WO2023276095A1 - Display device - Google Patents

Display device Download PDF

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Publication number
WO2023276095A1
WO2023276095A1 PCT/JP2021/024900 JP2021024900W WO2023276095A1 WO 2023276095 A1 WO2023276095 A1 WO 2023276095A1 JP 2021024900 W JP2021024900 W JP 2021024900W WO 2023276095 A1 WO2023276095 A1 WO 2023276095A1
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WO
WIPO (PCT)
Prior art keywords
housing
adhesive
display device
thickness
longitudinal direction
Prior art date
Application number
PCT/JP2021/024900
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French (fr)
Japanese (ja)
Inventor
祐輔 河合
健人 東堤
陽介 由井
Original Assignee
三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2021/024900 priority Critical patent/WO2023276095A1/en
Publication of WO2023276095A1 publication Critical patent/WO2023276095A1/en

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements

Definitions

  • the present disclosure relates to display devices.
  • Some display devices use an adhesive to fix the liquid crystal module.
  • Such a display device is disclosed in Patent Document 1, for example.
  • the liquid crystal module is fixed to the intermediate member using an adhesive.
  • This intermediate member is assumed to be a substrate.
  • the protective member of the liquid crystal module is fixed to the housing using an adhesive.
  • the protection member protects the display panel.
  • the material of the housing and the material of the protective member are different from each other, a difference in linear expansion occurs between them.
  • the housing or the protective member may warp.
  • the display device disclosed in Patent Document 1 uses an adhesive to fix a liquid crystal module to a substrate. Therefore, in the display device disclosed in Patent Document 1, the protection member of the liquid crystal module is not fixed to the housing using an adhesive, and the above problem cannot be solved.
  • the present disclosure has been made to solve the above problems, and provides a display device capable of suppressing warping caused by a difference in linear expansion between a housing and a protective member adhered thereto. intended to
  • a display device includes a housing;
  • the thickness of the adhesive applied along the lateral direction is thicker than the thickness of the adhesive applied along the longitudinal direction of the housing.
  • FIG. 1 is a front view showing the configuration of a display device according to Embodiment 1;
  • FIG. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1;
  • FIG. 2 is a cross-sectional view taken along line III-III in FIG. 1;
  • 4A and 4B are diagrams for explaining the effects of the display device according to the first embodiment;
  • FIG. 4A is a cross-sectional view of a conventional display device warped.
  • 4B is a cross-sectional view when the display device according to Embodiment 1 is warped.
  • FIG. FIG. 10 is a cross-sectional view showing the configuration of a display device according to Embodiment 2;
  • FIG. 12 is a cross-sectional view showing the configuration of a display device according to Embodiment 3;
  • FIG. 12 is a front view showing the configuration of a display device according to Embodiment 4;
  • 8 is a cross-sectional view taken along line VIII-VIII of FIG. 7;
  • FIG. FIG. 8 is a cross-sectional view taken along line IX-IX in FIG. 7;
  • FIG. 13 is a diagram showing the configuration of a display device according to Embodiment 5;
  • FIG. 10A is a diagram showing the adhesive application structure when the protection member of the liquid crystal module is viewed from the rear side.
  • FIG. 10B is a diagram showing another adhesive application structure when the protective member of the liquid crystal module is viewed from the rear side.
  • Embodiment 1 A display device according to Embodiment 1 will be described in detail with reference to FIGS. 1 to 4. FIG.
  • FIG. 1 is a front view showing the configuration of the display device according to Embodiment 1.
  • FIG. FIG. 2 is a cross-sectional view taken along the line II--II in FIG.
  • FIG. 3 is a cross-sectional view taken along line III--III in FIG.
  • the display device according to Embodiment 1 shown in FIGS. 1 to 3 is provided, for example, in the interior of a vehicle.
  • a display device has a rectangular shape as a whole when viewed from the front (inside the passenger compartment).
  • the display device also includes a housing 10 and a liquid crystal module 20 .
  • the liquid crystal module 20 is fixed to the housing 10 using an adhesive 50 . That is, in the display device, the liquid crystal module 20 is positioned in the front portion of the display device, and the housing 10 is positioned in the rear portion of the display device.
  • the housing 10 has a rectangular flat plate shape.
  • the housing 10 is made of resin, for example.
  • the housing 10 also has a flat surface 11 , a short-side surface 12 and a long-side convex surface 13 .
  • the flat surface 11 , the short-side surface 12 , and the long-side convex surface 13 constitute the front surface of the housing 10 and face the rear surface of the liquid crystal module 20 .
  • the flat surface 11 is a flat surface.
  • the short-side surface 12 and the long-side convex surface 13 are formed on the outer periphery of the flat surface 11 .
  • the short side surfaces 12 are provided on both left and right short side portions of the outer peripheral portion of the flat surface 11 . Specifically, the short-side surface 12 is provided on the short-side portion of the flat surface 11 so as to extend in the short-side direction (short-side direction) of the housing 10 . The short side surface 12 is formed flush with the flat surface 11 . Note that the short side surfaces 12 do not have to be flush with the flat surface 11 .
  • the short side surfaces 12 are areas to which the adhesive 50 is applied.
  • the adhesive 50 applied to the short side surfaces 12 is referred to as an adhesive 51 .
  • the adhesive 51 is applied over the entire short side surface 12 .
  • the long side convex surfaces 13 are provided on the upper and lower long side portions of the outer peripheral portion of the flat surface 11 . Specifically, the long-side convex surface 13 is provided on the long-side portion of the flat surface 11 so as to extend in the longitudinal direction (long-side direction) of the housing 10 . The long-side convex surface 13 protrudes forward from the short-side surface 12 . In other words, the long-side convex surface 13 protrudes from the short-side surface 12 toward the protection member 22 described later. Note that the longitudinal direction of the housing 10 is a direction substantially orthogonal to the lateral direction of the housing 10 .
  • the long-side convex surface 13 is a region to which the adhesive 50 is applied.
  • the adhesive 50 applied to the long side convex surface 13 is referred to as an adhesive 52 .
  • This adhesive 52 is applied to the entire area of the long side convex surface 13 .
  • the width of the short side surfaces 12 and the width of the long side convex surfaces 13 are substantially the same.
  • the two long-side convex surfaces 13 facing each other are arranged between the two short-side surfaces 12 facing each other. Therefore, in the housing 10, the short side surfaces 12 are extended as much as possible.
  • the liquid crystal module 20 has a rectangular flat plate shape.
  • the size of the liquid crystal module 20 is substantially the same as the size of the housing 10 .
  • Such liquid crystal module 20 is fixed to housing 10 using adhesives 51 and 52 .
  • the liquid crystal module 20 has a display panel 21 and a protective member 22 .
  • the display panel 21 has a rectangular flat plate shape.
  • the front surface of the display panel 21 is a display surface 21a.
  • An image (including video) can be displayed on the display surface 21a.
  • Such a display panel 21 is made of glass, for example.
  • the protective member 22 protects the display panel 21. Moreover, the protective member 22 has a rectangular flat plate shape. The protective member 22 is formed larger than the display panel 21 and has substantially the same size as the housing 10 . The display surface 21a of the display panel 21 is in contact with the central portion of the rear surface of the protective member 22 .
  • the protective member 22 is made of transparent glass, for example.
  • An outer peripheral portion 22a on the rear surface of the protective member 22 is a non-contact area with which the display surface 21a of the display panel 21 does not come into contact. That is, the outer peripheral portion 22a serving as the non-contact area is formed in a rectangular frame shape. A black sheet is attached to the outer peripheral portion 22a, or black printing is applied.
  • the short side portion of the outer peripheral portion 22 a is fixed to the short side surface 12 via an adhesive 51 .
  • Long side portions of the outer peripheral portion 22 a are fixed to the long side convex surface 13 via an adhesive 52 .
  • the adhesives 51 and 52 are arranged behind the black outer peripheral portion 22a and are hidden behind the outer peripheral portion 22a. never see
  • the thickness of the adhesive 51 interposed between the short side portions of the outer peripheral portion 22a and the short side surfaces 12 is equal to that of the long side portions and the long side convex surfaces 13 of the outer peripheral portion 22a. is thicker than the thickness of the adhesive 52 interposed between them.
  • the thinner the adhesive the higher the adhesive strength. Therefore, in the display device, by reducing the thickness of the adhesive 52, the adhesive force for bonding and fixing the liquid crystal module 20 to the housing 10 is improved.
  • the display device suppresses linear expansion by increasing the thickness of the adhesive 51, and as a result, suppresses warping.
