JP2016180895A - Liquid crystal display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display on which a double-sided tape and a liquid crystal panel can be accurately bonded in manually mounting the liquid crystal panel on a support substrate.SOLUTION: There is provided a liquid crystal display comprising a liquid crystal panel 3 and a support substrate 1 supporting the liquid crystal panel 3 via a double-sided tape 2, where the support substrate 1 is provided with first positioning means 5 in contact with the liquid crystal panel 3 and second positioning means 4 in contact with the double-sided tape 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a liquid crystal display device including a liquid crystal panel.

  As described in Patent Document 1, an adhesive material such as a double-sided tape is used for bonding the liquid crystal panel constituting the liquid crystal display device and the support substrate. 4A and 4B are schematic views of a conventional liquid crystal display device, where FIG. 4A is a top view and FIG. 4B is a side view. When the liquid crystal panel 3 is mounted on the support substrate 1, the double-sided tape 2 or an adhesive is disposed on the support substrate 1 and the liquid crystal panel 3 is placed on the support substrate 1 to be bonded. A manufacturing method is adopted in which after the liquid crystal panel 3 is attached, the liquid crystal panel and the circuit pattern are electrically connected by wire bonding or the like, placed in a curing oven, and the adhesive strength of the double-sided tape 2 or adhesive is increased by heat.

  In the conventional technique, when mass-producing liquid crystal display devices, the liquid crystal panel and the support substrate are bonded with an adhesive material such as a double-sided tape by an automatic assembly device or the like. In addition, when an electronic component is attached to the liquid crystal panel with an adhesive tape, for example, the adhesive tape is attached with high positional accuracy using the adhesive tape attaching device of Patent Document 2. FIG. 5 is a conceptual diagram of the pressure-sensitive adhesive tape applying apparatus, and a pressure supply mechanism 7 for supplying the pressure-sensitive adhesive tape 10 with the pressure-sensitive adhesive layer provided on the support tape and a pressure-bonding mechanism 8 for pressing and bonding the pressure-sensitive adhesive tape 10 to the substrate 11. And a tape recovery unit 9 for recovering the support tape of the adhesive tape 10.

JP 2014-157193 A JP 2009-170806 A

  Unlike mass production, when small quantities are produced, double-sided tape and liquid crystal panels are attached by hand rather than by an attaching device. For manual attachment, for example, a double-sided tape or a liquid crystal panel is attached to a predetermined region of the support substrate with tweezers using a printed pattern as a guide. At that time, since there is only a rough guide for the position of attaching the double-sided tape or the liquid crystal panel, the attaching position may be shifted, and a correction work is required. Furthermore, when the double-sided tape or the liquid crystal panel is peeled off with tweezers, the support substrate or the liquid crystal panel may be damaged.

  It is an object of the present invention to provide a liquid crystal display device capable of accurately attaching a double-sided tape and a liquid crystal panel when mounting the liquid crystal panel on a support substrate manually.

  In a liquid crystal display device including a liquid crystal panel and a support substrate that supports the liquid crystal panel via a double-sided tape, a first positioning unit that contacts the liquid crystal panel and a second positioning unit that contacts the double-sided tape are supported by the support substrate. The liquid crystal display device provided in FIG.

  Furthermore, as the second positioning means, a liquid crystal display device is provided in which a plurality of or annular protrusions are provided on the support substrate, and the double-sided tape is in contact with at least a part of the step formed by the protrusions.

  Furthermore, a liquid crystal display device is provided in which the height of the protruding portion provided as the second positioning means is approximately half the thickness of the double-sided tape.

  Alternatively, as the second positioning means, a liquid crystal display device is provided in which a concave portion in which the double-sided tape is accommodated is provided in the support substrate, and the double-sided tape is in contact with at least a part of the step portion formed by the concave portion.

  Furthermore, a liquid crystal display device in which the depth of the recess is about half the thickness of the double-sided tape is provided.

  Further, as the first positioning means, a liquid crystal display device is provided in which a plurality of or annular projecting portions are provided on the support substrate, and the liquid crystal panel is in contact with at least a part of the stepped portion formed by the projecting portions.

  Furthermore, a liquid crystal display device is provided in which the height of the protrusion provided as the first positioning means is lower than the thickness of the liquid crystal panel.

  According to the present invention, it is possible to accurately attach the double-sided tape and the liquid crystal panel to the support substrate at the time of manual work, and correction work becomes unnecessary. By eliminating the need for correction work, damage to the support substrate and the liquid crystal panel during the correction work and the disposal of double-sided tape are reduced, leading to a reduction in work man-hours.

  Furthermore, by making the step of the second positioning means substantially half of the double-sided tape, the double-sided tape can be applied with high accuracy, and contact between the support substrate and the liquid crystal panel can be prevented.

  Moreover, interference with the member attached to a liquid crystal display device can be prevented by making the height of the projection part provided as a 1st positioning means lower than the thickness of a liquid crystal panel.

  According to the present invention, it is possible to provide a liquid crystal display device capable of accurately attaching a double-sided tape and a liquid crystal panel when the liquid crystal panel is manually mounted on a support substrate.

Schematic explaining the assembly process of the liquid crystal display device in 1st embodiment of this invention. 1 is a schematic side view of a liquid crystal display device according to a first embodiment of the present invention. Schematic explaining the assembly process of the liquid crystal display device in 2nd embodiment of this invention. 1 is a schematic configuration diagram of a conventional liquid crystal display device. Schematic of an adhesive tape sticking apparatus. Schematic which shows the modification of the support substrate in this invention.

