JP2010271631A - Method for manufacturing display device, double-sided adhesive set, and display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a liquid crystal display device facilitating reworking property. <P>SOLUTION: The method includes such a process that although a portion of a liquid crystal panel adheres via a double-sided adhesive layer BR to a portion of a backlight unit, the double-sided adhesive layer BR adheres to only one of another portion of the liquid crystal panel and another portion of the backlight unit so as to separate the another portion of the liquid crystal display panel from the another portion of the backlight unit. Thus, the liquid crystal panel does not adhere at once to the whole first adhesive layer of the double-sided adhesive layer BR. Moreover, the liquid crystal display panel is tilted against the backlight unit and a portion of the liquid crystal display panel disposed on a small separator piece 12S is not fixed to the backlight unit. Thus, various types of quality inspection processes are carried out on the display device in a temporary joined state. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a display device such as a liquid crystal display device, a double-sided adhesive set used for manufacturing a display device, and the display device itself.

  In a liquid crystal display device, a liquid crystal display panel (display panel) is supported by a member such as a backlight unit (base member). And between this backlight unit and a liquid crystal display panel, the adhesive member for fixing both (for example) is interposed.

  As an example of disclosure of such an adhesive member, Patent Document 1 is cited. In Patent Document 1, the adhesive member is designed to have a specific range of adhesive strength. This is to facilitate rework (disassembling the once bonded liquid crystal display panel and the backlight unit) in the manufacturing process of the liquid crystal display device.

JP 2006-106417 A

  However, in the liquid crystal display device described in Patent Document 1, the liquid crystal display panel and the backlight unit are bonded at a time through the adhesive member without any gap. Therefore, when removing the liquid crystal display panel from the backlight unit for rework, it is difficult to lift the liquid crystal display panel.

  Moreover, in patent document 1, although the use of the double-sided adhesive member in which the adhesive force (adhesive force) is different for each adhesive surface is also conceivable, such an adhesive member is inevitably expensive.

  The present invention has been made to solve the above problems. And the objective is to provide the manufacturing method of the display apparatus etc. which made reworkability easy.

  A manufacturing method of a display device including a bonding process in which a display panel that displays an image and a base member that supports the display panel is bonded using an bonding member is as follows. In other words, in the bonding step, a part of the display panel and a part of the base member are bonded via the adhesive member, but only one of the other part of the display panel and another part of the base member is used. In addition, a temporary bonding step is included in which another part of the display panel and another part of the base member are separated from each other by bonding the bonding member.

  With this configuration, the display panel is not bonded to the base member at a time. That is, the display panel and the base member are temporarily fixed. In such a state, the display panel can be easily peeled off from the base member only by lifting a part of the display panel that is not stopped by the adhesive member. In addition, the adhesive member does not need to be designed to have a specific range of adhesive strength, and thus tends to be inexpensive. Therefore, in this display device manufacturing method, not only reworkability is improved, but also an adhesive member specially designed for adhesive strength may not be used.

  There are many types of adhesive members. For example, a double-sided adhesive type adhesive member is given as an example. In the case of such a double-sided adhesive member, it is desirable that the display device be manufactured as follows.

  More specifically, the first adhesive surface, which is one of the adhesive surfaces of the adhesive member, is covered with a release material, and is a first adhesive surface that is exposed when a part of the release material is peeled off, and the back surface of the first adhesive surface. A part of the display panel and a part of the base member are bonded to the second bonding surface. On the other hand, when the release material remaining on the first adhesive surface is interposed between the display panel and the base member, another part of the display panel is separated from another part of the base member.

  In the bonding process, in addition to the temporary bonding process, the release material remaining on the first bonding surface is peeled off, and another part of the display panel and another of the base member are separated by the first bonding surface and the second bonding surface. It is desirable to include a final bonding step in which a part is bonded. The final display device is completed through such a final process.

  By the way, it is desirable that a part of the release material to be peeled off from the first adhesive surface in the temporary adhesion process becomes a handle part, and a part of the release material to be peeled off from the first adhesive surface in the final adhesion process becomes a handle part. . However, the present invention is not limited to this, and the first handle portion is attached to the release material that is peeled off from the first adhesive surface in the temporary bonding step, and the second release material is peeled off from the first adhesive surface in the final adhesion step. The handle part of can be attached.

  When a double-sided adhesive member (double-sided adhesive member) is used, the adhesive member is preferably a double-sided adhesive set as described below. That is, the double-sided adhesive set for adhering a display panel for displaying an image and a base member supporting the display panel includes a double-sided adhesive member having both surfaces as an adhesive surface, and a first one of both surfaces of the double-sided adhesive member. And a release material that covers the adhesive surface, and the release material preferably has a split-type structure that can be partially peeled off.

  When each of the divided release materials is a divided release material piece, it is desirable that a part of each divided release material piece becomes a handle portion. However, the present invention is not limited to this, and when each of the divided release materials is a divided release material piece, a handle portion may be attached to each divided release material piece.

  Note that a display device including the display panel and the base member connected by the double-sided connection member as described above can be said to be the present invention.

