CN206036708U - Lighting appliance - Google Patents

Abstract

Provided is a lighting fixture capable of suppressing the occurrence of uneven irradiation and suppressing changes in the light distribution shape by a light diffusing portion. A lighting fixture comprising: a light source; and a translucent optical component comprising a first surface disposed on the light source side and a second surface for emitting light incident from the first surface, and for light distribution of light incident from the light source For control, the optical component is equipped with a total reflection part that totally reflects at least a part of the light incident from the light source, thereby controlling the optical path of the light, and the second surface is equipped with a total reflection part that makes the light incident into the total reflection part In the control light area where the light after total reflection is emitted, and the non-control light area as the area where the light that is not totally reflected is emitted, at least a part of the non-control light area is compared with at least a part of the control light area, so that The emitted light is largely diffused.

Description

lighting equipment

technical field

The utility model relates to a lighting appliance provided with a light-transmitting optical component.

Background technique

As a built-in lighting fixture, for example, a ceiling-embedded lighting fixture such as a downlight that is buried and arranged in a ceiling (mounted portion) to irradiate light downward is known. These lighting fixtures include, inside a fixture main body, a light source composed of LEDs and an optical lens for controlling light distribution of light emitted from the light source.

Conventionally, it has been proposed to use a Fresnel lens as an optical lens in order to make the optical lens used for light distribution control thinner and smaller (for example, Patent Document 1). For example, the Fresnel lens disclosed in Patent Document 1 has concentric grooves formed on the light-incident side surface, and has a zigzag cross-sectional shape. When such a Fresnel lens is used in a lighting fixture, slight ring-shaped irradiation unevenness occurs on the light irradiation surface due to the cross-sectional shape.

Then, in the lighting fixture disclosed in Patent Document 1, it is proposed to form a minute light diffusion portion (small recess) on the entire output surface of the Fresnel lens. According to this, the light emitted from the Fresnel lens can be appropriately diffused, so that the above-mentioned uneven irradiation can be suppressed.

(Prior art literature)

(patent documents)

Patent Document 1: Japanese Patent Laid-Open No. 2015-138761

However, in the lighting fixture disclosed in Patent Document 1, since the emitted light from the Fresnel lens is diffused by the light diffusion portion, a part of the emitted light is irradiated to an area other than the desired irradiation area. Accordingly, in the lighting fixture disclosed in Patent Document 1, there is a problem that the light distribution shape changes due to the light diffusion portion.

Utility model content

Then, this invention provides the lighting fixture which can suppress the generation|occurrence|production of uneven irradiation, and can suppress the change of the light distribution shape by a light-diffusion part.

In order to solve the above problems, one of the embodiments of the lighting fixture according to the present invention is provided with: a light source; Light distribution is controlled, the first surface is disposed on the light source side, the second surface emits light incident from the first surface, the optical component has a total reflection part, and the total reflection part, Totally reflecting at least a part of the light incident from the light source, thereby controlling the optical path of the light, the second surface has a control light area and a non-control light area, and the control light area is to make the light incident on The area where totally reflected light is emitted from the light of the total reflection part, and the non-control light area is an area where light that is not totally reflected is emitted is compared with at least a part of the control light area. At least a part of the non-controlling light area largely diffuses the emitted light.

In addition, the non-light control region may include a plurality of spherical recesses or protrusions.

Furthermore, the control light region may include a flat portion.

In addition, the optical component may be a Fresnel lens, and the second surface may have a plurality of concentric non-light control regions.

According to the present invention, it is possible to provide a lighting fixture capable of suppressing occurrence of uneven irradiation and suppressing a change in the light distribution shape by the light diffusing portion.

Description of drawings

FIG. 1 is a perspective view showing the appearance of a lighting fixture according to an embodiment.

Fig. 2 is an exploded perspective view of the lighting fixture according to the embodiment.

Fig. 3 is a cross-sectional view of the lighting fixture according to the embodiment.

4 is a cross-sectional view schematically showing an optical path from a light source to the inside of an optical component in the lighting fixture according to the embodiment.

5 is a cross-sectional view schematically showing an optical path inside an optical component in the lighting fixture according to the embodiment.

