JP2001060449A - Fluorescent lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a feeling of incompatibility on a luminescent color by having the luminescent color within a range where a specified correlated color temperature range, a specified Duv range and a range of chromaticity value (x, y) having a specified relationship in xy chromaticity coordinates are overlapped. SOLUTION: A fluorescent lamp for categorical color sensing obtains the main luminescence by a phosphor having the peaks of luminescent wavelength within a range of 530-580 nm and a range of 600-650 nm, and has the luminescent light within a range simultaneously satisfying that a correlated color temperature of 1700-∞ K, Duv (distance from perfect radiator locus on uv coordinates) is within a range of 5-70, and a chromaticity value (x, y) in xy chromaticity coordinates is within a range of a quadratic curve of fx2+gy2+hxy+ix+jy+k=0, f=0.6179, g=0.6179, h=-0.7643, I=-0.2205, j=-0.1765, k=0.0829. The green, blue, yellow and white surface colors of an object to be illuminated, can be categorically distinguished.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enables categorical identification of red, green, blue, yellow, white, and black surface colors, which are the basic colors of human color category judgment. The present invention relates to a highly efficient illumination light source while ensuring color reproducibility.

Among them, the present invention largely belongs to the following three technologies.

[0003] The first is that, at the minimum, color reproducibility that allows the classification of red, green, blue, yellow, white, and black surface colors is ensured, while scotopic vision and mesopic vision or large vision. The present invention relates to a fluorescent lamp and a metal halide lamp, which are highly efficient illumination light sources having high visual brightness.

[0004] Second, the color reproducibility that allows classification of red, green, blue, yellow, white, and black surface colors is secured at a minimum, and at the same time, it is used in combination with a conventional high color temperature light source. The present invention relates to a fluorescent lamp and a metal halide lamp having a light color with a little sense of incongruity in the light color.

[0005] Third, at least the color reproducibility that allows the classification of the surface colors of red, green, blue, yellow, white, and black is ensured, and at the same time it is used in combination with the conventional low color temperature light source. In this case, the present invention relates to a fluorescent lamp and a metal halide lamp, which are highly efficient illumination light sources having a light color that is less unnatural and the light color is equivalent to a bulb color.

[0006]

2. Description of the Related Art In a conventional lamp, spectral characteristics are designed by evaluating the fidelity of subtle color reproduction with respect to a reference light source (black body radiation / synthetic daylight) using an average color rendering index (Ra). On the other hand, it was evaluated by applying and developing the characteristics of color reproduction (categorical color perception) by which humans distinguished colors roughly, and the design of the spectral characteristics was optimized, and the Japanese application No. 242863 (September 21, 1995)
Sun), PCT / JP96 / 02618 based on it
There is.

As a result, the color reproducibility at which the classification of the surface colors of red, green, blue, yellow, white, and black, which are the basic colors of the human color category judgment, can be performed at a minimum (categorical color perception). , And 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.

The high-efficiency new light source which gives priority to the luminous efficiency of the light source while satisfying such a minimum color appearance,
It 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.

[0010] 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. As long as the appearance can be maintained, Duv takes a positive value.

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

Conventionally, the light color of a light source is described by IEC as an international standard for chromaticity classification of an illumination light source.
(International Electrotechnical Commission) standards. 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 defined in JIS (Japanese Industrial Standards) in Japan.

According to the IEC standard, a center point is determined in the vicinity of a black body radiation locus, a light color is determined with its tolerance, and the J
IS is a standard that defines upper and lower limit lines near the blackbody radiation locus and defines the limit line as an allowable range.

In particular, conventional lamps have been developed from the standpoint of evaluation of the conventional color rendering properties, with consideration given to preventing the lamp from deviating upward (Duv is positive) from the locus of black body radiation.

[0015]

However, in practice, the IE
The width of the allowable range of C is from 7.5 to 9.5 in the vertical direction of Duv, and the width of the allowable range of JIS is from 10 to 1
9, 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.

The CIE signal light color is defined as one of the conventional use ranges of the light source light color as white from different viewpoints. Among them, the light color is defined as a narrow range along the blackbody radiation locus. The plus side of Duv outside the white range is not used as a so-called white light in a conventional illumination light source.

The first problem to be solved by the present invention is:
It is an improvement in the luminous sensation of scotopic vision and mesopic vision of the high-efficiency new light source.

In a photopic state where the illuminance is high, the cones work in the photoreceptors of the eye, and in a scotopic state where the illuminance is low, the rods work out of the photoreceptors of the eye. It is known that both cones and rods work in an intermediate mesopic 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, when the above-mentioned high efficiency new light source is applied instead of the conventional light source aiming at faithful color reproduction, the illumination is designed with relatively low illuminance (scotopic vision, mesopic vision). It is a place to be.

Therefore, the first solution of the present invention is to design the spectral characteristics of the above-mentioned high-efficiency new light source by giving consideration to the influence of the rod and giving importance to a state of relatively low illuminance. Task to do.

The second problem to be solved by the present invention is as follows.
This is an improvement in the visual brightness of a large field of view of the high efficiency new light source.

In general, the illuminance and luminance are used as a measured light amount corresponding to the brightness. The spectral characteristics of the illuminance and luminance are based on the spectral characteristics of the brightness of a 2 [゜] visual field near or at the center of the eye. It was made. 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, setting the spectral characteristics of the above-mentioned high-efficiency new light source to improve the perceived brightness in a large field of view, which is perceived in an actual illumination field, is performed in a second way. It is an issue to be solved.

A third problem to be solved by the present invention is as follows.
This is an improvement in the white appearance of the emission color 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, the third object of the present invention is to enhance the white appearance of the high-efficiency new light source.

The fourth problem to be solved by the present invention is as follows.
The purpose is to give the high-efficiency new light source a light color appearance as a bulb color.

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

The present invention has been made in view of the above-mentioned problems of the conventional lamp, and when the high-efficiency new light source is used in combination with the conventional low color temperature light source, the new light source emits light of a light bulb color. It is an object of the present invention to provide an illumination light source capable of improving a sense of discomfort of a user.

[0029]

SUMMARY OF THE INVENTION The present invention is directed to improving the sense of brightness in mesopic and scotopic vision of the high efficiency new light source, and to improve the sense of brightness in a large field of view. The illumination light source has means for solving the following problems.

The present invention according to claim 1 is a fluorescent lamp for categorical color perception, which emits main light having a peak emission wavelength range of 530 to 580 [nm] and 600 to 65 nm.
It is obtained with a phosphor at 0 [nm], and the emission wavelength peak range is 4
The luminous flux of the phosphor in the emission wavelength range of 20 to 530 [nm] is 4 to 40 with respect to the total luminous flux in the main emission wavelength range.
%, The correlated color temperature of the lamp light color is 3500 to ∞ [K],
Duv (distance from perfect radiator locus on uv co
-ordinates) is 5 to 70, characterized by scotopic vision and mesopic vision, or while increasing the visual efficiency in a large field of view, at least the surface color of the illuminated object red, green, blue, yellow, A fluorescent lamp characterized in that categorical identification of white color is possible.

According to a second aspect of the present invention, there is provided a fluorescent lamp for categorical color perception, wherein the main light is emitted in the range of 530 to 580 [nm] and 600 to 65 nm in the peak of the emission wavelength.
It is obtained with a phosphor at 0 [nm], and the emission wavelength peak range is 4
The luminous flux of the phosphor in the emission wavelength range of 70 to 530 [nm] is 4 to 40 with respect to the total luminous flux in the main emission wavelength range.
%, The correlated color temperature of the lamp light color is 3500 to ∞ [K],
Duv (distance from perfect radiator locus on uv co
-ordinates) is 5 to 70, characterized by scotopic vision and mesopic vision, or while increasing the visual efficiency in a large field of view, at least the surface color of the illuminated object red, green, blue, yellow, A fluorescent lamp characterized in that categorical identification of white color is possible.

