JP2008299263A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device attaining cost reduction by reducing a manufacturing cost, excelling in visibility of a warning area, uniforming surface illuminating luminance and easily coping with a layout change. <P>SOLUTION: In the display device 20, a display part 17 includes a transparent display sheet 2 formed with a display graphic form; a shading sheet 8 shading a non-illuminating area of a partitioned area formed on the display sheet 2; and a window plate 1 and a transparent pressing plate 3 holding the display sheet 2 replaceably. An illuminating part 18 comprises a light guide panel 5 formed cut out according to the warning area and carrying out surface illumination of light irradiated from the side face side, toward the front side of the display part 17, and LEDs 11 for surface illumination movably held to the side face of the light guide panel 5. Reflecting tapes 6 and reflecting films 7 serving as reflecting members are formed in an outer peripheral area, excluding the illuminating surface, of the light guide panel 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display device, and more particularly to a display device that graphically displays a location where a fire or the like has occurred and a position of a terminal device such as a sensor or a fire door.

  Generally, in a multi-layered building or the like, a composite receiver is installed in a central control room. This composite receiver has a warning alert function in case of fire and a control function of fire prevention equipment, and a group of terminal devices such as a plurality of detectors and fire doors and signal lines arranged in the warning control area of all levels. Connected with. This composite receiver immediately responds to the sensing operation of the sensor, notifies the occurrence of a fire within the entire warning control area, and controls the terminal device such as a fire door to operate so that the loss of human life or It is designed to prevent major disasters from occurring. There is a display device as means for visually confirming a situation such as the occurrence of a fire based on the sensing (detection) data input to the composite receiver.

  Conventionally, as this type of display device, as shown in FIGS. 7 to 9, a warning control area is displayed as a map or a schematic diagram, and the map or schematic diagram is divided into districts, rooms, corridors, etc. For example, an image that displays a graphic image of the situation is known for each section area (hereinafter referred to as a warning area). 7 is a front view of a conventional display device 100, FIG. 8 is an exploded perspective view of the display device 100, and FIG.

  The display device 100 shown in FIG. 7 is visually observed from the front side, for example, in each of the warning areas of the partition diagram (schematic diagram) 110 showing the positional relationship between an office room, a meeting room, etc. The display figure is lit up in accordance with whether or not a fire condition has occurred.

  As shown in FIG. 8, the display device 100 includes, in order from the front side, two transparent plates 101 and 103, a light shielding partition 104, and a lamp socket 107 including a lamp 106 disposed in the light shielding partition 104. And a lamp socket holding plate 105 on which the lamp socket 107 is held. Further, the wiring 108 connected to the lamp socket 107 is drawn out of the apparatus from the back side of the lamp socket holding plate 105.

  As shown in FIGS. 7 to 9, on the back surface of the transparent plate 101, a partition diagram 110 in which the interior of the building is partitioned in a plane is drawn from the back surface. In the partition diagram 110, circle numbers 109 and characters 111 are displayed. These round numerals 109 and letters 111 are cut along the contours, and paints of different colors are applied to the carved cutting grooves. In addition, a translucent paint 102 is applied to the plane portion of the partition diagram 110, and a warning area within a predetermined range is displayed in different colors. The transparent plate 101 is formed of an acrylic resin plate having a thickness that can be cut. The transparent plate 101 is cut at a predetermined location.

  On the back side of the transparent plate 103, a light shielding partition 104 is attached so as to correspond to each warning area. The light shielding partition 104 is cut and processed into a plate having a length corresponding to the straight line of the partition line in the partition diagram 110 and bonded to the back side of the transparent plate 101 one by one so as to form a box frame. . The light of the lamp 106 attached to the lamp socket holding plate 105 via the lamp socket 107 illuminates the inside of the light shielding partition 104, and the light does not leak to other areas.

  In such a conventional display device 100, when a terminal device arranged in an actual warning area operates, the lamp 106 arranged in the light shielding partition 104 in the corresponding warning area is turned on. Then, the light of the lit warning area lamp 106 is irradiated from the back surface of the transparent plate 101 corresponding to the warning area through the transparent plate 103. In other alert areas, when the terminal device operates, the same lighting display is performed. As a result, it is possible to visually determine that the alert area that is brightly illuminated is the location where the alarm is transmitted.

