JP3973887B2 - Manufacturing method of liquid crystal display element - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of manufacturing a liquid crystal display element having a reinforcing material disposition area and a reinforcing material disposition unnecessary area in an electrode terminal portion on a transparent substrate constituting the liquid crystal display element.
[0002]
[Prior art]
Conventionally, a liquid crystal display device is known as a kind of display device that displays various images such as characters and figures, and a liquid crystal is sealed between a pair of transparent substrates as a display unit of such a liquid crystal display device. A liquid crystal display element is used.
[0003]
In the conventional liquid crystal display element 1, as shown in FIG. 4, a pair of transparent substrates 2 made of glass, plastic, or the like are arranged facing each other, and indium oxide is formed on the surfaces facing each other of these transparent substrates 2. A transparent electrode 3 made of tin (hereinafter referred to as “ITO”) or the like is laminated. Further, on the surface of the substrate 2 on which the transparent electrode 3 is formed, a polymer material such as polyimide whose surface is rubbed in order to arrange liquid crystal molecules in a certain form between the transparent electrodes 3 facing each other. An alignment film 4 made of is formed. The two substrates 2 subjected to such an alignment treatment are held at a distance of about several μm by a spacer (not shown). Further, the two substrates 2 are bonded together by a sealing material 5 that also serves as an adhesive, and liquid crystal is injected from an injection port (not shown) provided in advance, and then the injection port is sealed, so that two sheets are sealed. A liquid crystal is sealed between the substrates 2.
[0004]
In the conventional electrode terminal structure of the liquid crystal display element 1, for example, one substrate 2 of a pair of substrates 2 formed by injecting and sealing a liquid crystal between a pair of substrates 2 is connected to the other substrate 2. On the other hand, the surface of the projecting portion of one of the large substrates 2 on the other substrate 2 side is an electrode terminal portion 2a.
[0005]
For example, a liquid crystal driving driver IC (driving circuit) 6 is mounted on the electrode terminal portion 2a. The IC electrode terminal 6a on the output side of the driver IC 6 for driving the liquid crystal is electrically connected to a number of output wirings 8 having a predetermined pattern drawn from the transparent electrode 3 serving as a display electrode located on the liquid crystal display unit 7. Yes. The electrode terminal portion 3a is formed with a large number of input wirings 9 in a predetermined pattern and external connection terminals 10 connected thereto, and the IC electrode terminal 6b on the input side of the liquid crystal driving driver IC 6 is connected to the input wiring. 9 is electrically connected. A panel electrode terminal 11 is formed by the output wiring 8, the input wiring 9 and the external connection terminal 10.
[0006]
A pin connector 12 is connected to the external connection terminal 10.
[0007]
The signal and power sent from the pin connector 12 are input to the liquid crystal drive driver IC 6 via the input wiring 9, and the signal from the liquid crystal drive driver IC 6 is sent to the liquid crystal display unit 7 via the output wiring 8. Thus, a desired image is displayed.
[0008]
By the way, a portion of the electrode terminal portion 2a where electrical connection is made, such as a portion where the liquid crystal driving driver IC 6 or the like is mounted or a connection portion with the pin connector 12 (hereinafter simply referred to as a “connection portion”). As shown in FIGS. 3 and 5, the surface coating is performed using an ultraviolet curable acrylic resin (hereinafter referred to as “UV resin”) 14 as a reinforcing material. It is configured to ensure stability by adopting a structure.
[0009]
[Problems to be solved by the invention]
Here, the UV resin 14 as the reinforcing material is formed in a liquid state having fluidity in an uncured state, and is cured (solidified) by heating or the like after being applied to the surface of the region to be protected. Has been made. And since the UV resin 14 used as a reinforcing material has a low viscosity and is rich in fluidity, the UV resin 14 flows and spreads little by little after applying the UV resin 14 and solidifies, and does not require a coating of the reinforcing material. In some cases, the region reaches the region 15 on the transparent substrate 2 (hereinafter referred to as a region where the reinforcing material is not required; the hatched portion in FIG. 5).
[0010]
The reinforcing material dispensation unnecessary region 15 is originally an area that is gripped by a gripping member (not shown) or the like when a product number is engraved or the liquid crystal display element 1 is mounted on a unit (not shown). When the UV resin 14 adheres, the result of engraving may not be obtained satisfactorily or the gripping operation may be difficult. Furthermore, as shown in FIG. 5, since the UV resin 14 flows and moves, a region 16 on the transparent substrate 2 and the transparent electrode 3 (hereinafter referred to as a reinforcing material disposition region) that requires coating of the reinforcing material. In some cases, an uncoated portion may occur, and the bonding site may not be protected.
