JP2015141782A - Surface light-emitting module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface light-emitting module capable of achieving thinning, by being simply installed in an object to be fitted having a curved surface, and by suppressing luminance unevenness when a plurality of modules are arranged.SOLUTION: A surface light-emitting module 40 includes a planar light source part 2 composed of a plurality of light-emitting elements 10; a bendable/deformable sealing member 30 that seals the light-emitting element 10; and a fitting member 20 for fitting the sealing member 30 to an object to be fitted. The sealing member 30 includes a covering part that covers the light source part 2 and an ear part positioned around the covering part, and the light-emitting element 10 has a light-emitting surface on the front surface side of the sealing member 30. Fitting regions 33a, 33b for being fitted to the object to be fitted via the fitting member 20 are formed by an ear part by means that the ear part is folded back in the vicinity of the boundary between the covering part and the ear part so that a potion corresponding to the ear part out of the rear surface of the sealing member 30 is opposed to a portion corresponding to the covering part out of the rear surface of the sealing member.

Description

  The present invention relates to a surface emitting module, and more particularly to a surface emitting module that can be installed on various installation surfaces such as a wall surface, a ceiling surface, and a floor surface.

  In recent years, various lighting devices including a surface light emitting module using an organic EL (Organic Electroluminecense) element have been proposed. Such an illuminating device is required to be enlarged from the viewpoint of diversification. As a means for increasing the size of the lighting device, it is conceivable to increase the substrate size. However, in this case, problems such as an increase in manufacturing cost due to an increase in the size of the manufacturing apparatus and a decrease in yield occur. In view of this, there has been proposed an illuminating device that is enlarged by arranging a plurality of surface-emitting modules that are relatively easy to manufacture in a matrix.

  The surface light emitting module has a light emitting part and a non-light emitting part located around the light emitting part. For this reason, when arranging a plurality of surface light emitting modules, it is required to make the non-light-emitting portion located near the joint between the surface light emitting modules inconspicuous from the viewpoint of design and functionality.

  A display device that is not a lighting device but is formed by arranging a plurality of display devices in which organic EL elements are formed on a small substrate, and which can make a joint between the small substrates inconspicuous is disclosed in JP -266285 (patent document 1).

  In the display device disclosed in Patent Document 1, the side end surfaces of a plurality of small substrates are joined together and the plurality of small substrates are arranged in a plane. In the joint portion between the small substrates, a side end surface having an upward forward taper provided on one small substrate and a side end surface having a downward forward taper provided on the other small substrate are joined.

  When the configuration of Patent Document 1 is applied to a lighting device formed by arranging a plurality of surface emitting modules, the interval between the surface emitting modules can be reduced to some extent. However, a considerable amount of non-light-emitting portions remain, so that light and darkness occurs between the light-emitting portions and the non-light-emitting portions. For this reason, luminance unevenness cannot be improved sufficiently. On the other hand, in order to narrow a non-light-emitting part, when the sealing member which seals an organic EL element narrows the area | region which protrudes from the said organic EL element, a concern that reliability falls may arise.

  Therefore, in the case of arranging a plurality of organic EL elements, there is provided a surface emitting module capable of narrowing the non-light emitting portion as a whole without reducing the sealing region of the sealing member in each organic EL element and impairing the reliability. JP, 2009-205897, A (patent documents 2).

  A surface emitting module disclosed in Patent Document 2 includes a plurality of organic EL elements each provided with an organic light emitting layer so as to be sandwiched between an anode and a cathode on a substrate, and a support substrate having fixing holes for fixing the organic EL elements With. Each of the plurality of organic EL elements is disposed so that a plurality of bent end portions are inserted into the mounting holes and are adjacent to each other. Under the present circumstances, the organic light emitting layer is extended | stretched and arrange | positioned at the area | region of the bent edge part. By comprising in this way, the generation | occurrence | production of the brightness nonuniformity resulting from the joint between organic EL elements can be improved.

  In the case where a plurality of display devices are arranged in the same manner, a display device that can be narrowed as a whole without reducing reliability by narrowing individual frame regions that do not contribute to display is a special feature. This is disclosed in Japanese Unexamined Patent Publication No. 2011-47977 (Patent Document 3).

  The display device disclosed in Patent Document 3 includes a display region and a frame region located around the display region, and a display panel including an electro-optic layer in the display region and a planar size that is substantially the same as the display region. And a support frame for supporting the display panel. The frame area is bent from the peripheral edge of the display area to the support frame side and fixed to the side surface of the support frame. By configuring in this way, it is possible to suppress deterioration in image quality due to the joint.

JP 2005-266285 A JP 2009-205897 A JP 2011-47977 A

  In recent years, in addition to reducing luminance unevenness as described above, lighting devices are required to be easily attachable to an object to be attached such as a wall surface or a curved column. Furthermore, thinning is required from the viewpoint of design.

  Here, in the configuration disclosed in Patent Document 2, since the support substrate is rigid (rigid), it is difficult to bend the surface emitting module and install it on a curved surface. When a case having a shape corresponding to a curved surface is separately provided and the surface emitting module is installed on the curved surface, the thickness increases.

