JP7106836B2 - Display device - Google Patents

Description

The present invention relates to a display device that displays a screen using a liquid crystal display.

Conventionally, the display quality of display devices tends to deteriorate due to mechanical distortion of the display surface, light leakage, entry of dust, etc. Various methods have been proposed to prevent this quality deterioration. (See Patent Documents 1 and 2, for example).

According to the technique described in Patent Document 1, the opening of the housing is formed to be larger than the outer dimensions of the second transparent substrate on the side of the opening of the liquid crystal panel, and the distance between the housing and the second transparent substrate is approximately the same. A conductive and light shielding sheet is attached to the front. As a result, the flexibility of the sheet reduces the mechanical distortion that occurs in the liquid crystal panel, while preventing light leakage and dust intrusion.

In addition, according to the technique described in Patent Document 2, in order to suppress display unevenness caused by mechanical distortion, the four corners are not pressed, and the liquid crystal panel is sandwiched by the frame at other portions avoiding the four corners. Reducing the stress in the part reduces the mechanical strain.

Japanese Patent Application Laid-Open No. 2006-201359 JP 2013-164466 A

By the way, it is desirable to employ a method of fixing the display surface of the liquid crystal display using an optical adhesive. This is because the optical adhesive is colorless and transparent when cured, and can suppress display unevenness by being used in close contact with the display surface of the liquid crystal display.

However, according to the inventors, it has been confirmed that if members having large differences in thermal expansion coefficients are simply fixed with screws when fixed using an optical adhesive, the front plate will warp due to thermal contraction. It is Neither of the techniques disclosed in Patent Literatures 1 and 2 assumes fixing using an optical adhesive, and even if the technique is applied, it is assumed that display unevenness will occur.

An object of the present invention is to secure the torsional rigidity of the entire device and mitigate deformation due to thermal contraction when fixing parts having different linear expansion coefficient differences in a structure in which the display surface of a liquid crystal display is fixed with an optical adhesive. It is an object of the present invention to provide a display device capable of suppressing display unevenness.

According to the first aspect of the invention, since the first part and the second part are fixed by the adhesive portion and the fastening part, the torsional rigidity of the entire device can be ensured. Moreover, since the first part is provided with a clearance around the fastening part in the in-plane direction that allows the fastening part to move within a predetermined range in the in-plane direction intersecting the adhesive direction of the adhesive tape , temperature changes occur. Even so, the deformation due to thermal expansion or thermal contraction can be mitigated by the clearance. As a result, display unevenness on the display surface of the liquid crystal display can be suppressed. The first and second parts are formed in a rectangular shape in the in-plane direction, and are adhered with an adhesive tape in a region including the four corners of the rectangular shape.

Cross-sectional view around the fastening part in the first embodiment 4 is a perspective view showing the first embodiment including a cut plane taken along line AA of FIG. 3; FIG. Appearance perspective view of the fastening portion according to the first embodiment FIG. 2 is a cut end view showing the display device according to the first embodiment cut in the front, rear, left, and right directions; 1 is an external perspective view showing the overall structure of a display device according to a first embodiment; FIG. FIG. 2 is a plan view of the display device according to the first embodiment as seen from the rear side; FIG. 1 is a view schematically showing a deformation state of each part according to a peripheral heat change in the display device of the first embodiment; 2 of a diagram schematically showing a deformation state of each part according to a peripheral heat change in the display device of the first embodiment; FIG. 3 of the diagram schematically showing the deformation state of each part according to the peripheral heat change in the display device of the first embodiment; FIG. 4 is a diagram schematically showing a deformation state of each part according to a peripheral heat change in the display device of the first embodiment; An end view of a cut portion showing a display device of a comparative example cut in the front, rear, left, and right directions. 3. Perspective view showing the second embodiment including a cut plane taken along line AA of FIG. Cross-sectional view around the fastening part in the second embodiment

Several embodiments of the display device will be described below with reference to the drawings. In the second and subsequent embodiments, portions having the same or similar functions as those of the first embodiment are denoted by the same or similar reference numerals, and description thereof is omitted as necessary, and the description will focus on the different portions.

