CN117806066A - Polarizer structure, display panel, manufacturing method of display panel and display device - Google Patents

Abstract

The invention provides a polaroid structure, which comprises the following components: a polarizing layer; and the adhesive layer is used for directly bonding the polarizing layer to at least one surface of the display substrate. The polaroid structure disclosed by the invention has smaller thickness and is not easy to bend when being applied to large-size display products, so that the risk of light leakage is reduced, the high transmittance and the high contrast can be realized, and the competitiveness of the display products is greatly improved.

Description

Polarizer structure, display panel, manufacturing method of display panel and display device

Technical Field

The invention relates to the technical field of display equipment, in particular to a polaroid structure, a display panel, a manufacturing method of the display panel and a display device.

Background

At present, LCD display is a novel and high-tech important display device, and has been widely applied in the fields of mobile phones, displays, televisions, public displays and the like. The LCD display is mainly realized by attaching polarizers to upper and lower substrates of a liquid crystal panel after the upper and lower substrates are aligned and cut, respectively, however, since a PVA (Polyvinyl Alcohol ) layer, which is a core part in the polarizers, is very thin, the absorption of water is very large, and bending is very easy.

Among products on the market, small-size products have smaller bending risks due to small size, so that the light leakage risk is reduced; however, the large-size product is limited by uniformity and productivity, so that the polarizer has a large bending risk, and the light leakage problem caused by the bending of the polarizer frequently occurs. A transparent substrate such as a TAC (Tri-cellulose Acetate, cellulose triacetate) layer and/or a PET (Polyethylene Glycol Terephthalate, polyethylene terephthalate) layer and/or a COP (Cyclo Olefin Polymer, cyclic olefin polymer) layer and/or a PMMA (Polymethyl Methacrylate ) layer is usually added on top of the PVA layer. However, this not only increases the thickness of the polarizer, but also increases the risk of delamination from layer to layer due to the need for bonding between the layers of film by glue.

Therefore, a new design solution is needed to solve the above-mentioned problems.

Disclosure of Invention

The present invention provides a polarizer structure, a display panel, a method for manufacturing the same, and a display device, so as to at least solve the above-mentioned problems.

The invention provides a polaroid structure, which comprises the following components: a polarizing layer; and the adhesive layer is used for directly bonding the polarizing layer to at least one surface of the display substrate.

In an embodiment, further comprising: the support layer is arranged on the surface, far away from the display substrate, of the polarizing layer.

In one embodiment, the thickness of the glue layer is 5 μm to 40 μm.

In one embodiment, the thickness of the glue layer is 8 μm to 12 μm.

The present invention provides a display panel, comprising: a display substrate; and the polarizer structure.

In one embodiment, a display substrate includes: a first substrate and a second substrate that are mutually aligned; the polarizing layer includes: the first polarizing layer is arranged on the first surface of the first substrate far away from the second substrate; the second polarizing layer is arranged on the second surface of the second substrate far away from the first substrate; an included angle is formed between the polarization direction of the first polarized light layer to the light and the polarization direction of the second polarized light layer to the light, so that the transmittance of the display substrate to the light is minimum relative to other included angles.

The invention provides a display device which comprises the display panel.

The invention provides a manufacturing method of a display panel, which comprises the following steps: providing a display substrate; forming a glue layer on at least one surface of the display substrate; and forming a polarizing layer directly on the adhesive layer.

In one embodiment, forming the polarizing layer directly on the glue layer includes: stretching the polarized material film layer, attaching the stretched polarized material film layer on the adhesive layer, and curing the stretched polarized material film layer on the adhesive layer by heating or irradiation of UV light to form a polarized layer; or coating the polarized material solution on the adhesive layer, and curing the coated polarized material solution on the adhesive layer by heating or irradiation with UV light to form the polarized layer.

In an embodiment, further comprising: and forming a supporting layer on the surface of the polarizing layer, which is far away from the display substrate.

