Display device

Abstract

To reduce the burden of inspecting display devices.SOLUTION: A display device 1 includes a display panel 8, a light guide panel 7, a light source unit 6, an imaging unit 4, and a communication unit. The light guide panel 7 guides light. The light source unit 6 supplies light to the display panel 8 through the light guide panel 7. The imaging unit 4 faces at least a part of the light guide panel 7 and generates a captured image of a subject that is formed in an imaging area. The communication unit transmits the captured image to a management device. The imaging unit 4 images the light guide panel 7 side along the thickness direction of a part of the light guide panel 7 that faces the imaging unit 4. At least one of the display panel 8 and the light guide panel 7 has a confirmation area 20, which is an area where the image is formed in the imaging area.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates generally to a display device, and more particularly to a display device including a display panel. [Background technology]

[0002] Patent Document 1 describes an (evacuation) guide light equipped with a camera. The guide light described in Patent Document 1 makes it possible to check, for example, whether there is an obstacle near an emergency exit by capturing images of the area around the guide light and the emergency exit with a camera. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-204409 A Summary of the Invention [Problem to be solved by the invention]

[0004] Here, in the case of an emergency exit light (display device) as described in Patent Document 1, an inspection as to whether or not it lights up normally may be performed, for example, by an operator's visual inspection. In the case of visual inspection by an operator, the operator must go to the site where the display device is installed, which places a heavy burden on the operator in the inspection.

[0005] The present disclosure has been made in consideration of the above-mentioned circumstances, and has an object to provide a display device that can reduce the burden associated with inspecting the display device. [Means for solving the problem]

[0006] In order to solve the above problems, a display device according to one aspect of the present disclosure includes a display panel, a light guide panel, a light source unit, an imaging unit, and a communication unit. The light guide panel guides light. The light source unit supplies light to the display panel via the light guide panel. The imaging unit faces at least a portion of the light guide panel and generates an image of a subject that is imaged in an imaging area. The communication unit transmits the image to a management device. The imaging unit images the light guide panel side along a thickness direction of a portion of the light guide panel that faces the imaging unit. At least one of the display panel and the light guide panel has a confirmation area that is an area imaged in the imaging area. Effect of the Invention

[0007] According to the present disclosure, it is possible to reduce the burden involved in inspecting a display device. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing the appearance of a display device according to a first embodiment. [Diagram 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Diagram 3] FIG. 3 is a cross-sectional view taken along line BB in FIG. [Figure 4] FIG. 4 is a rear view of the imaging unit according to the above embodiment. [Diagram 5] FIG. 5 is a schematic diagram of the imaging unit 4 according to the above embodiment, seen from the front. [Figure 6] FIG. 6 is a schematic diagram of an image captured by the imaging section according to the embodiment. [Figure 7] FIG. 7 is a block diagram showing a configuration of the display system according to the above embodiment. [Figure 8] FIG. 8 is a flowchart showing the operation of the display device according to the above embodiment. [Figure 9] FIG. 9 is a flowchart showing the operation of the management device according to the above embodiment. [Figure 10] FIG. 10 is a flowchart showing the operation of the operation terminal according to the above embodiment. [Figure 11] FIG. 11 is a front view of the display device according to the second embodiment. [Figure 12] FIG. 12 is a bottom view of the display device according to the above embodiment. [Figure 13] FIG. 13 is a side view of the display device according to the above embodiment. [Figure 14] FIG. 14 is an exploded perspective view of the display device according to the above embodiment. [Figure 15] FIG. 15 is a cross-sectional view taken along line CC in FIG. [Figure 16] FIG. 16 is a schematic diagram showing a main part of the first light guide panel according to the above embodiment. [Figure 17] FIG. 17 is a cross-sectional view of a main part of the display device according to the above embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the drawings. In the embodiments described below, elements common to each other are given the same reference numerals, and duplicated descriptions of the common elements will be omitted. The following embodiment is merely one of various embodiments of the present disclosure. Various modifications of the embodiment are possible depending on the design, etc., as long as the object of the present disclosure can be achieved. Each figure described in this disclosure is a schematic diagram, and the ratio of the size and thickness of each component in each figure does not necessarily reflect the actual dimensional ratio. Note that the arrows indicating each direction are merely examples, and are not intended to define the direction when the display system 100 is used. Also, the arrows indicating each direction in the drawings are merely indicated for explanatory purposes, and do not have any substance.

[0010] (Embodiment 1) (1) Overview First, an overview of a display system 100 according to this embodiment will be described with reference to FIGS. 1, 2, 6, and 7. FIG.

[0011] The display system 100 of this embodiment includes a display device 1 and a management device 30. The display device 1 and the management device 30 are configured to be able to communicate with each other.

[0012] As shown in Fig. 1, the display device 1 includes a display panel 8 on which a display pattern 80 is provided, and a light source unit 6. As shown in Fig. 1, the display pattern 80 in this embodiment is a pictogram for evacuation guidance. That is, the display device 1 in this embodiment is an evacuation guidance light.

[0013] FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. As shown in FIG. 2, the display device 1 includes an imaging unit 4. The imaging unit 4 is accommodated in an accommodation space Sp1 inside the housing 9. The imaging unit 4 captures an image of a subject outside the housing 9 through a passage area 71 of the light guide panel 7 and a passage area 81 of the display panel 8. In the following description, the direction in which the display panel 8 and the light guide panel 7 are arranged is defined as the front-rear direction, the display panel 8 side as viewed from the light guide panel 7 is the front, and the light guide panel 7 side as viewed from the display panel 8 is the rear. The direction in which the light source unit 6 and the light guide panel 7 are arranged is defined as the up-down direction, the light source unit 6 side as viewed from the light guide panel 7 is the upper side, and the light guide panel 7 side as viewed from the light source unit 6 is the lower side. The direction perpendicular to the front-rear direction and the up-down direction is defined as the left-right direction.

[0014] The imaging unit 4 captures an image of, for example, a hallway in front of the display panel 8, and transmits a first captured image Im1 and a plurality of (four in the example of FIG. 6) second captured images Im2 as shown in FIG. 6 to the management device 30. In the following description, when the four second captured images Im2 are not to be distinguished from one another, Each of the four second captured images Im2 is referred to as a "second captured image Im2."

[0015] Since the first captured image Im1 is an image of the area in front of the display panel 8, the management device 30 can check whether or not there is an obstacle in a hallway or the like that serves as an evacuation route. If an obstacle is present in a hallway or the like, the management device 30 can ensure the safety of the evacuation route by notifying the user that the obstacle needs to be moved or disposed of.

[0016] The second captured image Im2 of this embodiment includes an image of the confirmation area 20 provided on the display panel 8 (see FIG. 2). The confirmation area 20 of this embodiment is a part of the display panel 8, and is turned on by light supplied from the light source unit 6. When the display device 1, which is an evacuation guide light, is operating normally, the light source unit 6 always supplies light to the display panel 8. Therefore, when the display device 1 is operating normally, the image of the confirmation area 20 included in the second captured image Im2 is always turned on. Conversely, when the image of the confirmation area 20 included in the second captured image Im2 is not turned on, the display device 1 is not operating normally. Therefore, the management device 30 or the operator of the management device 30 can check whether the display device 1 is operating normally by checking the second captured image Im2. The display device 1 of this embodiment reduces the burden of inspecting the display device 1 by transmitting the second captured image Im2 as described above to the management device 30.

[0017] (2)Details Hereinafter, details of the display system 100 according to this embodiment will be described with reference to FIGS.

[0018] (2.1) Display System As shown in Fig. 7, the display system 100 of this embodiment includes a display device 1, a management device 30, and a work terminal 40. The display device 1, the management device 30, and the work terminal 40 are configured to be able to communicate with each other. In the present disclosure, "able to communicate" means that information can be exchanged directly or indirectly via a network NT1 or a repeater by an appropriate communication method such as wired communication or wireless communication. As described above, the display device 1 of this embodiment transmits the first captured image Im1 and the second captured image Im2 generated by the imaging unit 4 to the management device 30.

[0019] (2.2) Display device Next, the display device 1 will be described in detail with reference to FIGS.

