JP2022123541A - Lighting device and light source - Google Patents

Abstract

To suppress color unevenness in a lighting device using a plurality of LEDs with different emission colors.SOLUTION: There is provided a light source in which multiple LEDs with three or more emission colors, including red and other colors, are arranged in a light-emitting region. An outer peripheral portion of the light-emitting region, which consists of a plurality of LEDs, has a row of two or more LEDs of the same color adjacent to each other, or a row of LEDs of the same color. The color in the row in which two or more of the same color LEDs are adjacent or in the row of the same color LEDs is a color other than red. Also, a lighting device using the light source is provided.SELECTED DRAWING: Figure 3

Description

TECHNICAL FIELD The present invention relates to a lighting device and a light source that change the color of illumination, and more particularly to a light source using three LEDs with different emission colors and a lighting device using the light source.

With the spread of LED lighting using small-sized LEDs, it has become possible to easily realize a lighting device that can freely change colors by mixing two or three colors of LEDs. Color-tunable lighting equipment mimics the changes in natural colors, such as the bluish-white light of the blue sky during the day and the red light of the setting sun in the evening, and can create light that matches the natural biorhythms of humans. It is thought that it can contribute to improving the efficiency of the body, relaxing, and improving the quality of sleep, which in turn contributes to improving human health.

As a method of toning, it is common to use two white light sources with a high color temperature and a low color temperature and change the brightness ratio, but there are also examples of using light sources with three or more emitted colors. be. At that time, color unevenness may occur due to the use of LEDs of a plurality of colors.

In the spotlight illumination device described in Patent Document 1, since the light emitting area is enlarged and the object is irradiated, unless the arrangement pattern of the LED chips is devised, the irradiation light to the object becomes mottled multicolored light. problem is said to arise. Therefore, the LED chips in the light emitting region are mounted at a high density of several millimeters or less, and the LED chips are arranged in a pattern in which the LED chips of three colors are arranged point-symmetrically with respect to the center point of the light emitting region. It is said that it is devised so that it can irradiate uniform polychromatic light.

In Patent Document 2, as LEDs, a first group using phosphors, a second group (blue) of solid-state light emitters, and a third group (red) of solid-state light emitters are provided, and three groups A lighting device is disclosed that can be dimmed within the chromaticity coordinates bounded by three groups of LEDs by varying the brightness of the LEDs.

FIG. 7 discloses an illumination device for toning within the chromaticity coordinates surrounded by three color LEDs (BSY1, BSY2, R, where BSY stands for blue-shifted-yellow).

JP 2019-102396 A Japanese Patent Publication No. 2013-535084 U.S. Pat. No. 8,598,809

In lighting devices such as spotlights and downlights in which LEDs of a plurality of colors are arranged in a light-emitting area, the inventors have found that color unevenness can be felt to some extent in the periphery of the illuminated area, and the problem is to reduce the effect of this. do.

The present invention is a light source in which a plurality of LEDs emitting light of three or more colors including red and other colors are arranged in a light emitting region, and the outer peripheral portion of the light emitting region composed of a plurality of LEDs has two LEDs of the same color. The color in the row in which two or more LEDs of the same color are adjacent to each other is a color other than red.

Further, the present invention provides a light source in which a plurality of LEDs emitting light of three or more colors including red and other colors are arranged in a light emitting region, and the outer peripheral portion of the light emitting region composed of the plurality of LEDs is composed of LEDs of the same color. , and the color in the row of the same color LEDs is a color other than red.

In the present invention, the red color is (0.66, 0.23), (0.423, 0.355), (0.5, 0.5) and chromaticity boundary line E in CIE1931 chromaticity coordinates. Red is the chromaticity within the enclosed range, and one of the other colors is (0.336, 0.24), (0.352, 0.44), (0.352, 0.44) in CIE1931 chromaticity coordinates. 15, 0.2) and (0.2, 0.1), including bluish white.