  In the case where a certain thickness is allowed and the case can be used, a holding structure capable of holding the surface emitting module can be provided in the case. In this case, since the shape of the surface light emitting module is stabilized by being held by the housing, the surface light emitting module can be easily attached to the attachment.

  However, when thinning is required, the housing cannot be used, so that even if the shape of the surface emitting module is not stable, the surface emitting module can be easily attached to the attachment. Is required separately. However, in Patent Document 2, a mounting structure suitable for thinning is not sufficiently considered.

  Even when the configuration disclosed in Patent Document 3 is applied to a surface light emitting module, it is difficult to install the surface light emitting module on a curved surface because the support frame is rigid (rigid). Further, as described above, a mounting structure suitable for thinning is not sufficiently considered.

  The present invention has been made in view of the problems as described above, and the object of the present invention is to realize a reduction in thickness, and can be easily installed on an object having a curved surface, An object of the present invention is to provide a surface light emitting module that can suppress uneven brightness when a plurality of light emitting elements are arranged.

  A surface light emitting module according to the present invention is attached to an attachment, and includes a planar light source unit composed of a single light emitting element or a plurality of light emitting elements arranged in a plane, a front surface, A sealing member having a back surface and capable of bending deformation for sealing the light emitting element so that the light source part is embedded therein, and an attachment member for attaching the sealing member to an attachment Prepare. The sealing member includes a covering portion that covers the light source portion, and an ear portion that is located around the covering portion, and the light is emitted from the front surface side of the sealing member. The light emitting element has a light emitting surface on the front surface side of the sealing member. Of the back surface of the sealing member, between the covering portion and the ear portion, the portion corresponding to the ear portion is opposed to the portion corresponding to the covering portion of the back surface of the sealing member. When the ear is folded in the vicinity of the boundary, an attachment region for attaching to the attachment object via the attachment member is formed by the folded ear.

  In the surface light emitting module according to the present invention, it is preferable that the light emitting element is bendable.

  In the surface emitting module according to the present invention, it is preferable that the folded back ear portion is fixed to the covering portion to form a cylindrical space between the covering portion.

  In the surface emitting module according to the present invention, the attachment member is preferably a wire or a band-shaped member. In this case, the wire or the band-shaped member is inserted into a cylindrical space formed between the folded ear portion and the covering portion, and the wire or the band-shaped member is attached. It is preferable that the said surface emitting module is attached to a to-be-attached object by being fixed to.

  In the surface emitting module according to the present invention, it is preferable that the mounting member is configured by a locked portion that can be locked by a locking portion provided on the mounted object side. . In this case, the locked portion is provided in a portion corresponding to the attachment region in the front surface of the ear portion of the sealing member, and the locked portion is the locking portion. It is preferable that the said surface emitting module is attached to a to-be-attached object by being latched by.

  In the surface emitting module according to the present invention, it is preferable that the locked portion is detachably locked to the locking portion.

  In the surface light emitting module according to the present invention, the light emitting element includes a transparent base material, a barrier layer laminated in order on the main surface of the transparent base material located on the side opposite to the light emitting surface side, and an anode And an organic layer and a cathode, and a sealing layer for sealing the anode, the organic layer and the cathode. The organic layer is preferably formed so as to be located inside the barrier layer when viewed in a plan view, and the barrier layer is disposed at a central portion in the thickness direction of the surface emitting module. preferable. In this case, it is preferable that the sealing member is folded at a portion outside the organic layer as viewed in a plan view and including the barrier layer.

  According to the present invention, it is possible to provide a surface light emitting module that can be thinned and can be easily installed on an object to be attached having a curved surface, and can suppress uneven luminance when arranged in a plurality. Can do.

It is the schematic which shows the illuminating device which comprised the surface emitting module which concerns on Embodiment 1 of this invention. It is the schematic which shows the surface emitting module which concerns on Embodiment 1 of this invention. It is a top view of the light emitting element with which the surface emitting module shown in FIG. 2 is equipped. It is sectional drawing along the IV-IV line shown in FIG. FIG. 3 is a development view of the surface emitting module shown in FIG. 2. It is a schematic sectional drawing in alignment with the VI-VI line shown in FIG. It is a figure which shows the 1st process of the process of folding an ear | edge part in the manufacturing method of the surface emitting module shown in FIG. It is a top view which shows the back surface of the surface emitting module in the state after the 1st process shown in FIG. It is a figure which shows the 2nd process of the process of turning back an ear | edge part in the manufacturing method of the surface emitting module shown in FIG. It is a top view which shows the back surface of the surface emitting module in the state after the 2nd process shown in FIG. It is a top view which shows the surface of the surface emitting module in the state after the 2nd process shown in FIG. It is a schematic sectional drawing of the surface emitting module which concerns on Embodiment 2 of this invention. It is a figure which shows the thickness of each layer which comprises the surface emitting module shown in FIG. It is a top view which shows the back surface of the surface emitting module which concerns on Embodiment 3 of this invention. It is the schematic which shows the illuminating device which comprised the surface emitting module which concerns on Embodiment 3 of this invention. It is a top view which shows the back surface of the surface emitting module which concerns on Embodiment 4 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, the same or common parts are denoted by the same reference numerals in the drawings, and description thereof will not be repeated. In the description of the embodiments and the modified examples, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified.

