JP2016126300A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such a structure that application of great stress to a display panel can be prevented even in the case of the display panel being warped, in a display device which has a buffer member having a rectangular cross section between the display panel and a front side enclosure.SOLUTION: A display device comprises a display panel, a front side enclosure covering the periphery of a display region of the display panel from the front side, and a buffer member provided along four sides between the display panel and the front side enclosure and is characterized in that the buffer member has a rectangular cross section in a direction perpendicular to a lengthwise direction and is attached to a part facing the display panel, of the front side enclosure and an attachment surface to which the buffer member is attached, of the front side enclosure is at least partially a slope inclined relative to a plane parallel with the display panel, in each side.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a display device.

  Among display devices that are becoming thinner, display devices using a panel module including an LCD (Liquid Crystal Display) panel and a backlight have become mainstream. FIG. 7 is an external view of a conventional display device 1 and is a front perspective view. FIG. 8 is a schematic sectional view of the display device 1. The liquid crystal panel 2 is sandwiched between a bezel 26 and a backlight case 4 as a frame-like front side housing. A buffer member 5 made of an elastic material such as urethane foam or synthetic rubber is affixed to the inside of the bezel 26, and the liquid crystal panel 2 is made of a glass substrate so that the liquid crystal panel 2 made of a glass substrate does not get damaged when it contacts the bezel 26. Hold. In addition, the liquid crystal panel 2 can be held without applying a large stress to the liquid crystal panel 2 by being held via the buffer member 5, and intrusion of dust and the like is prevented, and vibration resistance and impact resistance are improved. Can be achieved.

  By the way, the liquid crystal panel 2 made of glass and the bezel 26 made of resin or metal have different shrinkage and expansion rates because of different materials. For this reason, in patent document 1, the buffer member 5 which changed the elasticity modulus of the thickness direction and changed more easily is proposed. Thereby, even if environmental temperature change is large, the stress added to the liquid crystal panel 2 is relieved, and the deterioration of display quality can be suppressed. On the other hand, the medium-sized and large-sized liquid crystal panel 2 may have a flatness due to slight warpage, and a gap may be partially formed between the liquid crystal panel 2 and the buffer member 5. If the buffer member 5 is configured so as to reduce such a gap, the buffer member 5 may partially press the liquid crystal panel 2 and apply a load to the liquid crystal panel 2 in some cases. On the other hand, Patent Document 2 proposes a buffer member 5 having a shape whose tip is easily deformed.

  In Patent Document 1 and Patent Document 2, a buffer member having a tip portion that is easily deformed by making the cross-sectional shape perpendicular to the longitudinal direction a non-rectangular shape is used. On the other hand, FIG. 9 shows the buffer member 5 having a general shape used in the display device 1, FIG. 9A is a perspective view, and FIG. 9B is a side view seen from the end face side. The buffer member 5 is made by punching a sheet material 6 made of an elastic body such as foamed urethane or synthetic rubber by a bi-shaped shape, and has a rectangular cross-sectional shape perpendicular to the longitudinal direction. An adhesive material 7 is attached to one side of the sheet material 6, and a mount 8 is applied to the adhesive material 7. The adhesive material 7 is punched out together with the sheet material 6 by a big die, and the buffer member 5 can be easily peeled from the mount 8 together with the adhesive material 7.

JP 2009-92716 A JP-A-2005-275103

FIG. 10 is an exploded perspective view showing the liquid crystal panel 2, the bezel 26 and the buffer member 5 of the conventional display device 1. 11 is a cross-sectional view perpendicular to the longitudinal direction of the buffer member 5 of the display device 1 in which the liquid crystal panel 2, the bezel 26, and the buffer member 5 shown in FIG. 10 are incorporated. 11A is a cross-sectional view of the central portion in the longitudinal direction (cross section aa in FIG. 10), and 11B is a cross-sectional view of the end portion in the longitudinal direction (cross section bb in FIG. 10). The liquid crystal panel 2 in which a thin glass and a resin film polarizing plate are bonded has four corners that warp on the display surface side (downward direction in the figure). Excessive stress is applied to the liquid crystal panel 2. The buffer member 5 appropriately bends and holds the liquid crystal panel 2 as shown by the alternate long and short dash line at the center in the longitudinal direction. Then, a load is applied to the liquid crystal panel 2. For this reason, the buffer members 5 cannot be provided at the four corners of the liquid crystal panel 2, and not only a gap is formed in appearance, but also foreign matter contamination, water droplet intrusion, and dust intrusion may occur.