  • gaps are formed between the ends of the adhesive 51 and the ends of the adhesive 52, respectively.
  • the end portion and the end portion of the adhesive 52 may be connected.
  • FIG. 4 is a diagram for explaining the effects of the display device according to Embodiment 1.
  • FIG. An arrow D1 shown in FIGS. 4A and 4B indicates the direction of linear expansion of the housing 10, and its length indicates the amount of linear expansion of the housing 10.
  • An arrow D2 indicates the direction of linear expansion of the liquid crystal module 20, and its length indicates the amount of linear expansion of the liquid crystal module 20.
  • An arrow D3 shown in FIG. 4B indicates the warp direction of the housing 10 toward the outside of the device.
  • the difference in linear expansion between them may cause warpage in the longitudinal direction of the display device.
  • the material of the housing 10 is resin and the material of the liquid crystal module 20 is glass
  • the linear expansion coefficient of the resin is larger than that of glass, so the housing 10 is larger than the liquid crystal module 20. It is easy to linearly expand.
  • the conventional display device shown in FIG. 4A has a structure in which the liquid crystal module 20 is fixed to the housing 10 using only an adhesive 53.
  • the thickness of the adhesive 53 extending in the lateral direction and the thickness of the adhesive 53 extending in the longitudinal direction are substantially the same. Note that the adhesive 53 extending in the longitudinal direction of the display device is omitted in FIG. 4A.
  • the housing 10 and the adhesive 53 are fixed to the housing 10. It thermally expands (thermally deforms) together with the liquid crystal module 20 .
  • the adhesive 53 extending in the lateral direction is thin, it cannot withstand the difference between the amount of linear expansion of the housing 10 and the amount of linear expansion of the liquid crystal module 20 . That is, the adhesive 53 extending in the lateral direction cannot absorb the difference in linear expansion therebetween. As a result, there is a possibility that the housing 10 having a larger coefficient of linear expansion, out of the housing 10 and the liquid crystal module 20, may be warped D3.
  • the warp D3 is a deformation of the housing 10 such that the central portion in the longitudinal direction swells toward the outside of the device.
  • FIG. 4B for example, when the temperature inside the vehicle interior becomes high and accordingly the display device according to Embodiment 1 is also kept at a high temperature, the housing 10 and the The liquid crystal module 20 fixed with the adhesives 51 and 52 both thermally expands. Note that the adhesive 52 extending in the longitudinal direction of the display device is omitted in FIG. 4B.
  • the adhesive 51 extending in the lateral direction is thick, it can withstand the difference between the amount of linear expansion of the housing 10 and the amount of linear expansion of the liquid crystal module 20 . That is, the adhesive 51 extending in the lateral direction can absorb the difference in linear expansion therebetween. As a result, the display device according to the first embodiment can suppress the warp that occurs in the housing 10 having a larger coefficient of linear expansion out of the housing 10 and the liquid crystal module 20 .
  • the thickness of the adhesive 51 by increasing the thickness of the adhesive 51, the linear expansion difference between the housing 10 and the liquid crystal module 20 is absorbed, and the longitudinal direction of the housing 10 is reduced. Curvature can be suppressed.
  • the adhesive force between the housing 10 and the liquid crystal module 20 may decrease due to the increased thickness of the adhesive 51 . Therefore, in the display device, the thickness of the adhesive 51 extending in the lateral direction is increased, and the thickness of the adhesive 52 extending in the longitudinal direction is decreased to compensate for the decrease in adhesive strength, thereby improving the adhesive strength.
  • the display device according to the first embodiment is provided on the housing 10 and the display surface 21 a of the display panel 21 , and the non-contact areas that do not contact the display surface 21 a are attached to the housing 10 via the adhesives 51 and 52 . and a fixed protective member 22 .
  • the thickness of adhesive 51 applied along the lateral direction of housing 10 is greater than the thickness of adhesive 52 applied along the longitudinal direction of housing 10 . Therefore, the display device can suppress warpage caused by a difference in linear expansion between the housing 10 and the protective member 22 adhered thereto.
  • Embodiment 2 A display device according to Embodiment 2 will be described with reference to FIG.
  • FIG. 5 is a cross-sectional view showing the configuration of the display device according to the second embodiment. It should be noted that configurations having functions similar to those of the configuration described in Embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted.
  • the display device according to the second embodiment includes a long-side convex surface 13A instead of the long-side convex surface 13 of the display device according to the first embodiment.
  • the long-side convex surface 13A is gradually lowered from the central portion in the longitudinal direction toward the outer side in the longitudinal direction.
  • the long-side convex surface 13A gradually moves away from the protective member 22 from the longitudinal central portion toward the longitudinal outer side. Therefore, the thickness of the adhesive 52 applied to the long-side convex surface 13A increases continuously from the longitudinal center of the housing 10 toward the longitudinal outer side.
  • FIG. 5 shows an example in which the ends of the long-side convex surfaces 13A are at the same height as the short-side surfaces 12, the ends of the long-side convex surfaces 13A must be at the same height as the short-side surfaces 12. I don't mind.
  • the difference in linear expansion between the housing 10 and the liquid crystal module 20 is minimized by using the adhesive 52 whose thickness continuously increases from the central portion in the longitudinal direction toward the outer side in the longitudinal direction. can be absorbed, and warping of the housing 10 in the longitudinal direction can be suppressed.
  • the thickness of the adhesive 52 applied along the longitudinal direction of the housing 10 is continuous from the central portion in the longitudinal direction of the housing 10 toward the outside in the longitudinal direction. significantly thicker. Therefore, the display device can more effectively suppress longitudinal warp in the housing 10 caused by the difference in linear expansion between the housing 10 and the protective member 22 adhered thereto.
  • Embodiment 3 A display device according to Embodiment 3 will be described with reference to FIG.
  • FIG. 6 is a cross-sectional view showing the configuration of the display device according to Embodiment 3.
  • FIG. 6 It should be noted that configurations having functions similar to those of the configuration described in Embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted.
  • the display device according to Embodiment 6 has concave long-side surfaces 14 outside the convex long-side surfaces 13 in the longitudinal direction.
  • the long side concave surface 14 is formed at a position lower than the long side convex surface 13 .
  • the long side concave surface 14 is further away from the protective member 22 than the long side convex surface 13 is.
  • the thickness of the adhesive 52 applied to the long side concave surface 14 is greater than the thickness of the adhesive 52 applied to the long side convex surface 13 . Therefore, the thickness of the adhesive 52 applied to the long-side convex surface 13 and the long-side concave surface 14 increases stepwise from the longitudinal center of the housing 10 toward the longitudinal outer side.
  • FIG. 6 shows an example in which the long-side concave surface 14 has the same height as the short-side surface 12 , the long-side concave surface 14 does not have to have the same height as the short-side surface 12 .
  • the display device uses the adhesive 52 with thickened ends to absorb the difference in linear expansion between the housing 10 and the liquid crystal module 20, thereby preventing warping of the housing 10 in the longitudinal direction. can be suppressed.
  • the thickness of the adhesive 52 applied along the longitudinal direction of the housing 10 gradually increases from the longitudinal center of the housing 10 toward the longitudinal outer side. significantly thicker. Therefore, the display device can more effectively suppress longitudinal warp in the housing 10 caused by the difference in linear expansion between the housing 10 and the protective member 22 adhered thereto.
  • Embodiment 4 A display device according to Embodiment 4 will be described with reference to FIGS. 7 to 9. FIG.
  • FIG. 7 is a front view showing the configuration of the display device according to Embodiment 4.
  • FIG. 8 is a cross-sectional view taken along line VIII-VIII of FIG. 7.
  • FIG. 9 is a cross-sectional view taken along line IX-IX of FIG. 7.
  • configurations having functions similar to those of the configuration described in Embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted.
  • the thickness of the adhesive 52 increases from the center in the longitudinal direction of the display device toward the outside in the longitudinal direction
  • the thickness of the adhesive 51 increases from the center in the width direction of the display device to the outside in the width direction of the display device.
  • the thickness may be increased continuously or stepwise. 7 to 9 show configuration examples for increasing the thicknesses of the adhesives 51 and 52 in stages.
  • the housing 10 has a concave surface 15 as shown in FIGS.
  • the concave surfaces 15 are provided at four corners of the flat surface 11 of the housing 10 .
  • the concave surface 15 is recessed rearward from the short-side surface 12 and the long-side convex surface 13 .
