JP7798817B2 - Lighting control software and lighting systems - Google Patents

Description

The present invention relates to lighting control software and a lighting system that operates lighting devices to make objects such as food look attractive.

The appearance of colors of objects such as food, clothing, and automobile bodies changes depending on the lighting. The appearance of a product's color is extremely important in terms of customer appeal, and lighting devices have been proposed to make products look more attractive. For example, Patent Document 1 describes a lighting device that makes meat look more vibrant.

Typically, a lighting device with lighting appropriate for each product is installed. In such cases, it is necessary to replace the lighting device when replacing a product. However, Patent Document 2 claims that by using a first light source with a warm color tone in which the spectral components of blue, red, and green light are mixed in a predetermined ratio, a second light source with a high color temperature in which the spectral components of blue, red, and green light are mixed in a different ratio than the first light source, and a third light source that has only the spectral component of blue light, it is possible to irradiate the optimal light for each food ingredient without having to change light sources for each food ingredient.

JP 2013-127855 A Patent No. 5507148

For example, as in Patent Document 1, it is desirable to emphasize the color red in order to make the redness of meat appear more vivid. However, when attempting to achieve this using the method of combining warm color light, high color temperature light, and blue light as in Patent Document 2, the color blue is added to emphasize the red color of the meat, which results in a color that is slightly on the blue side, making the redness of the target meat appear less appealing.

Therefore, an object of the present invention is to provide lighting control software and a lighting system that can operate a lighting device that can change the light to an optimal level to make the object look attractive when the object is changed.

The present invention provides lighting control software that operates a lighting control device that controls a lighting device including at least a first light-emitting element, a second light-emitting element, and a third light-emitting element, the lighting control software comprising:
The lighting control software can display an interface on the lighting control device for selecting a light emission color of a specific chromaticity by controlling the light intensity ratio of each light-emitting element,
The interface is
an object group selection interface for selecting one of a plurality of object groups from a chromaticity region that is a part of a chromaticity range surrounded by the chromaticities of the plurality of light-emitting elements;
A chromaticity selection interface is provided for selecting the specific chromaticity from a chromaticity range corresponding to the selected object group.
In the present invention, the lighting control device displays the object group selection interface screen,
When the object group is selected in the object group selection interface, a chromaticity selection interface screen may be displayed, displaying a plurality of chromaticity options corresponding to the object group.
In the lighting control device, the object group selection interface and the chromaticity selection interface are displayed on one screen;
In the present invention, when the object group is selected in the object group selection interface, a chromaticity corresponding to the object group may be highlighted in the chromaticity selection interface.

In the present invention, the chromaticity regions corresponding to the plurality of object groups may overlap.
The present invention may also be a lighting system including the lighting control software that operates the lighting control device.

The present invention provides a lighting device comprising at least a first light-emitting element, a second light-emitting element, and a third light-emitting element, and an interface for selecting an emission color of a specific chromaticity within a selectable chromaticity range by controlling a light intensity ratio of the light emitted by the light-emitting elements,
The selectable chromaticity area is:
The length of the line connecting the chromaticity of the third light-emitting element and the chromaticity of the first light-emitting element is set to 100%, and the point on that line that is 20% from the second light-emitting element and the line connecting the chromaticity of the third light-emitting element and the chromaticity of the second light-emitting element is set to 100%, but the side closer to the second light-emitting element than the line connecting the point 20% from the third light-emitting element on that line is not included.

In the present invention, a line connecting the chromaticity of the third light-emitting element and the chromaticity of the second light-emitting element may be set to 100% in length, and a line connecting a point 50% from the chromaticity of the third light-emitting element on that line may intersect with at least one of the selectable chromaticity areas.

In the present invention, the chromaticity of the third light-emitting element may be within a range surrounded by chromaticity coordinates of (0.288, 0.213), (0.327, 0.255), (0.312, 0.285), and (0.264, 0.232).

In the present invention, the chromaticity of the second light-emitting element may be within a range surrounded by chromaticity coordinates of (0.374, 0.418), (0.368, 0.494), (0.321, 0.449), and (0.324, 0.377).

In the present invention, the chromaticity of the first light-emitting element may be within a range surrounded by chromaticity coordinates of (0.575, 0.424), (0.517, 0.348), (0.685, 0.239), and (0.736, 0.264).

The present invention provides a lighting device that includes a first light-emitting element, a second light-emitting element, and a third light-emitting element, and that is capable of controlling the light intensity ratio thereof,
the first light-emitting element, the second light-emitting element, and the third light-emitting element all have a correlated color temperature of 2000 K or more and 6000 K or less;
This is a lighting device, wherein the difference in color deviation Duv between the one with the largest color deviation Duv and the one with the smallest color deviation Duv among the first light-emitting element, the second light-emitting element, and the third light-emitting element is 10 or more and 50 or less.

The present invention may further provide that the color deviation Duv of the first light-emitting element, the second light-emitting element, and the third light-emitting element is greater than or equal to -50 and less than or equal to +20.

The present invention may further provide that the maximum value of the spectra of the first light-emitting element, the second light-emitting element, and the third light-emitting element in the wavelength range of 570 nm to 600 nm is 0.25 or more relative to the maximum value in the wavelength range of 490 nm to 570 nm.

The present invention further provides a fourth light-emitting element having a correlated color temperature of 2000 K or more and 6000 K or less and a color deviation Duv of −50 or more and +20 or less,
A light intensity ratio between the first light emitting element, the second light emitting element, the third light emitting element, and the fourth light emitting element may be controllable.

In this invention, the illumination light from the object lighting device can be controlled to a chromaticity that corresponds to the object, thereby making the object appear in the desired color.

Furthermore, the present invention allows the user to quickly select an appropriate chromaticity as the chromaticity of the illumination light from the object illumination device.

