WO2012029680A1

WO2012029680A1 - Display device

Info

Publication number: WO2012029680A1
Application number: PCT/JP2011/069377
Authority: WO
Inventors: 雅哉中道
Original assignee: 三洋電機株式会社
Priority date: 2010-08-30
Filing date: 2011-08-29
Publication date: 2012-03-08

Abstract

The present invention provides a display device having a water drainage structure in which water generated in the interior of a case is discharged to the exterior of the case. The display device of the present invention is provided with a display panel (1), a case (2) for housing the display panel, an opening (260) formed on the bottom surface (26) of the case, and a groove (261) which is formed on the inner surface side of the bottom surface of the case and which communicates with the opening.

Description

Display device

The present invention relates to a display device including a display panel.

The display device includes a housing that accommodates the display panel, and the housing is provided with an image display window that allows the screen of the display panel to be visually recognized from the outside (see, for example, Patent Document 1). In particular, in a display device for outdoor installation, a seal structure that prevents water and dust from entering the inside of the housing is provided for the housing. For example, in a configuration in which the image display window is closed by a glass plate bonded to the inner surface of the housing, a seal member is interposed between the bonding surfaces of the housing and the glass plate, so that the space between the bonding surfaces can be reduced. Ingress of water and dust is prevented.

JP 2005-286987 A

However, when the display device is installed outdoors, the seal member easily deteriorates, and there is a possibility that water may enter from between the joint surfaces as the seal member deteriorates. In addition, when the display device is installed outdoors, condensation is likely to occur in the housing.
Further, in the above display device, there is a possibility that dust may enter the housing due to some circumstances such as deterioration of the seal structure. And the penetration | invasion of the dust inside a housing | casing becomes remarkable especially when a display apparatus is installed outdoors. When dust enters the inside of the housing, the dust may adhere to the screen of the image display panel and hinder the visual recognition of the image displayed on the screen.

A display device according to the present invention includes:
A display panel;
A housing for housing the display panel;
An opening formed in the bottom surface of the housing;
A groove formed on the inner surface side of the bottom surface of the housing and communicating with the opening;
With

The opening is a drain outlet for discharging the water inside the housing to the outside, and the groove can be a drain groove for guiding the water inside the housing to the opening.

The display device of the present invention is
A display panel;
A housing for housing the display panel;
An opening formed in the bottom of the housing;
A cover member removably attached to the opening and closing a part of the opening;
With

FIG. 1 is a perspective view of a display device according to an embodiment of the present invention as viewed from the front side. FIG. 2 is a perspective view of the display device as seen from the back side. FIG. 3 is a rear view of the display device. FIG. 4 is an exploded perspective view of the display device as viewed from the front side. FIG. 5 is an exploded perspective view of the display device as viewed from the back side. 6 is a cross-sectional view taken along the line AA shown in FIG. FIG. 7 is an enlarged view of region B shown in FIG. FIG. 8 is an enlarged view of a region C shown in FIG. FIG. 9 is a cross-sectional view taken along the line DD shown in FIG. FIG. 10 is an enlarged view of region E shown in FIG. FIG. 11 is an enlarged view of an F region shown in FIG. FIG. 12 is a perspective view showing a second flow path forming member provided in the display device. FIG. 13 is an enlarged view of the second flow path forming member. FIG. 14 is a perspective view of the display device as seen from the bottom side. FIG. 15 is an exploded perspective view of the display device viewed from the bottom side. FIG. 16 is a perspective view of the front-side case half constituting the housing as viewed from above the rear side. FIG. 17 is a perspective view of the front case half as viewed from the lower rear side. FIG. 18 is an enlarged view of a cover member provided in the display device. FIG. 19 is a cross-sectional view showing a modification of the drainage structure of the display device. FIG. 20 is an exploded perspective view of an air intake section included in the display device. FIG. 21 is an exploded perspective view of an insertion tool and an intake-side filter included in the display device. FIG. 22 is a perspective view showing a fixed state of the insertion tool to the intake section. FIG. 23 is a block diagram showing a configuration for notifying filter clogging in the display device. FIG. 24 is an enlarged view of region G shown in FIG.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
1. Configuration of Display Device FIGS. 1 and 2 are perspective views of a display device according to an embodiment of the present invention as viewed from the front side and the back side, respectively. FIG. 3 is a rear view of the display device. 4 and 5 are exploded perspective views of the display device viewed from the front side and the back side, respectively. As shown in FIGS. 1 to 3, the display device includes a housing (2). As shown in FIGS. 4 and 5, the housing (2) includes a front case half (210) constituting a front wall (21) which is the front surface of the housing (2), and a housing (2). The back side case half (220) constituting the back wall (22) as the back is joined to each other. The housing (2) contains a liquid crystal display panel (1) and a circuit board (11) for controlling the liquid crystal display panel (1). The circuit board (11) It is installed on the back surface (12) of the liquid crystal display panel (1). The display device according to the present embodiment is built in another device such as a vending machine. Of course, the display device can be used alone without being incorporated in another device such as a vending machine.

