JP2010135146A - Luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a convenient luminaire capable of effectively using radiated light by freely controlling emission patterns of the light to be radiated from a light source to control the irradiation range, and capable of easily changing the irradiation range by only exchanging a light-transmitting panel. <P>SOLUTION: The light-transmitting panel having a specified irregular shape is arranged opposite to the light source, on a radiating side of the luminaire including a LED light source. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lighting fixture having an LED light source.

  In recent years, reduction of the emission of carbon dioxide, a greenhouse gas, has been demanded from the viewpoint of preventing global warming, and accordingly, lighting fixtures having LED light sources and fluorescent light sources effective for power saving are increasing. . Lighting fixtures such as downlights and spotlights, which are often used as partial lighting, often use incandescent bulbs and mini-krypton bulbs as light sources, but these light sources have low luminous efficiency, higher efficiency and lower power consumption. Are moving to LED light sources and fluorescent light sources. In particular, LED light sources that can reduce waste with a long life and that do not contain harmful substances contribute to environmental conservation are remarkably improved in luminous efficiency, and lighting fixtures using LED light sources are rapidly spreading.

Normally, downlights and spotlights are designed so that the beam angle is controlled by the shape of the reflector in order to effectively use the light emitted from the light source, and the desired light distribution characteristics can be obtained according to the purpose of use. A dedicated reflector is provided. For this reason, many kinds of downlights and spotlights are prepared by lighting equipment manufacturers.
Japanese Unexamined Patent Publication No. 2000-193809 (Patent Document 1) shows a downlight provided with a light distribution control panel for efficiently directing light from a light source in a specific direction. However, since the purpose is to control the traveling direction of light emitted from the light source, for example, when used in a passage such as a corridor, it is difficult to selectively and uniformly spread the irradiation distribution in the longitudinal direction of the lower surface of the corridor.

Japanese Patent Application Laid-Open No. 62-217501 (Patent Document 2) discloses a sheet that has been finely processed, but the light from the light source is divided in two directions, resulting in large spots in the illuminance distribution. There is a problem that will occur.
In Japanese Patent Laid-Open No. 2000-306403 (Patent Document 3), an LED having a so-called elliptical light distribution characteristic in which a light distribution directivity angle is set larger in the horizontal direction than in the vertical direction as a characteristic of the light source itself is mounted. A footlamp that can be effectively illuminated in the longitudinal direction of the surface is shown. However, the control of the light distribution is based on the arrangement of the light source, that is, the fixed elliptical light distribution characteristic of the LED, depending on the arrangement, or the arrangement of a plurality of LEDs mounted. It is not something to control. For this reason, for example, when a signboard or the like is an object to be illuminated, it is necessary to change the LED mounting method by changing the size of the signboard or the like, which is not convenient.

In addition, it is known that the irradiation light can be spread in the longitudinal direction by using a lenticular lens, but in the case of a lenticular lens, from the viewpoint of transferability at the time of lens production and mechanical strength of the uneven shape of the mold. It is technically difficult to make a lens with a large diffusion angle.
Further, light diffusion control is performed only in the longitudinal direction, and the irradiation range cannot be freely controlled.
The prior art related to the present invention has been described above. Until now, the light emission pattern of light emitted from the light source can be easily changed by the light transmissive panel, and can be freely controlled to effectively use the emitted light. It is not possible to provide lighting fixtures that can.
JP 2000-193809 A Japanese Patent Laid-Open No. 62-217501 JP 2000-306403 A

  That is, the object of the present invention is to solve the above-mentioned problems and to control the irradiation range by freely controlling the light emission pattern of the light emitted from the light source by the light-transmitting panel so as to effectively use the irradiated light. It is possible to provide a lighting fixture that has the convenience of being able to easily change the irradiation range simply by replacing the light transmissive panel.

