Lighting fixtures, air conditioners, and control systems

Abstract

Improve the sense of openness in the space. The air conditioner comprises: a casing having an air inlet and an air outlet, and an illumination opening located at a position visually recognizable by a user in the installed state; a blower disposed in an air passage connecting the air inlet and the air outlet; a first light source disposed in the casing; a light emitter disposed in a position visually recognizable from the illumination opening in the casing, the light emitter having a light input portion and a first light output portion, light emitted from the first light source entering the light input portion, the first light output portion emitting first light generated based on light and including light simulating natural light; and a light extraction portion disposed in at least one position around the light emitter in the casing, the light extractor causing second light of the light incident on the light emitter that does not exit as the first light and reaches an end of the light emitter, or second light that enters from the first light source or a second light source different from the first light source without passing through the light emitter to be emitted toward a space outside the casing facing the illumination opening, the light extraction portion being disposed in the air passage.

Description

Technical Field

[0001] The present invention relates to a lighting fixture, an air conditioner, and a control system using the lighting fixture and the air conditioner. Background Art

[0002] There is a lighting technology that emits light imitating the sky, such as the blue sky, from a main surface to make it look like a window, thereby enhancing the sense of openness of the space (for example, Patent Document 1).

[0003] Furthermore, as a structure in which a lighting fixture and an air conditioner are integrated, Patent Document 2 discloses an example of a circulator including a lighting fixture.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: International Publication No. 2019 / 220656

[0007] Patent Document 2: Japanese Utility Model Application Laid-Open No. 59-029633 Summary of the Invention

[0008] Problems to be solved by the invention

[0009] However, the lighting technology described in Patent Document 1, while allowing the viewer to feel like a window, is insufficient in providing a more natural view, such as the wind from outside or the changing shape of sunlight over time.

[0010] Furthermore, although the circulator with lighting fixture described in Patent Document 2 integrates the air circulation function and the lighting function, it does not disclose the details or specific method of integrating the air circulation function and the lighting function for the purpose of providing a more natural landscape.

[0011] Therefore, an object of the present invention is to provide a lighting fixture, an air conditioner, and a control system that enhance the sense of openness of a space where an observer is located.

[0012] Means for solving problems

[0013] One embodiment of the air conditioner of the present invention is characterized in that it comprises: a casing having an air intake and an air outlet, and an illumination opening located at a position visually recognizable by a user in the set state; a blower disposed in an air path connecting the air intake and the air outlet; a first light source disposed in the casing; a light-emitting body disposed in a position visually recognizable from the illumination opening in the casing, having a light incident portion and a first light exit portion, light emitted from the first light source enters the light incident portion, the first light exit portion emits first light generated based on the light emitted from the first light source and including light simulating natural light; and a light extraction portion disposed in at least one position around the light-emitting body in the casing, so that second light of the light incident on the light-emitting body that does not exit as the first light and reaches the end of the light-emitting body, or second light incident from the first light source or a second light source different from the first light source that does not pass through the light-emitting body and is emitted toward a space outside the casing facing the illumination opening, the light extraction portion being disposed in the air path.

[0014] In addition, one embodiment of the lighting fixture of the present invention is characterized in that it comprises: a first light source; a light-emitting body having a light incident portion and a first light emitting portion, wherein light emitted from the first light source enters the light incident portion, and the first light emitting portion emits a first light generated based on the light and including light simulating natural light; and a light extraction portion, which is arranged at the end of the light-emitting body and at least one position around the light-emitting body, so that the second light of the light incident on the light-emitting body that does not exit as the first light and reaches the end of the light-emitting body, or the second light that enters from the first light source or a second light source different from the first light source without passing through the light-emitting body, is emitted toward a space facing the surface of the light-emitting body on which the first light emitting portion is formed.

[0015] Furthermore, the control system of the present invention is characterized by comprising: the air conditioner or lighting fixture; and a control unit that controls the light emission state of the light emitting body and the light extraction unit included in the air conditioner or lighting fixture.

[0016] Effects of the Invention

[0017] According to the present invention, it is possible to provide a lighting fixture, an air conditioner, and a control system that further enhance the sense of openness of a space. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a perspective view showing a schematic structure of a lighting unit.

[0019] Figure 2 It is a cross-sectional view showing a schematic structure of a lighting unit.

[0020] Figure 3 This is a structural diagram showing a schematic structure of a light source included in the lighting unit.

[0021] Figure 4It is a structural diagram showing an example of arrangement of light sources included in a lighting unit.

[0022] Figure 5 This is a perspective view showing an example of the shape of a diffuser included in the lighting unit.

[0023] Figure 6 This is a perspective view showing an example of the shape of a diffuser included in the lighting unit.

[0024] Figure 7 It is an explanatory diagram showing an example of light guidance of light Li and an example of generation of light Ls in a diffuser included in the lighting unit.

[0025] Figure 8 This is an explanatory diagram showing an example of the angular distribution of scattered light intensity due to Rayleigh scattering by a single particle.

[0026] Figure 9 It is a cross-sectional view showing another structural example of the lighting unit.

[0027] Figure 10 This is a cross-sectional view showing an example of the structure of the lighting fixture according to the first embodiment.

[0028] Figure 11 This is a cross-sectional view showing another example of the lighting fixture according to Embodiment 1.

[0029] Figure 12 This is an explanatory diagram showing another example of the light extraction portion and an example of arrangement of each component as viewed from the visual confirmation side.

[0030] Figure 13 This is a cross-sectional view showing a modified example of the lighting fixture according to the first embodiment.

[0031] Figure 14 This is a perspective view showing a modified example of the lighting fixture according to the first embodiment.

[0032] Figure 15 This is a cross-sectional view showing a modified example of the lighting fixture according to the first embodiment.

[0033] Figure 16 This is a cross-sectional view showing a modified example of the lighting fixture according to the first embodiment.

[0034] Figure 17 This is a cross-sectional view showing a modified example of the lighting fixture according to the first embodiment.

[0035] Figure 18 This is a cross-sectional view showing an example of the structure of the air conditioner according to Embodiment 2.

[0036] Figure 19 This is an explanatory diagram showing an example of an air passage and an optical path in the air conditioner according to the second embodiment.

[0037] Figure 20 This is a cross-sectional view showing another example of the air conditioner according to Embodiment 2.

[0038] Figure 21 This is a cross-sectional view showing another example of the air conditioner according to Embodiment 2.

[0039] Figure 22 This is a cross-sectional view showing a modified example of the air conditioner according to Embodiment 2.

[0040] Figure 23 This is a cross-sectional view showing a modified example of the air conditioner according to Embodiment 2. DETAILED DESCRIPTION

[0041] Implementation method 1.

[0042] Hereinafter, embodiments of the lighting fixture, air conditioner, and control system of the present invention will be described with reference to the accompanying drawings. The following embodiments are merely examples, and the embodiments can be appropriately combined or modified.

[0043] In the following figures, the scale of the dimensions may be changed depending on the components. Furthermore, in the following embodiments, for ease of explanation, the coordinate axes of the XYZ rectangular coordinate system may be shown in the figures. In this case, the main emission direction, which is the direction in which the first light is emitted, is set to the +y-axis direction. Here, the first light refers to the light that the lighting fixture, as the target, primarily intends to emit, such as scattered light simulating the sky. Furthermore, in the case of the side-lit illuminator described later, the direction of travel of the incident light is set to the +z-axis direction.

[0044] Here, the main emission direction can also be interpreted as the direction normal to the main light-emitting surface of the lighting fixture. The main light-emitting surface refers to a specifically specified surface within the light-emitting surface of the lighting fixture or the light-emitting element of the lighting fixture. More specifically, the main light-emitting surface can be a surface within the light-emitting surface of the lighting fixture or the light-emitting element of the lighting fixture that is specifically intended to be visually recognized by the observer as the light-emitting surface emitting the first light. Furthermore, in the case of a lighting fixture simulating a window, the main light-emitting surface can also be the surface whose normal direction faces the interior of the room when the lighting fixture is installed as a window.

[0045] For example, if the light-emitting element of a lighting fixture is in the shape of a plate, the main light-emitting surface may be one of two surfaces connected by side surfaces. In the following description of a shape, the two surfaces connected by side surfaces may be referred to as main surfaces, and the side surfaces of a plate shape, i.e., the surfaces forming the end faces of the main surface in the plate shape, may be referred to simply as end faces or side surfaces.

[0046] Furthermore, for example, if the light-emitting element of a lighting fixture is rod-shaped, the main light-emitting surface may also be one of the side surfaces of the column, or a portion of the side surface of the column. Here, a rod shape refers to a column with two bottom surfaces connected by one or more side surfaces. Furthermore, "rod" is a general term for columns. Hereinafter, in a rod-shaped structure, the one or more side surfaces connected by the bottom surface may be referred to as the main surface, and the bottom surface of the column, i.e., the end surface forming the main surface in a rod-shaped structure, may be referred to simply as the end surface or side surface.

[0047] Furthermore, the main light-emitting surface is not limited to a flat surface and may also include, for example, a curved or inclined surface. In other words, the main light-emitting surface may be curved or inclined, or may be a surface shape that is a combination of two or more of a flat surface, a curved surface, or an inclined surface. Furthermore, if the main light-emitting surface includes a curved or inclined surface, the normal direction of the main light-emitting surface may be set to the normal direction of the center portion or the normal direction of the tangent plane. Furthermore, if the normal direction of the main light-emitting surface is not fixed to a single direction, such as in a cylindrical shape, the normal direction at any position on the main light-emitting surface may be set to the main emission direction.

[0048] Implementation method 1.

[0049] Hereinafter, Embodiment 1 will be described with reference to the drawings.

[0050] First, an example of a lighting unit included in the lighting fixture with a ventilation function, the air conditioner, and the control system of the present invention will be described.

[0051] <Example of Lighting Unit 100>

[0052] Figure 1 and Figure 2 : is a schematic structural diagram showing an example of the lighting unit 100 according to the first embodiment. Figure 1 is a perspective view showing a schematic structure of the lighting unit 100. Figure 2 It is a cross-sectional view showing a schematic structure of the lighting unit 100 .

[0053] The lighting unit 100 includes a light source 10 and a diffuser 20. In the present invention, the diffuser 20 and one or more light sources 10 provided in a pair with the diffuser 20 are collectively referred to as the lighting unit 100. In other words, the lighting unit 100 is a pair of light sources 10 and diffusers 20. Although not shown, the lighting unit 100 may also include a frame that supports the light source 10 and the diffuser 20.

[0054] In the following content, for ease of explanation, the y-axis direction is set as the thickness direction (up and down direction) of the diffuser 20, the z-axis direction is set as the horizontal direction (left and right direction), and the x-axis direction is set as the longitudinal direction (front and back direction) for explanation, but the above directions may not be consistent with the directions in the actual setting state.

[0055] exist Figure 2 In the example shown, the main light-emitting surface is surface f22. Alternatively, the main light-emitting surface may be a portion of surface f22. Furthermore, the main light-emitting surface may be formed on surface f22. Hereinafter, when the main light-emitting surface is formed on a portion of the surface, that portion may be referred to as the main light-emitting area, and the area opposite thereto may be referred to as the backside area.