FIG. 6 is a plan view showing a second surface of the optical component according to the embodiment.

detailed description

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below shows a preferable specific example of this invention. Therefore, the numerical values, shapes, materials, components, arrangement positions and connection forms of the components shown in the following examples are examples, and do not limit the gist of the present invention. Therefore, among the components of the following examples, the components not described in the embodiment showing the highest concept of the present invention are described as arbitrary components.

In addition, each figure is a schematic figure, and is not necessarily a figure shown strictly. In addition, in each figure, the same code|symbol is attached|subjected to the substantially same structure, and the overlapping description is abbreviate|omitted or simplified.

(Example)

[1. Overall structure]

First, the overall structure of the lighting fixture according to the embodiment will be described using FIGS. 1 to 3 .

FIG. 1 is a perspective view showing the appearance of a lighting fixture 1 according to this embodiment.

Fig. 2 is an exploded perspective view of the lighting fixture 1 according to this embodiment.

Fig. 3 is a cross-sectional view of the lighting fixture 1 according to the embodiment.

In each figure, a direction parallel to the optical axis J is defined as a y-axis direction, and two directions perpendicular to the optical axis J and perpendicular to each other are defined as a z-axis direction and an x-axis direction. In this embodiment, the y-axis direction is the vertical direction.

The lighting fixture 1 shown in FIG. 1 to FIG. 3 is, for example, a built-in lighting fixture such as a downlight that is embedded and arranged in an installed portion such as a ceiling of a building to irradiate light downward (such as a floor and a wall). . In the present embodiment, in the lighting fixture 1 , the direction in which light is emitted from the lighting fixture 1 (light emitting direction) is referred to as the front, and the direction opposite to the light emitting direction is referred to as the rear. That is, when the ceiling surface on which the lighting fixture 1 is installed is used as a reference, the direction (below) on the floor side from the ceiling surface is forward, and the direction (upward) on the upper side from the ceiling surface is rearward. Also, the negative side in the y-axis direction is the front, and the positive side in the y-axis direction is the rear.

As shown in FIGS. 2 and 3 , the lighting fixture 1 includes a fixture main body 10 , a housing 20 , a light source 30 , a mounting member 32 , a connection member 36 , a reflection member 40 , an optical member 50 , and a cylindrical member 60 . Hereinafter, each component of the lighting fixture 1 will be described.

[1－1. Appliance main body]

The device main body 10 is a member in which the light source 30 is arranged. In the present embodiment, the instrument main body 10 is a mount on which the light source 30 is mounted. The instrument main body 10 also functions as a heat sink that scatters heat generated by the light source 30 . Therefore, it is preferable that the device main body 10 is made of a material with high thermal conductivity such as a metal material. The tool body 10 is, for example, made of aluminum die-casting. As shown in FIG. 3 , the device main body 10 includes a cover portion 11 , an attachment portion 12 , and a heat dissipation portion 13 .

The mounting portion 12 is a table-shaped portion for mounting the light source 30 . As shown in FIG. 3 , the light source 30 is disposed on the front side of the mounting portion 12 , and the heat dissipation portion 13 is disposed on the rear side of the mounting portion 12 . Accordingly, the heat generated in the light source 30 is efficiently transmitted to the heat dissipation portion 13 .

The cover portion 11 is a cylindrical portion that surrounds the optical axis J of the light source 30 and is provided on the edge of the attachment portion 12 . The emitted light of the lighting fixture 1 is emitted from the front side end portion of the cover portion 11 . As shown in FIG. 3 , on the inner surface of the cover portion 11 , a second locking portion 114 for locking the cylindrical member 60 is provided. In this embodiment, the second locking portion 114 is an annular groove formed on the inner surface of the cover portion 11 .

The heat dissipation portion 13 is a portion that scatters heat generated by the light source 30 and includes a plurality of blades. The heat dissipation portion 13 is formed on the rear side of the mounting portion 12 .

[1－2. Frame]

The frame body 20 is a member for attaching the appliance main body 10 to an attached portion such as a ceiling. In this embodiment, the frame body 20 is a substantially cylindrical member that surrounds the cover portion 11 of the instrument body 10 . As shown in FIGS. 2 and 3 , the frame body 20 has an attachment spring 25 on its outer peripheral surface. The attachment spring 25 is an elastic member for attaching the housing 20 ′ to a construction material that is an attached portion of the lighting fixture 1 . In this embodiment, three installation springs 25 are arranged on the outer peripheral surface of the frame body 20 .

