CN1786779A - Process method and device for flexible liquid crystal display panel - Google Patents

Abstract

The invention discloses a process method and a device for a flexible liquid crystal display panel, which comprises the steps of arranging a first flexible substrate on a hard carrier, manufacturing an electrode pattern layer on the first flexible substrate, coating an alignment layer on the electrode pattern layer, printing a plurality of micro structures on the alignment layer, precuring the micro structures, forming a liquid crystal layer on the precured micro structures, arranging and controlling to press a second flexible substrate on the precured micro structures, heating and curing the micro structures and stripping the hard carrier to form the flexible liquid crystal display panel. The invention also provides a device manufactured by the manufacturing method of the flexible liquid crystal display panel. The invention can print the viscous rubber material on a soft substrate by using a printing process method, and a device for pressing and adhering the upper substrate and the lower substrate by using an ultraviolet exposure or heating mode, thereby simplifying the process of manufacturing the microstructure.

Description

Process method and device for flexible liquid crystal display panel

technical field

The present invention relates to a process method and device for a flexible liquid crystal display panel, in particular to a method of printing sticky glue on a flexible substrate by means of a printing process method, and making upper and lower substrates by means of ultraviolet exposure or heating Lamination and bonding device.

Background technique

Although the image quality of LCD monitors is affected by the panel spacing (cell gap) in different degrees depending on the matching display mode, overall, controlling the uniformity of the panel spacing is a key factor in the entire LCD production process. A very important technical project. The traditional method is to sprinkle many glass beads or glass fibers with uniform particle size, so-called spacers, between the upper and lower substrates, and then apply pressure and use the frame glue outside the display area to bond the upper and lower substrates. However, when the substrate is replaced by a soft material, the traditional method of sprinkling spacers is not suitable for spacing control of soft material substrates due to the uniformity of the distribution of spacers and the size difference between particles. In addition, when the panel is deflected by an external force, the upper and lower substrates are also easily dislocated and collapsed. In view of this, for the flexible material substrate manufacturing process, it is necessary to find a more effective method, which can support and control the distance between the upper and lower panels, and also needs to have the function of bonding the upper and lower substrates.

Conventionally, there are several methods for controlling the distance between the upper and lower panels and bonding them together. The single-substrate display proposed by Philips uses a phase separation method to form an organic thin film (Phase Separated Composite Organic Film; PSCOF), that is, to use a polymer to wrap liquid crystal molecules on a plastic substrate, and at the same time form a polymeric wall that supports the two substrates ( polymer wall) and adhere to the upper and lower substrates. In addition, US Patent No. 6,672,921 "Manufacturing Process for Electronphoretic Display" proposed by Sipix is a method and device for manufacturing a micro-cup structure (Micro-cup) array.

Please refer to Figure 1, which is a schematic diagram of the manufacturing method of the electrophoretic display. The patent of the manufacturing method of the electrophoretic display is to make a filled electrophoretic display medium, wherein a roller with an appropriate surface structure is used as a master mold when forming a microcup, and when the adhesive material is coated When the substrate passes through the rollers, the glue is hardened and formed into the required microcup structure by heating or irradiating radiation.

Among the conventional technologies mentioned above, the manufacturing process of the stand-alone panel display technology proposed by Philip Company is not easy to control, and the formed polymer structure is not strong enough to block water and gas. Although the method proposed by Sipix has the advantages of being suitable for the roll-to-roll continuous process, fast production speed, and low cost, when it is applied to the liquid crystal display process, it is extremely difficult to form an alignment layer with uniform alignment on the microcup structure. Therefore, this process method is not completely suitable for the production of liquid crystal displays.

In order to solve the shortcomings of the conventional technology, the inventor of the present case proposes a method and device for manufacturing a flexible liquid crystal display panel.

Contents of the invention

The main purpose of the present invention is to propose a method and device for manufacturing a flexible liquid crystal display panel. Using a printing process method, a sticky glue material is printed on a flexible substrate, and the upper and lower substrates are formed by ultraviolet exposure or heating. Pressing and bonding devices to simplify the process of making microstructures.

In order to achieve the above object, the present invention proposes a method for manufacturing a flexible liquid crystal display panel, comprising: making a first flexible substrate; printing a plurality of microstructures on the first flexible substrate; pre-curing the microstructures ; forming a liquid crystal layer between the pre-cured microstructures; arranging and controlling pressing a second flexible substrate on the pre-cured microstructures; and curing the microstructures while adhering the second flexible substrate and peeling off the hard carrier to form the flexible liquid crystal display panel.

The present invention also proposes a device for a flexible liquid crystal display panel, comprising: a first flexible substrate; a plurality of microstructures printed on the first flexible substrate; a liquid crystal layer formed on a plurality of pre-cured Between the micro-structures; and a second flexible substrate, which is set and controlled to be pressed on the pre-cured micro-structures.