  According to the method for manufacturing a display device of the present invention, the display panel and the base member are not bonded at a time. Therefore, in this display device manufacturing method, reworkability is improved.

These are top views of a double-sided tape. FIG. 2 is a cross-sectional view taken along line B-B ′ of the double-sided tape shown in FIG. 1. FIG. 2 is a cross-sectional view taken along line C-C ′ of the double-sided tape shown in FIG. 1. These are sectional drawings of the double-sided adhesive layer contained in the double-sided tape. Then, (A)-(D) are sectional drawings which show the manufacturing process of a liquid crystal display device. (E) is sectional drawing which shows the manufacturing process of a liquid crystal display device. These are sectional drawings which show the manufacturing process of a liquid crystal display device. These are sectional drawings which show the manufacturing process of a liquid crystal display device. These are sectional drawings of the liquid crystal display device containing a spacer. These are sectional drawings which show the manufacturing process of the liquid crystal display device containing a spacer. These are sectional drawings of the liquid crystal display device containing a spacer. These are sectional drawings which show the manufacturing process of the liquid crystal display device containing a spacer. (A) to (C) are plan views of the double-sided tape. (A) to (C) are plan views of the double-sided tape. Then, (A) is explanatory drawing which shows the manufacturing process (1st manufacturing process) of a double-sided tape, (B) is explanatory drawing which shows the manufacturing process (2nd manufacturing process) of a double-sided tape. These are simplified sectional drawings of the 2nd press apparatus used in the 2nd manufacturing process of a double-sided tape. FIG. 3 is an exploded perspective view of a liquid crystal display device. FIG. 18 is a cross-sectional view taken along line A-A ′ of the liquid crystal display device illustrated in FIG. 17.

[Embodiment 1]
The following describes one embodiment with reference to the drawings. For convenience, hatching, member codes, and the like may be omitted, but in such a case, other drawings are referred to. On the other hand, hatching may be given for the sake of convenience even in drawings other than cross-sectional views. The numerical examples described are only examples and are not limited to the numerical values.

  17 is an exploded perspective view showing the liquid crystal display device 79, and FIG. 18 is a cross-sectional view taken along the line AA ′ in FIG. 17 (for convenience, a double-sided adhesive layer BR described later is omitted in FIG. 17). In FIG. 18, a front housing HG1 and an FPC board 65 described later are omitted). As shown in these drawings, a liquid crystal display device 79 includes a liquid crystal display panel 69, a backlight unit (illumination device) 59 that supplies light to the liquid crystal display panel 69, and a housing HG (front housing) that sandwiches them. HG1 and back housing HG2).

  The liquid crystal display panel 69 includes an active matrix substrate 61, a counter substrate 62, polarizing films 63 and 64, and a panel FPC (Flexible Printed Circuits) substrate 65.

  More specifically, in the liquid crystal display panel 69, an active matrix substrate 61 including a switching element such as a TFT (Thin Film Transistor) and a counter substrate 62 facing the active matrix substrate 61 are bonded together with a sealing material (not shown). In the liquid crystal display panel 69, liquid crystal (not shown) is injected into the gap between the substrates 61 and 62.

  The polarizing film 63 is attached to the active matrix substrate 61 side, while the polarizing film 64 is attached to the counter substrate 62 side, and both the polarizing films 63 and 64 sandwich the active matrix substrate 61 and the counter substrate 62 (note that The polarizing film 63 is the back polarizing film 63, and the polarizing film 64 is the front polarizing film 64).

  A panel FPC (Flexible Printed Circuits) substrate 65 is a flexible substrate including supply wiring (not shown) through which a current flows. The panel FPC board PB1 is electrically and physically connected to the active matrix board 61.

  The liquid crystal display panel 69 as described above displays an image using the change in transmittance caused by the inclination of the liquid crystal molecules.

  Next, the backlight unit 59 (base member) that supports the liquid crystal display panel 69 will be described. Such a backlight unit 59 includes an LED (Light Emitting Diode) module MJ, a light guide plate 53, a reflection sheet 54, a diffusion sheet 55, optical sheets 56 and 57, and a built-in chassis CS.

  The LED module MJ is a module that emits light, and includes a mounting substrate 51 and an LED 52 that emits light by being supplied with an electric current by being mounted on an electrode (not shown) formed on the mounting surface of the mounting substrate 51. Including.

  The light guide plate 53 is a plate-like member having a side surface 53S, and a top surface 53U and a bottom surface 53B positioned so as to sandwich the side surface 53S. A part of the side surface 53 </ b> S faces the light emitting surface of the LED 52 to receive light from the LED 52. The received light is multiple-reflected inside the light guide plate 53 and is emitted outward from the top surface 53U as planar light.

  The reflection sheet 54 is disposed so as to be covered with the light guide plate 53. Then, one surface of the reflection sheet 54 facing the bottom surface 53B of the light guide plate 53 becomes a reflection surface. For this reason, the reflection surface reflects the light back from the LED 52 and the light propagating through the light guide plate 53 so as to return to the light guide plate 53 (more specifically, through the bottom surface 53B of the light guide plate 53).