According to a third aspect of the present invention, there is provided a fluorescent lamp for categorical color perception, wherein a peak range of an emission wavelength is:
420-530 [nm], 530-580 [nm], 600-6
It is composed of a phosphor containing 50 [nm], and in xy chromaticity coordinates, y <−0.43x + 0.60, y> 0.64x +
It is characterized by having a light color in the range of 0.15, x> 0.16, and at least enhances the luminous efficiency in scotopic vision and mesopic vision or in a large visual field, and at least the red of the surface color of the illuminated object. , Green,
This fluorescent lamp is characterized by being capable of categorizing blue, yellow, and white colors.

According to a fourth aspect of the present invention, there is provided a fluorescent lamp for categorical color perception, wherein a peak range of an emission wavelength is:
470-530 [nm], 530-580 [nm], 600-6
It is composed of a phosphor containing 50 [nm], and in xy chromaticity coordinates, y <−0.43x + 0.60, y> 0.64x +
0.15, x> 0.16, having a light color in a range surrounded by a range, at least illuminated object while improving luminous efficiency in scotopic vision and mesopic vision or large visual field. This fluorescent lamp is characterized in that categorical identification of red, green, blue, yellow, and white colors of the surface colors is possible.

According to a fifth aspect of the present invention, a main light emission is obtained.
A phosphor having an emission wavelength peak range of 530 to 580 [nm] is terbium or a phosphor obtained by activating terbium and cerium, and a phosphor of 600 to 650 [nm] is attached with europium or manganese. A phosphor having an activated emission peak wavelength of 420 to 530 [nm],
Further, the phosphor having an emission peak wavelength at 470 to 530 [nm] is europium, or a phosphor activated with europium and manganese, or antimony, or manganese, or antimony and manganese. The fluorescent lamp according to claim 1.

According to a sixth aspect of the present invention, a phosphor having an emission wavelength peak in the range of 530 to 580 [nm] and 600 to 650 [nm] is used as (Ce, Gd, Tb) (Mg, Mn) B ₅ O ₁₀ and (Ce, Gd) (Mg, M
a fluorescent lamp according to claim 1, characterized in that is realized by a phosphor which is constituted by n) B ₅ O _10.

According to the present invention of claim 7, the emission peak wavelength is 4
7. The phosphor according to claim 1, wherein the phosphor present at 20 to 530 [nm] and the phosphor present at an emission peak wavelength at 470 to 530 [nm] are calcium halophosphate phosphors. It is a fluorescent lamp of description.

According to the present invention, the emission peak wavelength is 4
The phosphor existing at 20 to 530 [nm] is BaMgAl ₁₀ O ₁₇ : E
u or (Sr, Ca, Ba) ₁₀ (PO ₄ ) ₆ Cl ₂ : Eu or BaMgA
l ₁₀ O _{1 7:} Eu, it is a fluorescent lamp according to claim 1, characterized in that the Mn,.

According to the ninth aspect of the present invention, the emission peak wavelength is 4
The phosphor existing at 70 to 530 [nm] is Sr ₄ Al ₁₄ O ₂₅ : Eu,
7. The fluorescent lamp according to claim 1, wherein the fluorescent lamp is Ce (Mg, Zn) Al ₁₁ O ₁₉ : Mn.

According to a tenth aspect of the present invention, there is provided a phosphor having an emission peak wavelength of 420 to 470 [nm];
The fluorescent lamp according to any one of claims 1 to 9, further comprising a phosphor present at a wavelength of from 530 to 530 [nm].

According to the present invention, there is provided a phosphor having an emission peak wavelength in the range of 420 to 470 [nm];
The phosphor existing at ~ 530 [nm] is (Ba, Sr) MgAl ₁₀ O ₁₇ : E
11. The fluorescent lamp according to claim 10, wherein u, Mn. Next, when the high-efficiency new light source is used in combination with a conventional high color temperature light source, the illumination light source of the present invention has a means for solving the following problems in order to improve the white appearance of the emitted light color. Have.

According to a twelfth aspect of the present invention, there is provided a fluorescent lamp for categorical color perception, wherein the main light is emitted in a wavelength range of 530 to 580 [nm] and 600 to 6 nm.
It has a phosphor having an emission wavelength of at least 420 to 470 [nm] as a secondary emission wavelength and has a correlated color temperature of 3500 to ∞.
[K] and Duv (distance from perfect radiator loc
us on uv co-ordinates is in the range of 5 to 70, and the relationship between x and y is y <−0.43x + 0.60 on the xy chromaticity coordinates.
Fluorescent lamp, characterized in that at least red, green, blue, yellow, and white colors of the surface color of the object to be illuminated can be categorically identified while enhancing the whiteness of the emission color. It is. A thirteenth aspect of the present invention is a fluorescent lamp for categorical color perception, wherein the main light is emitted in the range of peak emission wavelengths of 530 to 580 [nm] and 600 to 650 [n].
m], and has at least a peak of the emission wavelength in the range of 420 to 470 [nm] as a sub-emission wavelength, and has a chromaticity value (x, y) = a: (0.228,0.351), b: (0.358,0.551), c: (0.5
25, 0.440), d: (0.453, 0.440), e: (0.285, 0.332), the relationship between x and y is in the range y <−0.43x + 0.60, and the white color of the emission color At least,
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.

According to a fourteenth aspect of the present invention, there is provided a fluorescent lamp for categorical color perception, wherein the main luminescence is obtained by a phosphor having an emission wavelength peak range of 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: (0.453,0.
440), e: In the range surrounded by (0.285, 0.332), the relationship between x and y is in the range of y <−0.43x + 0.60, and at least the object to be illuminated while enhancing the whiteness of the emission color. This fluorescent lamp is characterized in that categorical identification of red, green, blue, yellow, and white colors of the surface colors is possible.

According to a fifteenth aspect of the present invention, the auxiliary emission wavelength 420
The ratio [%] of the luminous flux emitted from the phosphor having an emission peak at about 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:
15. The fluorescent lamp according to claim 12, wherein G is B, 4 to 11%, and G is 96 to 89%.

The present invention according to claim 16 is characterized in that the emission wavelength is 600 to 600.
The luminous flux emitted from a phosphor having an emission peak at 420 to 470 [nm] and the luminous flux emitted from a phosphor having an emission peak at 650 [nm] are compared with the luminous flux emitted from a phosphor having an emission peak at 650 [nm].
The ratio [%] to the sum of the luminous flux emitted from the phosphor having an emission peak at 580 [nm] is R: (B + G), and R is 0 to 28.
The fluorescent lamp according to any one of claims 12 to 15, wherein [%] and B + G are set to 100 to 72 [%].

According to the present invention, a phosphor having an emission wavelength peak of 420 to 470 [nm] is activated by europium, and an emission wavelength peak of 530 to 580 [n].
m] is a phosphor activated with terbium or terbium and cerium, and the emission wavelength peak is 600 to
The phosphor at 650 [nm] is a phosphor activated with manganese or europium.
A fluorescent lamp according to any one of 2 to 16.

The invention of claim 18 is characterized in that the phosphor comprises a terbium-activated phosphor whose emission wavelength peaks at 530 to 580 [nm] and a halophosphate phosphor. The fluorescent lamp according to claim 14, wherein

According to a nineteenth aspect of the present invention, a phosphor having an emission wavelength peak range of 530 to 580 [nm] and 600 to 650 [nm] can be used as (Ce, Gd, Tb) (Mg, Mn) B ₅ O ₁₀ and (Ce, Gd) (Mg, Mn)
A fluorescent lamp according to any one of claims 12 to 17, characterized in that is realized by a phosphor which is constituted by B ₅ O _{1 0.}

According to a twentieth aspect of 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 BaMg
Al10O17: Eu, Mn.
20. The fluorescent lamp according to any one of 17 or 19.