[0056] Hereinafter, the light incident on the end face of the diffuser 20 is sometimes referred to as light Li. Furthermore, the first light emitted from the diffuser 20 (in this example, scattered light simulating the sky) is sometimes referred to as light Ls. Furthermore, in the following description, the light guided within the diffuser 20 is sometimes referred to as light Lt or propagated light Lt. Here, "light guiding" means propagating light incident on a medium along a prescribed optical path within the medium. Therefore, light Lt does not include light scattered or absorbed within the diffuser 20.

[0057] As will be described later, the light Ls is not limited to be emitted from one emission surface in the diffuser 20. For example, the light Ls may be emitted from a surface f23 on the opposite side of the surface f22.

[0058] Light Source 10

[0059] Figure 3 1 is a structural diagram showing a schematic structure of a light source included in the lighting unit 100. Figure 4 1 is a structural diagram showing an example of the arrangement of the light source provided in the lighting unit 100. The light source 10 may be, for example, an LED light source. Figure 3 As shown, the light source 10 may also include a substrate 12 and an LED element 13. Figure 3 In the example shown, a plurality of LED elements 13 are provided. Furthermore, the LED elements 13 are arranged on the substrate 12. Here, the LED element is an example of a light-emitting element. In addition, the light-emitting element is not limited to the LED element, and may be, for example, a laser light-emitting element, a fluorescent tube, etc.

[0060] The light source 10 is provided so as to face the end face of the end portion of the surface f22 forming the main light-emitting surface of the diffuser 20. For example, the light source 10 includes a light-emitting surface f11 that emits light Li as incident light entering the diffuser 20, and the light-emitting surface f11 is arranged so as to face the end face of the end portion of the surface f22 forming the main light-emitting surface of the diffuser 20.

[0061] like Figure 4 As shown, the lighting unit 100 may include multiple light sources 10 for a single diffuser 20. Here, a unit of light source 10 is a unit that can be independently controlled for on / off, light emission, or light color. Alternatively, the lighting unit 100 may include only one light source 10 for a single diffuser 20.

[0062] In the following description, a group (including a single light source) of light sources or light-emitting elements that radiate incident light to generate light Ls onto one diffuser 20 may be collectively referred to as a light source 10. Furthermore, in the following description, the light source 10 is used as a subject to describe the function of a light source that emits light Li. However, this function can also be considered as the function of one light source or one light-emitting element included in the lighting unit 100, or as the function of a combination of multiple light sources or multiple light-emitting elements.

[0063] As an example, in Figure 3 In the example of the structure of the light source 10 shown in FIG, each LED element 13 in the figure can also be regarded as one light source 10. In this case, one of the light sources 10 corresponding to each LED element 13 in the figure can be Figure 3 The structure of the light source 10 shown in FIG. 1 (i.e., the structure including a plurality of LED elements 13). Figure 4 In the illustrated arrangement example of the light sources 10 , each light source 10 in the figure can also be regarded as a single LED element 13 .

[0064] The light source 10 emits light Li as incident light to the diffuser 20. The light source 10 emits, for example, white light as the light Li. Alternatively, the light source 10 may emit, for example, light having a predetermined correlated color temperature Tci as the light Li.

[0065] The correlated color temperature Tci is, for example, 6500 K. Alternatively, the correlated color temperature Tci is, for example, 5000 K. The correlated color temperatures of the lights emitted by the light sources 10 may be the same or different from each other.

[0066] The color of the light Li emitted from the light source 10 may also be a color other than white. For example, the lighting unit 100 may include a white light source and a green light source as the light source 10. Furthermore, the lighting unit 100 may include a white light source, a green light source, and an orange light source as the light source 10. Furthermore, the lighting unit 100 may include white light sources of different color temperatures as the light source 10. For example, the lighting unit 100 may include a white light source of high color temperature and a white light source of low color temperature as the light source 10.

[0067] Here, the color temperature difference between high color temperature white and low color temperature white is, for example, 8800K. The correlated color temperature of high color temperature white is, for example, 14400K. The correlated color temperature of high color temperature white is, for example, 11500K or higher. Furthermore, the correlated color temperature of high color temperature white is, for example, 19000K or lower. The correlated color temperature of low color temperature white is, for example, 5600K. The correlated color temperature of low color temperature white is, for example, 5500K or higher. Furthermore, the correlated color temperature of low color temperature white is, for example, 6050K or lower.

[0068] In addition, the light source 10 Figure 4 In addition to being arranged opposite to one end surface of the end portion of the surface f22 forming the main light-emitting surface as shown, for example, it may be arranged opposite to two or more end surfaces of the end portion of the surface f22.

[0069] For example, the light source 10 (more specifically, the light emitting surface f11 of the light source 10) may be arranged opposite to at least one of the end surfaces of the end portion of the surface f22 forming the main light emitting surface of the diffuser 20. In addition, for example, a plurality of light sources 10 may be arranged along at least one of the end surfaces of the end portion of the surface f22 forming the main light emitting surface of the diffuser 20. In addition, as described later, the lighting unit 100 may be a structure that allows light to enter from the back side (surface f23) of the diffuser 20 and emits light Ls from the front side (surface f22). In such a case, the light source 10 may also be arranged opposite to the back side of the diffuser 20. Hereinafter, regardless of the position of the light source 10, as long as it functions as a light source that allows light Li to enter one diffuser 20, it shall be regarded as the light source 10 of this embodiment.

[0070] Figure 5 and Figure 6 2 is a perspective view showing an example of the shape of the diffuser 20. For example, when the diffuser 20 is Figure 5 In the case of a rectangular plate shape shown, having four side surfaces (surfaces f21a, f21b, f21c, and f21d in the figure) and two main surfaces (surfaces f22 and f23 in the figure) connected to the four side surfaces, the light source 10 can also be configured as described below.

[0071] As an example, the light source 10 may be arranged opposite the end face f21a of the diffuser 20. In this case, a plurality of light sources 10 may be arranged along the end face f21a of the diffuser 20. Furthermore, as an example, the light source 10 may be arranged opposite the end faces f21a and f21b of the diffuser 20. In this case, a plurality of light sources 10 may be arranged along the end faces f21a and f21b of the diffuser 20. Furthermore, as an example, the light source 10 may be arranged opposite the side face f21a, end face f21b, and end face f21c of the diffuser 20. In this case, a plurality of light sources 10 may be arranged along the end face f21a, side face f21b, and end face f21c of the diffuser 20. Furthermore, as an example, the light source 10 may be arranged opposite the side face f21a, end face f21b, end face f21c, and end face f21d of the diffuser 20. In this case, a plurality of light sources 10 may be arranged along the end surface f21 a , the end surface f21 b , the end surface f21 c , and the end surface f21 d of the diffuser 20 .

[0072] Furthermore, as an example, the light source 10 may be arranged facing at least one of the end faces f21a, f21b, f21c, and f21d of the diffuser 20. In this case, a plurality of light sources 10 may be arranged along at least one of the end faces f21a, f21b, f21c, and f21d of the diffuser 20.

[0073] Furthermore, the shape of the diffuser 20 is not limited to a rectangular plate. If the diffuser 20 has other shapes, the positional relationship between the end face and the light source can be replaced, for example, by applying to another end face opposite a certain end face, or another end face adjacent to a certain end face. Alternatively, the positional relationship between the end face and the light source can be replaced, for example, by applying to another partial region located opposite a certain partial region, or another partial region located adjacent to a certain partial region, on a connected side surface.

[0074] In addition, for example, the main light emitting surface of the diffuser 20 is formed as follows Figure 6 In the case of the side surface (main surface f22 in the figure) of the rod shape connected by two bottom surfaces (end surfaces f21a and f21b in the figure) as shown, the light source 10 may be arranged as follows.

[0075] As an example, the light source 10 may be arranged opposite to the end face f21a of the diffuser 20. In this case, only one light source 10 may be arranged relative to the end face f21a of the diffuser 20, or multiple light sources 10 may be arranged therein. For example, multiple light sources 10 may be arranged along the outer peripheral shape of the end face f21a, or uniformly within the surface. Furthermore, as an example, the light source 10 may be arranged opposite to the end face f21a and the end face f21b of the diffuser 20. In this case, only one light source 10 may be arranged relative to each of the end faces f21a and the end face f21b of the diffuser 20, or multiple light sources 10 may be arranged therein. For example, multiple light sources 10 may be arranged relative to the end faces f21a and the end face f21b, or uniformly within the surface.

[0076] Furthermore, the light Li from the light source 10 can be replaced with light obtained by guiding external light (such as sunlight), for example, in a ZEB (Zero Energy Building) scenario. This external light can be guided using a lighting component or light guide that takes in the external light and emits it in a predetermined direction. The lighting unit 100 can also include such a lighting component or light guide as the light source 10.

[0077] Diffuser 20

[0078] Next, the diffuser 20 will be described with reference to the accompanying drawings. In this example, light Li from the light source 10 is incident on the end of the surface f22 of the diffuser 20 in the +z-axis direction, and light Ls generated by the scattering effect of the diffuser 20 is emitted from the surface f22, thereby making the diffuser 20 visually recognizable as a light-emitting body that emits light close to that of the natural sky. The diffuser 20 is an example of a light-emitting body provided in a lighting fixture. Hereinafter, the diffuser 20, which is a light-emitting body that emits the desired first light, may sometimes be simply referred to as a light-emitting body 20 or a light-emitting panel 20. In addition, the shape of the light-emitting panel 20 is not limited to a plate shape.

[0079] The diffuser 20 has a light incident surface for incident light Li and a light exit surface (more specifically, a main light emitting surface) for emitting light Ls as the first light. In this example, the surface f22, which serves as the first surface, corresponds to the light exit surface (particularly the main light emitting surface), and the surface f21, which serves as the end surface of the surface f22 forming the main light emitting surface, corresponds to the light incident surface. Furthermore, the diffuser 20 may further have a surface f23, which serves as a second surface, on the opposite side of the first surface.

[0080] Alternatively, the main light-emitting surface may be a portion of the first surface. Alternatively, the main light-emitting surface may be formed on the first surface. Alternatively, the light-incident surface may be a portion of the surface f21 that is the end surface of the surface f22. Alternatively, the light-incident surface may be formed on the end surface. In the following description, the first surface may be referred to as the front surface f22, and the second surface on the opposite side may be referred to as the back surface f23. Alternatively, the end surface may be referred to as the side surface f21.

[0081] The diffuser 20 allows light Li emitted from the light source 10 to enter. The diffuser 20 also guides the incident light Li. The diffuser 20 also guides the incident light Li as light Lt. The diffuser 20 also guides the light Lt and emits light Ls.

[0082] Figure 7 1 is an explanatory diagram showing an example of light guiding of light Li and an example of light generation of light Ls in a diffuser included in a lighting unit. Figure 7 As shown, the diffuser 20 may allow the light Li emitted from the light source 10 to enter from the side surface f21, guide it as light Lt inside, and scatter a part of it to be emitted as light Ls from at least the front surface f22.

[0083] The diffuser 20 includes a substrate 201 and particles 202 .

[0084] Particles 202 are, for example, nanoparticles. "Nanoparticles" refer to particles with a size on the nanometer (nm) scale. Nanoparticles generally refer to particles with a size of 1 nm to several hundred nm. Particles 202 are, for example, particles with a particle size on the nanometer scale.

[0085] The particles 202 may be spherical or in other shapes.

[0086] The diffuser 20 may include multiple types of particles 202. In this case, the particle size of the particles 202 may be used as the average particle size. In addition, the diffuser 20 may include particles other than nanoparticles as one type of the multiple types of particles 202.

[0087] The particles 202 are, for example, inorganic oxides, such as ZnO, TiO2, ZrO2, SiO2, and Al2O3.