(First embodiment)
1 to 11 are explanatory diagrams of the first embodiment. Although this embodiment will be described using the XYZ coordinate system shown in FIGS. 1 and 4, this XYZ indicates a coordinate system orthogonal to each other. Here, the Z direction is defined as the front-back direction, the Y direction is defined as the left-right direction, and the X direction perpendicular to the plane of FIG. 1 or FIG. 4 is defined as the up-down direction.

FIG. 4 schematically shows a longitudinal cross-sectional structural view of the display device 1 cut in the front, rear, left, and right directions, FIG. 5 is an external perspective view of the overall structure of the display device 1 viewed from the front side, and FIG. Fig. 4 schematically shows a top view seen;

The display device 1 shown in FIG. 5 is a display device integrated with a touch panel. For example, it is installed on the dashboard near the driver's seat of the vehicle, which is visible to the driver.

As shown in FIG. 4, the display device 1 generally includes a metal rear frame 2, a backlight 3, a spacer 4, a liquid crystal display 5, a touch panel 6, and The front plate 7 is assembled in this order to form a vehicle-mounted display unit. The front plate 7 corresponds to the first part. Although not shown, the display device 1 also includes a printed wiring board mounted with a display control circuit for controlling the display of the liquid crystal display 5 around the rear frame 2 . As shown in FIG. 4, since the display device 1 has a generally bilaterally symmetrical structure, hereinafter, the same reference numerals are given to a pair of structural parts, and the suffixes a and b are given to the parts having the same left and right functions. Give an explanation.

The front plate 7 is made of so-called resin, and as shown in FIG. A pair of extending portions 9a and 9b extending in the direction are integrally formed. The extended portions 9a and 9b of the front plate 7 correspond to the first component.

The rectangular frame 8 has a colored design, but the inside of the rectangular frame 8 is integrally formed using a transparent plate 8a, and the front surfaces of the rectangular frame 8 and the transparent plate 8a are flush with each other. An external user (for example, a driver) can visually recognize the inside of the rectangular frame 8 through the transparent plate 8a. The extending portion 9a includes an extending portion 10a and a projecting portion 11a, and the extending portion 9b includes an extending portion 10b and a projecting portion 11b.

The extending portions 10a and 10b are integrally formed at both the left and right ends of the rectangular frame 8 of the front plate, and are provided so as to extend rearward. The protruding portions 11a and 11b are integrally formed so as to protrude left and right outward from the rear extending ends of the extending portions 10a and 10b, respectively.

FIG. 3 shows an external perspective view of a fastening portion with screws, FIG. 1 shows a cross-sectional view of the vicinity of the fastening portion of the display device 1 in the direction of line AA in FIG. 3, and FIG. It is a perspective view shown including a cut surface of a line.

The extending portion 10a and the protruding portion 11a are connected by a bent portion 12a, whereby the extending portion 9a is configured to have an L-shaped cross section. As shown in FIG. 5, the relationship between the extending portion 10b at the left end and the projecting portion 11b is the same, and the extending portion 10a and the projecting portion 11b are provided substantially bilaterally symmetrical.

Further, as shown in FIG. 5, extending portions 9c and 9d are integrally formed at the upper and lower ends of the rectangular frame 8 so as to extend backward in a curved manner. The front plate 7 is formed integrally with the rectangular frame 8, the left and right extensions 9a and 9b, and the upper and lower extensions 9c and 9d. has no steps or seams. Thereby, the degree of freedom in design can be increased.
The inside of the rectangular frame 8 of the front plate 7 serves as the display surface area of the liquid crystal display 5 and is provided as the operation area of the touch panel 6 .

Although the cross section is shown in FIG. 4, the touch panel 6 has a rectangular shape on the XY plane and is attached to the inner and rear sides of the transparent plate 8a of the front panel 7 with the user operation surface facing the front side. The liquid crystal display 5 also has a rectangular shape on the XY plane and is arranged inside and behind the transparent plate 8a of the front plate 7, and glass is provided on the front surface thereof. The front plate 7 and the liquid crystal display 5 are adhered with an optical adhesive 13 via the touch panel 6 . Since the optical adhesive 13 becomes colorless and transparent when cured, the display surface of the liquid crystal display 5 can be visually recognized by an external user through the optical adhesive 13 .