(Embodiment 1)
FIG. 1 is a schematic view showing an illuminating device including a surface light emitting module according to an embodiment of the present invention. FIG. 2 is a schematic view showing a surface emitting module according to the embodiment of the present invention. With reference to FIG. 1 and FIG. 2, the surface emitting module 40 which concerns on this Embodiment is demonstrated.

  As shown in FIG. 1, the illumination device 100 is configured by tiling a plurality of surface emitting modules 40 in a matrix. The illumination device 100 is installed along the installation surface 201 of the attachment 200. The attached object 200 is, for example, a column having a columnar shape, and has a curved surface as the installation surface 201. The plurality of surface emitting modules 40 are attached to the attachment object 200 via the wires 20.

  As shown in FIG. 2, the surface emitting module 40 emits light from the surface 40a. Further, the surface light emitting module 40 is detachably attached to the attachment object 200 such that the back surface 40 b faces the installation surface 201 of the attachment object 200. The surface light emitting module 40 includes a planar light source unit 2 including three light emitting elements 10, a wire 20 as an attachment member, and a sealing member 30.

  In the surface light emitting module 40, end portions 31 a and 31 b of the sealing member 30 are folded back toward the back surface 30 b (see FIG. 6) side of the sealing member 30, so that attachment regions 33 a and 33 b are formed. The attachment regions 33a and 33b are portions for attaching the surface emitting module 40 to the attachment object 200 via an attachment member.

  The light source unit 2 has a substantially rectangular shape so as to surround the three light emitting elements 10. For convenience, the light source unit 2 includes a non-light emitting region R2 (see FIG. 4) and a region 3 between the three light emitting elements 10 that do not contribute to light emission. The three light emitting elements 10 have a substantially rectangular shape. The three light emitting elements 10 are electrically connected in series by connection wiring (not shown). When connecting the connection wiring and the electrode, silver paste, solder, conductive tape or the like is used. Connection wiring drawn from both ends of the three light emitting elements 10 electrically connected in series is taken out to the back surface 40b side of the surface light emitting module 40 as an electrical connection portion (not shown).

  The above-described electrical connection unit is connected to an external power source via a wiring unit (not shown). A drive current from an external power source is supplied to the light emitting element 10 through the wiring portion, the electrical connection portion, and the connection wiring described above. Thereby, the light emitting element 10 emits light, and light is emitted from the surface 40a of the surface emitting module.

  FIG. 3 is a plan view of a light emitting device included in the surface light emitting module shown in FIG. 4 is a cross-sectional view taken along line IV-IV shown in FIG. The light emitting element 10 will be described with reference to FIGS. 3 and 4.

  As shown in FIGS. 3 and 4, the light emitting element 10 is composed of an organic EL element that has flexibility and can be bent and deformed, for example. The light emitting element 10 includes a transparent substrate 11, a barrier layer 12, an anode 13, an organic layer 14, a cathode 15, a sealing layer 16, an insulating layer 17, and a light emitting surface 11a. The barrier layer 12, the anode 13, the organic layer 14, and the cathode 15 are sequentially stacked on the surface of the transparent substrate 11.

  The transparent base material 11 has translucency and a flexible material is used. As the transparent base material 11, it is comprised from the thin glass substrate which has flexibility, for example. Moreover, as the transparent base material 11, transparent resin films, such as PET (polyethylene terephthalate), PEN (polyethylene naphthalate), and PC (polycarbonate), may be used. The light emitting surface 11 a is formed on the surface of the transparent substrate 11 opposite to the organic layer 14. In addition, you may provide a hard-coat layer on both surfaces of the transparent base material 11 as needed.

  The barrier layer 12 blocks oxygen and moisture in the atmosphere. As a material of the barrier layer 12, a metal oxide such as silicon oxide, silicon nitride, silicon oxynitride, aluminum nitride, or aluminum oxide, or a metal nitride can be employed. These materials have an oxygen barrier function in addition to a water vapor barrier function. In particular, silicon nitride and silicon oxynitride having favorable barrier properties, solvent resistance, and transparency are preferable. Further, the barrier layer 12 may have a multilayer structure as necessary. As a method for forming the barrier layer 12, a resistance heating vapor deposition method, an electron beam vapor deposition method, a reactive vapor deposition method, an ion plating method, a sputtering method, or the like can be used depending on the material.

  The anode 13 is a conductive film having transparency. In order to form the anode 13, ITO (Indium Tin Oxide) or the like is formed on the barrier layer 12 by sputtering or the like. The anode 13 is formed by patterning the ITO film into a predetermined shape by photolithography or the like. The anode 13 in the present embodiment is divided into two regions by patterning in order to form an electrode portion 18 (for anode) and an electrode portion 19 (for cathode).

