WO2021036743A1

WO2021036743A1 - Polarizer and fabrication method, and display assembly and terminal

Info

Publication number: WO2021036743A1
Application number: PCT/CN2020/107767
Authority: WO
Inventors: 黄治斌; 韦宏阳
Original assignee: 维沃移动通信有限公司
Priority date: 2019-08-28
Filing date: 2020-08-07
Publication date: 2021-03-04
Also published as: CN110568542A

Abstract

Provided are a polarizer and fabrication method, and a display assembly and a terminal; the polarizer comprises: a polarizing film (10), the polarizing film (10) having a light-transmissive region (11); first protective films (20), arranged on the two sides of the polarizing film (10).

Description

Polarizer and preparation method, display assembly and terminal

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 201910802452.4 filed in China on August 28, 2019, the entire content of which is incorporated herein by reference.

Technical field

The present disclosure relates to the field of polarizers, in particular to a polarizer, a preparation method, a display assembly and a terminal.

Background technique

In the application process of the polarizer, when the polarizer is applied to a display panel with openings, it is necessary to make openings on the polarizer to match the openings on the display panel. As shown in Fig. 1, in the related art, the formed polarizer 2 is punched and opened, so that the openings on the polarizer 2 correspond to the openings 6 on the display panel 1. During the bonding process of the film 2 and the cover plate 4, the polarizer 2 and the cover plate 4 are bonded through the OCA optical adhesive layer 3, and the openings of the polarizer 2 are filled with OCA (Optically Clear Adhesive) optical adhesive. The opening position of the film is not flat, and bubbles 7 are prone to appear during the filling process, which affects the bonding effect, increases the bonding difficulty, and affects the yield.

Summary of the invention

In view of this, the present disclosure provides a polarizer and a preparation method, a display assembly, and a terminal, which are used to solve the problem of uneven opening positions when punching and opening the formed polarizer. OCA optical glue is used to open the polarizer. Bubbles are easy to appear during the filling process of the hole, which affects the bonding effect and is inconvenient for bonding.

In order to solve the above technical problems, the present disclosure adopts the following technical solutions:

In the first aspect, the polarizer according to the embodiment of the present disclosure is applied to a display panel with openings, and the polarizer includes:

A polarizing film, the polarizing film has a light-transmitting area;

The first protective film is respectively arranged on both sides of the polarizing film.

Further, the polarizing film in the light-transmitting area is transparent; or, the light-transmitting area is a hollow area.

Further, the polarizer further includes:

A transparent adhesive layer provided on the first protective film on one side of the polarizing film;

The release film is arranged on the side of the transparent adhesive layer away from the polarizing film;

The second protective film is provided on the first protective film on the other side of the polarizing film.

In the second aspect, the display assembly according to the embodiment of the present disclosure includes:

A display panel, the display panel is provided with an opening;

The polarizer as described in the above embodiment is arranged on the display panel.

Further, the display component also includes:

The cover plate is arranged on the side of the polarizer away from the display panel.

In the third aspect, a terminal according to an embodiment of the present disclosure includes the display component described in the foregoing embodiment.

In a fourth aspect, according to the preparation method of the polarizer of the embodiment of the present disclosure, the preparation method includes the following steps:

Forming a polarizing film, and setting a light-transmitting area on the polarizing film;

First protective films are respectively formed on both sides of the polarizing film.

Further, the forming of the polarizing film includes:

Providing a substrate to shield the first area on the substrate;

Dyeing the substrate;

After the dyeing is completed, the shielding of the first area is removed to form the polarizing film, and the first area of the polarizing film is transparent to form the light-transmitting area.

Further, the forming of the polarizing film includes:

Dyeing the substrate used to form the polarizing film;

Shielding a second area on the substrate, where the second area is an area other than the first area on the substrate;

Decoloring the first area that is not blocked to form the polarizing film, and the first area of the polarizing film is transparent to form the light-transmitting area;

Remove the shielding of the second area.

Further, the shielding the second area on the substrate includes:

Dyeing the substrate used to form the polarizing film;

Forming a light-shielding film on the dyed substrate;

The light-shielding film is exposed and developed to form a light-shielding pattern, and the light-shielding pattern shields the second area of the substrate.

Further, the forming of the polarizing film includes:

Before forming the first protective film on both sides of the polarizing film, a hollow area is formed on the polarizing film.

