JP3143127B2 - Fluorescent lamp - Google Patents

Abstract

A fluorescent lamp ensures categorical color perception for surface colors of at least red, green, blue, yellow and white, while improving the luminous efficiency in scotopic vision and mesopic vision or in a wide visual field, wherein dominant radiation is obtained from a phosphor which has peak emission wavelength in a wavelength region from 530 to 580nm and a region from 600 to 650nm, flux ratio of a phosphor having peak emission wavelength in a wavelength region from 420 to 530nm is set to 4 to 40% of the total flux radiated in the dominant wavelength band, correlated color temperature of the lamp light color is set to 3500K to INFINITY and Duv (distance from perfect radiator locus on uv coordinates) is set within a range from 5 to 70. <IMAGE>

Description

Description: TECHNICAL FIELD The present invention relates to, at a minimum, surface colors (red, green, blue, yellow, white, black) which are basic colors for judging human color categories.
The present invention relates to a highly efficient illumination light source while ensuring color reproducibility that allows categorical identification of color).

Among them, the present invention relates to the following first technology, and the second and third technologies relate to the present invention.

The first is the visual sensation in scotopic and mesopic vision, or in a large field of vision, while ensuring color reproducibility that allows classification of red, green, blue, yellow, white, and black surface colors at a minimum. High brightness
The present invention relates to a fluorescent lamp and a metal halide lamp, which are highly efficient illumination light sources.

The second is that when used in combination with a conventional high color temperature light source, while ensuring color reproducibility that allows classification of red, green, blue, yellow, white, and black surface colors at a minimum. The present invention relates to a fluorescent lamp and a metal halide lamp having a light color with little sense of discomfort.

Thirdly, when used in combination with a conventional low color temperature light source, while ensuring color reproducibility that allows classification of red, green, blue, yellow, white, and black surface colors at a minimum. The present invention relates to a fluorescent lamp and a metal halide lamp, which have less unnaturalness in light color, have a light color equivalent to a bulb color, and have high efficiency as an illumination light source.

BACKGROUND ART In a conventional lamp, a reference light source (black body radiation / synthetic daylight) is used.
Average color rendering index (Ra)
While the spectral characteristics were designed by evaluating in,
By applying and developing the characteristics of color reproduction (categorical color perception), which enables humans to distinguish colors roughly, a Japanese patent application (Japanese Patent Application No. Hei 7-24 / 1994)
2863 (September 21, 1995), based on which PCT / JP96 / 0
There are 2618.

As a result, the color reproducibility capable of classifying and discriminating the surface colors of red, green, blue, yellow, white, and black (categorical color perception), which are the basic colors of human color category judgment, is secured at a minimum. In addition, a highly efficient light source can be realized. The point of realizing the light source that realizes the categorical color perception with high efficiency was to concentrate the light emission mainly on the green and red wavelength bands. Hereinafter, this is referred to as a high efficiency new light source.

Such a new high-efficiency light source that gives priority to the luminous efficiency of the light source while satisfying the minimum color appearance is often used mainly in the field of outdoor lighting. This is because high-quality color appearance is not required in outdoor lighting as in indoor lighting, and the luminous efficiency of the light source is mainly given priority.

Another point of realizing the high-efficiency new light source is to design the shift (Duv) from the blackbody radiation locus to 0 or more on the uv chromaticity coordinates.

In the range where the deviation (Duv) from the blackbody radiation locus is 0 or more, categorical color perception of the basic color is possible with high efficiency, so that the high-efficiency new light source can maintain the categorical appearance of the basic color. As long as Duv takes a positive value.

Here, a portion where Duv is not used in the conventional illumination light source other than the new light source within the positive range will be described in detail.

2. Description of the Related Art Conventionally, there is an IEC (International Electrotechnical Commission) standard that describes the light color of a light source as an international standard regarding chromaticity classification of an illumination light source. In addition, each country in the world may have its own standard. An example of such an example is the chromaticity classification standard of fluorescent lamps specified in JIS (Japanese Industrial Standard) in Japan.

The IEC standard determines a center point near the blackbody radiation locus, determines the light color with its tolerance, and the JIS defines upper and lower limit lines near the blackbody radiation locus, allowing It is a standard for the range.

In particular, conventional lamps have been developed from the standpoint of evaluating the conventional color rendering properties, with consideration given not to deviate upward (Duv is positive) from the blackbody radiation locus.

However, in practice, the width of the allowable range of IEC is 7.5 to 9.5 in the vertical direction of Duv, and the width of the allowable range of JIS is 10 to 19, so the conventional illumination light source is actually Du
Light colors in the range of 5 to 10 to the plus side of v have been put to practical use.

In addition, to explain the conventional use range of the light source light color as white from a different viewpoint, there is a definition of the CIE signal light color, and in this, it is specified in a narrow range along the black body radiation locus. The plus side of Duv outside the white range is the so-called
It has not been conventionally used as a white light in illumination light sources.

A first problem to be solved by the present invention is to improve the luminous brightness of the above-mentioned high efficiency new light source in scotopic vision and mesopic vision.

In photopic conditions with high illuminance, the cones work in the photoreceptors of the eye, and in scotopic conditions with low illuminance, the rods work in the photoreceptors of the eye, and in the middle, dim light It is known that both cones and rods work in the visual state. However, the spectral distribution of the conventional illumination light source has been designed on the premise of the photopic state in which the cone works.

On the other hand, instead of the conventional light source for faithful color reproduction, the above-mentioned high-efficiency new light source is applied in a case where illumination is designed for relatively low illuminance (scotopic vision, mesopic vision). is there.

Therefore, with respect to the high-efficiency new light source, the first problem to be solved by the present invention is to consider the influence of the rod and to design spectral characteristics with emphasis on a relatively low illuminance state. I do.

A second problem to be solved by the present invention is to improve the luminous brightness of a large field of view of the high efficiency new light source.

In general, illuminance and luminance are used as light measurement amounts corresponding to brightness, but the spectral characteristics of illuminance and luminance are based on the spectral characteristics of brightness in a 2 [゜] visual field near or at the center of the eye. It is. However, in an actual lighting environment, light is received not only from a limited area at the center but also from a larger field of view, and depending on the spectral distribution of the light source, the correspondence between the actual brightness and the illuminance may differ. there were.

Therefore, the second solution to the above-mentioned high efficiency new light source is to set a spectral characteristic that enhances a luminous sensation in a large visual field that is felt in an actual illumination field. Task to do.

In this specification, the following third and fourth problems will also be described in relation to the technology related to the present invention. That is, the third problem to be solved is to improve the luminous color whiteness of the high efficiency new light source.

In the high-efficiency new light source, the range of light color with high whiteness is not clear.

On the other hand, it is a third problem to be solved by the technology related to the present invention to enhance the white feeling of the high-efficiency new light source.

A fourth problem to be solved by the technique related to the present invention is to give the high-efficiency new light source a light color appearance as a light bulb color.

In other words, it is an object of the fourth solution of the technology related to the present invention to provide the high-efficiency new light source with a light-emitting color image as a light source of a low color temperature.

DISCLOSURE OF THE INVENTION The present invention is to improve the brightness of the high-efficiency new light source in mesopic and scotopic vision, and to improve the brightness in a large field of view, the illumination light source of the present invention is as follows. It has means for solving the problem.

A first aspect of the present invention (corresponding to the first aspect of the present invention) is a fluorescent lamp for categorical color perception, which mainly emits light having a peak emission wavelength range of 530 to 580 [nm]. And a phosphor having a light emission wavelength in the range of 420 to 530 [nm], which is obtained by using a phosphor having a light emission wavelength in the range of 420 to 530 [nm] to the total light flux in the main light emission wavelength range. On the other hand, it is 4 to 40%, and the correlated color temperature of the lamp light color is 3500
~ ∽ [K], Duv (distance from perfect radiator lo
cus on uv co-ordinates) is 5 to 70, provided that JIS
It is characterized by excluding the range of the limit chromaticity coordinates described in the table of Z9112-1976 and Table 1 of JIS Z9112-1983, and the range of the peak of the emission wavelength is in the range of 420 to 530 [nm]. Compared to the case where no phosphor is present, the luminous efficiency in scotopic vision and mesopic vision or in a large visual field is high, and at least the red, green, blue, yellow, and white The fluorescent lamp is characterized in that categorical identification is possible.

A second aspect of the present invention (corresponding to the second aspect of the present invention) is a fluorescent lamp for categorical color perception, which mainly emits light having a peak emission wavelength range of 530 to 580 [nm]. And a phosphor having a light emission wavelength in the range of 470 to 530 [nm]. On the other hand, it is 4 to 40%, and the correlated color temperature of the lamp light color is 3500
~ ∽ [K], Duv (distance from perfect radiator lo
cus on uv co-ordinates) is 5 to 70, provided that JIS
It is characterized by excluding the range of the limit chromaticity coordinates described in the table of Z9112-1976 and Table 1 of JIS Z9112-1983, and the range of the peak of the emission wavelength is 470 to 530 [nm]. Compared to the case where no phosphor is present, the luminous efficiency in scotopic vision and mesopic vision or in a large visual field is high, and at least the red, green, blue, yellow, and white The fluorescent lamp is characterized in that categorical identification is possible.

A third aspect of the present invention (corresponding to the third aspect of the present invention) is a fluorescent lamp for categorical color perception, wherein the emission wavelength peak ranges from 420 to 530 [nm] and 530 to 580 [nm]. ], 60
It is composed of a phosphor contained in the range of 0 to 650 [nm] and has a range of y <−0.43x + 0.60, y> 0.64x + 0.15, x> 0.16 in xy chromaticity coordinates, provided that JIS Z9112-1976 Table and JIS Z9112
-A phosphor having a light color excluding the range of the limit chromaticity coordinates described in Table 1 of 1983, and having a peak emission wavelength range of 420 to 530 [nm]. The luminous efficiency in scotopic vision and mesopic vision or in a large visual field is higher than in the case where no illumination is performed. Is a fluorescent lamp characterized by the following.