[0088] The particles 202 scatter the light Li incident on the diffuser 20 to convert it into light Ls. Furthermore, the particles 202 scatter the light Lt propagating through the diffuser 20 to convert it into light Ls.

[0089] The substrate 201 includes particles 202. The particles 202 may also be added to the substrate 201. The particles 202 are dispersed in the substrate 201, for example.

[0090] The substrate 201 is not particularly limited and may be, for example, a transparent material. The substrate 201 does not need to be transparent at all wavelengths of the light Li. For example, the substrate 201 may absorb a specific wavelength among the wavelengths of the light Li.

[0091] The transmittance (straight transmittance) of the substrate 201 at a light guide distance of 5 mm is preferably 90% or more, more preferably 95% or more, and further preferably 98% or more at the design wavelength. Here, the design wavelength only needs to be a predetermined wavelength among the wavelengths of the incident light. The design wavelength is not limited to one wavelength, but can also be multiple wavelengths or wavelengths with a width (band). For example, when the incident light is white light, the design wavelength can also be one or more wavelengths of 450nm, 550nm, and 650nm. In addition, the design wavelength can also be three wavelengths of 450nm, 550nm, and 650nm.

[0092] The substrate 201 is, for example, a solid. The substrate 201 may be, for example, a resin plate made of a thermoplastic polymer, a thermosetting resin, or a photopolymerizable resin. Alternatively, acrylic polymers, olefin polymers, vinyl polymers, cellulose polymers, amide polymers, fluorine polymers, urethane polymers, silicone polymers, or imide polymers may be used as the resin plate. The diffuser 20 may also be formed by, for example, dispersing the particles 202 in a pre-cured material of the substrate 201 and then performing a curing process. Furthermore, the substrate 201 is not limited to a solid and may also be a liquid, liquid crystal, or gel-like substance.

[0093] In addition, the diffuser 20 can also be formed by a porous material, an organic molecular dispersed material, an organic-inorganic hybrid material (also referred to as an organic-inorganic nanocomposite material) or a metal particle dispersed material made by a sol-gel method. As an example, the diffuser 20 can also be an organic-inorganic hybrid resin, for example, a mixed resin of a resin and an inorganic oxide. In this case, the diffuser 20 has an inorganic oxide as a substance equivalent to the particles 202 that is generated by sol-gel solidification using a base material 201 containing an inorganic oxide material and an organic compound as a substrate. In addition, in the present invention, the fine pores and the like generated by such a manufacturing process are also regarded as particles 202.

[0094] Alternatively, the diffuser 20 may be a diffuser having fine concave and convex portions smaller than the wavelength of blue light formed on the surface of the substrate 201. In this case, the diffuser 20 includes fine concave or convex portions formed on the surface of the substrate 201 as particles 202. In this case, the maximum diameter of the concave or convex portions is preferably on the nanometer scale (e.g., 1 nm to several hundred nm).

[0095] The diffuser 20 is not limited to a specific structure as long as it has a scattering capability. For example, the particles 202 and the base material 201 may not be clearly distinguished as different components within the diffuser 20 .

[0096] Furthermore, at least one surface of the diffuser 20 may be coated with a light-transmitting functional coating such as an anti-reflective coating, an anti-fouling coating, a heat-insulating coating, or a water-repellent finish. Furthermore, considering the functionality of the window (impact resistance, water resistance, heat resistance, etc.), the diffuser 20 may be sandwiched between two transparent substrates (e.g., glass plates). In this case, the diffuser 20 may also serve as an interlayer film for laminated glass.

[0097] The diffuser 20 is, for example, in the shape of a plate. In addition, the plate shape is not limited to a flat plate shape. That is, the plate shape may also be a curved shape. For example, the diffuser 20 may also be in a shape in which either one or both of the front surface f22 and the back surface f23 (the first surface and the second surface) are curved. When the front surface f22 and the back surface f23 are curved, the directions of the curvatures of the two may be consistent or inconsistent. For example, the surfaces of both sides may be convex (a shape that bulges outward). Or, for example, the surfaces of both sides may be concave (a shape that bulges inward). Or, for example, the surface of one side may be a convex curved surface and the surface of the other side may be a concave curved surface. Alternatively, the diffuser 20 may include an inclination, a step, a depression, a convex portion, etc. on a part of the surface. The relationship between the front surface f22 and the back surface f23 described above can also be applied as a relationship between opposing side surfaces, for example.

[0098] The diffuser 20 is, for example, in the shape of a rod. The rod shape is not limited to a shape such as a cylinder, a quadrangular prism, or a triangular prism, in which the cross section parallel to the extension direction of the rod is rectangular, or a shape in which the girth of the rod is constant in the height direction. The extension direction of the rod is, for example, a rod having a bottom surface of the rod as a Figure 5 The z-axis direction in the case of the surface f21a. Furthermore, the rod shape also includes shapes equivalent to a plate shape. In this case, a rod shape whose bottom surface of the column corresponds to the main surface of the plate shape and whose bottom surface serves as the main light-emitting surface can also be considered a plate shape.

[0099] In the case where the diffuser 20 is in a rod shape, the extension direction of the column is set to the z-axis direction. The axial direction parallel to the main emission direction, that is, the y-axis direction, is set to be the normal direction of the side surface of the column. Therefore, the main light-emitting surface is set to be a part of the side surface of the column. In addition, the incident surface is set to at least one bottom surface of the column. In the case where the diffuser 20 is in a rod shape, the area forming the main light-emitting surface in the side surface of the column can also be regarded as the first surface. In addition, the area opposite to the first surface in the side surface of the column can also be regarded as the second surface. In addition, the two bottom surfaces of the column can also be regarded as side surfaces. In addition, the side surface can also include areas other than the first surface or the second surface in the side surface of the column.

[0100] The shape of the diffuser 20 when viewed from above (the shape in the xz plane in the figure, hereinafter referred to as the front view shape) is not particularly limited. For example, the front view shape of the diffuser 20 may be rectangular, polygonal, circular, barrel-shaped, bobbin-shaped, or any other shape formed by connecting two or more straight lines, two or more circular arcs, or one or more straight lines and one or more circular arcs.

[0101] Furthermore, the side-view shape of the diffuser 20 (the shape on the xy plane and the shape on the yz plane in the figure, hereinafter referred to as the side shape) is not particularly limited. For example, the side shape of the diffuser 20 may be rectangular, barrel-shaped, bobbin-shaped, or another shape formed by connecting four or more straight lines including two opposing straight lines, or a shape formed by connecting two or more straight lines including two opposing straight lines and two or more arcs.

[0102] In the following description, the diffuser 20 of the first embodiment is assumed to be in a plate shape as an example.

[0103] The side surface f21 (end surface) allows light Li emitted from the light source 10 to enter. The side surface f21 is arranged to face the light emitting surface 11 of the light source 10, for example.

[0104] The front surface f22 (first surface) emits light Ls scattered by particles 202 (including not only nanoparticles but also nanoscale compositions (sol-gel solidified oxides, etc.). Hereinafter, they are also collectively referred to as nanoscale optical media.). Herein, the nanoscale optical medium is not particularly limited as long as it is an optical medium (including interfaces) that causes the light Lt to undergo Rayleigh scattering or a scattering phenomenon similar to Rayleigh scattering within the substrate 201. In addition, the front surface f22 can also emit light Lt after being guided within the diffuser 20. For example, the front surface f22 can also emit light that is guided within the diffuser 20 and reaches the end opposite to the incident surface as light that reproduces sunlight. In the present invention, unless otherwise specified, "particles 202" is used as a general term for such nanoscale optical media.

[0105] In addition, the back surface f23 (second surface) may also emit light Ls scattered by the particles 202. In addition, the back surface f23 may also emit light Lt after being guided within the diffuser 20. For example, the back surface f23 may also emit light that has been guided within the diffuser 20 and has reached the end opposite to the incident surface to the outside for the purpose of preventing stray light.

[0106] The back surface f23 faces the front surface f22. Light Lt incident on the diffuser 20 is reflected by the front surface f22 and the back surface f23 and guided. The light Lt is guided, for example, by total reflection. For example, the light Lt is guided within the diffuser 20.

[0107] In addition, the surfaces other than the front surface f22 or the back surface f23 may also emit the light Ls scattered by the particles 202. In addition, the surfaces other than the front surface f22 or the back surface f23 may also emit the light Lt guided in the diffuser 20.

[0108] Rayleigh scattering

[0109] Below, refer to Figure 8 Rayleigh scattering, one of the light scattering phenomena, will be described. Figure 8 1 is a diagram showing an example of the angular distribution of scattered light intensity due to Rayleigh scattering by a single particle 202 .

[0110] For example, the light Li emitted from the light source colliding with the particle 202 will be described. Alternatively, the light colliding with the particle 202 may be the light Lt guided within the diffuser 20. The vertical axis Z is parallel to the direction of travel of the light Li. The light Li travels in the +Z-axis direction. The horizontal axis X is perpendicular to the vertical axis Z.

[0111] Rayleigh scattering occurs when light collides with particles whose particle size is smaller than the wavelength of visible light. The wavelength of visible light is, for example, in the range of 380 nm to 780 nm. Specifically, Rayleigh scattering occurs when the size parameter α represented by the particle size d and the wavelength λ of the light satisfies the following equation (1). In the equation, "·" represents a multiplication operation.

[0112] α<<π·d / λ···(1)

[0113] In Rayleigh scattering, the scattering cross-sectional area σ is a parameter indicating the probability of scattering, and has a relationship with the particle diameter d and the wavelength λ of light as shown in the following formula (2).

[0114] σ∝d 6 / λ 4 ···(2)

[0115] According to equation (2), the scattering cross-sectional area σ in Rayleigh scattering is inversely proportional to the fourth power of the wavelength λ of light. Therefore, in Rayleigh scattering, the shorter the wavelength of light, the greater the probability of scattering. Thus, according to equation (2), blue light is more likely to be scattered than red light. For example, the wavelength λ of blue light is 450nm. For example, the wavelength λ of red light is 650nm.

[0116] In addition, Figure 8 shows the intensity distribution of unpolarized scattered light. The particle size d of particle 202 is 100 nm. The refractive index n of particle 202 is 1.43. The refractive index of substrate 201 is 1.33. The wavelength of light is 450 nm.

[0117] like Figure 8 As shown in FIG, in Rayleigh scattering, scattered light is radiated in all directions. Therefore, even if light enters from the side surface f21 of the diffuser 20, light can be extracted from the front surface f22 and the back surface f23 perpendicular to the side surface f21.

[0118] Simulating the Generation of Scattered Light from the Sky

[0119] Below, refer to Figure 7 and Figure 8 The principle of generating scattered light that simulates the sky (particularly the blue sky) will be described.

[0120] As already described, the light Li emitted from the light source 10 enters from the side surface f21 of the diffuser 20. The light Li entering from the side surface f21 is guided into the diffuser 20 as light Lt. The entering light Lt is reflected by the front surface f22 and the back surface f23 of the diffuser 20 (see FIG. Figure 7 ).

[0121] When a part of the light Lt propagates in the diffuser 20, it collides with the particles 202 and the like (or its path is blocked by the particles 202 and the like). The light Lt that collides with the particles 202 and the like is scattered in all directions (see Figure 8 ).

