CN101241260A - Optical film, manufacturing method thereof, substrate structure and display panel using optical film - Google Patents

Abstract

The invention discloses an optical film, a manufacturing method thereof, a substrate structure and a display panel using the optical film. The manufacturing method of the optical film includes the following steps. First, a substrate is provided, and then an alignment process is performed on the surface of the substrate or an alignment layer is formed on the substrate. Then, a pattern defining layer is formed on the orientation-treated surface of the substrate or on the surface of the orientation layer at a first temperature. And then coating a first liquid crystal layer on the surface of the substrate subjected to the orientation treatment or the surface of the orientation layer in a mode of covering the pattern definition layer, and then carrying out a first curing step at a second temperature so that the pattern definition layer and the first liquid crystal layer form an optical film, wherein the liquid crystal arrangement characteristic of the optical film with the pattern definition layer part in the optical film is different from the liquid crystal arrangement characteristic of the optical film with the other part.

Description

Optical film, manufacturing method thereof, substrate structure and display panel using same

technical field

The present invention relates to an optical film and its manufacturing method as well as substrate structure and display panel using the optical film, and in particular to a multifunctional optical film and its manufacturing method as well as the substrate structure and display using the optical film The panel can manufacture a multifunctional optical film composed of a patterned liquid crystal film and a non-patterned liquid crystal film in a simplified process.

Background technique

Traditionally, the process of the optical film of the display panel is usually carried out by means of sticking. That is, various optical films are attached to the substrate layer by layer through an adhesive material, and an additional protective layer is usually required to protect these optical films. Afterwards, the substrate on which the multilayer optical film has been pasted is pasted on the display panel in an externally pasted manner. In the traditional method, an adhesive material is required between the optical film layers, and the optical film needs the support of the substrate and the protection of the protective layer. Therefore, not only the material cost of the optical film is high, but also the optical properties of the optical film are affected, and the thickness of the optical film produced in this way is also very thick.

For traditional patterned compensation films used in 3D or transflective displays, a method of forming a patterned compensation film using a non-adhesive method has been proposed. However, when integrating other film layers such as polarizing film to form a multilayer optical film, since the patterned compensation film and polarizing film used are all liquid crystal material layers, an alignment layer is required between the two liquid crystal layers To make a specific orientation to the liquid crystal layer. Since an additional alignment layer needs to be formed between every two liquid crystal layers, the process of such an optical film is quite cumbersome, and the thickness of the optical film cannot be effectively reduced.

Moreover, in the conventional manufacturing method of patterned compensation film, a pattern definition layer made of photoresist material is formed on the alignment layer, and then a liquid crystal layer is formed on the pattern definition layer, thereby forming a patterned compensation film. membrane. However, the above method has the following problem: since the photoresist material and the liquid crystal belong to different materials, there will be low bonding at the interface and boundary. Moreover, if the photoresist material is used as the pattern definition layer, only two states of arrangement and non-arrangement can be defined, thus limiting the applicability of the patterned compensation film.

Contents of the invention

The invention provides an optical film, which has at least one layer of patterned liquid crystal film, and the patterned liquid crystal film can have various liquid crystal alignment characteristics.

The present invention further provides an optical film, which has at least one layer of patterned liquid crystal film, and does not need another alignment film between the film layers.

The present invention further provides a method for manufacturing an optical film, which can manufacture a patterned liquid crystal film with a variety of different liquid crystal alignment characteristics, and can define the liquid crystal alignment mode therein.

The present invention further provides a method for manufacturing an optical film, which can manufacture a multilayer optical film with any combination of a patterned liquid crystal film and a non-patterned liquid crystal film, and does not require an additional alignment film between the film layers.

The present invention further provides a method for manufacturing an optical film, capable of forming a patterned optical film without using a mask.

The present invention further provides a method for manufacturing an optical film to solve the disadvantages of tedious and high-cost traditional optical film processes.

The present invention also provides a substrate structure of a display panel, wherein the optical film is directly formed on the substrate, thus no additional attaching process is required to attach the optical film to the substrate.

The present invention further provides a display panel, the optical film of which is directly formed on the display panel, thus having the advantages of simplifying the process and reducing the cost.

The invention provides an optical film, which includes a substrate, a first liquid crystal layer and a second liquid crystal layer. Wherein the surface of the substrate is an alignment surface or an alignment layer is arranged on the surface of the substrate, the first liquid crystal layer is arranged on the alignment surface or the alignment layer, and the second liquid crystal layer is arranged on the surface of the first liquid crystal layer, and the first and second liquid crystal layers are arranged on the surface of the first liquid crystal layer. The two liquid crystal layers constitute a multilayer film. At least one of the first and second liquid crystal layers is a patterned liquid crystal layer, the patterned liquid crystal layer includes at least two patterned regions, and the patterned liquid crystal layers in the patterned regions have different liquid crystal alignment characteristics.

In an embodiment of the present invention, one of the above-mentioned first liquid crystal layer and the second liquid crystal layer is a compensation liquid crystal layer, and the other is a polarizing liquid crystal layer.

In an embodiment of the present invention, it further includes at least one liquid crystal layer disposed on the surface of the second liquid crystal layer, wherein the first and second liquid crystal layers and the at least one liquid crystal layer form a multilayer film.

In an embodiment of the present invention, the materials of the first liquid crystal layer and the second liquid crystal layer respectively include liquid crystal monomers, liquid crystal polymers, liquid crystal oligomers or liquid crystal materials containing dyes.

The invention provides a method for manufacturing an optical film, which includes the following steps. Firstly, a substrate is provided, and then alignment treatment is performed on the surface of the substrate or an alignment layer is formed on the substrate. Then, at the first temperature, a pattern definition layer is formed on the surface of the substrate after orientation treatment or on the surface of the alignment layer, wherein the material of the pattern definition layer includes liquid crystal material. Next, coat the first liquid crystal layer on the orientation-treated surface of the substrate or on the surface of the orientation layer in such a way as to cover the pattern-defining layer, and then perform a first curing step at a second temperature, so that the pattern-defining layer and The first liquid crystal layer constitutes an optical film in which a portion of the optical film having the pattern definition layer has a liquid crystal alignment characteristic different from that of other portions of the optical film.

In an embodiment of the present invention, the first curing step includes ultraviolet curing.

In an embodiment of the present invention, the methods for coating the first liquid crystal layer include spin coating, blade coating, roller coating or extrusion die blade coating.