As another conventional technique, there is known a device in which a lead leg of a light-emitting diode is inserted into a mounting position changing means composed of a foam member so as to be transferable (see Patent Document 1). Also, there is known a device that has been improved to compensate for the deviation between the projected image of the light source and the projection target in the above-described conventional display device (see Patent Document 2). There is also known an apparatus configured to support a light-shielding sheet having a light-transmitting part simulating a pattern on the front side of a light-shielding cylinder in which a light source is disposed (see Patent Document 3).
Japanese Patent No. 2920757 Japanese Patent No. 3030774 JP 2005-189442 A

  However, the conventional display device 100 shown in FIGS. 7 to 9 has problems as described below (excluding problems solved in the above-mentioned patent document).

(A) Since the light-shielding partition 104 is cut and processed into the same shape as that of the partition diagram 110 and bonded to the back surface of the transparent plate 103 one by one, the number of work steps is increased and the cost is further increased.

(B) When the warning area divided by the light-shielding partition 104 is wide, the light from the lamp 106 becomes spot-like, so it is difficult to determine which warning area the fire has occurred, and visibility is deteriorated.

(C) When the display position is changed by changing the layout, not only the transparent plate 101 but also the light shielding partition 104 and the lamp socket holding plate 105 need to be modified, so that the modification work accompanying the layout change becomes large.

(D) When the outer shape of the warning area is uneven or there is a non-illuminated area inside, a place where the light from the lamp 106 does not spread occurs, and the surface illumination luminance on the display surface is not uniform.

  As described above, in the conventional display device 100, the manufacturing cost is increased and the cost is increased. In addition, the visibility of the warning area cannot be improved and the surface illumination brightness cannot be uniformed, and the layout can be changed. There was a problem of becoming a major scale.

  The object of the present invention is to reduce the manufacturing cost, to reduce the cost, to improve the visibility of the warning area, to make the surface illumination brightness uniform, and to easily cope with the layout change. To provide an apparatus.

  In order to achieve the above object, the invention according to claim 1 irradiates the light of the light source from the back side of the display unit on which the display graphic including the plurality of divided areas and the character information is formed, The display device includes an illumination unit that projects and displays the display graphic on the front side of the display unit, and the display unit is formed on the transparent display sheet on which the display graphic is formed, and the display sheet. A non-illuminated area of the partitioned area, and a sheet holding means for holding the display sheet and the light-shielding sheet in a replaceable manner, and the illuminating unit is cut out and shaped into a shape approximating the partitioned area, A light guide member that illuminates light emitted from the side surface toward the front side of the display unit, and a light source that is movably held on the side surface of the light guide member in accordance with a partition area of the display graphic An illumination surface of the light guide member The outer peripheral zone except, the gist that the reflecting member for reflecting light to the light guide member side is provided.

  According to a second aspect of the present invention, in the first aspect, the light guide member is formed with a light shielding hole penetrating in a thickness direction, a light shielding member is formed on an inner wall surface of the light shielding hole, and a light source is the light shielding member. The gist is that it can be transferred inside the hole.

  The invention according to claim 3 is summarized in that, in claim 2, the light shielding member includes a reflection surface that reflects light, and the reflection surface is formed to face the light guide member.

  According to the first aspect of the present invention, the light guide member serving as the surface illuminating means can be cut out and formed into a desired shape, and can be manufactured by forming the reflection member in the outer peripheral area. Compared to cutting and processing the light-shielding partition into the same shape as the partition diagram and bonding them one by one to the back surface of the transparent plate, the manufacturing becomes extremely easy. Therefore, the number of work steps can be reduced as compared with the conventional technique, and the manufacturing cost can be suppressed and the cost can be reduced.

  In addition, since the light from the light source is illuminated by the light guide member, even if the area of the warning area is large, the light from the light source does not become a spot, making it easy to determine which warning area the fire has occurred. Display with excellent characteristics can be performed.

  Furthermore, even when the display position is changed due to the layout change, not only can the display sheet and the light guide member be easily manufactured, but there is no need to modify the member that supports the light source, making it easy to change the layout. It can correspond to.

 In addition, since the light guide member is cut out and formed into a shape that approximates the partition area, the irradiation light from the light source spreads to every corner of the light guide member without being blocked by the non-illuminated region of the display graphic. A part of the light illuminated from the light guide member is shielded by the light shielding sheet provided on the back side of the display sheet, and the remaining light is projected and displayed on the front side of the display unit. As described above, the light projected and displayed on the display unit is obtained by shielding a part of the uniformly surface-illuminated light in a planar manner, so that the surface illumination luminance can be made uniform.

