JP2012199067A - Illumination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination device with little sense of incompatibility given in which the jointing part is not dark, even when a plurality of panels are combined to make light emission with a large area.SOLUTION: When light-emitting layers 11 emit light, almost all emitting light passes through a transparent anode layer 13 and a transparent plate 14 and emits light from a light-emitting surface 14a. At this time, the most intense light is emitted in a normal line direction of the light-emitting layer 11, thereby, light emitted from the light-emitting layer 11 near the end face 14b is emitted outside going through the spaces in the end face 14b on the right above, thereby, the jointing part (A) on the light-emitting surface 14a side can be made inconspicuous.

Description

  The present invention relates to a lighting device capable of emitting light in a large area by combining a plurality of panels.

  In recent years, diversification of illumination light sources has progressed, and various illumination devices have been proposed. Here, from the viewpoint of improving the interior design, for example, there is a demand for attaching to a wall surface or the like to cause surface emission. However, for example, in organic EL, which is considered promising as a future light source, there is a problem that it is difficult to manufacture a light emitting device with a large area at present. Therefore, there is an attempt to construct a large-area lighting device by combining panels such as small-sized organic EL.

  Here, in Patent Document 1, a U-shaped fixing member is provided on both upper and lower sides, a plurality of light emitting panels are slid and attached from the side, and power is supplied from an electrode on one side, or a recess is provided on the back surface. A technique is disclosed in which power is supplied from an electrode on one side attached from the front.

JP 2007-172918 A

  If it is made to show in patent document 1, it is possible to light-emit a small rectangular light emission panel, However, There exists a problem in comprising an illuminating device using this. More specifically, the problem is that organic EL and the like have a property to dislike dust and particularly moisture, so it is necessary to seal in a transparent resin or glass. However, when small-sized panels formed in this way are joined together to form a large-area lighting device, the light emitting part is not located at the joint between the panels, so the joint becomes dark and the interior design is impaired. There is a fear.

  The present invention has been made in view of the problems of the prior art, and an object of the present invention is to provide an illumination device that does not darken the joints and reduces discomfort even when a plurality of panels are combined to emit light in a large area. To do.

  The illumination device according to claim 1, wherein a sealed light emitting unit that emits light in a planar shape when supplied with power from outside, a light emitting surface that emits light emitted from the light emitting unit to the outside, and the light emitting surface intersect A lighting device having a plurality of panels each having an end surface that is adjacent to each other so that a joint between the light emitting surfaces of the panels is positioned in a normal direction of the light emitting unit. Features.

  According to the present invention, by devising the end surface shape of the panel, the end surfaces of the adjacent panels are overlapped so that the joint of the light emitting surface of the panel is positioned in the normal direction of the light emitting unit. The light emitting part is sealed so that the light emitted from the light emitting part on the back side of the joint of the light emitting surface is increased by the light emitted from the light emitting part, so that the joint is visually recognized. Therefore, it is possible to provide a lighting device that is difficult to perform and has little discomfort. “A light emitting portion that emits light in a planar shape” refers to, for example, organic EL, but is not limited thereto.

  The lighting device according to claim 2 is characterized in that, in the invention according to claim 1, the panel is detachably attached to a holder including wiring. Thereby, when a malfunction occurs in one of the panels, the lighting device can be continuously used by replacing only the panel in which the malfunction has occurred.

  According to a third aspect of the present invention, there is provided the lighting device according to the second aspect, wherein three or more of the panels are arranged side by side, and an end surface of the panel is inclined with respect to the normal direction. Along the direction, the panel at an arbitrary position is detachable from the holder. This saves the trouble of replacing the panel.

  According to a fourth aspect of the present invention, in the invention of the second aspect, the three or more panels are arranged side by side, and if the panel at a specific position is not removed, the other panels are removed from the holder. It is more non-detachable. Thereby, it can suppress that the said panel falls carelessly from the said holder.

  The lighting device according to claim 5 is the invention according to any one of claims 1 to 4, wherein one of the adjacent light emitting units is in the normal direction with respect to the other light emitting unit. It is characterized by overlapping. As a result, the joints of the panels become less noticeable.

  According to the present invention, even when a plurality of panels are combined to emit light over a large area, the lighting device can be provided that does not darken the joints and has less discomfort.

It is a front view of the illuminating device concerning the 1st Embodiment which arranged the panel 10 in the matrix form, and was comprised. It is the figure which cut | disconnected the structure of FIG. 1 by the II-II line | wire, and looked at the arrow direction. It is a figure which shows the assembly aspect of an illuminating device. It is a perspective view which shows the structure of a panel typically. It is sectional drawing which expands and shows the periphery of the terminal in this Embodiment. It is sectional drawing similar to FIG. 2 of the illuminating device concerning 2nd Embodiment. It is sectional drawing similar to FIG.3 (b) of the illuminating device concerning a modification. It is sectional drawing similar to FIG.3 (b) of the illuminating device concerning 3rd Embodiment. It is a figure which shows various modifications. It is sectional drawing similar to FIG. 5 which shows a modification. It is a perspective view of the illuminating device concerning another modification.