The manufacturing method of the flexible liquid crystal display panel proposed by the present invention includes setting a first flexible substrate on a hard carrier, making an electrode pattern layer on the first flexible substrate, and coating an alignment layer on the On the electrode pattern layer, print a plurality of microstructures on the alignment layer, pre-cure the microstructures by ultraviolet exposure or heating, form a liquid crystal layer between the pre-cured microstructures, set and control the lamination of a second The flexible substrate is placed on the pre-cured microstructures, and then the microstructures are cured by ultraviolet radiation or heating, and the second flexible substrate is adhered, and the flexible liquid crystal display panel can be formed after peeling off the hard carrier. Utilizing the present invention, a printing process method can be used to print viscous adhesive material on a flexible substrate, and a device for pressing and adhering the upper and lower substrates through ultraviolet exposure or heating is used to simplify the process of making microstructures.

Description of drawings

1 is a schematic diagram of a conventional manufacturing method of an electrophoretic display;

2A to 2I are schematic diagrams of the manufacturing method of the flexible liquid crystal display panel of the present invention;

Figure 2I is also a schematic diagram of the device of the flexible liquid crystal display panel of the present invention; and

3A to 3D are schematic diagrams of embodiments of printing microstructures.

Explanation of reference numbers:

Photoresist 10 Roller 12 UV 14

Hard carrier 20 First flexible substrate 22 Electrode pattern layer 24

Alignment layer 26 First flexible substrate 28 Microstructure 30

Heating or UV exposure 32 Liquid crystal layer 34 Second flexible substrate 36

Tablet 38 Inkjet Equipment 40 Stencil 42

Detailed ways

In order to make the technology, means and effects that the present invention adopts for achieving the purpose can be further understood, please refer to the following detailed description and accompanying drawings of the present invention, and believe that the purpose, features and characteristics of the present invention can be obtained from this And for specific understanding, however, the accompanying drawings are provided for reference and illustration only, and are not intended to limit the present invention.

The present invention uses a printing process method to print a viscous glue material on a flexible substrate, and performs lamination and adhesion of the upper and lower substrates through ultraviolet exposure and heating, so as to simplify the process of making microstructures.

Please refer to FIG. 2A to FIG. 2G which are schematic diagrams of the manufacturing method of the flexible liquid crystal display panel of the present invention. First make a first flexible substrate 28. On FIG. 2A, set a first flexible substrate 22 on a hard carrier 20. The flexible substrate is a plastic substrate, and the material of the plastic substrate can be poly Ethylene terephthalate (Polyesterurethane; PET), polyethersulfone (PES), heat-resistant transparent resin (Arton), light-curing resin (Acrylic Resin) or thermosetting resin (Epoxy).

Figure 2B, making an electrode pattern layer 24 on the first flexible substrate 22, the electrode pattern material is a conductive film, the conductive film can be an inorganic conductive material such as metal films such as copper, silver, chromium or indium tin oxide (ITO) or organic conductive materials such as polyethylene-dioxithiophene (Polyethylene-dioxithiophene; PEDOT) and the like. FIG. 2C, an alignment layer 26 can be coated on the electrode pattern layer 24, the material of the alignment layer can be polyimide (polyimide), polyamic acid (polyamic acid) or photo-alignment material, this alignment layer is not necessary The structure can be selected according to the display mode and liquid crystal material.

FIG. 2D, printing a plurality of microstructures 30 on a first flexible substrate 28, wherein the first flexible substrate 28 has the flexible substrate 22, the electrode pattern layer 24 and the alignment layer 26, FIG. 2E, using These microstructures are pre-cured by heating or ultraviolet light exposure 32. It is recommended to use ultraviolet light exposure for comparison here. FIG. 2F forms a liquid crystal layer 34 between these pre-cured microstructures 30. FIG. 2G, setting and control Pressing a second flexible substrate 36 onto the pre-cured microstructures 30 , wherein the pressing is controlled by rollers 12 . The second flexible substrate 36 has a flexible substrate 22 and an electrode pattern layer 24, and an alignment layer 26 can be coated on the electrode pattern layer 24, but this is not an essential structure, and can be matched with display modes and liquid crystal materials. trade-offs. The manufacturing method can refer to FIG. 2A to FIG. 2C , and the second flexible substrate 36 can be manufactured after peeling off the hard carrier 20 . Fig. 2H, heating or ultraviolet exposure 32 cures these microstructures 30 and adheres the second flexible substrate 36 on the microstructures 30 at the same time, it is recommended to carry out by heating, Fig. 2I, after peeling off the hard carrier, it can be manufactured into the flexible liquid crystal display panel.