  The organic layer 14 (light source unit) can generate light (visible light) by being supplied with electric power. The organic layer 14 may be composed of a single light emitting layer, or may be composed of a hole transport layer, a light emitting layer, a hole blocking layer, an electron transport layer, and the like that are sequentially laminated. The organic layer 14 is formed so as to be located inside the barrier layer 12 when seen in a plan view.

  The cathode 15 is aluminum (AL), for example. The cathode 15 is formed so as to cover the organic layer 14 by a vacuum deposition method or the like. In order to pattern the cathode 15 into a predetermined shape, a mask may be used during vacuum deposition.

An insulating layer 17 is provided between the cathode 15 and the anode 13 on the electrode part 18 side so that the cathode 15 and the anode 13 are not short-circuited. The part of the cathode 15 opposite to the side on which the insulating layer 17 is provided is connected to the anode 13 on the electrode part 19 side. The insulating layer 17 is formed in a desired pattern so as to cover a portion that insulates the anode 13 and the cathode 15 from each other using a photolithography method or the like after, for example, a SiO ₂ film is formed using a sputtering method. .

  The sealing layer 16 is made of an insulating resin or a glass substrate. The sealing layer 16 is formed to protect the organic layer 14 from moisture and the like. The sealing layer 16 seals substantially the entire anode 13, organic layer 14, and cathode 15 on the transparent substrate 11. A part of the anode 13 is exposed from the sealing layer 16 for electrical connection.

  The portion of the anode 13 exposed from the sealing layer 16 (on the left side in FIG. 4) constitutes an electrode portion 18. The electrode part 18 and the anode 13 are made of the same material. The electrode portion 18 is located on the outer peripheral portion of the light emitting element 10. The portion of the anode 13 exposed from the sealing layer 16 (on the right side in FIG. 4) constitutes an electrode portion 19. The electrode part 19 and the anode 13 are made of the same material. The electrode portion 19 is also located on the outer peripheral portion of the light emitting element 10. The electrode part 18 and the electrode part 19 are located on the opposite sides of the organic layer 14. A wiring pattern (not shown) is attached to the electrode portion 18 and the electrode portion 19 using soldering (silver paste) or the like.

  In the light emitting element 10 configured as described above, the light emitting region R1 and the non-light emitting region R2 are formed on the light emitting surface 11a of the transparent substrate 11. The portion where the light emitting region R1 is formed is located on the center side of the light emitting surface 11a (light emitting surface) and substantially corresponds to the region where the organic layer 14 is formed. The portion where the non-light emitting region R2 is formed is located on the outer periphery of the light emitting region R1, and substantially corresponds to the region where the electrode portions 18 and 19 are formed.

  FIG. 5 is a development view of the surface emitting module shown in FIG. 6 is a schematic cross-sectional view taken along the line VI-VI shown in FIG. In FIG. 6, the anode, the cathode, the insulating layer, and the electrode portion are omitted. With reference to FIG. 5 and FIG. 6, the detail of the sealing member 30 and the attachment area | regions 33a and 33b is demonstrated.

  As shown in FIG. 5, the sealing member 30 includes a covering portion 34 that covers the light source unit 2 and an ear portion 35 (see FIG. 3) that is positioned around the covering portion 34. The covering portion 34 is located approximately at the center of the sealing member 30. The ear portion 35 is provided in a predetermined size in order to ensure the reliability of the light emitting element 10.

  The ear portion 35 includes a first region 35a, a second region 35b, a third region 35c, and a fourth region 35d. The first region 35a and the second region 35b are located on the long side of the light emitting element 10, and are provided facing each other so as to sandwich the three light emitting elements 10 therebetween. The third region 35c and the fourth region 35d are located on the short side of the light emitting element 10, and are provided facing each other so as to sandwich the three light emitting elements 10 therebetween.

  In the surface light emitting module 40, the third region 35 c and the fourth region 35 d are folded back in the vicinity of the boundary between the ear portion 35 and the covering portion 34 on the short side of the light emitting element 10, and The first region 35a and the second region 35b are formed by folding the ear portion 35, the covering portion 34, and the vicinity of the boundary portion.

  As shown in FIG. 6, the sealing member 30 has a front surface 30a and a back surface 30b. The sealing member 30 seals the three light emitting elements 10 so that the light source unit 2 (see FIG. 5) is embedded therein. The sealing member 30 seals the light emitting element 10 so that the light emitting surface 11 a of the light emitting element 10 faces the front surface 30 a side of the sealing member 30. Thereby, light can be emitted from the front surface 30 a of the sealing member 30.

  The sealing member 30 includes a first sealing portion 36 constituting the front surface 30a side and a second sealing portion 37 constituting the back surface 30b side. The sealing member 30 is provided by thermally welding, bonding, or the like in a vacuum state with the light emitting element 10 sandwiched between the first sealing portion 36 and the second sealing portion 37.

