Display device

Abstract

To provide a display device which can be downsized while enabling visual confirmation of light showing the state of the device of itself from the outside.SOLUTION: The display device includes a display unit 20 having a flat shape and a display panel 22 arranged on the +Z-direction side, a base plate on which an electronic component constituting a power supply circuit arranged in opposition to the -Z-direction side of the display unit 20 for supplying electric power to the display unit 20 and a light emission part for emitting light in a form responding to the state of the device of itself are packaged, and a light guide rod 141 which is long, and has one end in the longitudinal direction arranged in opposition to the light emission part and the other end arranged on the outer periphery part of the display unit 20 when viewing the display unit 20 in a Z-axis direction, for emitting light input from the light emission part to one end and propagated to the other end, from the other end in a direction where the +Z-direction side of the display unit 20 faces.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a display device. [Background technology]

[0002] An emergency light has been proposed that includes a housing having a frame and a through-hole provided in the frame, a power supply unit housed in the housing, an inspection case attached to the through-hole in the housing, and an inspection board housed in the inspection case, with a monitor lamp mounted on the inspection board that displays the status of the storage battery and light source, including whether they are normal or abnormal, by displaying in a manner that is on, off, flashing, etc. (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-024248 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when the display device described in Patent Document 1 is embedded in a floor, hallway, etc., an inspection case that houses an inspection board on which the monitor lamp is mounted must be placed next to the housing so that the monitor lamp can be seen, which increases the overall area of ​​the display device.

[0005] The present invention has been made in view of the above-mentioned circumstances, and has an object to provide a display device that can be made smaller while allowing light indicating the state of the device to be visible from the outside. [Means for solving the problem]

[0006] In order to achieve the above object, the display device according to the present invention comprises: a display unit having a flat shape and a display panel disposed on one surface in a thickness direction; a substrate on which are mounted electronic components constituting a power supply circuit that supplies power to the display unit and that is disposed opposite the other surface of the display unit in the thickness direction, and a light-emitting section that emits light in a manner according to the state of the device itself; The light guiding rod is long, with one end in the longitudinal direction positioned opposite the light emitting unit and the other end positioned on the outer periphery of the display unit when viewed from the thickness direction, and emits light that enters the one end from the light emitting unit and propagates to the other end from the other end in the direction facing the one side of the display unit. [Effects of the Invention]

[0007] According to the present invention, the light guiding rod is long, and one end in the longitudinal direction is arranged facing the light emitting unit, and the other end is arranged on the outer periphery of the display unit, and light that enters the one end from the light emitting unit and propagates to the other end is emitted from the other end in a direction facing one side of the display unit. As a result, while the light emitting unit is arranged on the other side of the display unit within the display device, the light emitted from the light emitting unit and indicating the state of the display device can be viewed from the one side of the display unit. Therefore, it is possible to achieve a compact display device while making the light indicating the state of the display device visible from the outside. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view of a display device according to an embodiment of the present invention; [Figure 2] FIG. 2 is a perspective view of the display device main body according to the embodiment. [Figure 3] FIG. 2 is an exploded perspective view of the display device main body according to the embodiment. [Figure 4] FIG. 2 is a cross-sectional view of a display unit according to the embodiment. [Figure 5] 4 is a cross-sectional view of the display device according to the embodiment taken along line AA in FIG. 3. [Figure 6] 1A and 1B show a light guiding rod according to an embodiment, in which FIG. 1A is a perspective view and FIG. 1B is a side view. [Figure 7]FIG. 2A is a perspective view of a light guide unit according to an embodiment, and FIG. 2B is an exploded perspective view of the light guide unit according to the embodiment. [Figure 8] FIG. 10 is a side view of a light guiding rod according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, a display device according to an embodiment of the present invention will be described with reference to the drawings. The display device according to this embodiment is used as an emergency light embedded in the floor, hallway, etc. of a building, for example. When embedded in the floor, hallway, etc., the light indicating the state of the display device can be visible, while the overall size of the display device can be reduced.

