JP2021136125A - Lighting fixture - Google Patents

Abstract

To provide a lighting fixture capable of emitting light that gradually changes between first color light and second color light, with a simple structure.SOLUTION: A lighting fixture 1 includes: a light source 30; a columnar or tabular light guide body 10 which has an incident surface 11a where light emitted by the light source 30 enters and an emission surface 11b where the light which has entered from the incident surface 11a emits, and in which a plurality of light extraction structures 12 is formed for emitting the light from the light emission surface 11b; and a cylindrical reflector 20 arranged between the light guide body 10 and the light source 30, and for guiding the light emitted by the light source 30 to the incident surface 11a. Also, in the incident surface 11a, first color light which is the light emitted by the light source 30 and which has entered the incident surface 11a without going through the reflector 20, and second color light which is the light emitted by the light source 30, which has entered the incident surface 11a via the reflector 20, and which is different from the first color light enter. Then, the emission surface 11b emits the first color light from a first region R1, and emits the second color light from a second region R2 different from the first region R1.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to luminaires.

Patent Document 1 describes a light source that emits light, an interference filter that changes the color of the light emitted by the light source and emits it, and a translucent tubular body that emits light emitted from the interference filter by providing a prism surface on the outer surface. A lighting device including the above is disclosed.

Jikkai Sho 63-14602

In the lighting fixture as the above-mentioned conventional lighting device, the light emitted from the light source passes through the interference filter and is incident on the light guide body formed into a translucent tubular body. Since the interference filter emits light of a uniform color, the light guide body emits light of a uniform color. However, when it is desired to emit light of a plurality of colors from the light guide, the structure of the luminaire may be complicated.

Therefore, an object of the present disclosure is to provide a lighting fixture capable of emitting light that gradually changes between the light of the first color and the light of the second color with a simple structure.

In order to achieve the above object, the lighting fixture according to one aspect of the present disclosure includes a light source, an incident surface on which the light emitted by the light source is incident, and an emitting surface on which the light incident from the incident surface is emitted. A columnar or plate-shaped light guide body on which a plurality of light extraction structures for emitting light from the light emitting surface are formed, and the light emitted by the light source are arranged between the light guide body and the light source. A tubular reflector that guides the incident surface is provided, and the incident surface includes light of a first color that is light emitted by the light source that is incident on the incident surface without passing through the reflector, and the reflector. Light emitted by the light source incident on the incident surface is incident with light of a second color different from the light of the first color, and the emitting surface transmits the light of the first color in a first region. The light of the second color is emitted from a second region different from the first region.

The luminaire according to the present disclosure has a simple structure and can emit light that gradually changes between the light of the first color and the light of the second color.

FIG. 1 is a perspective view illustrating the lighting fixture according to the first embodiment. FIG. 2 is a cross-sectional view illustrating the lighting fixture according to line II-II of FIG. FIG. 3 is a perspective view illustrating a lighting state of the lighting fixture according to the first embodiment. FIG. 4 is a cross-sectional view illustrating an optical path of light emitted by the lighting fixture according to the first embodiment. FIG. 5 is a perspective view illustrating a lighting fixture according to a modified example of the first embodiment. FIG. 6 is a cross-sectional view illustrating an optical path of light emitted by the lighting fixture according to the second embodiment. FIG. 7 is a cross-sectional view illustrating an optical path of light emitted by a lighting fixture according to another modification.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Each of the embodiments described below is a specific example of the present disclosure. Therefore, the numerical values, shapes, materials, components, arrangement positions of the components, connection forms, etc. shown in the following embodiments are examples and are not intended to limit the present disclosure. Therefore, among the components in the following embodiments, the components not described in the independent claims are described as arbitrary components.

It should be noted that each figure is a schematic view and is not necessarily exactly illustrated. Further, in each figure, substantially the same configuration is designated by the same reference numerals, and duplicate description will be omitted or simplified.

