CN105511006B - Polaroid, display base plate, liquid crystal display panel and preparation method thereof - Google Patents

Abstract

The invention provides a polarizer, a display substrate, a liquid crystal display panel and a preparation method thereof, which belong to the field of display technology and can solve the problems of poor alignment effect, low light transmittance and low polarization degree of the existing polarizer. The preparation method of the polarizer of the present invention includes the steps of forming an alignment layer and a polarizing layer, and forming the polarizing layer includes the following steps: coating a mixture on the alignment layer, and the mixture includes materials; orienting the mixture through a uniform magnetic field; curing the mixture to form the polarizing layer. The polarizer prepared by the polarizer preparation method of the present invention has consistent orientation, improves light transmittance and polarization degree, and has better display effect.

Description

Polarizer, display substrate, liquid crystal display panel and preparation method thereof

technical field

The invention belongs to the field of display technology, and in particular relates to a polarizer, a display substrate, a liquid crystal display panel and a preparation method thereof.

Background technique

The mainstream of existing display devices is a Liquid Crystal Display (LCD for short). LCD usually uses liquid crystal molecules to cooperate with polarizers to control whether light passes or not, so as to realize image display.

The preparation method of the existing polarizer is as follows: first, coating an alignment layer on a glass substrate; then, coating a mixture forming a polarizing layer on the alignment layer, and the mixture automatically aligns along the grooves on the alignment layer; finally, Curing the mixture forms a polarizing layer.

The inventors have found that the prior art has at least the following problems: the mixture forming the polarizing layer has a low degree of parallelism in the orientation direction on the orientation layer, and the orientation effect is poor, resulting in low transmittance and polarization of the polarizer made. Make the yield rate of the product at a low level.

It can be seen that designing a polarizer with a higher degree of parallelism in the orientation direction, a better orientation effect, and a higher light transmittance and polarization degree has become a technical problem to be solved urgently.

Contents of the invention

The present invention aims at the above existing technical problems, and provides a polarizer, a display substrate, a liquid crystal display panel and a preparation method thereof. Both the above-mentioned display substrate and the liquid crystal display panel include the above-mentioned polarizer, and the polarizer has good orientation effect, high light transmittance and polarization degree, and can significantly improve display quality.

The specific technical solution adopted to solve the above technical problems is to provide a method for preparing a polarizer, including the steps of forming an alignment layer and a polarizing layer, and forming the polarizing layer includes the following steps: coating a mixture on the alignment layer, The mixture includes a material that can be oriented under the action of a magnetic field; the mixture is oriented through a uniform magnetic field; and the mixture is cured to form the polarizing layer.

Preferably, the mixture includes dichroic dyes, UV-reactive liquid crystals, curing agents and solvents, and the step of orienting the mixture through a uniform magnetic field includes: energizing the solenoid to form a magnetic field, coating the The alignment layer of the mixture is placed in the uniform magnetic field formed by the solenoid, and the alignment direction of the alignment layer is kept consistent with the direction of the magnetic force lines of the uniform magnetic field formed by the solenoid.

Preferably, before the step of orienting the mixture through a uniform magnetic field, it also includes: first heating the mixture to an isotropic state, then cooling the mixture to normal temperature, and keeping the UV-reactive liquid crystal as liquid crystal state.

Preferably, the cross-sectional shape of the solenoid is any one of square, rectangle, circle and ellipse.

Preferably, the length of the solenoid is at least twice the length of the alignment layer.

Preferably, the electric current of the solenoid is in the range of 1A-100A.

Preferably, the ratio of the dichroic dye in the mixture ranges from 0.5wt% to 5wt%; the ratio of the UV reactive liquid crystal in the mixture ranges from 90wt% to 98wt%; the The proportion of the curing agent in the mixture ranges from 1 wt% to 5 wt%.

Preferably, the dichroic dye is anthraquinone dye or azo dye; the UV reactive liquid crystal is LC242 or RM257.