  • the concave surface 15 is farther from the protective member 22 than the short-side surface 12 and the long-side convex surface 13 are.
  • the concave surface 15 connects the ends of the short-side surfaces 12 and the ends of the long-side convex surfaces 13 located at the same corners.
  • the adhesive 51 is applied over the short side surfaces 12 and the concave surface 15 .
  • the adhesive 52 is applied over the long side convex surface 13 and the concave surface 15 . For this reason, the adhesive 51 and the adhesive 52 are connected to each other at each corner and form a rectangular frame shape as a whole.
  • t1 be the thickness of the adhesive 52 applied to the long-side convex surface 13
  • t2 be the thickness of the adhesive 51 applied to the short-side surface 12
  • t2 be the thickness of the adhesive 51 applied to the concave surface 15.
  • t3 the thicknesses t1, t2 and t3 have a relational expression of "t3>t2>t1".
  • each range of thicknesses t1, t2, and t3 is indicated by a dotted line frame.
  • the linear expansion of a material due to thermal load increases with increasing distance from the center of the material.
  • the display device by providing the concave surface 15 at the portion where the end of the short side surface 12 and the end of the long side convex surface 13 are connected, the thickness of the adhesive 51 at both ends in the short side direction is reduced. , and the thickness of the adhesive 52 at both ends in the longitudinal direction is the thickest. Therefore, the display device can suppress warping in the lateral direction by suppressing linear expansion in the lateral direction. In addition, the display device can suppress warping in the longitudinal direction by suppressing linear expansion in the longitudinal direction.
  • the thickness of the adhesive 51 applied along the widthwise direction of the housing 10 extends from the widthwise center of the housing 10 toward the widthwise outside. It thickens continuously or stepwise according to Therefore, the display device can more effectively suppress warpage in the lateral direction of the housing 10 caused by the difference in linear expansion between the housing 10 and the protective member 22 adhered thereto.
  • the thickness of the adhesive 52 applied along the longitudinal direction of the housing 10 is t1
  • the thickness of the adhesive 51 applied along the lateral direction of the housing 10 is t1.
  • t2 and the adhesive 52 applied along the longitudinal direction of the housing 10 and the adhesive 51 applied along the lateral direction of the housing 10 are connected to each other at the corners of the housing 10. Assuming that the thickness of the portion is t3, the relationship t3>t2>t1 holds. Therefore, the display device can suppress both warping in the longitudinal direction and warping in the lateral direction of the housing 10 .
  • Embodiment 5 A display device according to Embodiment 5 will be described with reference to FIG.
  • FIG. 10 is a diagram showing the configuration of the display device according to the fifth embodiment. It should be noted that configurations having functions similar to those of the configuration described in Embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted.
  • the display device according to Embodiment 5 has an oval shape as a whole when viewed from the front of the display device. Therefore, as shown in FIG. 10A, the protective member 23 has an elliptical shape when viewed from the front.
  • the short-side surface 12 and the long-side convex surface 13 (not shown) of the housing 10 are curved along the outer peripheral portion 23 a of the protective member 23 .
  • An adhesive 51 is applied to the short side surfaces 12 .
  • An adhesive 52 is applied to the convex surface 13 on the long side. Therefore, the display device can absorb the linear expansion difference in the longitudinal direction (major axis direction) by the adhesive 51 applied to the short side surfaces 12 . Therefore, the display device can suppress warping in the longitudinal direction.
  • the housing 10 may have a straight short side surface 12 (not shown). This short side surface 12 extends in a direction orthogonal to the longitudinal direction. An adhesive 51 is applied to the short side surfaces 12 .
  • the display device according to the fifth embodiment is provided on the housing 10 and the display surface 21 a of the display panel 21 , and the non-contact regions that do not contact the display surface 21 a are attached to the housing 10 via the adhesives 51 and 52 . and a fixed protective member 23 .
  • the thickness of adhesive 51 applied along the lateral direction of housing 10 is greater than the thickness of adhesive 52 applied along the longitudinal direction of housing 10 . Therefore, the display device can suppress warping caused by a difference in linear expansion between the housing 10 and the protective member 23 adhered thereto.
  • the present disclosure can freely combine each embodiment, modify any component of each embodiment, or omit any component in each embodiment. .
  • the thickness of the adhesive applied along the lateral direction of the housing is thicker than the thickness of the adhesive applied along the longitudinal direction of the housing. Warping due to the difference in linear expansion between the body and the protective member can be suppressed, making it suitable for use in display devices and the like.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

This display device comprises: a housing (10); and a protective member (22) provided on a display surface (21a) of a display panel (21), the protective member (22) being such that non-contact regions thereof that do not contact the display surface (21a) are fixed to the housing (10) via adhesives (51, 52). The thickness of the adhesive (51) applied along the short direction of the housing (10) is greater than the thickness of the adhesive (52) applied along the longer direction of the housing (10).

Description

表示装置Display device
　本開示は、表示装置に関する。 The present disclosure relates to display devices.
　表示装置には、液晶モジュールを接着剤を用いて固定するものがある。このような表示装置は、例えば、特許文献１に開示されている。 Some display devices use an adhesive to fix the liquid crystal module. Such a display device is disclosed in Patent Document 1, for example.
特開２０１６－１９４６７０号公報JP 2016-194670 A
　特許文献１に開示された表示装置においては、液晶モジュールは、接着剤を用いて中間部材に固定されている。この中間部材は、基板を想定するものである。 In the display device disclosed in Patent Document 1, the liquid crystal module is fixed to the intermediate member using an adhesive. This intermediate member is assumed to be a substrate.
　ところで、表示装置には、液晶モジュールの保護部材を接着剤を用いて筐体に固定するものがある。保護部材は、表示パネルを保護するものである。このとき、筐体の材質と保護部材の材質とが互いに異なる場合、それらの間に、線膨張差が生じる。このように、筐体と保護部材との間において、線膨張差が生じると、筐体又は保護部材に反りが発生するおそれがある。 By the way, in some display devices, the protective member of the liquid crystal module is fixed to the housing using an adhesive. The protection member protects the display panel. At this time, if the material of the housing and the material of the protective member are different from each other, a difference in linear expansion occurs between them. Thus, if there is a difference in linear expansion between the housing and the protective member, the housing or the protective member may warp.
　特許文献１に開示された表示装置は、液晶モジュールを接着剤を用いて基板に固定するものである。このため、特許文献１に開示された表示装置は、液晶モジュールの保護部材が接着剤を用いて筐体に固定されるものではなく、上記課題を解決できるものではない。 The display device disclosed in Patent Document 1 uses an adhesive to fix a liquid crystal module to a substrate. Therefore, in the display device disclosed in Patent Document 1, the protection member of the liquid crystal module is not fixed to the housing using an adhesive, and the above problem cannot be solved.
　本開示は、上記のような課題を解決するためになされたもので、筐体とこれに接着固定される保護部材との間の線膨張差によって生じる反りを、抑えることができる表示装置を提供することを目的とする。 The present disclosure has been made to solve the above problems, and provides a display device capable of suppressing warping caused by a difference in linear expansion between a housing and a protective member adhered thereto. intended to
　本開示に係る表示装置は、筐体と、表示パネルの表示面に設けられ、表示面と接触しない非接触領域が接着剤を介して筐体に固定される保護部材とを備え、筐体の短手方向に沿って塗布された接着剤の厚さは、筐体の長手方向に沿って塗布された接着剤の厚さよりも厚いものである。 A display device according to the present disclosure includes a housing; The thickness of the adhesive applied along the lateral direction is thicker than the thickness of the adhesive applied along the longitudinal direction of the housing.
　本開示によれば、筐体とこれに接着固定される保護部材との間の線膨張差によって生じる反りを、抑えることができる。 According to the present disclosure, it is possible to suppress warpage caused by the difference in linear expansion between the housing and the protective member adhered thereto.