In an embodiment of the present invention, it further includes forming a second liquid crystal layer on the surface of the substrate after the alignment treatment or on the surface of the alignment layer before forming the pattern definition layer.

In an embodiment of the invention, the first temperature is different from the second temperature.

In an embodiment of the present invention, wherein the method of forming the pattern definition layer on the orientation-treated surface of the substrate or the surface of the alignment layer at the first temperature comprises: forming the pattern definition layer on the orientation-treated surface of the substrate or the alignment layer The third liquid crystal layer is coated on the surface of the liquid crystal layer, and then at the first temperature, the third liquid crystal layer is subjected to a second curing step using a patterned mask, so that the exposed part of the third liquid crystal layer is cured, and then the first liquid crystal layer is removed. Three unexposed portions of the liquid crystal layer are used to form the pattern definition layer.

In an embodiment of the present invention, the second curing step includes ultraviolet curing.

In an embodiment of the present invention, the methods for coating the third liquid crystal layer include spin coating, blade coating, roller coating, or extrusion die blade coating.

In an embodiment of the present invention, wherein the method of forming the pattern definition layer on the orientation-treated surface of the substrate or the surface of the alignment layer at the first temperature comprises: forming the pattern definition layer on the orientation-treated surface of the substrate or the alignment layer Coating the fourth liquid crystal layer on the surface, and then performing the third curing step at the first temperature to cure the fourth liquid crystal layer, and then scanning the part of the cured fourth liquid crystal layer with a laser, and then removing the The area of the fourth liquid crystal layer is scanned to form a pattern definition layer.

In an embodiment of the present invention, the third curing step includes ultraviolet curing.

In an embodiment of the present invention, the methods for coating the fourth liquid crystal layer include spin coating, blade coating, roller coating, or extrusion die blade coating.

The invention provides a substrate structure of a display panel, which includes a substrate, a first alignment layer, a first liquid crystal layer and a second liquid crystal layer. Wherein the element layer has been arranged on the substrate, the first alignment layer is arranged on the surface of the substrate, the first liquid crystal layer is arranged on the surface of the first alignment layer, the second liquid crystal layer is arranged on the surface of the first liquid crystal layer, and the second liquid crystal layer is arranged on the surface of the first liquid crystal layer. One and the second liquid crystal layer form a multi-layer film. Wherein at least one of the first and second liquid crystal layers is a patterned liquid crystal layer, the patterned liquid crystal layer includes at least two patterned regions, and the patterned liquid crystal layers of the patterned regions have different liquid crystal alignment characteristics.

In an embodiment of the present invention, it further includes a second alignment layer disposed on the other surface of the substrate.

In an embodiment of the present invention, one of the first liquid crystal layer and the second liquid crystal layer is a compensation liquid crystal layer, and the other is a polarizing liquid crystal layer.

In an embodiment of the present invention, it further includes at least one liquid crystal layer disposed on the surface of the second liquid crystal layer, wherein the first and second liquid crystal layers and at least one liquid crystal layer form a multilayer film.

In an embodiment of the present invention, the materials of the first liquid crystal layer and the second liquid crystal layer respectively include liquid crystal monomers, liquid crystal polymers, liquid crystal oligomers or liquid crystal materials containing dyes.

In an embodiment of the present invention, the element layer includes an active element array layer, a passive element layer, a color filter layer or a common electrode layer.

The invention provides a liquid crystal panel, which comprises a first substrate, a first alignment layer, a first multilayer film, a second substrate, a second alignment layer, a second multilayer film and a display medium. Wherein the first element layer has been arranged on the first substrate, the first alignment layer is arranged on the surface of the first substrate, and the first multilayer film is arranged on the surface of the first alignment layer, wherein the first multilayer film is composed of at least It is composed of two liquid crystal layers. The second substrate is arranged opposite to the first substrate, and the second element layer has been arranged on the second substrate, the second alignment layer is arranged on the surface of the second substrate, and the second multilayer film is arranged on the second alignment layer. On the surface, the second multilayer film is composed of at least two liquid crystal layers. And the display medium is disposed between the first substrate and the second substrate. Wherein at least one of the liquid crystal layers of the first multilayer film and the second multilayer film is a patterned liquid crystal layer, the patterned liquid crystal layer includes at least two patterned regions, and the liquid crystal of the patterned liquid crystal layer in the patterned regions The array properties are different.

In an embodiment of the present invention, a third alignment layer and a fourth alignment layer are further included. Wherein the third alignment layer is arranged on the first multilayer film, and the fourth alignment layer is arranged on the second multilayer film, wherein the display medium is arranged between the third alignment layer and the fourth alignment layer.

In an embodiment of the present invention, a third alignment layer and a fourth alignment layer are further included. Wherein the third alignment layer is configured on the other surface of the first substrate, and the fourth alignment layer is configured on the other surface of the second substrate, wherein the display medium is located between the third alignment layer and the fourth alignment layer.

In an embodiment of the present invention, a third alignment layer and a fourth alignment layer are further included. Wherein the third alignment layer is configured on the first multilayer film, and the fourth alignment layer is configured on the other surface of the second substrate, wherein the display medium is located between the third alignment layer and the fourth alignment layer.

In an embodiment of the present invention, a third alignment layer and a fourth alignment layer are further included. Wherein the third alignment layer is configured on the other surface of the first substrate, and the fourth alignment layer is configured on the second multilayer film, wherein the display medium is located between the third alignment layer and the fourth alignment layer.

In an embodiment of the present invention, the first element layer and the second element layer respectively include an active element array layer, a passive element layer, a color filter layer or a common electrode layer.

The invention provides another method for manufacturing an optical film, which includes the following steps. Firstly, an alignment treatment is performed on the surface of the substrate or an alignment layer is formed on the substrate. Next, a liquid crystal layer is coated on the orientation-treated surface of the substrate or on the surface of the alignment layer, and then a curing step is performed to cure the liquid crystal layer. Partial areas of the cured liquid crystal layer are scanned with a laser, and then the liquid crystal layer in the laser scanned area is removed to form a patterned liquid crystal layer.

In an embodiment of the present invention, the curing step includes ultraviolet curing.

In an embodiment of the present invention, the methods of coating the liquid crystal layer include spin coating, blade coating, roller coating or extrusion die blade coating.

