JP2009244501A - Double-sided light emitting display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double-sided light emitting display device capable of improving heat discharge performance without increasing a thickness of a light emitting display part too much even when two surface light emitting panel members are used. <P>SOLUTION: A predetermined spacing L is set between the heat sinks 27 and 29 of first and second surface light emitting panel members 13 and 15 to prevent transfer of heat between the two surface light emitting panel members 13 and 15. The heat sinks 27 and 29 of the first and second light emitting panel members 13 and 15 are brought into contact with, among first to fourth metal frame materials 35 to 41 constituting a frame structure 17, at least the first frame material 35 closest to a heat generation source and the second frame material 37 facing the first frame material 35. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a double-sided light emitting display device having light emitting display surfaces on both the front and back surfaces of a frame-like structure.

  Utility Model Registration No. 3101018 [Patent Document 1] holds a light source composed of a plurality of light emitting diodes, a display plate composed of transparent plastic for guiding light from the light source, and one side of the display plate from the thickness direction. There is shown a guide light (double-sided light emitting display device) including a holding unit that has a light source holding unit that holds a plurality of light emitting diodes arranged side by side along a side surface of one side of the held display plate. .

  Japanese Patent Application Laid-Open No. 2006-11101 [Patent Document 2] discloses a light guide plate that is integrally formed in a state in which a transparent plate is disposed on both sides of a reflection sheet whose both surfaces are reflection surfaces. A plurality of light emitting diodes (LEDs) used as light sources arranged along a side surface of one side of the light guide plate, and a translucent front plate made of milky white acrylic resin arranged on the front and back sides of the light guide plate; There is provided a double-sided light emitting display device in which a surface light emitting display plate composed of a back plate and a water stop material (sealing material) provided over the entire circumference between the front plate and the back plate is held by a metal frame. It is disclosed. In this apparatus, heat generated from a light source is radiated from a frame made of a metal angle member having high thermal conductivity.

  Furthermore, Japanese Patent Application Laid-Open No. 2004-271734 [Patent Document 3] holds one side of a translucent panel with a light emitter mounting member made of an extruded product of an aluminum alloy that holds a light source made up of a plurality of light emitting diodes. A double-sided light emitting display device is disclosed. This publication discloses that it is effective to use a light emitter mounting member that can promote heat dissipation of the light emitting diode because the life of the light emitting diode is shortened when the temperature of the light emitting diode rises.

  Japanese Patent Application Laid-Open No. 2007-258089 [Patent Document 4] discloses a technique for dissipating heat from a light emitting diode by using a member with high heat dissipation as part of a housing for housing a surface light emitting panel. Yes.

  Further, Japanese Patent Application Laid-Open No. 2005-38771 [Patent Document 5] and Japanese Patent Application Laid-Open No. 2006-269140 [Patent Document 6] use a heat transfer member for heat generated from a light-emitting diode used as a light source of a surface-emitting display device. A technique for dissipating heat is disclosed.

  Japanese Patent Laid-Open No. 2006-331960 [Patent Document 7] discloses a technique for forming a heat radiating vent hole in a light source cover member in order to efficiently dissipate heat inside the light source cover in which the light emitting diodes are housed. ing. Patent Document 6 also discloses that a vent is formed in a lid that houses a light emitting diode.

  Further, JP 2004-325604 A [Patent Document 8] includes a display unit holder and a plurality of light emitting diodes in a single-sided light emitting display device, in which a power source, an emergency power source and a display unit are locked. A structure is disclosed in which a circuit board is housed, a heat radiating plate is connected to the display unit holder and the circuit board, and heat from the power source and the light emitting diode is radiated to the outside of the display body.

Japanese Unexamined Patent Application Publication No. 2002-216525 [Patent Document 9] discloses a surface illumination device using a metal substrate having high thermal conductivity as a circuit board on which a light emitting diode is mounted.
Utility Model Registration No. 3101018 JP 2006-11101 A JP 2004-271734 A JP 2007-258089 A JP 2005-38771 A JP 2006-269140 A JP 2006-331960 A JP 2004-325604 A JP 2002-216525 A

  In the double-sided light emitting display devices of Patent Documents 1 to 3, double-sided light emitting displays are obtained by using one surface emitting panel member. This is because there is a desire to make the thickness dimension of the light emitting display portion of the double-sided light emitting display device as thin as possible. However, although the conventional apparatus can reduce the thickness dimension, there is a problem that the amount of light emitted from the light emitting display surface is not sufficient. Therefore, in order to increase the amount of light, it is conceivable to separately provide a surface light emitting panel member for front light emitting display and a surface light emitting panel member for rear light emitting display. However, when two surface light emitting panel members are used, the amount of heat generation increases as the number of light emitting diodes increases, and the thickness dimension of the light emitting display portion increases.

  An object of the present invention is to provide a double-sided light emitting display device that can improve the heat dissipation performance without increasing the thickness dimension of the light emitting display portion even if two surface light emitting panel members are used.

  In addition to the above object, another object of the present invention is to provide a double-sided light emitting display device capable of reducing the influence of heat from the power supply unit.

  A double-sided light emitting display device according to the present invention includes first and second surface light emitting panel members, first and second light-transmitting plates, a frame-like structure, for front light emitting display and rear light emitting display. Is used. The 1st and 2nd surface emitting panel member is provided with the some light emitting diode, the light-guide plate, the heat sink, and the light-diffusion pattern. The light guide plate includes a front surface, a rear surface facing the front surface, and an outer peripheral surface positioned between the front surface and the rear surface, and guides light emitted from a plurality of light emitting diodes from the outer peripheral surface to the inside and radiates from the front surface. To do. The heat radiating plate is disposed so as to face the back surface of the light guide plate with a gap therebetween, and is formed of a material having high thermal conductivity that radiates heat emitted from the plurality of light emitting diodes. The light diffusion pattern is formed on one of the back surface of the light guide plate or the surface of the heat radiating plate facing the light guide plate, and diffuses the light incident on the light guide plate. The light diffusion pattern may be formed by printing on one of the back surface of the light guide plate or the surface of the heat radiating plate facing the light guide plate, may be formed by machining, or the light diffusion pattern is printed. The sheet may be attached to one of the rear surface of the light guide plate or the surface of the heat radiating plate facing the light guide plate.

