JP2016061977A - Display device and portable terminal apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device and a portable terminal apparatus.SOLUTION: The display device has a display panel and a housing including the display panel. The display panel has a curve surface which is formed with at least one end of which is bent and at least a part of the curve surface is in close contact with the housing.SELECTED DRAWING: Figure 1A

Description

  Embodiments described herein relate generally to a flexible display device and a mobile terminal device using the display device.

  In recent years, portable terminal devices have various sizes and forms, and are used by users in various scenes. For such portable terminal devices, there are many requests from users to make it lighter and thinner, that is, thinner and lighter. In order to make the portable terminal device thin and light, it is highly expected to use a flexible display, and using this display is also highly expected from the viewpoint of impact resistance.

JP 2011-003537 A

When a thin and lightweight mobile terminal device is manufactured using a flexible display, the rigidity of the flexible display becomes difficult to maintain without increasing the weight and thickness of the terminal because the flexible display has low rigidity. When receiving, the deformation of the housing increases. For this reason, a large deformation is added to the portion where the flexible display and the casing are bonded, and the flexible display is easily peeled off from the casing.
Therefore, in a low-rigidity mobile terminal device that is thin and lightweight using a flexible display, it is required to securely hold the flexible display with respect to the housing.

  According to the embodiment, the display panel includes a display panel and a housing provided with the display panel, and the display panel is bent at least at one end to form a curved surface, and at least a part of the curved surface and the This is a display device in close contact with a housing.

It is a block diagram of the display apparatus which shows 1st Embodiment. It is a block diagram of the display apparatus in which the protective film was formed in the same 1st Embodiment. It is a block diagram of another display apparatus in which the protective film was formed in the said 1st Embodiment. It is an external view of the portable terminal device in the first embodiment. It is a block diagram of the display apparatus which shows 2nd Embodiment. It is a block diagram of the display apparatus which shows 3rd Embodiment. It is a block diagram of the display apparatus which shows 4th Embodiment. It is a block diagram of the display apparatus which shows 5th Embodiment.

[First Embodiment]
Hereinafter, a first embodiment will be described with reference to the drawings.
1A to 1C are configuration diagrams of a display device 1 used for a mobile terminal device. FIG. 1D shows an external view of the portable terminal device. In addition, this apparatus 1 shown to the figure is typical, The relationship between thickness and a planar dimension, the ratio of the thickness of each layer, etc. differ from an actual thing. Moreover, the part from which the relationship and ratio of a mutual dimension differ between each drawing of each embodiment after this 1st Embodiment is contained.

  The apparatus 1 includes a base member 3 and a frame 4 that form a housing 2. On the upper surface of the base member 3, a substrate 5 such as a mounting substrate and a battery 7 for supplying power to the substrate 5, the display panel 6 and the like are provided. A controller for performing display driving of the display panel 6 and various signal processing and control processing is mounted on the substrate 5. A frame 4 is provided on the base member 3.

  The frame 4 is formed as a quadrilateral frame. The frame 4 is made of, for example, resin. The frame 4 is provided with a display panel 6.

As the display panel 6, for example, a flexible display having flexibility is used. Hereinafter, the display panel 6 will be described as the flexible display 6. For example, an organic EL display or a reflective display using an electrophoretic method is used as the flexible display 6. The flexible display 6 can be realized by a liquid crystal display or the like.
The flexible display 6 may be a so-called in-cell panel having a built-in touch panel function or a structure in which a touch panel substrate is provided on or pasted on a display surface. Moreover, this flexible display 6 may protect the surface by providing a touch panel substrate in an overlapping manner, hard-coating the outermost surface of the display, or laminating a protective film 12. In the flexible display 6, an antireflection layer using a circularly polarizing plate or the like may be inserted as necessary.

  At opposite ends of the flexible display 6, curved surface portions 8a and 8b formed by bending the flexible display 6 are formed. If the display surface 6a is the display surface 6a on the flexible display 6 and the display back surface 6b is the opposite surface, the curved surface portions 8a and 8b are curved so that the display back surface 6b is inside. In the flexible display 6, a curved surface portion 8a is formed on one side portion, and a curved surface portion 8b is formed on the other side portion facing the one side portion. In addition, as for these curved surface parts 8a and 8b, any one curved surface part 8a or 8b may be provided in the one end part of the flexible display 6. FIG.