A fourth aspect of the present invention (corresponding to the invention according to claim 4) is a fluorescent lamp for categorical color perception, wherein the emission wavelength peak ranges from 470 to 530 [nm] and 530 to 580 [nm]. ], 60
It is composed of a phosphor contained in the range of 0 to 650 [nm] and has a range of y <−0.43x + 0.60, y> 0.64x + 0.15, x> 0.16 in xy chromaticity coordinates, provided that JIS Z9112-1976 Table and JIS Z9112
A phosphor having a light color excluding the range of the limit chromaticity coordinates described in Table 1 of 1983 and having a peak range of the emission wavelength in the range of 470 to 530 [nm]; The luminous efficiency in scotopic vision and mesopic vision or in a large visual field is higher than in the case where no illumination is performed. Is a fluorescent lamp characterized by the following.

According to a fifth aspect of the present invention (corresponding to the fifth aspect of the present invention), a main emission is obtained, and a peak range of an emission wavelength is 530 to 580.
The phosphor of [nm] is terbium or a phosphor activated by terbium and cerium, and the phosphor of 600 to 650 [nm] is a phosphor activated by europium or manganese, and has an emission peak wavelength. Wherein the phosphor present at 420 to 530 [nm] is europium, or phosphor activated with europium and manganese, or antimony, or manganese, or antimony and manganese. 3. The fluorescent lamp according to any one of 3.

According to a sixth aspect of the present invention (corresponding to the sixth aspect of the present invention), a main emission is obtained, and a peak range of an emission wavelength is 530 to 580.
The phosphor of [nm] is terbium or a phosphor activated by terbium and cerium, and the phosphor of 600 to 650 [nm] is a phosphor activated by europium or manganese, and has an emission peak wavelength. Wherein the phosphor present at 470 to 530 [nm] is europium, or europium and manganese, or antimony, or manganese, or phosphor activated with antimony and manganese, wherein 5. The fluorescent lamp according to any one of 4.

According to a seventh aspect of the present invention (corresponding to the seventh aspect of the present invention), the emission wavelength peak ranges are 530 to 580 [nm] and 600 to 650 [nm].
The phosphor at [nm] is changed to (Ce, Gd, Tb) (Mg, Mn) B ₅ O
_10, a (Ce, Gd) (Mg, Mn) B 5 fluorescent lamp according to any one of claims 1 to 6 O ₁₀ that is realized by a phosphor which is constituted by the said.

According to an eighth aspect of the present invention (corresponding to the eighth aspect of the present invention), the phosphor having an emission peak wavelength in the range of 420 to 530 [nm] is a calcium halophosphate phosphor. A fluorescent lamp according to any one of 3, 5, and 7.

In a ninth aspect of the present invention (corresponding to the ninth aspect of the present invention), the phosphor having an emission peak wavelength of 470 to 530 [nm] is a calcium halophosphate phosphor. A fluorescent lamp according to any one of claims 4, 6, and 7.

According to a tenth aspect of the present invention (corresponding to the tenth aspect of the present invention), the phosphor having an emission peak wavelength of 420 to 530 [nm] is Ba
MgAl ₁₀ O ₁₇ : Eu or (Sr, Ca, Ba) ₁₀ (PO ₄ ) ₆ Cl ₂ : E
The fluorescent lamp according to any one of claims 1, 3, 5, 7, and 8, wherein u or BaMgAl ₁₀ O ₁₇ : Eu, Mn.

According to the eleventh invention (corresponding to the invention described in claim 11), the phosphor having an emission peak wavelength of 470 to 530 [nm] is Sr ₄ A
10. The fluorescent lamp according to claim 2, wherein the fluorescent lamp is l ₁₄ O ₂₅ : Eu or Ce (Mg, Zn) Al ₁₁ O ₁₉ : Mn.

According to a twelfth aspect of the present invention (corresponding to the twelfth aspect of the present invention), a phosphor having an emission peak wavelength of 420 to 470 [nm] and a phosphor having an emission peak wavelength of 470 to 530 [nm] are simultaneously used. The fluorescent lamp according to any one of claims 1 to 11, wherein the fluorescent lamp has:

According to a thirteenth aspect of the present invention (corresponding to the invention according to claim 13), a phosphor having an emission peak wavelength of 420 to 470 [nm] and a phosphor having an emission peak wavelength of 470 to 530 [nm] are (Ba). , Sr) MgAl
13. The fluorescent lamp according to claim 12, wherein ₁₀ O ₁₇ : Eu, Mn.

The fourteenth invention (corresponding to the invention according to claim 14) is used for outdoor lighting, road lighting, street lighting, safety light, vehicle lighting, tunnel lighting, plaza lighting, garage lighting, warehouse lighting, or factory lighting. The fluorescent lamp according to any one of claims 1 to 13, wherein:

Hereinafter, a description will be given of a technology related to the present invention.

That is, when the high efficiency new light source is used in combination with the conventional high color temperature light source, the illumination light source of the technology related to the present invention has the following problems in order to improve the white appearance of the emitted light color. Is provided.

A first invention of a technique related to the present invention is a fluorescent lamp for categorical color perception, which mainly emits light having a peak wavelength range of 530 to 580 [nm] and 600 to 650.
A phosphor having a peak emission wavelength in the range of 420 to 470 [nm] as a secondary emission wavelength, and having a correlated color temperature of 3500 to ∽ [K]. , And Duv (distance from perfect radiator locus on u
v co-ordinates) is in the range of 5 to 70, and on the xy chromaticity coordinates, the relationship between x and y is in the range of y <−0.43x + 0.60. This fluorescent lamp is characterized in that categorical identification of red, green, blue, yellow, and white colors of the surface color of an illuminated object is possible.

A second invention related to the present invention relates to a fluorescent lamp for categorical color perception, which emits main light having a peak wavelength range of 530 to 580 [nm] and 600 to 650.
A phosphor having an emission wavelength peak in the range of 420 to 470 [nm] at least as a sub-emission wavelength, and having a chromaticity value (x ,
y) = a: (0.228,0.351), b: (0.358,0.551), c: (0.52
5,0.440), d: (0.453, 0.440), e: (0.285, 0.332), the relationship between x and y is y <−0.43x + 0.60
Fluorescent lamp characterized in that at least categorical identification of red, green, blue, yellow, and white colors of the surface color of the illuminated object is possible while enhancing the whiteness of the emission color. It is.

A third invention of a technique related to the present invention is a fluorescent lamp for categorical color perception, in which a main light emission is obtained by a phosphor whose emission wavelength peak range is 530 to 580 [nm],
On the xy chromaticity coordinates, the chromaticity value (x, y) = a: (0.228,0.
351), b: (0.358,0.551), c: (0.525,0.440), d: (0.45
3,0.440), e: (0.285,0.332)
The relationship between x and y is in the range of y <−0.43x + 0.60, and at least red, green, blue, yellow, and white color categories of the surface color of the illuminated object while enhancing the whiteness of the emission color. It is a fluorescent lamp characterized in that it is possible to perform a distinction.

A fourth invention related to the present invention is a secondary emission wavelength 42
The ratio [%] of the luminous flux emitted from the phosphor having an emission peak at 0 to 470 [nm] to the luminous flux emitted from the phosphor having an emission peak at a main emission wavelength of 530 to 580 [nm] is represented by B: G. , B is 4 to 11 [%], and G is 96 to 89 [%]. The fluorescent lamp according to any one of the first to third inventions related to the present invention.

A fifth invention related to the present invention is an emission wavelength 600 nm.
The luminous flux emitted from the phosphor having the emission peak at 420 to 470 [nm] and the luminescence wavelength 530 to 580 [nm] for the luminous flux emitted from the phosphor having the emission peak at 650650 [nm]
The ratio [%] of the sum of the luminous fluxes emitted from the phosphors having a light emission peak to R: (B + G), R is 0 to 28 [%],
The fluorescent lamp according to any one of the first to fourth aspects of the present invention, wherein B + G is set to 100 to 72 [%].

A sixth invention related to the present invention relates to a phosphor obtained by activating europium, which is a phosphor having an emission peak exceeding 420 to 470 [nm], and having an emission wavelength peak of 530 to 580 [nm]. Terbium or terbium and cerium activated phosphor, the emission wavelength peak is 600 to 650 [n
m] is a phosphor activated with manganese or europium. The fluorescent lamp according to any one of the first to fifth aspects of the present invention, wherein the phosphor is a phosphor activated with manganese or europium.

A seventh invention related to the present invention relates to a terbium-activated phosphor having a peak emission wavelength of 530 to 580 [nm] and a halophosphate phosphor. A fluorescent lamp according to a third aspect of the present invention, which is related to the present invention.

An eighth invention related to the present invention relates to a method for producing phosphors having emission wavelength peak ranges of 530 to 580 [nm] and 600 to 650 [nm] by using (Ce, Gd, Tb) (Mg, Mn). B ₅ O ₁₀ and (Ce, Gd) (Mg,
Mn) is a fluorescent lamp according to any one of first to sixth aspect of the technology related to the present invention, characterized in that is realized by a phosphor which is constituted by B ₅ O _10.

According to a ninth aspect of the technology relating to the present invention, the phosphor having an emission peak wavelength of 420 to 470 [nm] is BaMgAl ₁₀ O ₁₇ :
Eu or (Sr, Ca, Ba) ₁₀ (PO ₄ ) ₆ Cl ₂ : Eu or
BaMgAl ₁₀ O ₁₇ : Eu, Mn, any one of the first to sixth inventions related to the present invention, or the eighth aspect of the fluorescent lamp according to the present invention. It is.

Next, when the high-efficiency new light source is used in combination with a conventional low-color temperature light source, the illumination light source according to the present invention relates to a technique related to the present invention in order to improve the sense of incongruity of the emitted light color as a bulb color. Has means for solving the following problems.

A tenth invention related to the present invention relates to a fluorescent lamp for categorical color perception, which emits main light having a peak wavelength range of 530 to 580 [nm] and 600 to 650.
Obtained with phosphor at [nm], correlated color temperature is 1700 ~ ∽
[K], Duv (distance from perfect radiator locus
on uv co-ordinates) is 5 to 70, and the chromaticity value (x, y) in xy chromaticity coordinates is fx ² + gy ² + hxy + ix + jy + k
= 0, f = 0.6179, g = 0.6179, h = -0.7643, i = -0.220
5, j = -0.1765, k = 0.0829, and have a luminescent color in a range overlapping with a range of a quadratic curve, and at least red, green, blue, yellow, and white colors of the surface color of the illuminated object. The fluorescent lamp is characterized in that categorical identification is possible.