Preferably, the curing agent is a photoinitiator, and the photoinitiator adopts trimethylbenzoyl-diphenylphosphine oxide or ethyl trimethylbenzoylphenylphosphonate; solidifies the mixture, The step of forming the polarizing layer includes: irradiating the mixture with UV light, causing the photoinitiator to cure the mixture to form the polarizing layer.

Preferably, the curing agent is a thermal curing agent; the step of curing the mixture to form the polarizing layer includes: curing the mixture by the thermal curing agent to form the polarizing layer by means of thermal curing , wherein the thermal curing temperature ranges from 80°C to 400°C.

Preferably, the mixture further includes a heat insulating agent, and the proportion of the heat insulating agent in the mixture ranges from 0.5wt% to 2wt%.

Preferably, the alignment layer is formed of polyimide material, and the alignment is achieved by rubbing.

Another technical solution provided by the present invention is: a method for preparing a display substrate. On the basis of the above method for preparing a polarizer, the method sequentially forms the alignment layer and the polarizer layer on the base plate to form a display substrate. .

Preferably, the base plate is an array base plate, and the formed display substrate is an array substrate; or, the base plate is a color filter base plate, and the formed display substrate is a color filter substrate.

Another technical solution provided by the present invention is: a method for preparing a liquid crystal display panel, including the following steps: forming an array substrate, and forming a lower polarizer on the light-incident side of the array substrate; forming a color filter substrate, and An upper polarizer is formed on the light-emitting side of the film substrate; the array substrate and the color filter substrate are boxed together, and liquid crystal is filled between the array substrate and the color filter substrate; the lower polarizer and/or the The above polarizer is formed by the method for preparing the above polarizer.

Another technical solution provided by the present invention is: a polarizer, including an alignment layer and a polarizing layer, and the polarizing layer is formed by a mixture including a dichroic dye, a UV-reactive liquid crystal, a curing agent and a solvent, wherein the The UV reactive liquid crystal can be oriented under the action of magnetic field force.

Preferably, the ratio of the dichroic dye in the mixture ranges from 0.5wt% to 5wt%; the ratio of the UV reactive liquid crystal in the mixture ranges from 90wt% to 98wt%; the The proportion of the curing agent in the mixture ranges from 1 wt% to 5 wt%.

Preferably, the dichroic dyes are anthraquinone dyes or azo dyes; the UV reactive liquid crystal is LC242 or RM257; the curing agent is a thermal curing agent or a photoinitiator, wherein the The photoinitiator adopts trimethylbenzoyl-diphenylphosphine oxide or ethyl trimethylbenzoylphenylphosphonate.

Preferably, the mixture further includes a heat insulating agent, and the proportion of the heat insulating agent in the mixture ranges from 0.5wt% to 2wt%.

Another technical solution provided by the present invention is: a display substrate, including a base plate and a polarizer, the base plate is an array base plate or a color filter base plate, and the polarizer is the above-mentioned polarizer.

Another technical solution provided by the present invention is: a liquid crystal display panel, including an array substrate and a color filter substrate arranged opposite to each other, and liquid crystal filled between the array substrate and the color filter substrate, and the array substrate A lower polarizer is arranged on the light incident side of the color filter substrate, and an upper polarizer is arranged on the light outlet side of the color filter substrate, and the lower polarizer and/or the upper polarizer are the aforementioned polarizers.

The polarizer provided by the invention and the preparation method thereof adopt a mixture comprising a dichroic dye and a UV reactive liquid crystal to form a polarizing layer, and the mixture is oriented in a uniform magnetic field, and the dichroic dye and the UV reactive liquid crystal In a uniform magnetic field, a consistent orientation direction can be obtained, the orientation effect is excellent, the light transmittance and polarization degree of the polarizer are significantly improved, and the yield rate of the product is at a high level. Applying the polarizer to a display device can significantly improve the display quality of the display device.

The display substrate, the liquid crystal display panel and the preparation method thereof provided by the present invention include the above-mentioned polarizer or the preparation method of the polarizer, so that the display substrate and the liquid crystal display panel have all the beneficial effects brought by the above-mentioned polarizer, so that the display substrate, the liquid crystal display panel Has a high display quality.