[0010] As shown in FIG. 1, the display device 100 includes a flat, box-shaped storage case 31, a rectangular plate-shaped frame 33 having a rectangular opening 33a in a plan view at its center and arranged to cover the entire inner periphery of the open portion on the +Z direction side of the storage case 31, and a protective cover 32 formed in a rectangular plate shape from a light-transmitting material and arranged to cover the +Z direction side of the device main body 1 inside the frame 33. The device main body 1 shown in FIG. 2 is stored inside the storage case 31. Also, as shown in FIG. 1, two openings 31a are formed in the peripheral wall of the storage case 31, and a wire harness (not shown) leading from the device main body 1 is inserted into bushings 35 attached to the two openings 31a, respectively. The frame 33 is made of metal, resin, or the like and is fixed to a floor, a hallway, or the like with screws 36.

[0011] 2 and 3, the device main body 1 includes a main body 10 and a flat display unit 20 disposed inside the housing. The display unit 20 includes a unit main body 21 shaped like a flat rectangular box and partially open on the +Z direction side, and a display panel 22 formed from a light-transmitting material in the shape of a rectangular plate and disposed so as to cover the open portion on the +Z direction side of the unit main body 21. As shown in FIG. 4, the display unit 20 also includes a rectangular plate-shaped first light guide plate 24 disposed in the center in the Y-axis direction inside the unit main body 21, and two elongated plate-shaped second light guide plates 25 disposed at both ends in the Y-axis direction inside the unit main body 21 with their longitudinal directions aligned with the X-axis direction, and with their end faces on the first light guide plate 24 side in the short direction facing both end faces of the first light guide plate 24 in the Y-axis direction. The display unit 20 also includes a light-emitting unit 262 arranged to face the −X-direction end face of one of the two second light guide plates 25 arranged on the +Y-direction side, and a substrate 261 on which the light-emitting unit 262 is mounted. The light-emitting unit 262 includes a light-emitting element such as an LED (Light Emitting Diode). Note that the light-emitting element may be another type of light-emitting element such as an organic EL (Electro Luminescence) element. One of the two second light guide plates 25 arranged on the +Y-direction side is curved so that a portion of its +Y-direction end face that is closer to the +X-direction end face than a substantial center in the X-axis direction approaches the −Y-direction end face as it moves toward the +X-direction side. A reflective film (not shown) is formed on the entire +Y-direction end face of the one second light guide plate 25. Light emitted from the light-emitting unit 262, incident on the −X-direction end face of the one second light guide plate 25, and propagating through the one second light guide plate 25 is reflected toward the −Y-direction side by the reflective film and emitted from the entire −Y-direction end face. Light emitted from the entire end face on the −Y direction side of one second light guide plate 25 is incident on the end face on the +Y direction side of first light guide plate 24. The other of the two second light guide plates 25 arranged on the −Y direction side is curved so that a portion of the end face on the −Y direction side that is closer to the −X direction side than the approximate center in the X-axis direction approaches the end face on the +Y direction side as it moves toward the −X direction side.A reflective film (not shown) is formed on the entire end face on the -Y direction side of the other second light guide plate 25, and light emitted from the light-emitting portions 262, incident on the end face on the +X direction side of the other second light guide plate 25, and propagating within the other second light guide plate 25 is reflected by the reflective film toward the +Y direction side and emitted from the entire end face on the +Y direction side. The light emitted from the entire end face on the +Y direction side of the other second light guide plate 25 is incident on the end face on the -Y direction side of the first light guide plate 24. Returning to FIGS. 2 and 3, the display unit 20 also has power supply terminals 23 for supplying power to each of the light-emitting portions 262 via the aforementioned substrate 261.

