TWI417608B - A liquid crystal panel manufacturing method, a liquid crystal adhesive used in the method, and a liquid crystal panel structure - Google Patents

Description

Liquid crystal panel manufacturing method, liquid crystal glue used in the method, and liquid crystal panel structure

A liquid crystal panel, in particular, a liquid crystal panel manufacturing method in which a liquid crystal adhesive is coated and covered with a peelable film, a liquid crystal paste used in the method, and a liquid crystal panel structure.

According to the research of liquid crystal display, the liquid crystal display has the advantages of low operating voltage, low power consumption, thin shape and light weight, but it is limited by the viewing angle and insufficient brightness in practical use. Therefore, some manufacturers have developed cholesteric liquid crystals combined with different pitches to produce liquid crystal displays. Since cholesteric liquid crystal molecules have a spiral arrangement, they produce optical properties such as optical rotation, selective light scattering, and circular dichroism. This specific optical property is applied to liquid crystal displays, which can improve the shortcomings of today's liquid crystal displays, such as poor brightness and temperature rise due to absorption of light.

The general cholesterol liquid crystal display utilizes the characteristics of memory and optical bistable state of the cholesteric liquid crystal, and is particularly suitable for a display device in which the update frequency of the display image is not high, and the image display needs to be maintained for a long time, for example, for example. Electronic products such as e-books, electronic billboards, and personal digital assistants do not require a polarizing film and a filter. At the same time, the cholesterol liquid crystal display is reflective, can be read directly by using an ambient light source, and has high brightness even under the outdoor sun. The picture is also very clear, no need to add backlight module, the overall reduction of the liquid crystal display production cost of more than 30%, more suitable for outdoor large electronic billboards; therefore, many related technologies of cholesterol liquid crystal display will be born.

The "Polymerization-encapsulated cholesteric liquid crystal for bistable reflective displays" of the U.S. Patent Publication No. 7,351,506, which is directed to the display and control of liquid crystal droplets for polymer-dispersed liquid crystals. The method comprises at least one carrier, a liquid crystal dispersion disposed on the carrier, and a dispersion in a multiple configuration, wherein the liquid crystal dispersion comprises at least one non-polymeric liquid crystal material, a polymerization monomer of the mixture and a polymerization initiator, including polymerization in the polymerization monomer. One or more groups and their size, is the aggregate definition of the functional units controlled by each domain , fx is the number of aggregated a bodies, Mx is the mass fraction of the dispersed material, and n is the total number of dispersed polymerized monomers.

In the "Liquid Crystal Display" of the U.S. Patent Publication No. 7,235,151, a flexible liquid crystal display provides one of the addressable liquid crystal layers to be processed on a flexible substrate so that the display itself will exhibit softness. Preferably, the substrate is a soft, non-transparent material, more preferably a material suitable for suspension, such as a textile. This patent mainly provides cholesterol liquid crystal which can be set on materials such as fabrics. Although the cholesterol liquid crystal material itself has good light transmittance and light reflectivity, it is provided when it is placed on a material having high softness and softness such as cloth. The influence of itself causes a decrease in light transmittance and light reflectivity.

A color cholesteric liquid crystal display device and manufacturing method for the same is provided in the U.S. Patent Publication No. 20070109476. The utility model comprises a bottom substrate; a bottom substrate formed on the electrode layer; a counter electrode layer of the ultraviolet curing coating; and an ultraviolet curing coating formed on the exposed area, and an exposed area on the ultraviolet coating layer, the plurality of exposed sub-areas The concentrate provides a corresponding exposure to a color cholesteric liquid crystal panel. However, the cholesteric liquid crystal material used in this patent does not use an optically active substance, and therefore, in actual use, there is no way to achieve good reflectivity.

US Patent Publication No. 20090081359, "COATABLE CONDUCTIVE LAYER", which comprises a substrate; a fluid-coated conductive material which can be formed by a patternable coatable conductive layer, the fluid coating containing The electrically conductive material that changes the state of light has a state in which the first and second exchanged lights are stabilized; an imaging layer, including a lightly conditioned substance, is symmetrically disposed, at least with a liquid-coated conductive layer. The invention further relates to a method of making a coatable conductive layer and method for making a coatable conductive layer. However, the patent is applied to a new conductive layer directly after coating the cholesteric liquid crystal liquid (ie, the fluid-coated conductive material). Therefore, the cholesteric liquid crystal liquid is easily exposed to dust or particles in the latter stage process, and The overall thickness is thick and cannot effectively reduce the thickness.