[0020] As shown in FIG. 1, the display device 1 of this embodiment is installed on a construction material such as a ceiling 200 of a facility. In the present disclosure, the term "facility" includes residential facilities used for residential purposes, as well as non-residential facilities such as stores (tenants), offices, welfare facilities, educational facilities, hospitals, and factories. Non-residential facilities also include restaurants, amusement parks, hotels, inns, kindergartens, nurseries, and community centers. In other words, the facility may be a residential facility such as an apartment building, or a non-residential facility such as an office building. Furthermore, the facility may include a facility in which residential facilities and non-residential facilities are mixed, for example, with stores on the lower floors and residences on the upper floors. In this embodiment, it is assumed that the facility is an office.

[0021] As described above, the display device 1 of the present embodiment is an evacuation guide light for displaying an evacuation exit or evacuation direction for a facility. Therefore, the area in front of the display device 1 of the present embodiment is basically an evacuation route, and it is preferable that the area in front of the display device 1 does not include any object that may become an obstacle during evacuation.

[0022] As shown in FIG. 2, the display device 1 includes a control unit 2, a secondary battery 3, an imaging unit 4, a display unit 5, a light source unit 6, and a housing 9.

[0023] The housing 9 has a box shape with an opening at the front. A light source unit 6, a light guide panel 7, and a display panel 8 are attached to the front of the housing 9. An accommodation space Sp1 is formed between the housing 9 and the light guide panel 7. The accommodation space Sp1 accommodates the control unit 2, the secondary battery 3, and the imaging unit 4.

[0024] The control unit 2 mainly comprises, for example, a microcontroller having one or more processors and one or more memories. The microcontroller realizes the function of the control unit 2 by executing a program recorded in one or more memories with one or more processors. The program may be recorded in the memory in advance, or may be provided by recording it on a non-transitory recording medium such as a memory card, or may be provided through an electric communication line. In other words, the program is a program for causing one or more processors to function as the control unit 2.

[0025] The control unit 2 of this embodiment performs control to switch the power supply source from the power system PS1 (commercial power source) to the secondary battery 3 based on an instruction from the management device 30. The control unit 2 also controls the imaging unit 4 to constantly generate the first captured image Im1 and the second captured image Im2. The control unit 2 also controls the communication unit 24, which will be described later, to constantly transmit the first captured image Im1 and the second captured image Im2 generated by the imaging unit 4 to the management device 30.

[0026] The secondary battery 3 is an emergency power source that supplies power to the light source unit 6 when the power supply system PS1 fails. The secondary battery 3 is configured to be charged with power supplied from the power supply system PS1 during normal operation when the power supply system PS1 supplies power to the light source unit 6.

[0027] The light source unit 6 is provided at the upper end of the front surface of the housing 9, above the display unit 5. As shown in FIG. 1, the light source unit 6 is substantially rectangular, and the longitudinal direction of the light source unit 6 is along the left-right direction. The light source unit 6 has a light source, for example, an LED (Light Emitting Diode). The light source unit 6 is turned on by power supplied from the power supply system PS1 or the secondary battery 3. The light source unit 6 supplies light to the display unit 5. More specifically, the light source unit 6 supplies light to the display panel 8 from the upper side of the light guide panel 7 via the light guide panel 7.

[0028] 2, the display unit 5 has a light guide panel 7 and a display panel 8. The light guide panel 7 and the display panel 8 are disposed opposite each other in the front-rear direction, and the display panel 8 is disposed in front of the light guide panel 7.

[0029] The light guide panel 7 guides the light supplied from the light source unit 6 to the display panel 8. The light guide panel 7 is formed in a rectangular plate shape from a light-transmitting synthetic resin material such as an acrylic resin or a polycarbonate resin. The light guide panel 7 in this embodiment is milky white.

[0030] The light guide panel 7 is disposed in front of the imaging unit 4 along the thickness direction (front-rear direction) of the light guide panel 7. The light guide panel 7 of this embodiment is disposed to face the imaging unit 4 along the front-rear direction. The light guide panel 7 has two passing areas 71. The passing area 71 of this embodiment is a circular through-hole in a plan view from the front-rear direction, and is provided at a position overlapping with the imaging unit 4 in the front-rear direction. That is, the passing area 71 exposes the imaging unit 4 to the front side of the light guide panel 7. The passing area 71 is an area that enables the imaging unit 4 to capture an image of a subject in front of the display panel 8.

[0031] The display panel 8 is illuminated by light supplied from the light source unit 6 through the light guide panel 7. The display panel 8 is formed in a rectangular plate shape from a synthetic resin material having translucency, such as acrylic resin or polycarbonate resin. As shown in FIG. 1, a display pattern 80 that displays information indicating an evacuation route is provided on the front surface of the display panel 8. The display pattern 80 is a display pattern formed from green and white translucent paint, and is a pictogram imitating a person. Note that the portion with dots in FIG. 1 is a portion formed from green paint. More specifically, the display pattern 80 is a symbol indicating an evacuation exit, and the color of the symbol is green, and the color of the background of the symbol is white. The green color is a green hue in the chromaticity coordinates defined by JIS Z 9103.

[0032] As shown in FIG. 2, the display panel 8 is disposed in front of the imaging unit 4 and the light guide panel 7 along the thickness direction (front-rear direction) of the light guide panel 7. The display panel 8 also has a passing area 81. The passing area 81 in this embodiment is a circular through-hole in a plan view from the front-rear direction, and is provided at a position where at least a part of the passing area 81 overlaps with the passing area 71 of the light guide panel 7 and the imaging unit 4 in the front-rear direction. More specifically, the center of the passing area 81 overlaps with the center of the passing area 71 in a plan view from the front-rear direction. The diameter of the passing area 81 in this embodiment is smaller than the diameter of the passing area 71. The passing area 81 exposes the imaging unit 4 to the front side of the display panel 8. The passing area 81 is an area for enabling the imaging unit 4 to capture an image of a subject in front of the display panel 8.

[0033] The display panel 8 of this embodiment also has a confirmation area 20. The confirmation area 20 is an area that is imaged in a second imaging area A4 of the imaging section 4, which will be described later. FIG. 3 is a cross-sectional view taken along line BB in FIG. 1. The two broken lines shown in FIG. 3 indicate the imaging range 21 of the imaging section 4. The area between the two broken lines is the imaging range 21 of the imaging section 4. At least a portion of the confirmation area 20 is included in the imaging range 21 of the imaging section 4. The confirmation area 20 of this embodiment is provided on the periphery of the passing area 81.

[0034] 1, the display panel 8 of this embodiment has two passing regions 81 and two confirmation regions 20. The light guide panel 7 also has two passing regions 71, and the positions of the two passing regions 71 correspond to the positions of the two passing regions 81. That is, the display unit 5 of this embodiment has two sets of the passing region 71, the passing region 81, and the confirmation region 20.

[0035] 3, the imaging unit 4 is disposed behind the light guide panel 7 so as to face the light guide panel 7 in the thickness direction (front-rear direction) of the light guide panel 7. More specifically, the imaging unit 4 is disposed so as to face one of two passing areas 71 of the light guide panel 7. The imaging unit 4 of this embodiment is disposed so as to face the passing area 71 provided in the lower left corner of the display unit 5 (see FIG. 1). However, depending on the situation of the installation location of the display device 1, the imaging unit 4 may be disposed so as to face the passing area 71 provided in the lower right corner.

[0036] The imaging unit 4 captures an image of the light guide panel 7 side (forward) along the thickness direction (front-rear direction) of the light guide panel 7. More specifically, the imaging unit 4 captures an image of the front of the display panel 8 via the passing area 71 of the light guide panel 7 and the passing area 81 of the display panel 8. The imaging unit 4 of this embodiment generates a first captured image Im1 (see FIG. 6) of the subject imaged in the first imaging region A3 (see FIG. 5) and a second captured image Im2 (see FIG. 6) of the subject imaged in the second imaging region A4 (see FIG. 5).

[0037] The imaging unit 4 has a housing 10, a first support portion 14, a second support portion 11, a cover 12, and a main body portion 13.

[0038] The housing 10 has a cylindrical shape with a central axis extending along the front-rear direction. The housing 10 accommodates a first support part 14, a second support part 11, a lid 12, and a main body part 13 in the internal space of the cylinder.

[0039] The first support portion 14 is disposed along the inner peripheral surface of the housing 10. The first support portion 14 has a base portion 141 and a support portion 142. The base portion 141 has a cylindrical shape with a central axis (Axis) along the central axis of the housing 10. The support portion 142 is formed at the front end of the base portion 141. The support portion 142 has an annular shape and protrudes (inwardly) from the base portion 141 toward the central axis. The support portion 142 has two annular portions aligned along the front-rear direction and protruding inwardly from the base portion 141, and has a cross-sectional shape that is concave outward (C-shaped). The support portion 142 supports the second support portion 11.

