invention is A lighting device comprising the light emitting module, further comprising a control device for controlling dimming control means for dimming the first light source, the second light source, and the five colored light sources
- the control device includes a storage unit that stores in advance a table showing the relationship between the emission intensity of the first light source, the second light source, and the five kinds of colored light sources and the correlated color temperature, and the storage unit stores: Referencing the stored table to determine emission intensities of the first light source, the second light source, and the five colored light sources corresponding to the desired correlated color temperature, and determining the emission intensities.
- the light adjustment control means may be controlled based on.
- the lighting device a reflecting part having a reflecting surface perpendicular to an arrangement plane of the first light source, the second light source, and the five kinds of colored light sources of the light emitting module and reflecting light emitted from the light emitting module;
- a diffusion plate may be provided on a side of the reflection section opposite to the light emitting module and diffuse the light reflected by the reflection section.
- the lighting device a lens that extends substantially parallel to an arrangement plane of the first light source, the second light source, and the five kinds of colored light sources of the light emitting module and converges or diverges the light emitted from the light emitting module; and a lens diffuser plate that extends substantially parallel to the lens and diffuses and shapes light passing through the lens.
- FIG. 2 is a plan view showing a configuration example of a light-emitting module according to Embodiment 1.
- FIG. It is a figure which shows an example of LED (light source) which comprises a light emitting module. It is a block diagram which shows an example of a structure of a light emitting module. 4 is a diagram showing the relationship between the output current of an LED driver and the gradation of an LED; FIG. It is a figure which shows the duty ratio etc. in PWM dimming. It is a figure which shows the color rendering properties etc. by a light emitting module.
- FIG. It is a figure which shows an example of LED (light source) which comprises a light emitting module.
- It is a block diagram which shows an example of a structure of a light emitting module.
- 4 is a diagram showing the relationship between the output current of an LED driver and the gradation of an LED;
- FIG. It is a figure which shows the duty ratio etc. in PWM dimming. It is a figure which
- FIG. 4 is a diagram showing spectrum waveforms of light from a light emitting module
- 1 is a configuration diagram of a spotlight illumination device to which a light emitting module according to Embodiment 1 is applied
- FIG. FIG. 4 is a diagram showing another example of LEDs (light sources) that constitute the light emitting module
- FIG. 10 is a configuration diagram of a spotlight illumination device to which the light-emitting module according to Embodiment 2 is applied;
- Embodiment 1 A light-emitting module according to Embodiment 1 of the present invention will be described below with reference to the drawings.
- FIG. 1 is a plan view showing a configuration example of a light emitting module 1 according to this embodiment. As shown in FIG. 1, the light-emitting module 1 includes a substrate 10 and a plurality of LEDs (Light Emitting Diodes) 21-27.
- LEDs Light Emitting Diodes
- the substrate 10 is, for example, an LED substrate for installing a chip-type LED by soldering or the like.
- the substrate 10 is formed by coating the surface of a metal plate such as copper with an insulating material and forming a wiring pattern on the coating layer.
- the substrate 10 is provided with input/output terminals for electrically connecting the installed LEDs to a power source and an LED driver.
- the substrate 10 of this embodiment is configured in a circular shape as shown in FIG. 1 and has three regions 10A, 10B, and 10C divided into three.
- FIG. 1 shows that the LEDs 21 to 27 are installed only in the area 10A, the LEDs 21 to 27 are arranged in the same arrangement in the areas 10B and 10C. That is, in the light emitting module 1, all the LEDs 21 to 27 installed in the regions 10A, 10B, and 10C of the substrate 10 are used to generate combined light and emit light.
- the configuration of the light emitting module 1 and the substrate 10 shown in FIG. 1 is an example.
- the present invention is not limited to this embodiment, as long as a desired type and number of light-emitting elements such as LEDs can be arranged in order to function as a light source that emits light of a desired color and luminance (luminous flux).
- the substrate 10 may be provided with other structures such as a heat dissipation mechanism for heat dissipation.
- the LEDs 21 to 27 include a plurality of first-color LEDs 21 serving as a first light source for emitting light having a first correlated color temperature (for example, incandescent light), and a second LED having a higher correlated color temperature than the first correlated color temperature.
- a plurality of sixth color LEDs 26 and a plurality of seventh color LEDs 27 are included.
- a third color LED 23, a fourth color LED 24, a fifth color LED 25, a sixth color LED 26, and a seventh color LED 27 are color LEDs capable of emitting different colors, and function as five types of colored light sources.
- the first color LED 21, second color LED 22, third color LED 23, fourth color LED 24, fifth color LED 25, sixth color LED 26, and seventh color LED 27 are simply referred to as LED 21, LED 22, and LED 23. , LED24, LED25, LED26, and LED27.
- FIG. 2 is a diagram showing an example of the LEDs 21-27.