実施の形態１に係る表示装置の構成を示す正面図である。1 is a front view showing the configuration of a display device according to Embodiment 1; FIG. 図１のII－II矢視断面図である。FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1; 図１のIII－III矢視断面図である。FIG. 2 is a cross-sectional view taken along line III-III in FIG. 1; 実施の形態１に係る表示装置の作用効果を説明するための図である。図４Ａは、従来の表示装置に反りが生じたときの断面図である。図４Ｂは、実施の形態１に係る表示装置に反りが生じたときの断面図である。4A and 4B are diagrams for explaining the effects of the display device according to the first embodiment; FIG. FIG. 4A is a cross-sectional view of a conventional display device warped. 4B is a cross-sectional view when the display device according to Embodiment 1 is warped. FIG. 実施の形態２に係る表示装置の構成を示す断面図である。FIG. 10 is a cross-sectional view showing the configuration of a display device according to Embodiment 2; 実施の形態３に係る表示装置の構成を示す断面図である。FIG. 12 is a cross-sectional view showing the configuration of a display device according to Embodiment 3; 実施の形態４に係る表示装置の構成を示す正面図である。FIG. 12 is a front view showing the configuration of a display device according to Embodiment 4; 図７のVIII－VIII矢視断面図である。8 is a cross-sectional view taken along line VIII-VIII of FIG. 7; FIG. 図７のIX－IX矢視断面図である。FIG. 8 is a cross-sectional view taken along line IX-IX in FIG. 7; 実施の形態５に係る表示装置の構成を示す図である。図１０Ａは、液晶モジュールの保護部材を後方側から見たときの接着剤塗布構造を示す図である。図１０Ｂは、液晶モジュールの保護部材を後方側から見たときの他の接着剤塗布構造を示す図である。FIG. 13 is a diagram showing the configuration of a display device according to Embodiment 5; FIG. 10A is a diagram showing the adhesive application structure when the protection member of the liquid crystal module is viewed from the rear side. FIG. 10B is a diagram showing another adhesive application structure when the protective member of the liquid crystal module is viewed from the rear side.
　以下、本開示をより詳細に説明するために、本開示を実施するための形態について、添付の図面に従って説明する。 Hereinafter, in order to describe the present disclosure in more detail, embodiments for carrying out the present disclosure will be described according to the attached drawings.
実施の形態１．
　実施の形態１に係る表示装置について、図１から図４を用いて詳細に説明する。 Embodiment 1.
A display device according to Embodiment 1 will be described in detail with reference to FIGS. 1 to 4. FIG.
　図１は、実施の形態１に係る表示装置の構成を示す正面図である。図２は、図１のII－II矢視断面図である。図３は、図１のIII－III矢視断面図である。 FIG. 1 is a front view showing the configuration of the display device according to Embodiment 1. FIG. FIG. 2 is a cross-sectional view taken along the line II--II in FIG. FIG. 3 is a cross-sectional view taken along line III--III in FIG.
　図１から図３に示す実施の形態１に係る表示装置は、例えば、車両の車室内に設けられている。このような表示装置は、正面（車室の内側）から見て、全体として矩形をなしている。また、表示装置は、筐体１０及び液晶モジュール２０を備えている。液晶モジュール２０は、接着剤５０を用いて、筐体１０に固定されている。即ち、表示装置においては、液晶モジュール２０が表示装置の前部に位置し、筐体１０が表示装置の後部に位置している。 The display device according to Embodiment 1 shown in FIGS. 1 to 3 is provided, for example, in the interior of a vehicle. Such a display device has a rectangular shape as a whole when viewed from the front (inside the passenger compartment). The display device also includes a housing 10 and a liquid crystal module 20 . The liquid crystal module 20 is fixed to the housing 10 using an adhesive 50 . That is, in the display device, the liquid crystal module 20 is positioned in the front portion of the display device, and the housing 10 is positioned in the rear portion of the display device.
　図１から図３に示すように、筐体１０は、矩形平板状をなしている。この筐体１０は、例えば、樹脂で形成されている。また、筐体１０は、平坦面１１、短辺面１２、及び、長辺凸面１３を有している。平坦面１１、短辺面１２、及び、長辺凸面１３は、筐体１０の前面を構成し、液晶モジュール２０の後面と対向している。 As shown in FIGS. 1 to 3, the housing 10 has a rectangular flat plate shape. The housing 10 is made of resin, for example. The housing 10 also has a flat surface 11 , a short-side surface 12 and a long-side convex surface 13 . The flat surface 11 , the short-side surface 12 , and the long-side convex surface 13 constitute the front surface of the housing 10 and face the rear surface of the liquid crystal module 20 .
　平坦面１１は、平坦な面である。短辺面１２及び長辺凸面１３は、その平坦面１１の外周部に形成されている。 The flat surface 11 is a flat surface. The short-side surface 12 and the long-side convex surface 13 are formed on the outer periphery of the flat surface 11 .
　短辺面１２は、平坦面１１の外周部のうち、左右両側の短辺部に設けられている。具体的には、短辺面１２は、平坦面１１の短辺部において、筐体１０の短手方向（短辺方向）に延びるように設けられている。この短辺面１２は、平坦面１１と面一に形成されている。なお、短辺面１２は、平坦面１１と面一でなくても良い。 The short side surfaces 12 are provided on both left and right short side portions of the outer peripheral portion of the flat surface 11 . Specifically, the short-side surface 12 is provided on the short-side portion of the flat surface 11 so as to extend in the short-side direction (short-side direction) of the housing 10 . The short side surface 12 is formed flush with the flat surface 11 . Note that the short side surfaces 12 do not have to be flush with the flat surface 11 .
　また、短辺面１２は、接着剤５０が塗布される領域である。ここで、短辺面１２に塗布される接着剤５０を、接着剤５１とする。この接着剤５１は、短辺面１２の全域に塗布される。 In addition, the short side surfaces 12 are areas to which the adhesive 50 is applied. Here, the adhesive 50 applied to the short side surfaces 12 is referred to as an adhesive 51 . The adhesive 51 is applied over the entire short side surface 12 .
　長辺凸面１３は、平坦面１１の外周部のうち、上下両側の長辺部に設けられている。具体的には、長辺凸面１３は、平坦面１１の長辺部において、筐体１０の長手方向（長辺方向）に延びるように設けられている。この長辺凸面１３は、短辺面１２よりも前方側に向けて突出している。言い換えれば、長辺凸面１３は、短辺面１２よりも、後述する保護部材２２側に向けて突出している。なお、筐体１０の長手方向は、筐体１０の短手方向と略直交する方向である。 The long side convex surfaces 13 are provided on the upper and lower long side portions of the outer peripheral portion of the flat surface 11 . Specifically, the long-side convex surface 13 is provided on the long-side portion of the flat surface 11 so as to extend in the longitudinal direction (long-side direction) of the housing 10 . The long-side convex surface 13 protrudes forward from the short-side surface 12 . In other words, the long-side convex surface 13 protrudes from the short-side surface 12 toward the protection member 22 described later. Note that the longitudinal direction of the housing 10 is a direction substantially orthogonal to the lateral direction of the housing 10 .
　また、長辺凸面１３は、接着剤５０が塗布される領域である。ここで、長辺凸面１３に塗布される接着剤５０を、接着剤５２とする。この接着剤５２は、長辺凸面１３の全域に塗布される。 Also, the long-side convex surface 13 is a region to which the adhesive 50 is applied. Here, the adhesive 50 applied to the long side convex surface 13 is referred to as an adhesive 52 . This adhesive 52 is applied to the entire area of the long side convex surface 13 .
　そして、短辺面１２の幅と長辺凸面１３の幅とは、略同じ幅となっている。対向する２つの長辺凸面１３は、対向する２つの短辺面１２間に配置されている。このため、筐体１０においては、可能な限り、短辺面１２の延長化が図られている。 The width of the short side surfaces 12 and the width of the long side convex surfaces 13 are substantially the same. The two long-side convex surfaces 13 facing each other are arranged between the two short-side surfaces 12 facing each other. Therefore, in the housing 10, the short side surfaces 12 are extended as much as possible.
　図１から図３に示すように、液晶モジュール２０は、矩形平板状をなしている。この液晶モジュール２０の大きさは、筐体１０の大きさと略同じ大きさとなっている。このような液晶モジュール２０は、接着剤５１，５２を用いて、筐体１０に固定されている。また、液晶モジュール２０は、表示パネル２１及び保護部材２２を有している。 As shown in FIGS. 1 to 3, the liquid crystal module 20 has a rectangular flat plate shape. The size of the liquid crystal module 20 is substantially the same as the size of the housing 10 . Such liquid crystal module 20 is fixed to housing 10 using adhesives 51 and 52 . Also, the liquid crystal module 20 has a display panel 21 and a protective member 22 .
　表示パネル２１は、矩形平板状をなしている。この表示パネル２１の前面は、表示面２１ａとなっている。表示面２１ａには、画像（映像を含む）が表示可能となっている。このような、表示パネル２１は、例えば、ガラスで形成されている。 The display panel 21 has a rectangular flat plate shape. The front surface of the display panel 21 is a display surface 21a. An image (including video) can be displayed on the display surface 21a. Such a display panel 21 is made of glass, for example.