A backlight 3 is arranged on the rear side of the liquid crystal display 5 via a spacer 4 , and a metal rear frame 2 is arranged on the rear side of the backlight 3 . The rear frame 2 is formed in the shape of a flat plate, and is molded so that the central portion of the plane protrudes rearward.

Intermediate frames 14 a and 14 b are arranged on the front side of the rear frame 2 for fixing the backlight 3 . These intermediate frames 14a and 14b are fastened and fixed to the rear frame 2 by means of pan head screws 17a and 17b, respectively. The backlight 3 is gripped and fixed. A liquid crystal display 5 is installed via a spacer 4 on the front side of the intermediate frames 14a and 14b. The backlight 3 irradiates the liquid crystal display 5 with light from the back side of the liquid crystal display 5 and transmits the light through the transparent portion in the rectangular frame 8 of the front plate 7 to the display surface of the liquid crystal display 5, so that the external user can see the liquid crystal. The image displayed on the display surface of the display 5 can be visually recognized.

Metal reinforcing frames 16a and 16b are installed as second parts on the front side of the intermediate frames 14a and 14b. The reinforcing frames 16a and 16b are arranged along the inner side of the front plate 7 for reinforcing the rigidity of the front plate 7 made of resin. More specifically, the reinforcing frames 16a and 16b are installed in an L-shaped cross section along the projecting portions 11a, the bent portions 12a, and the extending portions 10a of the extended portions 9a and 9b of the front plate 7. there is

As shown in FIG. 4, the pair of projecting portions 11a and 11b of the front plate 7 are provided with through holes 20a and 20b, respectively, and the reinforcing frames 16a and 16b are provided with female screw holes (no reference numerals). The front plate 7 and the reinforcing frames 16a and 16b are fastened at both left and right ends thereof using stepped screws 19a and 19b as fastening parts. The stepped screws 19a and 19b are inserted through the through holes 20a and 20b and fastened to the female screw holes of the reinforcing frames 16a and 16b. Therefore, the reinforcing frames 16a and 16b are used as members to be fastened by the shoulder screws 19a and 19b. The reinforcing frame 16a is provided along the extended portion 9a of the front plate 7 and the reinforcing frame 16b is provided along the extended portion 9b of the front plate 7, so that the torsional rigidity of the front plate 7 can be enhanced.

The reinforcing frames 16a and 16b are provided with threaded holes (not labeled) at positions different from the aforementioned female threaded holes, and as shown in FIG. While fastening the intermediate frames 14a and 14b, the reinforcing frames 16a and 16b are also connected and fastened.

<Description of Configuration of Stepped Screw 19a and Peripheral Structure>
1 to 3, the structure of the stepped screw 19a on the left side of the display device 1 and its peripheral structure will be described in detail below. As shown in FIG. 4, the display device 1 has a bilaterally symmetrical structure, so detailed description of the configuration of the stepped screw 19b on the right side and its peripheral structure will be omitted.

As shown in FIGS. 1 and 2, the stepped screw 19a integrally includes a seated screw head 21, a stepped portion 22, and a threaded portion . The seated screw head 21 is, for example, pan-shaped and has a seat 24 , and the seat 24 of the screw head 21 is integrally formed with a stepped portion 22 . The stepped portion 22 is provided in a cylindrical shape and is a portion where no screw is formed. A threaded portion 23 is formed integrally with the stepped portion 22 . The stepped screw 19 a is configured such that the diameter of the seat 24 of the screw head 21 is larger than the diameter of the stepped portion 22 , and the diameter of the stepped portion 22 is larger than the diameter of the threaded portion 23 . Therefore, when the stepped screw 19a is tightened into the female threaded hole of the reinforcing frame 16a, the peripheral edge of the seat 24 of the screw head 21 presses the projecting portion 11a of the front plate 7, and the peripheral edge of the stepped portion 22 is pressed. presses the outer periphery of the female threaded hole of the reinforcing frame 16a, so that the front plate 7 and the reinforcing frame 16a can be firmly tightened in the longitudinal direction. As a result, the stepped screw 19a can fasten the front plate 7 and the reinforcing frame 16a in the longitudinal direction.