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

According to a twenty-first aspect of the present invention, there is provided a fluorescent lamp for categorical color perception, wherein the main light is emitted in the range of 530 to 580 [nm] and 600 to 6 nm in the peak of the emission wavelength.
Obtained with a phosphor at 50 [nm] and have a correlated color temperature of 1700-∞
[K], Duv (distance from perfect radiator locus on
uv co-ordinates) is in the range of 5 to 70, and the 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 = -0.7643, i = -0.2205, j = -0.1765, k =
It is characterized by having the emission color in the range where the quadratic curve of 0.0829 overlaps with, and at least the categorical identification of the red, green, blue, yellow, and white colors of the surface color of the illuminated object is possible. There is provided a fluorescent lamp. The present invention according to claim 22 is a fluorescent lamp for categorical color perception,
The main light emission has an emission wavelength peak range of 530 to 58.
0 [nm] and 600 to 650 [nm].
The chromaticity value (x, y) at the xy chromaticity coordinates is fx ² + gy ² + hxy
+ ix + jy + k = 0, f = 0.6179, g = 0.6179, h = -0.7643, i = -0.2205,
From the range of the quadratic curve of j = -0.1765, k = 0.0829, the point l: (0.4775,0.4283), m: (0.4594,0.3971), n:
(0.4214,0.3887), 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: (0.4341,0.4233), v: (0.4
348, 0.4185), which is a range excluding the range (1 to v) connecting at least the surface color of the illuminated object,
This fluorescent lamp is characterized in that categorical identification of green, blue, yellow, and white colors is possible.

According to a twenty-third aspect of the present invention, there is provided a fluorescent lamp obtained from a phosphor having a main emission wavelength at 530 to 580 nm and an emission peak wavelength at 600 to 650 nm.
The ratio G: R (%) of the luminous flux emitted from the phosphor having a peak wavelength at 30 to 580 nm and the luminous flux emitted from the phosphor having an emission peak wavelength at 600 to 650 nm is as follows:
23. The fluorescent lamp according to claim 21, wherein G = 70-59 and R = 30-41.

According to a twenty-fourth aspect of the present invention, in 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, an auxiliary emission wavelength has an emission peak of 420 to 530 nm. 420-530 nm (B + BG) obtained from the existing phosphor, 5
The ratio of the luminous flux emitted from the phosphor having an emission peak at 30 to 580 nm (G) and 600 to 650 nm (R) (B + B
G): G: R (%) is B + BG = 0 to 3, G = 59 to 71, R =
The fluorescent lamp according to any one of claims 21 to 23, wherein the number is 41 to 26.

According to a twenty-fifth aspect of the present invention, the phosphor having a peak emission wavelength range of 530 to 580 [nm] is terbium or a phosphor obtained by activating terbium and cerium;
The phosphor of 600 to 650 [nm] is europium or
The fluorescent lamp according to any one of claims 21 to 24, wherein the fluorescent lamp is a phosphor activated with manganese.

According to a twenty-sixth aspect of the present invention, a phosphor having an emission wavelength peak range of 530 to 580 [nm] and 600 to 650 [nm] is used as (Ce, Gd, Tb) (Mg, Mn) B ₅ O ₁₀ and (Ce, Gd) (Mg, Mn)
A fluorescent lamp according to any one of claims 21 to 25, characterized in that is realized by a phosphor which is constituted by B ₅ O _{1 0.}

A twenty-seventh aspect of the present invention is used for outdoor lighting, road lighting, street lighting, safety light, vehicle lighting, tunnel lighting, plaza lighting, garage lighting, warehouse lighting, or factory lighting. Item 27 is a fluorescent lamp according to Item 1-26.

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

According to a twenty-eighth aspect of the present invention, there is provided a metal halide lamp having the same light color and emission spectrum as the fluorescent lamp according to any one of the first to twenty-sixth aspects.

The present invention according to claim 29 is used for outdoor lighting, road lighting, street lighting, safety light, vehicle lighting, tunnel lighting, plaza lighting, garage lighting, warehouse lighting, or factory lighting. Item 29. A metal halide lamp according to item 28.

[0059]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A high efficiency new light source is constructed by concentrating light emission mainly on the green and red wavelength bands, and at the minimum, red, green, blue, yellow,
Although it is intended to realize a highly efficient light source while ensuring color reproducibility capable of classifying the surface colors of white and black, the first embodiment of the present invention has a blue or blue-green wavelength. By adding light emission in the band, the luminous brightness in scotopic vision and mesopic vision and the luminous brightness in a large visual field are improved.

Next, a typical 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 characteristic with respect to the brightness of light differs depending on the spectrum, and this is called relative luminosity or relative luminosity function. Generally, 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, when the eyes are used to a dark place,
A standard scotopic relative luminous efficiency function (hereinafter referred to as V '(λ)) defined by the CIE (International Commission on Illumination) reflects the brightness sensitivity characteristics of rod photoreceptors in scotopic vision. This is known to have a center of sensitivity at 507 [nm].

It is said that mesopic vision, which is a state of brightness intermediate between photopic vision and scotopic vision, has an intermediate luminous efficiency characteristic between these, and these are the adaptation of the brightness of the environment to the eye. Change in state.

That is, in a scotopic or mesopic state,
There is the fact that the sensitivity is higher in the blue or blue-green band than photopic. 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 also been made to the conventional V (λ).

First, the Judd's modi colorimetric function (Judd's modi
fied colormaching functions) (V
_M (λ)). The reason for this correction is that V (λ) was underestimated in the short wavelength blue band. Although it is believed that V _M (λ) more accurately reflects the actual situation, it is also true that it is undesirable to change the photometric system, so this is referred to as “CIE Publication No. 86” (CIE Publication No. .86: 2 ゜ Spectral l
uminous efficiency function for photopic vision (1
990)), 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) which 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. There is V ₁₀ (λ) in the configuration. This is "SEI Publication 1964"
(CIE 1964 supplementary colorimetric standard
system).

The light reaching the eyes in a real environment is narrow
Not only from the field of view, but from a wide field of view
Me. Evaluating the sense of brightness from these large visual dimensions
Has V _TenIt is considered that (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 intermediate M
(Green) There are cones, but there are few S cones at the center or in the vicinity, and there are many S cones at the periphery of the center, so the larger the visual dimension, the higher the sensitivity for blue is estimated. Become.

There is no rod at the center, and V ′
Since (λ) itself is also a relative luminous efficiency composed of points deviated from the center, it is necessary to correct the brightness of the light source on the assumption that it is used at low illuminance such as scotopic vision or mesopic vision, and It can be seen that the blue or blue-green band has an important meaning in correcting the sense of brightness due to light entering the eyes from a large field of view under the environment.

Next, it was obtained by the illumination method that presents light of different light colors alternately to minimize flickering, and by the successive approximation method of obtaining light of slightly different light color by brightness matching. For V (λ) on which the result is based,
The relative luminous efficiency configured by a method of directly comparing brightness, called a direct matching method, will be described.

This is a direct extraction of the sense of visual brightness, and is described in “CIE Publication No. 75” (CIE Publication No. 75: Spectral lumi
nous efficiency functions based upon brightness ma
ching for monochromaticpoint sources 2 ゜ and 10 ゜ fi
elds (1988)) as determined by 2 [deg.] degree view of what is _{V b, 2 (λ),} 10 [ deg.] degree field of view as the V _{b, 10} (λ) are called in this case, It corresponds well to the direct brightness sensitivity of brightness, but does not draw a smooth profile.

However, this direct matching method also requires V
Looking at the difference between Vb, 10 (λ) and _{b, 2} (λ),
Larger values result in higher estimates of the sensitivity for blue.

These V ₁₀ (λ), V _M (λ), V
'(Λ), V _{b, 2} (λ), and V _{b, 10} (λ), respectively, better reflect the actual situation with respect to V (λ), but at times and occasionally, It is regarded as a light measurement of brightness, and is not used for evaluation and development of brightness of general lamps.

However, in view of the actual situation, when 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. is there.

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. The Figure _{2 V (λ), V 10} (λ), shows the _{V M (λ), V '} (λ). FIG. 3 shows that psychophysical (phyc
ophysical) V _{b, 2} (λ) and V _{b, 10} (λ)
Are shown, and V (λ) is shown for reference.

Based on this, FIG._{b, 10}(λ) and V
_{b, 2}(λ) difference, V_M(λ) and V (λ), V _Ten(λ) and V (λ)
= V_Two(λ), the difference between V '(λ) and V (λ)
Shown as the difference between various relative luminous sensitivities.