[0122] Of the scattered light, light that enters the front surface f22 at an incident angle equal to or less than the critical angle is emitted from the front surface f22 as light Ls. The critical angle is the minimum incident angle at which total internal reflection occurs when light travels from a portion with a high refractive index to a portion with a low refractive index.

[0123] Of the scattered light, light that enters the back surface f23 at an incident angle below the critical angle is emitted from the back surface f23 as light Ls. The critical angle is the minimum incident angle at which total internal reflection occurs when light travels from a portion with a high refractive index to a portion with a low refractive index.

[0124] In this case, according to equation (2), in Rayleigh scattering, the shorter the wavelength of light, the greater the probability of scattering. Therefore, the correlated color temperature Tcs of the scattered light is higher than the correlated color temperature Tci of the incident light. For example, the correlated color temperature Tci is the correlated color temperature of the light Li emitted by light source 10. For example, the correlated color temperature Tcs is the correlated color temperature of the light Ls.

[0125] When light Li has a spectral distribution across the entire visible light range, blue light is preferentially scattered. Light Li is, for example, white light. Light source 10 comprises, for example, a white LED. Therefore, by appropriately designing light source 10 and diffuser 20, light Ls can have a correlated color temperature of blue, representing a color close to the actual sky.

[0126] In addition, since the amount of light Ls depends on the amount of light of the incident light Li, by appropriately selecting the amount of light of the light source 10 used, it is possible to reproduce the color of the sky while having sufficient brightness as a lighting fixture. In addition, by appropriately designing the light guiding direction, light guiding distance and particle concentration of the light Lt in the diffuser 20, the thickness of the diffuser 20 can be reduced. For example, according to the structure of the present embodiment, the thickness of the diffuser 20 can be made less than 100 mm. In addition, for example, the thickness of the diffuser 20 can be less than 20 mm, or less than 10 mm. In addition, for example, the thickness of the diffuser 20 can also be less than 5 mm. In addition, for example, when the size of the light source 10 (the length in the Y-axis direction) is small, and when the light Li is light with a small irradiation range in the incident surface, such as light emitted from a laser light source or converged point light, the thickness of the diffuser 20 can also be less than 1 mm.

[0127] In addition, in the above example, the surface is divided into two as the front side f22 and the back side f23, but in the case of a rod-shaped diffuser 20 and the main surface (the side of the rod shape) is entirely used as the main light-emitting surface, the above-mentioned front side f22 can be interpreted as "the area of ​​the main surface facing the +y-axis direction", and the above-mentioned back side f23 can be interpreted as "the area of ​​the main surface facing the -y-axis direction".

[0128] Figure 9 1 is a cross-sectional view showing another structural example of the lighting unit 100. Figure 9 As shown, the lighting unit 100 may also include a back panel 30 in addition to the light source 10 and the diffuser 20. The back panel 30 is disposed on the back side of the diffuser 20 (in the -y-axis direction in this example). The back panel 30 may also be disposed opposite the back side f23 of the diffuser 20. Furthermore, it is preferred that the back panel 30 and the diffuser 20 be close in distance.

[0129] Back plate 30 has a reflective function or is opaque, and its transmittance is preferably 50% or less, more preferably 10% or less.

[0130] The back plate 30 is preferably a diffuse reflector, more preferably a white diffuse reflector. The back plate 30 may also be a light absorber.

[0131] The back panel 30 can also be configured to be openable and closable. By configuring the back panel 30 to be openable, the user can open the back panel 30 when they wish to visually inspect the back space or admit light. This allows the user to visually inspect the back space or admit light through the diffuser 20, and also allows the lighting unit 100 to function as a window. The back panel 30 can also be configured to be openable and closed by folding the back panel 30 or storing it in a retractable case, similar to blinds or movable shutters.

[0132] Back plate 30 may be configured to change its shielding state by applying a voltage to back plate 30 , like a liquid crystal shutter. Back plate 30 may be configured to change its shielding state by applying a voltage to back plate 30 , like a liquid crystal panel.

[0133] Alternatively, the rear panel 30 may be supported integrally with the diffuser 20 within the housing 500. In this case, the rear panel 30 may be supported integrally with the diffuser 20 so as to be openable and closable.

[0134] Effect of Back Panel 30

[0135] When the light source 10 is illuminated, light Ls is emitted not only from the front surface f22 of the diffuser 20 but also from the back surface f23. For example, if the front surface f22 of the wall partitioned by the wall faces the observer (hereinafter referred to as the inner side), the observer cannot visually identify the light Ls emitted from the back surface f23 toward the back surface f23 side (hereinafter referred to as the outer side), resulting in light loss. Furthermore, if the lighting unit 100 also functions as a window, the outwardly emitted light Ls may cause light pollution for people outside the wall other than the observer.

[0136] By providing the back panel 30 on the back side f23 of the diffuser 20, the light Ls emitted from the back side f23 of the diffuser 20 when the light source 10 is turned on can be prevented from being emitted outward. In addition, by using a component that reflects the light Ls emitted from the back side f23, such as a diffuse reflector, as the back panel 30, the light Ls emitted from the back side f23 can be emitted from the front side f22, thereby improving the light utilization efficiency of the lighting unit 100, and more specifically, improving the efficiency of using the light Li as the first light.

[0137] Thus, by providing the back plate 30 on the back side of the diffuser 20 , it is possible to improve the light utilization efficiency in the lighting unit 100 and reduce the light leakage to the back side.

[0138] <Structure of Lighting Fixture 200>

[0139] Next, a lighting fixture 200 according to the present embodiment will be described with reference to the drawings. Figure 10 1 is a cross-sectional view showing an example of the structure of the lighting fixture 200 according to the first embodiment. Figure 10 As shown, the lighting fixture 200 includes a light source 10 , a light emitting body 20 , and a light extraction portion 40 .

[0140] In the lighting fixture 200, the light emitter 20 includes a light incident portion 24, a light guide portion 25, a first light emitting portion (scattered light emitting portion) 26, and a second light emitting portion (propagating light emitting portion) 27. The light emitter 20 is, for example, the diffuser 20 described above.

[0141] The light incident portion 24 receives light emitted from the light source 10. The light guide portion 25 guides the incident light. Furthermore, the light guide portion 25 guides the incident light while generating first light. The light guide portion 25 may also include a nanoscale optical medium, such as a medium and light-scattering particles. The incident light is scattered by the nanoscale optical medium during the process of being guided within the medium, thereby generating first light (light Ls).

[0142] The first light emitting portion 26 emits the first light generated by the light guide portion 25. The first light emitting portion 26 corresponds to the main light-emitting surface described above. Furthermore, the second light emitting portion 27 emits light that does not become the first light but reaches the end of the light guide, i.e., the propagated light that reaches the end of the light guide. Hereinafter, the light emitted from the second light emitting portion 27 will sometimes be referred to as light Lo.

[0143] The light-emitting element 20, for example, includes a light-incident portion 24 at a first end and a second light-emitting portion 27 at a second end opposite the first end. Furthermore, in the case of a backlight configuration, in which the light-emitting element 20 receives light from the backside, the second light-emitting portion 27 may be provided on the same surface as the first light-emitting portion 26. Furthermore, as will be described later, in the case of a light deflection portion 50 or the like that changes the direction of propagation light, provided opposite the light-incident portion 24, the location of the second light-emitting portion 27 is not limited to the second end. For example, the second light-emitting portion 27 may be provided on a portion of the surface on which the first light-emitting portion 26 is provided, regardless of whether the light-emitting element 20 is a sidelight or backlight configuration.

[0144] The light Li emitted from the light source 10 enters the interior of the light-emitting body 20 from the light-incident portion 24. The light Li incident on the light-emitting body 20 is guided as light Lt by the light-guiding portion 25 within the light-emitting body 20, becomes light Ls, and is then emitted from the first light-emitting portion 26. Furthermore, the light Li incident on the light-emitting body 20 is guided as light Lt by the light-guiding portion 25 within the light-emitting body 20, and then is emitted from the second light-emitting portion 27 as light Lo.

[0145] For example, when the light emitting body 20 is the above-mentioned diffuser 20 that generates the first light using Rayleigh scattering or a scattering phenomenon similar to Rayleigh scattering, the correlated color temperature of the light Lo emitted from the second light emitting portion 27 is lower than the correlated color temperature of the light Ls emitted from the first light emitting portion 26.

[0146] In the lighting fixture 200 of this embodiment, at least a portion of the light Lo emitted from the second light emitting portion 27 is emitted in the same direction as the light Ls (in the example in the figure, in the direction of the space facing the main light emitting surface where the first light emitting portion 26 is provided, that is, the +y-axis direction) through the light extraction portion 40 arranged near the second light emitting portion 27.

[0147] The light extraction portion 40 may also have a deflection function, that is, a function of changing the direction of travel of the light Lo emitted from the second light emitting portion 27 so that it is directed in a specific direction. The specific direction may be, for example, a direction perpendicular to the light guide direction of the light Lt (not limited to the +y-axis direction, but also including the -y-axis direction), the direction of travel of the light Ls, or, as already described, a direction toward the space facing the main light-emitting surface of the first light emitting portion 26, or a direction toward the space where the user of the lighting device is located. Furthermore, the deflection referred to here also includes deflection caused by transmission such as refraction, as well as deflection caused by reflection.

[0148] Furthermore, the light extraction portion 40 may be formed with, for example, a lens, a reflector, a thin film, or a surface coating to control the refraction, reflection, diffusion, or transmission of the light Lo serving as the outgoing light. In this manner, the light extraction portion 40 only needs to have the function of redirecting incident light in a specific direction after changing any of its traveling direction, amplitude, irradiation range, and intensity distribution.

[0149] As a specific example, the light Lo emitted from the second light emitting section 27 is scattered light that diffuses in an angular direction. In order to deflect this scattered light so that it illuminates a space located in a specific direction (such as the space where the observer is located), the light extraction section 40 may be configured as a reflector having a curvature. With such a structure, the light reflected by the light extraction section 40 can be controlled to be substantially parallel light and directed in a specific direction.

[0150] Furthermore, in order to achieve a structure that prevents glare when a person viewing the light extraction portion 40 from a specific direction observes the light extraction portion 40, the light extraction portion 40 may also have a diffusion function. In this case, glare experienced by the person can be suppressed, and the light emitted from the second light emitting portion 27 can be extracted as light traveling in a specific direction.

[0151] Although not shown, a light extraction portion 40 may also be provided at the first end portion where the light source 10 is provided. However, in this case, the light extraction portion 40 does not deflect light emitted from the second light emitting portion 27 of the light emitting element 20 into a specific direction. Instead, the light extraction portion 40 deflects light emitted from the first end portion, the light source 10, or other light sources into a specific direction in a space facing the first end portion of the light emitting element 20 where the light incident portion 24 is provided. Hereinafter, the light extraction portion 40 provided in this space facing the first end portion may be referred to as the second light extraction portion 40a.

[0152] By providing such a light extraction portion 40, it is possible to make the light Lo simulate sunlight, for example. That is, it is possible to give the observer an illusion that there is a sun on the back side of the light-emitting body 20, and sunlight from the sun is incident from the light-emitting body 20 or the periphery of the light-emitting body 20. In addition, for example, in a case where the light-emitting body 20 simulates a window by emitting a first light simulating the sky, by arranging the light extraction portion 40 at a position where the observer can visually confirm it, it is also possible to make the light extraction portion 40 feel as if it is a window frame illuminated by sunlight. In this case, it is also possible to make a part of the light extraction portion 40 a non-luminous area by reducing the reflectivity of the area. By providing such a non-luminous area on the surface of the light extraction portion 40, it is also possible to express the sun facing and the shade facing on the light extraction portion 40.