As a result of intensive studies to solve the above problems, the present inventors arrange a light transmissive panel having a specific uneven shape on the irradiation side of a luminaire having an LED light source so as to face the light source. As a result, the inventors have found that the above object can be achieved, and have completed the present invention based on this finding.
That is, the present invention
(1) A luminaire having an LED light source, wherein a light transmissive panel having a specific uneven shape on at least one side is disposed on the irradiation side of the luminaire so as to face at least the light source, and the light transmission The ratio of the average wavelength (λa) X in the direction in which the average wavelength (λa) is maximum and the average wavelength (λa) Y in the direction in which the average wavelength (λa) is maximum is 1.5 to 100 A lighting apparatus characterized by being.
(2) The light fixture according to (1), wherein the light-transmitting panel has an average wavelength (λa) Y of the uneven surface of 1 to 100 μm.
(3) The light transmissive panel has a diffusion angle A in a direction in which a diffusion angle of transmitted diffused light is maximum when a light beam is incident perpendicularly to an uneven surface, and a diffusion angle B in a direction in which the light is transmitted The illuminating device according to (1) or (2), wherein the diffusion angle ratio A / B is 1.5 to 475.
(4) A method of using a lighting fixture having the LED light source according to any one of (1) to (3), wherein a light transmissive panel constituting the lighting fixture having the LED light source is detachable, It is related with the usage method of the lighting fixture which has an LED light source characterized by changing irradiation range by replacing this light transmissive panel.

  According to the present invention, since the light emission pattern of light emitted from the light source can be controlled, an LED light source capable of freely controlling the irradiation range in the X direction and the Y direction and effectively utilizing the irradiated light. A lighting fixture can be provided. Furthermore, in order to change the irradiation range of the luminaire once installed, it was necessary to replace the luminaire main body and reattach it. According to the present invention, the irradiation range can be changed only by replacing the light transmissive panel. It is possible to provide a lighting apparatus having convenience that can be easily changed.

The present invention will be specifically described below.
The lighting fixture of this invention expresses a function by combining the light transmissive panel which has a specific uneven | corrugated shape on the irradiation side of the lighting fixture which has a LED light source. The light source may be a fluorescent light, an incandescent light bulb, or a mini-krypton sphere, but it is suitable because the light distribution characteristics can be easily controlled by combining it with an LED light source having higher directivity and higher luminance.
Examples of the lighting fixture having an LED light source that can be used in the present invention include a dowlight, a spotlight, a ceiling light, a light-up lighting fixture, and a line lighting fixture.

  For example, in the case of a downlight, a beam having a 1/2 beam angle of about 9 ° to 105 ° can be used. Here, the 1/2 beam angle (hereinafter referred to as the beam angle) refers to an angle that is twice the angle formed by the maximum luminous intensity of the light emitted from the luminaire and the luminous intensity that is 1/2 the axial luminous intensity. Normally, the beam angle of the downlight is a wide-angle type of 80 ° or more for general lighting applications such as living rooms, a medium-angle type of 80 ° or less for partial lighting applications such as corridor or wall illumination, and a narrow beam angle. The angle type is often used, and as the wide angle type downlight, LEDD-66001W-LS1 (beam angle 95 °), LEDD-44001W-LS1 (beam angle 90 °) manufactured by Toshiba Lighting & Technology Co., Ltd., manufactured by Matsushita Electric Works, Ltd. NNN21912 (beam angle 80 °), NNN21902 (beam angle 80 °), and the like. As the medium angle type downlight, LEDD-66003W-LS1 (beam angle 45 °) manufactured by Toshiba Lighting & Technology Co., Ltd., LEDD-44003W-LS1 (beam angle 50 °), NNN21910 (beam angle 40 °) manufactured by Matsushita Electric Works, Ltd., NNN21900 (beam angle 35 °) and the like. Examples of the narrow-angle type downlight include NNN21637 (beam angle 15 °) and NNN21638 (beam angle 15 °) manufactured by Matsushita Electric Works, Ltd.

  Examples of the spotlight include LEDS 80000W-LS and LEDS-80002L-LS manufactured by Toshiba Lighting & Technology Corporation. Examples of the ceiling light include LEDH8002W-LS, LEDH8002L-LS, and LEDS-31901WS-LS1 manufactured by Toshiba Lighting & Technology Corporation. Examples of LED light-up lighting fixtures used for lighting up bridges and building walls, signboard lighting, etc. include NNY24250 and NNY24251 manufactured by Matsushita Electric Works, Ltd. Examples of the line lighting fixture include LEDL-03201W-LS1 and LET-01001N-YW1 manufactured by Toshiba Lighting & Technology Corporation.

Each of these lighting fixtures has a predetermined light distribution characteristic, and a lighting fixture having a desired light distribution characteristic according to the place of use is selected. For example, in the case of a downlight, the irradiation angle is basically isotropic. Therefore, when used in a passage such as a corridor, the wide-angle type increases the rate of illumination of the wall surface, which is not preferable from the viewpoint of effective use of irradiation light. In addition, the illuminance on the floor directly under the luminaire increases with the medium-angle type and narrow-angle type, but the irradiation range is narrowed in a spot-like manner. There is a problem.
If the downlight in which the light transmissive panel of the present invention is arranged is used for a passage such as a corridor, light can be selectively distributed in the longitudinal direction, so that irradiation light can be effectively used.