  Accordingly, an object of the present invention is to provide a display device having a cushioning member having a rectangular cross section between the display panel and the front-side casing, and a structure capable of suppressing a large stress from being applied to the display panel even when the display panel warps. Is to provide.

The present invention includes a display panel,
A front-side housing that covers the periphery of the display area of the display panel from the front side;
A buffer member provided along four sides between the display panel and the front housing;
Have
The buffer member has a rectangular cross section perpendicular to the longitudinal direction, and is attached to a portion of the front side housing facing the display panel,
In the display device, the attachment surface to which the cushioning member of the front-side housing is attached is an inclined surface at least partially inclined with respect to a surface parallel to the display panel on each side.

  According to the present invention, in a display device having a cushioning member having a rectangular cross section between the display panel and the front-side housing, a structure capable of suppressing a large stress from being applied to the display panel even when the display panel warps is provided. can do.

1 is an exploded perspective view showing a liquid crystal panel, a bezel, and a buffer member of a display device according to Embodiment 1. FIG. Sectional drawing of the state in which the liquid crystal panel, the bezel, and the buffer member shown in FIG. The disassembled perspective view which shows the liquid crystal panel of the display apparatus of Example 2, a bezel, and a buffer member. Sectional drawing of the state in which the liquid crystal panel, the bezel, and the buffer member shown in FIG. The figure which shows the liquid crystal panel of the display apparatus of Example 3, a bezel, and a buffer member. The figure which shows the liquid crystal panel of the display apparatus of Example 4, a backlight case, and a buffer member. Front perspective view showing appearance of display device Schematic sectional view of a conventional display device External view showing a general cushioning member An exploded perspective view showing a liquid crystal panel, a bezel and a buffer member of a conventional display device Sectional drawing of the state in which the liquid crystal panel, the bezel, and the buffer member shown in FIG.

Example 1
Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is an exploded perspective view illustrating a liquid crystal panel 2, a bezel 3, and a buffer member 5 of the display device 1 according to the first embodiment. 2 is a cross-sectional view perpendicular to the longitudinal direction of the buffer member 5 of the display device 1 in which the liquid crystal panel 2, the bezel 3 and the buffer member 5 shown in FIG. 1 are incorporated. 2A is a cross-sectional view of the central portion in the longitudinal direction (cross section aa in FIG. 1), and FIG. 2B is a cross-sectional view between the central portion in the longitudinal direction and both ends (cross section bb in FIG. 1). 2C is a cross-sectional view (cross-section cc in FIG. 1) at both ends in the longitudinal direction. FIG. 2D is a cross-sectional view (cross-section cc in FIG. 1) at both ends in the longitudinal direction showing the work of attaching the buffer member.

  The gist of the first embodiment is to twist both ends of the buffer member 5 in the longitudinal direction and attach them to the bezel 3, and to make the corners of the buffer member 5 contact the liquid crystal panel 2 at both ends. The action and effect are that it is easier to bend when the corners are abutted than when the surface of the buffer member 5 is abutted and the whole is bent. Therefore, the load applied to the liquid crystal panel 2 is small, and the four corners warp the display surface side. The panel 2 can be held.