  The diffusion sheet 55 is disposed so as to cover the top surface 53U of the light guide plate 53, diffuses the planar light from the light guide plate 53, and spreads the light throughout the liquid crystal display panel 69 (note that this diffusion sheet). 55 and the optical sheets 56 and 57 are collectively referred to as an optical sheet group).

  The optical sheets 56 and 57 are, for example, optical sheets that have a prism shape in the sheet surface and deflect light emission characteristics, and are arranged to cover the diffusion sheet 55. Therefore, the optical sheets 56 and 57 collect the light traveling from the diffusion sheet 55 and improve the luminance. In addition, the divergence direction of each light condensed by the optical sheet 56 and the optical sheet 57 is in a relation of crossing.

  The built-in chassis CS is a rectangular and frame-shaped base body (frame edge) that holds the various members described above. More specifically, the built-in chassis CS holds the reflection sheet 54, the light guide plate 53, the diffusion sheet 55, the optical sheet 56, and the optical sheet 57 while being stacked in this order within the frame. In the following, this stacking direction is defined as an overlapping direction P, the direction along the longitudinal direction of the built-in chassis CS intersecting (for example, orthogonal to) the overlapping direction P is defined as the longitudinal direction Q, and along the short side of the built-in chassis CS. The direction is a short direction R.

  The built-in chassis CS (a part of the backlight unit 59 that is a base member that supports the liquid crystal display panel 69) supports the rectangular liquid crystal display panel 69 on the top surface CSu that is one surface of the frame. In short, one surface of the built-in chassis CS that faces the liquid crystal display panel 69 is the top surface CSu that supports the liquid crystal display panel 69.

  The backlight unit 59 as described above causes the light from the LEDs 52 to be emitted as planar light by the light guide plate 53, and the planar light passes through the optical sheet group to increase the light emission luminance. The light is emitted. Then, the backlight light reaches the liquid crystal display panel 69 supported by the backlight unit 59, whereby the non-light emitting liquid crystal display panel 69 improves the display function.

  In such a liquid crystal display device 79, as shown in FIG. 18, the liquid crystal display panel 69 is bonded to the frame edge of the built-in chassis CS of the backlight unit 59 through a double-sided adhesive layer BR having light shielding properties. The Therefore, a double-sided tape (double-sided adhesive set) 11 including this double-sided adhesive layer BR will be described in detail with reference to FIGS. FIG. 1 is a plan view of the double-sided tape 11. 2 is a cross-sectional view taken along line B-B ′ of FIG. 1, and FIG. 3 is a cross-sectional view taken along line C-C ′ of FIG. 1. FIG. 4 is a cross-sectional view of the double-sided adhesive layer BR.

  As shown in FIGS. 1 to 3, the double-sided tape 11 includes a double-sided adhesive layer (adhesive member, double-sided adhesive member) BR, a first separator layer (release material) SR1, and a second separator layer (release material) SR2. ,including.

  As shown in the cross-sectional view of FIG. 4, the double-sided adhesive layer BR includes a base material BB, a first adhesive layer AR1, and a second adhesive layer AR2 (that is, the double-sided adhesive layer BR has a three-layer structure). The base material BB is a resin such as polyethylene terephthalate (PET), for example. The first adhesive layer AR1 is an adhesive that adheres to one surface of the substrate BB, and the second adhesive layer AR2 is an adhesive that adheres to the other surface of the substrate BB (here, the surface formed by the first adhesive layer AR1 is the first surface). The adhesive surface and the surface formed by the second adhesive layer AR2 are the second adhesive surface).

  The first adhesive layer AR1 and the second adhesive layer AR2 are desirably formed of the same material having the same level of adhesive force. This is because the manufacturing cost of the double-sided adhesive layer BR can be suppressed if it is so.

  However, the present invention is not limited to this, and the first adhesive layer AR1 and the second adhesive layer AR2 which are different materials and have different adhesive strengths may be used {the adhesive strength is 0.05-0. Desirably outside the range of 5 N / mm, for example, the adhesive strength of the first adhesive layer AR1 is 0.75 N / mm (= 15 N / 20 mm width), and the adhesive strength of the second adhesive layer AR2 is 1.0 N / mm (= A numerical example of 20N / 20mm width) is given}.

  Since such a double-sided adhesive layer BR is attached to the top surface CSu (see FIG. 17) of the built-in chassis CS, it has a frame shape similar to that of the built-in chassis CS as shown in FIG. Note that one surface of the double-sided adhesive layer BR facing the top surface CSu of the built-in chassis CS is a second adhesive layer AR2.

  The first separator layer SR1 is a release material that covers the first adhesive layer AR1 to protect the first adhesive layer AR1 and is peeled off from the first adhesive layer AR1 as necessary. Similarly, the second separator layer SR2 is a release material that covers the second adhesive layer AR2 to protect the second adhesive layer AR2 and is peeled off from the second adhesive layer AR2 as necessary (these separators). The material of the layers SR1 and SR2 is not particularly limited, but an example is polyethylene terephthalate).