The above technical solutions of the present disclosure have at least the following beneficial effects:

According to the polarizer of the present disclosure, a light-transmitting area is provided on the polarizing film, and when the polarizer with the light-transmitting area is applied to a display panel with openings, there is no need to punch and open the formed polarizer. During the bonding process of the film and the cover plate, there is no need to use OCA optical glue to fill the openings of the polarizer, which reduces the process and avoids the problem of uneven openings of the polarizer and easy air bubbles during the filling process. Facilitate the bonding, improve the bonding effect of the polarizer and the cover plate, and improve the bonding yield.

Description of the drawings

FIG. 1 is a schematic diagram of cooperation between a polarizer and a display panel in the related art;

2 is a schematic diagram of a structure of a polarizer according to an embodiment of the disclosure;

FIG. 3 is a schematic diagram of a structure of a display assembly according to an embodiment of the disclosure;

FIG. 4 is another schematic diagram of the structure of the display assembly of the embodiment of the disclosure;

Fig. 5a is a schematic diagram of the first area on the substrate;

FIG. 5b is a schematic diagram of the first area in FIG. 5a after a light-transmitting area is formed;

Figure 6a is a schematic diagram after forming a dye layer and a light-shielding film on a substrate;

Fig. 6b is a schematic diagram of the structure in Fig. 6a after exposure;

Figure 6c is a schematic diagram of the structure in Figure 6b after being developed;

Fig. 6d is a schematic diagram of the structure in Fig. 6c after decoloring to form a light-transmitting area.

Reference number

Polarizing film 10; light-transmitting area 11; base material 12; first area 13;

Second area 14; dyeing layer 15; shading film 16;

The first protective film 20;

Cover 30;

Transparent adhesive layer 40;

Release film 50;

The second protective film 60; the display panel 70.

detailed description

In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art fall within the protection scope of the present disclosure.

Hereinafter, the polarizer according to the embodiment of the present disclosure will be described in detail with reference to the drawings.

As shown in FIG. 2, the polarizer according to the embodiment of the present disclosure can be applied to a display panel with openings. The polarizer includes: a polarizing film 10, the polarizing film 10 has a light-transmitting area 11, and the light-transmitting area 11 can be connected to the display panel. The opening positions on the panel correspond; the first protective film 20 is respectively arranged on both sides of the polarizing film 10.

That is, the polarizer is mainly composed of the polarizing film 10 and the first protective film 20, and the position on the polarizing film 10 corresponding to the position of the opening on the display panel may have a light-transmitting area 11 to pass through the light-transmitting area 11. To ensure light transmittance, a first protective film 20 may be provided on both sides of the polarizing film 10, and the polarizing film 10 can be supported and protected by the first protective film 20 to prevent the polarizing film 10 from being damaged. The polarizing film 10 may be a polyvinyl alcohol (PVA) film, and the first protective film 20 may be a triacetate cellulose (TAC) film, which can support and protect the PVA film to ensure that the extended PVA film will not shrink; Since polyvinyl alcohol is easily hydrolyzed, in order to protect the polarizing film, a layer of TAC film with high light transmittance and good water resistance can be laminated on both sides of the PVA film.

By providing the light-transmitting area 11 corresponding to the position of the opening of the display panel on the polarizing film 10, the polarizing film 10 having the light-transmitting area 11 is applied to a display panel with openings (for example, a tablet, a mobile phone, or a computer monitor) When the polarizer is formed, there is no need to punch and open the hole of the polarizer. During the bonding process of the polarizer and the cover plate, there is no need to use OCA optical glue to fill the opening of the polarizer, reducing the process and avoiding the polarization. The opening position of the film is not flat and the problem of bubbles easily occurs during the filling process, which is convenient for bonding, improves the bonding effect of the polarizer and the cover plate, and improves the bonding yield.

According to different application requirements, a certain thickness of pressure sensitive adhesive (PSA) can be coated on one side of the polarizer, and a release film that protects the pressure sensitive adhesive can be laminated, and the other side of the polarizer can be based on the product type And it is necessary to compound different types of film layers (for example, protective film, release film, etc.) to form a finished polarizer.

