JP2013235235A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact and light-weight display device that has high visibility when visually recognized from a distant place, and can display the same display information on both sides.SOLUTION: Display units 50 including a first light guide plate and a second light guide plate are provided respectively on both sides of a main body 30; and any one of a first LED provided on a side face of the first light guide plate and a second LED provided on a side face of the second light guide plate is lit up by power supplied from a control unit 70. Accordingly, two of the first light guide plate and the second light guide plate provided on both sides of the main body 30 are lit up or lit off respectively at the same time, and thereby the same display can be performed on both sides of the main body 30.

Description

  The present invention relates to a display device.

  Conventionally, a display device that distinguishes and displays two types of states (for example, “OFF” and “ON”) is known. As such a display device, for example, there are two types depending on the color of the irradiated lamp by irradiating a light guide plate provided on one side of the display device with light from a red lamp or green lamp from the back side. There is known a display device that displays the state of the above. In this display device, by associating a color to be lit in advance with a state, for example, a red lamp is lit in the “on” state, and a green lamp is lit in the “off” state. A state can be distinguished and displayed.

  However, when such a display device is used, it is necessary to provide two types of lamps of different colors on the back side of the light guide plate, so that a depth sufficient to arrange the light guide plate and the two types of lamps is required. There is a problem that the apparatus becomes a large scale. In particular, when displaying on both sides of the display device, it is necessary to provide two sets of two types of lamps and irradiate each of them, so that there is a problem that the device becomes large and the weight is large. In addition, in order to increase the visibility from a distance, it is necessary to use a bright lamp, so there is a problem that the cost is high.

  The present invention has been made in view of such problems, and a main object of the present invention is to provide a small and lightweight display device having high visibility when viewed from a distance.

  The present invention adopts the following means in order to achieve the main object described above.

The display device of the present invention includes:
In a display device that emits light from both ends of the main body,
Two display units that are provided on one end side and the other end side of the main body, respectively, and display at least one of the first display information and the second display information;
A shielding plate that prevents the first display information or the second display information displayed on the display unit provided on the one end side from being visually recognized from the other end side;
With
The display unit is capable of displaying the first light guide plate capable of displaying the first display information, a plurality of first light sources arranged on the side of the first light guide plate, and the second display information. A second light guide plate disposed on the inner side of the main body than the first light guide plate, and a plurality of second light sources disposed on a side surface side of the second light guide plate.
Is.

  In this display device, a display unit having a first light guide plate capable of displaying first display information and a second light guide plate capable of displaying second display information on one end side and the other end side of the main body. Are provided. A plurality of first light sources are arranged on the side surface side of the first light guide plate. When power is supplied to the first light source, light is irradiated from the first light source to the first light guide plate, and the first display Information is displayed. A plurality of second light sources are disposed on the side surface of the second light guide plate. When power is supplied to the second light source, light is emitted from the second light source to the second light guide plate, Two display information is displayed. Thus, by arranging the first light source on the side surface side of the first light guide plate and the second light source on the side surface side of the second light guide plate, the first light source is arranged on the back surface side of the first light guide plate, Compared with the case where a light source is each arrange | positioned at the back surface side of a 2nd light-guide plate, it can reduce in size. Moreover, since the shielding board is provided, it is prevented that the 1st display information or the 2nd display information displayed with the display unit provided in the one end side is visually recognized from the other side. By doing so, the first display information or the second display information from the other end side to the one end side is prevented from being visually recognized, and an excellent aesthetic appearance is obtained.

The display device of the present invention includes:
In a display device that emits light from both ends of the main body,
Two display units provided on one end side and the other end side of the main body,
A power supply unit that supplies power to the two display units and starts or stops supplying power to the display units;
With
The display unit is capable of displaying a first light guide plate capable of displaying first display information, a plurality of first light sources arranged on a side surface of the first light guide plate, and second display information, A second light guide plate disposed on the inner side of the main body than the first light guide plate, and a plurality of second light sources disposed on a side surface side of the second light guide plate,
The power supply unit does not light the other when turning on either the first light source or the second light source,
Is.

  In this display device, display units are respectively provided on one end side and the other end side of the main body, and when power is supplied to the display unit from the power supply unit, the side surfaces of the first light guide plate or the second light guide plate are provided. The first light source or the second light source disposed on the side emits light, and the first light guide plate or the second light guide plate is irradiated with light. At this time, when the power supply unit turns on one of the first light source and the second light source, the other is not turned on, so that only one of the first light guide plate and the second light guide plate is irradiated with light. Thus, only one of the first display information and the second display information is displayed. Thus, by arranging the first light source on the side surface side of the first light guide plate and the second light source on the side surface side of the second light guide plate, the first light source is arranged on the back surface side of the first light guide plate, Compared with the case where a light source is each arrange | positioned at the back surface side of a 2nd light-guide plate, it can reduce in size. In addition, since a darker shielding plate is provided in the inner direction of the main body than the second light guide plate, the inside of the main body can be visually recognized from the outside via the first light guide plate or the second light guide plate. Can prevent and give an excellent aesthetic. Here, the dark color means a color with low lightness, for example, a color such as black, gray, dark green, or dark blue.

  In the display device of the present invention, when the first light source of the display unit provided on one end side of the main body is turned on, the display unit of the display unit provided on the other end side of the main body is provided. The second light source of the display unit provided on one end side of the main body without turning on the second light sources of both display units provided on both ends of the main body while turning on one light source Is turned on, the second light source of the display unit provided on the other end of the main body is turned on, and the first of both display units provided on both ends of the main body is provided. A control unit that controls turning on and off of the first light source and the second light source so as not to turn on the light source. If it carries out like this, the same information can be simultaneously displayed on the both ends of the one end side and the other end side of a main-body part.

  In the display device of the present invention, the second light source may be a light source that emits light with a color different from that of the first light source. In this way, even if the first light guide plate and the second light guide plate are the same, different states are displayed depending on the color of the light emitted from the first light source and the light emitted from the second light source. Can do.

  In the display device of the present invention, the first display information is composed of characters, symbols, figures, or combinations thereof provided on the main surface of the first light guide plate, and the second display information is the second light guide plate. It may be composed of characters, symbols, figures, or a combination thereof different from the first display information provided on the main surface. In this way, different information can be displayed depending on the first display information and the second display information.