- the LED 21 of this embodiment is composed of a bulb-colored LED. More specifically, the LED 21 has, for example, a correlated color temperature of 2700 K (Kelvin), and a chromaticity coordinate (median value) of (0.4578, 0.4101), which can emit incandescent light.
- LED22 is comprised from white LED. More specifically, the LED 22 can emit light with a correlated color temperature of 5700 K (Kelvin) and chromaticity coordinates (median values) in CIE1931 of (0.3287, 0.3417), for example.
- the correlated color temperature is the temperature represented by the color (temperature) of black body radiation that appears to be the closest color to the light source color.
- the unit of correlated color temperature is Kelvin (K).
- the correlated color temperature is a measure of the light color of a light source (bluish, reddish, etc.), and is a value indicated by the color (temperature) of blackbody radiation that appears to be the closest color to the light source.
- the LED 23 has a peak wavelength ⁇ p in the range of 420 nm to 430 nm and can emit purple (VLT) light.
- the LED 24 has a dominant wavelength ⁇ d in the range of 475 nm to 480 nm, and can emit blue (BLU) light.
- the LED 25 has a dominant wavelength ⁇ d in the range of 496 nm to 500 nm, and can emit cyan (CYN) light.
- the LED 26 can emit, for example, lime green (LME) light with chromaticity coordinates (median values) in CIE1931 of (0.4140, 0.5430).
- the LED 27 has a dominant wavelength ⁇ d in the range of 624 nm to 634 nm, and can emit red (RED) light.
- LEDs shown in FIG. 2 are just an example, and the present invention is not limited to this, and LEDs having substantially the same characteristics or within an error range may be employed.
- LEDs with different peak wavelengths and dominant wavelengths may be employed as long as they are of the same color.
- the width of the band of emitted light may be different.
- a correlated color temperature of 2700K includes a predetermined error range (eg, 2%) of 2646K to 2754K. The same applies to each numerical value in this embodiment.
- FIG. 3 is a block diagram showing an example of the configuration of the light emitting module 1.
- a plurality of LEDs 21 are connected to each other in series and connected to an LED driver 30 .
- the LED driver 30 is configured by a circuit for lighting the LEDs 21 with a predetermined luminous flux (luminance), and supplies current to the plurality of LEDs 21 connected in series.
- FIG. 3 shows an example in which the LED driver 30 is connected to the LED 21, the LED driver 30 is provided for each of the LEDs 21 to 27 of each color.
- the LED drivers 30 are connected to a controller 40 that controls their respective output currents.
- the LED driver 30 can illuminate the LEDs 21 to 27 of each color with a desired luminous flux with a predetermined level of resolution (for example, 8192 levels). That is, the LED driver 30 is capable of adjusting the brightness of each of the LEDs 21 to 27 of each color to a desired brightness with a predetermined level of resolution.
- a predetermined level of resolution for example, 8192 levels.
- the LED driver 30 of this embodiment combines PWM (Pulse Width Modulation) dimming for dimming and DC (Direct Current) dimming for dimming by increasing/decreasing current. Light is supposed to do.
- PWM Pulse Width Modulation
- DC Direct Current
- FIG. 4 is a diagram showing the relationship between the output current of one LED driver 30 and the gradation of the LED.
- the LED driver 30 controls the LED by PWM dimming that changes the output frequency and duty ratio of the pulse wave while keeping the output current constant at 0 to 1023 gradations (1024 steps) of low luminance. dimming. Then, the LED driver 30 performs dimming of the LEDs by DC dimming that increases or decreases the level of the output current in the 1024th to 8191st gradations.
- the LED driver 30 of this embodiment is capable of dimming LEDs with a resolution of 8192 steps (13 bits) in total by combining PWM dimming and DC dimming.
- the LED driver 30 of this embodiment employs PWM dimming for low-luminance gradations below the standard, thereby realizing fine dimming, and for high-luminance gradations above a predetermined level, DC By adopting dimming, flickering due to blinking can be prevented.
- the MAX value of the current level and the value of the constant current during PWM in FIG. 4 are determined by the characteristics of the LED to be controlled.
- FIG. 5 is a diagram showing the duty ratio and the like in PWM dimming at low luminance.
- the resolution of PWM dimming is a resolution of 1024 steps (10 bits).
- the dimming period of one dimming signal output from the control device 40 is 2000 ⁇ s, and eight PWM pulse waves are generated in one period of 2000 ⁇ s.
- the duty ratio range of each pulse is 0/128 to 128/128.
- the duty ratio of each pulse in each gradation and the total value of the pulse width are as shown in FIG. The larger the total pulse width, the higher the brightness of the LED.
- pulse waves are thinned out by providing a period with a duty ratio of 0.