Here, the front wall (21) of the housing (2) is provided with an image display window (20) that makes the screen (10) of the liquid crystal display panel (1) visible from the outside. The image display window (20) is closed by a glass plate (202). In this embodiment, a capacitive touch panel is provided on the glass plate (202).

6 is a cross-sectional view taken along the line AA shown in FIG. 3, and FIGS. 7 and 8 are enlarged views of the B region and the C region shown in FIG. 6, respectively. As shown in FIGS. 7 and 8, the glass plate (202) has a shape and size larger than that of the image display window (20), and the outer edge (203) of the glass plate (202) has a housing ( It overlaps the front wall (21) of 2) from the inside. And inside the housing | casing (2), the pressing metal fitting (23) which presses a glass plate (202) toward a front wall (21) is provided, and with the pressing force of this pressing metal fitting (23), A glass plate (202) is joined to the inner surface of the front wall (21). On the other hand, the liquid crystal display panel (1) is installed at a position where a gap S is formed between the screen (10) and the glass plate (202).

As shown in FIGS. 7 and 8, a seal member (24) surrounding the image display window (20) is interposed between the joint surfaces of the front wall (21) and the glass plate (202). This prevents water from entering between the joint surfaces. Further, a buffer member (25) is interposed between the glass plate (202) and the presser fitting (23).

9 is a cross-sectional view taken along the line DD shown in FIG. 3, and FIGS. 10 and 11 are enlarged views of the E region and the F region shown in FIG. 9, respectively. As shown in FIGS. 9 to 11 (see also FIGS. 1 to 5), the housing (2) is placed on the back wall (22) at the right and left ends as viewed from the back. An intake part (3) and an exhaust part (4) are provided to communicate the outside and the inside of 2) with each other. The intake section (3) has a posture with its open end (30) facing rightward, while the exhaust section (4) has a posture with its open end (40) facing left. is doing. Here, the intake section (3) functions as a ventilation section that allows air to pass from the outside to the inside of the casing (2), and the exhaust section (4) is provided from the inside of the casing (2). It functions as a ventilation part that allows air to pass outside. In the present embodiment, the intake portion (3) and the exhaust portion (4) both have a shape and dimensions that are wide in the vertical direction.

As shown in FIG. 9, a flow path (5) extending from the intake section (3) to reach the exhaust section (4) is formed inside the housing (2). The liquid crystal display panel (1) passes through a gap S between the screen (10) and the glass plate (202). Specifically, the flow path (5) extends from the first flow path section (51) passing in the horizontal direction on the screen (10) of the liquid crystal display panel (1) and the intake section (3) to display the liquid crystal display. An intake side channel portion (52) that passes through the right side surface of the panel (1) and reaches the first channel portion (51), and a left side surface side of the liquid crystal display panel (1) that extends from the exhaust portion (4) And an exhaust-side flow path portion (53) that reaches the first flow path portion (51).

Here, the first flow path portion (51) is formed by the screen (10) of the liquid crystal display panel (1) and the glass plate (202). Further, the intake-side flow path portion (52) and the exhaust-side flow path portion (53) are respectively formed by a first flow path forming member (61) and a second flow path forming member (62) as shown in FIGS. Is formed.