  As a material for the first sealing portion 36 and the second sealing portion 37, a soft material having translucency and flexibility so as to be bendable can be adopted. Specifically, it is preferable to employ a known transparent resin film such as PET, PEN, or PC as a material for the first sealing portion 36 and the second sealing portion 37.

  In addition, the 1st sealing part 36 and the 2nd sealing part 37 may be comprised with the same material, and may be comprised with a different material. Moreover, as long as the surface 40a side of the surface emitting module 40 is comprised so that it may have light transmittance, the 2nd sealing part 37 may be comprised so that it may not have translucency. For example, the 2nd sealing part 37 may be comprised by the laminated film of metal films, such as aluminum, and a resin film.

  The attachment regions 33 a and 33 b are spaces formed between the folded ear portion 35 and the covering portion 34. The ear portion 35 is folded so that a portion corresponding to the ear portion 35 of the back surface 30 b of the sealing member 30 faces a portion corresponding to the covering portion 34 of the back surface 30 b of the sealing member 30. The tip of the folded ear 35 is fixed to the covering 34. The wire 20 is inserted into the space formed between the folded ear portion 35 and the covering portion 34, and the wire 20 is fixed to the attachment, whereby the surface emitting module 40 is attached to the attachment 200. It is done.

  7 to 11 are diagrams showing a first step and a second step of the step of folding back the ear portion in the method of manufacturing the surface emitting module shown in FIG. 2, and the surface emitting module in a state after the first step and the second step. It is a top view which shows the surface or back surface of. A method for manufacturing the surface emitting module 40 will be described with reference to FIGS.

  When manufacturing the surface light emitting module 40, first, in the step of preparing the light emitting element 10, the substantially rectangular shape having the above-described configuration and having the organic layer 14 interposed between the pair of anode 13 and cathode 15 is provided. The light emitting element 10 is prepared. Subsequently, in the step of sealing the light emitting element 10 with the sealing member 30, the light emitting element 10 is sealed with the sealing member 30 so that the light source unit 2 including the plurality of light emitting elements 10 is embedded therein. Thereby, the cover part 34 which covers the light source part 2 in the sealing member 30 and the ear | edge part 35 located in the circumference | surroundings of the said cover part 34 are formed.

  Next, as shown in FIG. 7, in the first step of folding the ear 35, the third region 35 c and the fourth region 35 d located on the short side of the light emitting element 10 in the ear 35 are indicated by arrows A and B. As shown in FIG. At this time, the third region 35c and the fourth region 35d are folded back at the boundary portions L1 and L2 between the ear portion 35 and the covering portion 34. Here, the boundary vicinity L1, L2 refers to a position along the end of the transparent substrate 11 on the short side of the light emitting element 10 or a position slightly away from the end.

  As shown in FIG. 8, in the state after the first step, a part of the back surface of the third region 35c and the fourth region 35d is opposed to the end portion on the short side of the back surface of the covering portion 34, respectively. . In this state, the back surfaces of the third region 35 c and the fourth region 35 d are fixed to the back surface 30 b of the sealing member 30. In this case, it is preferable that the gap is not formed between the back surface of the third region 35c and the fourth region 35d and the back surface of the sealing member 30b. This makes it possible to easily fold back the first region 35a and the second region 35b in the second step of turning back the ear portion 35, which is the next step. For fixing, an adhesive, a double-sided tape, a single-sided tape, or the like is used.

  Subsequently, as shown in FIG. 9, in the second step of folding the ear portion 35, the first region 35 a and the second region 35 b located on the long side of the light emitting element 10 in the ear portion 35 are indicated by arrows C and D. As shown in FIG. At this time, the first region 35 a and the second region 35 b are folded back at the boundary portions L 3 and L 4 between the ear portion 35 and the covering portion 34. Here, boundary vicinity L3, L4 refers to a position along the end of the transparent substrate 11 on the long side of the light emitting element 10 or a position slightly away from the end.

  As shown in FIG. 10, in the state of the second step, the back surfaces of the first region 35 a and the second region 35 b face the back surface of the covering portion 34. In this state, the end portions 31 a and 31 b of the sealing member 30 that are the tip portions of the folded first region 35 a and second region 35 b are fixed to the back surface of the covering portion 34. For fixing, an adhesive, a double-sided tape, a single-sided tape, or the like is used. By fixing the end portions 31 a and 31 b of the sealing member 30, a cylindrical space is formed between the back surface of the folded first region 35 a and second region 35 b and the back surface of the covering portion 34. . Thereby, attachment area | region 33a, 33b (refer FIG. 2, FIG. 6) is formed with the ear | edge part 35 turned back.

  In addition, the cylindrical space includes not only a space having a cylindrical shape but also a space having a shape obtained by expanding the cylindrical shape horizontally. The shape obtained by expanding the cylindrical shape horizontally includes a shape in which the fixed end portions 31a and 31b are narrow and the folded side is wide.