- the number of pulses output during one period of 2000 ⁇ s varies from 0 to 8
- the frequency of the PWM pulse wave varies from 0 Hz to 4 KHz. That is, 0 to 8 gradations can be said to be FM (Frequency Modulation) dimming by frequency modulation.
- the LED driver 30 of this embodiment can suitably dim the LEDs by combining FM dimming, PWM dimming, and DC dimming.
- the dimming signal of the LED driver 30 is composed of 13 bits. can be illuminated with a brightness of
- the number of LEDs connected to the LED driver 30 may be arbitrary, and is not limited to being connected in series, and may be connected in a combination of series and parallel. Further, the LED driver 30 is not limited to the one in this embodiment, and may be capable of lighting the respective color LEDs 21 to 27 with a predetermined resolution, and the LEDs may be lit by either PWM dimming or DC dimming. It may be the one that allows the control to be performed, or the other control method may be adopted. Also, the resolution of the LED driver 30 is not limited to 8192 (13 bits) steps, and the gradation for switching from PWM dimming to DC dimming can be arbitrarily changed. Further, the duty ratio shown in FIG. 5 can also be changed, and for example, the total pulse width only needs to correspond to the gradation value.
- FIG. 6 is a diagram showing measurement results of luminous flux (luminance), total luminous flux, and color rendering properties (Ra, R9, R12, TLCI) of each LED when the light-emitting module 1 emits light at a correlated color temperature of 2000K to 20000K. is.
- Ra average of rendering index
- CIE CIE
- R9 and R12 are special color rendering indices defined by CIE, and indicate color rendering indices using color charts of R9 and R12 test colors, respectively.
- TLCI Provision Lighting Consistency Index
- Each of these evaluation numbers is an index of color rendering properties, and can be measured by a dedicated measuring instrument or the like. The value of each index ranges from 0 to 100, with 100 indicating the highest color rendering.
- FIG. 6 is an example in which the LEDs shown in FIG. 2 are used as the LEDs 21-27.
- the luminous flux of each LED is a value adjusted to match the waveform of a CIE standard light source with Ra of 100 (D50, D55, D65, etc.).
- the LEDs 21-27 emit light with the intensity (luminous flux) shown in FIG. Ra and R9 of 98 or more (99), R12 of 94 or more, and TLCI of 99 or more can be achieved (combined light can be emitted).
- the ratio of the emission intensity when Ra and R9 are 98 or more (99) and R12 is 94 or more at a correlated color temperature of 5000 to 6500 K is LED 21 at 2700 K, LED 22 at 5600 K, and lime color
- the luminous intensity of each of the LEDs was a sufficiently higher ratio than the sum of the luminous intensities of the other four types of colored light sources.
- Ra is 98 or higher at a correlated color temperature of 3500K to 10000K (96 or higher at 2700K to 20000K, and 90 or higher at 2500K to 20000K)
- R9 is 97 or higher at a correlated color temperature of 2700K to 20000K
- a correlated color temperature of 2700K can be achieved.
- High color rendering properties such as R12 of 95 or higher at ⁇ 6500K (93 or higher at 2500K to 8000K), TLCI of 99 or higher at correlated color temperature of 3000K to 20000K (95 or higher at correlated color temperature of 2700K to 20000K, 91 or higher at correlated color temperature of 2500K to 20000K) can be achieved.
- the same color rendering can be achieved even if the total luminous flux (brightness) changes. That is, by increasing and decreasing the luminous flux of each LED while maintaining the luminous flux ratio shown in FIG. 6, it is possible to change the brightness while ensuring the same color rendering properties.
- the light-emitting module 1 of this embodiment drives the LED drivers 30 connected to the seven-color LEDs 21 to 27 under the control of the control device 40, thereby driving the seven-color LEDs at a predetermined ratio. is lit with an intensity (luminous flux, luminance) of Accordingly, the light emitting module 1 can emit synthetic light with high color rendering. Such a light-emitting module 1 can be suitably applied to a lighting device that requires good color rendering properties.
- the non-lit LEDs may be lit at a non-emphasized level.
- FIG. 7 shows a spectrum waveform when the light emitting module 1 emits light at a correlated color temperature of 5500K.
- a spectral waveform similar to the waveform D55 of the CIE standard light source can be obtained at a correlated color temperature of 5500 K, which corresponds to sunlight.
- spectral waveforms similar to waveforms D50, D65, D75, etc. can be obtained at correlated color temperatures of 5000K, 6500K, and 7500K.
- the correlated color temperature allows an error of about 6%.
- the light-emitting module 1 be used in the range of 2700K to 20000K.
- FIG. 8 is a configuration diagram of spotlight illumination device 100 according to the present embodiment.
- the spotlight illumination device 100 is composed of the light emitting module 1 described above, a heat sink (heat sink) 101 , a housing 102 and a lens 103 .
- the spotlight illumination device 100 also includes a control device 40 for controlling the correlated color temperature and brightness of the illumination light and a power source (not shown).