FIG. 12 is a perspective view showing the second flow path forming member (62), and FIG. 13 is an enlarged view of the second flow path forming member (62). As shown in FIGS. 12 and 13 (see also FIG. 11), the back wall (62b) of the second flow path forming member (62) is formed with openings (621) at three locations, an upper stage, a middle stage, and a lower stage. Has been. Further, a slit-like passageway (622) extending vertically is provided in the front wall (62a) of the second flow path forming member (62). Each opening (621) and passage (622) communicate with each other within the second flow path forming member (62).

As shown in FIG. 13, in the second flow path forming member (62), two partition members extending from the rear wall (62b) to the front wall (62a) and further into the passage (622). (623) (623) are provided. Here, each partition member (623) is a plate-like member that expands in the horizontal direction in the assembled state of the display device. As a result, the space in the second flow path forming member (62) (that is, the exhaust side flow path section (53)) is partitioned into three spaces (531) to (531). Specifically, one opening (621) corresponds to each space (531), and the space (531) communicates with the passage (622) from the corresponding opening (621). Thus, the exhaust-side flow path portion (53) is divided into a plurality of spaces (531) to (531) communicated from the exhaust portion (4) to the first flow path portion (51) by the partition members (623) and (623). It is divided into.

The first flow path forming member (61) has the same configuration as the second flow path forming member (62). That is, referring to FIG. 10, the back wall (61b) of the first flow path forming member (61) has openings (611) formed at three locations thereof, and the front surface of the first flow path forming member (61). The wall (61a) is provided with a slit-like passageway (612) that extends vertically. Further, the space in the first flow path forming member (61) (that is, the intake side flow path section (52)) is partitioned into three spaces (521) to (521) by the partition member. Each space (521) corresponds to one opening (611), and the space (521) communicates with the passage (612) from the corresponding opening (611). Thus, the intake side flow path portion (52) is partitioned by the partition member into a plurality of spaces (521) to (521) communicating from the intake portion (3) to the first flow path portion (51).

Furthermore, as shown in FIGS. 12 and 13, nine through holes (624) to (624) arranged in the vertical direction are formed in the side wall (62c) of the second flow path forming member (62). Three through holes (624) correspond to the three spaces (531) to (531) in the second flow path forming member (62). Here, as shown in FIG. 11, each through hole (624) is formed in the space on the back surface (12) side of the liquid crystal display panel (1) and in the second flow path forming member (62) in the assembled state of the display device. The space (that is, the exhaust-side flow path portion (53)).

Referring to FIG. 10, nine through holes (614) to (614) are formed in the side wall (61c) of the first flow path forming member (61), similarly to the second flow path forming member (62). Has been. Therefore, the space on the back surface (12) side of the liquid crystal display panel (1) and the space in the first flow path forming member (61) (that is, the intake side flow path section (52)) form the through hole (614). Are in communication with each other.

Thus, as shown in FIG. 9, the casing (2) further passes through the back surface (12) side of the liquid crystal display panel (1) and flows from the intake side flow passage portion (52) to the exhaust side flow. A second flow path part (54) extending to the path part (53) is formed, and a part of the flow path (5) is constituted by the second flow path part (54).

As shown in FIG. 4, three fans (71) to (71) are arranged in the air intake section (3) facing forward. Specifically, as shown in FIG. 10, each fan (71) is provided corresponding to one space (521) in the intake-side flow path portion (52), and the inside of the space (521) It has a posture and a position where air can be sent to. Accordingly, as each fan (71) is driven, the air in the intake section (3) moves to the space (521) corresponding to the fan (71) as indicated by the solid arrow in FIG. The air flows in the horizontal direction in the space (521) without being mixed with the air flowing in the other space (521), and the first flow path portion (51) and the second flow path portion (54). Flow into. Along with this, air outside the casing is sucked from the opening end (30) of the intake section (3).