In the present invention, the red color is (0.66, 0.23), (0.423, 0.355), (0.5, 0.5) and chromaticity boundary line E in CIE1931 chromaticity coordinates. Red is the chromaticity of the enclosed range, and one of the other colors is (0.423, 0.355), (0.342, 0.312), (0.342, 0.312) in CIE1931 chromaticity coordinates. .352, 0.44), (0.37, 0.63), and yellow-white, which is the chromaticity range bounded by the chromaticity boundary line.

In the present invention, the number of LEDs of each color may be substantially the same.

The present invention is an illumination device comprising the light source described above, a power supply for independently driving the LEDs of the respective colors of the light source, and an optical system for irradiating the light emitted from the light source.

In the present invention, the power supply may have a slot into which a receiver can be inserted, and the receiver may receive a control signal from the outside and control the output of the power supply.

Advantageous Effects of Invention According to the present invention, it is possible to suppress color unevenness in an irradiation area in a light source using LEDs of a plurality of emission colors and a lighting device using the light source.

1A and 1B are a front view and a cross-sectional view of a lighting device according to Embodiment 1. FIG. FIG. 2 is an explanatory diagram for explaining a system including the lighting device of Embodiment 1 and irradiation of light from the lighting device; 1 is a plan view of a light source used in Embodiment 1. FIG. Chromaticity diagram for explaining the chromaticity of LEDs Plan view of the light source of Embodiment 2 Front view and cross-sectional view of the lighting device of Embodiment 3 Plan view of the CSP type light source of Embodiment 3 Variation of arrangement of LEDs in Embodiment 3

<Embodiment 1>
<Basic configuration>
FIGS. 1A and 1B respectively show a front view and a cross-sectional view of a main part of a lighting device 300 according to this embodiment. The lighting device 300 is a downlight, and the lighting body 310 includes a heat sink 315, a light source 320, a first reflector 330, a diffusion plate 335, and a second reflector 340, and a mounting frame 350 has three mounting springs 355. Prepare. In addition, "the first reflector 330, the diffuser 335, and the second reflector 340" will be referred to as an optical system.

In this description, the vertical direction of the lighting device 300 refers to the vertical direction in FIG. 1, and the vertical direction based on the direction of gravity in the installed state is not used unless otherwise specified.

FIG. 2 is an explanatory diagram for explaining a system including the illumination device 300 and light irradiation from the illumination device 300. As shown in FIG. In FIG. 2, the ceiling 380 is cut and shown for description. The lighting device 300 receives drive power from a power supply 360 , and the power supply 360 supplies drive power for independently driving the LEDs of three colors according to wireless signals from the control device 370 .

<Color unevenness>
In FIG. 2, the light of the lighting device 300 installed on the ceiling is irradiated to the irradiation area 390P of the floor surface 390, for example. Here, particularly in the irradiation area peripheral portion 390F, color unevenness may occur, and the present invention takes measures against this.

<Heat sink>
The heat sink 315 has a plurality of upward radiation fins and has a mounting portion for the light source 320 at the bottom.

<First reflector>
The first reflecting plate 330 is a reflecting plate whose reflecting surface, which is an inner surface, is subjected to uneven processing (embossing) to enhance diffuse reflection effect.

<Diffusion plate>
The diffusing plate 335 is a transparent flat plate having a roughened incident surface and an exit surface. Note that the flat plate may contain a diffusing material.

It should be noted that the radiation angle of the lighting device can be changed by using a lens instead of a flat plate for the diffusion plate. As the lens, for example, a Fresnel lens, which is a thin lens, can be used.

<Second reflector>
The second reflector 340 is a reflector having a rough reflecting surface, which is an inner surface, and having a diffuse reflection effect.

<Mounting frame and mounting spring>
The mounting frame 350 has three mounting springs 355 . The mounting frame 350 can be separated from the lamp body 310. First, the mounting frame 350 is fixed to the ceiling using a mounting spring 355, and then the lighting device 300 is attached to the ceiling by fixing the lamp body to the mounting frame 350. Attached to 380.

