Monitor case

Abstract

A monitor that allows you to stably view the image displayed on the screen from the front of the front cover. - Provide a case. [Solution] The monitor case houses a display device equipped with a liquid crystal panel. The case body and the front cover, which is supported by the case body and positioned on the front side of the display unit. The front cover comprises a light-transmitting substrate and the first front surface and the back surface of the substrate. The substrate has a reflection suppression layer formed on both sides of the second surface to suppress light reflection, and the substrate has a first surface and The difference in height dimensions of the unevenness on the second surface is the polarizing plate on the front side of the liquid crystal panel. The reflection suppression layer is formed to be smaller than the dimension of the slit in the short direction of the polarizer. It has multiple protrusions arranged in a direction inclined with respect to the longitudinal direction of the slit.

Description

Technical Field

[0001] The present disclosure relates to a monitor case.

Background Art

[0002] At stations and terminals such as railways and streetcars, in order to confirm the safety of passengers getting on and off, a camera and a display device are installed on the platform. The video captured by the camera is displayed on the display device, and by the crew members such as conductors looking at the display device, it is possible to safely open and close the doors.

[0003] The display device arranged on the platform may be housed in a monitor case. In the monitor case, a front cover is arranged on the front side of the display portion of the display device. Some front covers are provided with an anti-reflection structure for suppressing light reflection (for example, see Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the configuration using the anti-reflection structure described in Patent Document 1, when a liquid crystal panel is used as the display portion, depending on the configuration of the front cover and the positional relationship with the liquid crystal panel, interference may occur between the polarizing plate of the liquid crystal panel, and interference fringes may be formed. In this case, it becomes difficult to stably view the image displayed on the display portion.

[0006] ​​ This disclosure has been made in view of the above, and the image of the display unit from the front of the front cover The objective is to provide a monitor case that allows for stable image viewing. [Means for solving the problem]

[0007] The monitor case relating to this disclosure houses a display device equipped with a display unit having a liquid crystal panel. A case body containing the display unit, and a floor support located on the front side of the display unit, supported by the case body. The front cover comprises a light-transmitting substrate and the front side of the substrate. It has a reflection suppression layer formed on both the first surface and the second surface on the back side to suppress light reflection. The substrate has a difference in the height dimension of the irregularities on the first surface and the second surface, which is the same as the liquid The dimensions of the slits in the front polarizing plate provided in the crystal panel are made smaller than the dimensions in the shorter direction. The reflection suppression layer is formed in such a way that it is inclined with respect to the longitudinal direction of the slit of the polarizing plate. It has multiple protrusions arranged in a directional manner. [Effects of the Invention]

[0008] According to this disclosure, it is possible to stably view the image displayed on the display unit from the front of the front cover. We can provide a suitable monitor case. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 shows an example of a monitor case according to the first embodiment. [Figure 2] Figure 2 shows an example of a monitor case according to the first embodiment. [Figure 3] Figure 3 is a schematic diagram showing an example of a front cover and display unit. [Figure 4A]FIG. 4A is a diagram schematically showing the relationship between the arrangement direction of a plurality of protrusions according to the present embodiment and the extending direction of the slit of the polarizing plate. [Figure 4B] FIG. 4B is a diagram schematically showing the relationship between the arrangement direction of a plurality of protrusions according to the comparative example and the extending direction of the slit of the polarizing plate. [Figure 5] FIG. 5 is a diagram schematically showing an example of a display device according to the second embodiment. [Figure 6] FIG. 6 is a block diagram showing an example of a display device according to the second embodiment. [Figure 7] FIG. 7 is a flowchart showing an example of the operation of a display device according to the second embodiment. [Figure 8] FIG. 8 is a diagram (rear view) schematically showing an example of a monitor case according to the third embodiment. [Figure 9] FIG. 9 is a diagram (top view) schematically showing an example of a monitor case according to the third embodiment. [Figure 10] FIG. 10 is a diagram (side view) schematically showing an example of a monitor case according to the third embodiment. [Figure 11] FIG. 11 is a diagram showing the usage state of a monitor case according to the third embodiment. [Figure 12] FIG. 12 is a diagram showing the usage state of a monitor case according to the third embodiment. [Figure 13] FIG. 13 is a diagram showing the usage state of a monitor case according to the third embodiment. [Figure 14] FIG. 14 is a diagram showing the usage state of a monitor case according to the third embodiment. [Figure 15] FIG. 15 is a diagram showing the usage state of a monitor case according to the third embodiment. [Figure 16] FIG. 16 is a diagram showing the usage state of a monitor case according to the third embodiment. [Figure 17] FIG. 17 is a diagram showing the usage state of a monitor case according to the third embodiment. [Figure 18] FIG. 18 is a diagram showing the usage state of a monitor case according to the third embodiment. [Figure 19] Figure 19 shows the usage state of the monitor case according to the third embodiment. [Modes for carrying out the invention]

[0010] Hereinafter, embodiments of the monitor case, display device, and display method relating to this disclosure will be described based on the drawings. This will be explained. However, this embodiment does not limit the invention. Furthermore, the following... The components in the embodiment may be those that are easily and readily replaceable by a person skilled in the art, or substantially the same. One is included. In this embodiment, when describing the direction, the display device's table The direction in which the indicator is pointed is defined as the front direction (front side), and the opposite side of the front direction is defined as the rear direction (rear side). ) Also, the upper side in the state in which the display device is installed is defined as the upper side (top surface), and the lower side is defined as The downward (bottom side) is defined as the direction perpendicular to the front / back direction and the vertical direction. The side (side) is defined as the direction perpendicular to the front / back direction and the vertical direction. )

[0011] [First Embodiment] Figures 1 and 2 show an example of a monitor case 100 according to the first embodiment. Figure 1 is a view from the front, and Figure 2 shows the configuration along the AA section in Figure 1. The monitor case 100 shown in Figure 2 houses the display device 30. The display device 30 is liquid It has a display unit 31 made of crystal panels. The display unit 31 has a display surface 31a.