  As shown in FIGS. 1 and 2C, in the display device according to the first embodiment, the bezel 3 is used as a front-side casing that covers the periphery of the display area of the liquid crystal panel 2 from the front side. A buffer member 5 is provided along the four sides between the liquid crystal panel 2 and the bezel 3. The buffer member 5 has a rectangular cross section perpendicular to the longitudinal direction, and is attached to a portion of the bezel 3 facing the liquid crystal panel 2. The affixing surface to which the buffer member 5 of the bezel 3 is affixed is an inclined surface at least partially inclined with respect to a plane parallel to the liquid crystal panel 2 on each side. Specifically, the base surface 9 of the bezel 3 is formed with a pasting surface 10 inclined at both longitudinal ends of each of the four sides. In the central portion in the longitudinal direction shown in FIGS. 1 and 2 (A), the flat base surface 9 becomes the pasting surface as it is. That is, in Example 1, the sticking surface provided on the bezel 3 is a surface parallel to the liquid crystal panel 2 at the center of each side, and is an inclined surface in the vicinity of the end of each side. The pasting surface 11 shown in FIG. 2 (B) shows the section Z in FIG. 1, and the inclination of the pasting surface 11 changes temporarily between the central portion in the longitudinal direction and both end portions. In FIG. 1, the side wall 12 of the bezel 3 is drawn with a part cut to illustrate the sticking surface 10, and the buffer member 5 is drawn only on the front side and the right side in the figure, and the back side and the left side are shown. In order to explain the affixing surface 10, the buffer member 5 is not drawn. Further, although not all four sides will be explained, the contents explained for one side or two sides are similarly applied to other sides of the four sides. In addition, in FIG. 2A, FIG. 2B, and FIG. 2C, the buffer member 5 indicates the shape before bending with a solid line, and indicates the bent shape with an alternate long and short dash line.

As described above, the affixing surface 10 formed on the base surface 9 of the bezel 3 is formed by flattening the center part in the longitudinal direction of each of the four sides and inclining both ends, and between the center and both ends. It is formed by changing the inclination for a while. Accordingly, both end portions in the longitudinal direction of the buffer member 5 can be twisted and attached to the bezel 3. The cushioning member 5 attached in this way has the top surface 13 in contact with the liquid crystal panel 2 at the center in the longitudinal direction, and the corners 14 in contact with the liquid crystal panel 2 at both ends in the longitudinal direction. That is, the buffer member 5 is in surface contact with the liquid crystal panel 2 at the center of each side, and is in line contact with the liquid crystal panel 2 near the end of each side.
Further, the corner 14 of the buffer member 5 is most easily bent when the buffer member 5 is pasted at an angle of 45 degrees with respect to the base surface 9, and the pasting surfaces 10 at both ends in the longitudinal direction are the maximum with respect to the base surface 9. The inclination angle is 45 degrees.

  On the other hand, in Example 1, as shown in FIG. 2D, a guide surface 15 that guides the buffer member 5 to the application surface 10 when the buffer member 5 is attached is formed. The guide surface 15 is formed so as to form an angle of 90 degrees with the inclined pasting surface 10. This is because the cross-sectional shape perpendicular to the longitudinal direction of the buffer member 5 forms a rectangle. Since the buffer member 5 made of an elastic body such as urethane foam or synthetic rubber has an extremely long and narrow shape, it is difficult to apply it straightly. Providing the guide surface 15 is effective in improving workability. Furthermore, since the operator can align the side surface 16 of the buffer member 5 along the guide surface 15 before applying the adhesive material 7 to the application surface 10, it is possible to suppress an application error.

In addition, although Example 1 demonstrated the example of the display apparatus 1 using the liquid crystal panel 2 as a display panel, as a display panel, it is not limited to this.
In Example 1 as well, as shown in FIG. 9, the buffer member 5 is produced by punching a sheet material 6 made of an elastic body such as foamed urethane or synthetic rubber into a bi-shaped shape. An adhesive material 7 is attached to one side of the sheet material 6, and a mount 8 is applied to the adhesive material 7. The adhesive material 7 is punched out together with the sheet material 6 by a big die, and the buffer member 5 can be easily peeled from the mount 8 together with the adhesive material 7. However, the manufacturing method of the buffer member 5 is not limited to this.

  As described above, according to the first embodiment, a large stress is applied to the warped liquid crystal panel 2 using the general buffer member 5 which is created by punching the sheet material 6 and has a rectangular cross-sectional shape perpendicular to the longitudinal direction. The liquid crystal panel 2 can be held while suppressing this. According to the first embodiment, it is possible to suppress foreign matter contamination, water droplet intrusion, and dust intrusion into the apparatus.

(Example 2)
FIG. 3 is an exploded perspective view illustrating the liquid crystal panel 2, the bezel 3, and the buffer member 5 of the display device 1 according to the second embodiment. FIG. 4 is a cross-sectional view perpendicular to the longitudinal direction of the buffer member 5 of the display device 1 in which the liquid crystal panel 2, the bezel 3 and the buffer member 5 shown in FIG. .
In FIG. 3 and FIG. 4, description of parts common to the first embodiment is omitted.