Further, the above-mentioned cholesteric liquid crystal material is mixed with the ultraviolet curable gel, and after ultraviolet curing, the liquid crystal molecules inside thereof are not uniformly and completely aligned, resulting in a decrease in refractive index.

In view of the above needs, the inventors have carefully studied and accumulated many years of experience in the business, and finally designed a new "liquid crystal panel manufacturing method, liquid crystal glue used in the method, and the liquid crystal panel structure".

An object of the present invention is to provide a method of manufacturing a liquid crystal panel which can reduce the weight of a liquid crystal panel.

An object of the present invention is to provide a method of manufacturing a liquid crystal panel having a double-sided alignment.

In order to achieve the above object, in the "liquid crystal panel manufacturing method" of the present invention, a liquid crystal material is mixed with a liquid crystal material to form a liquid crystal adhesive, and the ultraviolet curable adhesive used in the liquid crystal adhesive is mainly added to a gel resin. A photoinitiator is prepared, whereby the liquid crystal molecules are separated by ultraviolet exposure to form microcellularized liquid crystals, and the liquid crystal molecules will have a more periodic arrangement and be uniformly distributed throughout the liquid crystal glue.

Applying the liquid crystal glue to the surface of a flexible conductive substrate, and then covering the surface of the liquid crystal adhesive with a peelable film, the liquid crystal adhesive can be made flat by pressing, rolling, etc., while in the latter stage process, The liquid crystal glue does not adhere to dust and the like in the air; furthermore, after the liquid crystal glue is cured, the peelable film is removed, and the double-sided alignment function can be directly achieved.

When the liquid crystal panel is manufactured by the above method, it is mainly a single-sided design. After the peelable film is separated, a single substrate component can be directly covered on the other flexible conductive substrate, and a liquid crystal display can be generated when the electrical signal is transmitted. The image is either directly subjected to a composite multilayer structure after the separation of the peelable film. Since the liquid crystal panel is directly aligned by the peelable film, after the peelable film is removed and the multilayer structure process is performed, the thickness of the liquid crystal panel produced by the liquid crystal panel is reduced in the thickness of the substrate in the substrate alignment, and is actually used. The path of light passing through the flexible conductive substrate is shorter, which can improve the utilization rate of light and increase the light transmittance.

In addition, when the liquid crystal panel is designed on both sides, the liquid crystal glue is applied to the top surface and the bottom surface of the liquid crystal panel, respectively, and then covered with the same flexible conductive substrate, and double-sided display can be generated when the electrical signal is transmitted. Liquid crystal image; it should be noted that when the liquid crystal panel is disposed on the double-sided structure, the process of each side of the liquid crystal panel can be performed according to the above manufacturing method, and can be performed after one side is finished, or both sides are simultaneously performed. .

It is an object of the present invention to provide a liquid crystal glue which facilitates the formation of micelles.

In order to achieve the above object, the present invention provides a "liquid crystal adhesive" which is mixed with a liquid crystal material and a UV curable adhesive for coating on a flexible conductive substrate.

It is an object of the present invention to provide a liquid crystal panel structure having a double-sided display.

In order to achieve the above object, the present invention provides a "liquid crystal panel structure" having a first flexible conductive substrate, wherein a top surface and a bottom surface are respectively provided with a first flexible conductive substrate, wherein the first flexible conductive substrate and the first flexible conductive substrate A liquid crystal glue is disposed between the second flexible conductive substrate, and the liquid crystal glue is formed by mixing a liquid crystal material and an ultraviolet curing glue.

In order for your review board to have a clear understanding of the contents of the present invention, please refer to the following description.

Please refer to FIG. 1 to FIG. 5 for a flow chart and a flow chart according to a preferred embodiment of the present invention. The "liquid crystal panel manufacturing method" is performed according to the following steps: (100) providing a liquid crystal The material is mixed with a UV-curable adhesive to form a liquid crystal glue; when the above steps are performed, the liquid crystal glue 11 is prepared by mixing a liquid crystal material with a UV-curable adhesive, the liquid crystal material is mainly a nematic liquid crystal to which an optical filter is added, or a liquid crystal is added. The nematic liquid crystal of the molecule, after the addition of the optically active agent to the nematic liquid crystal, the liquid crystal material generates a spiral structure to form an optically active nematic liquid crystal. When the liquid crystal is placed in two horizontal substrates, the liquid crystal tends to be arranged in a plane spiral shape without applying an electric field alignment, and the light having the color can be reflected under the reflection of a specific light wavelength, or Is rendered transparent. When the liquid crystal glue 11 is separated by ultraviolet exposure to form a microcellular liquid crystal, the liquid crystal molecules will have a more periodic arrangement, and can be evenly distributed throughout the liquid crystal glue to achieve a high refractive index and a wavelength covered by the reflected light. A wide range of features.

