JPH04315127A - Holding structure of liquid crystal display device - Google Patents

Abstract

PURPOSE:To provide the holding structure of the liquid crystal display device which can hold the liquid crystal display device while surely preventing the generation of warpage, etc., in the device and can improve the display performance and reliability of the liquid crystal display device. CONSTITUTION:This holding structure for the liquid crystal display device holds the liquid crystal display device having a rectangular flexible substrate 11 having at least >=1 insertion holes 11c in the respective positions at four corners by means of holding members having projecting parts adapted to be inserted into the insertion holes 11c and pulls the flexible substrate 11 outward in diagonal line directions. Reinforcing members 15 enclosing the insertion holes are provided on the above-mentioned flexible substrate 11 and the projecting parts are inserted into the insertion holes 11c via these reinforcing members 15.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a holding structure for a liquid crystal display device, and more particularly, the present invention relates to a holding structure for a liquid crystal display device, and more specifically, a liquid crystal display device that can be held in a high temperature and high humidity environment without causing warping of a flexible substrate. Regarding the holding structure.

0002

2. Description of the Related Art Conventionally, there is a holding structure for a liquid crystal display device of this type as shown in FIG. 4, for example. In FIG. 4(a), 1 is a liquid crystal display device, and this device 1 is made of a polymer film or the like, and a liquid crystal is sealed inside.
A transparent insulating film substrate 2 is sealed and has a transparent electrode for driving a liquid crystal on its inner peripheral surface, and a known upper polarizing film 3 and a lower polarizing film 4 are attached to the upper and lower outer peripheral surfaces of this film substrate 2. It is composed of.

This film substrate 2 is composed of a pair of substrates 2a and 2b that are pasted together.In order to form a semiconductor film or a gate insulating film, etc., which will become an active element on the inner surface of the film substrate 2, the film substrate 2 is held by a holding device. It is formed through a process of setting the film substrate 2 in a heat treatment furnace and heat-treating it in a heat treatment furnace.For example, in order to prevent warping etc. from occurring when the film substrate 2 is heat-treated, an insertion hole is formed in the outer periphery of the film substrate 2. By inserting a protruding member provided at the top of the holding device into this insertion hole, the holding device is suspended vertically from the top of the holding device to prevent warping due to its own weight. The method is JP-A-1-
248127 and JP-A-2-33122).

A holding member 5 is attached to the upper part of the upper polarizing film 4 as shown in FIG. 4(b), and the upper polarizing film 4 is fixed to this holding member 5 with a double-sided tape 6 interposed therebetween. This holding member 5 is made of an aluminum plate having a thickness of about 0.5 mm, and has a plurality of insertion holes 5a on its outer periphery, into which screws (not shown) or the like are screwed. It is attached to the display panel of a copying machine, etc. Therefore, the liquid crystal display device 1 is held by the holding member 5 and held by a display panel or the like.

[0005]

[Problems to be Solved by the Invention] However, in such a conventional holding structure for a liquid crystal display device, the liquid crystal display device 1 is held on the holding member 5 by a member with weak adhesive strength such as double-sided tape 6. Therefore, even if the film substrate 2 is prevented from warping or the like when the film substrate 2 is heat-treated, after the liquid crystal is sealed in the film substrate 2 and the upper and lower polarizing films 3 and 4 are attached, the holding member 5 and unitized, the film substrate 2
etc. It has warped.

That is, in a high-temperature, high-humidity environment, the film substrate 2 and the upper and lower polarizing films 3 and 4 have different expansion and contraction rates in the axial direction, and the rigidity of these film substrates 2 and the like is low. Large warpage, distortion, etc. have occurred in 1. Even when the environment is returned to normal temperature and normal humidity, these warping and the like are not eliminated, resulting in a problem that the display performance and reliability of the liquid crystal display device 1 deteriorate.

[0007] Accordingly, the invention according to claims 1 to 3 can reliably prevent and maintain the liquid crystal display device from warping, etc., and can improve the display performance and reliability of the liquid crystal display device. The purpose of the present invention is to provide a holding structure for a liquid crystal display device that can be used.