<Power supply and control>
The power supply 360 has 3-channel drive outputs for independently driving the three-color LEDs. A smartphone, tablet, or PC installed with lighting control software is used as the control device 370. A control signal is wirelessly transmitted to a wireless module 375, which is a receiving device, and the wireless module 375 transmits the control signal to the power supply 360. Thus, the driving outputs of 3ch of the power supply 360 are controlled respectively.

The wireless module 375 is detachable in a slot provided in the power supply 360 , and terminals of the wireless module 375 are connected to terminals in the slot of the power supply 360 .

<Light source>
A plan view of the light source 320 used in this embodiment is shown in FIG. 3 (a view of the light source 320 in the normal arrangement shown in FIG. 1 viewed from below). In the light source 320, 22 LEDs 323A, 323B, and 323C of three colors of SMD type (Surface Mount Device type, surface mount type) are arranged as shown in FIG. , are connected in series by wiring inside the substrate. The light source 320 has mounting holes 325 , and is fastened to the heat sink 315 by passing screws through the mounting holes 325 . The light source 320 has a wiring terminal 326A (for the LED 323A), a wiring terminal 326B (for the LED 323B), a wiring terminal 326C (for the LED 323C), and a wiring terminal 326E (common terminal), and is connected to a power supply 360 having three outputs. is controlled.

In this case, the arrangement of the LEDs is such that the numbers of the LEDs 323A, 323B, and 323C are the same and are evenly arranged. In addition, for the convenience of wiring the LEDs of the same color in series in the wiring inside the substrate 321, the LEDs of the same color are arranged obliquely near each other.

The light emitting region 322 has a shape with an outer peripheral portion corresponding to approximately eight sides. In FIG. 3, the north is considered as in the upper map, and NESW is indicated. It has an outer peripheral portion 322SE, an outer peripheral portion 322S of CABCAB arrangement, an outer peripheral portion 322SW of CCC arrangement, an outer peripheral portion 322W of ACBAC arrangement, and an outer peripheral portion 322NW of CBA arrangement.

In this way, although the LEDs of each color are arranged to be mixed as much as possible, there are "peripheral portion 322NE of the BBB array" and "peripheral portion 322SW of the CCC array". Therefore, in the irradiation area peripheral portion 390F in FIG. 2, the colors "B" and "C" may appear strongly.

Therefore, in the present invention, it is assumed that the color that people feel strongly is red, and colors other than "R" (red), which will be described later, are used as colors in which the same color is arranged in each peripheral portion. Specifically, the LED 323A is set to "R", and the remaining LEDs 323B and 323C are set to either "Yw" or "Bw", which will be described later.

<LED chromaticity>
As the LED 323A, the LED 323B, and the LED 323C used in this embodiment, any one of the red LED "R", the yellowish white LED "Yw", and the bluish white LED "Bw" is used. Although Yw is a color close to yellow on the chromaticity diagram, it also looks greenish white. FIG. 4 is a chromaticity diagram (CIE1931 chromaticity coordinate diagram) for explaining the chromaticity of these LEDs, and for reference, a dotted line shows a line connecting the chromaticity of black body radiation at each color temperature. .

The red LED R is (0.66, 0.23), (0.423, 0.355), (0.5, 0.5) and the chromaticity boundary line E The light is emitted with a chromaticity in the range enclosed by (0.60.0.38) as an example. Note that it is not the same as the general definition of red.

Yw, which is a yellow-white LED, is (0.423, 0.355), (0.342, 0.312), (0.352, 0.44), (0.37 , 0.63) and chromaticity in the range enclosed by the chromaticity boundary line E, for example (0.44, 0.47).

Bw, which is a blue-white LED, is (0.336, 0.24), (0.352, 0.44), (0.15, 0.2), (0.2) in the chromaticity coordinates of FIG. , 0.1), for example (0.23, 0.26).