As shown in FIG. 4, in the exhaust part (4), three fans (72) to (72) are arranged facing forward. Specifically, as shown in FIG. 11, each fan (72) is provided corresponding to one space (531) in the exhaust side flow path portion (53), and the inside of the space (531) It has a posture and a position where air can be extracted from the air. Accordingly, when each fan (72) is driven, the first flow path portion (51) and the second flow path are moved to the space (531) corresponding to the fan (72) as shown by a solid arrow in FIG. The air in the section (54) flows in, and then the air flows in the horizontal direction in the space (531) and moves to the exhaust section (4). Along with this, air inside the housing is discharged from the open end (40) of the exhaust (4).

Therefore, when the fans (71) and (72) are driven, the first flow path portion (51) and the second flow path portion (54) are respectively introduced from the intake side as indicated by solid arrows in FIG. An air flow that moves in the horizontal direction toward the exhaust side is generated.

As shown in FIGS. 2 and 10, the intake portion (3) is provided with a pair of intake side filters (73) and (73) at positions near the open end portion (30). As shown in FIGS. 1 and 11, the exhaust section (4) is provided with a pair of exhaust-side filters (74) and (74) in the vicinity of the opening end (40). Here, the intake filter (73) has a higher filter function (dust collection performance) than the exhaust filter (74). Specifically, the exhaust side filter (74) is composed of a mesh, whereas the intake side filter (73) is composed of a mesh and a finer filter material than the mesh. (See FIG. 21).

In the display device, by driving the fans (71) and (72), cold air outside the casing is sucked into the casing from the intake section (3), and the air is exhausted along the flow path (5). Part (4). At this time, the air flowing in the first flow path portion (51) absorbs heat accumulated in the screen (10) of the liquid crystal display panel (1), and the air flowing in the second flow path portion (54) Absorbs heat accumulated on the circuit board (11). On the other hand, the air heated in the first flow path part (51) and the second flow path part (54) is discharged from the exhaust part (4) to the outside of the housing.

Here, in the display device described above, the air sent from each fan (71) in the intake section (3) passes through the space (521) corresponding to the fan (71) in another space (521). It flows in the horizontal direction without being mixed with the air flowing through the first flow path portion (51) and the second flow path portion (54). For this reason, the air sent out from the three fans (71) to (71) does not collide with each other in the intake side flow path section (52) to generate turbulence or vortex, and therefore the liquid crystal display panel (1 ) On the screen (10), that is, in the first flow path portion (51), air tends to flow uniformly in the horizontal direction. Further, air easily flows in the horizontal direction on the back surface (12) side of the liquid crystal display panel (1), that is, in the second flow path portion (54).

Therefore, according to the display device, the entire screen (10) of the liquid crystal display panel (1) and the circuit board (11) are efficiently cooled by the air sucked from the air intake section (3). Therefore, even if the screen (10) of the liquid crystal display panel (1) is heated by sunlight incident from the image display window (20) and the circuit board (11) is driven to generate heat, the liquid crystal display panel (1) ) Of the screen (10) and the circuit board (11) are suppressed, and as a result, normal operations of the liquid crystal display panel (1) and the circuit board (11) are maintained. In addition, since air flows uniformly in the first flow path portion (51), unevenness in the sensitivity of the touch panel on the glass plate (202) hardly occurs.

Further, even when the temperature of the outside air is low, the temperature difference between the glass plate (202) and the outside air is reduced by feeding cold air into the first flow path portion (51), and as a result, the glass Condensation hardly occurs on the inner surface of the plate (202). Even if condensation occurs on the inner surface of the glass plate (202) or the screen (10) of the liquid crystal display panel (1), the condensed water droplets are caused by the air flowing on the screen (10) of the liquid crystal display panel (1). Blown away. Therefore, it is difficult for water droplets to adhere to the screen (10) and the glass plate (202) of the liquid crystal display panel (1), and as a result, the liquid crystal display panel (1) is always in a state where the screen (10) is visible. Will be maintained.