[0008]

[Means for solving the problem] The invention according to claim 1 includes:
In order to achieve the above object, a liquid crystal display device is provided with a rectangular flexible substrate having at least one insertion hole at each of four corners, and a liquid crystal display device having a protrusion that can be inserted into the insertion hole. A holding structure for a liquid crystal display device in which the flexible substrate is held by a holding member and pulled outward in a diagonal direction, wherein the flexible substrate is provided with a reinforcing member surrounding an insertion hole, and the reinforcing member is It is characterized in that the projection is inserted into the insertion hole through the insertion hole.

[0009] In order to achieve the above object, the invention as set forth in claim 2 is characterized in that the reinforcing member is made of the same material as the flexible substrate, and the outer peripheral surface of the reinforcing member is attached to the holding member and the flexible substrate, respectively. It is characterized by being glued. In order to achieve the above object, the invention according to claim 3 is characterized in that the reinforcing member is made of a metal material, and the outer peripheral surface of the reinforcing member is bonded to the holding member and the flexible substrate, respectively.

0010

According to the first aspect of the invention, the flexible substrate is provided with a reinforcing member surrounding the insertion hole, and the protrusion is inserted into the insertion hole through the reinforcing member. Therefore, the flexible substrate is held by the holding member in a state in which it is uniformly pulled diagonally outward. Further, even if the flexible substrate is pulled diagonally outward, the portion of the substrate near the insertion hole will not deteriorate or be damaged, and the tensile force will be stably applied. As a result, even in a high temperature and high humidity environment, the flexible substrate does not warp or the like and is stably held by the holding member, so that the display performance and reliability of the liquid crystal display device do not deteriorate.

In the second aspect of the invention, the reinforcing member is made of the same material as the flexible substrate, and the outer peripheral surface of the reinforcing member is adhered to the holding member and the flexible substrate, respectively. Therefore, the weight of the liquid crystal display device is reduced. In the third aspect of the invention, the reinforcing member is made of a metal material, and the outer peripheral surface of the reinforcing member is bonded to the holding member and the flexible substrate, respectively. Therefore, the rigidity of the flexible substrate in the vicinity of the insertion hole is increased, and the vicinity of the insertion hole is even less likely to deteriorate.

0012

EXAMPLES The present invention will be explained below based on examples. FIG. 1 is a diagram showing a first embodiment of a holding structure for a liquid crystal display device according to claims 1 to 3 of the invention. First, the configuration will be explained. In FIG. 1, reference numeral 11 is a rectangular transparent insulating film substrate made of a flexible material such as PET (polyethylene terephthalate) or PES (polyether sulfone).
It consists of a pair of substrates 11a and 11b that are sealed and have transparent electrodes for driving liquid crystal on their inner peripheral surfaces. An upper polarizing film 12 and a lower polarizing film 13, which constitute a part of the flexible substrate and have a smaller area than the film substrate 11, are fixed to the upper and lower outer peripheral surfaces of this substrate 11,
These upper and lower polarizing films 12 and 13 are made of an acetate resin material, and together with the film substrate 11 constitute a liquid crystal display device 14.

Insertion holes 11c are formed at four corners of the upper and lower outer peripheral surfaces of the film substrate 11, and insertion holes 11c are formed at these four corners.
One surface of a plurality of reinforcing members 15 made of the same material as the film substrate 11 is bonded with epoxy resin, acrylic resin, or the like so as to surround 1c. A protrusion of a holding member (not shown) is inserted into the insertion hole 11ac, and the holding member 1 bonded to the upper polarizing film 12 side is inserted into the insertion hole 11ac.
The other surface of 5 is adhered to this holding member with the resin described above. For this reason, the film substrate 11 is held by the holding member in such a manner that it is pulled diagonally outward by inserting the projection of the holding member into the insertion hole 11c via the reinforcing member 15.

