CN213544871U - Polaroid, display screen and display module - Google Patents
Polaroid, display screen and display module Download PDFInfo
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- CN213544871U CN213544871U CN202021909834.1U CN202021909834U CN213544871U CN 213544871 U CN213544871 U CN 213544871U CN 202021909834 U CN202021909834 U CN 202021909834U CN 213544871 U CN213544871 U CN 213544871U
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Abstract
One or more embodiments of the specification disclose a polarizer, a display screen and a display module. This polaroid, including the pressure sensitive adhesive layer, first cellulose triacetate TAC film, polyvinyl alcohol PVA film, the second TAC film of superpose in order, pressure sensitive adhesive layer is semi-solid acrylic ester material, changes into semi-solid acrylic ester material through the material with the pressure sensitive adhesive layer in the polaroid, works as after the polaroid is laminated to liquid crystal glass pressure sensitive adhesive layer forms the acrylic ester material of complete solidification through the UV solidification, has improved the hardness of pressure sensitive adhesive layer and polaroid, has reduced the absorption rate, has guaranteed the inseparable stability of polaroid structure itself, can avoid the polaroid to arouse the damage in liquid crystal display's preparation technology, improves the quality and the technology yield of polaroid.
Description
Technical Field
This document relates to display technology technical field, especially relates to a polaroid, display screen and display module assembly.
Background
Static electricity and electrostatic discharge are ubiquitous in daily life, and a small electrostatic discharge that is difficult to detect at one time can cause serious damage to electronic devices. In particular, the higher the sensitivity of electronic components to static electricity, the more and more the electronic components are damaged by electrostatic discharge. The polarizer is one of the key technologies of the liquid crystal display, the liquid crystal display imaging must depend on the polarizer, and a polarizer is respectively and closely attached to two sides of the liquid crystal glass of all the liquid crystal displays.
The problem that exists is that, the material of present polaroid is softer, when carrying out silver thick liquid overlap joint polaroid static conduction technology in liquid crystal display's preparation process, during the volatile agent in the silver thick liquid can permeate the polaroid, causes defects such as polaroid edge foaming corrosion, influences the quality and the technology yield of polaroid. Therefore, how to avoid the damage of the polarizer in the manufacturing process of the liquid crystal display, and improve the quality and the process yield of the polarizer become technical problems which need to be solved urgently.
Disclosure of Invention
One or more embodiments of the present disclosure are to provide a polarizer, a display panel and a display module, which can prevent the polarizer from being damaged in a manufacturing process of a liquid crystal display, and improve quality and process yield of the polarizer.
To solve the above technical problem, one or more embodiments of the present specification are implemented as follows:
in a first aspect, a polarizer is provided, which includes a pressure-sensitive adhesive layer, a first TAC film, a PVA film, and a second TAC film, which are stacked in sequence, wherein the pressure-sensitive adhesive layer is a semi-cured acrylate material.
In a second aspect, a display screen is provided, which comprises liquid crystal display screen upper glass, liquid crystal display screen lower glass and the polaroid, wherein the polaroid is arranged on the liquid crystal display screen upper glass, and a liquid crystal material is arranged between the liquid crystal display screen upper glass and the liquid crystal display screen lower glass.
In a third aspect, a display module is provided, which comprises the display screen described above.
As can be seen from the technical solutions provided in one or more embodiments of the present disclosure, the polarizer provided in the present application includes a pressure sensitive adhesive layer, a first TAC film, a PVA film, and a second TAC film, which are sequentially stacked, where the pressure sensitive adhesive layer is a semi-cured acrylate material. The finished polaroid product can adopt the structure, or the structure can be formed after the polaroid is attached to the liquid crystal display glass. Because the pressure sensitive adhesive layer is a semi-cured acrylate material, the fitness between the pressure sensitive adhesive layer and the liquid crystal display glass is high when the polaroid is attached to the liquid crystal display glass, and then the semi-cured acrylate material of the pressure sensitive adhesive layer is subjected to UV curing to form a completely cured acrylate material, so that the hardness of the pressure sensitive adhesive layer and the polaroid is improved, the absorption rate of the pressure sensitive adhesive layer is reduced, the tightness and the stability of the structure of the polaroid are ensured, the polaroid can be prevented from being damaged in the subsequent preparation process of the liquid crystal display, particularly, a volatile agent inside the silver paste in the subsequent silver paste conductive process can be isolated from permeating into the polaroid, particularly the pressure sensitive adhesive layer when volatilizing, the edge of the polaroid is prevented.
