JPWO2017038495A1 - LIGHTING DEVICE AND LIGHTING DEVICE MANUFACTURING METHOD - Google Patents

Abstract

The lighting device (100) includes a plurality of surface light emitting elements (10) and a sealing member (20) for sealing the plurality of surface light emitting elements (10), and the plurality of surface light emitting elements (10) include: The surfaces (10a) of each are arranged in a matrix so that they face the same side, and are arranged so that the ends thereof overlap each other, and the sealing member (20) is a surface (10a) of the surface light emitting device (10). ) Side is substantially flat, and on the back surface (10b) side of the surface light emitting element (10), the surface (10a) of the surface light emitting element (10) faces in a portion where the two surface light emitting elements (10) overlap. Raises in the opposite direction.

Description

  The present invention relates to a lighting device including a plurality of surface light emitting elements and a method for manufacturing the lighting device.

  As a document disclosing an illuminating device formed by arranging a plurality of surface light emitting elements in a matrix so that peripheral edges of adjacent surface light emitting elements overlap each other, for example, Japanese Patent Application Laid-Open No. 2001-126871 (patent) Reference 1) may be mentioned.

  In the illumination device disclosed in Patent Document 1, one surface light emitting element is superimposed on a part of the peripheral portion of the other surface light emitting element at a joint between adjacent EL sheets (surface light emitting elements). The peripheral electrode in which at least a portion overlapping with the other surface light emitting element is a non-light emitting region is omitted, and light is emitted to the edge. With this configuration, it is possible to emit light from the entire surface without generating a non-light emitting region at the joint.

JP 2001-126871 A

  However, the illumination device disclosed in Patent Document 1 is not sufficiently resistant to oxygen and moisture when used outdoors or in a high-temperature and high-humidity environment, and it is difficult to ensure reliability.

  In addition, when only a plurality of surface light emitting elements are arranged in an overlapping manner, when these are handled as devices and are collectively incorporated into a device, one of the surface light emitting elements may be separated, making it difficult to handle. It becomes.

  Here, in order to improve the reliability and handleability of an illumination device configured by arranging a plurality of surface light emitting elements, it is conceivable that the plurality of surface light emitting elements are entirely sealed with a sealing member. .

  However, simply sealing a plurality of surface light emitting elements with the sealing member as a whole causes the surface of the sealing member to be undulated by arranging the surface light emitting elements adjacent to each other so as to overlap each other.

  In such a case, the emitted light emitted from the surface light emitting element is emitted in an unintended direction due to surface undulations when propagating through the sealing member and emitted from the sealing member. End up. As a result, luminance unevenness occurs and a good light emission state cannot be obtained.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to improve reliability and handleability in an illumination device configured such that peripheral portions of a plurality of surface light emitting elements overlap each other. It is excellent in providing the illuminating device which can suppress the radiation | emission in the direction which is not intended in the part which several surface emitting elements overlap, and the manufacturing method of the illuminating device.

  An illuminating device according to the present invention includes a front surface and a rear surface, a light emitting surface for emitting light on the front surface, and a plurality of flexible surface light emitting elements and the plurality of surface light emitting elements as a whole. And the plurality of surface light emitting elements are arranged in a matrix so that the surfaces of each of the plurality of surface light emitting elements face the same side, and end portions thereof overlap each other. The sealing member is configured to transmit light emitted from the light emitting surface on the surface side of the plurality of surface light emitting elements, and is substantially flat, and the plurality of surfaces On the back side of the light emitting element, the surface of the surface light emitting element protrudes in a direction opposite to the direction in which the two surface light emitting elements adjacent to each other overlap.

  The manufacturing method of the illuminating device based on this invention WHEREIN: The surface light emitting element which has a light emission surface on the surface, and has flexibility WHEREIN: Each said surface of the said some surface light emitting element faces the flat mounting surface. A step of placing the plurality of surface light emitting elements in a matrix on the placement surface such that the end portions overlap with each other, and a state in which the plurality of surface light emitting elements are placed on the placement surface. The step of pressurizing the plurality of surface light emitting elements while maintaining, and the plurality of surface light emitting elements arranged in a matrix with a sealing member so as to transmit light emitted from the light emitting surface And a step of sealing.

  According to the present invention, in an illuminating device configured such that the peripheral portions of a plurality of surface light emitting elements overlap each other, the light emitting device is excellent in reliability and handleability, and emits in an unintended direction at a portion where the plurality of surface light emitting elements overlap. It is possible to provide a lighting device and a method for manufacturing the lighting device.

FIG. 3 is a plan view of a surface light emitting element provided in the lighting apparatus according to Embodiment 1. It is sectional drawing along the II-II line | wire shown in FIG. 1 is a sectional view of a lighting device according to Embodiment 1. FIG. FIG. 3 is a flowchart showing a manufacturing flow of the lighting apparatus according to Embodiment 1. It is a figure which shows the back state of the process of mounting the several surface emitting element shown in FIG. It is sectional drawing of the illuminating device which concerns on Embodiment 2. FIG. 6 is a cross-sectional view of a lighting device according to Embodiment 3. FIG. FIG. 10 is a flowchart showing a manufacturing flow of the lighting device according to Embodiment 3. It is a figure which shows the back state of the process of mounting the several surface emitting element shown in FIG. It is sectional drawing of the illuminating device which concerns on Embodiment 4. FIG. FIG. 10 is a flowchart showing a manufacturing flow of a lighting device according to Embodiment 4. It is a figure which shows the 1st process of the process of sealing the some surface emitting element shown in FIG. 11 entirely. It is a figure which shows the 2nd process of the process of sealing the some surface emitting element shown in FIG. 11 entirely.

  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.

(Embodiment 1)
(Surface emitting device)
FIG. 1 is a plan view of a surface light emitting element provided in the lighting apparatus according to the present embodiment. FIG. 2 is a cross-sectional view taken along the line II-II shown in FIG. With reference to FIG. 1 and FIG. 2, the surface light emitting element 10 provided in the lighting apparatus according to the present embodiment will be described.

  As shown in FIGS. 1 and 2, the surface light emitting element 10 is composed of, for example, an organic EL element. The surface light emitting element 10 has flexibility. The surface light emitting device 10 includes a transparent substrate 12, an anode 13, an organic layer 14, a cathode 15, a sealing layer 16, and an insulating layer 17.

  The surface light emitting element 10 includes a front surface 10a and a back surface 10b. The surface 10 a of the surface light emitting element 10 is constituted by the main surface of the transparent substrate 12 located on the side opposite to the side where the organic layer 14 is located. The back surface 10b of the surface light emitting element 10 is exposed from the main surface of the sealing layer 16 located on the opposite side to the side where the cathode 15 is located, and opposite to the side where the transparent substrate 12 is located. It is comprised by the main surface of the below-mentioned electrode parts 18 and 19 located in the side, and shall also include the level | step-difference part of the sealing layer 16 and the electrode parts 18 and 19. FIG.

