Display device

Abstract

To provide a display device that can appropriately prohibit guidance so as to correspond to the display of a plurality of evacuation directions.SOLUTION: A display device 10 comprises a first display part 30, and a second display part 50. The first display part 30 displays a first evacuation direction pattern 35, and a second evacuation direction pattern 36 whose direction is different from that of the first evacuation direction pattern 35. The second display part 50 is arranged on the side of a front surface of the first display part 30, comprises a first prohibition pattern 57 at a position overlapping with the first evacuation direction pattern 35 in a front view from the side of the front surface, and a second prohibition pattern at a position overlapping with the second evacuation direction pattern 36 in the front view, and displays the first prohibition pattern 57 or the second prohibition pattern in accordance with information acquired from the outside.SELECTED DRAWING: Figure 4

Description

[Technical field]

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

[0002] 2. Description of the Related Art Conventionally, there is a display device that includes a first display section that displays guidance and a second display section that displays a message prohibiting guidance on the front side of the first display section.

[0003] Some guidance displays display multiple evacuation directions, and it is desirable to be able to appropriately prohibit guidance even when such multiple evacuation directions are displayed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2021-163619 A Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a display device that can appropriately prohibit guidance in response to the display of a plurality of evacuation directions. [Means for solving the problem]

[0006] A display device according to an embodiment includes a first display unit and a second display unit. The first display unit displays a first evacuation direction pattern and a second evacuation direction pattern in a direction different from the first evacuation direction pattern. The second display unit is disposed on the front side of the first display unit, has a first prohibited pattern at a position overlapping the first evacuation direction pattern in a front view from the front side, and has a second prohibited pattern at a position overlapping the second evacuation direction pattern in a front view, and displays the first prohibited pattern or the second prohibited pattern according to information acquired from the outside. Effect of the Invention

[0007] According to the embodiment, it is expected to provide a display device that can appropriately prohibit guidance in response to a display of a plurality of evacuation directions. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view of a display device showing a first embodiment. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a front view of the display device in which the first and second prohibited patterns are not displayed. [Figure 4] FIG. 4 is a front view showing the first prohibited pattern of the display device. [Diagram 5] FIG. 4 is a front view showing a second prohibited pattern of the display device. [Figure 6] FIG. 2 is a front view showing the first and second prohibited patterns of the display device; [Figure 7] FIG. 2 is a front view showing the first, second and third prohibited patterns of the display device. [Figure 8] 4 is an explanatory diagram illustrating a relationship between an evacuation guidance pattern and a prohibition pattern of the display device. FIG. [Figure 9] FIG. 2 is an explanatory diagram showing the display device as viewed from above. [Figure 10] FIG. 2 is a circuit diagram of an example of a display system using the display device. [Figure 11] FIG. 4 is a circuit diagram of another example of a display system using the display device. [Figure 12] 13 shows a second embodiment, where (a) is a front view of the display device, (b) is a side view of the display device, (c) is a front view of the display device with the first evacuation direction pattern hidden, and (d) is a front view of the display device with the first evacuation direction pattern and the second evacuation direction pattern hidden. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the first embodiment will be described with reference to FIGS.

[0010] A display device 10 is shown in Fig. 1. The display device 10 is an emergency light for guiding evacuees to evacuation routes. Although a ceiling-suspended type is shown in Fig. 1, the display device 10 may be any of a ceiling-mounted type, a ceiling-embedded type, a wall-mounted type, a wall-embedded type, and a floor-mounted type.

[0011] The display device 10 comprises a main body 11 which is an emergency light, a first display unit 12 which is an emergency display unit possessed by the main body 11 and provided on the front side of the main body 11, a second display unit 13 which is a prohibition display unit disposed on the front side, which is the display surface side, of the first display unit 12 of the main body 11, a mounting member 14 to which the main body 11 having the first display unit 12 and the second display unit 13 are attached, and an arm 15 which is an installation member for supporting the mounting member 14 and installing the display device 10 on a ceiling surface.