The present invention provides yet another method for manufacturing an optical film, which at least includes the following steps. Firstly, a substrate is provided, and then alignment treatment is performed on the surface of the substrate or an alignment layer is formed on the substrate. Coating a first liquid crystal layer on the surface of the substrate after orientation treatment or on the surface of the orientation layer, and then performing a first curing step. Coating a second liquid crystal layer on the surface of the first liquid crystal layer, and then performing a second curing step on the second liquid crystal layer using a patterned mask at a first temperature, so that the exposed part of the second liquid crystal layer Cured into the first patterned area. Carry out the third curing step to the second liquid crystal layer at the second temperature, so that the part other than the first patterned area of the second liquid crystal layer is solidified to form a second patterned area, wherein the liquid crystal of the liquid crystal layer in the first patterned area The alignment characteristic is different from that of the liquid crystal layer in the second pattern area.

In an embodiment of the present invention, the first, second and third curing steps include ultraviolet curing.

In an embodiment of the present invention, the methods for coating the first and second liquid crystal layers respectively include spin coating, blade coating, roller coating or extrusion die blade coating.

In an embodiment of the invention, the first temperature is different from the second temperature.

It can be seen from the above that the patterned liquid crystal film of the present invention can define the liquid crystal alignment mode as required, so that it can have various liquid crystal alignment characteristics, so its application range is wide.

Moreover, the optical film with the above-mentioned patterned liquid crystal film of the present invention only needs one layer of alignment layer, and can be directly formed on the alignment layer by any combination of patterned liquid crystal film and non-patterned liquid crystal film. The multilayer film, that is, there is no need to form an orientation layer between the layers of the multilayer film. Therefore, the optical film with the patterned liquid crystal film of the present invention has the advantages of simplifying the process and reducing the cost.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.

Description of drawings

FIG. 1A to FIG. 1F are cross-sectional schematic diagrams showing a manufacturing process of an optical film according to an embodiment of the present invention.

2A to 2B are schematic cross-sectional views of an optical film according to another embodiment of the present invention.

3A to 3B are schematic cross-sectional views of an optical film according to yet another embodiment of the present invention.

4A to 4C are schematic cross-sectional views showing the manufacturing process of an optical film according to another embodiment of the present invention.

5A to 5D are schematic cross-sectional views showing the manufacturing process of an optical film according to yet another embodiment of the present invention.

FIG. 6 is a schematic cross-sectional view of a substrate structure of a display panel according to an embodiment of the invention.

7 is a schematic cross-sectional view of a substrate structure of a display panel according to another embodiment of the present invention.

8 to 11 are schematic cross-sectional views of display panels according to several embodiments of the present invention.

[Description of main component symbols]

100: Substrate

102: Orientation layer

103, 104, 110, 112n: liquid crystal layer

103a, 103b, 110a, 110b: patterned areas

104a: Pattern definition layer

106: mask

108: UV light

112, 1121: patterned liquid crystal layer

114, 120: multilayer film

200: Substrate

202: Orientation layer

204: liquid crystal layer

204a: Laser scanning area

204b: patterning the liquid crystal layer

206: laser

300: Substrate

302: Orientation layer

304, 306, 307n: liquid crystal layer

306a, 306b: patterned area

307, 3071: patterned liquid crystal layer

308: mask

310, 312: ultraviolet light

320: multilayer film

400: blank substrate

401: Substrate

402: component layer

404: Orientation layer

406, 408n: liquid crystal layer

4081: Patterned liquid crystal layer

420: multilayer film

500, 600: blank substrate

501, 601: Substrate

502, 602: component layer

504, 604, 508, 608: alignment layer

505, 605: liquid crystal layer

506, 606: patterned liquid crystal layer

520, 620: multilayer film

700: display media

Detailed ways

Manufacturing method of optical film

1A to 1F are schematic cross-sectional views of the manufacturing process of an optical film according to an embodiment of the present invention. Referring to FIG. 1A , firstly, a substrate 100 is provided, and an alignment layer 102 has been formed on the substrate 100 . The substrate 100 can be a transparent substrate or an opaque substrate, and its material is, for example, glass or plastic. The material of the alignment layer 102 is, for example, an organic alignment material or an inorganic alignment material. In another embodiment, if the substrate 100 is a transparent substrate, alignment can be performed directly on the surface of the substrate 100 without additionally forming an alignment layer 102 .

Next, a layer of extremely thin liquid crystal layer 104 is coated on the surface of the alignment layer 102 or the surface of the transparent substrate 100 that has undergone alignment treatment. In one embodiment, the method of coating the liquid crystal layer 104 is, for example, spin coating, blade coating, roller coating or extrusion die blade coating. The material of the liquid crystal layer 104 is, for example, liquid crystal monomers, liquid crystal polymers, liquid crystal oligomers or liquid crystal materials containing dyes.

Next, please refer to FIG. 1B , at a specific first temperature, a curing step is performed using a mask 106 formed with a pattern, so that the liquid crystal layer 104 at the exposed portion through the mask 106 is cured. In one embodiment, the above-mentioned first temperature is, for example, greater than 90° C., and the curing step is, for example, an ultraviolet curing treatment by irradiating ultraviolet light 108 .

Next, referring to FIG. 1C , the unexposed and cured portion of the liquid crystal layer 104 is removed to form a pattern definition layer 104 a. In one embodiment, the method of removing the unexposed and cured portion of the liquid crystal layer 104 is, for example, cleaning with a suitable solution such as acetone.

Next, referring to FIG. 1D , the liquid crystal layer 110 is coated on the surface of the aforementioned substrate 100 after the alignment treatment or on the surface of the alignment layer 102 in such a manner as to cover the pattern definition layer 104 a. In one embodiment, the coating method and material of the liquid crystal layer 110 are the same or similar to the coating method and material of the liquid crystal layer 104 .

Next, please refer to FIG. 1E, at a second temperature, the liquid crystal layer 110 is subjected to a curing step, so that the pattern definition layer 104a and the liquid crystal layer 110 constitute a patterned liquid crystal layer 112, and the formed patterned liquid crystal layer 112 has a patterned area 110a and the patterned region 110b, and the patterned region 110a and the patterned region 110b will have different liquid crystal alignment characteristics. In one embodiment, the above-mentioned second temperature is, for example, room temperature, and the curing step is, for example, UV curing or heat curing.

Moreover, the patterned liquid crystal layer 112 manufactured by the above-mentioned method can be determined as a patterned polarizing optical film or a patterned liquid crystal layer according to the different liquid crystal materials selected according to the needs of practical applications. It is a patterned compensatory optical film.