An eleventh invention related to the present invention is a fluorescent lamp for categorical color perception, which emits main light having a peak wavelength range of 530 to 580 [nm] and 600 to 650 [nm].
Chromaticity value (x, y) at xy chromaticity coordinates is fx ² + gy ² + hxy
+ Ix + jy + k = 0, f = 0.6179, g = 0.6179, h = −0.764
From the range of the quadratic curve of 3, i = -0.2205, j = -0.1765, k = 0.0829, the point l of the xy chromaticity coordinates: l: (0.4775, 0.4283), m:
(0.4594,0.3971), n: (0.4214,0.3887), o: (0.4171,
0.3846), p: (0.3903,0.3719), q: (0.3805,0.3642),
r: (0.3656,0.3905), s: (0.3938,0.4097), t: (0.402
1,0.4076), u: (0.4341,0.4233), v: (0.4348,0.4185)
Are characterized by a range excluding the range (1 to v) connecting at least, and at least red, green, blue, yellow,
A fluorescent lamp characterized in that categorical identification of white color is possible.

A twelfth invention related to the present invention relates to a fluorescent lamp obtained from a phosphor having a main emission wavelength of 530 to 580 nm and an emission peak wavelength of 600 to 650 nm, and a fluorescent lamp having a peak wavelength of 530 to 580 nm. Luminous flux emitted from the body, 600-6
The ratio G: R (%) of luminous flux emitted from a phosphor having an emission peak wavelength at 50 nm is G = 70 to 59 and R = 30 to 41. Tenth or
It is a fluorescent lamp of the eleventh invention.

A thirteenth invention of the technology related to the present invention is a fluorescent lamp obtained from a phosphor having a main emission wavelength of 530 to 580 nm and an emission peak wavelength of 600 to 650 nm, and having a sub emission wavelength of 42.
Obtained from a phosphor having an emission peak at 0-530 nm, 420-530
nm (B + BG), 530 to 580 nm (G), ratio of luminous flux emitted from a phosphor having an emission peak at 600 to 650 nm (R) (B
+ BG): G: R (%) is B + BG = 0-3, G = 59-71, R
= 41-26, the fluorescent lamp according to any one of the tenth to twelfth aspects of the technology relating to the present invention.

According to a fourteenth aspect of the technology relating to the present invention, the phosphor having an emission wavelength peak range of 530 to 580 [nm] is terbium or a phosphor obtained by activating terbium and cerium,
The fluorescent lamp according to any one of the tenth to thirteenth inventions related to the present invention, wherein the phosphor of 600 to 650 [nm] is a phosphor activated with europium or manganese. It is.

A fifteenth invention of the technology related to the present invention relates to a method of producing a phosphor having emission wavelength peak ranges of 530 to 580 [nm] and 600 to 650 [nm] by using (Ce, Gd, Tb) (Mg, Mn). B ₅ O ₁₀ and (Ce, Gd) (Mg,
Mn) is a fluorescent lamp according to any one of 10 through 14 of the invention B ₅ O ₁₀ relating to the present invention, characterized in that is realized by a phosphor which is constituted by a technology.

A sixteenth aspect of the technology related to the present invention includes outdoor lighting, road lighting, street lighting, safety lights, vehicle lighting, tunnel lighting,
Square lighting, garage lighting, warehouse lighting, or the first of the techniques related to the present invention characterized by using the factory lighting
15 is the fluorescent lamp of the present invention of 15th.

When the technology related to the present invention is realized by a light source other than the fluorescent lamp, the illumination light source according to the technology related to the present invention has means for solving the following problems.

The seventeenth invention related to the present invention relates to the above first to fourteenth aspects.
Or a metal halide lamp having a light color and emission spectrum equivalent to those of the fluorescent lamp according to any one of the first to fifteenth aspects of the technology related to the present invention. .

The eighteenth invention of the technology related to the present invention is an outdoor light, a road light, a street light, a safety light, a vehicle light, a tunnel light,
A metal halide lamp according to a seventeenth aspect of the present invention, wherein the metal halide lamp is used for square lighting, garage lighting, warehouse lighting, or factory lighting.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a graph showing the spectral distribution of a typical embodiment of the fluorescent lamp of the present invention.

2 and 3 are diagrams showing a comparison of various relative luminous sensitivities in which relative luminous sensitivities are made relative to each other with a peak height of 1.

Figure 4 is V _{b, 10} (λ) and V _b, the difference between the _{2 (λ), V M (} λ) and difference between V (λ), V ₁₀ and (λ) V (λ) = V 2 (λ) FIG. 7 is a diagram showing a difference between V ′ (λ) and V (λ).

FIG. 5 is a diagram showing the basic spectral sensitivities of the three types of cones of the eye (S cone, M cone, and L cone) and the basic spectral sensitivities of the rods relative to each other, with the peak as 1.

FIG. 6 is a diagram showing the range on the xy chromaticity coordinates of the fluorescent lamp of the present invention (claims 3 and 4).

FIG. 7 is a diagram showing the theoretical efficiency of light on xy chromaticity coordinates.

FIG. 8 is a diagram showing a correction coefficient F of luminance on xy chromaticity coordinates.

FIG. 9 is a diagram showing positions on a spectrum locus of a unique color.

FIG. 10 shows light sources 17 (la) to light sources on xy chromaticity coordinates.
The xy chromaticity value of 21 (le) and its regression line 22 (y = −0.43x
+0.58).

FIG. 11 shows chromaticity values (x, y) = a: (0.228, 0.351), b: (0.358, 0.551), c: in the second and third aspects of the technology related to the present invention.
(0.525,0.440), d: (0.453,0.440), e: (0.285,0.33
FIG. 2 is a diagram showing a relationship between 2), a straight line 23 (y <−0.43x + 0.60), and a color name of a light source color.

12 to 16 are diagrams showing the spectral distributions of the light sources (lf) to (lj), which are examples of the 20W fluorescent lamp.

FIG. 17 is a spectral distribution diagram when the high-efficiency new light source is realized by a fluorescent lamp.

FIG. 18 shows chromaticity values (x, y) = a: (0.228, 0.351), b: (0.358, 0.551), c: in the second and third aspects of the technology related to the present invention.
(0.525,0.440), d: (0.453,0.440), e: (0.285,0.33
The chromaticity range 25 and the like defined by y <−0.43x + 0.60 in the range surrounded by 2) are shown on the xy chromaticity coordinates.

FIG. 19 is a diagram showing 21 types of light colors from t1 to t21 on xy chromaticity coordinates.

FIG. 20 is a diagram showing, for each xy chromaticity point of each test light source, the percentage of responding that the light bulb color is acceptable as a decimal point.

FIG. 21 is a diagram showing l to v of the tenth invention related to the present invention.
FIG. 4 is a diagram showing a relationship between a range and a curve 23.

FIG. 22 is a diagram showing a range of light colors of a JIS fluorescent lamp to be compared as a reference.

FIGS. 23 to 26 are diagrams showing the spectral distribution of the embodiment of the fluorescent lamp when the luminous flux ratio of LAP: YOX is changed.

FIG. 27 is a diagram showing a spectral distribution of a fluorescent lamp as another embodiment of the present invention.

FIG. 28 is a diagram showing the relationship between the value of V '(λ) / V (λ) and the various light sources.

FIG. 29 is a diagram showing the relationship between the value of V ₁₀ (λ) / V (λ) and the various light sources.

BEST MODE FOR CARRYING OUT THE INVENTION The new high-efficiency light source has a categorization of red, green, blue, yellow, white and black surface colors by concentrating light emission mainly on green and red wavelength bands. Although a highly efficient light source is realized while ensuring reproducible color reproducibility, the first embodiment of the present invention adds light emission in the blue or blue-green wavelength band to this, It is intended to improve the luminous brightness of scotopic vision and mesopic vision and the luminous brightness of large visual field.

Next, a representative embodiment of the fluorescent lamp of the present invention is shown in FIG.

The solid line 1 in FIG. 1 shows the spectral distribution when the present invention is implemented with a fluorescent lamp, and the broken line 2 shows the spectral distribution when the high-efficiency new light source is implemented with a fluorescent lamp. In the present invention, as shown in FIG. 1, by emphasizing the relative power of the blue or blue-green spectral distribution, the high-efficiency new light source provides a luminous sensation of scotopic vision and mesopic vision, and a large visual field. The visual perception of brightness can be improved. Hereinafter, this basis will be described in detail.

The response characteristics regarding the brightness of light differ from spectrum to spectrum, and this is called relative luminosity or relative luminosity function.
In general, the brightness of illumination is evaluated by a standard photopic luminous efficiency function (hereinafter V (λ)) defined by the CIE (International Commission on Illumination). This reflects the condition in which the eyes are used to a bright place, that is, the brightness sensitivity characteristics of the cone photoreceptors in photopic vision. This is known to have a center of sensitivity at 555 [nm], and a normal illumination light source is evaluated based on the efficiency of spectral characteristics with respect to V (λ).

On the other hand, the standard scotopic relative luminosity function (CIE (International Commission on Illumination)) defines the condition in which the eyes are used to a dark place, that is, the one reflecting the brightness sensitivity characteristics of rod photoreceptors in scotopic vision. Hereinafter, there is V ′ (λ)). This is known to have a center of sensitivity at 507 [nm].

Also, it is said that mesopic vision, which is a state of brightness intermediate between photopic and scotopic vision, has intermediate luminous efficiency characteristics between these, and these change depending on the adaptation state of the environment brightness to the eye. I do.

In other words, there is a fact that the sensitivity is higher in the blue or blue-green band than in photopic vision in a scotopic or mesopic state. On the other hand, unlike the conventional illumination light source that presupposes photopic efficiency, the high-efficiency new light source often used mainly in a place where design illuminance is dark has a blue or blue-green band spectrum. By adding, it is possible to increase the effective and visual brightness feeling.

Various modifications have been made to the conventional V (λ).

First, the Judd's modified colo function
rmaching functions) (V
_M (λ)). The reason for this correction is that V (λ) was underestimated in the short wavelength blue band. V _M (λ)
Is more likely to reflect the reality, but it is also true that it is undesirable to change the photometric system,
No.86 ”(CIE Publication No.86: 2 ゜ Spectral lumi
nous efficiency function for photopic vision (199
0)), but is not reflected in the evaluation of the brightness of general lamps.