1 is a diagram illustrating a configuration of a lighting system including a lighting device according to a first embodiment; Inside the lamp body of the lighting device of embodiment 1 FIG. 1 is a plan view of a light source used in an illumination device according to a first embodiment; Chromaticity diagram of three-color LEDs used in the lighting device of embodiment 1 1 is a spectrum diagram of the LEDs (D, F) used in the lighting device of the first embodiment. 1 is a spectrum diagram of the LEDs (D, E) used in the lighting device of embodiment 1. Chromaticity diagram (full chromaticity range) of the three-color LEDs used in the lighting device of embodiment 1 Schematic diagram to explain color unevenness An explanatory diagram of a straight tube LED used in a refrigerated showcase according to a second embodiment. 1 is a plan view of a printed circuit board installed inside a straight tube LED according to a second embodiment of the present invention; 10 is a diagram illustrating the configuration of a lighting device according to a third embodiment. FIG. 10 is an exploded perspective view of a lamp body of the lighting device according to the third embodiment. Chromaticity diagram of four-color LEDs used in the lighting device of embodiment 3 Synthetic spectrum obtained in the lighting device of embodiment 3 Chromaticity diagram for explaining the chromaticity of the light-emitting element in the lighting device of embodiment 4. Ingredient group selection interface in the lighting control device of embodiment 4 10 is a chromaticity diagram showing a chromaticity region when the foodstuff group “meat” is selected in the lighting control device of embodiment 4. Color selection interface displayed after selecting food ingredient group in lighting control device of embodiment 4 An interface that allows selection of food group and color corresponding to food group on one screen in the lighting control device of embodiment 4 10 is a chromaticity diagram showing a chromaticity region when the foodstuff group “fresh fish” is selected in the lighting control device of embodiment 4. 10 is a chromaticity diagram showing a chromaticity region when the food ingredient group "fruit and vegetables" is selected in the lighting control device of embodiment 4. 10 is a chromaticity diagram showing a chromaticity region when the food ingredient group "prepared dishes" is selected in the lighting control device of embodiment 4. 10 is a chromaticity diagram showing a chromaticity region when the food ingredient group "natural" is selected in the lighting control device of embodiment 4. 10 is a chromaticity diagram showing the chromaticity range of a food ingredient group and the chromaticity range not included in that chromaticity range in the lighting control device of embodiment 4. 10 is a chromaticity diagram showing a chromaticity range suitable for a light-emitting element in a lighting control device according to a fourth embodiment. Spectral diagram of light emitting elements 1, 2, 3, and composite in the lighting device of embodiment 4 10 is a spectrum diagram of the light-emitting element 3 in the lighting device of the fourth embodiment. 10 is a spectrum diagram of the light-emitting element 2 in the lighting device of the fourth embodiment.

<Embodiment 1>
<Basic configuration>
1 shows a configuration diagram of a lighting system including a lighting device 300 according to this embodiment. The lighting device 300 is a spotlight, and includes a lamp body 360, a power supply unit 380, and an arm 375 that connects the lamp body 360 to the power supply unit 380.

<Light body>
2 is an explanatory diagram showing the interior of the lamp body 360 surrounded by a frame 367. The lamp body 360 comprises a heat sink 364, a light source 320 mounted thereon, a lens 368, and a frame 367. As shown in FIG. 1, light emitted from the light source 320 is emitted by the lens 368 as illumination light 362 at a predetermined radiation angle, and illuminates an object 370.

<Power supply section>
1, power supply unit 380 is attached to and powered by a wiring duct rail 395 installed on ceiling 390 via a front attachment part 386 and a rear attachment part 388 (the inside of the wiring duct rail is normally not visible, but in this drawing the wiring duct rail is shown semi-transparent so that the attached state of power supply unit 380 can be seen). Attachment is performed by turning lever 385.

The power supply unit 380 has a slot for inserting a wireless module 382, which transmits a wireless lighting control signal 352 sent from an external lighting control device 350 to the power supply unit 380.

The power supply unit 380 has three channels of drive output for independently driving the three color LEDs. The wireless module 382 transmits control signals to the power supply unit 380, thereby controlling each of the three channels of drive output.

<Lighting control device>
The lighting control device 350 is comprised of a tablet, smartphone, or PC, and runs lighting control software 351. The user adjusts the light emission intensities of the three color LEDs using the lighting control software 351. The conditions for the light emission intensities of the three color LEDs are transmitted as a wireless lighting control signal 352.

<Light source>
A plan view of the light source 320 used in this embodiment is shown in FIG. 3. The light source 320 has three color light-emitting elements arranged in a light-emitting region 322 on a substrate 321 having a wiring pattern. The light-emitting elements are CSP (Chip Size Package) type LEDs 323-1(E), CSP type LEDs 323-2(D), and CSP type LEDs 323-3(F), 17 of each, arranged as shown in FIG. 3 and connected in series by wiring inside the substrate. The light source 320 has mounting holes 325, and is fastened to the heat sink 364 by passing screws through the mounting holes 325. The light source 320 has a wiring terminal 326-1 (for CSP type LED 323-1), a wiring terminal 326-2 (for CSP type LED 323-2), a wiring terminal 326-3 (for CSP type LED 323-3), and a wiring terminal 326-0 (common terminal), and is connected to a power supply unit 380 having three outputs, which controls the light emission of each LED.

<LED structure>
The light-emitting elements CSP type LED323-1, CSP type LED323-2, and CSP type LED323-3 used in the embodiment include a blue LED chip made of InGaN or the like, a phosphor-containing resin covering the side and top surfaces of the blue LED chip, and terminals for passing current on the bottom or side surfaces of each LED. As the phosphor, one or more of a green phosphor that absorbs the light of the blue LED and emits green light, a yellow phosphor that emits yellow light, and a red phosphor that emits red light are used.

In each of the above LEDs, for example _, (Y1 _{-xGdx ) 3Al5O12} :Ce2 ⁺ (0≦x≦1) can be used as the yellow phosphor, for _{example , Lu3Al5O12} : _Ce2 ⁺ can be used as the green phosphor, and for example, _{SrxCa1 - xAlSiN3} :Eu3 ⁺ (0≦x≦1) phosphor, Sr[ _LiAl3N4 ]:Eu2 ⁺ , _{or K2SiF6} : ^Mn4+ _phosphor can be used as the red phosphor. Quantum dots can also be used.

<LED chromaticity>
Figure 4 is a chromaticity diagram (CIE 1931 chromaticity coordinate diagram) for explaining the chromaticity of these LEDs, showing the line connecting the chromaticities of the blackbody radiation locus as BBL. It also shows a line representing the correlated color temperature (TCCT), which is the chromaticity that appears closest to the color temperature ( _TCT) on the _BBL , and a line representing the color deviation (Duv) from the BBL.

The chromaticities of the light-emitting elements CSP type LED323-1, CSP type LED323-2, and CSP type LED323-3 used in this embodiment are "E" (meat LED), "D" (bread LED), and "F" (fresh fish LED) in Figure 4, respectively. However, "meat, bread, and fresh fish" are merely examples, and "E" is suitable for a variety of objects, such as red fruit and "D" for fried foods.