[0153] Figure 11 (a) is a cross-sectional view showing another structural example of the lighting fixture 200 . Figure 11 The lighting fixture 200a shown in (a) has Figure 10 In addition to the structure of the lighting fixture 200 shown, it also includes a light limiting section 80. The light limiting section 80 is arranged between the light emitting element 20 (particularly the second light emitting section 27) and the light extraction section 40, and has the function of reducing the light emitted from the light emitting element 20 toward the light extraction section 40. By providing the light limiting section 80 that blocks a portion of the light Lo on the optical path from the second light emitting section 27 to the light extraction section 40, a portion of the light extraction section 40 can be made into a non-luminous area.

[0154] The light limiting unit 80 is composed of a member such as a mask that absorbs or reflects at least a portion of incident light. Figure 11 In the example shown, a substantially triangular member that limits light transmittance is provided as the light limiting portion 80. More specifically, in this example, the light limiting portion 80 absorbs at least a portion of the light emitted from the second light emitting portion 27 that reaches the light limiting portion 80.

[0155] The light limiting section 80 reduces the intensity of light traveling from the second light emitting section 27 toward the light extraction section 40 in a partial area, thereby projecting a shadow of the light limiting section 80 onto the light extraction section 40. Light intensity is also referred to as light quantity per unit area or brightness.

[0156] Figure 11 (b) shows the shadow of the light limiting section 80 projected onto the light extraction section 40. In this example, the light extraction section 40 includes a bright region 401 and a dark region 402. The dark region 402 is, for example, the region where the shadow of the light limiting section 80 is projected. In this example, the intensity of light emitted from the dark region 402 is lower than the intensity of light emitted from the bright region 401.

[0157] also, Figure 11(c) is a diagram showing the method for forming Figure 11 (b) is a top view of an example of the arrangement of the components of the bright area 401 and the dark area 402. Figure 11 (c) is equivalent to Figure 11 (b) AA cross-sectional view. Figure 11 As shown in (c), for example, the light limiting portion 80 can also be arranged in the dark area 402, or in an area corresponding to the dark area 402 on the optical path from the light Lo emitted from the second light emitting portion 27 to the incident surface of the light extraction portion 40 and emitted from the exit surface of the light extraction portion 40 as light toward a specific direction.

[0158] The light limiting portion 80 can also be set, for example, to cover the dark area 402 or an area corresponding to the dark area 402 between the end of the light-emitting body 20 where the second light emitting portion 27 is provided and the light extraction portion 40, on the surface of the incident surface or the exit surface of the light extraction portion 40 forming the light Lo emitted from the second light emitting portion 27, or at various interfaces within the light extraction portion 40.

[0159] also, Figure 12 This is an explanatory diagram showing another example of the light extraction portion 40 as viewed from the visual confirmation side and an example of arrangement of each component. Figure 12 (a) shows a state where the shadow of the light limiting portion 80 is projected onto the light extraction portion 40 . Figure 12 (b) is a diagram showing the method for forming Figure 12 FIG. 4 is a top view of an example of arrangement of components in the bright region 401 and the dark region 402 shown in FIG. Figure 12 (b) is equivalent to Figure 12 (a) BB cross-sectional view. Figure 12 As shown in (b), for example, on the basis of arranging the light limiting portion 80 in an area corresponding to the entire area of ​​the incident surface of the light extraction portion 40, an optical component (a thin film that serves as an antireflection layer relative to the base material of the light limiting portion 80) or a hole, etc., that serves to enhance the intensity of transmitted light may be provided in the bright area 401 within the light limiting portion 80 or in the area corresponding to the bright area 401 on the optical path from the time when the light Lo emitted from the second light emitting portion 27 is incident on the incident surface of the light extraction portion 40 and is emitted from the emission surface of the light extraction portion 40 as light in a specific direction. Figure 12 The example shown in (b) is an example in which a hole 81 is provided in a region corresponding to the bright region 401 in the light limiting section 80 .

[0160] By providing such a light limiting portion 80 , an observer can feel as if the light incident from the sun through the light emitting body 20 forms a sunburst and a shade on the light extraction portion 40 , thereby providing a more natural view.

[0161] The light extraction unit 40 may be provided as a modified example of the light deflection unit 50 described later, or may be provided separately from the light deflection unit 50. In this case, the light extraction unit 40 and the light deflection unit 50 may be provided together in one lighting fixture.

[0162] <Variation 1>

[0163] Figure 13 This is a cross-sectional view showing another example of the lighting fixture according to Embodiment 1. Figure 13 The illustrated lighting fixture 210 is an example in which the light-emitting element 20 includes a light deflection unit 50, which corresponds to the light extraction unit 40 described above. The light deflection unit 50 is provided at an end of the light-emitting element 20. For example, the light deflection unit 50 is provided at an end opposite the end where the light incident unit 24 is provided. In the example shown in the figure, the light deflection unit 50 is provided on one side surface of the light-emitting element 20.

[0164] The light deflection unit 50 changes the direction of travel of the light Lt. The light deflection unit 50 may also change the direction of travel of the light Lt to the specific direction described above. Alternatively, the light deflection unit 50 may include a reflective surface f51. In this case, the light deflection unit 50 may reflect the light Lt that has reached the light deflection unit 50 from the reflective surface f51, thereby changing the direction of travel of the light Lt.

[0165] The reflecting surface f51 is, for example, a mirror surface. The reflecting surface f51 is, for example, a diffuse reflecting surface. The reflecting surface f51 is, for example, provided by metal evaporation or white paint.

[0166] The light deflection unit 50 can also be formed, for example, by cutting a portion of the surface of the light emitting element 20. In this case, the cut surface becomes the reflection surface f51. Furthermore, the end of the light emitting element 20 including the cut surface serves as the light deflection unit 50. In this manner, the light emitting element 20 can also include the light deflection unit 50.

[0167] The light deflection unit 50 may be integral with the light guide unit 25 or may be separate. For example, if the light deflection unit 50 is integral with the light guide unit 25, the light deflection unit 50 may be formed at an end of the light guide unit 25. In this case, the end may also contain the particles 202. Furthermore, for example, if the light deflection unit 50 is separate from the light guide unit 25, the component forming the light deflection unit 50 may be bonded to the component forming the light guide unit 25. In this case, the component forming the light deflection unit 50 and the component forming the light guide unit 25 are optically connected.

[0168] In addition, Figure 13 In the example shown, the first light emitting portion 26 and the second light emitting portion 27 are both provided on the light emitting surface (front surface) serving as the main light emitting surface. Figure 13As shown, the first light emitting portion 26 and the second light emitting portion 27 are preferably provided in different areas within the light emitting surface. However, this is not limited to the case where the end portion forming the light deflecting unit 50 includes the particles 202. In other words, the area where the first light emitting portion 26 is provided may partially overlap with the area where the second light emitting portion 27 is provided. For example, the first light emitting portion 26 may be provided over the entire front surface of the light emitting element 20, while the second light emitting portion 27 may be provided over a portion of the front surface of the light emitting element 20.

[0169] In this way, even if the light-emitting body 20 includes the light deflection unit 50, the same effect as the structure including the light extraction unit 40 can be achieved. In this example, the light deflection unit 50 can also have a light scattering function. The light scattering function can also be achieved by performing surface processing such as corrugation on the reflective surface f51. In addition, the light scattering function can also be achieved by adding a reflective diffusive film to the reflective surface f51 or applying a white coating.

[0170] Alternatively, the member forming the light deflection unit 50 or the second light emitting unit 27 may be provided with a light scattering function. In this case, this function may be achieved by dispersing light scattering particles in the member forming the light deflection unit 50, or by subjecting the second light emitting unit 27 to surface processing such as corrugation, light diffusing coating, or by adding a light diffusing film.

[0171] <Variation 2>

[0172] Figure 14 and Figure 15 : is an explanatory diagram showing another example of the lighting fixture of embodiment 1. Figure 14 is a perspective view of a lighting fixture 220 as another example of the lighting fixture according to Embodiment 1. Figure 15 It is a cross-sectional view of the lighting fixture 220 .

[0173] The lighting fixture 220 includes a light source 10 , a light emitter 20 , a frame member 60 , and a frame light source 70 .

[0174] The frame member 60 is provided at at least one position around the light-emitting body 20. The frame member 60 is provided, for example, in a prescribed area including a certain position around the light-emitting body 20. Here, the area around the light-emitting body 20 includes a space facing the side of the light-emitting body and a space facing the main surface. The frame member 60 may be provided, for example, in a prescribed area in front of the light-emitting body 20 (a space facing the front side which is the main light-emitting surface). In addition, the frame member 60 may be provided, for example, in a prescribed area on the side of the light-emitting body 20 (a space facing the side). In addition, the frame member 60 may be provided, for example, in a prescribed area behind the light-emitting body (a space facing the back side which is the opposite side of the main light-emitting surface). Figure 14 and Figure 15 The example shown is an example in which the frame member 60 is provided in front of the light emitting body 20. Figure 14 and Figure 15 In the illustrated example, a gap is provided between the light emitting body 20 and the frame member 60 , but the frame member 60 may be provided at a position in contact with the light emitting body 20 .

[0175] The frame member 60 may also be configured so as to surround the light-emitting body 20 or the space facing the main light-emitting surface of the light-emitting body 20. In addition, the frame member 60 may also be configured so as to surround both the light-emitting body 20 and the space facing the main light-emitting surface of the light-emitting body 20. For example, the frame member 60 may also be configured around the light-emitting body 20 so as to surround the space facing the main light-emitting surface of the light-emitting body 20 (the space on the visual confirmation side). Here, the space around the light-emitting body 20 may also be set to, for example, a space within 500 mm. For example, the frame member 60 may also be set at a position within 500 mm in at least any one direction of the front, rear, and side of the light-emitting body 20.

[0176] As already described, the frame member 60 may be arranged in contact with the light emitting body 20, that is, arranged without a gap from the light emitting body 20. In this case, the light emitting body 20 and the frame member 60 may be connected with a cushioning material interposed therebetween, for example.

[0177] Furthermore, the frame member 60 can be divided into multiple sections, each of which is arranged at intervals. In this case, the arrangement direction is not particularly limited and can be the longitudinal direction of each side of the main light-emitting area, the direction of travel of the first light, or a direction from the center outward as in a double umbrella structure. Furthermore, the frame members 60 can be arranged in two or more directions. This allows the frame members 60 to have a variety of design options.

[0178] The frame member 60 has an incident surface f61 and an exit surface f62. Figure 14 In the example shown, the incident surface f61 is the surface on the side opposite to the visual confirmation side of the frame member 60, and the emission surface f62 is the surface on the visual confirmation side of the frame member 60. Here, the visual confirmation side refers to the side visually confirmed by the observer located on the main light-emitting surface side of the light-emitting body 20 in the state where the lighting fixture is installed, and the visual confirmation opposite side refers to the side opposite to the visual confirmation side. Figure 14 The example shown is an example of a transmissive frame member. If the frame member 60 is a reflective frame member, the incident surface f61 and the exit surface f62 are formed on the same surface. More specifically, the incident surface f61 and the exit surface f62 are both formed on the visual confirmation side of the frame member 60.

