JP2024130292A - Display device and disaster prevention system - Google Patents

Abstract

To provide a display device and a disaster prevention system which are capable of facilitating visual recognition of emergency information.SOLUTION: A display device includes: a reception section for receiving an emergency signal from an external system; and a projection section for projecting the emergency information onto a floor surface in response to the emergency signal.SELECTED DRAWING: Figure 1

Description

This disclosure relates to a display device and a disaster prevention system.

Patent Document 1 discloses a center device that uses multiple display devices equipped with display units that display images that are visible to subjects inside the monitored area to guide subjects inside the monitored area to evacuate. In this center device, an internal number of people identification unit identifies the number of subjects inside the monitored area. A detection unit detects abnormalities in the monitored area. A display control unit causes an advertisement image to be displayed on the display unit until an abnormality in the monitored area is detected. When an abnormality in the monitored area is detected, the display control unit generates an evacuation guidance image for evacuating subjects from the monitored area based on the number of subjects identified by the internal number of people identification unit, and causes the generated evacuation guidance image to be displayed in place of the advertisement image on at least a portion of the display unit.

JP 2019-79369 A

Guide lights stipulated by the Fire Service Act that constantly display information on evacuation directions or emergency exits have been introduced in many facilities. In contrast, in Patent Document 1, an information display board that normally displays advertisements or guidance, etc., displays emergency information such as evacuation directions or disaster conditions in an emergency. This makes it possible to display even more evacuation information that is prioritized in an emergency on the evacuation route in addition to the guide lights stipulated by the Fire Service Act.

Advertising and promotional display boards such as those in Patent Document 1 are usually installed at a height that provides good visibility, that is, at or above the eye level of visitors. However, in the event of smoke being emitted due to fires, chemical sprays in terrorist acts, explosions, etc., the smoke generally fills the area from near the ceiling. Furthermore, the smoke often flows towards the exhaust and ventilation equipment installed in the ceiling. For this reason, there is a problem that display boards installed at a relatively high position quickly become difficult to see due to the smoke.

The objective of this disclosure is to provide a display device and disaster prevention system that can make emergency information easier to view.

The display device according to the present disclosure includes a receiving unit that receives an emergency signal from an external system, and a projection unit that projects emergency information onto a floor surface in response to the emergency signal.

The display device according to the present disclosure projects emergency information onto the floor surface. This makes it easier to view the emergency information.

1 is a block diagram showing a configuration of a disaster prevention system according to a first embodiment. 1 is a diagram showing a display device according to a first embodiment and an example of continuous content projected onto a floor surface; 1 is a diagram showing a display device according to a first embodiment and an example of continuous content projected onto a floor surface; 1 is a diagram showing a display device according to a first embodiment and an example of continuous content projected onto a floor surface; 1A and 1B are diagrams illustrating an example of a display device according to a first embodiment and emergency information projected onto a floor surface. 13A and 13B are diagrams showing an example of emergency information projected onto a floor surface in accordance with a modification of the first embodiment;

The display device and disaster prevention system according to the present embodiment will be described with reference to the drawings. The same or corresponding components will be given the same reference numerals, and repeated description may be omitted.

Embodiment 1.
1 is a block diagram showing a configuration of a disaster prevention system 100 according to a first embodiment. The disaster prevention system 100 includes a display device 10, an external system that transmits an emergency signal 60 to the display device 10, and a display input unit 30. The display device 10 projects information onto a floor surface. The display device 10 is also called a floor projection type information display device. The projection unit of the display device 10 normally projects regular content, and in an emergency, prioritizes projecting emergency information over the regular content.

In the example of FIG. 1, the external system is described as an emergency warning system group 40. The emergency warning system group 40 includes, for example, a nationwide instantaneous warning system 41, an earthquake warning system 42, an automatic fire alarm system 43, a disaster prevention system 44, and a crime prevention system 45. The nationwide instantaneous warning system is also called J-Alert. As an external system, one or more of the nationwide instantaneous warning system 41, the earthquake warning system 42, the automatic fire alarm system 43, the disaster prevention system 44, and the crime prevention system 45 may be connected to the display device 10. Also, FIG. 1 shows an example in which an emergency signal 60 is input directly from the emergency warning system group 40 to the display device 10. As a large-scale building, the emergency signal 60 may be input to the display device 10 via another system such as a central monitoring system that manages the building.