In this embodiment, it is configured such that the direction in which the light emitted from the instrument main body 10 is emitted can be changed by changing the relative angle of the instrument main body 10 with respect to the fixed housing 20 . That is, the lighting fixture 1 according to this embodiment is a universal downlight.

The frame body 20 can be formed of a metal material such as aluminum, for example.

[1－3. Light source]

The light source 30 is a light emitting module and also a light source that emits predetermined light in a radial manner. In this embodiment, the light source 30 is a light emitting module with LEDs. The light source 30 is configured to emit, for example, white light. The light source 30 is made of a COB (Chip On Board) type LED, as shown in FIG. The LED304 is a sealing member containing a phosphor. Moreover, in this Example, the sealing member sealed all LED304 collectively, However, The structure of a sealing member is not limited to this. The sealing member may be formed in a plurality of lines along the arrangement direction of the LEDs 304 arranged in lines.

The light source 30 is attached to the attachment portion 12 of the instrument main body 10 . In the lighting fixture 1 , the direction of the optical axis J of the light source 30 is the vertical direction (the y-axis direction in each figure).

The base 302 is a mounting substrate on which a plurality of LEDs 304 are mounted, and is, for example, a ceramic substrate, a resin substrate, an insulating-coated metal substrate, or the like. Furthermore, the base 302 is, for example, a plate shape having a rectangular plane in a plan view, and the bottom surface (rear side) of the base 302 is attached to the attachment portion 12 of the instrument body 10 . Furthermore, a pair of electrode terminals (a positive electrode terminal and a negative electrode terminal) for externally receiving direct current for causing the LED 304 (light source 30 ) to emit light are formed on the base 302 .

[1－4. Mounting parts]

The attachment member 32 is a member for attaching the light source 30 to the attachment portion 12 of the fixture main body 10 . As shown in FIG. 2 , the mounting member 32 includes a restricting portion 322 and a claw portion 324 .

The restricting unit 322 restricts the position of the light source 30 in the direction perpendicular to the optical axis J (x-axis direction and y-axis direction). The restricting portion 322 has a rectangular frame shape with an opening in the center. The opening formed in the center of the restricting portion 322 has a shape corresponding to the light source 30 , and the light source 30 is disposed in the opening. The mounting member 32 is arranged on the side (front side) of the mounting portion 12 on which the light source 30 is disposed, and is fixed to the mounting portion 12 by a connecting member 36 and screws 38 shown in FIG. 2 . More specifically, a through hole 326 is formed in the restricting portion 322 of the mounting member 32, and the screw 38 is screwed into the screw hole formed in the mounting portion 12 through the through hole 326, so that the mounting member 32 is fixed to the mounting portion 12. . Accordingly, the mounting member 32 and the light source 30 disposed in the opening thereof are fixed to the mounting portion 12 .

The claw portion 324 is a claw-shaped portion for supporting the reflection member 40 , and locks the locking hole 440 of the reflection member 40 as shown in FIG. 3 . In this embodiment, the mounting member 32 includes two claw portions 324 . The claw portion 324 has a substantially L-shaped shape, and the inclined surface (protrusion) protruding in the direction away from the optical axis J at the end of the claw portion 324 is inserted into the locking hole 440 to lock the hole 440 It is locked by the claw portion 324 .

For example, the mounting member 32 can be formed using a resin material such as polybutylene terephthalate (PBT) or polycarbonate.

[1-5. Connection parts]

The connection member 36 is a member connected to wiring (not shown) that supplies current to the light source 30 . The lighting fixture 1 according to the present embodiment includes two connection members 36 as shown in FIG. 2 , one connection member 36 is connected to the wiring on the high potential side, and the other connection member 36 is connected to the wiring on the low potential side. Electrodes (not shown) for supplying current to the light source 30 are provided on the connection member 36 . The electrodes are connected to electrode terminals formed on the light source 30 .

Furthermore, the connection member 36 also has a function of restricting the position of the light source 30 . A through hole through which a screw 38 passes is formed in the connecting member 36 , and the connecting member 36 is fixed to the mounting portion 12 and the mounting member 32 by the screw 38 inserted into the through hole. At this time, as shown in FIG. 3 , the end portion of the connecting member 36 on the optical axis J side presses the light source 30 against the mounting portion 12 to restrict the position of the light source 30 in the optical axis J direction (y-axis direction).