  The transparent substrate 12 is composed of a flexible film substrate such as PET or PC. In addition, the transparent substrate 12 may be comprised with the glass substrate which has flexibility. On the surface of the transparent substrate 12, an anode 13, an organic layer 14, and a cathode 15 are sequentially laminated.

  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 transparent substrate 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 emitting layer) 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 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 12. A part of the anode 13 is exposed from the sealing layer 16 for electrical connection.

  The portion exposed from the sealing layer 16 of the anode 13 (on the left side in FIG. 2) 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 surface light emitting element 10. The portion of the anode 13 exposed from the sealing layer 16 (on the right side in FIG. 2) 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 surface light emitting element 10. The electrode part 18 and the electrode part 19 are located on the opposite sides of the organic layer 14.

  On the surface 10a of the surface light emitting element 10 configured as described above, a light emitting surface R1 from which light is emitted and a non-light emitting surface R2 from which light is not emitted are formed. The portion where the light emitting surface R1 is formed is located on the center side of the surface 10a (light emitting surface) and substantially corresponds to the region where the organic layer 14 is formed. The portion where the non-light emitting surface R2 is formed is located on the outer periphery of the light emitting surface R1 and substantially corresponds to the region where the electrode portions 18 and 19 are formed.

(Lighting device)
FIG. 3 is a cross-sectional view of the lighting apparatus according to the present embodiment. With reference to FIG. 3, the illuminating device 100 which concerns on this Embodiment is demonstrated. In FIG. 3, the anode 13, the cathode 15, and the insulating layer 17 are omitted for convenience.

  As shown in FIG. 3, the illumination device 100 according to the present embodiment includes a plurality of surface light emitting elements 10 and a sealing member 20 that totally seals the plurality of surface light emitting elements 10.

  The plurality of surface light emitting elements 10 are arranged in a matrix in the sealing member 20 so that the surfaces 10 a of each of the plurality of surface light emitting elements 10 face the same side. The plurality of surface light emitting elements 10 may be arranged in one row and two columns as shown in FIG. 3, for example.

  The plurality of surface light emitting elements 10 are arranged so that the end portions overlap each other. Specifically, for example, in the plurality of surface light emitting elements 10, one side in the direction in which two surface light emitting elements 10 adjacent to each other are arranged is the one end 10 c side of the surface light emitting element 10, and the other side is the other side of the surface light emitting element 10. In the case of the end 10d side, the other surface light emitting element of the two surface light emitting elements 10 adjacent to each other on the back surface 10b on the one end 10c side of one surface light emitting element 10A of the two surface light emitting elements 10 adjacent to each other. The surface 10a on the other end 10d side of 10B is arranged so as to overlap.

  At this time, the plurality of surface light emitting elements 10 are arranged in a matrix so that at least a part of the non-light emitting surface R2 overlaps. Thereby, when the several surface light emitting element 10 is arrange | positioned at matrix form, the ratio of a non-light-emitting area | region (non-light-emitting surface R2) can be made small.

  In a state where the plurality of surface light emitting elements 10 are arranged in a matrix, the surface 10a of one surface light emitting element 10A of two surface light emitting elements 10 adjacent to each other overlaps two surface light emitting elements 10 adjacent to each other. Includes an extending portion 10a1 extending flat from the overlapping portion toward the side opposite to the side on which the other surface light emitting element 10B is positioned. Specifically, for example, the surface 10a of one surface light emitting element 10A extends flatly from the one end 10c toward the other end 10d so as to include a region R3 where the other surface light emitting element 10B overlaps. 10a1 is included. In the present embodiment, the extending portion 10a1 is provided from one end 10c to the other end 10d.

  In one surface light emitting element 10A, all of the organic layer 14 is located above the extending portion 10a1. That is, all of the light emitting surface R1 of the one surface light emitting element 10A corresponding to the region where the organic layer 14 is formed is provided in the extending portion 10a1.

  In a state in which the plurality of surface light emitting elements 10 are arranged in a matrix, the surface 10a of the other surface light emitting element 10B has an overlapping portion 10a2 that overlaps the back surface 10b side of the one surface light emitting element 10A, and the extending portion 10a1. The flat part 10a3 located on the same plane and the connection part 10a4 which connects the overlap part 10a2 and the flat part 10a3 are included.

  The flat part 10a3 is located on the one end 10c side. The flat portion 10a3 extends flat with a predetermined range from the one end 10c toward the other end 10d. The flat part 10a3 is located on the same plane as the extending part 10a1.

  The overlapping portion 10a2 is located on the other end 10d side. The overlapping portion 10a2 is a portion located on the back surface 10b side of the one surface light emitting element 10A, and includes a portion that does not directly contact but overlaps the one surface light emitting element 10A through a space.

  The connecting portion 10a4 is a portion that is curved based on a difference in height by placing the other end 10d side of the other surface light emitting element 10B on the back surface 10b of the one surface light emitting element 10A, and is positioned on the other end 10d side. This is a portion from the end of the flat portion 10a3 to reach one surface light emitting element 10A.

  In the other surface light emitting device 10B, a part of the organic layer 14 is positioned above the flat portion 10a3, and the remaining portion is positioned above the connecting portion 10a4. That is, at least a part of the light emitting surface R1 of the other surface light emitting element 10B corresponding to the region where the organic layer 14 is formed is provided in the flat portion 10a3.

  The portion of the organic layer 14 located above the connection portion 10a4 is curved by the connection portion 10a4 being curved. The organic layer 14 located above the flat portion 10a3 has a flat shape.

  Light is emitted from the curved organic layer 14 in a direction inclined from the front direction without being emitted in the front direction (DR1 direction in the drawing). By reducing the ratio of the light emitted from the organic layer 14 in the curved portion, the directivity of the lighting device can be improved and a good light emission state can be obtained.

  For this reason, it is preferable that the ratio of the organic layer 14 in the curved portion with respect to the entire organic layer 14 in the other surface light emitting element 10B is 30% or less. With such a ratio, it is difficult to be recognized as luminance unevenness.

  The sealing member 20 includes a sheet-like first sealing member 21 and a sheet-like second sealing member 22. The first sealing member 21 is disposed on the surface 10 a side of the plurality of surface light emitting elements 10. The 1st sealing member 21 covers the some surface emitting element 10 from the surface 10a side. The first sealing member 21 has high transparency and is configured to transmit light emitted from the light emitting surface R1 of the surface light emitting element 10. The first sealing member 21 preferably has flexibility.

  The second sealing member 22 is disposed on the back surface 10 b side of the plurality of surface light emitting elements 10. The second sealing member 22 covers the plurality of surface light emitting elements 10 from the back surface 10b side. The second sealing member 22 preferably has transparency, but may not have translucency. The second sealing member 22 preferably has flexibility.

  The first sealing member 21 and the second sealing member 22 are joined to each other in a state where the plurality of surface light emitting elements 10 are sandwiched between the first sealing member 21 and the second sealing member 22, so that a plurality of surfaces are obtained. The light emitting element 10 is sealed by the first sealing member 21 and the second sealing member.