　保護部材２２は、表示パネル２１を保護するものである。また、保護部材２２は、矩形平板状をなしている。この保護部材２２は、表示パネル２１よりも大きく形成されており、筐体１０の大きさと略同じである。表示パネル２１の表示面２１ａは、保護部材２２の後面中央部に接触している。保護部材２２は、例えば、透明なガラスで形成されている。 The protective member 22 protects the display panel 21. Moreover, the protective member 22 has a rectangular flat plate shape. The protective member 22 is formed larger than the display panel 21 and has substantially the same size as the housing 10 . The display surface 21a of the display panel 21 is in contact with the central portion of the rear surface of the protective member 22 . The protective member 22 is made of transparent glass, for example.
　保護部材２２の後面における外周部２２ａは、表示パネル２１の表示面２１ａが接触しない非接触領域となっている。即ち、非接触領域となる外周部２２ａは、矩形の枠状に形成されている。その外周部２２ａには、黒色のシートが貼り付けられるか、又は、黒色の印刷が施されている。 An outer peripheral portion 22a on the rear surface of the protective member 22 is a non-contact area with which the display surface 21a of the display panel 21 does not come into contact. That is, the outer peripheral portion 22a serving as the non-contact area is formed in a rectangular frame shape. A black sheet is attached to the outer peripheral portion 22a, or black printing is applied.
　外周部２２ａの短辺部分は、接着剤５１を介して、短辺面１２に固定されている。また、外周部２２ａの長辺部分は、接着剤５２を介して、長辺凸面１３に固定されている。このとき、接着剤５１，５２は、黒色の外周部２２ａの後方に配置されて、当該外周部２２ａに隠れるため、ユーザが液晶モジュール２０を覗き込んだ場合でも、当該ユーザが接着剤５１，５２を目にすることはない。 The short side portion of the outer peripheral portion 22 a is fixed to the short side surface 12 via an adhesive 51 . Long side portions of the outer peripheral portion 22 a are fixed to the long side convex surface 13 via an adhesive 52 . At this time, the adhesives 51 and 52 are arranged behind the black outer peripheral portion 22a and are hidden behind the outer peripheral portion 22a. never see
　従って、上述した構成をなすことにより、外周部２２ａの短辺部分と短辺面１２との間に介在される接着剤５１の厚さは、外周部２２ａの長辺部分と長辺凸面１３との間に介在される接着剤５２の厚さよりも厚くなる。一般に、接着剤は、厚みが薄くなる程、接着力が高くなる。よって、表示装置は、接着剤５２の厚さを薄くすることにより、液晶モジュール２０を筐体１０に接着固定するための接着力を、向上させている。また、表示装置は、接着剤５１の厚さを厚くすることにより、線膨張を抑えて、結果的に、反りを抑える。 Therefore, with the configuration described above, the thickness of the adhesive 51 interposed between the short side portions of the outer peripheral portion 22a and the short side surfaces 12 is equal to that of the long side portions and the long side convex surfaces 13 of the outer peripheral portion 22a. is thicker than the thickness of the adhesive 52 interposed between them. In general, the thinner the adhesive, the higher the adhesive strength. Therefore, in the display device, by reducing the thickness of the adhesive 52, the adhesive force for bonding and fixing the liquid crystal module 20 to the housing 10 is improved. In addition, the display device suppresses linear expansion by increasing the thickness of the adhesive 51, and as a result, suppresses warping.
　なお、図１及び図３に示すように、表示装置の四隅においては、接着剤５１の端部と接着剤５２の端部との間に、それぞれ隙間が形成されているが、接着剤５１の端部と接着剤５２の端部とは繋がっていても構わない。 As shown in FIGS. 1 and 3, at the four corners of the display device, gaps are formed between the ends of the adhesive 51 and the ends of the adhesive 52, respectively. The end portion and the end portion of the adhesive 52 may be connected.
　次に、実施の形態１に係る表示装置の作用効果について、従来の表示装置での問題を述べつつ、図４を用いて説明する。 Next, the effects of the display device according to Embodiment 1 will be described with reference to FIG. 4 while describing problems with conventional display devices.
　図４は、実施の形態１に係る表示装置の作用効果を説明するための図である。図４Ａ及び図４Ｂに記載した矢印Ｄ１は、筐体１０の線膨張方向を示し、その長さは、筐体１０の線膨張量を示している。また、矢印Ｄ２は、液晶モジュール２０の線膨張方向を示し、その長さは、液晶モジュール２０の線膨張量を示している。また、図４Ｂに記載した矢印Ｄ３は、筐体１０の装置外側への反り方向を示している。 FIG. 4 is a diagram for explaining the effects of the display device according to Embodiment 1. FIG. An arrow D1 shown in FIGS. 4A and 4B indicates the direction of linear expansion of the housing 10, and its length indicates the amount of linear expansion of the housing 10. As shown in FIG. An arrow D2 indicates the direction of linear expansion of the liquid crystal module 20, and its length indicates the amount of linear expansion of the liquid crystal module 20. As shown in FIG. An arrow D3 shown in FIG. 4B indicates the warp direction of the housing 10 toward the outside of the device.
　ここで、表示装置において、筐体１０の材質と液晶モジュール２０の材質とが互いに異なる場合、それらの間の線膨張差によって、表示装置の長手方向において、反りが発生するおそれがある。例えば、筐体１０の材質が樹脂であり、液晶モジュール２０の材質がガラスである場合、樹脂の線膨張係数がガラスの線膨張係数よりも大きいため、筐体１０の方が液晶モジュール２０よりも線膨張し易い。 Here, in the display device, if the material of the housing 10 and the material of the liquid crystal module 20 are different from each other, the difference in linear expansion between them may cause warpage in the longitudinal direction of the display device. For example, when the material of the housing 10 is resin and the material of the liquid crystal module 20 is glass, the linear expansion coefficient of the resin is larger than that of glass, so the housing 10 is larger than the liquid crystal module 20. It is easy to linearly expand.
　図４Ａに示す従来の表示装置は、液晶モジュール２０を接着剤５３のみを用いて筐体１０に固定する構造を備えている。短手方向に延びる接着剤５３の厚さと、長手方向に延びる接着剤５３の厚さとは、略同じ厚さとなっている。なお、図４Ａにおいては、表示装置の長手方向に延びる接着剤５３を省略している。 The conventional display device shown in FIG. 4A has a structure in which the liquid crystal module 20 is fixed to the housing 10 using only an adhesive 53. The thickness of the adhesive 53 extending in the lateral direction and the thickness of the adhesive 53 extending in the longitudinal direction are substantially the same. Note that the adhesive 53 extending in the longitudinal direction of the display device is omitted in FIG. 4A.
　図４Ａに示すように、例えば、車室内が高温となり、これに伴って、従来の表示装置においても、高温に保持された場合、筐体１０と、これに接着剤５３を用いて固定された液晶モジュール２０とは、共に熱膨張（熱変形）する。 As shown in FIG. 4A, for example, when the temperature in the vehicle interior becomes high and accordingly, even in the conventional display device, when the temperature is maintained at a high temperature, the housing 10 and the adhesive 53 are fixed to the housing 10. It thermally expands (thermally deforms) together with the liquid crystal module 20 .
　このとき、短手方向に延びる接着剤５３は、その厚さが薄いため、筐体１０の線膨張量と液晶モジュール２０の線膨張量との間の差に、耐えることができない。即ち、短手方向に延びる接着剤５３は、それらの間の線膨張差を吸収することができない。この結果、筐体１０及び液晶モジュール２０のうち、線膨張係数が大きい方の筐体１０には、反りＤ３が発生するおそれがある。この反りＤ３は、筐体１０が、その長手方向中央部が装置外側に向けて膨らむような、変形のことである。 At this time, since the adhesive 53 extending in the lateral direction is thin, it cannot withstand the difference between the amount of linear expansion of the housing 10 and the amount of linear expansion of the liquid crystal module 20 . That is, the adhesive 53 extending in the lateral direction cannot absorb the difference in linear expansion therebetween. As a result, there is a possibility that the housing 10 having a larger coefficient of linear expansion, out of the housing 10 and the liquid crystal module 20, may be warped D3. The warp D3 is a deformation of the housing 10 such that the central portion in the longitudinal direction swells toward the outside of the device.