  The flexible display 6 is bonded to the frame 4 with an adhesive 9 at the curved surface portions 8a and 8b. For example, since the concave curved portions 4a and 4b are formed inside the frame 4, the convex shapes of the curved surface portions 8a and 8b of the flexible display 6 are fitted into the concave shapes of the curved portions 4a and 4b. And bonded by the adhesive 9. In this case, the flexible display 6 is in close contact with the frame 4 via the adhesive 9 at the curved surface portions 8a and 8b.

  A gap is formed between the concave surfaces of the curved portions 4a and 4b of the frame 4 and the convex surfaces of the curved surface portions 8a and 8b of the flexible display 6, and the adhesive 9 is applied in the gaps. You may do it. Further, a gap is not formed between the concave surface of each of the curved portions 4a and 4b and the convex surface of each of the curved surface portions 8a and 8b. It may be. It should be noted that the entire surface of the curved portions 4a and 4b and the convex surfaces of the curved surface portions 8a and 8b are not limited to be bonded with the adhesive 9, but the adhesive 9 is applied to a part thereof. And may be bonded.

Thus, each curved surface part 8a, 8b is formed in the both ends of the flexible display 6, and since it adhere | attaches with the adhesive agent 9 with respect to the flame | frame 4 in these curved surface parts 8a, 8b, each curved surface part 8a, 8b is attached to the flexible display 6. Is covered by the frame 4.
You may form the protective film 12 on the surface like FIG. 1B. By attaching the protective film 12 including the region of the frame 4, it is possible to eliminate a surface step and realize a terminal having an excellent design. In addition, since the protective film 12 and the display panel 6 sandwich a part of the frame 4, the flexible display 6 and the frame 4 are difficult to peel off when bent. The protective film 12 may have an optical function such as an antireflection function such as a circularly polarizing plate, or may have a touch panel function.

  The effect of suppressing peeling of the flexible display 6 is further increased by employing a structure in which a part of the side surface of the frame 4 is covered with the protective film 12 as shown in FIG. 1C.

  An area that is not covered by the frame 4 in the flexible display 6 is referred to as a first area E1, and an area that is covered by the frame 4 is referred to as a second area E2. Of these, the first area E1 is not covered by the frame 4, and an image displayed in the first area E1 can be viewed, and thus is set as an image display area E1. Since the second region E2 is covered by the frame 4, when the resin 4 and the adhesive 9 are not transparent materials, it is impossible to see the image displayed in the second region E2, and the image is displayed in advance. The non-display area E2 where no display is performed.

  Thus, the display of the image in the display area E1 of the image on the flexible display 6 and the non-display of the image in the non-display area E2 are controlled by the controller formed on the substrate 5.

The flexible display 6 includes a display area and a non-display area of the flexible display 6 itself, in addition to an image display area E1 and a non-display area E2 that are display-controlled by the controller. For example, a peripheral portion of the flexible display 6 includes a portion where a mounting circuit for driving the flexible display 6 is provided, and the portion is a non-display area. The display area and non-display area of the flexible display 6 itself may or may not coincide with the display area E1 and non-display area E2. Note that the display area of the flexible display 6 itself may be covered by the frame 4. In this case, the display area on the flexible display 6 may be controlled by the controller mounted on the substrate 5, and an image may be displayed on the display area of the flexible display 6 that is not covered by the frame 4.
By using a transparent material for the resin 4 and the adhesive 9, it is also possible to display on at least a part of the side surface of the housing 2.

  As described above, according to the first embodiment, the curved surface portions 8a and 8b obtained by bending the flexible display 6 are formed at the opposite ends of the flexible display 6, and the curved surface portions 8a and 8b are framed. 4, the adhesive area between the flexible display 6 and the housing 2 can be increased without greatly increasing the frame 4, and the space between the flexible display 6 and the housing 2 can be strengthened. Can be held. Thereby, when the housing 2 receives an external force, the housing 2 is deformed, and even if a large deformation is applied to an area where the flexible display 6 and the housing 2 are bonded, the flexible display 6 is 2 is less likely to be peeled off. As a result, in a low-rigidity portable terminal that is thin and lightweight using the flexible display 6, the flexible display 6 can be firmly held with respect to the housing 2.

