JP2010123378A - Plane-luminescence lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a plane-luminescence lighting fixture to obtain uniform plane luminance in addition to strength bearing loads of a person, a utensil or the like. <P>SOLUTION: The plane-luminescence lighting fixture 1 includes a case 2 with an opening face 21 for light irradiation, a panel 3 with translucency suitable for the opening face 21, and a light source 4 housed in the case 2. A panel-supporting block 5 supporting the panel 3 is arranged on an inside space of the case 2. The panel-supporting block 5 includes a plurality of translucent cylindrical bodies 51 with nearly a normal direction of the opening face 21 of the case 2 as an axis, and the plurality of cylindrical bodies 51 are arrayed in plane adjacent to each other. With this, the panel-supporting block 5 supports the panel 3 without becoming an obstacle to light inside the case 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a surface-emitting luminaire that is suitable for uniformly emitting light on a relatively large floor surface in a living room or the like of a house.

  In a living room / dining room in a house, for example, there are people who eat at a dining room, while there are people who relax in a living room. is there. In such a case, if the dining room and the living room are separated using a physical partition, each person's private feeling is secured, but the feeling of opening is hindered. Therefore, there is a lighting technique called zoning that uses a light to divide the whole room of the room psychologically and gently to create a private feeling while ensuring a sense of openness without using physical partitions. FIG. 9 shows an example of lighting in which the living dining room 100 is zoned using light. In this example, a large-area surface emitting lighting fixture 102 for zoning is arranged on the floor surface of the living room 101. The surface-emitting light fixture 102 has a light source inside the housing 103 and emits light from the panel 104 having a relatively large area. A fixture 105 is loaded on the panel 104. The dining table 106 is illuminated in the vicinity of the dining table by a ceiling lighting fixture 107. The illuminance is low between the living room 101 and the dining room 106 (illustrated by a dot pattern), and the living room 101 and the dining room 106 are zoned by light from the surface-emitting lighting apparatus 102 and the ceiling lighting apparatus 107, respectively.

  As the surface light emitting lighting device 102, for example, there is an internal illumination method in which a large number of light sources are arranged uniformly and light from each light source is diffused by a diffusion plate such as a light diffusion milky panel to obtain uniform surface luminance. Known internally-illuminated surface-emitting luminaires include those in which straight tube fluorescent lamps are arranged in multiple tubes and those in which a large number of optical fibers are leaked (for example, see Patent Document 1). In addition, it is conceivable that an internal illumination type surface emitting lighting fixture in which LED modules are arrayed or a surface light source such as an organic EL arrayed to form a large area light source.

  When the surface-emitting lighting fixture 102 as described above is used as a floor lighting fixture, furniture 105 or a person such as furniture is loaded directly on the panel 104 from which light is emitted, so that it is resistant to these loads. It is difficult to ensure strength. Further, when the light emitting area is increased, a large number of light sources are required. For example, in a light source of an LED module, uneven brightness occurs between the LED chips, and in a surface light source source such as an organic EL, it is connected between the surface light source sources. It is difficult to achieve uniform surface brightness, such as eyes.

On the other hand, a method is conceivable in which a fluorescent material is applied to a surface to emit light and ultraviolet light is irradiated from a black light to the fluorescent material to emit light over a large area with uniform surface luminance. In this method, the strength against the load can be secured, but sufficient luminance for performing zoning using light cannot be obtained.
Japanese Patent Laid-Open No. 11-142652

  The present invention solves the above-described problem, and is a floor illuminator that has a strength that can withstand even when a person, furniture, or the like is mounted on a panel from which light is emitted, and that can obtain uniform surface brightness. An object of the present invention is to provide a surface-emitting luminaire suitable for use.

  In order to achieve the above object, the invention of claim 1 includes a housing having an opening surface for light emission, a translucent panel attached to the opening surface, a light source accommodated in the housing, A surface-emitting illuminator comprising: a panel support block disposed in an internal space of the housing and supporting the panel, the panel support block having a substantially normal direction of the opening surface as an axis It consists of a cylindrical body having a plurality of translucency, and these cylindrical bodies are provided adjacent to each other in a planar shape.

  According to a second aspect of the present invention, in the surface-emitting lighting fixture according to the first aspect, the light source is housed inside the cylindrical body with the substantially normal direction of the opening surface as an optical axis. .

  According to the first aspect of the present invention, the panel attached to the opening surface from which light is emitted is supported by the panel support block made of a cylindrical body whose axis is the normal direction of the opening surface. Even if a load is applied to a person or a fixture, it will not be damaged, and the translucent cylindrical body will not be an obstacle to the light in the housing regardless of the arrangement of the light source, so that uniform surface brightness can be obtained Can do.

  According to the invention of claim 2, since the light from the light source reaches the panel without passing through other members, the light emission efficiency is not impaired.