(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view of a lighting device according to the first embodiment, in which panels 10 are arranged in a matrix. FIG. 2 is a view of the configuration of FIG. 1 taken along the line II-II and viewed in the direction of the arrow. FIG. 3 is a diagram illustrating an assembly mode of the lighting device. FIG. 4 is a perspective view schematically showing the structure of the panel 10.

  In FIG. 4, each panel 10 has a common organic EL structure, specifically, a planar light emitting layer 11 extending over the entire panel 10, a cathode layer 12 and a transparent anode layer sandwiching the light emitting layer 11. 13 and a transparent plate 14 of glass or resin that covers and seals the periphery of the light emitting layer 11, the cathode layer 12, and the anode layer 13.

  In the present embodiment, as shown in FIG. 3, the transparent plate 14 includes a light emitting surface 14a located on the side opposite to the light emitting layer 11, a mounting surface 14c on the side opposite to the light emitting surface 14a, the light emitting surface 14a and the mounting surface. And an end surface 14b intersecting the surface 14c. The end surface 14b is inclined obliquely on the light emitting surface 14a side, but is orthogonal on the mounting surface 14c side. Note that the inclination of the end face 14 b is opposite on both sides of one panel 10. It is assumed that another end surface 14e (see FIG. 1) intersecting the end surface 14 is a single plane orthogonal to the light emitting surface 14a.

  Each panel 10 is attached to a plate-shaped holder 20. Here, the mounting mode of the panel 10 will be described. As shown in FIG. 5, on the mounting surface 14c side of the panel 10, metal terminals 15 extending from the cathode layer 12 and the anode layer 13 are spherical. Exposed. On the other hand, a spherical hole 20a is formed on the upper surface of the holder 20, and a metal terminal 21 is provided on the bottom thereof. The terminal 21 extends through the holder 20 and is connected to a wiring 22 that receives power from the outside.

  When the panel 10 is attached to the holder 20, when the spherical terminal 15 is pressed toward the hole 20 a, the hole 20 a is elastically deformed so that the inlet of the hole 20 a is opened, and the elastic deformation is restored when the terminal 15 is accommodated inside. The terminal 15 is fitted to the terminal. As a result, the panel 10 is held by the holder 20, and the terminal 15 is connected to the wiring 22 through the terminal 21, so that power can be supplied to the cathode layer 12 and the anode layer 13 from the outside. When a force is applied so that the panel 10 is peeled off from the holder 20, the spherical terminal 15 is detached from the hole 20a, so that the panel 10 can be easily attached and detached.

  FIG. 10 is a cross-sectional view similar to FIG. In the present modification, metal terminals 15 ′ extending from the cathode layer 12 and the anode layer 13 protrude from the mounting surface 14 c side of the panel 10. On the other hand, a circular or rectangular hole 20a 'as viewed from the panel 10 side is formed on the upper surface of the holder 20, and a wiring extending through the holder 20 to receive power from the outside is formed at the bottom thereof. 22 is exposed.

  According to this modified example, when the panel 10 is attached to the holder 20, the terminal 15 'enters the hole 20a' and comes into contact with the wiring 22, so that the same as in the above-described embodiment. Power can be supplied to the cathode layer 12 and the anode layer 13 from the outside. Further, the terminal 15 ′ can be relatively moved while being in contact with the wiring 22, whereby the panel 10 can be relatively displaced with respect to the holder 20. However, a fitting portion or the like for fixing the panel 10 to the holder 20 is necessary separately.

  When the adjacent panels 10 are assembled to each other, as shown in FIG. 3, the end surface 14b of the panel 10 with the light emitting surface 14a projecting outward and the end surface 14b of the panel 10 with the light emitting surface 14a retracted inward are brought into contact with each other. And attach to the holder 20. Then, the joint (A) on the light emitting surface 14a side is positioned on the normal line of the light emitting layer 11 of the panel 10 in which the light emitting surface 14a is recessed.

  When power is supplied to each panel 10 from the outside and a voltage is applied to the light emitting layer 11 from the cathode layer 12 and the anode layer 13, holes and electrons having positive and negative charges are generated. When the two layers are combined in the light emitting layer 11, the organic material that is a light emitting material once enters a high energy state called excitation, and light emission occurs when this returns to the original stable state.

  When the light emitting layer 11 emits light, most of the emitted light passes through the transparent anode layer 13 and the transparent plate 14 and is emitted from the light emitting surface 14a. At this time, since the strongest light is emitted along the normal direction V of the light emitting layer 11, the light emitted from the light emitting layer 11 close to the end face 14b passes through the space between the end face 14b immediately above it to the outside. Thus, the joint (A) on the light emitting surface 14a side can be made inconspicuous. Therefore, the luminous flux emitted from the lighting device of the present embodiment is almost uniform, and thus, the large area illumination with little discomfort can be performed by combining the small area panels 10.