- a radiator (heat sink) 101 radiates heat generated in the light emitting module 1 to the outside.
- a light emitting module 1 is provided at one end of the heat radiating section 101 .
- the heat radiating section 101 is composed of, for example, a plurality of heat radiating plates containing copper or the like, heat pipes connected to the plurality of heat radiating plates, and the like.
- the housing 102 is a box-shaped member provided so as to cover the heat radiating section 101 and the light emitting module 1, and is supported by legs. An opening is provided at the end of the housing 102 on the side of the light emitting module 1 .
- the housing 102 is made of, for example, an aluminum alloy.
- the lens 103 is provided in the opening of the housing 102 and converges or diverges the light emitted from the light emitting module 1 .
- the lens 103 may be, for example, a Fresnel lens having a serrated cross section.
- the spotlight illumination device 100 may include a position adjustment mechanism for adjusting the position of the light emitting module 1 with respect to the lens 103, and a color filter for changing the color of the emitted light.
- the control device 40 includes, for example, a storage unit 40a and a processor 40b.
- the storage unit 40a stores in advance a table that associates the correlated color temperature with the intensity ratio of the LEDs 21 to 27 of the seven colors. For example, a table showing the ratio of the luminous flux of the LEDs 21 to 27 to the total luminous flux for the correlated color temperatures of 2700K, 3000K, 3500K, 4000K, 5000K, 5500K, 6500K, 8000K, 10000K, and 20000K shown in FIG. 6 is stored in the storage unit 40a. It is The storage unit 40a stores a table showing the correspondence relationship between the luminous flux and the driving method required to obtain the luminous flux for each of the LEDs 21 to 27. FIG. Specifically, the storage unit 40a stores a table in which the "grayscale" shown in FIG. A table that associates the luminous flux with the value of the DC current that flows through the series circuit of the LEDs is stored.
- the processor 40b executes control operations according to programs stored in the internal memory.
- the processor 40b captures this information when the operator manipulates control knobs or inputs the correlated color temperature and brightness (total luminous flux) of desired light from an external device.
- the processor 40b reads the ratio of the luminous flux of the LEDs 21 to 27 to the input correlated color temperature from the storage unit 40a, and multiplies the read ratio by a value corresponding to the brightness to obtain the luminance (luminous flux ).
- the processor 40b specifies a driving method for obtaining the obtained brightness of each of the LEDs 21-27.
- the processor 40b outputs a dimming signal for performing FM dimming, PWM dimming, DC dimming, etc. to the LED driver 30 based on the specified driving method.
- the LED driver 30 drives the LEDs 21 to 27 to emit light based on the dimming signal. In this manner, lighting device 100 emits combined light of desired correlated color temperature and brightness.
- control device 40 is not limited to a configuration using a processor.
- the control device 40 may be composed of a dedicated chip or the like using ASIC (application specific integrated circuit) technology.
- the spotlight lighting device 100 since the light emitting module 1 with high color rendering property is used as the light source as described above, it is possible to irradiate light close to natural light, and it is suitable for use in performance spaces such as stages and studios. can.
- the spotlight lighting device 100 may be fixed to the ceiling or wall, or may be set on a stand.
- the light-emitting module 1 is applied to the spotlight lighting device 100 as the lighting device has been described, but the lighting device is not limited to a spotlight, and is provided with the above-described light-emitting module 1 (for example, a light bulb). etc.).
- the light source is composed of LEDs, but the light source may be composed of other light-emitting elements such as laser diodes and organic EL (Electro-Luminescence).
- the light-emitting element may be any of bullet-type, surface-mounted, and chip-shaped light-emitting elements. Further, LEDs and light sources other than the LEDs 21 to 27 may be arranged on the substrate 10 depending on the application.
- FIG. 1 illustrates the case where the shape of the light emitting elements (LEDs 21 to 27) is square, the shape of the light emitting elements may be rectangular. Moreover, although the case where the size of the light emitting elements is the same (the size of the plane is the same) is illustrated, the sizes of the light emitting elements may be different. In this case, among the plurality of light emitting elements, light emitting elements having different sizes and shapes may be provided.
- FIG. 1 illustrates the case where a plurality of light emitting elements (LEDs 21 to 27) are arranged on the circular substrate 10, the shape of the substrate or the shape of the area where the plurality of light emitting elements are arranged may be changed as appropriate. can be changed.
- a plurality of light emitting elements may be arranged on a rectangular substrate or area.
- the arrangement of the light emitting elements is not limited to the example shown in FIG. 1, and a plurality of light emitting elements may be arranged in a grid, in a line, radially, or randomly.
- FIG. 9 is a diagram showing another example of the arrangement configuration of the light emitting elements (LEDs 21 to 27).
