KR20080073253A - Manufacturing method for micro pixel liquid crystal pannel - Google Patents

Abstract

A method for manufacturing a micro pixel LCD(Liquid Crystal Display) panel is provided to harden a sealant and a micro-pixel mixture simultaneously, thereby decreasing the number of process steps. Transparent electrodes are deposited on an upper substrate and a lower substrate respectively by sputtering(S310). The upper and lower substrates are formed of polymer plastics. A thermal process is performed on the upper and lower substrates in order to prevent thermal deformation of the upper and lower substrates(S320). After the thermal process, the transparent electrodes are pattern-etched through a photolithographic process(S330). Spacers are sprayed on the upper substrate and sealant is coated on the lower substrate(S340). The upper substrate and the lower substrate are bound to each other to form a semi-panel(S350). A micro-pixel mixture is injected into the semi-panel(S360). A UV treatment or heat treatment is performed on the semi-panel to harden hardenable polymers included in the micro pixel mixture and the sealant(S370). The resultant semi-panel is cut to prepare a plurality of LCD panels(S380).

Description

Manufacturing method for micro pixel liquid crystal panel

The present invention relates to a liquid crystal display using a plastic substrate, and more particularly, after injecting a micro pixel mixture into a semi-panel, the micro-capable to simultaneously cure the curable polymer included in the microsilane and the tsilane applied to the semi-panel. A method for manufacturing a pixel liquid crystal panel.

1 is an electrophoretic method using an E-ink microcapsule to display an image by applying an electric field to tens of thousands of micro sized capsules (30 to 70 μm). In 3), positively charged white particles 5 and negatively charged black particles 6 are dispersed in the transparent liquid 4. For example, when an electric field is applied to the microcapsules 3 between the transparent electrodes 1 and 2, the white particles are positively charged in the direction of the negatively applied electrode according to the principle that attractive force acts between different polarities. (5) is collected and negatively charged black particles (6) are collected in the direction of the positively applied electrode. On this principle, if the contrast 7 is formed and represented as a character or an image through the transparent electrode 1, this can be visually confirmed. However, the gap of the microcapsules 3 requires a high driving voltage of 30 to 70 V to move the particles in the capsule due to a relatively large gap of 30 to 70 μm, and has a disadvantage in that the response speed is slow. .

The driving method of the SiPix microcup shown in FIG. 2 is the same electrophoretic method as the E-ink company, and the width 16 is 60-180 μm, the thickness 17 is 5-30 μm and the height 18. After embossing a cup shape having a size of 15 to 40 μm on the substrate, and injecting a solution 14 containing particles charged with one type of charge and a dye 14, the upper and lower electrodes This is a method of driving by applying a voltage at (10,11).

In order to prevent the leakage of solution and particles containing dye inside each cup, there is an encapsulation layer 13 on the top of the cup, and an adhesive layer between the encapsulation layer 13 and the upper electrode for attachment to the upper electrode 10. 12) There is. However, although the height of the cup is smaller than the gap of the microcapsules, it is lower than the driving voltage of the microcapsule, but has a characteristic of a relatively high driving voltage of 10 to 55V and a slow response speed.

The conventional technologies have a wide viewing angle, an ultra-thin film, an ultra-light weight, a low consumption voltage, and a bend in a manner of displaying an image while the charged particles move by the voltage applied from the outside, but the full color is difficult, and the driving IC is applied. The biggest problem is that it is difficult to implement a high speed video due to the slow response speed due to the limitation in composition and the time required for separation and movement of charged particles according to an externally applied voltage. .

In addition, a conventional LCD manufacturing method forms a seal line on the outer edge of a lower substrate (glass or plastic film) and drives a liquid crystal filled therein to form a single LC cell structure. Doing.

However, when the flexible liquid crystal panel is manufactured with the above structure, it is difficult to maintain a uniform cell gap, and particularly, it is easy to lose its characteristics as a display due to excessive bending or slight impact, and to make a pixel during the manufacturing process or during use. If a defect occurs, the entire panel has to be disposed of. In addition, since the liquid crystal injection (or liquid crystal discharging) process is a batch method in a single liquid crystal cell, a continuous process using roll to roll is impossible.

Accordingly, in order to overcome this problem, a liquid crystal micro cell having a predetermined gap is formed on a liquid crystal used in a flexible liquid crystal display by coating with a UV curable polymer or a thermosetting polymer, and then, the liquid crystal micro cell is formed into a panel. To the display. However, such a conventional process method does not take advantage of the flexible LCD by forming a semi-LCD cell, and then injecting liquid crystal into the cell to perform the process used for the glass LCD as it is. can not do it.

