JP5760193B2 - Lighting device - Google Patents

Description

    The present invention relates to a lighting device using an EL element.

  In an electroluminescence (EL) element, a light emitting part in which a light emitting layer is sandwiched between an anode and a cathode is formed on a transparent substrate, and when a voltage is applied between the electrodes, electrons injected as carriers into the light emitting layer Then, light is emitted by excitons generated by the recombination of holes.

  EL elements are roughly classified into an organic EL element using an organic substance as a fluorescent material of a light emitting layer and an inorganic EL element using an inorganic substance. In particular, the organic EL element has characteristics that it can emit light with high luminance at a low voltage, can obtain various emission colors depending on the type of fluorescent material, and can be easily manufactured as a flat light emitter.

  For example, a lighting device in which a sub-panel having the same shape as that of a rectangular organic EL panel is rotatably connected to each side of a rectangular organic EL panel is known as one utilizing the characteristics of the EL element as a planar light emitter (for example, , See Patent Document 1). This lighting device can be transformed into a desired form such as a flat type or a box type by rotating the sub-panel. Moreover, the illuminating device which connected the tile-type flat panel mutually with the hinge-type connector is known (for example, refer patent document 2). According to this illuminating device, the range in which light is irradiated can be appropriately adjusted by changing the connection shape of a plurality of panels or appropriately lighting them.

JP 2008-186599 A JP 2005-536708 A

  However, the illumination devices described in Patent Document 1 and Cited Document 2 can change the light irradiation range by changing the connection shape of a plurality of panels, but each panel emits light individually, The light emission luminance cannot be switched depending on the use of the lighting device.

  The present invention solves the above-described problems, and an object of the present invention is to provide an illumination device that allows a user to switch the light emission luminance appropriately according to the use of the illumination device.

  In order to solve the above-mentioned problems, the present invention provides a plurality of transparent EL elements comprising a transparent EL element formed by sequentially laminating an anode made of a transparent conductive film, a light emitting layer, and a cathode made of a transparent conductive film on a light-transmitting substrate. An EL panel and an instrument body that holds the transparent EL panel so that the light emission areas of the plurality of transparent EL panels overlap each other, and the light emitted from the plurality of transparent EL panels is irradiated with light. Features.

  In the illuminating device, the plurality of transparent EL panels are preferably configured to be detachable from each other, and when overlapped, it is preferable to irradiate light obtained by superposing light emitted from the transparent EL panels.

  In the illuminating device, it is preferable that the transparent EL panel has an anode and a cathode terminal on one surface and a terminal receiving portion corresponding to the anode and the cathode terminal on the other surface.

  In the illumination device, it is preferable that the appliance main body includes a housing that accommodates the plurality of transparent EL panels.

  In the lighting device, it is preferable that a pressing member is fitted into a groove provided on the inner surface of the casing, and the pressing member holds the transparent EL panel with the groove.

  In the illuminating device, it is preferable that a part of the instrument main body facing the transparent EL panel has light reflectivity.

  The lighting device preferably further includes an EL panel having a light reflection layer, and the EL panel having the light reflection layer is disposed on the outermost part of the plurality of the transparent EL panels stacked.

  In the illumination device, it is preferable that the plurality of transparent EL panels are connected so as to be foldable and overlap each other to emit light obtained by superposing light emitted from the transparent EL panels.

  In the illuminating device, the plurality of transparent EL panels are preferably rotatably held with respect to the instrument main body and, when overlapped, emit light that is obtained by superposing light emitted from the transparent EL panels. .

  In the above illumination device, it is preferable that the plurality of transparent EL panels are configured to be slidable with each other, and emit light that is obtained by superposing light emitted from the transparent EL panels when they are overlaid.

  In the illumination device, it is preferable that the instrument body includes a plurality of slide grooves arranged in parallel in a direction orthogonal to the slide direction of the transparent EL panel.

  In the lighting device, it is preferable that the transparent EL panel is disposed in a window portion of the slide door.

  In the lighting device, it is preferable that a sliding door is constituted by the transparent EL panel.

  The illumination device preferably includes a control unit that individually controls lighting of the plurality of transparent EL panels.

  In the illumination device, it is preferable that the plurality of transparent EL panels have different emission colors.

  In the illumination device, it is preferable that the light emission colors of the plurality of transparent EL panels include RGB three primary colors.

  In the illumination device, the plurality of transparent EL panels preferably have different light emitting surface areas.

  According to the illumination device of the present invention, the emission luminance can be appropriately switched by changing the number of transparent EL panels to be overlaid.