(First embodiment)
A surface-emitting luminaire according to a first embodiment of the present invention will be described with reference to FIGS. Fig.1 (a) (b) shows the structure of the surface emitting lighting fixture 1 of this embodiment. The surface-emitting luminaire 1 includes a box-shaped housing 2 having an opening surface 21 for light emission on the upper surface, a translucent panel 3 attached to the opening surface 21, and a light source accommodated in the housing 2. 4 and a panel support block 5 that is accommodated in the internal space of the housing 2 and supports the panel 3. The panel support block 5 is composed of a plurality of translucent cylindrical bodies 51 whose axes are substantially in the normal direction of the opening surface 21 of the housing 2. The plurality of cylindrical bodies 51 are provided adjacent to each other in a planar shape. The light source 4 is housed inside the cylindrical body 51 with the substantially normal direction of the opening surface 21 as the optical axis.

  The housing 2 is made of resin, wood, metal, or the like, and the inner surface of the housing 2 is lined with a highly reflective diffuse reflector so that the light irradiated from the light source 4 is not attenuated. This diffuse reflector is, for example, formed by shaping aluminum or a steel plate into a predetermined shape, degreased, washed, and dried, and then baked a white powder paint on the inner surface with a coating thickness of 60 microns. The white powder coating is obtained by dispersing high-purity titanium oxide produced by a chlorine method in a polyester resin or an epoxy polyester resin. The diffuse reflector is a highly reflective white film or sheet such as a white highly reflective polyester film (made by Toray, trade name “Lumirror”) or an ultrafine foamed light reflector (made by Furukawa Electric, trade name “MCPET”). It may be shaped into a predetermined shape. Regarding the reflection characteristics of these diffuse reflectors, the regular reflectance is almost 0%, the total reflectance is 95 to 99%, and 99% or more of the reflection is a diffuse reflection component.

  The panel 3 is configured by a transparent plate such as polycarbonate, acrylic, or tempered glass plate having translucency. The panel 3 may be a milky plate to which a light diffusing material is added, or a matte plate with irregularities formed by shot blasting on the surface, instead of the transparent plate. Moreover, you may improve the designability by printing an arbitrary picture on the panel 3 according to a user's liking.

The panel support block 5 is a honeycomb structure in which a plurality of cylindrical bodies 51 having a polygonal cross section are provided adjacent to each other in a planar shape, and the upper end thereof is in contact with the lower surface of the panel 3 to support the panel 3. . The plate thickness of the cylindrical body 51 is preferably 2 mm to 5 mm in consideration of moldability, load bearing strength and light transmission. The cylindrical body 51 is manufactured by extruding a translucent material such as acrylic or polycarbonate, or by bonding a resin sheet made of acrylic resin or polycarbonate resin. Since it is desirable that light from the light source 4 is uniformly scattered in the housing 2 and emitted from the panel 3, a light diffusing agent is added to the acrylic resin or polycarbonate resin forming the cylindrical body 51. Is desirable. Examples of the light diffusing agent include titanium oxide (TiO ₂ ), barium sulfate (BaSO ₄ ), calcium carbonate (CaCO ₃ ), benzogamine resin particles, silicon resin particles, and the like. Of these, a light diffusing agent is particularly obtained by adding about 0.5 to 2.0% of true spherical silicon resin particles having an average particle size of 2 microns because of excellent visible light diffusibility, no light absorption and good transmittance. As desirable.

  2 and 3 are enlarged views of parts of different types of panel support blocks 5, respectively. The cylindrical body 51 accommodates the light source 4 on the bottom surface of the hollow cylinder. The light source 4 is, for example, a white LED, an EL light source, a flat fluorescent lamp, or the like. The optical axis 41 of the light source 4 is set to a substantially normal direction of the opening surface 21 of the housing 2 from the light source 4 toward the panel 3. In the example of FIG. 2, a polygonal pyramid having apexes on the lower side composed of a plurality of slopes 52 extending upward is formed inside the cylindrical body 51, and one light source 4 is arranged on the lower apex thereof. ing. The outside of the polygonal pyramid may be solid or hollow. The slope 52 may be a curved surface. In the example shown in FIG. 3, the cylindrical body 51 has an inner side surface 53 of a hollow cylinder formed in a substantially vertical plane, and a plurality of light sources 4 are arranged on the bottom surface portion of the hollow cylinder.

  4 (a) and 4 (b) show cross-sectional configurations in the case where the cylindrical body 51 shown in FIG. 2 is solid and hollow, respectively. As shown in FIG. 4A, the reflecting plate 6 is provided on the slope 52 of the cylindrical body 51. When the light from the light source 4 is completely reflected, the reflecting plate 6 is made of a bright metal having a thickness of 20 nm or less because the light does not spread into the housing 2 and the surface brightness of the top surface of the panel 3 becomes uneven. Half mirror material is used. The half mirror material is formed on the inclined surface 52 of the cylindrical body 51 by vapor deposition or sputtering. Moreover, as shown in FIG.4 (b), the reflecting plate 7 which formed the half mirror material into a film by shape | molding a transparent acrylic resin or polycarbonate resin etc. in the hollow cylinder of the cylindrical body 51 is provided. In addition, the cylindrical body 51 shown in FIG. 3 makes the reflecting plate 7 unnecessary by arranging the plurality of light sources 4 on the bottom surface at substantially equal density.