  As the first sealing member 21 and the second sealing member 22, a sheet-shaped resin member can be used. Specific materials for the first sealing member 21 and the second sealing member 22 are polyethylene terephthalate, polypropylene, acrylic, polyimide, polysulfone, and the like. As the 1st sealing member 21 and the 2nd sealing member 22, you may use what gave various film formation in order to improve barrier property in addition to these materials.

  The colors of the first sealing member 21 and the second sealing member 22 are not particularly limited, but when both have translucency, the transmittance of the first sealing member 21 and the second sealing member 22 Is preferably 50% or more.

  In order to join the first sealing member 21 and the second sealing member 22, an adhesive layer (not shown) is provided on the inner surfaces of the first sealing member 21 and the second sealing member 22. As the adhesive layer, for example, various materials such as a thermoplastic resin, a thermosetting resin, and an ultraviolet curable resin are used as the adhesive layer.

  The first sealing member 21 and the second sealing member 22 are bonded to each other by the first sealing member 21 and the second sealing member 22 being bonded together by the adhesive layer. The adhesive layer is provided so as to seal the peripheral portions of the first sealing member 21 and the second sealing member 22.

  In addition, by sticking the 1st sealing member 21 and the 2nd sealing member 22 in the state in which the state where the 1st sealing member 21 was flat was maintained, one surface emitting element 10A and the other In the portion where the surface light emitting elements 10B overlap, the surface 10a side of one surface light emitting element 10 is also kept flat. For this reason, the other surface light emitting element 10B in the portion overlapping with one surface light emitting element 10A is in a state of being raised on the side opposite to the direction in which the surface 10a faces.

  Accordingly, the second sealing member 22 protrudes in a direction opposite to the direction in which the surface 10a of the surface light emitting element 10 faces at a portion where two adjacent surface light emitting elements 10 overlap each other.

  As described above, in the lighting device 100 according to the present embodiment, by sealing the plurality of surface light emitting elements 10 with the sealing member 20, resistance to oxygen and moisture is improved, and reliability is improved. To do. Thereby, it becomes possible to install the illuminating device 100 in environments, such as outdoors and high temperature and high humidity.

  In addition, since the plurality of surface light emitting elements 10 are entirely sealed with the sealing member 20, the plurality of surface light emitting elements 10 are prevented from being separated when the lighting device 100 is assembled to a device. The handleability of the device 100 is improved.

  In the illumination device 100 according to the present embodiment, the extending portion 10a1 of one surface light emitting element 10A and the flat portion 10a3 of the other surface light emitting element 10B are positioned on the same plane, The other surface light emitting element 10B in the portion overlapping the surface light emitting element 10A is raised on the side opposite to the direction in which the surface 10a faces.

  For this reason, of the sealing member 20 that seals the plurality of surface light emitting elements 10, the raised portion 23 is provided on the second sealing member 22 located on the back surface 10b side of the plurality of surface light emitting elements 10. The 1st sealing member 21 located in the surface 10a side of the some surface emitting element 10 among the sealing members 20 becomes flat. As a result, when the light emitted from the light emitting surface R1 of the surface light emitting element 10 propagates through the first sealing member 21 and is emitted to the outside, it is caused by the undulation of the surface of the first sealing member 21. Emitting in an unintended direction can be suppressed.

  As described above, the illumination device 100 according to the present embodiment is excellent in reliability and handleability in the illumination device configured such that the peripheral portions of the plurality of surface light emitting elements overlap each other, and the plurality of surface light emitting elements overlap. Emitting in an unintended direction at the portion can be suppressed.

  In addition, each electrode part 18 and 19 of the some surface light emitting element 10 is connected to electricity supply members, such as a flexible printed circuit board and a wiring member which are not illustrated, for example. Connection portions such as electrode lands are drawn out at both ends of each surface light emitting element by the energizing member. The connecting portion is provided so as to be exposed from the sealing member 20. By connecting a lead wire to the connecting portion with a conductive adhesive or the like, a wiring to the outside can be taken out, and by applying a current to the wiring, each surface light emitting element 10 emits light.

(Manufacturing method of lighting device)
FIG. 4 is a flowchart showing a manufacturing flow of the lighting device according to the present embodiment. FIG. 5 is a diagram showing a state after the step of placing the plurality of surface light emitting elements shown in FIG. With reference to FIG. 4 and FIG. 5, the manufacturing method of the illuminating device 100 which concerns on this Embodiment is demonstrated.

  As shown in FIG. 4, when manufacturing the illuminating device 100, the surface emitting element 10 is first prepared in a process (S1). Specifically, a plurality of surface light-emitting elements 10 including a front surface 10a and a rear surface 10b, having a light emitting surface R1 for emitting light on the front surface 10a, and having flexibility are prepared.

  Subsequently, in the step (S2), the plurality of surface light emitting elements 10 are mounted in a matrix on a flat mounting surface. Specifically, for example, a plurality of surface light emitting elements are placed on the mounting surface such that the respective surfaces 10a of the plurality of surface light emitting elements face a flat mounting surface to be described later so that the ends thereof overlap each other. A plurality of surface light emitting elements 10 are mounted in a matrix.

  More specifically, when one side in the direction in which two adjacent surface light emitting elements 10 are arranged is the one end 10 c side of the surface light emitting element 10 and the other side is the other end 10 d side of the surface light emitting element 10, Of the two surface light emitting elements 10 adjacent to each other, the surface 10a on the other end 10d side of the other surface light emitting element 10B of the two surface light emitting elements 10B adjacent to each other is disposed on the back surface 10b on the one end 10c side of the one surface light emitting element 10. The plurality of surface light emitting elements 10 are mounted in a matrix on the mounting surface with the surface 10a of each of the plurality of surface light emitting elements 10 facing the flat mounting surface.

  In the present embodiment, the flat placement surface is the top surface of the first sealing member 21 placed on the base portion 31 having the flat main surface 31a, as shown in FIG. The upper surface of the first sealing member 21 is flat.

  Step (S2) includes step (S21) and step (S22). In the step (S21), the plurality of surface light emitting elements 10 are mounted on the first sealing member 21 that constitutes the mounting surface as described above. Specifically, the plurality of surface light emitting elements 10 are mounted on the first sealing member 21 such that the respective surfaces 10 a of the plurality of surface light emitting elements 10 face the first sealing member 21.

  At this time, as described above, of the two surface light emitting elements 10 adjacent to each other, the other surface light emitting element of the two surface light emitting elements 10 adjacent to each other is disposed on the back surface 10b on the one end 10c side of the one surface light emitting element 10A. The plurality of surface light emitting elements 10 are mounted in a matrix on the first sealing member 21 so that the surface 10a on the other end 10d side of 10A overlaps.

  Further, at least a part of the light emitting surface R1 (see FIG. 3) of one surface light emitting element 10A is positioned on a flat mounting surface, and at least the light emitting surface R1 (see FIG. 3) of the other surface light emitting element 10B. The plurality of surface light emitting elements 10 are placed on the first sealing member 21 so that a part thereof is located on a flat placement surface.