Please refer to FIG. 2I which is also a schematic diagram of the device of the flexible liquid crystal display panel of the present invention, including a first flexible substrate 28, and the first flexible substrate 28 has at least a flexible substrate 22, an electrode pattern layer 24, and An alignment layer 26 may be coated and formed on the electrode pattern layer. A plurality of microstructures 30 are printed on the first flexible substrate 28 , and the plurality of microstructures are formed by contact roller printing, contact plate printing, inkjet printing or screen printing. A liquid crystal layer 34 is formed between the plurality of pre-cured microstructures. A second flexible substrate 36 is set and controlled on the pre-cured microstructures. The pressing is controlled by rollers. The second flexible substrate 36 has a flexible substrate 22 and an electrode pattern layer 24. An alignment layer 26 can be coated on the electrode pattern layer 24, and finally the hard carrier is peeled off to complete the flexible liquid crystal display panel.

Please refer to FIG. 3A to FIG. 3D for schematic diagrams of the implementation of printing microstructures. In FIG. 3A, it is an example of using contact roller printing when making multiple microstructures. (spacer) pattern on the roller 12, and then printed on the flexible substrate 28, the selection of the adhesive material can be mixed with light hardening resin and thermosetting resin to form a bifunctional resin system and mixed with an appropriate amount of hard spacers, If it is considered that the liquid crystal has a mode of attaching polarizers, the adhesive material can be a black light-absorbing material. The pattern (pattern) printed on the flexible substrate not only has a thickness of the adhesive material higher than the panel spacing requirement, but also has a hard gap column to support it. It is pre-solidified before lamination to maintain the height and shape of the pattern and prevent The shoal flow is serious, but it is still viscous and plastic. When pressing, it can be pressed to the required panel spacing and cured.

In FIG. 3B, it is an embodiment of using contact plate printing when making a plurality of microstructures. A uniform adhesive film is covered on a flat plate 38 with a gap column pattern, and then printed on the flexible substrate 28. The choice of adhesive material can be a bifunctional resin system mixed with light-curing resin and thermosetting resin and mixed with an appropriate amount of hard spacers. If considering that the liquid crystal has a polarizer (polarizers) mode, the adhesive material can be black light-absorbing In addition to the thickness of the adhesive material that is higher than the panel spacing requirements, the pattern (pattern) printed on the flexible substrate is also supported by hard gap columns. It is pre-solidified before pressing to maintain the height of the pattern and Shape, to prevent serious beach flow, but still have viscous and plasticity, when pressing later, it can be pressed to the required panel spacing and cured.

In FIG. 3C , it is an embodiment of using inkjet printing when making multiple microstructures. The adhesive material is ejected from the inkjet device 40 to draw the designed gap column pattern, and it is pre-solidified before lamination to maintain the pattern. The height and shape of the panel can prevent serious shoal flow, but it still has viscosity and plasticity. When pressing later, it can be pressed to the required panel spacing and cured.

In Fig. 3D, it is an embodiment of using screen printing when making a plurality of microstructures. After preparing a screen 42 with a pattern of microstructures, the adhesive material is transferred to the flexible substrate 28 by screen printing. After the board, it is pre-cured to maintain the height and shape of the pattern to prevent serious beach flow, but still has viscosity and plasticity. Afterwards, when pressing, it can be pressed to the required panel spacing and cured.

In the above-mentioned embodiment of printing microstructures, when printing them, the polymerization reaction is initiated by light to form a semi-gelatinized film that can support the shape of the interstitial column, and when it is to be assembled and pressed, it is pressed to the required height Then heat-treat the unreacted thermosetting resin to make it stick to the upper and lower panels after thermal polymerization and at the predetermined panel spacing position to achieve the purpose of bonding and supporting. This method not only has the convenience, low pollution and high quality reliability of light-curing resin, but also has the high strength and adhesiveness of thermosetting resin. In addition, the processing method of semi-solid film can avoid the instability during fluid processing , so it has the advantage of mass production.

The present invention uses a printing process method to print a viscous adhesive material on a flexible substrate to form a microstructure. The upper and lower substrates are laminated and adhered by heating or ultraviolet exposure, and the flexible substrate is laminated at the same time. The curing adhesive can achieve the dual functions of adhesion and fixing the distance between panels, so as to simplify the process of making microstructures.

The present invention can clearly provide a design that is completely different from the known ones by means of the technology disclosed above, which can improve the overall use value.

However, the drawings and descriptions disclosed above are only embodiments of the present invention. Those who are skilled in this art can make other various improvements based on the above descriptions, and these changes still belong to the spirit and spirit of the present invention. within the patent scope defined by the claims.

Claims (19)

1. the manufacturing method thereof of a soft liquid crystal display panel comprises:

Make one first flexible base plate;

Most microstructures of printing are on this first flexible base plate;

Those microstructures of precuring;

Form a liquid crystal layer between the microstructure of those precuring;

Be provided with and control pressing one second flexible base plate on the microstructure of those precuring; And

Solidifying those microstructures sticks together this second flexible base plate simultaneously and peels off this hard carrier and form this soft liquid crystal display panel.