The chromaticity coordinates of CSP type LED 323-1 (D) are (0.458.0.407).

The chromaticity coordinates of CSP type LED 323-2 (E) are (0.412, 0.327).

The chromaticity coordinates of CSP type LED 323-3 (F) are (0.358, 0.342).

The correlated color temperature T _CCT (unit: K (Kelvin)) is approximately 2700K for E and D, and approximately 4500K for F, with a difference of approximately 1800K.

The color deviation Duv is approximately -1 for D and approximately -31 for E, with a difference of approximately 30.

Furthermore, the color deviation Duv of all three LED colors is on the negative side of the black body radiation locus (BBL = Black Body Locus).

The chromaticity of each LED can also be displayed using the CIE 1976 chromaticity coordinates (u', v') instead of the CIE 1931 chromaticity coordinates (x, y). The two can be converted to each other using the formulas u' = 4x/(-2x + 12y + 3), v' = 9y/(-2x + 12y + 3). Display using other chromaticity coordinate systems is also possible.

In particular, the chromaticity of the CSP type LED 323-2 is characterized by a large absolute value of color deviation Duv of -31, which is far from the blackbody radiation locus (BBL). By combining the CSP type LED 323-2 with the CSP type LED 323-1 and CSP type LED 323-3, which are relatively close to the blackbody radiation locus, the color deviation can be adjusted appropriately.

By appropriately combining the light from the light-emitting elements CSP type LED 323-1 (D), CSP type LED 323-2 (E), and CSP type LED 323-3 (F), it is possible to obtain light of the chromaticity of the triangle in Figure 4 and the area inside it. For example, the colors of the points indicated as DE, EF, and EF in the figure can be used appropriately to match the ingredients.

Conventionally, color-adjustable lighting, which changes color temperature, is used to combine multiple colors. By changing the "color temperature" along the blackbody radiation, color-adjustable lighting can adjust between "cool colors, high color temperature, fluorescent light colors" and "warm colors, low color temperature, incandescent light colors," achieving lighting that feels natural to people. Unlike such "living space" lighting, this example uses lighting with a changed "color deviation" that feels strange to people, to create lighting that brings out the colors of objects.

The light-emitting elements CSP-type LED 323-1 (D), CSP-type LED 323-2 (E), and CSP-type LED 323-3 (F) also have distinctive spectra. Figure 5 shows the spectra of D and F, and Figure 6 shows the spectra of D and E after passing through an optical system such as lens 368. Each graph is normalized by the maximum value of G (green) in the wavelength range of 490 to 570 nm. Unlike the composite of RGB monochromatic light described below, the spectrum of each light-emitting element contains spectral components across the entire wavelength range. However, the maximum value of R (red) in the wavelength range of 600 to 660 nm > the maximum value of G (green) in the wavelength range of 490 to 570 nm > the maximum value of Y (yellow) in the wavelength range of 570 to 600 nm, with Y suppressed (the maximum value of Y is smaller than the maximum values of R and G), emphasizing the red color. Therefore, the spectrum obtained by combining D, E, and F also has an "R>G>Y" relationship.

Figure 5 compares the spectra of D and F, normalizing the light intensity by the maximum value of G. It can be seen that F, with its high color temperature, weakens the R component and strengthens the B component compared to D, with its low color temperature.

Figure 6 compares the spectra of D and E, normalizing the light intensity by the maximum value of G. It can be seen that E, which has a large absolute value on the negative side of Duv, strengthens the B and R components compared to D, which has a small absolute value of Duv.

It should be noted that the vertical axis in Figures 5 and 6 represents light intensity and does not take luminosity into account. The luminosity coefficients in the CIE 1931 relative luminosity curve are 0.06472 at a wavelength of 450 nm (B), 0.95447 at a wavelength of 540 nm (G), 0.89636 at a wavelength of 580 nm (Y), and 0.29803 at a wavelength of 630 nm (R). The coefficients for G and Y are close to 1, while the coefficients for B and R are small. Therefore, the G and Y components have a large impact on the overall appearance of color.

Taking this into consideration, in each color spectrum, the maximum value of Y (a value that does not take visibility into account) should be 0.25 or greater, with the maximum value of G being 1, and 0.5 or greater is more preferable. On the other hand, it is preferable that the maximum value of Y is below the line connecting the maximum values of G and R, with the Y component suppressed, and it is more preferable that the maximum value of Y is below the maximum value of G.

The difference between the method using light-emitting elements of three colors, D, E, and F, each with a distinctive spectrum, and the RGB (red, green, blue) method, which can theoretically produce all colors, is explained using Figure 7. In Figure 7, R is red, G is green, and B is blue. Since all colors can be obtained using RGB, one might wonder if using the three colors, D, E, and F, makes no difference to the RGB method. However, as shown in Figure 7, the area enclosed by the three colors, D, E, and F, is extremely small compared to the area enclosed by the three colors, RGB.

Figure 8 shows a schematic diagram illustrating color unevenness. Light source 320' consists of three color LEDs (E, F, G) that illuminate white object 370' via lens 368'. Because the light from the three LEDs does not completely overlap, areas marked D-rich, E-rich, and F-rich result. If an RGB primary color light source were used, these areas would be R-rich, G-rich, and B-rich, but because R, G, and B are different primary colors, color unevenness would be noticeable. In this invention, by using three color LEDs with a limited chromaticity range rather than a primary color light source, the chromaticity differences in areas where the light does not overlap sufficiently are minimal to begin with, thereby essentially reducing color unevenness.

By using D, E, and F lighting, which contain not only R, G, and B components but also a moderate Y component and have spectra that are naturally suited to lighting objects, or by using lighting that combines these colors, it is possible to achieve lighting that is suitable for a variety of foods, such as red and yellow fruits, green vegetables, red meat, sashimi, and salmon, blue-backed fish, and brown bread, baked goods, and fried foods. While this lighting device was developed with food ingredients in mind, it has also been shown to produce beautiful results when used to illuminate a variety of objects, including clothing, car bodies, furniture, accessories, and flowers. However, there are cases where a color looks beautiful in the store but different at home, so it is preferable to adjust and add light such as E, which has a large absolute value of color deviation. This lighting device is advantageous because it allows for fine-tuning of the amount of color deviation, or in other words, how colors appear, through "color mixing."