[0012] The main body 10 includes a housing 11, a power supply unit 12 disposed inside the housing 11, and a light guide unit 14 that guides light emitted from a light-emitting unit 124 that emits light in a manner that indicates the state of the display device 100. The housing 11 is formed, for example, by bending a metal plate. The housing 11 includes a rectangular bottom wall 111 having a notch 111a formed in the center of the +Y-direction end in the X-axis direction, side walls 112 extending in the +Z direction from both ends of the bottom wall 111 in the X-axis direction, a side piece 113 extending in the +Z direction from a portion of the -Y-direction end of the bottom wall 111, and two side pieces 114 extending in the +Y direction from both ends of the notch 111a at the +Y-direction end of the bottom wall 111 in the X-axis direction. A binding member 13 is fixed to the bottom wall 111 to hold a wire harness extending from the power supply unit 12. The side wall 112 is provided with a protruding piece 1121 that protrudes inward and supports the display unit 20 with its +Z direction side in contact with a part of the display unit 20. In addition, a recess 112a is formed in a portion of the side wall 112 that faces the light guide unit 14.

[0013] 5, the power supply unit 12 has a board case 121, a board 122 housed inside the board case 121, electronic components 123 mounted on the board 122, and a light-emitting unit 124. A seal member 34 is interposed between the +Z direction end of the storage case 31 in which the power supply unit 12 is housed and the frame body 33 to prevent foreign matter from entering the storage case 31. The power supply unit 12 including the board 122 is disposed opposite the -Z direction side of the display unit 20. The board case 121 has a lower case 1211 fixed to the bottom wall 111 of the housing 11 via a metal plate 15 and having the board 122 disposed inside, and an upper case 1212 disposed so as to cover the board 122, electronic components 123, and light-emitting unit 124 from the +Z direction side of the lower case 1211. The electronic components 123, together with a conductor pattern (not shown) provided on the substrate 122, constitute a power supply circuit that supplies power to the display unit 20. The light-emitting unit 124 has a light-emitting element such as an LED, and emits light in a manner that corresponds to the state of the display device 100. Note that the light-emitting element may be another type of light-emitting element, such as an organic EL element. The light-emitting unit 124 emits light in a manner that corresponds to, for example, the charging state of a battery (not shown) in the power supply unit 12 or the presence or absence of an abnormality in the linear light source of the display unit 20. For example, the light-emitting unit 124 blinks at long intervals as the remaining battery charge decreases.

[0014] Light guiding unit 14 includes two light guiding rods 141 and rod support unit 142 that supports two light guiding rods 141. As shown in FIGS. 6A and 6B, light guiding rod 141 has a long cylindrical shape and is curved in an arc shape as a whole. One longitudinal end 1412 of light guiding rod 141 is disposed opposite light emitting unit 124 mounted on substrate 122. The other end 1413 of light guiding rod 141 has a shape in which the area of ​​a cross section perpendicular to the extending direction of light guiding rod 141 increases toward the other end of light guiding rod 141. That is, the other end 1413 of light guiding rod 141 has a cone-like shape whose diameter increases toward the end of light guiding rod 141. For example, the diameter of the incident surface of end 1412 of light guiding rod 141 is set to approximately 3.5 mm, and the diameter of the exit surface of end 1413 is set to approximately 6.0 mm. Light emitting surface 1413a of end 1413 of light guiding rod 141 is flat. Furthermore, two protrusions 1414 are provided at a location closer to the center than end 1412 of light guiding rod 141. The protrusions 1414 protrude away from each other in a direction perpendicular to the extension direction of light guiding rod 141.