  In the display device of the present invention, the first display information and the second display information are represented by a plurality of diffusion dots, and the diffusion dots are a main surface of the first light guide plate and a main surface of the second light guide plate. May be arranged. In this way, the first display information and the second display information can be displayed by a simple process of providing a plurality of diffusion dots. At this time, since the shielding plate is provided on the inner side of the main body than the second light guide plate, the boundary portion of the second display information represented by a plurality of diffusion dots does not have the shielding plate. It can be made clearer by comparison. In other words, the visibility of the second display information can be improved. Note that when the first light source is turned on and the first display information is displayed, the second light source is turned off and the second display information is not displayed. Regarding the display information, the visibility of the first display information can be enhanced by the shielding plate.

  The display device of the present invention includes a first light source fixing member to which a plurality of the first light sources are attached, a second light source fixing member to which the plurality of second light sources are attached, and the first light source fixing member or A metal fixing member that fixes the second light source fixing member to the display unit. In this way, the heat generated when the first light source or the second light source emits light can be radiated not only from the first light source fixing member and the second light source fixing member but also from the fixing member. In addition, when heat is transmitted to other members of the display unit through the fixing member, heat can be radiated from a wider range. For this reason, compared with the case where the first light source fixing member or the second light source fixing member is not fixed to the display unit by the fixing member, the heat generated by the first light source or the second light source can be radiated more efficiently. This can reduce the possibility of malfunction or damage of the first light source or the second light source due to heat.

  In the display device of the present invention adopting this aspect, the first light source fixing member and the second light source fixing member may be in close contact with the fixing member via a heat medium. In this way, heat can be more easily transferred from the first light source fixing member and the second light source fixing member to the fixing member than in the case where the heat medium is not included. The possibility of malfunction or damage of the first light source or the second light source can be reduced. Here, the heat mediating substance means TIM (Thermal Interface Material), and includes, for example, silicone rubber and various resins obtained by adding a heat conductive filler such as alumina.

  In the display device of the present invention, the display unit may be attached such that the orientations of the main surfaces of the first light guide plate and the second light guide plate can be changed. If it carries out like this, the visibility from the up-and-down left-right direction can be improved by making it point in the direction of the main surface of a 1st light-guide plate or a 2nd light-guide plate in any one of up-down, left-right. In addition, as a method for attaching the orientation of the main surface in a changeable manner, for example, the upper side of the display device may be attached to the main body so as to be rotatable, and the lower side of the main surface may be attached to be pressed in a predetermined direction.

  In the display device of the present invention, the main body portion is provided with lid portions that open and close both end surfaces on both end sides, and the lid portion is a window through which the first light guide plate and the second light guide plate can be seen. You may have. In this way, the lid part distinguishes the inside and outside of the main body, so even if it is placed outdoors, the possibility of contamination of the inside of the main body due to rain or dust is reduced. The possibility of failure or malfunction can be reduced in advance. In addition, since the light from the outside is blocked by the lid, and the surroundings of the first light guide plate and the second light guide plate are dark, the contrast with the surroundings when the first light source or the second light source is turned on becomes clear, Visibility can be improved.

  In the display device of the present invention adopting this aspect, the lid portion may further have protrusions protruding outward in the upper surfaces of both ends. In this way, for example, even when it is placed outdoors during the daytime, the sunlight is blocked by the protruding portion protruding outward, and the sunlight hits and reflects on the light guide plate. It can be reduced in advance.

  In the display device of the present invention, the window may be made of one or a combination of two or more selected from the group consisting of antireflection glass, low reflection glass, and non-reflection glass. By so doing, the reflection on the window surface can be reduced and the visibility of the first light guide plate and the second light guide plate can be improved as compared with the case where the window is made of ordinary glass.

  In the display device of the present invention, the two display units may be provided in the lid portion instead of the main body portion. In this case, the distance between the window and the first light guide plate and the second light guide plate provided in the display unit can be shortened as compared with the case where the display unit is provided inside the main body.

  In the display device of the present invention, the shielding plate may be larger than either the first light guide plate or the second light guide plate. In this way, when viewed from the outside, the back surfaces of the first light guide plate and the second light guide plate are hidden by the shielding plate, so that the display device is provided via the first light guide plate or the second light guide plate. This prevents the inside of the machine from being visually recognized and is more beautiful. Further, since the shielding plate is provided on the back side of the first light guide plate and the second light guide plate, the first display information and the second information provided on the first light guide plate can be further compared with the case where the shielding plate is not provided. It is easy to visually recognize the second display information provided on the light guide plate.

  In the display device of the present invention, the main body may further include a through hole on the bottom surface or the side surface. In this way, the temperature can be adjusted via this through-hole even when the inside becomes hot due to heat generated from the light source or when the outside air becomes cold by placing it outdoors in winter. The possibility of condensation inside the main body can be reduced in advance. Further, even when water enters the inside due to rain or the like, it can be discharged to the outside through this through hole, so that the possibility of water collecting inside can be reduced in advance. In other words, it is possible to reduce the possibility that water droplets or the like due to condensation will adversely affect or malfunction the electronic equipment inside the main body.

  In the display device of the present invention, the first light source may be a light source that emits red light, and the second light source may be a light source that emits green light. In this way, it is socially recognized that red indicates high risk and green indicates high safety, so the display contents displayed by the display device due to color change It can be judged intuitively. For this reason, when arrange | positioning a display apparatus in the place where safety confirmation is important, the possibility of the accident by a viewer's misjudgment can be reduced beforehand.

3 is a perspective view illustrating an outline of an appearance of a display device 20. FIG. 4 is a perspective view illustrating an outline of a configuration of a display unit 50. FIG. 4 is an exploded perspective view showing a part of the configuration of the display unit 50. FIG. It is a perspective view which shows the outline of the external appearance of the display apparatus 20 which removed the cover part 40 of the one surface side. 4 is a cross-sectional view illustrating an outline of a configuration of a display device 20. FIG. It is a perspective view which shows the outline of a structure of the display apparatus 120 of other embodiment. It is sectional drawing which shows the outline of a structure of the display apparatus 120 of other embodiment. FIG. 10 is a perspective view showing an outline of another configuration of the display device 20 with a part of the lid 40 cut away. FIG. 12 is a cross-sectional view schematically illustrating another configuration of the display device 120. It is a disassembled perspective view which shows the outline of a structure of the display unit 250 of other embodiment.