In this embodiment having such a configuration, the insertion holes 11c are formed at the four corners of the film substrate 11, and the reinforcing member 15 is bonded to the portion surrounding the insertion holes 11c. By inserting the projection of the holding member through the reinforcing member 15, the film substrate 11 can be uniformly pulled diagonally outward. Moreover, even if the tensile force is continued to be applied, the film substrate 11 is
can be prevented from deteriorating and being damaged.

For this reason, when the liquid crystal device device 14 is held by a holding member and attached to a display panel of a copying machine or the like, even if it is placed in a high temperature and high humidity environment, the film substrate 11, upper and lower polarizing films 12, 13 will not be affected. Warpage, distortion, etc. can be prevented from occurring, and the display performance and reliability of the liquid crystal display device 14 can be improved. Furthermore, in this embodiment, since the reinforcing member 15 is made of the same flexible material as the film substrate 11, the weight of the liquid crystal display device 14 can be reduced. In this embodiment, the reinforcing member 15 is made of the same material as the film substrate 11, but the reinforcing member 15 is not limited to this, and may be made of a metal material such as aluminum. In this way, the rigidity near the insertion hole 11c can be improved, and deterioration of the film substrate 11 can be further suppressed.

FIG. 2 is a diagram showing a second embodiment of the holding structure for a liquid crystal display device according to the invention as claimed in claims 1 to 3. In this embodiment, insertion holes are provided at the four corners of the upper and lower polarizing films. An example is shown below. Note that, in this embodiment, the same components as those in the first embodiment are given the same numbers and their explanations are omitted. In FIG. 2, lower polarizing films 21 and 22, which constitute a liquid crystal display device 20 together with the film substrate 11 and have a larger area than the film substrate 11, are fixed to the upper and lower outer peripheral surfaces of a transparent insulating film substrate 11. A plurality of insertion holes 21a, 2 are provided at the four corners of the upper and lower polarizing films 21, 22.
2a is formed.

The upper and lower polarizing films 21 and 22 near the insertion holes 21a and 22a are provided with reinforcing members 23 and 24 made of acetate material, which is the same material as the films 21 and 22.
is glued on one side. In addition, the insertion holes 21a, 2
A protruding member of a holding member is inserted into 2a, and the other surface of the reinforcing member 23 is adhered to the holding member. Even in this embodiment, the reinforcing member 23 is inserted into the insertion holes 21a and 22a.
By inserting the protrusion of the holding member through the holding member 24, the upper and lower polarizing films 21 and 22 can be uniformly pulled diagonally outward, and the same effect as in the first embodiment can be obtained. Note that even in this embodiment, the reinforcing member 23,
24 is made of the same material as the upper and lower polarizing film substrates 21 and 22, but is not limited to this and may be made of a metal material such as aluminum. In this way, the same effects as in the first embodiment can be obtained. In addition, in this embodiment, the insertion holes 21a and 2 are provided in the upper and lower polarizing films 21 and 22.
Although the insertion hole 21a is formed in the above example, the insertion hole 21a may be formed only in the upper polarizing film 21 facing the holding member.

FIG. 3 is a diagram showing a third embodiment of the holding structure for a liquid crystal display device according to the invention as claimed in claims 1 to 3. In this embodiment, as shown in FIG.
, forming the upper and lower polarizing films 31 and 32 in the same shape,
These film substrates 30, upper and lower polarizing films 31, 3
An example is shown in which insertion holes 33 are provided at the four corners of 2. In addition,
Since the basic structure of this embodiment is the same as that of the first embodiment, explanations of only the points that are different from the first embodiment will be omitted. Figure 3
, upper and lower polarizing films 31 near the insertion hole 33,
32 has a plurality of reinforcing members 3 surrounding the insertion hole 33.
The reinforcing member 34 is made of the same acetate resin material as the upper and lower polarizing films 31 and 32.