The UV curable adhesive contains a photoinitiator; it should be noted that the preferred ratio of the UV curable adhesive can be 10% to 30% of acrylated dendrimer oligomer, 70%. ~90% monofunctional monomer (monomer) mixed with a small amount of photoinitiator, or 10% to 30% of acrylated dendrimer oligomer, 10% to 30% of two a functional group monomer, 50% to 70% of a monofunctional monomer, a small amount of a photoinitiator and a small amount of a surface tension controlling agent, and the above-mentioned surface tension controlling agent is preferred. Embodiments may be oxiranes or fluorine-containing surface tension control agents.

And the above-mentioned acrylated dendrimer oligomer may be selected from one of a trifunctional oligomer to a ninth functional oligomer, and is not limited thereto. Which is an acrylated dendrimer oligomer, wherein the preferred embodiment is a dendritic hexafunctional oligomer or a ninyl functional oligomer.

(101) providing a flexible conductive substrate; when the above steps are performed, the flexible conductive substrate 10 is made of a transparent ITO soft material or a conductive material is added to a plastic material, wherein the conductive material is high. The molecular material is one of a group consisting of an aromatic linear conjugated conductive polymer composed of poly Aniline or an aromatic heterocyclic linear polymer composed of Poly Pyrrole.

(102) coating the liquid crystal glue on the flexible conductive substrate; (103) covering the surface of the liquid crystal adhesive with a peelable film for performing a back-end process.

When the above steps are performed, the liquid crystal glue 11 is applied to the flexible conductive substrate 10 by spraying or the like, thereby eliminating the need for a vacuum injection method, thereby improving the processing speed and reducing the manufacturing cost, and at the same time, using a usable knife. Coating by means of wire rods, etc., will facilitate the introduction of the roll to roll process, thereby increasing the production capacity of the product, and facilitating the mass production of the large liquid crystal panel 1. Then, the surface of the liquid crystal adhesive 11 is covered with a peelable film 12, and after the covering of the peelable film 12 is completed, the liquid crystal adhesive 11 can be made flat by pressing, rolling, or the like, and at the same time in the latter stage process. The liquid crystal glue 10 does not adhere to dust or the like in the air.

After the liquid crystal panel 1 is cured by light curing, the peelable film 12 is removed to form a single substrate component, and the composite multilayer structure process can be directly performed. Please refer to FIG. After the component, the other flexible conductive substrate 10 is directly covered to form a combination of two layers of single liquid crystal, and when the electrical signal is transmitted, an image of the liquid crystal display can be generated.

The liquid crystal panel 1 manufactured by the above method has the following characteristics:

1. Using a peelable release film to provide an interface to increase product applicability and variability; since the flexible conductive substrate 10 is coated with the liquid crystal adhesive 11, the peelable film 12 is directly covered for alignment and curing. Therefore, in addition to preventing dust and the like from adhering to the liquid crystal glue 11 during production, the peelable film can be directly aligned with the liquid crystal glue 11, thereby saving material and improving the processing speed. The purpose of modern industrial environmental protection and energy conservation.

2. Since the liquid crystal panel 1 is processed directly on the flexible conductive substrate 10 of a single layer, and does not need to be aligned by the double substrate, the light weight is thinner than the conventional dual substrate, and can conform to the thinness of the new generation electronic products. Further, according to the reduction in the thickness of the liquid crystal panel 1, the path through which the light passes in the liquid crystal panel 1 is shortened, the light utilization rate can be improved, and the light transmittance of the substrate can be improved.

In order to better understand the effect of the detachable film 12 in the present case, please refer to the "8A to 8C" for the enlarged view of the conventional dual-substrate alignment and the enlarged view of the single-substrate alignment. The enlarged view of the alignment with the preferred embodiment of the present invention, after being cured by liquid crystal glue, has a distinct liquid crystal phase on the single substrate in FIG. 8B, and the polymer is not polymerized into a spherical shape. The liquid crystal body is not coated, and the effect of the package is not achieved. The main reason is that there is less alignment of the interface, resulting in incomplete phase separation (this paragraph will be discussed again), this phenomenon will affect the substrate after driving. Photoelectric properties. After the double substrate of Fig. 8A and the single substrate of Fig. 8C are combined with the peelable film, it is clearly observed that the polymer is polymerized into a spherical shape, and the liquid crystal particles in the figure are uniform in size and closely arranged to show the polymer. (polymer) has been polymerized to achieve complete phase separation; in addition, the phase separation phenomena shown in Figs. 8A and 8C are very similar, and it can be known that the peelable film provides a substrate-like alignment interface to promote polymerization. The polymer and the liquid crystal phase are separated. Therefore, we can use the peelable film to achieve the phase separation phenomenon of the double substrate, and after the removable film is removed, the substrate can be lightened.

