JP3237501B2 - Lighting lamps and lighting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting lamp and a lighting apparatus for vividly designing a color environment.

[0002]

2. Description of the Related Art At present, as a method for quantitatively evaluating the color rendering of a light source, there is a "method for evaluating the fidelity of color appearance". This is a method for quantitatively evaluating how faithfully the target lamp reproduces the color compared to the reference light, and is currently specified in JIS Z 8726 "Method for evaluating the color rendering of light sources". It is represented by the numerical value of the average color rendering index Ra.
At present, discharge lamps are also being developed with the aim of improving the average color rendering index Ra and the brightness efficiency.

[0003]

On the other hand, in addition to the evaluation of the fidelity of the appearance of color, research on "a method of evaluating the preference of the appearance of color" has recently been conducted. In this method, the target lamp has a color shift when compared with the reference light.
This is a method for quantitatively evaluating whether there is a shift in an undesirable direction. This evaluation of the favorableness of color appearance is one of the important color rendering characteristics of a light source, but a standardized method has not yet been determined to date.

[0004] For this reason, at this research institute, Hashimoto et al. Used a lighting index based on a conspicuity index developed from the concept of conspicuous feeling of color objects such as fresh flowers and green leaves, among the evaluation methods for the preference of color appearance. Has been clarified based on many years of research results (eg, Hashimoto et al .: Visual
Clarity and Feeling of Contrast, Color Researchan
d Application, 19, 3, June, (1994), Hashimoto et al .: Method for evaluating color rendering properties of light source based on prominence, Journal of the Illuminating Engineering Institute of Japan, 79, 11, (1
995), JP-A-6-180248 (Japanese Patent Application No. 4-33)
No. 3919)).

However, since an evaluation method such as a conspicuous index has not been established, a method of an illumination lamp for making a color object such as green of a flower or a leaf of a tree stand out is not enough. Had not been considered.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a part or all of the wavelength region of illumination light from around 480 nm to around 510 nm, or the entire wavelength region of around 560 nm to around 600 nm. Alternatively, part or all of the spectral radiation intensity from each of the two wavelength ranges is reduced.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a part or all of the wavelength region of illumination light from around 480 nm to around 510 nm, or 560 nm.
An illumination lamp and an illumination device that reduce the spectral radiation intensity of the entire wavelength range from about nm to about 600 nm, or a part or all of the respective wavelength ranges.

First, the outline of the conspicuous index M will be described. The degree of conspicuousness of the color object illuminated under each lighting lamp is determined by the brightness (B) and the colorfulness (Mr−) of the nonlinear color perception model of Naya et al.
g, My-b) (for example, Naya et al., “Color Research and Application”)
n), 20, 3, (1995)) and the color gamut area of the four test colors. In particular, since the test color that greatly contributes to the conspicuousness is red, the area surrounded by the red, blue, and green test colors and the area surrounded by the red, yellow, and green test colors are based on the red test color. The sum of the areas was defined as the color gamut area of the four test colors. Based on the color gamut area of the four test colors, the conspicuous index M is given by equation (1).

G (S, 1000 (lx)) in the equation (1) indicates the color gamut area of the four test colors under the sample light source S and the illuminance of 1000 (lx), and G (D65, 1000 (lx)).
x)) is the reference light source D65 and the reference illuminance 1000 (l
The color gamut area of the four test colors under x) is shown.

M = [G (S, 1000 (lx) / G (D65,
1000 (lx))] ^1.6 x 100 (1).

That is, 4 under any illumination lamp light S
When the color gamut area of the color test color shows an area equivalent to the color gamut area under the standard light D65, that is, the standard light D6
When a conspicuous feeling equivalent to 5 lights was obtained, the conspicuous index M of the lamp was standardized as M = 100.

The higher the conspicuous index M is, the more conspicuous a color object such as fresh flowers or green leaves can be. Therefore, various lighting lamps from 380nm to 780nm
The change of the conspicuous index M was determined for 41 types of illumination lamps prepared by cutting the spectral radiation intensity in the visible wavelength range at every 10 nm. FIG. 1 shows an illumination lamp having a spectral emission intensity of 3000 K of blackbody radiation, which was prepared by cutting the spectral emission intensity in the visible wavelength range from 380 nm to 780 nm every 10 nm as described above.
Changes in the conspicuous index M are shown for 41 types of illumination lamps. The horizontal axis in FIG. 1 indicates the cut wavelength, and the vertical axis indicates the value of the conspicuous index M. As is clear from FIG. 1, it is understood that the value of the conspicuous index M is higher when wavelengths around 480 nm to around 510 nm and around 560 nm to around 600 nm are cut than when no wavelength is cut.

That is, as shown in FIG. 1, the present invention provides a wavelength range of about 480 nm to about 510 nm of illumination light and 560 nm.
Either wavelength range from around m to 600 nm,
Alternatively, an illumination lamp capable of highlighting a color object such as fresh flowers or green leaves of a tree by increasing the value of the conspicuous index M by reducing a part or all of the spectral radiation intensity from each of the two wavelength regions. And lighting equipment. Hereinafter, the effect of increasing the value of the conspicuous index M by reducing the spectral radiant intensity of at least a part of the above wavelength region and improving the conspicuousness of the color object will be referred to as an “eye-catching effect”.