　これに対して、図４Ｂに示すように、例えば、車室内が高温となり、これに伴って、実施の形態１に係る表示装置においても、高温に保持された場合、筐体１０と、これに接着剤５１，５２を用いて固定された液晶モジュール２０とは、共に熱膨張する。なお、図４Ｂにおいては、表示装置の長手方向に延びる接着剤５２を省略している。 On the other hand, as shown in FIG. 4B , for example, when the temperature inside the vehicle interior becomes high and accordingly the display device according to Embodiment 1 is also kept at a high temperature, the housing 10 and the The liquid crystal module 20 fixed with the adhesives 51 and 52 both thermally expands. Note that the adhesive 52 extending in the longitudinal direction of the display device is omitted in FIG. 4B.
　このとき、短手方向に延びる接着剤５１は、その厚さが厚いため、筐体１０の線膨張量と液晶モジュール２０の線膨張量との間の差に、耐えることができる。即ち、短手方向に延びる接着剤５１は、それらの間の線膨張差を吸収することができる。この結果、実施の形態１に係る表示装置は、筐体１０及び液晶モジュール２０のうち、線膨張係数が大きい方の筐体１０に発生する反りを、抑えることができる。 At this time, since the adhesive 51 extending in the lateral direction is thick, it can withstand the difference between the amount of linear expansion of the housing 10 and the amount of linear expansion of the liquid crystal module 20 . That is, the adhesive 51 extending in the lateral direction can absorb the difference in linear expansion therebetween. As a result, the display device according to the first embodiment can suppress the warp that occurs in the housing 10 having a larger coefficient of linear expansion out of the housing 10 and the liquid crystal module 20 .
　従って、実施の形態１に係る表示装置は、接着剤５１の厚さを厚くすることにより、筐体１０と液晶モジュール２０との間の線膨張差を吸収して、筐体１０の長手方向の反りを抑えることができる。このとき、表示装置においては、接着剤５１の厚さが厚くなった分、筐体１０と液晶モジュール２０との間の接着力が低下するおそれがある。そこで、表示装置においては、短手方向に延びる接着剤５１を厚くて、接着力が低下した分、長手方向に延びる接着剤５２の厚さを薄くして、接着力を向上させている。 Therefore, in the display device according to the first embodiment, by increasing the thickness of the adhesive 51, the linear expansion difference between the housing 10 and the liquid crystal module 20 is absorbed, and the longitudinal direction of the housing 10 is reduced. Curvature can be suppressed. At this time, in the display device, the adhesive force between the housing 10 and the liquid crystal module 20 may decrease due to the increased thickness of the adhesive 51 . Therefore, in the display device, the thickness of the adhesive 51 extending in the lateral direction is increased, and the thickness of the adhesive 52 extending in the longitudinal direction is decreased to compensate for the decrease in adhesive strength, thereby improving the adhesive strength.
　以上、実施の形態１に係る表示装置は、筐体１０と、表示パネル２１の表示面２１ａに設けられ、表示面２１ａと接触しない非接触領域が接着剤５１，５２を介して筐体１０に固定される保護部材２２とを備える。筐体１０の短手方向に沿って塗布された接着剤５１の厚さは、筐体１０の長手方向に沿って塗布された接着剤５２の厚さよりも厚い。このため、表示装置は、筐体１０とこれに接着固定される保護部材２２との間の線膨張差によって生じる反りを、抑えることができる。 As described above, the display device according to the first embodiment is provided on the housing 10 and the display surface 21 a of the display panel 21 , and the non-contact areas that do not contact the display surface 21 a are attached to the housing 10 via the adhesives 51 and 52 . and a fixed protective member 22 . The thickness of adhesive 51 applied along the lateral direction of housing 10 is greater than the thickness of adhesive 52 applied along the longitudinal direction of housing 10 . Therefore, the display device can suppress warpage caused by a difference in linear expansion between the housing 10 and the protective member 22 adhered thereto.
実施の形態２．
　実施の形態２に係る表示装置について、図５を用いて説明する。 Embodiment 2.
A display device according to Embodiment 2 will be described with reference to FIG.
　図５は、実施の形態２に係る表示装置の構成を示す断面図である。なお、実施の形態１で説明した構成と同様の機能を有する構成については、同一の符号を付し、その説明を省略する。 FIG. 5 is a cross-sectional view showing the configuration of the display device according to the second embodiment. It should be noted that configurations having functions similar to those of the configuration described in Embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted.
　図５に示すように、実施の形態２に係る表示装置は、実施の形態１に係る表示装置の長辺凸面１３に替えて、長辺凸面１３Ａを備えている。長辺凸面１３Ａは、長手方向中央部から長手方向外側に向かうに従って、徐々に低下している。言い換えれば、長辺凸面１３Ａは、長手方向中央部から長手方向外側に向かうに従って、徐々に保護部材２２から遠ざかっている。このため、その長辺凸面１３Ａに塗布された接着剤５２の厚さは、筐体１０の長手方向中央部から長手方向外側に向かうに従って、連続的に厚くなる。 As shown in FIG. 5, the display device according to the second embodiment includes a long-side convex surface 13A instead of the long-side convex surface 13 of the display device according to the first embodiment. The long-side convex surface 13A is gradually lowered from the central portion in the longitudinal direction toward the outer side in the longitudinal direction. In other words, the long-side convex surface 13A gradually moves away from the protective member 22 from the longitudinal central portion toward the longitudinal outer side. Therefore, the thickness of the adhesive 52 applied to the long-side convex surface 13A increases continuously from the longitudinal center of the housing 10 toward the longitudinal outer side.
　なお、図５は、長辺凸面１３Ａの端部が短辺面１２と同じ高さとなる例を示しているが、長辺凸面１３Ａの端部は、短辺面１２と同じ高さでなくても構わない。 Although FIG. 5 shows an example in which the ends of the long-side convex surfaces 13A are at the same height as the short-side surfaces 12, the ends of the long-side convex surfaces 13A must be at the same height as the short-side surfaces 12. I don't mind.
　従って、表示装置は、厚さが長手方向中央部から長手方向外側に向かうに従って連続的に厚くなるようにした接着剤５２を用いることにより、筐体１０と液晶モジュール２０との間の線膨張差を吸収して、筐体１０の長手方向の反りを抑えることができる。 Therefore, in the display device, the difference in linear expansion between the housing 10 and the liquid crystal module 20 is minimized by using the adhesive 52 whose thickness continuously increases from the central portion in the longitudinal direction toward the outer side in the longitudinal direction. can be absorbed, and warping of the housing 10 in the longitudinal direction can be suppressed.
　以上、実施の形態２に係る表示装置においては、筐体１０の長手方向に沿って塗布された接着剤５２の厚さは、筐体１０の長手方向中央部から長手方向外側に向かうに従って、連続的に厚くなる。このため、表示装置は、筐体１０とこれに接着固定される保護部材２２との間の線膨張差によって生じる、筐体１０における長手方向の反りを、より効果的に抑えることができる。 As described above, in the display device according to the second embodiment, the thickness of the adhesive 52 applied along the longitudinal direction of the housing 10 is continuous from the central portion in the longitudinal direction of the housing 10 toward the outside in the longitudinal direction. significantly thicker. Therefore, the display device can more effectively suppress longitudinal warp in the housing 10 caused by the difference in linear expansion between the housing 10 and the protective member 22 adhered thereto.
実施の形態３．
　実施の形態３に係る表示装置について、図６を用いて説明する。 Embodiment 3.
A display device according to Embodiment 3 will be described with reference to FIG.
　図６は、実施の形態３に係る表示装置の構成を示す断面図である。なお、実施の形態１で説明した構成と同様の機能を有する構成については、同一の符号を付し、その説明を省略する。 FIG. 6 is a cross-sectional view showing the configuration of the display device according to Embodiment 3. FIG. It should be noted that configurations having functions similar to those of the configuration described in Embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted.
　図６に示すように、実施の形態６に係る表示装置は、長辺凸面１３の長手方向外側に、長辺凹面１４を備えている。この長辺凹面１４は、長辺凸面１３よりも低い位置に形成されている。言い換えれば、長辺凹面１４は、長辺凸面１３よりも保護部材２２から遠ざかっている。 As shown in FIG. 6, the display device according to Embodiment 6 has concave long-side surfaces 14 outside the convex long-side surfaces 13 in the longitudinal direction. The long side concave surface 14 is formed at a position lower than the long side convex surface 13 . In other words, the long side concave surface 14 is further away from the protective member 22 than the long side convex surface 13 is.