(Second Embodiment)
FIG. 6 is a cross-sectional view similar to FIG. 2 of the illumination device according to the second embodiment. In the present embodiment, the entire end face 14b is inclined at a uniform angle. Thereby, only the center panel 10 among the arranged panels 10 can be pulled out in a direction along the end surface 14b (illustrated by an arrow), whereby only the panel 10 in which a problem has occurred can be easily replaced. . Other configurations are the same as those in the above-described embodiment.

  FIG. 7 is a cross-sectional view similar to FIG. 3B of a lighting device according to a modification. In the present modification, the light emitting layer 11, the cathode layer 12 and the anode are obliquely arranged along the end surface 14b on the end surface 14b side of the panel 10 with the light emitting surface 14a projecting outward from the embodiment of FIG. The difference is that the layer 13 extends. As a result, the light emitting layer 11 of the panel 10 with the light emitting surface 14a retracted inward is positioned inside the light emitting layer 11 of the panel 10 with the light emitting surface 14a projecting outward, that is, the light is emitted along the normal direction V. This is an example in which the layer 11 is doubled.

  In the present modification, the light emitting layer 11 that is doubled eliminates the cut of the light emitting surface at the joint of the panel 10, so that it is possible to perform illumination of a large area with less discomfort.

(Third embodiment)
FIG. 8 is a cross-sectional view similar to FIG. 3B of the illumination device according to the third embodiment. In the present embodiment, on one end side of the panel 10, the light emitting surface 14a side projects outward in parallel, and on the other end side, the light emitting surface 14a side retracts inward in parallel correspondingly. Thereby, the joint of the panel 10 becomes a crank shape. In the present embodiment, after the panels 10 are mounted side by side, it is not possible to remove only the central panel 10 but it is necessary to remove it from the end panel 10.

  Further, in the present embodiment, the light emitting layer 11, the cathode layer 12, and the anode layer 13 are extended in a crank shape to the portion projecting outward in parallel, so that the panel 10 having the light emitting surface 14a projecting outward is provided. In this example, the light emitting layer 11 of the panel 10 with the light emitting surface 14a retracted inside is located inside the light emitting layer 11, that is, the light emitting layer 11 is doubled along the normal direction V.

  The end face shape of the panel 10 may be an arc shape as shown in FIG. 9B, or an uneven shape as shown in FIG. 9C, in addition to that shown in FIG. 9A. In the example of FIG. 9B, as shown in FIG. 9D in which the connecting portion is enlarged, the light emitting layer 11 is made to wrap around to the center protruding portion on the end surface 14b side where the center protrudes. Alternatively, in the example of FIG. 9 (c), as shown in FIG. 9 (e) showing an enlarged connection portion, the light emitting layer 11 is extended in a crank shape up to the center protruding portion on the end surface 14b side where the center protrudes. If present, the joints of the light emitting surfaces are not visible, which is preferable.

  FIG. 11 is a perspective view of a lighting device according to another modification. In FIG. 11, the side surfaces 14c and 14e of the panel 10 intersecting each other are inclined with respect to the light emitting surface 14a. Therefore, when removing an arbitrary panel 10, as indicated by an arrow, it may be extracted in a direction along both the side surfaces 14c and 14e.

  The attachment of the panel 10 to the holder 20 is not limited to the above, and there are various modes such as a magnet, a magic tape, an adhesive sheet, a suction cup, and insertion. Further, when the panel 10 is fixed to the holder 20, an adhesive may be applied to the joints.

DESCRIPTION OF SYMBOLS 10 Panel 11 Light emitting layer 12 Cathode layer 13 Anode layer 14 Transparent plate 14a Light emitting surface 14b End surface 14c Mounting surface 15 Terminal 20 Holder 20a Hole 21 Terminal 22 Wiring

Claims (5)

A plurality of panels each having a sealed light emitting unit that emits light in a planar shape when supplied with power from the outside, a light emitting surface that emits light emitted from the light emitting unit to the outside, and an end surface that intersects the light emitting surface. A lighting device comprising:
The adjacent end faces are overlapped so that a joint of the light emitting surfaces of the panel is located in the normal direction of the light emitting unit.   The lighting device according to claim 1, wherein the panel is detachably attached to a holder including wiring.   Three or more panels are arranged side by side, and an end surface of the panel is inclined with respect to the normal line direction, and the panel at an arbitrary position can be detached from the holder along the inclination direction. The lighting device according to claim 2.   3. The lighting device according to claim 2, wherein three or more panels are arranged side by side, and the other panels cannot be detached from the holder unless the panel at a specific position is removed. .   5. The lighting device according to claim 1, wherein one of the adjacent light emitting units overlaps with the other light emitting unit in the normal direction. 6.

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