  According to the second aspect of the present invention, since the light guide member is formed with the light shielding hole penetrating in the thickness direction and the light source is movably held therein, the light from the light source is guided by the light guide member. Irradiate the display unit without passing through. For this reason, it is possible to perform spot display of operating states of fire doors, shutters, and hanging walls, which are control terminal devices arranged in the warning area. And when such spot display and warning area surface illumination are used in combination, it is possible to easily determine the location of the fire occurrence and to quickly check the operating state of the fire door, etc. This makes it possible to respond more quickly in the event of a fire. Further, since the light source for spot display as described above is held inside the light blocking hole, the depth dimension of the apparatus can be shortened. Furthermore, since the spot display light source is movably held inside the light blocking hole, it is possible to easily cope with a layout change. Further, since the light shielding member is provided on the inner wall surface of the light shielding hole, the light irradiated to the light guide member does not leak into the light shielding hole, so that there is no partial shortage of light quantity and uniform. Surface illumination can be performed.

  According to the invention of claim 3, since the light shielding member having the reflection surface for reflecting the light is used and the reflection surface is directed to the light guide member side, the light irradiated to the light guide member from the light source Of these, the light that reaches the vicinity of the light shielding hole is reflected toward the inside of the light guide member by the light shielding member formed on the inner wall surface of the light shielding hole, and when the light shielding member is not formed in this portion. In comparison with this, light loss is reduced, and more uniform surface illumination can be performed.

  Hereinafter, embodiments of a display device according to the present invention will be described. Note that the drawings shown in the present embodiment are schematic, and the ratio of dimensions of each member is different from the actual one.

[Explanation of projected image]
First, before describing the configuration of the display device according to the present embodiment, an image projected and displayed on the display unit will be described. FIG. 2 is a front view of the display device. As shown in FIG. 2, a partition diagram 22 in which a warning area 21 inside the building is partitioned in a plane is displayed on the display unit front surface of the display device 20. The partition diagram 22 is a display graphic including a warning area 21 and character information described later.

  In each warning area 21, as character information, a circle number 23 indicating a fire detector (warning terminal device), a character 24 indicating a fire door (control terminal device), the name of the area, its use and fire prevention A character string 25 indicating a place name such as equipment is displayed. In addition to the fire alarm (automatic fire alarm detector), the terminal device for warning includes a detector for smoke prevention equipment. In addition to fire doors, terminal equipment for control includes smoke prevention equipment such as shutters and hanging walls.

  Each warning area 21 is provided with a surface illuminating unit 26 that uniformly illuminates light of a light emitting diode described later. Further, a spot display unit 27 is provided in the alert area 21 as necessary. In FIG. 2, the fire door D <b> 1 is used as the spot display unit 27 in the alert area 21 where the office is located. However, the spot display unit 27 is not limited to this example. For example, the round numeral 23 of the fire detector may be used as the spot display unit 27. Further, the spot display unit 27 may be provided for each warning area 21, or a plurality of spot display parts 27 may be provided in one warning area 21.

  Further, in the alert area 21 where the office is located, there are non-illuminated areas 28 and 29 as non-illuminated areas. The non-illuminated areas 28 and 29 are areas that are not illuminated by the corresponding surface illuminating unit 26, and indicate irregularities such as pillars existing in the outer shape of the warning area 21. The above-described spot display unit 27 is also a region that is not illuminated by the surface illumination unit 26 and is a non-illuminated area that exists inside the warning area 21. Therefore, the non-illuminated areas 28 and 29 and the spot display unit 27 exist as non-illuminated areas in the alert area 21 where the office is located.

[Device configuration]
Next, the configuration of the display device 20 will be described. FIG. 1 is an exploded perspective view of a display device 20 according to the present embodiment. As shown in FIG. 1, the display device 20 includes a window plate 1 positioned on the foremost side (viewing direction side), a display sheet 2 arranged on the back side of the window plate 1, and a back side of the display sheet 2. A light-shielding sheet 8 disposed on the rear surface, a transparent pressing plate 3 disposed on the back side of the light-shielding sheet 8, and a support plate 14 serving as a light source support member. An illuminating portion 18 described later is disposed between the transparent pressing plate 3 and the support plate 14.