[0179] For convenience, the frame member 60 may also be divided into a plurality of zones (in Figure 14 In the example shown, the frame parts 60a, 60b, 60c, 60d, etc. correspond to the sides of the rectangular main light emitting area 501. In addition, the division example of the frame part 60 is not limited to Figure 14 Example shown.

[0180] The frame light source 70 is provided on the back side (ie, the side opposite to the side visible to the observer) of the frame member 60 . In other words, the lighting fixture 220 includes the frame light source 70 on the incident surface f61 side of the frame member 60 .

[0181] The frame light source 70 is, for example, an LED light source. Alternatively, the frame light source 70 may be, for example, a laser light emitting element, a fluorescent tube, or the like. Although not shown, the frame light source 70 may also include a substrate and a light emitting element, similar to the light source 10. Furthermore, the frame light source 70 may also include multiple light emitting elements, similar to the light source 10. Furthermore, the frame light source 70 may also include multiple light emitting elements, similar to the light source 10.

[0182] For example, when the frame member 60 is divided into multiple zones, the lighting fixture 220 may be configured with at least one frame light source 70 for each zone of the frame member 60. As one example, when the frame member 60 is arranged so as to surround the polygonal main light-emitting area 501, multiple frame light sources 70 may be arranged along each side of the main light-emitting area 501. As another example, when the frame member 60 is arranged so as to correspond to opposing sides of the polygonal main light-emitting area 501, multiple frame light sources 70 may be arranged along each opposing side of the main light-emitting area 501.

[0183] The frame light source 70 emits, for example, white light. Alternatively, the light emitted by the frame light source 70 may be a color other than white. The frame light source 70 may include, for example, a white LED light source and an orange LED light source. Alternatively, the frame light source 70 may include, for example, a low color temperature white LED light source and a high color temperature white LED light source.

[0184] The frame member 60 is formed of, for example, a light diffuser. The light diffuser may be a member in which fine particles are dispersed in a transparent member, a member in which the surface of the transparent member is processed, such as by corrugating the surface, a member in which a light-diffusing film is added, or a member in which a white coating is applied.

[0185] Alternatively, the frame member 60 may be composed of, for example, a transparent member and a light diffuser. In this case, the light diffuser may be positioned on the side opposite to the transparent member for visual confirmation, or on the side closer to the transparent member for visual confirmation, or both. The light diffuser may be formed, for example, by coating a thin film containing microparticles on the transparent member. The frame member 60 may also be formed by coating or laminating such a light-diffusing thin film on the transparent member.

[0186] In the case of a reflective type, the frame member 60 may be composed of, for example, a reflective member and a light diffuser. In this case, the light diffuser is provided at a position closer to the visual confirmation side than the reflective member.

[0187] The light emitted from the frame light source 70 enters the frame part 60 from the incident surface f61 of the frame part 60 and is emitted from the emission surface f62. At this time, if the frame part 60 has a light diffusion function, the light entering the frame part 60 becomes diffused light and is emitted from the emission surface f62. In this way, the observer visually recognizes the frame part 60 as a second light source simulating sunlight. For example, the frame part 60 may also have a function of changing any of the direction of travel, amplitude, irradiation range, and intensity distribution of the incident light and then directing it in a specific direction (in this case, the space where the user is located, that is, the visual confirmation side space).

[0188] The frame member 60 can illuminate the entire emission surface f62 or only a portion of it. Furthermore, if the frame member 60 is divided into multiple zones, for example, the illuminated and non-illuminated states can be determined for each zone. By controlling the lighting state of the frame light source 70 for each zone or for each position of the opposing incident surface f61, a portion of the zone or region can be set to an illuminated or non-illuminated state.

[0189] For example, by providing the aforementioned light limiting portion 80 between the frame light source 70 and the frame member 60, the intensity of light emitted from a portion of the emission surface f62 of the frame member 60 can be made weaker than the intensity of light emitted from other regions. In other words, by providing the light limiting portion 80, it is also possible to express the sun and shade on the emission surface f62 of the frame member 60. Alternatively, the frame member 60 may include the light limiting portion 80. In this case, the light limiting portion 80 is provided, for example, on the optical path of light emitted from the frame light source 70 until it is emitted from the emission surface f62 of the frame member 60.

[0190] In addition, although Figure 15An example in which the light source 10 and the frame light source 70 are provided separately is shown, but the light source 10 may also have the function of the frame light source 70. In this case, a light branching portion (not shown) may be provided between the light source 10 and the light emitting body 20, and the light branching portion branches the light into light traveling toward the light incident surface of the light emitting body 20 and light traveling toward the incident surface f61 of the frame member 60. In this case, the reflective function portion of the light branching portion may also have a light diffusion function, so that the light traveling toward the incident surface f61 of the frame member 60 becomes diffused light. Alternatively, a side-emitting light source may be used as the light source 10, and a reflective component or the like may be used to cover an area of ​​the light source 10 other than the area facing the light incident surface of the light emitting body 20, so that the light emitted from the area facing the light incident surface of the light emitting body 20 is directed toward the light incident surface of the light emitting body 20, and the light emitted from the area other than the area is directed toward the incident surface f61 of the frame member 60.

[0191] Furthermore, the above-described light extraction portion 40 (including the second light extraction portion 40 a ) is also an example of the reflective frame member 60 .

[0192] In addition, if Figure 16 and Figure 17 As shown, the above-mentioned light extraction unit 40 or light deflection unit 50 may be provided instead of the frame light source 70 . Figure 16 The lighting fixture 220a shown in the figure is an example in which a light extraction unit 40 is provided instead of the frame light source 70. The light extraction unit 40 shown in this example is provided in the frame 500. Figure 16 In the lighting fixture 220a shown, light emitted from the light source 10 and incident from the light incident portion 24 of the light-emitting body 20 is guided within the light-emitting body 20, and is emitted from the second light-emitting portion 27, and the light whose direction of travel is deflected by the light extraction portion 40 is incident on the incident surface f61 of the frame part 60.

[0193] also, Figure 17 The lighting fixture 220b shown is an example in which a light deflection unit 50 is provided instead of the frame light source 70. The light deflection unit 50 shown in this example is composed of a reflection surface f51 provided on the light emitting body 20. Figure 17 In the lighting fixture 220b shown, light emitted from the light source 10 and incident from the light incident portion 24 of the light emitting body 20 is guided within the light emitting body 20, and is emitted from the second light emitting portion 27, and the light whose traveling direction is deflected by the light deflection portion 50 is incident on the incident surface f61 of the frame part 60.

[0194] By providing such a frame component 60, the frame component 60 can simulate the sun-facing area and the shaded area of ​​the window frame, and the light emitted from the frame component 60 can simulate the sunlight after being reflected in the sun-facing area of ​​the window frame. Therefore, even in an environment where there is actually no incident light from the sun, it is possible to provide the observer with a natural landscape as if the incident light from the sun is irradiating through the light source 20.

[0195] Furthermore, in the above-described configuration, the lighting fixtures 200, 200a, 200b, 210, 220, 220a, and 220b may include a drive mechanism that changes the position, angle, shape, or combination thereof of at least one of the light extraction portion 40, the frame member 60, and the light limiting portion 80. By using the drive mechanism to change the position, angle, or shape of at least one of the light extraction portion 40, the frame member 60, and the light limiting portion 80, the direction of light simulating sunlight can be changed, or the position, size, or shape of the sun-facing or shaded area formed on the light extraction portion 40 or the frame member 60 can be changed, thereby allowing the viewer to experience a more natural landscape.

[0196] For example, by using a drive mechanism to change the position, angle, or shape of the light limiting portion 80, the projection pattern of the shadow formed on the light extraction portion 40, light deflecting portion 50, or frame member 60 placed in front of the light limiting portion 80 can be changed over time. When changing the shadow projection pattern, for example, a configuration can be employed to reproduce the change in the sun's altitude depending on the time of day or season, such that the angle of the roughly triangular shadow changes. Furthermore, by using a drive mechanism to change the position, angle, or shape of the light extraction portion 40 or frame member 60, the emission direction and irradiation range of light simulating sunlight can be changed over time. Furthermore, by changing the positional relationship with the light limiting portion 80, the projection pattern of the shadow formed on the light extraction portion 40 or frame member 60 can be changed over time. Furthermore, as a form of shape change, a drive mechanism such as a motor can be used to unfold or fold the target component from a folded state.

[0197] In the above-mentioned lighting fixture, the light-emitting body 20 is not limited to the diffuser 20 that emits scattered light generated by Rayleigh scattering as described above, and is also not limited to a structure that emits scattered light simulating the sky. In other words, the first light emitted by the light-emitting body 20 is not limited to the scattered light generated by Rayleigh scattering, and is also not limited to the scattered light simulating the sky. For example, the first light may also be light that simulates light reflected on the water surface, sunlight passing through leaves, and the like. In the present invention, the first light is not particularly limited as long as it includes light that simulates light generated by sunlight in nature (hereinafter also referred to as natural light). The first light may also include, for example, natural light and artificial light. By arranging such a light-emitting body that emits the first light and the frame member described later in a prescribed positional relationship, a space containing a natural landscape can be provided, thereby enhancing the sense of openness of the space.

[0198] Therefore, the specific structure of the light-emitting element 20 is not limited. Examples of the light-emitting element 20 include a light guide plate, which is a translucent component that transmits, reflects, and guides light to diffuse it, a liquid crystal panel using liquid crystal and a backlight, and an organic EL (electroluminescent) panel. Furthermore, a preferred example of the light-emitting element 20 is a diffuser as described above that reproduces the color tone of a natural sky, such as a blue sky (i.e., a transparent blue, etc.), by utilizing a diffuser that exhibits Rayleigh scattering or similar scattering properties for incident light. However, as already explained, the light-emitting element 20 is not limited to the above examples as long as it can emit the desired first light from the main light-emitting surface.

[0199] In addition, the frame member 60 is not limited to the above-mentioned example. For example, as the frame member 60, the frame forming portion described in the PCT application (PCT / JP2019 / 020917) of the present applicant can also be used.

[0200] Hereinafter, the light extraction unit 40 , which emits light simulating sunlight in a specific direction, the light deflection unit 50 , and the frame member 60 may be simply referred to as a light extraction unit or a sunlight extraction unit without being particularly distinguished.

[0201] Implementation method 2.

[0202] Next, an air conditioner according to Embodiment 2 will be described with reference to the drawings. The air conditioner according to this embodiment includes the components of the aforementioned lighting fixture in addition to the configuration of a so-called air conditioner (general air conditioner), thereby realizing an air conditioner with a lighting function.

[0203] Figure 18 This is a cross-sectional view showing an example of the structure of the air conditioner according to Embodiment 2. Figure 18 The air conditioner 300 shown is a ceiling-embedded air conditioner in which the light emitting body 20 and the light source 10 are assembled. Figure 18As shown, air conditioner 300 includes a heat exchanger 302, a blower 303, a swing vane 304 disposed in an air passage connecting air intake 306 and air outlet 307, a filter 305, a light source 20, and a light source 10 within a housing 301 having an air intake 306, an air outlet 307, and an opening for illumination 308. In this example, air conditioner 300 is rotatably held in housing 301 and forms part of the air passage.

[0204] The suction port 306 is provided at the lower portion of the housing 301, that is, the lower surface which is visually recognized by the observer as the ceiling panel after the installation. In addition, the position of the suction port 306 is not limited to the lower portion of the housing 301, and may be provided at the side panel of the housing 301 (see FIG. Figure 20 In this case, a second air inlet for sucking indoor air into the back side of the ceiling may be provided on the ceiling surface away from the position of the air conditioner 300.

