Display device

Abstract

To simplify wiring.SOLUTION: In a display device B1, a first light source unit A1 comprises a first input part (a board 301A and electrodes) to which power for lighting is inputted. A second light source unit A2 comprises a second input part (a board 301B and electrodes) to which power for lighting is inputted. The first input part and the second input part are located at positions overlapping with each other when viewed from a front-back direction of a main body. A wiring member comprises a connector part 7 electrically connected to the first input part and the second input part, and a conductor electrically connecting the connector part 7 to a power supply device.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present disclosure relates to a display device, and more particularly to a display device having display panels on both the front and rear surfaces of a main body. [Background technology]

[0002] As a conventional example, we will explain the emergency exit light (display device) described in Patent Document 1. The emergency exit light described in Patent Document 1 (hereinafter, referred to as the conventional example) is a double-sided light that is directly attached to the ceiling surface of a room, and displays a pattern indicating an emergency exit, etc.

[0003] The conventional example includes a main body, two display units, two lamp holder units, etc. The main body has a main body frame which is a housing, and electrical components such as a terminal block, a battery, and a lighting device built into the inside of the main body frame. The main body frame is a hollow, generally rectangular parallelepiped, and has large openings over almost the entire front and rear faces. The front and rear faces of the main body frame are approximately the same size as the display units, and the front and rear openings of the main body frame are also approximately the same size as the display units.

[0004] The two display units are each positioned so that a pattern indicating an emergency exit, etc. can be seen on the surface. One display unit is located on the front side and one on the back side of the main unit.

[0005] Each of the two lamp holder units has a built-in light source. The lamp holder units are located above the front and rear display units, one each.

[0006] The display unit receives light from a light source built into the lamp holder unit from the upper end, and the light causes printed patterns indicating emergency exits and the like to light up. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2014-17255 A Summary of the Invention [Problem to be solved by the invention]

[0008] However, when one lamp holder unit (light source unit) is provided on each of the front and back sides of the main body, as in the conventional example described in Patent Document 1, there is a high possibility that the wiring that electrically connects the lighting device built into the main body to each lamp holder unit will become complicated.

[0009] An object of the present disclosure is to provide a display device that can simplify wiring. [Means for solving the problem]

[0010] A display device according to an embodiment of the present disclosure includes a first light source unit having a first input section to which power for lighting is input, and a second light source unit having a second input section to which the power for lighting is input. The display device includes a first display panel illuminated by the first light source unit, and a second display panel illuminated by the second light source unit. The display device includes a power supply device that supplies the power for lighting, and a box-shaped main body that holds the first light source unit, the second light source unit, the first display panel, the second display panel, and the power supply device. The display device includes a wiring member that electrically connects the first light source unit and the second light source unit to the power supply device and serves as a power supply path for the power for lighting. The first light source unit and the first display panel are held by the main body so as to cover the front surface of the main body. The second light source unit and the second display panel are held by the main body so as to cover the rear surface of the main body. The first input section and the second input section are in a position that overlaps when viewed from the front-rear direction of the main body. The wiring member has a connector portion electrically connected to the first input portion and the second input portion, and a conductor electrically connecting the connector portion to the power supply device. Effect of the Invention

[0011] The display device according to the present disclosure has an advantage that wiring can be simplified. [Brief description of the drawings]

[0012] [Figure 1] Fig. 1A is a perspective view of a display device according to an embodiment of the present disclosure as viewed from the front and Fig. 1B is a perspective view of the display device as viewed from the rear. [Diagram 2] FIG. 2 is an exploded perspective view of the display device as viewed from the front. [Diagram 3] FIG. 3 is an exploded perspective view of the display device of the above embodiment, with the first display block omitted. [Figure 4] FIG. 4 is an exploded perspective view of a connector portion in the display device. [Diagram 5] FIG. 5 is a perspective view of the first light source unit in the display device as viewed from behind. [Figure 6] FIG. 6 is an exploded perspective view of the first light source unit as viewed from the rear. [Figure 7] 7A, 7B and 7C are front, left and right side views of the light-emitting block in the first light source unit of the embodiment. [Figure 8] FIG. 8 is a perspective view of the main part of the display device, omitting the main body, the housing, the first cover of the connector section, and the like. [Figure 9] FIG. 9 is a cross-sectional view of a main part including a first light source unit and a first display block of the display device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] A display device according to an embodiment of the present disclosure will be described in detail with reference to the drawings. However, each figure described in the following embodiment is a schematic diagram, and the ratio of the size and thickness of each component does not necessarily reflect the actual dimensional ratio. Note that the configuration described in the following embodiment is merely one example of the present disclosure. The present disclosure is not limited to the following embodiment, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0014] (1) Overview of the display device according to the embodiment A display device B1 according to an embodiment of the present disclosure includes a first light source unit A1, a second light source unit A2, a first display panel 20A, a second display panel 20B, a power supply device 11, a main body 1, and a wiring member (see FIG. 2).

[0015] The first display panel 20A is illuminated by the first light source unit A1. The second display panel 20B is illuminated by the second light source unit A2. The power supply device 11 supplies power for lighting to the first light source unit A1 and the second light source unit A2. The main body 1 holds the first light source unit A1, the second light source unit A2, the first display panel 20A, the second display panel 20B, and the power supply device 11. The wiring member electrically connects the first light source unit A1 and the second light source unit A2 to the power supply device 11, and serves as a power supply path for lighting.

[0016] The main body 1 is formed in a box shape. The first light source unit A1 and the first display panel 20A are held by the main body 1 so as to cover the front surface of the main body 1 (see FIG. 1A). The second light source unit A2 and the second display panel 20B are held by the main body 1 so as to cover the rear surface of the main body 1 (see FIG. 1B).

[0017] The first light source unit A1 has a first input section (substrate 301A, electrode 302A) to which power for lighting is input. The second light source unit A2 has a second input section (substrate 301B, electrode 302B) to which power for lighting is input. The first input section and the second input section are positioned to overlap when viewed from the front-rear direction of the main body 1 (see FIG. 2). The wiring member has a connector section 7 electrically connected to the first input section and the second input section, and a conductor (e.g., electric wire 16) that electrically connects the connector section 7 to the power supply device 11.

[0018] Thus, in the display device B1 according to the embodiment, the first input section of the first light source unit A1 and the second input section of the second light source unit A2 are arranged at positions where they overlap when viewed from the front-rear direction of the main body 1. Therefore, in the display device B1 according to the embodiment, the wiring can be simplified compared to a case where the first input section and the second input section are arranged on both ends of the longitudinal direction of the first light source unit A1 and distributed to the main body 1. Here, "simplification of wiring" means shortening the distance (length of wiring) for wiring (electric wire 16) that electrically connects the power supply device 11 to the first light source unit A1 and the second light source unit A2 within the main body 1, reducing wiring (reducing the number of wiring lines), and the like.