  Embodiments of the present invention will be described below with reference to the drawings. The liquid crystal panel has a generally known configuration, and a description thereof will be omitted.

  The support substrate 1 according to the first embodiment is a wiring substrate on which a circuit pattern is formed. As shown in FIG. 1A, a protrusion as a first positioning unit is provided on the liquid crystal panel mounting surface of the support substrate 1. 5 and a protrusion 4 as a second positioning means. When the support substrate 1 is a rigid substrate, a flexible substrate, a rigid flexible substrate, or the like, for example, the protrusions 4 and 5 are formed of silicon, ceramic, epoxy resin, or the like.

  The double-sided tape 2 is attached to the support substrate 1 by bringing the double-sided tape 2 picked up by tweezers into contact with the side surface (step portion) of the protruding portion 4 provided as the second positioning means. Paste in position. In the present embodiment, the two corners of the rectangular double-sided tape 2 are brought into contact with the key-shaped protrusion 4 to improve the pasting accuracy.

  Subsequently, as shown in FIG. 1B, the liquid crystal panel 3 is attached to the support substrate 1 to which the double-sided tape 2 is attached. The liquid crystal panel 3 can be attached with high accuracy by being brought into contact with the side surface (stepped portion) of the protruding portion 5 provided as the first positioning means of the support substrate 1. The height of the protrusion 4 provided as the first positioning means is preferably made lower than the thickness of the liquid crystal panel in consideration of thinning of the liquid crystal display device. Further, the height of the protrusion 4 provided as the second positioning means is about half the thickness of the double-sided tape 2, thereby preventing contact between the protrusion 4 and the liquid crystal panel 3 (FIG. 2). reference).

  After affixing the liquid crystal panel 3 to the support substrate 1, using a bonding wire or conductive adhesive, the circuit pattern of the support substrate 1 and the liquid crystal panel 3 are electrically connected, put into a cure oven, and heated The adhesive strength of the double-sided tape 2 or the conductive adhesive is increased, and other optical members (not shown) are incorporated to complete the liquid crystal display device.

  The second embodiment is different from the first embodiment in that the second positioning means is not a protrusion but a recess. Since other configurations are the same, description thereof is omitted.

  On the liquid crystal panel mounting surface of the support substrate 1 of the second embodiment, as shown in FIG. 3, a recess 6 is provided as a second positioning means. The recess 6 is large enough to accommodate the double-sided tape 2 and has a depth approximately half the thickness of the double-sided tape 2. The step of attaching the double-sided tape 2 manually is the same as in the first embodiment in that the double-sided tape 2 is picked up with tweezers, and the double-sided tape 2 is brought into contact with the side surface (stepped portion) of the concave portion 6. Adhere double-sided tape 2. The shape of the recess 6 does not need to be the same as that of the double-sided tape 2, and may be selected as appropriate in consideration of the required accuracy and workability. When a multilayer wiring board is used as the support substrate 1 as a means for forming the recess 6, the recess 6 is formed by providing an opening in the uppermost layer.

  In the first embodiment, the two protrusions 4 and 5 are provided as the first and second positioning means, but the present invention is not limited to this, and as two or more protrusions or an annular protrusion, Also good. Further, the double-sided tape and the liquid crystal panel may have a shape other than a rectangle, for example, a round shape or a triangle shape, and the positioning means for the protrusions and the recesses may have a shape corresponding to each (see FIG. 6).

  In addition, although the wiring board on which the circuit pattern is formed is exemplified as the support board, the invention is not limited to this. For example, the reinforcing member and the FPC board are bonded together, and the reinforcing member has protrusions and recesses. It may be formed, or the opening of the FPC board may be a recess.

DESCRIPTION OF SYMBOLS 1 Support substrate 2 Double-sided tape 3 Liquid crystal panel 4 Protrusion part (2nd positioning means)
5 Projection (first positioning means)
6 Recessed part (second positioning means)
7 Tape supply part 8 Crimping mechanism part 9 Tape recovery part 10 Adhesive tape 11 Substrate

Claims (7)

In a liquid crystal display device comprising a liquid crystal panel and a support substrate that supports the liquid crystal panel via a double-sided tape,
First positioning means in contact with the liquid crystal panel;
2. A liquid crystal display device according to claim 1, wherein a second positioning means that contacts the double-sided tape is provided on the support substrate. As the second positioning means, a plurality of or annular protrusions are provided on the support substrate,
The liquid crystal display device according to claim 1, wherein the double-sided tape is in contact with at least a part of the stepped portion formed by the protruding portion.   3. The liquid crystal display device according to claim 2, wherein the height of the protruding portion is about half of the thickness of the double-sided tape. As the second positioning means, a concave portion in which the double-sided tape is accommodated is provided on the support substrate,
2. The liquid crystal display device according to claim 1, wherein the double-sided tape is in contact with at least a part of a step portion formed by the recess.   5. The liquid crystal display device according to claim 4, wherein the depth of the recess is about half of the thickness of the double-sided tape. As the first positioning means, a plurality of or annular protrusions are provided on the support substrate,
The liquid crystal display device according to claim 1, wherein the liquid crystal panel is in contact with at least a part of a stepped portion formed by the protruding portion. The liquid crystal display device according to claim 6, wherein a height of the protruding portion is lower than a thickness of the liquid crystal panel.

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