[0040] The second support part 11 is disposed along the inner circumferential surface of the support part 142 of the first support part 14. The second support part 11 has a base part 111, a protruding part 112, a spherical part 113, and a screw part 114. The base part 111 has a cylindrical shape with a central axis (Axis) along the central axis of the housing 10. The protruding part 112 has an annular shape and protrudes (outward) from the outer circumferential surface of the base part 111 in a direction away from the central axis. The protruding part 112 fits into the support part 142 of the first support part 14, so that the second support part 11 is supported by the first support part 14. The spherical part 113 is provided on the inner circumferential surface of the base part 111 and supports the main body part 13. The screw part 114 is formed at the rear end of the inner circumferential surface of the base part 111. The screw part 114 supports the lid 12.

[0041] The lid 12 is disposed so as to cover the cylindrical internal space of the second support part 11 from the rear. The lid 12 has a base part 121, a threaded part 122, and a spherical part 123. The base part 121 has a hemispherical shape with a hollow interior. A through hole 124 is provided at the rear end of the base part 121. The through hole 124 has a circular shape in a plan view from the front-rear direction (see FIG. 4). The wiring 15 and the adjustment part 16 described later are passed through the through hole 124. The threaded part 122 is formed at the front end of the outer circumferential surface of the base part 121. The threaded part 122 is fitted into the threaded part 114 of the second support part 11, whereby the lid 12 is supported by the second support part 11. The spherical part 123 is provided on the inner circumferential surface of the base part 121, and supports the main body part 13.

[0042] The main body 13 has a spherical shape. The main body 13 is supported by the spherical portion 113 of the second support portion 11 and the spherical portion 123 of the lid 12, and is supported so as to be rotatable in the up, down, left and right directions. Wiring 15 protrudes from the rear end of the main body 13. In addition, an adjustment portion 16 is provided at the rear end of the main body 13 so as to cover the wiring 15. The wiring 15 and the adjustment portion 16 pass through a through hole 124 of the lid 12.

[0043] 4 is a rear view of the imaging unit 4. For example, a worker installing the display device 1 in a facility can adjust the orientation of the main body unit 13 within the range in which the adjustment unit 16 can move within the through-hole 124 by grasping the adjustment unit 16 or the wiring 15 and moving it up, down, left and right. By adjusting the orientation of the main body unit 13, the worker can change the shooting range 21 (see FIG. 3) of the imaging unit 4.

[0044] 5 is a schematic diagram of the imaging unit 4 as viewed from the front (front). The imaging unit 4 has a lens 17 and a substrate 18.

[0045] The lens 17 converges light from outside the imaging unit 4 onto the imaging plane A0 to form an image. The lens 17 is circular in plan view from the front-rear direction. In this embodiment, the center of the lens 17 overlaps with the centers of the passing areas 71 and 81 in plan view from the front-rear direction. In addition, the diameter of the lens 17 in this embodiment is smaller than the diameter of the passing area 71. The lens 17 is formed from glass or a synthetic resin material having translucency, such as an acrylic resin or a polycarbonate resin.

[0046] The imaging surface A0 is a circular virtual plane, and the normal of the imaging surface A0 is along the front-to-rear direction. The imaging surface A0 has a first area A1 and a second area A2. The first area A1 is the area in the center of the imaging surface A0, and the second area A2 is the area outside the first area A1.

[0047] The substrate 18 of this embodiment is a plate-like shape that is substantially square when viewed from the front-rear direction. The normal line of the mounting surface of the substrate 18 on which the first imaging element 181 and the multiple (four in the example of FIG. 5) second imaging elements 182 are mounted is along the thickness direction (front-rear direction) of the light guide panel 7 (see FIG. 3). The substrate 18 is disposed so that the mounting surface is parallel to the imaging surface A0, and the substrate 18 of this embodiment is disposed behind the imaging surface A0. The substrate 18 has the first imaging element 181 and four second imaging elements 182. The four second imaging elements 182 are disposed above, below, left and right of the first imaging element 181. In the following description, when the four second imaging elements 182 are not distinguished from one another, each of the four second imaging elements 182 is referred to as the "second imaging element 182."

[0048] The first imaging element 181 is, for example, a two-dimensional image sensor such as a CCD (Charge Coupled Devices) image sensor or a CMOS (Complementary Metal-Oxide Semiconductor) image sensor. The first imaging element 181 generates a first captured image Im1 (see FIG. 6) of a subject imaged in the first imaging region A3.

[0049] The first imaging element 181 is provided on the mounting surface of the substrate 18 and protrudes forward from the mounting surface of the substrate 18. The first imaging element 181 is a substantially square plate-like shape when viewed in a plan view from the front-rear direction. The first imaging element 181 is provided on the mounting surface of the substrate 18 so that the first imaging region A3 is included in a part of the first region A1 of the imaging surface A0. The first imaging region A3 is a region that captures an image of a subject formed in the first region A1.

[0050] The second imaging element 182 is, for example, a two-dimensional image sensor such as a CCD (Charge Coupled Devices) image sensor or a CMOS (Complementary Metal-Oxide Semiconductor) image sensor. The second imaging element 182 generates a second captured image Im2 (see FIG. 6) of the subject imaged in the second imaging region A4.

[0051] The second imaging element 182 is provided on the mounting surface of the substrate 18 and protrudes forward from the mounting surface of the substrate 18. The second imaging element 182 has a substantially square plate shape when viewed in a plan view from the front-to-rear direction, and has a smaller area than the first imaging element 181. The second imaging element 182 is provided on the mounting surface of the substrate 18 so that the second imaging region A4 is included in a part of the second region A2 of the image formation surface A0.

[0052] The second imaging region A4 is a region for capturing an image of the subject formed in the second region A2. More specifically, the second imaging region A4 is a region for capturing an image of the confirmation region 20 formed in the second region A2. The four second imaging elements 182 in this embodiment are arranged such that at least one of the four second imaging elements 182 captures an image of the confirmation region 20 even if the shooting range of the imaging unit 4 changes due to the adjustment of the orientation of the imaging unit 4.

[0053] 6 is a schematic diagram of a first captured image Im1 and a second captured image Im2 captured by the imaging unit 4. The display device 1 of this embodiment is installed in a location where a corridor is provided in front of a display panel 8 as shown in FIG.

[0054] The first captured image Im1 captured by the first imaging element 181 includes an image of a corridor. As described above, the management device 30 or an operator of the management device 30 can check whether or not an obstacle exists in a corridor or the like that serves as an evacuation route by checking the first captured image Im1. The first captured image Im1 may be used as an image for crime prevention purposes, or as an image for the purpose of checking that no one has been left behind in an emergency such as a disaster.

[0055] The second captured image Im2 captured by the second imaging element 182 includes an image of the confirmation area 20. As described above, the management device 30 or the operator of the management device 30 can check whether the display device 1 is operating normally by checking the second captured image Im2. As shown in FIG. 1, the confirmation area 20 in this embodiment is colored green (chromatic color), so that when the confirmation area 20 is turned on, it is easy to distinguish the image of the confirmation area 20 from other images included in the second captured image Im2. By making it easy to distinguish the image of the confirmation area 20 from other images included in the second captured image Im2, it is possible to improve the accuracy of determining whether the confirmation area 20 is turned on.

[0056] As shown in FIG. 7, the display device 1 further includes a power supply switching unit 23, a communication unit 24, and a storage unit .

[0057] Based on an instruction from the control unit 2, the power source switching unit 23 switches the source of power supplied to the light source unit 6 between the power system PS1 and the secondary battery 3. That is, the power source switching unit 23 selectively electrically connects the power system PS1 or the secondary battery 3 to the light source unit 6. Note that, in this disclosure, "electrically connected" refers to a connection in an electrically conductive state, and includes not only a direct connection, but also an indirect connection via, for example, a conductor such as an electric wire, a breaker, or a relay (connection device).

[0058] The communication unit 24 is configured to be connectable to a network NT1 such as the Internet by an appropriate communication method such as wired communication or wireless communication. In addition, the communication unit 24 of the present embodiment can perform wireless communication with the communication unit 43 of the work terminal 40.

[0059] The storage unit 26 is configured with a device selected from a ROM (Read Only Memory), a RAM (Random Access Memory), an EEPROM (Electrically Erasable Programmable Read Only Memory), etc. For example, the storage unit 26 stores a first captured image Im1 and a second captured image Im2 generated by the imaging unit 4.

