JP2010085453A - Display device and portable terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device and a portable terminal device in which repulsion force of a cushion member applied to a display window part is reduced while damage of the display window part and an electronic circuit part or the like by impact can be prevented. <P>SOLUTION: A display side body 1 includes a sponge member 30 provided between a liquid crystal display module 20 displaying a picture and a tempered glass window 10, and a double-sided tape 40 bonding the sponge member 30 and the tempered glass window 10. The sponge member 30 is provided at a position including a driver IC22 of the liquid crystal display module 20 projected to the tempered glass window 10 side. In the double-sided tape 40, a notch part 41 is provided at a position corresponding to the driver IC22. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display device such as a liquid crystal display and an organic EL (Electro Luminescence) display, and a portable terminal device such as a mobile phone, a PHS (Personal Handy-phone System) terminal, and a portable game machine.

2. Description of the Related Art Conventionally, in display devices, a cushion member is provided around the display portion of the display module to absorb the shock between the display module and the display module in order to prevent dust from entering the display module and dust. . The cushion member is usually bonded to the display window portion with an adhesive sheet such as a double-sided tape.
In Patent Document 1, in a liquid crystal display device in which a buffer material is sandwiched between a liquid crystal panel element and a fixed frame formed by drilling a display window, the buffer material is made of an elastic double-sided tape, and the liquid crystal panel element A liquid crystal display device is disclosed in which a frame and a fixed frame are bonded.
Japanese Utility Model Publication No. 4-40272

  FIG. 6 is a cross-sectional view showing a cushion member 100 provided in a conventional display device. The cushion member 100 is used by being compressed to some extent after incorporation in order to fill the gap between the display module 110 and the display window 120. The cushion member 100 is bonded to the display window 120 with an adhesive sheet 130. The display module 110 is provided with an electronic circuit portion 111 such as a driver IC that protrudes toward the display window portion 120, and the cushion member 100 is provided so as to include a position where the electronic circuit portion 111 is provided. The circuit unit 111 is protected from impact, dust, and the like.

However, since the electronic circuit unit 111 has a convex shape, the compression rate of the cushion member 100 at a position corresponding to the electronic circuit unit 111 is increased after incorporation. When the compression rate of the cushion member 100 is increased, the repulsive force is increased, so that the display window portion 120 may be pushed up to cause floating.
If the thickness of the cushion member 100 is reduced in order to reduce the repulsive force of the cushion member 100, the shock cannot be sufficiently absorbed, and the display window portion 120, the electronic circuit portion 111, and the like may be damaged.

  The present invention has been made in view of the above problems, and can reduce the repulsive force of the cushion member applied to the display window, and can prevent damage to the display window, the electronic circuit, and the like due to an impact, and It aims at providing a portable terminal device.

In order to solve the above-described problems, the present invention includes a cushion member provided between a display module that displays an image and a display window, and an adhesive sheet that bonds the cushion member and the display window. In the display device, the cushion member is provided at a position including the electronic circuit portion of the display module protruding to the display window portion side, and the adhesive sheet has a concave portion at a position corresponding to the electronic circuit portion. The configuration of being provided is adopted.
By adopting such a configuration, in the present invention, since the concave portion is formed in the adhesive sheet, it is possible to form the relief of the cushion member at a position corresponding to the electronic circuit portion. That is, it is possible to prevent the cushion member from being compressed at a position corresponding to the electronic circuit portion.

Moreover, in this invention, the said recessed part employ | adopts the structure that it is a notch part penetrated in the thickness direction of the said adhesive sheet.
By adopting such a configuration, in the present invention, it is possible to form a relief corresponding to the thickness of the adhesive sheet by notching the adhesive sheet at a position corresponding to the electronic circuit portion. That is, it can prevent more reliably that the compression rate of the cushion member in the position corresponding to an electronic circuit part becomes high.

In the present invention, the cushion member has a constant thickness.
By employ | adopting such a structure, in this invention, it can prevent that the impact resistance of a cushion member is impaired.

Moreover, in this invention, the structure that the said adhesive sheet consists of a double-sided tape is employ | adopted.
By employ | adopting such a structure, in this invention, a cushion member and a display window part are adhere | attached through a double-sided tape.

Moreover, in this invention, the structure that the said cushion member consists of foaming urethane resin members is employ | adopted.
By adopting such a configuration, in the present invention, the foamed urethane resin member reduces the impact on the display module and prevents dust from entering.