For example, the frame body of the connecting member 36 can be formed using a resin material such as PBT or polycarbonate. Furthermore, the electrodes of the connection member 36 can be formed using a conductive member such as copper.

[1-6. Reflective parts]

The reflective member 40 is a member that controls light distribution of light from the light source 30 . In this embodiment, the reflection member 40 reflects the light from the light source 30 toward the optical member 50 . As shown in FIG. 2 , the reflection member 40 has a substantially cylindrical shape in which an opening through which the optical axis J passes is formed.

The reflective member 40, as shown in FIG. 3 , has an approximate inner diameter configured to gradually increase from the end on the light incident side (positive side in the y-axis direction) from the light source 30 to the end on the light emitting side. Cylindrical shape. Light from the light source 30 is reflected on the inner surface of the reflection member 40 .

As shown in FIG. 3 , on the outer surface side of the reflective member 40 , locking hole portions 440 that are locked to the claw portions 324 of the mounting member 32 are provided. The locking hole portion 440 is a hole provided in a member standing upright on the outer surface side of the reflection member 40 . The locking hole portion 440 is locked to the claw portion 324 , so that the reflective member 40 is locked to the mounting member 32 . Accordingly, the reflective member 40 is attached to the attachment portion 12 of the device main body 10 via the attachment member 32 .

As shown in FIG. 2 , three claws 410 are provided at the light-emitting end of the reflective member 40 . The claw portion 410 is a portion for locking the optical component 50 .

For example, the reflective member 40 can be formed of a hard white resin material such as PBT. Furthermore, the reflecting member 40 may be provided with a metal film such as aluminum on the inner surface.

[1－7. Optical components]

The optical member 50 is a translucent optical member that controls light distribution of light incident from the light source 30 . As shown in FIG. 3 , the optical component 50 includes a first surface 510 disposed on the light source 30 side, and a second surface 520 that emits light incident from the first surface 510 . The optical member 50 has a function of controlling the light distribution of the light incident from the reflective member 40 and emitting it. In this embodiment, the optical component 50 is a Fresnel lens. The optical member 50 collects light incident from the first surface 510 and emits light having a substantially circular cross section from the second surface 520 . In this embodiment, the second surface 520 of the optical component 50 has a light diffusion structure for suppressing uneven illumination. This light diffusion structure will be described later.

As shown in FIG. 2 , three recesses 530 are provided on the edge of the optical component 50 . In this embodiment, the concave portion 530 is a portion having a concave shape provided on the second surface 520 of the optical member 50 . The concave portion 530 of the optical member 50 is locked to the claw portion 410 of the reflective member 40 , so that the optical member 50 is locked to the reflective member 40 . Accordingly, the optical member 50 is attached to the attachment portion 12 of the instrument main body 10 via the reflective member 40 and the attachment member 32 . In addition, in this way, the optical member 50 is arranged at the light-emitting end of the reflective member 40, so that the light emitted from the reflective member 40 enters the optical member 50 efficiently.

The optical member 50 is formed of a translucent material, for example, the optical member 50 can be formed of a transparent resin material such as PMMA (acrylic) or polycarbonate, or a transparent material such as a glass material.

[1－8. Cylindrical parts]

The cylindrical member 60 is a cylindrical member disposed on the inner surface of the cover portion 11 as shown in FIG. 3 . The cylindrical member 60 has an entrance opening 610 through which light emitted from the optical member 50 enters, and an exit opening 620 through which light incident upon the entrance opening 610 exits. The cylindrical member 60 is disposed on the inner surface of the cover portion 11 of the instrument body 10 and on the second surface 520 side of the optical member 50 .

As shown in FIG. 3 , the cylindrical member 60 is arranged such that the injection opening 620 is located near the front end of the cover 11 . In addition, the length of the cylindrical member 60 in the optical axis J direction (y-axis direction) is approximately the length from the second surface 520 of the optical member 50 to the front end of the cover 11 . Accordingly, the cylindrical member 60 can cover the portion from the vicinity of the second surface 520 of the optical member 50 to the vicinity of the front end of the cover 11 among the inner surfaces of the cover 11 . Here, the inner surface (surface on the optical axis J side) of the cylindrical member 60 is a black glare suppression surface. Thereby, it is possible to suppress the glare of the portion from the vicinity of the second surface 520 of the optical member 50 to the vicinity of the front end of the cover 11 among the inner surfaces of the cover 11 .