[0060] (2.3) Management device Next, details of the management device 30 will be described with reference to FIG.

[0061] The management device 30 is installed, for example, in a management room of a facility where the display device 1 is installed. The management device 30 of this embodiment is, for example, a personal computer. The management device 30 includes a communication unit 31, a control unit 32, a notification unit 33, a display unit 34, a storage unit 35, a clock unit 36, and an operation unit 37.

[0062] The communication unit 31 is configured to be connectable to a network NT1 such as the Internet by an appropriate communication method such as wired communication or wireless communication.

[0063] The control unit 32 mainly comprises, for example, a microcontroller having one or more processors and one or more memories. The microcontroller realizes the function of the control unit 32 by executing a program recorded in one or more memories with one or more processors. The program may be recorded in the memory in advance, or may be provided by recording it on a non-transitory recording medium such as a memory card, or may be provided through an electric communication line. In other words, the program is a program for causing one or more processors to function as the control unit 32.

[0064] The control unit 32 causes the display unit 34 to display the first captured image Im1 and the second captured image Im2 transmitted from the display device 1.

[0065] Furthermore, the control unit 32 checks whether or not the first captured image Im1 includes an image of an obstacle. For example, the control unit 32 checks whether or not the first captured image Im1 includes an image of an obstacle by performing a pattern recognition process on the first captured image Im1 using a reference image that does not include an image of an obstacle as template data. In the present disclosure, the "pattern recognition process" refers to an image process that recognizes what an object is reflected in an image based on the shape of the object reflected in the image. Examples of this type of pattern recognition process include a pattern matching process and a process of recognizing an object reflected in an image using a trained model created by machine learning. The pattern matching process here is a process of comparing the template data with a comparison target (such as the first captured image Im1) using the template data described above. In addition, as a machine learning method, an appropriate algorithm may be used, for example, a deep learning algorithm may be used.

[0066] When the first captured image Im1 includes an image of an obstacle, the control unit 32 causes the notification unit 33 to notify that an obstacle is placed on the evacuation route. Furthermore, when the first captured image Im1 includes an image of an obstacle, the control unit 32 may cause the storage unit 35 to store information indicating that an obstacle is placed on the evacuation route. On the other hand, when the first captured image Im1 does not include an image of an obstacle, the control unit 32 causes the storage unit 35 to store information confirming that the first captured image Im1 does not include an image of an obstacle.

[0067] Furthermore, the control unit 32 checks whether the image of the confirmation region 20 included in the second captured image Im2 is in a lit state. For example, the control unit 32 checks whether the image of the confirmation region 20 included in the second captured image Im2 is in a lit state by performing a pattern recognition process on the second captured image Im2 using a reference image in which the image of the confirmation region 20 is in a lit state as template data.

[0068] When the image of the confirmation region 20 included in the second captured image Im2 is not in a lit state, the control unit 32 notifies the notification unit 33 that the light source unit 6 of the display device 1 is not lit normally. In other words, when the image of the confirmation region 20 included in the second captured image Im2 indicates that the light source unit 6 of the display device 1 is not lit normally, the control unit 32 notifies the notification unit 33 that the light source unit 6 is not lit normally. Furthermore, the control unit 32 causes the display unit 34 to display that the light source unit 6 is not lit normally. Furthermore, the control unit 32 stores repair data indicating that the light source unit 6 is not lit normally in the storage unit 35. On the other hand, when the image of the confirmation region 20 included in the second captured image Im2 indicates that the light source unit 6 of the display device 1 is lit normally (is in a lit state), the control unit 32 stores information indicating that the light source unit 6 is lit normally in the storage unit 35.

[0069] Furthermore, when an operation to start inspection of the secondary battery 3 is performed on the operation unit 37 by an operator of the management device 30 or the like, the control unit 32 controls the communication unit 31 to transmit an instruction to start the inspection to the display device 1, and performs the inspection. Since it is necessary to determine whether the secondary battery 3 has deteriorated, the inspection of the secondary battery 3 is performed for a predetermined period of time or more, such as 20 minutes or 60 minutes. The control unit 32 performs the inspection and stores information indicating the results of the inspection, such as repair data, in the memory unit 35.

[0070] The notification unit 33 issues a notification about the state of the light source unit 6 of the display device 1 under the control of the control unit 32. In this embodiment, the notification unit 33 is, for example, a speaker. When the image of the confirmation region 20 included in the second captured image Im2 indicates that the light source unit 6 of the display device 1 is not lighting normally, the notification unit 33 issues a sound to notify that the light source unit 6 is not lighting normally.

[0071] The display unit 34 displays various images under the control of the control unit 32. For example, it is an image display device such as a liquid crystal display or an organic EL (Electro Luminescence) display. The operation unit 37 accepts operations performed by an operator of the management device 30. For example, it is a keyboard and a pointing device such as a mouse. The display unit 34 and the operation unit 37 may be realized by a touch panel display in which the display unit 34 and the operation unit 37 are integrally configured.

[0072] The storage unit 35 is configured with a device selected from a ROM (Read Only Memory), a RAM (Random Access Memory), an EEPROM (Electrically Erasable Programmable Read Only Memory), and the like. For example, the storage unit 35 stores the first captured image Im1 and the second captured image Im2 transmitted from the display device 1. The storage unit 35 of this embodiment also stores repair data. The "repair data" in this disclosure includes information indicating in which facility the display device 1 with the light source unit 6 not operating normally is installed and where in the facility the display device 1 is installed. The "repair data" also includes information regarding an abnormality, such as an abnormality in the light source unit 6 or an abnormality in the secondary battery 3.

[0073] The clock unit 36 ​​has a stopwatch function that measures the elapsed time from the start of measurement. When an operation to start inspection of the secondary battery 3 is performed on the operation unit 37 by an operator of the management device 30 or the like, the clock unit 36 ​​starts measurement from the point in time when the operation to start inspection is performed, and measures the elapsed time.

[0074] (2.4) Work Station Next, the details of the work terminal 40 will be described with reference to FIG.

[0075] The work terminal 40 is a mobile terminal such as a smartphone carried by a worker who repairs, fixes, or maintains the display device 1. The work terminal 40 includes an operation unit 41, a display unit 42, a communication unit 43, a control unit 44, and a storage unit 45.

[0076] The operation unit 41 accepts operations performed by an operator or the like. The display unit 42 displays various images under the control of the control unit 44. For example, the display unit 42 is an image display device such as a liquid crystal display or an organic EL (Electro Luminescence) display. The operation unit 41 and the display unit 42 in this embodiment are a touch panel display in which the display unit 34 and the operation unit 37 are integrally configured.

[0077] The communication unit 43 is configured to be connectable to a network NT1 such as the Internet by an appropriate communication method such as wired communication or wireless communication. In addition, the communication unit 43 of the present embodiment can perform wireless communication with the communication unit 24 of the display device 1.

[0078] The control unit 44 mainly comprises, for example, a microcontroller having one or more processors and one or more memories. The microcontroller realizes the function of the control unit 44 by executing a program recorded in one or more memories with one or more processors. The program may be recorded in the memory in advance, or may be provided by recording it on a non-transitory recording medium such as a memory card, or may be provided through an electric communication line. In other words, the program is a program for causing one or more processors to function as the control unit 44.

[0079] The control unit 44 acquires repair data from the management device 30 based on the operation of the worker, and displays the repair data on the display unit 42. The control unit 44 also controls the communication unit 43 based on the operation of the worker, and causes the communication unit 43 to transmit completion data indicating that the repair of the display device 1 has been completed to the management device 30.

[0080] The storage unit 45 is configured with a device selected from a ROM (Read Only Memory), a RAM (Random Access Memory), an EEPROM (Electrically Erasable Programmable Read Only Memory), and the like.

[0081] (3) Display system operation Next, the operation of the display system 100 will be described with reference to FIGS.

[0082] (3.1) Display device operation First, the operation of the display device 1 will be described with reference to Fig. 8. Fig. 8 is a flowchart showing the operation of the display device 1.

[0083] When the display device 1 of this embodiment is in a powered-on state (activated state), it constantly generates the first captured image Im1 and the second captured image Im2, and constantly transmits the first captured image Im1 and the second captured image Im2 to the management device 30.

