CN204717399U - Lighting device - Google Patents

Abstract

The utility model provides a lighting device. The lighting device (10) includes a white light source (18W) and a blue-green light source (18C) with a peak wavelength in the region of 490nm to 520nm; The ratio of the luminous flux of the light source (18W) is 30% or less. The utility model can improve the color reproducibility of the object to be illuminated even when a television camera is used to shoot and play.

Description

lighting device

technical field

Embodiments of the utility model relate to a lighting device and a lighting space design method for improving color reproducibility.

Background technique

In the past, for lighting devices such as floodlights used in arenas, in order to illuminate a distant object to be irradiated with sufficient brightness, high-intensity discharge (high-intensity discharge ( High Intensity Discharge, HID) lamp (high intensity discharge lamp). On the other hand, recently, instead of HID lamps, high-efficiency light-emitting elements such as light-emitting diodes (Light Emitting Diodes, LEDs), which can expect long life and energy saving, are being used as light sources.

However, in general, high-efficiency light-emitting elements have poor color reproducibility, and an object to be illuminated by a lighting device using a high-efficiency light-emitting element not only looks unnatural in color in the arena, but also looks unnatural when viewed by a television camera (television). camera) to shoot the lighting object and play it back, the color reproducibility of the image projected on the TV after receiving and broadcasting may also be poor.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2013-114916

Utility model content

[Problems to be solved by the utility model]

The problem to be solved by the utility model is to provide a lighting device and a lighting space design method, the lighting device can improve the color reproducibility of the lighting object even when a TV camera is used to shoot and play.

[Technical means to solve the problem]

An illumination device according to an embodiment includes a white light source and a blue-green light source having a peak wavelength in a region of 490 nm to 520 nm. The ratio of the luminous flux of the cyan light source to the luminous flux of the white light source is 30% or less.

The lighting device of the embodiment includes: a white light source with a correlated color temperature of 3000K to 6500K; and a second light source that emits light satisfying 0.08≤x≤0.21 and 0.27≤y≤0.72 on the xy chromaticity diagram, and the second light source The ratio of the luminous flux to the luminous flux of the white light source is 30% or less.

In addition, the lighting device includes: a red light source having a peak wavelength in the region of 620nm-660nm, and the total luminous flux of the blue-green light source and the red light source is more than 8% of the overall luminous flux of the lighting device.

The lighting device of the embodiment includes: a white light source with a correlated color temperature of 3000K to 6500K; a second light source that emits light that satisfies 0.08≤x≤0.21 and 0.27≤y≤0.72 on the xy chromaticity diagram; and a third light source that emits light at The light satisfying 0.48≤x≤0.72, 0.28≤y≤0.45 on the xy chromaticity diagram, and the ratio of the luminous flux of the second light source to the luminous flux of the white light source is less than 24% and the luminous flux of the third light source is relatively The ratio of luminous flux to the white light source is less than 13%.

An illumination device according to an embodiment includes: a blue light-emitting diode having a peak wavelength in a region of 400 nm to 480 nm; and a phosphor layer including a yellow phosphor and a green phosphor and covering the blue light-emitting diode, and the green phosphor The body has a peak wavelength in a region of 480 nm to 520 nm and a half value width of 50 nm or less.

In addition, the phosphor layer includes a red phosphor having a peak wavelength in a region of 600 nm to 680 nm.

(effect of utility model)

According to the present invention, improvement in color reproducibility of an object to be illuminated can be expected even when shooting and broadcasting with a television camera.

Description of drawings

Fig. 1 is a perspective view showing a lighting device according to a first embodiment.

Fig. 2 is a diagram showing a relative spectral distribution of a white light source of the lighting device according to the first embodiment.

Fig. 3 is a chromaticity diagram showing the chromaticity range of the blue-green light source of the lighting device according to the first embodiment.

4 is a diagram showing the relative spectral distribution of a white light source + a cyan light source in the lighting device according to the first embodiment.

5 is a graph showing the relationship between the luminous flux ratio of the cyan light source to the white light source, the average color rendering index Ra, the color rendering evaluation index Qa for television lighting, and the color difference of the lighting device according to the first embodiment.

6 is a diagram showing the relative spectral distribution of white light source + red light source in the lighting device according to the first embodiment.

7 is a diagram showing the relative spectral distribution of white light source + red light source + cyan light source in the lighting device according to the first embodiment.