  The window plate 1 is a rectangular transparent plate having a relatively large thickness, and is disposed at the forefront of the display device 20 to serve as a display surface. As a constituent material of the window plate 1, for example, various transparent resins such as acrylic resin, and transparent materials such as durable glass can be used. Further, it is desirable to perform non-glare treatment for preventing front reflection on the surface side.

  The display sheet 2 is cut into substantially the same shape as the window plate 1. As the display sheet 2, for example, a transparent or translucent film made of a resin such as Mylar film can be used. On the surface of the display sheet 2, a partition diagram 22 indicating a warning area 21, a circled number 23, a character 24, and a character string 25 are formed by printing. The color of the line formed by printing is, for example, a dark color such as black if the color on the front side of the light shielding sheet 8 described later is white. This printing can be performed by using a color printer for plain paper. Therefore, if the partition diagram 22 is created by a personal computer and saved as graphic data, the correction can be easily performed in a short time, and the production cost can be reduced. Therefore, it is possible to easily cope with the layout change regardless of the size.

  In addition, when the inside of a building or the interior of a room is color-coded for each warning area, the interior of a room is color-coded for each floor, or the entire interior of a building is colored, it can be handled by color printing the entire area. be able to. In that case, since the amount of light transmission decreases when printing in a dark color, it is desirable to print in a light color with high light transmission. When printed in a light color, although depending on the light amount of the light source, that portion can be a semi-transmissive region.

  The light shielding sheet 8 is a sheet for shielding light from a portion that becomes a non-illuminated region in the display graphic formed on the display sheet 2. As the light shielding sheet 8, a PET sheet or a polycarbonate sheet of a color that does not transmit light can be used. FIG. 3 is a front view of the light shielding sheet 8. As shown in FIG. 3, the light shielding sheet 8 shields the outer peripheral area, the corridor, the stairs, and the non-illuminated areas 28 and 29 excluding the three warning areas 21 in the partition diagram 22 (FIG. 2) as non-illuminated areas. To do. As an example, such a light-shielding sheet 8 forms a figure as a light transmission area on a white or black PET sheet based on the figure data of the partitioning diagram 22, and cuts and removes this light transmission area with a laser cutter. Can be created.

  The transparent pressing plate 3 is a transparent plate material cut into substantially the same shape as the window plate 1 and the display sheet 2 and is used to hold an illumination unit 18 described later. As the transparent pressing plate 3, a transparent material such as polyethylene terephthalate resin or polycarbonate resin can be used.

  The window plate 1, the display sheet 2, the light shielding sheet 8, and the transparent pressing plate 3 described above serve as the display unit 17 in the present embodiment. The window plate 1 and the transparent pressing plate 3 function as sheet holding means for holding the display sheet 2 and the light shielding sheet 8 in a replaceable manner.

  The double-sided adhesive sheet 4 is an adhesive sheet in which adhesive layers are formed on both sides, and is cut into substantially the same shape as that of the partition diagram 22. As the double-sided adhesive sheet 4 of this embodiment, a transparent double-sided adhesive sheet having an adhesive layer that can be repeatedly peeled and having translucency is used. By this double-sided adhesive sheet 4, the display unit 17 and an illumination unit 18 described later are joined.

  The illumination unit 18 can be broadly classified as a light emitting diode (hereinafter referred to as an LED) serving as a light source, a light guide panel 5 as a light guide member that illuminates incident light toward the front side, and peripheral members thereof. It is composed of

  In the present embodiment, a surface illumination LED 11 and a spot display LED 31 are provided as LEDs. The surface illumination LED 11 is mounted on the LED printed circuit board 12 and attached to the side surface of the light guide panel 5. The wiring 13 connected to the LED printed circuit board 12 is pulled out of the apparatus and connected to a control circuit (not shown). As the surface illumination LED 11, an assembled product in which each LED is mounted on a plurality of rows of LED printed boards may be used, and the LED 11 may be used separately according to the quantity required for the mounting position. The spot LED 31 is mounted on the LED printed circuit board 32 and housed in a cylindrical light shielding cylinder 10 surrounding the LED. The wiring 33 connected to the LED printed circuit board 32 is drawn out of the apparatus from the back side of the light shielding tube 10 and connected to a control circuit (not shown). As the light source, in addition to the LED, a fluorescent lamp, a cold cathode tube, or the like can be used.