The disassembled perspective view of the illuminating device which concerns on the 1st Embodiment of this invention. (A) (b) is a sectional side view of the illumination device. The sectional side view which shows schematic structure of the EL element used for the illuminating device. (A) and (b) are exploded perspective views showing other composition of the lighting device. The sectional side view which shows the other structure of the same illuminating device. The disassembled perspective view which shows the other structure of the same illuminating device. The sectional side view which shows the other structure of the illuminating device. (A) is a disassembled perspective view which shows the other structure of the illuminating device, (b) is the same sectional side view. The disassembled perspective view which shows the other structure of the same illuminating device. The sectional side view which shows the other structure of the same illuminating device. (A) and (b) are exploded perspective views showing other composition of the lighting device. The disassembled perspective view which shows the other structure of the same illuminating device. (A) and (b) are exploded perspective views showing other composition of the lighting device. (A) (c) is a perspective view of the illuminating device based on the 2nd Embodiment of this invention, (b) (d) (e) (f) is the same side view. (A) (b) is a perspective view which shows the other structure of the same illuminating device. (A) (b) is a perspective view which shows the other structure of the same illuminating device. (A) (b) is a perspective view which shows the other structure of the same illuminating device. (A) (b) is a perspective view which shows the other structure of the same illuminating device. (A) (b) is a perspective view which shows the other structure of the same illuminating device. (A) (b) is a perspective view which shows the other structure of the same illuminating device. (A) (b) is a perspective view which shows the other structure of the same illuminating device. (A) (b) is a side view which shows the other structure of the illuminating device, (c) is the perspective view. (A) (b) is a perspective view which shows the other structure of the same illuminating device. (A) and (b) are the perspective views of the illuminating device which concerns on the 3rd Embodiment of this invention. The perspective view which shows the other structure of the illumination device. (A) and (b) are perspective views of the illuminating device which concerns on the 4th Embodiment of this invention. (A) (b) is a perspective view which shows the other structure of the same illuminating device. (A) (b) is a perspective view which shows the other structure of the same illuminating device.

  A lighting device according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. Here, the lighting device 1 of the present embodiment will be described based on a configuration used as an embedded downlight embedded in the ceiling C. Further, the downward direction of the drawing is the light extraction direction. As shown in FIGS. 1 and 2A and 2B, the lighting device 1 holds the EL panel 2 so that the plurality of transparent EL panels 2 and the light emission areas of the plurality of EL panels 2 overlap each other. An instrument body 3 to be provided. Each EL panel 2 has the same shape and is configured to be detachable from each other.

  The EL panel 2 is configured as a single module in which a transparent EL element 20 formed in a disk shape is incorporated in an annular panel frame 21. Since the EL element 20 is transparent as will be described later, the EL panel 2 emits light and emits light in a state in which a plurality of elements are overlapped, and is emitted from other EL panels 2. Transmits light. Therefore, when the illuminating device 1 is used as a downlight, the EL panel 2 superimposed on the lower stage emits light obtained by superimposing the light of the upper EL panel 2.

  The panel frame 21 is provided with anode terminals 22a and cathode terminals 22b on one surface, and terminal receiving portions 23a and 23b corresponding to the anode terminals 22a and cathode terminals 22b on the other surface, respectively. The terminals 22a and 22b are formed in a convex shape, the terminal receiving portions 23a and 23b are formed in a concave shape, and the terminals 22a and 22b are fitted into the terminal receiving portions 23a and 23b, whereby the EL panels 2 are electrically connected to each other. Connected. The anode terminal 22a and the cathode terminal 22b are formed in different shapes, and the cathode terminal 22b is an anode terminal so that the anode terminal 22a is not fitted into the cathode terminal receiving portion 23b. It is comprised so that it may not fit in the receiving part 23a. In the illustrated example, the anode terminal 22a is formed in a cylindrical shape, the cathode terminal 22b is formed in a slightly elongated tablet shape, and the terminal receiving portions 23a and 23b are also formed in shapes corresponding thereto. In this way, it is possible to prevent the user from connecting each terminal by mistake when stacking a plurality of EL panels 2. The panel frame 21 is provided with a through hole 24 so as to avoid the position of the light emitting portion (details will be described later) of the EL element 20, and the EL panel 2 is attached by a screw 31 inserted through the through hole 24. It is held by the instrument body 3.