  Here, based on the above-described drawings, the correspondence between the constituent elements of the present embodiment and the constituent elements of the present invention will be clarified in describing the first embodiment for carrying out the present invention. . The display device 20 and the display device 120 of the present embodiment correspond to the display device of the present invention, the main body 30 and the main body 130 correspond to the main body, the display unit 50 and the display unit 150 correspond to the display unit, The first LED 51a corresponds to the first light source, the first light guide plate 54 corresponds to the first light guide plate, the second LED 55a corresponds to the second light source, the second light guide plate 58 corresponds to the second light guide plate, The LED fixing member 52 corresponds to the first light source fixing member and the second light source fixing member, the shielding plate 59 corresponds to the shielding plate, the first fixing member 62 and the second fixing member 64 correspond to the fixing member, "Corresponds to the first display information," OFF "corresponds to the second display information, the first diffusion dots 53 and the second diffusion dots 57 correspond to the diffusion dots, and the lid portion 40 and the lid portion 140 are the lid portions. The air hole 34 corresponds to the through hole, and the flange 46 Corresponds to the protrusion, the control unit 70 corresponds to the control unit and power supply unit.

  Next, the configuration of the display device 20 will be described in detail as a first embodiment of the present invention with reference to FIGS. Here, FIG. 1 is a perspective view showing an outline of a configuration of a display device 20 which is an example of an embodiment of the present invention. The display device 20 according to the embodiment of the present invention includes a main body 30, lids 40 provided at both ends of the main body 30, a display unit 50 attached to the inside of the main body 30 (see FIG. 2), And a control unit 70 for supplying power to the display unit 50 (see FIGS. 4 and 5).

  As shown in FIG. 1, the main body 30 is a metal frame having a substantially rectangular parallelepiped shape, and the front-side lid portion 40 includes two pieces provided on one side (on the left side in FIG. 1). The stopper member 36 is attached so as to be openable and closable. Further, the lid portion 40 on the back surface side is attached so as to be openable and closable similarly to the lid portion 40 on the front side by two unillustrated stopper members provided on the other side surface side (right side surface in FIG. 1). . By doing so, the lid portion 40 can always be opened to the right side, and therefore, when the lid portion 40 on either the front side or the back side is opened or closed, it can be opened and closed by the same operation. Further, on the bottom surface side of the main body 30, through holes that penetrate the bottom surface are provided as air holes 34 and power supply through holes 38 (see FIG. 5). Thus, by providing the air hole 34 on the lower surface side, even when the main body 30 is disposed outdoors, the main body 30 can be reduced while reducing the possibility of rain or the like entering the main body 30. Moisture due to water vapor or the like can be discharged from the inside of the unit 30 to the outside. Further, even if rain or the like enters the inside of the main body 30, water can be accumulated inside because it is discharged from the air hole 34 or the power supply through hole 38 provided on the bottom surface side. Can be reduced in advance. In addition, by providing the power supply through hole 38 on the lower surface side, even when the main body 30 is disposed outdoors, the possibility of rain or the like entering the main body 30 is reduced. A power cable (not shown) that connects the control unit 70 and an external power supply (not shown) can be introduced into the main body 30. The air hole 34 and the power supply through hole 38 may be covered with a cover or the like. In this way, even when the main body 30 is placed outdoors, dust or the like enters the main body 30 while reducing the possibility of rain or the like entering the main body 30 in advance. The possibility of doing so can also be reduced.

  As shown in FIG. 1, the lid portion 40 is a metal substantially rectangular parallelepiped member, and has a substantially rectangular glass window 44 at the center of the front surface 42. A protruding collar 46 is provided. When the lid portion 40 is fixed to the main body portion 30 in a closed state, the front surface 42 of the lid portion 40 is fixed to the main body portion 30 while being inclined downward. When setting, sunlight is irradiated onto the window 44 and reflected by the window 44, thereby reducing the possibility that the first light guide plate 54 or the second light guide plate 58, which will be described later, becomes difficult to visually recognize. . At this time, since the collar portion 46 is provided not only on the upper surface side but also on the side surface side, when the sunlight hits the window 44 from a low angle, such as in the morning or evening, the first light guide plate 54 or the second light guide plate 54 is similarly provided. The possibility that the light guide plate 58 becomes difficult to visually recognize can be reduced in advance.

  As shown in FIG. 2, the display unit 50 is a member in which the first light guide plate 54 and the like are fixed to the heat radiating plate 60 from four sides by a first fixing member 62 and a second fixing member 64, as shown in FIG. In addition, a first light guide plate 54 having a plurality of first LED 51a disposed around it, a second light guide plate 53 having a second LED substrate 55 having a plurality of second LEDs 55a disposed around it, The shield plate 59 whose surface is painted black is fixed in a state of being arranged substantially in parallel.

  The first LED 51a is a front-emitting red light emitting diode. As shown in FIG. 3, the first LED 51 a is linearly arranged on the surface of the first LED substrate 51, and the LED fixing member 52 having a substantially U-shaped cross section through the first LED substrate 51. It is attached to the bottom with double-sided tape (not shown). The LED fixing member 52 is fitted into the upper side surface, the lower side surface, the right side surface, and the left side surface of the first light guide plate 54, and fixes the first LED 51 a at a position facing the side surface of the first light guide plate 54. By doing so, it is possible to irradiate the side surface of the first light guide plate 54 with light. In addition, since the first LED substrate 51 is attached to the LED fixing member 52, the heat generated when the first LED 51 a emits light is transmitted to the metal LED fixing member 52 via the first LED substrate 51. Compared with the case where it is not attached to the LED fixing member 52, the heat generated in the first LED 51a can be released more, and the possibility that the first LED 51a breaks down due to heat generation can be reduced. At this time, epoxy resin or the like may be potted on the surfaces of the first LED 51a and the first LED substrate 51, the entire substrate may be completely hermetically coated, or sealed in a silicon tube or the like. By doing so, even if condensation occurs inside the display device 20 or raindrops or the like enter the display device 20, there is a possibility that the first LED 51a may break down or malfunction. Can be reduced.

  The first light guide plate 54 is a plate member made of methacrylic resin having a thickness of about 4 mm to about 8 mm and has a plurality of first diffusion dots 53 that diffuse light incident from the side surface. It is provided on the surface. As shown in FIG. 3, the plurality of first diffusion dots 53 are provided at positions where characters “ON” are formed. For this reason, the red light irradiated from the first LED 51a to the first light guide plate 54 is diffused by the plurality of first diffusion dots 53, so that the letters “ON” are displayed in red. By doing so, it is possible to convey that the character is “entered” (connected) while intuitively reminding the user of the danger by the red image.

