JP2004333788A - Polarizing film manufacturing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polarizing film manufacturing device by which the output adjustment of ink liquid is facilitated and the ink liquid is applied so that it can be prevented from projecting to the outside of a base plate even when a table is rotated. <P>SOLUTION: A columnar doctor 7 is slid in contact with the end of the base plate 6, and a syringe needle-like dispenser 8 is arranged at one corner angle part of the doctor 7. The doctor 7 is connected to a moving means in a direction Y and slides to move or rotates to move along a coating direction. The dispenser 8 is connected to a moving means in a direction X and horizontally moves in a direction orthogonal to the coating direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【００１８】
【発明の効果】
以上説明したように、本発明によれば、インキ液を塗り広げるときに注射針状のディスペンサを移動して基板にインキ液を線状に滴下するので、従来の横長のスリット状のディスペンサでは不可能であった幅方向の出力調整が可能になり、テーブルを回転してもインキ液を基板の外にはみ出さないように塗布できるようになる。
また、横長のスリット状のディスペンサに比較して液を送り出すポンプなどが単純になり、掃除なども簡単になる。
【図面の簡単な説明】
【図１】円柱状のドクターを用いた偏光膜製造装置の概略図である。
【図２】角柱状のドクターを用いた偏光膜製造装置の概略図である。
【図３】基板の設置方向と塗布方向が一致する場合の塗布方法の模式図である。
【図４】基板の設置方向と塗布方向が異なる場合の塗布方法の模式図である。
【図５】基板の隣接２辺からその対向２辺に至る直線距離の説明図である。
【図６】従来の偏光膜製造装置の模式図である。
【符号の説明】
１ 版
２ 版胴
３ ディスペンサ
４ ブレード
５ テーブル
６ 基板
７ ドクター
８ ディスペンサ
ａ 微細溝
ｂ インキ液[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for manufacturing a liquid crystal display, and more particularly to an apparatus for manufacturing a polarizing film to which a technique of forming a polarizing film by applying a dichroic dye ink is used.
[0002]
[Problems to be solved by the invention]
Conventionally, polarizing plates disposed on both sides of a liquid crystal cell have been attached to the outside of the liquid crystal cell that has passed panel inspection using an adhesive.
For this reason, it is necessary to attach a polarizing plate to each of the liquid crystal cells divided by the scriber, and the workability is very poor.
In addition, various measures such as ensuring positioning accuracy and adhesion strength during bonding, preventing bubbles and dust from being mixed, and preventing the generation of static electricity are required, and in the subsequent process, the adhesion between the polarizing plate and the panel is strengthened or remains between the panels. A lot of time and effort has been spent on assembling such as performing autoclave processing to remove air bubbles.
[0003]
In order to solve this problem, the present applicant has developed an ink solution containing a supramolecular complex in a liquid crystal state in which dichroic dyes developed by Optiva of the United States are spontaneously stacked in the form of a stick. We have developed a technology to produce a polarizing film by printing on a plastic substrate, and have applied for it earlier. This technology has made it possible to assemble a liquid crystal cell that does not require the work of attaching a polarizing plate, and has greatly increased the production efficiency of LCDs.
[0004]
FIG. 6 is a schematic view of a polarizing film manufacturing apparatus using this technique.
In the figure, a plate 1 having a large number of fine grooves a along a printing direction is mounted on a plate cylinder 2, ink is dripped from a horizontally long dispenser 3 onto a rotating plate 1 and spread by a blade 4 to spread two colors. The liquid crystal molecules made of the chromatic dye are pushed into the fine grooves a.
At this time, since the blade 4 is held with a slight gap provided without contacting the plate 1, a thin film of the ink liquid is formed on the plate surface.
When the substrate 6 fixed on the table 5 passes directly below the plate cylinder 2, the plate 1 comes into contact with the substrate 6 and a thin film of the ink liquid is transferred and applied from the plate 1 to the substrate 6.