[0012] As shown in FIG. 2, the front side of the main body 11 is a display screen side, and the front side of the main body 11 is open.

[0013] The display device 10 includes a first battery 20 and a first power supply unit 21 for the first display unit 12, and the first battery 20 and the first power supply unit 21 are disposed in the main body 11. The first battery 20 is a rechargeable secondary battery. The first power supply unit 21 includes a power conversion unit that converts input power input from an external power supply such as a commercial AC power supply into a predetermined lighting power, a charging / discharging unit that charges and discharges the first battery 20, a communication unit that communicates with a higher-level device, and a control unit that controls the first display unit 12. The first power supply unit 21 converts the input power into a predetermined lighting power and supplies it to the first display unit 12 while charging the first battery 20 during normal operation when power is input from an external power supply such as a commercial AC power supply. The first power supply unit 21 also converts the power from the first battery 20 into a predetermined lighting power and supplies it to the first display unit 12 during a power outage of the external power supply.

[0014] The display device 10 also includes a second battery 22 and a second power supply unit 23 for the second display unit 13, in addition to the first battery 20 and the first power supply unit 21 for the first display unit 12. The second battery 22 and the second power supply unit 23 are disposed on the second display unit 13 side, outside the main body 11. The second battery 22 is a rechargeable secondary battery. The second power supply unit 23 includes a power conversion unit that converts input power input from an external power supply such as a commercial AC power supply to a predetermined lighting power, a charging / discharging unit that charges and discharges the second battery 22, a communication unit that communicates with a higher-level device, and a control unit that controls the second display unit 13. The second power supply unit 23 converts the input power into a predetermined lighting power so that it can be supplied to the second display unit 13 and charges the second battery 22 during normal times when power is input from an external power supply such as a commercial AC power supply. Furthermore, the second power supply unit 23 is capable of converting the power from the second battery 22 into a predetermined lighting power and supplying it to the second display unit 13 during a power outage of the external power supply.

[0015] The first display unit 12 includes a first display section 30, which is a guidance display section that displays an evacuation direction for guiding to an evacuation route, and is attached to the front side of the main body 11. The first display unit 12 includes a guidance light guide plate (guidance light guide plate) 31 arranged on the front side of the main body 11, a guidance display plate 32 arranged on the front side of the guidance light guide plate 31, a mounting frame 33 for mounting the guidance light guide plate 31 and the guidance display plate 32, and a guidance light source (guidance light source) 34 that inputs light to the guidance light guide plate 31. A first evacuation direction pattern 35 and a second evacuation direction pattern 36 are displayed on the guidance display plate 32, and the guidance display plate 32 is configured as the first display section 30 that displays the first evacuation direction pattern 35 and the second evacuation direction pattern 36.

[0016] The guide light guide plate 31 is formed in a rectangular plate shape from a synthetic resin having optical transparency, such as an acrylic resin or a polycarbonate resin. The guide light guide plate 31 has an incident surface on the upper end surface facing the guide light source 34, where light from the guide light source 34 is incident, and an exit surface on one main surface on the front side from which the light incident from the incident surface exits. The guide light guide plate 31 may be provided with a light distribution means on the opposite surface facing the exit surface so that the light incident from the incident surface exits from the exit surface. Examples of the light distribution means include dot printing in which ink containing a light transmission control material (white pigment) is regularly printed, a prism cut shape or dot processing in which a surface facing the exit surface is provided with multiple concaves and convexes, and a rough surface processing in which the surface facing the exit surface is polished to provide fine concaves and convexes.

