JP5598915B2 - Image display device - Google Patents

Description

  The present invention relates to an image display device including an image display panel.

  This type of image display device includes a housing that accommodates an image display panel, and the housing is provided with an image display window that allows the screen of the image display panel to be visually recognized from the outside (for example, Patent Documents). 1). Conventionally, most image display apparatuses are designed on the assumption that they are installed indoors, and it has not been assumed that the screen of the image display panel is heated by sunlight incident from the image display window.

JP 2005-286987 A

  In recent years, it has been considered that an image display device is permanently installed outdoors, or that the image display device is mounted in another device such as a vending machine installed outdoors. However, when the conventional image display device is permanently installed outdoors, or the conventional image display device is directly installed in another device such as a vending machine, the temperature of the screen of the image display panel is excessively increased by sunlight. This may cause an abnormality in the operation of the image display panel.

  Therefore, in order to cool the image display panel in the image display device, an air intake unit for sucking air from the outside to the inside of the housing and an air exhaust from the inside to the outside of the housing The exhaust part is provided, and a flow path leading from the intake part to the exhaust part is formed inside the housing. In this configuration, a plurality of fans that flow the air in the flow path from the intake section toward the exhaust section are provided in the intake section so as to be separated from each other. A filter is provided for trapping dust.

  This image display apparatus has a configuration in which air sent from a plurality of fans passes through the same space in the flow path. For this reason, air sent out from the fans collides with each other to generate turbulent flow and vortices. As a result, the turbulent flow and vortices hinder efficient cooling of the image display panel.

  Accordingly, an object of the present invention is to provide an image display apparatus capable of efficiently cooling an image display panel.

  An image display device according to the present invention includes an image display panel and a housing that accommodates the image display panel, and the housing is provided with a ventilation portion that allows communication between the outside and the inside of the housing. A plurality of fans are arranged in a predetermined direction in the ventilation portion. Here, a flow path extending from the ventilation portion to reach the surface of the image display panel is formed inside the housing, and the flow path is formed in the flow path from the ventilation portion to the surface of the image display panel. A partition member for partitioning into a plurality of communicating spaces is provided, and one space in the flow path corresponds to each fan.

  According to the image display device, air is guided to the inside of the housing through the ventilation portion by driving the fan, and the image display panel is cooled by the air. Here, in the image display device, one space in the flow path corresponds to each fan. Therefore, the air sent from each fan flows in the space corresponding to the fan to the surface of the image display panel without mixing with the air flowing in another space. For this reason, air sent out from a plurality of fans does not collide to generate turbulent flow or vortex, and air easily flows uniformly on the surface of the image display panel. Therefore, even when the screen of the image display panel is heated by sunlight, the image display panel is efficiently cooled by the air from the fan. As a result, the temperature increase of the image display panel is suppressed, and the image display panel Normal operation will be maintained.

  In the specific configuration of the image display device, the casing is provided with a second ventilation portion that allows communication between the outside and the inside of the casing, and the flow path passes through the screen of the image display panel. It reaches the second ventilation part, and the partition member partitions a part of the flow path into a plurality of spaces that lead from the ventilation part to the screen of the image display panel.

  According to the specific configuration, air can easily flow uniformly on the screen of the image display panel. Therefore, the entire screen of the image display panel is efficiently cooled. Even when condensation occurs on the screen of the image display panel, the condensed water droplets are blown off by the air flowing on the screen of the image display panel. Accordingly, it is difficult for water droplets to adhere to the screen of the image display panel. As a result, the image display panel is always maintained in a state where the screen is visible.

  According to the image display device of the present invention, the image display panel can be efficiently cooled.