[0012] The monitor case 100 and display device 30 are used, for example, at stations and terminals of railways, trams, etc. It will be placed on the platform of the train. The display device 30 will be located near the doors of trains and other vehicles. The video footage of the scene, captured by a camera, will be displayed.

[0013] As shown in Figures 1 and 2, the monitor case 100 consists of a case body 10 and a front case It has a bar 20. Note that in Figure 2, the front side of the monitor case 100 is tilted downwards. This shows the arrangement in a particular state, but the configuration is not limited to this.

[0014] The case body 10 has a monitor housing section 11, a front frame section 12, and a hood section 13. The monitor housing section 11 houses the display device 30. The front frame section 12 houses the monitor It is positioned on the front side of the storage compartment 11 and supports the front cover 20, which will be described later. Hood section 13 It is positioned across the upper and both sides of the front frame section 12. The hood section 13 is, for example, thick The device 30 is shielded from external light, such as sunlight, so that it does not come into contact with it.

[0015] The front cover 20 is positioned on the front side of the display unit 31 and is supported by the front frame 12. Figure 3 is a schematic diagram showing an example of the front cover 20 and the display unit 31.

[0016] As shown in Figure 3, the display unit 31 has a liquid crystal panel 32 and a polarizing plate 33. NEL32 can, for example, manipulate the arrangement of liquid crystal molecules at different timings for each pixel. The light from the backlight is allowed to pass to the front. On the front side of the LCD panel 32, for example, Optical elements such as a light plate 33 and a phase plate (not shown) are arranged. The polarizing plate 33 extends in one direction Multiple slits 34 are arranged. Light that passes through the layer of liquid crystal molecules is directed towards optical elements such as polarizers 33. The light is dimmed by the child, and the dimmed light forms an image.

[0017] The front cover 20 has a substrate 21 and a reflection suppression layer 22. The substrate 21 is, for example, rectangular It has a certain shape. The substrate 21 transmits light, such as display light from the display unit 31. The substrate 21 has a first surface 21a on the front side and a second surface 21b on the back side. The difference in dimensions T1 and T2 in the height direction of the unevenness on the second surface 21b is the slit of the polarizing plate 33. It is formed to be smaller than the dimension W in the short direction of T34.

[0018] The reflection suppression layer 22 is formed on both the first surface 21a and the second surface 21b of the substrate 21. The reflection suppression layer 22 suppresses light reflection. The reflection suppression layer 22 has multiple protrusions on the film 23. The configuration consists of 24 arranged in a regular high-low arrangement. The multiple protrusions 24 control the angle of light reflection. This design suppresses reflection by controlling and allowing light to pass through.

[0019] Figure 4A shows the arrangement direction of the multiple protrusions 24 according to this embodiment and the slit 34 of the polarizing plate 33. This figure schematically shows the relationship with the direction of extension. Figure 4B shows multiple protrusions 2 in a comparative example. This diagram schematically shows the relationship between the arrangement direction of 4A and the direction in which the slit 34A of the polarizing plate 33A extends. As shown in Figure 4A, the regular high and low arrangement of the multiple protrusions 24 is the polarizing plate 33. The multiple protrusions 24 are arranged in a direction D2 that is inclined with respect to the longitudinal direction D1 of the lid 34. The angle between the column direction D2 and the longitudinal direction D1 of the slit 34 can be, for example, 45°. can.

[0020] When the front cover 20 having the reflection suppression layer 22 is placed on the front side of the display unit 31, The slit 34 of the polarizing plate 33 positioned in the indicator section 31 and the multiple protrusions 24 of the reflection suppression layer 22 and are arranged with similar dimensions. The irregularities on the first surface 21a and the second surface 21b of the substrate 21 If the difference in height is large, between the multiple protrusions 24 and the slit 34 of the polarizing plate 33 Interference occurs, and interference fringes are generated in the direction of the arrangement of the slits 34. Also, as shown in Figure 4B In the reflection suppression layer 22A, the arrangement direction of the multiple protrusions 24A is aligned with the longitudinal direction of the slit 34A. When aligned with the direction of light, interference fringes become more visible.

[0021] In contrast, in this embodiment, the substrate 21 has a first surface 21a and a second surface 21b The difference in dimensions T1 and T2 in the height direction of the uneven surface is the dimension in the short direction of the slit 34 of the polarizing plate 33. It is formed to be smaller than the ratio W. Also, the regular height and height arrangement of the multiple protrusions 24 The slits 34 are arranged in a direction inclined with respect to their longitudinal direction. This suppresses the generation of interference fringes. It can control interference, and even if interference fringes occur, they can be made less visible.