  The instrument body 3 has a cylindrical housing 32 for housing a plurality of transparent EL panels, a base portion 33 with which the EL panel 2 abuts in two housing spaces in the housing 32, and a ceiling C. Part 34. The plurality of EL panels 2 are accommodated in one space in the housing 32 divided by the base 33, and in the other space, a lighting circuit for controlling the lighting of the EL panel 2 and a control microcomputer (control unit) ) Etc. are housed. The base 33 is firmly fixed to the inner peripheral surface of the housing 32 by adhesion or welding. The power supply unit 4 is connected to a commercial power supply (not shown) by a conducting wire 41. The appliance main body 3 is provided with an appliance fixing member (not shown) on the outer surface side of the housing 32. The appliance fixing member and the flange 34 sandwich the plate material constituting the ceiling C, whereby the appliance main body 3 is attached to the ceiling. C is fixed. In addition, a plurality of radiating fins (not shown) may be provided on the outer surface of the housing 32 in order to improve heat dissipation.

  The base portion 33 is provided with main body terminal receiving portions 33a and 33b having the same shape as the terminal receiving portions 23a and 23b of the EL panel 2, and the main body terminal receiving portions 33a and 33b are provided with circuit wiring (not shown). ) To the power supply unit 4. In addition, the anode terminal 22a and the cathode terminal 22b of the EL panel 2 are fitted into the body terminal receiving portions 33a and 33b, respectively, so that the power supply unit 4 and the EL panel 2 are electrically connected. Further, the base 33 is provided with a screw fixing hole 33c through which the screw 31 is inserted in order to fix the EL panel 2 to the instrument body 3. In the configuration in which the EL panel 2 is fixed to the instrument body 3 with the screws 31 as in this example, when the number of EL panels 2 used is small, the screws 31 may protrude greatly above the base portion 33. is there. Therefore, it is desirable that the power supply unit 4 and the conductive wire 41 are arranged on the upper surface side of the base portion 33 so as to avoid the position where the screw fixing hole 33c is formed.

As shown in FIG. 3, the EL element 20 has a configuration in which a light-emitting portion 26 is formed on a light-transmitting substrate 25 and the outside thereof is covered with a sealing material 27. The light emitting unit 26 is formed by sequentially laminating an anode 26 a made of a transparent conductive film, a light emitting layer 26 b having a light emitting function, and a cathode 26 c made of a transparent conductive film on a substrate 25. The transparent conductive film forming the anode 26a and the cathode 26c is made of a light-transmitting conductive material such as ITO (indium tin oxide), SnO ₂ (tin oxide), ZnO (zinc oxide). The sealing material 27 is made of a transparent material, and is covered so that a part of each electrode is exposed. The exposed portion of these electrodes is electrically connected to the anode terminal 22a or the cathode terminal 22b directly or via a lead wire or the like. Connected.

  The substrate 25 is made of translucent glass such as soda lime glass or non-alkali glass, or translucent resin material, and is formed in a disc shape.

The anode 26a is an electrode for injecting holes into the light emitting layer 26b, and an electrode material made of a metal, an alloy, a conductive compound or a mixture thereof having a high work function is used, and preferably the work function is 4 eV or more. Things are used. In particular, a light-transmitting conductive material such as ITO, SnO ₂ (tin oxide), or ZnO (zinc oxide) is preferable. The anode 26a is formed by depositing and patterning these electrode materials on the surface of the substrate 25 by a method such as a vacuum deposition method or a sputtering method.

  For the light emitting layer 26b, an organic fluorescent material capable of emitting desired white light is used. For example, anthracene, naphthalene, pyrene, tetracene, coronene, perylene, phthaloperylene, naphthaloperylene, diphenylbutadiene, tetraphenylbutadiene, coumarin, oxadiazole Bisbenzoxazoline, bisstyryl, cyclopentadiene, quinoline metal complex, tris (8-hydroxyquinolinato) aluminum complex, tris (4-methyl-8-quinolinato) aluminum complex, tris (5-phenyl-8-quinolinato) Aluminum complex, aminoquinoline metal complex, benzoquinoline metal complex, tri- (p-terphenyl-4-yl) amine, 1-aryl-2,5-di (2-thienyl) pyrrole derivative, pyran, quinacridone, rubu Emissions, distyrylbenzene derivatives, di still arylene derivatives, and compounds having a group consisting of these luminescent compound in a part of the molecular structure, the polymer material, mixed material of various fluorescent dyes are used.

  The light emitting layer 26b is formed by forming and patterning the above-described compound on the surface of the anode 26a by, for example, a vacuum deposition method. The light emitting layer 26b may be a laminate of a plurality of different materials, and a buffer layer for adjusting the potential may be interposed between the plurality of layers.