- the light-emitting module 1 shown in FIG. 9 differs from the light-emitting module 1 shown in FIG. 1 in the arrangement of the light-emitting elements on the substrate 10 .
- the substrate 10 is formed in a circular shape like the example shown in FIG. 1, and is divided into three regions 10A, 10B, and 10C.
- FIG. 9 shows an example in which the LEDs 21 to 27 are installed only in the area 10A, the LEDs 21 to 27 are arranged in the same arrangement in the areas 10A, 10B, and 10C. That is, in the light emitting module 1, all the LEDs 21 to 27 installed in the regions 10A, 10B, and 10C of the substrate 10 are used to generate combined light and emit light.
- a plurality of first color LEDs 21 and a plurality of second color LEDs 22 are arranged radially from the vicinity of the center of the circular substrate 10 toward the circumference.
- the first color LED 21 is a first light source that emits light having a first correlated color temperature (e.g. light bulb color)
- the second color LED 22 has a second correlated color temperature higher than the first correlated color temperature.
- a second light source that emits light having a color temperature (for example, daylight color light).
- the correlated color temperature is, for example, 2700K for the LED21 and 5700K for the LED22.
- a plurality of third-color LEDs 23 are arranged in black-painted locations other than the locations where the LEDs 21 and LEDs 22 shown in FIG. 9 are arranged, and a plurality of fourth-color LEDs 24 and a plurality of 5th color LEDs 25, a plurality of 6th color LEDs 26, and a plurality of 7th color LEDs 27 are arranged. Even in the arrangement described above, the LEDs 21 to 27 can exhibit high color rendering properties by setting the luminous fluxes at the ratios shown in FIG.
- FIG. 9 illustrates wiring 31 for connecting the plurality of LEDs 21 in series, wiring 32 for connecting the plurality of LEDs 22 in series, and wiring 33 for connecting the plurality of LEDs 23 in series.
- Each wiring 31 , 32 , 33 is connected to the LED driver 30 .
- Embodiment 2 A lighting device according to Embodiment 2 of the present invention will be described below with reference to the drawings.
- the configuration and operation of the light emitting module 1 are the same as those of the first embodiment.
- FIG. 10 is a configuration diagram of a spotlight illumination device 200 according to this embodiment.
- the spotlight illumination device 200 includes a light emitting module 1, a heat sink 101, and a housing 102, as in the first embodiment, and further includes a reflector 201, a diffusion plate 202, a lens 203, and a lens diffuser. A plate 204 is provided.
- the spotlight illumination device 200 also includes a power source (not shown) and a control device 40 for controlling the correlated color temperature and brightness of the illumination light.
- a radiator (heat sink) 101 radiates heat generated in the light emitting module 1 to the outside.
- a light emitting module 1 is provided at one end of the heat radiating section 101 .
- the heat radiating section 101 is composed of, for example, a plurality of heat radiating plates containing copper or the like, heat pipes connected to the plurality of heat radiating plates, and the like.
- the housing 102 is a box-shaped member provided so as to cover the heat radiating section 101 and the light emitting module 1, and is supported by legs. A circular opening is provided at the end of the housing 102 on the light emitting module 1 side.
- the housing 102 is made of, for example, an aluminum alloy.
- the reflecting part 201 is located between the light emitting module 1 and the opening of the housing 102, and reflects and mixes the light emitted by the light emitting module 1.
- the reflecting portion 201 has a cylindrical shape and has a reflecting surface on the inner wall of the cylindrical shape. In other words, the reflective surface extends in a direction perpendicular to the arrangement surface of the light emitting elements (LEDs 21 to 27) of the light emitting module 1.
- FIG. The reflective surface of the reflective portion 201 is made of any reflective material such as an aluminum reflective material.
- the diffuser plate 202 is installed in the opening of the housing 102 substantially parallel to the plane of arrangement of the light emitting elements (LEDs 21 to 27) of the light emitting module 1 . That is, the diffuser plate 202 is located on the side opposite to the light emitting module 1 of the reflector 201 .
- the diffuser plate 202 diffuses the light emitted by the light emitting module 1, reflected by the reflector 201, and mixed, to even out the unevenness of the light.
- the diffuser plate 202 has a disc shape and is made of, for example, an acrylic plate or polycarbonate.
- the lens 203 is located on the side of the diffuser plate 202 opposite to the light emitting module 1 and is installed substantially parallel to the diffuser plate 202 at a certain distance from the diffuser plate 202 . In other words, the lens 203 is provided substantially parallel to the arrangement surface of the light emitting elements (LEDs 21 to 27) of the light emitting module 1.
- FIG. The lens 203 converges or diverges the light emitted by the light emitting module 1 .
- Lens 103 is, for example, a Fresnel lens with a serrated cross section.
- the lens diffusion plate 204 has the property of diffusing and shaping the light passing through the lens 203 by using it together with the lens 203 .