The inner surface of the cylindrical member 60 is not particularly limited if it is a black glare suppression surface. A black glare-suppressing surface can be realized, for example, by performing a matting process on a surface painted in black. Furthermore, the black glare suppression surface can also be realized by embossing a surface painted in black or a surface made of black components. Further, in order to further suppress glare on the inner surface of the cylindrical member 60 , a stepped portion (partition plate) may be provided on the inner surface of the cylindrical member 60 .

As shown in FIGS. 2 and 3 , the cylindrical member 60 includes a second locked portion 660 on its outer surface. The second locked portion 660 is locked to the second locking portion 114 to hold the cylindrical member 60 inside the instrument main body 10 . In this embodiment, the second locked portion 660 is a plurality of protrusions, and the second locking portion 114 is an annular groove formed on the inner surface of the cover portion 11 . Since the cylindrical member 60 has the above-mentioned structure, it can be attached simply by being inserted into the cover part 11. FIG.

For example, the tubular member 60 can be formed using a resin material such as polycarbonate or PBT.

[2. Light diffusion structure of optical parts]

Next, the light diffusion structure of the second surface 520 of the optical member 50 according to this embodiment will be described with reference to FIGS. 4 to 6 .

4 is a cross-sectional view schematically showing an optical path from the light source 30 to the inside of the optical member 50 in the lighting fixture 1 according to the present embodiment. The thick solid line and the thick dashed line shown in FIG. 4 indicate the optical path of light emitted from the light source 30 . Also, in FIG. 4, only the left half of the optical component 50 is shown.

FIG. 5 is a cross-sectional view schematically showing the optical path inside the optical component 50 in the lighting fixture 1 according to the present embodiment. FIG. 5 is an enlarged view of the inside of the two-dot chain line frame in FIG. 4 .

FIG. 6 is a plan view showing the second surface 520 of the optical component 50 according to this embodiment.

As shown in FIG. 4 , the optical component 50 according to the present embodiment is a Fresnel lens and includes a refracting portion 502 that refracts light incident from the light source 30 to control the optical path of the light. Further, the optical component 50 includes a total reflection part 504 that controls the optical path of the light by total reflection of at least a part of the light incident from the light source 30 .

The refraction unit 502 refracts light similarly to the convex lens. In the present embodiment, the refraction unit 502 refracts and condenses light radially expanded from the light source 30 .

The total reflection portion 504 is a portion having a zigzag cross-sectional shape as shown in FIG. 4 , and concentric circular grooves are formed on the first surface 510 . As shown in FIG. 5 , in the total reflection portion 504 , the first surface 510 includes a plurality of incident surfaces 514 and a plurality of total reflection surfaces 516 .

As shown by the thick solid line in FIG. 5 , most of the light incident on the incident surface 514 from the light source 30 is refracted by the incident surface 514 and enters the total reflection surface 516 from the inside of the optical component 50 . Furthermore, the light incident on the total reflection surface 516 is totally reflected by the total reflection surface 516, whereby the optical path is controlled. In this embodiment, the light totally reflected by the total reflection surface 516 propagates in a direction substantially parallel to the optical axis J. As shown in FIG. In this manner, most of the light incident on the total reflection portion 504 is controlled by the optical member 50 to propagate in a direction substantially parallel to the optical axis J. As shown in FIG. Hereinafter, the light that is incident on the total reflection portion 504 as described above, is totally reflected by the total reflection surface 516 , and reaches the second surface 520 is referred to as control light. Furthermore, as shown in FIG. 5 , the region from which the control light is emitted in the second surface 520 is referred to as a control light region 521 . That is, the second surface 520 includes the control light region 521 from which the totally reflected light out of the light incident on the total reflection unit 504 is emitted.