[0019] (2) Details of the Display Device According to the Embodiment A display device B1 according to an embodiment (hereinafter, abbreviated as display device B1) will be described with reference to the drawings. The display device B1 described below is a so-called double-sided emergency exit light that is installed at an emergency exit or a passageway to an emergency exit in buildings such as offices and stores, and provides evacuation guidance in two directions, forward and backward. However, the display device according to the embodiment is not limited to emergency exit lights, and may be used, for example, to indicate a specific location (such as a restroom) in a building. In the following description, unless otherwise specified, the up-down, front-back, and left-right directions indicated by arrows in Figs. 1A and 1B are defined as the up-down, front-back, and left-right directions of the display device B1.

[0020] The display device B1 includes a first light source unit A1, a second light source unit A2, a first display block 2A, a second display block 2B, a main body 1, and the like (see FIGS. 1 to 3).

[0021] (2-1) Main unit The main body 1 is made of synthetic resin and formed into a rectangular box shape with an opening on the front side (see FIG. 2). However, the main body 1 may be formed into a box shape with an opening on the rear side, or may be formed into a box shape with no openings on either the front or rear side. The main body 1 houses a power supply device 11 for lighting the first light source unit A1 and the second light source unit A2, a battery unit 13 having a secondary battery, a terminal block 12, a mounting plate 10, a connector portion 7, electric wires 16, etc.

[0022] The upper wall of the main body 1 is provided with a power hole 15 (see Figs. 1 and 2) for pulling in a power cable 6 (see Fig. 3). The power hole 15 opens at approximately the center of the upper wall in the longitudinal direction (left-right direction). The power cable 6 has two power lines 60, and serves as a power supply path for AC power (normal power) supplied from a normal power source (for example, a commercial power system).

[0023] (2-1-1) Mounting plate The mounting plate 10 is formed into a plate shape from a metal material (see FIG. 2). The mounting plate 10 is screwed to the inner bottom surface of the main body 1. The power supply unit 11 and the terminal block 12 are screwed to the mounting plate 10 and housed within the main body 1. The battery unit 13 is detachably attached to the mounting plate 10.

[0024] (2-1-2) Power supply device The power supply device 11 lights up the first light source unit A1 and the second light source unit A2 with normal power supplied from a normal power source, and charges the battery unit 13. Furthermore, during a power outage of the normal power source, the power supply device 11 lights up the first light source unit A1 and the second light source unit A2 with emergency power supplied from the battery unit 13. Note that "charging the battery unit 13" means charging the secondary battery contained in the battery unit 13. Furthermore, "emergency power supplied from the battery unit 13" means DC power discharged from the secondary battery contained in the battery unit 13.

[0025] That is, the power supply device 11 includes a charging circuit for the battery unit 13, and a lighting circuit that lights the first light source unit A1 and the second light source unit A2 with a normal power source. The power supply device 11 further includes an emergency lighting circuit that lights the first light source unit A1 and the second light source unit A2 with an emergency power source, and a case 110 that houses the charging circuit, the lighting circuit, and the emergency lighting circuit (see FIG. 2).

[0026] The case 110 is made of a synthetic resin material and formed into a box shape. The case 110 is housed in the lower right part of the main body 1 and is attached to the mounting plate 10 by screwing. An output terminal unit 111 is provided in the upper right corner of the case 110. The output terminal unit 111 has two terminals, a positive pole and a negative pole. These two terminals are connected to the positive pole and the negative pole of the output terminal of the lighting circuit, respectively.

[0027] (2-1-3) Terminal block The terminal block 12 is made of synthetic resin and has a box shape. The terminal block 12 is disposed in the main body 1 at the upper left side of the power supply device 11, and is attached to the mounting plate 10 by screws.

[0028] Triangular prism-shaped protruding parts 120 are formed on the front surface of the terminal block 12 so as to be aligned in the left-right direction (see FIG. 2). Each protruding part 120 is provided with a plurality of (for example, three) wire insertion holes. Conductors of two power lines 60 of the power cable 6 are inserted one by one into these wire insertion holes (see FIG. 3). The conductors of the power lines 60 inserted into each wire insertion hole are electrically and mechanically connected one by one to a plurality of screwless terminals (quick-connect terminals) housed inside the terminal block 12. In addition, the plurality of screwless terminals are electrically connected to the input terminals of the power supply device 11. In other words, the power lines 60 are electrically connected to the power supply device 11 via the terminal block 12, forming a power supply path for supplying normal power to the power supply device 11.

[0029] (2-1-4) Battery unit The battery unit 13 has a plurality of secondary batteries and a battery case 130 made of synthetic resin that houses the plurality of secondary batteries. The plurality of secondary batteries are, for example, cylindrical nickel-hydrogen secondary batteries. The battery case 130 has a battery connector 131 electrically connected to the plurality of secondary batteries. The battery connector 131 is electrically connected to a receiving connector provided on the case 110 of the power supply device 11 in a removable manner. The battery unit 13 is disposed in the main body 1 at the lower left side of the power supply device 11 (below the terminal block 12) (see FIG. 3).

[0030] (2-1-5) Connector part The connector section 7 has a housing 70 made of synthetic resin, two first contacts 74A, and two second contacts 74B (see FIG. 4). In the following description, the front-rear, left-right, and up-down directions indicated by arrows in FIG. 4 are defined as the front-rear, left-right, and up-down directions of the connector section 7. Note that the front-rear, left-right, and up-down directions of the connector section 7 coincide with the front-rear, left-right, and up-down directions of the display device B1.

[0031] A total of four contacts (two first contacts 74A and two second contacts 74B) are all formed to have the same shape and the same dimensions. The first contact 74A and the second contact 74B each have an inverted U-shaped main body 740, a pair of spring pieces 741 protruding from one end of the main body 740, and a rectangular column-shaped terminal piece 742 protruding from the other end of the main body 740. The main body 740, the pair of spring pieces 741, and the terminal piece 742 are integrally formed by punching and bending a metal plate.

[0032] The housing 70 has a body 71, a first cover 72, and a second cover 73. The body 71 has a first side wall 711, a second side wall 712, a partition wall 713, a central wall 714, and a pair of mounting walls 715.

[0033] The first side wall 711 is formed in a rectangular flat plate shape. Two U-shaped insertion grooves 7110 are provided at each of the upper and lower ends of the first side wall 711 in the center of the first side wall 711 in the longitudinal direction (front-rear direction) so as to be lined up at a distance in the front-rear direction. In addition, two square holes 7111 are provided at each end of the first side wall 711 in the lateral direction (up-down direction) so as to sandwich the two insertion grooves 7110.

[0034] The second side wall 712 is formed in a rectangular flat plate shape. The second side wall 712 is disposed to the right of the first side wall 711 in parallel with the first side wall 711, and is connected to the first side wall 711 by a partition wall 713. The partition wall 713 is formed in a rectangular flat plate shape. The partition wall 713 connects the center of the short side direction of the first side wall 711 and the center of the short side direction of the second side wall 712 over the entire length of the first side wall 711 and the second side wall 712 in the longitudinal direction. That is, the first side wall 711, the second side wall 712, and the partition wall 713 are integrally formed in an H-shape when viewed from the front. A groove 7130 is provided along the front-rear direction at the center in the left-right direction at the front end and the rear end of the partition wall 713.