Next, the relative luminous efficiency in which the size of the visual field differs from V (λ) will be described. V (λ) is V ₂ (λ) that is based on a 2 [゜] degree field of view, which is the range of central vision depending on whether the center has high visual acuity.
[゜] V ₁₀ (λ) is composed of a degree field of view. This is "CIE Publication 1964" (CIE
1964 supplementary colorimetric standard syste
m).

The light that reaches the eyes in a real environment is not only from a narrow visual field but from a wide visual field.
It is thought that ₁₀ (λ) reflects the actual situation.

The cone includes an S (blue) cone sensitive to short wavelengths, an L (red) cone sensitive to long wavelengths, and an M (green) cone in between, but S or C is located at the center or in the vicinity. Since the number of cones is small and the number of S cones is large at the periphery of the center, a larger visual dimension results in a higher estimation of the sensitivity for blue.

In addition, since there is no rod at the center or V ′ (λ) itself is a relative luminous efficiency composed of points deviated from the center, V ′ (λ) itself has a low illuminance such as scotopic vision or mesopic vision. To correct the brightness of the light source assuming use, and to correct the sense of brightness due to the light that enters the eyes from a large field of view in the real environment,
It turns out that the blue or blue-green band has an important meaning.

Next, based on the results obtained by the illumination method that alternately presents light of different colors and minimizes flickering, and the successive comparison method that obtains light of slightly different color by brightness matching. A description will be given of the relative luminous efficiency configured by a method of directly comparing the brightness of V (λ) with the direct matching method.

This is a direct extraction of the sense of visual brightness.
(CIE Publication No.75: Spectral luminous efficie
ncy functions based upon brightness maching for mo
nochromatic point sources 2 ゜ and 10 ゜ fields (198
8)) and 2 [と し て] degree field of view is V
_{A b, 2} (λ), 10 [゜] degree field of view is called V _{b, 10} (λ). In this case, it corresponds well to the direct brightness sensitivity, but has a smooth profile. Do not draw.

However, the direct matching method also shows that the difference in Vb, 10 (λ) with respect to Vb _{, 2} (λ) indicates that the larger the visual dimension, the higher the sensitivity for blue.

These V ₁₀ (λ), V _M (λ), V ′ (λ), V
_{b, 2} (λ) and V _{b, 10} (λ) are, respectively,
Although it better reflects the actual state of V (λ), it is regarded as an auxiliary brightness light measurement, and is not used for evaluating and developing the brightness of general lamps.

However, in view of the actual situation, if these are combined, it is possible to increase the visual and effective brightness of the high-efficiency new light source, which is characterized by being used at relatively low illuminance.

FIG. 2 and FIG. 3 are comparisons of various relative luminous sensitivities in which the relative luminous sensitivities are made relative to each other with the peak height being 1. FIG.
_{(Λ), V 10 (λ} ), V M (λ), shows the V '(λ). Further, FIG. 3 shows that psychophysical (ph
Vb _{, 2} (λ) and _{Vb, 10}
(Λ) and V (λ) for reference.

Based on this, V _{b, 10} in FIG. 4 (lambda) and V _b, the difference between the difference of _{2 (λ), V M (} λ) and _{V (λ), V 10 (} λ) and V (lambda) = V
The difference between ₂ (λ) and the difference between V ′ (λ) and V (λ) is shown as the difference between various relative luminous efficiencies.

Considering these various relative luminous efficiencies, the positive side of this graph corresponds to the percentages that were underestimated for conventional V (λ), which are concentrated in the blue or blue-green band. I understand.

Next, when these are individually examined, the following relationships are derived between various relative luminous efficiency peaks and their ranges.

● The peak of the difference between V _{b, 10} (λ) and V _{b, 2} (λ) is 500 [n
m], and the range of peak ratio within 50% is 460 to 520 nm,
The range within the peak ratio of 80 [%] is 480 to 505 [nm].

● Peak of difference between V _M (λ) and V (lambda) is 435 [nm], a range within the peak ratio of 50 [%] is four hundred and fifteen to four hundred fifty [nm], peak ratio 80
The range within [%] is 420 to 445 [nm].

● The peak of the difference between V ₁₀ (λ) and V (λ) = V ₂ (λ) is 500
[Nm] and the peak ratio within 50 [%] range from 465 to 515 [n
m] and the range within a peak ratio of 80% is 480 to 505 nm.

● The peak of the difference between V '(λ) and V (λ) is 490 [nm], the range within 50 [%] is 445 to 515 [nm], and the peak ratio is
The range within 80 [%] is 470 to 505 [nm].

Also, since the derivation method is different, direct comparison is not possible. However, as a reference: ● The peak of the difference between V _{b, 2} (λ) and V (λ) is 530 [nm], and the peak ratio is within 50 [%]. Is divided into 430 to 480 [nm] and 510 to 535 [nm] due to distortion of relative luminous efficiency.
Here, the range within a peak ratio of 80 [%] is 530 [n].
m] ± 2.5 [nm].

● The peak of the difference between V _{b, 10} (λ) and V (λ) is 500 [nm],
The range within a peak ratio of 50 [%] is 450 to 520 [nm], and the range within a peak ratio of 80 [%] is 475 to 510 [nm].

From the above relationship, a range that is largely on the plus side in the graph of FIG. 4 and in which the spectral distribution should be corrected will be considered.

Here, by combining these correction bands at a wavelength equal to or less than the main emission wavelength range of the high-efficiency new light source,
The range of 420 to 530 [nm] is the range to be corrected.

 The present invention is based on this range.

Further, a range having a high effect in this range will be discussed below.

VM (λ) is a correction for the blue band of 455 [nm] or less mainly related to the S cone, and many corrections on the short wavelength side of visible light have absolutely small original sensitivities. _M (λ) and V
The most effective region within the correction peak ratio of 80 [%] other than the difference of (λ) is in the range of 470 to 530 [nm].

Next, FIG. 5 shows the basic spectral sensitivities of the three types of cones of the eye (S-cone, M-cone, and L-cone) and the basic spectral sensitivities of the rods relative to each other, where the peak is 1.

Here, it can be seen that the rod working in mesopic vision and scotopic vision has a peak in spectral sensitivity between the S cone and the M cone.

In addition, general illumination light sources are three types of cones (S
The objective is to stimulate the cone, M cone, and L cone). The above-mentioned high-efficiency new light source mainly focuses on the green and red bands, so that two types of cones are mainly used. Body (M cone, L cone)
And stimulates mainly the visual r-g opponent color response system.

Here, since the conventional illumination light source is assumed to be used for photopic vision, the spectral sensitivity of the rod has not been taken into account. The improvement of the visual perception of brightness is mainly due to two types of cones (M cone, L cone)
It is characterized by stimulating the rod and the rod, and in order to reduce the rate of stimulating the S-cone with a small contribution to the brightness sensation and increase the efficiency of stimulating the rod, add to the high efficiency new light source The emission wavelength should be concentrated in the blue-green band of 470 to 530 [nm].

Also, since the density of S cones is high at the center or periphery of the retina, a larger visual dimension results in a higher estimation of the sensitivity for S cones. The improvement of the sense of target brightness can be realized by increasing the degree of stimulating the S cones distributed mainly at the center or periphery of the retina. For this purpose, the emission wavelength to be added to the high-efficiency new light source may be concentrated in the blue band of 420 to 470 [nm].

Since the relative luminous efficiency of the S-cone and the rod overlaps, a wavelength band that improves both the luminous brightness in scotopic vision and mesopic vision and the luminous brightness in large visual fields. Is 420 to 530 [n
m]. However, on the short wavelength side of visible light, various relative luminous sensitivities to the original brightness are absolutely small,
If you try to improve both of them efficiently, 470-530
It is better to give more weight to [nm].

While increasing the luminous efficiency in scotopic and mesopic or large fields of view, at least the surface colors of the illuminated object are red, green,
In order to enable categorical identification of blue, yellow, and white colors, it is desirable to enhance the blue or blue-green component of the light color of the lamp. For this purpose, when the correlated color temperature of the lamp light color is set high and the correlated color temperature, which is an index of general light source light color, is used as an index, the correlated color temperature is set to 3500 [K] or more. It is desirable to set the chromaticity of the light color in the range of y <−0.43x + 0.60 in the xy chromaticity coordinates.

FIG. 6 shows a range on the xy chromaticity coordinates of the fluorescent lamp of the present invention (claims 3 and 4). These inventions are based on y <3 in FIG.
−0.43x + 0.60, y> 0.64x + 0.15 in FIG. 6, 4 in FIG.
This is realized by having a light color in a range surrounded by an xy chromaticity range of x> 0.16, the reason for which is described below.

y = 0.64x + 0.15 is a CIE document (CIE TECHNICAL REPORT
CIE 107-1994; REIEW OF THE OFFICIAL RECOMMENDATIO
NS corresponds to the upper limit to the greenness of the white light in the NS of the FOR THE COLOURS OF SIGNAL LIGHTS. And that it is in a region of illumination light that has not existed conventionally.

In the range of y <−0.43x + 0.60, the high-efficiency new light source whose light emission is concentrated mainly in the green and red bands in a visual experiment, a phosphor having an emission peak wavelength of 420 to 530 [nm], Or
This is a result obtained by adding a phosphor existing at 470 to 530 [nm] and finding a point at which the color tone is reduced.

As a representative example of the experiment, first, LaPO ₄ : Ce, Tb (LAP), which is generally used as a phosphor for emitting green light, and Y _2, which is generally used as a phosphor for emitting red light, are used. A light source obtained by mixing light emission of two fluorescent lamps each coated with O ₃ : Eu (YOX) alone was set as a sample of the high efficiency new light source in which light emission was concentrated mainly in green and red bands. Next, the light of this light source is commonly used as a blue light-emitting phosphor having a light emission peak wavelength of 420 to 470 [nm] (Formula 3) (Sr, Ca, Ba) ₁₀
(PO ₄ ) ₆ Cl ₂ : Eu (SCA) or the emission peak wavelength is 4
The light emission of a fluorescent lamp coated with a single substance, Sr ₄ Al ₁₄ O ₂₅ : Eu (SAE), which is a general phosphor of blue-green emission existing at 70 to 530 [nm], is further mixed. The point at which the color was reduced was determined from a subjective evaluation experiment.