  Next, the usage state of the surface-emitting light fixture 1 configured as described above will be described. FIG. 5 shows an arrangement example of the surface-emitting lighting device 1 in use. The surface emitting lighting device 1 is disposed on the floor 12 of the living room. In this living room, the window 14 provided on the wall 13 is shielded by a shutter or the like to reduce the illuminance as a whole (illustrated by a dot pattern). Is done. A fixture 11 is mounted on the surface-emitting light fixture 1, and a person may get on it. The load of the fixture 11 or the like is applied to the panel 3 on the top surface, and the panel 3 is supported from the bottom surface of the housing 2 by the panel support block 5. For this reason, the panel 3 can endure the load of the person or the fixture 11. Further, since the panel support block 5 is provided with a plurality of cylindrical bodies 51 adjacent to each other in a planar shape to form a block-like structure, the panel support block 5 is further stronger than the discrete arrangement of the cylindrical bodies 51. Improved and structurally supports the panel 3. For this reason, the surface-emitting light fixture 1 is not damaged even if a load such as a person or the fixture 11 is applied to the panel 3.

  Further, since the cylindrical body 51 has translucency, light from the light source 4 spreads into the housing 2 without being blocked by the cylindrical body 51 and is emitted from the top surface of the panel 3. . For this reason, uniform surface luminance can be obtained regardless of the arrangement of the light sources 4. For example, when a surface light source source such as an organic EL is used as an array as the light source 4, there is no joint between the surface light source sources, and when a plurality of LEDs are used as the light source 4, the brightness of the LED chip varies. Even if there is, there will be no uneven brightness. Further, since the light source 4 is housed inside the cylindrical body 51 with the substantially normal direction of the opening surface 21 of the housing 2 as the optical axis, the panel without the light from the light source 4 being transmitted through other members. 3, the loss associated with the permeation of the member is prevented, and the luminous efficiency is not impaired.

(Second Embodiment)
A surface-emitting luminaire according to a second embodiment of the present invention will be described with reference to FIGS. In the following description, detailed description of portions equivalent to those of the first embodiment is omitted. FIG. 6 shows a configuration of the surface emitting lighting device 1 of the present embodiment. The surface-emitting illuminating device 1 of the present embodiment has a structure in which a plurality of rectangular hollow cylindrical bodies 54 are arranged in a planar shape as the panel support block 5 instead of the honeycomb structure in the first embodiment. Used. The light source 4 is accommodated inside the cylindrical body 54.

  7 and 8 are enlarged views of parts of different types of panel support blocks 5, respectively. A rectangular EL light source is used as the light source 4. In the example of FIG. 7, the panel support block 5 is configured by arranging a plurality of cylindrical bodies 54 in a lattice shape. In the example shown in FIG. 8, the panel support block 5 is configured by arranging a plurality of cylindrical bodies 54 in a staggered pattern. The light sources 4 may be arranged in a staggered pattern on the panel support block 5 configured by arranging the cylindrical bodies 54 in a grid pattern. Since the cylindrical body 54 of the light source 4 has translucency, even if the light sources 4 are arranged in a staggered pattern, the surface luminance is uniform.

  According to the surface emitting lighting device 1 according to the present embodiment, the panel support block 5 is configured by the rectangular hollow tubular body 54, so that the manufacturing is easier than the honeycomb structure and the manufacturing cost is reduced. Can do. Further, by arranging the light sources 4 in a staggered pattern, the manufacturing cost can be further reduced as compared with the case where the light sources 4 are arranged in a grid pattern.

  In addition, this invention is not restricted to the structure of said embodiment, A various deformation | transformation is possible in the range which does not change the summary of invention. For example, the surface emitting lighting device 1 is not limited to the use of the floor lighting device, and may be used as a partition or a door.

(A) is an external view of the surface emitting lighting fixture which concerns on the 1st Embodiment of this invention, (b) is a disassembled perspective view of the fixture. The perspective view of an example of the cylindrical body in the instrument. The perspective view of another example of the cylindrical body in the instrument. (A) is sectional drawing of the cylindrical body in the instrument, (b) is sectional drawing of the modification of the cylindrical body. The figure which shows the example of the use condition of the instrument. The disassembled perspective view of the surface emitting lighting fixture which concerns on the 2nd Embodiment of this invention. The perspective view of an example of the cylindrical body in the instrument. The perspective view of another example of the cylindrical body in the instrument. The figure which shows the example of illumination by a surface emitting lighting fixture.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surface emitting lighting fixture 2 Housing | casing 21 Opening surface 3 Panel 4 Light source 41 Optical axis 5 Panel support blocks 51 and 54 Cylindrical body

Claims (2)

A surface-emitting luminaire comprising a housing having an opening surface for light emission, a translucent panel attached to the opening surface, and a light source accommodated in the housing,
A panel support block disposed in the internal space of the housing and supporting the panel;
The panel support block is composed of a plurality of translucent cylindrical bodies whose axes are substantially in the normal direction of the opening surface, and the plurality of cylindrical bodies are provided adjacent to each other in a planar shape. A surface-emitting luminaire characterized by.   2. The surface-emitting lighting device according to claim 1, wherein the light source is housed in the cylindrical body with a substantially normal direction of the opening surface as an optical axis.

Images