3 and FIG. 4, the base surface 9 of the bezel 3 is formed with the pasting surface 10 inclined over the entire longitudinal direction of each of the four sides, and the buffer member 5 is inclined over the entire longitudinal direction. Affix to the bezel 3 in a state. That is, in Example 2, the sticking surface of the buffer member 5 provided on the bezel 3 is entirely inclined on each side. The buffer member 5 attached in this way has the corners 14 in contact with the liquid crystal panel 2 over the entire longitudinal direction. In addition, although the maximum inclination angle of the sticking surface 10 is 45 degrees with respect to the base surface 9, it may be formed by changing the inclination angle in the longitudinal direction. Moreover, the guide surface 15 which guides the buffer member 5 to the application surface 10 when the buffer member 5 is attached is formed so as to form an angle of 90 degrees with the inclined application surface 10.
The gist of the second embodiment is that although the warpage of the liquid crystal panel 2 is not remarkable, the stress applied to the liquid crystal panel 2 can be relieved even if the liquid crystal panel 2 is deformed over the entire region due to a change in environmental temperature.

  As described above, according to the second embodiment, the liquid crystal panel 2 is spread over the entire area due to a change in the environmental temperature using the general buffer member 5 which is created by punching the sheet material 6 and has a rectangular cross-sectional shape perpendicular to the longitudinal direction. If the liquid crystal panel 2 is deformed, a large stress is suppressed from being applied to the liquid crystal panel 2.

Example 3
FIG. 5 illustrates the liquid crystal panel 2, the bezel 3, and the buffer member 5 of the display device 1 according to the third embodiment. 5A is a perspective view of the bezel 3, and FIG. 5B is a longitudinal direction perpendicular to the longitudinal direction of the buffer member 5 of the display device 1 in which the liquid crystal panel 2, the bezel 3, and the buffer member 5 are incorporated. Sectional view (FIG. 5A
Bb cross section)). In FIG. 5A and FIG. 5B, description of portions common to the first and second embodiments is omitted.

In Example 3 shown in FIGS. 5 (A) and 5 (B), the base surface 9 of the bezel 3 is formed with ridges 17 over the entire longitudinal direction of each of the four sides, and part of the surface of the ridges 17. Is formed as an inclined sticking surface 18. Therefore, the buffer member 5 can be attached to the bezel 3 in a state where the buffer member 5 is inclined over the entire length direction, and the corner 14 of the buffer member 5 contacts the liquid crystal panel 2 over the entire length direction. In addition, although the maximum inclination angle of the sticking surface 18 is 45 degrees with respect to the base surface 9, it may be formed by changing the inclination angle in the longitudinal direction.
Further, ribs 19 are formed at equal intervals on the base surface 9 of the bezel 3 at positions facing the raised portions 17 with the buffer member 5 interposed therebetween. A guide surface 20 that guides the buffer member 5 to the application surface 18 when the buffer member 5 is applied is formed on a part of the rib 19 so as to form an angle of 90 degrees with the inclined application surface 18.

The gist of Example 3 was that in Example 1 and Example 2 the affixing surface 10 was the bottom surface of the groove, but in Example 3, the affixing surface 18 was an inclined surface of the raised portion. Thus, it is not limited to the bottom face of a groove | channel that the sticking surface 18 is formed. This is because when the distance between the base surface 9 of the bezel 3 and the panel 2 is to be set large for reasons such as design or when the color correction device is mounted outside the panel 2, This is effective when you want to set a large distance.

  As described above, according to the third embodiment, the shock-absorbing member 5 is attached to an arbitrary height using the general shock-absorbing member 5 that is created by punching the sheet material 6 and has a rectangular cross-sectional shape perpendicular to the longitudinal direction. be able to. According to the third embodiment, it is possible to prevent foreign matter mixing, water droplet intrusion, and dust intrusion into the apparatus.

Example 4
6A and 6B show the periphery of the liquid crystal panel 2, the backlight case 4, and the buffer member 5 of the display device 1 according to the fourth embodiment. FIG. 6A is a schematic cross-sectional view, and FIG. 6B is an enlarged cross-sectional view. . In FIG. 6A and FIG. 6B, description of portions common to the first, second, and third embodiments is omitted.