In the above display device, when the fans (71) and (72) are driven, a large amount of air outside the casing flows into the casing through the intake section (3). Here, the intake filter (73) has a higher filter function (dust collection performance) than the exhaust filter (74). Therefore, even when a large amount of air is inhaled from the intake section (3), most of the dust in the air is captured by the intake side filter (73). Therefore, air with a very small dust content is introduced into the housing, and as a result, the failure of the display panel (1) that may be caused by dust is prevented.

Further, in the above display device, a pair of exhaust side filters (74) and (74) are provided in the exhaust part (4). Therefore, when the fans (71) and (72) are stopped, even if air flows from the outside to the inside of the housing (2) through the exhaust section (4), the dust in the air is removed from the exhaust filter ( 74) Captured by (74). Accordingly, the intrusion of dust into the housing is prevented, and as a result, the failure of the liquid crystal display panel (1) and the circuit board (11) that may be caused by the dust is prevented.

2. Drainage structure and configuration capable of cleaning inside casing FIGS. 14 and 15 are a perspective view and an exploded perspective view, respectively, of the display device viewed from the bottom side. As shown in FIG. 15, three openings (260) to (260) penetrating the bottom wall (26) from the inner surface to the outer surface are formed in the bottom wall (26) serving as the bottom surface of the housing (2). Has been. Here, each opening (260) has a shape elongated in the horizontal direction, and the three openings (260) to (260) are arranged in a row in the horizontal direction.

FIGS. 16 and 17 are perspective views of the front case half (210) of the housing (2) as viewed from the upper rear side and the lower rear side, respectively. As shown in FIG. 16 (see also FIG. 8), the bottom wall (26) of the housing (2) has water on its inner surface that drains outside the housing to the openings (260) to (260). A first groove (261) serving as a drainage groove for guiding is recessed. Further, as shown in FIGS. 16 and 17, the pair of left and right side walls (27) and (28), which are the side surfaces of the housing (2), have water on their inner surfaces that are discharged to the outside of the housing. Are formed on the bottom wall (26). Further, as shown in FIG. 17, the upper surface wall (29) of the housing (2) has a third groove on its inner surface for guiding water to be discharged outside the housing to the side wall (27). (291) is formed.

As shown in FIGS. 14 and 15, a cover member (262) for closing the central region of each opening (260) is detachably attached to the bottom wall (26) of the housing (2). Here, as shown in FIG. 18, the cover member (262) is formed with a fitting portion (263) that fits into the opening (260), and the fitting portion (263) is opened. By fitting with (260), the cover member (262) is attached to the bottom wall (26) of the housing (2) as shown in FIG.

In the above display device, as shown in FIGS. 8 and 15, by removing the cover member (262) from the bottom wall (26) of the housing (2), a rod-shaped cleaning tool is placed inside the housing from each opening (260). The dust attached to the screen (10) of the liquid crystal display panel (1) can be removed. Thus, the display device has a configuration capable of cleaning the inside of the housing (the screen (10) of the liquid crystal display panel (1)). Although not shown in the drawings, in the present embodiment, an opening is formed in the presser fitting (23) so that the cleaning tool can be inserted onto the screen (10) of the liquid crystal display panel (1). .

When the cleaning operation is not performed, a cover member (262) is attached to the bottom wall (26) of the housing (2) as shown in FIG. 14, thereby preventing dust from entering each opening (260). Will be suppressed. When the cover member (262) is attached to the bottom wall (26), the central region of each opening (260) is blocked by the cover member (262), while both end regions remain exposed. Therefore, the exposed area can function as a drain outlet. In other words, if water enters the housing due to some reason, for example, when the display device is installed outdoors and the seal member (24) deteriorates, the water moves onto the bottom wall (26) by gravity. Then, it is discharged from the exposed area (drainage port) of each opening (260). Even when condensation occurs in the housing (2), the condensed water moves on the bottom wall (26) due to gravity, and then from the exposed area (drain) of each opening (260). Will be discharged. Thus, the display device has a drainage structure for discharging water generated inside the housing to the outside of the housing. Such a drainage structure is realized because the display device of this embodiment has a configuration in which air flows in the horizontal direction in the housing (2).