Furthermore, in the light source 320 shown in Figure 3, the chromaticity difference between the three color LEDs arranged in the light-emitting area 322 is small, which has the advantage that color unevenness when irradiated onto an object is small and almost invisible.

The correlated color temperature _TCCT of each light-emitting element used in the present invention is 2000K or higher, preferably 2500K or higher, and 6000K or lower, preferably 5000K or lower.

The color deviation Duv (1000 times the color deviation duv) of each light-emitting element used in the present invention should be -50 or more (absolute value 50 or less), preferably -40 or more (absolute value 40 or less), and +20 or less, preferably +10 or less. The difference in color deviation between the two light-emitting elements with the largest difference in color deviation should be 50 or less, and preferably 40 or less. By using light-emitting elements with such limited color deviation, color unevenness can be reduced. On the other hand, in order to accommodate objects of various colors, the color deviation between the two light-emitting elements with the largest difference in color deviation should be 10 or more, preferably 20 or more, and even more preferably 30 or more.

The difference in correlated color temperature T _CCT between the light-emitting element with the lowest color temperature (D in embodiment 1) and the light-emitting element with the highest color temperature (F in embodiment 1) used in the present invention is 400 K or more, preferably 800 K or more, and more preferably 1200 K or more in order to accommodate objects of various colors. On the other hand, from the viewpoint of reducing color unevenness, the difference is 3000 K or less, preferably 2000 K or less.

<Embodiment 2>
<Basic configuration>
The second embodiment is an embodiment of a straight tube LED type lighting device.

<Refrigerated showcase>
9 is an explanatory diagram of a refrigerated showcase 410 with the front cut away to explain the straight tube LEDs used in the refrigerated showcase. The refrigerated showcase 410 has an opening 411, a top plate 414, shelves 415, and a bottom plate 416. Straight tube LEDs 460 are provided under the top plate 414 and shelves 415 to illuminate foodstuffs placed on the shelves 415 and bottom plate 416.

<Straight tube LED>
The straight tube LED 460 is provided with a cylindrical or semi-cylindrical translucent cover member. Fig. 10 is a schematic plan view of a printed circuit board 421 installed inside the translucent cover member of the straight tube LED. Surface-mounted LEDs 423-1 (D), 423-2 (E), and 423-3 (F) are mounted on the surface of the printed circuit board 421. Note that D, E, and F in parentheses indicate the chromaticity of each LED in Fig. 4.

The color of the straight tube LEDs 460 is controlled so that they emit a color that suits the food placed on the shelf. If control wiring is installed inside the refrigerated showcase, the color can be changed using wired control rather than wireless control.

<Embodiment 3>
<Basic configuration>
11 shows a lighting device 500 according to this embodiment. The lighting device 500 is a spotlight, and comprises a lighting body 560, a power supply unit 580, and an arm 575 that connects the lighting body 560 to the power supply unit 580. The lighting device 500 can be connected to a wiring duct rail. To wirelessly control the emitted light color, the power supply unit 580 is provided with a wireless module 582, which is a detachable wireless transceiver, and the emitted light color is changed using the lighting control device 350.

<Light body>
12 is an exploded perspective view of the lighting body 560. The lighting body 560 comprises a heat sink 564, a printed circuit board 521 mounted on the heat sink 564, a multi-lens 566, and twelve lenses 568 integrally molded within the multi-lens. Twelve surface-mounted LEDs 523 are mounted on the printed circuit board 521, and each of the surface-mounted LEDs 523 corresponds to a corresponding lens 568.

<Light source>
Fig. 13 is a chromaticity diagram for explaining the chromaticity of LEDs. The surface-mounted LED 523 is composed of three LEDs of each of the four colors shown in Fig. 13: B27 (2700K), A27 (T _CCT = 2700K, Duv = -10), B46 (4600K), and A46 (T _CCT = 4600K, Duv = -10). This allows the LEDs to emit colors with chromaticities within the square shown in Fig. 13, such as AW30 (T _CCT = 3000K, Duv = -4), AW35 (T _CCT = 3500K, Duv = -5), and AW42 (T _CCT = 4200K, Duv = -5).

As an example of a spectrum obtained by combining the colors in FIG. 13 , the composite spectrum for AW35, i.e., T _CCT = 3500K, is shown in FIG. 14 . The blue component around 450 nm is represented by B, the green component around 550 nm by G, the yellow component around 590 nm by Y, and the red component around 630 nm by R. In the clothing industry, to display objects in natural colors, it is preferable for the light to cover the entire spectral range and for the color rendering index Ra to be 90 or higher, with 93 or higher and even 95 or higher being more preferable. Even under these conditions, taking into consideration the preference for whitish colors with less yellowing in the clothing industry, the Y component is slightly reduced and the R component is increased compared to a typical high-color-rendering LED shown by the dotted line in FIG. 13 . As a result, the color temperature does not change significantly, and the color deviation Duv is approximately -5. The half-width indicated by the dotted line is approximately 180 nm, but is preferably 150 nm or more. In particular, when the peak of R is taken as 100%, Y (590 nm) should be 50% or more, preferably 60% or more, and more preferably 70% or more.

Here, the first light-emitting element, designated B, and the second light-emitting element, designated A, preferably have a difference in color deviation Duv of 5 or more, more preferably 10 or more. On the other hand, for objects that are commonly seen under normal lighting, such as clothing, car bodies, furniture, small items, and flowers, it is preferable that the difference in Duv be 15 or less, so that there is little sense of incongruity when illuminated with this lighting device compared to when illuminated with a normal lighting device. For food products, it is preferable to set the difference in Duv to 15 or more, with an emphasis on how colors appear in stores, making meat and red fruit in particular look more attractive.

<Fourth Embodiment>
<Basic configuration>
For an explanation of the lighting system including the lighting device 300A according to this embodiment, please refer to the configuration diagram shown in Figure 1. In this embodiment, the lighting device 300A and the lighting control device 350A are used, so 300 in Figure 1 will be read as 300A and 350 as 350A. Lighting control software 351A (not shown) is installed in the lighting control device 350A.

<Light source>
The light source 320A used in the lighting device 300A is configured by arranging 24 CSP (Chip Size Package) type LEDs 323A-1 (R (red)), 24 CSP type LEDs 323A-2 (GYw (greenish yellow white)), and 24 CSP type LEDs 323A-3 (Wp (purplish white)) in a mixed manner in a light-emitting region 322A on a substrate 321A having a wiring pattern, and connecting them in series with wiring inside the substrate.