[0022] As described above, the monitor case 100 according to this embodiment has a liquid crystal panel 32. A case body 10 that houses a display device 30 provided with a display unit 31, and a support provided in the case body 10 The display unit 31 is positioned on the front side of the front cover 20, and the front cover 20 is a light-transmitting substrate 21, and the first surface 21a on the front side and the second surface on the back side of the substrate 21 The substrate 21 has a reflection suppression layer 22 formed on both sides of 21b to suppress light reflection, and the substrate 21 is The difference in the height dimension of the irregularities on surface 1 21a and surface 21b is provided in the liquid crystal panel 32. The shape is such that it is smaller than the dimension in the shorter direction of the slit 34 of the polarizing plate 33 on the front side that is being cut. The reflection suppression layer 22 is formed in a direction inclined with respect to the longitudinal direction of the slit 34 of the polarizing plate 33. It has multiple arranged protrusions 24.

[0023] According to this configuration, the front cover 20 suppresses reflection while generating interference fringes. This can suppress interference, making it less visible even if interference fringes occur. This means that when the front cover 20 is positioned on the front side of the display unit 31 of the display device 30, Therefore, the image displayed on the display unit 31 can be viewed stably from the front of the front cover 20. ru.

[0024] In the monitor case 100 according to this embodiment, the front cover 20 is a display unit 31 It is positioned in a direction along the display surface 31a. With this configuration, the front cover 20 is positioned on the front By being positioned in a direction along the indicator surface 31a, the dimensions of the monitor case 100 in the front-to-back direction are It can suppress the law.

[0025] In the monitor case 100 according to this embodiment, the regular height and height arrangement of the multiple protrusions 24 The rows are arranged in a direction inclined at 45° with respect to the longitudinal direction of the slit 34. With this configuration This makes it possible to more reliably suppress the generation of interference fringes in the front cover 20.

[0026] [Second Embodiment] Figure 5 is a schematic diagram showing an example of the display device 130 according to the second embodiment. Figure 6 is This is a block diagram showing an example of the display device 130 according to the second embodiment. Figures 5 and 6 are shown. The display device 130, like the display device 30 in the first embodiment, is used for railways, trams, etc. It is placed on the platforms of stations and terminals. In this embodiment, the display device 130 Stations and terminals where these are located are equipped with entry sensors 140 to detect the arrival of trains. The wire entry sensor 140 outputs the detection result to the control unit 134, which will be described later. Display device 130 The device consists of a display unit 131, a display unit 132, an illuminance sensor 133, a control unit 134, and It has a memory unit 135. The display device body 131 is housed in a monitor case 200.

[0027] The monitor case 200 has a case body 110 and a front cover 120. The main body 110 houses the display device 130. The front cover 120 is the display unit 132. It is positioned on the front side. The front cover 120 has an anti-reflective layer 122 on its surface. The front cover 120 has a configuration similar to, for example, the front cover 20 described in the first embodiment. That's fine.

[0028] The illuminance sensor 133 is located inside the monitor case 200. The illuminance sensor 133 detects the illuminance inside the monitor case 200. The system detects the illuminance at a specific time or predetermined interval and outputs the detection result to the control unit 134. do.

[0029] The control unit 134 comprehensively controls the operation of the display device 130. The control unit 134 is a CPU Processing units such as the Central Processing Unit and RAM (Random Accessory) (DOM Access Memory) or ROM (Read Only Memory) It has a storage device such as ).

[0030] The control unit 134 includes an illumination processing unit 136 and a display control unit 137. 6 acquires the detection result from the wire entry sensor 140. In addition, the illuminance processing unit 136 acquires the illuminance sensor The detection result is obtained by sensor 133. The illumination processing unit 136 receives the information that the arrival of a train has been detected. If a detection result is obtained, at the first time point prior to the time when the train entry was detected, The detection result of the illuminance sensor 133 and the illuminance sensor at a second time point after the time of wire entry detection. Calculate the difference from the detection result for SA133.

[0031] The display control unit 137 controls the display operation of the display unit 132. The display control unit 137 controls the wire entry. The detection result from sensor 140 is acquired. The display control unit 137 detects that a train has entered the station. If no detection result is obtained, the display unit 132 is put into standby mode. This includes a state in which the power of 130 is turned on while the brightness of the display unit 132 is set to a lower level than a predetermined brightness. Hmm. The standby state is achieved by keeping the power of the display device 130 on and setting the brightness of the display unit 132 to 0. This includes the state. The standby state also includes a brightness suppression state in which the brightness of the display unit 132 is suppressed.

[0032] When the display control unit 137 obtains a detection result indicating that a train has entered the station, it displays The unit 132 is set to display mode. The display mode is such that a predetermined image can be properly viewed on the display unit 132. This is the display state that has been set. Also, the image output state is the brightness suppression of the display unit 132 as described above. This includes the state where the brightness suppression is deactivated. A predetermined image is, for example, a train station platform. Examples include images and videos captured by cameras installed in the room.

