JP2015106502A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire which has good luminous efficiency, which can enhance relative total luminous flux and which enhances color rendering properties.SOLUTION: A luminaire 1 includes a plurality of LEDs 3. The LED 3 has: an LED element 31 for emitting light; and a color conversion member 33 for covering the LED element 31. The plurality of LEDs 3 include: a first light emitting part 3A in which chromaticity points of emission light from the color conversion member 33 exist in a range of a region surrounded by chromaticity coordinates (0.27, 0.34), (0.38, 0.58), (0.45, 0.54), (0.33, 0.35), and which is formed so that an average color rendering index Ra becomes 76-30: and a second light emitting part 3B in which chromaticity points of emission light exist in a range of a region surrounded by chromaticity coordinates (0.44, 0.22), (0.35, 0.36), (0.53, 0.44), (0.60, 0.35), and which is formed so that the average color rendering index Ra becomes 79-30. The ratio of light emission intensity of the first light emitting part 3A and the second light emitting part 3B is in a range of 0.5:7.5-2.5:5.5.

Description

  The present invention relates to a lighting device using a plurality of solid state light emitting elements as a light source.

  Light emitting diodes (hereinafter referred to as LEDs) are capable of emitting light with low power and high luminance, and are used as light sources for various electric devices such as displays and lighting equipment. In recent years, blue LEDs have been put into practical use in addition to red LEDs and green LEDs, and by combining these RGB three-color LEDs, various light colors can be emitted. In addition, a blue LED is coated with a color conversion member containing a yellow phosphor that converts the wavelength of blue light to emit yellow light, and white light is emitted by mixing light of blue light and yellow light. It has been known.

  As a typical yellow phosphor used in the white LED, a YAG phosphor is known. A white LED obtained by coating a blue LED with a color conversion member containing a YAG-based phosphor has a small red light component in the spectral spectrum, and thus has a high correlated color temperature and is suitable for an illumination device that emits daylight color illumination light. Used. On the other hand, an LED having a color conversion member containing a red phosphor that emits red light, such as a CASN phosphor, is suitably used for an illumination device that emits warm light bulb-colored illumination light. Further, the phosphor added to the color conversion member is not limited to the yellow phosphor and the red phosphor, and for example, a green phosphor or an orange phosphor is used in appropriate combination (for example, Patent Documents). 1).

JP 2008-115332 A

  However, according to the performance evaluation of LED lighting devices by DOE (US Department of Energy), JLEDS (LED Lighting Promotion Committee), etc., the luminous efficiency of WarmWhite (bulb) color (3000K to less than 5000K) is CoolWhite (daylight) Lower for colors (5000K-6700K). FIG. 13 shows an annual transition of luminous efficiency in an LED that emits daylight-colored illumination light (hereinafter, daylight-colored LED) and an LED that emits light-colored illumination light (hereinafter, bulb-colored LED). The luminous efficiency of the blue LED itself, which is the light source, is improving year by year, and further improvement is expected in the future. However, if the luminous efficiency of the phosphor is not improved, the difference in luminous efficiency between the daylight LED and the bulb LED is widened.

Further, in the LED illumination device using the phosphor as described above, the color rendering properties (average color rendering index Ra) and the relative total luminous flux are in a trade-off relationship. For example, as shown in FIG. 14, an LED using a color conversion member containing a YAG yellow phosphor and a SCASN red phosphor with respect to a blue LED has a high color rendering property but a low relative total luminous flux. When an orange phosphor containing Sr ₂ BaSiO ₅ : Eu as a main component is further added to this color conversion member, the relative total luminous flux is increased, but the color rendering properties are lowered. In addition, the addition rate of the orange fluorescent substance in a figure is the replacement ratio with respect to the SCASN type | system | group red fluorescent substance which is a prior art. For example, “50% orange phosphor” indicates that 50% by weight of the SCASN red phosphor is replaced with an orange phosphor. That is, when a plurality of phosphors are used for the color conversion member, it is difficult to achieve both color rendering properties and relative total luminous flux.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems, and to provide an illumination device that has high luminous efficiency, can increase the relative total luminous flux, and can improve color rendering.