[0035] The central wall 714 is formed in a flat plate shape, and is provided in the center of the first side wall 711 in the front-rear direction so as to be perpendicular to the first side wall 711, the second side wall 712, and the partition wall 713, respectively.

[0036] Each of the pair of mounting walls 715 is formed in a crank shape when viewed from above. One mounting wall 715 is provided between the front end of the partition wall 713 and the central wall 714 so as to be perpendicular to the first side wall 711, the second side wall 712, and the partition wall 713. The other mounting wall 715 is provided between the rear end of the partition wall 713 and the central wall 714 so as to be perpendicular to the first side wall 711, the second side wall 712, and the partition wall 713. In addition, mounting grooves 7150 having a depth direction in the up-down direction are provided at the upper and lower ends of the pair of mounting walls 715.

[0037] A rectangular columnar support portion 716 is provided on each of the upper and lower surfaces of the partition wall 713, in front of the front mounting wall 715 and behind the rear mounting wall 715. These support portions 716 protrude from the upper and lower surfaces of the partition wall 713 so that their axial directions coincide with the up-down direction.

[0038] The first cover 72 is attached to the first side wall 711 so as to cover the upper surface of the body 71. The first cover 72 is formed in a rectangular flat plate shape. A pair of ribs 720 is provided at the center in the front-rear direction of the left end of the lower surface of the first cover 72. The pair of ribs 720 are arranged at an interval in the front-rear direction and protrude downward. In addition, a pair of claws 721 is provided at the left end of the lower surface of the first cover 72. The pair of claws 721 are formed in an L-shape when viewed from the front. The pair of claws 721 are arranged in the front-rear direction with the pair of ribs 720 in between.

[0039] The second cover 73 is attached to the first side wall 711 so as to cover the lower surface of the body 71. The second cover 73 is formed in a rectangular flat plate shape. A pair of ribs 730 is provided at the center in the front-rear direction of the left end of the upper surface of the second cover 73. The pair of ribs 730 are arranged at an interval in the front-rear direction and protrude upward. In addition, a pair of claws 731 is provided at the left end of the upper surface of the second cover 73. The pair of claws 731 are formed in an L-shape when viewed from the front. The pair of claws 731 are arranged in the front-rear direction with the pair of ribs 730 between them. The first cover 72 and the second cover 73 are formed to have the same shape and the same dimensions.

[0040] The first cover 72 is attached to the body 71 by hooking a pair of claws 721 onto the edges of two holes 7111 on the upper side of the first side wall 711. Similarly, the second cover 73 is attached to the body 71 by hooking a pair of claws 731 onto the edges of two holes 7111 on the lower side of the first side wall 711. Thus, by attaching the first cover 72 and the second cover 73 to the body 71, a rectangular cylindrical housing 70 is formed.

[0041] Here, the front and rear surfaces of the housing 70 each have two sockets open so as to be aligned vertically. A first contact 74A is disposed at the back of each of the two sockets on the front surface. Meanwhile, a second contact 74B is disposed at the back of each of the two sockets on the rear surface. The first contact 74A and the second contact 74B are each attached to the body 71 by fitting the main body portion 740 to the support portion 716 and inserting the terminal piece 742 into the attachment groove 7150 of the attachment wall 715.

[0042] Here, the terminal pieces 742 of the first contact 74A and the second contact 74B housed in the upper stage of the housing 70 are electrically connected to each other by the electric wire 75 (see FIG. 8). Meanwhile, the conductors of the two electric wires 16 are electrically connected to the terminal pieces 742 of the first contact 74A and the terminal pieces 742 of the second contact 74B housed in the lower stage of the housing 70, one each. The conductors of the two electric wires 16 are inserted into the housing 70 through the lower two insertion grooves 7110 of the four insertion grooves 7110 provided in the first side wall 711.

[0043] The connector section 7 is attached to a connector attachment section 18 provided in the upper right corner of the main body 1 (see FIG. 3). The connector attachment section 18 has a pair of engagement pieces 180 protruding leftward from the upper portion of the right wall of the main body 1, and a pair of engagement projections 181 protruding downward from the right end of the upper wall of the main body 1 (see FIG. 3).

[0044] The connector portion 7 is attached to the main body 1 by engaging a pair of engagement pieces 180 with a pair of engagement protrusions 181, one each, of a total of four protrusions 700 protruding from the top and bottom surfaces at both ends of the housing 70 in the longitudinal direction (front-to-back direction) (see Figure 3).

[0045] Thus, the connector portion 7 is attached to the main body 1 so that the opening on the front side of the housing 70 faces the opening of the main body 1, and the opening on the rear side of the housing 70 faces the inner bottom surface of the main body 1. A rectangular window 19 opens in the upper right corner of the inner bottom surface of the main body 1. Therefore, the rear surface of the housing 70 of the connector portion 7 faces the window 19 of the main body 1 (see FIG. 3).

[0046] (2-2) First display block and second display block The first display block 2A has a display panel 20A, a light guide plate 21A, and a holder 22A (see FIG. 2). The second display block 2B has a display panel 20B, a light guide plate 21B, and a holder 22B (see FIG. 2).

[0047] The display panels 20A and 20B are formed in a rectangular flat plate shape from a synthetic resin material having translucency, such as acrylic resin or polycarbonate resin. However, the display panels 20A and 20B may be formed from a material having translucency other than synthetic resin, such as quartz glass. Pictograms for evacuation guidance are displayed on the display surfaces of the display panels 20A and 20B (see FIG. 1A and FIG. 1B).

[0048] The light guide plates 21A and 21B are formed in the shape of a rectangular flat plate from a light-transmitting synthetic resin material such as acrylic resin or polycarbonate resin.

[0049] The light guide plate 21A is disposed behind the display panel 20A so that its front surface faces the rear surface of the display panel 20A (see FIG. 2). Light emitted from the first light source unit A1 is incident on the upper surface (incident surface 210) of the light guide plate 21A. The light incident on the incident surface 210 is guided inside the light guide plate 21A and emitted from the front surface (exit surface 211) of the light guide plate 21A. The display panel 20A is illuminated by the light exiting from the exit surface 211 of the light guide plate 21A.

[0050] The light guide plate 21B is disposed in front of the display panel 20B such that its rear surface faces the front surface of the display panel 20B (see FIG. 2). Light emitted from the second light source unit A2 is incident on the upper surface (incident surface 210) of the light guide plate 21B. The light incident on the incident surface 210 is guided inside the light guide plate 21B and emitted from the front surface (exit surface 211) of the light guide plate 21B. The display panel 20B is illuminated by the light exiting from the exit surface 211 of the light guide plate 21B.

[0051] The holder 22A is made of a non-transparent synthetic resin material and is formed into a rectangular box shape with an open front and top. The holder 22A holds the display panel 20A and the light guide plate 21A such that the display panel 20A is disposed in front of the light guide plate 21A (see FIG. 2).