Moreover, the above-mentioned embodiment is described by forming a pattern definition layer 104a, but the present invention is not limited thereto, and the present invention can also utilize different forming temperatures or different liquid crystal materials to form other pattern definition layers, thereby The finally manufactured patterned liquid crystal layer 112 can have multiple patterned regions, and the liquid crystal alignment characteristics of these patterned regions are different.

It is worth noting that, since this embodiment utilizes that liquid crystal alignment has different effects on different temperatures, the patterned layer 104a is formed under a specific first temperature to have specific liquid crystal alignment characteristics. Therefore, when the second temperature When the liquid crystal layer 110 is formed on it, the patterned region 110a of the patterned liquid crystal layer 112 having the pattern definition layer 104a and the patterned region 110b of other parts in the formed patterned liquid crystal layer 112 all have liquid crystal alignment characteristics, and the liquid crystal The array properties are different. Compared with the conventional situation where only arrangement and non-arrangement can be defined in the patterned compensation film, the present invention can arbitrarily define the arrangement of liquid crystals in these areas according to the needs of practical applications, so that it can be used in patterned liquid crystal A plurality of regions with different liquid crystal alignment characteristics are defined in layer 112 . Therefore, the patterned optical film formed in this embodiment will have wider applicability.

It is also worth noting that since the present invention uses liquid crystal material to form the pattern definition layer 104a, when the liquid crystal layer 110 is formed on it, since the two liquid crystal layers themselves will self-assemble due to functional groups, the double-layer There will be cross-linking at the interface and boundary, which will further improve the stability and durability of the optical film.

In the aforementioned embodiments, a patterned liquid crystal layer 112 is described, but the present invention is not limited thereto. Please refer to FIG. 1F, the present invention can also form at least one liquid crystal layer 112 _n on the surface of the patterned liquid crystal layer 112 ₁ , therefore, the multilayer film 114 is composed of the patterned liquid crystal layer 112 ₁ and at least one liquid crystal layer 112 _n constituted. Moreover, the present invention can utilize the self-assembly property of the liquid crystal layer. Between each liquid crystal layer in the multilayer film 112, there is no need to additionally form an alignment layer or an adhesive layer or other film layers. In addition, the number of liquid crystal layers in the multilayer film 112 , the material of each liquid crystal layer, and the location of the liquid crystal layers can be determined according to the required functions of the actual optical film (such as polarization, compensation, wide viewing angle, etc.).

FIG. 2A is a schematic cross-sectional view of an optical film according to another embodiment of the present invention. The components in FIG. 2A that are the same as those in FIG. 1A to FIG. 1F use the same reference numerals, and their descriptions are omitted. In this embodiment, the difference between FIG. 2A and FIG. 1E is that the liquid crystal layer 103 is formed on the alignment layer 102 in FIG. 2A , while the patterned liquid crystal layer 112 is formed on the liquid crystal layer 103 . The manufacturing method of the optical film of FIG. 2A is, for example, to form the liquid crystal layer 103 on the surface of the alignment layer 102 or on the surface of the transparent substrate 100 that has undergone alignment treatment. The method for forming the patterned liquid crystal layer 112 is as shown in FIG. The methods described in FIG. 1A to FIG. 1E will not be repeated here.

One of the liquid crystal layer 103 and the patterned liquid crystal layer 112 may be a compensatory liquid crystal layer, while the other is a polarizing liquid crystal layer. That is, the liquid crystal layer 103 is a compensatory liquid crystal layer and the patterned liquid crystal layer 112 is a patterned polarized liquid crystal layer. Alternatively, the liquid crystal layer 103 is a polarized liquid crystal layer and the patterned liquid crystal layer 112 is a patterned compensatory liquid crystal layer.

In addition to the aforementioned advantages, the optical film of FIG. 2A also has the following advantages: no additional alignment layer or adhesive layer needs to be configured between the above-mentioned liquid crystal layer 103 and the patterned liquid crystal layer 112, and the liquid crystal layer 103 can pass through the optical film. Directly contact with the patterned liquid crystal layer 112 to self-assemble, so that the alignment effect is transferred from the alignment layer 102 to the patterned liquid crystal layer 112 through the liquid crystal layer 103 .

Similarly, FIG. 2A shows the formation of a patterned liquid crystal layer 112, but the invention is not limited thereto. Please refer to FIG. 2B , the present invention can also be as shown in FIG. 1F and related descriptions, forming a liquid crystal layer 112 composed of a patterned liquid crystal layer 112 ₁ and at least one liquid crystal layer 112 _n on the surface of the liquid crystal layer 103, and The multilayer film 120 is composed of the liquid crystal layer 103, the liquid crystal layer ₁₁₂₁ and at least one liquid crystal layer _112n .

FIG. 3A is a schematic cross-sectional view of an optical film according to another embodiment of the present invention. The components in FIG. 3A that are the same as those in FIG. 2A use the same reference numerals, and their descriptions are omitted. In this embodiment, the difference between FIG. 3A and FIG. 2A is that the liquid crystal layer 103 in FIG. 3A is also a patterned film layer, wherein the liquid crystal layer 103 having a patterned region 103a and a patterned region 103b is formed. method. For example, it can be formed by the method described in FIG. 1A to FIG. 1E and will not be repeated here. Similarly, the method for forming the patterned liquid crystal layer 112 is as described in FIG. 1A to FIG. 1E and will not be repeated here.

One of the liquid crystal layer 103 and the patterned liquid crystal layer 112 may be a compensatory liquid crystal layer, while the other is a polarizing liquid crystal layer. That is, the liquid crystal layer 103 is a patterned compensation liquid crystal layer and the patterned liquid crystal layer 112 is a patterned polarized liquid crystal layer. Alternatively, the liquid crystal layer 103 is a patterned polarizing liquid crystal layer and the patterned liquid crystal layer 112 is a patterned compensatory liquid crystal layer.

Similarly, FIG. 3A shows that a patterned liquid crystal layer 112 is formed, but the present invention is not limited thereto. Referring to FIG. 3B , the present invention can also form a liquid crystal layer 112n composed of a patterned liquid crystal layer 1121 and at least one liquid crystal layer 112n on the surface of the liquid crystal layer 103 as shown in FIG. 1F and related descriptions. The multi-layer film 120 is composed of the liquid crystal layer 103, the liquid crystal layer 1121 and at least one liquid crystal layer 112n.