8 is a graph showing the relationship between the luminous flux ratio of the cyan light source and the red light source relative to the white light source and the average color rendering index Ra of the lighting device according to the first embodiment.

9 is a graph showing the relationship between the luminous flux ratio of the cyan light source and the red light source relative to the white light source and the color rendering index Qa for television lighting in the lighting device according to the first embodiment.

Fig. 10 is a plan view of an arena where the lighting device according to the second embodiment is installed.

Fig. 11 is a cross-sectional view showing a light source of a lighting device according to a third embodiment.

Reference signs:

10: lighting device

10a: 1st lighting device

10b: 2nd lighting device

11: Ontology

12: Power supply unit

13: Setup Table

16: shell

17: Translucent cover

18: light source

18C: Blue-green light source (cyan light source) as the second light source

18R: Red light source as the third light source

18W: white light source

19: reflector

30: Arena

31: Venue

32: Auditorium

33: Pillars

40: Substrate

41: Blue LED

42: phosphor layer

43G: Green Phosphor

43R: red phosphor

43Y: yellow phosphor

Detailed ways

Hereinafter, a first embodiment will be described with reference to FIGS. 1 to 9 .

FIG. 1 shows a lighting device 10 . The lighting device 10 is, for example, a spotlight used in arenas. The lighting device 10 includes a main body 11 , a power supply unit 12 , and an installation stand 13 for installing the main body 11 and the power supply unit 12 .

The main body 11 has a case 16 with an open front and a translucent cover 17 that closes the front opening of the case 16 . Inside the main body 11, a plurality of light sources 18 are arranged, and a reflector 19 is arranged corresponding to each light source 18, and the reflector 19 condenses light from the light sources 18 and controls light distribution.

In the present embodiment, six light sources 18 are arranged in the peripheral portion and one light source 18 is arranged in the central portion when viewed from the front surface of the main body 11 . In addition, the light source 18 in the peripheral portion is a white light source 18W. The central light source 18 is a cyan light source (cyan light source) 18C as the second light source, or both of the cyan light source 18C and the red light source 18R as the third light source.

First, the case where the central light source 18 of the lighting device 10 is a cyan light source (cyan light source) 18C will be described.

The white light source 18W emits white light with a correlated color temperature of 3000K-6500K. The white light source 18W is a white LED having a blue LED chip as a light emitting element and a yellow phosphor covering the blue LED chip. The white light source 18W emits spectrally distributed white light obtained by mixing blue light emitted by a blue LED and yellow light emitted by a yellow phosphor excited by the blue light. 2 shows the relative spectral distribution A of the white light emitted by the white light source 18W.

The blue-green light source 18C emits the following light, the light has a peak wavelength of 490 nm to 520 nm, a half-value width of 60 nm or less, and satisfies 0.08≤x≤0.21, 0.27≤y on the xy chromaticity diagram shown in FIG. 3 ≤0.72. The cyan light source 18C is a cyan LED having the stated chromaticity and half-value width. The ratio of the luminous flux of the cyan light source 18C to the luminous flux of the white light source 18W is 30% or less. Fig. 4 shows the relative spectral distribution B, the relative spectral distribution B is in the relative spectral distribution A of Fig. 2, with the ratio of the luminous flux ratio of (white light) 90: (blue-green light) 10 mixed with dominant wavelength 500nm and half Blue-green light emitted by a blue-green light source 18C with a value width of 40 nm.

Furthermore, the power supply unit 12 supplies electric power to each light source 18 so that each light source 18 emits light.

In addition, the plurality of lighting devices 10 are installed on the upper part of the pillars erected in the arena, the roof of the arena, etc., and irradiate light into the arena.

The light irradiated from the lighting device 10 includes white light from the white light source 18W and cyan light from the cyan light source 18C, and has a relative spectral distribution B shown in FIG. 4 .

Table 1 shows the relative spectral distribution A of the white light source 18W and the relative spectral distribution B of the white light source 18W+blue-green light source 18C, the average color rendering index Ra and the color rendering evaluation index (Television Lighting Consistency Index) Qa for TV lighting are obtained respectively the result of.

Table 1

relative spectral distribution Ra Q A 82 66 B 85 90

In the relative spectral distribution B obtained by mixing white light and blue-green light, the average color rendering index Ra and the color rendering evaluation index Qa for TV lighting are both higher than those in the relative spectral distribution A of only white light. The color rendering index Qa for TV lighting has been greatly improved.