  In the step (S <b> 22), the plurality of surface light emitting elements 10 are covered with the second sealing member 22 from the side opposite to the side where the first sealing member 21 is located when viewed from the plurality of surface light emitting elements 10.

  Next, in the step (S3), the plurality of surface light emitting elements 10 are pressurized. Specifically, the plurality of surface light emitting elements 10 are pressurized while maintaining the state where the plurality of surface light emitting elements 10 are placed on the placement surface. More specifically, in a state where the plurality of surface light emitting elements 10 are sandwiched between the first sealing member 21 and the second sealing member 22, the first sealing member 21, the plurality of surface light emitting elements 10, and the first 2 The sealing member 22 is pressurized.

  In the present embodiment, step (S3) includes step (S4). In the step (S4), the plurality of surface light emitting elements 10 are entirely sealed. Specifically, the plurality of surface light emitting elements 10 arranged in a matrix by the sealing member are entirely sealed so that light emitted from the light emitting surface R1 of the surface light emitting element 10 can be transmitted.

  In this step (S <b> 3), the plurality of surface light emitting elements 10 are pressurized using the pressure device 30. The pressurizing device 30 includes a base unit 31, a heating unit 32, an exhaust port 33, a blockage preventing unit 34, an enclosure unit 35, a gas introduction port 37, a chamber 39, and a flexible substrate 40.

  The chamber 39 forms a pressurizing chamber 36 together with the base portion 31. A gas inlet 37 is provided in the chamber 39. By introducing gas into the pressurizing chamber 36 from the gas inlet 37, the pressure in the pressurizing chamber 36 increases.

  Base portion 31 has a flat main surface 31a. On the main surface 31 a of the base portion 31, a placement area where the first sealing member 21 and the plurality of surface light emitting elements 10 can be placed is provided. A heating unit 32 is provided in the placement area. The heating part 32 constitutes a part of the main surface 31 a of the base part 31. The heating unit 32 is used when the first sealing member 21 and the second sealing member 22 are thermocompression bonded.

  Further, the base 31 is provided with an exhaust port 33. The exhaust port 33 is provided in a region located outside the placement region. The exhaust port 33 is connected to a decompression device, and exhausts the gas in the decompression chamber 38 through the exhaust port 33. The exhaust port 33 is provided with a blocking prevention part 34.

  On the main surface 31a of the base portion 31 located outside the exhaust port 33, a surrounding portion 35 having a cylindrical shape is provided. The surrounding portion 35 surrounds the first sealing member 21, the plurality of surface light emitting elements 10, and the second sealing member 22. The surrounding portion 35 supports the flexible substrate 40.

  The flexible substrate 40 is placed so as to close the opening surface formed on the upper end side of the surrounding portion 35. A space surrounded by the flexible substrate 40, the surrounding portion 35, and the base portion 31 is a decompression chamber 38. The flexible substrate 40 is bent and deformed toward the base portion 31 when the pressurizing chamber 36 is pressurized and the decompression chamber 38 is decompressed. The flexible substrate 40 is configured to be in close contact with the back surface 10b side of the plurality of surface light emitting elements 10 in a curved state. The flexible substrate 40 is made of, for example, silicon rubber.

  The blocking prevention unit 34 is configured so that the exhaust port 33 and the decompression chamber 38 communicate with each other even when the flexible substrate 40 is bent and deformed and is in close contact with the flexible substrate 40.

  When pressurizing the first sealing member 21, the plurality of surface light emitting elements 10, and the second sealing member 22 using the pressurizing device 30, first, before the flexible substrate 40 is placed. In this state, the first sealing member 21 is placed on the main surface 31 a (the above placement region) of the base portion 31. Subsequently, through the above-described step (S2), the plurality of surface light emitting elements 10 are mounted in a matrix on the first sealing member 21, and the plurality of surface light emitting elements 10 arranged in a matrix are mounted. Cover with the second sealing member 22.

  Next, the flexible substrate 40 is placed on the surrounding portion 35 so as to close the opening surface formed on the upper end side above the surrounding portion 35. The base 39 is covered with the chamber 39, the gas is introduced into the pressurizing chamber 38, and the interior of the decompression chamber 38 is decompressed. Thereby, the flexible substrate 40 is bent and deformed so as to be in close contact with the back surfaces 10 b of the plurality of surface light emitting elements 10 via the second sealing member 22.

  When the second sealing member 22 is pressed toward the first sealing member 21 by the flexible substrate 40, the first sealing member 21 and the second sealing member 22 have a plurality of surface light emission therebetween. Bonding is performed with the element 10 being sandwiched. As a result, the plurality of surface light emitting elements 10 are entirely sealed by the first sealing member 21 and the second sealing member 22.

  Since the main surface 31a of the base 31 is flat, when the second sealing member 22 is pressed toward the first sealing member 21 by the flexible substrate 40, the first sealing member 21 is maintained in a flat state. Even in the portion where one surface light emitting element 10A and the other surface light emitting element 10B overlap, the surface 10a side of one surface light emitting element 10 is maintained flat. For this reason, the other surface light emitting element 10B in the portion overlapping with one surface light emitting element 10A protrudes on the opposite side to the direction in which the surface 10a faces.

  The second sealing member 22 is in close contact with the back surfaces 10b of the plurality of surface light emitting elements 10 so as to follow this, and the second sealing member 22 is a surface where two adjacent surface light emitting elements 10 overlap each other. The light emitting element 10 protrudes in a direction opposite to the direction in which the surface 10a faces.

  As a result, the lighting device 100 according to the present embodiment is manufactured. As described above, lighting device 100 according to Embodiment 1 has a plurality of surface light emitting elements 10 entirely sealed with sealing member 20, thereby improving reliability and handling. .

  Moreover, since the 1st sealing member 21 located in the surface 10a side of the some surface light emitting element 10 is flat, the light radiate | emitted from the light emission surface R1 of the surface light emitting element 10 passes the 1st sealing member 21. FIG. When propagating and exiting to the outside, it is possible to suppress exiting in an unintended direction due to the undulation of the surface of the first sealing member 21.

  As described above, by using the manufacturing method of the lighting device according to the present embodiment, it is excellent in reliability and handleability, and can suppress emission in an unintended direction at a portion where a plurality of surface light emitting elements overlap. Can be manufactured.

  In Embodiment 1 described above, the case where the two surface light emitting elements 10 are arranged in a row has been described as an example, but three or more surface light emitting elements 10 may be arranged in a row. In this case, the plurality of surface light emitting elements 10 include an aspect in which the plurality of surface light emitting elements 10 are arranged so that the shapes of the surface light emitting elements 10B are continuously arranged. In this aspect, the extension part 10a1 of one surface light emitting element corresponds to the flat part 10a3 of the surface light emitting element 10B described above, and a part of the light emitting surface of one surface light emitting element is provided in the extension part. At least a part of the light emitting surface of the other surface light emitting element is provided in the flat portion. Even if configured in this way, substantially the same effect as in the first embodiment can be obtained.