[0017] The guide sign 32 is formed in a rectangular sheet shape from a synthetic resin having optical transparency. As shown in FIG. 3, the first evacuation direction pattern 35 displayed on the guide sign 32 is disposed to the left of a center line c along the vertical direction at the center of the left-right direction of the guide sign 32, and is formed by an arrow pointing to the first evacuation direction, which is the left direction. The second evacuation direction pattern 36 is disposed to the right of the center line c in the left-right direction of the guide sign 32, and is formed by an arrow pointing to the second evacuation direction, which is the right direction, which is different from and opposite to the first evacuation direction pattern 35. The first evacuation direction pattern 35 and the second evacuation direction pattern 36 are provided at positions symmetrical to the left-right direction with respect to the center line c.

[0018] The display area of ​​the evacuation direction patterns 35, 36 of the guidance sign 32 is formed in a green area 37 displayed in green, and the area of ​​the guidance sign 32 other than the evacuation direction patterns 35, 36 is formed in a white area 38 displayed in white. The green area 37 of the evacuation direction patterns 35, 36 of the guidance sign 32 is formed by printing with green ink, for example, silk screen printing or inkjet printing. The white area 38 of the guidance sign 32 is formed by printing with white ink, for example, silk screen printing or inkjet printing. The display area of ​​the evacuation direction patterns 35, 36 of the guidance sign 32 may be white, and the area around the evacuation direction patterns 35, 36 may be green.

[0019] The mounting frame 33 is formed in a frame shape with an opening in the central area of ​​the front surface, holds the guide light guide plate 31 and the guide display plate 32 which are inserted from above, and is attached to the front surface side of the main body 11.

[0020] The guidance light source 34 is configured by a light emitting module having a substrate 39 and a light emitting element 40, such as an LED element, mounted on the substrate 39. The light emitting element 40 faces the incident surface of the guidance light guide plate 31 and emits, for example, white light toward the incident surface of the guidance light guide plate 31. The guidance light source 34 is constantly turned on by power from an external power source or power from the first battery 20, and constantly displays the first display unit 30. Then, the light of the guidance light source 34 is emitted from the guidance light guide plate 31 to the guidance display plate 32, so that the green evacuation direction patterns 35, 36 are displayed in green, and the area other than the evacuation direction patterns 35, 36 is displayed in white.

[0021] The first display unit 30 may be formed integrally with the guide light guide plate 32, and the guide light guide plate 32 may be provided with the evacuation direction patterns 34, 35.

[0022] The second display unit 13 also includes a second display section 50 (see FIG. 6, for example) that displays the prohibition of guidance to an evacuation route by the first display section 30, and this second display section 50 is disposed on the front side of the main body 11, in front of the first display section 30. The second display section 50 is disposed on the projection surface of the first display section 30, and is configured so that light emitted from the first display section 30 passes through the second display section 50. The second display section 50 is disposed at a distance forward from the first display section 30.

[0023] The second display unit 13 has a first light guide plate 51 arranged on the front side of the first display section 30, a second light guide plate 52 arranged on the front side of the first light guide plate 51, a first light source 53 that inputs light to the first light guide plate 51, a second light source 54 that inputs light to the second light guide plate 52, and a mounting frame 55 to which the light guide plates 51, 52 and the light sources 53, 54 are attached.

[0024] The first light guide plate 51 and the second light guide plate 52 are formed in a rectangular plate shape from a colorless, transparent, light-transmitting synthetic resin, such as acrylic resin or polycarbonate resin. The first light guide plate 51 has an incident surface on an upper end surface facing the first light source 53, through which light from the first light source 53 is incident, and guides the light incident on the incident surface toward an end surface on the lower side. The second light guide plate 52 has an incident surface on an upper end surface facing the second light source 54, through which light from the second light source 54 is incident, and guides the light incident on the incident surface toward an end surface on the lower side.