  In addition, as shown in FIGS. 1-3, one parting line DL is cut | disconnected in 1st separator layer SR1. Then, the first separator layer SR1 can be divided with the dividing line DL as a boundary. That is, the first separator layer SR1 has a split structure and is partially peeled from the first adhesive layer AR1.

  Therefore, for convenience, in the first separator layer SR1, the smaller one of the two pieces is referred to as a small separator piece 12S (divided release material piece) and the larger one as a large separator piece 12L (divided release material piece).

  A handle portion HP is formed on the small separator piece 12S. More specifically, as shown in FIG. 1, the small separator piece 12S includes a rectangular portion that covers one short side portion of the frame-like double-sided adhesive layer BR, and at one end separated from the dividing line DL at the rectangular portion. Includes a piece-like part protruding to the outside. This piece-like portion becomes a handle portion HP (first handle portion).

  The handle portion HP is also formed on the large separator piece 12L. Specifically, the large separator piece 12L is a portion that is not covered by the small separator piece 12S, that is, a rectangular portion that covers the other short side portion, the two long side portions, and the inside of the frame surrounded by these three side portions. including. Further, the large separator piece 12L includes a piece-like portion projecting to the outside at one end separated from the dividing line DL at the rectangular portion. This piece-like portion becomes a handle portion HP (second handle portion).

  The second separator layer SR2 may have the same outer shape as the first separator layer SR1 (that is, the shape of the outer periphery including the adjacent small separator piece 12S and the large separator piece 12L), but there is no dividing line DL.

  Here, a process of bonding (connecting) the liquid crystal display panel 69 and the backlight unit 59 using the double-sided tape 11 as described above will be described with reference to FIGS. 5A to 6E. These drawings are cross-sectional views, and are cross-sections along the line B-B ′ in FIG. 1.

  First, in the double-sided tape 11 as shown in FIG. 5A, as shown in FIG. 5B, the second separator layer SR2 is peeled off. Then, the second adhesive layer AR2 in the double-sided adhesive layer BR is exposed to the outside. The second adhesive layer AR2 is directed to the top surface CSu of the built-in chassis CS in the backlight unit 59 and is placed on the top surface CSu. Then, as shown in FIG. 5C, the double-sided adhesive layer BR adheres to the built-in chassis CS.

  Next, the large separator piece 12L of the first separator layer SR1 is peeled off from the double-sided adhesive layer BR with the double-sided tape 11 attached to the built-in chassis CS. For example, when the handle portion HP of the large separator piece 12L is pulled, the large separator piece 12L is peeled off from the double-sided adhesive layer BR as shown in FIG. 5D (note that the pulling direction of the handle portion HP is double-sided). It is preferable that the angle is about 30 ° with respect to the adhesive layer BR).

  Then, by separating the large separator piece 12L, a part of the first adhesive layer AR1 of the double-sided adhesive layer BR is exposed to the outside. Therefore, the liquid crystal display panel 69 is placed on the first adhesive layer AR1.

  More specifically, as shown in FIG. 6E, the first adhesive is arranged such that one short side is disposed on the first short side part CS1s of the built-in chassis CS at the outer edge of the rectangular back polarizing film 63 in the liquid crystal display panel 69. The other short side is placed on the layer AR1, and the other short side is placed on the small separator piece 12S disposed on the second short part CS2s of the built-in chassis CS (this process is referred to as a temporary bonding process).

  In short, while a part of the liquid crystal display panel 69 and a part of the backlight unit 59 are bonded via the double-sided adhesive layer BR, another part of the liquid crystal display panel 69 and another part of the backlight unit 59 are combined. The double-sided adhesive layer BR is adhered to only one of the parts, and another part of the liquid crystal display panel 69 and another part of the backlight unit 59 are separated.

  In this case, the liquid crystal display panel 69 cannot be attached to all the first adhesive layers AR1 in the double-sided adhesive layer BR at one time (in other words, the liquid crystal display panel 69 can be applied to the entire surface of the first adhesive layer AR1 at once. The display panel 69 cannot be pasted). Furthermore, although one end at the outer edge of the liquid crystal display panel 69 is bonded to the first adhesive layer AR1, the other end is placed on the small separate piece 12S on the first adhesive layer AR1. Then, the liquid crystal display panel 69 is tilted with respect to the backlight unit 59, and a part of the liquid crystal display panel 69 placed on the small separator piece 12S is not fixed to the backlight unit 59.

  Various quality inspection processes are performed in such a state (temporarily fixed state) of the liquid crystal display panel 69. For example, the quality inspection process of the polarizing films 63 and 64 that are a part of the liquid crystal display panel 69 and the quality inspection process of the optical sheet groups 55 to 57 that are a part of the backlight unit 59 are given as examples.

  Then, the small separator piece 12S is peeled from the double-sided adhesive layer BR at the stage where various quality inspection conditions are satisfied, that is, when it is confirmed that the liquid crystal display panel 69 and the backlight unit 59 are good products. For example, when the handle portion HP of the small separator piece 12S is pulled, the small separator piece 12S is peeled off from the double-sided adhesive layer BR. It is preferable that the angle is about 30 ° with respect to the adhesive layer BR).