Taking these various relative luminous efficiencies into account, the positive side of this graph corresponds to the rate that was underestimated in the conventional V (λ), which concentrates on the blue or blue-green band. You can see that it is.

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 [nm], and the range within a peak ratio of 50 [%] is 460 to 460.
The range within 520 [nm] and peak ratio 80 [%] is 480-5.
05 [nm].

The peak of the difference between V _M (λ) and V (λ) is 435
[nm], peak ratio within 50% is 415-450
[nm] and the peak ratio within 80% are 420 to 445 [n].
m].

The difference between V ₁₀ (λ) and V (λ) = V ₂ (λ) has a peak of 500 [nm] and a range within a peak ratio of 50 [%] is 4 [nm].
The range within 65 to 515 [nm] and the peak ratio within 80 [%] is 48.
0 to 505 [nm].

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

Further, since the derivation method is different, direct comparison cannot be performed. 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 50 [%]. The range within is divided into 430 to 480 [nm] and 510 to 535 [nm] because of distortion of relative luminous efficiency. Here, the range within a peak ratio of 80% is 5%.
It is within 30 [nm] ± 2.5 [nm].

The peak of the difference between V _{b, 10} (λ) and V (λ) is 50
The range within 0 [nm] and the peak ratio within 50 [%] is 450 to 520.
[nm] and the peak ratio within 80% are 475 to 510 [n].
m].

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

Here, when these correction bands are combined at a wavelength equal to or less than the main emission wavelength range of the high-efficiency new light source, the maximum 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 455 [nm] mainly related to the S cone.
Since the following blue band correction, and many corrections on the visible light short wavelength side, the original sensitivity is absolutely small,
V _M (λ) and V (lambda) most effective area within the peak ratio of 80 [%] of the correction of non-difference is in the range of four hundred and seventy to five hundred and thirty [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, with the peak as 1. .

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

A general illumination light source aims at stimulating three types of cones (S cone, M cone, and L cone) that work in photopic vision. Stimulating mainly two kinds of cones (M cone and L cone) by focusing light emission mainly on the green and red bands, and stimulating mainly the visual r-g opponent color response system It is characterized by the following.

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 consideration. The improvement of visual perception in mesopic vision is characterized mainly by stimulating two types of cones (M cone, L cone) and rods,
In order to reduce the ratio of stimulating the S-cone having a small contribution to the brightness sensation and increase the efficiency of stimulating the rod, the emission wavelength to be added to the high-efficiency new light source is set to 470 to 530 [nm] blue-green. It is better to concentrate on the band.

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 luminous brightness in a large visual field 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 overlap, both the luminous brightness in scotopic vision and mesopic vision and the luminous brightness in large visual fields are improved. 4 wavelength bands
20 to 530 [nm]. However, since the relative luminous efficiency with respect to the original brightness is absolutely small on the short wavelength side of visible light, it is better to place more emphasis on 470 to 530 [nm] in order to efficiently improve both of them. good.

At least categorical discrimination of red, green, blue, yellow, and white colors of the surface color of the object to be illuminated is possible while enhancing the luminous efficiency in scotopic vision and mesopic vision or in a large visual field. To this end, it is desirable to enhance the blue or blue-green component of the lamp light color. 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 a 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 fluorescent lamp according to the present invention.
4) shows the range on the xy chromaticity coordinates of 4). These inventions
Y of FIG. 6 <−0.43x + 0.60, y of 4 in FIG.
> 0.64x + 0.15, x of 5 in FIG. 6> x of 0.16
This is realized by having a light color in a range surrounded by the y chromaticity range, and the reason is described below.

Y = 0.64x + 0.15 is based on the CIE document (CIE TECHNICAL REPORT CIE 107-1994; REIEW OF THE
OFFICIAL RECOMMENDATIONS OF THE CIE FOR THE COLOR
S OFSIGNAL LIGHTS.) Corresponds to the upper limit to the greenness of a white lamp, and the present invention provides an illumination that has a DUV on the positive side of the light generally used as white in FIG. It indicates that it is in the light area.

The range of y <-0.43x + 0.60 corresponds to the high efficiency new light source whose light emission is concentrated mainly in the green and red bands by visual experiment, and the light emission peak wavelength is in the range of 420 to 530 [nm]. This is a result of obtaining a point at which the tint is reduced by adding a fluorescent substance to be used or a fluorescent substance existing at 470 to 530 [nm].

As a representative example of the experiment, first, a green light was emitted.
LaPO which is commonly used as a phosphor_Four: Ce, Tb
(LAP) and a general (chemical compound) that emits red light
2) Y _TwoO_Three: Eu (YOX) was applied alone
A light source that mixes the light emitted from two fluorescent lamps
The high-efficiency new light source Sun, which concentrates light emission in the green and red bands
Set as pull. Next, the light of this light source
Fluorescence of blue light emission with wavelength of 420-470 [nm]
Common as the body (Chemical formula 3) (Sr, Ca, Ba)_Ten(PO_Four)₆Cl _Two:EU
(SCA) or an emission peak wavelength of 470 to 53
Commonly used as a blue-green light emitting phosphor existing at 0 [nm]
(Formula 4) Sr_FourAl₁₄O_{twenty five}: Fireflies coated with Eu (SAE) alone
The point where light emission of light lamps is further mixed to reduce color.
Was determined from a subjective evaluation experiment.

FIG. 6 shows the results of the experiment. Further, the xy of the light color of the fluorescent lamp using the phosphor alone is described.
In the figure, 7 is LAP, 8 is YO.
X and 9 are SCA and 10 is SAE.

Each xy chromaticity coordinate value is 7 for a LAP of x = 0.332, y = 0.408, a YOX of x = 0.596, y = 0.32929, and an SCA of x = 0.329. The SAE of 0.156 and y = 0.0079 is x = 0.152 and y = 0.356.

In FIG. 6, reference numeral 11 denotes a light-emitting ratio of LAP (green): YOX (red) = 100: 0, which is a high-efficiency new light source sample, with the luminous flux of green luminescence (Chem. 1) and red luminescence (Chem. 2). This is a plot of a result obtained by mixing blue (Chemical Formula 3) light into the thus-constructed light source and finding a point where the light source color starts to feel less colored. No. 12 is a similar subjective evaluation experiment.
P: YOX = 95: 5 is plotted, and FIG. 13 shows a similar subjective evaluation experiment performed with a light mixing ratio LAP: YOX.
= 90: 10 is plotted, and 14 is a similar subjective evaluation experiment, in which the light mixing ratio LAP: YOX = 85: 1.
The results obtained by plotting the results obtained in 5 and plotted in FIG. 15 are obtained by plotting the results of the same subjective evaluation experiment performed in a light mixing ratio of LAP: YOX = 80: 20.

From the results of 11 to 15, when a regression line is constructed, y = −0.43x + 0.58.
Because there is a variation in the subjective evaluation, the second digit after the decimal point of the intercept is rounded up to include all plot points,
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 whiteness of the emitted light color.

In FIG. 6, reference numeral 16 denotes a light-mixing ratio of LPA (green): YOX (red) = 80: 20, which is a sample, mixed with light from a blue-green phosphor. It is a plot of the result of finding the point at which the light starts to be felt and the color of the lamp emission color starts to feel less.

This result is similar to the experiment of mixing the blue phosphor, 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 yellow-green color of the high-efficiency new light source is switched to the blue-green color by increasing the emission in the blue or blue-green band, that is, the opposite blue 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. Reference numerals 9 and 10 in FIG. 6 denote positions on a chromaticity diagram when a fluorescent lamp is realized using the phosphors of (Chem. 3) and (Chem. 4). The above x>
0.16 is designed in consideration of feasibility so as not to capture the chromaticities 9 and 10.