In the embodiment of the present disclosure, as shown in FIGS. 3 and 4, the polarizer may further include a transparent adhesive layer 40, a release film 50, and a second protective film 60, wherein the transparent adhesive layer 40 is a transparent material layer , The transparent adhesive layer 40 can be provided on the first protective film 20 on one side of the polarizing film 10, and the release film 50 can be provided on the side of the transparent adhesive layer 40 away from the polarizing film 10, and the release film 50 can protect The transparent adhesive layer 40, the second protective film 60 may be provided on the first protective film 20 on the other side of the polarizing film 10, and the second protective film 60 may protect the polarizing film 10 from external force damage.

In some embodiments of the present disclosure, as shown in FIGS. 3 and 4, a transparent adhesive layer 40 may be provided on the first protective film 20 on at least one side of the polarizing film 10, and the transparent adhesive layer 40 may be a sensation. Laminating, good transparency, for example, a transparent adhesive layer 40 is provided on the first protective film 20 on one side of the polarizing film 10, and a second protective film 20 on the other side of the polarizing film 10 The protective film 60 protects the polarizing film 10 from external force damage by the second protective film 60. A release film 50 can be provided on the side of the transparent adhesive layer 40 away from the polarizing film 10, and the release film 50 can be a polyethylene terephthalate (PET) film. The PET film has high strength, is not easily deformed, and is transparent. It has good performance and high surface flatness. Before the polarizer is attached to the LCD (Liquid Crystal Display, liquid crystal display), it can protect the pressure-sensitive adhesive layer from damage and avoid the generation of adhesive bubbles.

In other embodiments of the present disclosure, a reflective film may be provided on the side of the transparent adhesive layer 40 away from the first protective film 20. The side of the transparent adhesive layer 40 away from the first protective film 20 may be provided with a retardation film, and a release film 50 may also be provided on the side of the retardation film away from the first protective film through an adhesive layer.

In the embodiment of the present disclosure, the polarizing film in the light-transmitting area 11 can be transparent, without opening holes, and no need to use OCA optical glue to fill the openings of the polarizer, reducing the number of processes and avoiding the opening of the polarizer. The location is uneven and bubbles are prone to occur during the filling process. Alternatively, the light-transmitting area 11 is a hollow-out area, and the light-transmitting area 11 can be arranged in a through hole shape, and the first protective film 20 is respectively arranged on both sides of the polarizing film 10. Although the light-transmitting area 11 is a hollow area, the The first protective film 20 provided on both sides of the film 10 can seal the hollow area, and the position corresponding to the hollow area on the polarizer is not penetrated. During the bonding process of the polarizer and the cover plate, there is no need to use OCA optical glue to open the polarizer. The hole is filled to avoid the problems of uneven opening of the polarizer and bubbles in the filling process.

The embodiment of the present disclosure also provides a display assembly. As shown in FIG. 3 and FIG. 4, the display assembly includes a display panel 70 and the polarizer in the above-mentioned embodiment, wherein the display panel 70 is provided with an opening 71, and the polarizer is arranged On the display panel 70, a polarizer may be disposed on one side of the display panel 70, and the light-transmitting area 11 on the polarizer corresponds to the opening 71 on the display panel 70. Since the light-transmitting area 11 corresponding to the position of the opening of the display panel 70 is provided on the polarizing film, when the polarizer with the light-transmitting area is applied to the display panel with the opening, it is not necessary to perform the forming of the polarizer. Punching and opening holes for bonding the polarizer to the display and the display panel improves the bonding yield.

In some embodiments of the present disclosure, as shown in FIGS. 3 and 4, the display assembly may further include a cover plate 30. The cover plate 30 may be provided on the side of the polarizer away from the display panel 70. The cover plate 30 and the polarizer plate One side can be bonded by a layer 32 of OCA optical glue (such as polyurethane, silicone rubber, acrylic resin, unsaturated polyester or epoxy resin), and the polarizer with the light-transmitting area is applied to the display panel with openings When the polarizer is formed, there is no need to punch and open the hole of the polarizer. In the process of attaching the polarizer to the cover plate, there is no need to use OCA optical glue to fill the openings of the polarizer. When using OCA optical glue, When connecting the cover plate 30 and the polarizer, a thinner OCA optical adhesive layer can be used to reduce the process, avoid the uneven opening position of the polarizer and the problem of bubbles during the filling process, facilitate the bonding, and improve the polarizer and the polarizer. The fit effect of the cover.