  The light guide panel 5 is a thick plate-shaped light guide member that diffuses incident light internally and illuminates the light toward the front side. Each light guide panel 5 is cut out and formed in accordance with a shape approximating the alert area to be arranged, and is reflected on a reflection tape 6 and a reflection tape, which will be described later, as a reflection member that reflects light inward in an outer peripheral area excluding an illumination surface. A film 7 is attached.

  On one side surface of the light guide panel 5, an LED printed board 12 on which surface illumination LEDs 11 are mounted is disposed, and an opaque reflective tape 6 that reflects light is attached to the back surface thereof. That is, the LED printed circuit board 12 is fixed to one side surface of the light guide panel 5 by the reflective tape 6 attached to the back surface. A reflective tape 6 is attached to the other side surface of the light guide panel 5. The reflective tape 6 is attached to each side surface of the light guide panel 5 with a transparent adhesive. The transparent adhesive (or transparent adhesive sheet) is preferably made of an adhesive member that can be repeatedly peeled. By using such an adhesive member, the LED printed circuit board 12 can be movably held on the side surface of the light guide panel 5. In the present embodiment, the example in which the reflective tape 6 is pasted as the reflective member is shown. However, on the side surface where the surface illumination LED 11 is not disposed, a reflective paint is applied to the side surface of the light guide panel 5 instead of the reflective tape 6. May be.

  As another configuration example, a double-sided adhesive sheet may be provided between the LED printed board 12 and the light guide panel 5, and the LED printed board 12 may be fixed to the side surface of the light guide panel 5 by the double-sided adhesive sheet. As the double-sided adhesive sheet, a transparent double-sided adhesive sheet having an adhesive layer that can be repeatedly peeled and having translucency is desirable. By using such a double-sided adhesive sheet, the LED printed circuit board 12 can be transferred to the side surface of the light guide panel 5 and can be securely held. Further, a diffusion film may be provided between the double-sided adhesive sheet and the light guide panel 5. This diffusion film is a diffusion member for diffusing the light from the surface illumination LED 11 so that the light guide panel 5 provides more uniform surface illumination.

  In the light guide panel 5, a light shielding hole 16 penetrating in the thickness direction of the light guide panel 5 is formed at the attachment position of the spot display portion 27 (see FIG. 2). In the light shielding hole 16, the light shielding cylinder 10 in which the spot display LEDs 31 are housed is held. The irradiation side front surface of the light shielding cylinder 10 is movably held by an adhesive layer formed on the surface of the double-sided adhesive sheet 4. The adhesive layer of the double-sided adhesive sheet 4 can be repeatedly peeled as described above, and can easily hold the light-shielding cylinder 10 containing the spot display LEDs 31 so that it can be easily changed in layout. can do. A diffusion film may be provided between the irradiation-side front surface of the spot display LED 31 and the double-sided adhesive sheet 4.

  A reflective tape 6 is attached to the inner wall surface of the light shielding hole 16 as a light shielding member. In this embodiment, the reflective tape 6 is affixed so that the reflective surface which reflects light may face the light guide panel 5 side. As described above, since the light shielding member is provided on the inner wall surface of the light shielding hole 16, the light irradiated to the light guide panel 5 from the surface illumination LED 11 does not leak into the light shielding hole 16. Uniform surface illumination can be performed without causing a shortage of light.

  In particular, by using the reflective tape 6 as a light shielding member and having a reflective surface directed toward the light guide panel 5, the light irradiated to the light guide panel 5 from the surface illumination LED 11 is near the light shielding hole 16. The light that has reached is reflected toward the inside of the panel by the reflecting tape 6 attached to the inner wall surface of the light shielding hole 16. Therefore, light loss is reduced as compared with the case where the light shielding member is not attached to this portion, and more uniform surface illumination can be performed. When the area of the light guide panel 5 is relatively small and sufficient surface illumination can be performed by the light from the surface illumination LED 11, at least light passing through the light guide panel 5 does not leak into the light shielding hole 16. do it. Therefore, for example, a black tape having no reflecting surface may be used as the light shielding member. In the present embodiment, an example in which the reflective tape 6 is attached as the reflective member to the inner wall surface of the light shielding hole 16 has been shown. However, instead of the reflective tape 6, a reflective paint is applied to the inner wall surface of the light shielding hole 16. Also good.