By increasing the average color rendering index Ra, it is possible to improve the color reproducibility of the observation target in the arena when viewed from a person located in the arena.

When the color rendering evaluation index Qa for TV lighting is increased, when a TV camera is used to shoot and broadcast the arena, the color reproducibility of the captured video can be improved, so it is possible to improve reception and broadcast and show on TV color reproducibility of the resulting image.

In this way, by mixing and irradiating white light and blue-green light in the lighting device 10, not only the average color rendering index Ra but also the color rendering evaluation index Qa for television lighting can be improved, and the color reproducibility of the actual observation object can be improved. and the color reproducibility of images when broadcast on TV.

Further, by setting the ratio of the luminous flux of the cyan light source 18C to the luminous flux of the white light source 18W to be 30% or less, sufficient color reproducibility can be ensured. If the ratio of the luminous flux of the cyan light source 18C to the luminous flux of the white light source 18W is greater than 30%, the ratio of the cyan light becomes too large, thereby deteriorating color reproducibility.

5 shows the relationship between the ratio of the luminous flux of the blue-green light source 18C to the luminous flux of the white light source 18W, the average color rendering index Ra, the color rendering evaluation index Qa for TV lighting, and the color difference duv on the CIE 1960 UCS chromaticity diagram. Ra and Qa are increased by mixing blue-green light, but Ra and Qa are maintained or decreased when the mixing ratio of blue-green light is about 30%. Therefore, the ratio of blue-green light is preferably 30% or less. On the other hand, according to JIS Z 8725:1999, when the color difference duv is in the range of -0.02≤duv≤0.02, it can be expressed as a correlated color temperature. If it deviates from this range, it cannot be defined as white with a correlated color temperature, so it becomes an unnatural light color with a greenish tinge on the plus side and a pinkish tinge on the minus side. In the range of the color difference duv, the average color rendering index Ra and the color rendering evaluation index Qa for television lighting exhibit good values when the ratio of the luminous flux of the blue-green light source 18C to the luminous flux of the white light source 18W is about 16% or less. scope. Considering the naturalness of light color itself, it is more desirable to set the mixing ratio of cyan to 17% or less.

Moreover, if the average color rendering index Ra becomes higher, the efficiency tends to decrease, but the efficiency of the cyan light source 18C decreases little, and high efficiency can be maintained for the lighting device 10 in which the white light source 18W and the cyan light source 18C are combined. .

Next, a case where the central light source 18 of the lighting device 10 is both the cyan light source 18C and the red light source 18R will be described. The structures and characteristics of the white light source 18W and the cyan light source 18C are as described above.

The red light source 18R emits light having a peak wavelength of 620 nm to 660 nm and satisfying 0.48≤x≤0.72 and 0.28≤y≤0.45 on the xy chromaticity diagram. The red light source 18R is a red LED having the chromaticity. In addition, the total value of the luminous flux of the cyan light source 18C and the luminous flux of the red light source 18R is 8% or more of the luminous flux of the entire lighting device. Furthermore, the luminous flux of the cyan light source 18C is greater than the luminous flux of the red light source 18R.

FIG. 6 shows the relative spectral distribution C. In the relative spectral distribution A of FIG. 2 , a red light source with a dominant wavelength of 640 nm is mixed at a ratio of luminous flux ratio of (white light) 95:(red light) 5. The red light emitted by 18R.

Fig. 7 shows the relative spectral distribution D, which is mixed in the relative spectral distribution A of Fig. 2 with the ratio of luminous flux ratio of (white light) 90: (blue-green light) 6: (red light) 4 There are blue-green light emitted by a blue-green light source 18C with a dominant wavelength of 500 nm and red light emitted by a red light source 18R with a dominant wavelength of 640 nm.

Table 2 shows the respective luminous fluxes of the white light source 18W, the cyan light source 18C, and the red light source 18R, and the luminous flux ratio of the entire lighting device. In addition, the luminous flux ratio of the cyan light source 18C and the red light source 18R may be equal to the cyan light source 18C and the red light source 18R, and the luminous flux ratio may be adjusted by a power supply unit, or may be a predetermined luminous flux ratio at full light. to adjust the respective quantities of the blue-green light source 18C and the red light source 18R.