On the other hand, as shown by the thick dotted line in FIG. 5 , part of the light incident from the light source 30 on the incident surface 514 reaches the second level without being incident on the total reflection surface 516 after being refracted by the incident surface 514. Surface 520. Hereinafter, the light emitted from the second surface 520 without being totally reflected by the total reflection surface 516 after entering the total reflection portion 504 in this way is referred to as non-control light. This uncontrolled light is generated for each concentric groove portion formed by the total reflection surface 516 and the incident surface 514 of the optical member 50, as shown in FIG. radiate out in a state of being. Accordingly, when the non-control light is emitted without being diffused by the second surface 520, concentric irradiation unevenness by the non-control light occurs around the irradiation point formed by the control light emitted from the lighting fixture 1. . Therefore, conventional lighting fixtures diffuse all emitted light to suppress the unevenness in irradiation. Furthermore, as shown in FIG. 5 , the region on the second surface 520 from which the control light is not emitted is referred to as a non-control light region 522 . That is, the second surface 520 includes the non-controlling light region 522 that emits light that is not totally reflected among the lights incident on the total reflection portion 504 .

The lighting fixture 1 according to the present embodiment has a structure in which at least a part of the non-controlled light area 522 diffuses emitted light more widely than at least a part of the controlled light area 521 . In the present embodiment, as shown in FIG. 5 , the non-controlling light region 522 includes a plurality of spherical concave portions 528 as light diffusing portions. According to this, the uncontrolled light is diffused, and therefore, concentric irradiation unevenness is suppressed.

On the other hand, the region other than the non-light control region 522 in the second surface 520 of the total reflection part 504 has a flat part 526 . That is, at least a part of the control light region 521 has a flat portion 526 that suppresses light diffusion. Therefore, in the optical component 50 according to this embodiment, as shown in FIG. The flat portion 526 is formed concentrically. Accordingly, at least a part of the control light that does not need to be diffused is emitted from the second surface 520 without substantially being diffused. Therefore, it is possible to suppress a change in the light distribution shape (a change in the ratio of light irradiated to a desired irradiation area among the total emitted light emitted from the lighting fixture 1 ) due to diffusion of the control light. In addition, since mirror finishing can be easily performed on the flat portion 526 , light diffusion in the flat portion can be reduced.

In the above-described embodiment, the recessed portion 528 is provided in the entire area of the non-control light area 522 . That is, as shown in FIG. 6 , the region where the concave portion 528 is formed coincides with the non-control light region 522 . Furthermore, the concave portion 528 may not be provided in the entire area of the non-control light area 522 . For example, it may be provided only in a region where the intensity of the non-control light is particularly strong among the non-control light regions 522 . Thereby, further, the change of the light distribution shape by a light-diffusion part can be suppressed.

In addition, in the above-mentioned embodiment, the structure in which the light is not substantially diffused in the area other than the non-stimulated light area 522 is used, but the light may be diffused in the area other than the non-strained light area 522 . At least a part of the non-control light region 522 may diffuse the emitted light more widely than at least a part of the control light region 521 . For example, instead of the flat portion 526 of the second surface 520 according to the present embodiment, a concave portion 528 having a larger curvature radius than the concave portion 528 may be used. Accordingly, in the area other than the non-light control area 522 on the second surface 520 of the total reflection portion 504 , the emitted light is diffused smaller than in the non-light control area 522 . According to this, since the control light is moderately diffused, it is possible to suppress the color unevenness of the control light that occurs when the combination of the blue LED 304 and the phosphor is used as the light source 30 .

In addition, in this embodiment, the spherical concave portion 528 is used as the light diffusion portion, but a spherical convex portion may also be used. By using a spherical concave or convex portion as the light diffusing portion, unevenness in illuminance can be suppressed without greatly reducing the central luminous intensity of the light emitted from the lighting fixture 1 . Furthermore, the light-diffusing portion composed of spherical concave or convex portions can easily control the degree of light-diffusing compared with a light-diffusing portion formed by embossing or the like, and can achieve high reproducibility. Furthermore, since processing can be easy about a spherical light-diffusion part, the cost required for processing can be reduced. And, when forming the shape of the light diffusion part by a mold, when a spherical shape is adopted as the shape of the light diffusion part, compared with the case of adopting another shape (for example, a shape such as embossing), it can Suppresses mold wear.

In addition, the structure of the light diffusion part is not limited to the spherical concave part or the convex part. For example, a concave portion or a convex portion having a shape other than a spherical shape may be used as the light diffusion portion. In addition, as the light diffusion part, a facet-like shape combining minute planes can also be used. In addition, a portion subjected to embossing, shot blasting, etc. on the second surface 520 may be used as a light diffusion portion, or a diffusion filter may be attached to the second surface 520 to be used as a light diffusion portion.