Moreover, in this invention, the structure of setting the compression rate of the said urethane foam resin member of the position corresponding to the said electronic circuit part to 20% or less is employ | adopted.
By adopting such a configuration, in the present invention, the repulsive force of the cushion member is applied to the display window portion, and the floating can be reliably prevented.

In the present invention, the electronic circuit unit employs a driver IC that controls the operation of the display module.
By adopting such a configuration, in the present invention, the driver IC can be protected from an impact or the like by the cushion member, and a stable display performance can be obtained.

  Moreover, in this invention, the portable terminal device provided with the said display apparatus is obtained, and the failure | damage of a display apparatus by accidental fall etc. is suppressed.

According to the present invention, there is provided a display device including a cushion member provided between a display module that displays an image and a display window portion, and an adhesive sheet that bonds the cushion member and the display window portion, The cushion member is provided at a position including the electronic circuit portion of the display module protruding to the display window portion side, and the adhesive sheet has a configuration in which a concave portion is provided at a position corresponding to the electronic circuit portion. By adopting it, a concave portion is formed in the adhesive sheet, so that the relief of the cushion member can be formed at a position corresponding to the electronic circuit portion. That is, it is possible to prevent the cushion member from being compressed at a position corresponding to the electronic circuit portion.
Therefore, the present invention has an effect of obtaining a display device capable of reducing the repulsive force of the cushion member applied to the display window portion and preventing damage to the display window portion and the electronic circuit portion due to impact.

  Next, this embodiment of the present invention will be described with reference to the drawings. In the following description, an example in which the display device of the present invention is applied to a PHS (Personal Handy-phone System) terminal will be described.

First, the configuration of the PHS terminal X will be described with reference to FIG.
FIG. 1 is a perspective view showing an appearance of the PHS terminal X in the present embodiment.
The PHS terminal X of the present embodiment is of a folding type in which a display side main body (display device) 1 and an operation side main body 2 are connected by a hinge structure 3 as shown in FIG.

The display-side body 1 includes a display-side housing 4 that forms an exterior of the display-side body 1, a display unit 5 that is provided on one surface side of the display-side housing 4 (display surface side 1 a), and a display unit 5. And the earpiece 6 provided on the same surface side and above the display unit 5.
The display unit 5 is formed from, for example, a liquid crystal display, an organic EL (Electro Luminescence) display, or the like, and displays a desired image, characters, and the like. The display unit 5 is fitted in a substantially central portion of the display-side housing 4. Provided. In the present embodiment, the display unit 5 includes a liquid crystal display.
The earpiece 6 is formed above the display unit 5 and communicates with a speaker (not shown) provided in the display-side housing 4 and the outside.

The operation side main body 2 includes an operation side housing 7 that forms an exterior of the operation side main body 2, an operation unit 8 provided on one surface side (operation surface side 2 a) of the operation side body 7, It has a configuration having a mouthpiece 9 provided on the same plane and below the operation unit 8.
The operation unit 8 includes a power key, a numeric keypad, and various function keys, and is configured to receive various operation instructions from the user.
The mouthpiece 9 is formed below the operation unit 8 and communicates with a microphone (not shown) provided in the operation side housing 7.

Next, the configuration of the display-side main body 1 will be described in detail.
FIG. 2 is a plan view showing the display-side main body 1 in the present embodiment.
3 is a cross-sectional view taken along line AA in FIG.
FIG. 4 is a plan view showing the liquid crystal display module 20 in the present embodiment.
FIG. 5 is a plan view showing the outer shape of the sponge member 30 and the double-sided tape 40 in the present embodiment.
As shown in FIGS. 2 and 3, the display-side main body 1 includes a tempered glass window (display window portion) 10 provided on the display surface side 1 a and a liquid crystal provided on the back side of the tempered glass window 10 to display an image. Display module (display module) 20, sponge member (cushion member) 30 provided between tempered glass window 10 and liquid crystal display module 20, and double-sided tape (adhesive sheet) for bonding sponge member 30 and tempered glass window 10 40). A plastic window may be used instead of the tempered glass window 10. In the case of a plastic window, the anti-scattering film 11 described later is not attached.