FIG. 6 shows the experimental results. Further, the positions on the xy chromaticity coordinates of the light colors of the fluorescent lamps using the phosphor alone are shown in FIG. 7 as LAP, 8 as YOX, 9 as SCA, and 10 as SAE.
As shown.

 Each xy chromaticity coordinate value is 7 LAP is x = 0.332, y = 0.4088 YOX is x = 0.596, y = 0.3299 SCA is x = 0.156, y = 0.79910 SAE is x = 0.152 and y = 0.356.

In FIG. 6, reference numeral 11 denotes the light mixing ratio of the green light emission (Chem. 1) and red light emission (Chem. 2), which is the high efficiency new light source sample, as LAP.
(Green): YOX (Red) = 100: 0, the result of mixing the blue (Chemical Formula 3) light and finding the point where the light source color starts to feel less colored is plotted. It is. 12
Plots the results of a similar subjective evaluation experiment performed at a light mixing ratio of LAP: YOX = 95: 5, and 13 plots the results of a similar subjective evaluation experiment performed at a light mixing ratio of LAP: YOX = 90: 10. What did
14 plots the results of a similar subjective evaluation experiment performed at a light mixing ratio of LAP: YOX = 85: 15, and 15 shows the results of a similar subjective evaluation experiment performed at a light mixing ratio of LAP: YOX = 80: 20. It is a plot.

From these results of 11 to 15, when a regression line is constructed, y = -0.43x + 0.58. However, since there is variation in the subjective evaluation, two decimal places of the intercept are included so that all plot points are included. The eyes were raised, and y <−0.43x + 0.60 (formula (1)).

This will be described in more detail in the description of the second embodiment of the present invention in which the high-efficiency new light source enhances the white color of the emitted light color.

Also, 16 in FIG. 6 shows that the light mixing ratio of the sample is LPA.
(Green): YOX (red) = 80:20, the light from the blue-green (Chemical Formula 4) phosphor is mixed, and the point at which the color of the lamp emission starts to feel less is determined. It is a plot of the results.

This result is also similar to the experiment of mixing the blue phosphor described above, and y <−0.43x + 0.60. As a result, it can be seen that the chromaticity is a main factor that determines the point at which whiteness starts to be felt rather than the band of mixed light colors. Equation (1) is a boundary at which the yellowish green color of the light from the high-efficiency new light source is switched to the greenish light color by increasing the light emission in the blue or blue-green band, that is, the opposite blueish color. And the sense of yellowness cancels out and the boundary where the color starts to decrease is represented.

The range of x> 0.16 indicates the allowable limit of the tint strength in the blue or blue-green direction. 9 and 10 in FIG.
It is a position on a chromaticity diagram when a fluorescent lamp is realized using the phosphor of formula (4). X> 0.16 is the chromaticity 9,
It is constructed in consideration of feasibility so as not to take in 10.

If the emission in the blue or blue-green band increases, the proportion contributing to the improvement of luminous efficiency in scotopic vision at equal illuminance (equal luminous flux) and mesopic vision, or in a large visual field can be increased. An increase in light emission in these bands essentially results in a decrease in the efficiency of the light source at the measured light quantity V (λ). In addition, the increase in the light emission in these bands relatively weakens the light emission in the red band, thereby deteriorating the appearance of red, which is used for important purposes such as danger indication.

Now, the amount of light emitted and the amount of light measured by the illumination are related via V (λ), and the monochromatic color at the peak of V (λ) is used.
lor) The light of 555 [nm] becomes the maximum 683 [lm / W]. The light other than 555 [nm] has a value smaller than 683 [lm / W], and the relationship shown in chromaticity coordinates is the theoretical efficiency of light on the xy chromaticity coordinates in FIG. .

From this, it can be seen that the theoretical efficiency of the light source decreases toward the lower right (blue or blue-green) direction on the xy chromaticity coordinates.

If the luminance is the same among the measured light amounts, the white light and the blue-green light should look the same brightness, but actually the colored light feels brighter than the white light. If the brightness perceived by the colored light is B and the luminance of the colored light is L, B / L changes on the xy chromaticity coordinates of the colored light. log (L)
+ F (F is a correction coefficient) corresponds to the brightness B, and the relationship between the correction coefficient F of the luminance and the position on the xy chromaticity coordinates is shown in FIG. Count F. The reason why the F must be added is that Abney's law (additive property is established for light fluxes having different spectra) is not strictly satisfied, and V (λ) which is the premise of the additive property is considered. Seems to be not perfect.

It can be seen that the rate of this correction increases in the lower right (blue or blue-green) direction. It can be seen from the present that V (λ) is underestimated in the blue or blue-green band, but the light color surrounded by the range on the xy chromaticity coordinates of the present invention is theoretically blue or blue-green. It covers the range of light colors that are underestimated.

FIG. 9 shows positions on the spectrum locus of a unique color. A unique color is a light stimulus having a wavelength that gives a color sensation of pure red, green, blue, and yellow stimuli when only a single spectrum of light wavelengths is extracted and viewed.

For example, when looking at light at a wavelength in the spectrum between the unique yellow and the unique green spectrum, both yellow and green are felt there.

FIG. 9 shows the connection between the unique colors red, green, blue, and yellow and the equal energy white W.

Theoretically, the light color within the xy chromaticity coordinates surrounded by unique yellow, unique green, and equal-energy white W feels yellowish and greenish, and separates from white to a bell-shaped monochromatic color (mono-color).
color) The closer to the position of the light, the stronger the color.

Theoretically, if the color difference from white is the same, the opposite colors of yellow and blue will antagonize on the line (L / N) connecting the unique green and white.

When the light source of the present invention is actually applied, the light emitting portion of the lighting fixture has an old impression with a light color in which the color is yellowish, so that the light in the region closer to the bluish side than the line connecting the unique green and white is used. Color is preferred.

The line (LN) is similar to the above-described subjective evaluation experiment line (Equation (1)), and it can be analogized that the result of the subjective evaluation experiment is supported by such a theory. It is considered that when the ratio of exceeds a certain amount with respect to the stimulation of the M and L cones, antagonism between yellowish and bluish occurs.

By implementing the chromaticity range of the present invention as described above, it is possible to realize a light source with high luminous efficiency and reduced intensity of color perceived for light colors.

It should be noted that, within this range, it is possible to set a light color in a range in which the sensation of close to white, yellowish green, and yellowish green is canceled by the sensation of bluish greenish, from the viewpoint of visual efficiency and light color. desirable.

This will be described in further detail in the description of the second embodiment of the present invention in which the high-efficiency new light source enhances the white color of the emitted light color.

When the light source of the present invention is realized as a fluorescent lamp, it is possible to concentrate light emission narrowly in a predetermined wavelength band by using a rare earth phosphor.

Further, as an example, a phosphor that emits main light and has a peak emission wavelength range of 530 to 580 [nm] is terbium or a phosphor activated by terbium and cerium, and 600 to 650 [ [nm] is a phosphor activated with europium or manganese, and has a light emission peak wavelength of 420 to 530 [nm] and a light emission peak wavelength of 470 to 530 [nm]. The phosphor to be used is europium, or phosphor activated with europium and manganese, or antimony, or manganese, or antimony and manganese.

Further, as a specific example of a phosphor, a phosphor having an emission wavelength peak range of 530 to 580 [nm] is (Chemical Formula 1) La
PO ₄ : Ce, Tb, (Chemical Formula 5) CeMgAl ₁₁ O ₁₉ : Tb, (Chemical Formula 6) (Ce, G
d) MgB ₅ O ₁₀ : Tb or (Chemical formula 7) La ₂ O ₃・ 0.2SiO ₂・ 0.9P
_{There are 2} O ₅ : Ce, Tb, and the phosphor of 600 to 650 [nm] is (2) Y
₂ O ₃ : Eu or (Formula 8) (YGd) ₂ O ₃ : Eu. These phosphors with main emission wavelengths are PCT / JP96 / 02618: Light
Source.

As an example of the phosphor having an emission peak wavelength of 420 to 530 [nm], the phosphor having a peak wavelength of 420 to 470 [nm] may be (Chemical Formula 9) BaMgAl ₁₀ O ₁₇ : Eu or ,
(Chemical Formula 3) (Sr, Ca, Ba) ₁₀ (PO ₄ ) ₆ Cl ₂ : Eu. Many of these phosphors can be considered to have similar constitutions, but within the scope of the present invention, Mg-added (Sr, Ca, Ba, Mg) ₁₀ (P
O ₄ ) ₅ Cl ₂ : Eu is also included.

Further, the phosphor having an emission peak wavelength range of 470 to 530 [nm] is (Chemical Formula 4) Sr ₄ Al ₁₄ O ₂₅ : Eu or (Chemical Formula 11) Ce
(Mg, Zn) Al ₁₁ O ₁₉ : Mn.

By forming a phosphor layer using two phosphors having emission peak wavelengths at 420 to 470 [nm] and 470 to 530 [nm] at the same time, light emission at 420 to 530 [nm] can be realized. Further, in this case, it is possible to simultaneously improve the luminous sensation of the scotopic vision, the mesopic vision, and the large visual field, and efficiently improve the white sensation.

Here, 420-530 as another embodiment of the phosphor to obtain light emission of [nm] (of 12) (Ba, Sr) MgAl 10 O 17: Eu, is Mn. Note that the scope of the present invention also includes BaMgAl ₁₀ O ₁₇ : Eu, Mn in which the addition of Sr has been eliminated. Increasing the Eu concentration in the activator enhances the emission of 420 to 470 [nm],
If the concentration of Mn is increased, light emission of 470 to 530 [nm] can be realized.

In this case, 420-470 [nm], 470-530 [nm]
Since the emission ratio of [nm] can be set, the color tone can be easily set when manufacturing the lamp, and color unevenness can be suppressed.

The phosphor in the range of peak emission wavelength is 530~580 [nm] (of 14) (Ce, Gd, Tb ) (Mg, Mn) B 5 O 10, 600~650 [nm]
By using (Ce, Gd) (Mg, Mn) B ₅ O ₁₀ as the phosphor of the formula, the base material of the phosphor is made the same, and 53
Since the light emission ratio of 0 to 580 [nm] and 600 to 650 [nm] can be set, the color tone can be easily set in lamp production, and color unevenness can be suppressed.