Referring to FIG. 6 , a schematic view of another preferred embodiment of the present invention is shown. As shown in the figure, the liquid crystal panel 1 is formed by using a thin conductive thin conductive substrate 10 in another single layer. A side baffle 13 is disposed on the side of the flexible conductive substrate 10 to form a recessed region therein, and then the liquid crystal adhesive 11 is applied to the flexible conductive substrate 10 by spraying or the like. The peelable film (not shown) covers the surface of the flexible conductive substrate 10, and can check whether the liquid crystal adhesive 11 is uniformly covered, or whether there is a bubble or the like, and finally the peelable film is removed. Covered by a flexible conductive cover 14.

Please refer to FIG. 7 for a schematic view of another preferred embodiment of the present invention. As shown in the figure, the liquid crystal panel 1 can be fabricated on both sides in addition to the single layer.

The liquid crystal glue 11 is coated on the top surface and the bottom surface of the first flexible conductive substrate 15 respectively, and then covered by a second flexible conductive substrate 16 respectively; in the manufacturing process, the liquid crystal glue 11 can be used according to the foregoing method. After coating, the peelable film (not shown) is covered, and after the liquid crystal glue 11 is leveled and bubbles are removed, the second flexible conductive substrate 16 is covered by removing the peelable film.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; any changes and modifications made by those skilled in the art without departing from the spirit and scope of the invention All should be covered by the patent of the present invention.

In summary, the "liquid crystal panel manufacturing method" of the present invention has the patented invention and the use value of the industry; the applicant applies for an invention patent to the bureau in accordance with the provisions of the patent law.

1. . . LCD panel

10. . . Flexible conductive substrate

11. . . Liquid crystal glue

12. . . Peelable film

13. . . Side baffle

14. . . Flexible conductive cover

15. . . First flexible conductive substrate

16. . . Second flexible conductive substrate

Figure 1 is a flow chart of a preferred embodiment of the present invention.

Figure 2 is a flow chart 1 of a preferred embodiment of the present invention.

FIG. 3 is a second schematic diagram of a flow chart of a preferred embodiment of the present invention.

Figure 4 is a flow chart 3 of a preferred embodiment of the present invention.

Figure 5 is a flow chart 4 of a preferred embodiment of the present invention.

Figure 6 is a schematic view of still another preferred embodiment of the present invention.

Figure 7 is a schematic view of still another preferred embodiment of the present invention.

Figure 8A is an enlarged view of the conventional dual substrate alignment.

Figure 8B is an enlarged view of the alignment of a single substrate.

Figure 8C is an enlarged view of the alignment of the preferred embodiment of the present invention.

100~103. . . LCD panel manufacturing method steps

Claims (24)