Here, in the display device, the second grooves (271) and (281) are formed on the inner surfaces of the side walls (27) and (28), and the third groove (291) is formed on the inner surface of the upper surface wall (29). Is formed. Therefore, water generated inside the casing for some reason is efficiently guided onto the bottom wall (26). A first groove (261) is formed on the inner surface of the bottom wall (26). Therefore, the water on the bottom wall (26) can easily move to the exposed area (drain) of each opening (260), and as a result, the water is efficiently discharged from the area (drain). Become.

FIG. 19 is a cross-sectional view showing a modification of the drainage structure of the display device. As shown in FIG. 19, the first groove (261) is provided with a raised portion (264) extending in the lateral direction along the inner surface of the bottom wall (26). 264) and the front wall (21) of the housing (2).

In the above display device, in addition to the opening (260) serving as a drainage port, at least one of the side walls (27), (28) and the upper surface wall (29) of the housing (2) has a rod-like cleaning. An opening for inserting the tool into the housing may be formed, and a cover member for closing the opening may be detachably attached.

3. FIG. 20 is an exploded perspective view of the intake section (3). As shown in FIG. 20, a pair of intake windows (311) for inserting a pair of intake side filters (73), (73) into the intake section (3) are respectively provided in the back portion (31) of the intake section (3). ) (311) has been established. Here, the display device includes an insertion tool (32) that can be inserted and removed from each insertion window (311), and an intake side filter (73) is attached to the insertion tool (32).

FIG. 21 is an exploded perspective view of the insertion tool (32) and the intake side filter (73). As shown in FIG. 21, each insertion tool (32) includes a storage case (320) formed by joining two case halves (321) and (321), and a support for supporting the storage case (320). It consists of a body (322). On the other hand, each intake side filter (73) includes a mesh (731) and a filter material (732) finer than the mesh (731). The mesh (731) and the filter material (732) are accommodated in the accommodating case (320) of the insertion tool (32) in a state where they are overlapped.

Further, as shown in FIG. 21, the support (322) of each insertion tool (32) is formed with a pair of upper and lower flanges (323) and (323), and each flange (323) is inserted into the support (322). When the tool (32) is inserted into the corresponding insertion window (311), it comes into contact with the back part (31) of the intake part (3). On the other hand, as shown in FIG. 20, on the back portion (31) of the air intake portion (3), there are arm portions (33) and (33) at two places, upper and lower, located in the vicinity of the formation region of each insertion window (311). It is pivotally supported. Here, one arm portion (323) corresponds to each arm portion (33) (33). In addition, when the insertion tool (32) is inserted into the insertion window (311), each arm portion (33) has a predetermined rotation angle and a collar portion (323) corresponding to the arm portion (33). Thus, as shown in FIG. 22, the hook part (323) is sandwiched between the arm part (33) and the back part (31) of the intake part (3) as shown in FIG. However, it is fixed to the intake portion (3) in a state of being inserted into the corresponding insertion window (311).

Furthermore, each arm part (33) and the back part (31) of the intake part (3) are provided with a locking mechanism for locking the arm part (33) to the intake part (3) at the predetermined rotation angle. ing. Here, the locking mechanism includes a locking projection (312) provided on the back portion (31) of the intake portion (3) and a locking projection (312) provided on the tip of the arm portion (33). It is comprised from the latching recessed part (331) engaged with. Thus, the fixing mechanism for fixing each insertion tool (32) to the intake portion (3) in a state of being inserted into the corresponding insertion window (311) includes the flange portion (323) and the arm portion (33). And the locking mechanism. In addition, the operation part (332) for user operation is provided in the front-end | tip part of each arm part (33).

According to the display device, the insertion side filter (73) is detachably installed in the intake portion (3) by inserting the corresponding insertion tool (32) from each insertion window (311). Will be. Here, each insertion window (311) is formed in the back part (31) of the intake part (3). Therefore, even when the duct is attached to the opening end (30) of the intake section (3), the intake side filter (73) can be easily replaced. In addition, since the intake side filter (73) can be replaced from the back side of the display device, it is easy for a service person or the like to replace the intake side filter (73). The configuration that enables the filter replacement from the back side of the display device in this way is particularly effective when the display device is built in another device such as a vending machine.

