WO2017101216A1

WO2017101216A1 - Polarizer

Info

Publication number: WO2017101216A1
Application number: PCT/CN2016/074870
Authority: WO
Inventors: 邱韶华; 陈敏
Original assignee: 深圳市盛波光电科技有限公司
Priority date: 2015-12-18
Filing date: 2016-02-29
Publication date: 2017-06-22
Also published as: JP3214150U; TWM526079U; KR20170003755U; CN205427224U

Abstract

Disclosed is a quantum dot polarizer, relating to the field of display. The polarizer successively comprises a first protective film (3), a polarizing layer (5) and a quantum dot layer (7) from top to bottom, wherein the first protective film (3) is connected to the polarizing layer (5), and the polarizing layer (5) is connected to the quantum dot layer (7). By directly attaching a quantum dot layer to a polarizing layer, a layer of inner protective film can be reduced, so that not only can the thickness of a product be reduced, but also the cost can be reduced; and at the same time, uneven display possibly generated in the process of assembling a backlight source can also be reduced while realizing high colour gamut display.

Description

Polarizer

Technical field

The present invention relates to the field of display, and in particular to a polarizer.

Background technique

With the development of liquid crystal display LCD electronic products, consumers demand that products become thinner and thinner.

At present, the thickness of the overall product is mainly reduced by thinning the thickness of the electronic components in the electronic product, but the thickness of the thinning is limited because of the performance requirements of the electronic product itself.

In addition, modern consumers are increasingly demanding the color gamut and brightness of electronic products. In order to improve the color gamut of liquid crystal display LCD electronic products, the main way is to optimize the color filter of the backlight module or use quantum dot technology. Quantum dot technology is divided into two types. One is the use of quantum dot light-emitting diodes, but it is still in the laboratory development stage due to its longevity and difficulty in ensuring consistent color display. The other is to add a quantum dot film at the entrance of the backlight light guide.

A quantum dot film is added at the entrance of the backlight light guide plate, and the film is directly assembled with other backlight module components, and foreign matter is easily dropped during the assembly process, and is sandwiched in each component, and at the same time, the assembly process is performed by a human hand. Wearing gloves, the gloves easily leave marks on the diaphragm or scratch the diaphragm. In addition, the space is insufficient, the diaphragm is deformed by thermal expansion, and wrinkles or warpage occur, which will affect the display unevenness.

Summary of the invention

It is an object of the present invention to provide a polarizer which aims to improve the color gamut of a liquid crystal display and solve the problem of the thickness of the polarizer.

The present invention is achieved in that the polarizer comprises a first protective film, a polarizing layer and a quantum dot layer in order from top to bottom, and the first protective film is connected with the polarizing layer, and the polarizing layer is connected. Connected to the quantum dot layer. The quantum dot layer and the polarizing layer are directly bonded to each other to reduce the thickness of the inner protective film, thereby reducing the thickness of the product and reducing the cost. In addition, by directly bonding the quantum dot layer and the polarizing layer, high color gamut display can be realized, and display unevenness which may occur during backlight assembly can be reduced. The assembly operation of the quantum dot layer and the backlight module is in a dust-free environment, and is manually operated manually, and is assembled one by one, similar to assembling a television set and a computer display screen. The bonding of the quantum dot film and the polarizer is also in a dust-free environment, which is automated, roll-to-roll bonding, and then cut into pieces to complete the subsequent display process after production. By doing so, labor is saved, and the process of human operation and the quality problems that may result from it are also reduced.

According to a further technical solution of the present invention, the quantum dot layer is made of a quantum dot material coated on a substrate. In the prior art, the quantum dot layer is mainly composed of a quantum dot material interposed between two substrates, sandwiched between two substrates, and the quantum dot layer provided by the present invention directly coats the quantum dot material. On the substrate, this can reduce the two-layer film compared to the existing process. The material can reduce the thickness of the product and reduce the cost, and also can increase the color gamut and brightness of the polarizer.

According to a further technical solution of the present invention, an outer protective layer is further disposed outside the quantum dot layer, and the quantum dot layer is connected to the outer protective layer.

According to a further technical solution of the present invention, a release film is further disposed on the outer side of the first protective film, and the release film and the first protective film are connected by a pressure sensitive adhesive.

According to a further technical solution of the present invention, the first protective film and the polarizing layer are connected by a glue, and the polarizing layer and the quantum dot layer are connected by the glue, and the glue is polyvinyl alcohol. Water glue or UV glue.

According to a further technical solution of the present invention, the first protective film is a cellulose triacetate film, a polycycloolefin film, a polyethylene terephthalate film, a polymethyl methacrylate film or a polycarbonate film. One kind.

According to a further technical solution of the present invention, the substrate layer is a cellulose triacetate film, a polycycloolefin film, a polyethylene terephthalate film, a polymethyl methacrylate film or a polycarbonate film. One.