Further, in the following embodiments, expressions such as substantially matching are used. For example, a near match means not only a match, but also a substantial match, that is, an error of, for example, a few percent. In addition, substantially agreement means agreement to the extent that the effects of the present disclosure can be achieved. The same applies to expressions using other "abbreviations".

In the following description, in FIG. 1, the light guide body with respect to the reflector is referred to as a Z-axis plus direction, and the opposite side thereof is referred to as a Z-axis minus direction. The same applies to FIGS. 2 and later.

Hereinafter, the lighting fixture according to the embodiment of the present disclosure will be described.

(Embodiment 1)
<Structure: Lighting equipment 1>
FIG. 1 is a perspective view illustrating the lighting fixture 1 according to the first embodiment.

As shown in FIG. 1, the luminaire 1 is a luminaire using a columnar or plate-shaped light guide body 10, and is arranged on a table such as a desk or the like. The lighting fixture 1 of the present embodiment may be installed on a building material such as a ceiling or a wall. The lighting fixture 1 can illuminate a space by irradiating the surroundings with light. The lighting fixture 1 of the present embodiment mainly illuminates the surroundings by emitting light in a direction orthogonal to the length direction of the long light guide body 10. The lighting fixture 1 of the present embodiment is an edge light type light guide body 10.

The luminaire 1 includes a reflector 20, a light source 30, a wavelength control member 40, and a light guide 10.

[Reflector 20]
FIG. 2 is a cross-sectional view illustrating the lighting fixture 1 according to the line II-II of FIG. FIG. 2A is a cross-sectional view illustrating the lighting fixture 1 before changing the distance to the light source 30, and FIG. 2b is a cross-sectional view illustrating the lighting fixture 1 after changing the distance to the light source 30.

As shown in FIGS. 1 and 2, the reflector 20 is arranged at the end of the light guide body 10 and has a tubular shape capable of guiding the light emitted by the light source 30 to the incident surface 11a. Specifically, the reflector 20 has a bottomed tubular shape, and accommodates the wavelength control member 40 and the light source 30 in the internal space K. In the reflector 20, the end edge on the Z-axis plus direction side on one end side opens 43, and the end edge on the Z-axis minus direction side on the other end side closes.

The inner surface of the reflector 20 is a reflecting surface that reflects the light emitted by the light source 30. That is, the light emitted by the light source 30 is mirror-finished in order to efficiently enter the light guide body 10. The reflector 20 may be, for example, a metal such as aluminum, or a white resin or the like.

The reflector 20 supports the light source 30 arranged at the bottom, which is the edge on the negative side of the Z axis, so as to face the light guide body 10. Further, the reflector 20 supports the light guide body 10 in a posture in which the incident surface 11a of the light guide body 10 and the light source 30 face each other. The light guide body 10 is inserted into the opening 43 on the Z-axis plus direction side at one end side of the reflector 20, and the reflector 20 supports the light guide body 10 in an upright posture.

In the present embodiment, the reflector 20 is formed with a step portion 42 on the inner surface that supports the light guide body 10 inserted into the opening 43. The step portion 42 is an annular groove portion that supports the light guide body 10 in an upright posture by contacting the end surface of the light guide body 10 on the incident surface 11a side. That is, the step portion 42 has a role of aligning the incident surface 11a of the light guide body 10 with respect to the optical axis of the light source 30 and holding the posture of the light guide body 10. Further, by arranging the ring-shaped spacer 45 on the step portion 42, the distance between the light emitting surface of the light source 30 and the incident surface 11a of the light guide body 10 can be changed.

The light guide body 10 may be fixed to the reflector 20 by a screw or the like attached around the reflector 20, and the means for maintaining the posture of the light guide body 10 with respect to the reflector 20 is in the present embodiment. Not limited. Also in this case, the distance between the light emitting surface of the light source 30 and the incident surface 11a of the light guide body 10 can be changed by tightening the screws.