Moreover, according to the display device, it is possible to design the fixing mechanism with a small height. Therefore, the display device does not need to be increased in thickness although it has a configuration in which the intake side filter (73) is replaced from the back side.

In the present embodiment, the exhaust unit (4) has the same configuration as the intake unit (3). However, the exhaust side filter (74) provided in the exhaust part (4) is comprised only from the mesh.

4). Configuration for Notifying Filter Clogging In the above display device, dust trapped by the intake side filter (73) accumulates on the intake side filter (73). When the amount of accumulated dust increases, the intake filter (73) becomes clogged, and this prevents air from being sucked into the housing. Therefore, if the intake side filter (73) is clogged, it is necessary to replace the filter. On the other hand, if the time for replacement is overdue, the temperature of the liquid crystal display panel (1) rises excessively. Abnormality is likely to occur in the operation of 1).

FIG. 23 is a block diagram showing a configuration for notifying filter clogging in the display device. As shown in FIG. 23, the display device includes a temperature sensor (81) that acquires temperature information that changes according to the temperature of the liquid crystal display panel (1), and a velocity of air that flows in the intake section (3). A wind speed sensor (82) for acquiring changing wind speed information, a notification section (83) for notifying clogging of the intake side filter (73), and temperature information and wind speed sensor (82) acquired by the temperature sensor (81) Is provided with a control unit (84) for controlling the notification operation of the notification unit (83) based on the wind speed information acquired by the above, and a memory (85) in which various types of information are recorded.

Here, as shown in FIG. 10, the temperature sensor (81) is installed in the vicinity of the liquid crystal display panel (1) in the intake-side flow path portion (52). Further, the wind speed sensor (82) is installed at a position between the intake side filter (73) and the fan (71) in the intake section (3). When the intake side filter (73) is clogged, the temperature in the intake side flow path (52) rises due to the heat from the liquid crystal display panel (1) as compared with the case where there is no clogging. The speed of the air discharged through the intake side filter (73) becomes larger than when there is no clogging.

FIG. 24 is an enlarged view of the G region shown in FIG. As shown in FIG. 24, a through-hole (221) that penetrates the rear wall (22) from the inner surface to the outer surface is formed in the rear wall (22) of the housing (2). On the other hand, the notification unit (83) is configured by an LED (Light Emitting Diode), and is provided on the back surface (12) side of the liquid crystal display panel (1) inside the housing. Here, the notification unit (83) has a posture directed to the through hole (221). Therefore, the user can recognize the light from the notification unit (83) through the through hole (221) from the back side of the housing (2). In addition, on the back wall (22) of the housing (2), as shown in FIG. 24, a plurality of liquid crystal display panels (1) for adjusting the image quality and the like at positions near the formation region of the through holes (221). Adjustment buttons (222) to (222) are provided.

The control unit (84) is configured on the circuit board (11). As shown in FIG. 23, the control unit (84) determines whether or not the temperature of the liquid crystal display panel (1) is higher than a predetermined temperature based on the temperature information acquired by the temperature sensor (81). And a second determination unit (842) for determining whether or not the speed of the air flowing in the intake unit (3) is greater than a predetermined speed based on the wind speed information acquired by the wind speed sensor (82). Is included.

Here, after the display device is installed at a certain position indoors or outdoors, when the display device is first driven, temperature information and wind speed information are respectively acquired by the temperature sensor (81) and the wind speed sensor (82). These pieces of information are recorded in the memory (85) as initial information. The predetermined temperature and the predetermined speed are set based on the initial information, and these information are also recorded in the memory (85).

As shown in FIG. 23, the control unit (84) further instructs the notification unit (83) to execute the notification operation based on the determination results of the first determination unit (841) and the second determination unit (842). Part (843). Specifically, the command unit (843) determines that the temperature of the liquid crystal display panel (1) is higher than a predetermined temperature by the first determination unit (841), or intakes the air by the second determination unit (842). When it is determined that the speed of the air in the section (3) is greater than the predetermined speed, the notification section (83) is instructed to perform a notification operation.