  In order to solve the above-described problems, an illumination device according to the present invention includes a substrate and a plurality of LEDs disposed on the substrate, and the LEDs cover the LED elements that emit light and the LED elements. A color conversion member that converts the wavelength of the light emitted from the LED element and emits the light, and the plurality of LEDs have a chromaticity point (0.27) of the chromaticity point of the emitted light from the color conversion member. , 0.34), (0.38, 0.58), (0.45, 0.54), and (0.33, 0.35), the average color rendering index Ra Are chromaticity coordinates (0.44, 0.22), (0.35, 0), and the chromaticity point of the emitted light from the first light emitting part formed so as to be 76 to 30 and the color conversion member. 36), (0.53, 0.44), (0.60, 0.35), and the average color rendering A second light-emitting portion formed so that the number Ra is 79 to 30, and a ratio of light emission intensities of the first light-emitting portion and the second light-emitting portion is 0.5: 7.5 to It is characterized by being in the range of 2.5: 5.5.

  In the illuminating device, the second light emitting unit may be configured such that the chromaticity point of the emitted light from the color conversion member has chromaticity coordinates (0.44, 0.22), (0.40, 0, 38), ( 0.53, 0.44) and (0.60, 0.35) are preferable.

  In the illumination device, the second light emitting unit has chromaticity points (0.44, 0.22), (0.42, 0.39), (chromaticity points of light emitted from the color conversion member, 0.53, 0, 44) and (0.60, 0.35) are preferable.

  In the illumination device, the first light emitting unit has chromaticity points of light emitted from the color conversion member as chromaticity coordinates (0.32, 0.43), (0.38, 0.54), ( 0.43, 0.51) and (0.365, 0.41). The second light emitting unit is formed of a chromaticity of light emitted from the color conversion member. Range of the region in which the point is surrounded by chromaticity coordinates (0.40, 0.29), (0.42, 0.39), (0.53, 0, 44), (0.56, 0.40) It is preferable that it is formed so that it exists.

  In the illumination device, the first light emitting unit has chromaticity points of light emitted from the color conversion member having chromaticity coordinates (0.32, 0.43), (0.36, 0.50), ( 0.41, 0.48) and (0.365, 0.41). The second light emitting unit is formed of a chromaticity of light emitted from the color conversion member. Range of the region in which the point is surrounded by chromaticity coordinates (0.40, 0.29), (0.42, 0.39), (0.53, 0, 44), (0.56, 0.40) It is preferable that it exists in.

  Moreover, this invention is an illuminating device provided with the board | substrate and several LED arrange | positioned on the said board | substrate, Comprising: The said LED is the LED element which radiate | emits light, and covers the said LED element, This LED element A color conversion member that converts the wavelength of the emitted light and emits the light, and the plurality of LEDs have chromaticity coordinates (0.36, 0. 43) and (0.39, 0.45), the first light emitting portion formed so that the average color rendering index Ra is 76 to 30 in the range of chromaticity deviation ± 0.04 from the locus connecting (0.39, 0.45) When the chromaticity point of the emitted light from the color conversion member is in the range of chromaticity deviation ± 0.04 with the chromaticity coordinate ((0.49, 0.41) as the center, average color rendering evaluation A second light emitting portion formed so that the number Ra is 79 to 30, the first light emitting portion and the second light emitting portion. The ratio of the emission intensity of the light part may be in the range of 0.5: 7.5 to 2.5: 5.5.

In the illumination device, the first light emitting unit includes a YAG yellow phosphor in the color conversion member, and the second light emitting unit includes a YAG yellow phosphor in the color conversion member and Sr ₂ BaSiO _5. : It is preferable to contain an orange phosphor mainly composed of Eu.

  In the illumination device, in the second light emitting unit, the orange phosphor is preferably in the range of 3 to 50 weight percent of the entire phosphor contained in the color conversion member.

  In the lighting device, it is preferable that the second light emitting unit is disposed on the substrate so as to surround the first light emitting unit.

  According to the present invention, the second light emitting unit suppresses the decrease in the light emission efficiency, and the first light emitting unit improves the color rendering, so that the light emission efficiency is high and the relative total luminous flux can be increased, and the color rendering property. Can be high.