[0025] The first light guide plate 51 displays a first prohibition pattern 57 (see FIGS. 4 and 6) which is an evacuation prohibition mark that is a pictogram such as a picture or letter indicating evacuation prohibition (entry prohibition), for example, a "x" mark. The first prohibition pattern 57 of the first light guide plate 51 is provided at a position overlapping the first evacuation direction pattern 35 in a front view from the front side of the first display unit 30 and the second display unit 50. Similarly, the second light guide plate 52 displays a second prohibition pattern 58 (see FIGS. 5 and 6) which is an evacuation prohibition mark that is a pictogram such as a picture or letter indicating evacuation prohibition (entry prohibition), for example, a "x" mark. The second prohibition pattern 58 of the second light guide plate 52 is provided at a position overlapping the second evacuation direction pattern 36 in a front view. These prohibition patterns 57, 58 are formed, for example, by printing with red ink, such as silk screen printing or inkjet printing, or by uneven processing.

[0026] When first light source 53 is turned on, light incident on first light guide plate 51 is diffusely reflected by first prohibition pattern 57 and emitted forward, thereby displaying first prohibition pattern 57. When second light source 54 is turned on, light incident on second light guide plate 52 is diffusely reflected by second prohibition pattern 58 and emitted forward, thereby displaying second prohibition pattern 58.

[0027] The prohibited patterns 57, 58 of the second display section 50 are different in color and shape from the evacuation direction patterns 35, 36 of the first display section 30. The areas of the prohibited patterns 57, 58 of the second display section 50 have a predetermined transmittance, and the areas other than the prohibited patterns 57, 58 have a higher transmittance than the areas of the prohibited patterns 57, 58. Therefore, the light emitted from the front side of the first display section 30 is attenuated at a predetermined transmittance in the areas of the prohibited patterns 57, 58, and is transmitted almost as it is in the other areas when the light guide plates 51, 52 are colorless and transparent. Therefore, at least the front side of the evacuation direction patterns 35, 36 of the first display section 30 of the second display section 50 has translucency. In other words, at least the areas of the second display section 50 that overlap with the evacuation direction patterns 35, 36 of the first display section 30 have translucency.

[0028] The first light source 53 and the second light source 54 are configured by a light emitting module having a common substrate 60 and a first light emitting element 61 of the first light source 53 such as an LED element and a second light emitting element 62 of the second light source 54 mounted on the substrate 60, and emit, for example, red light including reddish purple. The first light emitting element 61 faces the incident surface of the first light guide plate 51 and causes light to enter the first light guide plate 51 from the incident surface. The second light emitting element 62 faces the incident surface of the second light guide plate 52 and causes light to enter the second light guide plate 52 from the incident surface. The light emitting elements 61 and 62 may emit reddish purple light using, for example, a full-color light emitting element having a red light emitting element, a green light emitting element, and a blue light emitting element in one element. Also, reddish purple light may be obtained by mixing colors using a red light emitting element and a blue light emitting element, or reddish purple light may be obtained by combining an element and a phosphor. The first light source 53 and the second light source 54 are turned on by receiving power from an external power source or power from the second battery 22 under the control of the control unit of the second power source unit 23.

[0029] 2, the mounting frame 55 is formed in a frame shape having an opening 64 on the front side through which the second display unit 50 faces. The light guide plates 51 and 52 are held within the mounting frame 55, and a light source holder 65 for holding the light sources 53 and 54 is attached to the upper side of the mounting frame 55.

[0030] The mounting member 14 mounts the main body 11 with a bracket 67 (see FIG. 2), and also mounts the mounting frame 55 of the second display unit 13 with screws 68 (see FIG. 1) inserted from both side surfaces. Between the mounting member 14 and the mounting frame 55, a second battery 22 and a second power supply unit 23 for the second display unit 13 are disposed.

[0031] Although the display device 10 is a single-sided display type in which only the front side is the display surface, it may be a double-sided display type in which both sides opposite the front side are display surfaces.

[0032] FIG. 10 shows a circuit diagram of an example of a display system 70 using the display device 10. As shown in FIG.

[0033] The display device 10 includes a first display unit 12 and a second display unit 13. The first display unit 12 includes a first battery 20 and a first power supply unit 21, or is connected to the first battery 20 and the first power supply unit 21, and the second display unit 13 includes a second battery 22 and a second power supply unit 23, or is connected to the second battery 22 and the second power supply unit 23.