  Then, the first adhesive layer AR1 of the double-sided adhesive layer BR exposed to the outside and the other short side of the outer edge of the back polarizing film 63 that overlaps the small separator piece 12S are bonded (this process is performed). The final bonding step, and both the temporary bonding step and the final bonding step are collectively referred to as the bonding step). Thereby, the adhesion between the liquid crystal display panel 69 and the backlight unit 59 is completed.

  The liquid crystal display panel 69 is temporarily fixed (dimmed) to the backlight unit 59 until the adhesion between the liquid crystal display panel 69 and the backlight unit 59 is completed. The liquid crystal display panel 69 and the backlight unit 59 in the temporarily fixed state can be easily disassembled. In particular, a part of the liquid crystal display panel 69 on the second short side CS2s side of the built-in chassis CS is not bonded, so it can be easily lifted. As a result, the liquid crystal display panel 69 and the backlight unit 59 can be disassembled. Complete.

  Then, in the quality inspection process included in the manufacturing process of the liquid crystal display device 79, when a member (defective part) that does not satisfy the inspection condition is found, the liquid crystal display panel 69 and the backlight unit 59 in the temporarily fixed state are attached. By separating, only defective parts can be replaced or repaired.

  In addition, when the liquid crystal display panel 69 and the backlight unit 59 are not temporarily fixed but are completely fixed, the liquid crystal display panel 69 and the backlight unit 59 need not be separated for replacement of defective parts. If not, at least one of the two can be damaged. However, when the liquid crystal display panel 69 and the backlight unit 59 are temporarily fixed, the risk of damage to the liquid crystal display panel 69 and the backlight unit 59 can be suppressed due to replacement of defective parts.

  Further, even if dust or the like adheres to the inside of the liquid crystal display device 79 during the manufacturing process of the liquid crystal display device 79, if the liquid crystal display panel 69 and the backlight unit 59 are temporarily fixed, they may be bonded again. (In short, the liquid crystal display device 79 can be reworked). Therefore, the quality of the liquid crystal display device 79 is also improved.

  The peeling force when the liquid crystal display panel 69 and the backlight unit 59 can be temporarily fixed and when they cannot be described in detail. The liquid crystal display that fixes the internal chassis CS and overlaps the second short part CS2s of the internal chassis CS. As numerical examples of the force when pulling up the end of the panel 69, the following results are obtained (note that the peeling force can also be said to be the adhesive force between the liquid crystal display panel 69 and the backlight unit 59). However, the double-sided adhesive layer BR used for obtaining the numerical examples is No. 2 which is a double-sided tape manufactured by Teraoka Seisakusho Co., Ltd. having an adhesive strength of 12 N / 20 mm width or more. 7648 (18 N / 20 mm width).

◆ In the case of temporary fixing ◆ In the case where temporary fixing is not possible Adhesive force → 1363.2g weight 2056.0g weight Peeling force required for the first peeling → 1311.6g weight The liquid crystal display device 79 is broken Peeling force required for the second peeling → 1152 .6 g weight The liquid crystal display device 79 is broken. Peeling force required for the third peeling → 1036.2 g weight The liquid crystal display device 79 is broken The peeling force required for the fourth peeling → 813.8 g weight The liquid crystal display device 79 is broken.

  Incidentally, as shown in FIG. 6E, in the temporary fixing between the liquid crystal display panel 69 and the backlight unit 59, the small separator piece 12S is interposed between the back polarizing film 63 and the double-sided adhesive layer BR. However, the present invention is not limited to this.

  For example, as shown in FIG. 7 (particularly, an enlarged view on the right side of FIG. 7), a small separator piece 12S is interposed between the active matrix substrate 61 and the double-sided adhesive layer BR, so that it is included in the liquid crystal display panel 69. The back polarizing film 63 and the double-sided adhesive layer BR may be separated from each other. However, the thickness of the small separator piece 12S (and hence the first separator layer SR1) must be larger than the thickness of the back polarizing film 63 (for example, if the thickness of the back polarizing film 63 is about 60 μm, the small separator). The thickness of the piece 12S is preferably about 85 μm).

  Because, when the thickness of the small separator piece 12S is thinner than the thickness of the back polarizing film 63, as shown in FIG. 8 (particularly, the enlarged view on the right side of FIG. 8), the active matrix substrate 61 and the double-sided adhesive layer BR This is because even if the small separator piece 12S is interposed therebetween, the small separator piece 12S cannot separate the back polarizing film 63 from the double-sided adhesive layer BR. This is because 12S cannot lift the active matrix substrate 61 and the back polarizing film 63 attached to the active matrix substrate 61 comes into contact with the double-sided adhesive layer BR).

[Embodiment 2]
A second embodiment will be described. In addition, about the member which has the same function as the member used in Embodiment 1, the same code | symbol is attached and the description is abbreviate | omitted.