Drawings
In order to more clearly illustrate one or more embodiments or prior art solutions of the present specification, reference will now be made briefly to the attached drawings, which are needed in the description of one or more embodiments or prior art, and it should be apparent that the drawings in the description below are only some of the embodiments described in the specification, and that other drawings may be obtained by those skilled in the art without inventive exercise.
Fig. 1 is a schematic structural diagram of a polarizer provided in an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of another polarizer provided in an embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of another polarizer provided in an embodiment of the present disclosure.
Fig. 4 is a schematic side view of a display screen provided in an embodiment of the present disclosure.
Fig. 5 is a schematic top view of the display screen of fig. 4.
10-a second TAC film; 20-PVA film; 30-a first TAC film; 40-a pressure sensitive adhesive layer; 50-a first release film; 60-a second release film; 1-a polarizer; 2-upper glass of the liquid crystal display screen; 3-lower glass of the liquid crystal display screen; 4-a liquid crystal material; 5-conductive silver paste; 6-a grounding welding spot; 7-IC chip; 8-FPC.
Detailed Description
In order to make the technical solutions in the present specification better understood, the technical solutions in one or more embodiments of the present specification will be clearly and completely described below with reference to the accompanying drawings in one or more embodiments of the present specification, and it is obvious that the one or more embodiments described are only a part of the embodiments of the present specification, and not all embodiments. All other embodiments that can be derived by a person skilled in the art from one or more of the embodiments described herein without making any inventive step shall fall within the scope of protection of this document.
In the polarizer provided by the embodiment of the specification, because the pressure-sensitive adhesive layer is a semi-cured acrylate material, the laminating degree of the polarizer to the liquid crystal display glass is high, and then the semi-cured acrylate material of the pressure-sensitive adhesive layer is subjected to UV curing to form a completely cured acrylate material, so that the hardness of the pressure-sensitive adhesive layer and the polarizer is improved, the absorption rate of the pressure-sensitive adhesive layer is reduced, the tightness and the stability of the structure of the polarizer are ensured, the damage of the pressure-sensitive adhesive layer and the polarizer caused by the subsequent preparation process of the liquid crystal display screen is avoided, and the quality and the process yield of the polarizer are improved. The polarizer provided in the embodiments of the present specification and various portions thereof will be described in detail below.
It should be noted that, the liquid crystal display upper glass and the liquid crystal display lower glass mentioned in the present application are when the liquid crystal display user uses the liquid crystal display, the glass close to the user is the liquid crystal display upper glass, the glass relatively far away from the user is the liquid crystal display lower glass, the polarizer close to the user is the upper polarizer, otherwise, the polarizer is the lower polarizer.
Example one
Referring to fig. 1, a polarizer provided in an embodiment of the present disclosure includes a pressure sensitive adhesive layer 40, a first TAC film 30, a polyvinyl alcohol PVA film 20, and a second TAC film 10, which are sequentially stacked, where the pressure sensitive adhesive layer 40 is a semi-cured acrylate material.
The PVA film 20 can generate polarized light, TAC protective films are arranged on two sides of the PVA film 20, all the layers can be bonded by pressure-sensitive adhesives, the pressure-sensitive adhesive layer 40 is used for bonding the polarizer on a glass plate of the liquid crystal screen, and the pressure-sensitive adhesive layer 40 is made of acrylic ester materials and is semi-cured acrylic ester materials.
The pressure-sensitive adhesive layer of traditional polaroid is about 20um, and is very thin and softer, does not have sufficient hardness, and the adhesion is not strong, can take place the condition of damaging in liquid crystal display's preparation technology, especially in leading static technology with some/line silver thick liquid overlap joint polaroid, the inside volatile agent of some/line silver thick liquid can permeate in the laminated structure of polaroid especially in the softer pressure-sensitive adhesive layer volatilizing the in-process, cause the marginal bubble of polaroid to appear, bad phenomena such as corruption even.