  When the curved surface portions 8 a and 8 b of the flexible display 6 are bonded to the frame 4, the original display area of the flexible display 6 may be covered by the frame 4. Since the display area in the flexible display 6 may be controlled by the mounted controller, the length for forming the curved surface portions 8a and 8b of the flexible display 6 can be arbitrarily determined.

[Second Embodiment]
Next, a second embodiment will be described with reference to the drawings. The same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
FIG. 2 shows a configuration diagram of the display device 1 used in the mobile terminal device. In the present apparatus 1, the lengths of the curved surface portions 8a and 8b in the flexible display 6 are set to be long. As a result, the flexible display 6 is bonded to the base member 3 in addition to bonding to the frame 2, and forms a larger bonding area than the bonding area of the first embodiment.

  That is, the curved surface portions 8 a and 8 b at both ends of the flexible display 6 are bonded to the display surface 6 a of the flexible display 6 and the frame 2 by the bending of the flexible display 6, and in addition to this, the display surface of the flexible display 6 6a and the base member 3 are bonded by an adhesive 9.

  Thereby, compared with the said 1st Embodiment, this 2nd Embodiment is a part which adhere | attaches the display surface 6a of the flexible display 6, and the base member 3, ie, the base member 3 in the flexible display 6. FIG. The adhesion area is widened by an area corresponding to the facing portion H facing the.

  In addition, in this apparatus 1, although the length of each curved-surface part 8a, 8b of the both ends in the flexible display 6 is set long, it is not restricted to this, At least one end part of each curved-surface part 8a, 8b of the flexible display 6 The length of the curved surface portion 8a or 8b may be set longer.

  As described above, according to the second embodiment, by increasing the bonding area of the flexible display 6, in addition to the effect of the first embodiment, the space between the flexible display 6 and the housing 2 can be further increased. It can be held firmly.

[Third Embodiment]
Next, a third embodiment will be described with reference to the drawings. The same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
FIG. 3 shows a configuration diagram of the display device 1 used in the mobile terminal device. In the apparatus 1, core members 10 a and 10 b as bending prevention members for the apparatus 1 are provided inside the curved surface portions 8 a and 8 b of the flexible display 6, respectively. These core materials 10a and 10b are desirably highly rigid as compared with the frame 4 of the present apparatus 1. For example, by using a material such as a resin whose Young's modulus is 100 times or more than the Young's modulus of the frame 4, Demonstrate the effect. In addition, although the core materials 10a and 10b are provided inside the both curved surface portions 8a and 8b, they may be provided on either one of the curved surface portions 8a or 8b.

  The core material 10a and the curved surface portion 8a, or the core material 10b and the curved surface portion 8b may be fixed by the adhesive 9, but are pressed by the core material 10a in the direction of the curved surface portions 8a and 8b of the flexible display 6 and fixed. Thus, when the core material 10a and the curved surface portions 8a and 8b of the flexible display 6 are displaced, the structure is strong against bending without damaging the flexible display 6 of the housing 2.

  Thus, according to the third embodiment, since the core members 10a and 10b are provided inside the curved surface portions 8a and 8b of the flexible display 6, in addition to the effects of the first embodiment, The bending in the vertical direction can be suppressed without suppressing the bending in the direction parallel to the curved surface portions 8a and 8b. When two or more types of bending occur on the flexible display 6, there may be a region that bends with a very small radius of curvature in a part of the vicinity where the bending intersects. This can lead to poor display. If the bending direction can be controlled by using the core material 10a as described above, such defects can be reduced.

[Fourth Embodiment]
Next, a fourth embodiment will be described with reference to the drawings. The same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
FIG. 4 shows a configuration diagram of the display device 1 used in the mobile terminal device. In the present apparatus 1, the frame 4 holds the flexible display 6 in the state facing inward at each of the opposing sides that hold the curved surface portions 8 a and 8 b of the flexible display 6. As a result, a force that opposes the force directed toward the inside of the frame 4, that is, forces F <b> 1 and F <b> 2 in the direction toward the outside from the flexible display 6 act on the frame 4. By these forces F <b> 1 and F <b> 2, the pulling force is applied to the flexible display 6 from the opposing sides in the flexible display 6. Thereby, formation of the uneven | corrugated shape in the flexible display 6 is suppressed.