  Moreover, the 1st and 2nd translucent board has a light transmittance, and is arrange | positioned in the front side of the front surface of each light-guide plate of a 1st and 2nd surface emitting panel member.

  The frame-like structure includes the first surface-emitting panel member and the second surface-emitting panel member in a state where the heat-radiating plate of the first surface-emitting panel member and the heat-dissipating plate of the second surface-emitting panel member are opposed to each other with a predetermined interval. The surface light emitting panel member is positioned, the first light transmitting plate is positioned in front of the front surface of the light guide plate of the first surface light emitting panel member, and the front side of the front surface of the light guide plate of the second surface light emitting panel member In the state where the second light transmitting plate is positioned, the first and second surface light emitting panel members and the outer periphery of the first and second light transmitting plates are surrounded. The frame-shaped structure includes a first metal frame member extending along the plurality of light emitting diodes, a second metal frame member facing the first frame member, and first and second frames. A metal third frame member that connects one end of each of the members and a metal fourth frame member that connects the other ends of the first and second frame members are provided. Of the four frame members, at least the first and second frame members are in contact with the heat radiating plate of the first surface light emitting panel member and the heat radiating plate of the second surface light emitting panel member so that heat can be transferred. It is configured.

  In the double-sided light emitting display device of the present invention, since the first and second surface light emitting panel members to be used include a heat radiating plate having a light diffusion pattern opposed to the light guide plate, the surface light emitting panel member itself is made of a light emitting diode. The heat generated can be dissipated. In particular, in the present invention, since a predetermined interval is provided between the heat radiating plate of the first surface light emitting panel member and the heat radiating plate of the second surface light emitting panel member, heat is generated between the two surface light emitting panel members. There is no transfer. Further, in the present invention, among the first to fourth frame members made of metal constituting the frame-shaped structure, at least the first frame member closest to the heat generation source and the second frame member facing the first frame member. The heat sink of the 1st surface emitting panel member and the heat sink of the 2nd surface emitting panel member are made to contact the frame material. As a result, heat from the heat generation source is radiated from the entire frame-like structure through the first frame material. At the same time, since a thermal gradient is created through the heat sink from the first frame material side to the second frame material side, the heat sink of the first surface light emitting panel member and the heat sink of the second surface light emitting panel member Even if the interval between the two is reduced, heat can be actively radiated from the first surface-emitting panel member and the second surface-emitting panel member. Therefore, according to the present invention, even when two surface light emitting panel members are used, there is an advantage that the heat dissipation performance can be improved without increasing the thickness dimension of the light emitting display portion. If all of the first to fourth frame members are configured to contact the heat radiating plate of the first surface light emitting panel member and the heat radiating plate of the second surface light emitting panel member so as to be able to transfer heat, the heat radiating performance is further improved. Can be improved.

  The first frame material and the second frame material may have a structure including a frame main body portion, a central wall portion, and first and second standing wall portions. The frame main body portion of the first frame member extends in a direction orthogonal to the front surfaces of the light guide plates of the first and second surface emitting panel members. The central wall portion is formed integrally with the central portion of the frame main body portion and is in contact with the heat radiating plate of the first surface light emitting panel member and the heat radiating plate of the second surface light emitting panel member so as to be able to transfer heat. Wall. The first standing wall portion is formed integrally with the frame main body portion and between the first wall surface of the first surface light emitting panel member and the first transparent member between the first wall surface of the central wall portion. A first groove is formed to receive a first light transmission plate edge of the light plate. The second upright wall portion is formed integrally with the frame main body portion, and between the second wall surface of the central wall portion, the first panel member edge portion of the second surface emitting panel member and the second wall surface portion. A second groove portion into which the first translucent plate edge portion of the translucent plate enters is formed. The frame main body portion of the second frame material extends in a direction orthogonal to the front surfaces of the light guide plates of the first and second surface emitting panel members. The central wall portion is formed integrally with the central portion of the frame main body portion and is in contact with the heat radiating plate of the first surface light emitting panel member and the heat radiating plate of the second surface light emitting panel member so as to be able to transfer heat. Wall. The first upright wall portion is formed integrally with the frame main body portion and between the first wall surface of the central wall portion, the second upright wall portion faces the first panel member edge portion of the first surface emitting panel member. The first groove portion into which the panel member edge and the second light-transmitting plate edge facing the first light-transmitting plate edge in the first light-transmitting plate enter is formed. The second upright wall portion is formed integrally with the frame main body portion, and between the second wall surface of the central wall portion, the second upright wall portion faces the first panel member edge portion of the second surface emitting panel member. Forming a second groove portion into which the second light transmitting plate edge facing the first light transmitting plate edge of the second panel member and the second light transmitting plate is placed.

  When such first and second frame materials are used, heat transfer from the heat sink of the first and second surface light emitting panel members is improved, and the first and second surface light emitting panel members and The first and second translucent plates can be easily held.

  Similarly to the first and second frame members, the third and fourth frame members have a structure including a frame main body portion, a central wall portion, and first and second standing wall portions. Can do. In the case of the third frame material, the frame main body extends in a direction orthogonal to the front surfaces of the light guide plates of the first and second surface emitting panel members. The central wall portion is formed integrally with the central portion of the frame main body portion, abuts against one end of the central wall portion of the first and second frame members, and the heat radiation plate and the second surface of the first surface-emitting panel member. It has the 1st and 2nd wall surface which contacts the heat sink of a light emission panel member so that heat transfer is possible. The first upright wall is formed integrally with the frame main body and between the first wall surface of the first surface emitting panel member and the second wall between the first wall surface and the first wall surface of the central wall. A third panel member edge portion of the first surface-emitting panel member located between one end of the panel member edge portion and one end of the first light-transmitting plate edge portion of the first light-transmitting plate. A first groove portion into which the third light transmissive plate edge portion located between one end of the light transmissive plate edge portion is formed is formed. The second upright wall is formed integrally with the frame body and between the second wall surface of the central wall and the one end of the first panel member edge of the second surface emitting panel member and the second wall. A second panel member edge part of the second surface-emitting panel member located between one end of the second panel member edge part and one end of the first light-transmitting plate edge part of the second light-transmitting plate; Forming a second groove portion into which the third light-transmitting plate edge portion located between one end of the light-transmitting plate edge portion enters.