  Here, the first diffusion dot 53 will be described in more detail. The first diffusing dots 53 are concave portions recessed in a substantially quadrangular pyramid shape, and the first diffusion dots 53 are first positioned so that the surface corresponding to the bottom surface of the quadrangular pyramids is located on the inner side (the inner side of the main body 30 and closer to the control unit 70). A plurality of light guide plates 54 are provided on one main surface. By doing so, light incident from the side surface of the first diffusion plate 54 is diffused mainly in the outer direction of the main surface (the direction of the window 44), and therefore, the outer side of the main surface (the direction of the window 44). It is brighter than the case provided in The length of each side of this quadrangular pyramid is 1.8 mm to 2.0 mm, the depth is 0.4 mm to 0.8 mm, and they are all the same size. It has been. Further, the pitch between the adjacent first diffusion dots 53 is 1.0 mm to 3.0 mm, and all are provided at the same pitch. By forming the first diffusing dots 53 in such a shape, when the light emitted from the first LED 51a is emitted from the first light guide plate 54, the light is sufficiently bright and arranged outdoors in the daytime. Even if it is a case, it can be visually recognized from a distance. Here, the distant is a position at least 50 meters away, and is preferably a position away from 100 meters or more.

  The second LED 55a is a front-emitting green light-emitting diode. As shown in FIG. 3, the second LED 55 a is linearly arranged on the surface of the second LED substrate 55, and the LED fixing member 52 having a substantially U-shaped cross section through the second LED substrate 55. It is attached to the bottom with double-sided tape (not shown). The LED fixing member 52 is fitted into the upper side surface, the right side surface, and the left side surface of the second light guide plate 58, and fixes the second LED 55 a at a position facing the side surface of the second light guide plate 58. By doing so, it is possible to irradiate the side surface of the second light guide plate 58 with light. Further, since the second LED board 55 is adhered to the LED fixing member 52, the heat generated when the second LED 55a emits light is transmitted to the metal LED fixing member 52 via the second LED board 55. Compared with the case where it is not attached to the LED fixing member 52, the heat generated in the second LED 55a can be released more, and the possibility that the second LED 55a breaks down due to heat generation can be reduced. Note that the second LED board 55 and the second LED 55a may be subjected to waterproofing or drip-proofing treatment, similarly to the first LED 51a and the first LED board 51. By doing so, the possibility that the second LED 55a breaks down or malfunctions can be reduced in advance.

  The second light guide plate 58 is the same as the first light guide plate 54 except that the second diffusing dots 57 are formed at positions where the characters “cut” are formed on the main surface. To do. When the second light guide plate 58 is irradiated with light from the second LED 55a, the green light is diffused by the plurality of second diffusion dots 57, so that the word “cut” is displayed in green. . By doing this, it is possible to inform the user of the fact that it is safe by the green image and to inform that it is disconnected (not connected) by the characters “OFF”. The shape of the second diffusing dot 57 is the same as that of the first diffusing dot 53, and therefore the description thereof is omitted here.

  The shielding plate 59 is a plate-like member having a black surface, and is attached to the rear surface side (the inner side of the main body 30 and closer to the control unit 70) than the second light guide plate 58, as shown in FIG. ing. The shielding plate 59 is slightly larger than the first light guide plate 54 and the second light guide plate 58. For this reason, when the first light guide plate 54 or the second light guide plate 58 is viewed from the outside, the line of sight is blocked by the shielding plate 59 and the inside of the main body 30 (for example, the control unit 70 or the like) can be seen. No. For this reason, it is excellent in aesthetics. In addition, since the surface of the shielding plate 59 is dark, when the first light guide plate 54 or the second light guide plate 58 is illuminated, the outline of the characters “ON” or “OFF” is white. In comparison, it looks more clearly. For this reason, even when viewed from a distance, the visibility is high. Note that the color of the surface of the shielding plate 59 is not limited to black, and may be a dark color such as gray, dark green, or dark blue, or the shielding plate 59 may be omitted.

  As shown in FIG. 2, the display unit 50 is configured by fixing these members to the heat radiating plate 60. Specifically, the LED fixing member 52 and the shielding plate 59 arranged above and below the first light guide plate 54 and the second light guide plate 58 are made by the first fixing member 62 which is an L-shaped metal member. Fix from above and below. At the same time, the second fixing member 64 having the same cross-sectional shape as that of the Z-shaped steel allows the LED fixing member 52 and the shielding plate 59 disposed on the right and left sides of the first light guide plate 54 and the second light guide plate 58 to be shifted left and right. While fixing from the direction, the surface side of the first light guide plate 54 is pressed. By doing so, the first fixing member 62 and the second fixing member 64 can be firmly fixed to the heat radiating plate 60, and the display unit 50 can be used even when external shock or vibration is applied. The possibility of failure or damage can be reduced in advance. At this time, the first fixing member 62 or the second fixing member 64 and the LED fixing member 52 are TIM (Thermal Interface Material, for example, Coolprovide CPVS-F ("CoolProvide" manufactured by Kitagawa Industries Co., Ltd.) Company registered trademark)). By doing so, the heat generated by the first LED 51a or the second LED 55a is more easily transferred from the LED fixing member 52 to the first fixing member 62 as compared with the case where the TIM is not passed. In other words, the heat dissipation effect of the first LED 51a or the second LED 55a can be further improved.

  Here, a fixing method for fixing the display unit 50 to the main body 30 will be described in detail with reference to FIG. Here, FIG. 4 is a perspective view showing a state where the cover 40 on the one surface side is removed from the display device 20. As shown in FIG. 4, the display unit 50 is attached to the main body 30 so as to be opened and closed via a hinge 65 provided on one end side. Specifically, the heat radiating plate 60 of the display unit 50 is fixed between the hinge 65 and the third fixing member 68 by screws (not shown). Since the heat radiating plate 60 is fixed to the third fixing member 68 with screws 67, it can be opened and closed by removing the screws 67 and rotating. By doing so, even if the control unit 70 is arranged on the back side of the display unit 50 (the center side of the main body 30 and the position between the display units 50), it is easy. The control unit 70 can be operated. At this time, the hinge 65 is welded to a C-shaped steel (not shown) welded to the inner side surface of the main body 30, and the third fixing member 68 having the same cross-sectional shape as the Z-shaped steel is also welded to the inner side surface of the main body 30. Therefore, the display unit 50 is firmly fixed to the inner side surface of the main body 30. By doing so, it is possible to prevent the possibility that the display unit 50 vibrates or resonates when vibration is applied from the outside.