The transferred liquid crystal molecules composed of dichroic dyes are orientated in a certain direction by receiving a shearing force, and the dye molecules are regularly arranged (crystallized) to produce polarization performance.
[0005]
The liquid crystal molecules composed of this dichroic dye can also be oriented by mechanical shearing force when spread with a blade.
Therefore, instead of forming and transferring a thin film of the ink liquid on the plate surface, even if it is applied directly by applying a shearing force with a roller, the liquid crystal molecules are oriented along the application direction, and as a result, the liquid crystal molecules are aligned on the substrate. The dye molecules of the liquid crystal are regularly arranged.
As a result, a polarizing film having desired polarization performance can be easily manufactured.
[0006]
On the other hand, the polarizing film has various directions according to the user's requirements, and it is necessary to orient the liquid crystal dye molecules to the substrate according to each requirement.
For this reason, since the application direction cannot be changed, the table is rotated to apply an angle to the substrate and the application direction.
However, when applying directly by rotating the table, if the ink is applied so as not to protrude outside the substrate, the required amount of liquid differs in the width direction. The adjustment of the liquid output becomes complicated and nearly impossible.
[0007]
Therefore, an object of the present invention is to provide a polarizing film manufacturing apparatus which can easily adjust the output of the ink liquid and can apply the ink liquid so as not to protrude out of the substrate even when the table is rotated. .
[0008]
[Means for Solving the Problems]
In order to achieve such an object, the present invention is configured as follows.
[0009]
That is, the polarizing film manufacturing apparatus of the present invention prepares a polarizing film on the surface of a substrate by spreading an ink liquid containing a supramolecular complex in a liquid crystal state in which dichroic dyes are spontaneously stacked in a stick shape with a doctor. An apparatus in which an injection needle-shaped dispenser is arranged at an end of the substrate, the dispenser is moved in a direction perpendicular to the application direction to drop the ink liquid linearly, and then a doctor is moved in the application direction. The above object is achieved by spreading the ink liquid that has moved and deposited linearly in a plane.
[0010]
Also, when the installation direction of the substrate and the application direction of the ink liquid are different, the polarizing film manufacturing apparatus of the present invention arranges two dispensers and moves the two dispensers separately to move in the application direction. The doctor drops a programmed amount of ink along two adjacent sides of the substrate with which it first contacts.
[0011]
Further, the polarizing film manufacturing apparatus of the present invention is characterized in that the programmed liquid amount is proportional to a linear distance parallel to a coating direction from two adjacent sides of the substrate to two opposite sides thereof.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0013]
1 and 2 show schematic diagrams of a polarizing film manufacturing apparatus embodying the present invention.
In the polarizing film manufacturing apparatus, as shown in FIG. 1, a cylindrical doctor 7 is slid on an end of a substrate 6 and an injection needle-like dispenser 8 is arranged at one corner thereof.
Alternatively, as shown in FIG. 2, a prism-shaped doctor 7 is slid in contact with an end of the substrate 6, and an injection needle-shaped dispenser 8 is arranged at one corner thereof.
The doctor 7 is connected to a Y-direction moving means (not shown) so as to be able to slide or rotate along the application direction.
The dispenser 8 is connected to a moving means (not shown) in the X direction so as to be able to move horizontally in a direction orthogonal to the application direction.
[0014]
The polarizing film manufacturing apparatus embodying the present invention has the above-described configuration. As shown in FIG. 3, when the coating direction P is parallel to the sides AD and BC of the substrate 6, first, the dispenser 8 is moved from the corner B to the corner. A moves to A, and the above-described ink liquid b is dropped along the side BA, and is deposited in a band shape in front of the doctor 7.
Next, the doctor 7 slides on the substrate 6 and moves along the application direction P to spread the ink liquid b deposited on the side BA to form a thin film of the ink liquid b on the surface of the substrate 6.