When the stepped screw 19a is fastened to the female threaded hole, clearances 25 and 26 are provided between the stepped portion 22 of the stepped screw 19a and the through hole 20a provided in the projecting portion 11a of the front plate 7 in the XY plane direction. Prepare for. The XY plane direction corresponds to an in-plane direction perpendicular to the Z direction. For convenience of explanation, as shown in FIGS. 1 and 2, a gap provided between the stepped portion 22 and the projecting portion 11a inside the stepped portion 22 is defined as a clearance 25, and the stepped portion 22 and the stepped portion A clearance 26 is defined as a gap provided between the outer projecting portion 11a of 22 and the projecting portion 11a.

As a result, the projecting portion 11a of the front plate 7 can slide in the XY plane direction, that is, in the vertical and horizontal directions while being sandwiched between the seat 24 and the reinforcing frame 16a. These clearances 25 and 26, which will be described in detail later in the description of operation, are provided to eliminate the difference in thermal expansion and contraction caused by the material difference between the front plate 7 and the reinforcing frame 16a.

<Applying Areas of Adhesive Tapes 18a to 18d>
Adhesive tapes 18a to 18d are provided as adhesive portions to assist the bonding between the resin front plate 7 and the metal reinforcing frames 16a and 16b. Each of the adhesive tapes 18a to 18d has a thickness of several millimeters in the Z direction. These adhesive tapes 18a to 18d are made of well-known materials that have heat resistance at low and high temperatures and moderate creep resistance.

5 and 6 show specific examples of the application areas of the adhesive tapes 18a to 18d within the XY plane. The front plate 7 has a substantially rectangular shape based on the rectangular frame 8 on the XY plane. is arranged to

Adhesive tapes 18a to 18d are provided so as to adhere all of the reinforcing frames 16a and 16b and the extended portions 9a and 9b of the front plate 7, the adhesive tape 18c is applied and adhered to the front region, and the adhesive tape 18d is applied. is fixed by sticking and gluing the rear area. In particular, the adhesive tape 18c has two corners on the front side that are curved rearward in a plan view and adheres to the two corners corresponding to the rectangular front portion of the rectangular frame 8 . Similarly, the adhesive tape 18d has both rear corners curved forward in a plane and adheres two corners corresponding to the rectangular rear portion of the rectangular frame 8 . As a result, the adhesive tapes 18c and 18d are attached in the area including the four corners of the rectangle.

1 and 4 show cross-sections including areas where the adhesive tapes 18a and 18b are applied. As shown in FIGS. 1 and 4, the adhesive regions of the adhesive tapes 18a and 18b are the fastening portions of the stepped screws 19a and 19b between the projecting portions 11a and 11b of the front plate 7 and the reinforcing frames 16a and 16b. located around. Further, as shown in FIG. 1, the adhesive tape 18a adheres the reinforcing frame 16a and the projecting portion 11a in the peripheral region of the through hole 20a.

The action of the above configuration will be described.
7 to 10 schematically show the deformation state of each part according to the thermal change around the display device 1. FIG. Since the display device 1 is mounted on a vehicle, the ambient temperature changes according to the vehicle state. When the environmental temperature changes, each component forming the display device 1 expands or contracts. At this time, since the front plate 7 made of resin and the reinforcing frames 16a and 16b made of metal have different linear expansion coefficients, the degrees of expansion/contraction are different from each other. In particular, the coefficient of linear expansion of the front plate 7 made of resin is larger than that of the reinforcement frames 16a and 16b made of metal.

The stepped screw 19a is fastened in the front-rear direction, and when the ambient temperature of the display device 1 is normal temperature (for example, 25° C.), the clearances 25 and 26 are aligned with the steps of the stepped screw 19a, as shown in FIG. It is provided around the stepped portion 22 in the XY plane direction between 22 and the projecting portion 11 a of the front plate 7 .