  Subsequently, the wire 20 is inserted into the attachment regions 33a and 33b. Thereby, the surface emitting module 40 which concerns on this Embodiment is manufactured.

  As shown in FIG. 11, in the surface light emitting module 40 according to the present embodiment, the sealing member 30 is folded back in the vicinity of the boundary portion between the ear portion 35 and the covering portion 34, so When viewed from the front surface 40a), the region of the portion that does not emit light (non-light emitting portion) is narrow. For this reason, when a plurality of the surface emitting modules 40 are arranged in a matrix, the interval between the adjacent light source units 2 can be narrowed, and luminance unevenness can be suppressed.

  Moreover, since the ear | edge part 35 does not appear in the front by folding, the ear | edge part 35 can be formed in a comparatively wide range. Thereby, the reliability of sealing can be improved.

  In the surface light emitting module 40 according to the present embodiment, the attachment regions 33a and 33b are formed by folding the ear portion 35 while keeping the thickness of the surface light emitting module 40 thin. The surface emitting module 40 can be attached to the attachment object 200 by inserting the wire 20 into the attachment regions 33 a and 33 b and attaching the wire 20 to the attachment object 200.

  For this reason, the surface emitting module 40 can be easily attached to the attachment object 200 without using a complicated attachment structure. Further, since a member such as a housing having a complicated mounting structure is not required, it is possible to reduce the thickness.

  Furthermore, since it is not necessary to perform the process for attachment to the installation surface of the to-be-attached object 200, the surface emitting module 40 can be attached more simply. When the surface emitting module 40 is removed, no processing trace is left on the attached object 200.

  Further, since the surface light emitting module 40 can be bent and deformed, the surface light emitting module 40 can be attached along the installation surface even when the surface light emitting module 40 is attached to an attachment such as a column having a curved surface. For this reason, the degree of freedom of the mounting location is improved, and the design of the surface emitting module 40 is also improved.

  In the present embodiment, the case where the attachment member for attaching the sealing member 30 to the attachment object is illustrated as an example. However, the present invention is not limited thereto, and the attachment member may be a ribbon, a belt, or the like. The belt-shaped member can be employed.

(Embodiment 2)
FIG. 12 is a schematic cross-sectional view of the surface emitting module according to the present embodiment. FIG. 13 is a diagram showing the thickness of each layer constituting the surface emitting module shown in FIG. In FIG. 12, the anode, the cathode, the insulating layer, and the electrode portion are omitted. A surface emitting module 40A according to the present embodiment will be described with reference to FIGS.

  When compared with the surface light emitting module 40 according to the first embodiment, the surface light emitting module 40A according to the present embodiment differs in the position where the sealing member 30 is folded back, and the other configurations are substantially the same. The surface emitting module 40 according to the present embodiment is manufactured according to the method for manufacturing the surface emitting module according to the first embodiment.

  The sealing member 30 is folded back at a portion L5 including the barrier layer 12 outside the organic layer 14 when seen in a plan view. The portion L5 is located in the vicinity of the boundary portion between the covering portion 34 and the ear portion 35 and is a portion closer to the organic layer 14 from the end portion of the transparent substrate 11.

  In this case, the barrier layer 12 is bent. In general, the barrier layer 12 is more likely to be broken by stress generated at the time of folding, as compared to other layers. When the surface emitting module is folded, if the barrier layer 12 is disposed on the inner side of the center portion in the thickness direction of the surface emitting module, a compressive stress is applied to the barrier layer 12. On the other hand, when the barrier layer 12 is disposed outside the center in the thickness direction of the surface emitting module, a tensile stress is applied to the barrier layer 12. Thus, when compressive stress and tensile stress are applied, the barrier layer is easily broken.

  For this reason, in this embodiment, in order to relieve the stress applied to the barrier layer 12, the barrier layer 12 is disposed at the center in the thickness direction of the surface emitting module 40A. In this case, the thickness of each layer of the surface emitting module 40A is appropriately adjusted.

  As shown in FIG. 13, the second sealing portion 37 and the first sealing portion 36 are adhered to the light emitting element 10 using an adhesive layer, and the sealing layer 16 includes a laminate layer and an organic layer. And an adhesive for adhering to. A hard coat layer is formed on both surfaces of the transparent substrate 11.

  In this case, the thickness of the second sealing portion 37 is 25 μm, and the thickness of the adhesive layer positioned between the second sealing portion 37 and the sealing layer 16 is 20 μm. The laminate layer (laminated film of aluminum and PET) of the sealing layer 16 is 55 μm, and the thickness of the adhesive positioned between the laminate layer and the organic layer 14 is 56 μm. The thickness of the organic layer 14 is 0.6 μm, and the thickness of the barrier layer 12 is 0.6 μm. Furthermore, the thickness of the transparent substrate 11 is 100 μm, and the thickness of the hard coat layers formed on both surfaces of the transparent substrate 11 is 6 μm. In addition, the thickness of the first sealing portion 36 is set to 25 μm, and the adhesive layer is located between the hard coat layer formed on the light emitting surface 11 a side of the transparent substrate 11 and the first sealing portion 36. The thickness is set to 25 μm. The thickness of each layer is an example, and can be changed as appropriate without departing from the scope of the present invention.