  The double-sided adhesive layer BR in the double-sided tape 11 has a light shielding property. Therefore, the light that has passed through the optical sheet groups 55 to 57 hardly leaks outside the liquid crystal display panel 69. In addition, the double-sided adhesive layer BR is interposed between the built-in chassis CS, which is a part of the backlight unit 59, and the liquid crystal display panel 69, thereby preventing the liquid crystal display panel 69 from being damaged.

  For example, the double-sided adhesive layer BR prevents the built-in chassis CS and the liquid crystal display panel 69 from violently colliding with each other due to vibration applied to the liquid crystal display device 79, and prevents the liquid crystal display panel 69 from dropping from the built-in chassis CS. Sloppy.

  Therefore, in order to further prevent the liquid crystal display panel 69 from being damaged, as shown in FIG. 9 (particularly, the enlarged view on the left side of FIG. 9), the spacer 16 has the active matrix substrate 61 and the double-sided adhesive layer BR. You may interpose between. In the manufacture of the liquid crystal display device 79 including such a spacer 16, for example, as shown in FIG. 10 (particularly, an enlarged view on the right side of FIG. 10), both surfaces overlapping the second short part CS2s of the built-in chassis CS. It is preferable that the small separator piece 12S on the adhesive layer BR is in contact with the back polarizing film 63 so that the back polarizing film 63 and the double-sided adhesive layer BR are prevented from being bonded (in short, the liquid crystal display panel 69 and It may be temporarily fixed with the backlight unit 59).

  Of course, since the thickness of the small separator piece 12S is larger than the thickness of the back polarizing film 63, the small separator piece 12S is interposed between the active matrix substrate 61 and the double-sided adhesive layer BR, and the back polarizing film 63 and The double-sided adhesive layer BR may be separated (see FIG. 7).

  10 and 6, when the small separator piece 12S is in contact with the back polarizing film 63, the length of the small separator piece 12S overlapping the back polarizing film 63 (that is, the overlapping small separator pieces 12S and 12S) In the back polarizing film 63, the shortest length from the edge of the small separator piece 12S that is substantially parallel to the edge of the back polarizing film 63) is preferably about 0.2 mm. This is because the small separator piece 12 </ b> S is difficult to be visually recognized through the liquid crystal display panel 69 with this length.

  In FIG. 10, the spacer 16 is attached between the first short part CS <b> 1 s of the built-in chassis CS and the active matrix substrate 61. However, the spacer 16 may be attached to another part of the built-in chassis CS. For example, the spacer 16 may be attached between the second short part CS2s of the built-in chassis CS and the active matrix substrate 61.

  Another double-sided tape 21 may be attached to the upper surface of the spacer 16 (one surface of the spacer 16 facing the active matrix substrate 61). For example, as shown in FIG. 11 (particularly, an enlarged view on the right side of FIG. 11), the double-sided adhesive layer BR21 of the double-sided tape 21 is formed between the spacer 16 on the double-sided adhesive layer BR of the double-sided tape 11 and the active matrix substrate 61. It may be interposed between them.

  In the manufacturing process of such a liquid crystal display device 79, as shown in FIG. 12 (particularly, an enlarged view on the right side of FIG. 12), the active matrix substrate 61 is placed on the separator layer SR21 attached on the double-sided adhesive layer BR21. Should be placed. In this case, on the second short side CS2s side of the built-in chassis CS, the back polarizing film 63 is separated from the double-sided adhesive layer BR, and the active matrix substrate 61 is separated from the double-sided adhesive layer BR21.

  That is, the liquid crystal display panel 69 and the backlight unit 59 are temporarily fixed. Therefore, even with such a liquid crystal display device 79, it is easy to replace defective parts, rework, etc. during the manufacturing process.

[Other embodiments]
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the liquid crystal display device 79 described above, the small separator piece 12S is disposed on the second short side CS2s side of the built-in chassis CS. However, the position of the small separator piece 12S (that is, the interposition member that separates the liquid crystal display panel 69 and the backlight unit 59) is not particularly limited.

  For example, the small separator piece 12S may be disposed on the first short side CS1s side of the built-in chassis CS, or may be disposed on a longitudinal portion of the built-in chassis CS. Further, the position and shape of the dividing line DL of the first separator layer SR1 of the double-sided tape 11 are not particularly limited.

  For example, as shown in FIG. 13A, the dividing line DL may be formed so as to bisect the middle in the longitudinal direction of the first separator layer SR1, or as shown in FIG. 13B, the short line of the first separator layer SR1. The dividing line DL may be formed so as to bisect the middle of the hand direction. Further, the dividing line DL is not linear, but may be L-shaped as shown in FIG. 13C. In addition, there may be a plurality of dividing lines DL.

  Moreover, as shown in FIGS. 13A to 13C and FIG. 1, each of the divided first separator layers SR1 (each of the separator pieces 12) includes a handle portion HP. That is, the handle portion HP and the separator piece 12 have an integral structure. However, it is not limited to this. For example, the handle portion HP and the separator piece 12 may have separate structures (for example, the handle portion HP may be attached to the separator piece 12 with a tape that is a separate member).