[0084] First, the display device 1 checks whether or not an instruction to start inspection of the secondary battery 3 transmitted from the management device 30 has been received (S1). If the start instruction has not been received (S1: No), the display device 1 waits until the start instruction is received. On the other hand, if the start instruction has been received (S1: Yes), the display device 1 switches the power supply source of the light source unit 6 from the power system PS1 to the secondary battery 3 (S2). More specifically, the control unit 2 controls the power supply switching unit 23, so that the power supply switching unit 23 switches the power supply source of the light source unit 6 from the power system PS1 to the secondary battery 3. In this embodiment, the secondary battery 3 supplies power to the light source unit 6 for about 20 minutes.

[0085] Next, the display device 1 checks whether or not an end instruction for the inspection transmitted from the management device 30 has been received (S3). If the end instruction has not been received (S3: No), the display device 1 waits until the end instruction is received. On the other hand, if the end instruction has been received (S3: Yes), the display device 1 switches the power supply source for the light source unit 6 from the secondary battery 3 to the power system PS1 (S4). More specifically, the control unit 2 controls the power supply switching unit 23, which causes the power supply switching unit 23 to switch the power supply source for the light source unit 6 from the secondary battery 3 to the power system PS1.

[0086] (3.2) Operation of the management device Next, the operation of the management device 30 will be described with reference to Fig. 9. Fig. 9 is a flowchart showing the operation of the management device 30.

[0087] The management device 30 of this embodiment constantly receives the first captured image Im1 and the second captured image Im2 transmitted from the display device 1 in an activated state. In addition, the management device 30 constantly displays the received first captured image Im1 and second captured image Im2 on the display unit 34.

[0088] First, the management device 30 checks whether an operation to start inspection of the secondary battery 3 (inspection start operation) has been input to the operation unit 37 (S11). If there is no inspection start operation (S11: No), the management device 30 checks whether the image of the confirmation area 20 included in the second captured image Im2 is in a lit state (S13). More specifically, the control unit 32 checks whether the image of the confirmation area 20 included in the second captured image Im2 is in a lit state by performing a pattern recognition process. If the image of the confirmation area 20 included in the second captured image Im2 is in a lit state (S13: Yes), the process returns to step S11.

[0089] On the other hand, if the image of the confirmation area 20 included in the second captured image Im2 is not in a lit state (S13: No), the management device 30 displays a defect display indicating that the light source unit 6 is defective on the display unit 34 (S14). Next, the management device 30 issues a defect alarm (defective notification) indicating that the light source unit 6 is defective on the notification unit 33 (S15). Since the notification unit 33 in this embodiment is a speaker, a voice notifying that the light source unit 6 is defective and an alarm sound are output. Then, the management device 30 performs a defect record to record data indicating that the light source unit 6 is defective (S16). More specifically, the management device 30 stores repair data including information on the facility in which the display device 1 is installed, information such as the position and management number of the display device 1 in the facility, and information that the light source unit 6 of the display device 1 is defective in the storage unit 35. Then, the process returns to step S11.

[0090] In the process of step S11, if an inspection start operation has been performed (S11: Yes), the management device 30 transmits a start instruction to start inspection of the secondary battery 3 to the display device 1 (S12). Here, the management device 30 starts measuring the elapsed time from the time when the inspection start operation is received.

[0091] Next, the management device 30 checks whether the image of the confirmation area 20 included in the second captured image Im2 is in a lit state (S17). If the image of the confirmation area 20 included in the second captured image Im2 is not in a lit state (S17: No), the management device 30 displays a defect display indicating that the secondary battery 3 is defective on the display unit 34 (S18). Next, the management device 30 issues a defect alarm (defective notification) indicating that the secondary battery 3 is defective using the notification unit 33 (S19). Since the notification unit 33 in this embodiment is a speaker, a voice notifying that the secondary battery 3 is defective and an alarm sound are output. Then, the management device 30 performs a defect record to record data indicating that the secondary battery 3 is defective (S20). More specifically, the management device 30 stores repair data in the storage unit 35, including information on the facility in which the display device 1 is installed, information such as the position and management number of the display device 1 within the facility, and information that the secondary battery 3 of the display device 1 is defective. Then, the management device 30 transmits an end instruction to end the inspection of the secondary battery 3 to the display device 1 (S23), and the process returns to step S11.

[0092] On the other hand, in the process of step S17, if the image of the confirmation area 20 included in the second captured image Im2 is in a lit state (S17: Yes), the management device 30 checks the elapsed time and confirms whether 20 minutes have passed (S21). If 20 minutes have not passed (S21: No), the process returns to step S17. On the other hand, if 20 minutes have passed (S21: Yes), the management device 30 records information indicating that the secondary battery 3 is normal (S22). Then, the management device 30 transmits an end instruction to the display device 1 to end the inspection of the secondary battery 3 (S23), and the process returns to step S11.

[0093] (3.3) Operation of the Work Terminal Next, the operation of the work terminal 40 will be described with reference to Fig. 10. Fig. 10 is a flow chart showing the operation of the work terminal 40.

[0094] First, the work terminal 40 checks whether the operation unit 41 has received an acquisition operation for acquiring repair data (S31). If there has been no acquisition operation (S31: No), the work terminal 40 waits until the acquisition operation is received. On the other hand, if there has been an acquisition operation (S31: Yes), the work terminal 40 acquires repair data from the management device 30 (S32). Then, the work terminal 40 displays the repair data on the display unit 42 (S33). The repair data includes information on the facility in which the display device 1 confirmed to be defective (abnormal) is installed, information such as the position and management number of the display device 1 in the facility, and information that the light source unit 6 or the secondary battery 3 of the display device 1 is defective. Therefore, a worker carrying the work terminal 40 can check the position of the display device 1 that needs to be repaired and the repair items by checking the repair data displayed on the display unit 42. Then, the worker repairs (repairs) the display device 1 with reference to the repair data. When the repair of the display device 1 is completed, the worker performs a completion operation on the work terminal 40.

[0095] Next, the work terminal 40 checks whether the operation unit 41 has received a completion operation by the worker (S34). If there has been no completion operation (S34: No), the work terminal 40 waits until the completion operation is received. On the other hand, if there has been a completion operation (S34: Yes), the work terminal 40 starts a process of transmitting completion data to the management device 30, and checks whether the completion data has been transmitted (S35). If the transmission of the completion data has not been completed (S35: No), the work terminal 40 waits until the transmission of the completion data is completed. On the other hand, if the transmission of the completion data has been completed (S35: Yes), the work terminal 40 displays a completion display on the display unit 42 indicating that the completion data has been transmitted (S36). Then, the work terminal 40 ends the process.

[0096] (4) Effects As described above, the display device 1 of the present embodiment includes the display panel 8, the light guide panel 7, the light source unit 6, the imaging unit 4, and the communication unit 24. The imaging unit 4 faces at least a part of the light guide panel 7, and generates a first captured image Im1 of the subject imaged in the first imaging region A3 and a second captured image Im2 of the subject imaged in the second imaging region A4. The communication unit 24 transmits the first captured image Im1 and the second captured image Im2 to the management device 30. The imaging unit 4 captures an image of the light guide panel 7 side along the thickness direction (front-rear direction) of the part of the light guide panel 7 facing the imaging unit 4. At least one of the display panel 8 and the light guide panel 7 has a confirmation area 20 that is an area imaged in the second imaging region A4. The management device 30 or an operator of the management device 30 can easily check whether the display device 1 is operating normally by checking whether the image in the confirmation area 20 is turned on. This can reduce the burden of inspecting the display device 1.

[0097] The display device 1 of this embodiment also includes a secondary battery 3. The secondary battery 3 supplies power to the light source unit 6 when the power supply system PS1 fails. The display device 1 is an emergency display device that includes the secondary battery 3. This can reduce the burden of inspecting the emergency display device 1, which requires periodic inspection.

[0098] Moreover, the display panel 8 of this embodiment displays a display pattern 80 that is information related to evacuation routes. That is, the display device 1 is an evacuation guide light. This reduces the burden of inspecting the display device 1, which is an evacuation guide light that requires regular inspection.

[0099] Furthermore, since the confirmation region 20 in this embodiment is green (chromatic color) and has translucency, it is easy to confirm whether the image of the confirmation region 20 included in the second captured image Im2 is in a lit state or not.

[0100] Furthermore, the light guide panel 7 of this embodiment has a passing region 71. The passing region 71 overlaps with the imaging unit 4 in the thickness direction (front-rear direction) of the light guide panel 7. The imaging unit 4 captures an image of the outside (front) of the light guide panel 7 through the passing region 71. Since the light guide panel 7 has the passing region 71, the imaging unit 4 can capture an image of the front of the light guide panel 7.