  In the first embodiment, the second embodiment, and the third embodiment, the front-side housing is the bezel 3 as a front-side exterior member that covers the display panel 2 from the front. On the other hand, in Example 4, the front case is a backlight case 4 as a front case member that covers the display panel 2 from the front of the display module 22 including the display panel 2 and the backlight 21. is there. That is, the gist of the fourth embodiment is that the front side housing is not limited to the bezel 3 as the front side exterior member.

In Example 4 shown in FIGS. 6 (A) and 6 (B), the base surface 23 of the backlight case 4 is formed with a pasting surface 24 that is inclined over the entire longitudinal direction of each of the four sides.
Therefore, the buffer member 5 can be attached to the backlight case 4 in a state of being tilted over the entire length direction, and the buffer member 5 has the corners 14 in contact with the liquid crystal panel 2 over the entire length direction. In addition, although the maximum inclination angle of the sticking surface 24 is 45 degrees with respect to the base surface 23, it may be formed by changing the inclination angle in the longitudinal direction. In addition, a guide surface 25 that guides the buffer member 5 to the application surface 24 when the buffer member 5 is applied is formed so as to form an angle of 90 degrees with the inclined application surface 24.

  The backlight case 4 may be made of metal by sheet metal processing or resinous by injection molding, and is not limited. As shown in FIGS. 6A and 6B, when the backlight case 4 is made of metal, the pasting surface 24 and the guide surface 25 are integrally processed and formed.

  As described above, according to the fourth embodiment, a large stress is applied to the warped liquid crystal panel 2 by using the general buffer member 5 that is created by punching the sheet material 6 and has a rectangular cross-sectional shape perpendicular to the longitudinal direction. The liquid crystal panel 2 can be held while suppressing this. According to the third embodiment, it is possible to prevent foreign matter mixing, water droplet intrusion, and dust intrusion into the apparatus.

1: Display device, 2: Liquid crystal panel, 3: Bezel, 5: Buffer member, 9: Base surface, 10, 11: Attached surface

Claims (13)

A display panel;
A front-side housing that covers the periphery of the display area of the display panel from the front side;
A buffer member provided along four sides between the display panel and the front housing;
Have
The buffer member has a rectangular cross section perpendicular to the longitudinal direction, and is attached to a portion of the front side housing facing the display panel,
The display device according to claim 1, wherein an attachment surface to which the buffer member of the front-side housing is attached is an inclined surface at least partially inclined with respect to a surface parallel to the display panel on each side.   The display device according to claim 1, wherein the pasting surface is entirely inclined on each side.   The display device according to claim 1, wherein the affixing surface is a surface parallel to the display panel at a central portion of each side and an inclined surface at a portion near an end portion of each side.   The display device according to claim 3, wherein an angle of inclination of the pasting surface changes temporarily from a central portion of each side to an end portion of each side.   5. The display device according to claim 3, wherein the buffer member is attached to the application surface by twisting a portion in the vicinity of an end of each side.   The display device according to claim 3, wherein the buffer member is in surface contact with the display panel at a central portion of each side, and is in line contact with the display panel in the vicinity of an end portion of each side.   The display device according to claim 1, wherein a maximum inclination angle of the sticking surface is 45 degrees.   The display device according to claim 1, wherein the sticking surface is a bottom surface of a groove provided in a portion of the front-side casing facing the display panel.   The display device according to any one of claims 1 to 7, wherein the sticking surface is a surface of a raised portion provided in a portion of the front-side casing facing the display panel.   10. The surface according to claim 1, further comprising a guide surface that forms an angle of 90 degrees with the pasting surface and guides the buffer member to the pasting surface when the cushioning member is pasted. Display device.   The display device according to any one of claims 1 to 10, wherein the buffer member is produced by punching a sheet material made of an elastic body with a bicus shape.   The display device according to claim 1, wherein the front-side casing is a front-side exterior member that covers the display panel from the front side.   The display according to any one of claims 1 to 11, wherein the front-side casing is a front-side case member that covers the display panel from the front side of a display module including the display panel and a backlight. apparatus.

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