[0033] The display control unit 137 determines the display state based on the measurement results of the illuminance sensor 133. The brightness of section 132 is controlled. The display control unit 137 calculates, for example, the brightness of section 136. Based on the difference, the brightness of the display unit 132 in the image output state can be controlled. In this case, if the difference is greater than or equal to a predetermined value, the display control unit 137 will determine the first time point. The brightness of the display unit 132 in the display state is controlled based on the detection result of the temperature sensor 133. Furthermore, if the difference is less than a predetermined value, the detection result of the illuminance sensor 133 at the second time point is used. The brightness of the display unit 132 in the display state is controlled based on this.

[0034] The memory unit 135 stores various types of information. The memory unit 135 stores, for example, a hard disk drive. It has storage such as a solid-state drive. External storage media such as removable disks may be used. The storage unit 135 is, for example, The storage unit 135 stores a value that is set in advance as the brightness of the display unit 132. The brightness is stored in association with, for example, the illuminance value at the location where the illuminance sensor 133 is installed. do.

[0035] Next, an example of the operation of the above-mentioned display device 130 will be described. It is installed on the station platform. In the display device 130, if a train has not yet arrived at the platform, the display device will not necessarily... There is no need to display the image on 130. Therefore, the display control unit 137 does not need to display the input sensor 140. If the arrival of a train is not detected, the display unit 132 will be set to standby mode. The SA133 detects illuminance continuously or at predetermined intervals and stores the detection results. Store in section 135.

[0036] On the other hand, when a train arrives at the platform, the display device 130 will display an image. For example, a conductor or station staff member can check the safety of passengers boarding and alighting while looking at the display device 130. This allows for safe opening and closing of doors, etc. Therefore, the display control unit 137 is located at the cable entry center. When the arrival of a train is detected by the SA 140, the display unit 132 is switched from standby to display state. Replace. This control allows the video footage taken on the platform to be displayed on the display unit 132. ru.

[0037] Furthermore, when the train entry sensor 140 detects the arrival of a train, the illumination processing unit 136 will The detection result of the illuminance sensor 133 at the first time point prior to the time when the entry of the railway was detected. The difference between the result and the detection result of the illuminance sensor 133 at a second time point, which is after the time of wire entry detection. Calculate.

[0038] If the illumination of the station platform is low at the first point in time, the display light of the display unit 132 will be low This has a significant impact on the detection results of sensor 133. Therefore, the illuminance at the first time point... The difference between the detection result of sensor 133 and the detection result of illuminance sensor 133 at the second time point is large. Therefore, in this case, the display control unit 137 determines the illuminance sensor 13 at the first time point. Based on the detection result from step 3, the brightness of the display unit 132 in the display state is controlled.

[0039] On the other hand, if the illumination of the station platform is high at the first time point, the display light of the display unit 132 This reduces the influence on the detection result of the illuminance sensor 133. Therefore, at the first time point The difference between the detection result of the illuminance sensor 133 and the detection result of the illuminance sensor 133 at the second time point. The illuminance sensor at the second time point becomes smaller. Therefore, in this case, the display control unit 137 determines the illuminance sensor at the second time point. Based on the detection result of SA 133, the brightness of the display unit 132 in the display state is controlled.

[0040] For example, the display control unit 137 uses the correspondence between illuminance and brightness stored in the memory unit 135. Therefore, the brightness corresponding to the illuminance value corresponding to the detection result is set in the display unit 132 in the display state. It can be set as a brightness level.

[0041] This control system adjusts the platform illumination according to the conditions when the train is not in operation and when it is in operation. The brightness of the display unit 132 is set accordingly, so in any case the display unit 132 is easy to see. The display unit 132 is put into standby mode when the train is not in operation. Power consumption will be reduced by 130.

[0042] Figure 7 is a flowchart showing an example of the operation of the display device 130 according to the second embodiment. As shown in Figure 7, the display control unit 137 puts the display unit 132 of the display device 130 into a standby state. (Step S101). The illuminance sensor 133 measures the illuminance inside the monitor case. Detect (step S102). In the control unit 134, the display control unit 137 detects the entry sensor Based on the detection results of Sa 140, it is determined whether or not the arrival of a train has been detected (Step S1 03).

[0043] If it is determined that no train is entering the station (No. in step S103), the display control unit 1 Process 37 repeats the process in step S102.

[0044] If it is determined that a train is approaching (Yes in step S103), the display control unit 1 37 sets the display unit 132 of the display device 130 to an image output state (step S104). In addition, the illuminance processing unit 136 determines the illuminance sensor 133 at a first time point prior to the time of wire entry detection. The detection result and the detection result of the illuminance sensor 133 at a second time point after the time of track entry detection. Calculate the difference (step S105).

[0045] If the calculated difference is greater than or equal to a predetermined value, the display control unit 137 will (step S106) Yes), based on the detection result of the illuminance sensor 133 at the first time point, in the image output state The brightness of the display unit 132 is controlled (step S107). Meanwhile, the calculated difference is a predetermined value If it is less than (No. of step S106), the illuminance sensor 133 at the second time point Based on the detection result, the brightness of the display unit 132 in the image output state is controlled (step S10 8).

[0046] The display control unit 137 determines whether or not a train has departed from the platform (step S 109) If it is determined that no train has departed from the platform (Step S109) The process from step S105 onwards is repeated. Meanwhile, the display control unit 137 If it is determined that the train has departed from the platform (Yes in step S109), the display unit Switch 132 from display state to standby state (step S110). Then, the display control unit. 137 determines whether or not to terminate the operation of the display device 130 (step S111), and terminates. If it is determined that it will not be done (No. in step S111), the process from step S102 onwards is repeated. The return operation is performed. The display control unit 137 determines that the operation of the display device 130 has ended (STE) If you select Yes (S111), the process will be terminated.

[0047] As described above, the display device 130 according to this embodiment is placed on the station platform, A display device body 131 having a display unit 132 and housed in a monitor case 200, and a monitor - An illuminance sensor 133 located inside the case 200 and an entry sensor that detects the arrival of a train If the arrival of a train is not detected by the Sa 140, the display unit 132 will be set to standby mode. When the sensor 140 detects the arrival of a train, the display unit 132 is set to display an image. Both systems control the brightness of the display unit 132 in the display state based on the measurement results of the illuminance sensor 133. It includes a control unit 134.

[0048] The display method according to this embodiment is arranged on the station platform and has a display unit 132, A display method using a display device 130 housed in a monitor case 200, wherein the monitor case - 200 detects the illuminance inside and the entry sensor 14 detects the arrival of a train. If the train's arrival is not detected due to a value of 0, the display unit 132 will be set to standby mode, and the train's arrival When the sensor 140 detects the arrival of a train, the display unit 132 is set to display an image. Furthermore, when the display unit 132 is set to display an image, the illuminance inside the monitor case 200 This includes controlling the brightness of the display unit 132 in the display state based on the measurement results.

[0049] According to this configuration, the illuminance sensor 133 is detected when the train is entering the station and when it is not entering the station. The brightness of the display unit 132 is set according to the measurement results, so in any case the display The unit 132 will be in a more visible state. Also, the display unit 132 will be set to a standby state when not in use. This reduces the power consumption of the display device 130.

[0050] In the display device 130 according to this embodiment, the control unit 134 detects when a train is entering the station. In this case, the illuminance sensor 133 at the first time point prior to the time when the entry of a train was detected The detection result and the detection result of the illuminance sensor 133 at a second time point after the time of track entry detection. The system calculates the difference and controls the brightness of the display unit 132 in the display state based on the calculated difference. According to this configuration, the detection result of the illuminance sensor 133 at the first time point and the second time point Based on the difference with the detection result of the illuminance sensor 133, the brightness of the display unit 132 in the display state This is set. This makes it possible to make the display unit 132 more clearly visible. .

[0051] In the display device 130 according to this embodiment, the control unit 134 determines that the difference is greater than or equal to a predetermined value. In this case, the display state is determined based on the detection result of the illuminance sensor 133 at the first time point. The brightness of the indicator unit 132 is controlled, and if the difference is less than a predetermined value, the illuminance at the second time point is controlled. Based on the detection result of sensor 133, the brightness of the display unit 132 in the display state is controlled. According to the configuration, the platform's illumination and the slight reflection from the image displayed on the monitor are the factors at play. The brightness of the display unit 132 can be set with high precision according to the state.

[0052] In the display device 130 according to this embodiment, the control unit 134 is in a standby state, display device With the power to the main unit 131 still on, the brightness of the display unit 132 is set to a level lower than a predetermined brightness. This configuration makes it possible to more reliably suppress the power consumption of the display device 130 when it is not in operation. It is possible.

[0053] [Third Embodiment] Figures 8 to 10 schematically show an example of a monitor case 300 according to the third embodiment. Figure 8 shows the view from the rear, Figure 9 shows the view from the top, and Figure 10 shows the view from the side. This indicates that.

[0054] As shown in Figures 8 to 10, the monitor case 300 consists of a case body 210 and a fluorocarbon It includes a toe cover 220 and a sliding mechanism 230.

[0055] The case body 210 houses the display device 240. The back of the case body 210 is Screw holes 210a are provided for fixing the device 240. The case body 210 is frame It has a frame 211. The frame 211 is positioned on the front side of the front cover 220.

[0056] The case body 210 has a protective coating on the part of the frame 211 that faces the front cover 220. It has a water gasket 212. The frame 211 and the waterproof gasket 212 are connected to the display device 240. The portion located at the display unit 241 is open.

[0057] The front cover 220 is supported by the case body 210 and the sliding mechanism 230. The front cover 220 covers the front side of the display unit 241 of the display device 240. 220 is pressed against the waterproof packing 212 by the sliding rod 231, which will be described later. It is retained.

[0058] The sliding mechanism 230 is, for example, slidable vertically relative to the case body 210. It has a sliding rod 231 and a guide portion 232.

[0059] The sliding rod 231 is located on the side edges 221 of the front cover 220. A pair of sliding rods 231 are positioned at the corresponding locations. The pair of sliding rods 231 are located at the upper connecting portion 233 and the lower It is connected by a connecting portion 234. The lower connecting portion 234 supports the lower part of the front cover 220. The pair of sliding rods 231 are slidable as a single unit. It is rotatable about an axis of rotation parallel to the sliding direction. The sliding rod 231 has a cross-section The shape is elliptical or oblong (see Figure 9).

[0060] The sliding rod 231 is located in the front-to-rear direction, and the rear portion 232 of the guide portion 232, which will be described later. It is positioned between c and the side edge 221 of the front cover. The slide rod 231 is in a rotational position By adjusting the front cover 220 on the long axis side, the frame 2 of the case body 210 The fixed state is when it is pressed against 11 and fixed in place, and the fixed state is when the long axis side is separated from the front cover 220. The open state allows for the release of the front cover 220, and the maintenance state allows for the maintenance of the front cover 220. It is possible to switch between the fixed state and the extended state. In the fixed state, the slide rod 231 is at the rear end on the long axis side. The part presses against the rear part 232c, and the front end on the long axis side presses against the front cover 220 and the frame 211 Press to the side.

[0061] The sliding rod 231 has a lever 231a bent into an L shape at its upper end in the sliding direction. It has. In addition, the slide rod 231 has an L-shaped hook 231b at its lower end in the sliding direction. When viewed from above, the lever 231a and the hook 231b are positioned at a 90° angle. It gets kicked.

[0062] When the slide rod 231 is in the open position, the lever 231a is positioned to protrude rearward. It is placed there. Also, when the slide rod 231 is in the open state, the hook 231b is in the lateral direction It is positioned to protrude outward. In this embodiment, the hook 231b is positioned outward in the lateral direction. The protruding position is the retracted position, which is the position after moving away from the holding position.

[0063] When the sliding rod 231 is fixed, the lever 231a protrudes inward in the lateral direction. They are arranged in such a way. Also, when the sliding rod 231 is in a fixed state, the hook 231b is It is positioned to protrude to the rear. In this embodiment, the hook 231b protrudes to the rear. The position is the retracted position, which is the position after moving away from the holding position.

[0064] When the slide rod 231 is in the maintenance state, the lever 231a moves outward in the lateral direction. It is positioned to protrude. Also, when the slide rod 231 is in a maintenance state, The buck 231b is positioned to protrude forward. In this embodiment, the protruding forward The position is a retaining position that can hold the front cover 220.

[0065] The guide section 232 guides the sliding movement of the slide rod 231. The guide section 232, It has an inner portion 232a, an outer portion 232b, and a back portion 232c. The inner portion 232a is It is positioned laterally inward relative to the slide rod 231. The outer part 232b is located on the slide rod 2 It is positioned laterally outward relative to 31. The rear portion 232c is positioned relative to the slide rod 231. It is located on the back side. The guide part 232 has an inner part 232a, an outer part 232b, and a back part 232c is provided so that its cross-sectional shape is U-shaped.

[0066] The guide section 232 is the first slit 236a, the second slit 236b and the third slit 2 It has 36c. The first slit 236a is provided on the back portion 232c along the sliding direction. The width (lateral) dimension of the first slit 236a is the lever of the slide rod 231. The 231a is formed to be retractable. When the slide rod 231 is in the open position, it protrudes rearward. The lever 231a is inserted into the first slit 236a. Therefore, the slide rod 231 This allows for smooth sliding.

[0067] The second slit 236b is one end of the first slit 236a in the sliding direction (in this embodiment) The second slit 236b is provided at the upper end. The second slit 236b extends from the back portion 232c to the inner portion 232a From the first slit 236a, at least one side (in this embodiment, the inside) It extends to the back portion 232c and the inner portion 232a and The outer portion 232b has a shape that extends laterally from the first slit 236a to both sides. It may be there. The second slit 236b is made so that the lever 231a of the slide rod 231 can pass through. It is provided. The second slit 236b houses the lever 231a of the slide rod 231. When the slide rod 231 is fixed, the second slit 236b protrudes inward on the side. The lever 231a is stored. The lever 231a is stored in the second slit 236b. Therefore, the lever 231a and the guide portion 232 are locked in the vertical direction. The descent of the 231 pole is prevented.

[0068] The third slit 236c is the other end of the first slit 236a in the sliding direction (in this embodiment) The third slit 236c is located at the lower end. The third slit 236c extends from the back portion 232c to the outer portion 232b. Extending from the first slit 236a to one side (outward in this embodiment) The third slit 236c is provided so that the lever 231a of the slide rod 231 can pass through it. The third slit 236c houses the lever 231a of the slide rod 231. When rod 231 is in a maintenance state, the third slit 236c protrudes outward to the side. The lever 231a is stored. The lever 231a is stored in the third slit 236c. Therefore, the lever 231a and the guide portion 232 are locked in the vertical direction. The drop of rod 231 is prevented.

[0069] Next, an example of how to use the monitor case 300 configured as described above will be explained. (Figure) Figures 11 to 19 show the usage state of the monitor case 300 according to the third embodiment. When housing the display device 240, the display device 240 is placed inside the case body 210. In this state, the front is connected via a screw member (not shown) through the screw hole 210a on the back of the case body 210. The indicator device 240 is fastened.

[0070] After fastening the display device 240, attach the front cover 220. Front cover 22 When installing 0, as shown in Figures 8 and 10, the lever 231a is in the first slit 236a A pair of sliding rods 231 are positioned at the lower end of the [unclear]. In this state, Figures 11 and 12 are shown. As shown in 12, each slider is designed so that the lever 231a is stored in the third slit 236c. Adjust the rotational position of the slide rod 231. This adjustment allows each slide rod 231 to be maintained. This is the state in which each slide rod 231 enters the maintenance state, and hook 231b It is positioned in a holding position that protrudes forward. In this state, the front cover is attached to the lower connecting part 234. By placing -220, the hook 231b can hold the front side of the front cover 220. Therefore, when performing the necessary work on the front cover 220, the front cover 2 This prevents the detachment of part 20. Note that the slide rod 231 is not in a maintenance state, but is left open. Alternatively, the front cover 220 may be placed on the lower connecting portion 234.

[0071] Place the front cover 220 on the lower connecting section 234, or after performing the necessary work, As shown in Figures 8 and 10, the lever 231a is stored in the first slit 236a. The rotational position of each slide rod 231 is adjusted. The lever 231a is in the first slit 236a. When retracted, each slide rod 231 is in an open state. In this configuration, the hook 231b is positioned in a retracted position, protruding laterally outward.

[0072] The lever 231a is stored in the first slit 236a, and each slide rod 231 is opened. Then, as shown in Figures 13 and 14, each slide rod 231 is pushed up. Each slide rod 231 rises so that the lever 231a is aligned with the first slit 236a. As the lever 231a rises to the upper end of the first slit 236a, Figure 15 and As shown in Figure 16, the front cover 220 is positioned in front of the display unit 241 of the display device 240. It is placed.

[0073] After lever 231a reaches the upper end of the first slit 236a, as shown in Figures 17 and 18. So that the lever 231a is stored in the second slit 236b, each slide rod 2 Adjust the rotational position of 31. The lever 231a is stored in the second slit 236b. Thus, each slide rod 231 is fixed in place. In this way, the second slit 236b is provided. This allows the slide rod 231 to rotate without interfering with the guide section 232. Also, when the lever 231a is stored in the second slit 236b, the guide section 23 Since it is locked to the rear part 232c of 2, the sliding rod 231 can be prevented from descending.

[0074] As each slide rod 231 is fixed, as shown in Figure 19, the slide rod 231 One of the long axis sides presses the front cover 220 against the waterproof packing 212 of the frame 211. This results in the front cover 220 being fixed to the frame 211. In this case, the other end of the long axis of the slide rod 231 is backed by the back portion 232c of the guide portion 232. It is supported from the surface side. Also, the other end of the long axis of the slide rod 231 is the first slit It will be in a state of being fitted into T236a. Therefore, the rotational position of the slide rod 231 will be shifted. It can be suppressed. Furthermore, when the sliding rod 231 is fixed, the hook 231b moves backward. Move to a protruding position. By fixing the slide rod 231 in this way, the display device The installation of the base 240 and front cover 220 is complete.

[0075] The monitor case 300 and display device 240 are intended for long-term use and will require maintenance as needed. Maintenance is required. This maintenance includes replacing the front cover 220. Replacing the front cover 220 involves removing the front cover 220 and the front cover This includes the installation of part 220. For the installation of the front cover 220, please refer to the above instructions. It is usable. The following describes the procedure for removing the fixed front cover 220. I will reveal it.

[0076] In this case, from the state shown in Figures 17 and 18, the second S The lever 231a, which is stored in lit 236b, is stored in the first slit 236a. The rotational position of each slide rod 231 is adjusted. The lever 231a is positioned in the first slit 236a. When retracted, each slide rod 231 is in an open state. When this state is reached, the fixing of the front cover 220 is released. The cover 220 is supported by the lower connecting portion 234. Also, each slide rod 231 is open. In this configuration, the hook 231b, which was positioned to protrude to the rear, protrudes to the side. Move to the new position.

[0077] From this state, pull each slide rod 231 downwards. Each slide rod 231 is a lever -231a is guided by the guide section 232 and descends along the first slit 236a. When lever 231a reaches the lower end of the first slit 236a, the front cover 220 Remove it and install the new front cover 220. This will replace the front cover 2 The replacement of 20 is completed. Note that, as shown in Figures 11 and 12, the slide rod 231 As part of the maintenance, you may perform the necessary work on the front cover 220. After that, Similarly to the above, the lever 231a is stored in the first slit 236a, and the lever 231a is the first Raise each slide rod 231 so that it is positioned at the upper end of the slit 236a, and each slide The rod 231 is fixed in place. This completes the installation of the front cover 220.

[0078] As described above, the monitor case 300 according to this embodiment has a display unit 241 A monitor case 300 for housing the device 240, having a frame 211 on the front side. A case body 210 and a frame that can slide relative to the case body 210 in a predetermined sliding direction. The ride mechanism 230 and the slide mechanism 230 cause the side edges 221 on both sides in the lateral direction to form a frame. Supported by 211, it is housed in the case body 210 and covers the front side of the display unit 240. The front cover 220 is equipped with a sliding mechanism 230, and the sliding mechanism 230 is located on the side edge 2 of the front cover 220. Positioned in the location corresponding to 21, and rotatable about an axis of rotation parallel to the sliding direction A pair of sliding rods 231 and a guide provided on the case body 210 for the pair of sliding rods 231. It has a guide section 232, and a pair of slide rods 231 are located on the side edge of the front cover 220. It is positioned on the back side of part 221, has an elliptical or oblong cross-sectional shape, and adjusts the rotational position. This allows the front cover 220 to be pressed against the frame 211 on the long axis side and secured. The fixed state is released by separating the long axis side from the front cover 220. It is replaceable.