Furthermore, the installation interval of the lighting fixtures can be widened, and the number of fixture lamps can be reduced, which is preferable from the viewpoint of power saving.
Moreover, since the desired range can be illuminated with high efficiency by using the light-up illumination in which the light transmissive panel of the present invention is arranged, it is possible to effectively use the irradiation light. Furthermore, normally, when the shape and size of the signboard to be lit changes, it is necessary to replace the luminaire body. However, according to the luminaire of the present invention, the irradiation range can be easily changed only by replacing the light transmissive panel. It has the convenience of being able to change.

Next, a light transmissive panel having specific random uneven shapes used in the present invention will be described.
The concavo-convex shape of the light-transmitting panel used in the present invention is the ratio X / of the average wavelength (λa) X in the direction in which the average wavelength (λa) is maximum and the average wavelength (λa) Y in the direction in which the average wavelength is minimum. It is preferable that Y is 1.5-100, More preferably, it is 1.5-50, More preferably, it is 1.5-30. When the average wavelength (λa) ratio X / Y is smaller than 1.5, it becomes close to isotropic diffusion. For example, when used in a passage such as a corridor, the effect of spreading the irradiation light in the longitudinal direction is small, and the irradiation light is used effectively. Can not do. By setting the average wavelength (λa) ratio X / Y to 1.5 or more, the irradiation light can be selectively spread in the longitudinal direction, and the irradiation light can be effectively used. Even if the average wavelength (λa) ratio X / Y is greater than 100, there is substantially no difference in the spread of the illuminance angle, and there is no need to increase it.

Moreover, it is preferable that the average wavelength ((lambda) a) Y which shows the minimum is 1-100 micrometers or less, More preferably, it is 1-70 micrometers or less, More preferably, it is 1-50 micrometers or less. The resolution of the human eye is about 50 seconds in terms of viewing angle, and since the luminaire is usually 1 m or more away from the position of the human eye, the average wavelength (λa) Y can be set to 100 μm or less so that the uneven shape can be obtained. The application becomes difficult to understand, and light with a soft feeling like a milky white frosted plate can be obtained. When the average wavelength (λa) Y is smaller than 1 μm, the light emission pattern cannot be stably controlled.
The average wavelength (λa) here is a value calculated according to the following formula using a high-precision fine shape measuring instrument Surfcoder ET4000 manufactured by Kosaka Laboratory Ltd.
λa = 2π (Ra / Δa)

In the above formula, Ra is an arithmetic mean roughness, and was measured according to JIS B0601 using a high precision fine shape measuring instrument Surfcorder ET4000 manufactured by Kosaka Laboratory Ltd.
In addition, Δa is an average gradient, and was measured according to ASME B46.1: 1995 using a high-accuracy fine shape measuring device Surfcoder ET4000 manufactured by Kosaka Laboratory Ltd.
Note that the average wavelength (λa) X and the average wavelength (λa) Y are three-dimensionally measured using a high-accuracy fine shape measuring instrument Surfcorder ET4000 manufactured by Kosaka Laboratory Ltd., and the average wavelength (λa) is maximum. The direction indicating the minimum and the direction indicating the minimum can be confirmed. The measurement was performed at 20 arbitrary positions in each direction, and the average values were defined as average wavelength (λa) X and average wavelength (λa) Y.

The light transmissive panel used in the present invention preferably has anisotropic diffusibility. The anisotropic diffusibility means that the transmitted light becomes elliptical when a parallel light beam is incident on the concavo-convex shape surface of the light transmissive panel. Specifically, the diffusion angle ratio A between the diffusion angle A in the direction in which the diffusion angle of the transmitted diffused light is the maximum and the diffusion angle B in the direction in which it is the minimum when parallel rays are incident on the concavo-convex shape surface perpendicularly. / B is in the range of 1.5 to 475, preferably in the range of 1.5 to 200.
When the diffusion angle ratio A / B is smaller than 1.5, it becomes close to isotropic diffusion. For example, when a downlight is used in a passage such as a corridor, the effect of spreading the irradiation light in the longitudinal direction is small, and the irradiation light is used effectively. Can not do. By setting the diffusion angle ratio A / B to be 1.5 or more, the irradiation light can be selectively spread in the longitudinal direction, and the irradiation light can be effectively used. Further, even if the diffusion angle ratio A / B is larger than 475, there is no great difference in the spread of the illuminance angle, and there is no need to increase it further. The diffusion angle ratio A / B is determined by controlling the aforementioned average wavelength (λa) ratio X / Y. The diffusion angle A can be arbitrarily set in the range of 15 ° to 95 °, and the diffusion angle B can be arbitrarily set in the range of 0.2 ° to 60 °.