  Also in the case of the fourth frame material, the frame main body extends in a direction orthogonal to the front surfaces of the light guide plates of the first and second surface emitting panel members. The central wall portion is formed integrally with the central portion of the frame main body portion, abuts against the other end of the central wall portion of the first and second frame members, and the heat radiating plate and the second surface emitting panel member. The first and second wall surfaces are in contact with the heat radiating plate of the surface light emitting panel member so as to be able to transfer heat. The first upright wall portion is formed integrally with the frame main body portion, and between the other end of the first panel member edge of the first surface emitting panel member and the first wall surface of the central wall portion, The 4th panel member edge of the 1st surface emitting panel member located between the other ends of the 2nd panel member edge, and the other end of the 1st translucent board edge of the 1st translucent board And the 1st groove part in which the 4th translucent board edge located between the other ends of the 2nd translucent board edge enters is formed. The second upright wall portion is formed integrally with the frame main body portion and between the second wall surface of the central wall portion and the other end of the first panel member edge portion of the second surface emitting panel member and The 4th panel member edge of the 2nd surface emitting panel member located between the other ends of the 2nd panel member edge, and the other end of the 1st translucent board edge of the 2nd translucent board And the 2nd groove part in which the 4th translucent board edge located between the other ends of the 2nd translucent board edge enters is formed.

  If the 1st thru | or 4th frame material is comprised as mentioned above, heat will be favorable to the frame-shaped structure from the heat sink of the 1st and 2nd surface emitting panel member via the center wall part of each frame material. introduce. Further, the first and second surface emitting panel members and the first and second light-transmitting plates can be held with a simple structure.

  Further, the frame-like structure is disposed between the third frame material and the fourth frame material, and is connected to the central wall portions of the first and second frame materials so as to be capable of transferring heat, and the first and second frame structures. It is preferable to further include one or more intermediate frame members that are in contact with the respective heat sinks of the two surface light emitting panel members so as to be able to transfer heat. Providing such an intermediate frame material can increase the mechanical strength of the frame-like structure and further improve the heat dissipation from the first and second surface-emitting panel members.

  A power supply unit including a transformer that generates electric power for driving the plurality of light emitting diodes may be provided separately. However, when the power supply unit is provided together, the frame main body unit of the first frame member is a part of the power storage housing that houses the power supply unit including the transformer for supplying power to the plurality of light emitting diodes. Preferably, the two walls are configured. In this way, not only can the number of components be reduced, but the distance between the power supply unit and the light emitting diode is shortened, and electrical connection between the two is facilitated. Further, the frame main body portion of the first frame material functions as a barrier that prevents heat generated in the power supply portion from directly affecting the light emitting diode side.

  In addition, at least one wall portion excluding the wall portion constituted by the frame main body portion among the plurality of wall portions constituting the power supply housing is opened when the power supply portion is inspected. It is preferable to configure. This facilitates periodic inspection work.

  Furthermore, a plurality of ribs for heat dissipation may be integrally formed on the outer wall portion of the four wall portions connected to the frame main body portion among the plurality of wall portions constituting the power supply housing. Providing such a plurality of heat dissipation ribs actively dissipates heat transferred from the frame main body of the first frame material and heat generated in the power supply from the power supply housing to the outside air. Can do.

  In addition, it is preferable that a plurality of heat radiation ribs be integrally formed on the outer wall portions of the second to fourth frame members. If it does in this way, the heat dissipation from a frame-shaped structure can be made still better.

  Furthermore, a vent hole may be formed in two or more wall portions of the plurality of wall portions constituting the power supply housing. By forming such a vent hole, the hot air inside the power supply housing can be discharged to the outside through the vent hole even if the power supply housing has a structure in which hot air is likely to be trapped inside.

  The power supply housing can be structured to have an opening in a portion facing the wall portion constituted by the frame main body portion of the first frame material. The frame main body portion of the first frame material is formed with a plurality of air holes communicating the inside of the frame-like structure and the inside of the power storage housing. The frame main body portion of the second frame material has a frame A plurality of air holes that communicate the inside and the outside of the structure can be formed. In this way, outside air that has entered the inside of the frame-like structure through the plurality of ventilation holes formed in the second frame material is stored in the power supply through the plurality of ventilation holes formed in the first frame material. The cooling performance can be enhanced by entering the housing and exiting to the outside through the opening.

  According to the double-sided light emitting display device of the present invention, since the first and second surface light emitting panel members to be used include the heat radiating plate facing the light guide plate, the surface light emitting panel member itself radiates heat generated from the light emitting diode. can do. In particular, according to the present invention, there is a predetermined gap between the heat radiation plate of the first surface light emitting panel member and the heat radiation plate of the second surface light emitting panel member. Never give or receive heat. Further, according to the present invention, among the first to fourth frame members made of metal constituting the frame-like structure, the first frame member and the first frame member that are at least closest to the heat generation source are opposed to each other. Since the heat radiation plate of the first surface light emitting panel member and the heat radiation plate of the second surface light emitting panel member are brought into contact with the frame material 2, the heat from the heat source passes through the first frame material and the frame structure Heat is dissipated from the whole. At the same time, since a thermal gradient is created through the heat sink from the first frame material side to the second frame material side, the heat sink of the first surface light emitting panel member and the heat sink of the second surface light emitting panel member Even if the interval between the two is reduced, heat can be actively radiated from the first surface-emitting panel member and the second surface-emitting panel member. Therefore, according to the present invention, even when two surface light emitting panel members are used, there is an advantage that the heat dissipation performance can be improved without increasing the thickness dimension of the light emitting display portion.