  Further, as another aspect in which three or more surface light emitting elements 10 are arranged in a row, the surface at the end of two surface light emitting elements located at both ends of one surface light emitting element is the back side of one surface light emitting element. There is a mode in which each of the surfaces positioned on both ends of one surface light emitting element overlaps the back side of two surface light emitting elements positioned on both ends.

  Even in such a case, the sealing member is configured to transmit light emitted from the light emitting surface on the front surface side of the plurality of surface light emitting elements, and is substantially flat, and the back surface of the plurality of surface light emitting elements. On the side, the two surface light emitting elements that are adjacent to each other are raised in the direction opposite to the direction in which the surface of the surface light emitting element faces, thereby obtaining substantially the same effect as in the first embodiment.

  In any of the above embodiments, the surface of one of the two surface light emitting elements adjacent to each other is adjacent to each other such that the portion where the two surface light emitting elements adjacent to each other overlap is flat. The surface of the other surface light-emitting element is one surface light-emitting element, including an extension portion that extends flatly from a portion that overlaps the side opposite to the side on which the other surface light-emitting element is located. It includes an overlapping portion that overlaps the back side of the element, a flat portion that is located on the same plane as the extending portion, and a connecting portion that connects the overlapping portion and the flat portion.

(Embodiment 2)
(Lighting device)
FIG. 6 is a cross-sectional view of the lighting apparatus according to the present embodiment. Referring to FIG. 6, illumination device 100A according to the present embodiment has an overlapping state of one surface light emitting element 10A and the other surface light emitting device 10B compared to illumination device 100 according to the first embodiment. Is different.

  In the lighting device 100A, in one surface light emitting element 10A, the entire organic layer 14 is formed above the extending portion 10a1 that extends flat, and in the other surface light emitting element 10B, the flat surface is flat. All of the organic layer 14 is formed above the portion 10a3.

  Thereby, in the illuminating device 100A, all of the light emitting surfaces R1 of one surface light emitting element 10A are provided in the extending portion 10a1, and all of the light emitting surfaces R1 of the other surface light emitting element 10B are flat portions 10a3. Is provided.

  Thus, when the illuminating device 100A is comprised, the effect equivalent to or more than Embodiment 1 is acquired. In particular, since all of the light emitting surface R1 of one surface light emitting element 10A is provided in the extending portion 10a1, and all of the light emitting surface R1 of the other surface light emitting element 10B is provided in the flat portion 10a3, illumination is performed. The directivity of apparatus 100A can be improved.

(Manufacturing method of lighting device)
The manufacturing method of lighting apparatus 100A according to the present embodiment conforms to the manufacturing method of lighting apparatus 100 according to the first embodiment. The manufacturing method of lighting device 100A according to the present embodiment is a step according to step (S2), and a plurality of surface light-emitting elements are placed in a matrix form on the flat placement surface so that the ends overlap each other. In the process, all the light emitting surfaces R1 of one surface light emitting element 10A are positioned on the mounting surface, and all the light emitting surfaces R1 of the other surface light emitting element 10B are positioned on the mounting surface. This is different in that a plurality of surface light emitting elements 10 are mounted. In the other steps, substantially the same processing as that in the manufacturing method of lighting apparatus 100 according to Embodiment 1 is performed. Thereby, 100 A of illuminating devices which concern on Embodiment 2 are manufactured.

(Embodiment 3)
(Lighting device)
FIG. 7 is a cross-sectional view of the lighting apparatus according to the present embodiment. With reference to FIG. 7, the illuminating device 100B which concerns on this Embodiment is demonstrated.

  As illustrated in FIG. 7, the illumination device 100 </ b> B according to the present embodiment is different from the illumination device 100 according to Embodiment 1 in the configuration of the sealing member 20 </ b> B. Other configurations are almost the same.

  The sealing member 20 </ b> B includes a folded portion 25 and is configured by a single transparent sheet-like sealing member 24 that wraps the plurality of surface light emitting elements 10. The sealing member 24 has flexibility. As the sealing member 24, a sheet-shaped resin member can be used. Specific materials for the sealing member 24 include polyethylene terephthalate, polypropylene, acrylic, polyimide, polysulfone, and the like. As the sealing member 24, in addition to these materials, a member that has been subjected to various film formations in order to improve barrier properties may be used.

  The sealing member 20 </ b> B is configured to transmit light emitted from the light emitting surface R <b> 1 on the surface 10 a side of the plurality of surface light emitting elements 10 and is substantially flat. The sealing member 20 </ b> B protrudes in a direction opposite to the direction in which the surface 10 a of the surface light emitting element 10 faces at a portion where the two surface light emitting elements 10 adjacent to each other overlap on the back surface 10 b side of the plurality of surface light emitting elements 10.

  Even when the lighting device 100B is configured in this manner, substantially the same effects as those of the first embodiment can be obtained.

(Manufacturing method of lighting device)
FIG. 8 is a flowchart showing a manufacturing flow of the lighting apparatus according to the present embodiment. FIG. 9 is a diagram showing a state after the step of placing the plurality of surface light emitting elements shown in FIG. With reference to FIG. 8 and FIG. 9, the manufacturing method of the illuminating device 100B which concerns on this Embodiment is demonstrated.

  As shown in FIG. 8, the method for manufacturing lighting device 100 </ b> B according to the present embodiment is based on the method for manufacturing lighting device 100 according to the first embodiment. The manufacturing method of the illuminating device 100B according to the present embodiment, when compared with the manufacturing method of the illuminating device 100 according to the first embodiment, has a plurality of surface light emitting elements 10 on one sheet-like sealing member 24. The sheet-like sealing member 24 is folded back so that the plurality of surface light emitting elements 10 are wrapped, and the sheet-like sealing member 24 is folded back. In this state, the sealing member 24 and the plurality of surface light emitting elements 10 are pressurized, whereby the plurality of surface light emitting elements 10 are totally sealed by the sealing member 24.

  Specifically, in the method for manufacturing lighting device 100B according to the present embodiment, a plurality of surface light emitting elements 10 are prepared in the step (S1) as in the method for manufacturing lighting device 100 according to the first embodiment. .

  Subsequently, in the step (S2A), a plurality of surface light emitting elements are mounted in a matrix form on the flat mounting surface so that the end portions overlap each other. Specifically, when one side in the direction in which two surface light emitting elements 10 adjacent to each other are arranged is the one end 10c side of the surface light emitting element 10 and the other side is the other end 10d side of the surface light emitting element 10, they are adjacent to each other. The surface 10a on the other end 10d side of the other surface light emitting element 10B among the two surface light emitting elements 10B adjacent to each other is on the back surface 10b on the one end 10c side of the one surface light emitting element 10 of the two surface light emitting elements 10 that match. The plurality of surface light emitting elements 10 are mounted in a matrix on the mounting surface with the surface 10a of each of the plurality of surface light emitting elements 10 facing the flat mounting surface so as to overlap.