Description of drawings

Fig. 1 is the flowchart of the preparation method of the polarizer of embodiment 1;

Fig. 2 is the schematic diagram of forming alignment layer;

Fig. 3 is the schematic diagram that coats the mixture that forms polarizing layer on alignment layer;

Fig. 4 is a schematic diagram of the orientation of the mixture coated on the orientation layer;

Fig. 5 is a side view of the structure in Fig. 4;

FIG. 6 is a schematic diagram of a mixture coated on an alignment layer cured by UV light.

Wherein, reference sign is:

1. Carrier substrate; 2. Orientation layer; 3. Polarizing layer; 4. Solenoid; 5. UV light source.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example 1:

This embodiment provides a method for preparing a polarizer. The polarizer obtained by the preparation method has a good alignment effect, high light transmittance and polarization degree, and can significantly improve display quality.

The preparation method of the polarizer includes the steps of forming an alignment layer and a polarizer layer. Fig. 1 is the flow chart of the preparation method of the polarizer of the present embodiment, as shown in Fig. 1, this preparation method comprises the following steps:

S1: forming an alignment layer.

FIG. 2 is a schematic diagram of forming an alignment layer. As shown in FIG. 2, in this step, an alignment layer 2 is formed on a carrier substrate 1 in combination with an existing mature preparation process, and the alignment layer 2 is formed of a polyimide material. Orientation is obtained by rubbing. The specific preparation process is as follows: firstly, the polyimide material is coated on the carrier substrate 1, and dried; secondly, the upper surface of the polyimide material on the carrier substrate 1 is rubbed with a friction wheel, so that the upper surface of the material forms a direction Consistent elongated grooves, that is, orientation is obtained, thereby forming an orientation layer 2 on the carrier substrate 1 .

The following are the steps for forming a polarizing layer on the basis of the alignment layer:

S2: Coating a mixture on the alignment layer 2, the mixture includes a material that can be aligned under the action of a magnetic field force.

Fig. 3 is the schematic diagram that is coated on the alignment layer 2 to form the mixture of polarizing layer, as shown in Fig. 3, in this step, the mixture forming polarizing layer 3 comprises dichroic dye, UV (Ultra Violet) reactive type liquid crystal , curing agent and solvent. It has been tested and determined that the combination of the components according to the following ratio can make the formed polarizer have a better orientation effect and a higher degree of polarization and light transmittance, that is: the ratio range of the dichroic dye in the mixture 0.5wt% to 5wt% (wt% refers to the weight ratio); the proportion range of the UV reactive liquid crystal in the mixture is 90wt% to 98wt%; the proportion range of the curing agent in the mixture is 1wt% to 5wt%. In addition, in order to prevent heat curing of the mixture when it is not required to be cured during subsequent processing, the mixture also includes a heat-blocking agent, and the proportion of the heat-blocking agent in the mixture ranges from 0.5wt% to 2wt%.

Specifically, the dichroic dyes in the mixture are preferably anthraquinone dyes or azo dyes; currently on the market, UV reactive liquid crystals mainly include the RM (Reactive Mesogen) series of Merck (merck) such as: RM257 etc.; also have the Paliocolor series of BASF (BASF), such as: LC242, etc., the UV reactive liquid crystal is preferably LC242 or RM257, and the mixture of the above materials is low in cost and easy to obtain. The UV reactive liquid crystal is in a crystal state at normal temperature, but it can be dissolved into a liquid state when it is placed in a solvent, and the liquid crystal molecules are evenly distributed in the liquid state. The solvent here can be any one of cyclopentanone, acetone, propylene glycol methyl ether acetate, toluene, chloroform or their combination. In this way, the mixture as a whole is also in a liquid state, which can be conveniently used in the subsequent coating and orientation processes, and the above-mentioned UV-reactive liquid crystal can extend and align along the direction of the magnetic force under the action of the magnetic force, while the dichroic The dichroic dye is entrapped between the molecules of the UV reactive liquid crystal, and the dichroic dye is also aligned during the process of aligning the UV reactive liquid crystal.