[0205] Filter 305 and heat exchanger 302 are arranged in front of suction port 306. For example, if the air conditioner body is substantially rectangular and suction port 306 is formed along the four sides of the rectangle, heat exchanger 302 can also be arranged in a substantially rectangular shape corresponding to the four sides.

[0206] The filter 305 and the heat exchanger 302 may be arranged in front of the blower 303 in the flow path of air sucked from the suction port 306 (hereinafter simply referred to as an air path), and are not limited to the example shown in the figure.

[0207] When air conditioner 300 is in operation, blower 303 starts, and indoor air from the room flows into casing 301 through intake port 306. The air flowing into casing 301 passes through the air path formed by blades 304a and 304b, passes through filter 305, and enters heat exchanger 302. After entering heat exchanger 302, the air undergoes heat exchange, is drawn into blower 303, and is delivered into the room through outlet 307. The conditioned air is then drawn back into casing 301 through intake port 306, where it circulates.

[0208] Furthermore, in this example, an opening 308 for lighting is provided at the lower portion of the housing 301, that is, at the lower surface panel facing the room side after installation, and the light-emitting body 20 is arranged so that the main light-emitting surface is located at the position of the lighting opening 308. The lighting opening 308 may also be provided, for example, at the center portion of the lower surface panel of the air conditioner. Furthermore, the light-emitting body 20 is provided so as to cover the lighting opening 308. More specifically, in the air conditioner 300, the light-emitting body 20 is provided so that its main light-emitting surface or main light-emitting area can be visually confirmed in the area surrounded by the air outlet 307 at the lower portion of the air conditioner 300. Furthermore, a light source 10 is provided at a position opposite to the light incident surface of the light-emitting body 20. In Figure 18 In the example shown, the light source 10 is provided at a position facing at least one side surface of the light emitting body 20 .

[0209] Furthermore, in the air conditioner 300 of this example, a swing blade 304 forming a part of the air path connecting the air intake 306 and the air outlet 307 is provided with the function of the above-mentioned light extraction unit 40. In this example, it can also be said that the light extraction unit 40 is arranged on the air path of the ceiling-embedded air conditioner 300. In a conventional air conditioner, in addition to a heat exchanger and a blower, a swing blade for controlling the flow (wind direction) of the inflowing or outflowing air and a driving mechanism for driving the swing blade are provided near the air intake 306 and the air outlet 307 on the air path. In addition to having the structure of such a conventional air conditioner, the air conditioner 300 of this example also has a light-emitting body 20 and a light source 10.

[0210] exist Figure 18 In the example shown, two swing blades are provided in the air duct, circumferentially following the shape of the ceiling panel of the air conditioner 300, to define the air intake 306 and the air outlet 307. In this example, at least one of the swing blades functions as the light extraction portion 40 (sunlight extraction portion). More specifically, the swing blade 304c, located closest to the side of the light source 20 opposite the side where the light source 10 is located, functions as the light extraction portion 40.

[0211] In this example, light emitted from the second light emitting portion 27 of the light emitting element 20 is emitted in a specific direction (in this example, the room-side space facing the main light-emitting surface of the light emitting element 20) via the swing blade 304c, which also functions as the light extraction portion 40. Furthermore, in this example, the angle of the swing blade 304c can be changed using a swing blade drive mechanism (not shown) included in the air conditioner 300. This allows the emission direction of the light Lo to be controlled simultaneously with the wind direction.

[0212] Figure 19 An example of the air path and light path of the air conditioner 300 is shown. Figure 19 (a) shows an example of the flow of air in the air conditioner 300. Figure 19 (b) shows an example of light emitted from the air conditioner 300 .

[0213] exist Figure 18 In the example shown, the opening at the end of the air passage, which is close to the center, is shown as the blow-out port 307, and the opening far from the center is shown as the suction port 306. Figure 19 As shown in (a), there is no particular limitation on which of the two areas divided by the two swing blades is designated as the outflow side or the inflow side. For example, the area closer to the center may be designated as the suction port 306, and the area farther from the center may be designated as the blowout port 307. Alternatively, the direction of air flow from the blower 303 may determine which area is designated as the outflow side or the inflow side.

[0214] In addition, if Figure 19 As shown in (b), in this example, light Li generated by the light source 10 provided in the housing 301 is incident on the light-emitting body 20 which is also provided in the housing 301. After the light Li is incident, the light-emitting body 20 guides it as light Lt. Then, the light-emitting body 20 guides the light Lt and simultaneously emits light Ls generated by the light Lt from the main light-emitting surface (the lower surface in the example in the figure). In addition, the light-emitting body 20 emits the light Lt that does not become light Ls but reaches the opposite end as light Lo. The light Lo emitted from the light-emitting body 20 is deflected by the swing blade 304c serving as the light extraction portion 40 and becomes light that travels toward the room side.

[0215] also, Figure 20 This is a cross-sectional view showing another structural example of the air inlet 306 and the air outlet 307 in the air conditioner 300. Figure 20 The air conditioner 300a shown in FIG. 1 is provided with an air inlet 306 on the side plate of the housing 301. Figure 20 In the illustrated example, two swing blades 304 are arranged in a peripheral direction in the air passage connected to the air outlet 307. However, a configuration in which only one swing blade is provided along each side is also possible. Thus, in the air conditioner with lighting function of this embodiment, there are no particular limitations on the position of the air inlet 306 or the number of swing blades 304.

[0216] also, Figure 21 It is a cross-sectional view showing another example of the air conditioner according to the present embodiment. Figure 21 The illustrated air conditioner 300b is an example of a wall-mounted air conditioner indoor unit in which the light emitting element 20 and the light source 10 are incorporated. Furthermore, in this example, the basic structure of the air conditioner is not particularly limited, and known structures can be utilized. For example, although not shown, the air conditioner 300b may also include an outdoor unit in addition to the indoor unit 31.

[0217] exist Figure 21In the air conditioner 300b shown, the air inlet 306 is provided, for example, at the upper portion of the indoor unit 31, that is, at the upper surface facing the ceiling after installation. In addition, the lighting opening 308 may be provided, for example, at the front portion of the indoor unit 31, that is, at the front facing the room side in the installed state. In addition, the lighting opening 308 only needs to be provided at a position where it can be visually confirmed by the user in the installed state, and may also be provided at a position other than the front. In addition, the air outlet 307 may also be provided, for example, at the lower portion of the casing 301, more specifically, at the lower surface of the indoor unit 31 or the lower end of the front. In addition, except for the difference in the installation direction of the light-emitting body 20, it may be basically the same as the ceiling-embedded air conditioners 300 and 300a. In addition, in Figure 21 In the illustrated example, only one swing blade 304 is provided at the bottom of the indoor unit 31, but two or more swing blades 304 may be provided. In this case, multiple swing blades 304 may be provided along the shape of the front panel of the indoor unit 31 so as to surround the light-emitting element 20. Furthermore, two or more swing blades 304 may be provided along the outer circumference of a single side.

[0218] The air conditioner 300, by including such a light emitting element 20 and the swing blades 304, can provide a more natural light and wind experience. Furthermore, by using a side-lighting light emitting element such as the diffuser 20 described above as the light emitting element 20, the light emitting element can be easily incorporated into the panel on the visual side without increasing the size of the air conditioner and without interfering with the original air conditioning function.

[0219] <Variation 1>

[0220] also, Figure 22 : is an explanatory diagram showing a modification 1 of the air conditioner 300. Figure 22 (a) is a cross-sectional view showing a configuration example of an air conditioner 310 as a first modification of the air conditioner 300. Figure 22 (b) is a diagram of the air conditioner 310 as viewed from the visual confirmation side. Figure 22 The air conditioner 310 shown further includes a frame light source 70 that emits light toward the swing blade 304 provided near the end portion of the light emitting body 20 where the second light emitting portion 27 is not provided.

[0221] The light-emitting surface of the frame light source 70 is opposite to the swing blade 304. Thus, the swing blade 304 provided around the end portion of the light-emitting body 20 where the second light-emitting portion 27 is not provided is used as the second light extraction portion 40a. For example, in the case where the swing blade 304 is provided so as to surround the polygonal main light-emitting area 501, the frame light source 70 may be provided along each side of the main light-emitting area 501 (except for the side corresponding to the end portion where the second light-emitting portion 27 is provided). For example, in the example shown in the figure, the frame light source 70 may be provided so as to emit light toward the swing blades 304a, 304e, and 304g. Thus, the swing blades 304a, 304e, and 304g can also be used as the second light extraction portion 40a (sunlight extraction portion).

[0222] In addition, Figure 22 In the illustrated example, the fins 304 are arranged to surround the polygonal main light-emitting area 501. However, if the fins 304 are arranged only along a portion of the rectangular main light-emitting area 501, such as two opposing sides, the frame light sources 70 do not need to be arranged along each side of the main light-emitting area 501. In other words, the frame light sources 70 can be arranged only for the fins 304 located near the main light-emitting area 501 that are not incident upon the light from the second light-emitting portion 27 of the light-emitting element 20. Furthermore, the fins 304 not used to represent sunlight are not limited to this arrangement.

[0223] exist Figure 22 In the illustrated air conditioner 310, light emitted by the frame light source 70 is deflected by the respective swing vanes 304, serving as the second light extraction portion 40a, toward the room. This allows sunlight extraction portions to be provided on two or more sides of the light source 20, thereby providing the viewer with a more natural light and breeze experience. For example, the swing vanes 304 surrounding the light source 20 can be made to feel like window frames illuminated by sunlight. Furthermore, since the amount of light directed toward the room is increased, sufficient brightness for a lighting fixture can be maintained.

[0224] In addition, each of the swing blades 304 serving as the light extraction portion 40 or the second light extraction portion 40 a may be given the same light diffusion function as that of the light extraction portion 40 and the second light extraction portion 40 a .

[0225] In addition, although not shown in the figure, similar to the light extraction portion 40 and the second light extraction portion 40a in the lighting fixture, in the air conditioner, a light limiting portion 80 can also be provided on the optical path until the light reaches each swing blade 304 serving as the light extraction portion 40 or the second light extraction portion 40a (more specifically, between the light emitting body 20 and the swing blade 304c serving as the light extraction portion 40, or between the frame light source 70 and the swing blade 304a, 304e or 304g serving as the second light extraction portion 40a).

[0226] Here, the light limiting unit 80 may be fixed to the aforementioned optical path, or it may be held rotatably or displaceably on the aforementioned optical path. In the latter case, the air conditioner may further include a drive mechanism for the light limiting unit 80. For example, the position, shape, or angle of the light limiting unit 80 may be changed by the drive mechanism, thereby changing the shadow projection pattern over time.

[0227] Alternatively, the light limiting unit 80 may be caused to swing by utilizing air flowing through the air passage. For example, a plurality of reflectors held by leaf springs may be provided as the light limiting unit 80. The leaf springs or reflectors swing in response to the wind from the air blower 303, thereby changing the projection pattern onto the light extraction unit 40 (in this example, the swing blade 304c) and the second light extraction unit 40a (in this example, the swing blade 304a).

[0228] By swinging not only the blades 304 serving as the light extraction section 40 and the second light extraction section 40a but also the light limiting section 80, the observer can feel as if sunlight is entering through the leaves. In addition, by utilizing the wind to change the projection pattern, the person can also visually feel the wind.