　このため、長辺凹面１４に塗布された接着剤５２の厚さは、長辺凸面１３に塗布された接着剤５２の厚さよりも厚くなる。よって、長辺凸面１３及び長辺凹面１４に塗布された接着剤５２の厚さは、筐体１０の長手方向中央部から長手方向外側に向かうに従って、段階的に厚くなる。 Therefore, the thickness of the adhesive 52 applied to the long side concave surface 14 is greater than the thickness of the adhesive 52 applied to the long side convex surface 13 . Therefore, the thickness of the adhesive 52 applied to the long-side convex surface 13 and the long-side concave surface 14 increases stepwise from the longitudinal center of the housing 10 toward the longitudinal outer side.
　なお、図６は、長辺凹面１４が短辺面１２と同じ高さとなる例を示しているが、長辺凹面１４は、短辺面１２と同じ高さでなくても構わない。 Although FIG. 6 shows an example in which the long-side concave surface 14 has the same height as the short-side surface 12 , the long-side concave surface 14 does not have to have the same height as the short-side surface 12 .
　従って、表示装置は、端部の厚さを厚くした接着剤５２を用いることにより、筐体１０と液晶モジュール２０との間の線膨張差を吸収して、筐体１０の長手方向の反りを抑えることができる。 Therefore, the display device uses the adhesive 52 with thickened ends to absorb the difference in linear expansion between the housing 10 and the liquid crystal module 20, thereby preventing warping of the housing 10 in the longitudinal direction. can be suppressed.
　以上、実施の形態３に係る表示装置においては、筐体１０の長手方向に沿って塗布された接着剤５２の厚さは、筐体１０の長手方向中央部から長手方向外側に向かうに従って、段階的に厚くなる。このため、表示装置は、筐体１０とこれに接着固定される保護部材２２との間の線膨張差によって生じる、筐体１０における長手方向の反りを、より効果的に抑えることができる。 As described above, in the display device according to the third embodiment, the thickness of the adhesive 52 applied along the longitudinal direction of the housing 10 gradually increases from the longitudinal center of the housing 10 toward the longitudinal outer side. significantly thicker. Therefore, the display device can more effectively suppress longitudinal warp in the housing 10 caused by the difference in linear expansion between the housing 10 and the protective member 22 adhered thereto.
実施の形態４．
　実施の形態４に係る表示装置について、図７から図９を用いて説明する。 Embodiment 4.
A display device according to Embodiment 4 will be described with reference to FIGS. 7 to 9. FIG.
　図７は、実施の形態４に係る表示装置の構成を示す正面図である。図８は、図７のVIII－VIII矢視断面図である。図９は、図７のIX－IX矢視断面図である。なお、実施の形態１で説明した構成と同様の機能を有する構成については、同一の符号を付し、その説明を省略する。 FIG. 7 is a front view showing the configuration of the display device according to Embodiment 4. FIG. 8 is a cross-sectional view taken along line VIII-VIII of FIG. 7. FIG. 9 is a cross-sectional view taken along line IX-IX of FIG. 7. FIG. It should be noted that configurations having functions similar to those of the configuration described in Embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted.
　筐体１０及び液晶モジュール２０の大きさによっては、長手方向の反りが発生するだけでなく、短手方向の反りも発生する場合がある。この場合、接着剤５２の厚さが、表示装置の長手方向中央部から長手方向外側に向かうに従って厚くなると共に、接着剤５１の厚さが、表示装置の短手方向中央部から短手方向外側に向かうに従って、連続的又は段階的に厚くなれば良い。図７から図９は、接着剤５１，５２の各厚さを段階的に厚くするための構成例を示したものである。 Depending on the size of the housing 10 and the liquid crystal module 20, not only warping in the longitudinal direction but also warping in the lateral direction may occur. In this case, the thickness of the adhesive 52 increases from the center in the longitudinal direction of the display device toward the outside in the longitudinal direction, and the thickness of the adhesive 51 increases from the center in the width direction of the display device to the outside in the width direction of the display device. , the thickness may be increased continuously or stepwise. 7 to 9 show configuration examples for increasing the thicknesses of the adhesives 51 and 52 in stages.
　図７から図９に示すように、筐体１０は、凹面１５を備えている。この凹面１５は、筐体１０の平坦面１１における４つの隅部にそれぞれ設けられている。凹面１５は、短辺面１２及び長辺凸面１３よりも、後方に向けて凹んでいる。言い換えれば、凹面１５は、短辺面１２及び長辺凸面１３よりも保護部材２２から遠ざかっている。また、凹面１５は、同じ隅部に位置する、短辺面１２の端部と長辺凸面１３の端部との間を繋いでいる。 The housing 10 has a concave surface 15 as shown in FIGS. The concave surfaces 15 are provided at four corners of the flat surface 11 of the housing 10 . The concave surface 15 is recessed rearward from the short-side surface 12 and the long-side convex surface 13 . In other words, the concave surface 15 is farther from the protective member 22 than the short-side surface 12 and the long-side convex surface 13 are. Further, the concave surface 15 connects the ends of the short-side surfaces 12 and the ends of the long-side convex surfaces 13 located at the same corners.
　接着剤５１は、短辺面１２及び凹面１５に亘って塗布されている。接着剤５２は、長辺凸面１３及び凹面１５に亘って塗布されている。このため、接着剤５１と接着剤５２とは、各隅部において互いに接続しており、全体として、矩形の枠状をなしている。 The adhesive 51 is applied over the short side surfaces 12 and the concave surface 15 . The adhesive 52 is applied over the long side convex surface 13 and the concave surface 15 . For this reason, the adhesive 51 and the adhesive 52 are connected to each other at each corner and form a rectangular frame shape as a whole.
　ここで、長辺凸面１３に塗布された接着剤５２の厚さをｔ１とし、短辺面１２に塗布された接着剤５１の厚さをｔ２とし、凹面１５に塗布された接着剤５１，５２の厚さをｔ３とした場合、厚さｔ１，ｔ２，ｔ３は、「ｔ３＞ｔ２＞ｔ１」の関係式を有する。図７においては、厚さｔ１，ｔ２，ｔ３の各範囲を、点線の枠でそれぞれ示している。 Here, let t1 be the thickness of the adhesive 52 applied to the long-side convex surface 13, t2 be the thickness of the adhesive 51 applied to the short-side surface 12, and t2 be the thickness of the adhesive 51 applied to the concave surface 15. t3, the thicknesses t1, t2 and t3 have a relational expression of "t3>t2>t1". In FIG. 7, each range of thicknesses t1, t2, and t3 is indicated by a dotted line frame.
　一般的に、熱負荷による材料の線膨張は、材料の中央部から離れる程、大きくなることが知られている。これに対して、表示装置は、短辺面１２の端部と長辺凸面１３の端部とが接続する部分に、凹面１５を設けることにより、接着剤５１の短手方向両端部の厚さ、及び、接着剤５２の長手方向両端部の厚さを、最も厚くしている。このため、表示装置は、短手方向の線膨張を抑えることで、短手方向の反りを抑えることができる。また、表示装置は、長手方向の線膨張を抑えることで、長手方向の反りを抑えることができる。 In general, it is known that the linear expansion of a material due to thermal load increases with increasing distance from the center of the material. On the other hand, in the display device, by providing the concave surface 15 at the portion where the end of the short side surface 12 and the end of the long side convex surface 13 are connected, the thickness of the adhesive 51 at both ends in the short side direction is reduced. , and the thickness of the adhesive 52 at both ends in the longitudinal direction is the thickest. Therefore, the display device can suppress warping in the lateral direction by suppressing linear expansion in the lateral direction. In addition, the display device can suppress warping in the longitudinal direction by suppressing linear expansion in the longitudinal direction.
　以上、実施の形態４に係る表示装置においては、筐体１０の短手方向に沿って塗布された接着剤５１の厚さは、筐体１０の短手方向中央部から短手方向外側に向かうに従って、連続的又は段階的に厚くなる。このため、表示装置は、筐体１０とこれに接着固定される保護部材２２との間の線膨張差によって生じる、筐体１０における短手方向の反りを、より効果的に抑えることができる。 As described above, in the display device according to the fourth embodiment, the thickness of the adhesive 51 applied along the widthwise direction of the housing 10 extends from the widthwise center of the housing 10 toward the widthwise outside. It thickens continuously or stepwise according to Therefore, the display device can more effectively suppress warpage in the lateral direction of the housing 10 caused by the difference in linear expansion between the housing 10 and the protective member 22 adhered thereto.