Further, although the reflector 20 has a cylindrical shape in the present embodiment, it may have a polygonal tubular shape, a semi-cylindrical shape, or the like. The shape of the reflector 20 may be appropriately set according to the shape of the light guide body 10, that is, the cross-sectional shape of the light guide body 10 in the length direction.

[Light source 30]
The light source 30 is housed in the reflector 20 and is arranged at the bottom of the reflector 20. The light source 30 is held at the bottom of the reflector 20 in a posture of emitting light to the light guide body 10. That is, the light source 30 is held by the reflector 20 in a posture in which the light emitting surface of the light source 30 faces the light guide body 10 and the optical axis of the light source 30 intersects the light guide body 10. In the present embodiment, the light source 30 is arranged inside the reflector 20 so that the optical axis substantially coincides with the central axis O of the reflector 20. Here, the optical axis is a straight line that substantially coincides with the emission direction of the main light emitted by the light source 30.

A part of the light of the first color emitted by the light source 30 is incident on the incident surface 11a without passing through the wavelength control member 40. Further, another part of the light of the first color emitted by the light source 30 is incident on the incident surface 11a by controlling the wavelength of the light of the first color to the light of the second color via the wavelength control member 40.

Each of the plurality of light sources 30 is, for example, an SMD (Surface Mount Device) type LED (Light Emitting Diode) element. Each of the plurality of light sources 30 has a light emitting element which is an LED chip and a phosphor which emits fluorescence by wavelength-converting the light emitted by the light emitting element. As the light source 30, a COB (Chip On Board) type light emitting module may be used.

The light emitting element is an LED chip arranged in a resin-molded cavity, and emits light that becomes the light emitted from the luminaire 1. The light emitting element is sealed in the cavity by a resin containing a phosphor. That is, the SMD type LED element is a package type LED element in which the light emitting element is sealed with this resin.

The light source 30 may be electrically connected to the power supply circuit and supplied with power from the power supply circuit. Further, the luminaire 1 may include a power supply circuit. The light source 30 may be turned on and off by being controlled by a control unit (not shown) provided in the power supply circuit. The light source 30 may be controlled by a control unit provided in the power supply circuit to perform dimming and toning. For example, the light source 30 may employ a surface mount type LED element that emits white light by combining a blue LED chip and a yellow phosphor-containing resin.

[Wavelength control member 40]
The wavelength control member 40 may be a wavelength conversion member that converts the light of the first color into the light of the second color by converting the light emitted by the light source 30 into wavelength. The wavelength control member 40 includes a phosphor that emits wavelength conversion light upon irradiation with light, and the phosphor is dispersed and held in a binder that is a transparent material made of ceramic such as glass or silicone resin. The wavelength control member 40 is, for example, a YAG (Yttrium aluminum Garnet) -based phosphor, a Cousin-based phosphor, an escalated-based phosphor, a BAM (Ba, Mg, Al) -based phosphor, or the like, and is an emission surface 11b of the light guide body 10. It can be appropriately selected according to the color of the light emitted from.

Further, the wavelength control member 40 may be an optical thin film (color filter) using a dielectric multilayer film. The wavelength control member 40 absorbs a part of the light emitted by the light source 30 and reflects the other light. The wavelength control member 40 can be appropriately selected according to the color of the light emitted from the exit surface 11b of the light guide body 10 in order to reflect the light having a predetermined wavelength among the light emitted by the light source 30.

The wavelength control member 40 is arranged along the inner surface of the reflector 20. Specifically, the wavelength control member 40 is laminated on the inner surface of the reflector 20 and covers the inner surface of the reflector 20. The wavelength control member 40 is arranged in a cylindrical shape in the reflector 20 and forms a space K between the light source 30 and the incident surface 11a through which the light emitted by the light source 30 passes. As a result, when the wavelength control member 40 reflects a part of the light emitted by the light source 30, the wavelength control member 40 emits light of a predetermined color according to the properties of the wavelength control member 40.