[0034] The display system 70 is used for evacuation guidance in the event of a fire, etc. The display system 70 includes the display device 10 and a plurality of automatic fire alarms 72, 73.

[0035] Power is supplied from a commercial AC power source E to the power source units 21, 23 of each display unit 12, 13 of the display device 10. For example, a power line that supplies power from the commercial AC power source E to a terminal portion of the second display unit 13 (second power source unit 23) is wired, and a transmission line that sends power from the second display unit 13 is wired to the terminal portion of the first display unit 12 (first power source unit 21).

[0036] A cable is wired from the automatic fire alarms 72, 73 to a terminal section of the second display unit 13 (second power supply unit 23) of the display device 10, and an evacuation prohibition signal from the automatic fire alarms 72, 73 is input to a control section of the second power supply unit 23. When one (first) automatic fire alarm 72 detects a fire with a fire detector on the evacuation route in the first evacuation direction displayed by the first evacuation direction pattern 35 of the display device 10 and acquires detection information from the fire detector, the automatic fire alarm 72 transmits an evacuation prohibition signal in the first evacuation direction (which is a DC 24V lighting signal that lights up the first light source 53) from the automatic fire alarm 72 to the second display unit 13 of the display device 10. Similarly, when the other (second) automatic fire alarm 73 detects a fire by a fire detector on the evacuation route in the second evacuation direction displayed by the second evacuation direction pattern 36 of the display device 10 and acquires the detection information from the fire detector, the automatic fire alarm 73 transmits an evacuation prohibition signal (a DC 24V lighting signal that lights the second light source 54) in the second evacuation direction to the second display unit 13 of the display device 10. The control unit of the second display unit 13 lights up each of the light sources 53, 54 in response to the input of the evacuation prohibition signal from each of the automatic fire alarms 72, 73. Therefore, the second display unit 50 of the second display unit 13 displays the first prohibition pattern 57 or the second prohibition pattern 58 in response to the information acquired from the outside.

[0037] 11 shows a circuit diagram of another example of a display system 70 using the display device 10. The display system 70 of this example includes a central device 74 that is an automatic fire alarm, and two cables for transmitting an evacuation prohibition signal for turning on the first light source 53 and the second light source 54 from the central device 74 are wired to a terminal portion of the second display unit 13 (second power supply unit 23) of the display device 10.

[0038] The central device 74 controls the second display section 50 of the display device 10 in accordance with, for example, a fire situation, an evacuation situation, a disaster situation, etc. In this case as well, the central device 74 transmits an evacuation prohibition signal in the first evacuation direction or the second evacuation direction to the control section of the second power supply unit 23 of the display device 10 in accordance with a situation based on information from a fire detector, etc. The control section of the second power supply unit 23 of the display device 10 displays the first prohibited pattern 57 or the second prohibited pattern 58 in accordance with information acquired from the outside.

[0039] 3, the display device 10 keeps the first display unit 30 in a constantly displaying state, and displays the first evacuation direction pattern 35 and the second evacuation direction pattern 36. The second display unit 50 does not display anything when no evacuation prohibition signal is input from the automatic fire alarms 72, 73 or the central device 74.

[0040] In addition, if a fire detector detects a fire on the evacuation route in the first evacuation direction displayed by the first evacuation direction pattern 35 of the display device 10, and the automatic fire alarm 72 or the central device 74 acquires the detection information from the fire detector, the automatic fire alarm 72 or the central device 74 transmits an evacuation prohibition signal in the first evacuation direction to the second power supply unit 23 of the display device 10.