- the output angle of the light transmitted through the lens diffusion plate 204 can be limited within a predetermined range.
- Lens diffusers 204 are, for example, Light Shaping Diffusers (LSD).
- LSD Light Shaping Diffusers
- the lens diffusion plate 204 is installed substantially parallel to the lens 203 and is preferably located on the opposite side of the light emitting module 1 with respect to the lens 203 .
- the characteristics of the lens 203 and lens diffusion plate 204 are selected according to the required specifications including the illuminance or 1/2 illuminance angle of the spotlight illumination device 100 .
- the lens 203 and the lens diffusion plate 204 are supported by a lens housing 205 , and the lens housing 205 is fixed to the housing 102 including the light emitting module 1 .
- the lens housing 205 may be detachable from the housing 102 or integrated with the housing 102 .
- the spotlight illumination device 200 configured as described above has high illuminance and suppresses color separation as compared with a configuration without the reflecting portion (reflector) 201, the diffuser plate 202, the lens 203, and the lens diffuser plate 204. becomes possible. Therefore, it is possible to suppress the occurrence of a bluish ring-shaped portion that occurs around conventional spotlight illumination.
- the spotlight illumination device 200 may include both the reflector 201 and the diffuser plate 202 and the lens 203 and the lens diffuser plate 204, or may include either one of them.
- the spotlight illumination device 200 may further include a position adjustment mechanism for adjusting the position of the light emitting module 1 with respect to the lens 203 and a color filter for changing the color of the illumination light.
- the light-emitting module 1 having high color rendering properties as described above is used as the light source and emits light with high efficiency. It can be suitably used in the production space.
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Abstract
Description
第1の相関色温度を有する光を発光する第1光源と、
前記第1の相関色温度よりも高い第2の相関色温度を有する光を発光する第2光源と、
それぞれ異なる発光色の光を発光可能な5種類の有色光源と、
を備え、
前記第1光源、前記第2光源、及び、前記5種類の有色光源を、それぞれ所定割合の発光強度で発光させることで、相関色温度5000K以上6500K以下で、平均演色評価数Raが98以上、特殊演色評価数R9が98以上、及び、特殊演色評価数R12が94以上の混合光を発光可能である。
この場合に、前記第1から第7の光源を
24000:0:0:0:0:0:0の光束の比で発光させることにより、2700Kの相関色温度の光を合成し、又は
22000:0:4.6:220:110:2750:0の光束の比で発光させることにより、3000Kの相関色温度の光を合成し、又は、
20000:4600:10.9:330:530:4000:0の光束の比で発光させることにより、3500Kの相関色温度の光を合成し、又は、
19000:11400:19.3:530:760:5300:0の光束の比で発光させることにより、4000Kの相関色温度の光を合成し、又は、
14800:14700:88:1050:1740:9590:87の光束の比で発光させることにより、5000Kの相関色温度の光を合成し、又は、