[0229] <Variation 2>

[0230] also, Figure 23 : is a cross-sectional view showing another modified example of the air conditioner of this embodiment. Figure 23 In the illustrated air conditioner 320, the light source 10, the frame light source 70, and the end faces of the light emitter 20 are positioned so as to be invisible from the room side. More specifically, in the air conditioner 320, the opening of the housing 301, the light source 10, the frame light source 70, and the end faces of the light emitter 20 (particularly the second light emitting portion 27) are positioned so that the light source 10, the frame light source 70, and the second light emitting portion 27 of the light emitter 20 do not overlap on a straight line in the direction of sight when viewing the interior of the housing 301 from the opening of the air duct defined by the housing 301 closest to the light emitter 20. This direction of sight can also be, for example, the direction most toward the center when viewing the interior of the housing 301 from the opening of the air duct. The line of sight direction α1 can also be set as a straight line connecting the end β2 of the shell 301 and the end β1 of the shell 301, wherein the end β2 of the shell 301 defines the lower end of the inner peripheral surface on the outer peripheral side of the opening of the air path closest to the light-emitting body 20, and the end β1 of the shell 301 defines the upper end of the inner peripheral surface on the inner peripheral side of the opening.

[0231] In this way, by arranging the light source 10 , the frame light source 70 , and the end surface of the light emitting body 20 in consideration of the viewing direction, it is possible to make people feel more natural light and wind.

[0232] In addition, in this embodiment, an example of an air conditioner having a heat exchanger and equipped with a lighting function is described. However, an air conditioner equipped with a lighting function may also be a so-called blower that does not perform heat exchange but only blows air. Even such a blower is still referred to as an air conditioner in the present invention.

[0233] In addition, although not shown in the figure, the lighting fixture and the air conditioner with lighting function of the present invention may also have a control unit that controls the luminous state (on / off, luminous color) of the light-emitting body 20 and the sunlight extraction part arranged around it.

[0234] The control unit may include, for example, a first light source driving unit that turns on, dims, or turns off the light source 10, and a second light source driving unit that turns on, dims, or turns off the frame light source (or auxiliary light source). The first light source driving unit and the second light source driving unit may be controlled in a manner that is correlated with each other, or they may be controlled independently.

[0235] The following shows an example of the control unit controlling the luminous color of the light-emitting body 20 and the sunlight extraction unit. Assuming that the light-emitting body 20 is a lighting panel that simulates the blue sky seen through the window on a sunny day, it is preferred that the bright area 401 can simulate the sun-facing area of ​​the window frame on a sunny day, and the dark area 402 can simulate the shaded area of ​​the window frame on a sunny day. In such a case, it is not difficult to imagine that the bright area 401 when lit, that is, the virtual sun-facing area, is brighter than the light-emitting body 20 when lit. At the same time, the light simulating sunlight emitted from the bright area 401 (the second light) has a lower color temperature than the light simulating the blue sky (the first light) emitted from the main light-emitting surface of the light-emitting body 20. For example, the brightness of the blue sky on a sunny day is 5000 [cd / m 2 ], the brightness of the sun-facing area on the white diffuse reflection surface used in most window frame parts is 30000 [cd / m 2 ] or so. In addition, the color temperature of light when visually confirming the blue sky on a sunny day is about 20000 [K], and the color temperature of light when visually confirming the sunny area on a white diffuse reflection surface is about 5000 [K]. Therefore, it is preferred that the magnitude relationship between the brightness of the main light-emitting surface or main light-emitting area of ​​the light-emitting body 20 and the bright area 401 of the sunlight extraction part and the color temperature of the emitted light be maintained as described above. However, when the sky seen through the window is not limited to the blue sky on a sunny day, but also includes the sky on a rainy day or the sky on a cloudy day or both, it is more preferred that the ratio of the brightness between the main light-emitting surface or main light-emitting area of ​​the light-emitting body 20 and the bright area 401 of the sunlight extraction part (or the light beams emitted from them) be in the range of 20:1 to 1:30.

[0236] For example, the brightness of the main light-emitting surface or main light-emitting area of ​​the light-emitting body 20 when lit can be 100 [cd / m 2]~6000[cd / m 2 ], more preferably 500 [cd / m 2 ]~3000[cd / m 2 In contrast, the brightness of the bright area 401 of the sunlight extraction portion when lit can be 300 [cd / m 2 ]~30000[cd / m 2 ], more preferably 1000 [cd / m 2 ]~12000[cd / m 2 ]. Furthermore, the correlated color temperature of the first light emitted from the light emitting body 20 may be 10,000 [K] to 100,000 [K], and more preferably 20,000 [K] to 80,000 [K]. In contrast, the correlated color temperature of the second light emitted from the bright region 401 may be 2,000 [K] to 7,000 [K], and more preferably 2,500 [K] to 6,500 [K].

[0237] Furthermore, the difference in correlated color temperature between the first light emitted by the luminous body 20 and the second light emitted by the bright region 401 of the sunlight extraction portion may be 20,000 K or more and 98,000 K or less.

[0238] Furthermore, when the sunlight extraction portion includes a dark region 402, the ratio of the brightness (or light beam) of the bright region 401 to the dark region 402 when illuminated is preferably in the range of 100:1 to 20:1, more preferably approximately 10:1. This relationship is established under clear skies and is not limited to this under cloudy skies or at night.

[0239] In addition, the control unit may be provided in a place different from the main body of the lighting fixture or the air conditioner. For example, the control unit may be provided in an external server. In this case, the main body of the lighting fixture or the air conditioner is connected to the server provided with the control unit via a network. For example, in a control system for controlling a plurality of air conditioners in a building, etc., a lighting function may be installed in each air conditioner, and the control unit provided in the control system controls the lighting function while controlling the air conditioning function. In addition, regarding the control system, in a control system for controlling a plurality of lighting fixtures, the light-emitting body 20 and the light extraction unit may be provided in pairs in each lighting fixture, and the control unit provided in the control system controls the light-emitting state of the light-emitting body 20 while controlling the light-emitting state of the light extraction unit.

[0240] Label Description

[0241] 100: lighting unit;

[0242] 10: light source;

[0243] 12: Substrate;

[0244] 13: LED components (light-emitting components);

[0245] 20: diffuser (luminous body);

[0246] 24: light incident portion;

[0247] 25: light guide;

[0248] 26: first light emitting portion;

[0249] 27: second light emitting portion;

[0250] 201: substrate;

[0251] 202: particles;

[0252] 30: back panel;

[0253] 40: light extraction portion;

[0254] 50: light deflection unit;

[0255] 60: frame components;

[0256] 70: Light source for frame;

[0257] 501: main light-emitting area;

[0258] 200, 200a, 210, 220, 220a, 220b: lighting fixtures;

[0259] 300, 300a, 300b, 310, 320: air conditioners;

[0260] 31: Indoor unit;

[0261] 301: housing;

[0262] 302: heat exchanger;

[0263] 303: air blower;

[0264] 304a~304h: swing leaves;

[0265] 305: filter;

[0266] 306: Suction port;

[0267] 307: Blowing outlet;

[0268] 308: opening for lighting;

[0269] 500: Frame.

Claims

1. An air conditioner, characterized in that: The air conditioner comprises: a housing having an air inlet and an air outlet, and an opening for lighting located at a position where the housing can be visually recognized by a user in a set state; a blower, which is provided in an air passage connecting the suction port and the blowout port; a first light source disposed in the housing; a light emitting body provided in a position within the housing that can be visually confirmed from the lighting opening, the light emitting body comprising a light incident portion into which light emitted from the first light source enters, and a first light emitting portion that emits first light generated based on the light and including light simulating natural light; a light extraction portion provided in the housing at at least one position around the light emitting body, and configured to cause second light of the light incident on the light emitting body that does not exit as the first light and reaches an end portion of the light emitting body, or second light incident from the first light source or a second light source different from the first light source without passing through the light emitting body to exit toward a space outside the housing facing the lighting opening; as well as a swing blade that controls the flow of air flowing into or out of the housing at the end of the air path and is held in the housing so as to be rotatable or displaceable. in, The light extraction portion is provided in the air passage, and the light extraction portion is implemented by at least one of the swing blades.

2. The air conditioner according to claim 1, wherein The light emitting body includes a second light emitting portion configured to emit the second light that has not been emitted as the first light and has not reached the light guide end portion, among the light incident on the light emitting body. The light extraction portion deflects the second light emitted from the second light emitting portion and directs the second light toward the space.

3. The air conditioner according to claim 1, wherein The air conditioner includes a first driving mechanism that changes the position, angle, or shape of the light extraction portion.

4. The air conditioner according to claim 1, wherein The air conditioner includes a light limiting section provided on an optical path in the housing until the second light reaches the light extraction section, and configured to reduce the second light incident on the light extraction section.

5. The air conditioner according to claim 4, wherein The air conditioner includes a second driving mechanism that changes the position, angle, or shape of the light limiting portion.

6. The air conditioner according to any one of claims 1 to 5, wherein The air conditioner includes a second light source that emits second light having a color temperature different from a color temperature of the first light toward the light extraction portion.

7. A lighting fixture, characterized in that: The lighting device comprises: First light source; a light-emitting body having a light incident portion into which light emitted from the first light source is incident, and a first light emitting portion that emits first light generated based on the light and including light simulating natural light; a light extraction portion provided at an end portion of the light emitting body and at least one position around the light emitting body, and configured to cause second light of the light incident on the light emitting body that does not exit as the first light and reaches the end portion of the light emitting body, or second light incident from the first light source or a second light source different from the first light source without passing through the light emitting body to exit toward a space facing a surface of the light emitting body on which the first light exit portion is formed; a light limiting portion provided on an optical path of the second light until the second light reaches the light extraction portion, and configured to reduce the second light incident on the light extraction portion; and The second driving mechanism changes the position, angle or shape of the light limiting portion.

8. The lighting fixture according to claim 7, wherein: A ratio of the first light beam emitted from the first light emitting portion of the light emitting body to the second light beam emitted from the light extraction portion is within a range of 20:1 to 1:

30.

9. The lighting fixture according to claim 7 or 8, wherein: The shadow of the light limiting portion is projected onto the light extraction portion.

10. The lighting fixture according to claim 7 or 8, wherein: The light emitting body includes a second light emitting portion configured to emit the second light that has not been emitted as the first light and has not reached an end of the light emitting body, among the light incident on the light emitting body. The light extraction portion includes a bright area and a dark area. The lighting fixture includes a light limiting portion that reduces the second light emitted from the second light emitting portion to form the bright region and the dark region. The light limiting portion is arranged in the dark area or in an area corresponding to the dark area on the following optical path, which is an optical path from the second light emitted from the second light emitting portion to the incident surface of the light extraction portion and emitted from the exit surface of the light extraction portion as light toward the space.

11. The lighting fixture according to claim 10, wherein: A brightness ratio between the bright area and the dark area is in a range of 100:1 to 20:

1.

12. The lighting fixture according to claim 7, wherein The lighting fixture includes a first driving mechanism that changes the position, angle, or shape of the light extraction portion.

13. The lighting fixture according to claim 7, wherein: The lighting fixture includes a second light source configured to emit second light having a color temperature different from that of the first light toward the light extraction portion.

14. A control system, characterized in that: The control system comprises: The air conditioner according to any one of claims 1 to 6 or the lighting fixture according to any one of claims 7 to 13; and A control unit controls the light-emitting state of the light-emitting body and the light extraction unit included in the air conditioner or the lighting fixture.

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