If the emission in the blue or blue-green band increases,
Although the proportion contributing to the improvement of luminous efficiency in scotopic vision and mesopic vision or in a large visual field at equal illuminance (equal luminous flux) can be increased, the increase in light emission in these bands is essentially caused by photometry This leads to a decrease in the efficiency of the light source at 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 emitted light and the measured amount of illumination are V (λ)
And a single color (mo) at the peak of V (λ)
No-color light of 555 [nm] becomes 683 [lm / W] at the maximum. The light other than 555 [nm] has a value smaller than 683 [lm / W], and this relationship is shown in chromaticity coordinates in FIG.
Is the theoretical efficiency of light on the xy chromaticity coordinates of

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

Further, if the luminance is the same among the measured light amounts,
Both white light and bluish green light should look the same, but in fact colored light feels brighter than white light. Assuming that the brightness felt by the color light is B and the luminance of the color light is L, B / L changes on the xy chromaticity coordinates of the color light. log (L) + F (F is a correction coefficient) corresponds to the brightness B. The relationship between the correction coefficient F of the luminance and the position on the xy chromaticity coordinates is shown on the xy chromaticity coordinates in FIG. Is a correction coefficient F for the luminance of the image. The reason why the F must be added is that Abney's law (additive property is established for light beams 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. V
It can be seen that (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 underestimated in blue or blue-green. It covers the range of light colors that are overwhelmed.

FIG. 9 shows positions on the spectrum locus of a unique color. A unique color is a pure red, green,
It is a light stimulus with a wavelength that gives the color sensation felt by blue and yellow stimuli.

For example, when viewing light having a wavelength in the spectrum between the unique yellow and unique green spectra, 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 in 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 single color of a bell-shaped edge. (mono-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 bluish antagonize on the line (LN) connecting the unique green and white.

When actually applying the light source of the present invention,
Since the light emitting portion of the lighting fixture has an old impression with a light color that feels yellowish, a light color in an area closer to the bluish side than the line connecting the unique green and white is preferable.

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

As described above, by implementing the chromaticity range of the present invention, 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, setting the light color in a range in which the sensation of being close to white and yellowish green is canceled out by the sensation of bluish greenishness, requires visual efficiency and luminous efficiency. More desirable from a viewpoint.

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 in a predetermined wavelength band narrowly by using a rare earth phosphor.

Further, as an example, a phosphor which 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. The phosphor having a wavelength of ~ 650 [nm] is a phosphor activated with europium or manganese, the phosphor having an emission peak wavelength of 420 to 530 [nm], and the emission peak wavelength of 470 to 530 [nm]. The phosphor present in the] is europium, or europium and manganese, or antimony or manganese,
Or a phosphor activated with antimony and manganese.

Further, as specific examples of the phosphor, a phosphor having an emission wavelength peak range of 530 to 580 [nm] is (Chemical Formula 1) LaPO ₄ : Ce, Tb, and (Chemical Formula 5) CeMgAl ₁₁ O ₁₉ : T
b, (Chem. 6) (Ce, Gd) MgB ₅ O ₁₀ : Tb, or (Chem. 7) La ₂ O ₃ .0.
There are 2SiO ₂ · 0.9P ₂ O ₅ : Ce, Tb, and the phosphor of 600 to 650 [nm] is (Chemical formula 2) Y ₂ O ₃ : Eu or (Formula 8) (YGd) ₂ O ₃ : Eu
It is. These phosphors with main emission wavelengths are PCT / JP96
/ 02618: disclosed in Light Source.

As an embodiment of the phosphor having an emission peak wavelength of 420 to 530 [nm], the peak wavelength is 420
Phosphor existing at ~ 470 [nm] is (Chemical Formula 9) BaMgAl
₁₀ O _{1 7:} Eu or (reduction 3) (Sr, Ca, Ba ) 10 (PO 4) 6 Cl 2: is Eu. Many of these phosphors can be considered to have similar constitutions, but within the scope of the present invention, Mg is added (Chemical Formula 10) (Sr, C
a, Ba, Mg) ₁₀ (PO4) ₆ Cl ₂ : Eu.

The peak emission wavelength range is 470 to 5
The phosphor present at 30 [nm] is (Chemical Formula ₄ ) Sr ₄ Al ₁₄ O ₂₅ : Eu,
Or (Formula 11) Ce (Mg, Zn) Al ₁₁ O ₁₉ : Mn.

420 to 470 [nm], 470 to 530 [nm]
By forming a phosphor layer using two phosphors having emission peak wavelengths at the same time, light emission of 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, as another embodiment of another phosphor which emits light of 420 to 530 [nm], (Chemical formula 12) (Ba, Sr) MgAl ₁₀ O
₁₇ : There are Eu and 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 (Formula 13). If the concentration of Eu in the activator is increased, the emission of 420 to 470 [nm] is enhanced, and if the concentration of Mn in the activator is increased, it is 470 to 530.
[nm] emission can be realized.

In this case, one phosphor has 420 to 470
Since the emission ratio of [nm] and 470 to 530 [nm] can be set, the color tone can be easily set in lamp production, and color unevenness can be suppressed.

The emission wavelength peak ranges from 530 to 580.
(nm) phosphor (Ce, Gd, Tb) (Mg, Mn) B_FiveO_Ten ,
The phosphor of 600 to 650 [nm] is converted to (Chem. 15) (Ce, Gd) (Mg, M
n) B_FiveO _TenBy making the base material of the phosphor the same,
530-580 [nm], 600-650 [n] with one phosphor
m] emission ratio can be set.
The color tone can be easily set, and color unevenness can be suppressed.

The emission peak wavelength is 420 to 530 [n
m] is a halophosphate calcium phosphor (Formula 16) Ca ₅ (PO ₄ ) ₃ (F, Cl): Sb, Mn, so that the fluorescent lamp of the present invention can be manufactured at low cost. Become. In this phosphor, Mn of the activator is yellow and Sb of the activator has a light emission peak in blue-green, so that if the concentration of Sb is increased, light in the blue-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 light emitted from the high-efficiency new light source is reduced to enhance the white appearance.

In the second embodiment of the present invention, the wavelength mainly in the range of 420 to 470 [nm] is enhanced,
Main emission wavelength range of 530 to 580 [nm], 600 to
The purpose of the present invention is to reduce the color of the emitted light color of the high-efficiency new light source and increase the whiteness while minimizing the addition of light emission other than 650 [nm]. Therefore, unlike the first embodiment of the present invention, light emission is mainly added to the wavelength in the blue band in the range of 420 to 470 [nm]. 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, the emission light color of the light source can be changed.
With the addition of a minimum amount of sub-light emission, it is possible to make a large change.

Specifically, in the same subjective evaluation experiment as in the first embodiment of the present invention, first, general LaPO ₄ : Ce, Tb (LAP) as a green-emitting phosphor was used. ,
Y ₂ O ₃ : Eu which is general as a red-emitting phosphor
The mixed light source is mixed as a sample of the high-efficiency new light source in which light emission is mixed mainly in green and red bands by mixing light emitted from two fluorescent lamps each coated with (YOX) alone. did. Next, this general (of 3) as a phosphor for emission of blue emission peak wavelength exists in 420~470 [nm] (Sr, Ca , Ba) 10 (PO 4) 6 Cl: Eu ( SCA)
Was mixed with the light of a fluorescent lamp to which a single substance was applied, and the point at which the color was reduced and the white feeling was enhanced was determined by an adjusting 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 represented by L
AP (green): YOX (red) = 100: 0, LAP
(Green): YOX (red) = 95: 5, LAP (green): YO
X (red) = 90:10, LAP (green): YOX (red) =
85:15, LAP (green): YOX (red) = 80: 20
Up to five levels. The xy chromaticity value, correlated color temperature, and Duv at this time are shown in (Table 1).

[0141]

[Table 1]

Next, the results of the subjective evaluation experiment are shown in (Table 2).

[0143]

[Table 2]

Table 2 shows the light mixing ratio [%] of LAP: YOX: SCA at which the subject began to feel less colored and white.
Are shown by the luminous flux ratio, and each light source (la)
(Our note: El a, not 1a) from the light source (l
The xy chromaticity value, correlated color temperature, and Duv at this time are shown as e).

Next, FIG. 10 shows the xy chromaticity values of the light sources 17 (la) to 21 (le) on the xy chromaticity coordinates and the regression line 22 (y = −0.43x + 0.58). .
In addition, a straight line 23 obtained by moving up the second digit after the decimal point of the intercept and translating the regression line so as to include all the xy chromaticity values of the light sources (la) to (le) is shown. The hatched portion 24 indicates the scope of claims 13 and 14.