[Light guide body 10]
The light guide body 10 has a columnar or plate shape in which a plurality of light extraction structures 12 for guiding the light emitted by the light source 30 and emitting the light from the emission surface 11b are formed. In the present embodiment, the light guide body 10 is a light-transmitting member having a light-transmitting property and having a long columnar shape in the Z-axis direction. The light guide body 10 is supported by the reflector 20 by inserting the end portion on the negative direction side of the Z axis into the opening 43 of the reflector 20 so as to cover the opening 43 of the reflector 20. When supported by the reflector 20, the central axis O of the light guide 10 in the length direction substantially coincides with the optical axis of the light source 30.

The light guide body 10 has an incident surface 11a and an exit surface 11b.

The incident surface 11a is a surface on which the light emitted by the light source 30 is incident, and is a surface facing the light emitting surface of the light source 30. That is, the incident surface 11a is an end surface of the light guide body 10 on the negative direction side of the Z axis. The normal line at the center of the incident surface 11a substantially coincides with the optical axis of the light source 30.

Light of the first color and light of the second color are incident on the incident surface 11a.

The light of the first color is the light emitted by the light source 30, and is the light incident on the incident surface 11a without passing through the reflector 20. The light incident on the incident surface 11a without passing through the reflector 20 is the light emitted by the light source 30 that is not reflected by the wavelength control member 40 of the reflector 20 and is directly incident on the incident surface 11a. .. The light of the second color is the light emitted by the light source 30, which is different from the light of the first color incident on the incident surface 11a via the reflector 20. The second color is a color different from the first color. That is, the wavelength of the light of the second color is different from the wavelength of the light of the first color. The light incident on the incident surface 11a via the reflector 20 means that the light emitted by the light source 30 is reflected by the wavelength control member 40 of the reflector 20 to control the wavelength from the first color to the second color. , Light indirectly incident on the incident surface 11a.

The exit surface 11b is a surface that emits light incident from the incident surface 11a, and is an outer peripheral surface of the light guide body 10 with respect to the length direction. A plurality of light extraction structures 12 for emitting light are formed on the exit surface 11b.

The light extraction structure 12 is a convex or concave portion such as a cone, a frustum, or a long groove. In the present embodiment, the light extraction structure 12 is a conical recess.

FIG. 3 is a perspective view illustrating a lighting state of the lighting fixture 1 according to the first embodiment. FIG. 3A is a perspective view illustrating a lighting state of the lighting fixture 1 before changing the distance to the light source 30, and FIG. 3b illustrates a lighting state of the lighting fixture 1 after changing the distance to the light source 30. It is a perspective view.

As shown in FIG. 3, the exit surface 11b emits the light of the first color from the first region R1 and emits the light of the second color from the second region R2 different from the first region R1. The size of the first region R1 and the second region R2 changes according to the distance between the light emitting surface of the light source 30 and the incident surface 11a. For example, when the incident surface 11a is brought closer to the light source 30, the first region R1 gradually moves in the Z-axis plus direction, and the second region R2 also moves in the Z-axis plus direction. In the light guide body 10 of the present embodiment, the length of the first region R1 in the Z-axis direction is shortened, and the length of the second region R2 in the Z-axis direction is increased. That is, the area of the first region R1 becomes smaller, and the area of the second region R2 becomes larger. Further, as the incident surface 11a is moved away from the light source 30, the first region R1 gradually moves in the negative direction of the Z axis, and the second region R2 also moves in the negative direction of the Z axis. In the light guide body 10 of the present embodiment, the length of the first region R1 in the Z-axis direction becomes long, and the length of the second region R2 in the Z-axis direction becomes short. That is, the area of the first region R1 becomes large, and the area of the second region R2 becomes small.