In the polaroid that this specification embodiment provided, pressure sensitive adhesive layer is the acrylic acid ester material of semi-curing, from this pressure sensitive adhesive layer has certain structural rigidity, and acrylic acid ester material has better adhesion, after laminating the polaroid on liquid crystal screen glass, when point/line silver thick liquid overlap joint polaroid leads static technology, the edge and the inside of the unable infiltration polaroid of additives such as volatile agent in the point/line silver thick liquid, the structure of the bonding leakproofness and pressure sensitive adhesive layer itself between reinforcing polaroid and liquid crystal screen glass is compact, avoid the harmful effects of volatile agent in the point/line silver thick liquid etc., improve product quality.
In some embodiments, the polarizer provided in the embodiments of the present disclosure includes conductive particles dispersed in the pressure-sensitive adhesive layer 40.
The purpose that the liquid crystal display adopts pressure sensitive adhesive layer 40 can be to adhere the polaroid on liquid crystal display glass, if be provided with conductive particle in pressure sensitive adhesive layer 40 in a dispersed manner, can lead the static that touch-sensitive screen and polaroid (the polaroid here is the piece of laminating on liquid crystal display upper glass) produced to the ground connection solder joint on the lower glass of liquid crystal display, plate the mode that the one deck is used for tie point/line silver thick liquid to lead the static on the upper glass of liquid crystal display for the tradition, simple process, cost reduction.
Referring to fig. 2, in some embodiments, in the polarizer provided in the embodiments of the present disclosure, the polarizer further includes a first release film 50, and the pressure-sensitive adhesive layer 40 is disposed on the first release film 50.
In order to prevent the polarizer from being damaged or contaminated during the processing and transportation process, a peelable surface protection film, such as a release film of PET, is generally disposed on the surface of the polarizer. In the polarizer provided in the embodiment of the present disclosure, the first release film 50 is disposed below the pressure sensitive adhesive layer 40, and when the polarizer is used, for example, the polarizer is attached to the liquid crystal display glass, the first release film 50 needs to be torn off. In the polarizer provided in the embodiment of the present description, the pressure sensitive adhesive layer 40 is a semi-cured acrylate material, and has a good hardness, and when the first release film 50 is peeled off, the situations such as edge deformation of the pressure sensitive adhesive layer do not occur. Compared with the situation that the pressure-sensitive adhesive layer of the traditional polaroid is not soft and hard enough, and the edge of the pressure-sensitive adhesive layer is easy to tear and deform when the polaroid is torn from a film, the quality of the polaroid provided by the embodiment of the specification is improved.
Referring to fig. 3, in some embodiments, the polarizer provided in the embodiments of the present disclosure further includes a second release film 60, and the second release film 60 is disposed on the second TAC film 20.
It is understood that a second release film 60, such as a PET film, may be disposed on the second TAC film 20 in order to better prevent the polarizer from being damaged or contaminated during processing and transportation.
The complete structure of the polarizer provided by the embodiment of the present specification includes a first release film 50, a pressure sensitive adhesive layer 40, a first TAC film 30, a PVA film 20, a second TAC film 10, and a second release film 60, which are sequentially stacked, and when the polarizer is attached to the liquid crystal display glass, the first release film is firstly torn (where the above polarizer is attached to the upper glass of the liquid crystal display glass is referred to as the above polarizerFor example, since the polarizer is overlapped with the conductive silver paste, taking the polarizer as an example), the pressure-sensitive adhesive layer is attached to the upper glass of the liquid crystal display, and at the moment, since the pressure-sensitive adhesive layer is a semi-cured acrylate material and has certain flexibility, the attaching effect of the pressure-sensitive adhesive layer to the upper glass of the liquid crystal display is good; and then carrying out UV curing on the pressure-sensitive adhesive layer of the polaroid attached to the upper piece of glass of the liquid crystal display screen, and carrying out a point/line silver paste lap joint polaroid static conduction process after the pressure-sensitive adhesive layer is completely cured. Because the pressure-sensitive adhesive layer is completely cured acrylate material, the adhesive force and the sealing property of the pressure-sensitive adhesive layer and the upper piece of glass of the liquid crystal display screen are enhanced, the hardness and the compactness of the self structure of the pressure-sensitive adhesive layer are also enhanced, the hardness of the pressure-sensitive adhesive layer formed by the completely cured acrylate material is Shore D30-D40, the water absorption rate is lower than 0.15 percent, and the shear strength is 21N/mm2Left and right. Therefore, when the point/line silver paste lap joint polaroid static conduction process is carried out, solvents such as volatile agents and the like volatilized in the curing process of the point/line silver paste cannot permeate into the pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer and the polaroid cannot be damaged, and the quality of products and the process yield are improved.