  The handle portion HP is not essential for each separator piece 12. For example, as shown in FIG. 14A, the handle portion HP may be included only in the small separator piece 12S, or all the separator pieces 12 may not include the handle portion as shown in FIG. 14B. obtain.

  In addition, one handle portion HP and the other handle portion HP of the separated separator piece 12 are arranged to be separated from each other (see FIGS. 13A to 13C). However, as shown in FIG. 12C, the handle portion HP of one separator piece 12 and the handle portion HP of the other separator piece 12 may be adjacent to each other.

  In particular, the handle portion HP of one separator piece 12 and the handle portion HP of the other separator piece 12 may be integrated before the dividing line DL is cut. If it becomes like this, the structure of the process member (for example, the punching die blade KF for press mentioned later) for forming handle part HP will become simple, and the manufacturing cost of double-sided tape 11 will be held down.

  Further, the shape of the double-sided adhesive layer BR included in the double-sided tape 11 is not limited to a frame shape. For example, as shown in FIG. 14B, a frame may be constituted by four linear double-sided adhesive layers BR, or as shown in FIG. 14C, the two linear double-sided adhesive layers BR are separated. However, you may face each other in parallel.

  In short, the double-sided adhesive layer BR adheres a part of the liquid crystal display panel 69 and a part of the backlight unit 59, while another part of the liquid crystal display panel 69 and another part of the backlight unit 59. The shape of the liquid crystal display panel 69 is not particularly limited as long as it can be separated from another part of the liquid crystal display panel 69 and another part of the backlight unit 59.

  There are various ways of manufacturing the double-sided tape 11 including the double-sided adhesive layer BR, the first separator layer SR1, and the second separator layer SR2. For example, the double-sided tape 11 is manufactured through two steps shown in FIGS. 15A and 15B (note that the arrow direction in these drawings means the direction in which the double-sided tape 11 flows).

  In these two steps, as shown in FIG. 15A, first, the double-sided adhesive layer BR wound around the supply roller 82 is stretched and supplied to the first rollers 81 and 81, and is wound around the supply roller 83. The second separator layer SR2 formed is stretched and supplied. Then, the double-sided adhesive layer BR is in close contact with the second separator layer SR2 by the first rollers 81 and 81.

  Next, when the dust-removing adhesive tape 84T supplied from the dust-removing roller 84 touches the double-sided adhesive layer BR, various dusts attached to the double-sided adhesive layer BR (for example, attached to the double-sided adhesive layer BR). The protective film, etc. that have been removed) are recovered. Further, the protective film 85F is supplied from the protective film roller 85 to the double-sided adhesive layer BR from which dust is removed, and is adhered to the double-sided adhesive layer BR.

  Next, the first processing press device PA1 performs pressing so as to punch out the inner frame portion and the like in the double-sided adhesive layer BR. Then, the unnecessary part (debris) is collected by the debris removal unit UT. The scrap removing unit UT includes a supply roller 86 that has wound the adhesive tape 86T for scrap removal, and a collection roller 87 that collects the adhesive tape 86T.

  The residue removing unit UT takes the residue by attaching the adhesive tape 86T to the pressed double-sided adhesive layer BR from the supply roller 86, and collects the residue-attached adhesive tape 86T by the recovery roller 87. . Then, the cleaned double-sided adhesive layer BR and the second separator layer SR2 are wound up by the collection roller 88.

  In addition, although two such scrap removal units UT are used in FIG. 15A, it is not limited to this, One may be sufficient and three or more may be sufficient.

  When the first step shown in FIG. 15A is completed, the second step is performed next. In the second step, first, as shown in FIG. 15B, the double-sided adhesive layer BR and the second separator layer SR2 after the completion of the first step are supplied by the supply roller 91, and further, dust adhered to the double-sided adhesive layer BR. Etc. are recovered. More specifically, when the dust-removing adhesive tape 92T supplied from the dust-removing roller 92 touches the double-sided adhesive layer BR, various types of dust attached to the double-sided adhesive layer BR are collected.

  Next, the first separator layer SR1 wound around the supply roller 93 is stretched and supplied to the double-sided adhesive layer BR (in short, the first separator layer SR1 is not covered with the second separator layer SR2 on the one surface of the double-sided adhesive layer BR). 1 separator layer SR1 is affixed), and then, the second processing press device PA2 performs pressing so as to remove the entire outer shape of the double-sided tape 11.

  Various unnecessary portions generated by the pressing are recovered by the scrap removing adhesive tape 94T supplied from the scrap removing roller 94, and the first separator layer SR1, the double-sided adhesive layer BR, the second The separator layer SR2 (that is, the double-sided tape 11) is wound up by the collection roller 95.

  In the second step shown in FIG. 15B as described above, the dividing line DL included in the first separator layer SR1 is formed by the second working press apparatus PA2. Specifically, as shown in FIG. 16 which is a schematic cross section of the second working press apparatus PA2, a blade KF2 different from the blade KF1 for generating the outer shape of the double-sided tape 11 forms a dividing line DL ( The blades KF1 and KF2 are mounted on the punching die MD).