The cathode 26c is an electrode for injecting electrons into the light emitting layer 26b, and is formed of a light-transmitting conductive material such as ITO, SnO ₂ , or ZnO, similarly to the anode 26a. The cathode 26c is also formed by the same method as the anode 26a. A hole injection / transport layer (not shown) that promotes the hole injection effect from the anode 26a to the light emitting layer 26b may be provided between the anode 26a and the light emitting layer 26b. In addition, an electron injection / transport layer (not shown) that promotes an electron injection effect from the cathode 26c to the light emitting layer 26b is preferably provided between the light emitting layer 26b and the cathode 26c.

  In the EL element 20 configured as described above, light is emitted by supplying predetermined power to the anode 26a and the cathode 26c via the terminals 22a and 22b (see FIGS. 1 and 2) of the panel frame 21. The layer 26b emits light. The emitted light passes through the anode 26a and the cathode 26c and is taken out of the EL element 20. Note that a diffusion layer (not shown) or the like for increasing the light extraction efficiency from the substrate 25 may be provided on the upper surface of the EL element 20 so as not to impair the transparency.

  According to the illuminating device 1 of this embodiment, since the some EL panel 2 is detachable with respect to the instrument main body 3, the number of the EL panels 2 piled up can be changed easily. When the light emission luminance of the lighting device 1 is increased, the number of superimposed EL panels 2 is increased, and when the light emission luminance is decreased, the number of superimposed EL panels 2 is decreased. In this way, the user can appropriately switch the light emission luminance of the lighting device 1 according to the application of the lighting device 1. In addition, since the EL panels 2 are modularized in the same shape, the number of model numbers can be reduced for the manufacturer, and the manufacturing efficiency can be improved. Moreover, since it is not necessary for the user to search for a model with a model that matches the instrument body, the product can be purchased without trouble.

  Of the base portion 33, the portion facing the EL panel 2 is preferably configured to have light reflectivity by applying a white paint or forming a reflective film or the like. By so doing, the light emitted from the EL panel 2 toward the base 33 is reflected by the surface of the base 33 and travels in the light derivation direction, so that the light use efficiency can be improved.

  In addition, a reflective EL panel (not shown) formed in the same shape as the EL panel 2 and configured to have light reflectivity by using a light reflective material such as aluminum for the cathode 26c was superposed. You may arrange | position separately in the outermost part of the some EL panel 2. FIG. In this example, a light reflective EL panel is disposed at a position where it abuts on the base 33. In this way, as described above, the light emitted toward the base 33 is reflected and travels in the light derivation direction, so that the light utilization efficiency can be improved.

  Also, each terminal 22a, 22b and terminal receiving portion 23a, 23b is provided with a plurality of electric circuits, and a plurality of superimposed EL panels 2 are independently connected to the control unit of the power supply unit 4 to each EL panel. It is preferable that 2 are individually controlled to be lit. In this way, by changing the number of EL panels 2 to be lit among the stacked EL panels 2, the emission luminance can be arbitrarily switched without removing the EL panels 2. Further, for example, when the emission luminance is decreased, the lower EL panel 2 is turned on. That is, light emitted from the upper EL panel 2 is slightly lost due to total reflection or the like when passing through the lower EL panel 2. Therefore, by preferentially turning on the lower EL panel 2, light loss due to transmission through the other EL panel 2 can be suppressed, and light utilization (light extraction) efficiency can be improved.

  In addition, the plurality of EL panels 2 may be configured to have different emission colors. In this case, for example, the light emission colors of the plurality of EL panels 2 are configured to include RGB three primary colors. In this configuration, by adjusting the output of each EL panel 2, full-color illumination including white light is possible. For example, the color rendering property of irradiation light is changed according to the situation of the space in which the illumination device 1 is used. Such lighting effects can be performed.

  Next, regarding other configurations of the lighting device 1 of the present embodiment, in particular, the holding structure of the EL panel 2, the shapes of the EL panel 2 and the instrument main body 3, and forms other than the above-described embedded downlight, etc. This will be described with reference to FIGS.

  4A and 4B show a configuration in which a holding frame for holding the EL panel 2 in the housing 32 is provided. The configuration shown in FIG. 4A includes an annular holding frame 51 formed in the same shape as the flange portion 34 of the instrument body 3. Screw holes 34a and 51a are formed in both the flange portion 34 and the holding frame 51, and the screw portion 34 and the holding frame 51 are joined by inserting the screw 31 into the screw holes 34a and 51a. An annular interval adjusting member 52 having elasticity and formed in substantially the same shape as the panel frame 21 of the EL panel 2 is disposed in the housing 32. That is, the EL panel 2 is held in the instrument main body 3 by being pressed by the space adjusting member 52 having elasticity in a space between the base 33 and the holding frame 51.