Within the chromaticity range of Yw, a range in which d _uv is positive from a line connecting the chromaticity of black body radiation at each color temperature is preferable, and a range in which d _uv is plus 0.03 to 0 is particularly preferable.

Among the chromaticity ranges of Bw and R, a range of _+0.03 to -0.03 in duv from the line connecting the chromaticities of blackbody radiation at each color temperature is particularly preferable.

It should be noted that the chromaticity of each LED can be represented by chromaticity coordinates (u', v') in CIE1976 instead of chromaticity coordinates (x, y) in CIE1931, and both are u'=4x/(-2x+12y+3 ) and v′=9y/(−2x+12y+3). It may be displayed in another chromaticity coordinate system.

The bluish-white color Bw is not a primary color that is a color on the boundary line of chromaticity coordinates, so the color is not conspicuous. The yellow-white color Yw includes the primary color yellow, which is close to white and is inconspicuous. Therefore, in the case of the combination of these three colors, the red color is particularly conspicuous, and the effect of the present invention, which takes measures against it, is high.

<Structure of LED>
The LED 323A, LED 323B, and LED 323C used in the embodiment are provided with a package having a bottom surface and four side surfaces, terminals on the bottom surface being connected to the side surface or the bottom surface, a blue LED chip made of InGaN, and a resin containing a phosphor. be. The blue LED chip is fixed to the bottom surface of the package, the electrodes of the blue LED chip are connected to the electrodes of the package by wires or the like, and the top surface and side surfaces of the blue LED chip are covered with phosphor-containing resin. The width of the LED package is, for example, approximately 3 mm square.

The LED 323B whose emission color is Bw (hereinafter abbreviated as Bw) is an InGaN blue LED chip whose top and side surfaces are covered with resin containing greenish phosphor particles or yellowish phosphor. Moreover, red phosphor particles may be further included.

An LED 323C with an emission color of Yw (hereinafter abbreviated as Yw) has an InGaN blue LED chip arranged at the bottom of the package, and the top surface and side surfaces of the InGaN blue LED chip are coated with green phosphor particles or yellow. It is covered with a resin containing a system phosphor, but the concentration of the phosphor is higher than that of Bw. Moreover, red phosphor particles may be further included.

The LED 323A emitting light of R color (hereinafter abbreviated as R) is an InGaN blue LED chip whose top and side surfaces are covered with a resin containing red phosphor particles.

As for R, an AlGaInP-based LED chip may be used in place of the InGaN-based blue LED chip and covered with a resin containing no phosphor. An LED package using an AlGaInP-based LED chip as R is preferable in that the emission spectrum does not include blue, but the drive circuit is complicated because the drive voltage is different from Bw and Yw. In the case of an LED package in which a blue LED chip and a red phosphor are combined as R, a process for reducing the blue color included in the emission spectrum is required. For example, it is preferable to increase the concentration of the red phosphor to reduce the ratio of light emitted from the blue LED chip to the outside, but a filter that absorbs blue may be used.

In each of the LEDs described above, the yellow phosphor particles are, for example, (Y _1−x Gd _x ) ₃ Al ₅ O ₁₂ :Ce ²⁺ (0≦x≦1), and the green phosphor particles are, for example, Lu 3Al ₅ O ₁₂ :Ce ²⁺ , red phosphors such as Sr _x Ca _1−x AlSiN ₃ :Eu ³⁺ (0≦x≦1) phosphors, Sr[ _{LiAl 3 N 4} ]:Eu ²⁺ and K ₂ SiF ₆ :Mn ⁴⁺ phosphor can be preferably used. Quantum dots can also be suitably used.

<Embodiment 2>
<Basic configuration>
A lighting device 400 (downlight) according to the present embodiment is obtained by replacing the light source 320 in the lighting device 400 with a light source 420 having a different number of LEDs.