The perspective view of the illuminating device which concerns on one Embodiment of this invention. (A) is a sectional side view of the 1st light emission part used for the illumination device, (b) is a sectional side view of the 2nd light emission part of the illumination device. The chromaticity diagram which shows an example of the chromaticity of the emitted light from each light emission part of the illumination device. The chromaticity diagram which shows the more preferable example of the chromaticity of the emitted light from each light emission part of the same illuminating device. The chromaticity diagram which shows the more preferable example of the chromaticity of the emitted light from each light emission part of the same illuminating device. The chromaticity diagram which shows the more preferable example of the chromaticity of the emitted light from each light emission part of the same illuminating device. The chromaticity diagram which shows the more preferable example of the chromaticity of the emitted light from each light emission part of the same illuminating device. The chromaticity diagram which shows the other examples of chromaticity of the emitted light from each light emission part of the illumination device. The figure which shows the spectrum of the emitted light from each said light emission part. The chromaticity diagram which shows the change of chromaticity when the emitted light intensity of each said light emission part is changed. The figure which shows the spectral spectrum of the emitted light from each said light emission part (bulb-color LED) and the emitted light from the conventional bulb-color LED. The figure which shows the relationship between the emitted light from each said light emission part (bulb color LED), the average color rendering evaluation number of the emitted light from the conventional light bulb color LED, and a relative total luminous flux. The figure which shows the annual transition of the luminous efficiency of the conventional daylight color illumination and light bulb color illumination. The figure which shows the relationship between the average color rendering index of the emitted light from the conventional light bulb color LED, and a relative total luminous flux.

  An illumination device according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the illumination device 1 of the present embodiment includes a substrate 2 and a plurality of LEDs 3 arranged on the substrate 2. The lighting device 1 includes a cylindrical housing 4 having an opening 40 and a die casting member 5 that is provided on the bottom surface 41 of the housing 4 and holds the substrate 2. The opening 40 is provided with a diffusion member (not shown) that diffuses the light emitted from each LED 3 and radiates the light to the outside. The die-cast member 5 is smaller than the inner periphery of the bottom surface 41 of the housing 4 and has a hole (not shown) or the like for inserting a wiring connected to the substrate 2. Moreover, the illuminating device 1 is provided with the drive driver (not shown) which carries out the lighting drive of LED3, respectively.

  The board | substrate 2 is a rectangular flat plate, and the electrode pad for mounting several LED3 and the circuit board (not shown) for electric power feeding are formed. A fixing portion for inserting a screw 6 is provided at an end portion of the substrate 2, and the substrate 2 is fixed to the die casting member 5 and the housing 4 via the screw 6. In this example, a total of eight LEDs 3 are mounted on the substrate 2. These LEDs 3 are composed of a combination of two types of LEDs (first light emitting unit 3A and second light emitting unit 3B) having different emission colors, one first light emitting unit 3A and seven second light emitting units. The light emitting unit 3B is used.

  As shown in FIG. 3A, the first light emitting unit 3 </ b> A (LED 3) includes a base material 30 having a rectangular cross section, an LED element 31 mounted on the base material 30, and a recess surrounding the LED element 31. And a color conversion member 33 (first color conversion member 33A) filled in the frame 32. The base material of the color conversion member 33 is made of a translucent resin such as a silicone resin, and contains a phosphor 34 (YAG yellow phosphor 34Y) that converts the wavelength of light emitted from the LED element 31.

  A cathode electrode 35 is provided on one side surface of the base material 30 and an anode electrode 36 is provided on the other side surface in the form of a lead frame, which is connected to external connection electrodes 37 and 38 formed at both ends of the lower surface of the base material 30. The Further, the cathode electrode 35 and the anode electrode 36 are connected to respective electrode terminals (not shown) of the LED element 31 by wires 39.

As the LED element 31, a blue-violet light emitting element having a peak wavelength of violet blue (380 to 470 nm) is preferably used. For the blue-violet light emitting element, an InGaN-based blue LED chip (for example, manufactured by Nichia Corporation, Toyoda Gosei, Epistar, Mitsubishi Chemical, etc.) or the like is used. The LED element 31 using this blue-violet light emitting element has a peak wavelength in a purple-blue (380 to 470 nm) wavelength band, and excites the phosphor 34 with high efficiency.

As shown in FIG. 3B, the second light emitting unit 3B includes, in addition to the YAG yellow phosphor 34Y, the color conversion member 33 (second color conversion member 33B), Sr ₂ BaSiO ₅ : An orange phosphor 34O containing Eu as a main component and a SCASN red phosphor 34R are contained. The surface of these phosphors is preferably coated with a thin film. The first light emitting unit 3A described above does not include the orange phosphor 34O and the red phosphor 34R.