Light irradiated from the lighting device 10 includes white light from the white light source 18W, cyan light from the cyan light source 18C, and red light from the red light source 18R, and has a relative spectral distribution D shown in FIG. 7 .

Table 2

Table 3 shows the relative spectral distribution A of the white light source 18W, the relative spectral distribution B of the white light source 18W+cyan light source 18C, the relative spectral distribution C of the white light source 18W+red light source 18R, and the relative spectral distribution of the white light source 18W+blue-green light source 18C+red light source 18R. Spectral distribution D, the results of obtaining the average color rendering index Ra and the color rendering evaluation index Qa for TV lighting respectively.

table 3

relative spectral distribution Ra Q A 82 66 B 85 90 C 93 83 D. 96 96

In the relative spectral distribution D obtained by mixing white light, blue-green light, and red light, compared with the relative spectral distribution A of only white light, both the average color rendering index Ra and the color rendering evaluation index Qa for TV lighting Both of them become significantly higher, and, compared with the relative spectral distribution B obtained by mixing white light and blue-green light, both the average color rendering index Ra and the color rendering evaluation index Qa for TV lighting become higher, especially the average The color rendering index Ra becomes significantly higher, and both the average color rendering index Ra and the color rendering evaluation index Qa for TV lighting become higher than the relative spectral distribution C obtained by mixing white light and red light. The color rendering evaluation index Qa for TV lighting becomes significantly higher.

By increasing the average color rendering index Ra, it is possible to improve the color reproducibility of the observation target in the arena when viewed from a person located in the arena.

When the color rendering evaluation index Qa for TV lighting is increased, when a TV camera is used to shoot and broadcast the arena, the color reproducibility of the captured video can be improved, so it is possible to improve reception and broadcast and show on TV color reproducibility of the resulting image.

In this way, by mixing and irradiating white light, blue-green light, and red light, the lighting device 10 can not only improve the average color rendering index Ra, but also improve the color rendering evaluation index Qa for television lighting, and can improve the color of the actual observation object. Color reproducibility and color reproducibility of images when broadcast on TV.

Further, by making the total of the luminous flux of the cyan light source 18C and the luminous flux of the red light source 18R 8% or more of the luminous flux of the entire lighting device, sufficient color reproducibility can be ensured. If the total of the luminous flux of the cyan light source 18C and the luminous flux of the red light source 18R is less than 8% of the luminous flux of the entire lighting device, the ratio of cyan light and red light will be small, and therefore color reproducibility cannot be sufficiently improved. In addition, the upper limit of the total value of the luminous flux of the cyan light source 18C and the luminous flux of the red light source 18R with respect to the luminous flux of the entire lighting device is appropriately set within the range of ensuring color reproducibility, but is preferably 25% or less.

Furthermore, by making the luminous flux of the cyan light source 18C larger than the luminous flux of the red light source 18R, the average color rendering index Ra and the color rendering evaluation index Qa for TV lighting can be improved.

Moreover, when the lighting device 10 includes the white light source 18W, the cyan light source 18C, and the red light source 18R, it is preferable that the ratio of the luminous flux of the cyan light source 18C to the luminous flux of the white light source 18W is less than 24%, and the luminous flux of the red light source 18R is less than 24%. The ratio to the luminous flux of the white light source 18W is less than 13%.

8 shows the luminous flux ratio of the blue-green light source 18C relative to the white light source 18W on the horizontal axis, and the luminous flux ratio of the red light source 18R relative to the white light source 18W on the vertical axis, indicating the average color rendering index Ra of the light mixed with each luminous flux ratio. Distribution.

9 shows the luminous flux ratio of the blue-green light source 18C relative to the white light source 18W on the horizontal axis, and the luminous flux ratio of the red light source 18R relative to the white light source 18W on the vertical axis, showing the color rendering of light mixed at each luminous flux ratio for TV lighting. Distribution of evaluation index Qa.

8 and 9, a white light source 18W with a correlated color temperature of 5000K, a cyan light source 18C with x=0.085 and y=0.587, and a red light source 18R with x=0.706 and y=0.292 are used.

Moreover, it can be seen from FIG. 8 that in order to make the average color rendering index Ra exhibit a good value of 85 or more, it is appropriate that the vertical axis is less than 13%, that is, the ratio of the luminous flux of the red light source 18R to the luminous flux of the white light source 18W is less than 13 %about.