[0015] As shown in Figure 7(A), the rod support unit 142 has a rod case 1421 inside which the light guide rod 141 is stored, and a case cover 1422 attached to the rod case 1421, and supports the light guide rod 141 in an arc-shaped curved state from one end 1412 to the other end 1413. 7(B), the rod case 1421 has a rectangular plate-shaped first bottom wall 14213, a second bottom wall 14211 that is continuous with the end of the first bottom wall 14213 on the +Z direction side and curves in an arc so as to convex toward the -X direction side, a pair of side walls 14212 that stand toward the -X direction side from both end portions in the Y axis direction of the first bottom wall 14213 and the second bottom wall 14211, a side wall 14214 that stands toward the -X direction side from the end of the -Z direction side of the first bottom wall 14213, and a side wall 14215 that stands toward the -X direction side from the end of the +Z direction side of the second bottom wall 14211. That is, the rod case 1421 has a box-like shape that is open on the -X direction side as a whole. First bottom wall 14213 is provided with through-holes 14213a through which two light guide rods 141 are inserted, respectively, penetrating first bottom wall 14213. Second bottom wall 14211 has, on its -X direction side, guide groove 14211a into which a portion of light guide rod 141 is fitted to guide light guide rod 141, and a rib 14211b on its +Z direction side that supports protrusion 1414 of light guide rod 141. Side wall 14215 is formed with two notches 14215a into which portions of two light guide rods 141 closer to end 1413 than protrusion 1414 are fitted. Two side pieces 14222 are provided with locking claws 14212a for locking case cover 1422. A pair of hooks 14214a, inside which a part of the metal plate 15 is disposed, is disposed at both ends in the Y-axis direction of the side wall 14214. In addition, the side wall 14214 is formed with flexible locking pieces 14214b for locking the rod case 1421 to a part of the metal plate 15 by pressing the metal plate 15 from the +Z direction side with a part of the metal plate 15 disposed inside the pair of hooks 14214a.

[0016] The case cover 1422 has a rectangular plate-shaped main piece 14221 and a pair of side pieces 14222 standing upright in the +X direction from both ends of the main piece 14221 in the Y axis direction. A U-shaped rib 1422b protrudes from the -Z direction side of the main piece 14221 near the end in the +Z direction, and its tip abuts against a part of the housing 11 when the rod support unit 142 is housed in the housing 11, thereby restricting movement of the rod support unit 142 relative to the housing 11. In addition, slits 1422c are formed near the centers in the Z axis direction of the main piece 14221 and the pair of side pieces 14222, and lock the case cover 1422 to the rod case 1421 by locking the locking claws 14212a of the rod case 1421 inside the slits 1422c. Furthermore, rib 1422a is provided on the +X direction side of main piece 14221 to protrude therefrom, for maintaining the position of light guiding rod 141 with the tip end thereof in contact with light guiding rod 141.

[0017] As described above, in display device 100 according to the present embodiment, light guiding rod 141 is long, and one end 1412 in the longitudinal direction is arranged facing light-emitting unit 124, while the other end 1413 is arranged on the outer periphery of display unit 20. Light that enters one end 1412 from light-emitting unit 124 and propagates to the other end 1413 is emitted from the other end 1413 in a direction facing the +Z direction side of display unit 20. As a result, while light-emitting unit 124 is arranged on the −Z direction side of display unit 20 within display device 100, light emitted from light-emitting unit 124 and indicating the state of display device 100 can be viewed from the +Z direction side of display unit 20. Therefore, it is possible to miniaturize display device 100 while making it possible to view the light indicating the state of display device 100 from outside display device 100.

[0018] Furthermore, in display device 100 according to the present embodiment, end 1413 of light guiding rod 141 is disposed on the outer periphery of display unit 20, and therefore the state of display device 100 can be displayed without impairing the display function of display unit 20. Furthermore, in display device 100 according to the present embodiment, when inspecting display device 100, the light-emitting state of light-emitting unit 124 that emits light that indicates the state of display device 100 can be confirmed without removing frame body 33 and protective cover 32 of display device 100 from storage case 31, which has the advantage of improving work efficiency when inspecting display device 100 and making it easier to find abnormalities in display device 100.