As a method for forming a specific uneven shape on the light-transmitting panel used in the present invention, an injection molding method using a mold having an uneven shape, a transfer roll (master type) having an uneven shape, a base film, and UV Examples thereof include a transfer method in which irregularities are continuously formed on a film by roll-to-roll using a curable resin.
As a method for producing a mold or a transfer roll having a specific uneven shape, a method by interference exposure is preferable. Concavity and convexity formation by interference exposure means that irregular speckles caused by coherent light diffused at each point on the surface where light is applied to the diffuser interfere with each other in an irregular phase relationship. It is a method of forming irregularities by exposure and development.

  The uneven shape obtained by the interference exposure has a fine three-dimensional structure, and the specific uneven shape required for the present invention can be formed by controlling the speckle pattern. This fine three-dimensional structure is composed of a plurality of uneven structures. The height and pitch of the concavo-convex shape is irregular and has a pseudo-random shape.

  Specifically, it can be formed as follows. First, a submaster mold in which a speckle pattern is formed in advance by interference exposure is manufactured, a metal is deposited on the submaster mold by a method such as electroforming, and the speckle pattern is transferred to the metal to manufacture a master mold. The speckle pattern is transferred onto the surface of the light-transmitting resin layer by forming the light-transmitting resin layer with ultraviolet rays using the master mold. A detailed manufacturing method of this sub-master type is disclosed in Japanese Patent No. 3341519. All this content is included here.

The average wavelength (λa) X and the average wavelength (λa) Y can be controlled by adjusting the size, shape and direction of the speckle pattern. In general, the average wavelength (λa) depends on the average size and shape of the speckle. If the speckle is small, the average wavelength (λa) is small. If the speckle is oval, the average wavelength (λa) ratio X / Y increases.
Thus, the speckle pattern can be determined according to the desired directivity angle and diffusion angle. A detailed manufacturing method of this speckle pattern is disclosed in Japanese Patent No. 3390954. All this content is included here. The diffusion angle may be controlled by changing the pitch, height, and aspect ratio of the concavo-convex structure, or may be controlled by changing the refractive index of the light-transmitting resin layer to be cured with ultraviolet rays.

The diffusion angle refers to an angle (FWHM: Full Width Half Maximum) that is twice the angle (half-value angle) that attenuates to half the peak luminance when parallel light such as a laser is incident on the uneven surface. This diffusion angle can be obtained, for example, by measuring a light emission distribution of light incident from a normal color angle of 0 ° with a variable angle color difference meter manufactured by Nippon Denshoku Industries Co., Ltd.
The light transmissive panel used in the present invention preferably has a total light transmittance of 80% or more as defined in JIS K7361-1 when entering from a specific uneven surface. By setting the total light transmittance of the light transmissive panel to 80% or more, the light emitted from the LED light source can be used effectively, which is preferable from the viewpoint of power saving. The thickness of the light transmissive panel is preferably 0.1 mm to 5 mm from the viewpoints of handleability and cost.

The light-transmitting panel used in the present invention can be produced by preparing a film having a specific uneven shape and then bonding it to a support made of a light-transmitting material such as polymethyl methacrylate, polycarbonate, glass, etc. by an adhesive or thermal transfer. I do not care. The support may be any translucent material having a total light transmittance of 80% or more as defined in JIS K7361-1, such as polyethylene terephthalate, polycarbonate, polymethyl methacrylate, and glass.
The light-transmitting panel used in the present invention may have specific uneven shapes formed on both front and back surfaces.
In addition, the light transmissive panel used in the present invention preferably has a haze value defined in JIS K7136 of 30% or more, more preferably 50% or more, and still more preferably 80% or more. Since the LED light source has high directivity and high luminance, when the LED light source is viewed directly, if the haze value is less than 30%, it is uncomfortable because it feels strong glare. By setting the haze value to 30% or more, the dazzling feeling can be reduced, and illumination that is gentle to the eyes can be obtained.
The light-transmitting panel used in the present invention is preferably provided with a surface having a specific uneven shape on the light source side.