[0041] When the control unit of the second power supply unit 23 of the display device 10 receives an evacuation prohibition signal in the first evacuation direction from the automatic fire alarm 72 or the central device 74, it turns on the first light source 53 and displays the first prohibition pattern 57 as shown in Fig. 4. That is, the first prohibition pattern 57 of "x" marks is displayed superimposed on the first evacuation direction pattern 35. This allows an evacuee who sees the display device 10 to recognize that evacuation to the evacuation route in the first evacuation direction is prohibited by checking the first prohibition pattern 57 of "x" marks displayed superimposed on the first evacuation direction pattern 35, and allows the evacuee to evacuate in the second evacuation direction displayed in the second evacuation direction pattern 36.

[0042] Furthermore, when the control unit of the second power supply unit 23 of the display device 10 receives an evacuation prohibition signal in the second evacuation direction from the automatic fire alarm 73 or the central device 74, it turns on the second light source 54 to display the second prohibition pattern 58, as shown in Fig. 5. That is, the second prohibition pattern 58 with an "x" mark is displayed superimposed on the second evacuation direction pattern 36. This allows evacuees to recognize that evacuation to the evacuation route in the second evacuation direction is prohibited by checking the second prohibition pattern 58 with an "x" mark displayed superimposed on the second evacuation direction pattern 36, and allows them to evacuate in the first evacuation direction displayed in the first evacuation direction pattern 35.

[0043] In addition, when the control unit of the second power supply unit 23 of the display device 10 receives evacuation prohibition signals in the first evacuation direction and the second evacuation direction from both automatic fire alarms 72, 73 or the central device 74 (either receiving one of the evacuation prohibition signals in the first evacuation direction and the second evacuation direction before receiving the other, or receiving them simultaneously), it turns on the light sources 53, 54 and displays the prohibition patterns 57, 58 as shown in FIG. 6. That is, it displays each of the prohibition patterns 57, 58 with an "x" mark superimposed on each of the evacuation direction patterns 35, 36. This allows evacuees to recognize the prohibition of evacuation to the evacuation routes in the first evacuation direction and the second evacuation direction by checking the prohibition patterns 57, 58 with an "x" mark superimposed on the evacuation direction patterns 35, 36, and allows them to head to another evacuation route.

[0044] As shown in FIG. 7, when the first display unit 30 includes the first evacuation direction pattern 35 and the second evacuation direction pattern 36 and also displays another third pattern 80, such as an evacuation pattern showing an evacuation exit or evacuation route or a third evacuation direction pattern of an arrow, the third prohibition pattern 81 may be displayed superimposed on the third pattern 80. In this case, the second display unit 50 may include a third light guide plate and a third light source for displaying the third prohibition pattern 81. When the third pattern 80 is an evacuation pattern, when both prohibition patterns 57 and 58 are displayed, the third prohibition pattern 81 is displayed superimposed on the evacuation pattern 80, so that the prohibition of evacuation to the evacuation direction patterns 35 and 36 can be further emphasized. When the third pattern 80 is, for example, a third evacuation direction pattern of an arrow in a straight line direction, the third prohibition pattern 81 is displayed when evacuation in the same direction is prohibited.

[0045] Next, the relationship between the evacuation direction patterns 35, 36 of the display device 10 and the prohibited patterns 57, 58 will be described with reference to Fig. 8. Note that Fig. 8 shows the relationship between the first evacuation direction pattern 35 and the first prohibited pattern 57, but the second evacuation direction pattern 36 and the second prohibited pattern 58, which have a similar relationship, will also be described with reference to symbols (not shown in the figure).

[0046] As described above, the evacuation direction patterns 35, 36 are provided at positions symmetrical in the left-right direction with respect to the center line c of the first display unit 30, but the prohibited patterns 57, 58 are provided at positions that do not overlap with the center line c. This relationship makes it possible to prevent the "x" mark displayed by one of the prohibited patterns 57, 58 from interfering with the recognition of the evacuation direction displayed by the other of the evacuation direction patterns 35, 36.