  An opaque reflective film 7 that reflects light is attached to the back surface of the light guide panel 5. The reflective film 7 is affixed so that the reflective surface that reflects light faces the light guide panel 5 side. In addition, an insertion hole 15 is formed in the reflective film 7 at a position corresponding to the light shielding hole 16 of the light guide panel 5. By attaching the reflection film 7 to the back surface of the light guide panel 5 through the insertion hole 15, the light shielding cylinder 10 having the surface illumination LED 11 is inserted into the light shielding hole 16, and pressed against the double-sided adhesive sheet 4. The light shielding tube 10 can be held inside the light guide panel 5. Since the insertion hole 15 of the reflective film 7 can be easily formed by hole processing, the surface illumination LED 11 can be easily transferred even when the layout is changed. Before attaching the reflection film 7 to the back surface of the light guide panel 5, the light shielding tube 10 having the surface illumination LED 11 is inserted into the light shielding hole 16 and pressed against the double-sided adhesive sheet 4, and then the insertion hole 15. Alternatively, the reflection film 7 may be pasted to block the light shielding hole 16.

  For example, a laser cutter can be used for cut-out molding (cutting) or hole machining of the light guide panel 5 as described above.

  The reflective film 7 is attached to the back surface of the light guide panel 5 with a transparent adhesive. The transparent adhesive (or transparent adhesive sheet) is preferably made of an adhesive member that can be repeatedly peeled. In the present embodiment, an example in which the reflective film 7 is pasted on the back surface of the light guide panel 5 as a reflective member has been shown. However, instead of the reflective film 7, a reflective paint is applied to the plane of the light guide panel 5. Also good.

  The light guide panel 5 may be any member as long as it can diffuse incident light internally and illuminate the light toward the front side. As an example, “Paneby” (registered trademark) manufactured by Kimoto Co., Ltd. can be used. In this light guide member, beads serving as a diffuser are uniformly dispersed inside a transparent acrylic plate, and incident light is irregularly reflected on the beads, thereby providing surface illumination. The reflection tape 6 may be any member as long as it has a property of reflecting light. The reflection film 7 may be any member as long as it has a property of reflecting light. As an example, “Ref White 188” manufactured by Kimoto Co., Ltd. can be used.

  The support plate 14 is a member for pressing the light guide panels 5 on which the surface illumination LEDs 11 and the spot display LEDs 31 are arranged from the back so as not to peel off, and a buffer material is used.

  The light guide panel 5 and the peripheral member configured as described above are joined to the transparent pressing plate 3 via the double-sided adhesive sheet 4. And by arrange | positioning the display sheet 2, the light-shielding sheet 8, the transparent pressing board 3, the double-sided adhesive sheet 4, and the illumination part 18 which were mentioned above between the window plate 1 and the support plate 14, and joining to the thickness direction, The display device 20 has a panel shape.

[Description of display principle]
Next, the display principle of the display device 20 according to the present embodiment will be described. FIG. 4 is a cross-sectional view of the main part of the display device 20. The display device 20 is connected to a composite receiver (not shown) via a signal line. For example, when a terminal device operates due to a fire, the composite receiver displays the surface illumination LED 11 in the corresponding warning area 21 of the display device 20. A control signal is supplied to. When the surface illumination LED 11 is turned on by this control signal, the light guide panel 5 is irradiated with the irradiation light L. Among the light irradiated to the light guide panel 5, a part of the light passes through the inside of the light guide panel 5 and is irradiated from the window plate 1 to the outside. Further, the other light is reflected by the diffuser uniformly dispersed in the light guide panel 5 and diffused in various directions, and after being reflected by the reflective tape 6 and the reflective film 7, the window plate 1. To the outside as light L1. With this light L1, the surface illumination unit 26 in the alert area 21 is uniformly illuminated and projected and displayed on the front side of the display unit 17. In FIG. 4, illustration of light passage in the light guide panel 5 on one side is omitted.

  Further, in the spot display LED 31 disposed at the position of the light shielding hole 16 of the light guide panel 5, the irradiation light L passes through the light shielding cylinder 10 while being irregularly reflected, and has the same circular shape as the round shape of the light shielding cylinder 10. Thus, the image is projected and displayed on the front side of the display unit 17 without passing through the inner layer of the light guide panel 5.

  Next, the illumination of the warning area 21 provided with the non-illuminated areas 28 and 29 and the spot display unit 27 will be described.