FIG. 11 shows a third embodiment for comparison.
14 chromaticity values (x, y) = 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 straight line 23 (y <−0.43x + 0.60), and the color name of the light source color.

The fluorescent lamp of the present invention is formed by a straight line y <− in FIG.
By making the range of 0.43x + 0.60 or less,
It is possible to realize a fluorescent lamp having a light color and little whiteness.

Next, when the light sources corresponding to the light sources (la) to (le) in (Table 2) were actually fabricated as 20 W fluorescent lamps, the mixing ratios of the weights of the phosphors of LAP, YOX, and SCA were calculated. The xy chromaticity value, the correlated color temperature, and Duv are assigned to the light source (l
f) to (Lj) are shown in Table 3 below.

[0149]

[Table 3]

At this time, FIG. 12 to FIG.
Light sources (lf) to (lj) which are embodiments of the W fluorescent lamp
Is the spectral distribution of

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

[0152] With this, it is expected that the luminosity of a scotopic vision, a mesopic vision, and a large visual field will be improved simultaneously with the improvement of the white sensation.

[0153]

[Table 4]

(Table 4) shows the three types of simple substance of (Table 2).
The light mixing ratio of only LAP and SCA of the light sources (la) to (le) based on the light mixing ratio based on the light flux ratio of a fluorescent lamp having two phosphors is shown as a light flux ratio. From this, almost all the light mixing ratio [%] of LAP and SCA is 96: 4.
It is.

The chromaticity points constituting the chromaticity range of the present invention
(0.285,0.332) is the point on the blue side, so S
This is the point at which the light mixing ratio of CA becomes maximum.

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

Thus, the light mixing ratio of a phosphor such as SCA having an emission wavelength peak at 420 to 470 [nm] and a phosphor such as LAP having an emission wavelength peak at 530 to 580 [nm] is shown.
[%] B: In G, B is 4 to 11%, and G is 96 to 89.
By setting [%], it is possible to realize a fluorescent lamp having a light color and little whiteness.

In the chromaticity range of the present invention, YOX
The chromaticity point at which the light mixing ratio [%] becomes maximum is a straight line y = −0.
43x + 0.60 and the straight line y = 0.150 + 0.64x
Is the intersection with The light mixing ratio [%] of LAP, YOX, and SCA at the intersection is 70: 28: 2 when calculated based on the additive color mixing formula. Thus, the luminous flux R emitted from a phosphor having an emission peak at 600 to 650 [nm], such as YOX, is compared with the emission wavelength 420 to 470 [nm].
Luminous flux emitted from a phosphor such as SCA having an emission peak and LA having an emission peak at an emission wavelength of 530 to 580 [nm]
Luminous flux ratio of the sum B + G with the luminous flux emitted from a phosphor such as P [%]
Is R: B + G, R is 0 to 28%, and B + G is 100 to 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 is a circuit diagram of the present invention.
4 chromaticity value (x, y) = a: (0.228,0.351), b: (0.358,0.
551), c: (0.525,0.440), d: (0.453,0.440), e: (0.285,0.33
2), 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 coated with a daylight halophosphate phosphor ( lk) xy chromaticity value of 27, xy chromaticity value of light source (11) 28 coated with a neutral white halophosphate phosphor, and light source (lm) 29 coated with a white halophosphate phosphor
And the xy chromaticity values are shown on the xy chromaticity coordinates. By combining the light source 26 and any of the light sources (lk) 27 to (lm) 29 to mix light, a dotted line (1) 3
A light source having an xy chromaticity of 0, (2) 31, and (3) 32 can be produced, and a light source having a chromaticity range of 25 of the present invention can be realized.

Next, in the 20 W fluorescent lamp, the light sources (lf) to (lj) of the embodiment, the new fluorescent lamp having the spectral distribution shown in FIG. 11, and the conventional white fluorescent lamp of the halophosphate phosphor were used. Table 5 shows a comparison of the lamp efficiencies of the three-wavelength region light-emitting daylight fluorescent lamps.

[0161]

[Table 5]

The lamp efficiencies of the light sources (lf) to (lj) are about 2 times that of the conventional halophosphate phosphor white fluorescent lamp.
A 4-43% improvement, about 10-35% improvement over a conventional three-wavelength-range day-light fluorescent lamp, 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 the light color of a light source is acceptable as a light bulb color.

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

The test stimuli were t1 to t21 shown in FIG.
21 colors of light can be presented at random.
The test stimuli were (Chemical Formula 1) a fluorescent lamp of LaP ₂ O ₄ : Ce, Tb emitting green light (LAP) and (Chemical Formula ₂ ) a fluorescent lamp of Y ₂ O ₃ : Eu phosphor emitting red light. (YOX) and (Chem. 3) (S
r, Ba, Ca) ₁₀ (PO ₄ ) ₆ Cl ₂ : Eu phosphor with a blue emission fluorescent lamp (SCA), an emission peak wavelength of 580 [nm] and x
It was set by changing the light mixing ratio of a fluorescent lamp emitting pure yellow light with a y chromaticity value of (0.515, 0.472). The characteristics of each test stimulus are shown in (Table 6).

[0167]

[Table 6]

An incandescent lamp (correlated color temperature 2800 K, xy chromaticity value (0.452, 0.406)) was presented as a reference stimulus.

In the experiment, the test stimulus was presented to the test subject at random, and the light color of the test stimulus was evaluated as an alternative to "light bulb color acceptable or not" as a light bulb comparison standard for the reference stimulus.

The same conditions were repeated three times, and the number of subjects was seven with normal color vision.

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

In FIG. 20, the percentage of responding that the color is acceptable as the bulb color is represented by a decimal point, and for each xy chromaticity point of each test light source,
Indicated. Curve 23 is a regression curve with a 50% tolerance probability that the majority is acceptable as a bulb color. In other words, the range within the curve 23 is the range of light colors in which the majority is acceptable as the bulb color.

L: (0.4775, 0.4283), m: (0.4594, 0.3971), n:
(0.4214,0.3887), 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: (0.4341,0.4233), v: (0.4
348, 0.4185) is the range of claim 21 of the present invention, and shows the relationship with the curve 23.

The above-mentioned l-v range defines the upper and lower limit lines in the vicinity of the blackbody radiation locus, and defines the limit line as the allowable range.
Shows the range of the light color of the conventional lamp obtained by the above method, and the chromaticity classification of the fluorescent lamp defined by the IEC is included in this range.

The present invention of claim 22 is a range obtained by removing the l-v range from the curve 23.

The straight line 24 has emission wavelengths 530-58.
For a fluorescent lamp composed of only a LAP phosphor having an emission peak at 0 [nm] and a YOX phosphor having an emission peak at an emission wavelength of 600 to 650 [nm], LAP: YO
The chromaticity change when the luminous flux ratio of X is changed is shown.

Reference numeral 25 denotes a chromaticity of LAP: YOX = 70: 30, and the correlated color temperature is about 3500 [K] .Duv is about 19, 26.
Is a chromaticity of LAP: YOX = 65: 35 and correlated color temperature is about 3100 [K] · Duv is about 12, and 27 is LAP: YOX.
= 60: 40 and correlated color temperature is about 2800 [K] · D
uv is about 6, 28 is chromaticity of LAP: YOX = 55: 45, and correlated color temperature is about 2600 [K] .Duv is about 1.

From the above, the main emission wavelength is 530 to 58.
When the correlated color temperature is used as an index for a fluorescent lamp having a wavelength of 0 [nm] and 600 to 650 [nm], about 3500 [K] is obtained at the boundary between a light-color image like a light bulb and a white-color image. is there.

Next, for reference, FIG. 22 shows the relationship between the chromaticity of 1 to v of claim 21 of the present invention and the range of the light color of the fluorescent lamp according to JIS.

In FIG. 22, 29 is white, 30 is warm white, 31
Is the chromaticity range of the bulb color fluorescent lamp. 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.