  As shown in FIG. 5, the control unit 70 is attached at a position between the display units 50 provided on both ends of the main body 30 and between the display units 50, and supplies electric power supplied from outside to both ends of the main body 30. To the display unit 50 provided on the side. At this time, the circuit of the control unit 70 is provided with a plurality of relays (relays). By switching this relay by a switch (not shown) provided in the main body 30 or an external switch electrically connected to the main body 30 or an external electric signal or the like, the two first LEDs 51a or Electric power can be supplied to one of the two second LEDs 55a. For this reason, when power is supplied to both the first LEDs 51a provided in the main body 30, power is not supplied to any of the second LEDs 55a. On the other hand, when power is supplied to both the second LEDs 55a, power is not supplied to any of the first LEDs 51a. By doing so, power is supplied to either the first LED 51 a or the second LED 55 a provided on both sides of the main body 30, and light is applied to either the first light guide plate 54 or the second light guide plate 58. Is irradiated. For this reason, either “off” or “on” information can be displayed on both sides of the main body 30. In addition, the control unit 70 may be subjected to waterproofing or drip-proofing treatment similarly to the first LED 51a and the first LED substrate 51. By doing so, there is a possibility that the control unit 70 may break down or malfunction even if condensation occurs inside the display device 20 or raindrops or the like enter the display device 20. Can be reduced.

  According to the display device 20 of the first embodiment described in detail above, the display units 50 each including the first light guide plate 54 and the second light guide plate 58 are provided on both ends of the main body 30, and the control unit 70. The first LED 51a provided on the side surface side of the first light guide plate 54 or the second LED 55a provided on the side surface side of the second light guide plate 58 is lit by the power supplied from. At this time, since the first LED 51a is disposed on the side surface of the first light guide plate 54 and the second LED 55a is disposed on the side surface of the second light guide plate 58, the back surface side of the first light guide plate 54 or the second light guide plate 58 is provided. Compared with the case where 1st LED51a or 2nd LED55a is arrange | positioned, it can reduce in size.

  In addition, since the first LED 51a is a red LED and the second LED 55a is a green LED, the display by the display device 20 can be represented by a color change. At this time, red generally means that the danger is high, and green often means that the safety is high. Can be conveyed intuitively.

  Furthermore, since the control unit 70 turns on or off the first LED 51a or the second LED 55a provided on one end side and the other end side at the same time, the same information may be displayed on both the one end side and the other end side. it can.

  Furthermore, the characters “ON” are represented on the main surface of the first light guide plate 54, and the characters “OFF” are represented on the main surface of the second light guide plate 58. Two pieces of information “OFF” can be displayed respectively.

  The characters “ON” or “OFF” are respectively represented by a plurality of first diffusion dots 53 or a plurality of second diffusion dots 57, and a black shielding plate 59 is provided inside the second light guide plate 58. Since it is provided, the outline of the characters “ON” or “OFF” can be made clearer than in the case where the shielding plate 59 is not provided.

  In addition, since the LED fixing member 52 is fixed by the first fixing member 62 and the second fixing member 64, the heat generated in the first LED 51 a or the second LED 55 a passes through the LED fixing member 52 and the first fixing member and the second fixing member 52. It is transmitted to the two fixing members 64. For this reason, the heat dissipation efficiency of the first LED 51a and the second LED 55a can be improved, and the possibility of malfunction or malfunction due to heat can be reduced.

  Further, since the LED fixing member 52 and the first fixing member 62 or the second fixing member 64 are in close contact with each other via the TIM, the first LED 51a and the second LED 55a are more compared to the case where the TIM is not provided. The heat radiation efficiency can be improved, and the possibility of malfunction or malfunction due to heat can be reduced in advance.

  Furthermore, the size of the shielding plate 59 is larger than both the first light guide plate 54 and the second light guide plate 58, and the control unit 70 is provided at a position between the display unit 50 and the display unit 50. Therefore, the control unit 70 is not visually recognized by the shielding plate 59 via the first light guide plate 54 or the second light guide plate 58. By doing this, it is excellent in aesthetics.

  In addition, since the air hole 34 is provided on the lower surface of the main body 30, water vapor or the like inside the main body 30 can be discharged to the outside, and the possibility of condensation in the main body 30 is reduced in advance. be able to. At the same time, even if water enters the inside due to rain or the like, it can be discharged to the outside, so that the possibility of water collecting inside can be reduced. Moreover, since it is provided in the lower surface of the main-body part 30, even if it is a case where it installs outdoors, possibility that rain etc. will penetrate | invade into the inside of the main-body part 30 can be reduced beforehand. In other words, the possibility of malfunction or failure of electronic components due to water such as condensation can be reduced in advance.

  In addition, since the lid portion 40 is provided with the collar portion 46, even when it is placed outdoors during the daytime, the light is reflected by the light such as the sun hitting the window 44, and the first guide The possibility that the light plate 54 or the second light guide plate 58 becomes difficult to see can be reduced in advance.

  Next, an outline of a configuration of the display device 120 according to the second embodiment of the present invention will be described in detail with reference to FIGS. Here, FIG. 6 is a perspective view showing an outline of the configuration of the display device 120, and FIG. 7 is a cross-sectional view showing a cross section AA in FIG. The display device 120 according to the second embodiment includes a main body part 130, lid parts 140 provided at both ends of the main body part 130, a display unit 150 attached to the inside of the main body part 130 (see FIG. 7), An angle adjustment member 160 that adjusts the angle of the display unit 150 (see FIG. 7) and a control unit 70 that supplies power to the display unit 150 (see FIG. 7) are provided.

  As shown in FIG. 6, the main body 130 is a metal frame having a substantially rectangular parallelepiped shape. The main body 130 is provided with two hinges 132 provided at each end of the upper surface and one side surface (the front side surface in FIG. 6). ) Provided with a plurality of air holes 34. Lid portions 140 are attached to both ends of the main body portion 130 by hinges 132 so as to be openable and closable. When the lid portion 140 is in a closed state, a stop member 136 ( 7), the main body 130 is fixed. The plurality of air holes 34 provided on one side surface of the main body 130 are through-holes penetrating the one side surface of the main body 130, and are covered with an air hole cover 35 whose bottom surface is open. For this reason, even when the main body 130 is disposed outdoors, it is possible to reduce the possibility that rain, dust, dust, and the like from the side face will enter the inside of the main body 130. Moisture due to water vapor or the like can be discharged to the outside. A power supply through hole 38 through which a power cable (not shown) for connecting the control unit 70 and an external power supply (not shown) can be passed is provided on the other side surface of the main body 130. It is covered with a through hole cover (see FIG. 7).