  As described above, the first light emitting unit 3A and the second light emitting unit 3B have the chromaticity of the emitted light from each color converting member 33 by appropriately adjusting the type and addition amount of the phosphor of the color converting member. Each point is set. Specifically, as shown in FIG. 3, the first light emitting unit 3 </ b> A has chromaticity points of emitted light with chromaticity coordinates (0.27, 0.34), (0.38, 0.58), In the range of the region surrounded by (0.45, 0.54) and (0.33, 0.35), the average color rendering index Ra is 76-30. In the second light emitting unit 3B, the chromaticity point of the emitted light has chromaticity coordinates (0.44, 0.22), (0.35, 0, 36), (0.53, 0.44), In the range of the area surrounded by (0.60, 0.35), the average color rendering index Ra is 79 to 30. By setting the chromaticity of each emitted light of the first light emitting unit 3A and the second light emitting unit 3B to be within the above chromaticity range, a desired color rendering is achieved in white, warm white, and light bulb color. Can be realized. The average color rendering index Ra of the first light emitting unit 3A is more preferably 76 to 60, and the average color rendering index Ra of the second light emitting unit 3B is more preferably 79 to 60.

  Also, in the warm white and light bulb color, desirably, as shown in FIG. 4, the second light emitting unit 3B has a chromaticity point (0.44, 0.22), ( 0.40,0,38), (0.53,0.44), and (0.60,0.35). Desirably, in the light color of the light bulb, as shown in FIG. 5, the second light emitting unit 3B has chromaticity coordinates (0.44, 0.22), (0.42) of the chromaticity point of the emitted light. , 0.39), (0.53, 0, 44), and (0.60, 0.35).

  More preferably, in the light color of the light bulb, as shown in FIG. 6, in the first light emitting unit 3A, the chromaticity point of the emitted light has chromaticity coordinates (0.32, 0.43), (0. 38, 0.54), (0.43, 0.51), and (0.365, 0.41). At this time, in the second light emitting unit 3B, the chromaticity point of the emitted light has chromaticity coordinates (0.40, 0.29), (0.42, 0.39), (0.53, 0, 44). , (0.56, 0.40). By setting the chromaticity of each emitted light of the first light emitting unit 3A and the second light emitting unit 3B to be within the above chromaticity range, the light color of the light bulb is efficient and desirable color rendering is achieved. Can be realized.

  Further, as shown in FIG. 7, in the first light emitting unit 3A, the chromaticity point of the emitted light has chromaticity coordinates (0.32, 0.43), (0.36, 0.50), (0. 41, 0.48) and (0.365, 0.41). At this time, in the second light emitting unit 3B, the chromaticity point of the emitted light has chromaticity coordinates (0.40, 0.29), (0.42, 0.39), (0.53, 0, 44). , (0.56, 0.40).

  As another example, as shown in FIG. 8, the first light emitting unit 3A has a chromaticity deviation of ± 0. 0 from the locus connecting (0.36, 0.43) and (0.39, 0.45). It is formed to be in the 04 range. At this time, the second light emitting unit 3B is formed to have a chromaticity deviation of ± 0.04 with (0.49, 0.40) as the center.

  In the present embodiment, as shown in FIG. 1, one first light emitting unit 3A and seven second light emitting units 3B are used. FIG. 9 shows spectral spectra when the first light emitting unit 3A and the second light emitting unit 3B are turned on under these conditions and when all of them are turned on. In this example, the average color rendering index Ra of the first light emitting unit 3A (1 unit) was 74. The average color rendering index Ra of the second light emitting units 3B (seven) was 76. On the other hand, when a total of eight light emitting units 3A and 3B are turned on, the relative intensity is more affected by the light from the first light emitting unit 3A than in the case of the seven light emitting units 3B. Becomes higher, and the peak wavelength shifts to the lower wavelength side. The average color rendering index Ra at this time was 80. That is, by simultaneously lighting two types of light emitting units having a relatively low average color rendering index Ra, the color rendering can be improved as compared with the case where they are individually lit.