<LED chromaticity>
FIG. 15 is a chromaticity diagram (CIE 1931 chromaticity coordinate diagram) for explaining the chromaticity of the light-emitting element used in the lighting device of this embodiment, and shows a line representing the correlated color temperature _TCCT , which is the chromaticity that appears to be the color closest to the color temperature TCT on the blackbody radiation locus BBL, and a line representing the color deviation duv from the blackbody radiation locus BBL (although FIG. 15 uses duv, the specification will use Duv, which is 1000 times that).

The chromaticities of the CSP type LED 323A-1, CSP type LED 323A-2, and CSP type LED 323A-3, which are the light-emitting elements used in this embodiment, are "R," "GYw," and "Wp," respectively, in Figure 15.

The chromaticity coordinates of the CSP type LED 323A-1(R) are (0.58, 0.36), its correlated color temperature T _CCT is about 1300K, and Duv is about -10.

The chromaticity coordinates of the CSP type LED 323A-2 (GYw) are (0.34, 0.44), its correlated color temperature T _CCT is about 5100K, and Duv is about +40.

The chromaticity coordinates of the CSP type LED 323A-3 (Wp) are (0.29, 0.24), its correlated color temperature T _CCT is about 15000K, and Duv is about -37.

In the chromaticity range bounded by R, GYw, and Wp of each light-emitting element in Figure 15, the portion that overlaps with the BBL (the line where duv = 0) is from approximately 3000K to approximately 6700K, which is within the range obtained by combining a typical incandescent LED and a daylight LED. On the other hand, with this lighting device, for example, at T _CCT = 5000K, Duv can be changed from -50 to +35. This is possible because color adjustment is performed using three light-emitting elements, and in particular, Duv of the chromaticity coordinates of Wp is set to approximately -37, which is on the negative side. For Wp, it is preferable that T _CCT be 7000K to 50,000K, and Duv be -50 to -20, preferably 10,000K to 30,000K, and Duv be -50 to -20.

<Interface 0: Mode Selection>
The applicant has proposed, for example, an interface for selecting "color temperature/color deviation" as shown in Figures 8 and 10 of Japanese Patent Application Laid-Open No. 2021-190283, and a "color setting button" type interface as shown in Figure 5 of the same document. In addition to these, this embodiment uses lighting control software 351A that presents the option of "fresh mode." Alternatively, there may be no other options and the user may proceed directly to the "fresh mode" interface.

<Interface 1: Selection of ingredient group (target object group)>
16 shows the interface 50. This is a screen for selecting an ingredient group. Note that the ingredient group is an example, and other object groups, such as a clothing group or a furniture group, may also be displayed.

The ingredient group selection buttons 51 in Figure 16 display 51A "Meat," 51B "Fresh Fish," 51C "Vegetables," 51D "Prepared Meals," and 51E "Natural." When 51A "Meat" is pressed, the explanation for 51A "Meat" is displayed in explanation field 52: "Colors that bring out the natural color of lean ingredients. Recommended: Fresh Meat, Sushi, and Lean Fish." From this explanation, it can be seen that even in meat mode, it also supports lean fish such as tuna sashimi and octopus (meaning fish and shellfish as ingredients, not living fish).

Pressing the Confirm button 53X selects the ingredient group "meat" and moves to a detailed color selection interface. You can also press the Cancel button 53Y to select a different ingredient group.

<Interface 2: Color selection>
When the ingredient group "meat" is selected, a specific color can be selected within the chromaticity region indicated as MT in the chromaticity diagram of FIG. 17. Here, selectable chromaticity points are shown within the chromaticity region MT by interface 65. Note that if a second interface capable of continuously changing chromaticity is used, the selectable chromaticities are not limited to these points. Rather than selecting a chromaticity from the entire region enclosed by the chromaticities of the three light-emitting elements R-GYw-Wp, the chromaticity region is first limited to the ingredient, and the user can then select from within that region, allowing the user to quickly set an appropriate chromaticity.

Figure 18(a) shows an interface 60. This displays multiple color selection buttons 61, for example seven, for selecting a color from the ingredient group "meat." The color of each color selection button 61 mimics the corresponding luminous color. In addition, an explanation field 62 may display a description of the appropriate ingredient, such as "chicken," "pork," "beef," or "XX," corresponding to each chromaticity selection button. A dimming rate is also determined for each color selection button 61, and the explanation field 62 may include an explanation of the dimming rate, such as a dimming rate of 100%, but the dimming rate may also be set separately from the color selection buttons 61.

The user selects one of the color selection buttons 61 and presses the confirm button 63X to confirm the chromaticity. Pressing the cancel button 63Y returns the user to the ingredient group selection screen shown in Figure 16.

The interface 60 limits the number of color selection buttons 61 to make it easier for the user to select, so there may be cases where the appropriate color is not displayed. In that case, the user can press the details button 64 to move to the interface 65 shown in Figure 18(b), which allows for detailed color selection.

The interface 65 has 40 color selection buttons 66 arranged vertically and horizontally. An explanation box 67 is superimposed on the color selection buttons, indicating that the button is suitable for "chicken" or "pork." The user selects a color selection button 66, sets the brightness control 69 to an appropriate value, and presses the confirm button 68X to set the color and brightness selected by the user.

When multiple color selection buttons 61 and 66 are used, the selectable chromaticities are discrete, but the chromaticity area MT is an area that surrounds the selectable chromaticities.

As mentioned above, the chromaticity range corresponding to each food group is limited to a portion of the chromaticity range that can be achieved by the lighting device's light-emitting elements, and chromaticity options that are not suitable for use with that food group are pre-selected. This makes it easier for users to select an appropriate color.

Interfaces 1 and 2 may be displayed on separate screens as described above, or both may be displayed on a single display screen. Figure 19 shows interface 150, an example of displaying interfaces 1 and 2 on a single display screen.

First, select 151B "Fresh Fish" from the ingredient group selection buttons 151 (151A, 151B, 151C, 151D, 151E). Then, of the multiple color selection buttons 161, the color selection button 161BS corresponding to ingredient group 151B "Fresh Fish" is highlighted. Here, the button is displayed with a thick border.