For this reason, the conventional process has the drawback that the process for hardening the curable polymer of each component is performed separately or repeatedly.

Therefore, when the process is complicated and the curable polymer included in the panel is not completely cured, a stress is generated in the silane and the gap between the upper and lower substrates is opened or the substrate is opened.

The present invention can reduce the steps of the process by using a curable polymer in which the micropixel mixture is used as the material of the tsilane used for bonding the upper and lower substrates, and simultaneously curing the silane and the micropixel mixture. An object of the present invention is to provide a method of manufacturing a micro pixel liquid crystal panel.

The object of the present invention comprises the steps of patterning a transparent electrode on the upper substrate and the lower substrate; Spraying a spacer on the upper substrate and applying tsilane on the lower substrate; Attaching the upper substrate and the lower substrate to each other to form a semi-panel; Cutting the semi-panel to form a plurality of semi-panels; Injecting a micro pixel mixture into the semi-panel; And forming a micro pixel liquid crystal panel by curing the curable polymer included in the micro pixel mixture and the tsilane.

Another object of the present invention is to pattern a transparent electrode on the upper substrate and the lower substrate; Spraying a spacer on the upper substrate and applying tsilane on the lower substrate; Attaching the upper substrate and the lower substrate to each other to form a semi-panel; Injecting a micropixel mixture into the semipanel; Curing the curable polymer included in the micropixel mixture and the silane to form a micropixel liquid crystal panel; And cutting the plurality of micro pixel liquid crystal panels.

Accordingly, the present invention has a remarkable and advantageous effect of reducing the steps of the process by simultaneously curing the silane and the curing of the micropixel mixture.

The terms or words used in this specification and claims are not to be construed as being limited to their ordinary or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best describe their invention. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a process flowchart of the micropixel liquid crystal panel according to the first embodiment of the present invention.

First, the transparent electrode is deposited on the upper and lower substrates by sputtering (S310). The upper and lower substrates are made of polymer plastic.

Since the plastic is weak in heat, it is heat-treated to prevent thermal deformation of the upper and lower substrates of the plastic material even at a high temperature applied in the baking process included in the photolithography process during the post process (S320).

When the heat treatment is completed, the transparent electrode is patterned by using a photolithography process (S330).

Next, the spacer is sprayed on the upper substrate and tsilane is applied to the lower substrate (S340).

The spacer according to the present invention uses a spherical or columnar polymer and serves to maintain the upper and lower substrates at regular intervals. The material of tsilane is applied using a UV-curable or heat-curable polymer except where the micro liquid crystal mixture is injected.

Next, the upper panel and the lower substrate on which the spacer and tsilane are formed are attached to each other to form a semi-panel (S350).

After forming the injection hole and the discharge port in the semi-panel, the micro pixel mixture is injected (S360).

In preparing the micropixel mixture according to the present invention, the viscosity and concentration of the curable polymer are important variables. The viscosity of the curable polymer should be equal to or lower than the viscosity of the liquid crystal.

The viscosity of the curable polymer and the liquid crystal used in the present invention is 1 to 1000 cps, respectively.

When the curable polymer having an appropriate viscosity is mixed with the liquid crystal, the curable polymer surrounds the surface of the liquid crystal, whereby a micro-sized liquid crystal cell is formed. The curable polymer surrounding the liquid crystal naturally forms walls while forming a boundary with the polymer of the adjacent microcell. The concentration of the curable polymer affects the wall thickness of the independent cell. For example, the lower the concentration, the narrower the wall thickness of the cell. In the process of mixing the liquid crystal and the curable polymer, heat treatment may be performed according to viscosity.

According to one embodiment of the invention, the micro pixel mixture may be injected into a semi-panel with heat treatment. The heat treatment is then done according to the viscosity of the micro pixel mixture. If the viscosity of the micropixel mixture is too high, preheating is performed for smooth injection, and if the viscosity of the micropixels is adequate, no preheating is performed. However, pre-heating may be performed for smooth injection. At the time of liquid crystal injection, the pre-heat treatment temperature is 25 to 80 ° C.

When the micropixel mixture is injected into the semi-panel, UV or heat treatment is performed to cure the curable polymer included in the tsilane and the micropixel mixture (S370).