  In the present embodiment, the barrier layer 12 is arranged at the center in the thickness direction of the surface emitting module 40A, and the sealing member 30 is outside the organic layer 14 and includes the barrier layer 12 in plan view. By being folded back at the portion, the region of the portion that does not emit light (non-light emitting portion) can be further narrowed as compared with the first embodiment.

  For this reason, in this Embodiment, the effect equivalent to or more than Embodiment 1 is acquired. In particular, by further narrowing the area of the portion that does not emit light, it is possible to further reduce luminance unevenness that occurs at the joint when a plurality of surface emitting modules are arranged.

(Embodiment 3)
FIG. 14 is a plan view showing the back surface of the surface emitting module according to the present embodiment. FIG. 15 is a schematic view showing an illuminating device including the surface emitting module according to the present embodiment. With reference to FIG. 14 and FIG. 15, the surface emitting module 40B according to the present embodiment will be described.

  As shown in FIGS. 14 and 15, the surface emitting module 40 </ b> B according to the present embodiment does not include the wire 20 when compared with the surface emitting module 40 according to the first embodiment, and is turned back. 35 is different in that a locked portion 60 is provided and a locking portion 62 for mounting the surface emitting module 40B is provided on the attached object 200 side, and other configurations are substantially the same. For example, a magnet is used as the locked portion 60 and the locking portion 62.

  The locked portion 60 is provided in a portion corresponding to the ear portion 35 on the front surface of the sealing member 30. The locked portion 60 is fixed to the front surfaces of the first region 35a and the second region 35b of the folded ear portion 35 by adhesion or the like.

  The first region 35 a and the second region 35 b of the folded ear portion 35 are arranged so that no gap is formed between the back surface of the first region 35 a and the second region 35 b and the back surface of the covering portion 34. It is being fixed to the coating | coated part 34 from the folding position to. For this reason, a space for inserting the wire 20 in the first embodiment is not formed, but the locked portion 60 is locked to the locking portion 62 in a state where the ear portion 35 is folded as will be described later. Thereby, the front surface of the ear | edge part 35 which opposes the to-be-attached object 200 at the time of attachment corresponds to the attachment area | region which concerns on Embodiment 1. FIG. A locked portion 60 is provided in a portion corresponding to the attachment region on the front surface of the ear portion 35.

  The surface emitting module 40 according to the present embodiment is manufactured according to the method for manufacturing the surface emitting module according to the first embodiment. In this case, instead of the step of inserting the wire into the surface emitting module, a step of fixing the locked portion 60 to the front surface of the folded ear portion 35 is performed. The locked portion 60 may be fixed to the front surface of the ear portion 35 before the ear portion 35 is folded back and after the light emitting element 10 is sealed by the sealing member 30.

  As shown in FIG. 15, when the lighting device 100 </ b> B is configured by tiling a plurality of surface emitting modules 40 </ b> B in a matrix, the base member 61 provided with the locking portions 62 is previously attached to the attachment 200. Install. The locking part 62 can detachably lock the locked part 60.

  The base member 61 is, for example, a flexible film or sheet member. The base member 61 is fixed along the installation surface 201 using, for example, a tape, an adhesive, and a fastener. The locking part 62 is provided at a position corresponding to the locked part 60. The locking part 62 is fixed to the base member 61 using, for example, a tape or an adhesive.

  The locked portion 60 is locked to the locking portion 62 by bringing the surface emitting module 40B close to the attachment object 200 along the arrow in the figure. Specifically, the locked portion 60 is attracted and fixed to the locking portion 62 by the attractive force of the magnet. Thus, the surface emitting module 40B is attached to the attachment object 200.

  Thus, the attachment member is configured by the locked portion 60 that can be locked to the locking portion 62 provided on the attached object 200 side. The locked portion 60 and the locking portion 62 have a simple configuration in which the magnet is only fixed to the sealing member 30 or the base member 61. Further, by folding the ear portion 35, the attachment region is formed in a state where the thickness of the surface emitting module is kept thin. For this reason, also in the present embodiment, as in the first embodiment, it is possible to reduce the thickness, and it can be easily installed on an object to be attached having a curved surface. Unevenness can be suppressed.

  The locked portion 60 is provided on the ear portion 35 that is folded back and fixed to the covering portion 34. Compared with the case where the locked portion is provided on the back surface of the covering portion 34 where the ear portion 35 does not overlap, the locked portion 60 is provided at a portion where the thickness of the surface emitting module 40B is increased and reinforced. It becomes. Thereby, when removing the surface emitting module 40B, durability against stress applied to the boundary between the locked portion 60 and the sealing member 30 is improved.