The embodiments of the present disclosure also provide a terminal. The terminal includes the display component in the above-mentioned embodiment. A terminal having the display component in the above-mentioned embodiment can improve the assembly quality of the terminal and increase the yield rate.

The embodiments of the present disclosure also provide a method for preparing a polarizer. The polarizer may be applied to a display panel with openings. The method for preparing the polarizer may include the following steps:

The polarizing film 10 is formed, and a light-transmitting area 11 is provided on the polarizing film 10, and the light-transmitting area 11 may correspond to the position of the opening; the first protective film 20 may be formed on both sides of the polarizing film 10, respectively. For the polarizer prepared by the above method, the light-transmitting area 11 corresponding to the position of the opening of the display panel can be provided on the polarizing film 10, and then the first protective film 20 is formed on both sides of the polarizing film 10 to support and protect the polarized light. For the film 10, when the polarizer is large and divided into small pieces, there is no need to punch through small holes, which reduces one punching process. When the polarizer prepared by the above method is applied to a display panel with openings, during the process of attaching the polarizer to the cover plate, there is no need to use OCA optical glue to fill the openings of the polarizer, reducing the number of processes and avoiding The opening position of the polarizer is uneven and bubbles are prone to occur during the filling process, which is convenient for bonding and improves the bonding effect of the polarizer and the cover plate.

In some embodiments of the present disclosure, the forming of the polarizing film may include:

Provide a substrate 12 to shield the first area 13 on the substrate 12, for example, before dyeing the substrate 12 for forming a polarizing film, as shown in FIG. The first region 13 corresponding to the position of the hole is shielded, and the substrate 12 can be a PVA material film; the substrate 12 is dyed; after the dyeing is completed, the shielding of the first region 13 is removed to form a polarizing film 10, as shown in Figure 5b As shown, the first area 13 of the polarizing film 10 is transparent to form a light-transmitting area 11. By shielding the first area 13 during the dyeing process so that the first area 13 is not dyed, the first area 13 of the polarizing film 10 is transparent to form a light-transmitting area. Light zone 11 does not require openings. During the process of attaching the polarizer to the cover plate, there is no need to use OCA optical glue to fill the openings of the polarizer, reducing the number of processes and avoiding uneven openings of the polarizer. As well as the problem of bubbles prone to occur during the filling process, the non-opening polarizer is fully compatible with the bonding process in the related technology, and is convenient for bonding.

The polarizer manufacturing process in the related technology generally includes the following steps: selecting PVA film material → washing → swelling → dyeing → washing → stretching → color correction → drying → attaching TAC film. In combination with the manufacturing process in the related art, the method in the embodiments of the present disclosure can be used in actual application process, after the incoming PVA film is washed with water and before dyeing, through related calculations such as the stretch rate of the film, and the The position of the opening corresponds to the first area 13 to be occluded. For example, the occlusion can be performed before the swelling. After the dyeing is completed, the occlusion of the first region 13 can be removed. For example, the occlusion can be removed after the complementary color is completed, and then performed The TAC film is dried and pasted to make the first area 13 of the polarizing film 10 transparent to form the light-transmitting area 11.

In other embodiments of the present disclosure, the forming of the polarizing film may include the following steps:

Dye the substrate 12 used to form the polarizing film 10; mask the second area 14 on the substrate 12, which is the other area on the substrate 12 other than the first area 13; The first area 13 of the polarizing film can be decolorized. For example, it can be decolorized by a solvent after exposure and development to form the polarizing film 10. The first area 13 of the polarizing film 10 is transparent to form the light-transmitting area 11; Occlude. That is, the substrate 12 is dyed first, the other areas on the substrate 12 except the first area 13 are shielded, and the unshielded first area 13 is decolorized, so that the polarizing film 10 is A region 13 is transparent to form a light-transmitting region 11, a polarizing film 10 with a light-transmitting region 11 is formed, the second region 14 is removed, and the light-transmitting region is prepared by first dyeing and then decoloring the first region The polarizing film 10 of 11, the process is simple, the prepared polarizer does not need to be opened, and the opening of the polarizer does not need to be filled with optical glue during the bonding process of the polarizer and the cover plate, which avoids the opening of the polarizer. The uneven position of the hole and the problem of bubbles are prone to occur during the filling process, which reduces the process and facilitates the bonding.