When the user selects one of the buttons 161BS, that area is further highlighted, in this case with diagonal stripes.

Setting the sliding brightness control 171 to an appropriate value and pressing the confirm button 163X will set the color and brightness selected by the user.

When the ingredient group "fresh fish" is selected, a color can be selected within the chromaticity region indicated as FS in the chromaticity diagram in Figure 20. There is an overlap between the chromaticity region FS and the chromaticity region MT. In this case, too, the chromaticity can be determined in an interface similar to the chromaticity button interface 65 in Figure 18. Figure 20 also shows the chromaticity points that can be selected in this case.

When the ingredient group "fruit and vegetables" is selected, colors within the chromaticity region indicated as VG on the chromaticity diagram in Figure 21 can be selected. Figure 21 also shows chromaticity points that can be selected when using a chromaticity selection interface similar to interface 65.

When the ingredient group "prepared dishes" is selected, colors within the chromaticity regions shown as DT1 and DT2 on the chromaticity diagram in Figure 22 can be selected. In this way, there may be multiple chromaticity regions corresponding to an ingredient group. Figure 22 also shows chromaticity points that can be selected when using a chromaticity selection interface similar to interface 65.

If the ingredient group "Natural" is selected, colors within the chromaticity region indicated as NR on the chromaticity diagram in Figure 23 can be selected. Figure 23 also shows chromaticity points that can be selected when using a chromaticity selection interface similar to interface 65.

<Relationship between the chromaticity range of each food group and the overall chromaticity range>
24 is a chromaticity diagram in which the chromaticity regions MT, FS, VG, DT1, DT2, and NR corresponding to the above-mentioned food groups are displayed overlapping each other. The entire chromaticity region consisting of the chromaticity regions MT, FS, VG, DT1, DT2, and NR is considered to be the selectable chromaticity region. It can be seen that there are overlapping portions of the chromaticity regions corresponding to the food groups.

In this embodiment, the chromaticity of the three light-emitting elements used to combine colors is set close to the selectable chromaticity range. Specifically, Wp, which falls within the chromaticity range described below, is used instead of the primary color blue, and GYw, which falls within the chromaticity range described below, is used instead of the primary color green. However, R, which falls within the chromaticity range that roughly corresponds to the primary color red, is used for red.

As a result, as shown in Figure 24, if the length of the line connecting the chromaticity of light-emitting element Wp and the chromaticity of light-emitting element R is 100%, and a point on that line that is 50% from the chromaticity of light-emitting element Wp and a line connecting the chromaticity of light-emitting element Wp and the chromaticity of light-emitting element GYw are 100% long, a line connecting a point on that line that is 50% from the chromaticity of light-emitting element Wp intersects the selectable chromaticity area. Also, if the length of the line connecting the chromaticity of light-emitting element GYw and the chromaticity of light-emitting element R is 100%, and a line connecting a point on that line that is 50% from the chromaticity of light-emitting element GYw and the chromaticity of light-emitting element Wp are 100% long, a line connecting a point on that line that is 50% from the chromaticity of light-emitting element GYw and the chromaticity of light-emitting element Wp intersects the selectable chromaticity area.

On the other hand, the selectable chromaticity range does not include the vicinity of the color emitted by only one type of light-emitting element, i.e., the vicinity of the chromaticity point of light-emitting element GYw, the vicinity of the chromaticity point of light-emitting element Wp, or the vicinity of the chromaticity point of light-emitting element R. The reason for this is that the total luminous flux is high when all three types of light-emitting elements are used, but the total luminous flux is low when only one type of light-emitting element is used. Also, since the luminous efficiency of LEDs decreases in the high current range, when all three types of light-emitting elements are used, the current value of each becomes small and the luminous efficiency is high, but when only one type of light-emitting element is used, the luminous efficiency is low. Furthermore, as will be described later, by combining the spectra of each light-emitting element, a spectrum suitable for each food ingredient group is obtained.

Specifically, for the chromaticity coordinates of the light-emitting elements R, GYw, and Wp used in this embodiment shown in Figure 24, the length of the line connecting the chromaticity of light-emitting element R and the chromaticity of light-emitting element Wp is set to 100%, and the length of the line connecting the chromaticity of light-emitting element R and the chromaticity of light-emitting element GYw at a point 45% from light-emitting element R on that line is set to 100%, and the chromaticity on the light-emitting element R side of the line connecting the chromaticity of light-emitting element R and the chromaticity of light-emitting element GYw at a point 45% from light-emitting element R on that line is not used as a selectable chromaticity area.

Furthermore, if the length of the line connecting the chromaticity of light-emitting element Wp and the chromaticity of light-emitting element R is taken as 100%, and a point on that line that is 30% from light-emitting element Wp is taken as 100%, and a line connecting the chromaticity of light-emitting element Wp and the chromaticity of light-emitting element GYw is taken as 100%, and a point on that line that is 30% from light-emitting element R is taken as 100%, then the chromaticity on the light-emitting element Wp side of the line connecting that point is not used as a selectable chromaticity range.

Furthermore, if the length of the line connecting the chromaticity of light-emitting element GYw and the chromaticity of light-emitting element R is taken as 100%, and the point on that line 30% from light-emitting element GYw is taken as 100%, and the length of the line connecting the chromaticity of light-emitting element GYw and the chromaticity of light-emitting element Wp is taken as 100%, the chromaticity on the light-emitting element GYw side of the line connecting the point 30% from light-emitting element GYw is not used as a selectable chromaticity range.

These are just examples, and it is preferable that the chromaticity of the light-emitting element is not included in the chromaticity range of the object group. It is also preferable that the chromaticity of the light-emitting element's neighborhood is not included in the chromaticity range of the object group. As a specific example of neighborhood chromaticity, if the length of a line connecting the chromaticity of a certain light-emitting element (let's say light-emitting element 0) and the chromaticity of another light-emitting element (let's say light-emitting element 1) is taken as 100%, and a point on that line that is at least 20% from light-emitting element 0 is taken as 100%, and a line connecting the chromaticity of light-emitting element 0 and the chromaticity of another light-emitting element (let's say light-emitting element 2) that is different from the above is taken as 100%, then it is preferable that the chromaticity on the light-emitting element 0 side of the line connecting the point on that line that is at least 20% from light-emitting element 0 is not used as the chromaticity range of the object group.