The phosphor having an emission peak wavelength of 420 to 530 [nm] is a halophosphate calcium phosphor (Chemical Formula 16) Ca ₅ (P
By using O ₄ ) ₃ (F, Cl): Sb, Mn, the fluorescent lamp of the present invention can be manufactured at low cost. In this phosphor, Mn of the activator is yellow, and Sb of the activator has an emission peak in bluish green.
If the density of is increased, the light in the bluish green band increases. In particular, the claims of the present invention include a case where Mn is eliminated, and in this case, a single-peak light emission having a blue-white light color is obtained.

 Next, a second embodiment of the present invention will be described.

In the second embodiment of the present invention, the color of the emitted light color of the high-efficiency new light source is reduced to enhance the white appearance.

In the second embodiment of the present invention, mainly 420-470
Increasing the wavelength in the [nm] range minimizes the addition of light outside the main emission wavelength range of 530 to 580 [nm] and 600 to 650 [nm], while minimizing the emission of high efficiency new light sources. It reduces the tint of light color and enhances whiteness. Therefore, unlike the first embodiment of the present invention, mainly 420 to 470
Emission is added to the wavelength in the blue band in the [nm] range. Further, specific embodiments of the phosphor conform to the first embodiment.

Here, by adding a spectrum on the shorter wavelength side than in the first embodiment, it is possible to greatly change the light emission color of the light source with the addition of a minimum amount of auxiliary light.

Specifically, in the same subjective evaluation experiment as in the first embodiment of the present invention, first, LaPO ₄ : Ce, Tb (LAP), which is generally used as a green light emitting phosphor, and general the phosphor of the light emitting (of ₂₎ Y 2 O _3: Eu were mixed light of each emission of the two fluorescent lamps (YOX) were respectively applied alone, the mixed light light sources, mainly green And a sample of the high-efficiency new light source in which light emission was concentrated in the red band. Next, a general (Chemical Formula 3) (Sr, Ca, Ba) ₁₀ (PO) is used as a blue-emitting phosphor having an emission peak wavelength of 420 to 470 [nm].
₄ ) The light emitted from a fluorescent lamp coated with ₆ Cl: Eu (SCA) alone was mixed, and the point at which the color was reduced and the whiteness was enhanced was determined by the adjustment method.

In the subjective evaluation experiment, the subjects were four adults having normal color vision, and the number of repetitions of one condition was set to three.

The light mixing ratio of green light emission (Chem. 1) and red light emission (Chem. 2) set as a sample of the high-efficiency new light source is LAP (green): YO
X (red) = 100: 0, LAP (green): YOX (red) = 95: 5, LAP
(Green): YOX (red) = 90:10, LAP (green): YOX (red) = 85: 1
5, LAP (green): YOX (red) = 80:20, changed in 5 steps. The xy chromaticity value, correlated color temperature, and Duv at this time are shown in (Table 1).

(Table 2) shows the average value of the light mixing ratio [%] of LAP: YOX: SCA at which the test subject began to feel less colored and white, using the light source (la) : Xy chromaticity value, correlated color temperature, and Duv are shown as the light source (le) from the light source (le).

Next, FIG. 10 shows the light source 17 (la) on the xy chromaticity coordinates.
Xy chromaticity value of the light source 21 (le) and its regression line 22 (y = −
0.43x + 0.58). The xy of the light sources (la) to (le)
In order to include all the chromaticity values, a straight line 23 obtained by raising the second decimal place of the intercept and translating the regression line is shown. Incidentally, the hatched portion 24 indicates the scope of the second and third aspects of the technology related to the present invention.

FIG. 11 shows a second example of the technology related to the present invention for comparison.
Chromaticity values (x, y) of a few inventions = a: (0.228,0.351), b: (0.
358,0.551), c: (0.525,0.440), d: (0.453,0.440), e:
(0.285, 0.332), the relationship between the straight line 23 (y <−0.43x + 0.60) and the color name of the light source color.

The fluorescent lamp according to the present invention is applied to a straight line y <-0.43x + 0.60 in FIG.
By setting it in the following range, it is possible to realize a fluorescent lamp having a light color tone and a white feeling.

Next, LAP, YO when the light sources corresponding to the light sources (la) to (le) in (Table 2) were actually manufactured as 20 W fluorescent lamps.
The mixing ratio of the weights of the X and SCA phosphors, the xy chromaticity value, the correlated color temperature, and Duv are shown in Table 3 as a light source (lf) to a light source (lj).

At this time, FIGS. 12 to 16 show the spectral distributions of the light sources (lf) to (lj) which are the examples in the 20 W fluorescent lamp.

These spectral distributions are compared with the embodiment in which a high efficiency new light source having the spectral distribution shown in FIG. 17 is realized by a fluorescent lamp.
There is a relative spectral power due to a phosphor having an emission peak in a wavelength band of 420 to 470 [nm], and the addition of this wavelength band can reduce the color and enhance the white appearance.

In addition, along with the improvement of the white feeling, the improvement of the luminous sensation of scotopic vision, mesopic vision and large visual field can be expected at the same time.

(Table 4) is based on the light mixing ratio based on the luminous flux ratio of the fluorescent lamp having three types of single phosphors of (Table 2).
The light mixing ratio of only LAP and SCA of the light sources (la) to (le) is shown by the luminous flux ratio. From now on, almost everything will be LA
The light mixing ratio [%] of P and SCA is 96: 4.

Further, the chromaticity points (0.285,0.
332) is the point on the blue side, and is the point at which the light mixing ratio of SCA is maximized.

The luminous flux ratio [%] of LAP, YOX and SCA at that chromaticity point is calculated from the chromaticity value of a single-color fluorescent lamp having three types of single phosphors to be mixed, based on the additive color mixing formula.
81: 9: 10. At this time, the light mixing ratio [%] of only LAP and SCA is 89:11.

Thus, the peak of the emission wavelength of SCA or the like is 420 to 470 [n
m] and the emission wavelength peak of LAP etc. is 530-580.
In the light mixing ratio [%] B: G of the phosphor at [nm], B
Is set to 4 to 11 [%] and G is set to 96 to 89 [%], it is possible to realize a fluorescent lamp having a light color tone and a white appearance.

In the chromaticity range of the present invention, the chromaticity point at which the light mixing ratio [%] of YOX is the maximum is a straight line y = −0.43x + 0.60.
And the straight line y = 0.150 + 0.64x. At this intersection
The light mixing ratio [%] of LAP, YOX, and SCA is 70: 28: 2 when calculated based on the additive color mixing formula. Thus, the luminous flux R emitted from a phosphor such as SOX having a peak at an emission wavelength of 420 to 470 [nm] is compared with the luminous flux R emitted from a phosphor having an emission peak at an emission wavelength of 600 to 650 [nm] such as YOX. The luminous flux ratio [%] of the sum B + G with the luminous flux emitted from a phosphor such as LAP having an emission peak at a wavelength of 530 to 580 [nm] is represented by R:
B + G, R = 0-28 [%], B + G = 100-72 [%]
By doing so, it is possible to realize a light color having a light color tone and a white feeling with high efficiency while obtaining categorical color perception.

Next, FIG. 18 shows chromaticity values (x, y) = a: (0.228, 0.351), b: (0.358, 0.55) of the second and third aspects of the technology related to the present invention.
1), c: (0.525,0.440), d: (0.453,0.440), e: (0.285,
0.332), a chromaticity range 25 defined by y <−0.43x + 0.60, a fluorescent lamp 26 having a phosphor of LAP alone, and a light source (lk) coated with a daylight halophosphate phosphor. ) Xy chromaticity value of 27, light source (ll) coated with a neutral white halophosphate phosphor, and light source (lm) 29 coated with a white halophosphate phosphor
And xy chromaticity values are shown on xy chromaticity coordinates. By combining the light source 26 and any of the light sources (lk) 27 to (lm) 29 to mix light, dotted lines (1) 30, (2) 3
1, (3) A light source with 32 xy chromaticities can be created,
A light source having a chromaticity range of 25 according to the present invention can be realized.

Next, in a 20W fluorescent lamp, the light source of the embodiment (lf)
~ (Lj), a new fluorescent lamp with the spectral distribution shown in FIG. 11,
And a conventional halophosphate phosphor white fluorescent lamp and 3
Table 5 shows a comparison of the lamp efficiencies of the wavelength range light-emitting day-white fluorescent lamps.

The lamp efficiency of the light sources (lf) to (lj) is improved by about 24 to 43% compared to the conventional halophosphate phosphor white fluorescent lamp, and compared to the conventional three-wavelength range daylight white fluorescent lamp. , About 10-35%, and a highly efficient fluorescent lamp can be realized.

 Next, a third embodiment of the present invention will be described.

In the third embodiment of the present invention, a light color image equivalent to a bulb color is given to the emission light color of the high efficiency new light source.
The specific embodiment of the phosphor conforms to the first embodiment.

The embodiment of the present invention is realized based on experimental data obtained by subjectively evaluating whether or not the light color of the light source is acceptable as the bulb color.

In this experiment, two light-emitting portions having a visual angle of 2 ° were simultaneously presented in a dark visual field, one of which was a test stimulus, and one was a reference stimulus.

As the test stimulus, 21 kinds of light colors from t1 to t21 shown in FIG. 19 can be randomly presented. Each test stimulus
(Chemical Formula 1) LaP ₂ O ₄ : Ce, Tb phosphors emitting green light (LAP), (Chemical Formula ₂ ) Y ₂ O ₃ : Eu phosphors emitting red light (YOX), (Chem. 3) (Sr, Ba, Ca) ₁₀ (PO ₄ ) ₆ C
l ₂ : Eu phosphor with blue emission fluorescent lamp (SCA), emission peak wavelength 580 [nm] and xy chromaticity value (0.515, 0.472)
The setting was made by changing the light mixing ratio between the pure yellow light emitting fluorescent lamp and the pure yellow light emitting fluorescent lamp. The characteristics of each test stimulus are shown in (Table 6).

The reference stimulus is an incandescent light bulb (correlated color temperature 2800K,
xy chromaticity values (0.452, 0.406)).

In the realization, the test stimulus is randomly presented to the subject,
As a light bulb comparison standard for the reference stimulus, the light color of the test stimulus was evaluated by the choice of "whether or not the light bulb color is acceptable".