11000:16900:92:1350:1930:11000:230の光束の比で発光させることにより、5500Kの相関色温度の光を合成し、又は、
6000:18000:100.6:1500:1300:8000:0の光束比で発光させることにより、6500Kの色相関温度の光を合成し、又は、
3100:15000:111.5:1500:1000:6600:0の光束比で発光させることにより、8000Kの色相関温度の光を合成し、又は、
2200:15000:159.2:1500:1800:6600:0の光束比で発光させることにより、10000Kの色相関温度の光を合成し、又は、
0:15000:226.3:1500:2200:5200:0の光束比で発光させることにより、20000Kの混合光を合成するようにしてもよい。
前記調光制御手段は、FM(Frequency Modulation)調光、PWM(Pulse Width Modulation)調光、及び、DC(Direct Current)調光を組み合わせて調光を行うようにしてもよい。
前記発光モジュールを備える照明装置であって、
前記第1光源、前記第2光源、及び、前記5種類の有色光源を調光させる調光制御手段を制御する制御装置をさらに備え、
前記制御装置は、前記第1光源、前記第2光源、及び、前記5種類の有色光源の発光強度と前記相関色温度との関係を示すテーブルを予め記憶する記憶部を含み、前記記憶部に記憶されている前記テーブルを参照して、所望の前記相関色温度に対応する前記第1光源、前記第2光源、及び、前記5種類の有色光源の発光強度を決定し、決定した前記発光強度に基づいて、前記調光制御手段を制御するようにしてもよい。
前記発光モジュールの前記第1光源、前記第2光源、及び、前記5種類の有色光源の配列面に対して垂直の反射面を有し、前記発光モジュールが放射する光を反射する反射部と、前記反射部の前記発光モジュールと反対側に備えられ、前記反射部で反射された光を拡散する拡散板と、を備えてもよい。
前記発光モジュールの前記第1光源、前記第2光源、及び、前記5種類の有色光源の配列面に対して略平行に延在し、前記発光モジュールが放射する光を収束または発散させるレンズと、前記レンズに略平行に延在し、前記レンズを透過する光を拡散整形するレンズ拡散板と、を備えてもよい。
以下、本発明の実施の形態1に係る発光モジュールについて図面を参照しながら説明する。
図1は、本実施の形態に係る発光モジュール1の構成例を示す平面図である。図1に示すように、発光モジュール1は、基板10と、それぞれ複数のLED(Light Emitting Diode)21~27と、から構成される。
図2に示すように、この実施の形態のLED21は、電球色LEDから構成される。より詳細には、LED21は、例えば、相関色温度2700K(ケルビン)で、CIE(国際照明委員会)で規定された色度図(CIE1931)における色度座標(中央値)が(0.4578,0.4101)の電球色の光を発光可能なLEDから構成される。
また、LED22は、白色LEDから構成される。より詳細には、LED22は、例えば、相関色温度5700K(ケルビン)で、CIE1931における色度座標(中央値)が(0.3287,0.3417)の光を発光可能である。
LED24は、ドミナント波長λdが475nm~480nmの範囲に位置し、青(BLU)色の光を発光可能となっている。
LED25は、ドミナント波長λdが496nm~500nmの範囲に位置し、シアン(CYN)色の光を発光可能となっている。
LED26は、例えば、CIE1931における色度座標(中央値)が(0.4140,0.5430)のライムグリーン(LME)の光を発光可能である。
LED27は、ドミナント波長λdが624nm~634nmの範囲に位置し、赤(RED)色の光を発光可能となっている。
図6は、発光モジュール1を相関色温度2000K~20000Kで発光させたときの、各LEDの光束(輝度)、全光束、演色性(Ra、R9、R12、TLCI)の測定結果等を示す図である。
i) LED21~27を、24000(Lm)、0(Lm)、0(Lm)、0(Lm)、0(Lm)、0(Lm)、0(Lm)でそれぞれ発光させることにより、相関色温度2700Kで、全光束が24000(Lm)の合成光が得られる。そのときの消費電力は292.1(W)であり、発光効率が82.2(Lm/W)である。このとき、Raが96、R9が97、R12が95、TLCIが95であり、高い演色性が得られる。
次に、本実施の形態の発光モジュール1の適用例として、発光モジュール1を適用したスポットライト照明装置100について説明する。図8は、本実施の形態に係るスポットライト照明装置100の構成図である。スポットライト照明装置100は、上述の発光モジュール1、放熱部(ヒートシンク)101、筐体102、レンズ103から構成される。また、スポットライト照明装置100は、照射光の相関色温度や輝度を制御するための制御装置40及び図示せぬ電源を備える。
また、用途に応じて、基板10上に、LED21~27以外のLEDや光源が配置されていてもよい。
以下、本発明の実施の形態2に係る照明装置について図面を参照しながら説明する。発光モジュール1の構成及び動作は実施の形態1と同様である。
本実施の形態の発光モジュール1を適用した照明装置であるスポットライト照明装置200について説明する。図10は、本実施の形態に係るスポットライト照明装置200の構成図である。スポットライト照明装置200は、実施の形態1と同様の、発光モジュール1、放熱部(ヒートシンク)101及び筐体102を備え、さらに、反射部(リフレクタ)201、拡散板202、レンズ203及びレンズ拡散板204を備える。また、スポットライト照明装置200は、図示せぬ電源や、照射光の相関色温度や輝度を制御するための制御装置40を備える。
スポットライト照明装置200は、反射部201及び拡散板202と、レンズ203及びレンズ拡散板204と、を両方備えてもよく、あるいは、いずれか一方を備えてもよい。
10 基板
21~27 LED
30 LEDドライバ
31~33 配線
40 制御装置
40a 記憶部
40b プロセッサ
100,200 スポットライト照明装置