  FIG. 10 shows the chromaticity of the mixed color light when the emission intensity of the first light emitting unit 3A and the second light emitting unit 3B is changed. A region La in the drawing shows a chromaticity range of the light bulb color standard, and a region Lb shows a more preferable chromaticity range even in the light bulb color standard. From these results, the ratio of the emission intensity of the first light emitting part 3A and the second light emitting part 3B is preferably in the range of 0.5: 7.5 to 2.5: 5.5. It turns out that it is more preferable to exist in the range of 7-2: 6. If it is this range, more preferable light bulb color illumination light can be obtained. In particular, as shown in the above embodiment, when the ratio of the light emission intensity of the first light emitting unit 3A and the second light emitting unit 3B is 1: 7, the chromaticity is close to the black body radiation locus and is more natural. Light bulb-colored illumination light can be obtained.

  FIG. 11 shows a conventional light bulb color LED using a YAG yellow phosphor and a SCASN red phosphor as the phosphor, and the present embodiment (first light emitting unit 3A: second light emitting unit 3B = 1: 7). The light bulb color LED and the spectral spectrum as the target value are shown respectively. In the light bulb color LED according to the present embodiment, the light emission intensity is 120% or more and exceeds the target value as compared with the conventional light bulb color LED.

In addition, the average color rendering index Ra of the conventional light bulb color LED and the light bulb color LED of the present embodiment exceeds 80, and satisfies the color rendering properties required for the lighting device. On the other hand, the relative total luminous flux of the light bulb color LED of this embodiment was 120% of the conventional light bulb color LED. In addition, as shown in FIG. 12, in the case where an orange phosphor 34O containing Sr ₂ BaSiO ₅ : Eu as a main component is added to the YAG yellow phosphor 34Y and the SCASN red phosphor 34R (each connected by a curve) Compared to the plot), both the color rendering properties and the total luminous flux were improved. In addition,% in a figure is the replacement ratio of the orange fluorescent substance 34O with respect to SCASN type | system | group red fluorescent substance 34R.

When a plurality of phosphors are contained in the color conversion member, the phosphor that emits light on the long wavelength side absorbs the light emitted on the short wavelength side and converts the wavelength to the long wavelength side, thereby improving the luminous efficiency. descend. That is, in the conventional light bulb color LED (YAG yellow phosphor and SCASN red phosphor) shown in FIG. 12, the light emission efficiency is reduced by the wavelength conversion by the SCASN red phosphor. On the other hand, in the present embodiment, the second light emitting unit 3B using the orange phosphor 34O containing Sr ₂ BaSiO ₅ : Eu as a main component suppresses a decrease in light emission efficiency due to the SCASN red phosphor 34R. can do. In addition, the color rendering properties are improved by using the first light emitting unit 3A using the YAG yellow phosphor 34Y. Therefore, the luminous efficiency is good, the relative total luminous flux can be increased, and the color rendering properties can be increased.

  Further, in the second light emitting unit 3B, the orange phosphor 34O (see FIG. 2B) is preferably added to the color conversion member 33 in the range of 3 to 50 weight percent of the entire phosphor. . Within this range, the total luminous flux can be increased in a well-balanced manner while suppressing a decrease in color rendering.

  Moreover, in the illuminating device 1, it is preferable that the 2nd light emission part 3B is arrange | positioned on the board | substrate 2 so that 3 A of 1st light emission parts may be enclosed (refer said FIG. 1). The second light emitting unit 3B and the first light emitting unit 3A have different light colors of emitted light, but in the present embodiment, the first light emitting unit 3A is more than the second light emitting unit 3B having a larger number. Since the light emitted from the first light emitting unit 3A is mixed with the light emitted from the second light emitting unit 3B, the color unevenness can be suppressed.

  In addition, this invention is not restricted to the said embodiment, A various deformation | transformation is possible. In the said embodiment, it demonstrated based on the structure whose presence ratio of 3 A of 1st light emission parts and the 2nd light emission part 3B is 1: 7 among several LED3. However, if the ratio of the emission intensity of the first light emitting unit 3A and the second light emitting unit 3B can be in the range of 0.5: 7.5 to 2.5: 5.5, the presence ratio of the LED 3 is not necessarily the above. It may not be the street. For example, the light emission intensity is controlled by controlling the output ratio of the first light emitting unit 3A and the second light emitting unit 3B or by controlling the light emitting areas of the first light emitting unit 3A and the second light emitting unit 3B. The ratio can be set.