For example, when the ambient temperature changes from room temperature to high temperature (e.g., 80° C.), as shown in FIGS. 7 and 8, the front plate 7 and reinforcing frames 16a and 16b both expand and extend particularly in the horizontal direction, that is, the Y direction. . At this time, as shown in FIG. 8, since the coefficient of linear expansion of the projecting portion 11a of the front plate 7 is larger than that of the reinforcing frame 16a, the projecting portion 11a moves outward relative to the reinforcing frame 16a. do.

Since the adhesive tapes 18a to 18d exert an adhesive force between the reinforcing frame 16a and the front plate 7, as shown in FIG. By doing so, the adhesive tapes 18a to 18d are deformed so as to extend outward in the XY directions.

Even if the front plate 7 is deformed due to thermal expansion, it deforms so as to bury the inner clearance 25 provided between the stepped portion 22 of the stepped screw 19a and the projecting portion 11a of the front plate 7. As a result, the projecting portion 11a of the front plate 7 does not come into contact with the stepped portion 22 of the stepped screw 19a, and excessive stress is not applied to the projecting portion 11a of the front plate 7. FIG. Thereafter, when the ambient temperature changes from a high temperature to a normal temperature, both the resin front plate 7 and the reinforcing frame 16a shrink, and the clearance 25 increases according to the adhesive strength of the adhesive tapes 18a-18d. Therefore, as shown in FIG. 1, the fastened state at room temperature is restored.

Conversely, when the ambient temperature changes from room temperature to low temperature (for example, below freezing point), as shown in FIGS. Shrink. At this time, since the coefficient of linear expansion of the projecting portion 11a of the front plate 7 is larger than that of the reinforcing frame 16a, the projecting portion 11a moves inward relative to the reinforcing frame 16a as shown in FIG. do.

The adhesive tapes 18a to 18d exert an adhesive force between the reinforcing frames 16a and 16b and the front panel 7, but as shown in FIG. By moving inward, the adhesive tapes 18a to 18d are deformed so as to shrink inward in the XY direction.
Therefore, even if the front plate 7 is deformed due to heat shrinkage, the outer clearance 26 provided between the stepped portion 22 of the stepped screw 19a and the projecting portion 11a of the front plate 7 is buried. , the projecting portion 11a of the front plate 7 does not come into contact with the stepped portion 22 of the stepped screw 19a, and excessive stress is not applied to the front plate 7. Thereafter, even if the ambient temperature changes from low to room temperature, the front plate 7 expands and the clearances 25 and 26 at room temperature are restored as shown in FIG. 1 according to the adhesive strength of the adhesive tapes 18a to 18d. .

<Comparative example>
FIG. 11 schematically shows a cross-sectional view of a comparative example considered by the inventors. As shown in FIG. 11, the inventor considered fastening the front plate 7 and the reinforcing frames 16a and 16b using general pan head screws Na and Nb. The front plate 7a of FIG. 11 is configured without the clearances 25 and 26 described above in the small diameter through holes 20a and 20b, so that the pan head screws Na and Nb are inserted into the through holes 20a and 20b without play. It is

When the structure of FIG. 11 is used, when the environmental temperature changes from room temperature to high temperature, the front plate 7 expands and the force escape region disappears, and the rectangular frame 8 of the front plate 7, especially the rectangular frame 8 and the transparent portion inside thereof are removed. It was understood that the plate 8a protrudes forward in the Z direction and bends. Therefore, it has been confirmed that when the front plate 7 is adhered with the optical adhesive 13, the front glass of the liquid crystal display 5 is also deformed, resulting in display unevenness.

<Summary of configuration and effects according to the present embodiment>
According to this embodiment, when the resin front plate 7 is adhered to the display surface of the liquid crystal display 5 with the optical adhesive 13, the metal reinforcing frames 16a and 16b and the resin front plate 7 are They are fixed by being adhered by adhesive tapes 18a to 18d and fastened by stepped screws 19a and 19b. Therefore, the torsional rigidity of the entire display device 1 can be enhanced.

Clearances 25 and 26 are provided in a predetermined range around the shoulder screws 19a and 19b in an in-plane direction perpendicular to the adhesive direction of the adhesive tapes 18a to 18d. Therefore, even if the ambient temperature changes, the projecting portion 11a of the front plate 7 can move within a predetermined range with respect to the stepped screw 19a. The plate 8a is no longer bent forward. As a result, the front glass of the liquid crystal display 5 adhered to the front plate 7 is not deformed, and display unevenness can be suppressed.