  In addition, the configuration shown in FIG. 4B includes a cylindrical portion 53a having an inner diameter slightly larger than the outer diameter of the EL panel 2, and an edge portion 53b in which an opening having substantially the same shape as the EL element 20 is formed. A frame 53 is provided. A screw groove is formed on the inner peripheral surface of the housing 32, and a screw groove is also formed on the outer peripheral surface of the cylindrical portion 53a so as to correspond to the screw groove. Then, the holding frame 53 is fixed to the instrument main body 3 by screwing the cylindrical portion 53 a into the housing 32. As a result, the EL panel 2 is held in the instrument main body 3 in a space sandwiched between the base portion 33 and the edge portion 53b. Similar to the configuration shown in FIG. 4A, the interval adjusting member 52 may be appropriately arranged. Further, instead of the holding frame 53, an annular spring (not shown) having a slightly larger circumferential diameter than the circumferential diameter of the thread groove is fitted into a thread groove formed on the inner circumferential surface of the housing 32, and the annular spring is fitted. The EL panel 2 may be held.

  In FIG. 5, a plurality of groove portions 35 having the same width as the thickness of the EL panel 2 are formed on the inner peripheral surface of the housing 32, and a part of a spring piece 54 is fitted into the groove portion 35 as a pressing member. A configuration in which the EL panel 2 is held by the piece 54 is shown. The spring piece 54 is formed so that a portion protruding from the groove 35 is urged toward the base 33 in a state where the spring piece 54 is fitted into the groove 35. The biased spring piece 54 supports the lower surface side of the panel frame 21 of the EL panel 2, so that the EL panel 2 is held in the housing 32 at a position where the spring piece 54 is fitted. In this configuration, it is desirable that a spring receiving portion (not shown) is formed on the panel frame 21. In the configuration described above, the EL panel 2 has a disk shape and the casing 32 has a cylindrical shape. However, as shown in FIG. 6, the EL panel 2 has a rectangular shape and the casing 32 has a box shape. It may be a shape. In this case, the structure shown in FIG. 4A and FIG. 5 can be used as a structure for holding each EL panel 2.

  Moreover, the illuminating device 1 of this embodiment is not limited to the above-described ceiling-embedded downlight, and can be used as, for example, an embedded luminaire embedded in the floor F as shown in FIG. In this structure, each EL panel 2 is positioned by each terminal 22a, 22b and each terminal receiving part 23a, 23b, 33a, 33b, and is hold | maintained at the instrument main body 3 with dead weight, Therefore A separate holding structure is not required. . The embedded lighting device 1 is installed so that the collar portion 34 is embedded in the floor surface F and does not protrude on the floor surface F. A protective cover 36 for protecting the EL panel 2 is attached to the collar portion 34.

  8A and 8B show a configuration in which the lighting device 1 is used as a ceiling light. In this configuration, the instrument body 3 is directly fixed to the ceiling C by the screws 31. Further, on the lower surfaces of the instrument body 3 and the panel frame 21 of the EL panel 2, Dalma hole-shaped terminal receiving portions 23 a, 23 b, 32 a, and 32 b are formed by combining circular holes and long holes. On the other hand, on the lower surfaces of the instrument body 3 and the panel frame 21 of the EL panel 2, screw-head shaped terminals 22a and 22b are formed. Then, after passing the terminals 22a and 22b through the circular hole portions of the terminal receiving portions 23a, 23b, 32a and 32b, the EL panel 2 to be attached is slightly rotated. As a result, the screw-head shaped terminals 22a and 22b engage with the elongated hole portions of the terminal receiving portions 23a, 23b, 32a, and 32b, and the instrument body 3 and the EL panel 2, or the EL panels 2 are fixed. . According to this configuration, the EL panel 2 can be attached to the instrument body 3 without using a separate holding member, and the lower EL panel 2 can be directly attached to the upper EL panel 2. In addition, it is desirable to attach the EL panel 2a in which the terminal receiving portions 23a and 23b are not provided in the lowest stage among the EL panels 2 to be superimposed.

  Also, in the ceiling light, a rectangular EL panel 2 can be used as shown in FIG. In this case, a hook member 55 may be provided on the side portion of the instrument body 3 and the EL panel 2 may be held by the hook member 55. Further, as shown in the figure, the EL panel 2 may be held by locking the square frame 56 to the hook member 55 and sandwiching the EL panel 2 by the square frame 56 and the instrument body 3. .

  In FIG. 10, the instrument main body 3 is fixed to the ceiling C through the bottom surface of the enclosure frame 57, and the EL panel 2 is held in the enclosure frame 57. As the specific holding structure, any of those described above is used. Also in this case, as shown in FIGS. 11A and 11B, either a circular or rectangular EL panel 2 may be used.