The light transmissive panel used in the present invention preferably has an angle changing prism shape on a surface opposite to a surface having a specific uneven shape. By having the prism shape for variable angle, the traveling direction of the irradiated light can be changed, and the desired irradiation direction can be illuminated effectively. For example, it is effective to illuminate a painting on the wall surface with a downlight attached to the ceiling. Moreover, since it can illuminate the direction right below a lighting fixture when it attaches to an inclined ceiling like a staircase, when descent | falling a staircase, it can reduce the glare by a light source directly entering into eyes.
The light transmissive panel used in the present invention preferably has a surface coated with an antireflection film. Since the total light transmittance can be improved by coating the antireflection film, it leads to further effective utilization of irradiation light.

According to the lighting apparatus of the present invention, the irradiation range can be controlled by freely controlling the diffusion angle of the irradiation light, and the irradiation light can be effectively used. In the irradiation light control using a conventionally known lenticular lens, The light emission pattern is controlled only in the longitudinal direction, and the light emission pattern cannot be freely controlled in both directions as in the present invention. In addition, from the relationship between the curvature and pitch of the cylindrical lens, it is difficult to obtain a light having a large diffusion angle and a soft feeling like a milky white frosted plate like the lighting fixture of the present invention, turn into. That is, it is difficult to provide a luminaire having functions such as effective use of irradiation light and light with a feeling of relaxation like the luminaire of the present invention.

Next, examples carried out to clarify the effects of the present invention will be described, but the present invention is not limited to these examples.
[Downlight]
An LED downlight (LEDD-66003W-LS1) manufactured by Toshiba Lighting & Technology Corp. was used.
[Light transmissive panel]
A master mold having various average wavelengths (λa) X and average wavelengths (λa) Y was manufactured by controlling the speckle pattern. Next, a light transmissive panel having a specific uneven shape was produced by a transfer method using a polyethylene terephthalate base (thickness: 188 μm) and a UV curable resin.
From the surface having the uneven shape of the produced panel, parallel rays were made incident, and the diffusion angles A and B were measured with a variable angle color difference meter (manufactured by Nippon Denshoku Industries Co., Ltd.). These results are summarized in Table 1. The sample name of the light transmissive panel was expressed according to Table 1.

[Various measurement methods]
(1) Measurement of ½ illuminance angle Using an illuminometer (manufactured by Hioki Electric Co., Ltd., Lux HiTester 3423, JIS C1609-1993 general type AA class), a line connecting the lighting fixture and the instrument directly below, An angle that is twice the angle formed by the line that connects the instrument and a point that has a horizontal illuminance that is ½ of the illuminance directly below the instrument. Specifically, the illuminance of 100 cm directly below the lighting fixture is measured, and the point that becomes the horizontal illuminance that is ½ of the illuminance directly below the fixture is determined. In addition, the measurement of a 1/2 illumination angle measured the illumination angle of the direction (width direction) in which an illumination angle shows the maximum, and the direction (depth direction) substantially orthogonal to it, respectively.
(2) Measurement of illuminance distribution Using an illuminometer (manufactured by Hioki Electric Co., Ltd., Lux Hitester 3423, JIS C1609-1993 general form AA class), the horizontal illuminance at 200 cm below the lighting fixture is measured. The measurement interval was 50 cm in each of the width direction and the depth direction.

[Example 1]
Replace the bottom cover (frosted acrylic plate) of LED downlight (LEDD-66003W-LS1) manufactured by Toshiba Lighting & Technology Co., Ltd. with a light transmissive panel (panel a in Table 1). The panel was mounted so that the diffusion angle was the maximum in the width direction. In addition, the uneven | corrugated shaped surface was made into the LED light source side about the arrangement direction of a light transmissive panel. Then, the measurement of the 1/2 illumination angle and the illumination distribution of the width direction and the depth direction were performed. The results of the ½ illuminance angle are shown in Table 2, and the results of the illuminance distribution are shown in FIG. The ½ illuminance angle in the width direction was 59 ° and the ½ illuminance angle in the depth direction was 32 °, and the irradiation light could be selectively spread in the width direction. When this was used for a corridor with a width of 90 cm, the illumination range was extended in the longitudinal direction, and there was little illuminance unevenness on the floor surface, confirming the effectiveness. The haze value was 89%.

[Example 2]
The same procedure as in Example 1 was performed except that the lower surface cover (frosted acrylic plate) was changed to a light transmissive panel (panel b in Table 1). The results of the ½ illuminance angle are shown in Table 2, and the results of the illuminance distribution are shown in FIG. The illuminance angle in the width direction was 64 ° and the illuminance angle in the depth direction was 33 °, and the irradiation light could be selectively spread in the width direction.