  FIG. 5 is a plan view when the light guide panel 5 is cut out and molded in accordance with the shape of the non-illuminated areas 28 and 29, and FIG. 6 is cut out and formed in a shape approximate to the warning area 21. FIG. Here, the warning area 21 with the office shown in FIG. 2 will be described as an example.

  As shown in FIG. 5, when the outer shape of the light guide panel 5 has notches corresponding to the non-illuminated areas 28 and 29, or there are through holes corresponding to the spot display unit 27 inside, surface illumination (not shown) is performed. In a place where the irradiation light L from the LED 11 does not spread, that is, in a region indicated by an alternate long and short dash line in the drawing, there occurs a problem that the surface illumination luminance is not uniform. However, in the configuration of this embodiment, as shown in FIG. 6, the light guide panel 5 has an outer shape that is cut out and formed in a shape that approximates the warning area 21, and therefore, irradiation light from the surface illumination LED 11 (not shown). L spreads to every corner of the light guide panel 5 while being diffused (the diffused irradiation light L also circulates from the lateral direction to the back side of the through hole corresponding to the spot display unit 27). 26 is uniformly illuminated. A part of the light illuminated from the light guide panel 5 is shielded by the light shielding sheet 8, and the remaining light is projected and displayed on the front side of the display unit 17. Since the projected and displayed light is obtained by shielding a part of the uniformly surface-illuminated light in a planar manner, the display unit 17 can obtain uniform surface illumination brightness.

[Effect of the embodiment]
In the display device 20 according to the present embodiment, the light guide panel 5 serving as the surface illuminating means is cut out and formed into a desired shape by a laser cutter or the like, and a reflective tape 6 or a reflective film 7 serving as a reflective member is formed in the outer peripheral area thereof. It can be manufactured by doing. According to this, as compared with the conventional technique (see FIG. 8), the light-shielding partition 104 is cut and processed into the same shape as that of the partition diagram 110 and is bonded to the back surface of the transparent plate 103 one by one. It will be easy. Therefore, the number of work steps can be reduced as compared with the conventional technique, and the manufacturing cost can be suppressed and the cost can be reduced.

  Further, since the light emitted from the surface illumination LED 11 is surface illuminated by the light guide panel 5 to the front side of the display unit 17, the light of the surface illumination LED 11 is spotted even when the area of the warning area 21 is large. In addition, it is easy to determine which warning area the fire has occurred, and display with excellent visibility can be performed.

  Furthermore, even when the display position is changed by changing the layout, the display sheet 2, the light shielding sheet 8, and the light guide panel 5 can be easily manufactured. Moreover, since it was set as the structure which irradiates the surface illumination LED11 from the side surface of the light guide panel 5, it is possible to transfer the position of the surface illumination LED11 easily, without processing the light guide panel 5 or the reflective film 7. It becomes. Furthermore, it is not necessary to modify the support plate 14 in accordance with the transfer of the surface illumination LED 11. From the above, it is possible to easily cope with layout changes. Moreover, since the surface illumination LED 11 is disposed on the side surface of the light guide panel 5, the depth dimension of the apparatus can be shortened.

  Moreover, in this embodiment, since the light guide panel 5 is cut out and shaped in accordance with a shape approximating the warning area 21, the irradiation light L from the surface illumination LED 11 is guided without being blocked by the non-illumination area. You will reach every corner of panel 5. A part of the light illuminated from the light guide panel 5 is shielded by the light shielding sheet 8 provided on the back side of the display sheet 2, and the remaining light is projected and displayed on the front side of the display unit 17. It will be. As described above, the light projected and displayed on the display unit 17 is obtained by blocking a part of the uniformly surface-illuminated light in a planar manner, so that the surface illumination luminance can be made uniform in the display unit 17. it can. Therefore, uniform surface illumination can be performed even for a display graphic having a complicated shape. Even if the shape of the non-illuminated area is complicated, the light guide panel 5 may be cut out and formed in accordance with the shape approximate to the warning area 21, so that the light guide panel 5 can be easily manufactured.