The display input unit 30 includes a content input device. The content input device allows an image to be input to the display device 10 to be projected by the display device 10. The content displayed by the display device 10 can be revised or abolished by the content input device. The content input from the content input device is stored in the display memory unit 24 of the display device 10 via the content input terminal 22. The content input terminal 22 is a terminal for adding, revising, and abolishing content.

The display memory unit 24 has an emergency display memory unit 26 and a constant display memory unit 28. The emergency display memory unit 26 stores content such as guidance displays to be projected on the floor surface in the event of an emergency. The constant display memory unit 28 stores constant content such as constant advertisements or guidance to be projected on the floor surface at all times.

When an emergency signal 60 is issued from one or more of the systems in the emergency warning system group 40, the emergency signal 60 is received by the emergency signal receiving unit 14 via the emergency priority selecting unit 12, which selects the level of urgency. The emergency signal receiving unit 14 corresponds to a receiving unit that receives the emergency signal 60 from an external system. The emergency signal 60 may be received by wire or wireless communication. When the discrimination unit 16 receives the emergency signal 60 that has a higher priority than the regular content, it determines that an emergency has occurred. Furthermore, the discrimination unit 16 determines what should be displayed as emergency information according to the emergency signal 60.

For example, when emergency signals 60 are simultaneously issued from multiple external systems, the emergency priority selection unit 12 determines the order of the multiple emergency signals 60. The discrimination unit 16 determines the validity of the ranking according to a predetermined determination method. The discrimination unit 16 determines whether to project only the emergency information corresponding to the emergency signal 60 with the highest priority, or to project some or all of the emergency information corresponding to the multiple emergency signals 60. When projecting multiple pieces of emergency information, the multiple pieces of emergency information are projected cyclically, for example, in order at a predetermined interval.

The control unit 18 controls the content to be projected. The control unit 18 normally projects specified content from the regular content. In an emergency, the control unit 18 projects emergency information in priority over the regular content. At this time, the control unit 18 controls the content to be projected and the order, etc., based on the determination result of the determination unit 16. In an emergency, the control unit 18 displays the content specified in advance or the content specified by the emergency signal 60. Content specified by the emergency signal 60 is, for example, J-Alert, earthquake information, etc.

The projection unit 20 projects emergency information onto the floor surface in response to the emergency signal 60. The projection unit 20 projects content under the direction of the control unit 18. As a result, appropriate content can be projected onto the floor surface in an appropriate order of priority in an emergency. Therefore, in an emergency, evacuation guidance can be assisted by the display device 10 of this embodiment in addition to the existing emergency lights based on the Fire Service Act.

Some or all of the functions of the emergency priority selection unit 12, the emergency signal receiving unit 14, the discrimination unit 16, and the control unit 18 can be realized by various control devices such as a microcomputer or a processor. In addition, the function of the display memory unit 24 can be realized by a memory such as a non-volatile memory.

Figures 2 to 4 are diagrams showing an example of a display device 10 according to embodiment 1 and continuous content 50 projected onto a floor surface 52. The display device 10 includes a housing 11 that houses an emergency priority selection unit 12, an emergency signal receiving unit 14, a discrimination unit 16, a control unit 18, a projection unit 20, a content input terminal 22, and a display memory unit 24. The housing 11 is placed on the floor surface 52, for example. The housing 11 should be placed in a position that does not impede passage or evacuation. The housing 11 is placed at the end of a passage, for example. The housing 11 may be movable.

The display device 10 displays information on the floor surface 52 of the passageway where it is easily visible to passersby or evacuees. The display device 10 always displays constant content such as facility information, advertisements, and the time.

Figure 5 is a diagram showing an example of the display device 10 according to the first embodiment and emergency information 51 projected onto a floor surface 52. Figure 6 is a diagram showing an example of emergency information 51 projected onto a floor surface 52 according to a modified example of the first embodiment. In the modified example, the color of the emergency information 51 projected onto the floor surface 52 differs from that of the first embodiment. In the examples of Figures 2 to 5, the information is displayed using green light, but in the example of Figure 6, the information is displayed using red or orange light.