Through above-mentioned technical scheme, the polaroid that this application provided includes the pressure sensitive adhesive layer, first TAC film, PVA film, the second TAC film of superpose in order, and the pressure sensitive adhesive layer is the acrylic ester material of semi-curing. The finished polaroid product can adopt the structure, or the structure can be formed after the polaroid is attached to the liquid crystal display glass. Because the pressure sensitive adhesive layer is a semi-cured acrylate material, the fitness between the pressure sensitive adhesive layer and the liquid crystal display glass is high when the polaroid is attached to the liquid crystal display glass, and then the semi-cured acrylate material of the pressure sensitive adhesive layer is subjected to UV curing to form a completely cured acrylate material, so that the hardness of the pressure sensitive adhesive layer and the polaroid is improved, the absorption rate of the pressure sensitive adhesive layer is reduced, the tightness and the stability of the structure of the polaroid are ensured, the polaroid can be prevented from being damaged in the subsequent preparation process of the liquid crystal display, particularly, a volatile agent inside the silver paste in the subsequent silver paste conductive process can be isolated from permeating into the polaroid, particularly the pressure sensitive adhesive layer when volatilizing, the edge of the polaroid is prevented.
Example two
Referring to fig. 4, a display screen provided in an embodiment of the present disclosure includes an upper glass 2 of a liquid crystal display screen, a lower glass 4 of the liquid crystal display screen, and a polarizer 1 according to the foregoing, where the polarizer 1 is disposed on the upper glass 2 of the liquid crystal display screen, and a liquid crystal material 4 is disposed between the upper glass 2 of the liquid crystal display screen and the lower glass 3 of the liquid crystal display screen.
When the specification is needed, the polarizer is lapped with the conductive silver paste, the position relation between the upper polarizer and the liquid crystal display glass is shown in the figure, and the lower polarizer is not lapped with the conductive silver paste, so that the illustration is not given.
As shown in fig. 4, a polarizer is disposed on an upper glass 2 of the liquid crystal display, and a liquid crystal material 4 is disposed between the upper glass and a lower glass of the liquid crystal display.
The PVA film 20 (see figure 1) of the pressure sensitive adhesive layer 10 in the polarizer 1 can generate polarized light, TAC protective films are arranged on two sides of the PVA film 20, the layers can be bonded by adopting a pressure sensitive adhesive, the pressure sensitive adhesive layer 40 is used for bonding the polarizer on a glass plate of a liquid crystal screen, and the pressure sensitive adhesive layer 40 is made of acrylate materials and is semi-cured acrylate materials.
The pressure-sensitive adhesive layer of traditional polaroid is about 20um, and is very thin and softer, does not have sufficient hardness, and the adhesion is not strong, can take place the condition of damaging in liquid crystal display's preparation technology, especially in leading static technology with some/line silver thick liquid overlap joint polaroid, the inside volatile agent of some/line silver thick liquid can permeate in the laminated structure of polaroid especially in the softer pressure-sensitive adhesive layer volatilizing the in-process, cause the marginal bubble of polaroid to appear, bad phenomena such as corruption even.
In the polaroid that this specification embodiment provided, pressure sensitive adhesive layer is the acrylic acid ester material of semi-curing, from this pressure sensitive adhesive layer has certain structural rigidity, and acrylic acid ester material has better adhesion, after laminating the polaroid on liquid crystal screen glass, when point/line silver thick liquid overlap joint polaroid leads static technology, the edge and the inside of the unable infiltration polaroid of additives such as volatile agent in the point/line silver thick liquid, the structure of the bonding leakproofness and pressure sensitive adhesive layer itself between reinforcing polaroid and liquid crystal screen glass is compact, avoid the harmful effects of volatile agent in the point/line silver thick liquid etc., improve product quality.
The purpose of the pressure sensitive adhesive layer 40 used in the lcd panel may be to adhere the polarizer to the lcd panel glass, so that the static electricity generated by the touch panel and the polarizer (here, the polarizer is a piece of glass adhered to the upper glass of the lcd panel) may be conducted to the grounding pads on the lower glass of the lcd panel if the conductive particles are dispersed in the pressure sensitive adhesive layer 40. Compared with the traditional mode of plating a layer of high-resistance film for connecting points/line silver paste to conduct static electricity on the upper piece of glass of the liquid crystal display screen, the method has the advantages of simple process and low cost.