The notification unit (83) notifies the clogging of the intake side filter (73) by turning on or blinking the LED in response to a command from the command unit (843).

According to the above display device, the notification unit (83) can notify that the intake side filter (73) is clogged, that is, that it is time to replace the intake side filter (73). Here, the user can recognize light from the notification unit (83) through the through hole (221) from the back side of the housing (2). Therefore, a user such as a serviceman who often visually recognizes the back surface of the display device can easily recognize clogging of the intake side filter (73).

Further, according to the display device, the situation can be notified immediately after the intake side filter (73) is clogged. Accordingly, it is possible to prevent the temperature of the liquid crystal display panel (1) from excessively rising due to the time for replacing the intake side filter (73).

In the above display device, as shown in FIG. 11, another temperature sensor (86) is installed in the vicinity of the liquid crystal display panel (1) in the exhaust side flow path portion (53), and the exhaust portion (4 ), Another wind speed sensor (87) is installed at a position between the exhaust side filter (74) and the fan (72), and the temperature information acquired by the temperature sensor (86) and the wind speed sensor (87 ) May notify the clogging of the exhaust filter (74) by the notification unit (83). If the exhaust filter (74) is clogged, the temperature in the exhaust channel (53) rises due to the heat from the liquid crystal display panel (1), compared to when there is no clogging. The speed of air immediately before passing through the exhaust filter (74) is smaller than when there is no clogging.

The configuration of each part of the present invention is not limited to the above-described embodiment, and various modifications can be made within the technical scope described in the claims. For example, in the display device, one of the intake-side flow path portion (52) and the exhaust-side flow path portion (53) extends through the upper surface side of the liquid crystal display panel (1), and the other The flow path portion may extend through the lower surface side of the liquid crystal display panel (1). In this case, the first flow path portion (51) passes in the vertical direction on the screen (10) of the liquid crystal display panel (1). In addition, an intake portion (3) and an exhaust portion (4) may be provided on the rear wall (22) of the housing (2) in a vertical relationship.

The display device may have a configuration in which only one of the fans (71) and (72) is provided. Further, in the display device, the control unit (84) performs the notification operation of the notification unit (83) based only on information acquired by any one of the temperature sensor (81) and the wind speed sensor (82). You may control.

The various configurations employed in the display device are not limited to display devices having a liquid crystal display panel, but may be applied to display devices having various display panels such as plasma display panels and organic EL (Electro-Luminescence) display panels. I can do it.

(1) Liquid crystal display panel (display panel)
(2) Case
(21) Front wall
(22) Back wall
(26) Bottom wall
(260) Opening (drain)
(261) First groove (drainage groove)
(262) Cover member
(264) Raised part
(27) Side wall
(271) Second groove
(5) Flow path
(71) Fan
(72) Fan

Claims

A display panel;
A housing for housing the display panel;
An opening formed in the bottom surface of the housing;
A groove formed on the inner surface side of the bottom surface of the housing and communicating with the opening;
Display device.
A flow path formed inside the housing and passing horizontally through the front side and / or the back side of the display panel;
A fan that is provided in the housing and causes the air in the flow path to flow along the flow path;
The display device according to claim 1, further comprising:
On the inner surface side of the bottom surface of the housing, there is a raised portion provided to extend in the lateral direction along the inner surface,
The display device according to claim 1, wherein the groove is formed between the raised portion and a front surface constituting the housing.
The display device according to claim 1, further comprising a second groove formed on an inner surface side of the side surface of the housing and leading to an inner surface side of the bottom surface.
2. The display device according to claim 1, wherein the opening is a drain outlet for discharging water inside the housing to the outside.
The display device according to claim 1, wherein the groove is a drainage groove that guides water inside the housing to the opening.
The display device according to claim 1, wherein the casing has a waterproof structure.
The display device according to claim 1, further comprising a cover member that is detachably attached to the opening and closes a part of the opening.
A display panel;
A housing for housing the display panel;
An opening formed in the bottom of the housing;
A cover member removably attached to the opening and closing a part of the opening;
Display device.