FIG. 1 is a perspective view of an image display device according to an embodiment of the present invention as viewed from the front side. FIG. 2 is a perspective view of the image display device as seen from the back side. FIG. 3 is a rear view of the image display apparatus. FIG. 4 is an exploded perspective view of the image display device as viewed from the front side. FIG. 5 is an exploded perspective view of the image display device as viewed from the back side. 6 is a cross-sectional view taken along 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 image display device. FIG. 13 is an enlarged view of the second flow path forming member. FIG. 14 is a perspective view of the image display device as viewed from the bottom side. FIG. 15 is an exploded perspective view of the image display device as seen 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 included in the image display device. FIG. 19 is a cross-sectional view showing a modified example of the drainage structure of the image display device. FIG. 20 is an exploded perspective view of an air intake section included in the image display device. FIG. 21 is an exploded perspective view of an insertion tool and an intake side filter included in the image 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 illustrating a configuration for notifying filter clogging in the image 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 Image Display Device FIGS. 1 and 2 are perspective views of an image display device according to an embodiment of the present invention as seen from the front side and the back side, respectively. FIG. 3 is a rear view of the image display apparatus. 4 and 5 are exploded perspective views of the image display device as viewed from the front side and the back side, respectively. As shown in FIGS. 1 to 3, the image display device includes a housing (2). As shown in FIGS. 4 and 5, the housing (2) includes a front case half (210) constituting the front wall (21) of the housing (2) and a rear wall (210) of the housing (2). 22) and the back side case half (220) are 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). Note that the image display apparatus according to the present embodiment is built in another apparatus such as a vending machine. Of course, the image 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 allows the screen (10) of the liquid crystal display panel (1) to be visually recognized 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 a region B and a region C 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 rear wall (22) at the right and left ends as viewed from the rear side. 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. 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 image display device. Thus, 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) communicating 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) that lead from the intake portion (3) to the first flow path portion (51).

  Further, 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) has a space on the back surface (12) side of the liquid crystal display panel (1) and a second flow path forming member (62) in the assembled state of the image display device. The internal space (that is, the exhaust-side flow path portion (53)) is communicated.

  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 intake portion (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 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 opening 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 image 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 flows along the flow path (5). It will flow to the exhaust 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 image display device, the air sent out from each fan (71) in the intake section (3) passes through the space (521) corresponding to the fan (71) to another space (521). It flows in the horizontal direction without mixing with the air flowing through it, and flows into the first flow path part (51) and the second flow path part (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 turbulent flow or vortex, and accordingly, 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 image 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 image 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 casing, and as a result, failure of the image display panel (1) that may be caused by dust is prevented.

  In the image 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 image display device viewed from the bottom side. As shown in FIG. 15, the opening (260)-(260) which penetrates the bottom wall (26) from the inner surface to the outer surface is formed in the bottom wall (26) of the housing (2). . Here, each opening (260) has a shape elongated in the horizontal direction, and the three openings (260) to (260) are arranged in a line in the horizontal direction.

  FIGS. 16 and 17 are perspective views of the front case half (210) of the housing (2) as seen from above the back side and below the back side. 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) for guiding is recessed. Also, as shown in FIGS. 16 and 17, the pair of left and right side walls (27), (28) of the housing (2) has water on the inner surface of the bottom wall. (26) Second grooves (271) and (281) are formed to guide the top. 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) that closes 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 image 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 provided from each opening (260). It can be inserted inside to remove dust adhering to the screen (10) of the liquid crystal display panel (1). Thus, the image 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. That is, if water enters the casing due to some circumstances, such as when the image display device is installed outdoors and the seal member (24) deteriorates, the water is moved onto the bottom wall (26) by gravity. After that, it will be discharged from the exposed area (drain) 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 image display device has a drainage structure for discharging water generated inside the casing to the outside of the casing. Such a drainage structure is realized because the image display device of the present embodiment has a configuration in which air flows in the horizontal direction in the housing (2).

  Here, in the image 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 image 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 image display device, in addition to the opening (260) serving as a drain port, a rod-like shape is formed on at least one of the side walls (27), (28) and the top wall (29) of the housing (2). An opening for inserting the cleaning tool into the housing may be formed, and a cover member that closes 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 portion (3) are respectively provided in the back portion (31) of the intake portion (3). ) (311) has been established. Here, the image 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 image display device, the intake 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 image display device, it is easy for a serviceman or the like to replace the intake side filter (73). Such a configuration that enables filter replacement from the back side of the image display device is particularly effective when the image display device is incorporated in another device such as a vending machine.