[0052] The holder 22B is made of a non-transparent synthetic resin material and is formed in a rectangular box shape with an open rear and top. The holder 22B holds the display panel 20B and the light guide plate 21B such that the display panel 20B is disposed in front of the light guide plate 21B (see FIG. 2).

[0053] The first display block 2A is attached to the main body 1 so as to cover the remaining part of the opening of the main body 1 except for the upper part where the first light source unit A1 is attached (see FIG. 1A). The second display block 2B is attached to the main body 1 so as to cover the remaining part of the rear surface of the main body 1 except for the upper part where the second light source unit A2 is attached (see FIG. 1B).

[0054] (2-3) First light source unit and second light source unit The first light source unit A1 and the second light source unit A2 have the same basic structure. Therefore, the first light source unit A1 will be described below with reference to Figs. 5 to 7, and the second light source unit A2 will be described only in terms of its differences from the first light source unit A1. In the following description, the components of the first light source unit A1 are marked with the letter "A" and the components of the second light source unit A2 are marked with the letter "B" after the numbers used to distinguish the components common to the first light source unit A1 and the second light source unit A2.

[0055] The first light source unit A1 has a light-emitting block 3A, a light guide 5A, and a housing 4A (see Figs. 5 and 6). In the following description, unless otherwise specified, the up-down, front-back, and left-right directions indicated by arrows in Fig. 6 are defined as the up-down, front-back, and left-right directions of the first light source unit A1. The up-down, front-back, and left-right directions of the first light source unit A1 coincide with the up-down, front-back, and left-right directions of the display device B1.

[0056] (2-3-1) Illumination block The light emitting block 3A has a light emitting portion 30A, a heat dissipation member 31A, a fixture 32A, and a heat conductive member 33A (see FIGS. 6 and 7).

[0057] The light emitting unit 30A has an LED 300A which is a solid-state light source, and a substrate 301A on which the LED 300A is mounted. The LED 300A is, for example, a packaged white LED for lighting. The substrate 301A is a printed wiring board formed in a substantially T-shape when viewed from the left and right direction (see Figs. 6 and 7B). The LED 300A is mounted on the surface of the wide portion of the substrate 301A. A pair of electrodes 302A is formed on both the front and back sides of the narrow portion of the substrate 301A. The pair of electrodes 302A are electrically connected to the anode and cathode of the LED 300A, one by one, via the printed wiring of the substrate 301A.

[0058] The heat dissipation member 31A has a heat dissipation plate 310A, a joint portion 311A ​​that is thermally coupled to the rear surface of the substrate 301A, and two protrusions 312A. The heat dissipation plate 310A and the joint portion 311A ​​are each formed in a rectangular flat plate shape. However, the heat dissipation plate 310A is formed to be sufficiently larger than the substrate 301A, and the joint portion 311A ​​is formed to be smaller than the substrate 301A. The joint portion 311A ​​is formed integrally with the heat dissipation plate 310A so as to protrude in the thickness direction (front-rear direction) of the heat dissipation plate 310A. In other words, the heat dissipation member 31A is formed in a substantially L-shape by the heat dissipation plate 310A and the joint portion 311A ​​(see FIG. 6).

[0059] Each of the two protrusions 312A is formed integrally with the heat sink 310A by cutting and raising a part of the heat sink 310A (see FIGS. 6 and 7A). When viewed from the front-rear direction, each of the protrusions 312A is formed in a substantially trapezoidal shape. One end of each of the protrusions 312A (a portion corresponding to the lower base of the trapezoid) is connected to the heat sink 310A. Each of the protrusions 312A is configured to be displaceable (flexible) in the front-rear direction with the one end connected to the heat sink 310A as a fulcrum.

[0060] Also, one rectangular hole 313A is provided at the center of each of the short sides (up-down direction) and long sides (left-right direction) of the heat dissipation plate 310A (see FIGS. 6 and 7A). These two holes 313A each penetrate the heat dissipation plate 310A in the thickness direction (front-rear direction).

[0061] The heat conductive member 33A is formed, for example, in a rectangular shape from a sheet-like silicone resin (see FIG. 6). The heat conductive member 33A is interposed between the joint 311A ​​and the substrate 301A, and thermally couples the joint 311A ​​and the substrate 301A. In other words, heat generated in the LED 300A is conducted from the substrate 301A to the heat dissipation member 31A via the heat conductive member 33A.

[0062] Fixing device 32A has a main body 320A, a first protruding piece 321A, a second protruding piece 322A, a pair of pressing parts 323A, and a pair of claws 324A (see Figs. 6 and 7). Note that main body 320A, first protruding piece 321A, second protruding piece 322A, pressing part 323A, and pair of claws 324A are integrally formed from a synthetic resin material.

[0063] The main body 320A is formed in a U-shape. Each of the pair of claws 324A is formed in a pyramidal shape. The pair of claws 324A is provided on the inner surface of each end of the main body 320A, one on each side.

[0064] The first protrusion 321A is formed in a rectangular flat plate shape. The first protrusion 321A faces the front end of the main body 320A (see FIG. 7C). The second protrusion 322A is formed in a C-shape in a plan view (see FIG. 6). The second protrusion 322A faces the rear end of the main body 320A (see FIG. 7C). The first protrusion 321A and the second protrusion 322A each protrude in the same direction as both ends of the main body 320A (to the right in FIG. 6).

[0065] Each of the pair of pressing parts 323A is formed in a rectangular parallelepiped shape (see FIG. 6). The pair of pressing parts 323A protrude from the inner surface (left side surface) of the main body part 320A.

[0066] Thus, the fixture 32A places the coupling portion 311A ​​between the first protrusion 321A and the second protrusion 322A, and hooks the pair of claws 324A one by one onto the upper end and the lower end of the substrate 301A, thereby fixing the light emitting portion 30A to the heat dissipation member 31A (see FIG. 7B). The fixture 32A uses the pair of pressing portions 323A to push the coupling portion 311A ​​in a direction approaching the substrate 301A (to the left), thereby increasing the degree of adhesion between the coupling portion 311A ​​and the substrate 301A and the heat conductive member 33A.

[0067] The light-emitting block 3B of the second light source unit A2 has the same configuration as the light-emitting block 3A of the first light source unit A1.

[0068] (2-3-2) Light guide The light guide 5A is formed into a square prism shape from a light-transmitting synthetic resin material such as acrylic resin or polycarbonate resin (see FIG. 6). However, the shape of the light guide 5A is not limited to a square prism shape, and may be a square pyramid shape or a square frustum shape.

[0069] Of the two bottom surfaces (left and right bottom surfaces) facing each other in the longitudinal direction (axial direction) of the light guide 5A, one bottom surface (right bottom surface) serves as the incident surface 50A. In addition, of the four side surfaces (front, rear, top, and bottom surfaces) of the light guide 5A, one side surface (bottom surface) serves as the emission surface 51A. Furthermore, a number of grooves 54A are provided on the side surface (top surface) of the light guide 5A facing the emission surface 51A (see FIG. 8). These grooves 54A are arranged in parallel such that the interval between adjacent grooves 54A becomes narrower as the distance from the incident surface 50A increases.