  Hereinafter, an example of an embodiment of a double-sided light emitting display device of the present invention will be described in detail with reference to the drawings. FIG. 1A is a front view of an embodiment in which a double-sided light emitting display device 1 according to an embodiment of the present invention is applied to a guidance display device used in a station premises, and FIG. 1B is a bottom view, FIG. 1 (C) and (D) are a left side view and a right side view. The double-sided light emitting display device 1 is attached to the ceiling using three fixtures 3. The double-sided light emitting display device 1 includes a power storage housing 5 and a display device structure section 7. Although not shown in FIG. 1A, the double-sided light emitting display device 1 has a display panel on which information is written on the back side.

  FIG. 2A shows a state in which two display panels (first and second translucent plates 9 and 11 described later) and two surface light emitting panel members 13 and 15 are removed from the front side and the rear side. FIG. 2B is a front view showing a state in which the front wall portion of the power storage housing 5 is further removed. 3 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 4 is a diagram used for schematically explaining the structure of the surface light emitting panel member. 2A and 2B schematically show the structure, and the dimensions are not accurate. In FIGS. 3 and 4, the cross section is not particularly hatched.

  The double-sided light emitting display device 1 includes first and second light-transmitting plates 9 and 11, first and second surface-emitting panel members 13 and 15, and a frame for front light emission display and rear light emission display. The structure 17 is used. The 1st and 2nd translucent plates 9 and 11 can be comprised with the board | plate material or sheet | seat which has a light transmittance. For example, the material is a transparent or milky white plate or sheet such as acrylic or polycarbonate, and is configured by printing on its surface or attaching characters or designs. The first and second translucent plates 9 and 11 are disposed on the front side of the first and second surface emitting panel members 13 and 15. As shown schematically in FIG. 4, the first and second surface light emitting panel members 13 and 15 include a plurality of light emitting diodes 19 and 21 that are linearly arranged in a direction orthogonal to the paper surface of FIG. 4, and a light guide plate, respectively. 23, 25, heat dissipation plates 27 and 29, and light diffusion patterns 31 and 33. In order to facilitate understanding, in FIG. 4, the gap G between the light diffusion patterns 31 and 33 and the heat sinks 27 and 29 is drawn large. The first and second surface emitting panel members 13 and 15 are configured as an integral structure using a predetermined holding structure configured to maintain the gap. The light guide plates 23 and 25 include front surfaces 23A and 25A, back surfaces 23B and 25B facing the front surfaces 23A and 25A, and outer peripheral surfaces 23C and 25C positioned between the front surfaces 23A and 25A and the back surfaces 23B and 25B, respectively. . Light emitted from the plurality of light emitting diodes 19 and 21 is guided to the inside from a part of the outer peripheral surfaces 23C and 25C of the light guide plates 23 and 25, and printed on the back surfaces 23B and 25B of the light guide plates 23 and 25. The light is diffused by the presence of the diffusion patterns 31 and 33 and emitted from the front surfaces 23A and 25A of the light guide plates 23 and 25.

  The heat sinks 27 and 29 are disposed so as to face the back surfaces 23B and 25B of the light guide plates 23 and 25 with a gap G therebetween. The heat sinks 27 and 29 are formed of a material having high thermal conductivity such as aluminum or copper that dissipates heat from the light emitting diodes 19 and 21. The light diffusion patterns 31 and 33 are configured by a plurality of dots D formed by a printing technique such as screen printing, ink jet printing, thermal transfer, or the like. The light diffusion patterns 31 and 33 may be formed by machining the back surfaces 23B and 25B of the light guide plates 23 and 25. Further, the light diffusion pattern is formed as an independent sheet material on which dots are printed, and is pasted on the back surfaces 23B and 25B of the light guide plates 23 and 25 or the surfaces of the heat radiating plates 27 and 29 facing the light guide plates 23 and 25. Of course, it may be. In the present embodiment, the circuit boards 20 and 22 on which the light emitting diodes 19 and 21 are mounted are mounted on the upper end sides of the heat radiating plates 27 and 29 so that heat can be transferred. In the present embodiment, the polymer of the light guide plates 23 and 25 and the heat radiating plates 27 and 29 overlapped via a spacer (not shown) is a taping member or the like in the main part of the outer peripheral portion excluding the region where the circuit boards 20 and 22 are arranged. It is fixed using a fixing material.

  The frame-like structure 17 has a first surface in a state where the heat radiating plate 27 of the first surface light emitting panel member 13 and the heat radiating plate 29 of the second surface light emitting panel member 15 are opposed to each other with a predetermined distance L. The light emitting panel member 13 and the second surface light emitting panel member 15 are positioned, the first light transmitting plate 9 is positioned on the front side of the front surface 23A of the light guide plate 23 of the first surface light emitting panel member 13, and the second surface light emitting panel member 15 is positioned. With the second light transmissive plate 11 positioned in front of the front surface 25A of the light guide plate 25 of the surface light emitting panel member 15, the first and second surface light emitting panel members 13 and 15 and the first and second light transmissive panels 11 are positioned. It has a structure surrounding the outer peripheries of the optical plates 9 and 11. The distance L between the heat radiating plate 27 and the heat radiating plate 29 is for providing an air layer so as not to heat each other, and at least several mm is required. Practically, when the double-sided light emitting display device is enlarged, the mechanical strength of the frame body 17 is required. Therefore, the intermediate frame materials 43 to 51 described later need to have a large cross-sectional dimension so that the strength as a structure increases. There is. In the in-station double-sided light emitting display device of this embodiment, the interval L is 10 mm. The frame-shaped structure 17 includes a first metal frame member 35 extending along the plurality of light emitting diodes 19 and 21, a second metal frame member 37 facing the first frame member 35, and a first frame member 37. A metal third frame member 39 that connects one end of each of the first and second frame members 35 and 37, and a metal member that connects the other ends of the first and second frame members 35 and 37, respectively. And a fourth frame member 41. Specifically, the first to fourth frame members 35 to 41 are made of extruded products of aluminum. In the present embodiment, among the four frame members 35 to 41, the first and second frame members 35 and 37 are the heat radiating plate 27 of the first surface emitting panel member 13 and the second surface emitting panel member. The heat dissipation plate 29 is configured to be in contact with the heat dissipation plate 29 so that heat can be transferred.