<Light source>
A plan view of light source 420 is shown in FIG. The light source 420 has three color SMD (Surface Mount Device type, surface mount type) LEDs 423A, 423B, and 16 LEDs 423C arranged as shown in FIG. They are connected in series by wiring inside the substrate. The light source 420 is provided with a mounting hole 425 and fastened to the heat sink 315 by passing a screw through the mounting hole 425 . The light source 420 has a wiring terminal 426A (for LED 323A), a wiring terminal 426B (for LED 323B), a wiring terminal 426C (for LED 323C), and a wiring terminal 426E (common terminal), and is connected to a power supply 460 having three outputs. is controlled.

The light emitting region 422 has a shape with an outer peripheral portion corresponding to approximately eight sides. The LEDs are arranged in a BCAB outer peripheral portion 422N, a BBA outer peripheral portion 422NE, an ACBA outer peripheral portion 422E, an ABC outer peripheral portion 422SE, a CABC outer peripheral portion 422S, an ACC outer peripheral portion 422SW, and an ACBA outer peripheral portion. It has a portion 422W and an ACB array peripheral portion 422NW.

In this way, although the LEDs of each color are arranged in a mixed manner as much as possible, there are the "peripheral part 422NE of the BBA arrangement" and the "peripheral part 422SW of the ACC arrangement" in which two LEDs of the same color are arranged. Therefore, in the portion corresponding to the irradiation area peripheral portion 390F in FIG. 2, the colors “B” and “C” may appear strongly. In the present embodiment, when two adjacent ones arranged at the outermost periphery have the same color, the color is prevented from becoming red (R), which is a visually conspicuous color. In other words, the B and C LEDs in which BB and CC are aligned are colored other than red (R), that is, bluish white (Bw) or yellowish white (Yw).

<Embodiment 3>
<Basic configuration>
A front view and a cross-sectional view of a lighting device 300 (downlight) according to this embodiment are shown in FIGS. 6(a) and 6(b), respectively. It comprises a lamp body 510 , a heat sink 515 , a light source 520 , a tube 530 , a lens 535 , a cone 540 and a mounting frame 550 . A mounting spring 555 is attached to the mounting frame 550 . Note that "the lens 535 and the cone 540" are called an optical system.

The lighting device 500 is supplied with drive power from a power supply 560 (which has three independent drive outputs similar to the power supply 360 ) (not shown), and a control device 370 controls the drive output of the LED.

<Light source>
The light source 520 used in this embodiment is a COB (Chip On Board) type, and a CSP (Chip Scale Package) type LED 523 of about 1 mm square is arranged in a light emitting region 522 thereon. This plan view is shown in FIG.

The light source 520 has 24 LEDs 523A, 523B, and 523C of three colors arranged in a light-emitting area 522 on a substrate 521 formed by forming an insulating film and a wiring pattern on an aluminum plate as shown in FIG. They are connected in series by wiring inside the substrate. The substrate 521 has mounting holes 525 through which screws are passed to fasten to the heat sink 410 (which is smaller than the heat sink 315). A power supply 560 having three outputs and having a wiring terminal 526A (for LED 523A), a wiring terminal 526B (for LED 523B), a wiring terminal 526C (for LED 523C), and a wiring terminal 526E (common terminal) (the rated output is different from that of the power supply 360). are connected to each other, and the light emission of each LED is controlled by dimming.

The arrangement of the LEDs is such that the numbers of the LEDs 523A, 523A, 523B, and 523C are almost the same and are evenly arranged. Rows from +4 to -4 are shown on the left. Rows +1 to -1 are arranged in a grid (rectangular arrangement), rows +4 to +1, and rows -1 to -4 are arranged in a grid that is shifted by half. is doing. The same color, such as "AAAA", is not arranged in the same row or column. The diameter of the light emitting region is approximately 10 mm.