(First Embodiment of Illumination Lamp)
As a first embodiment of the present invention, for a fluorescent lamp approximated to the standard light D65, 41 types of illumination lamps created by cutting the spectral radiant intensity in the visible wavelength range from 380 nm to 780 nm at every 10 nm. FIG. 2 shows the result of determining the change in the conspicuous index M.

The horizontal axis in FIG. 2 shows the cut wavelength, and the vertical axis shows the value of the conspicuous index M. As is clear from FIG.
It can be seen that the value of the conspicuous index M is higher when wavelengths around 470 nm to around 510 nm and around 550 nm to around 590 nm are cut than when no wavelength is cut.

Therefore, by using this means, not only an illumination lamp such as an incandescent light bulb having a spectral radiation intensity almost close to blackbody radiation, but also a fluorescent lamp makes a color object such as fresh flowers or green leaves of a tree stand out. It became clear that we could do that.

(Second Embodiment of Illumination Lamp) Next,
As a second embodiment of the present invention, a white fluorescent lamp (4178) is used.
FIG. 3 shows the result of calculating the change in the conspicuous index M for 41 types of illumination lamps prepared by cutting the spectral radiation intensity in the visible wavelength range from 380 nm to 780 nm for each 10 nm for K).

The horizontal axis in FIG. 3 shows the cut wavelength, and the vertical axis shows the value of the conspicuous index M. As is clear from FIG.
It can be seen that the value of the conspicuous index M is higher when wavelengths around 470 nm to 500 nm and near 550 nm to 590 nm are cut than when no wavelength is cut.

From the above, it has been clarified that the present invention is also useful for fluorescent lamps having different light colors.

(Third Embodiment of Illumination Lamp) Next,
As a third embodiment of the present invention, a three-wavelength daylight fluorescent lamp (6700K) with 41 types of illumination lamps prepared by cutting the spectral radiant intensity in the visible wavelength range from 380 nm to 780 nm every 10 nm is described. FIG. 4 shows the result of determining the change in the conspicuous index M.

The horizontal axis of FIG. 4 shows the cut wavelength, and the vertical axis shows the value of the conspicuous index M. As is clear from FIG.
It can be seen that the value of the conspicuous index M is higher when wavelengths around 460 nm to 520 nm and wavelengths around 550 nm to 590 nm are cut than when no wavelength is cut.

Accordingly, it has been clarified that the present invention is effective not only for the broadband light emitting fluorescent lamps shown in the embodiments of FIGS. 2 and 3, but also for a narrow band light emitting fluorescent lamp.

(Fourth Embodiment of Illumination Lamp) Next,
As a fourth embodiment of the present invention, a high-intensity discharge lamp (279
FIG. 5 shows the results of determining the change in the conspicuous index M for 41 types of illumination lamps prepared by cutting the spectral radiant intensity in the visible wavelength range from 380 nm to 780 nm for each 9 K) for each 10 nm.

The horizontal axis in FIG. 5 shows the cut wavelength, and the vertical axis shows the value of the conspicuous index M. As is clear from FIG.
It can be seen that the value of the conspicuous index M is higher when wavelengths around 480 nm to around 510 nm and around 560 nm to around 610 nm are cut than when no wavelength is cut.

As described above, the present invention can also be applied to an illumination lamp, such as an incandescent lamp, having a spectral emission intensity almost similar to that of a black body, a fluorescent lamp, or a high-intensity discharge lamp and having a different light emission principle from fresh flowers or leaves of a tree. It has become clear that color objects such as green can be made to stand out.

Reduction of the spectral radiation intensity of any one of the wavelength region of the illumination light from around 480 nm to around 510 nm and the wavelength region around from 560 nm to around 600 nm, or both wavelength regions. In the case of transmitted light, reflected light, and mixed light of transmitted light and reflected light, the method can be easily realized by controlling a multilayer interference film that is put into practical use, for example, in a halogen bulb. . In other words, the complex reflectance can be freely determined as a design target value from the optical film thickness and the number of thin films, and an arbitrary multilayer interference film can be manufactured (for example, in the “National Technical Report” (Na
national Technical Report, JUN, p.334-339, (1987)).

Incidentally, it goes without saying that a filter may be used in addition to the case where the multilayer interference film is formed on the transmission plate and the reflection plate.

Also, the chromaticity point of the light color of the illumination lamp is determined by CIE
1964 uv The chromaticity deviation from the chromaticity point of the blackbody locus on the chromaticity diagram is
By being present in a chromaticity range larger than -0.010 and smaller than +0.010, it is suitable as a fluorescent lamp for general illumination as a light color of natural illumination light.

As shown in FIG. 6, the chromaticity deviation is defined as the chromaticity point of the light color of the light source as S (u, v). Let P (u _o , v
_o ), it is defined by the distance SP between the chromaticity point S and the intersection P on the CIE 1960uv chromaticity diagram. However, the chromaticity deviation is positive (d> 0) when the chromaticity point S is on the upper left side (greenish light color side) of the black body locus, and is on the lower right side (reddish light color side). The chromaticity deviation was negative (d <0).