[0070] Of the four side surfaces of the light guide 5A, a plurality of (four in the illustrated example) fitting portions 53A are provided on two side surfaces 52A (front and rear surfaces) adjacent to the emission surface 51A. Two of the four fitting portions 53A are provided on each of the two side surfaces 52A. Of the two fitting portions 53A provided on each side surface 52A, the two fitting portions 53A closer to the incident surface 50A may be referred to as first fitting portions 53AA, and the two fitting portions 53A farther from the incident surface 50A may be referred to as second fitting portions 53AB.

[0071] The two first fitting portions 53AA are formed in the shape of a quadrangular prism with a trapezoidal bottom surface, however, the upper surfaces of the two first fitting portions 53AA form smaller angles with the side surface 52A than the lower surfaces of the two first fitting portions 53AA.

[0072] Each of the two second fitting portions 53AB has a rectangular prism-shaped projection 530A with a trapezoidal bottom surface and a rectangular parallelepiped protrusion 531A extending straight up from the top end of projection 530A (see FIG. 6). The top surface of protrusion 531A is a downwardly inclined surface.

[0073] (2-3-3) Housing The housing 4A has a front wall 40A, an upper wall 41A, a pair of side walls 42A, a storage section 43A, an attachment section 44A, a plurality of positioning sections 45A, a pair of attachment pieces 46A, and a pair of support pieces 47A (see FIG. 6). The front wall 40A is formed in a rectangular flat plate shape. The upper wall 41A is formed in a rectangular flat plate shape and protrudes rearward from the upper end of the front wall 40A. The pair of side walls 42A are each formed in a rectangular flat plate shape and protrude rearward from both left and right ends of the front wall 40A. The upper ends of the pair of side walls 42A are connected to both ends in the longitudinal direction of the upper wall 41A. In other words, the housing 4A is formed in a long box shape with an open rear and lower faces by the front wall 40A, the upper wall 41A, and the pair of side walls 42A.

[0074] The housing 43A is formed in a long box shape with the front, bottom, and right side open (see FIG. 6). The housing 43A houses the light guide 5A with the incident surface 50A exposed from the right side and the exit surface 51A exposed from the bottom (see FIGS. 5 and 6).

[0075] The housing 43A has a rear plate 430A, an upper plate 431A, a front plate 432A, and a side plate 433A (see FIG. 6). The rear plate 430A is formed in a long rectangular shape slightly shorter than the front wall 40A of the housing 4A, and faces the front wall 40A in the front-rear direction (see FIG. 6). The upper plate 431A is formed in a long rectangular shape whose longitudinal length is almost equal to that of the rear plate 430A, and protrudes forward from the upper end of the rear plate 430A (see FIG. 9). The side plate 433A is formed in a rectangular flat plate shape, and is connected to the left end faces of the rear plate 430A and the upper plate 431A (see FIG. 6). A rib 4330 protrudes rightward from the front end of the side plate 433A. The distance between the rear plate 430A and the rib 4330 in the front-rear direction is slightly larger than the thickness of the light guide 5A in the front-rear direction.

[0076] Here, two mating portions 4300 are provided on the rear plate 430A (see FIG. 6). Each of the two mating portions 4300 is formed as a rectangular hole. The two mating portions 4300 are mated with mating portions (first mating portion 53AA, second mating portion 53AB) provided on the rear side surface 52A of the light guide 5A, respectively.

[0077] The front plate 432A is formed in a rectangular flat plate shape. The front plate 432A protrudes downward from the right end of the upper plate 431A so as to face the rear plate 430A (see FIG. 6). The length of the front plate 432A in the longitudinal direction (left-right direction) is shorter than the length of the heat dissipation plate 310A in the longitudinal direction (see FIG. 6).

[0078] The attachment portion 44A has a pair of protrusions 440, a pressing piece 441, a contact piece 442, and a fitting portion, and is configured to attach the light emitting block 3A to the housing 4A (see FIG. 6).

[0079] The pair of protrusions 440 are provided on the inner surface (left side surface) of the right side wall 42A of the pair of side walls 42A (see FIG. 6). The pair of protrusions 440 are formed in a columnar shape with the axial direction being the up-down direction. The pair of protrusions 440 protrude from the inner surface of the side wall 42A so as to be aligned in parallel at a fixed interval in the front-rear direction.

[0080] The pressing piece 441 is formed in an L-shape when viewed from the top-bottom direction. The pressing piece 441 is formed integrally with the right side wall 42A so as to protrude rearward and leftward from the rear end of the inner surface of the right side wall 42A (see FIG. 6).

[0081] The abutment piece 442 is provided on the right end of the rear plate 430A (see FIG. 6). The abutment piece 442 is formed in an L-shape when viewed from the top-bottom direction, and is formed integrally with the rear plate 430A so as to protrude rearward and rightward from the right end of the rear plate 430A (see FIG. 6).

[0082] The fitting portion is provided at the upper right end of the rear surface of the front wall 40 A. The fitting portion is formed in a triangular prism shape.

[0083] The positioning portions 45A (two in this embodiment) are provided on both the left and right sides of the rear surface of the rear plate 430A (see FIG. 6). Each positioning portion 45A has a pair of rectangular parallelepipeds. The pair of rectangular parallelepipeds protrude rearward from the rear surface of the rear plate 430A so that their axial directions coincide with the up-down direction and they are arranged in parallel with each other with a certain gap between them. The width of the gap in each positioning portion 45A is slightly larger than the left-right width of the fitting portion 53A of the light guide 5A.

[0084] The right fitting portion 53A (first fitting portion 53AA) on the front side surface 52A of the light guide 5A fits into the gap of the right positioning portion 45A. The left fitting portion 53A (second fitting portion 53AB) on the front side surface 52A of the light guide 5A fits into the gap of the left positioning portion 45A. In other words, the two positioning portions 45A serve to position the light guide 5A accommodated in the accommodation portion 43A in the left-right direction with respect to the housing 4A.

[0085] The pair of support pieces 47A protrude rearward, one each from the left and right ends of the upper wall 41A. The pair of mounting pieces 46A protrude rearward, one each from the left and right ends of the upper wall 41A. However, each mounting piece 46A is located inward of each support piece 47A (see FIG. 6).

[0086] The housing 4B of the second light source unit A2 (see FIG. 1B) is a mirror image of the housing 4A of the first light source unit A1. That is, in the housing 4B of the second light source unit A2, the storage section is left-right inverted from the storage section 43A, and the left-right position of the attachment section is opposite to the left-right position of the attachment section 44A.

[0087] (2-4) Light source unit assembly procedure Next, the assembly procedure of the first light source unit A1 will be described. However, the assembly procedure of the light emitting block 3A will not be described. In addition, the assembly procedure described below is an example, and the order of some steps can be changed.