<Operation>
FIG. 4 is a cross-sectional view illustrating an optical path of light emitted by the luminaire 1 according to the first embodiment.

In the present embodiment, as shown in FIGS. 3 and 4, a wavelength conversion member having a red phosphor is used as the wavelength control member 40. The wavelength control member 40 converts the white light emitted by the light source 30 into red light. In such a lighting fixture 1, as shown in FIG. 3, when the light source 30 emits white light, a part of the white light is incident on the incident surface 11a of the light guide body 10 without passing through the wavelength control member 40. The light guide body 10 is guided. Since the angle of the light emitted by the light source 30 with respect to the optical axis is small, the white light reaches the end side of the light guide body 10 on the Z-axis plus direction side. As a result, white light is emitted from the first region R1 of the exit surface 11b of the light guide body 10.

Further, a part of the white light is wavelength-converted to red light by incident on the wavelength control member 40, and the red light is reflected. Then, the wavelength-converted red light is incident on the incident surface 11a of the light guide body 10 to guide the light guide body 10. Since the red light has a larger angle with respect to the optical axis of the light emitted by the light source 30 than the white light, the Z-axis minus direction of the light guide body 10 is reached by the time it reaches the end of the light guide body 10 on the Z-axis plus direction side. Light is emitted from the end side of the side. As a result, red light is emitted from the second region R2 of the exit surface 11b of the light guide body 10.

<Effect>
Next, the action and effect of the lighting fixture 1 in the present embodiment will be described.

As described above, the lighting fixture 1 of the present embodiment has a light source 30, an incident surface 11a on which the light emitted by the light source 30 is incident, and an emitting surface 11b on which the light incident from the incident surface 11a is emitted. Light emitted by a columnar or plate-shaped light guide body 10 on which a plurality of light extraction structures 12 for emitting light from an exit surface 11b are formed, and between the light guide body 10 and the light source 30. Is provided with a tubular reflector 20 that guides the light to the incident surface 11a. Further, on the incident surface 11a, first-color light, which is light emitted by the light source 30 incident on the incident surface 11a without passing through the reflector 20, and light source 30 incident on the incident surface 11a via the reflector 20 are formed on the incident surface 11a. Light of a second color different from the light of the first color, which is the emitted light, is incident. Then, the exit surface 11b emits the light of the first color from the first region R1 and emits the light of the second color from the second region R2 different from the first region R1.

According to this, a part of the light emitted by the light source 30 is incident on the incident surface 11a as the light of the first color without passing through the reflector 20. Since the light of the first color is not reflected by the reflector 20, it easily reaches the exit surface 11b on the side opposite to the exit surface 11b on the incident surface 11a side of the light guide body 10. Therefore, the light of the first color is emitted from the exit surface 11b of the light guide body 10. Further, another part of the light emitted by the light source 30 is reflected through the reflector 20 and is incident on the incident surface 11a as the light of the second color. Since the light of the second color is reflected by the reflector 20, the incident surface 11a of the light guide 10 reaches the exit surface 11b on the opposite side of the light guide 10 from the incident surface 11a. It is easy to emit light from the exit surface 11b on the side. Therefore, the light of the second color is emitted from the exit surface 11b on the incident surface 11a side of the light guide body 10. Therefore, it is difficult to complicate the structure of the lighting fixture 1.

Therefore, the luminaire 1 can emit light that gradually changes between the light of the first color and the light of the second color with a simple structure.

Further, the luminaire 1 of the present embodiment includes a wavelength control member 40 arranged along the inner surface of the reflector 20. A space K through which the light emitted by the light source 30 passes is formed between the light source 30 and the incident surface 11a.

According to this, the light of the first color that does not pass through the reflector 20 and the light of the second color that passes through the reflector 20 can be incident on the incident surface 11a of the light guide body 10. Therefore, the light of the first color and the light of the second color can be reliably emitted from the exit surface 11b of the light guide body 10.

Further, in the luminaire 1 of the present embodiment, a part of the light of the first color emitted by the light source 30 is incident on the incident surface 11a without passing through the wavelength control member 40. Then, another part of the light of the first color emitted by the light source 30 is incident on the incident surface 11a with the light of the first color being wavelength-controlled by the light of the second color via the wavelength control member 40.

According to this, the light of the first color that does not pass through the reflector 20 and the light of the second color that is wavelength-converted from the light of the first color through the reflector 20 are incident on the incident surface 11a of the light guide body 10. Can be made to. Therefore, the light of the first color and the light of the second color can be reliably emitted from the exit surface 11b of the light guide body 10.

Further, in the lighting fixture 1 of the present embodiment, the reflector 20 supports the light guide body 10 in a posture in which the incident surface 11a and the light source 30 face each other. Then, the reflector 20 changes the distance between the light guide body 10 and the light source 30.

According to this, the distance between the incident surface 11a of the light guide body 10 and the light emitting surface of the light source 30 can be changed. Therefore, by changing the distance between the light guide body 10 and the light source 30, the size and position of the first region R1 and the second region R2 can be changed. Therefore, the light of the first color and the light of the second color emitted from the exit surface 11b of the light guide body 10 can be changed with time with respect to the length direction of the light guide body 10.

(Modified Example of Embodiment 1)
The lighting fixture 100 of this modified example will be described.

FIG. 5 is a perspective view illustrating the lighting fixture 100 according to the modified example of the first embodiment.

This modification is different from the lighting fixture of the first embodiment in that a plate-shaped light guide body 110 (light guide plate) is used instead of the columnar light guide body 110. Unless otherwise specified, the other configurations in this modification are the same as those in the first embodiment, and the same configurations are designated by the same reference numerals and detailed description of the configurations will be omitted.

The housing 120 is long according to the incident surface 111a of the light guide body 110, and accommodates a plurality of light sources 130, a power supply unit, and the like. The housing 120 supports the light guide body 110 by accommodating and fixing the end portion of the light guide body 110 on the incident surface 111a side.

The light source 130 emits light that is the emission light of the light guide body 110. A plurality of light sources 130 are fixed to the housing 120 at a position facing the incident surface 111a of the light guide body 110, and a plurality of light sources 130 are arranged along the length direction of the incident surface 111a.

The light guide body 110 has a plurality of light extraction structures 112 on the surface opposite to the emission surface 111b. In the present embodiment, a plurality of light extraction structures 112 are formed on one surface, but a plurality of light extraction structures 112 may be further formed on the other surface. Further, the plurality of light extraction structures 112 may be formed on the side surface of the light guide body 110.

Also in this modified example, the same action and effect as those of the above-described first embodiment are obtained.

(Embodiment 2)
The lighting fixture 1b of the present embodiment will be described.

The present embodiment is different from the luminaire 1b of the first embodiment in that the light source 30 includes the first light source 30a, the second light source 30b, and the third light source 30c. Unless otherwise specified, other configurations in the present embodiment are the same as those in the first embodiment, and the same configurations are designated by the same reference numerals and detailed description of the configurations will be omitted.

FIG. 6 is a cross-sectional view illustrating an optical path of light emitted by the luminaire 1b according to the second embodiment.

In the present embodiment, as shown in FIG. 6, the reflector 20 accommodates one or more first light sources 30a, one or more second light sources 30b, and one or more third light sources 30c.

The light source 30 includes one or more first light sources 30a that emit light of the first color, one or more second light sources 30b that emit light of the second color, and one or more third light sources 30c that emit light of the third color. And include.

Specifically, one or more first light sources 30a are arranged on or near the central axis O of the reflector 20, and one or more second light sources 30b surround one or more first light sources 30a. The one or more third light sources 30c are arranged so as to surround the outer periphery of the one or more second light sources 30b. That is, one or more second light sources 30b and one or more third light sources 30c are arranged concentrically around a set of one or more first light sources 30a.

The first light source 30a has a first lens 30c1 that covers the cavity. The first lens 30c1 controls the light distribution so that the light emitted by the first light source 30a is incident on the incident surface 11a of the light guide body 10 without passing through the reflector 20. That is, the optical axis of the light emitted by the first light source 30a intersects the incident surface 11a.

The second light source 30b has a second lens 30c2 that covers the cavity. The second lens 30c2 controls the light distribution so that the light emitted by the second light source 30b is incident on the incident surface 11a of the light guide body 10 via the reflector 20. The optical axis of the light emitted by the second light source 30b intersects the inner surface of the reflector 20.

The third light source 30c has a third lens 30c3 that covers the cavity. The third lens 30c3 controls the light distribution so that the light emitted by the third light source 30c is incident on the incident surface 11a of the light guide body 10 via the reflector 20. The optical axis of the light emitted by the third light source 30c intersects the inner surface of the reflector 20. The intersection P2 where the optical axis of the third color light emitted by the third light source 30c intersects the inner surface of the reflector 20 is the intersection of the optical axis of the second color light emitted by the second light source 30b and the inner surface of the reflector 20. It is located closer to the light source 30 than P1.

<Effect>
Next, the action and effect of the lighting fixture 1b in the present embodiment will be described.

As described above, in the luminaire 1b of the present embodiment, the light source 30 includes a first light source 30a that emits light of the first color and a second light source 30b that emits light of the second color. The optical axis of the light emitted by the first light source 30a intersects the incident surface 11a, and the optical axis of the light emitted by the second light source 30b intersects the inner surface of the reflector 20.

According to this, the first light source 30a can make the light of the first color incident on the incident surface 11a of the light guide body 10 without passing through the reflector 20. Since the light of the first color is not reflected by the reflector 20, it easily reaches the exit surface 11b on the side opposite to the exit surface 11b on the incident surface 11a side of the light guide body 10. Therefore, the light of the first color is emitted from the exit surface 11b of the light guide body 10. Further, since the light of the second color is reflected by the reflector 20, the incident surface 11a of the light guide 10 reaches the exit surface 11b on the opposite side of the light guide 10 from the incident surface 11a. It is emitted from the exit surface 11b on the side. Therefore, the light of the second color is emitted from the exit surface 11b on the incident surface 11a side of the light guide body 10. As described above, in the lighting fixture 1b, the optical axis of the light emitted by the first light source 30a intersects the incident surface 11a of the 0 light guide body 10, and the optical axis of the light emitted by the second light source 30b intersects the reflector 20. By doing so, the light of the first color from the first region R1 and the light of the second color can be emitted from the light source R2 from the exit surface 11b of the light guide body 10. Therefore, in this luminaire 1b, the structure is not easily complicated, and it is possible to emit light that gradually changes between the light of the first color and the light of the second color with a simple structure.

The action and effect in the present embodiment have the same action and effect as those in the above-described first embodiment.

(Other variants)
The lighting fixtures according to the present disclosure have been described above based on the modifications of the first and second embodiments and the first embodiment, but the present disclosure describes the above-described first and second embodiments and the first embodiment. It is not limited to the modified example.

For example, in the luminaire 1c according to the second embodiment, the luminaire 1c may include a wavelength conversion member on the reflector 20. FIG. 7 is a cross-sectional view illustrating an optical path of light emitted by a lighting fixture according to another modification. The lighting, extinguishing, dimming, and toning of the first light source 30a, the second light source 30b, and the third light source 30c are controlled by a control unit provided in the power supply circuit. In the lighting fixture 1c of the other modified example, the wavelength control member 40 arranged along the inner surface of the reflector 20 may be provided. Further, the light source may further include a third light source 30c. Further, the intersection P4 where the optical axis of the light of the third color emitted by the third light source 30c intersects with the wavelength control member 40 is the intersection of the optical axis of the light of the second color emitted by the second light source 30b and the wavelength control member 40. It may be located closer to the light source than P3. According to this, for example, by lighting the second light source 30b and the third light source 30c separately, the second region R2 seems to move in the length direction of the light guide body 10. For example, the second region R2 can be moved by controlling the lighting and extinguishing of the second light source 30b and the third light source 30c even if the light guide body 10 is not provided with a driving mechanism for driving the reflector 20. Can be done. Therefore, it is difficult for the lighting fixture 1c to become large and the structure is difficult to be complicated.