Further, with respect to the luminaire, a part or all of the wavelength region of the illumination light from around 480 nm to around 510 nm, or the whole of the wavelength region from around 560 nm to around 600 nm, or both, by the reflection plate or the transmission plate. The same effect as the illumination lamp can be obtained as long as it is a lighting fixture having a reflecting plate or a transmitting plate that reduces a part or all of the spectral radiation intensity from each of the wavelength regions.

(One Embodiment of Lighting Apparatus) FIG. 7 shows a lighting apparatus for general lighting as one embodiment of the present invention. FIG.
1 is a lighting fixture housing, 2 is a lighting lamp, 3 is a wavelength range from about 480 nm to about 510 nm of illumination light of the lighting lamp 2,
And a transmission plate made to reduce a part or all of the spectral radiation intensity from any one of the wavelength regions around 560 nm to 600 nm, or both wavelength regions, and 4 indicates transmitted light. .

According to the lighting device for general lighting of the above-described embodiment, it is possible to make a color object such as fresh flowers or green leaves of a tree stand out. In addition, as another form, a form using a reflection plate can be considered, but illustration is omitted.

In each of the above embodiments, the case where the predetermined wavelength region is cut has been described. However, the cut is not made completely, but by reducing the spectral radiation intensity in the wavelength region. It goes without saying that it is only necessary to have an effect.

Also, the wavelength range for reducing the spectral radiation intensity may be reduced at least partially to the extent that an eye-catching effect is produced, but the greater the degree of reduction, the greater the eye-catching effect. Also, from around 480 nm to 510 nm
Needless to say, if the wavelength region to be reduced is increased in the vicinity wavelength region or the wavelength region from around 560 nm to around 600 nm, the eye-catching effect increases as the wavelength region to be reduced increases. Also, if the entire wavelength region from around 480 nm to around 510 nm, and from around 560 nm to around 600 nm is reduced, the eye-catching effect is highest, but from around 480 nm to 510 nm.
Even if the entire wavelength region in the vicinity or the entire wavelength region from around 560 nm to around 600 nm is reduced, a good eye-catching effect can be obtained.

[0035]

As is clear from the above embodiment,
Advantageous Effects of Invention According to the present invention, it is possible to provide an illumination lamp and an illumination device that can make a color object such as fresh flowers or green leaves of a tree stand out.

[Brief description of the drawings]

FIG. 1 is a diagram showing a relationship between a cut wavelength and a conspicuous index M, which is a basic concept of the present invention.

FIG. 2 is a diagram showing a relationship between a cut wavelength and a conspicuous index M in the first embodiment of the illumination lamp of the present invention.

FIG. 3 is a diagram showing a relationship between a cut wavelength and a conspicuous index M in a second embodiment of the illumination lamp of the present invention.

FIG. 4 is a diagram showing a relationship between a cut wavelength and a conspicuous index M according to a third embodiment of the illumination lamp of the present invention.

FIG. 5 is a diagram showing a relationship between a cut wavelength and a conspicuous index M in a fourth embodiment of the illumination lamp of the present invention.

FIG. 6 is a diagram showing a chromaticity deviation SP.

FIG. 7 is a schematic diagram of a lighting device for general lighting according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 lighting fixture housing 2 lamp 3 transmission plate 4 transmitted light

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-190144 (JP, A) JP-A-3-33186 (JP, A) JP-A-7-105912 (JP, A) 36384 (JP, A) JP-A-1-187755 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01J 61/30-61/48

Claims (4)

(57) [Claims] 1. A part of the wavelength region near 510nm from 480nm near the lighting lamp, or a multilayer interference film reduces the spectral radiation intensity of all or, by using a filter, irradiation
Color gamut plane of four test colors under bright lamp S with illuminance of 1000 (lx)
The product is G (S, 1000 (lx)), and the standard light D65 has an illuminance of 1000 (lx).
The color gamut area of the four test colors G and D (D65,1000 (lx))
The standing index M is calculated as follows: M = [G (S, 1000 (lx)) / G (D65,1000 (lx))] ^1.6
An illumination lamp characterized by increasing the conspicuous index M when expressed as × 100 . Wherein the wavelength region near 510nm from 480nm near the lighting lamp, and a multilayer interference film to reduce the spectral radiation intensity of some or all of each of the two wavelength regions of the wavelength region of 600nm around from near 560 nm, Alternatively, an illumination lamp using a filter . 3. The chromaticity point of the light color of the illumination lamp is CIE1.
Claim 1 or 2 in serial mounting lighting lamp, characterized in that the chromaticity deviation from the blackbody locus in 964uv chromaticity diagram are present in smaller chromaticity range than +0.010 greater than -0.010. 4. A wavelength range of about 480 nm to about 510 nm of the illuminating light radiated from the luminaire ,
And to reduce a part or all of the spectral radiation intensity from each of the two wavelength ranges from about 560 nm to about 600 nm .
Reflector or transmission plate, or reflector and transmission plate
A lighting fixture characterized by using: