Indication device

Abstract

To provide a display device with improved reliability. [Solution] The display device 100 used in the aircraft 1 comprises a display module 101 having a display panel 120 for displaying an image on its front, a housing 150 facing the back surface 105 of the display module 101 and supporting the display module 101, a first adhesive member 210, and a second adhesive member 250. The first adhesive member 210 connects the peripheral edge 106 of the back surface 105 to the housing 150. The second adhesive member 250 connects the central portion 108, which is the area inside the peripheral edge 106 of the back surface 105, to the housing 150. When viewed from the front or rear direction, the first adhesive member 210 and the second adhesive member 250 are spaced apart around the entire circumference of the second adhesive member 250.

Description

Technical Field

[0001] The present disclosure relates to a display device.

Background Art

[0002] Patent Document 1 discloses an electronic device including a flexible display, a housing, and a back plate. The flexible display has a first surface including a display screen and a second surface located on the opposite side. The back plate is located between the flexible display and the back wall of the housing. The back plate is attached to the second surface of the flexible display and fixed to the back wall of the housing by, for example, a double-sided tape, an adhesive, or other methods. The back plate has a frame portion and a beam portion. The frame portion is formed in a rectangular frame shape having four side portions and supports the peripheral portion of the flexible display. The beam portion extends between the side portions of the two long sides of the frame portion and supports the central portion of the flexible display.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the conventional electronic devices described above, a wide area of ​​the flexible display, including its periphery and center, is continuously attached to the backplate with double-sided tape or the like. Therefore, for example, a relatively large area of ​​double-sided tape corresponding to the size of the flexible display is required. Furthermore, if the double-sided tape corresponding to the periphery of the flexible display and the double-sided tape corresponding to the center of the flexible display are separated, peeling of the double-sided tape is likely to occur at the boundary between these two tapes due to dimensional tolerances such as the thickness of the two tapes. In particular, since aircraft are prone to unexpected large tremors, it is desirable that display devices used in aircraft have high resistance to vibration or shock.

[0005] This disclosure was made by the inventors of the present application focusing on the above-mentioned problems, and provides a display device with improved reliability. [Means for solving the problem]

[0006] A display device according to one aspect of the present disclosure is a display device used in an aircraft, comprising: a display module having a display panel for displaying an image on its front surface; a housing facing the back surface of the display module and supporting the display module; a first adhesive member connecting the peripheral edge of the back surface to the housing; and a second adhesive member connecting the central portion, which is the area inside the peripheral edge of the back surface, to the housing, wherein the first adhesive member and the second adhesive member are spaced apart around the entire circumference of the second adhesive member when viewed from the front-rear direction. [Effects of the Invention]

[0007] According to this disclosure, a display device with improved reliability can be provided. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 shows an example of the arrangement of multiple display devices according to the embodiment. [Figure 2] Figure 2 is a perspective view showing the external appearance of a display device according to an embodiment. [Figure 3] Figure 3 is an exploded perspective view of a display device according to an embodiment. [Figure 4] Figure 4 is a cross-sectional view showing the mounting structure of the display module to the housing according to the embodiment. [Figure 5A] Figure 5A is a rear view showing the configuration of the back of the display module according to the embodiment. [Figure 5B] Figure 5B is a front view showing an example of the layout of the first adhesive member and the second adhesive member according to the embodiment. [Figure 6] Figure 6 is an exploded perspective view showing an enlarged portion of the first adhesive member according to the embodiment. [Figure 7] Figure 7 is an exploded perspective view of a modified display device according to the embodiment. [Figure 8] Figure 8 is a cross-sectional view showing a mounting structure for a display module to a housing according to a modified embodiment. [Modes for carrying out the invention]

[0009] A display device according to a first aspect of the present disclosure is a display device used in an aircraft, comprising: a display module having a display panel for displaying an image on its front surface; a housing facing the back surface of the display module and supporting the display module; a first adhesive member connecting the peripheral edge of the back surface to the housing; and a second adhesive member connecting the central portion, which is the area inside the peripheral edge of the back surface, to the housing, wherein the first adhesive member and the second adhesive member are spaced apart around the entire circumference of the second adhesive member when viewed from the front-rear direction.

[0010] According to the display device of the first embodiment described above, the peripheral edge of the back of the display module and the housing are connected by a first adhesive member, thereby suppressing the intrusion of foreign matter such as dust or liquid into the interior of the display module from the peripheral edge. Furthermore, the central part of the back of the display module and the housing are connected by a second adhesive member, thereby ensuring the connection strength between the display module and the housing. Moreover, the first and second adhesive members are spaced apart around the entire circumference of the second adhesive member. As a result, dimensional tolerances of the components of the display device in the front-to-back direction are easily absorbed by the display module. Consequently, the state in which the display module is supported by the first and second adhesive members is maintained more stably. Thus, the display device according to this embodiment is a display device with improved reliability.

[0011] A display device according to a second aspect of the present disclosure may be a display device according to the first aspect, further comprising a spacer disposed between the second adhesive member and the housing, wherein the central portion is bonded to the spacer by the second adhesive member, and the spacer is fixed to the housing by a fixing member that is detachable from the housing.

[0012] According to the display device of the second embodiment described above, the central part of the back of the display module is bonded to a spacer by a second adhesive member, and the spacer is fixed to the housing by a fixing member that is detachable from the housing. In other words, the spacer bonded to the display module can be removed from the housing without damaging the spacer or the housing. Furthermore, since the peripheral part of the back of the display module and the housing can be connected using a first adhesive member which is relatively narrow, the peripheral part of the back of the display module can be peeled off the housing. This makes it easy to remove the display module from the housing. As a result, for example, the display module and housing can be reused and repaired.

[0013] The display device according to the third aspect of the present disclosure is the display device according to the first aspect or the second aspect, in the front-rear direction, the peripheral portion is located in front of the central portion, and the housing has a housing main body portion connected to the central portion via the second adhesive member, and a side wall portion protruding forward from the housing main body portion. The first adhesive member may connect the peripheral portion and the housing by adhering the peripheral portion and the adhesive surface facing forward of the side wall portion.

[0014] According to the display device according to the third aspect, the display module has a step structure in which the peripheral portion is located in front of the central portion in the front-rear direction. Further, the housing has a side wall portion protruding forward from the peripheral portion of the housing main body portion so as to correspond to this step structure. Therefore, for example, even when an adhesive member having the same thickness is employed as the first adhesive member and the second adhesive member, each of the first adhesive member and the second adhesive member can appropriately connect the display module and the housing.

[0015] The display device according to the fourth aspect of the present disclosure is the display device according to any one of the first to third aspects. When the thickness of the display module is T (unit: mm), the Young's modulus of the display module is E (unit: GPa), and the minimum distance between the first adhesive member and the second adhesive member when viewed from the front-rear direction is Lmin (unit: mm), Lmin = E × T 2 may satisfy.

[0016] In the display device according to the fourth aspect, the minimum distance Lmin (mm) between the second adhesive member and the first adhesive member is appropriately determined according to the thickness (front-rear width) of the display module and the hardness (or softness) of the display module. In other words, even when the design of the display module is changed in terms of thickness and / or hardness, by determining the minimum distance Lmin to a value that satisfies the above conditions, the display module and the housing are appropriately connected by each of the first adhesive member and the second adhesive member.

[0017] The display device according to the fifth aspect of the present disclosure is the display device according to any one of the first to fourth aspects, wherein the peripheral portion includes a first peripheral portion extending horizontally along the upper side of the rectangular back surface, and a second peripheral portion extending vertically along the right or left side of the back surface. The first adhesive member includes a first member and a second member that are adjacent to each other in the direction in which the peripheral portion extends and are separate from each other. The first member adheres the upper end portion of the second peripheral portion, the first peripheral portion, and the housing, and the second member adheres at least a part of the second peripheral portion below the upper end portion and the housing.

[0018] According to the display device according to the fifth aspect, the connection portion between the first peripheral portion and the second peripheral portion at the peripheral portion of the back surface of the display module, that is, the upper corner portion of the peripheral portion, is continuously adhered to the housing by the first member included in the first adhesive member. Therefore, the occurrence of problems (for example, intrusion of foreign matters such as liquid) that are likely to occur when there is a boundary between the first member and the second member at the upper end portion of the display module is suppressed.

[0019] Further advantages and effects in one aspect of the present disclosure will be clarified from the specification and the drawings. Such advantages and / or effects are provided by some embodiments and the configurations described in the specification and the drawings, but not all configurations are necessarily required.

[0020] Hereinafter, embodiments will be specifically described with reference to the drawings. The embodiments described below are all illustrative of comprehensive or specific examples. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components, steps, order of steps, etc. shown in the following embodiments are examples and are not intended to limit the present invention. Among the components in the following embodiments, the components not described in the independent claims indicating the most general concept are described as optional components. Each figure is a schematic diagram and is not necessarily drawn precisely. In each figure, the same reference numerals are assigned to the same components.

[0021] In the following explanation, the X-axis positive direction refers to the direction of the X-axis arrow, and the X-axis negative direction refers to the opposite direction. When simply referring to the X-axis direction, it refers to either the X-axis positive direction or the X-axis negative direction, or either direction. The same applies to the Y-axis and Z-axis directions. Expressions indicating relative directions or orientations, such as parallel and orthogonal, include cases where they are not strictly those directions or orientations. Two directions being parallel means not only that the two directions are perfectly parallel, but also that they are substantially parallel, i.e., that they may have a difference of a few percent.

[0022] (Embodiment) [1. Example of display device 100 arrangement] Figure 1 shows an example of the arrangement of multiple display devices 100 according to an embodiment. In this embodiment, the display device 100 is attached to each of the multiple seats 2 located in the cabin of the aircraft 1. That is, the display device 100 is attached to the back of the seat 2. The display device 100 attached to the seat 2 is directed toward the rear seat, which is another seat 2 immediately behind that seat 2, so that it can be seen by the passenger sitting in the rear seat. Such a display device 100 is used by the passenger in the rear seat. The display device 100 may be removable from and reattached to the seat 2 by the passenger. For example, a passenger sitting in a seat 2 may remove the display device 100 located in front of them and operate it from their seat.

[0023] [2. Overview of the Display Device 100 Configuration] Figure 2 is a perspective view showing the external appearance of the display device 100 according to the embodiment. Figure 3 is an exploded perspective view of the display device 100 according to the embodiment. In this embodiment, as shown in Figures 2 and 3, the direction in which the display device 100 displays an image is described as the negative Y-axis direction, the left-right direction as the X-axis direction, and the up-down direction as the Z-axis direction. In other words, below, for example, "front" means the negative Y-axis direction, and "rear" means the positive Y-axis direction. In this embodiment, "right" and "left" mean "right" and "left" when the display device 100 is viewed from the front. In other words, below, for example, "to the right" means the positive X-axis direction, and "to the left" means the negative X-axis direction.

[0024] There are no particular limitations on the orientation of the display device 100 during use, and the display device 100 may be installed in a predetermined location so as to display an image downwards, diagonally downwards, upwards, or diagonally upwards.

[0025] As shown in Figures 2 and 3, the display device 100 according to this embodiment comprises a display module 101, a housing 150, a first adhesive member 210, and a second adhesive member 250. The display module 101 includes a display panel 120 that displays an image on its front surface. More specifically, the display module 101 according to this embodiment further includes a light-transmitting touch panel 110 positioned in front of the display panel 120. The touch panel 110 has a first front surface 114 facing forward and a first back surface 115 facing backward. The display panel 120 has a second front surface 124 facing forward and a second back surface 125 facing backward.

[0026] The touch panel 110 comprises a front panel forming a first front surface 114 and a sensor panel that detects human finger contact using a predetermined method such as a capacitive method. The front panel and the sensor panel have a predetermined light transmittance. As a result, a person positioned in front of the display device 100 can view the image displayed on the display panel 120, which is positioned opposite the first back surface 115 of the touch panel 110, through the touch panel 110. In this embodiment, the front panel is a plate-shaped member formed of a transparent resin such as acrylic resin. The sensor panel is a member on which a plurality of electrodes for detecting the touched position are arranged, for example, on a substrate made of resin.

[0027] The detection result from the touch panel 110 is sent via wires (not shown) to a control circuit (not shown) that controls the image display on the display panel 120. The control circuit can control the display of the image on the display panel 120 according to the detection result.

[0028] In this embodiment, the display module 101 includes, for example, an organic EL display panel as the display panel 120. In this embodiment, the second front surface 124 of the display panel 120 is bonded to the first back surface 115 of the touch panel 110 by an adhesive member 140. The adhesive member 140 is, for example, a transparent adhesive called OCR (Optical Clear Resin).

[0029] The housing 150 is a component that holds the display module 101 and is made of a metal such as aluminum or an aluminum alloy. The housing 150 comprises a housing body portion 153 facing the second rear surface 125 of the display panel 120 and a side wall portion 151 projecting forward from the periphery of the housing body portion 153. In this embodiment, the housing body portion 153 of the housing 150 is configured to connect to, for example, the seat 2 of the aircraft 1 (see Figure 1), or to a fixing member interposed between the seat 2 and the housing 150 (e.g., bolt holes). As a result, the display device 100 is attached to the seat 2 directly or via the fixing member. The material of the housing 150 is not limited to metal; for example, the housing 150 may be manufactured by resin molding.

[0030] In the display device 100 configured in this way, the display module 101 is attached to the housing 150 using a first adhesive member 210 and a second adhesive member 250, which are spaced apart from each other when viewed from the front and rear directions. The first adhesive member 210 and the second adhesive member 250 are, for example, double-sided adhesive sheets (also called "double-sided tape") which have adhesive layers on both sides of a sheet-like base material. The attachment structure of the display module 101 to the housing 150 in the display device 100 will be further described below with reference to Figures 4 to 6.

[0031] [3. Regarding the mounting structure of the display module 101 to the housing 150] Figure 4 is a cross-sectional view showing the mounting structure of the display module 101 to the housing 150 according to the embodiment. In Figure 4, a part of the cross-section of the display device 100, specifically a part of the cross-section parallel to the YZ plane passing through line IV-IV in Figure 2, is schematically shown. In Figure 4, for the sake of simplicity, the touch panel 110 is shown as a single structure comprising the front panel and the sensor panel. Figure 5A is a rear view (viewed from the positive Y-axis direction) showing the configuration of the back surface 105 of the display module 101 according to the embodiment. Figure 5B is a front view (viewed from the negative Y-axis direction) showing an example of the layout of the first adhesive member 210 and the second adhesive member 250 according to the embodiment. In Figure 5B, the outline of the touch panel 110 is represented by a dashed rectangle, and the outline of the display panel 120 is represented by a dotted rectangle. In Figures 5A and 5B, the center line C in the left-right direction of the display module 101 is represented by a dotted line extending in the Z-axis direction. Figure 6 is an exploded perspective view showing an enlarged portion of the first adhesive member 210 according to the embodiment.

[0032] As shown in Figure 4, in this embodiment, the display panel 120, which is an organic EL display panel, comprises a glass substrate 121 and an organic EL element 126. More specifically, the display panel 120 comprises a pair of glass substrates 121 facing each other in the front-to-back direction, and an organic EL element 126 disposed between the pair of glass substrates 121. When distinguishing between the pair of glass substrates 121, the front glass substrate 121 is referred to as glass substrate 121a, and the rear glass substrate 121b. Glass substrate 121a is, for example, a CF substrate, which is a glass substrate on which a color filter is formed. The second front surface 124 of the display panel 120 is formed by the front surface (the surface in the negative Y-axis direction) of glass substrate 121a. Glass substrate 121b is, for example, a TFT substrate, which is a glass substrate on which various elements such as gate electrodes are laminated. The second back surface 125 of the display panel 120 is formed by the back surface (the surface in the positive Y-axis direction) of glass substrate 121b. The organic EL element 126 is a light-emitting section comprising an anode which is a lower electrode, an EL layer which is a light-emitting layer made of an organic material, and a cathode which is a transparent upper electrode.

[0033] A touch panel 110 is positioned on the second front surface 124 of the display panel 120 having the above configuration, via an adhesive member 140, such as an OCR. The back surface 105 of the display module 101 configured in this way consists of a peripheral portion 106 including the edge of the display module 101, and a central portion 108 which is the area inside the peripheral portion 106, as shown in Figure 5A. Specifically, as shown in Figures 4 to 6, when the display module 101 is viewed from the front or back, the size of the touch panel 110 is larger than that of the display panel 120. In other words, when viewed from the rear (positive Y-axis direction), the outer edge of the touch panel 110 extends beyond the display panel 120. In this embodiment, the area outside the display panel 120 and inside the touch panel 110 when the display module 101 is viewed from the rear is referred to as the peripheral edge 106 of the back surface 105 of the display module 101 (hereinafter also simply referred to as "peripheral edge 106" or "peripheral edge 106 of the display module 101"). In other words, the portion of the first back surface 115 of the touch panel 110 that is outside the display panel 120 is treated as the peripheral edge 106 of the back surface 105 of the display module 101. The width of the peripheral edge 106 in the direction perpendicular to the front-to-back direction and the direction in which the peripheral edge 106 extends (length in the Z-axis direction in Figure 4) is, for example, 0.5 mm or more and 5 mm or less.

[0034] Furthermore, the area where the touch panel 110 is located when the display module 101 is viewed from the rear is referred to as the central part 108 of the back surface 105 of the display module 101 (hereinafter also simply referred to as "central part 108" or "central part 108 of the display module 101"). In other words, the entire area of ​​the second back surface 125 of the display panel 120 is treated as the central part 108 of the back surface 105 of the display module 101.

[0035] Furthermore, if the display module 101 does not have a touch panel 110, the entire area of ​​the second back surface 125 of the display panel 120 is treated as the "back surface 105 of the display module 101," and the peripheral portion including the edge of the second back surface 125 is treated as the "peripheral portion 106 of the display module 101." In other words, the second back surface 125, which is the back surface 105 of the display module 101, is divided into the peripheral portion 106 and the central portion 108 inside the peripheral portion 106.

[0036] Thus, for the display module 101 having a back surface 105 divided into two regions (peripheral portion 106 and central portion 108), the first adhesive member 210 and the second adhesive member 250 are arranged in different regions. Specifically, the first adhesive member 210 connects the peripheral portion 106 of the display module 101 to the housing 150. The second adhesive member 250 connects the central portion 108 of the display module 101 to the housing 150.

[0037] More specifically, as shown in Figure 4, the first adhesive member 210 directly connects the peripheral edge 106 of the display module 101 and the housing 150. In other words, the first adhesive member 210 connects the peripheral edge 106 of the display module 101 and the housing 150 by adhering to both the peripheral edge 106 of the display module 101 and the housing 150. In this embodiment, the first adhesive member 210 is arranged in a rectangular ring shape along the peripheral edge 106 of the display module 101. That is, the first adhesive member 210 is positioned to fill the gap between the peripheral edge 106 of the display module 101 and the housing 150. The flexibility of the first adhesive member 210 is achieved through the inter-member properties of double-sided tape, etc. Therefore, compared to the case where the peripheral edge 106 of the display module 101 and the housing 150 are connected via a highly rigid member such as a bracket or frame, the gap between the peripheral edge 106 and the housing 150 is more easily filled. This contributes to improving the reliability of the display device 100.

[0038] As shown in Figures 5A and 5B, the peripheral portion 106 of the display module 101 includes a first peripheral portion 106a extending left and right along the upper edge of the rectangular back surface 105, and a second peripheral portion 106b extending up and down along the right or left edge of the back surface 105. In this embodiment, the peripheral portion 106 includes a pair of left and right second peripheral portions 106b. That is, the peripheral portion 106 includes a second peripheral portion 106b extending along the left edge (edge ​​in the negative X-axis direction) of the back surface 105, and a second peripheral portion 106b extending along the right edge (edge ​​in the positive X-axis direction) of the back surface 105. The peripheral portion 106 further includes a third peripheral portion 106c extending left and right along the lower edge of the rectangular back surface 105. In other words, in this embodiment, the rectangular annular peripheral portion 106 is composed of a first peripheral portion 106a, a pair of second peripheral portions 106b, and a third peripheral portion 106c.

[0039] With respect to the peripheral portion 106 configured as described above, the first adhesive member 210 includes a first member 211 and a second member 220 that are adjacent to each other in the direction in which the peripheral portion 106 extends and are separate from each other. As shown in Figures 5B and 6, the first member 211 adheres the upper end of the second peripheral portion 106b and the first peripheral portion 106a to the housing 150. In other words, the first member 211 has an L-shaped portion that includes a portion extending in the left-right direction (X-axis direction) along the first peripheral portion 106a and a portion extending in the up-down direction (Z-axis direction) along the second peripheral portion 106b. The second member 220 adheres at least a portion of the second peripheral portion 106b below the upper end to the housing 150.

[0040] More specifically, the first adhesive member 210 includes a pair of upper and lower first members 211 and a pair of left and right second members 220. The lower first member 211 has an L-shaped portion that includes a portion extending in the left-right direction (X-axis direction) along the third peripheral edge 106c and a portion extending in the up-down direction (Z-axis direction) along the second peripheral edge 106b. In this embodiment, the pair of upper and lower first members 211 are a common member (part). For example, the lower first member 211 can be obtained by preparing the same member (part) as the upper first member 211 and rotating it 180° around the X-axis or Z-axis. The pair of left and right second members 220 are arranged between the pair of upper and lower first members 211 configured in this way. Specifically, as shown in Figure 5B, the second members 220 are arranged between the left ends (ends in the negative X-axis direction) of the pair of upper and lower first members 211, and between the right ends (ends in the positive X-axis direction) of the pair of upper and lower first members 211. This results in the formation of a rectangular annular first adhesive member 210 along the rectangular annular peripheral edge 106.

[0041] A gap S is provided between the first member 211 and the second member 220 in the first adhesive member 210 that extends along the peripheral edge 106. Specifically, when the first member 211 and the second member 220, which are double-sided tapes, are attached to the peripheral edge 106 of the display module 101, if the ends of the first member 211 and the ends of the second member 220 overlap in the front-to-back direction, a gap (a path from the outside to the inside of the display device 100) is easily formed between the peripheral edge 106 and the housing 150 at this overlapping portion. Therefore, if the screen size of the display panel 120 is, for example, 19 inches or larger, the sizes of the first member 211 and the second member 220 are determined in the design so that a gap S of about 2 mm is formed between the first member 211 and the second member 220. This prevents one end of the first member 211 and the second member 220 from overlapping (overlapping in the front-to-back direction) with the other end when the first member 211 and the second member 220 are attached to the peripheral edge 106.

[0042] If a gap S exists at the upper end of the display module 101, and a liquid such as a beverage provided to passengers on the aircraft 1 adheres to the display device 100 from above, the liquid can easily penetrate into the interior of the display device 100 through the gap S. In this regard, in the display device 100 according to this embodiment, as shown in Figures 5B and 6, the gap S between the first member 211 and the second member 220 is located at the left-right end of the display module 101. This prevents, for example, liquid from penetrating into the interior of the display device 100 through the gap S.

[0043] It is not essential that a gap S be provided between the first member 211 and the second member 220. For example, the first adhesive member 210 may be a rectangular annular adhesive member comprising an upper and lower pair of first members 211 and a left and right pair of second members 220 as a single unit. However, in this case, since the first adhesive member 210 is manufactured by cutting out a rectangular section from the center of a single rectangular base material (e.g., double-sided tape), a large area of ​​the central part of the base material becomes waste material. This increases the production cost of the first adhesive member 220. This problem becomes more pronounced as the screen size of the display panel 120 increases. In this regard, the first adhesive member 210 according to this embodiment is composed of multiple elongated members (a pair of first members 211 and a pair of second members 220). Therefore, these multiple members can be efficiently cut from a single base material. This suppresses the increase in the production cost of the first adhesive member 210.

[0044] As shown in Figures 3 and 4, the second adhesive member 250 connects the central part 108 of the display module 101 and the housing 150 via the spacer 300. In other words, the second adhesive member 250 is bonded to the central part 108 of the display module 101 and also to the spacer 300.

[0045] The spacer 300, attached to the central part 108 of the display module 101 by the second adhesive member 250, is fixed to the housing 150 by a fixing member 400 that is detachable from the housing 150. In this embodiment, a screw is used as the fixing member 400. The fixing member 400 has a screw shaft portion 410 with screw threads formed on its outer circumference. The screw shaft portion 410 of the fixing member 400 passes through a through hole 154 provided in the housing body portion 153 of the housing 150 and is screwed into a screw hole 310 provided in the spacer 300. The housing body portion 153 has a spacer restricting portion 159 (see Figures 3 and 4) that contacts the spacer 300 and restricts the movement of the spacer 300 to the rear (negative Y-axis direction). This determines the front-to-back position (Y-axis direction) of the spacer 300 fixed by the fixing member 400.

[0046] In this embodiment, the spacer 300 comprises a flat spacer body 301 and a metal nut 305. The nut 305 is integrally provided with the spacer body 301, for example, by insert molding. In other words, the screw hole 310 of the spacer 300 is provided in the nut 305. The surface of the spacer 300 facing the display module 101 (the surface in the negative Y-axis direction) is formed to be substantially flat, and the second adhesive member 250 is bonded to almost the entire surface. It is not essential that the spacer 300 includes a nut 305. The spacer body 301 may have a screw hole that engages with the screw shaft portion 410, and the screw groove is formed on the inner circumferential surface of the screw hole.

[0047] In this embodiment, as shown in Figure 3, the spacer 300 is fixed to the housing 150 by six fixing members 400. The number of fixing members 400 used to fix the spacer 300 can be one or more. However, from the viewpoint of stably supporting the flat spacer 300, it is preferable that the number of fixing members 400 be two or more.

[0048] As shown in Figures 3 and 5B, in this embodiment, two sets of second adhesive members 250 and spacers 300 are placed between the display module 101 and the housing 150. The two second adhesive members 250 are positioned on either side of the center line C in the left-right direction of the display module 101, and spaced apart in the left-right direction. A spacer 300 is bonded to each of the two second adhesive members 250, and the two spacers 300 are fixed to the housing 150 by a plurality of fixing members 400 as described above. As a result, the display module 101 is supported by the housing 150 in a balanced manner. The number of sets of second adhesive members 250 and spacers 300 is not limited to two, but may be one or three or more.

[0049] In this embodiment, the positions of the first adhesive member 210 and the second adhesive member 250 in the front-to-back direction (Y-axis direction) are different from each other. Specifically, as shown in Figure 4, in the front-to-back direction (Y-axis direction), the peripheral edge 106 of the display module 101 is located in front of the central part 108 of the display module 101 (in the negative Y-axis direction). Therefore, in the front-to-back direction, the first adhesive member 210 is located in front of the second adhesive member 250. The housing 150 has a side wall portion 151 that protrudes forward from the housing body portion 153. Specifically, the side wall portion 151 protrudes forward from the outer edge of the housing body portion 153. The side wall portion 151 has an adhesive surface 151a facing forward. The first adhesive member 210 connects the peripheral edge 106 and the housing 150 by bonding the peripheral edge 106 and the adhesive surface 151a of the side wall portion 151. The spacer 300, which is bonded to the central portion 108 by the second adhesive member 250, is fixed to the housing body portion 153 by the fixing member 400. In this embodiment, the side wall portion 151 has a protective wall portion 151b on the outside of the adhesive surface 151a, as shown in Figures 4 and 6. The protective wall portion 151b is positioned to surround the peripheral edge portion 106 of the display module 101 when the display device 100 is viewed from the front. As a result, the edge of the peripheral edge portion 106 is protected by the protective wall portion 151b.

[0050] In this embodiment, the first adhesive member 210 and the second adhesive member 250 are spaced apart when viewed from the front-to-back direction (Y-axis direction). Now, let's consider a case where the first adhesive member 210 and the second adhesive member 250 are placed consecutively or in close proximity when viewed from the front-to-back direction. In this case, it becomes difficult for at least one of the first adhesive member 210 and the second adhesive member 250 to maintain a good adhesive state due to dimensional tolerances for the thickness of the first adhesive member 210 and the second adhesive member 250, and / or dimensional tolerances in the front-to-back direction of the housing 150. Furthermore, dimensional tolerances in the front-to-back direction of the display module 101 and the spacer 300 can also adversely affect the adhesive state of at least one of the first adhesive member 210 and the second adhesive member 250. For example, the OCR adhesive member 140, which is placed between the touch panel 110 and the display panel 120 in the display module 101, is a liquid at the time of application to either the touch panel 110 or the display panel 120. Therefore, variations (solid-state differences) are likely to occur in the width (thickness) of the display module 101 in the front-to-back direction after the liquid has solidified.

[0051] For example, when the display device 100 is assembled, consider a case where the front surface (the surface in the negative Y-axis direction) of the second adhesive member 250 is located further forward than the design position due to dimensional tolerances of the second adhesive member 250, etc. In other words, consider a case where the distance (actual distance) between the front surface of the first adhesive member 210 and the front surface of the second adhesive member 250 in the front-to-back direction is smaller than the design distance (design distance). In this case, if the first adhesive member 210 and the second adhesive member 250 are close together, the central part 108 of the display module 101 is pushed forward, applying a relatively large forward force to the peripheral part 106. As a result, the first adhesive member 210 becomes prone to peeling off from the adhesive surface 151a of the housing 150 (see Figure 4) or the peripheral part 106 of the display module 101.

[0052] One possible solution to the above problem is to increase the distance between the first adhesive member 210 and the second adhesive member 250 when viewed from the front-to-back direction. In this case, even if the actual distance is smaller than the design distance, the display module 101 will flex, making it easier to absorb the difference between the actual distance and the design distance. As a result, it is thought that the problem of the first adhesive member 210 peeling off will be less likely to occur. However, increasing the distance between the first adhesive member 210 and the second adhesive member 250 when viewed from the front-to-back direction will lead to a reduction in the size of the second adhesive member 250 (area when viewed from the front-to-back direction), for example. This will be a factor in reducing the connection strength between the display module 101 and the housing 150.

[0053] As a result of diligent study of the above problem, the inventors of this application have found conditions under which the connection strength between the display module 101 and the housing 150 can be ensured while maintaining a good bonding state between the first adhesive member 210 and the second adhesive member 250.

[0054] Specifically, the minimum distance between the first adhesive member 210 and the second adhesive member 250 was measured when the thickness of the display module 101 and the Young's modulus of the display module 101 were changed, and this minimum distance was measured so that no problems occurred in the bonding state of the first adhesive member 210 and the second adhesive member 250. The measurement results are shown in Table 1 below. In Table 1 below, the value in each field of the top row indicates the thickness T (unit: mm) of the display module 101, and the value in each field of the leftmost column indicates the Young's modulus E (unit: Gpa) of the display module 101. Specifically, the thickness T and Young's modulus E of the display module 101 are the thickness and Young's modulus of the portion of the display module 101 where the touch panel 110 and the display panel 120 overlap. In Table 1 below, the value in the field where the row and column intersect indicates the minimum distance Lmin (unit: mm) between the first adhesive member 210 and the second adhesive member 250 when viewed from the front-to-back direction.

[0055] [Table 1]

[0056] As shown in Table 1 above, the display module 101 used by the display device 100 is, for example, a display module having a Young's modulus E of 1 Gpa or more and 20 Gpa or less, and a thickness T of 1 mm or more and 5 mm or less.

[0057] For example, if the thickness T (unit: mm) of the display module 101 is "3" and the Young's modulus E (unit: Gpa) of the display module 101 is "5", then the minimum distance Lmin (unit: mm) at which no problems occur in the bonding state of the first adhesive member 210 and the second adhesive member 250 is "45". Based on these measurement results, simply put, the harder the display module 101 (the larger the Young's modulus E) and the larger the thickness T of the display module 101, the larger the minimum distance Lmin between the first adhesive member 210 and the second adhesive member 250 when viewed from the front-to-back direction needs to be. More specifically, based on these measurement results, the inventors of the present invention have concluded that the connection strength between the display module 101 and the housing 150 can be ensured, and no problems occur in the bonding state of the first adhesive member 210 and the second adhesive member 250, if the thickness T of the display module 101, the Young's modulus E of the display module 101, and the minimum distance Lmin satisfy the following equation 1.

[0058] Lmin = E × T 2 (Formula 1)

[0059] In this embodiment, when the distance between the first adhesive member 210 and the second adhesive member 250 as viewed from the front-rear direction is L, the distance L between the first adhesive member 210 and the second adhesive member 250 in the vertical direction (Z-axis direction) is the minimum (i.e., minimum distance Lmin). Therefore, the value of Lmin obtained from the above equation 1 is adopted as the distance L between the first adhesive member 210 and the second adhesive member 250 in the vertical direction. In other words, the distance L (unit: mm) between the first adhesive member 210 and the second adhesive member 250 as viewed from the front-rear direction is E × T at any position. 2(That is, it is greater than or equal to the product of the value of Young's modulus E (unit: Gpa) and the square of the thickness T (unit: mm) of the display module 101. Equation 1 above may also be applied when the Young's modulus E of the display module 101 is less than 1 Gpa or greater than 20 Gpa. Equation 1 above may also be applied when the thickness T of the display module 101 is less than 1 mm or greater than 5 mm.

[0060] The technical features of the display device 100 according to this embodiment, configured as described above, can be explained as follows, for example.

[0061] The display device 100 according to this embodiment is a display device used in an aircraft 1. The display device 100 comprises a display module 101 having a display panel 120 for displaying an image on its front surface, a housing 150 facing the back surface 105 of the display module 101 and supporting the display module 101, a first adhesive member 210, and a second adhesive member 250. The first adhesive member 210 connects the peripheral edge 106 of the back surface 105 to the housing 150. The second adhesive member 250 connects the central portion 108, which is the area inside the peripheral edge 106 of the back surface 105, to the housing 150. When viewed from the front or rear direction, the first adhesive member 210 and the second adhesive member 250 are spaced apart around the entire circumference of the second adhesive member 250.

[0062] As described above, in the display device 100 according to this embodiment, the peripheral edge 106 of the back surface 105 of the display module 101 and the housing 150 are connected by the first adhesive member 210. This prevents foreign matter such as dust or liquid from entering the inside of the display module 101 from the peripheral edge 106. In addition, the central part 108 of the back surface 105 of the display module 101 and the housing 150 are connected by the second adhesive member 250, thereby ensuring the connection strength between the display module 101 and the housing 150. Furthermore, the first adhesive member 210 and the second adhesive member 250 are spaced apart around the entire circumference of the second adhesive member 250. As a result, dimensional tolerances of the components of the display device 100 (first adhesive member 210, second adhesive member 250, and housing 150, etc.) in the front-to-back direction are easily absorbed by the display module 101. Consequently, the state in which the display module 101 is supported by the first adhesive member 210 and the second adhesive member 250 is maintained more stably. As a result, for example, the resistance of the display device 100 to vibration and / or shock is improved. Thus, the display device 100 according to this embodiment is a display device 100 with improved reliability.

[0063] The display device 100 according to this embodiment further includes a spacer 300 positioned between the second adhesive member 250 and the housing 150 (see Figures 3 and 4). The central portion 108 is bonded to the spacer 300 by the second adhesive member 250. The spacer 300 is fixed to the housing 150 by a fixing member 400 that is detachable from the housing 150.

[0064] As described above, in this embodiment, the central portion 108 of the back surface 105 of the display module 101 is bonded to the spacer 300 by a second adhesive member 250, and the spacer 300 is fixed to the housing 150 by a fixing member 400 that is detachable from the housing 150. In other words, the spacer 300 bonded to the display module 101 can be removed from the housing 150 without damaging the spacer 300 or the housing 150. Furthermore, since the peripheral portion 106 of the back surface 105 of the display module 101 and the housing 150 can be connected using a relatively narrow first adhesive member 210, the peripheral portion 106 of the back surface 105 of the display module 101 can be peeled off from the housing 150. This makes it easy to remove the display module 101 from the housing 150. As a result, for example, the display module 101 and the housing 150 can be reused and repaired.

[0065] In the display device 100 according to this embodiment, the peripheral portion 106 is located in front of the central portion 108 in the front-to-back direction. The housing 150 has a housing body portion 153 connected to the central portion 108 via a second adhesive member 250, and a side wall portion 151 that protrudes forward from the housing body portion 153. The first adhesive member 210 connects the peripheral portion 106 and the housing 150 by bonding the peripheral portion 106 and the adhesive surface 151a of the side wall portion 151 that faces forward.

[0066] Thus, in this embodiment, the display module 101 has a stepped structure in which the peripheral portion 106 is located in front of the central portion 108 in the front-to-back direction. Furthermore, the housing 150 has a side wall portion 151 that protrudes forward from the peripheral portion 106 of the housing body portion 153 to correspond to this stepped structure. Therefore, even if adhesive members (such as double-sided tape) of the same thickness are used as the first adhesive member 210 and the second adhesive member 250, each of the first adhesive member 210 and the second adhesive member 250 can appropriately connect the display module 101 and the housing 150.

[0067] In the display device 100 according to this embodiment, if the thickness of the display module 101 is T (unit: mm), the Young's modulus of the display module 101 is E (unit: Gpa), and the minimum distance between the first adhesive member 210 and the second adhesive member 250 when viewed from the front-to-back direction is Lmin (unit: mm), then Lmin = E × T 2 It satisfies the condition.

[0068] Thus, in this embodiment, the minimum distance Lmin (mm) between the second adhesive member 250 and the first adhesive member 210 is appropriately determined according to the thickness (width in the front-to-back direction) of the display module 101 and the hardness (or softness) of the display module 101. In other words, even if the thickness and / or hardness of the display module 101 is redesigned, by determining the minimum distance Lmin to a value that satisfies the above conditions, the display module 101 and the housing 150 are appropriately connected by the first adhesive member 210 and the second adhesive member 250, respectively.

[0069] In the display device 100 according to this embodiment, as shown in Figures 5A and 5B, the peripheral edge 106 includes a first peripheral edge 106a extending left and right along the upper edge of the rectangular back surface 105, and a second peripheral edge 106b extending up and down along the right or left edge of the back surface 105. The first adhesive member 210 includes a first member 211 and a second member 220. The first member 211 and the second member 220 are adjacent in the direction in which the peripheral edge 106 extends, and are separate from each other. The first member 211 adheres the upper end of the second peripheral edge 106b and the first peripheral edge 106a to the housing 150. The second member 220 adheres at least a portion of the second peripheral edge 106b below the upper end to the housing 150.

[0070] With this configuration, the connection portion between the first peripheral portion 106a and the second peripheral portion 106b of the peripheral portion 106 of the display module 101, that is, the upper corner portion of the peripheral portion 106, is continuously bonded to the housing 150 by the first member 211 included in the first adhesive member 210 (see Figures 5A and 6). Therefore, the occurrence of problems (for example, intrusion of foreign matter such as liquid) that tend to occur when a boundary (gap S in this embodiment) exists between the first member 211 and the second member 220 at the upper end of the display module 101 is suppressed.

[0071] The display device 100 according to this embodiment has been described above, but the configuration of the display device 100 is not limited to the configuration described in the above embodiment. Therefore, a modified example of the configuration of the display device 100 will be described, focusing on the differences from the above embodiment.

[0072] [4. Variant] Figure 7 is an exploded perspective view of a modified display device 100a according to the embodiment. In Figure 7, the fixing member 400 (see Figure 4) is not shown. Figure 8 is a cross-sectional view showing the mounting structure of the display module 101 to the housing 150 according to the modified embodiment. The position of the cross section in Figure 7 corresponds to the position of the cross section in Figure 4.

[0073] As shown in Figures 7 and 8, the display device 100a according to this modified example includes a metal plate 600 in addition to the components of the display device 100 according to the embodiment. The metal plate 600 is a component that is thermally connected to the display module 101. More specifically, the metal plate 600 according to this modified example has openings 610 at positions corresponding to the second adhesive member 250 and the spacer 300. Therefore, the metal plate 600 can be brought close to the display module 101 without interfering with the second adhesive member 250 and the spacer 300 in the front-to-back direction. This allows for efficient thermal connection between the display module 101 and the metal plate 600. The material used for the metal plate 600 is iron, aluminum, or an aluminum alloy. The thickness of the metal plate 600 is, for example, about 0.5 mm to 2 mm.

[0074] More specifically, in the modified display device 100a, an insulating sheet 700 is placed on the back of the metal plate 600. The insulating sheet 700 has openings 710 at positions corresponding to the second adhesive member 250 and the spacer 300. This electrically insulates the metal plate 600 from the cables and housing 150 located on the back side of the metal plate 600. Normally, as shown in Figure 8, for example, the metal plate 600 and the housing 150 are kept in a state where they do not come into contact. However, due to vibration or shock of the aircraft body, or when a passenger pushes the display module 101, the metal plate 600 and the housing 150 may come into close proximity. Therefore, placing the insulating sheet 700 between the metal plate 600 and the housing 150 is effective in suppressing malfunctions caused by electrical contact between the metal plate 600 and the housing 150.

[0075] Furthermore, in the front-to-back direction, the insulating sheet 700 and the metal plate 600 do not overlap the second adhesive member 250 and the spacer 300. Therefore, the increase in the thickness (width in the front-to-back direction) of the display device 100a due to the inclusion of the insulating sheet 700 and the metal plate 600 is suppressed. The display device 100a may include the insulating sheet 700 even if it does not include the metal plate 600. This allows for electrical isolation between the back surface 105 of the display module 101 and the cables and housing 150 etc. located behind the back surface 105.

[0076] The metal plate 600, being thermally connected to the display module 101, can function as a heat sink for the display module 101 when the display device 100a is in use. This suppresses deterioration of the display panel 120 due to heat. The metal plate 600 may also function as a reinforcing member to improve the mechanical strength of the display device 100a.

[0077] As shown in Figure 1, the display device 100a is attached, for example, to a seat 2 of an aircraft 1. In other words, the display module 101 of the display device 100a is treated as one of the components of the aircraft 1. Therefore, the amount of heat generated when the display module 101 burns due to some external factor (the average amount of heat generated over a predetermined period, or / or the maximum amount of heat generated over a predetermined period from the start of combustion) must be less than or equal to a value specified in a predetermined standard. In this regard, since the display module 101 is a structure in which the touch panel 110 and the display panel 120 are integrated via an adhesive member 140, the amount of heat generated during combustion may be relatively high. In this case, a metal plate 600 arranged along the display module 101 may function as a member that suppresses the amount of heat generated during combustion. In this modified example, the metal plate 600 is arranged to cover the area on the back surface 105 of the display module 101, excluding the area where the second adhesive member 250 and the spacer 300 are located. This allows for blocking or suppressing the air supply from the back surface 105 of the display module 101. As a result, combustion of the display module 101 is suppressed, thereby reducing the amount of heat generated during combustion. In addition, the metal plate 600 has the function of absorbing heat from the display module 101. This also contributes to suppressing the amount of heat generated during combustion of the display module 101.

[0078] When the amount of heat generated during combustion of the display module 101 is less than or equal to a value specified in a predetermined standard, the display device 100a does not need to be equipped with a metal plate 600. Not being equipped with a metal plate 600 in the display device 100 is advantageous, for example, from the viewpoint of reducing the weight of the display device 100.

[0079] (Other embodiments) The display device relating to this disclosure has been described above based on the embodiments and their modifications; however, this disclosure is not limited to the embodiments and modifications described above.

[0080] The display panel 120 of the display module 101 may be a different type of display panel than the organic EL display panel. For example, a liquid crystal display panel may be used as the display panel 120.

[0081] The first adhesive member 210 does not necessarily have to be composed of a first member 211 and a second member 220 that are separate from each other. The first adhesive member 210 may be, for example, a series of rectangular annular members along the peripheral edge 106 as described above. In this embodiment, the first adhesive member 210 is composed of four members (a pair of first members 211 and a pair of second members 220), but the first adhesive member 210 may be composed of five or more members. However, it is preferable that the gap S between two members arranged along the peripheral edge 106 is positioned along the second peripheral edge 106b that extends vertically, or along the first peripheral edge 106a that extends horizontally along the lower edge of the back surface 105.

[0082] The first adhesive member 210 does not need to be placed over the entire area of ​​the peripheral portion 106. For example, if a portion of the peripheral portion 106 of the display module 101 is connected to the side wall portion 151 of the housing 150 by another member, the first adhesive member 210 may be placed only in the area of ​​the peripheral portion 106 excluding that portion.

[0083] The second adhesive member 250 may connect the display module 101 and the housing 150 without using the spacer 300. For example, if there is a protrusion on the central part 108 of the back surface 105 of the display module 101 that protrudes toward the housing 150, the second adhesive member 250 may bond the protrusion to the housing 150. If the housing 150 is a flat plate-shaped member without side walls 151, the first adhesive member 210 may bond the peripheral part 106 of the display module 101 to the housing 150, and the second adhesive member 250 may bond the central part 108 of the display module 101 to the housing 150. In this way, the second adhesive member 250 may directly connect the central part 108 of the display module 101 to the housing 150.

[0084] It is not mandatory for the display module 101 to include a touch panel 110. The display module 101 only needs to have the ability to display an image. In other words, the display module 101 may include only the display panel 120 of the two display panels 120, including the touch panel 110. Instead of the touch panel 110, the display module 101 may include, for example, a translucent panel to protect the display panel 120, or an optical element to add some kind of optical effect to the image displayed by the display panel 120.

[0085] The size and shape of the display device 100 are not limited to those shown in Figures 1 and 2, for example. The display device 100 may be, for example, small enough to be held in one hand by a user. In this case, the display device 100 may incorporate a processor, memory, battery, etc., for performing various processes such as displaying images and communicating with other devices. In other words, the display device 100 may be implemented as a portable terminal.

[0086] Each of the various supplementary details concerning the display device 100 according to the above embodiment may be appropriately applied to modified versions of the embodiment. In addition, the present invention also includes forms obtained by applying various modifications to each embodiment and modified version that a person skilled in the art can conceive, as well as forms realized by arbitrarily combining the components and functions of each embodiment and modified version without departing from the spirit of the present invention. Furthermore, the present invention also includes any combination of two or more claims from the multiple claims described in the claims at the time of filing the present application, provided that they are not technically contradictory. [Industrial applicability]

[0087] The display device of this disclosure can be applied, for example, to a display device mounted on an aircraft. [Explanation of symbols]

[0088] 1 aircraft 2 sheets 100, 100a display device 101 Display Module 105 Back 106 Peripheral area 106a First peripheral edge 106b Second margin 106c Third peripheral edge 108 Central part 110 Touch Panel 114 First front 115 First back 120 Display Panel 121, 121a, 121b Glass substrate 124 Second front 125 Second back 126 Organic EL elements 140 Adhesive Members 150 cabinets 151 Side wall section 151a Adhesive surface 153 Main body of the enclosure 154 Through hole 159 Spacer regulation section 210 First adhesive member 211 First component 220 Second component 250 Second adhesive member 300 Spacer 301 Spacer body 305 Nut 310 screw holes 400 Fixing member 410 Screw shaft 600 metal plate 610, 710 opening 700 Insulating Sheets

Claims

1. A display device used in aircraft, A display module having a display panel on the front that displays an image, A housing facing the back of the display module and supporting the display module, A first adhesive member connects the peripheral edge of the rear surface to the housing, The system includes a second adhesive member that connects the central portion, which is the inner region of the peripheral edge on the back surface, to the housing, When viewed from the front and rear directions, the first adhesive member and the second adhesive member are spaced apart around the entire circumference of the second adhesive member. Display device.

2. Furthermore, a spacer is provided between the second adhesive member and the housing, The central portion is bonded to the spacer by the second adhesive member. The spacer is fixed to the housing by a fixing member that is detachable from the housing. The display device according to claim 1.

3. In the aforementioned front-to-back direction, the peripheral portion is located forward of the central portion. The housing has a housing body portion connected to the central portion via the second adhesive member, and a side wall portion that protrudes forward from the housing body portion. The first adhesive member connects the peripheral edge and the housing by bonding the peripheral edge and the forward-facing adhesive surface of the side wall. The display device according to claim 1 or 2.

4. Let T be the thickness of the display module (unit: mm). Let the Young's modulus of the aforementioned display module be E (unit: Gpa), When viewed from the front-to-back direction, if the minimum distance between the second adhesive member and the first adhesive member is Lmin (unit: mm), Lmin = E×T ２ Satisfying The display device according to claim 1 or 2.

5. The aforementioned peripheral portion includes a first peripheral portion extending left and right along the upper edge of the rectangular back surface, and a second peripheral portion extending up and down along the right or left edge of the back surface. The first adhesive member includes a first member and a second member that are adjacent to each other in the direction in which the peripheral edge extends and are separate from each other. The first member adheres the upper end of the second peripheral edge and the first peripheral edge to the housing. The second member adheres at least a portion of the second peripheral edge below the upper end to the housing. The display device according to claim 1 or 2.

Images