S3: The mixture is oriented by a uniform magnetic field.

In this step, the orientation of the mixture coated on the orientation layer 2 is accomplished by a uniform magnetic field. Fig. 4 is a schematic diagram of the orientation of the mixture coated on the alignment layer 2, and Fig. 5 is a side view of the structure in Fig. 4, as shown in Fig. 4 and Fig. 5, the specific process is: put the alignment layer 2 coated with the mixture into the uniform magnetic field formed by the energized solenoid 4, and keep the orientation direction of the alignment layer 2 consistent with the direction of the magnetic force lines of the uniform magnetic field formed by the energized solenoid 4, so that under the action of the magnetic force lines, the UV reactive type The alignment direction of the liquid crystal is consistent with the alignment direction of the alignment layer 2 .

In order to make the energized solenoid 4 form a wide area and a stable uniform magnetic field, the cross-sectional shape of the preferred solenoid 4 is any one of square, rectangle, circle, and ellipse, as shown in Fig. 4 and Fig. 5 Take the solenoid 4 whose cross-sectional shape is a rectangle as an example, the solenoid 4 that is energized forms a uniform magnetic field inside it, and the direction of the magnetic force lines of the uniform magnetic field in Fig. The directions of the magnetic lines of force are indicated by the arrows. Put the alignment layer 2 coated with the mixture into a uniform magnetic field, and at the same time, keep the alignment direction of the alignment layer 2 consistent with the direction of the magnetic force lines of the uniform magnetic field, wherein the alignment direction of the alignment layer 2 is the friction during its production process. Direction, the direction of the magnetic force lines of the uniform magnetic field can be determined according to the direction of the current supply of the solenoid 4 and the winding direction of the coil, so that the orientation direction of the alignment layer 2 is consistent with the direction of the magnetic force lines of the uniform magnetic field, then the UV reactive liquid crystal in the mixture will be Under the action of the magnetic field force along the direction of the magnetic force line, therefore, the UV reactive liquid crystal will extend and align along the direction of the magnetic force line, that is, along the orientation direction of the alignment layer 2, and at the same time, the dichroic dye in the mixture will be entrapped in the UV reaction The same orientation as that of UV reactive liquid crystals will also be obtained between the liquid crystals of different types. Therefore, under the action of the magnetic field force, the mixture forming the polarizing layer can also obtain the orientation in the same direction.

In order to ensure that the alignment layer 2 coated with the mixture can be completely in a uniform magnetic field, the length H of the preferred solenoid 4 is more than twice the length h of the alignment layer, so as to obtain a larger uniform magnetic field range, so that the coated The alignment layer 2 covered with the mixture is placed in the middle of the solenoid 4 to ensure that it is completely in the uniform magnetic field and avoids being in the non-uniform magnetic field at both ends of the solenoid 4 .

In addition, in the magnetic field formed by the energized solenoid, the magnetic induction is: B=μnI; among them, μ is the vacuum permeability (constant); n is the number of coil turns; I is the current; the magnetic induction B and two Chromatic dyes and UV-responsive liquid crystals are proportional to the magnetic field force. Theoretically, the greater the current applied to the solenoid, the greater the magnetic field force on the UV-reactive liquid crystal, and accordingly, the better the orientation efficiency and alignment effect of the dichroic dye and UV-reactive liquid crystal. However, Comprehensively considering the impact of applying a large current on the production cost and the effect of the actual required orientation, it is preferred that the magnitude of the energized current to the solenoid be in the range of 1A to 100A to obtain a relatively good orientation effect and at the same time control the increase in production costs , and at the same time, in order to ensure the complete alignment of the dichroic dye and the UV-reactive liquid crystal, the electrification duration of the solenoid is preferably in the range of 0.5 s to 60 s.