[0101] In the present embodiment, the passing area 71 is a through hole. Since the passing area 71 is a through hole, the imaging unit 4 can clearly capture an image of the area in front of the light guide panel 7 through the passing area 71.

[0102] The imaging unit 4 of this embodiment includes a lens 17, a first imaging element 181, and a second imaging element 182. The lens 17 converges light from the outside onto an imaging surface A0 to form an image. The first imaging element 181 includes a first imaging area A3 that is an area for capturing an image of a subject imaged in a first area A1 that is the center of the imaging surface A0. The second imaging element 182 includes a second imaging area A4 that is an area for capturing an image of a confirmation area 20 imaged in a second area A2 outside the first area A1. By capturing an image of the confirmation area 20 in the second imaging area A4 that is outside the first imaging area A3, it becomes unnecessary to capture an image of the confirmation area 20 in the first imaging area A3. This allows the first imaging element 181 to be an imaging element that captures only an evacuation route in front of the display device 1, for example.

[0103] The display device 1 of the present embodiment further includes a housing 9. The housing 9 is provided with the display unit 5 (the display panel 8 and the light guide panel 7). The display panel 8 has a passing area 81, and the light guide panel 7 has a passing area 71. The passing areas 71, 81 overlap with the imaging unit 4 in the thickness direction (front-rear direction) of the light guide panel 7. The confirmation area 20 is provided on the periphery of the passing area 81 of the display panel 8 and overlaps with the passing area 71 of the light guide panel 7. The imaging unit 4 is accommodated in the accommodation space Sp1 between the housing 9 and the light guide panel 7, and captures an image of the front of the display panel 8 through the passing area 71 of the light guide panel 7 and the passing area 81 of the display panel 8. This allows the imaging unit 4 accommodated in the accommodation space Sp1 between the housing 9 and the light guide panel 7 to capture an image of the confirmation area 20 and the front of the display panel 8.

[0104] Moreover, the display unit 5 of this embodiment has two sets of the passing area 71, the passing area 81, and the confirmation area 20. As a result, depending on the installation location of the display device 1 and other factors, the imaging unit 4 can be disposed at a position corresponding to one of the two sets where the imaging unit 4 can easily capture the first captured image Im1 and the second captured image Im2.

[0105] The display system 100 of the present embodiment includes the display device 1 and a management device 30. The management device 30 includes a display unit 34 and a control unit 32. The display unit 34 displays the first captured image Im1 and the second captured image Im2 transmitted from the display device 1. The control unit 32 stores the first captured image Im1 and the second captured image Im2 transmitted from the display device 1 in a storage unit 35. An operator of the management device 30 or the like can easily check whether the display device 1 is operating normally by checking whether the image of the confirmation area 20 displayed on the display unit 34 is turned on. This can reduce the burden of inspecting the display device 1.

[0106] The management device 30 of this embodiment also includes a notification unit 33. When the image of the confirmation region 20 included in the second captured image Im2 indicates that the light source unit 6 of the display device 1 is not lit normally, the notification unit 33 notifies that the light source unit 6 is not lit normally. An operator of the management device 30 or the like can easily know that the display device 1 is not operating normally.

[0107] (5) Variations The first embodiment is merely one of various embodiments of the present disclosure. The first embodiment can be modified in various ways depending on the design and the like as long as the object of the present disclosure can be achieved.

[0108] Furthermore, functions equivalent to those of the display system 100 according to the first embodiment may be embodied in a display method, a (computer) program, or a non-transitory recording medium having a program recorded thereon. The display method according to one aspect includes an imaging step and a transmission step. In the imaging step, at least a part of at least one of the light guide panel 7 and the display panel 8 is imaged by the imaging unit 4 along the thickness direction (front-rear direction) of the light guide panel 7 to generate captured images (first captured image Im1; second captured image Im2). In the transmission step, the captured images generated in the imaging step are transmitted to the management device 30. The program according to one aspect is a program for causing one or more processors to execute the above estimation method.

[0109] The display system 100 in the present disclosure includes, for example, a computer system. The computer system is mainly composed of a processor and a memory as hardware. The processor executes a program recorded in the memory of the computer system, thereby realizing the function of the display system 100 in the present disclosure. The program may be pre-recorded in the memory of the computer system, may be provided through an electric communication line, or may be provided by being recorded in a non-transitory recording medium such as a memory card, an optical disk, or a hard disk drive that can be read by the computer system. The processor of the computer system is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or a large-scale integrated circuit (LSI). The integrated circuits such as IC or LSI referred to here are called by different names depending on the degree of integration, and include integrated circuits called system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). Furthermore, a field-programmable gate array (FPGA) that is programmed after the manufacture of the LSI, or a logic device that can reconfigure the connection relationship inside the LSI or reconfigure the circuit partition inside the LSI, can also be adopted as a processor. The electronic circuits may be integrated in one chip or distributed among multiple chips. The chips may be integrated in one device or distributed among multiple devices. The computer system referred to here includes a microcontroller having one or more processors and one or more memories. Thus, the microcontroller is also composed of one or more electronic circuits including a semiconductor integrated circuit or a large-scale integrated circuit.

[0110] Below, we will list some modified examples of the embodiment 1. The modified examples explained below can be applied in appropriate combinations.

[0111] For example, at least a part of the functions of the display system 100 (management device 30) may be realized by, for example, cloud computing (cloud computing).

[0112] The display pattern 80 is not limited to the display pattern shown in FIG. 1, but may be, for example, an arrow-shaped symbol indicating the evacuation direction or the words "emergency exit EXIT" indicating an evacuation exit.

[0113] At least one of the passing region 71 and the passing region 81 may be transparent. When at least one of the passing region 71 and the passing region 81 is transparent, the imaging unit 4 can clearly image an area in front of the light guide panel 7 through the passing region 71.

[0114] In embodiment 1, all four second captured images Im2 include an image of the confirmation area 20, but when there are multiple second captured images Im2 due to multiple second imaging elements 182, it is sufficient that at least one of the multiple second captured images Im2 includes an image of the confirmation area 20.

[0115] Also, the first imaging element 181 and the first imaging region A3 may be larger than the first region A1. That is, the first imaging region A3 of the first imaging element 181 may capture an image of the subject formed in the first region A1 (first captured image Im1) and an image of the confirmation region 20 formed in the second region A2 (second captured image Im2). This allows one imaging element (first imaging element 181) to capture an image of the subject formed in the first region A1 and an image of the confirmation region 20 formed in the second region A2. When the first imaging element 181 captures the image of the confirmation region 20 formed in the second region A2, it is preferable to enlarge the size of the first imaging element 181 to a size that includes the four second imaging elements 182 shown in FIG. 5. In this case, the four second imaging elements 182 are not mounted on the board 18.

[0116] The confirmation area 20 may be chromatic and translucent, for example, blue or red.

[0117] The first captured image Im1 may be used for crime prevention purposes. In this case, for example, the control unit 32 performs a pattern recognition process on the first captured image Im1 to check whether the first captured image Im1 contains a face image that does not match the face image of a person registered in advance. If the first captured image Im1 contains a face image that does not match the face image of a person registered in advance, the control unit 32 causes the notification unit 33 to notify that a suspicious person has been photographed.

[0118] The first captured image Im1 may also be used to confirm that no person is in a position to escape in an emergency such as a disaster. In this case, for example, the control unit 32 performs a pattern recognition process on the first captured image Im1 to confirm whether or not a face image of a person registered in advance is included in the first captured image Im1. If a face image of a person registered in advance is included in the first captured image Im1, for example, the control unit 32 causes the display unit 34 to display that a person corresponding to the face image included in the first captured image Im1 has passed through the evacuation route. The control unit 32 may also cause the display unit 34 to display information about a person whose face image has not been confirmed to be included in the first captured image Im1 as information about a person who may be in a position to escape in an emergency.