　また、表示装置においては、筐体１０の長手方向に沿って塗布された接着剤５２の厚さを、ｔ１とし、筐体１０の短手方向に沿って塗布された接着剤５１の厚さを、ｔ２とし、筐体１０の隅部において、筐体１０の長手方向に沿って塗布された接着剤５２と、筐体１０の短手方向に沿って塗布された接着剤５１とが互いに接続する部分の厚さを、ｔ３とした場合、ｔ３＞ｔ２＞ｔ１の関係が成り立つ。このため、表示装置は、筐体１０における長手方向の反りと短手方向の反りとの双方を、抑えることができる。 In the display device, the thickness of the adhesive 52 applied along the longitudinal direction of the housing 10 is t1, and the thickness of the adhesive 51 applied along the lateral direction of the housing 10 is t1. , t2, and the adhesive 52 applied along the longitudinal direction of the housing 10 and the adhesive 51 applied along the lateral direction of the housing 10 are connected to each other at the corners of the housing 10. Assuming that the thickness of the portion is t3, the relationship t3>t2>t1 holds. Therefore, the display device can suppress both warping in the longitudinal direction and warping in the lateral direction of the housing 10 .
実施の形態５．
　実施の形態５に係る表示装置について、図１０を用いて説明する。 Embodiment 5.
A display device according to Embodiment 5 will be described with reference to FIG.
　図１０は、実施の形態５に係る表示装置の構成を示す図である。なお、実施の形態１で説明した構成と同様の機能を有する構成については、同一の符号を付し、その説明を省略する。 FIG. 10 is a diagram showing the configuration of the display device according to the fifth embodiment. It should be noted that configurations having functions similar to those of the configuration described in Embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted.
　実施の形態５に係る表示装置は、当該表示装置の正面から見て、全体として楕円形をなしている。このため、図１０Ａに示すように、保護部材２３は、正面から見て、楕円形をなしている。これに対して、筐体１０の短辺面１２及び長辺凸面１３（図示省略）は、保護部材２３の外周部２３ａに沿うように湾曲している。短辺面１２には、接着剤５１が塗布されている。長辺凸面１３には、接着剤５２が塗布されている。このため、表示装置は、長手方向（長軸方向）の線膨張差を、短辺面１２に塗布された接着剤５１によって吸収することができる。よって、表示装置は、長手方向の反りを抑えることができる。 The display device according to Embodiment 5 has an oval shape as a whole when viewed from the front of the display device. Therefore, as shown in FIG. 10A, the protective member 23 has an elliptical shape when viewed from the front. On the other hand, the short-side surface 12 and the long-side convex surface 13 (not shown) of the housing 10 are curved along the outer peripheral portion 23 a of the protective member 23 . An adhesive 51 is applied to the short side surfaces 12 . An adhesive 52 is applied to the convex surface 13 on the long side. Therefore, the display device can absorb the linear expansion difference in the longitudinal direction (major axis direction) by the adhesive 51 applied to the short side surfaces 12 . Therefore, the display device can suppress warping in the longitudinal direction.
　また、図１０Ｂに示すように、筐体１０は、直線状をなす短辺面１２（図示省略）を備えても構わない。この短辺面１２は、長手方向と直交する方向に延びている。当該短辺面１２には、接着剤５１が塗布されている。 Further, as shown in FIG. 10B, the housing 10 may have a straight short side surface 12 (not shown). This short side surface 12 extends in a direction orthogonal to the longitudinal direction. An adhesive 51 is applied to the short side surfaces 12 .
　以上、実施の形態５に係る表示装置は、筐体１０と、表示パネル２１の表示面２１ａに設けられ、表示面２１ａと接触しない非接触領域が接着剤５１，５２を介して筐体１０に固定される保護部材２３とを備える。筐体１０の短手方向に沿って塗布された接着剤５１の厚さは、筐体１０の長手方向に沿って塗布された接着剤５２の厚さよりも厚い。このため、表示装置は、筐体１０とこれに接着固定される保護部材２３との間の線膨張差によって生じる反りを、抑えることができる。 As described above, the display device according to the fifth embodiment is provided on the housing 10 and the display surface 21 a of the display panel 21 , and the non-contact regions that do not contact the display surface 21 a are attached to the housing 10 via the adhesives 51 and 52 . and a fixed protective member 23 . The thickness of adhesive 51 applied along the lateral direction of housing 10 is greater than the thickness of adhesive 52 applied along the longitudinal direction of housing 10 . Therefore, the display device can suppress warping caused by a difference in linear expansion between the housing 10 and the protective member 23 adhered thereto.
　なお、本開示はその開示の範囲内において、各実施の形態の自由な組み合わせ、あるいは各実施の形態の任意の構成要素の変形、もしくは各実施の形態において任意の構成要素の省略が可能である。 In addition, within the scope of the disclosure, the present disclosure can freely combine each embodiment, modify any component of each embodiment, or omit any component in each embodiment. .
　本開示に係る表示装置は、筐体の短手方向に沿って塗布された接着剤の厚さを、筐体の長手方向に沿って塗布された接着剤の厚さよりも厚くすることで、筐体と保護部材との間の線膨張差による反りを抑えることができ、表示装置等に用いるのに適している。 In the display device according to the present disclosure, the thickness of the adhesive applied along the lateral direction of the housing is thicker than the thickness of the adhesive applied along the longitudinal direction of the housing. Warping due to the difference in linear expansion between the body and the protective member can be suppressed, making it suitable for use in display devices and the like.
　１０　筐体、１１　平坦面、１２　短辺面、１３，１３Ａ　長辺凸面、１４　長辺凹面、１５　凹面、２０　液晶モジュール、２１　表示パネル、２１ａ　表示面、２２，２３　保護部材、２２ａ，２３ａ　外周部、５０，５１，５２，５３　接着剤。 10 housing, 11 flat surface, 12 short side surface, 13, 13A long side convex surface, 14 long side concave surface, 15 concave surface, 20 liquid crystal module, 21 display panel, 21a display surface, 22, 23 protective member, 22a, 23a periphery Part, 50, 51, 52, 53 Adhesive.

Claims (4)

  1. 　筐体と、
    　表示パネルの表示面に設けられ、前記表示面と接触しない非接触領域が接着剤を介して前記筐体に固定される保護部材とを備え、
    　前記筐体の短手方向に沿って塗布された接着剤の厚さは、前記筐体の長手方向に沿って塗布された接着剤の厚さよりも厚い
    　ことを特徴とする表示装置。     a housing;
    a protective member provided on the display surface of the display panel and fixed to the housing via an adhesive in a non-contact area that does not contact the display surface;
    A display device, wherein the thickness of the adhesive applied along the lateral direction of the housing is thicker than the thickness of the adhesive applied along the longitudinal direction of the housing.
  2. 　前記筐体の長手方向に沿って塗布された接着剤の厚さは、前記筐体の長手方向中央部から長手方向外側に向かうに従って、連続的又は段階的に厚くなる
    　ことを特徴とする請求項１記載の表示装置。     3. The thickness of the adhesive applied along the longitudinal direction of the housing increases continuously or stepwise from the central portion in the longitudinal direction of the housing toward the outer side in the longitudinal direction. 1. The display device according to 1.
  3. 　前記筐体の短手方向に沿って塗布された接着剤の厚さは、前記筐体の短手方向中央部から短手方向外側に向かうに従って、連続的又は段階的に厚くなる
    　ことを特徴とする請求項１記載の表示装置。     The thickness of the adhesive applied along the widthwise direction of the casing increases continuously or stepwise from the widthwise center of the casing toward the widthwise outer side. The display device according to claim 1.
  4. 　前記筐体の長手方向に沿って塗布された接着剤の厚さを、ｔ１とし、
    　前記筐体の短手方向に沿って塗布された接着剤の厚さを、ｔ２とし、
    　前記筐体の隅部において、前記筐体の長手方向に沿って塗布された接着剤と、前記筐体の短手方向に沿って塗布された接着剤とが互いに接続する部分の厚さを、ｔ３とした場合、
    　ｔ３＞ｔ２＞ｔ１の関係が成り立つ
    　ことを特徴とする請求項１記載の表示装置。     Let t1 be the thickness of the adhesive applied along the longitudinal direction of the housing,
    Let t2 be the thickness of the adhesive applied along the lateral direction of the housing,
    In the corner of the housing, the thickness of the portion where the adhesive applied along the longitudinal direction of the housing and the adhesive applied along the lateral direction of the housing are connected to each other, If t3,
    2. The display device according to claim 1, wherein a relationship of t3>t2>t1 holds.
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