The inventors created and examined Wp, GYw, and R, which have slightly different chromaticities. They determined the selectable chromaticity range and, when the chromaticity range near the light-emitting element is not used as described above, found that the preferred chromaticity range for the light-emitting element is the following range.

Figure 25 shows a chromaticity diagram illustrating the preferred chromaticity ranges for light-emitting elements. As mentioned above, the area enclosed by the chromaticities of the three light-emitting elements covers the selectable chromaticity range consisting of the food group chromaticity ranges MT, FS, VG, DT1, DT2, and NR, and a chromaticity that does not deviate too far from this range is preferred. Specifically, the preferred area Wp(1) for the chromaticity of Wp is the range enclosed by the chromaticity coordinates of (0.288, 0.213), (0.327, 0.255), (0.312, 0.285), and (0.264, 0.232), and the even more preferred area Wp(2) is the range enclosed by the chromaticity coordinates of (0.286, 0.219), (0.305, 0.24), (0.295, 0.26), and (0.271, 0.233).

The preferred region GYw(1) for GYw chromaticity is the range bounded by the chromaticity coordinates of (0.374, 0.418), (0.368, 0.494), (0.321, 0.449), and (0.324, 0.377), and the more preferred region GYw(2) is the range bounded by the chromaticity coordinates of (0.36, 0.433), (0.36, 0.473), (0.328, 0.443), and (0.329, 0.405).

The region R(1) suitable for the chromaticity of R is the range surrounded by the chromaticity coordinates of (0.575, 0.424), (0.517, 0.348), (0.685, 0.239), and (0.736, 0.264).

<Spectrum of Light-Emitting Element>
FIG. 26 shows the light emitting elements LED323A-1, LED323A-2, and LED323A-3 used in this embodiment, and the spectrum obtained by combining the light emitted from these three elements by one-third (represented as 1, 2, 3, and composite, respectively).

LED 323A-1 has a strong peak in the R (red) region, near a wavelength of 640 nm.

The spectrum of LED323A-3 (labeled as 3) is shown in Figure 27. It shows peaks not only in the B (blue) region, near a wavelength of 450 nm, but also in the G (green) region, near a wavelength of 525 nm, and in the R (red) region, near a wavelength of 630 nm. While there is a dip in the Y (yellow) region, near a wavelength of 570 nm, it is still greater than 50% (60-80%) of the G peak.

The spectrum of LED323A-2, displayed as 2, is shown in Figure 28. The color appears to be white with a yellow-green tinge overall, but there is a peak in the G (green) region, near a wavelength of 525 nm, and a dip in the Y (yellow) region, near a wavelength of 580 nm (greater than 50% (50-70%) of the G peak). There are also peaks in the B (blue) region, near a wavelength of 460 nm, and in the R (red) region, near 625 nm.

In this way, by combining light from light source "1" which has a peak in the red wavelength region, light source "2" which has a peak in the green wavelength region and sub-peaks in the red and blue wavelength regions, and light source "3" which has a peak in the blue wavelength region and sub-peaks in the red and green wavelength regions, it is possible to obtain light with peaks in the red, green, and blue wavelength regions, with a spectrum that smoothly transitions between them except for blue-green (near 480 nm), as shown in "Combined" in Figure 26, for example. This light emphasizes the red, green, and blue wavelength regions of ingredients, while slightly suppressing the yellow wavelength region (near 570 nm wavelength), which in many ingredients reduces the vividness of blue and red colors, making the ingredients look more appealing.

<Provisos and variations>
(1) The light-emitting element is not limited to an LED, but may be any light-emitting element, such as an organic EL (organic LED), an element in which the phosphor and excitation light source are separated, an element that uses discharge, or an element that is excited by an electron beam.

(2) In embodiment 1, CSP-type LEDs are mounted on a single substrate for each color LED, and in embodiments 2 and 3, SMD (Surface Mount Device)-type LEDs are mounted on a printed circuit board. However, the light source for the chromaticity and spectrum of embodiment 3 may be a CSP, and the light source for the chromaticity and spectrum of embodiment 1 may be an SMD. COB-type LEDs may also be used, in which blue LED chips are arranged on a substrate and multiple blue LED chips are covered with a resin containing phosphor.

(3) Although examples using three-color LEDs and four-color LEDs have been given as light sources using LEDs of multiple emission colors, it is also possible to use only two-color LEDs with different color deviations (e.g., D and E, F and E, A46 and B27).

(4) The chromaticity of each LED in the embodiment is an example and may be other chromaticities.

(5) Although examples of spotlights and straight-tube LEDs have been shown as lighting devices, they may also be downlights, universal (variable direction) downlights, or surface or linear light sources known as base lights.

(6) Although wireless control has been used as an example of the method for controlling the light color of the lighting device, wired control may also be used.

(7) In this application, the term "object" is used to include not only "merchandise" but also "non-saleable items" such as art and antiques in a museum, and children's paintings at an exhibition.

(8) The chromaticity coordinates may vary to the extent of the range of chromaticity distinguishable by humans. The "MacAdam color discrimination ellipse (MacAdam ellipse)" has been proposed as the range of chromaticity distinguishable by humans. Because the chromaticity coordinates have a spread similar to that of a MacAdam ellipse, the color deviation and correlated color temperature ranges also allow for a difference of 3 steps of the MacAdam ellipse, and even looking at the specifications of commercially available LEDs, it is said that there is color variation of this extent.

(9) In this application, the "chromaticity of the light-emitting element" and "color temperature of the light-emitting element" refer to the chromaticity and color temperature that can be observed externally. When light from the light-emitting element passes through an optical system such as a lens and is emitted to the outside, these chromaticity and color temperature include the effects of spectral changes caused by passing through the lens, etc.

(10) The multiple color selection buttons 161 in Figure 19 may be provided so that colors can be selected from the entire range of chromaticity that can be achieved by the light-emitting elements used, or may be provided so that a chromaticity range is narrowed down in advance and colors can be selected from within that range.

(11) The color selection interface may include an input box for searching for the name of an object, such as the name of an ingredient, and may allow the user to select one or more recommended colors corresponding to the searched ingredient. In this case, the same recommended color may be displayed even if the words used vary, such as "chicken," "chicken meat," or "poultry."

(12) The color selection interface may display a list of object names, such as food ingredients, and allow the user to select one or more recommended colors corresponding to the selected ingredient. In this case, the same recommended color may be displayed even if the ingredient name varies, such as "chicken," "chicken meat," or "poultry."