[Example 3]
The same procedure as in Example 1 was performed except that the lower surface cover (frosted acrylic plate) was changed to a light transmissive panel (panel c in Table 1). The results of the ½ illuminance angle are shown in Table 2, and the results of the illuminance distribution are shown in FIG. The illuminance angle in the width direction was 65 ° and the illuminance angle in the depth direction was 42 °, and the irradiation light could be selectively spread in the width direction and the depth direction, respectively.

[Comparative Example 1]
The 1/2 illumination angle and illumination distribution were measured using LED downlight (LEDD-6603W-LS1, frosted PMMA plate) manufactured by Toshiba Lighting & Technology Corporation. The results of the ½ illuminance angle are shown in Table 2, and the results of the illuminance distribution are shown in FIG. In both the width direction and the depth direction, the ½ illuminance angle was 35 °, and there was no effect of spreading the irradiation light in the width direction. When this was used for a corridor with a width of 90 cm, the illuminance was high only in a narrow area directly below the downlight, and the illuminance unevenness on the floor surface was large.

[Comparative Example 2]
The same procedure as in Example 1 was performed except that the lower surface cover (frosted acrylic plate) was changed to a lenticular lens (LL0.7) manufactured by Nippon Special Optical Resin Co., Ltd. The results of the ½ illuminance angle are shown in Table 2, and the results of the illuminance distribution are shown in FIG. The ½ illuminance angle in the width direction was 47 ° and the ½ illuminance angle in the depth direction was 32 °, and the effect of selectively spreading the irradiation light in the width direction was small. When this was used for a corridor with a width of 90 cm, the illuminance unevenness on the floor surface was relatively large.

[Comparative Example 3]
The same procedure as in Example 1 was performed except that the lower surface cover (frosted acrylic plate) was changed to a spread lens (YK40415) manufactured by Matsushita Electric Works, Ltd. Table 2 shows the results of the ½ illuminance angle, and FIG. 6 shows the results of the illuminance distribution. The 1/2 illuminance angle in the width direction was 46 ° and the ½ illuminance angle in the depth direction was 31 °, and the effect of selectively spreading the irradiation light in the width direction was small. When this was used for a corridor with a width of 90 cm, the illuminance unevenness on the floor surface was relatively large. Moreover, the glare of the light source remained and it was dazzling and uncomfortable.

  Since the lighting fixture of the present invention has a feature that the irradiation range can be freely controlled, it can be used in the lighting field where effective use of irradiation light and power saving are required.

2 is an illuminance distribution diagram of Example 1. FIG. It is an illuminance distribution diagram of Example 2. It is an illumination distribution map of Example 3. 6 is an illuminance distribution diagram of Comparative Example 1. FIG. 10 is an illuminance distribution diagram of Comparative Example 2. FIG. It is an illuminance distribution diagram of comparative example 3. It is the schematic of the downlight in connection with embodiment of this invention.

Explanation of symbols

1: Light transmissive panel of the present invention 2: LED light source

Claims (4)

A light fixture having an LED light source, wherein a light transmissive panel having a specific concavo-convex shape on at least one side is arranged on the irradiation side of the luminaire so as to face the light source, and the ruggedness of the light transmissive panel The shape is characterized in that the ratio X / Y of the average wavelength (λa) X in the direction in which the average wavelength (λa) shows the maximum and the average wavelength (λa) Y in the direction in which the minimum shows the minimum is 1.5 to 100. Lighting equipment. 2. The lighting apparatus according to claim 1, wherein the light transmissive panel has an average wavelength (λa) Y of 1 to 100 μm in a direction indicating the minimum of the uneven surface. The light transmissive panel has a diffusion angle ratio between a diffusion angle A in a direction in which a diffusion angle of transmitted diffused light is maximum and a diffusion angle B in a direction in which the diffusion angle B is minimum when a light beam is incident perpendicularly to an uneven surface. A / B is 1.5-475, The lighting fixture of Claim 1 or 2 characterized by the above-mentioned. It is a usage method of the lighting fixture which has the LED light source in any one of Claims 1-3, Comprising: The light transmissive panel which comprises the lighting fixture which has the said LED light source is detachable, Comprising: This light transmissive panel The use method of the lighting fixture which has LED light source characterized by changing irradiation range by replacing | exchanging.