In some embodiments, the display screens provided in the embodiments of the present disclosure, the pressure sensitive adhesive layer is formed into a fully cured acrylate material after UV curing.
The complete structure of the polarizer provided by the embodiment of the specification comprises a first release film 50, a pressure sensitive adhesive layer 40, a first TAC film 30, a PVA film 20, a second TAC film 10 and a second release film 60 which are sequentially overlapped, when the polarizer is attached to liquid crystal display glass, the first release film is firstly torn away (taking the polarizer attached to the liquid crystal display upper glass as an example, and the polarizer is overlapped with conductive silver paste as an example), the pressure sensitive adhesive layer is attached to the liquid crystal display upper glass, and at the moment, the pressure sensitive adhesive layer is made of semi-cured acrylate materials and has certain flexibility, so that the attachment effect of the pressure sensitive adhesive layer to the liquid crystal display upper glass is good; and then carrying out UV curing on the pressure-sensitive adhesive layer of the polaroid attached to the upper piece of glass of the liquid crystal display screen, and carrying out a point/line silver paste lap joint polaroid static conduction process after the pressure-sensitive adhesive layer is completely cured. Because the pressure-sensitive adhesive layer is a completely cured acrylate material, the adhesive force and the sealing property of the pressure-sensitive adhesive layer and the upper glass of the liquid crystal display screen are enhanced, the hardness and the compactness of the structure of the pressure-sensitive adhesive layer are also enhanced, and the completely cured acrylate material is usedThe hardness of the pressure-sensitive adhesive layer formed by the material is Shore D30-D40, the water absorption is lower than 0.15 percent, and the shear strength is 21N/mm2Left and right. Therefore, when the point/line silver paste lap joint polaroid static conduction process is carried out, solvents such as volatile agents and the like volatilized in the curing process of the point/line silver paste cannot permeate into the pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer and the polaroid cannot be damaged, and the quality of products and the process yield are improved.
Therefore, in the polarizer of the display screen product provided in the embodiments of the present disclosure, the acrylate material that is completely cured in the pressure sensitive adhesive layer, as well as the adhesion and sealing property between the pressure sensitive adhesive layer and the lower glass of the liquid crystal display screen and the structural tightness/hardness of the pressure sensitive adhesive layer itself are enhanced, and the quality of the liquid crystal display screen is improved.
Referring to fig. 4 and 5, in some embodiments, the display screen provided in the embodiments of the present disclosure further includes conductive silver paste 5 prepared by a line silver paste process, where in a case where conductive particles are dispersed in the pressure-sensitive adhesive layer, the lower glass 3, the upper glass 2, and the polarizer 1 of the liquid crystal display screen form a step shape on one side of the flexible circuit board PFC8, the lower glass 3 of the liquid crystal display screen is provided with a ground pad, and the conductive silver paste 5 is from the pressure-sensitive adhesive layer to the ground pad 6 through the upper glass 2 of the liquid crystal display screen.
As shown in fig. 4 and 5, the structure from the pressure sensitive adhesive layer of the polarizer to the grounding welding point 6 through the upper glass 2 of the liquid crystal display screen is used for conducting static electricity generated by the touch screen and the polarizer in the use process of the liquid crystal display screen to the grounding welding point 6, and then conducting the static electricity to the ground through a human body by the shell of the device where the liquid crystal display screen is located.
The conductive particles are dispersed in the pressure-sensitive adhesive layer, the conductive silver paste is electrically connected with the pressure-sensitive adhesive layer, static electricity generated on the touch screen can be conducted to the grounding welding spot 6 on the lower piece of glass of the liquid crystal display screen, the step-shaped structural design is simple and novel, and compared with the traditional mode that a layer of high-resistance film used for connecting point/line silver paste conducting static electricity is plated on the upper piece of glass of the liquid crystal display screen, the process is simple and the cost is reduced.