Based on the above-mentioned manufacturing method of the multilayer film, it can be seen that both the patterned liquid crystal film and the non-patterned liquid crystal film in the multilayer film of the present invention can be formed by coating and curing related processes, and between each film layer There is no need to form an alignment layer, an adhesive layer, etc. Therefore, the present invention will be able to form a multilayer optical film composed of a patterned liquid crystal film and a non-patterned liquid crystal film in a relatively simple process.

Another manufacturing method of optical film

4A to 4C are schematic cross-sectional views showing the manufacturing process of an optical film according to another embodiment of the present invention. Referring to FIG. 4A , firstly, a substrate 200 is provided, and an alignment layer 202 has been formed on the substrate 200 . The substrate 200 can be a transparent substrate or an opaque substrate, and its material is, for example, glass or plastic. The material of the alignment layer 202 is, for example, an organic alignment material or an inorganic alignment material. In another embodiment, if the substrate 200 is a transparent substrate, alignment can be performed directly on the surface of the substrate 200 without additionally forming an alignment layer 202 .

Next, a layer of liquid crystal layer 204 is coated on the surface of the alignment layer 202 or the surface of the transparent substrate 200 that has undergone alignment treatment. In one embodiment, the method of coating the liquid crystal layer 204 is, for example, spin coating, blade coating, roller coating or extrusion die blade coating. The material of the liquid crystal layer 204 is, for example, liquid crystal monomers, liquid crystal polymers, liquid crystal oligomers or liquid crystal materials containing dyes. Next, a curing step is performed to cure the previously applied liquid crystal layer 204 . In one embodiment, the above curing step is, for example, UV curing.

Next, please refer to FIG. 4B , using a laser 206 to scan and expose a part of the cured liquid crystal layer 204 without going through a mask. In one embodiment, for example, the laser 206 is used to scan the region 204 a of the liquid crystal layer 204 to break the liquid crystal crosslinks therein. Furthermore, in an embodiment, laser scanning exposure can also be performed through a mask.

Next, referring to FIG. 4C , the area 204 a of the liquid crystal layer 204 scanned by the laser 206 is removed to form a patterned liquid crystal layer 204 b. In one embodiment, the method of removing the region 204 a scanned by the laser 206 is, for example, cleaning with a suitable solution such as acetone.

It is worth noting that since this embodiment uses laser light to scan the cured liquid crystal layer, and then removes the part that has been scanned by the laser, it can be patterned even for the cured liquid crystal layer craft. Moreover, since the mask is not necessary in the laser scanning process, that is, the present embodiment can be directly performed without passing through the mask, so the use of the mask can be avoided, thereby simplifying the process.

It is also worth noting in this case that the manufacturing method of the optical film of this embodiment can be applied to manufacturing the pattern definition layer 104a of FIG. It is cured at a specific first temperature by the laser process in FIG. 4B and the removal process in FIG. 4C to obtain the pattern definition layer 104 a as shown in FIG. 1C .

Still another manufacturing method of optical film

5A to 5D are schematic cross-sectional views of the manufacturing process of the optical film according to an embodiment of the present invention. Referring to FIG. 5A , firstly, a substrate 300 is provided, and an alignment layer 302 has been formed on the substrate 300 . The substrate 300 can be a transparent substrate or an opaque substrate, and its material is, for example, glass or plastic. The material of the alignment layer 302 is, for example, an organic alignment material or an inorganic alignment material. In another embodiment, if the substrate 300 is a transparent substrate, it can be directly aligned on the surface of the substrate 100 without additionally forming the alignment layer 302 .

Next, a layer of liquid crystal layer 304 is coated on the surface of the alignment layer 302 or the surface of the transparent substrate 300 that has undergone alignment treatment. In one embodiment, the method of coating the liquid crystal layer 304 is, for example, spin coating, blade coating, roller coating or extrusion die blade coating. The material of the liquid crystal layer 304 is, for example, liquid crystal monomers, liquid crystal polymers, liquid crystal oligomers or liquid crystal materials containing dyes.

Next, referring to FIG. 5B , a liquid crystal layer 306 is coated on the surface of the liquid crystal layer 304 , and the coating method and material thereof are the same or similar to those of the liquid crystal layer 304 . Next, a curing step is performed using the patterned mask 308 at a specific first temperature, so that the liquid crystal layer 306 exposed through the mask 308 is cured. In one embodiment, the above-mentioned first temperature is, for example, greater than 90° C., and the curing step is, for example, an ultraviolet curing treatment by irradiating ultraviolet light 310 .

Next, please refer to FIG. 5C, at a second temperature, the liquid crystal layer 306 is subjected to a curing step to form a patterned liquid crystal layer 307, the formed patterned liquid crystal layer 307 has a patterned region 306a and a patterned region 306b, and the patterned Region 306a and patterned region 306b will have different liquid crystal alignment characteristics. In one embodiment, the above-mentioned second temperature is, for example, room temperature, and the curing step is, for example, an ultraviolet curing treatment of irradiating ultraviolet light 312 .

It is particularly noteworthy that the liquid crystal layer 304 and the patterned liquid crystal layer 307 of this embodiment will have the effect of self-assembly as described above. Moreover, the patterned liquid crystal layer 307 of this embodiment has an effect on different temperatures through the arrangement of liquid crystals. Depending on the effect, the liquid crystal alignment modes of these regions can be defined according to the needs of practical applications, so as to define a plurality of regions with different liquid crystal alignment characteristics in the patterned liquid crystal layer 307 .

Moreover, in the above-mentioned embodiments, it is described that a patterned liquid crystal layer 307 is formed, but the present invention is not limited thereto. Please refer to FIG. 5D, the present invention can also form at least one liquid crystal layer 307n on the surface of the patterned liquid crystal layer 3071, therefore, the multilayer film 320 is composed of the liquid crystal layer 304, the patterned liquid crystal layer 3071 and at least one liquid crystal layer 307n constituted. Moreover, the present invention can utilize the self-assembly property of the liquid crystal layer. Between each liquid crystal layer in the multilayer film 320, there is no need to additionally form an alignment layer or an adhesive layer or other film layers. In addition, the number of liquid crystal layers in the multilayer film 320 , the material of each liquid crystal layer, and the location of the liquid crystal layers can be determined according to the required functions of the actual optical film (such as polarization, compensation, wide viewing angle, etc.).