  As shown in FIG. 5, the first frame member 35 and the second frame member 37 are composed of frame main body portions 35A and 37A, central wall portions 35B and 37B, and first and second upright wall portions 35C and 35D. And 37C and 37D. In FIG. 5, the first and second surface emitting panel members 13 and 15 and the first and second light-transmitting plates 9 and 11 are indicated by imaginary lines (broken lines). The frame main body 35A of the first frame member 35 extends in a direction (horizontal direction) orthogonal to the front surfaces 23A and 25A of the light guide plates 23 and 25 of the first and second surface emitting panel members 13 and 15. The central wall portion 35B is integrally formed with the central portion of the frame main body portion 35A and is in contact with the heat radiating plate 27 of the first surface light emitting panel member 13 and the heat radiating plate 29 of the second surface light emitting panel member 15 so as to be able to transfer heat. First and second wall surfaces 36A and 36B are provided. The first standing wall portion 35C is formed integrally with the frame main body portion 35A, and between the first wall surface 36A of the central wall portion 35B, the first panel member edge portion of the first surface emitting panel member 13 is formed. 13A and the 1st groove part S1 into which the 1st translucent board edge part 9A of the 1st translucent board 9 enters are formed. The second upright wall portion 35D is formed integrally with the frame main body portion 35A, and between the second wall surface 36B of the central wall portion 35B, the first panel member edge of the second surface emitting panel member 15 is formed. The second groove portion S2 into which the portion 15A and the first light transmitting plate edge portion 11A of the second light transmitting plate 11 enter is formed.

  The frame main body 37A of the second frame member 37 extends in a direction (horizontal direction) orthogonal to the front surfaces 23A and 25A of the light guide plates 23 and 25 of the first and second surface emitting panel members 13 and 15. The central wall portion 37B is formed integrally with the central portion of the frame main body portion 37A and is in contact with the heat radiating plate 27 of the first surface light emitting panel member 13 and the heat radiating plate 29 of the second surface light emitting panel member 15 so as to be able to transfer heat. First and second wall surfaces 38A and 38B are provided. The first standing wall portion 37C is formed integrally with the frame main body portion 37A, and between the first wall surface 38A of the central wall portion 37B, the first panel member edge portion of the first surface emitting panel member 13 is provided. The second panel member edge 13B facing 13A and the first groove S3 into which the second light transmissive plate edge 9B facing the first light transmissive plate edge 9A in the first light transmissive plate 9 enters. Form. The second upright wall portion 37D is formed integrally with the frame main body portion 37A, and between the second wall surface 38B of the central wall portion 37B, the first panel member edge of the second surface emitting panel member 15 is provided. The second panel member edge 15B facing the portion 15A and the second groove S4 into which the second light transmissive plate edge 11B facing the first light transmissive plate edge 11A in the second light transmissive plate 11 enters. Form.

  When such first and second frame members 35 and 37 are used, heat transfer from the heat radiating plates of the first and second surface emitting panel members 13 and 15 is improved, and the first and second frame members 35 and 37 are used. The surface light emitting panel members 13 and 15 and the first and second light transmitting plates 9 and 11 can be easily held.

  As shown in FIG. 6, the third and fourth frame members 39 and 41 are similar to the first and second frame members 35 and 37 in that the frame main body portions 39A and 41A, the central wall portions 39B and 41B, The first and second upright wall portions 39C and 41C and 39D and 41D can be provided. In the case of the third frame member 39, the frame main body 39A extends in a direction (vertical direction) orthogonal to the front surfaces 23A and 25A of the light guide plates 23 and 25 of the first and second surface emitting panel members 13 and 15. The central wall portion 39B is formed integrally with the central portion of the frame main body portion 39A, abuts against one end of the central wall portions 35B and 37B of the first and second frame members 35 and 37, and is a first surface emitting panel member. 13 and 2nd wall surfaces 40A and 40B which contact the heat sink 27 of 13 and the heat sink 29 of the 2nd surface emitting panel member 15 so that heat transfer is possible. The first upright wall portion 39C is formed integrally with the frame main body portion 39A, and between the first wall surface 40A of the central wall portion 39B and one end of the first panel member edge portion 13A and the second panel member. One end of the third panel member edge 13C and the first translucent plate edge 9A and the second translucent plate edge 9B of the first surface-emitting panel member 13 positioned between one end of the edge 13B. A first groove S5 into which the third light-transmitting plate edge portion 9C located between the first and second ends is formed. Further, the second upright wall portion 39D is formed integrally with the frame main body portion 39A and between the second wall surface 40B of the central wall portion 39B and the first panel member edge of the second surface emitting panel member 15. The third panel member edge 15C of the second surface-emitting panel member 15 and the first light transmitting plate 11 are located between one end of the portion 15A and one end of the second panel member edge 15B. A second groove S6 into which the third light transmissive plate edge 11C located between one end of the light transmissive plate edge 11A and one end of the second light transmissive plate edge 11B is formed.

  In the fourth frame member 41, the frame body 41A extends in a direction (vertical direction) orthogonal to the front surfaces 23A and 25A of the light guide plates 23 and 25 of the first and second surface emitting panel members 13 and 15. The central wall portion 41B is formed integrally with the central portion of the frame main body portion 41A, abuts against the other ends of the central wall portions 35B and 37B of the first and second frame members 35 and 37, and the first surface emission. The heat sink 27 of the panel member 13 and the heat sink 29 of the 2nd surface emitting panel member 15 are provided with the 1st and 2nd wall surface 42A and 42B which contact so that heat transfer is possible. The first upright wall portion 41C is formed integrally with the frame main body portion 41A, and between the first wall surface 42A of the central wall portion 41B, the first panel member edge portion of the first surface emitting panel member 13 is formed. In addition to the fourth panel member edge 13D and the first light transmissive plate edge 9A of the first light transmissive plate 9 located between the other end of 13A and the other end of the second panel member edge 13B. A first groove S7 into which the fourth light transmissive plate edge 9D located between the end and the other end of the second light transmissive plate edge 9B is formed is formed. Further, the second upright wall portion 41D is formed integrally with the frame main body portion 41A, and between the second wall surface 42B of the central wall portion 41B, the first panel member edge of the second surface emitting panel member 15 is formed. The fourth panel member edge 15D of the second surface-emitting panel member 15 and the second light transmitting plate 11 located between the other end of the portion 15A and the other end of the second panel member edge 15B. A second groove S8 into which the fourth light transmissive plate edge 11D positioned between the other end of the first light transmissive plate edge 11A and the other end of the second light transmissive plate edge 11B is formed.