[0011]
The present invention has been made in view of these points, and provides a method for manufacturing a liquid crystal display element capable of completely preventing a reinforcing material from being disposed even in a region where a reinforcing material is not required. It is intended to be offered as a product.
[0012]
[Means for Solving the Problems]
To achieve the above object, a manufacturing method of the liquid crystal display device of the present invention, the upper layer of the stiffener before the manufacturing step of coating the arrangement region of the reinforcement, a transparent electrode formed on a transparent substrate In the step of forming the alignment film, the reinforcing material of the contact preventing member made of a resin material that eliminates the coating of the reinforcing material by wettability, which is a material of the alignment film constituting the liquid crystal display element Turkey over bets against the distribution設不main area also and performing simultaneously.
[0013]
According to the method for manufacturing a liquid crystal display element of the present invention, the surface of the region is covered with the contact prevention member disposed in the region where the reinforcing material is not required, so that the coating of the reinforcing material can be reliably performed. Can be prevented. Further, by using a resin material that impedes wettability in relation to the reinforcing material as the contact preventing member, the resin material can be repelled by the resin material, and the reinforcing material is coated on the region. Can be prevented. Further, there is no need for a special device for coating the contact prevention member, and there is no particular increase in the manufacturing process of the liquid crystal display element, and the electrode terminal portion on the transparent substrate constituting the liquid crystal display element is reinforced. A region where the material is surface-coated and a region where the material is not coated can be clearly defined.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Reference embodiments and embodiments of a method for manufacturing a liquid crystal display element of the present invention will be described with reference to FIGS.
[0019]
In addition, description is abbreviate | omitted about the part same as the said prior art example, and the same code | symbol is used.
[0020]
Oite the reference embodiment of the present invention, the reinforcing material distribution設不main region 15, as shown in FIG. 1, coated with a silicone resin 17a serving as the contact preventing member 17, masking the surface.
[0021]
Then, as shown in FIG. 2, the reinforcing material disposition region 16 is coated using UV resin 14 as a reinforcing material. The UV resin 14 is applied to the reinforcing material disposition region using a dispenser so as to have a thickness of about 1 mm, and then solidified by ultraviolet irradiation using a high-pressure mercury lamp.
[0022]
Then, the silicone resin 17a is removed after the UV resin 14 is solidified.
[0023]
As a result, as shown in FIG. 3, a reinforcing material arrangement region 16 whose surface is coated with a reinforcing material is provided on the electrode terminal portion 2 a on the transparent substrate 2 constituting the liquid crystal display element 1, and a reinforcing material that is not applied is provided. The unnecessary region 15 can be clearly partitioned.
[0024]
Therefore, according to the method for manufacturing a liquid crystal display element of the present embodiment, the flow of the UV resin 14 can be blocked by the silicone resin 17a masked in the reinforcing material dispensation unnecessary region 15, and the reinforcing material arrangement can be performed. It is possible to prevent an uncoated portion from occurring in the installation area 16. Further, since the silicone material used as the contact preventing member 17 has a low affinity with the acrylic UV resin used as the reinforcing material, by selecting a material having a weak adhesive force with the transparent substrate 2, Removal of the UV resin 14 after solidification can be easily performed. Further, since the UV resin 14 is not coated in the reinforcing material disposition unnecessary region 15, the product number and the like can be engraved and gripped when mounted on the unit without any trouble.
[0025]
In the reference embodiment , the silicone resin 17a is removed after the UV resin 14 is solidified. However, the silicone resin 17a may be removed if the thickness does not hinder gripping during mounting on the unit. In addition to the silicone resin, a resin having a small surface energy such as a fluorine resin may be used.
[0026]
Subsequently, in the implementation of the invention, as the contact prevention member 17, a resin material which can be expelled by contacting the wettability to the reinforcing material distribution設不main region 16 of the UV resin 14 as the reinforcing material Is used to coat the reinforcing material dispensation unnecessary region 15.
[0027]
Specifically, in this embodiment, as the contact preventing member 17, a transparent electrode 3 formed on the transparent substrate 2 using a material of the alignment film 4 constituting the liquid crystal display element 1 (hereinafter referred to as an alignment film material). In the step of forming the alignment film 4 on the upper layer, the contact preventing material 17 is also coated at the same time.