Similarly, both the patterned liquid crystal film and the non-patterned liquid crystal film in the multilayer film of FIG. 5D can be formed by coating and curing related processes, and there is no need to form an alignment layer or an adhesive layer between the film layers. etc. Therefore, it will be possible to form a multilayer optical film composed of any combination of patterned liquid crystal film and non-patterned liquid crystal film in a relatively simple process.

Substrate structure of display panel

The above optical film can be directly formed on the substrate structure of the display panel, so that the substrate structure has the required properties of polarization, compensation, wide viewing angle and the like. FIG. 2 is a schematic cross-sectional view of a substrate structure for a display panel according to an embodiment of the invention. Referring to FIG. 6 , the substrate structure of this embodiment includes a substrate 401 , an alignment layer 404 and a multilayer film 420 .

The substrate 401 includes a blank substrate 400 and an element layer 402 formed on the blank substrate 400 . The element layer 402 is, for example, an active element array layer, a passive element layer, a color filter layer or a common electrode layer.

In addition, the alignment layer 404 is disposed on the surface of the element layer 402, and the material of the alignment layer 404 can be an organic or inorganic alignment material. The multilayer film 420 is disposed on the surface of the alignment layer 404 . In particular, the multilayer film 420 includes a liquid crystal layer 406 and a patterned liquid crystal layer 4081 . According to another embodiment, in addition to the liquid crystal layer 406 and the patterned liquid crystal layer 4081 , the multilayer film 420 may further stack at least one liquid crystal layer 408 n on the surface of the patterned liquid crystal layer 4081 . The materials and formation methods of the liquid crystal layer 406, the patterned liquid crystal layer 4081, and the liquid crystal layer 408n are the same as the liquid crystal layer described in the previous description of the manufacturing method of the optical film (please refer to FIGS. 1A to 3B or FIGS. 5A to 5D). The material is the same or similar to the method of formation.

7 is a schematic cross-sectional view of a substrate structure of a display panel according to another embodiment of the present invention. Please refer to FIG. 7 , the substrate structure of FIG. 7 is similar to that of FIG. 6 , except that the alignment layer 404 and the multilayer film 420 are formed on the other surface of the substrate 400 . That is to say, the element layer 402 is formed on one surface of the substrate 400 , and the alignment layer 404 and the multilayer film 420 are formed on the other surface of the substrate 400 .

Since the optical film of the present invention is composed of various film layers such as a patterned liquid crystal film (including a compensation film and a polarizing film) and a non-patterned liquid crystal film (including a compensation film and a polarizing film) by coating and curing multilayer film, and there is no need to form an alignment layer between the layers of the multilayer film of the optical film, so the optical film of the present invention is applied to the production of the substrate structure of the display panel, and has the advantage of reducing the substrate structure of the display panel. Advantages of process steps as well as manufacturing costs. Moreover, the patterned liquid crystal film in the optical film can define the liquid crystal alignment mode therein as required, so that it can have a variety of different liquid crystal alignment characteristics, so its application range is wide.

The invention directly forms the alignment layer and the multilayer film on the substrate structure of the display panel to simplify the process and reduce the cost. However, the present invention is not limited thereto. In the present invention, an alignment layer and a multilayer film may also be formed on a substrate to form an optical film. After that, the optical film is bonded to the element substrate.

display panel

The above substrate structure can be combined with another substrate structure and a display medium to form a display panel, which is described in detail as follows. FIG. 8 is a schematic cross-sectional view of a display panel according to an embodiment of the invention. Referring to FIG. 8 , the display panel of this embodiment includes a substrate 501 , an alignment layer 504 , a multilayer film 520 , a substrate 601 , an alignment layer 604 , a multilayer film 620 and a display medium 700 .

The substrate 501 is composed of a blank substrate 500 and an element layer 502 formed on the blank substrate 500 . The element layer 502 is, for example, an active element array layer, a passive element layer, a color filter layer or a common electrode layer. In more detail, the element layer 502 can be an active element array layer, a passive element layer, a color filter layer or a shared electrode layer.

The alignment layer 504 is disposed on the surface of the substrate 501 . The multilayer film 520 is disposed on the surface of the alignment layer 504 , wherein the multilayer film 520 is at least composed of the liquid crystal layer 505 and the patterned liquid crystal layer 506 . In this embodiment, the liquid crystal layer 505 and the patterned liquid crystal layer 506 constitute the multilayer film 520 as an example for illustration, but the present invention does not limit the number of layers in the multilayer film 520 . The material and formation method of the liquid crystal layer 505 and the patterned liquid crystal layer 506 are the same as the liquid crystal layer material and formation method described in the previous description of the manufacturing method of the optical film (please refer to FIGS. 1A to 3B or FIGS. 5A to 5D ). Or similar, and will not repeat them here.

The substrate 601 is disposed opposite to the substrate 501 , and the substrate 601 is composed of a blank substrate 600 and an element layer 602 formed on the blank substrate 600 . The element layer 602 can be an active element array layer, a passive element layer, a color filter layer or a common electrode layer according to the type of the display panel and the corresponding element layer 502 . For example, if the display panel is an active display panel, the element layer 502 is, for example, an active element array layer, and the element layer 602 is, for example, a color filter array layer, a common electrode layer or a combination of both. If the display panel is a passive display panel, the element layer 502 is, for example, a passive element layer, and the element layer 602 is, for example, another passive element layer, a color filter array layer, or a combination of both.

The alignment layer 604 is disposed on the surface of the substrate 601 . The multilayer film 620 is disposed on the surface of the alignment layer 604 , wherein the multilayer film 620 is at least composed of the liquid crystal layer 605 and the patterned liquid crystal layer 606 . Similarly, in this embodiment, the liquid crystal layer 605 and the patterned liquid crystal layer 606 constitute the multilayer film 620 as an example for illustration, but the present invention does not limit the number of layers in the multilayer film 620 . The material and formation method of the liquid crystal layer 605 and the patterned liquid crystal layer 606 are the same as the liquid crystal layer material and formation method previously described in the description of the manufacturing method of the optical film (please refer to FIGS. 1A to 3B or FIGS. 5A to 5D ). Or similar, and will not repeat them here.

In addition, the display medium 700 is disposed between the substrate 501 and the substrate 601 . The display medium 700 is, for example, liquid crystal. If liquid crystal is used as the display medium 700, then the display panel is a liquid crystal display panel.