It can be seen from FIG. 9 that in order to make the color rendering evaluation index Qa for TV lighting exhibit a good value of 85 or more, it is appropriate that the horizontal axis is less than 24%, that is, the ratio of the luminous flux of the blue-green light source 18C to the luminous flux of the white light source 18W. Less than about 24%.

Therefore, the average color rendering index Ra and the color rendering evaluation index Qa for TV lighting are both good for the lighting device 10 that exhibits mixed light as described below, and it is possible to improve the color reproducibility of the actual observed object and the color of the video when it is broadcast on the TV. Reproducibility, the mixed light is that the ratio of the luminous flux of the blue-green light source 18C to the luminous flux of the white light source 18W is less than 24%, and the ratio of the luminous flux of the red light source 18R to the luminous flux of the white light source 18W is less than 13%.

Next, FIG. 10 shows a second embodiment. In addition, the same code|symbol is used for the same structure as 1st Embodiment, and description about the structure and operation effect is abbreviate|omitted.

10 shows a plan view of the arena. The arena 30 is equipped with a venue 31 for competition, an auditorium 32 arranged around the venue 31, and a plurality of lighting devices 10 for illuminating the inside of the arena 30 (mainly the venue 31). The plurality of lighting devices 10 are installed, for example, on the upper parts of the plurality of pillars 33 erected adjacent to the arena 30 , or when the arena 30 has a roof, the plurality of lighting devices 10 are installed on the roof.

The lighting device 10 includes a plurality of first lighting devices 10a and at least one second lighting device 10b. The basic structure of the lighting device 10 is the same as that shown in FIG. 1 .

The first lighting device 10a emits white light with a correlated color temperature of 3000K to 6500K, and this spectral distribution is the same as the relative spectral distribution A shown in FIG. 2 . The first lighting device 10 a corresponds to the case where all the seven light sources 18 of the lighting device 10 shown in FIG. 1 are white light sources 18W.

The second illuminating device 10b emits light having a peak wavelength of 490nm to 520nm, a half-value width of 60nm or less, and satisfying 0.08≤x≤0.21, 0.27≤on the xy chromaticity diagram shown in FIG. 3 y≤0.72. The second lighting device 10 b corresponds to a case where all seven light sources 18 of the lighting device 10 shown in FIG. 1 are the cyan light source 18C, or both the cyan light source 18C and the red light source 18R.

And the light from the 1st lighting device 10a installed in the arena 30 and the light from the 2nd lighting device 10b are mixed and irradiated in the arena 30 (mainly the field 31).

The spectral distribution of the irradiation surface is a spectral distribution in which the white light from the first lighting device 10a is mixed with the cyan light or the cyan light and red light from the second lighting device 10b. This spectral distribution is similar to the relative spectral distribution B shown in FIG. When the luminous flux ratio of the cyan light and the red light and the white light, the cyan light, and the red light is 90:6:4, it is the same as the relative spectral distribution D shown in FIG. 7 . Therefore, the average color rendering index Ra and the color rendering evaluation index Qa for television lighting can be improved.

In addition, since the first lighting device 10a and the second lighting device 10b are independent, by adjusting the ratio of the number of the first lighting device 10a and the second lighting device 10b installed in the arena 30, it is possible to freely set the white light. The luminous flux ratio to blue-green light or the luminous flux ratio of white light, blue-green light to red light.

In this way, by using the second lighting device 10b emitting blue-green light or the second lighting device 10b emitting blue-green light and red light together with the first lighting device 10a emitting white light, and adjusting the number ratio of these lighting devices to set The luminous flux ratio can be fixed, so that the color reproducibility of the actual observation object and the color reproducibility of the image when it is broadcast on TV can be improved. In addition, it is possible to provide a lighting space design method for improving color reproducibility in a lighting space such as the arena 30 .

Next, Fig. 11 describes a third embodiment. In addition, the same code|symbol is used for the same structure as the said embodiment, and description about the structure and operation effect is abbreviate|omitted. In addition, the basic structure of the lighting device 10 is the same as that shown in FIG. 1 .

FIG. 11 shows a cross-sectional view of the light source 18 of the lighting device 10 . In the light source 18, a plurality of blue LEDs 41 are mounted on a substrate 40, and a phosphor layer 42 is formed covering the blue LEDs 41. The phosphor layer 42 is made of a transparent resin such as silicone resin, and the yellow phosphor 43Y and the green phosphor 43G are uniformly dispersed therein.