In an embodiment, further comprising: providing a first substrate and a second substrate, and aligning the first substrate and the second substrate; forming a first adhesive layer on the first surface of the first substrate far away from the second substrate, forming a first polarizing layer on the first adhesive layer, forming a second adhesive layer on the second surface of the second substrate far away from the first substrate, and forming a second polarizing layer on the second adhesive layer; an included angle is formed between the polarization direction of the first polarized light layer to the light and the polarization direction of the second polarized light layer to the light, so that the transmittance of the display substrate to the light is minimum relative to other included angles.

The polaroid structure disclosed by the invention has smaller thickness and is not easy to bend when being applied to large-size display products, so that the risk of light leakage is reduced, the high transmittance and the high contrast can be realized, and the competitiveness of the display products is greatly improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a undue limitation on the invention, wherein:

FIG. 1 is a schematic diagram of a polarizer according to an embodiment of the related art;

FIG. 2 is a schematic structural design of a polarizer according to an embodiment of the present application;

fig. 3 is a schematic view of a process of forming a PVA layer on a glass substrate according to an embodiment of the present application.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 1, in the related art, it is necessary to form a polarizing layer on a display substrate, first, to form a relatively thick PSA (Pressure Sensitive Adhesive ) layer on the display substrate, for example, to a thickness of 25 μm, then to form a PMMA layer and/or TAC layer on the PSA layer as a support layer, for example, to a thickness of 60 μm, 40 μm, to a thickness of 40 μm, then to form a PVA layer on the PMMA/TAC layer, for example, to a thickness of 20 μm, 17 μm or 10 μm, and finally to form an interlayer adhesive, for example, to a thickness of 10 μm, on the PVA layer, and to form a PET layer, PMMA layer and/or TAC layer on the interlayer adhesive as another support layer, to a thickness of 80 μm, to a thickness of 60 μm, 40 μm, and to a thickness of 40 μm, for example.

As can be seen from fig. 1, the thickness of the polarizer is significantly very thick, which causes the polarizer to be easily bent, thereby causing the problem of light leakage, and the excessively thick polarizer also easily causes delamination between layers, so that the display effect is greatly deteriorated.

Referring to fig. 2, the present embodiment provides a polarizer structure, including: a polarizing layer 10; and an adhesive layer 20 for directly adhering the polarizing layer 10 to at least one surface of the display substrate.

Wherein, the material of the polarizing layer may include PVA, dichroic organic dye, etc.; the material of the adhesive layer may include PSA, etc., and the thickness of the adhesive layer may be 5 μm to 40 μm, for example, 8 μm to 12 μm, specifically 10 μm, 25 μm, etc., which is not particularly limited in this application.

For example, the thickness of the PVA layer may be, for example, 20 μm, 17 μm, 10 μm, or the like, which is not particularly limited in the present application; the thickness of the PSA layer may be, for example, 10 μm, which can be significantly reduced relative to the PSA layer of fig. 1 since only the PVA layer needs to be adhered.

In the polarizer structure of this embodiment, the polarizing layer is directly adhered to the surface of the display substrate, no TAC (Tri-cellulose Acetate, cellulose triacetate) layer and/or PET (Polyethylene Glycol Terephthalate, polyethylene terephthalate) layer and/or COP (Cyclo Olefin Polymer, cyclic olefin polymer) layer and/or PMMA (Polymethyl Methacrylate ) layer are provided between the polarizing layer and the display substrate, so that the thickness of the polarizer structure can be greatly reduced, the risk of bending the polarizer and the light leakage risk caused by bending the polarizer can be reduced, the number of film layers can be reduced, the thickness of the adhesive layer can be reduced, and the interlayer peeling phenomenon of the thinner polarizer is not easy to occur, which is beneficial to ensuring the display effect and improving the product competitiveness.

In an embodiment, the polarizer structure of the present embodiment may further include: the supporting layer 30 is disposed on a surface of the polarizing layer 10 away from the display substrate.

In the present embodiment, the support layer 30 may be adhered to the surface of the polarizing layer, which is remote from the display substrate, through the interlayer adhesive 40. Wherein the material of the support layer may comprise at least one of: TAC (Tri-cellulose Acetate, cellulose triacetate), PET (Polyethylene Glycol Terephthalate, polyethylene terephthalate), COP (Cyclo Olefin Polymer, cyclic olefin polymer) and PMMA (Polymethyl Methacrylate ) layers. The thickness of the PET layer may be, for example, 80 μm, the thickness of the PMMA layer may be, for example, 60 μm, 40 μm, the thickness of the TAC layer may be, for example, 40 μm, the thickness of the interlayer adhesive may be, for example, 10 μm, and the interlayer adhesive may include, for example, OCA (Optically Clear Adhesive) optical adhesive, which is not particularly limited in this application.