[0088] First, an assembly worker inserts the light guide 5A into the housing 43A from the lower surface of the housing 43A by inserting the first fitting portion 53AA and the second fitting portion 53AB on the front side surface 52A of the light guide 5A into the gaps between the two positioning portions 45A. When the upper ends of the first fitting portion 53AA and the second fitting portion 53AB on the rear side surface 52A of the light guide 5A hit the lower end of the rear plate 430A of the housing 43A, the rear plate 430A is bent backward. Eventually, the first fitting portion 53AA and the second fitting portion 53AB are fitted into the two fitted portions 4300 provided on the rear plate 430A, respectively, and the rear plate 430A returns to its original state.

[0089] In this manner, the worker accommodates the light guide 5A in the accommodation portion 43A of the housing 4A. The two fitting portions 53A (the first fitting portion 53AA and the second fitting portion 53AB) of the light guide 5A accommodated in the accommodation portion 43A are fitted into the two fitted portions 4300, respectively, to prevent the light guide 5A from falling off the accommodation portion 43A.

[0090] Next, the worker attaches the light-emitting block 3A to the attachment portion 44A of the housing 4A. That is, the worker inserts the light-emitting unit 30A, the fixture 32A, and the joint portion 311A ​​of the heat dissipation member 31A from below the housing 4A between the right side wall 42A and the right end of the rear plate 430A. At this time, the worker inserts the main body portion 320A of the fixture 32A between the pair of protrusions 440. At the same time, the worker inserts the heat dissipation plate 310A of the heat dissipation member 31A from below the housing 4A into the gap between the front wall 40A and the front plate 432A.

[0091] Then, the upper end of the heat dissipation plate 310A passes over the fitting portion, and the fitting portion fits into the upper hole 313A of the heat dissipation plate 310A, thereby preventing the heat dissipation member 31A from coming off the housing 4A. In addition, the pair of protrusions 440, the pressing piece 441, and the abutting piece 442 of the mounting part 44A restrict the movement of the fixing tool 32A in the front-rear and left-right directions. In this way, the worker can mount the light-emitting block 3A to the mounting part 44A.

[0092] In this manner, the assembly of the first light source unit A1 is completed. In the assembled first light source unit A1, the narrow end portion (the portion where the electrode 302A is provided, hereinafter sometimes referred to as the first input portion) of the substrate 301A of the light-emitting portion 30A protrudes rearward beyond the pressing piece 441 of the housing 4A (see FIG. 5).

[0093] The worker can assemble the second light source unit A2 in the same manner as for the first light source unit A1.

[0094] (2-5) Display device installation procedure Next, a procedure for installing the display device B1 will be described.

[0095] First, the worker performing the installation work pulls in the power cable 6 from the power hole 15 in the wall above the main body 1 from which the first light source unit A1 and the first display block 2A have been removed, and then screws the main body 1 to the ceiling.

[0096] Next, the worker inserts each conductor of the two power lines 60 of the power cable 6 pulled in from the power hole 15 into two wire insertion holes provided in the protruding portion 120 of the terminal block 12, electrically connecting the power cable 6 to the terminal block 12.

[0097] Then, the worker attaches the first display block 2A to the front surface of the main body 1.

[0098] Finally, the worker hooks the claws provided at the tips of the pair of mounting pieces 46A onto the edge of a hole provided on the upper surface of the main body 1, and inserts the narrow end (first input section) of the board 301A into the front opening of the connector section 7 of the main body 1 (see FIG. 8). The narrow end of the board 301A is inserted between the pair of spring pieces 741 of each of the two first contacts 74A housed in the front half of the housing 70. The pair of spring pieces 741 of the upper first contact 74A contacts and conducts with the upper electrode 302A of the two electrodes 302A of the first input section. The pair of spring pieces 741 of the lower first contact 74A contacts and conducts with the lower electrode 302A of the two electrodes 302A of the first input section. In other words, the two first contacts 74A housed in the front half of the housing 70 of the connector section 7 are electrically connected to the light emitting section 30A of the first light source unit A1.

[0099] In this manner, the installation of the display device B1 is completed.

[0100] In addition, the narrow end (second input section) of the substrate 301B of the second light source unit A2 is inserted into the rear opening of the connector section 7 (see FIG. 8). The narrow end of the substrate 301B is inserted between a pair of spring pieces 741 of each of the two second contacts 74B housed in the rear half of the housing 70. The pair of spring pieces 741 of the upper second contact 74B contacts and conducts with the upper electrode 302B of the two electrodes 302B of the second input section. The pair of spring pieces 741 of the lower second contact 74B contacts and conducts with the lower electrode 302B of the two electrodes 302B of the second input section. In other words, the two second contacts 74B housed in the rear half of the housing 70 of the connector section 7 are electrically connected to the light emitting section 30B of the second light source unit A2.

[0101] (3) Advantages of the display device according to the embodiment As described above, in the display device B1, the first input section of the first light source unit A1 protrudes toward the rear surface of the main body 1 from one end (right end) in the longitudinal direction (left-right direction) along the front surface of the main body 1. On the other hand, the second input section of the second light source unit A2 protrudes toward the front surface of the main body 1 from one end (left end when viewed from the rear) that overlaps with one end (right end) in the longitudinal direction of the first light source unit A1 when viewed from the front-rear direction of the main body 1. The main body 1 accommodates a connector section 14 that is electrically connected to the first input section and the second input section, and two electric wires 16 that electrically connect the connector section 14 to the power supply device 11. In other words, the first light source unit A1 and the second light source unit A2 are reversed in the arrangement of the accommodation sections 43A, 43B, the attachment sections 44A, 44B, the light-emitting blocks 3A, 3B, etc. relative to the housings 4A, 4B in the longitudinal direction (left-right direction) of the housings 4A, 4B when viewed from the front of each of them. In other words, the first light source unit A1 and the second light source unit A2 are in a mirror image relationship with each other.

[0102] For example, if the two light source units have completely identical configurations, the input section of the light source unit attached to the front of the main body 1 will be located at the right end of the main body 1, and the input section of the light source unit attached to the rear of the main body 1 will be located at the left end of the main body 1. In this case, multiple electric wires that serve as power supply paths from the power supply device 11 to the front light source unit and the rear light source unit will be routed from the power supply device 11 to the upper right corner and the upper left corner of the main body 1, respectively, making the routing of wiring within the main body 1 cumbersome.

[0103] In contrast, in the display device B1, the first input section of the first light source unit A1 and the second input section of the second light source unit A2 are arranged to the right side of the main body 1, so that the connector section 7 can be arranged in the upper right corner of the main body 1. As a result, in the display device B1, the wiring that electrically connects the power supply device 11 to the first light source unit A1 and the second light source unit A2 can be simplified. However, the first input section of the first light source unit A1 and the second input section of the second light source unit A2 only need to be in a position where they overlap when viewed from the front-rear direction of the main body 1, and may be arranged at the left end of the first light source unit A1 or in the center in the left-right direction, for example. Furthermore, the conductor that electrically connects the power supply device 11 and the connector section 7 is not limited to the electric wire 16, and may be a conductor (copper foil) formed on a printed wiring board, or a lead formed of a metal plate.