The blue LED 41 has a peak wavelength in the region of 400nm to 480nm.

The green phosphor 43G has a peak wavelength in a region of 480 nm to 520 nm, and a half width of 50 nm or less.

When the maximum value of the energy is set to 1, the relative spectral distribution of the light emitted from the phosphor layer 42 is 0.6 or more in the range of 520 nm to 600 nm.

The spectral distribution of the light source 18 is a spectral distribution obtained by mixing white light and blue-green light. This spectral distribution is the same as the relative spectral distribution B shown in FIG. 4 .

In this way, the illuminating device 10 irradiates light obtained by mixing white light and blue-green light from the light source 18. Therefore, not only the average color rendering index Ra but also the color rendering evaluation index Qa for TV lighting can be improved, and the actual observation can be improved. The color reproducibility of the object and the color reproducibility of the image when it is broadcast on TV.

Furthermore, the transparent resin of the phosphor layer 42 may contain and uniformly disperse the red phosphor 43R in addition to the yellow phosphor 43Y and the green phosphor 43G.

The red phosphor 43R has a peak wavelength in the region of 600 nm to 680 nm.

When the maximum value of the energy is set to 1, the relative spectral distribution of light emitted from the phosphor layer 42 is 0.6 or more in the range of 520 nm to 660 nm.

The spectral distribution of the light source 18 is a spectral distribution obtained by mixing white light, cyan light, and red light. This spectral distribution is the same as the relative spectral distribution D shown in FIG. 7 .

In this way, the lighting device 10 is irradiated from the light source 18 by mixing white light, blue-green light, and red light. Therefore, not only the average color rendering index Ra can be improved, but also the color rendering index Qa for TV lighting can be improved, and the color rendering index Qa can be improved. The color reproducibility of the actual observation object and the color reproducibility of the video when it is broadcast on TV.

Although some embodiments of the present invention have been described, these embodiments are merely examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in other various forms, and various omissions, substitutions, and changes are possible without departing from the gist of the invention. These embodiments or modifications thereof are included in the scope or spirit of the invention, and are included in a range equivalent thereto.

Claims (7)

1. A lighting device, characterized in that it comprises: white light source; A blue-green light source having a peak wavelength in the region of 490nm to 520nm, and A ratio of the luminous flux of the cyan light source to the luminous flux of the white light source is 30% or less. 2. The lighting device according to claim 1, characterized in that it comprises: A red light source has a peak wavelength in the region of 620nm to 660nm, The total luminous flux of the blue-green light source and the red light source is more than 8% of the overall luminous flux of the lighting device. 3. A lighting device, characterized in that it comprises: A white light source with a correlated color temperature of 3000K to 6500K; and The second light source emits light satisfying 0.08≤x≤0.21 and 0.27≤y≤0.72 on the xy chromaticity diagram, and A ratio of the luminous flux of the second light source to the luminous flux of the white light source is 30% or less. 4. The lighting device according to claim 3, characterized in that it comprises: A red light source has a peak wavelength in the region of 620nm to 660nm, The total luminous flux of the second light source and the red light source is more than 8% of the total luminous flux of the lighting device. 5. A lighting device, characterized in that it comprises: White light source, correlated color temperature is 3000K～6500K; The second light source emits light satisfying 0.08≤x≤0.21 and 0.27≤y≤0.72 on the xy chromaticity diagram; and The third light source emits light satisfying 0.48≤x≤0.72 and 0.28≤y≤0.45 on the xy chromaticity diagram, and The ratio of the luminous flux of the second light source to the luminous flux of the white light source is less than 24%, and the ratio of the luminous flux of the third light source to the luminous flux of the white light source is less than 13%. 6. A lighting device, characterized in that it comprises: A blue light-emitting diode having a peak wavelength in the region of 400nm to 480nm; and The phosphor layer includes a yellow phosphor and a green phosphor, and covers the blue light-emitting diode. The green phosphor has a peak wavelength in a region of 480 nm to 520 nm and a half-value width of 50 nm or less. 7. The lighting device according to claim 6, characterized in that, The phosphor layer includes a red phosphor having a peak wavelength in a region of 600 nm to 680 nm.