  In the present embodiment, the flat placement surface is the upper surface of one sheet-like sealing member 24 placed on a base portion 31 having a flat plane, as shown in FIG. . The upper surface of the sealing member 24 is flat.

  Step (S2A) includes step (S21A) and step (S22A). In the step (S21A), the plurality of surface light emitting elements 10 are placed on the single sheet-like sealing member 24 constituting the placement surface as described above. Specifically, the plurality of surface light emitting elements 10 are placed on one sheet-like sealing member 24 so that the respective surfaces 10 a of the plurality of surface light emitting elements 10 face the one sheet-like sealing member 24. Place.

  At this time, as described above, of the two surface light emitting elements 10 adjacent to each other, the other surface light emitting element of the two surface light emitting elements 10 adjacent to each other is disposed on the back surface 10b on the one end 10c side of the one surface light emitting element 10A. A plurality of surface light emitting elements 10 are mounted in a matrix on one sheet-like sealing member 24 so that the surface 10a on the other end 10d side of 10A overlaps.

  In the step (S22A), one sheet-like sealing member 24 is folded back. Specifically, the sheet-like sealing member 24 is folded back so that the plurality of surface light emitting elements 10 are wrapped.

  Next, in the step (S3A), the plurality of surface light emitting elements 10 are pressurized. Specifically, the plurality of surface light emitting elements 10 are pressurized while maintaining the state where the plurality of surface light emitting elements 10 are placed on the placement surface. More specifically, one sheet-shaped sealing member 24 and the plurality of surface light-emitting elements 10 are pressurized in a state where the plurality of surface light-emitting elements 10 are encapsulated by one sheet-shaped sealing member 24. .

  In the present embodiment, step (S3A) includes step (S4A). In the step (S4), the plurality of surface light emitting elements 10 are entirely sealed. Specifically, the plurality of surface light emitting elements 10 arranged in a matrix by the sealing member are entirely sealed so that light emitted from the light emitting surface R1 of the surface light emitting element 10 can be transmitted.

  In the step (S3A), the sheet-like sealing member 24 is used to enclose a plurality of surface light-emitting elements 10 with one sheet-like sealing member 24 as in the first embodiment. The sealing member 24 and the plurality of surface light emitting elements 10 are pressurized.

  Due to the flexible substrate 40, the portion of the sealing member 24 positioned on the back surface 10 b side of the plurality of surface light emitting elements 10 faces toward the portion of the sealing member 24 positioned on the front surface 10 a side of the plurality of surface light emitting elements 10. By being pressed, one sheet-like sealing member 24 is joined in a state of wrapping the plurality of surface light emitting elements 10. As a result, the plurality of surface light emitting elements are entirely sealed by the single sheet-like sealing member 24.

  Since the main surface 31a of the base portion 31 is flat, the sealing member 24 in the portion located on the back surface 10b side of the plurality of surface light emitting elements 10 is covered by the flexible substrate 40 with the surface of the plurality of surface light emitting elements 10. When pressed toward the sealing member 24 side of the portion located on the 10a side, the sealing member 24 located on the surface 10a side of the plurality of surface light emitting elements 10 is maintained in a flat state. .

  Even in the portion where one surface light emitting element 10A and the other surface light emitting element 10B overlap, the surface 10a side of one surface light emitting element 10 is maintained flat. For this reason, the other surface light emitting element 10B in the portion overlapping with one surface light emitting element 10A protrudes on the opposite side to the direction in which the surface 10a faces.

  A portion of the sealing member 24 located on the back surface 10b side of the plurality of surface light emitting elements 10 closely adheres to the back surface 10b of the plurality of surface light emitting elements 10 so as to follow this, and on the back surface 10b side of the plurality of surface light emitting elements 10. The portion of the sealing member 24 that is positioned is raised in a direction opposite to the direction in which the surface 10 a of the surface light emitting element 10 faces at a portion where two adjacent surface light emitting elements 10 overlap.

  As a result, lighting device 100B according to the present embodiment is manufactured. As described above, lighting device 100B according to the present embodiment has a plurality of surface light emitting elements 10 entirely sealed by sealing member 20B (24), thereby improving reliability and handling. Will improve.

  Further, since the portion of the sealing member 20B located on the surface 10a side of the plurality of surface light emitting elements 10 is flat, the light emitted from the light emitting surface R1 of the surface light emitting element 10 propagates through the sealing member 20B. When the light is emitted to the outside, it is possible to prevent the light from being emitted in an unintended direction due to the undulation of the surface of the sealing member 20B at the portion located on the surface 10a side of the plurality of surface light emitting elements 10. .

  As described above, by using the manufacturing method of the lighting device according to the present embodiment, it is excellent in reliability and handleability, and can suppress emission in an unintended direction at a portion where a plurality of surface light emitting elements overlap. Can be manufactured.

(Embodiment 4)
(Lighting device)
FIG. 10 is a cross-sectional view of the lighting apparatus according to the present embodiment. With reference to FIG. 10, the illuminating device 100C which concerns on this Embodiment is demonstrated.

  As illustrated in FIG. 10, the illumination device 100 </ b> C according to the present embodiment is different from the illumination device 100 according to Embodiment 1 in the configuration of the sealing member 20 </ b> C. Other configurations are almost the same.

  The sealing member 20 </ b> C is configured by a transparent resin coating layer 26. The sealing member 20C seals the plurality of surface light emitting elements 10 as a whole. Specifically, the sealing member 20C includes the back surface 10b of the one surface light emitting element 10A and the surface of the other surface light emitting element 10B in the portion where the one surface light emitting element 10A and the other surface light emitting element 10B overlap. The outer surfaces of the plurality of surface light emitting elements 10 excluding 10a are covered without a gap.

  In the portion where one surface light emitting element 10A and the other surface light emitting element 10B overlap, a gap is formed between the back surface 10b of one surface light emitting element 10A and the surface 10a of the other surface light emitting element 10. In this case, the back surface 10b of one surface light emitting element 10A and the surface 10a of the other surface light emitting element 10 in the overlapping portion may be covered without a gap.

  The sealing member 20 </ b> C is configured to be able to transmit light emitted from the light emitting surface R <b> 1 on the surface 10 a side of the plurality of surface light emitting elements 10 and is substantially flat. The sealing member 20 </ b> C protrudes in a direction opposite to the direction in which the surface 10 a of the surface light emitting element 10 faces at a portion where the two surface light emitting elements 10 adjacent to each other overlap on the back surface 10 b side of the plurality of surface light emitting elements 10.

  Even when the lighting device 100C is configured in this manner, substantially the same effects as those of the first embodiment can be obtained.

(Manufacturing method of lighting device)
FIG. 11 is a flowchart showing a manufacturing flow of the lighting apparatus according to the present embodiment. 12 and 13 are views showing a first step and a second step of the step of totally sealing the plurality of surface light emitting elements shown in FIG. With reference to FIGS. 11 to 13, a method for manufacturing lighting device 100 </ b> C according to the present embodiment will be described.