  Further, the plurality of EL panels 2 may have different light emitting surface areas. In this case, as shown in FIG. 12, it is desirable that the EL panel 2 having a large light emitting surface is attached to the upper stage, and the EL panels 2 having smaller light emitting areas are sequentially attached to the lower stage. In this configuration, electrical connection between the instrument body 3 and each EL panel 2 is made by, for example, a lead wire.

  FIGS. 13A and 13B show a configuration in which the lighting device 1 is used as a spotlight. In this configuration, the instrument body 3 is fixed to the ceiling C via the support shaft 58, and a hinge portion 61 is provided between the instrument body 3 and the support shaft 58 so that the instrument body 3 can swing freely. ing. Also in this configuration, the EL panel 2 to be superimposed may be a circle shown in FIG. 13A or a rectangle shown in FIG. Each EL panel 2 may be housed inside the housing 32 of the instrument body 3 or laminated outside the housing 32.

  Next, an illuminating device according to a second embodiment of the present invention will be described with reference to FIGS. The illuminating device 1 of this embodiment irradiates the light which superposed | stacked the emitted light of each EL panel 2 when the several EL panel 2 is connected so that folding is possible and it piled up.

  14A to 14F show a configuration in which the lighting device 1 is used as a ceiling light attached to the ceiling C. FIG. In this lighting device 1, a pair of support members 63 are joined to a pedestal portion 37 (apparatus body 3) fixed to a ceiling C via a cylindrical bearing portion 62, and the EL panel 2 is attached to each support member 63. It is fixed. The bearing portion 62 includes a bending shaft (not shown) so that the pair of support members 63 and the EL panel 2 can be bent in a range of 0 to 180 °. In the support member 63, a panel insertion groove 64 is formed on the side surface opposite to the joint portion with the bearing portion 62. The pedestal portion 37 or the bearing portion 62 includes a power supply unit (not shown), and is electrically connected to a terminal receiving portion (not shown) formed inside the panel insertion groove of the support member 63 by a lead wire or the like. ing. In addition, an electrode terminal (not shown) is provided on a side portion of the EL panel 2, and the EL panel 2 is inserted into the panel insertion groove 64, whereby the EL panel 2 is fixed to the support member 63 and is electrically connected to the power supply unit. Connected. Further, this configuration can also be used as a hanging ceiling light by a support shaft 58 as shown in FIGS. In this case, the lighting device 1 is fixed to the ceiling C via the support shaft 58 instead of the pedestal portion 37.

  In this embodiment, as shown in FIGS. 14 (a), 14 (b), and 15 (a), if each EL panel 2 is horizontally arranged, low-luminance light can be irradiated over a wide range. . Moreover, since the EL panel 2 emits light from both sides, it can irradiate light in both the ceiling C direction and the floor direction. As shown in FIGS. 14A, 14B, and 15B, if each EL panel 2 is arranged vertically, light with high luminance can be irradiated in a narrow range. Further, as shown in FIGS. 14E and 14F, the bending angle of each EL panel 2 is arbitrary. By changing the bending angle, the user can arbitrarily change the light irradiation range and the luminance. it can.

  16 to 18 show a configuration in which the lighting device 1 is used as a standlight. 16 (a) and 16 (b), a support arm 59 bent in an L-shape is erected so as to be rotatable with respect to the instrument main body 3, and a pair of EL is provided on the upper side of the support arm 59 via a hinge portion 61. The structure to which the panel 2 was attached is shown. 17 (a) and 17 (b), one side of the rectangular EL panel 2 is attached to the instrument body 3 so that the angle is variable, and the other side is connected to another EL panel 2 via the hinge portion 61. Shows the configuration. As shown in FIGS. 18A and 18B, the connected EL panels 2 may have different shapes. According to this configuration, as shown in FIGS. 16 (a), 17 (a), and 18 (a), when the bending angle of each EL panel 2 is set to 180 °, low-luminance light is emitted over a wide range. Can be irradiated. Further, as shown in FIGS. 16B, 17B, and 18B, when the EL panels 2 are overlapped, high-intensity light can be irradiated in a narrow range. Note that the white arrows in FIGS. 16A and 16B indicate changes in the luminance of the irradiation light from the EL panel 2 as an image.

  19 to 23 show a configuration in which the lighting device 1 has two or more bent portions. FIGS. 19 and 20 are the same as the ceiling lights shown in FIGS. 14 and 15, and have a configuration in which two EL panels 2 are attached to the instrument body 3 via hinges 61, respectively. Show. FIGS. 19A and 19B show a configuration in which the instrument body 3 is fixed to the ceiling C, and FIGS. 20A and 20B show a suspension type configuration with the support shaft 58. In the configuration shown in FIGS. 20 (a) and 20 (b), since the instrument body 3 and the ceiling are separated from each other, the hinge portion 61 is desirably provided on the side portion of the instrument body 3 as illustrated. If it carries out like this, each EL panel 2 can be rotated in a wider range.