Further, in the lighting fixture 1c according to the second embodiment, a reflecting member that reflects the light that has guided the light guide body may be arranged on the tip surface in the Z-axis plus direction of the light guide body.

Further, in the luminaire according to the above-described first and second embodiments and the modified examples of the first embodiment, the light of the first color may be light having a color temperature different from that of the light of the second color. In this case, the light of the first color may be light having a lower color temperature than the light of the second color, or may be light having a higher color temperature. In this case, if there is only one light source, the concentration or type of the phosphor in the cavity may be different. For example, the concentration or type of the phosphor in the cavity between the light emitting element and the reflector may be different from the concentration or type of the phosphor in the cavity between the light guide and the light emitting element.

It should be noted that the first embodiment is obtained by subjecting various modifications that can be conceived by those skilled in the art to the modified examples of the first and second embodiments described above, and the first embodiment within the scope of the present disclosure. Also included in the present disclosure are embodiments realized by arbitrarily combining the components and functions of the modifications of the first embodiment and the first embodiment.

1, 1b, 1c, 100 Lighting equipment 10, 110 Light guides 11a, 111a Incident surface 11b, 111b Emission surface 12, 112 Light extraction structure 20 Reflector 30, 130 Light source 30a First light source 30b Second light source 30c Third light source 40 Wavelength control member K Space R1 First region R2 Second region

Claims (6)

Light source and
A columnar or columnar structure having an incident surface on which light emitted by the light source is incident and an emitting surface on which light incident from the incident surface is emitted, and a plurality of light extraction structures for emitting light from the emitting surface are formed. A plate-shaped light guide and
A tubular reflector that is arranged between the light guide and the light source and guides the light emitted by the light source to the incident surface is provided.
On the incident surface, first-color light, which is light emitted by the light source incident on the incident surface without passing through the reflector, and light emitted by the light source incident on the incident surface via the reflector. The light of the first color and the light of the second color different from the light of the first color are incident.
The exit surface is a lighting fixture that emits light of the first color from a first region and emits light of the second color from a second region different from the first region. A wavelength control member arranged along the inner surface of the reflector is provided.
The luminaire according to claim 1, wherein a space through which the light emitted by the light source passes is formed between the light source and the incident surface. A part of the light of the first color emitted by the light source is incident on the incident surface without passing through the wavelength control member.
Another part of the light of the first color emitted by the light source is such that the light of the first color is wavelength-controlled by the light of the second color via the wavelength control member and is incident on the incident surface. The lighting equipment according to 2. The light source includes a first light source that emits light of the first color and a second light source that emits light of the second color.
The optical axis of the light emitted by the first light source intersects the incident surface and
The luminaire according to claim 1 or 2, wherein the optical axis of the light emitted by the second light source intersects the inner surface of the reflector. A wavelength control member arranged along the inner surface of the reflector is provided.
The light source further includes a third light source.
The intersection of the optical axis of the third color light emitted by the third light source and the wavelength control member is greater than the intersection of the optical axis of the second color light emitted by the second light source and the wavelength control member. The lighting fixture according to claim 4, which is located on the light source side. The reflector is
The light guide body is supported in a posture in which the incident surface and the light source face each other.
The luminaire according to any one of claims 1 to 5, wherein the distance between the light guide and the light source is variable.

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