[0104] Furthermore, in the display device B1, the first light source unit A1 and the second light source unit A2 are electrically connected to the power supply device 11 by one connector section 7. Therefore, the display device B1 can reduce wiring by wiring between the power supply device 11 and the connector section 7 by two electric wires 16, compared to a case in which the display device B1 has two connector sections, a connector section for the first light source unit A1 and a connector section for the second light source unit A2.

[0105] Here, the first input section and the second input section have the same structure, and are connected to the connector section 7 in a state rotated 180°. Therefore, the electrode 302A of the first input section connected to the first contact 74A in the upper row and the electrode 302B of the second input section connected to the second contact 74B in the upper row have opposite positive and negative polarities. Therefore, by electrically connecting the first contact 74A in the upper row and the second contact 74B in the upper row, the two light-emitting sections 30A and 30B are electrically connected in series between the first contact 74A in the lower row and the second contact 74B in the lower row.

[0106] The two light-emitting units 30A and 30B are supplied with a direct current from the power supply device 11 via the lower first contact 74A and the lower second contact 74B. In other words, the display device B1 has an advantage that the same direct current flows through the two light-emitting units 30A and 30B, thereby suppressing the occurrence of a difference in the amount of light emitted by each of the light-emitting units 30A and 30B. Note that the upper first contact 74A and the upper second contact 74B may be integrally formed, and the terminal pieces 742 of the contacts 74A and 74B may be directly connected to each other without the electric wire 75.

[0107] Furthermore, by arranging the connector portion 7 only at the right end of the main body 1, the left ends of the light guides 5A and 5B can be brought closer to the left side surface of the main body 1. In other words, the display device B1 can illuminate up to the ends of the display panels 20A and 20B (the ends opposite the light emitting units 30A and 30B) by bringing the end faces opposite the incident surface 50A of the light guide 5A of the first light source unit A1 and the light guide 5B of the second light source unit A2 closer to the side surface (left side surface) of the main body 1. As a result, the display device B1 can reduce unevenness in brightness of the display surfaces of the display panels 20A and 20B.

[0108] Incidentally, in the display device B1, the power supply device 11 is supported on the main body 1, shifted from the center to the right in the left-right direction of the main body 1. Therefore, in the display device B1, the electric wire 16 connecting the power supply device 11 and the connector section 7 can be shortened. Furthermore, in the display device B1, the output terminal section 111 of the power supply device 11 is provided in the upper right corner on the front surface of the case 110, so that the electric wire 16 can be further shortened.

[0109] Furthermore, in the display device B1, the terminal block 12 connected to the power cable 6 is disposed on the other end (left end) side of the first light source unit A1 in the longitudinal direction relative to the power supply device 11. In other words, the display device B1 is supported by the main body 1 so that the terminal block 12 is separated from the output terminal portion 111 of the power supply device 11, and when the power line 60 is connected to the terminal block 12, the power cable 6 and the electric wire 16 can be wired separately within the main body 1. As a result, the display device B1 can simplify the work of routing the power cable 6 during installation.

[0110] Here, in the display device B1, the main body 1 has a plurality of (three) support parts 17 (see FIG. 3) that support two electric wires 16 along the right wall of the main body 1. These support parts 17 are formed in plate shapes with grooves, and support the electric wires 16 by sandwiching the electric wires 16 in each groove.

[0111] Since the display device B1 has a support portion 17 that supports the electric wire 16 along the wall on the side (right side) where the connector portion 7 is located, the work of routing the power cable 6 during installation can be further simplified.

[0112] (4) Summary A display device (B1) according to a first embodiment of the present disclosure includes a first light source unit (A1), a second light source unit (A2), a first display panel (20A), and a second display panel (20B). The display device (B1) according to the first embodiment further includes a power supply device (11), a main body (1), and wiring members (connector portion 7, terminal block 12, electric wires 16). The first display panel (20A) is illuminated by the first light source unit (A1). The second display panel (20B) is illuminated by the second light source unit (A2). The power supply device (11) supplies power for lighting to the first light source unit (A1) and the second light source unit (A2). The main body (1) holds the first light source unit (A1), the second light source unit (A2), the first display panel (20A), the second display panel (20B), and the power supply device (11). The wiring member electrically connects the first light source unit (A1) and the second light source unit (A2) to the power supply device (11) and serves as a power supply path for lighting. The main body (1) is formed in a box shape. The first light source unit (A1) and the first display panel (20A) are held by the main body (1) so as to cover the front surface of the main body (1). The second light source unit (A2) and the second display panel (20B) are held by the main body (1) so as to cover the rear surface of the main body (1). The first light source unit (A1) has a first input section (substrate 301A, electrode 302A) to which lighting power is input. The second light source unit (A2) has a second input section (substrate 301B, electrode 302B) to which power for lighting is input. The first input section and the second input section are positioned to overlap when viewed from the front-rear direction of the main body (1). The wiring member has a connector section (7) electrically connected to the first input section and the second input section, and a conductor (electric wire 16) electrically connecting the connector section (7) to the power supply device (11).

[0113] The display device (B1) of the first aspect allows for simplified wiring compared to a case in which the first input section and the second input section are arranged on the main body (1) by distributing them to both ends of the longitudinal direction of the first light source unit (A1).

[0114] A display device (B1) according to a second aspect of the present disclosure can be realized by combining with the first aspect. In the display device (B1) according to the second aspect, the first input unit preferably protrudes from one end in the longitudinal direction along the front surface of the main body (1) toward the rear surface. The second input unit preferably protrudes from one end overlapping one end in the longitudinal direction of the first light source unit (A1) toward the front surface when viewed from the front-rear direction of the main body (1).

[0115] In the display device (B1) of the second aspect, the first input section and the second input section are positioned so as to overlap one longitudinal end of the first light source unit (A1), making it easier to secure space in the main body (1) for arranging the wiring members.

[0116] A display device (B1) according to a third aspect of the present disclosure can be realized by combining with the first or second aspect. In the display device (B1) according to the third aspect, the connector portion (7) preferably has a first contact (74A), a second contact (74B), and a housing (70). The first contact (74A) is preferably electrically connected to the first input portion. The second contact (74B) is preferably electrically connected to the second input portion. The housing (70) preferably accommodates the first contact (74A) and the second contact (74B).

[0117] The display device (B1) of the third aspect can reduce wiring by electrically connecting the first light source unit (A1) and the second light source unit (A2) to the power supply device (11) through a single connector portion (7).

[0118] A display device (B1) according to a fourth aspect of the present disclosure can be realized by combining with the third aspect. In the display device (B1) according to the fourth aspect, the connector portion (7) preferably has two first contacts (74A) and two second contacts (74B). The wiring member preferably has one conductor (wire 16) electrically connected to one of the first contacts (74A) and another conductor (wire 16) electrically connected to one of the second contacts (74B). It is preferable that the other first contact (74A) and the other second contact (74B) are electrically connected.