The beneficial effects of the invention are: directly bonding the quantum dot film and the polarizing layer to reduce the inner protective film, thereby reducing the thickness of the product and reducing the cost; at the same time, by bonding the quantum dot film and the polarizer, While enabling high color gamut display, it can also reduce display unevenness that may occur during backlight assembly.

Another object of the present invention is to provide a method of fabricating a polarizer, the method comprising the steps of:

A. dyeing and stretching the PVA material to obtain a polarizing layer;

B. The polarizing layer is bonded to the first protective film and the quantum dot layer by glue, dried, and wound.

A further technical solution of the present invention is that the step B further includes the following steps:

C. bonding the outer side of the first protective film to the release film coated with the PSA glue;

D. The outer side of the quantum dot layer is bonded to the outer protective film.

The invention has the beneficial effects that by directly bonding the quantum dot layer and the polarizing layer to reduce the inner protective film, the thickness of the product can be reduced, and the cost can be reduced. In addition, by directly bonding the quantum dot layer and the polarizing layer, high color gamut display can be realized, and display unevenness which may occur during backlight assembly can be reduced. The assembly operation of the quantum dot layer and the backlight module is in a dust-free environment, and is manually operated manually, and is assembled one by one, similar to assembling a television set and a computer display screen. The bonding of the quantum dot film and the polarizer is also in a dust-free environment, which is automated, roll-to-roll bonding, and then cut into pieces to complete the subsequent display process after production. By doing so, labor is saved, and the process of human operation and the quality problems that may result from it are also reduced.

DRAWINGS

1 is a schematic view of a polarizer provided by an embodiment of the present invention.

Reference numerals: 1-release film; 2-pressure-sensitive adhesive layer; 3-first protective film; 4, 6-adhesive layer; 5-polarized layer; 7-quantum dot layer; 8-out protective film.

Detailed ways

In the first embodiment, as shown in FIG. 1, 1 is a release film, and when it is bonded to the liquid crystal panel, the release film is peeled off.

2 is a pressure-sensitive adhesive layer. The adhesive layer used in this embodiment is a solvent-based pressure-sensitive adhesive layer, and other types of pressure-sensitive adhesives can also be used.

3 is the first protective film, mainly for supporting protection, because the PVA film is easy to absorb moisture and shrink. In recent years, as the development of the industry has become thinner, many membrane materials have begun to develop in a multi-functional direction, and other functions have been imparted to the protective film in this layer, such as optical compensation, scratch resistance, and anti-reflection. Etc. In order to achieve such multi-functionality, the means for performing functional coating treatment on the inner protective film surface or the functional component material in the film forming process of the inner protective film may be adopted. The material of the first protective film is mainly a film having excellent optical properties, and mainly includes a cellulose triacetate film, a polycycloolefin film, a polyethylene terephthalate film, a polymethyl methacrylate film or a polycarbonate film. Wait. The first protective film can also be selected from optically compensated films depending on the application of the specific product.

4 and 6 are adhesive layers, and PVA water gel or UV glue layer is used in this embodiment. The first protective film and the polarizing layer are bonded together by an adhesive layer, and the quantum dot layer is bonded to the polarizing layer through the adhesive layer.

5 is a polarizing layer. In this embodiment, it is a PVA film layer, and mainly functions to generate polarized light.

7 is a quantum dot layer mainly in a film having excellent optical properties, such as a cellulose triacetate film, a polycycloolefin film, a polyethylene terephthalate film, a polymethyl methacrylate film or a polycarbonate film. It is made of a quantum dot material, and the above-mentioned cellulose triacetate film, polycycloolefin film, polyethylene terephthalate film, polymethyl methacrylate film or polycarbonate film are excellent in optical properties. The membrane is the substrate.

8 is an outer protective film, mainly for the protection of the process, it needs to be torn off after bonding with the panel.

The quantum dot layer and the polarizing layer are directly bonded to each other to reduce the thickness of the inner protective film, thereby reducing the thickness of the product and reducing the cost. In addition, by directly bonding the quantum dot layer and the polarizing layer, high color gamut display can be realized, and display unevenness which may occur during backlight assembly can be reduced. The assembly operation of the quantum dot layer and the backlight module is in a dust-free environment, and is manually operated manually, and is assembled one by one, similar to assembling a television set and a computer display screen. The bonding of the quantum dot film and the polarizer is also in a dust-free environment, which is automated, roll-to-roll bonding, and then cut into pieces to complete the subsequent display process after production. By doing so, labor is saved, and the process of human operation and the quality problems that may result from it are also reduced.

In the prior art, the quantum dot layer is mainly composed of a quantum dot material interposed between two substrates, sandwiched between two substrates, and the quantum dot layer provided by the present invention is a quantum dot material. It is directly applied to the substrate, so that the two-layer film can be reduced compared with the existing process, which can reduce the thickness of the product and reduce the cost, and can also increase the color gamut and brightness of the polarizer.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.