From the viewpoint of making people aware of an emergency, it is preferable to use a light source 20a with a wavelength of 555 nm or more as the light source 20a for projecting the emergency information possessed by the projection unit 20. It is even better if the wavelength of the light source 20a is 580 nm or more. Yellow light of 555 nm or more generally indicates "caution," and orange or red light of 580 nm or more generally indicates "danger." Furthermore, if smoke is emitted due to a fire or the like, the light may be scattered by smoke particles, reducing the visibility of the projected image. On the other hand, light with a long wavelength is less likely to be scattered and has a high transmittance in smoke. This makes it possible to suppress a decrease in visibility.

Furthermore, the luminance of the portion of the floor surface 52 on which the emergency information 51 is projected is preferably 100 cd/m2 ^or more higher than the luminance of the portion on which the emergency information 51 is not projected. The luminance of the portion on which the emergency information 51 is not projected may be the average floor surface luminance of the portion on which the emergency information 51 is not projected. This ensures a minimum level of visibility.

Next, the effects of this embodiment will be described. According to the display device 10 of this embodiment, emergency information can be displayed upon receiving an emergency signal 60 issued by an external system. In this case, there is no need for a worker or the like to switch the projected image of the display device 10 in an emergency; the projected image automatically switches to emergency information upon receiving the emergency signal 60. Therefore, appropriate display can be easily performed both at normal times and in an emergency. Furthermore, emergency information can be displayed quickly in an emergency. Furthermore, it is possible to prevent delays in evacuation of workers due to the task of switching the projected image.

In addition, the display device 10 does not have a sensor for detecting anomalies. An example of a sensor for detecting anomalies is a sensor for detecting gas, smoke, temperature, or earthquakes. The display device 10 does not need to have any sensors at all. The display device 10 of this embodiment receives an emergency signal 60 from an external system. In other words, the display device 10 uses a sensor from the external system. Therefore, the display device 10 can have a simple configuration. This makes it possible to reduce capital investment in the disaster prevention system 100. Also, when multiple display devices 10 are installed, it is possible to reduce duplication of capital investment.

In addition, smoke generally fills from near the ceiling. According to the display device 10 of this embodiment, the emergency information is projected onto the floor, making it easier to see the emergency information. In addition, for example, when emergency information is projected onto the floor from a projector installed on the ceiling, the image may become blurred due to the projection through smoke near the ceiling. In contrast, in this embodiment, the emergency information is projected onto the floor from the display device 10 placed on the floor. Therefore, even if smoke fills the area near the ceiling, there is relatively little smoke in the optical path of the display device 10. Therefore, the emergency information can be displayed more clearly than when projected from the ceiling. In addition, the visibility is less likely to decrease over time due to smoke filling the area. Therefore, the visibility of the emergency information can be further improved.

The effect of smoke on visibility can also be suppressed by embedding the display device in the floor. However, in this case, construction work is required to drill holes in the floor and embed the display device. Particularly on the second floor or higher, construction work may be restricted by the distance between the floor and the ceiling of the floor below, structures under the floor, piping, wiring, etc. In contrast, in this embodiment, the display device 10 can be installed by placing it on the floor. Therefore, the display device 10 can be easily installed without the need for burying work. In addition, by placing a small display device 10 at the end of a passage, etc., the display device 10 can be prevented from interfering with passage and evacuation.

The display device 10 of this embodiment can also be moved to a different location. For example, the display device 10 can be relocated as needed depending on the event space, fixture layout, and people flow. This allows the display device 10 to optimally complement the fixed emergency lights stipulated by the Fire Service Act. If the display device 10 can be moved, the display device 10 may have a means for grasping information about the installation location. The grasping means is, for example, a GPS (Global Positioning System). The control unit 18 may also be able to select a projected image according to the acquired installation location information.

Furthermore, by making the light source 20a for evacuation guidance in an emergency a yellow or red light, it is possible to differentiate it from the constant green light that generally indicates "safety." Furthermore, by displaying the projected image at a brightness of 100 cd/m2 or ^more , visibility can be ensured even in an emergency.

The disaster prevention system 100 may include multiple display devices 10. In this case, the multiple display devices 10 may perform projection in conjunction with an emergency signal 60 from an external system. When the projected images of the multiple display devices 10 are controlled by the emergency signal 60 from the external system, the discrimination unit 16 and the display memory unit 24 do not need to be provided in each display device 10. The emergency signal receiving unit 14, discrimination unit 16, display memory unit 24, etc. may be consolidated in some of the display devices 10 or the external system. This can further reduce capital investment.