Before performing the S3 step, in order to ensure that the UV-reactive liquid crystal is completely in a liquid crystal state, to have good fluidity, and to obtain a better orientation in a uniform magnetic field, it is preferable to firstly coat the alignment layer 2 of the mixture as a whole. Heating, heating the UV reactive liquid crystal in the mixture above its phase transition temperature to make it reach an isotropic state, then cooling the UV reactive liquid crystal to normal temperature and maintaining the liquid crystal state. Afterwards, put the coated mixture into a uniform magnetic field for orientation, which can further improve the orientation efficiency and orientation effect.

S4: curing the mixture to form a polarizing layer 3 .

In this embodiment, the polarizer is formed by UV light curing. Correspondingly, the curing agent is a photoinitiator, and the photoinitiator adopts trimethylbenzoyl-diphenylphosphine oxide or ethyl trimethylbenzoylphenylphosphonate; FIG. The schematic diagram of the coated mixture is shown in FIG. 6 . The process of curing the mixture to form a polarizing layer includes: irradiating the mixture with UV light emitted by a UV light source 5 , so that the photoinitiator cures the mixture to form a polarizing layer 3 . When the photoinitiator is irradiated with UV light, a polymerization reaction occurs to generate a cross-linked and cured compound, so that the mixture is cured, that is, a polarizer including the alignment layer 2 and the polarizer layer 3 is prepared.

In addition, in this embodiment, the polarizer can also be formed by thermal curing, and at the same time, in order to ensure the efficiency of thermal curing, no thermal blocking agent may be added to the mixture for forming the polarizing layer. Correspondingly, the curing agent is a thermal curing agent; the process of curing the mixture to form the polarizing layer includes: using thermal curing to cure the thermal curing agent to form the polarizing layer, wherein the thermal curing temperature ranges from 80°C to 400°C. When the above-mentioned thermal curing agent is heated, it also generates a cross-linked and cured compound, thereby curing the mixture.

In the preparation method of the polarizer provided in this example, a mixture containing a dichroic dye and a UV-reactive liquid crystal is used to make a polarizing layer in the polarizer, and a uniform magnetic field is used to align the UV-reactive liquid crystal. The dichroic dye will be mixed between the UV reactive liquid crystals to obtain the same orientation as the UV reactive liquid crystals, which can significantly improve the light transmittance and polarization degree of the polarizer, so that the product yield is at a high level.

This embodiment also provides a polarizer, which is the polarizer prepared by the above preparation method. The polarizer includes an alignment layer and a polarizing layer, wherein the material of the polarizing layer is a mixture including dichroic dyes, UV reactive liquid crystals, curing agents and solvents.

Specifically, the proportion of the dichroic dye in the mixture ranges from 0.5wt% to 5wt%; the proportion of the UV reactive liquid crystal in the mixture ranges from 90wt% to 98wt%; the proportion of the curing agent in the mixture ranges from 1wt% ~5wt%. The dichroic dyes are anthraquinone dyes or azo dyes; the UV reactive liquid crystals are LC242 or RM257; the curing agent is a thermal curing agent or a photoinitiator, wherein the photoinitiator is trimethylbenzoyl-di Phenylphosphine oxide or ethyl trimethylbenzoylphenylphosphonate.

In addition, the mixture may also include a heat-blocking agent, the proportion of the heat-blocking agent in the mixture ranges from 0.5wt% to 2wt%, and the heat-blocking agent can prevent the mixture from being cured when it is not required to be cured during subsequent processing.

The polarizer provided in this embodiment is formed by using dichroic dyes and UV-reactive liquid crystals, etc., which can increase the light transmittance and polarization degree of the polarizer, and the orientation of the UV-reactive liquid crystal can be completed by a uniform magnetic field. The dichroic dye in the product will be mixed between the UV reactive liquid crystals to obtain the same orientation as the UV reactive liquid crystals, the orientation effect is excellent, and the yield rate of the product is improved.

Example 2:

This embodiment provides a method for preparing a display substrate. In the method for preparing a display substrate, on the basis of the method for preparing a polarizer in Example 1, an alignment layer and a polarizing layer are sequentially formed on a base plate to form a display substrate.