  21 (a) and 21 (b), a support shaft 58 is erected on the pedestal portion 37 (the instrument body 3) placed on the floor surface F, and an upper bottom portion 65 is disposed at the upper end of the support shaft 58. A configuration in which a pair of EL panels 2 are attached to the upper bottom portion 65 via hinges 61 is shown. According to this configuration, as shown in FIG. 21A, if the EL panel 2 is expanded, it can function as a table that also serves as illumination. In addition, as shown in FIG. 21B, if the EL panel 2 is folded, it can function as a message board.

  22A to 22C show a configuration in which the lighting device 1 is used as a floor stand light. In this illuminating device 1, a long support shaft 58 is erected on a pedestal portion 37 (apparatus body 3) on a floor surface F, and an EL panel 2 is horizontally disposed on the upper end of the support shaft 58. The EL panel 2 is provided on the opposite sides of the panel 2 via connection portions 66a and 66b, respectively. Each connection part 66a, 66b incorporates a hinge, and connects each EL panel 2 so that it can be bent. Further, since one connecting portion 66b is formed longer than the other connecting portion 66a by the thickness of the EL panel 2, the EL panel 2 connected by the connecting portion 66a is connected to the EL panel 2 as shown in FIG. After the folding, the EL panel 2 connected by the connecting portion 66b can be smoothly folded.

  FIGS. 23A and 23B show a configuration in which a plurality of EL panels 2 are connected via a plurality of hinge portions 61. Each EL panel 2 may have the same shape as shown in FIG. 23A, or may have different shapes as shown in FIG. In the illuminating device 1, similarly to the above-described configuration, the user can arbitrarily change the light irradiation range and the luminance by changing the bending angle of the hinge portion 61. Further, when folded as shown in the figure, it can be used as a “shining screen”.

  Next, an illumination device according to a third embodiment of the present invention will be described with reference to FIGS. In the illuminating device 1 of the present embodiment, the plurality of EL panels 2 are rotatably held with respect to the instrument main body 3 and emit light that is obtained by superposing light emitted from each EL panel 2 when they are superimposed. Is.

  24 (a) and 24 (b) show a configuration in which the lighting device 1 is used as a standlight. In this illuminating device 1, two support arms 59 bent in an L shape are erected so as to be rotatable with respect to the instrument body 3, and the EL panel 2 is attached to the tip of the bent portion of the support arm 59. It is a thing. The height of each support arm 59 differs depending on the thickness of the EL panel 2, and the length of the bent portion also differs depending on the standing position on the instrument body 3, as shown in FIG. The EL panel 2 is configured to be superposed on the other EL panel 2. FIG. 25 shows a configuration in which the illumination device 1 is used as chandelier illumination. In the example shown in the figure, three EL panels 2 are attached, but four or more EL panels 2 may be attached. According to this configuration, by rotating the EL panel 2 with respect to the instrument main body 3, the user can arbitrarily change the light irradiation range and the luminance as in the above-described embodiment.

  Next, a lighting device according to a fourth embodiment of the present invention will be described with reference to FIGS. The illuminating device 1 of this embodiment irradiates the light which superposed | stacked the emitted light of each EL panel 2, when the some EL panel 2 is comprised so that sliding is mutually possible and it piles up.

  FIGS. 26A and 26B show a configuration in which the lighting device 1 is used as a standlight. In this lighting device 1, the EL panel 2 is attached to the fixture body 3 through a hinge portion 61 so that the angle is variable, and a pair of slide rails 38 are provided on both sides of the EL panel 2. Another EL panel 2 is slidably held by the slide rail 38. According to this configuration, as shown in FIG. 26A, if the EL panel 2 that has become slidable is slid in the direction of the end of the slide rail, light with low luminance can be irradiated over a wide range. it can. In addition, as shown in FIG. 26B, when the EL panels 2 are overlapped, high-intensity light can be irradiated in a narrow range.

  FIGS. 27A and 27B show a configuration in which the lighting device 1 is used as a suspended ceiling light. The illuminating device 1 includes a plurality of slide grooves 39 arranged in parallel in a direction orthogonal to the slide direction of the EL panel 2 on the inner side surface of the fixture body 3. Since each EL panel 2 is held by the instrument body 3 at a different height by the thickness of the EL panel 2, by sliding the EL panel 2 along the slide groove 39, as shown in FIG. In addition, low-intensity light can be irradiated over a wide range. Further, as shown in FIG. 27B, when the EL panels 2 are overlapped, high-intensity light can be irradiated in a narrow range.