Attention is paid to the arrangement of the CSP type LEDs (abbreviated as A, B, and C) of each color in each outer peripheral portion of the light emitting region 522 surrounded by the dotted line of the octagon. The outer peripheral portion 522N is CABCA, the outer peripheral portion 522NE is ACBC, the outer peripheral portion 522E is CAB, the outer peripheral portion 522S is BBBB, the outer peripheral portion 522S is ABCAB, the outer peripheral portion 522SW is BCBA, the outer peripheral portion 522W is CAB, and the outer peripheral portion 522NE is CCCC. ing.

In this embodiment, the red LED "R" is used as the LED 523A, and either the blue-white LED "Bw" or the yellow-white LED "Yw" is used as the LEDs 523B and 523C. Therefore, although the same color CSPs are arranged in the outer peripheral portion 522NW and the outer peripheral portion 522SE, none of them are red (A), and color unevenness is less noticeable in the peripheral portion of the irradiation region where the light emitting region is projected to some extent.

The outer peripheral portion 422SW is a row of "BBBA", and three CSPs of the same color are lined up. However, since a plurality of red (A) are not lined up, the color unevenness is similarly inconspicuous.

<CSP type LED>
The LED 523A, LED 523B, and LED 523C include a blue LED chip made of InGaN and a resin containing a phosphor that covers the sides and top of the blue LED chip. is generally not provided. Electrodes are exposed from the bottom surface of the blue LED chip.

<Variations regarding light emitting area>
FIG. 8 shows a variation of the arrangement of the LEDs in the light emitting region of the light source 520 of Embodiment 3, in which the gaps between the LEDs are adjusted so that the outer periphery becomes a circle. Even in such an arrangement, it is possible to extract the outer peripheral portion 522SE' in which the arrangement of LEDs is BBBB and the outer peripheral portion 522NW' in which the arrangement of LEDs is CCCC. In other words, the peripheral portion can be extracted as a row of LEDs even if it is not a linear side.

<Provisions and Variations>
(1) In the present application, an LED includes an LED chip, which is a semiconductor chip, as a component and refers to an LED package or a CSP type LED having a single emission color, but it may be only an LED chip, which is a semiconductor chip. . In general, a light source provided with an LED or an entire illumination device may be referred to as an LED, but the term LED is not used in this sense in the present application.

(2) The light source using LEDs of a plurality of colors may be a light source using not only LEDs of three colors but also LEDs of four or more colors.

(3) As the three-color LED, the red (R), yellow-white (Yw), and bluish-white (Bw) examples have been described, but other three-color LEDs including red may be used. For example, R, Yw, and blue (B) (LEDs with chromaticity coordinates of x≦0.2 and y≦0.2) may be used. Three LEDs of R, green (G) (LEDs with chromaticity coordinates x≦0.35, y≧0.4), and blue (B) may be used. All of R, G, and B are primary colors, but among them, R is the most conspicuous color. Also, R, G, and B may be combined with white (for example, daylight white LEDs or daylight LEDs).

(4) If the number of LEDs used as a light source is such that there is a "peripheral portion where a plurality of LEDs of the same color are arranged", it is covered by the present application. A single row LED arrangement is not the subject of this application.

(5) As the regular arrangement of the LEDs, a lattice arrangement, a triangular arrangement, a lattice arrangement in which some rows are shifted, and an arrangement with a circular outer circumference based on them are shown, but the arrangement is not limited to this.

(6) In Embodiment 1, the outer peripheral portion of the light emitting region of the light source is an octagonal outer peripheral portion. 12 or the like is appropriately extracted, and it is determined whether the outer peripheral portion has a plurality of LEDs of the same color or is composed of LEDs of the same color.

(7) In the above embodiments, the number of LEDs of each color is the same.・When the number of LEDs of high/medium or medium/low color differs by 1 or 2 between 24 and 22, or when the number of LEDs is large, the number of LEDs of the same color increases or decreases by about 10% from the average number. However, it can be treated as “almost the same number”. If the number of LEDs is approximately the same, LEDs of the same color are more likely to line up in the outer peripheral portion.