As an embodiment for giving a light color image equivalent to a bulb color to the light emission color of the high-efficiency new light source of the present invention, a phosphor having a light emission peak wavelength of 540 to 560 nm is used.
LaP ₂ O ₄ : LAP of Ce, Tb and emission peak wavelength of 600 to 6
As a 20 nm phosphor, (formula 2) YOX of Y ₂ O ₃ : Eu was used in a light flux ratio of LAP: YOX = 60: 40 to LAP:
YOX is changed up to 70:30.

In the case of LAP: YOX = 70: 30 in the luminous flux ratio, compared with the conventional three-wavelength band fluorescent lamp bulb color,
The efficiency can be improved by 10% while reducing the types of phosphors.

As another embodiment of the present invention, FIG. 27 shows a phosphor having an emission peak wavelength of 440 to 460 nm and a composition of (Chemical Formula 3) (Sr, Ba, Ca) ₁₀ (PO ₄ ) ₆ Cl ₂ : Eu. A and a phosphor having a composition of La as a phosphor having an emission peak wavelength of 540 to 560 nm.
P ₂ O ₄ : LAP of Ce, Tb and emission peak wavelength of 600 to 62
As a 0 nm phosphor, YOX having a composition of Y ₂ O ₃ : Eu is used:
5 shows a spectral distribution of a fluorescent lamp configured with a light flux ratio of 67:32.

The xy chromaticity value of the fluorescent lamp is (0.4315,
0.4334), the correlated color temperature is 3317 K, and the DUV is 12.3. By adding auxiliary light emission in addition to the main emission wavelength, an arbitrary light color can be produced in the chromaticity ranges of claims 21 and 22 of the present invention. This is one embodiment.

In realizing a high-efficiency new light source, similar effects can be obtained by realizing a light color equivalent to that of the fluorescent lamp of the present invention with a metal halide lamp other than the above-described embodiment using a fluorescent lamp. The first is the minimum, red, green, blue,
A metal halide lamp that has a high luminous brightness in scotopic vision and mesopic vision, or in a large field of view, while ensuring color reproducibility that allows classification of yellow, white, and black surface colors.

The second is to use at least the color light source mixed with the conventional high color temperature light source while ensuring the color reproducibility that allows the classification of the surface colors of red, green, blue, yellow, white and black. In this case, a metal halide lamp with a light white color with less discomfort in the light color.

The third is that the color light source can be used in combination with the conventional low color temperature light source while ensuring color reproducibility that allows the classification of the surface colors of red, green, blue, yellow, white, and black at a minimum. In this case, a metal halide lamp that is a highly efficient illumination light source that has less discomfort in the light color and the light color is equivalent to the light bulb color. Can be realized.

In the case of a metal halide lamp, the main emission wavelength range is 530 to 580 [nm] and 600 to 6 nm.
Metal halide (metal halide) with 50 [nm]
The present invention can be realized by adding a metal halide (metal halide) that emits light at 420 to 530 [nm] and a metal halide (metal halide) that emits light at 470 to 530 [nm]. In general metal halide lamps, In (blue light emission) -Tl (green light emission) -Na (yellow / red light emission)
Although many system-based lamps are used, the present invention can be realized by a combination of these enclosures in which the amount of In is increased to increase the blue emission component.

Further, the present invention can be realized by a combination of (Chemical Formula 17) NaI.AlCl ₃ or (Chemical Formula 18) CaI ₂ .AlCl ₃ with a metal halide of thallium (for example, metal iodide of thallium). Is also possible.

Another common metal halide lamp includes an Sc—Na— (Th) system. By enclosing a thallium metal halide (for example, thallium metal iodide), the present invention can be used. It is also possible to realize.

In addition, a Ce—Na—Cs— (Sm) -based material (for example, an iodide thereof) in which the amount of Sm is reduced to reduce the blue light-emitting component, or a metal halide of thallium (for example, The present invention can also be realized by a combination of a metal iodide with thallium.

As described above, the present invention firstly secures the color reproducibility that allows the classification of the red, green, blue, yellow, white, and black surface colors to be performed with respect to the highly efficient new light source. A light source with high luminous brightness in scotopic vision and mesopic vision, or in a large visual field.

Second, the color reproducibility that allows the classification of the surface colors of red, green, blue, yellow, white, and black is secured at the minimum, and at the same time, it is used in combination with the conventional high color temperature light source. In this case, the light source has a light color with little sense of incongruity and a white color.

Third, the color reproducibility that allows the classification of the surface colors of red, green, blue, yellow, white and black is secured at a minimum, and the color reproducibility is used in combination with the conventional low color temperature light source. In this case, the light source is a highly efficient illumination light source that has a light color that is less unnatural and the light color is equivalent to a bulb color. As an improvement.

The present invention has a high possibility of being put into practical use as an efficiency-oriented light source in a place where the fidelity of color appearance is not emphasized. For example, it is particularly promising as a light source for outdoor lighting, and can be used in outdoor lighting, road lighting, street lighting, vehicle lighting, tunnel lighting, plaza lighting, garage lighting, warehouse lighting, factory lighting, and the like.

Further, the light source of the present invention is applied to a place where the fidelity of color appearance is not emphasized and used at low illuminance, so that the light source can be used in a scotopic to mesopic visual environment. And the effects of the present invention can be effectively obtained.

The present invention provides a new high-efficiency light source in which the visible wavelength range is 420 to 530 [nm] (more specifically, 420 to 470 [nm], 470 to 530 [nm]), 530 to 530 [nm].
It controls the ratio of light emission at 580 [nm] and 600 to 650 [nm].

As a result, the following new effects can be satisfied.

First, while increasing the luminous efficiency in scotopic vision and mesopic vision or in a large visual field, at least the categorical red, green, blue, yellow, and white colors of the surface color of the object to be illuminated. It is an object of the present invention to realize a highly efficient illumination light source that secures high distinction.

Next, an illumination light source having a white feeling in light color is realized while securing color reproducibility capable of classifying the surface colors of red, green, blue, yellow, white and black at a minimum. It is to be.

Next, the third one is the minimum, red,
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 green, blue, yellow, white, and black surface colors.

It has been empirically reported that, even in a general illumination light source, a light source having a high correlated color temperature feels brighter even under the same illuminance environment. 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 light bulb color (3000K): EX-L, day white (5000K): EX-N, daylight color of a three-wavelength range fluorescent lamp.
(6700K): EX-D. Also, as another comparison object,
Common white fluorescent lamp using calcium halophosphate phosphor: FLW, high-efficiency 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 high-efficiency new light source: based on 2B (two-wavelength emission fluorescent lamp), but in order to prevent the lamp efficiency from falling below 10% (Chem. 3) (Sr, C
a, Ba) ₅ (PO ₄ ) ₃ Cl: Eu added to implement 2B + SCA
And calcium halophosphate phosphor (Chemical Formula 16) Ca ₅ (PO ₄ )
₃ (F, Cl): 2B + halo W which carried out the present invention by adding Sb, Mn,
(Formula 11) 2B + obtained by adding Sr ₄ Al ₁₄ O ₂₅ : Eu to practice the present invention
Each of the SAEs will be exemplified. Generally, the high-efficiency new light source (two-wavelength band fluorescent lamp) has a higher efficiency of 20% or more than the three-wavelength band fluorescent lamp. And maintain a high advantage. Here, separately, subjective brightness is considered.

That is, V ′ (λ) / V (λ) is used as a representative index for verifying the effect of improving the luminous sensation in scotopic vision and mesopic vision. V ₁₀ (λ) / V (λ) is used as a representative index for verifying the effect of improving the visual brightness in the visual field.

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

From these data, it can be seen that the effect of improving the various luminous efficiencies by adding a phosphor to the high-efficiency new light source is broadband like the white halophosphate calcium phosphor used in general illumination light sources. It can be seen that the phosphor that emits less light and emits light in a relatively narrow band is larger.
That is, the phosphor (Chem. 3) (Sr, Ca, Ba) ₁₀ (P) which shows a relatively narrow band emission having an emission peak at 420 to 470 [nm].
O ₄ ) ₆ Cl ₂ : Eu shows a sufficient improvement effect. In addition, 470-
The phosphor (Chem. 11) Sr ₄ Al ₁₄ O ₂₅ : Eu which emits light in a relatively narrow band having an emission peak at 530 [nm] shows a large improvement effect.