  FIG. 28A shows a configuration in which the EL panel 2 is disposed in the window portion of the slide door 7. A power supply line (not shown) is provided in the slide frame 71 that holds the slide door 7, and power is supplied from the power supply line to the EL panel 2. In this configuration, since the EL panel 2 transmits light, the EL panel 2 functions as a daylighting window when turned off, and functions as a lighting fixture when turned on. Further, by sliding the slide door 7 and superimposing the EL panel 2, it is possible to irradiate high-luminance light as in the above-described configuration. FIG. 28B shows an example in which the sliding door 81 of the storage furniture 8 is configured by the EL panel 2. Also in this configuration, similarly to the configuration described above, the user can change the light irradiation range and the luminance as appropriate by sliding the EL panel 2.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. The EL panel 2 has a relatively small diameter or one side dimension. For example, when the EL panel 2 is about 200 mm, the EL panel 2 is constituted by a flush light emitting unit 26 (see FIG. 3). However, in the case of a dimension larger than that, it is preferable to use a structure in which a plurality of light emitting portions 26 are arranged in a lattice shape so that light unevenness due to a voltage drop does not occur. In that case, it is more preferable that the wiring and the like are designed so that the plurality of light emitting units 26 can be individually controlled.

1 Lighting device 2 EL panel (transparent EL panel)
22a Anode terminal 22b Cathode terminal 23a (Anode positive) terminal receiving part 23b (for cathode) Terminal receiving part 3 Instrument body 32 Housing 33 Base (part facing the EL panel)
35 Groove part 39 Slide groove 4 Power supply unit (control part)
54 Spring piece (holding member)
7 Sliding door 81 Sliding door

Claims (17)

  A plurality of transparent EL panels composed of a transparent EL element formed by sequentially laminating an anode made of a transparent conductive film, a light emitting layer, and a cathode made of a transparent conductive film on a light-transmitting substrate; An illumination device that emits light obtained by superposing light emitted from a plurality of transparent EL panels.   The illumination device according to claim 1, wherein the plurality of transparent EL panels are configured to be detachable from each other, and irradiate light obtained by superposing light emitted from the transparent EL panels when they are superimposed. .   The lighting device according to claim 2, wherein the transparent EL panel is provided with an anode and a cathode terminal on one surface and a terminal receiving portion corresponding to the anode and the cathode terminal on the other surface. .   The lighting device according to claim 2, wherein the fixture main body includes a housing that accommodates the plurality of transparent EL panels.   The lighting device according to claim 4, wherein a pressing member is fitted into a groove provided on an inner surface of the casing, and the pressing member holds the transparent EL panel with the groove.   6. The illumination device according to claim 2, wherein a portion of the fixture main body facing the transparent EL panel has light reflectivity.   6. The EL panel according to claim 2, further comprising an EL panel having a light reflecting layer, wherein the EL panel having the light reflecting layer is disposed on the outermost part of the plurality of the transparent EL panels stacked. The illumination device according to any one of the above.   The lighting device according to claim 1, wherein the plurality of transparent EL panels are connected to each other so as to be foldable, and irradiate light obtained by superposing light emitted from the transparent EL panels when they are overlapped.   The plurality of transparent EL panels are rotatably held with respect to the instrument body, and emit light that is obtained by superposing light emitted from the transparent EL panels when they are superimposed. The lighting device described in 1.   The lighting device according to claim 1, wherein the plurality of transparent EL panels are configured to be slidable from each other and emit light obtained by superimposing light emitted from the transparent EL panels when they are superimposed.   The lighting device according to claim 10, wherein the fixture body includes a plurality of slide grooves arranged in parallel in a direction orthogonal to the slide direction of the transparent EL panel.   The lighting device according to claim 10 or 11, wherein the transparent EL panel is disposed in a window portion of a sliding door.   The lighting device according to claim 10 or 11, wherein a sliding door is constituted by the transparent EL panel.   The lighting device according to any one of claims 1 to 13, further comprising a control unit that controls lighting of the plurality of transparent EL panels individually.   The lighting device according to claim 1, wherein the plurality of transparent EL panels have different emission colors.   The illuminating device according to any one of claims 1 to 15, wherein the light emission colors of the plurality of transparent EL panels include RGB three primary colors.   The illumination device according to any one of claims 1 to 16, wherein the plurality of transparent EL panels have different light emitting surface areas.

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