The backplane mentioned here may be an array backplane or a color filter backplane. If an array backplane is used, the formed display substrate is an array substrate; if the backplane adopts a color film backplane, the formed display substrate is a color film substrate.

The preparation method of the above array substrate or the preparation method of the color filter substrate includes the preparation method of the polarizer in Example 1, so that the prepared array substrate or the polarizer in the color filter substrate has a consistent orientation and a higher transmittance. Correspondingly, the array substrate or color filter substrate obtains a better display effect.

This embodiment also provides a display substrate. The display substrate includes a base plate and a polarizer, and the base plate is an array base plate or a color filter base plate. The point is that the polarizer included in the display substrate is the polarizer in Embodiment 1, so that The display substrate has all the technical effects of the polarizer in Example 1 and has better display effects.

Example 3:

This embodiment provides a method for preparing a liquid crystal display panel. The method for preparing a liquid crystal display panel includes the following steps:

S1: forming an array substrate, and forming a lower polarizer on the light-incident side of the array substrate;

S2: forming a color filter substrate, and forming an upper polarizer on the light emitting side of the color filter substrate;

S3: Assembling the array substrate and the color filter substrate into boxes, and filling the liquid crystal between the array substrate and the color filter substrate;

Wherein, the lower polarizer in step S1 and/or the upper polarizer in step S2 is formed by the method for preparing the polarizer in Example 1.

It is easy to understand that there is no specific sequence requirement for the steps of forming the array substrate and the step of forming the color filter substrate in this method. The liquid crystal display panel prepared by the preparation method has all the technical effects of the polarizer in Example 1, and has better display effect.

This embodiment also provides a liquid crystal display panel. The liquid crystal display panel includes an array substrate and a color filter substrate arranged opposite to each other, and liquid crystals filled between the array substrate and the color filter substrate. The light-incident side of the array substrate is provided with For the lower polarizer, the upper polarizer is provided on the light emitting side of the color filter substrate. It is important that the lower polarizer and/or the upper polarizer are the polarizers in Example 1. The liquid crystal display panel has all the technical effects of the polarizer in Embodiment 1, and has better display effect.

It can be understood that, the above embodiments are only exemplary embodiments adopted for illustrating the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (20)

1. a kind of preparation method of polaroid includes the steps that forming oriented layer and polarizing layer, which is characterized in that formed described inclined Photosphere includes the following steps：

The application of mixture in the oriented layer, the mixture include the material that can be orientated under the force effect of magnetic field；

The mixture is orientated by uniform magnetic field；Including：

It is powered to forming magnetic field to solenoid, the orientation for being coated with the mixture is placed on the even of the solenoid formation In high-intensity magnetic field, and keep the magnetic line of force direction of the differently- oriented directivity and the uniform magnetic field of solenoid formation of the oriented layer Unanimously；

Wherein：The mixture includes dichroic dye, UV reactive liquid crystals, curing agent and solvent；The curing agent is light Initiator；

Cure the mixture, forms the polarizing layer；Including：

The mixture is irradiated using UV light, so that the photoinitiator is cured the mixture, forms the polarizing layer.

2. the preparation method of polaroid according to claim 1, which is characterized in that by uniform magnetic field to the mixing Before the step of object is orientated, further include：

The mixture is first heated to isotropic state, then the mixture is cooled to room temperature and keeps the UV anti- It is liquid crystal state to answer type liquid crystal.

3. the preparation method of polaroid according to claim 1, which is characterized in that the solenoidal cross sectional shape is just Any one of rectangular, rectangle, circle, ellipse.

4. the preparation method of polaroid according to claim 1, which is characterized in that the solenoidal length is at least institute State oriented layer length twice or more.

5. the preparation method of polaroid according to claim 1, which is characterized in that the solenoidal electrical current it is big Small range is 1A~100A.