[0119] (Embodiment 2) (1) Overview As shown in FIG. 11, the display device 1a of this embodiment differs from the display device 1 of the first embodiment in that at least a part of the housing 50 is embedded in the ceiling 200 (construction material). Hereinafter, the same components as those of the first embodiment will be denoted by the same reference numerals and will not be described as necessary. In the following description, the direction in which the display panel 8a (see FIG. 15) and the second light guide panel 7b (see FIG. 15) are arranged is defined as the front-rear direction (second direction), the display panel 8a side as viewed from the second light guide panel 7b is the front, and the second light guide panel 7b side as viewed from the display panel 8a is the rear. In addition, the direction in which the light source unit 6 (see FIG. 15) and the second light guide panel 7b are arranged is defined as the up-down direction (first direction), the light source unit 6 side as viewed from the second light guide panel 7b is the up, and the second light guide panel 7b side as viewed from the light source unit 6 is the down. In addition, the direction perpendicular to the front-rear direction and the up-down direction is defined as the left-right direction.

[0120] (2)Details As shown in FIG. 11, a display device 1a of this embodiment includes a display unit 5a, a housing 50, and a mounting frame 51.

[0121] At least a portion of the housing 50 is embedded in the ceiling 200. The housing 50 has a box shape with an opening at the bottom, and houses the control unit 2, the secondary battery 3, the imaging unit 4, and the light source unit 6.

[0122] The mounting frame 51 is plate-shaped. The mounting frame 51 is disposed below the housing 50 and the ceiling 200 so as to face the housing 50 and the ceiling 200. The mounting frame 51 is disposed so as to cover an opening on the lower surface of the housing 50. The mounting frame 51 is attached to the ceiling 200, and the mounting frame 51 and the housing 50 are fixed together, whereby the housing 50 and the display unit 5a are fixed to the ceiling 200.

[0123] Fig. 12 is a plan view of the display device 1a as viewed from below. As shown in Fig. 12, the mounting frame 51 has an opening 52 and a plurality of (four in the example of Fig. 12) passing areas 53. In the following description, when there is no need to distinguish between the four passing areas 53, each of the four passing areas 53 will be referred to as a "passing area 53."

[0124] 12, the opening 52 is a rectangular opening whose longitudinal direction is along the left-right direction in a plan view from the top-bottom direction. The opening 52 is an opening that penetrates the display unit 5a.

[0125] In this embodiment, the four passing areas 53 are circular through holes. The four passing areas 53 are provided outside the four corners of the opening 52. In this embodiment, the imaging unit 4 is disposed above the passing area 53 provided on the front left side among the four passing areas 53 (see FIG. 14).

[0126] Fig. 15 is a cross-sectional view taken along line CC in Fig. 11. As shown in Fig. 15, a display unit 5a of this embodiment includes a display panel 8a and a second light guide panel 7b.

[0127] The display panel 8a is plate-shaped, and the thickness direction of the display panel 8a is along the front-rear direction. The display panel 8a penetrates an opening 52 (see FIG. 14) of the mounting frame 51 and protrudes downward (along the first direction). The display panel 8a faces the second light guide panel 7b along the front-rear direction, and is disposed in front of the second light guide panel 7b.

[0128] The second light guide panel 7b is plate-shaped, and the thickness direction of the second light guide panel 7b is along the front-rear direction. The second light guide panel 7b penetrates the opening 52 of the mounting frame 51 and protrudes downward. The second light guide panel 7b faces the display panel 8a along the front-rear direction (second direction) and is disposed behind the display panel 8a.

[0129] The display device 1a of this embodiment also includes a first light guide panel 7a. The first light guide panel 7a is a plate-like panel with a thickness direction (first direction) of the first light guide panel 7a aligned along the vertical direction. The first light guide panel 7a faces the imaging unit 4 (see FIG. 16) and the mounting frame 51 along the vertical direction (first direction). At least a portion of the first light guide panel 7a is disposed below the light source unit 6. The first light guide panel 7a of this embodiment guides light emitted by the light source unit 6 to below the imaging unit 4.

[0130] 16 is a schematic diagram showing a main part of the first light guide panel 7a. As shown in FIG. 16, the first light guide panel 7a of this embodiment has a passing area 71a and a confirmation area 20.

[0131] The passing area 71a is a circular through-hole when viewed from above in the vertical direction (first direction). As shown in Fig. 17, the passing area 71a overlaps with the imaging unit 4 in the vertical direction. In this embodiment, the passing area 71a has a smaller diameter than the passing area 53 of the mounting frame 51. In this embodiment, the center of the passing area 71a, the center of the lens 17 (see Fig. 5), and the center of the passing area 53 overlap when viewed from the vertical direction (first direction).

[0132] The confirmation area 20 is provided on the periphery of the passing area 71a, and has a circular ring shape (see FIG. 16). The confirmation area 20 faces the passing area 53 of the attachment frame 51.

[0133] 13, the imaging unit 4 of this embodiment is provided in a housing 50. The imaging unit 4 is embedded in a ceiling 200. As shown in FIG. 17, the imaging unit 4 of this embodiment captures an image of the area below (outside) the mounting frame 51 through the passing area 71a and the passing area 53.

[0134] In addition, in this embodiment, by changing the orientation of the imaging unit 4, the imaging range of the imaging unit 4 changes to, for example, imaging ranges 21a, 21b, and 21c. In this embodiment, each of the imaging ranges 21a, 21b, and 21c includes at least a part of the confirmation area 20. More specifically, an image of at least a part of the confirmation area 20 is formed in the second imaging area A4 of the imaging unit 4. This allows the imaging unit 4 to always capture an image of the confirmation area 20.

[0135] (3) Effects As described above, the display device 1a of the present embodiment includes the first light guide panel 7a, the second light guide panel 7b, the display panel 8a, the housing 50, and the mounting frame 51. At least a portion of the housing 50 is embedded in the ceiling 200. The mounting frame 51 is configured to mount the housing 50 to the ceiling 200 and is plate-shaped. The first light guide panel 7a faces the imaging unit 4 and the mounting frame 51 along the first direction (vertical direction) which is the thickness direction of the first light guide panel 7a. The first light guide panel 7a has a passing area 71a. The passing area 71a overlaps with the imaging unit 4 in the vertical direction. The second light guide panel 7b is disposed alongside the display panel 8 along the second direction (front-rear direction) which intersects with the first direction. The mounting frame 51 has an opening 52 and a passing area 53. The passing area 53 overlaps with the imaging unit 4 when viewed from the vertical direction. The display panel 8 and the second light guide panel 7b pass through the opening 52 of the mounting frame 51 and protrude downward from the ceiling 200. The confirmation area 20 is provided in a portion of the first light guide panel 7a that faces the passage area 53 of the mounting frame 51. The imaging unit 4 is provided in the housing 50, and captures an image of the area below (outside) the mounting frame 51 through the passage area 71a and the passage area 53. The imaging unit 4, which is provided in the housing 50 at least a portion of which is embedded in the ceiling 200, can capture an image of the confirmation area 20 and the area below the mounting frame 51.

[0136] (4) Variations The second embodiment is merely one of various embodiments of the present disclosure. The second embodiment can be modified in various ways depending on the design and the like as long as the object of the present disclosure can be achieved.

[0137] At least one of the passage area 53 of the mounting frame 51 and the passage area 71a of the first light guide panel 7a may be transparent.

[0138] The various configurations described in the second embodiment can be applied in appropriate combination with the first embodiment and the modified examples of the first embodiment.

[0139] (summary) As described above, the display device (1; 1a) according to the first embodiment includes a display panel (8), a light guide panel (7), a light source unit (6), an imaging unit (4), and a communication unit (24). The light guide panel (7) guides light. The light source unit (6) supplies light to the display panel (8) through the light guide panel (7). The imaging unit (4) faces at least a part of the light guide panel (7) and generates captured images (first captured image Im1; second captured image Im2) of a subject formed in an imaging region (first imaging region A3; second imaging region A4). The communication unit (24) transmits the captured images to the management device (30). The imaging unit (4) captures an image of the light guide panel (7) side along the thickness direction of a portion of the light guide panel (7) facing the imaging unit (4). At least one of the display panel (8) and the light guide panel (7) has a confirmation area (20) which is an area where an image is formed within the imaging area.

[0140] According to this aspect, the imaging unit (4) generates captured images (first captured image Im1; second captured image Im2) in which the confirmation area (20) is captured, and transmits the captured images to the management device (30). The management device (30) or an operator of the management device (30) can easily check whether the display device (1; 1a) is operating normally by checking whether the image of the confirmation area (20) is turned on. This can reduce the burden of inspecting the display device (1; 1a).

[0141] The display device (1; 1a) according to the second embodiment is the same as the display device (1) according to the first embodiment, and further includes an emergency power supply (secondary battery 3). The emergency power supply supplies power to the light source unit (6) when the normal power supply (system power supply PS1) fails.