[0047] The distance L1 from the center line c to the "×" marks of the prohibition patterns 57 and 58 is greater than the distance L2 from the center line c to the arrows of the evacuation direction patterns 35 and 36. That is, the "×" marks of the prohibition patterns 57 and 58 are located farther from the center line c than the arrows of the evacuation direction patterns 35 and 36. Due to this relationship, it is possible to suppress the "×" mark displayed by one of the prohibition patterns 57 and 58 from inhibiting the recognition of the evacuation direction displayed by the other of the evacuation direction patterns 35 and 36.

[0048] The vertical length L3 of the prohibition patterns 57 and 58 is greater than the vertical length L4 of the evacuation direction patterns 35 and 36. Due to this relationship, since the "×" marks of the prohibition patterns 57 and 58 are larger than the arrows of the evacuation direction patterns 35 and 36, it is possible to make the "×" marks of the prohibition patterns 57 and 58 overlaid on the evacuation direction patterns 35 and 36 more recognizable.

[0049] The area S1 of the region where the prohibition patterns 57 and 58 do not overlap with the evacuation direction patterns 35 and 36 is greater than the area S2 of the region where the prohibition patterns 57 and 58 overlap with the evacuation direction patterns 35 and 36. For example, it is preferable that the area S1 is about 1.5 times larger than the area S2. Due to this relationship, it is possible to make the "×" marks of the prohibition patterns 57 and 58 overlaid on the evacuation direction patterns 35 and 36 more recognizable. When the region of the evacuation direction patterns 35 and 36 is the green region 37 and the region other than the evacuation direction patterns 35 and 36 is the white region 38, since the region where the prohibition patterns 57 and 58 overlap with the respective color regions 38 becomes larger, the "×" mark can be made more recognizable by the contrast between white and red when the prohibition patterns 57 and 58 are displayed.

[0050] In the arrows of the evacuation direction patterns 35 and 36, there are edge portions 35a and 36a which are the contact points where the horizontal straight portion ("-") and the inclined portion ("<") intersect at an acute angle. The edge portions 35a and 36a of the evacuation direction patterns 35 and 36 overlap with the "×" marks of the prohibition patterns 57 and 58. Due to this relationship, it becomes difficult to recognize the evacuation direction patterns 35 and 36 as arrows, and the "×" marks of the prohibition patterns 57 and 58 can be made more recognizable.

[0051] The inclined sides 35b, 36b of the arrows of the evacuation direction patterns 35, 36 may be parallel to the inclined sides 57b, 58b of the "X" marks of the prohibition patterns 57, 58. This relationship makes it easier to recognize the "X" marks of the prohibition patterns 57, 58 that are displayed superimposed on the arrows of the evacuation direction patterns 35, 36.

[0052] The brightness of the "X" marks when displaying the "X" marks of both prohibition patterns 57, 58 may be higher than the brightness of the "X" marks when displaying the "X" marks of only one of the prohibition patterns 57, 58. This relationship makes it possible to further emphasize the prohibition of evacuation to the evacuation route shown by the display device 10.

[0053] When displaying one of the "X" marks in the prohibition patterns 57, 58, it is preferable that the brightness and chromaticity near the other arrow in the evacuation direction patterns 35, 36 satisfy the ranges of brightness and green and white chromaticity specified for emergency exit lights.

[0054] 9 shows the display device 10 as viewed from above. In the display device 10, for example, when an "x" mark of the first prohibited pattern 57 on the left side is displayed, when an evacuee h looks at the display surface of the second display unit 50 diagonally from a 60° direction to the left side, the "x" mark of the first prohibited pattern 57 on the left side does not overlap with the second evacuation direction pattern 36 on the right side. The same relationship exists when an evacuee h looks at the display surface of the second display unit 50 diagonally from a 60° direction to the right side. This relationship can prevent the "x" mark displayed by one of the prohibited patterns 57, 58 from interfering with the recognition of the evacuation direction displayed by the other of the evacuation direction patterns 35, 36.

[0055] As described above, it is possible to provide the display device 10 that can appropriately prohibit guidance in accordance with a plurality of evacuation directions.