In the polarizer structure of this embodiment, the supporting layer is disposed on the outer layer of the polarizing layer far away from the display substrate, so that the polarizing layer is prevented from being bent due to water absorption, and meanwhile, a certain supporting effect can be achieved on the polarizing layer, and water absorption of the polarizing layer is further avoided.

The polarizer structure of the embodiment has smaller thickness, is not easy to bend when being applied to large-size display products, thereby being beneficial to reducing the light leakage risk, and simultaneously has high transmittance and high contrast, and greatly improves the competitiveness of the display products.

The present embodiment provides a display panel, which may include: a display substrate; and the polarizer structure.

In this embodiment, the display substrate may include a color film substrate, an array substrate, and the like. In the case that the display substrate is a color film substrate or an array substrate, the polarizer structure may be disposed on only one surface according to needs. The display panel may include an LCD (Liquid Crystal Display ) display panel, and may include a TN (Twisted Nematic) type, VA (Vertical Alignment) type, and ADS (Advanced Dimension Switching, advanced field switching) type liquid crystal display panel, for example.

In an embodiment, the display substrate may include: a first substrate and a second substrate that are mutually aligned; the polarizing layer includes: the first polarizing layer is arranged on the first surface of the first substrate far away from the second substrate; the second polarizing layer is arranged on the second surface of the second substrate far away from the first substrate; an included angle is formed between the polarization direction of the first polarized light layer to the light and the polarization direction of the second polarized light layer to the light, so that the transmittance of the display substrate to the light is minimum relative to other included angles.

In this embodiment, the materials of the first polarizing layer and the second polarizing layer may be selected as described above, and the materials of the first adhesive layer and the second adhesive layer may be selected as described above, which will not be described herein.

The included angle between the polarization direction of the first polarized light layer to the light and the polarization direction of the second polarized light layer to the light is controlled, so that the transmittance of the display substrate to the light reaches the minimum value, the contrast of the display panel is improved, the contrast reaches the maximum value, and a better display effect is brought.

The display panel of the embodiment can effectively avoid bending of the polaroid, thereby reducing the light leakage risk, simultaneously obtaining high transmittance and contrast, and improving the product competitiveness.

The embodiment provides a display device, which comprises the display panel.

The embodiment provides a method for manufacturing a display panel, which may include: providing a display substrate; forming a glue layer on at least one surface of the display substrate; and forming a polarizing layer directly on the adhesive layer.

In one embodiment, forming the polarizing layer directly on the adhesive layer may include: stretching the polarized material film layer, attaching the stretched polarized material film layer on the adhesive layer, and curing the stretched polarized material film layer on the adhesive layer by heating or irradiation of UV light to form a polarized layer; or coating the polarized material solution on the adhesive layer, and curing the coated polarized material solution on the adhesive layer by heating or irradiation with UV light to form the polarized layer.

In the mode of forming the polarizing layer, the polarizing material film layer may be stretched and then attached to the adhesive layer, or the polarizing material solution may be coated on the adhesive layer, and then the polarizing material is cured on the adhesive layer by a heating process or UV (Ultraviolet) light irradiation to form the polarizing layer.

For example, referring to fig. 3, for a Glass (Glass) substrate, a PVA film layer may be stretched after absorbing iodide ions, during which the iodide ions are aligned in a stretching direction to polarize light, and the stretched PVA film layer is respectively attached to a color film substrate and an array substrate, so that the polarization directions of the light by the color film substrate and the array substrate are perpendicular to each other, so as to reduce light transmittance.

In an embodiment, the method for manufacturing a display panel of the present embodiment may further include: and forming a supporting layer on the surface of the polarizing layer, which is far away from the display substrate.