  If the 1st thru | or 4th frame materials 35 thru | or 41 are comprised as mentioned above, the heat sink 27 of the 1st and 2nd surface emitting panel members 13 and 15 via the center wall part 35B thru | or 41B of each frame material. And 29, heat is transferred to the frame-like structure 17 satisfactorily. Further, the first and second surface emitting panel members 13 and 15 and the first and second light transmitting plates 9 and 11 can be held with a simple structure.

  Further, in the present embodiment, the frame-like structure 17 is disposed between the third frame member 39 and the fourth frame member 41, and the central wall portions of the first and second frame members 35 and 37 are arranged. The five intermediate frame members 43 to 51 are connected to the heat sinks 35B and 37B so as to be able to transfer heat and are in contact with the heat radiation plates 27 and 29 of the first and second surface emitting panel members 13 and 15 so as to be able to transfer heat. ing. The main purpose of the intermediate frame members 43 to 51 is to increase the mechanical strength of the frame-like structure 17 and to maintain the distance L between the heat sinks 27 and 29 shown in FIG. In the embodiment, the intermediate frame members 43 to 51 are also used for heat radiation from the heat radiation plates 27 and 29. In the present embodiment, these intermediate frame members 43 to 51 are formed of a steel material having high mechanical strength. Of course, it may be formed of a material having good thermal conductivity, such as aluminum or copper, as in the first to fourth frame materials. In FIG. 7, the attachment structure of one intermediate frame member 47 is shown enlarged. The intermediate frame material 47 is configured by a shape member having a U-shaped cross section cut in a direction orthogonal to the longitudinal direction. The intermediate frame member 47 is fixed to the central wall portions 35B and 37B of the first and second frame members 35 and 37 by using bolts B with flange portions 47A and 47B provided integrally at both ends in the longitudinal direction. ing. On the first frame member 35, an attachment structure 53 of the fixture 3 for fixing the device to the ceiling UP is fixed. The attachment structure 53 is stored in the power storage housing 5. The mounting structure 53 is configured by a shape member having a C-shaped cross section in a direction orthogonal to the longitudinal direction. The mounting structure 53 has a lower side wall 53A fixed to the frame main body 35A of the first frame member 35 by four bolts B for fixing the intermediate frame member 47 to the first frame member 35. Yes. A bolt B <b> 1 of the fixture 3 is attached to the upper wall portion 53 </ b> B of the attachment structure 53. The intermediate frames 45, 47 and 49 are fixed to the first and second frame members 35 and 37, respectively, with the mounting structure shown in FIG. The intermediate frame members 43 and 51 are also fixed to the first and second frame members 35 and 37 by mounting structures using bolts, respectively. By providing such intermediate frame members 43 to 51, the mechanical strength of the frame-like structure 17 can be increased, and the heat radiation from the first and second surface emitting panel members 13 and 15 can be further improved. It can be.

  As shown in FIG. 2B, two power supply units PW1 and PW2 including a transformer that generates electric power for driving the plurality of light emitting diodes 19 and 21 are formed on the frame main body 35A of the first frame member 35. It is fixed on the top. This is because in the present embodiment, since the length of the display device is long, the first and second surface light emitting panel members 13 and 15 are each constituted by two sets of divided surface light emitting panel members. . That is, the 1st surface emitting panel member 13 is comprised by two division | segmentation surface emitting panel members, and the 2nd surface emitting panel member 15 is comprised by two division | segmentation surface emitting panel members. Therefore, the first power supply unit PW1 is provided for one set of divided surface light emitting panel members disposed opposite to each other, and the second power supply unit PW2 is provided for another set of divided surface light emitting panel members. It has been. In the present embodiment, since the two power supply parts PW1 and PW2 are provided on the frame main body part 35A of the first frame member 35, the frame main body part 35A is for supplying power to the plurality of light emitting diodes 19 and 21. One wall part of the power supply housing 5 for housing the power supply parts PW1 and PW2 including the transformer is configured. In this way, not only can the number of components for configuring the power supply housing 5 be reduced, but also the distance between the power supply units PW1 and PW2 and the light emitting diodes 19 and 21 is shortened. Easy electrical connection. The frame main body portion 35A of the first frame member 35 functions as a barrier that prevents heat generated in the power supply portions PW1 and PW2 from directly affecting the light emitting diodes 19 and 21 side.

  In the present embodiment, as shown in FIGS. 2A and 3, four wall portions that can extend upward from the peripheral edge portion of the frame main body portion 35 </ b> A of the first frame member 35 for the power storage housing 5. 53, 55, 57 and 59. In the present embodiment, as shown in FIG. 8, the lower ends of the walls 53 and 55 are configured to open and close to the front and rear sides of the frame main body 35A via hinge mechanisms H1 and H2. Has been. This facilitates regular inspection work of the power supply unit. The side wall portions 57 and 59 are integrated with the third and fourth frame members 39 and 41 in combination. 9A and 9B are enlarged views showing a state in which the wall portion 59 and the fourth frame member 41 are combined and integrated. As shown in FIG. 9, the integrated member 61 in which the wall portion 59 and the fourth frame member 41 are integrated opens and closes via a hinge mechanism H <b> 3 provided on the upper end side of the wall portion 59. As shown in FIG. 9B, the free end of the integrated member 61 is attached to an attachment screw 65 using a screw hole (not shown) provided in an L-shaped bracket fixed to the second frame member 37. It is fixed to the second frame member 37 using By adopting such a structure, it is possible to open the integrated member 61 and replace the first and second translucent plates 9 and 11. The wall 57 and the third frame member 39 facing the wall 59 are also integrated in the same manner as the wall 59 and the fourth frame member 41. In the embodiment, the integrated member obtained by integrating the wall portion 57 and the third frame member 39 is not particularly configured to open and close. However, as a matter of course, this integrated member may be configured to open and close around the upper end as in the case of the integrated member 61.