In the case of UV-curable polymers, UV radiation is cured by energy of 10 mJ to 1000 J, and in the case of thermosetting polymers, curing is performed by applying a temperature of 23 ° C to 120 ° C.

When the micro pixel mixture is injected into the semi-panel, the micro pixel liquid crystal panel is completed by heat treatment at a temperature of 23 ° C. to 180 ° C.

The micro pixel liquid crystal panel thus formed is cut to form a plurality of liquid crystal panels.

Finally, a polarizer (transparent plate, reflector plate or semi-transparent plate) is attached to the surface of the liquid crystal panel, and a tab is connected to allow voltage to be applied to the transparent electrode. Finally, by connecting the drive driver, the micro pixel liquid crystal display device is completed.

4 is a process flowchart of a liquid crystal micropixel display device according to a second exemplary embodiment of the present invention.

The second embodiment is the same until the process (S310 to S350) for forming the semi-panel described in the first embodiment.

The semi-panel is cut to form a plurality of semi-panels (S410). An injection hole and an outlet are formed in the plurality of cut semi-panels to inject the micro pixel mixture (S420).

Next, UV or heat treatment to cure the curable polymer contained in the mixture of the silane and the micro pixel (S430).

Finally, after heat treatment of the thus formed micro-pixel liquid crystal panel, a polarizer (transparent plate, reflector plate or semi-transparent plate) is attached to the panel surface and the tabs are connected to allow voltage to be applied to the transparent electrode. Finally, by connecting the drive driver, the micro pixel liquid crystal display device is completed.

According to another aspect of the present invention, there is provided a method of manufacturing a micropixel liquid crystal labeling device, by introducing a micropixel mixture into an independent semi-panel described above by applying a liquid crystal dropping method (ODF) to attach a microsilane and a spacer. Before the micropanel mixture may be injected into the above-described semi-panel. The subsequent process performs the same method as the above-described embodiment.

Although the present invention has been shown and described with reference to the preferred embodiments as described above, it is not limited to the above embodiments and those skilled in the art without departing from the spirit of the present invention. Various changes and modifications will be possible.

1 is a principle of operation of a microcapsule used in a conventional electronic paper,

2 is a principle of operation of a micro cup used in a conventional electronic paper,

3 is a process flowchart of a micropixel liquid crystal panel according to a first embodiment of the present invention;

4 is a process flowchart of a micropixel liquid crystal panel according to a second embodiment of the present invention.

Claims (9)

Patterning transparent electrodes on the upper substrate and the lower substrate; Spraying a spacer on the upper substrate and applying tsilane on the lower substrate; Attaching the upper substrate and the lower substrate to each other to form a semi-panel; Cutting the semi-panel to form a plurality of semi-panels; Injecting a micropixel mixture into the semipanel; And Curing the curable polymer included in the micropixel mixture and tsilane to form a micropixel liquid crystal panel; Method of manufacturing a micro pixel liquid crystal panel comprising a. Patterning transparent electrodes on the upper substrate and the lower substrate; Spraying a spacer on the upper substrate and applying tsilane on the lower substrate; Attaching the upper substrate and the lower substrate to each other to form a semi-panel; Injecting a micropixel mixture into the semipanel; Curing the curable polymer included in the micropixel mixture and the tsilane to form a micropixel liquid crystal panel; And Cutting the plurality of micropixel liquid crystal panels Method of manufacturing a micro pixel liquid crystal panel comprising a. The method according to claim 1 or 2, Injecting the micro-pixel mixture in the semi-panel, Pre-heat treatment to the curable polymer at a temperature of 23 ℃ to 80 ℃ manufacturing method of a micro pixel liquid crystal panel. The method according to claim 1 or 2, The viscosity of the curable polymer and the liquid crystal is a manufacturing method of a micro pixel liquid crystal panel of 1 to 1000 cps, respectively. The method of claim 1, wherein the injecting the micropixel mixture into the semi-panel is applied by dropping method (ODF). The method according to claim 1 or 2, The curable polymer is a method of manufacturing a micro pixel liquid crystal panel which is cured by UV or heat treatment. The method of claim 6, The energy of the UV is 10mJ to 1000J manufacturing method of a micro pixel liquid crystal panel. The method of claim 6, The UV is a method of manufacturing a micro pixel liquid crystal panel irradiated from the front or both sides of the semi-panel. The method of claim 6, The heat treatment is a manufacturing method of a micro pixel liquid crystal panel is carried out at 23 ℃ to 180 ℃.

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