  As shown in FIG. 6, the lid 140 is a substantially rectangular parallelepiped member made of metal, and has a substantially rectangular glass window 44 at the center of the front surface 42. A protruding collar 46 is provided. When the lid portion 40 is fixed to the main body portion 30 in a closed state, the front surface 42 of the lid portion 40 is fixed to the main body portion 30 while being inclined downward. When setting, sunlight is irradiated onto the window 44 and reflected by the window 44, thereby reducing the possibility that the first light guide plate 54 or the second light guide plate 58, which will be described later, becomes difficult to visually recognize. . At this time, since the collar portion 46 is provided not only on the upper surface side but also on the side surface side, when the sunlight hits the window 44 from a low angle, such as in the morning or evening, the first light guide plate 54 or the second light guide plate 54 is similarly provided. The possibility that the light guide plate 58 becomes difficult to visually recognize can be reduced in advance.

  As shown in FIG. 7, the display unit 150 includes a first light guide plate 54 in which a first LED substrate 51 having a plurality of first LEDs 51 a is disposed around and a second LED substrate 55 having a plurality of second LEDs 55 a in the periphery. The arranged second light guide plate 53 and the shielding plate 59 whose surface is painted black are fixed in a state of being arranged substantially in parallel. As shown in FIG. 8, the display unit 150 is rotatably attached to the inner side surface of the lid 140, and the lower side is in contact with an angle adjusting member 160 described later. For this reason, when the angle of the display unit 150 is changed using an angle adjusting member 160 described later, the angle is changed while the first light guide plate 54, the second light guide plate 58, and the shielding plate 59 are kept substantially parallel to each other. Can do. By carrying out like this, the effort at the time of changing an angle can be reduced compared with the case where the angles of the 1st light-guide plate 54, the 2nd light-guide plate 58, and a shielding board are each changed. In addition, the method of attaching the display unit 150 to the cover part 140 so that rotation is possible can be attached by various well-known methods, for example using a rotation axis | shaft. The first LED 51a, the second LED 55a, the LED fixing member 52, the first light guide plate 54, the second light guide plate 58, the shielding plate 59, and the control unit 70 are the same as those in the first embodiment, and thus the same. A reference numeral is assigned and description thereof is omitted here.

  As shown in FIG. 7, the angle adjusting member 160 is a substantially cylindrical member having a bulged center, a spiral groove 162 at one end side, a gripping part 164 at the central part, and a pressing part 166 at the other end side. Each is provided. The angle adjusting member 160 is screwed into a spiral hole provided below the lid part 140, and when the lid part 140 is closed by the main body part 130, the pressing part 166 is connected to the lower surface of the display unit 150. The pressing part 166 is provided so as to contact. For this reason, when the pressing portion 166 is moved away from the lid portion 140 by rotating the angle adjusting member 160, the pressing portion 166 moves below the display unit 150 as the lid portion 140 is closed by the main body portion 130. Press the side. In this state, by fixing the lid part 140 to the main body part 130 in a closed state, the display unit 150 is also pressed by the pressing part 166, and the display unit 150 is inclined (the lower part is inclined inward). Can keep. In order to loosen the inclination of the display unit 150, the angle adjusting member 160 may be rotated in the opposite direction to move the pressing portion 166 in a direction approaching the lid portion 140.

  According to the display device 120 of the second embodiment described in detail above, the display units 50 including the first light guide plate 54 and the second light guide plate 58 are provided on both ends of the main body 130, respectively, and the control unit 70. The first LED 51a provided on the side surface side of the first light guide plate 54 or the second LED 55a provided on the side surface side of the second light guide plate 58 is lit by the power supplied from. At this time, since the first LED 51a is disposed on the side surface of the first light guide plate 54 and the second LED 55a is disposed on the side surface of the second light guide plate 58, the back surface side of the first light guide plate 54 or the second light guide plate 58 is provided. Compared with the case where 1st LED51a or 2nd LED55a is arrange | positioned, it can reduce in size.

  In addition, since the first LED 51a is a red LED and the second LED 55a is a green LED, the display by the display device 120 can be represented by a color change. At this time, red generally means that the danger is high, and green often means that the safety is high. Can be conveyed intuitively.

  Furthermore, since the control unit 70 turns on or off the first LED 51a or the second LED 55a provided on one end side and the other end side at the same time, the same information may be displayed on both the one end side and the other end side. it can.

  Furthermore, the characters “ON” are represented on the main surface of the first light guide plate 54, and the characters “OFF” are represented on the main surface of the second light guide plate 58. Two pieces of information “OFF” can be displayed respectively.

  The characters “ON” or “OFF” are respectively represented by a plurality of first diffusion dots 53 or a plurality of second diffusion dots 57, and a black shielding plate 59 is provided inside the second light guide plate 58. Since it is provided, the outline of the characters “ON” or “OFF” can be made clearer than in the case where the shielding plate 59 is not provided.

  The display unit 50 is rotatably attached to the upper surface side of the lid portion 40, and the lower surface side is pressed inward of the main body 30 by the pressing portion 166, whereby the angle of the display unit 50 is set to a desired angle. The main surfaces of the first light guide plate 54 and the second light guide plate 58 can be oriented in a desired direction. By doing so, for example, the first light guide plate 54 and the second light guide plate 58 may be difficult to see even when installed in a bright place such as outdoors by being directed obliquely downward of the display unit 50. Can be reduced in advance. In addition, visibility can be improved when viewed from below.

  The size of the shielding plate 59 is larger than both the first light guide plate 54 and the second light guide plate 58, and the control unit 70 is provided at a position between the display unit 50 and the display unit 50. The control unit 70 is not visually recognized by the shielding plate 59 via the first light guide plate 54 or the second light guide plate 58. By doing this, it is excellent in aesthetics.

  Furthermore, since the air hole 34 is provided on the side surface of the main body 130, water vapor or the like inside the main body 30 can be discharged to the outside, and the possibility of condensation in the main body 30 is reduced. can do. In addition, since the air hole 34 is covered with the air hole cover 35, there is a possibility that rain, dust, or the like may invade the inside of the main body portion 130 compared with the case where the air hole 34 is not covered with the air hole cover 35. Can be reduced. In other words, the possibility of malfunction or failure of electronic components due to water such as condensation can be reduced in advance.

  In addition, since the lid portion 40 is provided with the collar portion 46, even when the lid portion 40 is placed outdoors during the day, the light is reflected by the light from the sun or the like hitting the window 44, and the first light guide plate The possibility that 54 or the second light guide plate 58 becomes difficult to see can be reduced in advance.