(8) Any optical system may be used as long as it affects the emission of light from the light source in the illumination device, and includes lenses, diffusers, reflectors, filters, and the like.

(9) As a lighting device, an example of a ceiling-mounted downlight is shown, but lighting devices such as spotlights and universal (variable direction) downlights that place multiple LEDs in a certain area are also targeted. It is good if it becomes.

(10) As a control method of the lighting device, an example of wireless control has been shown, but wired control may be used.

It should be noted that the above-described embodiment disclosed this time is an example in all respects and does not serve as a basis for restrictive interpretation. Therefore, the technical scope of the present invention is not to be interpreted only by the above-described embodiments, but is defined based on the claims. In addition, all changes within the meaning and range of equivalents to the scope of claims are included.

300, 400, 500 lighting devices 310, 510 lamp bodies 315, 515 heat sinks 320, 420, 520 light sources 321, 421, 521 substrates 322, 422, 522 light emitting regions 322E, 322N, 322NE, 322NW, 322S, 322SE, 322SW, 322W , 422E, 422N, 422NE, 422NW, 422S, 422SE, 422SW, 422W, 522E, 522N, 522NE, 522NW, 522S, 522SE, 522SW, 522W Outer peripheral portion 323A, 323B, 323C, 423A, 423B, 423C, 523B, 523A, 523A 523C LEDs
325, 425, 525 Mounting holes 326A, 326B, 326C, 326E, 426A, 426B, 426C, 426E, 526A, 526B, 526C, 526E Wiring terminal 330 First reflector 335 Diffusion plate 340 Second reflectors 350, 550 Mounting frame 355, 555 Mounting springs 360, 460, 560 Power supply 370 Control device 375 Wireless module 380 Ceiling 390 Floor surface 390F Irradiation area peripheral part 390P Irradiation area 530 Tube 535 Lens 540 Cone

Claims (7)

A light source in which a plurality of LEDs emitting light of three or more colors including red and other colors are arranged in a light emitting region,
The outer peripheral portion of the light emitting region, which consists of a plurality of LEDs, has a row in which two or more LEDs of the same color are adjacent to each other,
The color in the row in which two or more of the same color LEDs are adjacent is a color other than red.
light source. A light source in which a plurality of LEDs emitting light of three or more colors including red and other colors are arranged in a light emitting region,
The outer peripheral portion of the light emitting region, which is composed of a plurality of LEDs, is composed of rows of LEDs of the same color,
The color in the row of the same color LED is a color other than red,
light source. The red color is (0.66, 0.23), (0.423, 0.355), (0.5, 0.5) in the CIE 1931 chromaticity coordinates and the range surrounded by the chromaticity boundary line E chromaticity red,
One of the other colors is (0.336, 0.24), (0.352, 0.44), (0.15, 0.2), (0.2) in CIE1931 chromaticity coordinates. , 0.1), including blue-white,
3. A light source according to claim 1 or 2. The red color is (0.66, 0.23), (0.423, 0.355), (0.5, 0.5) in the CIE 1931 chromaticity coordinates and the range surrounded by the chromaticity boundary line E is red, which is the chromaticity,
One of the other colors is (0.423, 0.355), (0.342, 0.312), (0.352, 0.44), (0.37) in CIE1931 chromaticity coordinates. , 0.63) and yellow-white, which is the chromaticity in the range enclosed by the chromaticity boundaries.
3. A light source according to claim 1 or 2. 5. A light source as claimed in any preceding claim, wherein the number of LEDs of each color is approximately equal. a light source according to any one of claims 1 to 5;
a power source that independently drives the LEDs of each color of the light source;
A lighting device comprising an optical system for irradiating light emitted from the light source. the power supply comprises a slot into which a receiving device can be inserted;
The receiving device receives a control signal from the outside and controls the output of the power supply.
7. A lighting device according to claim 6.

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