Furthermore, in the present embodiment, at least a part of the control light region 521 has the flat portion 526 that suppresses light diffusion, whereby at least a part of the control light is substantially not diffused. Therefore, the change of the light distribution shape by the light-diffusion part of the lighting fixture 1 can be suppressed. In addition, since the flat portion can be easily mirror-finished compared with the spherical portion and the like, light diffusion in the flat portion 526 can be easily reduced.

[3. Summary]

As described above, the lighting fixture 1 according to this embodiment includes: the light source 30; The second surface 520 that emits light and controls the light distribution of the light incident from the light source 30 . The optical component 50 includes a total reflection part 504 that controls the optical path of the light by total reflection of at least a part of the light incident from the light source 30 . The second surface 520 includes a control light region 521 that emits totally reflected light out of light incident on the total reflection unit 504 , and a non-control light region 522 that is a region that emits light that is not totally reflected. At least a part of the non-controlled light area 522 diffuses the emitted light more widely than at least a part of the controlled light area 521 .

According to this, at least a part of the non-controlling light is diffused, so that the occurrence of irradiation unevenness can be suppressed. Furthermore, since at least a part of the control light is diffused smaller than the non-control light, it is possible to suppress a change in the light distribution shape by the light diffusion part.

Furthermore, in the lighting fixture 1 according to the present embodiment, the non-controlling light region 522 may include a plurality of spherical recesses or protrusions.

According to this, unevenness in illuminance can be suppressed without greatly reducing the central luminosity of the light emitted from the lighting fixture 1 . In addition, the light-diffusing portion composed of spherical concave or convex portions can easily control the degree of light diffusion and achieve high reproducibility, compared with a light-diffusing portion formed by embossing or the like. Furthermore, since processing can be easy about a spherical light-diffusion part, the cost required for processing can be reduced. And when forming the shape of a light-diffusion part with a mold, when adopting a spherical shape, compared with the case of employing an embossed shape, abrasion of a mold can be suppressed.

Furthermore, in the lighting fixture 1 according to the present embodiment, the control light area 521 may include a flat portion.

According to this, at least a part of the control light is emitted from the flat portion 526, and thus is substantially not diffused. Therefore, the change of the light distribution shape by the light-diffusion part of the lighting fixture 1 can be suppressed. In addition, since the flat portion can be easily mirror-finished compared with the spherical portion or the like, light diffusion in the flat portion 526 can be easily reduced.

Furthermore, in the lighting fixture 1 according to the present embodiment, the optical member 50 may be a Fresnel lens, and the second surface 520 may have a plurality of concentric non-control light regions 522 .

(Modification etc.)

As mentioned above, although the lighting fixture 1 which concerns on this invention was demonstrated based on an Example, this invention is not limited to the said Example.

For example, in the above-described embodiment, the optical component 50 is a Fresnel lens, however, the optical component 50 is not limited thereto. For example, it may be a translucent optical member that controls light distribution by total reflection, such as a compound lens.

In addition, in the above-described embodiment, COB LEDs are used as the light source 30, but other light emitting elements may also be used. For example, SMD (Surface Mount Device) type LEDs can also be used. In addition, other solid-state light-emitting elements such as organic EL (Electro Luminescence) elements, or other light sources other than solid-state light-emitting elements may be used.

In addition, forms obtained by implementing various modifications conceived by those skilled in the art to the embodiments, and forms realized by arbitrarily combining components and functions of the respective embodiments within the range not departing from the gist of the present invention are also included in the present invention. In this utility model.

Claims (4)

1. A lighting fixture, characterized in that it has: light source; and The light-transmitting optical member has a first surface and a second surface, and controls light distribution of light incident from the light source, the first surface is disposed on the light source side, and the second surface causing light incident from the first surface to emerge, The optical component includes a total reflection part that totally reflects at least a part of the light incident from the light source to control the optical path of the light, The second surface includes a control light area and a non-control light area. Yes, the area where light that is not totally reflected exits, At least a part of the non-control light area diffuses the emitted light more widely than at least a part of the control light area. 2. The lighting fixture according to claim 1, wherein: The non-controlling light region includes a plurality of spherical recesses or protrusions. 3. The lighting fixture according to claim 1 or 2, characterized in that, The control light area includes a flat portion. 4. The lighting fixture according to claim 1 or 2, characterized in that, The optical component is a Fresnel lens, The second surface has a plurality of concentric circles of the non-light-controlling regions.