  Further, in the display device 20 according to the present embodiment, a light shielding hole 16 penetrating in the thickness direction is formed in a part of the light guide panel 5, and the light from the spot display LED 31 held therein is guided. Since it is configured to irradiate the display unit 17 without passing through the panel 5, the operating state of a fire door, a shutter, a hanging wall, etc., which are control terminal devices arranged in the warning area 21, is displayed in spots. be able to. When such spot display and surface illumination of the warning area 21 are used in combination, the location of the fire can be easily determined and the operating state of the fire door can be quickly confirmed. This makes it possible to respond more quickly. Further, since the spot display LED 31 is configured to be held inside the light blocking hole 16, the depth dimension of the apparatus can be shortened. Further, since the spot display LED 31 is movably held inside the light shielding hole 16, it is possible to easily cope with a layout change.

  Further, since the light shielding member is provided on the inner wall surface of the light shielding hole 16, the light irradiated to the light guide panel 5 from the surface illumination LED 11 does not leak into the light shielding hole 16, so that the partial light quantity is insufficient. And uniform surface illumination can be performed. In particular, in the present embodiment, the reflective tape 6 is used as the light shielding member, and the reflective surface that reflects light is directed to the light guide panel 5 side, so that the light irradiated to the light guide panel 5 from the surface illumination LED 11 is reflected. Of these, the light that reaches the vicinity of the light shielding hole 16 is reflected toward the inside of the panel by the reflective tape 6 attached to the inner wall surface of the light shielding hole 16, and the light shielding member is not attached to this portion. In comparison with this, light loss is reduced, and more uniform surface illumination can be performed.

  The present invention can be used for a guide board, an advertisement board, etc., in addition to a fire alarm system, smoke prevention equipment, security equipment, crime prevention equipment, construction equipment, safety management equipment, and the like. For example, when using it on an advertising board, not only the display of the character string “ABCDEFG” is displayed / hidden all at once, but also the above character string is displayed in different characters such as “ACE” or “ABC”. It is possible to display as a column or to display different character strings continuously such as “ABCDEFG” → “ACE” → “ABC”. Even when these displays are performed, the manufacturing cost can be reduced and the display contents can be easily changed.

The disassembled perspective view of the display apparatus concerning embodiment. The front view of the display apparatus concerning embodiment. The front view of a light shielding sheet. FIG. 3 is a cross-sectional view of a main part of the display device according to the embodiment. The top view at the time of cutting out and shape | molding a light guide panel according to the shape of a non-lighting area. The top view at the time of cutting out and shape | molding a light-guide panel according to the shape approximated with a warning area. The front view of the conventional display apparatus. The disassembled perspective view of the conventional display apparatus. Sectional drawing of the principal part of the conventional display apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Window board 2 ... Display sheet 3 ... Transparent pressing board 4 ... Double-sided adhesive sheet 5 ... Light guide panel 6 ... Reflective tape 7 ... Reflective film 8 ... Light-shielding sheet 10 ... Light-shielding cylinder 11 ... LED for surface illumination
DESCRIPTION OF SYMBOLS 12 ... LED printed circuit board 13 ... Wiring 14 ... Support plate 15 ... Insertion hole 16 ... Light-shielding hole 17 ... Display part 18 ... Illumination part 20 ... Display apparatus 21 ... Warning area 23 ... Round number 24 ... Character 25 ... Character string 26 ... Surface Illumination unit 27 ... Spot display unit 28, 29 ... Non-illumination area 31 ... LED for spot display
32 ... LED printed circuit board 33 ... Wiring

Claims (3)

A display unit on which a display graphic including a plurality of divided areas and character information is formed, and illumination for projecting and displaying the display graphic on the front side of the display unit by irradiating light from a light source from the back side of the display unit A display device comprising:
The display unit holds the transparent display sheet on which the display figure is formed, a light-shielding sheet that shields a non-illuminated area of the partition area formed on the display sheet, and the display sheet and the light-shielding sheet in a replaceable manner. Sheet holding means,
The illumination unit is cut out and formed into a shape approximating the partition area, and a light guide member that illuminates the light irradiated from the side surface toward the front side of the display unit and the partition area of the display figure A light source that is movably held on the side surface of the light guide member, and a reflection member that reflects light toward the light guide member side is provided in an outer peripheral area excluding an illumination surface of the light guide member.
A display device.   The light guide member is formed with a light shielding hole penetrating in a thickness direction, a light shielding member is formed on an inner wall surface of the light shielding hole, and a light source is movably held inside the light shielding hole. The display device according to claim 1.   The display device according to claim 2, wherein the light shielding member includes a reflective surface that reflects light, and the reflective surface is directed toward the light guide member.

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