6. the preparation method of polaroid according to claim 1, which is characterized in that the dichroic dye is described mixed It is 0.5wt%~5wt% to close the proportional region in object；Proportional region of the UV reactive liquid crystals in the mixture be 90wt%~98wt%；Proportional region of the curing agent in the mixture is 1wt%~5wt%.

7. the preparation method of polaroid according to claim 1, which is characterized in that

The dichroic dye is anthraquinone dyes or azo dyes；

The UV reactive liquid crystals are LC242 or RM257.

8. the preparation method of polaroid according to claim 1, which is characterized in that the photoinitiator uses trimethylbenzene Formoxyl-diphenyl phosphine oxide or trimethylbenzoyl phenyl phosphinic acid ethyl ester.

9. the preparation method of polaroid according to claim 1, which is characterized in that the curing agent is thermal curing agents；Institute The step of stating the solidification mixture, forming the polarizing layer, including：

In the way of heat cure, so that the thermal curing agents is cured the mixture, form the polarizing layer, wherein heat cure Ranging from 80 DEG C~400 DEG C of temperature.

10. according to the preparation method of any polaroid of claim 1~9, which is characterized in that the mixture further includes The exhausted agent of thermal resistance, proportional region of the exhausted agent of thermal resistance in the mixture are 0.5wt%~2wt%.

11. according to the preparation method of any polaroid of claim 1~9, which is characterized in that the oriented layer is using poly- Acid imide material is formed, and is orientated using friction mode.

12. a kind of preparation method of display base plate, which is characterized in that in the system of any polaroid of claim 1~11 On the basis of Preparation Method, the oriented layer and the polarizing layer are sequentially formed on bottom plate, form display base plate.

13. the preparation method of display base plate according to claim 12, which is characterized in that the bottom plate uses array bottom The display base plate of plate, formation is array substrate；Alternatively, the bottom plate is using color film bottom plate, the display base plate of formation For color membrane substrates.

14. a kind of preparation method of liquid crystal display panel, includes the following steps：

Array substrate is formed, and the incident side of the array substrate forms down polaroid；

Color membrane substrates are formed, and the light emission side of the color membrane substrates forms upper polaroid；

By the array substrate and the color membrane substrates to box, and the filling liquid between the array substrate and the color membrane substrates It is brilliant；

It is characterized in that,

The down polaroid and/or the upper polaroid use the preparation method of any polaroid of claim 1~11 It is formed.

15. a kind of polaroid, including oriented layer and polarizing layer, which is characterized in that it includes dichroism dye that the polarizing layer, which uses, The mixture of material, UV reactive liquid crystals, curing agent and solvent is formed, wherein the UV reactive liquid crystals can be in magnetic field force effect Lower orientation.

16. polaroid according to claim 15, which is characterized in that

Proportional region of the dichroic dye in the mixture is 0.5wt%~5wt%；

Proportional region of the UV reactive liquid crystals in the mixture is 90wt%~98wt%；

Proportional region of the curing agent in the mixture is 1wt%~5wt%.

17. polaroid according to claim 15, which is characterized in that

The dichroic dye is anthraquinone dyes or azo dyes；

The UV reactive liquid crystals are LC242 or RM257；

The curing agent is thermal curing agents or photoinitiator, wherein the photoinitiator uses trimethylbenzoy-dipheny Phosphine oxide or trimethylbenzoyl phenyl phosphinic acid ethyl ester.

18. polaroid according to claim 15, which is characterized in that the mixture further includes the exhausted agent of thermal resistance, the heat It is 0.5wt%~2wt% to block proportional region of the agent in the mixture.

19. a kind of display base plate, including bottom plate and polaroid, the bottom plate is array base plate or color film bottom plate, which is characterized in that The polaroid is any polaroid of claim 15~18.

20. a kind of liquid crystal display panel includes the array substrate that box is arranged and color membrane substrates, and is filled in the array base The incident side of liquid crystal between plate and the color membrane substrates, the array substrate is provided with down polaroid, the color membrane substrates Light emission side is provided with upper polaroid, which is characterized in that the down polaroid and/or the upper polaroid are claim 15~18 Any polaroid.