In an embodiment, the method for manufacturing a display panel of the present embodiment may further include: providing a first substrate and a second substrate, and aligning the first substrate and the second substrate; forming a first adhesive layer on the first surface of the first substrate far away from the second substrate, forming a first polarizing layer on the first adhesive layer, forming a second adhesive layer on the second surface of the second substrate far away from the first substrate, and forming a second polarizing layer on the second adhesive layer; an included angle is formed between the polarization direction of the first polarized light layer to the light and the polarization direction of the second polarized light layer to the light, so that the transmittance of the display substrate to the light is minimum relative to other included angles.

In this embodiment, the polarizer structure may be formed on the liquid crystal panel formed by the first substrate and the second substrate just aligned, or may be formed when the liquid crystal panel is cut into individual display panels, and may be selected as required by those skilled in the art.

In this embodiment, after the polarizer structure of the first substrate is attached, the polarizer structure of the angle polarization direction is attached to the second substrate after detecting the angle at which the light transmittance of the display substrate is minimum by using the polarizer, so that the contrast ratio of the display panel is maximized.

It is noted that the terms used herein are used merely to describe particular embodiments and are not intended to limit exemplary embodiments in accordance with the present application and when the terms "comprises" and/or "comprising" are used in this specification they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and in the drawings are used for distinguishing between similar objects and not for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances.

It should be understood that the exemplary embodiments in this specification may be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, and should not be construed as limiting the invention.

While the spirit and principles of the present invention have been described with reference to several particular embodiments, it is to be understood that the invention is not limited to the disclosed embodiments nor does it imply that features of the various aspects are not useful in combination, nor are they useful in any combination, such as for convenience of description. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (11)

1. A polarizer structure, comprising:

a polarizing layer; and

and the adhesive layer is used for directly bonding the polarizing layer to at least one surface of the display substrate.

2. The polarizer structure of claim 1, further comprising:

the support layer is arranged on the surface, far away from the display substrate, of the polarizing layer.

3. A polarizer structure according to claim 1, wherein the glue layer has a thickness of 5 μm to 40 μm.

4. A polarizer structure according to claim 1, wherein the glue layer has a thickness of 8 μm to 12 μm.

5. A display panel, comprising:

a display substrate; and

the polarizer structure of any one of claims 1 to 4.

6. The display panel of claim 5, wherein the display substrate comprises:

a first substrate and a second substrate, the first substrate and the second substrate being mutually paired;

the polarizing layer includes:

the first polarizing layer is arranged on the first surface of the first substrate, which is far away from the second substrate;

the second polarizing layer is arranged on a second surface of the second substrate, which is far away from the first substrate;

and an included angle is formed between the polarization direction of the first polarized light layer to the light and the polarization direction of the second polarized light layer to the light, so that the transmittance of the display substrate to the light is minimum relative to other included angles.

7. A display device comprising the display panel according to claim 5 or 6.

8. A method for manufacturing a display panel, comprising:

providing a display substrate;

forming a glue layer on at least one surface of the display substrate;

and forming a polarizing layer directly on the adhesive layer.

9. The method of claim 8, wherein forming a polarizing layer directly on the glue layer comprises:

stretching the polarized material film layer and attaching the stretched polarized material film layer on the adhesive layer, and curing the stretched polarized material film layer on the adhesive layer by heating or irradiation of UV light to form a polarized layer; or (b)

And coating the polarized material solution on the adhesive layer, and curing the coated polarized material solution on the adhesive layer by heating or irradiating with UV light to form the polarized layer.

10. The method of manufacturing a display panel according to claim 8, further comprising:

and forming a supporting layer on the surface of the polarizing layer, which is far away from the display substrate.

11. The method of manufacturing a display panel according to claim 8, further comprising:

providing a first substrate and a second substrate, and aligning the first substrate and the second substrate;

forming a first adhesive layer on a first surface of the first substrate far away from the second substrate, forming a first polarizing layer on the first adhesive layer, forming a second adhesive layer on a second surface of the second substrate far away from the first substrate, and forming a second polarizing layer on the second adhesive layer;

and an included angle is formed between the polarization direction of the first polarized light layer to the light and the polarization direction of the second polarized light layer to the light, so that the transmittance of the display substrate to the light is minimum relative to other included angles.