Referring to fig. 4 and 5, in some embodiments, the display panel provided in the embodiments of the present disclosure has two ground pads 6, the ground pads 6 are dispersedly disposed on the lower glass sheet 3 of the lcd panel, and two ends of the conductive silver paste 5 extending along the pressure sensitive adhesive layer on one side of the flexible circuit board PFC8 are respectively connected to the ground pads 6 via the upper glass sheet 2 of the lcd panel.
In order to improve the static electricity conducting capacity of the display screen, two grounding welding spots 6 can be arranged on the lower glass sheet of the liquid crystal display screen. As can be seen from fig. 5, the grounding pads 6 are dispersedly disposed, in this case, the conductive silver paste 5 extends along the pressure sensitive adhesive layer of the polarizer 1 on one side of the PFC to form two end portions, and the two end portions are respectively connected to the grounding pads 6 through the upper glass 2 of the liquid crystal display, so as to improve the static electricity conducting capability of the conductive silver paste 5 and the display.
In some embodiments, the display screens provided in the embodiments herein, the pressure sensitive adhesive layer formed from the fully cured acrylate material has a hardness in the range of Shore D30-D40.
The pressure sensitive adhesive layer formed from the fully cured acrylate material has a hardness of Shore D30-D40, alternatively Shore D35, a water absorption of less than 0.15%, and a shear strength of 21N/mm2Left and right. Therefore, the tightness/hardness of the pressure-sensitive adhesive layer of the polaroid is enhanced, and good adhesion and sealing performance can be kept between the pressure-sensitive adhesive layer and the upper glass of the liquid crystal display screen.
Through above-mentioned technical scheme, the polaroid that this application provided includes the pressure sensitive adhesive layer, first TAC film, PVA film, the second TAC film of superpose in order, and the pressure sensitive adhesive layer is the acrylic ester material of semi-curing. The finished polaroid product can adopt the structure, or the structure can be formed after the polaroid is attached to the liquid crystal display glass. Because the pressure sensitive adhesive layer is a semi-cured acrylate material, the fitness between the pressure sensitive adhesive layer and the liquid crystal display glass is high when the polaroid is attached to the liquid crystal display glass, and then the semi-cured acrylate material of the pressure sensitive adhesive layer is subjected to UV curing to form a completely cured acrylate material, so that the hardness of the pressure sensitive adhesive layer and the polaroid is improved, the absorption rate of the pressure sensitive adhesive layer is reduced, the tightness and the stability of the structure of the polaroid are ensured, the polaroid can be prevented from being damaged in the subsequent preparation process of the liquid crystal display, particularly, a volatile agent inside the silver paste in the subsequent silver paste conductive process can be isolated from permeating into the polaroid, particularly the pressure sensitive adhesive layer when volatilizing, the edge of the polaroid is prevented.
EXAMPLE III
The display module that this specification embodiment provided includes according to the above-mentioned display screen. The display screen comprises liquid crystal display screen upper glass, liquid crystal display screen lower glass and the polaroid according to the above, wherein the polaroid is arranged on the liquid crystal display screen upper glass, and a liquid crystal material is arranged between the liquid crystal display screen upper glass and the liquid crystal display screen lower glass.
When the specification is needed, the polarizer is lapped with the conductive silver paste, the position relation between the upper polarizer and the liquid crystal display glass is shown in the figure, and the lower polarizer is not lapped with the conductive silver paste, so that the illustration is not given.
As shown in fig. 4, a polarizer is disposed on an upper glass 2 of the liquid crystal display, and a liquid crystal material 4 is disposed between the upper glass and a lower glass of the liquid crystal display.
The PVA film 20 (see figure 1) of the pressure sensitive adhesive layer 10 in the polarizer 1 can generate polarized light, TAC protective films are arranged on two sides of the PVA film 20, the layers can be bonded by adopting a pressure sensitive adhesive, the pressure sensitive adhesive layer 40 is used for bonding the polarizer on a glass plate of a liquid crystal screen, and the pressure sensitive adhesive layer 40 is made of acrylate materials and is semi-cured acrylate materials.
The pressure-sensitive adhesive layer of traditional polaroid is about 20um, and is very thin and softer, does not have sufficient hardness, and the adhesion is not strong, can take place the condition of damaging in liquid crystal display's preparation technology, especially in leading static technology with some/line silver thick liquid overlap joint polaroid, the inside volatile agent of some/line silver thick liquid can permeate in the laminated structure of polaroid especially in the softer pressure-sensitive adhesive layer volatilizing the in-process, cause the marginal bubble of polaroid to appear, bad phenomena such as corruption even.