[0142] According to this embodiment, the display device (1; 1a) is an emergency display device equipped with an emergency power source (secondary battery 3). It is possible to reduce the burden of inspecting the emergency display device (1; 1a), which requires regular inspection.

[0143] In the display device (1; 1a) according to the third embodiment, in the first or second embodiment, the display panel (8) displays information (display pattern 80) relating to evacuation routes.

[0144] According to this aspect, the display device (1; 1a) is an evacuation guide light. It is possible to reduce the burden of inspecting the display device (1; 1a) that is an evacuation guide light, which requires regular inspection.

[0145] In the display device (1; 1a) according to the fourth aspect, in any one of the first to third aspects, the confirmation region (20) is chromatic and has light-transmitting properties.

[0146] According to this embodiment, it is easy to confirm whether the image of the confirmation region (20) included in the captured images (first captured image Im1; second captured image Im2) is in a lit state or not.

[0147] In a display device (1; 1a) according to a fifth aspect, in any one of the first to fourth aspects, the light guide panel (7) has a passing region (71). The passing region (71) overlaps with the imaging section (4) in the thickness direction. The imaging section (4) captures an image of the outside of the light guide panel (7) through the passing region (71).

[0148] According to this embodiment, the imaging section (4) can capture an image of the outside of the light guide panel (7) through the passing area (71).

[0149] In the display device (1; 1a) according to the sixth aspect, in the fifth aspect, the passing region (71) is a through hole.

[0150] According to this embodiment, the imaging section (4) can clearly capture an image of the outside of the light guide panel (7) through the passage area (71) which is a through hole.

[0151] In the display device (1; 1a) according to the seventh embodiment, in the fifth embodiment, the passing region (71) is transparent.

[0152] According to this embodiment, the imaging section (4) can clearly capture an image of the outside of the light guide panel (7) through the transparent passing area (71).

[0153] In a display device (1;1a) according to an eighth aspect, in any one of the first to seventh aspects, the imaging section (4) has a lens (17) and an imaging element (first imaging element 181). The lens (17) converges light from the outside onto an imaging surface (A0) to form an image. The imaging element has a first imaging region (A3) and a second imaging region (A4). The first imaging region (A3) is a region that captures an image of a subject that is formed in a first region (A1) that is the center of the imaging surface (A0). The second imaging region (A4) is a region that captures an image of a confirmation region (20) that is formed in a second region (A2) outside the first region (A1).

[0154] According to this embodiment, an image of the subject formed in the first area (A1) and an image of the confirmation area (20) formed in the second area (A2) can be captured using a single imaging element (first imaging element 181).

[0155] In a display device (1;1a) according to a ninth aspect, in any one of the first to seventh aspects, the imaging section (4) has a lens (17), a first imaging element (181), and a second imaging element (182). The lens (17) converges light from the outside onto an imaging surface (A0) to form an image. The first imaging element (181) has a first imaging region (A3) which is a region for capturing an image of a subject formed in a first region (A1) which is the center of the imaging surface (A0). The second imaging element (182) has a second imaging region (A4) which is a region for capturing an image of a confirmation region (20) formed in a second region (A2) outside the first region (A1).

[0156] According to this embodiment, by capturing an image of the confirmation area (20) in the second imaging area (A4) that is outside the first imaging area (A3), it becomes unnecessary to capture an image of the confirmation area (20) in the first imaging area (A3) of the first imaging element (181). This allows the first imaging element (181) to be an imaging element that captures, for example, only an evacuation route in front of the display device (1).

[0157] The display device (1) according to a tenth aspect is the display device according to any one of the first to ninth aspects, further including a housing (9). A display panel (8) and a light guide panel (7) are attached to the housing (9). The display panel (8) and the light guide panel (7) have passing areas (71, 81). The passing areas (71, 81) overlap with the imaging unit (4) in the thickness direction. The confirmation area (20) is provided on the periphery of the passing area (81) of the display panel (8) and overlaps with the passing area (71) of the light guide panel (7). The imaging unit (4) is accommodated in the accommodation space (Sp1) between the housing (9) and the light guide panel (7), and captures an image of the outside of the display panel (8) via the passing area (71) of the light guide panel (7) and the passing area (81) of the display panel (8).

[0158] According to this embodiment, the imaging unit (4) housed in the storage space (Sp1) between the housing (9) and the light guide panel (7) can capture images of the confirmation area (20) and the outside of the display panel (8).

[0159] A display device (1a) according to an eleventh aspect is in any one of the first to ninth aspects, and includes a housing (50), a mounting frame (51), and a first light guide panel (7a) and a second light guide panel (7b) as the light guide panel (7). At least a portion of the housing (50) is embedded in a construction material (ceiling 200). The mounting frame (51) is configured to mount the housing (50) to the construction material and is plate-shaped. The first light guide panel (7a) faces the imaging unit (4) and the mounting frame (51) along a first direction that is a thickness direction of the first light guide panel (7a). The first light guide panel (7a) has a passing area (71a). The passing area (71a) overlaps with the imaging unit (4) in the first direction. The second light guide panel (7b) is arranged alongside the display panel (8) along a second direction that intersects with the first direction. The mounting frame (51) has an opening (52) and a passage area (53). The passage area (53) overlaps with the imaging unit (4) in the first direction. The display panel (8) and the second light guide panel (7b) pass through the opening (52) of the mounting frame (51) and protrude from the building material (ceiling 200) along the first direction. The confirmation area (20) is provided in a portion of the first light guide panel (7a) that faces the passage area (53) of the mounting frame (51). The imaging unit (4) is provided in the housing (50) and captures an image of the outside of the mounting frame (51) via the passage area (71a) of the first light guide panel (7a) and the passage area (53) of the mounting frame (51).

[0160] According to this embodiment, the imaging unit (4) provided in the housing (50) at least a portion of which is embedded in the construction material (ceiling 200) can capture images of the confirmation area (20) and the outside of the mounting frame (51).

[0161] The configurations other than those of the first aspect are not essential for the display device (1; 1a) and may be omitted as appropriate.

[0162] A display system according to a twelfth aspect includes a display device (1; 1a) according to any one of the first to eleventh aspects, and a management device (30). The management device (30) has a display unit (34) and a control unit (32). The display unit (34) displays the captured images (first captured image Im1; second captured image Im2) transmitted from the display device (1; 1a). The control unit (32) stores the captured images transmitted from the display device (1; 1a) in a storage unit (35).

[0163] The operator of the management device (30) can easily check whether the display device (1; 1a) is operating normally by checking whether the image in the confirmation area (20) displayed on the display unit (34) is turned on or not, thereby reducing the burden of inspecting the display device (1; 1a).

[0164] The display system according to the thirteenth aspect is the same as the display system according to the twelfth aspect, and further includes a notification unit (33). When an image of the confirmation region (20) included in the captured image (first captured image Im1; second captured image Im2) indicates that the light source unit (6) of the display device (1; 1a) is not lighting up normally, the notification unit (33) notifies that the light source unit (6) is not lighting up normally.

[0165] According to this embodiment, for example, an operator of the management device (30) can easily know that the display device (1; 1a) is not operating normally. [Explanation of symbols]

[0166] 1 Display device 1a Display device 3 Secondary battery (emergency power supply) 4. Imaging unit 6 Light source section 7 Light guide panel 7a First light guide panel 7b Second light guide panel 8 Display Panel 9. Cabinet 17 Lenses 20 Confirmation area 24 Communications Department 30 Management device 50 Case 51 Mounting frame 52 Opening 53 Passage area 71 Passage area 80 Display Pattern (Information) 81 Passage area 181 1st imaging element (imaging element) 182 Second imaging element 200 Ceiling (construction materials) A0 image plane A1 1st area A2 2nd area A3 First imaging area (imaging area) A4 Second imaging area (imaging area) Im1 First image (image) Im2 Second image (image) PS1 Grid power supply (common power supply) Sp1 Containment Space

Claims

[Claim 1] A display panel; A light guide panel that guides light; a light source unit that supplies light to the display panel through the light guide panel; an imaging section that faces at least a part of the light guide panel and generates an image of a subject that is imaged in an imaging area; a communication unit that transmits the captured image to a management device; Equipped with the imaging unit captures an image of the light guide panel side along a thickness direction of a portion of the light guide panel facing the imaging unit, At least one of the display panel and the light guide panel has a confirmation area which is an area where an image is formed within the imaging area. Display device.

Images