At this time, a shearing force is applied to the ink liquid b sandwiched between the doctor 7 and the substrate 6 so that the supramolecular complex contained in the ink liquid b is oriented along the application direction P, and is regularly arranged on the substrate 6. I do. As a result, the thin film of the ink liquid b has polarization performance.
When a cylindrical doctor 7 is used, the doctor 7 may be rotated as well as slidably moved.
[0015]
As shown in FIG. 4, when the coating direction P has an angle with the sides AD and BC of the substrate 6, two dispensers 8 are used, and one of the dispensers 8 is moved to the corner B with the movement of the doctor 7 in the coating direction P. From the corner B to the corner A, the ink liquid b is dropped along the side BA, and the other one is moved from the corner B to the corner C diagonally to drop the ink liquid b along the side BC.
At this time, at the same time, the doctor 7 slides on the substrate 6 and moves in the application direction P, spreads the ink liquid b deposited on the sides BA and BC while applying a shearing force, and spreads the ink liquid b on the surface of the substrate 6. To form
[0016]
In the process of applying the ink liquid b, as shown in FIG. 5, the two dispensers 8 are located at intersections E and F between the doctor 7 and the sides BA and BC of the substrate 6, and straight lines extending from the doctors 7 and parallel to the application direction P therefrom. Is controlled by a program to discharge liquid in proportion to the distances EG and FH to points G and H intersecting the sides AD and DC.
Thereby, for example, the liquid amount becomes 0 at the corners A and C, and the ink liquid b can be applied so as not to protrude outside the substrate 6.
[0017]
The distances EG and FH are calculated by the following formulas, where a and b are the lengths of the sides BA and BC, X is the displacement amount of the doctor 7 in the coating direction P, and θ is the angle between the coating direction P and the sides AD and BC. Can be determined by:

[0018]
【The invention's effect】
As described above, according to the present invention, when the ink liquid is spread, the ink needle dispenser is moved to drop the ink liquid linearly on the substrate, which is not possible with the conventional horizontally long slit-shaped dispenser. The output adjustment in the width direction, which was possible, becomes possible, and the ink liquid can be applied so as not to protrude outside the substrate even when the table is rotated.
Further, compared to a horizontally elongated slit-shaped dispenser, a pump or the like for sending a liquid is simplified, and cleaning and the like are also simplified.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a polarizing film manufacturing apparatus using a cylindrical doctor.
FIG. 2 is a schematic view of a polarizing film manufacturing apparatus using a prismatic doctor.
FIG. 3 is a schematic view of a coating method when the installation direction of the substrate and the coating direction coincide.
FIG. 4 is a schematic view of a coating method when a substrate installation direction and a coating direction are different.
FIG. 5 is an explanatory diagram of a linear distance from two adjacent sides of a substrate to two opposite sides thereof.
FIG. 6 is a schematic view of a conventional polarizing film manufacturing apparatus.
[Explanation of symbols]
Reference Signs List 1 plate 2 plate cylinder 3 dispenser 4 blade 5 table 6 substrate 7 doctor 8 dispenser a fine groove b ink liquid

Claims (3)

An apparatus for preparing a polarizing film on the surface of a substrate by spreading an ink liquid containing a supramolecular complex in a liquid crystal state in which dichroic dyes are spontaneously stacked in a stick shape with a doctor,
Disposing a needle-shaped dispenser at the end of the substrate,
Move the dispenser in a direction perpendicular to the application direction to drop the ink liquid linearly,
Next, a doctor moves in the application direction to spread the ink liquid deposited linearly in a planar manner. When the installation direction of the substrate and the application direction of the ink liquid are different,
Arrange the two dispensers,
2. The polarized light according to claim 1, wherein the doctor moves the two units separately and moves in the coating direction, and drops a programmed amount of ink along two adjacent sides of the substrate that first comes into contact. Film production equipment. The programmed fluid volume,
3. The polarizing film manufacturing apparatus according to claim 2, wherein the ratio is proportional to a linear distance parallel to a coating direction from two adjacent sides of the substrate to two opposite sides thereof.

Images