[0056] The display device 10 may use one display such as a liquid crystal display, and display the evacuation direction patterns 35, 36 of the first display unit 30 and the prohibited patterns 57, 58 of the second display unit 50 on the screen of this display. In this case, the display device 10 may be configured as "a display device including: a display unit; and a display control unit that displays a first evacuation direction pattern and a second evacuation direction pattern different from the first evacuation direction on the display unit, and displays the first prohibited pattern at a position overlapping the first evacuation direction pattern in a front view of the screen and the second prohibited pattern at a position overlapping the second evacuation direction pattern in a front view according to information acquired from the outside (e.g., fire situation, evacuation situation, disaster situation, X mark lighting instruction signal, etc.)."

[0057] Next, a second embodiment is shown in Fig. 12. Note that the same components as those in the first embodiment are given the same reference numerals and the description thereof will be omitted.

[0058] Instead of the second display section 50 (second display unit 13) equipped with light guide plates 51, 52 that display prohibited patterns 57, 58 superimposed on the evacuation direction patterns 35, 36 of the first embodiment, a concealing device 90 is provided that makes it possible to hide each of the evacuation direction patterns 35, 36.

[0059] As shown in Figures 12(a) and (b), the shielding device 90 has a first concealing portion 91, such as a roller blind, capable of concealing the first evacuation direction pattern 35, and a second concealing portion 92, such as a roller blind, capable of concealing the second evacuation direction pattern 36.

[0060] As shown in FIG. 12(a), when evacuation in both the left and right directions is not prohibited, both shielding parts 91, 92 are raised and both evacuation direction patterns 35, 36 are displayed.

[0061] 12(c), when evacuation to the left is prohibited, the first shielding portion 91 is lowered to hide the first evacuation direction pattern 35, and only the second evacuation direction pattern 36 is displayed. When evacuation to the right is prohibited, the second shielding portion 92 is lowered to hide the second evacuation direction pattern 36, and only the first evacuation direction pattern 35 is displayed.

[0062] As shown in FIG. 12(d), when evacuation to both the left and right directions is prohibited, both concealing portions 91, 92 are lowered to hide both evacuation direction patterns 35, 36, and the evacuation directions are not displayed.

[0063] The display device is not limited to an emergency exit light, but may also be used as a display device that indicates whether entry is permitted or prohibited for people or vehicles at a gate or the like.

[0064] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0065] 10 Display device 30 1st display section 35 First evacuation direction pattern 36 Second evacuation pattern 37 Green area 38 White area 50 2nd display 57 First Prohibited Pattern 58 Second Prohibited Pattern c center line

Claims

1. a first display unit displaying a first evacuation direction pattern and a second evacuation direction pattern different from the first evacuation direction pattern; a second display unit that is disposed on a front side of the first display unit, has a first prohibited pattern at a position overlapping with the first evacuation direction pattern in a front view from the front side, and a second prohibited pattern at a position overlapping with the second evacuation direction pattern in the front view, and displays the first prohibited pattern or the second prohibited pattern in response to information acquired from an outside source; A display device comprising:

2. the first evacuation direction pattern and the second evacuation direction pattern are provided at positions symmetrical with respect to a center line of the first display unit, The first prohibited pattern and the second prohibited pattern are provided at positions that do not overlap the center line.

2. The display device according to claim 1 .

3. The vertical lengths of the first and second prohibited patterns are longer than the vertical lengths of the first and second evacuation direction patterns, respectively.

3. The display device according to claim 2.

4. The first prohibited pattern and the second prohibited pattern of the second display portion have an area that does not overlap with the first evacuation direction pattern and the second evacuation direction pattern, and the area of ​​the area that does not overlap with the first evacuation direction pattern and the second evacuation direction pattern is larger than an area that overlaps with the first evacuation direction pattern and the second evacuation direction pattern.

2. The display device according to claim 1 .

Images