  In the present embodiment, a plurality of ribs 63 for heat dissipation are provided on the outer wall portions of the four wall portions 53 to 59 connected to the frame main body portion 35A among the plurality of wall portions constituting the power supply housing 5. It is integrally formed. In the present embodiment, a plurality of ribs 63 for heat dissipation are also integrally provided on the outer wall portions of the second to fourth frame members 37 to 41. As a result, the heat transferred from the frame main body 35A of the first frame member 35 and the heat generated in the power supply units PW1 and PW2 can be actively dissipated from the power supply housing 5 to the outside air. Heat can also be actively dissipated from the main outer wall portion of the frame-like structure 17.

  In the present embodiment, an opening is provided in the ceiling portion of the power supply housing 5 and is in an open state. Therefore, no heat is trapped in the power supply housing 5. However, in the case where the power supply housing 5 has a structure in which hot air is likely to be trapped inside, a ventilation hole is formed in two or more wall portions among the plurality of wall portions 53 to 59 constituting the power supply housing 5. Also good. When such a vent is formed, hot air inside the power supply housing can be discharged to the outside through the vent.

  As shown in FIG. 10, when the power supply housing 5 employs a structure having an opening in the ceiling portion facing the wall portion constituted by the frame main body portion 35A of the first frame member 35, A plurality of ventilation holes TH1 that communicate the inside of the frame-shaped structure 17 and the inside of the power supply housing 5 with the frame body 35A of the first frame member 35 are provided along the longitudinal direction of the frame body 35A. They are formed at a predetermined interval. In this example, a plurality of through holes TH2 are formed in a reinforcing partition wall 35E provided in the central wall portion 35B. Also, a plurality of vent holes TH3 that communicate the inside and the outside of the frame-like structure 17 are formed in the frame main body portion 37A of the second frame member 37 at predetermined intervals along the longitudinal direction of the frame main body portion 37A. It is. Further, a plurality of through holes TH4 are formed in a reinforcing partition wall portion 37E provided in the central wall portion 37B. In this way, the plurality of surface emitting panel members 13 are formed inside the frame-shaped structure 17 through the plurality of ventilation holes TH3 formed in the second frame member 37 and the through holes TH4 provided in the partition wall portion 37E. And the outside air that has entered the space formed between the plurality of through holes TH2 formed in the partition wall portion 35E of the first frame member 35 and the plurality of passages formed in the frame main body portion 35A of the first frame member 35. The air enters the power supply housing 5 through the pores TH1 and exits to the outside through an opening formed in the ceiling. By forming such an air passage, the cooling performance can be improved.

(A) is the front view of embodiment which applied the double-sided light emission display apparatus of embodiment of this invention to the guidance display apparatus used in a station premises, (B) is a bottom view, (C) and ( D) is a left side view and a right side view. (A) is a front view of the state which removed the two display panels of the front side and the back side, (B) has shown the front view of the state which further removed the front wall part of the housing for power storage. It is the sectional view on the AA line of FIG. It is a figure used in order to demonstrate roughly the structure of a surface emitting panel member. It is a figure used in order to explain the structure of the 1st and 2nd frame material. It is a figure used in order to explain the structure of the 3rd and 4th frame material. It is a figure used in order to explain the attachment structure of an intermediate frame material. It is a figure used in order to demonstrate the structure of the wall part of the housing for power storage. (A) And (B) is a figure used in order to demonstrate the side structure of a double-sided light emission display device, respectively. It is a figure used in order to show the modification of the 1st and 2nd frame material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Double-sided light emission display apparatus 3 Attaching tool 5 Power supply housing 7 Display apparatus structure part 9,11 1st and 2nd translucent board 13,15 1st and 2nd surface emitting panel member 17 Frame-shaped structure 19, 21 Light Emitting Diodes 23, 25 Light Guide Plates 27, 29 Heat Dissipating Plates 31, 33 Light Diffusion Patterns 35-41 First to Fourth Frame Materials 43-51 Intermediate Frame Materials

Claims (10)