When the stepped screws 19a and 19b fasten the front plate 7 and the reinforcing frames 16a and 16b, the head of the screw with the seat 21 presses the front plate 7 and the stepped portion 22 presses the reinforcing frames 16a and 16b, so that they are firmly fixed. can. The number of parts can be reduced as compared with a configuration in which a collar 27 is provided as in a second embodiment described later.

The front plate 7 and the reinforcing frames 16a and 16b are configured in a rectangular shape in the XY directions, and are adhered by the adhesive tapes 18c and 18d in the area including the four corners of the rectangular shape, so that the torsional rigidity can be further increased. .

(Second embodiment)
12 and 13 show additional explanatory diagrams of the second embodiment. In the first embodiment, the stepped screw 19a having the stepped portion 22 is used to fasten the front plate 7 and the reinforcing frame 16a, but the present invention is not limited to this.

As shown in FIGS. 12 and 13, a washer screw 119a may be used as a fastening part instead of the shoulder screw 19a. The washer screw 119 a includes a washer screw head 21 , a seat 24 , and a threaded portion 23 . The seated screw head 21 is, for example, pan-shaped and has a seat 24 , and the seat 24 of the screw head 21 is integrally formed with a threaded portion 23 . The diameter of the seat 24 of the screw head 21 is larger than the diameter of the threaded portion 23, and the diameter of the threaded portion 23 is generally constant.

When such a washer screw 119a is used, it is preferable to provide a collar 27 for transmitting the pressing force of the seat 24 of the washer screw head 21 to the reinforcing frame 16a. The collar 27 is configured as a separate part from the washer screw 119a, and is made of, for example, resin or metal and configured in a hollow cylindrical shape. If it is made of metal, it is more desirable because the pressing force increases.

The hollow cylindrical collar 27 also includes a hollow cylindrical cylindrical portion 28 and a flange portion 29 . The flange portion 29 is provided so as to contact the lower surface of the seat 24 of the screw head 21 . The flange portion 29 abuts against the seat 24 of the screw head 21 , so that the pressing force of the seat 24 of the screw head 21 can be transmitted to the projecting portion 11 a of the front plate 7 . The force transmitted to the front panel 7 is also transmitted to the reinforcing frame 16a.

Further, the lower end of the cylindrical portion 28 abuts on the reinforcing frame 16a, so that the pressing force of the cylindrical portion 28 of the collar 27 can be directly transmitted to the reinforcing frame 16a. Thereby, it can fix firmly.

The through hole 20a provided in the protruding portion 11a is configured to be larger than the outer diameter of the cylindrical portion 28, thereby providing a clearance 25 between the inner side of the protruding portion 11a and the outer side of the cylindrical portion 28 of the collar 27. and 26 can be provided. The inner diameter of the cylindrical portion 28 is made larger than the diameter of the threaded portion 23 of the washer screw 119a. This allows further clearances 30 and 31 between the inside of the cylindrical portion 28 of the collar 27 and the outside of the threaded portion 23 . The actions of the clearances 25 and 26 and 30 and 31 in this configuration are the same as in the above-described embodiment, and description thereof is omitted. As a result, the same effects as those of the above-described embodiment can be obtained.

According to this embodiment, the washer screws 119a press the front plate 7 and the reinforcing frame 16a via the collar 27, so that they can be firmly fixed. In addition, since the clearances 25 and 26 and 30 and 31 are provided inside and outside the collar 27, it is possible to further secure play and margin in the XY in-plane direction.

(Other embodiments)
The present invention is not limited to the technology according to the above-described embodiments, and can be modified or expanded, for example, as follows.
Although the XYZ directions are orthogonal to each other at 90°, they may be crossing directions. Therefore, when the adhesive direction of the adhesive tapes 18a to 18d is the Z direction, the fastening direction may be different from the fastening direction as long as the stepped screw 19a or screw 119a is fastened in a direction including this adhesive direction. .
Although the form applied to the display device 1 integrated with the touch panel is shown, it can also be applied to a remote display installed at a position where the driver's fingers cannot reach even in the vehicle, various meter devices for the vehicle, a navigation device, a smartphone, etc. can. The touch panel 6 may be omitted.