In the embodiment of the present disclosure, the shielding of the second area 14 on the substrate 12 may include:

As shown in FIGS. 6a and 6b, the substrate 12 used to form the polarizing film 10 is dyed. After dyeing, a dyed layer 15 can be formed on the substrate 12; a light-shielding film 16 is formed on the dyed substrate 12, That is, the light-shielding film 16 is formed on the dyeing layer 15; the light-shielding film 16 is exposed and developed, as shown in Figs. 6b to 6c, the first area 13 on the substrate 12 can be exposed and developed. After the exposure and development, The color particles in the exposed area can be removed by a solvent (such as ethanol) to form a light-shielding pattern. The light-shielding pattern shields the second region 14 of the substrate 12, as shown in FIG. 6d, the unshielded first region 13 is decolorized to form a transparent Light zone 11.

In the actual application process, after the PVA color correction, the corresponding opening position can be blocked by calculation, and the unblocked position can be removed with a solution (such as ethanol solution) to remove the dyed color particles to achieve transparency. For example, the following process can be used Proceeding: dyeing the base material→exposing→developing→removing the color particles from the solution→releasing the film. After the film is removed, the exposed position becomes transparent because the color particles are removed by the solution.

In some embodiments of the present disclosure, the forming of the polarizing film may include: forming a hollow area on the polarizing film 10 before forming the first protective film 20 on both sides of the polarizing film 10, and the hollow area may be separated from the opening on the display panel. The position of the hole corresponds. Before forming the first protective film 20 on both sides of the polarizing film 10, a hollow area is formed on the polarizing film 10, and then the first protective film 20 is formed. The hollow area can be sealed by the first protective film 20 so that the polarizing film and The corresponding position of the hollow area is not penetrated, which is convenient for processing. In the process of attaching the polarizer and the cover plate, there is no need to use optical glue to fill the openings of the polarizer, which avoids the problems of uneven opening positions of the polarizer and bubbles in the filling process, and reduces the process.

Unless otherwise defined, the technical or scientific terms used in the present disclosure shall have the usual meanings understood by those with ordinary skills in the field to which this disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components.

The above are optional implementations of the present disclosure. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the present disclosure, several improvements and modifications can be made. These improvements and Retouching should also be regarded as the protection scope of this disclosure.

Claims

A polarizer, including:

A polarizing film, the polarizing film has a light-transmitting area;

The first protective film is respectively arranged on both sides of the polarizing film.
The polarizer according to claim 1, wherein the polarizing film of the light-transmitting area is transparent; or, the light-transmitting area is a hollow area.
The polarizer according to claim 1, further comprising:

A transparent adhesive layer provided on the first protective film on one side of the polarizing film;

The release film is arranged on the side of the transparent adhesive layer away from the polarizing film;

The second protective film is provided on the first protective film on the other side of the polarizing film.
A display component including:

A display panel, the display panel is provided with an opening;

The polarizer according to any one of claims 1 to 3 arranged on the display panel.
The display assembly according to claim 4, further comprising:

The cover plate is arranged on the side of the polarizer away from the display panel.
A terminal comprising the display component according to any one of claims 4-5.
A preparation method of a polarizer includes the following steps:

Forming a polarizing film, and setting a light-transmitting area on the polarizing film;

First protective films are respectively formed on both sides of the polarizing film.
8. The manufacturing method according to claim 7, wherein the forming of the polarizing film comprises:

Providing a substrate to shield the first area on the substrate;

Dyeing the substrate;

After the dyeing is completed, the shielding of the first area is removed to form the polarizing film, and the first area of the polarizing film is transparent to form the light-transmitting area.
8. The manufacturing method according to claim 7, wherein said forming a polarizing film comprises:

Dyeing the substrate used to form the polarizing film;

Shielding a second area on the substrate, where the second area is an area other than the first area on the substrate;

Decoloring the first area that is not blocked to form the polarizing film, and the first area of the polarizing film is transparent to form the light-transmitting area;

Remove the shielding of the second area.
The preparation method according to claim 9, wherein the shielding the second area on the substrate comprises:

Dyeing the substrate used to form the polarizing film;

Forming a light-shielding film on the dyed substrate;

The light-shielding film is exposed and developed to form a light-shielding pattern, and the light-shielding pattern shields the second area of the substrate.
8. The manufacturing method according to claim 7, wherein the forming of the polarizing film comprises:

Before forming the first protective film on both sides of the polarizing film, a hollow area is formed on the polarizing film.