A plurality of light emitting diodes, and a front surface, a rear surface facing the front surface, and an outer peripheral surface positioned between the front surface and the rear surface, and guides light emitted from the plurality of light emitting diodes from the outer peripheral surface to the inside. A light guide plate that emits light and radiates from the front surface, and is disposed to face the back surface of the light guide plate with a gap therebetween, and is formed from a material having high thermal conductivity that dissipates heat emitted from the plurality of light emitting diodes. And a light diffusion pattern that is formed on one of the back surface of the light guide plate or the surface of the heat sink plate facing the light guide plate and diffuses the light incident on the light guide plate. First and second surface emitting panel members;
First and second light transmissive plates having light transmissivity disposed on the front side of the front surface of the light guide plate of each of the first and second surface emitting panel members;
The first surface-emitting panel member and the second surface-emitting panel member in a state where the heat-radiating plate of the first surface-emitting panel member and the heat-dissipating plate of the second surface-emitting panel member are opposed to each other with a predetermined interval. The surface light emitting panel member is positioned, the first light transmitting plate is positioned on the front side of the front surface of the light guide plate of the first surface light emitting panel member, and the guide of the second surface light emitting panel member is positioned. A frame shape surrounding the first and second surface emitting panel members and the outer periphery of the first and second light transmitting plates in a state where the second light transmitting plate is positioned in front of the front surface of the light plate. With a structure,
The frame-shaped structure includes a first metal frame material extending along the plurality of light emitting diodes, a second metal frame material facing the first frame material, and the first and first frame materials. A metal third frame member that connects one end of each of the two frame members, and a metal fourth frame member that connects the other ends of the first and second frame members, At least the first and second frame members are configured to contact the heat radiating plate of the first surface light emitting panel member and the heat radiating plate of the second surface light emitting panel member so that heat can be transferred. A double-sided light emitting display device characterized by The first frame material is formed integrally with a frame main body extending in a direction orthogonal to the front surface of the light guide plate of each of the first and second surface emitting panel members, and a central portion of the frame main body. And a central wall provided with first and second wall surfaces in contact with the heat radiating plate of the first surface light emitting panel member and the heat radiating plate of the second surface light emitting panel member so as to be capable of transferring heat, and A first panel member edge of the first surface-emitting panel member and a first of the first light-transmitting plate are formed integrally with the frame body and between the first wall surface of the central wall portion. Between the first standing wall portion forming the first groove portion into which the one light-transmitting plate edge portion enters and the second wall surface of the central wall portion formed integrally with the frame main body portion, First panel member edge and front of second surface emitting panel member A second upright wall portion forming a second groove in which the first light transmitting plate edge portion of the second light transmission plate enters,
The second frame material is formed integrally with a frame main body extending in a direction orthogonal to the front surface of the light guide plate of each of the first and second surface emitting panel members, and a central portion of the frame main body. And a central wall provided with first and second wall surfaces in contact with the heat radiating plate of the first surface light emitting panel member and the heat radiating plate of the second surface light emitting panel member so as to be capable of transferring heat, and A second panel member edge formed integrally with the frame main body and facing the first panel member edge of the first surface-emitting panel member between the first wall surface of the central wall portion And a first standing wall portion forming a first groove portion into which the second light transmissive plate edge portion facing the first light transmissive plate edge portion in the first light transmissive plate is inserted, and the frame main body Between the central wall and the second wall surface The second panel member edge facing the first panel member edge in the second surface-emitting panel member and the first light transmitting plate edge facing the first light transmitting plate edge in the second light transmitting plate. 2. The double-sided light emitting display device according to claim 1, further comprising a second standing wall portion that forms a second groove portion into which the two light-transmitting plate edges enter. The third frame material is formed integrally with a frame main body portion extending in a direction orthogonal to the front surface of the light guide plate of the first and second surface emitting panel members, and a central portion of the frame main body portion, Abutting on one end of the central wall portion of the first and second frame members and capable of transferring heat to the heat radiating plate of the first surface light emitting panel member and the heat radiating plate of the second surface light emitting panel member. The first surface-emitting panel member is formed between a central wall portion having first and second wall surfaces in contact with each other and the first wall surface of the central wall portion formed integrally with the frame main body portion. A third panel member edge of the first surface-emitting panel member and the first transparent member located between one end of the first panel member edge and one end of the second panel member edge. One end of the first translucent plate edge and the second translucent plate edge of the light plate A first standing wall portion that forms a first groove portion in which a third light-transmitting plate edge portion located between one end and the second main body wall portion is formed integrally with the frame main body portion; The second surface-emitting panel located between one end of the first panel member edge and the one end of the second panel member edge of the second surface-emitting panel member A third panel member edge of the member, a first light transmitting plate edge of the second light transmitting plate, and a third light transmitting plate edge positioned between the one end of the second light transmitting plate edge. A second standing wall portion forming a second groove portion into which the translucent plate edge portion enters,
The fourth frame material is formed integrally with a frame main body portion extending in a direction orthogonal to the front surface of the light guide plate of the first and second surface emitting panel members, and a central portion of the frame main body portion, The first and second frame members are in contact with the other end of the central wall portion and can transfer heat to the heat radiating plate of the first surface light emitting panel member and the heat radiating plate of the second surface light emitting panel member. The first surface-emitting panel is formed between a central wall portion having first and second wall surfaces in contact with the first wall surface and the first wall surface of the central wall portion formed integrally with the frame main body portion. A fourth panel member edge of the first surface-emitting panel member and the first located between the other end of the first panel member edge of the member and the other end of the second panel member edge; The other end of the first translucent plate edge and the second translucent plate edge of the translucent plate A first standing wall portion that forms a first groove portion into which a fourth light-transmitting plate edge portion is located, and the second main body portion formed integrally with the frame main body portion. The second surface emission located between the other end of the first panel member edge of the second surface emitting panel member and the other end of the second panel member edge between the wall surfaces. Located between the fourth panel member edge of the panel member, the other end of the first light transmissive plate edge of the second light transmissive plate, and the other end of the second light transmissive plate edge. The double-sided light emitting display device according to claim 2, further comprising: a second standing wall portion that forms a second groove portion into which the fourth translucent plate edge portion is inserted.   The frame-like structure is disposed between the third frame material and the fourth frame material, and is connected to the central wall portions of the first and second frame materials so as to be capable of transferring heat, and The planar light-emitting display according to claim 1, 2, or 3, further comprising one or more intermediate frame members that are in contact with the heat radiating plates of the first and second surface-emitting panel members so as to be capable of transferring heat. apparatus.   The frame main body portion of the first frame material constitutes one wall portion of a power supply housing that houses a power supply portion including a transformer for supplying power to the plurality of light emitting diodes. Item 6. A double-sided light emitting display device according to Item 2.   At least one other wall portion excluding the wall portion constituted by the frame main body portion among the plurality of wall portions constituting the power supply housing is opened when the power supply portion is inspected. The double-sided light emitting display device according to claim 5, which is configured as described above.   7. A plurality of heat-dissipating ribs are integrally formed on an outer wall portion of four wall portions connected to the frame body portion among a plurality of wall portions constituting the power supply housing. A double-sided light emitting display device as described in 1.   The double-sided light emitting display device according to claim 5 or 7, wherein a plurality of heat-dissipating ribs are integrally formed on outer wall portions of the second to fourth frame members.   The double-sided light emitting display device according to claim 5, wherein a ventilation hole is formed in two or more wall portions of the plurality of wall portions constituting the power supply housing. The power supply housing has an opening in a portion facing the wall portion constituted by the frame main body portion,
The frame main body portion of the first frame material is formed with a plurality of air holes that communicate the inside of the frame-like structure and the inside of the power supply housing,
The double-sided light emitting display device according to claim 5, wherein the frame main body portion of the second frame material is formed with a plurality of air holes communicating the inside and the outside of the frame-like structure.

Images