The areas where the adhesive tapes 18a to 18d are attached may be changed according to the design of the front plate 7 and the reinforcing frames 16a and 16b, and the areas do not necessarily have to be attached to the four corners in the in-plane direction.

Although the front plate 7 is made of resin and the reinforcing frames 16a and 16b, which are members to be fastened, are made of metal, the material is not limited to this. Materials different from each other, particularly materials having different coefficients of linear expansion, can be applied.
For example, when the metal reinforcement frames 16a and 16b are used as members to be fixed to the front plate 7, the front plate 7 may be made of glass having a small difference in thermal expansion coefficient from the reinforcement frames 16a and 16b. However, when glass is used as the front plate 7, bending and cutting are post-processing compared to resin, so the processing itself is more difficult and costly, and the degree of freedom in shape is small. Therefore, as shown in the first embodiment, by forming the front plate 7 from resin, the cost can be reduced and the degree of freedom in design can be increased.

The symbols in parentheses described in the claims indicate the corresponding relationship with the specific means described in the embodiment described above as one aspect of the present invention, and limit the technical scope of the present invention. not a thing A mode in which part of the above embodiment is omitted as long as the problem can be solved can also be regarded as an embodiment. In addition, all conceivable aspects can be regarded as embodiments as long as they do not deviate from the essence of the invention specified by the language in the claims.

Moreover, although the present invention has been described in accordance with the above-described embodiments, it is understood that the present invention is not limited to such embodiments or structures. The present invention includes various modifications and modifications within the equivalent range. In addition, various combinations and configurations, as well as other combinations and configurations including one, more, or less elements thereof, are within the scope and spirit of this disclosure.

In the drawings, 1 is a display device, 5 is a liquid crystal display, 7 is a front plate (first component), 9a and 9b are extended portions (first component), 13 is an optical adhesive, and 16a and 16b are reinforcing frames ( Second part), 18a to 18d are adhesive tapes (adhesive parts), 19a and 19b are stepped screws (fastening parts), 119a is seated screws (fastening parts), 21 is a seated screw head, 22 is a stepped part, and 23 is Threaded portions 25, 26, 30 and 31 indicate clearances.

Claims (4)

a first part (7, 9a, 9b) provided in such a manner that the display surface of the liquid crystal display (5) can be viewed from the outside by being in close contact with the display surface of the liquid crystal display (5) via at least an optical adhesive (13);
Between the first part and the first part, theAdhesive tapesecond parts (16a, 16b) adhered by (18a-18d);
said adhesive tape a fastening part (19a, 19b; 119a) for fastening the first part and the second part in a direction including the adhesion direction by
The first part includessaid adhesive tapeA clearance (25, 26; 30, 31) that allows the fastening part to move within a predetermined range in the in-plane direction that intersects the adhesion direction of the fastening part is provided around the in-plane direction of the fastening part,
The first and second parts are formed in a rectangular shape in the in-plane direction and are adhered by the adhesive tape in a region including four corners of the rectangular shape. display device. The fastening parts (19a, 19b) are composed of stepped screws (19a, 19b) integrally provided with a seat screw head (21), a stepped portion (22), and a threaded portion (23). The two parts are provided with threaded holes to which the threaded portions are fastened,
When the fastening part fastens the first part and the second part, the stepped screw presses the first part with the screw head with the seat and presses the second part with the stepped portion. 1. The display device according to 1. The fastening part (119a) includes a washer screw (119a) integrally including a washer screw head (21) and a threaded portion (23), and a washer screw (119a) provided so as to surround the circumference of the washer screw in the in-plane direction. and a collar (27), and the second part is provided with a screw hole to which the screw part is fastened,
2. The display device according to claim 1, wherein when the fastening part fastens the first part and the second part, the washer screw presses the first part and the second part through the collar. 4. The display device according to claim 3, wherein the clearance is provided outside of the collar in the in-plane direction, and is provided between the threaded portion of the washer screw and the collar.

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