  Note that the present invention is not limited to the first or second embodiment described above, and it goes without saying that the present invention can be implemented in various modes as long as it belongs to the technical scope of the present invention.

  For example, in the first embodiment described above, the display unit 50 is attached to the main body 30, but as shown in FIG. 8, the lid 40 is attached via the lid attachment member 69 of the lid 40. You may attach to an inner surface. Here, FIG. 8 is a perspective view showing an outline of the configuration of the display device 20 with a part of the lid 40 cut away. Thus, by attaching the display unit 50 to the back side of the lid 40, the lid 40 can be opened without providing an opening / closing mechanism in the display unit 50, as in the first embodiment. The control unit 70 can be operated.

  In the second embodiment described above, the display unit 150 is attached to the lid portion 40. However, as shown in FIG. 9, a plurality of fixing members are assembled on the bottom surface of the main body portion 30 to form a main body. You may fix to the bottom face of the part 30. FIG. In this way, as in the first embodiment, it is possible to prevent the possibility that the display unit 50 vibrates or resonates when vibration is applied from the outside.

  In the first or second embodiment described above, the first light guide plate 54 and the second light guide plate 58 are methacrylic resin plates having transparency. In addition to methacrylic resins such as methyl methacrylate and ethyl methacrylate, various materials such as acrylic resins such as methyl acrylate and ethyl acrylate, ABS resins, polycarbonate, and polyethylene are used. Can do. In any case, the same effect as the above-described embodiment can be obtained.

  In the first or second embodiment described above, the first light guide plate 54 is a plate-like member. However, as shown in FIG. 9, the left side surfaces of the first light guide plate 154 and the second light guide plate 158. In addition, the right side surface may have a gentle inclined surface from the center to both ends. If it carries out like this, since the light irradiated from 1st LED51a will gather easily in the center direction of the 1st light-guide plate 154, a center part becomes brighter. As a result, the “ON” character provided in the central portion shines brighter, and the visibility can be improved. Moreover, it is good also as what has an inclined surface only in either the 1st light-guide plate 154 or the 2nd light-guide plate 158, and has the inclined surface in all the side surfaces of the 1st light-guide plate 154 or the 2nd light-guide plate 158. Alternatively, only one of the four side surfaces may have an inclined surface. FIG. 5 is a perspective view showing an outline of the configuration of the display unit 250 according to another embodiment. The same components as those of the display unit 150 are denoted by the same reference numerals, and description thereof is omitted here.

  In the first or second embodiment described above, the first diffusion dot 53 having a substantially quadrangular pyramid shape is formed on the outer side of the main surface of the first light guide plate 54 and the second light guide plate 58 (the side close to the window 44 of the main surface). However, the present invention is not limited to a substantially quadrangular pyramid shape, and may have various shapes such as a substantially triangular pyramid shape, a prismatic shape, or a hemispherical shape. In addition, the surface may be processed using a laser processing machine or a plotter, or may be processed into a convex shape by screen printing or silk printing, or by injection molding using a mold with concaves and convexes in advance. It may be formed. In any case, the same effect as the above-described embodiment can be obtained.

  In the first or second embodiment described above, the first diffusing dots 53 and the second diffusing dots 57 are arranged so that the surface corresponding to the bottom surface of the quadrangular pyramid is located on the inner side (side closer to the control unit 70). Although the light guide plate 54 or the second light guide plate 58 is provided, the first diffusion dot 53 and the second diffusion dot 57 may be provided on the opposite side (side closer to the window 44), or the first guide It may be provided on both side surfaces of the light plate 54 or the second light guide plate 58. In any case, the same effect as the above-described embodiment can be obtained.

  In the first or second embodiment described above, the first diffusing dots 53 and the second diffusing dots 57 are all provided at the same size and at equal intervals. May be smaller than the second diffusion dot 57. Since the first light guide plate 54 provided with the first diffusion dots 53 is arranged in the outer side direction of the main body 30 or the main body 130 than the second light guide plate 58 provided with the second diffusion dots 57, the second diffusion dots By reducing 57, the possibility that the light diffused by the first diffusion dot 53 is diffused by the second diffusion dot 57 can be reduced in advance. In other words, since the light diffused by the first diffusion dot 53 becomes difficult to be diffused by the second diffusion dot 57, the first diffusion dot 53 can be seen more clearly.

  In the first or second embodiment described above, the first diffusing dots 53 and the second diffusing dots 57 are all provided at the same size and at equal intervals. May be larger than the pitch at which the second diffusion dots are provided. In this way, when the second light guide plate 58 is viewed from the outside, the possibility that the first diffusion dots 53 and the second diffusion dots 57 overlap can be reduced in advance, and is represented by the second diffusion dots 57. It is easy to see the word “cut”.

  In the first or second embodiment described above, the first diffusing dots 53 arranged in the shape of “ON” on the surface of the first light guide plate 54 and the “OFF” on the surface of the second light guide plate 58. Each of the second diffusion dots 57 arranged in the shape of a character is provided. However, these indications are not limited to “OFF” or “ON”, and various character shapes can be formed according to the purpose. May be omitted. Also in this case, the same effect as the above-described embodiment can be obtained.

  In the first or second embodiment described above, the window 44 is made of glass. However, the window 44 may be made of nonreflective glass, antireflection glass, low reflection glass, polarizing glass, non-glare glass, or the like. In addition, an optical filter or a polarizing filter may be used, or a plurality of these may be used in combination. Specifically, for example, it may be combined by sticking an optical filter on the surface of the non-reflective glass, or may be combined by using a polarizing glass and a non-glare glass in an overlapping manner, or the polarizing glass above. May be combined by disposing antireflection glass below and three or more kinds may be arbitrarily combined. In either case, when used in a bright place such as outdoors, the display of the first light guide plate 54 or the second light guide plate 58 displays external light (for example, sunlight) as compared to the case where it is made of glass. Etc.) can be prevented or reduced in advance.

  In the first or second embodiment described above, the protruding flange portion 46 is provided on the outer peripheral portion of the front surface 42 of the lid portion 40 or the lid portion 140, but the flange portion 46 is not required. Good. When the first light guide plate 54 or the second light guide plate 58 is not installed in a place where the light from the outside is reflected by the window 44, the same as in the above-described embodiment, even without the flange 46. The effect is obtained.