  As shown in FIG. 11, the manufacturing method of lighting device 100 </ b> C according to the present embodiment is compared with the manufacturing method of lighting device 100 according to the first embodiment after the step of pressurizing the plurality of surface light emitting elements. The point that the step of totally sealing the plurality of surface light emitting elements is performed is different from the processing that is performed in the step of totally sealing the plurality of surface light emitting elements.

  In the manufacturing method of lighting device 100C according to the present embodiment, a plurality of surface light emitting elements 10 are prepared in the step (S1), similarly to the manufacturing method of lighting device 100 according to the first embodiment.

  Subsequently, in the step (S2), a plurality of surface light emitting elements are mounted in a matrix form such that the end portions thereof overlap each other on a flat mounting surface. Specifically, when one side in the direction in which two surface light emitting elements 10 adjacent to each other are arranged is the one end 10c side of the surface light emitting element 10 and the other side is the other end 10d side of the surface light emitting element 10, they are adjacent to each other. The surface 10a on the other end 10d side of the other surface light emitting element 10B among the two surface light emitting elements 10B adjacent to each other is on the back surface 10b on the one end 10c side of the one surface light emitting element 10 of the two surface light emitting elements 10 that match. The plurality of surface light emitting elements 10 are mounted in a matrix on the mounting surface with the surface 10a of each of the plurality of surface light emitting elements 10 facing the flat mounting surface so as to overlap.

  In the present embodiment, the flat placement surface is the flat main surface 31a of the base portion 31 of the pressure device 30 according to the first embodiment.

  Next, in the step (S3), the plurality of surface light emitting elements 10 are pressurized. Specifically, the plurality of surface light emitting elements 10 are pressurized while maintaining the state where the plurality of surface light emitting elements 10 are placed on the placement surface.

  In the step (S3), the plurality of surface light emitting elements 10 are pressurized using the pressure device 30 as in the first embodiment. The plurality of surface light emitting elements 10 are integrated by pressing the back surfaces 10 b of the plurality of surface light emitting elements 10 toward the front surface 10 a side of the plurality of surface light emitting elements 10 by the flexible substrate 40.

  Since the main surface 31a of the base portion 31 is flat, when the back surfaces 10b of the plurality of surface light emitting elements 10 are pressed against the surface 10a side of the plurality of surface light emitting elements 10 by the flexible substrate 40, The surface 10a of the plurality of surface light-emitting elements 10 at the portion in contact with the main surface 31a of the base portion 31 is maintained in a flat state. Thereby, the other surface light emitting element 10B in the portion overlapping with one surface light emitting element 10A is raised on the opposite side to the direction in which the surface 10a faces.

  Subsequently, in the step (S4B), the plurality of surface light emitting elements 10 are entirely sealed. Specifically, the plurality of surface light emitting elements 10 arranged in a matrix by the sealing member are entirely sealed so that light emitted from the light emitting surface R1 of the surface light emitting element 10 can be transmitted.

  Step (S4B) includes step (S41) and step (S42). In the step (S41), as shown in FIG. 12, the plurality of surface light emitting elements 10 pressed in the step of pressing the plurality of surface light emitting elements 10 are covered with a resin coating agent.

  Specifically, the plurality of surface light emitting elements 10 that are pressurized and integrated are immersed in the liquid resin 20 </ b> D as a resin coating agent stored in the storage tank 50.

  The liquid resin 20D includes a curable compound (monomer or oligomer) that is reactively cured by heating or irradiation with active energy rays (for example, ultraviolet rays or visible light), and a cured resin layer is formed by curing the curable compound. Is. The liquid resin 20D preferably contains the curable compound and a polymerization initiator. As the liquid resin 20D, a thermosetting resin, a photocurable resin, a two-component mixed resin, or the like can be used.

  As the thermosetting resin, for example, an epoxy resin, a polyurethane resin, a silicone resin, a polyester resin, or the like can be used. As the photocurable resin, for example, an acrylate resin or the like can be employed. As the two-component mixed resin, it is possible to employ a resin in which a curing agent is mixed with the main component of the thermosetting resin or the photocurable resin.

  In the step (S42), a resin coating agent that covers the plurality of surface light emitting elements 10 is polymerized to form a transparent resin coating layer. In the step (S42), a case where a thermosetting resin is employed as the liquid resin 20D will be described.

  Specifically, as shown in FIG. 13, the plurality of integrated surface light emitting elements 10 are pulled up from the liquid resin 20 </ b> D, and the heat source 90 is used to cover the plurality of integrated surface light emitting elements 10. The liquid resin 20D is heated. The heated liquid resin 20D becomes a resin coating layer 26 (sealing member 20C) by being polymerized and cured.

  In addition, when using photocurable resin as liquid resin 20D, light irradiation apparatus, such as UV lamp, is used to light-irradiate liquid resin 20D which coat | covers the several surface emitting element 10 integrated. Thereby, the liquid resin 20 </ b> D is polymerized and cured to form the resin coating layer 26.

  Since the liquid resin 20D covers the plurality of surface light emitting elements 10 along the outer surfaces of the plurality of surface light emitting elements 10 integrated, the liquid resin 20D is substantially flat on the surface 10a side of the plurality of surface light emitting elements 10. Become. On the other hand, the liquid resin 20D has, on the back surface 10b side of the plurality of surface light emitting elements 10, a direction in which the surface 10a of the surface light emitting element 10 faces in a portion where one surface light emitting element 10A and the other surface light emitting element 10B overlap. Raise to the other side.

  Thereby, the resin coating layer 26 formed by curing the liquid resin 20 </ b> D is substantially flat on the surface 10 a side of the plurality of surface light emitting elements 10. On the other hand, on the back surface 10b side of the plurality of surface light emitting elements 10, the resin coating layer 26 protrudes on the side opposite to the direction in which the surface 10a faces in the portion where one surface light emitting element 10A and the other surface light emitting element 10B overlap. To do.

  Through the steps as described above, lighting device 100C according to the present embodiment is manufactured. As described above, lighting device 100C according to the present embodiment is improved in reliability by sealing a plurality of surface light emitting elements 10 entirely with sealing member 20C (resin coating layer 26). , Handling is improved.

  Further, since the portion of the sealing member 20C located on the surface 10a side of the plurality of surface light emitting elements 10 is flat, the light emitted from the light emitting surface R1 of the surface light emitting element 10 propagates through the sealing member 20C. When the light is emitted to the outside, it is possible to prevent the light from being emitted in an unintended direction due to the undulation of the surface of the sealing member 20 </ b> C located on the surface 10 a side of the plurality of surface light emitting elements 10. .

  As described above, by using the manufacturing method of the lighting device according to the present embodiment, it is excellent in reliability and handleability, and can suppress emission in an unintended direction at a portion where a plurality of surface light emitting elements overlap. Can be manufactured.

  In the above-described embodiment, in the step (S41), the plurality of integrated surface light emitting elements 10 are immersed in the liquid resin 20D, thereby integrating the plurality of integrated surface light emitting elements 10 with the resin coating agent. However, the present invention is not limited to this, and the plurality of surface light emitting elements 10 may be coated with a resin coating agent using a spray method or a dispenser method.