The same conditions were repeated three times, and seven subjects had normal color vision.

In addition, although the luminance of each light emitting portion was set to two kinds of 3000 cd / m ² and 300 cd / m ² , as a result of the experiment, no difference was observed in light color evaluation between the two kinds of luminance.

FIG. 20 shows, with a decimal point, the percentage of responding that the light bulb color is acceptable, for each xy chromaticity point of each test light source. Curve 23
Is the permissible probability that 50% is acceptable as bulb color
% Regression curve. That is, the range within the curve 23 is a range of light colors in which a majority or more are acceptable as bulb colors.

l: (0.4775,0.4283), m: (0.4594,0.3971), n: (0.42
14,0.3887), o: (0.4171,0.3846), p: (0.3903,0.371
9), q: (0.3805,0.3642), r: (0.3656,0.3905), s: (0.
3938,0.4097), t: (0.4021,0.4076), u: (0.4341,0.423
3), v: (0.4348, 0.4185), the l-v range in FIG.
The scope of the tenth aspect of the technology related to the present invention, wherein the curve
The relationship with 23 is shown.

The l-v range defines the upper and lower limit lines near the blackbody radiation locus, and indicates the range of the light color of the conventional lamp obtained from the JIS method in which the limit line is defined as an allowable range. ,
The chromaticity classification of fluorescent lamps specified by IEC is included in this range. An eleventh invention related to the present invention is a range obtained by removing the l to v ranges from the curve 23.

In addition, the straight line 24 indicates a fluorescent lamp composed of only an LAP phosphor having an emission peak at an emission wavelength of 530 to 580 [nm] and a YOX phosphor having an emission peak at an emission wavelength of 600 to 650 [nm]. This shows the change in chromaticity when the light flux ratio of LAP: YOX is changed.

25 is LAP: YOX = 70: 30 chromaticity and correlated color temperature is about 3500
[K] · Duv is about 19, 26 is chromaticity of LAP: YOX = 65: 35 and correlated color temperature is about 3100 [K] · Duv is about 12, 27 is LAP: YOX = 60: 4
At a chromaticity of 0, the correlated color temperature is about 2800 [K]. Duv is about 6, and 28 is
LAP: YOX = 55: 45 chromaticity and correlated color temperature is about 2600 [K] ・ Du
v is about 1.

From this, the main emission wavelengths are 530-580 [nm] and 600-6
Using a correlated color temperature as an index for a fluorescent lamp of 50 [nm], about 3500 [K] is a light color image similar to a light bulb,
This is the boundary between white and light color images.

Next, for reference, FIG. 22 shows a tenth technique related to the present invention.
1 shows the relationship between the chromaticity of 1 to v of the invention and the range of the light color of a JIS fluorescent lamp.

In FIG. 22, 29 is white, 30 is warm white, and 31 is the chromaticity range of the fluorescent lamp of bulb color. It can be seen from the figure that vertices other than the lower left of the chromaticity range of white correspond to l to v.

Further, as shown in FIGS. 25 to 28 in FIG. 21, the spectral distribution of the embodiment of the fluorescent lamp when the luminous flux ratio of LAP: YOX is changed is shown in FIGS. 23 to 26.

One example of providing a light color image equivalent to a light bulb color to the light color of the light emitted from the high efficiency new light source of the present invention is a light emission peak wavelength.
LaP ₂ O ₄ : Ce, Tb as a phosphor of 540 to 560 [nm]
Change of LAP and YOX of Y ₂ O ₃ : Eu as a phosphor having an emission peak wavelength of 600 to 620 nm from LAP: YOX = 60: 40 to LAP: YOX = 70: 30 in luminous flux ratio It was made.

When the luminous flux ratio is LAP: YOX = 70: 30, the efficiency can be improved by 10% while reducing the number of types of phosphors as compared to the conventional three-wavelength-range fluorescent lamp bulb color.

FIG. 27 shows another embodiment of the present invention.
As a phosphor of 0 to 460 nm, the composition is (Chemical Formula 3) (Sr, Ba, Ca) ₁₀
(PO ₄ ) ₆ Cl ₂ : Eu, SC A, and a phosphor with an emission peak wavelength of 540 to 560 nm, the composition of which is LaP ₂ O ₄ : Ce, Tb, and a phosphor with an emission peak wavelength of 600 to 620 nm. There Y ₂ O _3: shows the spectral distribution of a fluorescent lamp and YOX of Eu and configured by the light flux ratio of 1:67:32.

The xy chromaticity values of the fluorescent lamp are (0.4315, 0.4334),
Correlated color temperature is 3317K, DUV is 12.3, and by adding secondary emission in addition to the main emission wavelength, it is possible to produce an arbitrary light color in the chromaticity range of the tenth and eleventh inventions related to the invention. This is one embodiment.

In realizing a high-efficiency new light source, in addition to the above-described embodiment using a fluorescent lamp, a similar effect can be obtained by realizing a light color equivalent to that of the fluorescent lamp of the present invention with a metal halide lamp. , Minimum, luminous brightness in scotopic vision and mesopic vision, or large field of vision, while ensuring color reproducibility that allows classification of red, green, blue, yellow, white, and black surface colors High feeling,
Metal halide lamp.

The second is that when used in combination with a conventional high color temperature light source, while ensuring color reproducibility that allows classification of red, green, blue, yellow, white, and black surface colors at a minimum. A metal halide lamp with a light white color with little light color discomfort.

Thirdly, when used in combination with a conventional low color temperature light source, while ensuring color reproducibility that allows classification of red, green, blue, yellow, white, and black surface colors at a minimum. A metal halide lamp that is a highly efficient illumination light source with a light color that is less uncomfortable and the light color is equivalent to that of a light bulb.

Can be realized.

In the case of metal halide lamps, metal halides (metal halides) having main emission wavelengths in the range of 530 to 580 [nm] and 600 to 650 [nm] include metal halides emitting in the range of 420 to 530 [nm] ( Metal halide), and
The present invention can be realized by adding a metal halide (metal halide) that emits light at 470 to 530 [nm]. In general metal halide lamps are In (blue emission)-Tl (green emission)-
Na (yellow / red emission) lamps are often used,
The present invention can be realized by a combination of these inclusions in which the amount of In is increased to increase the component of blue light emission.

Also, (Chemical Formula 17) NaI.AlCl ₃ or (Chemical Formula 18) CaI ₂ .Al
The present invention can be realized by a combination of Cl ₃ and a metal halide of thallium (for example, metal iodide of thallium).

Another common metal halide lamp is Sc-
Although there is a Na- (Th) system, the present invention can be realized by encapsulating a metal halide of thallium (for example, metal iodide of thallium).

In addition, a Ce-Na-Cs- (Sm) -based material (for example, these iodides) with a reduced amount of Sm and a reduced blue light-emitting component, or a metal halide of thallium (for example, thallium It is also possible to realize the present invention by combining metal iodide.

From the above, the present invention provides a high-efficiency new light source, first of all, while ensuring color reproducibility capable of classifying the surface colors of red, green, blue, yellow, white, and black at a minimum. Light source with high luminous brightness in scotopic vision and mesopic vision, or in a large field of view.

The second is that when used in combination with a conventional high color temperature light source, while ensuring color reproducibility that allows classification of red, green, blue, yellow, white, and black surface colors at a minimum. A light source with a light color that is less uncomfortable and has a white color.

Thirdly, when used in combination with a conventional low color temperature light source, while ensuring color reproducibility that allows classification of red, green, blue, yellow, white, and black surface colors at a minimum. A light source that is a highly efficient illumination light source with a light color that is less unnatural and the light color is equivalent to a light bulb color.

As an improvement.

The present invention is designed to be used where color fidelity is not important.
It is highly likely to be put to practical use as an efficiency-oriented light source. For example, it is particularly promising as a light source for outdoor lighting, such as outdoor lighting, road lighting, and street lighting. It can be used for vehicle lighting, tunnel lighting, plaza lighting, garage lighting, warehouse lighting, factory lighting, etc.

Further, by applying the light source of the present invention to a place where the fidelity of color appearance is not emphasized and a place used at low illuminance, it is possible to use the light source in a viewing environment from scotopic vision to mesopic vision. Thus, the effects of the present invention can be effectively obtained.

The present invention relates to a high-efficiency new light source having a visible band emission wavelength range of 420 to 530 [nm] (more specifically, 420 to 470 [n]).
m], 470-530 [nm]), 530-580 [nm], 600-650 [n
m] is controlled.

Thereby, the following new effects can be satisfied.

First, at least categorical discrimination of the red, green, blue, yellow, and white colors of the surface color of the illuminated object while increasing luminous efficiency in scotopic vision and mesopic vision, or in a large visual field. Is to realize a highly efficient illumination light source.

Next, by realizing an illumination light source with a white color, while ensuring color reproducibility that allows classification of red, green, blue, yellow, white, and black surface colors at a minimum. is there.

Next, the third is the minimum, red, green, blue,
An object of the present invention is to realize a highly efficient illumination light source whose light color is equivalent to a bulb color while ensuring color reproducibility capable of classifying yellow, white, and black surface colors.

Even in a general light source, even in an environment with the same illuminance,
It has been empirically reported that a light source having a high correlated color temperature feels brighter. Also in this case, it is considered that the light source having a higher correlated color temperature emits more light in the blue or blue-green band.

Next, the effects of the present invention will be described based on a comparison between these general illumination light sources and the present invention.

The main objects of comparison are the three-band fluorescent lamps of the three-band fluorescent lamps: bulb color (3000K): EX-L, daylight white (5000K): EX-N, daylight (6700K): EX-D. In addition, as other comparison targets, a general white fluorescent lamp using a potassium halophosphate phosphor: FLW, an efficiency standard high-pressure sodium lamp: NH
1. Low pressure sodium lamp: NX, color rendering improved high pressure sodium lamp: NH2, fluorescent mercury lamp: HF, metal halide lamp: MHL.