  On each side of the frame 4, forces F <b> 1 and F <b> 2 are applied in the direction toward the outside in the opposite direction from the state facing the inside. Due to these forces F1 and F2, the flexible display 6 is applied with a force pulling each other in the same direction as each of the forces F1 and F2 from the opposite sides of the flexible display 6. Thereby, tension is applied to the surface of the flexible display 6, and the formation of the uneven shape on the surface of the flexible display 6 is suppressed.

[Fifth Embodiment]
Next, a fifth embodiment will be described with reference to the drawings. The same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
FIG. 5 shows a configuration diagram of the display device 1 used in the mobile terminal device. In the present apparatus 1, the curved surface portion 8b of the flexible display 6 and the substrate 5 such as a mounting substrate are connected by one or both of electrical and mechanical. In addition, you may connect the curved surface part 8a of the flexible display 6, and the board | substrate 5 by either one or both electrically or mechanically.

The curved surface portion 8b of the flexible display 6 is provided in the peripheral portion of the flexible display 6, and a mounting circuit and the like for driving the flexible display 6 are formed in the peripheral portion. Therefore, by forming the curved surface portions 8 a and 8 b on the flexible display 6, the distance between the curved surface portions 8 a and 8 b and the substrate 5 is reduced, and the curved surface portions 8 a and 8 b and the substrate 5 are on the base member 3. It is equivalent to being implemented in This facilitates electrical or mechanical connection between the curved surface portions 8a and 8b and the substrate 5.
Therefore, the flexible display 6 and the substrate 5 can be directly connected without using an intermediate substrate or the like, and the number of steps in manufacturing the apparatus 1 can be reduced, and the costs such as member costs can be reduced. .
In this way, by pulling out the signal input portion of the flexible display 6 through the curved surface portions 8a and 8b, the display surface 6a of the flexible display 6 and the substrate 5 can be connected via an anisotropic conductive resin or the like. Become.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  1: display device, 2: housing, 3: base member, 4: frame, 5: substrate, 6: display panel, 7: battery, 8a, 8b: curved surface portion, 6a: display surface of display panel, 6b: display Display back surface of panel, 9: adhesive, 10a, 10b: core material, 12: protective film.

Claims (12)

A display panel;
A housing provided with the display panel;
Have
The display panel has a curved surface portion formed by bending at least one end portion, and at least a part of the curved surface portion and the housing are in close contact with each other.
A display device characterized by that.   The display device according to claim 1, wherein the close contact is formed by an adhesive member. The curved surface portions are formed at both ends of the display panel,
At least a part of these curved surface portions are respectively bonded to the casing.
The display device according to claim 1. In the display panel, a first region and a second region are formed by forming the curved surface portion,
Display is performed in the first area,
In the second region, at least a part of the curved surface portion is bonded to the housing;
The display device according to claim 1. The housing includes a frame body that holds the display panel,
The curved portion of the display panel is bonded to at least the frame;
The display device according to claim 1.   The display device according to claim 1, wherein the curved surface portion of the display panel is set to be long so that a large area of adhesion of the curved surface portion to the housing is formed. The housing includes a frame body that holds the display panel, and a base member that is disposed to face the display panel.
The curved surface portion of the display panel is bonded to the frame body and the base member.
The display device according to claim 6.   The display device according to claim 1, wherein a bending prevention member for the device is provided inside the curved surface portion formed on the display panel.   The display device according to claim 8, wherein the close contact is formed by being sandwiched between the housing and the bend preventing member. The curved surface portions are respectively formed at opposite end portions of the display panel,
The housing holds the display panel by applying force in the direction of both end portions through the curved surface portions.
The display device according to claim 1. Including a mounting substrate disposed in the housing;
The curved surface portion of the display panel is connected to the mounting substrate by one or both of electrical and mechanical,
The display device according to claim 1.   A portable terminal device comprising the display device according to claim 1.