  In the first or second embodiment described above, the circuit of the control unit 70 is provided with a plurality of relays (relays), and either one of the two first LEDs 51a or the two second LEDs 55a is provided by this relay. However, the present invention is not limited to this method as long as power can be supplied to either one of the two first LEDs 51a or the two second LEDs 55a. For example, the two first LEDs 51a Alternatively, either one of the two second LEDs 55a may be directly supplied with electric power from the outside, or the control unit 70 has a power generation or power storage device, and the power supplied from the power generation or power storage device is You may supply to 1st LED51a or two 2nd LED55a. In any case, the same effect as the above-described embodiment can be obtained.

  In the first or second embodiment described above, the control unit 70 is attached at a position between the display unit 50 and the display unit 50 provided on both ends of the main body 30. It is not limited to this place, for example, it may be provided on one or both of the first LED board 51 or the second LED board 55, or provided on one or both of the display units 50 (display units 150). It may be done. In either case, the same effect as the above-described embodiment can be obtained.

  In the second embodiment described above, the angle adjusting member 160 is provided in the main body 130, but the angle adjusting member 160 may not be provided. Even in this case, when the display device 120 is attached, the same effect as that of the above-described embodiment can be obtained by attaching the display unit 50 at a desired angle in advance.

  In the first or second embodiment described above, the air hole 34 is provided on the lower surface of the main body 30 or the side surface of the main body 130, but the air hole 34 may not be provided. Even in this case, the same effect as that of the above-described embodiment can be obtained as long as the inside of the main body 30 is not condensed.

  In the first or second embodiment described above, the first LED 51a is a red LED and the second LED 55a is a green LED. However, the first LED 51a is not limited to this combination. Any combination of light sources may be used as long as the second LED 55a emits light in different colors. In either case, the same effect as the above-described embodiment can be obtained.

  As shown in the above-described embodiment, it can be used as a display device that displays the open / close state of the disconnect switch by being installed on the information display field, particularly on a route.

20, 120 ... display device, 30, 130 ... main body, 32 ... hinge,
34 ... Air hole, 35 ... Air hole cover, 36, 136 ... Stopping member, 38 ... Power supply through hole,
40, 140 ... lid, 42 ... front, 44 ... window, 46 ... buttocks,
50, 150, 250 ... display unit, 51 ... first LED substrate,
51a ... 1st LED, 52 ... LED fixing member, 53 ... 1st diffused dot,
54, 154 ... first light guide plate, 55 ... second LED substrate, 55a ... second LED,
57 ... second diffusion dots, 58, 158 ... second light guide plate, 59 ... shielding plate,
60 ... Radiating plate, 62 ... First fixing member, 64 ... Second fixing member, 65 ... Hinge,
67 ... Screw, 68 ... Third fixing member, 69 ... Lid attaching member, 70 ... Control unit,
160, an angle adjusting member, 162, a spiral groove, 164, a gripping portion, 166, a pressing portion.

Claims (16)

In a display device that emits light from both ends of the main body,
Two display units that are provided on one end side and the other end side of the main body, respectively, and display at least one of the first display information and the second display information;
A shielding plate that prevents the first display information or the second display information displayed on the display unit provided on the one end side from being visually recognized from the other end side;
With
The display unit is capable of displaying the first light guide plate capable of displaying the first display information, a plurality of first light sources arranged on the side of the first light guide plate, and the second display information. A second light guide plate disposed on the inner side of the main body than the first light guide plate, and a plurality of second light sources disposed on a side surface side of the second light guide plate.
Display device. In a display device that emits light from both ends of the main body,
Two display units provided on one end side and the other end side of the main body,
A power supply unit that supplies power to the two display units and starts or stops supplying power to the display units;
With
The display unit is capable of displaying a first light guide plate capable of displaying first display information, a plurality of first light sources arranged on a side surface of the first light guide plate, and second display information, A second light guide plate disposed inside the main body from the first light guide plate, a plurality of second light sources disposed on a side surface of the second light guide plate, and the main body from the second light guide plate A surface arranged on the inside of the dark-colored shielding plate, and
The power supply unit does not light the other when turning on either the first light source or the second light source,
Display device. The display device according to claim 1 or 2,
When turning on the first light source of the display unit provided on the one end side of the main body portion, turning on the first light source of the display unit provided on the other end side of the main body portion, Without lighting the second light source of both display units provided on both ends of the main body,
When turning on the second light source of the display unit provided on the one end side of the main body, while turning on the second light source of the display unit provided on the other end side of the main body, A control unit that controls the turning on and off of the first light source and the second light source so as not to turn on both the first light sources of the display units provided on both ends of the main body,
With
Display device. The second light source is a light source that emits light with a color different from that of the first light source.
The display device according to claim 1. The first display information is composed of characters, symbols, figures or combinations thereof provided on the main surface of the first light guide plate,
The second display information is composed of characters, symbols, figures or a combination thereof different from the first display information provided on the main surface of the second light guide plate.
The display apparatus of any one of Claims 1-4. The first display information and the second display information are represented by a plurality of diffusion dots,
The diffusion dots are arranged on the main surface of the first light guide plate and the main surface of the second light guide plate,
The display apparatus of any one of Claims 1-5. The display device according to any one of claims 1 to 6,
A first light source fixing member to which a plurality of the first light sources are attached;
A second light source fixing member to which a plurality of the second light sources are attached;
A metal fixing member for fixing the first light source fixing member or the second light source fixing member to the display unit;
With
Display device. The first light source fixing member and the second light source fixing member are in close contact with the fixing member via a heat medium, respectively.
The display device according to claim 7. The display unit is attached so that the orientation of the main surfaces of the first light guide plate and the second light guide plate can be changed.
The display apparatus of any one of Claims 1-8. The main body is provided with lids for opening and closing both end faces on both ends,
The lid has a window through which the first light guide plate and the second light guide plate can be visually recognized.
The display apparatus of any one of Claims 1-9. The lid part further has protrusions that protrude outwardly on the upper surfaces of both ends.
The display device according to claim 10. The window is made of one or a combination of two or more selected from the group consisting of antireflection glass, low reflection glass and non-reflection glass.
The display device according to claim 10 or 11. The two display units are provided in the lid part instead of the main body part,
The display apparatus of any one of Claims 10-12. The shielding plate is larger than both the first light guide plate and the second light guide plate,
The display device according to claim 1. The main body further has a through hole on a bottom surface or a side surface.
The display apparatus of any one of Claims 1-14. The first light source is a light source that emits red light;
The second light source is a light source that emits green light.
The display apparatus of any one of Claims 1-15.

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