[Other variations]
The above-described idea can be applied to the case where the surface light emitting element is composed of a top emission type organic EL, and also to the case where the surface light emitting element is composed of a bottom emission type organic EL. The above idea can also be applied to the case where the surface light emitting element 10 is composed of an inorganic EL element, and the surface light emitting element is arranged on a plurality of light emitting diodes (LEDs) and on the emission surface side of the plurality of light emitting diodes. The present invention can also be applied to a case where the surface light emitting element is configured using a cold cathode tube or the like.

  The illuminating device based on this invention demonstrated above has the light emitting surface which radiate | emits light on the said surface including the surface and the back surface, and has a plurality of surface light emitting elements which have flexibility, and the said several surface light emitting element as a whole. And the plurality of surface light emitting elements are arranged in a matrix so that the surfaces of each of the plurality of surface light emitting elements face the same side, and end with respect to each other. The sealing member is configured to transmit light emitted from the light emitting surface on the surface side of the plurality of surface light emitting elements, and is substantially flat, On the back surface side of the plurality of surface light emitting elements, the surface light emitting element protrudes in a direction opposite to the direction in which the surface of the surface light emitting element faces in a portion where the two adjacent surface light emitting elements overlap.

  In the illuminating device according to the present invention, the surface of one of the two surface light emitting elements adjacent to each other is flat so that the portion where the two adjacent surface light emitting elements overlap is flat. Preferably, the second surface light emitting element includes an extending portion that extends flatly from the overlapping portion toward the side opposite to the side where the other surface light emitting element is located among the two surface light emitting elements adjacent to each other. The surface of the light emitting element includes an overlapping portion overlapping the back surface side of the one surface light emitting element, a flat portion located on the same plane as the extending portion, and a connecting portion connecting the overlapping portion and the flat portion. It is preferable to contain.

  In the lighting device surface according to the present invention, at least a part of the light emitting surface of the one surface light emitting element may be provided in the extending portion, and the light emission of the other surface light emitting element. At least a part of the surface may be provided on the flat portion.

  In the lighting device surface according to the present invention, it is preferable that all of the light emitting surfaces of the one surface light emitting element are provided in the extending portion, and the light emitting surface of the other surface light emitting element. All of the above are preferably provided in the flat portion.

  In the lighting device according to the present invention, the sealing member includes a transparent sheet-shaped first sealing member disposed on the surface side of the plurality of surface light emitting elements, and the plurality of surface light emitting elements. And a sheet-like second sealing member disposed on the back surface side.

  In the illumination device according to the present invention, the sealing member may include a folded portion, and may be configured by a single transparent sheet-shaped sealing member that wraps the plurality of surface light emitting elements.

  In the illuminating device based on the said invention, the said sealing member may be comprised by the transparent resin coating layer.

  In the manufacturing method of the lighting device according to the present invention described above, a plurality of surface light emitting elements having a light emitting surface and a flexibility are provided, and the surface of each of the surface light emitting elements is flat. And placing the plurality of surface light emitting elements in a matrix on the placement surface so that the end portions overlap each other, and the plurality of surface light emitting elements are placed on the placement surface. The plurality of surface light emitting elements arranged in a matrix by a sealing member so as to transmit light emitted from the light emitting surface while maintaining the above state. And a step of entirely sealing.

  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 changes within the scope.

  10, 10A, 10B Surface light emitting element, 10a surface, 10a1 extension part, 10a2 overlapping part, 10a3 flat part, 10a4 connection part, 10b back surface, 10c one end, 10d other end, 12 transparent substrate, 13 anode, 14 organic layer, 15 cathode, 16 sealing layer, 17 insulating layer, 18, 19 electrode portion, 20, 20B, 20C sealing member, 20D liquid resin, 21 first sealing member, 22 second sealing member, 23 raised portion, 24 Sealing member, 25 folded portion, 26 resin coating layer, 30 pressure device, 31 base portion, 31a main surface, 32 heating portion, 33 exhaust port, 34 blockage prevention portion, 35 enclosure portion, 36 pressure chamber, 37 gas inlet port, 38 decompression chamber, 39 chamber, 40 flexible substrate, 50 storage tank, 90 heat source, 100, 100A, 100B, 100C lighting device.

Claims (8)

A plurality of surface light-emitting elements including a front surface and a back surface, having a light emitting surface for emitting light on the front surface, and having flexibility;
A sealing member that seals the plurality of surface light emitting elements as a whole,
The plurality of surface light emitting elements are arranged in a matrix so that the surfaces of each of the plurality of surface light emitting elements face the same side, and are arranged so that ends thereof overlap each other.
The sealing member is configured to transmit light emitted from the light emitting surface on the front surface side of the plurality of surface light emitting elements and is substantially flat, and the back surface of the plurality of surface light emitting elements On the side, a lighting device that protrudes in a direction opposite to a direction in which the surface of the surface light emitting element faces at a portion where two surface light emitting elements adjacent to each other overlap. Of the two surface light emitting elements adjacent to each other, the surface of one of the surface light emitting elements adjacent to each other is flattened so that a portion where the two surface light emitting elements adjacent to each other overlap is flat. Including an extending portion that extends flatly from the overlapping portion toward the side opposite to the side on which the other surface light emitting element is located;
The surface of the other surface light emitting element is connected to the overlapping portion overlapping the back surface side of the one surface light emitting element, the flat portion located on the same plane as the extending portion, and the overlapping portion and the flat portion. The illuminating device of Claim 1 containing the connection part to do. At least a part of the light emitting surface of the one surface light emitting element is provided in the extending portion,
The lighting device according to claim 2, wherein at least a part of the light emitting surface of the other surface light emitting element is provided in the flat portion. All of the light emitting surface of the one surface light emitting element is provided in the extending portion,
The lighting device according to claim 3, wherein all of the light emitting surface of the other surface light emitting element is provided in the flat portion.   The sealing member includes a transparent sheet-shaped first sealing member disposed on the front surface side of the plurality of surface light emitting elements and a sheet-shaped first sealing member disposed on the back surface side of the plurality of surface light emitting elements. The lighting device according to claim 1, comprising two sealing members.   The said sealing member is a lighting of any one of Claim 1 to 4 comprised by the sheet-like sealing member of the transparent sheet | seat which includes a folding | turning part and wraps around these surface emitting elements. apparatus.   The lighting device according to claim 1, wherein the sealing member is configured by a transparent resin coating layer. A plurality of surface light emitting elements having a light emitting surface on the surface and having flexibility, the surface of each of the plurality of surface light emitting elements is directed to a flat mounting surface, and the end portions thereof are overlapped with each other. Placing the plurality of surface light emitting elements in a matrix on a placement surface;
Pressurizing the plurality of surface light emitting elements while maintaining the state where the plurality of surface light emitting elements are placed on the placement surface;
A step of totally sealing the plurality of surface light emitting elements arranged in a matrix with a sealing member so that light emitted from the light emitting surface can be transmitted.

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