In this embodiment, the reinforcing member 34 is inserted into the insertion hole 33.
By inserting the protrusion of the holding member through the holding member, the film substrate 30 and the upper and lower polarizing films 31 and 32 can be uniformly pulled outward in the diagonal direction, and in addition to the same effect as the first embodiment, It is possible to obtain the effect that the substrate 30 and the like can be pulled diagonally outward with a stronger pulling force. In this embodiment as well, the reinforcing member 34 is made of the same material as the upper and lower polarizing film substrates 31 and 32, but is not limited to this and may be made of a metal material such as aluminum. In this way, the same effects as in the first embodiment can be obtained. Further, in this embodiment, the insertion holes 33 are formed at the four corners of the upper and lower polarizing films 31 and 32, but the insertion holes 33 may be formed only in the upper polarizing film 31 facing the holding member.

[0020]

According to the first aspect of the invention, a reinforcing member is provided on the flexible substrate so as to surround the insertion hole, and the protrusion is inserted into the insertion hole through the reinforcing member. ,
The flexible substrate can be held by the holding member by being pulled diagonally outward. Further, even if the flexible substrate is pulled diagonally outward, the portion of the substrate near the insertion hole can be prevented from deteriorating and being damaged, and a tensile force can be stably applied. As a result, even in high temperature and high humidity environments, the flexible substrate can be prevented from warping and can be stably held by the holding member, improving the display performance and reliability of the liquid crystal display device. can do.

According to the second aspect of the invention, the reinforcing member is made of the same material as the flexible substrate, and the outer peripheral surfaces of the reinforcing member are bonded to the holding member and the flexible substrate, respectively, so that the liquid crystal The weight of the display device can be reduced. Claim 3
According to the described invention, the reinforcing member is made of a metal material,
Since the outer peripheral surface of the reinforcing member is bonded to the holding member and the flexible substrate, the rigidity of the flexible substrate near the insertion hole can be increased, and deterioration of the flexible substrate portion near the insertion hole can be prevented. This can be further suppressed.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a first embodiment of a holding structure for a liquid crystal display device according to the invention as claimed in claims 1 to 3, in which (a) is a partially cross-sectional view of the configuration, and (b) is a holding structure; It is a top view of a member.

FIG. 2 is a diagram showing a second embodiment of a holding structure for a liquid crystal display device according to the invention as claimed in claims 1 to 3, in which (a) is a partially cross-sectional view of the configuration, and (b) is a holding structure; It is a top view of a member.

3A and 3B are diagrams showing a third embodiment of a holding structure for a liquid crystal display device according to the invention according to claims 1 to 3, in which (a) is a partially cross-sectional view of the configuration, and (b) is a holding structure; It is a top view of a member.

FIG. 4 is a diagram illustrating a conventional holding structure for a liquid crystal display device, in which (a) is a partially cross-sectional view of the configuration thereof, and (b) is a top view of the holding member.

[Explanation of symbols]

11, 30 Transparent insulating film substrate (flexible substrate) 11c, 21a, 22a, 33 Insertion hole 12,
21, 31 Upper polarizing film (flexible substrate) 13
, 22, 32 Lower polarizing film (flexible substrate) 1
4,20 Liquid crystal display device

Claims (3)

[Claims] Claims: 1. A liquid crystal display device comprising a rectangular flexible substrate having at least one insertion hole at each of four corners, using a holding member having a protrusion that can be inserted into the insertion hole. A holding structure for a liquid crystal display device configured to hold and pull the flexible substrate diagonally outward, wherein the flexible substrate is provided with a reinforcing member surrounding an insertion hole, and the flexible substrate is inserted through the reinforcing member. A holding structure for a liquid crystal display device, characterized in that a protrusion is inserted into a hole. 2. The liquid crystal display according to claim 1, wherein the reinforcing member is made of the same material as the flexible substrate, and the outer peripheral surface of the reinforcing member is adhered to the holding member and the flexible substrate, respectively. Retaining structure for the device. 3. The holding structure for a liquid crystal display device according to claim 1, wherein the reinforcing member is made of a metal material, and the outer peripheral surface of the reinforcing member is adhered to the holding member and the flexible substrate, respectively.