  More specifically, the blade KF1 for generating the outer shape of the double-sided tape 11 has a length slightly shorter than the combined length of the first separator layer SR1, the double-sided adhesive layer BR, and the second separator layer SR2. (However, the length thereof is longer than the total length of the first separator layer SR1 and the double-sided adhesive layer BR). However, the blade KF2 for forming the dividing line DL is shorter than the blade KF1 and slightly longer than the thickness of the first separator layer SR1.

  With such a blade KF2, only the first separator layer SR1 can be cut as shown in FIG. That is, the blade KF2 does not cut the entire double-sided tape 11, but can cut only the portion of the first separator layer SR1 (such a cut is referred to as a half cut).

  The dividing line DL may not be formed simultaneously with the press for forming the outer shape of the double-sided tape 11. For example, the dividing line may be formed in the first separator layer SR1 after completion of pressing by the second processing press device PA2.

  Moreover, the cross section of the double-sided tape 11 becomes the same cross section irrespective of the way of forming the dividing line DL. In other words, the verification of the double-sided tape 11 including the dividing line DL is not affected by how the dividing line DL is formed.

  In the above description, the liquid crystal display device 79 is described as an example of the display device, but the present invention is not limited to this. For example, a plasma display device, an organic EL (Electro-Luminescence) display device, or the like may be used. In short, any display device may be used as long as various display panels other than the liquid crystal display panel 69 are supported by some base member and the double-sided tape 11 is interposed between the display panel and the base member.

11 Double-sided tape (double-sided adhesive set)
BR Double-sided adhesive layer (adhesive member, double-sided adhesive member)
BB substrate AR1 first adhesive layer (first adhesive surface)
AR2 Second adhesive layer (second adhesive surface)
SR1 First separator layer (peeling material)
12 Separator piece (divided release material piece)
12S small separator piece (divided release material piece)
12L large separator piece (divided release material piece)
DL dividing line HP handle part (first handle part, second handle part)
SR2 Second separator layer (peeling material)
16 Spacer 21 Double-sided tape (Double-sided adhesive set)
BR21 Double-sided adhesive layer (adhesive member, double-sided adhesive member)
SR21 Separator layer (release material)
CS built-in chassis CS1s 1st short part of built-in chassis CS2s 2nd short part of built-in chassis CSu Top face of built-in chassis 59 Backlight unit (base member)
61 Active matrix substrate 62 Counter substrate 63 Back polarizing plate 64 Front polarizing plate 69 Liquid crystal display panel (display panel)
79 Liquid crystal display device (display device)

Claims (9)

In a manufacturing method of a display device including a bonding process in which a display panel that displays an image and a base member that supports the display panel are bonded using an bonding member,
In the bonding step, while part of the display panel and part of the base member are bonded via the adhesive member, another part of the display panel and another part of the base member A method of manufacturing a display device including a temporary bonding step in which another part of the display panel and another part of the base member are separated from each other by bonding the adhesive member only to any one of . The adhesive member is a double-sided adhesive type,
The first adhesive surface which is one adhesive surface in the adhesive member is covered with a release material,
A part of the display panel, a part of the base member, and a first adhesive surface that is exposed when a part of the release material is peeled off, and a second adhesive surface that is a back surface of the first adhesive surface. Is glued,
Claims that another part of the display panel and another part of the base member deviate from each other because the release material remaining on the first adhesive surface is interposed between the display panel and the base member. Item 12. A method for manufacturing a display device according to Item 1. In the bonding process, in addition to the temporary bonding process,
The final adhesion for peeling off the release material remaining on the first adhesive surface and bonding another part of the display panel and another part of the base member between the first adhesive surface and the second adhesive surface. The manufacturing method of the display apparatus of Claim 2 including a process.   A part of the release material peeled off from the first adhesive surface in the temporary adhesion step becomes a handle portion, and a part of the release material peeled off from the first adhesive surface in the final adhesion step, The method for manufacturing a display device according to claim 3, wherein the display device is a handle portion.   A first handle portion is attached to the release material that is peeled off from the first adhesive surface in the temporary adhesion step, and a second handle is attached to the release material that is peeled off from the first adhesive surface in the final adhesion step. The method for manufacturing a display device according to claim 3, wherein the handle portion is attached. In a double-sided adhesive set that bonds a display panel that displays an image and a base member that supports the display panel,
The double-sided adhesive set includes a double-sided adhesive member having both surfaces as adhesive surfaces, and a release material that covers one first adhesive surface of the both surfaces of the double-sided adhesive member,
The release material is a double-sided adhesive set having a split-type structure that can be partially peeled. When each of the release material to be divided and divided release material pieces,
The double-sided adhesive set according to claim 6, wherein a part of each divided release material piece becomes a handle portion. When each of the release material to be divided and divided release material pieces,
The double-sided adhesive set according to claim 6, wherein a handle portion is attached to each divided release material piece.   The display apparatus containing the said display panel and the said base member which were connected by the double-sided connection member of any one of Claims 6-8.

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