[0019] Furthermore, end 1413 of light guiding rod 141 according to the present embodiment has a shape in which the area of ​​a cross section perpendicular to the extension direction of light guiding rod 141 increases toward the end of light guiding rod 141. This increases the area of ​​end 1413 of light guiding rod 141 when viewed from the +Z direction side of display device 100, thereby improving the visibility of light emitted from end 1413 of light guiding rod 141.

[0020] Furthermore, rod support unit 142 according to the present embodiment supports two light guiding rods 141 in an arc-shaped curved state from one end 1412 to the other end 1413. This can reduce the loss of light propagating through light guiding rod 141.

[0021] Although the embodiments of the present invention have been described above, the present invention is not limited to the configurations of the above-described embodiments. For example, as shown in Fig. 8, light emitting surface 21413a of end 21413 opposite one end 1412 in the longitudinal direction of light guiding rod 2141 may be curved in a dome shape that is convex outward. Note that in Fig. 8, the same components as those in the embodiments are denoted by the same reference numerals as in Fig. 6(B).

[0022] According to this configuration, the orientation angle of light emitted from end 21413 of light guiding rod 2141 is widened by the lens effect, thereby improving visibility accordingly.

[0023] Furthermore, the display device 100 according to the present embodiment is not limited to an emergency light embedded in a floor, a corridor, etc., but may be, for example, an emergency light suspended from a ceiling, a wall, etc. Alternatively, the display device 100 may be a display device used for purposes other than an emergency light.

[0024] Although the embodiments and modifications of the present invention have been described above, the present invention is not limited to these. The present invention includes any combination of the embodiments and modifications, and any combination to which appropriate modifications have been made. [Industrial Applicability]

[0025] The present invention is suitable as a display device having a function of displaying the status of its own device. [Explanation of symbols]

[0026] 1: device body, 10: body part, 11: housing, 12: power supply unit, 13: binding member, 14: light guide unit, 15: metal plate, 20: display unit, 21: unit body, 22: display panel, 23: power supply terminal, 24: first light guide plate, 25: second light guide plate, 31: storage case, 31a, 33a: opening, 32: protective cover, 33: frame body, 34: sealing member, 35: bushing, 36: screw, 100: display device, 111: bottom wall, 111a, 1415a: notch, 112: side wall, 113, 114, 14222: side piece, 121: board case, 122, 261: board, 123: electronic part product, 124, 262: light emitting part, 141: light guiding rod, 142: rod support unit, 1121: protruding piece, 1211: lower case, 1212: upper case, 1412, 1413: end, 1414: protrusion, 1421: rod case, 1422: case cover, 14211: second bottom wall, 14211a: guide groove, 14212, 14214, 14215: side wall, 14212a: locking claw, 14213: first bottom wall, 14213a: through hole, 14211b, 1422a, 1422b: rib, 14214a: hook, 14214b: locking piece, 14221: main piece, 1422c: slit

Claims

1. a display unit having a flat shape and a display panel disposed on one surface in a thickness direction; a substrate on which are mounted electronic components constituting a power supply circuit that supplies power to the display unit and that is disposed opposite the other surface of the display unit in the thickness direction, and a light-emitting section that emits light in a manner according to the state of the device itself; a light guiding rod that is long and has one end in a longitudinal direction that is arranged opposite to the light emitting unit and the other end that is arranged on the outer periphery of the display unit when the display unit is viewed in a thickness direction, and that emits light that is incident on the one end from the light emitting unit and propagates to the other end from the other end in a direction facing the one surface side of the display unit; Display device.

2. the other end of the light guiding rod has a shape in which the area of ​​a cross section perpendicular to the extending direction of the light guiding rod increases toward the other end of the light guiding rod; The display device according to claim 1 .

3. the light emitting surface at the other end of the light guiding rod has a dome-shaped curved shape that is convex outward; 3. The display device according to claim 1 or 2.

4. a rod support unit that supports the light guide rod in an arc-shaped curved state from the one end to the other end, 3. The display device according to claim 1 or 2.

Images