101 放熱部
102 筐体
201 反射部
202 拡散板
203 レンズ
204 レンズ拡散板
205 レンズ筐体
Claims (13)
- 第1の相関色温度を有する光を発光する第1光源と、
前記第1の相関色温度よりも高い第2の相関色温度を有する光を発光する第2光源と、
それぞれ異なる発光色の光を発光可能な5種類の有色光源と、
を備え、
前記第1光源、前記第2光源、及び、前記5種類の有色光源を、それぞれ所定割合の発光強度で発光させることで、相関色温度5000K以上6500K以下で、平均演色評価数Raが98以上、特殊演色評価数R9が98以上、及び、特殊演色評価数R12が94以上の混合光を発光可能である
ことを特徴とする発光モジュール。 - 前記第1の相関色温度は2700Kである
ことを特徴とする請求項1に記載の発光モジュール。 - 前記第2の相関色温度は5700Kである
ことを特徴とする請求項1または2に記載の発光モジュール。 - 前記第1光源は電球色光源、前記第2光源は白色光源であり、
前記5種類の有色光源は、紫色の光源、青色の光源、シアン色の光源、ライム色の光源及び、赤色の光源を含む、
ことを特徴とする請求項1から3のいずれか1項に記載の発光モジュール。 - 前記第1光源、前記第2光源、及び、前記5種類の有色光源を、それぞれ所定割合の発光強度で発光させることで、相関色温度5000K以上6500K以下で、平均演色評価数Ra及び特殊演色評価数R9が99の混合光を発光可能である
ことを特徴とする請求項1から4のいずれか1項に記載の発光モジュール。 - 前記第1光源、前記第2光源、及び、前記ライム色の光源をそれぞれ、前記5種類の有色光源のうち前記ライム色の光源以外の光源の発光強度の合計よりも十分に高い発光強度で発光させることで、相関色温度5000K以上6500K以下の混合光を発光する、
ことを特徴とする請求項4に記載の発光モジュール。 - 前記第1光源の発光光の相関色温度は2700K、前記第2光源の発光光の相関色温度は5700Kであり、前記5種類の有色光源は、紫色の光を発光する第3光源、青色の光を発光する第4光源、シアン色の光を発光する第5光源、ライム色の光を発光する第6光源及び、赤色の光を発光する第7光源を含み、
前記第1から第7の光源を、
24000:0:0:0:0:0:0の光束の比で発光させることにより、2700Kの相関色温度の光を合成し、又は
22000:0:4.6:220:110:2750:0の光束の比で発光させることにより、3000Kの相関色温度の光を合成し、又は、
20000:4600:10.9:330:530:4000:0の光束の比で発光させることにより、3500Kの相関色温度の光を合成し、又は、
19000:11400:19.3:530:760:5300:0の光束の比で発光させることにより、4000Kの相関色温度の光を合成し、又は、
14800:14700:88:1050:1740:9590:87の光束の比で発光させることにより、5000Kの相関色温度の光を合成し、又は、
11000:16900:92:1350:1930:11000:230の光束の比で発光させることにより、5500Kの相関色温度の光を合成し、又は、
6000:18000:100.6:1500:1300:8000:0の光束比で発光させることにより、6500Kの色相関温度の光を合成し、又は、
3100:15000:111.5:1500:1000:6600:0の光束比で発光させることにより、8000Kの色相関温度の光を合成し、又は、
2200:15000:159.2:1500:1800:6600:0の光束比で発光させることにより、10000Kの色相関温度の光を合成し、又は、
0:15000:226.3:1500:2200:5200:0の光束比で発光させることにより、20000Kの混合光を合成する、
請求項1から6の何れか1項に記載の発光モジュール。 - 前記第1光源、前記第2光源、及び、前記5種類の有色光源を、それぞれ所定段階の分解能で調光可能な調光制御手段をさらに備え、
前記調光制御手段は、FM(Frequency Modulation)調光、PWM(Pulse Width Modulation)調光、及び、DC(Direct Current)調光を組み合わせて調光を行う
ことを特徴とする請求項1から7のいずれか1項に記載の発光モジュール。 - 複数の前記第1光源と、複数の前記第2光源と、がそれぞれ、円形の基板の中心近傍から円周に向かう方向に放射状に配置されている、
ことを特徴とする請求項1から8のいずれか1項に記載の発光モジュール。 - 請求項1から9のいずれか1項に記載の発光モジュールを備える照明装置。
- 前記第1光源、前記第2光源、及び、前記5種類の有色光源を調光させる調光制御手段を制御する制御装置をさらに備え、
前記制御装置は、前記第1光源、前記第2光源、及び、前記5種類の有色光源の発光強度と前記相関色温度との関係を示すテーブルを予め記憶する記憶部を含み、前記記憶部に記憶されている前記テーブルを参照して、所望の前記相関色温度に対応する前記第1光源、前記第2光源、及び、前記5種類の有色光源の発光強度を決定し、決定した前記発光強度に基づいて、前記調光制御手段を制御する、
請求項10に記載の照明装置。 - 前記発光モジュールの前記第1光源、前記第2光源、及び、前記5種類の有色光源の配列面に対して垂直の反射面を有し、前記発光モジュールが放射する光を反射する反射部と、前記反射部の前記発光モジュールと反対側に備えられ、前記反射部で反射された光を拡散する拡散板と、を備える、
ことを特徴とする請求項10又は11に記載の照明装置。 - 前記発光モジュールの前記第1光源、前記第2光源、及び、前記5種類の有色光源の配列面に対して略平行に延在し、前記発光モジュールが放射する光を収束または発散させるレンズと、前記レンズに略平行に延在し、前記レンズを透過する光を拡散整形するレンズ拡散板と、を備える、
ことを特徴とする請求項10から12のいずれか1項に記載の照明装置。
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