[0079] According to this configuration, the rotational position of the pair of slide rods 231 can be adjusted to a fixed state and an open state. By switching between these two modes, the installation and removal of the front cover 220 can be made easier. This is possible. Also, the pair of slide rods 231 can be slid relative to the case body 210 in the sliding direction. By mounting it, maintenance can be performed at a distance from the installation location of the monitor case 300. Maintenance can be performed. This reduces the burden of maintenance work on the front cover 220. This can reduce the burden.

[0080] In the monitor case 300 according to this embodiment, the guide portion 232 is a sliding rod 23 The inner portion 232a is located on the inner side of 1 in the lateral direction, and the outer side of the slide rod 231 in the lateral direction The outer part 232b is placed on the back side of the slide rod 231, and the back part 232c is placed on the back side of the slide rod 231. It has a U-shaped cross-section, and the pair of slide rods 231 are shaped in the front-to-back direction. It is positioned between the rear portion 232c of the side portion 232 and the side edge portion 221 of the front cover 220. In this configuration, the guide section 232 has the function of guiding the slide rod 231, and slide This also serves the function of supporting the rod 231 from the rear side when pressing it against the front cover 220. It can be configured to include such features.

[0081] In the monitor case 300 according to this embodiment, the case body 210 is a frame 21 One of the parts of the front cover 220 that faces the side edge 221 has a waterproof packing 212. The front cover 220 is sealed by the rotation of a pair of sliding rods 231, which seals the waterproof packing 212 It is pressed against it. According to this configuration, moisture will enter the inside of the monitor case 300. It can suppress and.

[0082] In the monitor case 300 according to this embodiment, the pair of sliding rods 231 are The upper end of the guide section 232 has a bent lever 231a, and the back portion 232c This includes a first slit 236a provided along the sliding direction through which the lever 231a can pass, and , provided at one end in the sliding direction of the first slit 236a and laterally from the first slit 236a A second slit 236b extending to at least one side through which the lever 231a can pass, and the first A slit is provided at the other end in the sliding direction of the slit 236a, and extends laterally from the first slit 236a. It also has a third slit 236c that extends to the other side and through which the lever 231a can pass, The pair of sliding rods 231 move the lever 231a to the second slit by adjusting its rotational position. It can be stored in 236b or the third slit 236c. According to this configuration, lever 231 By storing a in the second slit 236b and the third slit 236c, lever 231a The slide rod 231 and the guide portion 232 are locked in the sliding direction. The relative movement in the sliding direction between part 232 and the slide rod 231 can be restricted. It can move without interfering with the id section 232.

[0083] In the monitor case 300 according to this embodiment, the pair of sliding rods 231 have lower ends It has an L-shaped hook 231b, and by adjusting the rotation position, it can be set to a fixed state and an open state. It can be set to different maintenance states, and in the maintenance state, hook 231b It is positioned in a holding position that can hold the lower end of the front cover 220, and is fixed and open. In this configuration, the hook 231b is provided to retract from the holding position. Maintenance can be performed with the front cover 220 supported by the slide rod 231. can.

[0084] The technical scope of the present invention is not limited to the embodiments described above, and the invention does not depart from the spirit of the present invention. You can make changes as appropriate within a reasonable range. [Explanation of Symbols]

[0085] 10, 110, 210...Case body, 11...Monitor compartment, 12...Front frame, 1 3...Hood section, 20, 120, 220...Front cover, 21...Circuit board, 21a...First surface, 21b...Second surface, 22...Anti-reflective layer, 23...Film, 24...Protrusion, 30,130,2 40...Display device, 31, 132, 241...Display unit, 31a...Display surface, 32...Liquid crystal panel, 33...Polarizing plate, 34...Slit, 100, 200, 300...Monitor case, 131...Front Display device body, 133...Illuminance sensor, 134...Control unit, 135...Storage unit, 136...Illuminance processing Section 137...Display control unit, 140...Input sensor, 210a...Screw hole, 211...Frame, 212...Waterproof gasket, 221...Side edge, 230...Sliding mechanism, 231...Sliding rod, 231a...Lever, 231b...Hook, 232...Guide part, 232a...Inner part, 232b ...Outside part, 232c...Back part, 233...Upper connecting part, 234...Lower connecting part, 236a...No. Slit 1, 236b...Slit 2, 236c...Slit 3

Claims

1. A light-transmitting substrate, A reflection suppression layer is formed on both the first surface on the front side and the second surface on the back side of the substrate to suppress light reflection. It has, The substrate is formed such that the difference in the height dimension of the irregularities on the first surface and the second surface is smaller than the dimension in the short-side direction of the slit of the polarizing plate on the front side provided in the liquid crystal panel. The reflection suppression layer has a plurality of protrusions arranged in a direction inclined with respect to the longitudinal direction of the slit of the polarizing plate. Front cover.

2. The arrangement is in a direction along the display surface of the liquid crystal panel. The front cover according to claim 1.

3. The regular arrangement of heights of the multiple protrusions is arranged in a direction inclined at 45° with respect to the longitudinal direction of the slit. The front cover according to claim 1 or claim 2.

Images