In the polaroid that this specification embodiment provided, pressure sensitive adhesive layer is the acrylic acid ester material of semi-curing, from this pressure sensitive adhesive layer has certain structural rigidity, and acrylic acid ester material has better adhesion, after laminating the polaroid on liquid crystal screen glass, when point/line silver thick liquid overlap joint polaroid leads static technology, the edge and the inside of the unable infiltration polaroid of additives such as volatile agent in the point/line silver thick liquid, the structure of the bonding leakproofness and pressure sensitive adhesive layer itself between reinforcing polaroid and liquid crystal screen glass is compact, avoid the harmful effects of volatile agent in the point/line silver thick liquid etc., improve product quality.
The purpose of the pressure sensitive adhesive layer 40 used in the lcd panel may be to adhere the polarizer to the lcd panel glass, so that the static electricity generated by the touch panel and the polarizer (here, the polarizer is a piece of glass adhered to the upper glass of the lcd panel) may be conducted to the grounding pads on the lower glass of the lcd panel if the conductive particles are dispersed in the pressure sensitive adhesive layer 40. Compared with the traditional mode of plating a layer of high-resistance film for connecting points/line silver paste to conduct static electricity on the upper piece of glass of the liquid crystal display screen, the method has the advantages of simple process and low cost.
Through above-mentioned technical scheme, the polaroid that this application provided includes the pressure sensitive adhesive layer, first TAC film, PVA film, the second TAC film of superpose in order, and the pressure sensitive adhesive layer is the acrylic ester material of semi-curing. The finished polaroid product can adopt the structure, or the structure can be formed after the polaroid is attached to the liquid crystal display glass. Because the pressure sensitive adhesive layer is a semi-cured acrylate material, the fitness between the pressure sensitive adhesive layer and the liquid crystal display glass is high when the polaroid is attached to the liquid crystal display glass, and then the semi-cured acrylate material of the pressure sensitive adhesive layer is subjected to UV curing to form a completely cured acrylate material, so that the hardness of the pressure sensitive adhesive layer and the polaroid is improved, the absorption rate of the pressure sensitive adhesive layer is reduced, the tightness and the stability of the structure of the polaroid are ensured, the polaroid can be prevented from being damaged in the subsequent preparation process of the liquid crystal display, particularly, a volatile agent inside the silver paste in the subsequent silver paste conductive process can be isolated from permeating into the polaroid, particularly the pressure sensitive adhesive layer when volatilizing, the edge of the polaroid is prevented.
In short, the above description is only a preferred embodiment of the present disclosure, and is not intended to limit the scope of the present disclosure. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present specification shall be included in the protection scope of the present specification.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
Claims (7)
1. The polaroid is characterized by comprising a pressure-sensitive adhesive layer, a first cellulose Triacetate (TAC) film, a polyvinyl alcohol (PVA) film and a second TAC film which are sequentially stacked, wherein the pressure-sensitive adhesive layer is a semi-cured acrylate material.
2. The polarizer of claim 1, further comprising a first release film, wherein the pressure sensitive adhesive layer is disposed on the first release film.
3. The polarizer according to any of claims 1 to 2, further comprising a second release film disposed on the second TAC film.
4. A display screen, characterized by comprising an upper piece of liquid crystal display screen glass, a lower piece of liquid crystal display screen glass and the polarizer according to any one of claims 1 to 3, wherein the polarizer is arranged on the upper piece of liquid crystal display screen glass, and a liquid crystal material is arranged between the upper piece of liquid crystal display screen glass and the lower piece of liquid crystal display screen glass.
5. A display screen as recited in claim 4, wherein the pressure sensitive adhesive layer is formed as a fully cured acrylate material after UV curing.
6. A display screen according to any one of claims 4 to 5, characterised in that the pressure sensitive adhesive layer formed from fully cured acrylate material has a hardness in the Shore D30-D40.
7. A display module, characterized in that, includes the display screen of any one of claims 4 to 6.
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| CN115132081A (en) * | 2022-06-27 | 2022-09-30 | 武汉天马微电子有限公司 | Display module and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115132081A (en) * | 2022-06-27 | 2022-09-30 | 武汉天马微电子有限公司 | Display module and display device |
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