If the display panel needs an alignment layer to align the display medium, the display panel may further include the alignment layer 508 and the alignment layer 608 . The alignment layer 508 is disposed on the multilayer film 520 and the alignment layer 608 is disposed on the multilayer film 620 . The display medium 700 is disposed between the alignment layer 508 and the alignment layer 608 . The alignment layer 508 and the alignment layer 608 are mainly used to align the display medium 700 so that the display medium 700 has a certain pretilt angle.

There are other arrangements between the above-mentioned alignment layer 508 and alignment layer 608 and other film layers of the display panel. Referring to FIG. 9 , the alignment layer 504 and the multilayer film 520 are disposed on one surface of the substrate 501 , and the alignment layer 508 is disposed on the other surface of the substrate 501 . Similarly, the alignment layer 604 and the multilayer film 620 are disposed on one surface of the substrate 601, and the alignment layer 608 is disposed on the other surface of the substrate 601, wherein the display medium 700 is located between the alignment layer 508 and the alignment layer 608 Between, in order to orientate the display medium 700.

In addition, in another embodiment of the present invention, the arrangement of the alignment layer 508 and the alignment layer 608 with other film layers of the display panel is shown in FIG. 10 . The alignment layer 508 is disposed on the multilayer film 520, and the alignment layer 608 is disposed on the surface of the substrate 601 that is not disposed with the alignment layer 604 and the multilayer film 620, wherein the display medium 700 is located between the alignment layer 508 and the alignment layer 608 , so as to orientate the display medium 700 .

In addition, in another embodiment of the present invention, the arrangement of the alignment layer 508 and the alignment layer 608 with other film layers of the display panel is shown in FIG. 11 . The alignment layer 508 is disposed on the surface of the substrate 501 that is not disposed with the alignment layer 504 and the multilayer film 520, and the alignment layer 608 is disposed on the multilayer film 620, wherein the display medium 700 is located between the alignment layer 508 and the alignment layer 608 , so as to orientate the display medium 700 .

In the display panel of the present invention, since various film layers such as a patterned liquid crystal film (including a compensation film and a polarizing film) and a non-patterned liquid crystal film (including a compensation film and a polarizing film) are formed by coating and curing A multilayer film with any composition, and no additional alignment layer needs to be formed between the layers of the multilayer film of the optical film, so the display panel of the present invention has the advantages of cost saving and process simplification. Moreover, the patterned liquid crystal film in the optical film can define the liquid crystal alignment mode therein as required, so that it can have a variety of different liquid crystal alignment characteristics, so its application range is wide.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, this The scope of protection of the invention should be defined by the claims.

Claims (34)

1. blooming comprises:

Substrate, the surface of wherein said substrate are that the surface configuration of alignment surfaces or described substrate has oriented layer;

First liquid crystal layer is disposed on described alignment surfaces or the described oriented layer; And

Second liquid crystal layer is disposed on the surface of described first liquid crystal layer, and described first and second liquid crystal layer formation multilayer film,

Described first and second liquid crystal layer one of them is the patterning liquid crystal layer at least, described patterning liquid crystal layer comprises two patterned areas at least, the liquid crystal arrangement characteristic difference of the patterning liquid crystal layer of described patterned area.

2. as claim 1 a described blooming, one of them of wherein said first liquid crystal layer and described second liquid crystal layer is compensatory liquid crystal layer, and another is the polarity liquid crystal layer.

3. as claim 1 a described blooming, also comprise at least one liquid crystal layer, be disposed on the surface of described second liquid crystal layer that wherein said first, second liquid crystal layer and described at least one liquid crystal layer constitute described multilayer film.

4. as claim 1 a described blooming, the material of wherein said first liquid crystal layer and described second liquid crystal layer comprises liquid crystal monomer, liquid crystal polymer, liquid crystal oligomer respectively or contains the liquid crystal material of dyestuff.

5. the manufacture method of a blooming comprises:

Substrate is provided;

In carrying out orientation process on the surface of described substrate or on described substrate, forming oriented layer; Under first temperature in described substrate through forming the pattern definition layer on the surface of orientation process or on the surface of described oriented layer, the material of wherein said pattern definition layer comprises liquid crystal material;

Covering the mode of described pattern definition layer, in described substrate through coating first liquid crystal layer on the surface of orientation process or on the surface of described oriented layer; And

Under second temperature, carry out first curing schedule, so that described pattern definition layer and described first liquid crystal layer constitute blooming, the liquid crystal arrangement characteristic of blooming that has described pattern definition layer segment in the wherein said blooming is different with the liquid crystal arrangement characteristic of the blooming of other parts.

6. as the manufacture method of claim 5 a described blooming, wherein said first curing schedule comprises the ultraviolet light polymerization processing.

7. as the manufacture method of claim 5 a described blooming, the method that wherein is coated with described first liquid crystal layer comprises rotary coating, scraper coating, roller coating or the coating of extrusion die scraper respectively.

8. as the manufacture method of claim 5 a described blooming, wherein also be included in before described first liquid crystal layer of coating, in described substrate through forming second liquid crystal layer on the surface of orientation process or on the surface of described oriented layer.

9. as the manufacture method of claim 5 a described blooming, wherein said first temperature is different with described second temperature.

10. as the manufacture method of claim 5 a described blooming, wherein under described first temperature in described substrate through on the surface of orientation process or the method that forms described pattern definition layer on the surface of described oriented layer comprise:

In described substrate through coating the 3rd liquid crystal layer on the surface of orientation process or on the surface of described oriented layer;

Under described first temperature, use the figuratum mask of formation that described the 3rd liquid crystal layer is carried out second curing schedule, so that the exposure of described the 3rd liquid crystal layer is partly solidified; And

Remove the unexposed part of described the 3rd liquid crystal layer, to form the pattern definition layer.

11. as the manufacture method of claim 10 a described blooming, wherein said second curing schedule comprises the ultraviolet light polymerization processing.

12. as the manufacture method of claim 10 a described blooming, the method that wherein is coated with described the 3rd liquid crystal layer comprises rotary coating, scraper coating, roller coating or the coating of extrusion die scraper respectively.