Similar to emergency lights and emergency lighting devices, the display device 10 may have a power outage compensation function. Specifically, the display device 10 may have a storage battery and a storage battery charging function so that the display device 10 continues to be illuminated for a predetermined period of time, such as 30 minutes, even during a power outage. The display device 10 may be connected to the power source of a separate emergency power generation device.

The technical features described in this embodiment may be used in any suitable combination.

Various aspects of the present disclosure are summarized below as appendices.
(Appendix 1)
A receiving unit for receiving an emergency signal from an external system;
a projection unit that projects emergency information onto a floor surface in response to the emergency signal;
A display device comprising:
(Appendix 2)
The display device according to claim 1, wherein the display device does not include a sensor for detecting an abnormality.
(Appendix 3)
a housing that houses the receiving unit and the projecting unit,
The display device according to claim 1 or 2, wherein the housing is placed on the floor surface.
(Appendix 4)
The display device described in Appendix 3, wherein the housing is installed at the end of a passageway.
(Appendix 5)
The display device according to claim 3 or 4, wherein the housing is movable.
(Appendix 6)
the projection unit has a light source for projecting the emergency information,
6. The display device according to claim 1, wherein the wavelength of the light source is 555 nm or more.
(Appendix 7)
The display device according to claim 6, wherein the wavelength of the light source is 580 m or more.
(Appendix 8)
The display device described in any one of appendix 1 to 7, characterized in that the luminance of the portion of the floor surface onto which the emergency information is projected is 100 cd/ ^m2 or more higher than the luminance of the portion of the floor surface onto which the emergency information is not projected.
(Appendix 9)
The display device according to any one of claims 1 to 8, wherein the external system is a nationwide instantaneous warning system, an earthquake warning system, an automatic fire alarm system, a disaster prevention system, or a crime prevention system.
(Appendix 10)
The display device according to any one of claims 1 to 9, wherein the projection unit projects regular content at regular times, and in an emergency, projects the emergency information in priority to the regular content.
(Appendix 11)
A display device according to any one of claims 1 to 10,
an external system that transmits the emergency signal to the display device;
A disaster prevention system comprising:
(Appendix 12)
A plurality of the display devices are provided,
The disaster prevention system according to claim 11, wherein the plurality of display devices perform projection in conjunction with the emergency signal from the external system.

10 Display device, 11 Housing, 12 Emergency priority selection unit, 14 Emergency signal receiving unit, 16 Discrimination unit, 18 Control unit, 20 Projection unit, 20a Light source, 22 Content input terminal, 24 Display memory unit, 26 Emergency display memory unit, 28 Continuous display memory unit, 30 Display input unit, 40 Emergency warning system group, 41 Nationwide instantaneous warning system, 42 Earthquake warning system, 43 Automatic fire alarm system, 44 Disaster prevention system, 45 Crime prevention system, 50 Continuous content, 51 Emergency information, 52 Floor surface, 60 Emergency signal, 100 Disaster prevention system

Claims (12)

A receiving unit for receiving an emergency signal from an external system;
a projection unit that projects emergency information onto a floor surface in response to the emergency signal;
A display device comprising: The display device according to claim 1, characterized in that the display device does not have a sensor for detecting anomalies. a housing that houses the receiving unit and the projecting unit,
The display device according to claim 1 , wherein the housing is placed on the floor surface. The display device according to claim 3, characterized in that the housing is installed at the end of a passageway. The display device according to claim 3, characterized in that the housing is movable. the projection unit has a light source for projecting the emergency information,
3. The display device according to claim 1, wherein the wavelength of the light source is 555 nm or more. The display device according to claim 6, characterized in that the wavelength of the light source is 580 m or more. 3. The display device according to claim 1, wherein the luminance of the portion of the floor surface onto which the emergency information is projected is 100 cd/ ^m2 or more higher than the luminance of the portion of the floor surface onto which the emergency information is not projected. The display device according to claim 1 or 2, characterized in that the external system is a nationwide instantaneous warning system, an earthquake warning system, an automatic fire alarm system, a disaster prevention system, or a crime prevention system. The display device according to claim 1 or 2, characterized in that the projection unit projects regular content at all times, and in an emergency, projects the emergency information in priority over the regular content. A display device according to claim 1 or 2;
an external system that transmits the emergency signal to the display device;
A disaster prevention system comprising: A plurality of the display devices are provided,
The disaster prevention system according to claim 11, wherein the plurality of display devices perform projection in conjunction with the emergency signal from the external system.

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