  The tempered glass window 10 is fitted into the display surface side 1a of the display-side housing 4 and is configured to protect the liquid crystal display module 20 from scratches and the like. As shown in FIG. 3, the tempered glass window 10 has an anti-scattering film 11 attached to one surface on which the liquid crystal display module 20 is provided.

As shown in the plan view of FIG. 4, the liquid crystal display module 20 schematically includes a liquid crystal display panel 21 that displays an image, and a driver IC (electronic circuit unit) 22 that displays an image on the liquid crystal display panel 21.
The liquid crystal display panel 21 generally includes a color filter having pixels of each color of RGB, a liquid crystal plate in which liquid crystal is sealed, and an illumination element that illuminates via the color filter and the liquid crystal plate (all not shown).
The driver IC 22 is configured to display a desired image on the liquid crystal display panel 21 by electrically controlling the alignment state of the liquid crystal. In the present embodiment, a substantially rectangular parallelepiped shape that extends in the width direction of the liquid crystal display module 20 (left and right direction in FIG. 4) and protrudes to the tempered glass window 10 side (the front side in the vertical direction in FIG. 4). Have. The driver IC is provided on the same plane as the liquid crystal display panel 21 and on the hinge structure 3 side (the lower side on the paper surface). The driver IC has a height of about 0.2 mm.

  The sponge member 30 protects the liquid crystal display module 20 from impact and dust intrusion, and is provided so as to surround the liquid crystal display panel 21 (see FIG. 5). Further, the position where the sponge member 30 is provided includes a position corresponding to the driver IC 22. The sponge member 30 of this embodiment is formed from a urethane foam resin member having a certain thickness. The thickness of the sponge member 30 of this embodiment is set to about 0.5 mm.

The double-sided tape 40 is provided between the sponge member 30 and the tempered glass window 10, and an adhesive layer is formed on both surfaces of the sponge member 30 side and the tempered glass window 10 side. The thickness of the double-sided tape 40 of this embodiment is set to about 0.1 mm.
The double-sided tape 40 has a rectangular opening at a position corresponding to the liquid crystal display panel 21, and a notch (concave portion) 41 is provided at a position corresponding to the driver IC 22. The notch 41 is formed so as to penetrate in the thickness direction of the double-sided tape 40. The double-sided tape 40 is configured to adhere to the sponge member 30 in substantially the entire area except for the notch portion 41.

Next, the operation of the above configuration will be described with reference to FIG.
As shown in FIG. 3, when the liquid crystal display module 20, the sponge member 30, the double-sided tape 40, and the tempered glass window 10 are assembled in this order on the display-side housing 4, the sponge member 30 is compressed in the thickness direction. In addition to preventing dust from entering the liquid crystal display panel 21, the impact received from the outside between the tempered glass window 10 and the liquid crystal display module 20 is absorbed. In FIG. 3, a gap is formed between the sponge member 30 and the anti-scattering film 11, but this is to clarify the difference from the conventional one shown in FIG. 30 expands to fill the gap.

  Here, since the liquid crystal display module 20 is provided with a driver IC 22 that protrudes toward the tempered glass window 10, the sponge member 30 provided at a position including the driver IC 22 is compressed more than at other positions. However, since the notch 41 is formed at a position corresponding to the driver IC 22, the sponge member 30 can escape to the tempered glass window 10 side by the thickness of the double-sided tape 40.

Specifically, since the thickness of the sponge member 30 is 0.5 mm and the height of the driver IC 22 is 0.2 mm, in the related art shown in FIG. 6, the position corresponding to the driver IC 22 is compressed more than the other positions. The rate increases by about 40%. On the other hand, in the present embodiment shown in FIG. 3, the notch 41 forms the relief of the sponge member 30 by 0.1 mm which is the thickness of the double-sided tape 40, so the compression rate at the position corresponding to the driver IC 22 increases. The minutes are reduced to about 20%.
As described above, since the compression rate of the sponge member 30 at the position corresponding to the driver IC 22 is prevented from increasing, the repulsive force is reduced and the floating of the tempered glass window 10 can be suppressed.