  As a result, it is possible to prevent the surface light emitting module 40 from being damaged at the boundary between the locked portion 60 and the sealing member 30 when the surface light emitting module 40B is removed. In particular, when the light emitting surface module is thinned, the overall rigidity is lowered. Therefore, by providing the locked portion 60 at the above position, such an effect is remarkably exhibited.

(Embodiment 4)
FIG. 16 is a plan view showing the back surface of the surface emitting module according to the present embodiment. With reference to FIG. 16, the surface emitting module 40C according to the present embodiment will be described.

  As shown in FIG. 16, the surface emitting module 40C according to the present embodiment is replaced with a magnet in the locking portion 62 and the locked portion 60C when compared with the surface emitting module 40B according to the third embodiment. The other difference is that the snap button is used, and other configurations are almost the same. A hook-and-loop fastener or the like may be used instead of the snap button. Further, the surface emitting module 40C according to the present embodiment is manufactured according to the method for manufacturing the surface emitting module according to the third embodiment.

  Even with such a configuration, substantially the same effects as those of the surface emitting module 40B according to Embodiment 3 can be obtained.

  In Embodiments 1 to 4 described above, the case where the number of the light emitting elements 10 is three has been described as an example. However, the present invention is not limited to this and may be one or two, or four or more. It may be.

  In the first to fourth embodiments described above, the case where the light emitting element 10 is a so-called bottom emission type organic EL element has been described as an example. However, the present invention is not limited thereto, and the top emission type organic EL element is used. It may be. The light emitting element 10 may be composed of a plurality of light emitting diodes (LEDs) and a diffusion plate, or may be composed of a cold cathode tube or the like.

  In Embodiments 1 and 2 described above, the case where the tip end portion of the folded ear portion 35 is fixed to the covering portion 34 has been described as an example, but the folded state can be maintained without being fixed. In other words, the distal end portion of the ear portion 35 may not be fixed to the covering portion 34.

  Although the embodiments of the present invention have been described above, the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, and includes meanings equivalent to the terms of the claims and all modifications within the scope.

  2 Light source part, 10 Light emitting element, 11 Transparent base material, 11a Light emitting surface, 12 Barrier layer, 13 Anode, 14 Organic layer, 15 Cathode, 16 Sealing layer, 17 Insulating layer, 18, 19 Electrode part, 20 Wire, 30 Sealing member, 31a, 31b end, 33a, 33b attachment region, 34 covering portion, 35 ear portion, 35a first region, 35b second region, 35c third region, 35d fourth region, 36 first sealing portion 37 Second sealing part, 40, 40A, 40B, 40BF, 40C Surface emitting module, 60, 60C Locked part, 61 Base member, 62 Locking part, 100, 100B Lighting device, 200 Attachment object, 201 Installation surface.

Claims (7)

A surface emitting module to be attached to an attached object,
A planar light source unit composed of a single light emitting element or a plurality of light emitting elements arranged in a plane,
A sealing member having a front surface and a back surface and capable of bending deformation to seal the light emitting element so that the light source portion is embedded therein;
An attachment member for attaching the sealing member to an attachment;
The sealing member includes a covering portion that covers the light source portion, and an ear portion that is positioned around the covering portion,
The light emitting element has a light emitting surface on the front surface side of the sealing member so that light is emitted from the front surface side of the sealing member,
Of the back surface of the sealing member, between the covering portion and the ear portion, the portion corresponding to the ear portion is opposed to the portion corresponding to the covering portion of the back surface of the sealing member. A surface-emitting module in which the ear portion is folded in the vicinity of the boundary portion, whereby an attachment region for attachment to an attachment object via the attachment member is formed by the ear portion.   The surface emitting module according to claim 1, wherein the light emitting element is bendable.   The surface emitting module according to claim 1, wherein the folded ear portion is fixed to the covering portion to form a cylindrical space with the covering portion. The attachment member is a wire or a band-shaped member,
The wire or the band-shaped member is inserted into a cylindrical space formed between the folded ear portion and the covering portion, and the wire or the band-shaped member is fixed to an attachment. The surface emitting module according to any one of claims 1 to 3, wherein the surface emitting module is attached to an attachment. The mounting member is configured by a locked portion that can be locked to a locking portion provided on the mounted object side,
The said locked part is provided in the part applicable to the said attachment area | region among the front surfaces of the said ear | edge part of the said sealing member, and the said locked part is locked by the said locking part The surface emitting module according to any one of claims 1 to 3, wherein the surface emitting module is attached to an attachment.   The surface emitting module according to claim 5, wherein the locked portion is detachably locked to the locking portion. The light-emitting element includes a transparent substrate, a barrier layer, an anode, an organic layer, and a cathode, which are sequentially laminated on the main surface of the transparent substrate located on the side opposite to the light-emitting surface, the anode, and the organic And a sealing layer for sealing the cathode,
The organic layer is formed so as to be located inside the barrier layer in plan view,
The barrier layer is disposed at a central portion in the thickness direction of the surface emitting module,
The surface emitting module according to claim 1, wherein the sealing member is folded back at a portion outside the organic layer and including the barrier layer when seen in a plan view.

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