2. the manufacturing method thereof of soft liquid crystal display panel as claimed in claim 1, it is characterized in that, this is made in the step of first flexible base plate, one first flexible substrate at first is set on a hard carrier, on this first flexible substrate, make an electrode pattern layer, can on this electrode pattern layer, be coated with a both alignment layers.

3. the manufacturing method thereof of soft liquid crystal display panel as claimed in claim 2, it is characterized in that, this first flexible substrate is a plastic substrate, and the material of this plastic substrate can be polyethylene terephthalate, polyethers Feng, heat-resisting transparent resin, photo-hardening type resin or thermmohardening type resin.

4. the manufacturing method thereof of soft liquid crystal display panel as claimed in claim 2, it is characterized in that, this electrode pattern material is a conducting film, this conducting film is inorganic conductive material or organic conductive material, this inorganic conductive material is copper metal film, silver metal film, chromium metal film or indium tin oxide, and this organic conductive material is tygon-dioxy one sulphur diene 5 surrounds.

5. the manufacturing method thereof of soft liquid crystal display panel as claimed in claim 2 is characterized in that, the material of this both alignment layers is pi, polyamic acid or light alignment materials.

6. the manufacturing method thereof of soft liquid crystal display panel as claimed in claim 1 is characterized in that, this processing procedure mode of printing those microstructures can be the printing of contact roller, the tabular printing of contact, ink jet type printing or wire mark formula mode of printing.

7. the manufacturing method thereof of soft liquid crystal display panel as claimed in claim 6, it is characterized in that, the processing procedure mode of this contact roller printing is that a uniform glue material film is covered on the roller of gapped post pattern, republish to this flexible base plate, the selection of this glue material can be light-hardening resin and thermosetting resin is mixed into the resin system of difunctionality and mixes an amount of hard gap post, and this glue material can be the black light-absorbing material.

8. the manufacturing method thereof of soft liquid crystal display panel as claimed in claim 6 is characterized in that, the processing procedure mode of the tabular printing of this contact is a uniform glue material film to be covered on the flat board of gapped post pattern republish to this flexible base plate.

9. the manufacturing method thereof of soft liquid crystal display panel as claimed in claim 6 is characterized in that, the processing procedure mode of this ink jet type printing is that a glue material is sprayed by an ink gun, and the gap post pattern of design draws.

10. the manufacturing method thereof of soft liquid crystal display panel as claimed in claim 6 is characterized in that, the processing procedure mode of this wire mark formula printing is the web plate that a microstructure pattern is arranged in preparation, utilizes the wire mark mode that the glue material is needed on this flexible base plate.

11. the manufacturing method thereof of soft liquid crystal display panel as claimed in claim 1 is characterized in that, the mode of this precuring is heating or ultraviolet exposure.

12. the manufacturing method thereof of soft liquid crystal display panel as claimed in claim 1, it is characterized in that, the making step of this second flexible base plate is one second flexible substrate to be set on a hard carrier, on this second flexible substrate, make an electrode pattern layer, can on this electrode pattern layer, be coated with a both alignment layers, peel off this hard carrier at last.

13. the manufacturing method thereof of soft liquid crystal display panel as claimed in claim 1, it is characterized in that, in the step of this setting and control pressing one second flexible base plate, those microstructures of concurrently curable printing, fix and stick together upper and lower plates to reach the panel spacing, two plates are not separated when deflection, and the mode of this curing is heating or ultraviolet exposure.

14. the device of a soft liquid crystal display panel comprises:

One first flexible base plate;

A most microstructure are printed on this first flexible base plate;

One liquid crystal layer is formed between the microstructure of most precuring; And

One second flexible base plate is provided with and control is pressed on the microstructure of those precuring.

15. the device of soft liquid crystal display panel as claimed in claim 14 is characterized in that, this first flexible base plate has a flexible substrate and an electrode pattern layer, a both alignment layers can be set on this electrode pattern layer in addition.

16. the device of soft liquid crystal display panel as claimed in claim 14 is characterized in that, this majority microstructure is formed with the printing of contact roller, the tabular printing of contact, ink jet type printing or wire mark formula mode of printing.

17. the device of soft liquid crystal display panel as claimed in claim 14 is characterized in that, this liquid crystal layer is to splash into liquid crystal with ink-jet apparatus to form.

18. the device of soft liquid crystal display panel as claimed in claim 14 is characterized in that, this second flexible base plate has a flexible substrate, an electrode pattern layer and a both alignment layers.

19. the device of soft liquid crystal display panel as claimed in claim 14 is characterized in that, this pressing is to use roller to control.

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