Therefore, according to the above-described embodiment, the sponge member 30 provided between the liquid crystal display module 20 that displays an image and the tempered glass window 10, and the double-sided tape 40 that bonds the sponge member 30 and the tempered glass window 10. The sponge member 30 is provided at a position including the driver IC 22 of the liquid crystal display module 20 protruding to the tempered glass window 10 side, and the double-sided tape 40 is a position corresponding to the driver IC 22. Since the notch 41 is formed in the double-sided tape 40 by adopting the configuration in which the notch 41 is provided in the sponge member 30 corresponding to the thickness of the double-sided tape 40 at a position corresponding to the driver IC 22. It becomes possible to form an escape. That is, it is possible to prevent the compression rate of the sponge member 30 at the position corresponding to the driver IC 22 from increasing.
Therefore, the present invention has an effect of obtaining the display-side main body 1 that can reduce the repulsive force of the sponge member 30 applied to the tempered glass window 10 and can prevent damage to the tempered glass window 10 and the driver IC 22 due to impact.

  Moreover, in this embodiment, the sponge member 30 can prevent the impact resistance of the sponge member 30 from being impaired by adopting a configuration in which the thickness is constant.

  Moreover, in this embodiment, the portable terminal device provided with the said display side main body 1 is obtained, and the damage by accidental fall etc. is suppressed.

  As mentioned above, although preferred embodiment of this invention was described referring drawings, this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

  For example, in the above-described embodiment, it has been described that the relief of the sponge member 30 is formed by providing the double-sided tape 40 with the notch portion 41 penetrating in the thickness direction, but the present invention is limited to the above configuration. Instead, for example, the recess of the sponge member 30 may be formed by forming a recess having a predetermined depth in the double-sided tape 40 at a position corresponding to the driver IC 22. Further, if necessary, a configuration in which a recess is formed in the scattering prevention film 11 or the tempered glass window 10 to form a relief of the sponge member 30 may be used.

  Further, for example, in the above-described embodiment, it has been described that the cushion member is configured by the sponge member 30 made of the urethane foam resin member. However, the cushion member is made of, for example, another resin material or rubber material having elasticity. There may be. In the above-described embodiment, it has been described that the adhesive sheet is configured by the double-sided tape 40. However, the adhesive sheet may be, for example, a pressure-sensitive adhesive film, a thermosetting adhesive film, or the like.

  In the present invention, if the compression ratio of the foamed urethane resin member at the position corresponding to the driver IC is designed to be 20% or less, repulsive force is applied to the tempered glass window 10 to reliably prevent floating. be able to. In this case, it is desirable to select the optimal thickness of the urethane foam resin member, the height of the driver IC, and the thickness of the double-sided tape so that the compression ratio of the urethane foam resin member is 20% or less.

It is a perspective view which shows the external appearance of the PHS terminal in embodiment of this invention. It is a top view which shows the display side main body in embodiment of this invention. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. It is a top view which shows the liquid crystal display module in embodiment of this invention. It is a top view which shows the external shape of the sponge member and double-sided tape in embodiment of this invention. It is sectional drawing which shows the conventional display apparatus.

Explanation of symbols

  X: PHS terminal (mobile terminal device), 1 ... display side main body (display device), 1a ... display surface side, 4 ... display side housing, 5 ... display unit, 10 ... tempered glass window (display window unit), 11 ... anti-scattering film, 21 ... liquid crystal display panel, 20 ... liquid crystal display module (display module), 22 ... driver IC (electronic circuit part), 30 ... sponge member (cushion member), 40 ... double-sided tape (adhesive sheet), 41 ... Notch (recess)

Claims (8)

A display device including a cushion member provided between a display module that displays an image and a display window portion, and an adhesive sheet that bonds the cushion member and the display window portion,
The cushion member is provided at a position including the electronic circuit portion of the display module protruding to the display window portion side,
The said adhesive sheet is provided with the recessed part in the position corresponding to the said electronic circuit part, The display apparatus characterized by the above-mentioned.   The display device according to claim 1, wherein the concave portion is a cutout portion penetrating in a thickness direction of the adhesive sheet.   The display device according to claim 1, wherein the cushion member has a constant thickness.   The display device according to claim 1, wherein the adhesive sheet is made of double-sided tape.   The display device according to claim 1, wherein the cushion member is made of a urethane foam resin member.   The display device according to claim 5, wherein a compression ratio of the urethane foam resin member at a position corresponding to the electronic circuit portion is set to 20% or less.   The display device according to claim 1, wherein the electronic circuit unit includes a driver IC that controls an operation of the display module.   A mobile terminal device comprising the display device according to claim 1.

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