Although the data of FIGS. 28 and 29 are meaningful only in their relative relationships, the various types of data described above by adding light emission of 470 to 530 [nm] to the high efficiency new light source are mainly used. The effect of improving the luminous efficiency is felt in each lighting environment in which the bulb color: EX-L and daylight color: EX-D of the three-wavelength range fluorescent lamp are set to the same illuminance,
The improvement effect is more than the difference between the brightness feeling of EX-L and the brightness feeling of EX-D.

These effects according to the present invention can be achieved by low illumination of design, used in scotopic vision and mesopic vision, and it is not necessary to have a strict color appearance. It has a wide range of applications such as lighting, security lights, lingering lights, factory lighting in automated factories, and public lighting in places with little traffic.

At the same time, 420 to 53 in the present invention
By enhancing the spectral distribution in the wavelength range of 0 [nm], it is possible to maintain the high efficiency of the new fluorescent lamp, reduce the tint of light color, and provide a white appearance.

Further, in order to efficiently reduce the tint of the light color and enhance the whiteness, it is necessary to reduce the light intensity on the single wavelength side of the spectrum.
It is desirable to concentrate light emission in the emission wavelength range of 0 to 470 [nm].

On the contrary, there is a case where a light color corresponding to a light 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.

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, development of light color variations of light colors with less discomfort and high whiteness is achieved.
When used in combination with a low color temperature light source, it is possible to develop a light color variation of a light color with less discomfort and a light color equivalent to a bulb color.

[0215]

As is evident from the above description, the present invention provides a light-emitting bulb color when the high efficiency new light source of the present invention is used in combination with a conventional low color temperature light source. It has the advantage that the discomfort of appearance can be improved.

[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.

FIG. 2 is a diagram showing a comparison of various relative luminous sensitivities in which relative luminous efficiency is made relative to a peak height of 1;

FIG. 3 is a diagram showing a comparison of various relative luminous sensitivities in which relative luminous efficiency is relativized with a peak height of 1;

FIG. 4_{b, 10}(λ) and V_{b, 2}(λ) difference, V_M(λ) and V (λ)
Difference, V_Ten(λ) and V (λ) = V _Two(λ), V ′ (λ) and V
Diagram showing the difference of (λ)

FIG. 5 is a diagram showing basic spectral sensitivities of three kinds of cones of an eye (an S-cone, an M-cone, and an L-cone) and the basic spectral sensitivities of a rod, relative to each other, with a peak being 1;

FIG. 6 is a diagram showing a range on 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 for luminance on xy chromaticity coordinates.

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

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

FIG. 11 is a chromaticity value (x, y) = 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) and a straight line 23 (y <−
0.43x + 0.60) and the relationship between the color names of the light source colors

FIG. 12 is a light source as an embodiment in a 20W fluorescent lamp.
The figure which shows the spectral distribution of (lf)-(lj).

FIG. 13 shows a light source according to an embodiment of a 20W fluorescent lamp.
The figure which shows the spectral distribution of (lf)-(lj).

FIG. 14 is a light source as an embodiment in a 20W fluorescent lamp.
The figure which shows the spectral distribution of (lf)-(lj).

FIG. 15 shows a light source as an embodiment in a 20W fluorescent lamp.
The figure which shows the spectral distribution of (lf)-(lj).

FIG. 16 shows a light source as an embodiment in a 20W fluorescent lamp.
The figure which shows the spectral distribution of (lf)-(lj).

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

FIG. 18 shows a chromaticity value (x,
y) = a: (0.228,0.351), b: (0.358,0.551), c: (0.525,0.4
40), d: (0.453, 0.440), e: (0.285, 0.332) and the chromaticity range 25 defined by y <−0.43x + 0.60, etc., are shown on the xy chromaticity coordinates. Figure

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 respondents that the color is acceptable as a light bulb color.

FIG. 21 is a graph showing the range from l to v according to claim 21 of the present invention;
Diagram showing the relationship with 3

FIG. 22 is a diagram showing a range of light colors of a fluorescent lamp of JIS as a reference for comparison.

FIG. 23 is a diagram showing a spectral distribution of an embodiment of a fluorescent lamp when the luminous flux ratio of LAP: YOX is changed.

FIG. 24 is a diagram showing the spectral distribution of an embodiment of a fluorescent lamp when the luminous flux ratio of LAP: YOX is changed.

FIG. 25 is a diagram showing a spectral distribution of an embodiment of a fluorescent lamp when the luminous flux ratio of LAP: YOX is changed.

FIG. 26 is a diagram showing a spectral distribution of an embodiment of a 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 V10 (λ) / V (λ) and the various light sources.

[Explanation of symbols]

1. Spectral distribution when the present invention is implemented with a fluorescent lamp 2. Spectral distribution when a high efficiency new light source is implemented with a fluorescent lamp

Claims (7)

[Claims] 1. A fluorescent lamp for categorical color perception, wherein main light is emitted and a peak range of an emission wavelength is 530.
-580 [nm] and 600-650 [nm], and the correlated color temperature is 1700-∞ [K], Duv (distance f
rom perfect radiator locus on uv co-ordinates)
And chromaticity values (x,
y) is fx ² + gy ² + hxy + ix + jy + k = 0, f = 0.6179, g = 0.6179, h
= -0.7643, i = -0.2205, j = -0.1765, k = 0.0829 It is characterized by having an emission color in a range overlapping with the range of the quadratic curve, at least, the surface color of the illuminated object red, green, A fluorescent lamp capable of categorizing blue, yellow, and white colors. 2. A fluorescent lamp for categorical color perception, wherein the main light is emitted and the emission wavelength peak range is 530.
580 [nm] and 600 to 650 [nm], 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 = -0.2205,
From the range of the quadratic curve of j = -0.1765, k = 0.0829, the point l: (0.4775,0.4283), m: (0.4594,0.3971), n:
(0.4214,0.3887), 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: (0.4341,0.4233), v: (0.4
348, 0.4185), which is a range excluding the range (1 to v) connecting at least the surface color of the illuminated object,
A fluorescent lamp capable of categorizing green, blue, yellow, and white colors. 3. The main emission wavelength is 530 to 580 nm,
In a fluorescent lamp obtained from a phosphor having an emission peak wavelength at 600 to 650 nm, a luminous flux emitted from a phosphor having a peak wavelength at 530 to 580 nm;
The ratio G: R (%) of the luminous flux emitted from the phosphor having an emission peak wavelength at 650 nm is G = 70 to 59, and R = 3.
3. The fluorescent lamp according to claim 1, wherein the number is from 0 to 41. 4. A main emission wavelength of 530 to 580 nm,
In a fluorescent lamp obtained from a phosphor having an emission peak wavelength at 600 to 650 nm, the auxiliary emission wavelength is set to 420 to 5
Obtained from an existing phosphor having an emission peak at 30 nm,
420-530 nm (B + BG), 530-580 nm
(G), the ratio of luminous flux emitted from a phosphor having an emission peak at 600 to 650 nm (R) (B + BG): G: R (%)
4. The fluorescent lamp according to claim 1, wherein B + BG = 0 to 3, G = 59 to 71, and R = 41 to 26. 5. The emission wavelength peak ranges from 530 to 58.
The phosphor of 0 [nm] is a phosphor activated with terbium or terbium and cerium, and the phosphor of 600 to 650 [nm] is a phosphor activated with europium or manganese. The fluorescent lamp according to claim 1. 6. The emission wavelength peak ranges from 530 to 58.
0 [nm] and 600 to 650 [nm] phosphors are converted to (Ce, Gd, Tb)
The fluorescent lamp according to any one of claims 1 to 5, wherein the fluorescent lamp is realized by one phosphor composed of (Mg, Mn) B5O10 and (Ce, Gd) (Mg, Mn) B5O10. 7. 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.
A fluorescent lamp according to any one of claims 1 to 6.