The new high-efficiency light source: 2B (two-wavelength fluorescent lamp)
On the basis of this, in order to prevent the lamp efficiency from falling below 10%, (Chem. 3) (Sr, Ca, Ba) ₅ (PO ₄ ) ₃ C
l: El was added to carry out the present invention, 2B + SCA, and a halophosphate calcium phosphor (Chemical Formula 16) Ca ₅ (PO ₄ ) ₃ (F, Cl): Sb,
2B + halo W in which the present invention was carried out by adding Mn;
Examples of 2B + SAE in which the present invention is carried out by adding ₄ Al ₁₄ O ₂₅ : Eu are respectively exemplified. In general, the high-efficiency new light source (two-wavelength band fluorescent lamp) is 20 compared with a three-wavelength band fluorescent lamp.
Since the efficiency is higher than [%], the ordinary luminous flux also maintains a high advantage as compared with the three-wavelength-band fluorescent lamp. Here, separately, subjective brightness is considered.

In other words, V ′ (λ) / V (λ) is used as a representative of the indices to verify the effect of improving the luminous sensation in scotopic vision and mesopic vision, and is used in a large visual field such as a real environment. V ₁₀ (λ) / V (λ) is used as a representative index for verifying the effect of improving the visual brightness.

FIG. 28 shows the relationship between the value of V ′ (λ) / V (λ) and the various light sources. FIG. 29 shows the relationship between the value of V ₁₀ (λ) / V (λ) and the various light sources. It is shown.

From these data, the effect of improving the various luminous efficiencies by adding a phosphor to the high-efficiency new light source is small in a broadband light emission such as a white halophosphate calcium phosphor used in a general illumination light source. It can be seen that the phosphor that emits light in a relatively narrow band is larger. That is, 42
0-470 phosphor exhibiting relatively narrow band emission with a peak of emission in [nm] (of 3) (Sr, Ca, Ba ) 10 (PO 4) 6 Cl 2: Eu shows a sufficient improvement effect . Further, a phosphor having a relatively narrow band emission having an emission peak at 470 to 530 [nm] (Chemical Formula 1)
1) Sr ₄ Al ₁₄ O ₂₅ : Eu shows a great improvement effect.

Although the data of FIGS. 28 and 29 are meaningful only in their relative relationship, the data of 470-5
The effect of improving the various luminous efficiencies by adding the light emission of 30 [nm] is as follows: the bulb color: EX-L and the daylight color: EX-D of the three-band fluorescent lamp are set to the same illuminance. The effect of improving the difference between the brightness feeling of EX-L and the brightness feeling of EX-D, which is felt in the respective lighting environments, is shown.

These effects according to the present invention can be used in traffic lighting, street lighting, and security where low design illuminance is used in scotopic and mesopic conditions, and less strict color appearance is required, but energy saving and economic efficiency are prioritized. Widely applicable to fields such as lights, leftover lights, factory lighting of automated factories, and public lighting in places with little traffic.

At the same time, by enhancing the spectral distribution in the wavelength range of 420 to 530 [nm] in the present invention, it is possible to reduce the tint of light color and obtain a white feeling while maintaining the high efficiency of the new fluorescent lamp. it can.

Furthermore, in order to efficiently reduce the color tone of light and enhance the whiteness, 420 to 470 [nm] on the single wavelength side of the spectrum is used.
It is desirable to concentrate the light emission within the range of the light emission wavelength.

On the contrary, there is a case where a light color corresponding to a bulb color having a low correlated color temperature is desired from the viewpoint of design. In this case, the present invention clarifies the chromaticity range of the light color acceptable as the bulb color, thereby realizing a highly efficient light source in the chromaticity range.

Industrial Applicability As described above, when the new high-efficiency light source of the present invention is used in combination with a high color temperature light source, the development of light color variations of light colors with less discomfort and high whiteness, and low color temperature When used in combination with a light source, it becomes possible to develop a light color variation with a light color with less discomfort and a light color equivalent to a light bulb color.

────────────────────────────────────────────────── ─── Continuation of the front page Application for accelerated examination (56) References JP-A-58-66247 (JP, A) JP-A-10-21883 (JP, A) JP-A-10-116589 (JP, A) Patent 3076375 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01J 61/44

Claims (14)

(57) [Claims] 1. A fluorescent lamp for categorical color perception, which emits main light having a peak emission wavelength range of 530 to 580.
[Nm] and a phosphor having a wavelength in the range of 600 to 650 [nm], and the luminous flux of the phosphor having an emission wavelength in the range of 420 to 530 [nm] is used as the main emission wavelength. And the correlated color temperature of the lamp light color is 3500 to ∽ [K], Duv (distance from perfe
ct radiator locus on uv co-ordinates) is 5 to 70, provided that JIS Z9112-1976 and JIS Z9112-19
It is characterized by excluding the range of the limit chromaticity coordinates described in Table 1 of 83, wherein the peak range of the emission wavelength is 42
Compared to the case where no phosphor at 0 to 530 [nm] is present, the luminous efficiency in scotopic vision and mesopic vision or in a large visual field is higher, and at least the surface colors of the illuminated object are red, green, Blue,
A fluorescent lamp capable of categorizing yellow and white colors. 2. A fluorescent lamp for categorical color perception, wherein said lamp emits main light and has a peak emission wavelength range of 530 to 580.
[Nm] and a phosphor having a wavelength of 600 to 650 [nm], and the luminous flux of the phosphor having an emission wavelength peak range of 470 to 530 [nm] is converted to the main emission wavelength. And the correlated color temperature of the lamp light color is 3500 to ∽ [K], Duv (distance from perfe
ct radiator locus on uv co-ordinates) is 5 to 70, provided that JIS Z9112-1976 and JIS Z9112-19
It is characterized by excluding the range of the limit chromaticity coordinates described in Table 1 of 83, and the range of the peak of the emission wavelength is 47
Compared to the case where no phosphor at 0 to 530 [nm] is present, the luminous efficiency in scotopic vision and mesopic vision or in a large visual field is higher, and at least the surface colors of the illuminated object are red, green, Blue,
A fluorescent lamp capable of categorizing yellow and white colors. 3. A fluorescent lamp for categorical color perception, wherein a peak range of an emission wavelength is 420 to 530 [nm],
580 [nm], 600-650 [nm], and y <−0.43x + 0.60, y> 0.64x in xy chromaticity coordinates
+ 0.15, x> 0.16, provided that JIS Z9112-1976
And Table 1 of JIS Z9112-1983,
It is characterized by having a light color excluding within the range of the limit chromaticity coordinates, compared with the case where there is no phosphor having the above-mentioned emission wavelength peak range of 420 to 530 [nm]. High luminous efficiency in mesopic or large field of view, at least,
A fluorescent lamp characterized in that categorical identification of red, green, blue, yellow, and white colors of the surface color of an illuminated object is possible. 4. A fluorescent lamp for categorical color perception, wherein the emission wavelength peak ranges from 470 to 530 [nm],
580 [nm], 600-650 [nm], and y <−0.43x + 0.60, y> 0.64x in xy chromaticity coordinates
+ 0.15, x> 0.16, provided that JIS Z9112-1976
And Table 1 of JIS Z9112-1983,
It is characterized by having a light color excluding within the range of the limit chromaticity coordinates, compared with the case where there is no phosphor having a peak range of the emission wavelength in the range of 470 to 530 [nm]. High luminous efficiency in mesopic or large field of view, at least,
A fluorescent lamp characterized in that categorical identification of red, green, blue, yellow, and white colors of the surface color of an illuminated object is possible. 5. A phosphor having a peak emission wavelength range of 530 to 580 [nm] for obtaining main light emission is terbium or a phosphor obtained by activating terbium and cerium, and 600 to 650.
The phosphor of [nm] is a phosphor activated with europium or manganese, and has an emission peak wavelength of 420 to 530 [nm].
4. The phosphor according to claim 1, wherein the phosphor present in the phosphor is europium, or europium and manganese, or antimony, or manganese, or phosphor activated with antimony and manganese. Fluorescent lamp. 6. A phosphor which emits main light and has a peak emission wavelength range of 530 to 580 [nm] is terbium or a phosphor obtained by activating terbium and cerium.
The phosphor of [nm] is a phosphor activated with europium or manganese, and has an emission peak wavelength of 470 to 530 [nm].
5. The phosphor according to claim 2, wherein the phosphor present in is a phosphor activated with europium, or europium and manganese, or antimony, or manganese, or antimony and manganese. Fluorescent lamp. 7. A peak wavelength range of 530 to 580 [nm].
And the phosphor at 600 to 650 [nm] is converted to (Ce, Gd, Tb) (M
g, Mn) and _{B 5 O 10, (Ce,} Gd) (Mg, Mn) B 5 O 10 of claim 1 to 6, characterized in that is realized by a phosphor which is constituted by a according to any one Fluorescent lamp. 8. The fluorescence according to claim 1, wherein the phosphor having an emission peak wavelength of 420 to 530 [nm] is a calcium halophosphate phosphor. lamp. 9. The fluorescent substance according to claim 2, wherein the fluorescent substance having an emission peak wavelength of 470 to 530 [nm] is a calcium halophosphate fluorescent substance. lamp. 10. A phosphor having an emission peak wavelength of 420 to 530 [nm] is BaMgAl ₁₀ O ₁₇ : Eu or (Sr, Ca, Ba)
_10. The fluorescent lamp according to claim 1, wherein the fluorescent lamp is ₁₀ (PO ₄ ) ₆ Cl ₂ : Eu or BaMgAl ₁₀ O ₁₇ : Eu, Mn. 11. A phosphor having an emission peak wavelength of 470 to 530 [nm] is Sr ₄ Al ₁₄ O ₂₅ : Eu or Ce (Mg, Zn) Al _11.
O ₁₉ : Mn, characterized in that:
10. The fluorescent lamp according to any one of 9. 12. A phosphor according to claim 1, wherein said phosphor has an emission peak wavelength of 420 to 470 [nm] and a phosphor having an emission peak wavelength of 470 to 530 [nm]. A fluorescent lamp according to any of the above. 13. A phosphor having an emission peak wavelength of 420 to 470 [nm] and a phosphor having an emission peak wavelength of 470 to 530 [nm] are (Ba, Sr) MgAl ₁₀ O ₁₇ : Eu, Mn. 13. The fluorescent lamp according to claim 12, wherein: 14. The lighting device according to claim 1, which is used for outdoor lighting, road lighting, street lighting, safety lighting, vehicle lighting, tunnel lighting, plaza lighting, garage lighting, warehouse lighting, or factory lighting. Fluorescent lamp.