The above-disclosed embodiments are illustrative in all respects and are not intended to be limiting. Therefore, the technical scope of the present invention should not be interpreted solely by the above-disclosed embodiments, but should be defined based on the claims. Furthermore, all modifications within the scope and meaning equivalent to the claims are included.

50, 60, 65, 150 Interface 51, 151 Ingredient group selection button 52, 62, 67 Explanation field 53X, 63X, 68X, 163X Confirmation button 53Y, 63Y, 68Y, 163Y Cancel button 61, 66, 161, 161B, 161BS Color selection button 64 Details button 69, 171 Light control volume 300, 300A, 500 Illumination device 320, 320A Light source 321, 321A Board 322, 322A Light-emitting area 323, 323A CSP type LED
325 Mounting hole 326 Wiring terminal 350, 350A Lighting control device 351, 351A Lighting control software 352 Lighting control signal 360 Light body 362 Illumination light 364 Heat sink 367 Frame 368, 368' Lens 370 Object 375 Arm 380 Power supply unit 382 Wireless module 385 Lever 386 Front mounting portion 388 Rear mounting portion 390 Ceiling 395 Wiring duct rail 410 Refrigerated showcase 411 Opening 414 Top plate 415 Shelf plate 416 Bottom plate 421 Printed circuit board 423 Surface-mounted LED
460 straight tube LED
521 Printed circuit board 523 Surface mount LED
560: Light body 564: Heat sink 566: Multi-lens 568: Lens 575: Arm 580: Power supply unit 582: Wireless module

Claims (6)

A lighting control software that operates a lighting control device that controls a lighting device including at least a first light-emitting element, a second light-emitting element, and a third light-emitting element that emit light of different colors, comprising:
The lighting control software can display an interface on the lighting control device for selecting a light emission color of a specific chromaticity by controlling the light intensity ratio of each light-emitting element,
The interface is
an object group selection interface for selecting one of a plurality of object groups from a chromaticity region that is a part of a chromaticity range surrounded by the chromaticities of the plurality of light-emitting elements;
a chromaticity selection interface for selecting the specific chromaticity from a chromaticity range corresponding to the selected object group;
the chromaticity regions corresponding to the plurality of object groups overlap;
Lighting control software. A lighting control software that operates a lighting control device that controls a lighting device including at least a first light-emitting element, a second light-emitting element, and a third light-emitting element that emit light of different colors, comprising:
The lighting control software can display an interface on the lighting control device for selecting a light emission color of a specific chromaticity by controlling the light intensity ratio of each light-emitting element,
The interface is
an object group selection interface for selecting one of a plurality of object groups from a chromaticity region that is a part of a chromaticity range surrounded by the chromaticities of the plurality of light-emitting elements;
a chromaticity selection interface for selecting the specific chromaticity from a chromaticity range corresponding to the selected object group;
In the lighting control device, a screen of the object group selection interface is displayed;
When the object group is selected in the object group selection interface, the chromaticity selection interface screen is displayed , which displays a plurality of chromaticity options corresponding to the object group.
Lighting control software. A lighting control software that operates a lighting control device that controls a lighting device including at least a first light-emitting element, a second light-emitting element, and a third light-emitting element that emit light of different colors, comprising:
The lighting control software can display an interface on the lighting control device for selecting a light emission color of a specific chromaticity by controlling the light intensity ratio of each light-emitting element,
The interface is
an object group selection interface for selecting one of a plurality of object groups from a chromaticity region that is a part of a chromaticity range surrounded by the chromaticities of the plurality of light-emitting elements;
a chromaticity selection interface for selecting the specific chromaticity from a chromaticity range corresponding to the selected object group;
In the lighting control device, the object group selection interface and the chromaticity selection interface are displayed on one screen;
When the object group is selected in the object group selection interface, a plurality of chromaticity options corresponding to the object group are highlighted in the chromaticity selection interface .
Lighting control software. A lighting system including a lighting device including at least a first light-emitting element, a second light-emitting element, and a third light-emitting element that emit light of different colors , and a lighting control device that controls the lighting device,
the lighting system comprises lighting control software that operates the lighting control device;
The lighting control software can display an interface on the lighting control device for selecting a light emission color of a specific chromaticity by controlling the light intensity ratio of each light-emitting element,
The interface is
an object group selection interface for selecting one of a plurality of object groups from a chromaticity region that is a part of a chromaticity range surrounded by the chromaticities of the plurality of light-emitting elements;
a chromaticity selection interface for selecting the specific chromaticity from a chromaticity range corresponding to the selected object group;
the chromaticity regions corresponding to the plurality of object groups overlap;
Lighting system. A lighting system including a lighting device including at least a first light-emitting element, a second light-emitting element, and a third light-emitting element that emit light of different colors, and a lighting control device that controls the lighting device,
the lighting system comprises lighting control software that operates the lighting control device;
The lighting control software can display an interface on the lighting control device for selecting a light emission color of a specific chromaticity by controlling the light intensity ratio of each light-emitting element,
The interface is
an object group selection interface for selecting one of a plurality of object groups from a chromaticity region that is a part of a chromaticity range surrounded by the chromaticities of the plurality of light-emitting elements;
a chromaticity selection interface for selecting the specific chromaticity from a chromaticity range corresponding to the selected object group;
In the lighting control device, a screen of the object group selection interface is displayed;
When the object group is selected in the object group selection interface, the chromaticity selection interface screen is displayed , which displays a plurality of chromaticity options corresponding to the object group.
Lighting system. A lighting system including a lighting device including at least a first light-emitting element, a second light-emitting element, and a third light-emitting element that emit light of different colors, and a lighting control device that controls the lighting device,
the lighting system comprises lighting control software that operates the lighting control device;
The lighting control software can display an interface on the lighting control device for selecting a light emission color of a specific chromaticity by controlling the light intensity ratio of each light-emitting element,
The interface is
an object group selection interface for selecting one of a plurality of object groups from a chromaticity region that is a part of a chromaticity range surrounded by the chromaticities of the plurality of light-emitting elements;
a chromaticity selection interface for selecting the specific chromaticity from a chromaticity range corresponding to the selected object group;
In the lighting control device, the object group selection interface and the chromaticity selection interface are displayed on one screen;
When the object group is selected in the object group selection interface, a plurality of chromaticity options corresponding to the object group are highlighted in the chromaticity selection interface .
Lighting system.