13. as the manufacture method of claim 5 a described blooming, wherein the method through forming described pattern definition layer on the surface of orientation process or on the surface of described oriented layer in described substrate comprises under described first temperature:

In described substrate through coating the 4th liquid crystal layer on the surface of orientation process or on the surface of described oriented layer;

Carry out the 3rd curing schedule in described first temperature, so that described the 4th curable liquid crystal layer;

Use the subregion of laser scanning through described the 4th liquid crystal layer of curing; And

Remove described the 4th liquid crystal layer, to form the patterning definition layer through described laser scanning zone.

14. as the manufacture method of claim 13 a described blooming, wherein said the 3rd curing schedule comprises the ultraviolet light polymerization processing.

15. as the manufacture method of claim 13 a described blooming, the method that wherein is coated with described the 4th liquid crystal layer comprises rotary coating, scraper coating, roller coating or the coating of extrusion die scraper respectively.

16. the board structure of a display panel comprises:

Substrate has disposed element layer on the wherein said substrate;

First oriented layer is configured on the surface of described substrate;

First liquid crystal layer is disposed on the surface of described first oriented layer; And

Second liquid crystal layer is disposed on the surface of described first liquid crystal layer, and described first and second liquid crystal layer formation multilayer film,

Described first and second liquid crystal layer one of them is the patterning liquid crystal layer at least, described patterning liquid crystal layer comprises two patterned areas at least, the liquid crystal arrangement characteristic difference of the patterning liquid crystal layer of described patterned area.

17. as the board structure of claim 16 a described display panel, also comprise second oriented layer, be disposed on another surface of described substrate.

18. as the board structure of claim 16 a described display panel, one of them is compensatory liquid crystal layer for wherein said first liquid crystal layer and described second liquid crystal layer, another is the polarity liquid crystal layer.

19., also comprise at least one liquid crystal layer as the board structure of claim 16 a described display panel, be disposed on the surface of described second liquid crystal layer, wherein said first, second liquid crystal layer and described at least one liquid crystal layer constitute described multilayer film.

20. as the board structure of claim 16 a described display panel, the material of wherein said first liquid crystal layer and described second liquid crystal layer comprises liquid crystal monomer, liquid crystal polymer, liquid crystal oligomer respectively or contains the liquid crystal material of dyestuff.

21. as the board structure of claim 16 a described display panel, wherein said element layer comprises active device array layer, passive element layer, chromatic filter layer or common electrode layer.

22. a liquid crystal panel comprises:

First substrate has disposed first element layer on described first substrate;

First oriented layer is disposed on the surface of described first substrate;

First multilayer film is disposed on the surface of described first oriented layer, and wherein said first multilayer film is made of at least two layers of liquid crystal layer;

Second substrate is disposed at the subtend of described first substrate, and has disposed second element layer on described second substrate;

Second oriented layer is disposed on the surface of described second substrate;

Second multilayer film is disposed on the surface of described second oriented layer, and wherein said second multilayer film is made of at least two layers of liquid crystal layer; And

Display medium is disposed between described first substrate and described second substrate,

Wherein in the liquid crystal layer of described first multilayer film and described second multilayer film one of them is the patterning liquid crystal layer at least, described patterning liquid crystal layer comprises two patterned areas at least, the liquid crystal arrangement characteristic difference of the patterning liquid crystal layer of described patterned area.

23., also comprise as claim 22 a described display panel:

The 3rd oriented layer is disposed on described first multilayer film; And

The 4th oriented layer is disposed on described second multilayer film, and wherein said display medium is to be disposed between described the 3rd oriented layer and described the 4th oriented layer.

24., also comprise as claim 22 a described display panel:

The 3rd oriented layer is disposed on another surface of described first substrate; And

The 4th oriented layer is disposed on another surface of described second substrate, and wherein said display medium is between described the 3rd oriented layer and described the 4th oriented layer.

25., also comprise as claim 22 a described display panel:

The 3rd oriented layer is disposed on described first multilayer film; And

The 4th oriented layer is disposed on another surface of described second substrate, and wherein said display medium is between described the 3rd oriented layer and described the 4th oriented layer.

26., also comprise as claim 22 a described display panel:

The 3rd oriented layer is disposed on another surface of described first substrate; And

The 4th oriented layer is disposed on described second multilayer film, and wherein said display medium is between described the 3rd oriented layer and described the 4th oriented layer.

27. as claim 22 a described display panel, wherein said first element layer and described second element layer comprise active device array layer, passive element layer, chromatic filter layer or common electrode layer respectively.

28. the manufacture method of a blooming comprises:

Substrate is provided;

In carrying out orientation process on the surface of described substrate or on described substrate, forming oriented layer;

In described substrate through coating fluid crystal layer on the surface of orientation process or on the surface of described oriented layer;

Be cured step, so that described curable liquid crystal layer;

Use the subregion of laser scanning through the described liquid crystal layer of curing; And

Remove described liquid crystal layer, to form the patterning liquid crystal layer through described laser scanning zone.

29. as the manufacture method of claim 28 a described blooming, wherein said curing schedule comprises the ultraviolet light polymerization processing.

30. as the manufacture method of claim 28 a described blooming, the method that wherein is coated with described liquid crystal layer comprises rotary coating, scraper coating, roller coating or the coating of extrusion die scraper respectively.

31. the manufacture method of a blooming comprises:

Substrate is provided;

In carrying out orientation process on the surface of described substrate or on described substrate, forming oriented layer;

In described substrate through coating first liquid crystal layer on the surface of orientation process or on the surface of described oriented layer;

Carry out first curing schedule;

Coating second liquid crystal layer on the surface of described first liquid crystal layer;

Under first temperature, use the figuratum mask of formation that described second liquid crystal layer is carried out second curing schedule, so that described second liquid crystal layer is first patterned area through the partly solidified of exposure; And

Under second temperature, described second liquid crystal layer is carried out the 3rd curing schedule, so that partly solidified formation second patterned area beyond described first patterned area of described second liquid crystal layer, the liquid crystal arrangement characteristic of the liquid crystal layer of wherein said first patterned area is different with the liquid crystal arrangement characteristic of the liquid crystal layer of second pattern area.

32. as the manufacture method of claim 31 a described blooming, wherein said first, second and the 3rd curing schedule comprise that ultraviolet light polymerization handles.

33. as the manufacture method of claim 31 a described blooming, the method that wherein is coated with described first and second liquid crystal layer comprises rotary coating, scraper coating, roller coating or the coating of extrusion die scraper respectively.

34. as the manufacture method of claim 31 a described blooming, wherein said first temperature is different with described second temperature.

Images