[0119] The display device (B1) according to the fourth aspect can electrically connect the first light source unit (A1) and the second light source unit (A2) in series to the power supply device (11) via the connector portion (7) and two conductors. Therefore, the display device (B1) according to the fourth aspect can pass the same direct current from the power supply device (11) to the first light source unit (A1) and the second light source unit (A2). As a result, the display device (B1) according to the fourth aspect can suppress the occurrence of a difference between the amount of light emitted by the first light source unit (A1) and the amount of light emitted by the second light source unit (A2).

[0120] A display device (B1) according to a fifth embodiment of the present disclosure can be realized by combining with the fourth embodiment. In the display device (B1) according to the fifth embodiment, it is preferable that the other first contact (74A) and the other second contact (74B) are directly connected to each other.

[0121] The display device (B1) according to the fifth aspect can simplify the structure of the connector portion (7) to reduce the manufacturing cost.

[0122] A display device (B1) according to a sixth aspect of the present disclosure can be realized by combining with any one of the second to fifth aspects. In the display device (B1) according to the sixth aspect, it is preferable that the power supply device (11) is supported by the main body (1) near one end of the first light source unit (A1) in the longitudinal direction when viewed from the front-rear direction of the main body (1).

[0123] The display device (B1) according to the sixth aspect can reduce the length of the electric wires (16) connecting the power supply device (11) and the first light source unit (A1).

[0124] A display device (B1) according to a seventh aspect of the present disclosure can be realized by combining with the sixth aspect. In the display device (B1) according to the seventh aspect, the power supply device (11) preferably has an output terminal (output terminal portion 111) electrically connected to a conductor. In the power supply device (11), the output terminal is preferably disposed close to one end of the first light source unit (A1) in the longitudinal direction when viewed from the front-rear direction of the main body (1).

[0125] In the display device (B1) of the seventh aspect, the output terminal of the power supply device (11) is arranged close to one longitudinal end of the first light source unit (A1), thereby enabling further shortening of the conductor (electric wire 16).

[0126] A display device (B1) according to an eighth aspect of the present disclosure can be realized by combining with the seventh aspect. The display device (B1) according to the eighth aspect preferably further includes a terminal block (12) to which a power line (60) that serves as a power supply path from an external power source to the power supply device (11) is electrically connected. The terminal block (12) is preferably disposed on the other end side of the first light source unit (A1) in the longitudinal direction relative to the power supply device (11) when viewed from the front-rear direction of the main body (1).

[0127] The display device (B1) according to the eighth aspect is supported on the main body (1) so that the terminal block (12) is spaced from the output terminal of the power supply device (11), and when the power line (60) is connected to the terminal block (12), the power line (60) and the conductor (electric wire 16) can be wired separately within the main body (1). As a result, the display device (B1) according to the eighth aspect can simplify the work of routing the power line (60) during installation.

[0128] A display device (B1) according to a ninth aspect of the present disclosure can be realized by combining with any one of the second to eighth aspects. In the display device (B1) according to the ninth aspect, the conductor is preferably an electric wire (16) covered with an insulator. The main body (1) preferably has a support part (17) for supporting the electric wire (16). The support part (17) is preferably disposed close to one end of the first light source unit (A1) in the longitudinal direction when viewed from the front-rear direction of the main body (1).

[0129] The display device (B1) of the ninth aspect has a support portion (17) for supporting the electric wire (16) near the side where the first input portion and the second input portion are arranged, thereby further simplifying the work of routing the power line (60) during installation.

[0130] A display device (B1) according to a tenth aspect of the present disclosure can be realized by combining with any one of the first to ninth aspects. The display device (B1) according to the tenth aspect preferably further comprises a secondary battery held in the main body (1). The power supply device (11) is preferably configured to generate power for lighting using normal power supplied from a normal power source, and to charge the secondary battery using the normal power.

[0131] The display device (B1) according to the tenth aspect can realize an emergency exit light that provides illumination in an emergency. [Explanation of symbols]

[0132] B1 Display device A1 First light source unit A2 Second light source unit 1 Main unit 7 Connector part (wiring material) 11 Power supply 12 Terminal block (wiring material) 16 Electric wire (wiring material; conductor) 17 Support part 60 Power line 70 Housing 74A 1st Contact 74B 2nd Contact 20A First display panel 20B Second display panel 111 Output terminal section (output terminal) 301A Board (First Input Section) 301B Board (second input section) 302A Electrode (first input section) 302B Electrode (second input section)

Claims

1. a first light source unit having a first input section to which lighting power is input; a second light source unit having a second input section to which the lighting power is input; a first display panel illuminated by the first light source unit; a second display panel illuminated by the second light source unit; A power supply device that supplies power for the lighting; a box-shaped main body that holds the first light source unit, the second light source unit, the first display panel, the second display panel, and the power supply device; a wiring member that electrically connects the first light source unit and the second light source unit to the power supply device and serves as a power supply path for the lighting; Equipped with the first light source unit and the first display panel are held by the main body so as to cover a front surface of the main body; the second light source unit and the second display panel are held by the main body so as to cover a rear surface of the main body; the first input portion and the second input portion are positioned so as to overlap when viewed from the front-rear direction of the main body, The wiring member is a connector portion electrically connected to the first input portion and the second input portion; a conductor electrically connecting the connector portion to the power supply device; having Display device.

2. The first input portion protrudes from one end of the main body in a longitudinal direction along the front surface toward the rear surface, The second input portion protrudes toward the front surface from one end overlapping one end of the first light source unit in a longitudinal direction when viewed from the front-rear direction of the main body. The display device according to claim 1.

3. The connector portion includes: A first contact electrically connected to the first input portion; A second contact electrically connected to the second input portion; a housing that accommodates the first contact and the second contact; having 3. The display device according to claim 1 or 2.

4. the connector portion includes two each of the first contacts and the second contacts, The wiring member is one of the conductors electrically connected to one of the first contacts; Another one of the conductors electrically connected to one of the second contacts; having the other first contact and the other second contact are electrically connected to each other; The display device according to claim 3.

5. the other first contact and the other second contact are directly connected to each other; The display device according to claim 4.

6. The power supply device is supported by the main body toward one end of the first light source unit in a longitudinal direction when viewed from the front-rear direction of the main body. The display device according to any one of claims 2 to 5.

7. the power supply device has an output terminal electrically connected to the conductor; The output terminal is disposed near one end of the first light source unit in the longitudinal direction when viewed from the front-rear direction of the main body in the power supply device. The display device according to claim 6.

8. a terminal block to which a power line that serves as a power supply path from an external power source to the power supply device is electrically connected; The terminal block is disposed on the other end side of the first light source unit in the longitudinal direction relative to the power supply device when viewed from the front-rear direction of the main body. The display device according to claim 7.

9. The conductor is an electric wire covered with an insulator, The main body has a support portion that supports the electric wire, The support portion is disposed toward one end of the first light source unit in a longitudinal direction when viewed from the front-rear direction of the main body. The display device according to any one of claims 2 to 8.

10. The device further includes a secondary battery held in the main body, The power supply device is configured to generate power for lighting using normal power supplied from a normal power source, and to charge the secondary battery using the normal power. The display device according to any one of claims 1 to 9.

Images