1 Lighting device 2 Substrate 3 LED
3A the first light emitting portion 3B the second light emitting portion 33 color conversion member 34 phosphor 34Y YAG-based yellow phosphor 34R SCASN based red phosphor 34O Sr ₂ BaSiO _5: orange phosphor mainly composed of Eu

Claims (9)

A lighting device comprising a substrate and a plurality of LEDs arranged on the substrate,
The LED includes an LED element that emits light, and a color conversion member that covers the LED element and converts the wavelength of the light emitted by the LED element and emits the light.
The plurality of LEDs are:
The chromaticity points of the emitted light from the color conversion member are chromaticity coordinates (0.27, 0.34), (0.38, 0.58), (0.45, 0.54), (0.33). , 0.35), and a first light-emitting portion formed such that the average color rendering index Ra is 76 to 30,
The chromaticity points of the light emitted from the color conversion member are chromaticity coordinates (0.44, 0.22), (0.35, 0, 36), (0.53, 0.44), (0.60). , 0.35), and a second light emitting unit formed so that the average color rendering index Ra is 79 to 30,
A lighting device, wherein a ratio of emission intensity of the first light emitting unit and the second light emitting unit is in a range of 0.5: 7.5 to 2.5: 5.5.   In the second light emitting unit, the chromaticity points of the light emitted from the color conversion member are chromaticity coordinates (0.44, 0.22), (0.40, 0, 38), (0.53, 0). .44), (0.60, 0.35), the illumination device according to claim 1, wherein the illumination device is formed so as to be in a range of an area surrounded by (0.60, 0.35).   In the second light emitting unit, the chromaticity points of the emitted light from the color conversion member are chromaticity coordinates (0.44, 0.22), (0.42, 0.39), (0.53, 0). , 44), (0.60, 0.35), the illumination device according to claim 1 or 2, wherein the illumination device is formed so as to be in a range of a region. In the first light emitting unit, the chromaticity points of the emitted light from the color conversion member are chromaticity coordinates (0.32, 0.43), (0.38, 0.54), (0.43, 0). .51), (0.365, 0.41).
In the second light emitting unit, the chromaticity points of the light emitted from the color conversion member are chromaticity coordinates (0.40, 0.29), (0.42, 0.39), (0.53, 0). , 44), (0.56, 0.40), the illumination device according to any one of claims 1 to 3, wherein the illumination device is formed in a range of a region. In the first light emitting unit, the chromaticity points of the emitted light from the color conversion member are chromaticity coordinates (0.32, 0.43), (0.36, 0.50), (0.41,0). .48) and (0.365, 0.41)
In the second light emitting unit, the chromaticity points of the light emitted from the color conversion member are chromaticity coordinates (0.40, 0.29), (0.42, 0.39), (0.53, 0). , 44), (0.56, 0.40), the illumination device according to any one of claims 1 to 4, which is in a range of a region. A lighting device comprising a substrate and a plurality of LEDs arranged on the substrate,
The LED includes an LED element that emits light, and a color conversion member that covers the LED element and converts the wavelength of the light emitted by the LED element and emits the light.
The plurality of LEDs are:
The chromaticity point of the emitted light from the color conversion member is within the range of chromaticity deviation ± 0.04 from the locus connecting the chromaticity coordinates (0.36, 0.43) and (0.39, 0.45). A first light emitting portion formed such that the average color rendering index Ra is 76 to 30,
When the chromaticity point of the emitted light from the color conversion member is in the range of chromaticity deviation ± 0.04 with the chromaticity coordinate ((0.49, 0.41) as the center, the average color rendering index Ra Having a second light emitting part formed so as to be 79-30,
A lighting device, wherein a ratio of emission intensity of the first light emitting unit and the second light emitting unit is in a range of 0.5: 7.5 to 2.5: 5.5. The first light emitting unit includes a YAG yellow phosphor in the color conversion member,
The second light-emitting portion includes a YAG yellow phosphor and an orange phosphor mainly composed of Sr ₂ BaSiO ₅ : Eu in the color conversion member. The lighting device according to any one of the above.   In the said 2nd light emission part, the said orange fluorescent substance is the range of 3 to 50 weight% among the whole fluorescent substance contained in the said color conversion member, The illuminating device of Claim 7 characterized by the above-mentioned.   The lighting device according to any one of claims 1 to 8, wherein the second light emitting unit is disposed on the substrate so as to surround the first light emitting unit.