[0028]
More specifically, in the basic manufacturing process of the liquid crystal display element 1, for the transparent substrate 2 constituting the liquid crystal display element 1, the transparent electrode 3 made of indium tin oxide (ITO) or the like on the substrate 2 and the electric After patterning the signal input terminal pattern into a predetermined shape, the alignment film material is applied and baked, and a rubbing process is performed to form the alignment film 4. As the alignment film material, a resin material such as polyimide that can eliminate contact of the UV resin 14 to the reinforcing material disposition unnecessary region 15 by wettability can be used. Then, when the alignment film 4 is formed using this polyimide or the like, the alignment film material is also applied to the reinforcing material disposition unnecessary region 15 and fired.
[0029]
Then, as shown in FIG. 2, the reinforcing material disposition region 16 is coated using a UV resin 14 as a reinforcing material. The UV resin 14 is applied to the reinforcing material disposition region using a dispenser so as to have a thickness of about 1 mm, and then solidified by ultraviolet irradiation using a high-pressure mercury lamp.
[0030]
At this time, the reinforcing material disposition unnecessary region 15 is made of a resin material such as polyimide, which can eliminate adhesion of the UV resin 14 to the reinforcing material disposition unnecessary region 15 due to wettability as described above. Since it is coated, the UV resin 14 that is about to enter the reinforcing material disapproval region 15 can be repelled and removed by this alignment film material.
[0031]
As a result, as shown in FIG. 3, the reinforcing material arrangement region 16 in which the UV resin 14 is surface-coated on the electrode terminal portion 3 on the transparent substrate 2 constituting the liquid crystal display element 1, and the reinforcing material not provided. The unnecessary region 15 can be clearly partitioned.
[0032]
Therefore, according to the manufacturing method of the liquid crystal display element of the present embodiment, the contact of the UV resin 14 can be prevented by the alignment film material formed in the reinforcing material disposition unnecessary region 15, and the product number and the like are imprinted. In addition, gripping when mounted on the liquid crystal display unit can be performed without any trouble. Further, according to the method for manufacturing a liquid crystal display element of the present embodiment, a separate device is not required unlike the conventional example, and the manufacturing process is not increased.
[0033]
In addition, this invention is not limited to embodiment mentioned above, A various change is possible as needed. For example, the reinforcing material and the contact preventing member are not limited to the materials used in the above-described examples, and a thermosetting silicone resin can be used as the reinforcing material and a fluorine resin can be used as the contact preventing agent. .
[0034]
【The invention's effect】
As described above, according to the present invention, the contact preventing member disposed in the region where the reinforcing material is not required can reliably prevent the reinforcing material from entering and attaching to the region , without requiring a special apparatus for coating a contact touch preventing member, also not be particularly increasing the number of manufacturing steps of the liquid crystal display device, the electrode terminal on the transparent substrate constituting the liquid crystal display element, the reinforcement member Can be formed by clearly partitioning the surface-coated region and the non-surface-coated region.
[0035]
Thus, the method for manufacturing a liquid crystal display element of the present invention is a method for manufacturing a liquid crystal display element that can completely prevent the reinforcing material from being disposed in a region where the surface coating with the reinforcing material is not planned. There exists an effect that it can be made cheap and efficient.
[Brief description of the drawings]
[1] by the production method of the liquid crystal display device of Reference Embodiment of the present plan view showing one step of a method for manufacturing a liquid crystal display device of the invention FIG. 2 is a plan view showing one step of FIG. 1 FIG. 3 the invention FIG. 4 is a cross-sectional view of a main part of a liquid crystal display element. FIG. 5 is a plan view showing problems in a conventional method for manufacturing a liquid crystal display element.
DESCRIPTION OF SYMBOLS 1 Liquid crystal display element 2 Transparent substrate 2a Electrode terminal part 3 Transparent electrode 4 Alignment film 5 Sealing material 6 Driver IC for liquid crystal drive
6a IC electrode terminal 6b IC electrode terminal 7 Liquid crystal display unit 8 Output wiring 9 Input wiring 10 External connection terminal 11 Panel electrode terminal 12 Pin connector 14 Reinforcing material (UV resin)
15 Reinforcing material disposition unnecessary region 16 Reinforcing material disposition region 17 Contact prevention member 17a Silicone resin

Claims (1)

In the method for manufacturing a liquid crystal display element, the electrode terminal portion on the transparent substrate constituting the liquid crystal display element is partitioned and formed with a reinforcing material disposition area and a disposition unnecessary area on the surface thereof.
In the step of forming the alignment film on the upper layer of the transparent electrode formed on the transparent substrate before the manufacturing step of coating the reinforcing material on the region where the reinforcing material is disposed, the alignment film constituting the liquid crystal display element is formed. LCD said reinforcing member a material and carrying out the the contact prevention member formed of a resin material rejecting the wettability that, Turkey over bets against the distribution設不main area of the reinforcing material is simultaneously coated A method for manufacturing a display element.

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