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

  In the present embodiment, a configuration similar to that of the intake section (3) is also adopted in the exhaust section (4). 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 image 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 illustrating a configuration for notifying filter clogging in the image display device. As shown in FIG. 23, the image display device is responsive to a temperature sensor (81) that acquires temperature information that changes according to the temperature of the liquid crystal display panel (1), and the velocity of the air that flows in the intake section (3). A wind speed sensor (82) that obtains wind speed information that changes, a notification section (83) that notifies clogging of the intake side filter (73), and temperature information and wind speed sensor (82 obtained by the temperature sensor (81). ), A control unit (84) for controlling the notification operation of the notification unit (83) on the basis of the wind speed information acquired by (2), and a memory (85) in which various information is 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 (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 region G 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 image display device is installed at a fixed position indoors or outdoors, when the image display device is first driven, temperature information and wind speed information are respectively obtained by the temperature sensor (81) and the wind speed sensor (82). The information is acquired and 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 image display device, the notification unit (83) can notify that the intake side filter (73) is clogged, that is, that the replacement time of the intake side filter (73) has arrived. 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 service person who often visually recognizes the back surface of the image display device can easily recognize clogging of the intake side filter (73).

  Further, according to the image display device, it is possible to notify the situation 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 image 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 filter (74) and the fan (72) in the inside, and temperature information acquired by the temperature sensor (86) and the wind speed sensor ( The clogging of the exhaust filter (74) may be notified by the notification unit (83) based on the wind speed information acquired by 87). 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.

  In addition, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim. For example, in the above image 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 channel 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 image display device may have a configuration in which only one of the fans (71) and (72) is provided. Further, in the above image 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). May be controlled.

  The various configurations employed in the image display device are not limited to the image display device including a liquid crystal display panel, but include an image display device including various image display panels such as a plasma display panel and an organic EL (Electro-Luminescence) display panel. It can be applied to.

(1) Liquid crystal display panel (image display panel)
(10) Screen
(2) Case
(20) Image display window
(202) Glass plate
(21) Front wall
(22) Back wall
(221) Through hole
(23) Presser bracket
(24) Seal member
(26) Bottom wall
(260) Opening
(261) First groove
(262) Cover member
(264) Raised part
(27) Side wall
(271) Second groove
(3) Air intake part (ventilation part)
(30) Open end
(31) Back
(311) Insertion window
(312) Locking protrusion
(32) Insertion tool
(320) Containment case
(321) Case half
(322) Support
(323) Isobe
(33) Arm
(331) Locking recess
(4) Exhaust part (ventilation part)
(40) Open end
(5) Flow path
(51) First flow path
(52) Intake side flow path
(521) Space
(53) Exhaust side flow path
(531) Space
(54) Second channel section
(61) First flow path forming member
(62) Second flow path forming member
(623) Partition member
(624) Through hole
(71) Fan
(72) Fan
(73) Intake filter
(74) Exhaust side filter
(81) Temperature sensor
(82) Wind speed sensor
(83) Notification unit
(84) Control unit
(85) Memory

Claims (2)

An image display panel and a housing that accommodates the image display panel are provided, and the housing is provided with a ventilation portion that communicates the outside and the inside of the housing, and a plurality of fans are provided in the ventilation portion. An image display device deployed in a predetermined direction,
A flow path that extends from the ventilation portion and reaches the surface of the image display panel is formed inside the housing, and a plurality of channels that lead the flow path from the ventilation portion to the surface of the image display panel are formed in the flow path. An image display device in which a partition member for partitioning is provided, and one space in the flow path corresponds to each fan.   The casing is provided with a second ventilation part that communicates the outside and the inside of the casing, and the flow path reaches the second ventilation part through the screen of the image display panel, The image display device according to claim 1, wherein the partition member partitions a part of the flow path into a plurality of spaces that lead from the ventilation portion to a screen of the image display panel.

Images