A method for manufacturing a liquid crystal panel, comprising the steps of: providing a liquid crystal material mixed with a UV curable adhesive to form a liquid crystal adhesive, wherein the liquid crystal adhesive comprises a dendritic polyfunctional oligomer; providing a soft conductive substrate; coating the liquid crystal adhesive On the flexible conductive substrate; and covering a surface of the liquid crystal adhesive for performing a back-end process, wherein the back-end process comprises performing ultraviolet exposure, and the liquid crystal glue is separated to form a micronized liquid crystal, and the liquid crystal molecules have a period The arrangement is evenly distributed throughout the liquid crystal glue. The "liquid crystal panel manufacturing method" according to the first aspect of the invention, wherein the ultraviolet curable gel contains a photoinitiator. The "liquid crystal panel manufacturing method" according to the first aspect of the invention, wherein the ultraviolet curable adhesive is 10% to 30% of an acrylated dendrimer oligomer, 70% to 90% of a single A functional monomer is mixed with a small amount of a photoinitiator. The "liquid crystal panel manufacturing method" according to the first aspect of the invention, wherein the ultraviolet curable adhesive is 10% to 30% of an acrylated dendrimer oligomer, 10% to 30%. A difunctional monomer, 50% to 70% of a monofunctional monomer, a small amount of a photoinitiator, and a small amount of a surface tension controlling agent are mixed. The "liquid crystal panel manufacturing method" according to the third or fourth aspect of the invention, wherein the acrylated dendrimer oligomer is selected from a trifunctional oligomer to Dendrimer composed of a 19-functional oligomer One of the groups of acrylated dendrimer oligomers. The "liquid crystal panel manufacturing method" according to the third or fourth aspect of the invention, wherein the acrylated dendrimer oligomer is a hexafunctional oligomer (oligomer) or nineteen Functional oligomer. The "liquid crystal panel manufacturing method" according to the fourth aspect of the invention, wherein the surface tension controlling agent is a surface tension controlling agent of siloxane or fluorine. The "liquid crystal panel manufacturing method" according to the first aspect of the invention, wherein the liquid crystal material is a nematic liquid crystal material or an optically nematic liquid crystal material. The "liquid crystal panel manufacturing method" according to the first aspect of the invention, wherein the flexible conductive substrate is made of a conductive polymer material or a conductive material is added to a plastic material. The "liquid crystal panel manufacturing method" according to the first aspect of the invention, wherein the back-end process further comprises: removing the peelable film, the flexible conductive substrate Become a single substrate component. A liquid crystal adhesive which is mixed with a UV curable adhesive and coated on a flexible conductive substrate, wherein the UV curable adhesive is a 10% to 30% dendritic polyfunctional oligomer. (acrylated dendrimer oligomer), 70% to 90% of a monofunctional monomer (monomer) mixed with a small amount of photoinitiator. The "liquid crystal adhesive" as described in claim 11, wherein the ultraviolet curable adhesive is 10% to 30% of an acrylated dendrimer oligomer, and 10% to 30% of a difunctional group. A monomer, 50% to 70% of a monofunctional monomer, a small amount of a photoinitiator, and a small amount of a surface tension controlling agent are mixed. The "liquid crystal glue" of claim 11 or 12, wherein the acrylated dendrimer oligomer is selected from the group consisting of trifunctional oligomers (oligomers) to nineteen One of a group of acrylated dendrimer oligomers composed of functional oligomers. The "liquid crystal glue" according to claim 13, wherein the acrylated dendrimer oligomer is a hexafunctional oligomer or a ninyl-functional oligomer ( Oligomer). The "liquid crystal glue" according to claim 12, wherein the surface tension controlling agent is a siloxane or a fluorine-containing surface tension controlling agent. The "liquid crystal adhesive" as described in claim 11, wherein the flexible conductive substrate is a transparent ITO soft substrate or a conductive material is added to a plastic material. The "liquid crystal panel manufacturing method" according to claim 11, wherein the liquid crystal material is a nematic liquid crystal material or an optically nematic liquid crystal material. A liquid crystal panel structure having a first flexible conductive substrate and a second flexible conductive substrate disposed on the top surface and the bottom surface thereof, wherein the first flexible conductive substrate and the second flexible conductive substrate There is disposed a liquid crystal glue mixed with a liquid crystal material and a UV curable glue, wherein the ultraviolet curable adhesive is 10% to 30% of an acrylated dendrimer oligomer, 70%. ~90% monofunctional monomer (monomer) is mixed with a small amount of photoinitiator. The "liquid crystal panel structure" as described in claim 18, wherein the ultraviolet curable adhesive is 10% to 30% of an acrylated dendrimer oligomer, 10% to 30% of the second Functional monomer (monomer), 50% to 70% monofunctional A monomer, a small amount of a photoinitiator, and a small amount of surface tension controlling agent are mixed. The "liquid crystal panel structure" as described in claim 18 or claim 19, wherein the acrylated dendrimer oligomer is selected from the group consisting of trifunctional oligomers to ten One of a group of polyfunctional oligomers consisting of a non-functional oligomer. The "liquid crystal panel structure" according to claim 20, wherein the acrylated dendrimer oligomer is a hexafunctional oligomer or a ninyl-functional oligomer. (oligomer). The "liquid crystal panel structure" according to claim 19, wherein the surface tension controlling agent is a surface tension controlling agent of siloxane or fluorine. The "liquid crystal panel structure" according to claim 18, wherein the first and second flexible conductive substrates are made of a conductive polymer material, or a conductive material is added to a plastic material. to make. The "liquid crystal panel manufacturing method" according to claim 18, wherein the liquid crystal material is a nematic liquid crystal material or an optically nematic liquid crystal material.