CN112255828A - Flexible liquid crystal display panel and manufacturing method thereof - Google Patents

Flexible liquid crystal display panel and manufacturing method thereof Download PDF

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Publication number
CN112255828A
CN112255828A CN202011110220.1A CN202011110220A CN112255828A CN 112255828 A CN112255828 A CN 112255828A CN 202011110220 A CN202011110220 A CN 202011110220A CN 112255828 A CN112255828 A CN 112255828A
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China
Prior art keywords
flexible substrate
liquid crystal
flexible
electromagnetic shielding
display panel
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Pending
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CN202011110220.1A
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Chinese (zh)
Inventor
李林霜
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Priority to CN202011110220.1A priority Critical patent/CN112255828A/en
Publication of CN112255828A publication Critical patent/CN112255828A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133305—Flexible substrates, e.g. plastics, organic film
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/22—Antistatic materials or arrangements

Abstract

The application discloses a flexible liquid crystal display panel and a manufacturing method thereof, wherein the flexible liquid crystal display panel comprises a first flexible substrate and a second flexible substrate which are oppositely arranged, a liquid crystal layer arranged between the first flexible substrate and the second flexible substrate, and an electromagnetic shielding layer arranged on one side, far away from the liquid crystal layer, of the first flexible substrate; the material of the electromagnetic shielding layer comprises a transparent conductive polymer. This application is through introducing transparent conducting polymer as the electromagnetic shield layer on first flexible base plate, can show the electromagnetic shielding performance who improves flexible liquid crystal display panel, is favorable to improving display effect and can not influence flexible liquid crystal display panel's the performance of buckling.

Description

Flexible liquid crystal display panel and manufacturing method thereof
Technical Field
The application relates to the technical field of display, in particular to a flexible liquid crystal display panel and a manufacturing method thereof.
Background
The flexible display panel has the characteristics of light weight, thinness, bending and even curling. Therefore, flexible display is becoming an important direction of next generation display technology. Compared to a flexible OLED (Organic Light-Emitting Diode), a flexible LCD (Liquid Crystal Display) has a longer service life and a lower production cost. Therefore, flexible LCD displays become a hot spot of research and a development direction in the future.
In the prior art, the preparation process of the flexible LCD display panel is as follows: (1) respectively performing a Thin Film Transistor (TFT) process and a Color Filter (CF) process on two glass substrates coated with a flexible polyimide Film to form a TFT substrate and a CF substrate; (2) injecting liquid crystal into the TFT substrate and the CF substrate to form a box pair; (3) and respectively separating the two glass substrates from the corresponding flexible polyimide films by a laser stripping technology to form the flexible LCD display panel.
The flexible LCD display panel uses a flexible polyimide film as a substrate base plate, and a film layer for electromagnetic field shielding is lacked on the substrate base plate, so that the display panel is easily interfered by an external electromagnetic field, a screen flashing phenomenon occurs, and the display effect is seriously influenced.
Disclosure of Invention
The application provides a flexible liquid crystal display panel and a manufacturing method thereof, and the transparent conductive polymer is introduced to the first flexible substrate to serve as an electromagnetic shielding layer, so that the electromagnetic shielding performance of the flexible liquid crystal display panel can be obviously improved, the display effect can be improved, and the bending performance of the flexible liquid crystal display panel cannot be influenced.
The application provides a flexible liquid crystal display panel, which comprises a first flexible substrate and a second flexible substrate which are oppositely arranged, a liquid crystal layer arranged between the first flexible substrate and the second flexible substrate, and an electromagnetic shielding layer arranged on one side of the first flexible substrate, which is far away from the liquid crystal layer;
the material of the electromagnetic shielding layer comprises a transparent conductive polymer.
Optionally, the transparent conductive polymer is a cross-linked network structure.
Optionally, the transparent conductive polymer comprises transparent conductive polyimide.
Optionally, the first flexible substrate includes a first flexible substrate and a color filter, which are sequentially disposed on one side of the electromagnetic shielding layer close to the liquid crystal layer; the second flexible substrate comprises a second flexible substrate and a TFT array layer, wherein the second flexible substrate is arranged opposite to the first flexible substrate, and the TFT array layer is positioned on one side, close to the liquid crystal layer, of the second flexible substrate.
Optionally, the first flexible substrate includes a first flexible substrate disposed on a side of the electromagnetic shielding layer close to the liquid crystal layer; the second flexible substrate comprises a second flexible substrate arranged opposite to the first flexible substrate, and a TFT array layer and a color filter which are sequentially arranged on one side, close to the liquid crystal layer, of the second flexible substrate.
Optionally, an interpenetrating network structure is formed on a contact surface of the electromagnetic shielding layer and the first flexible substrate.
Optionally, the transmittance of the electromagnetic shielding layer is greater than 90%.
The application also provides a manufacturing method of the flexible liquid crystal display panel, which comprises the following steps:
providing a first glass substrate and a second glass substrate;
sequentially forming an electromagnetic shielding layer and a first flexible substrate on the first glass substrate; wherein the material of the electromagnetic shielding layer comprises a transparent conductive polymer;
forming a second flexible substrate on the second glass substrate;
arranging the first flexible substrate and the second flexible substrate in a box-to-box mode, and forming a liquid crystal layer between the first flexible substrate and the second flexible substrate;
and removing the first glass substrate and the second glass substrate to form the flexible liquid crystal display panel.
Optionally, the removing the first glass substrate and the second glass substrate includes:
and peeling the first glass substrate from the electromagnetic shielding layer by adopting a laser peeling process, and peeling the second peeled substrate from the second flexible substrate.
Optionally, the wavelength of the laser in the laser lift-off process includes 308 nm; the electromagnetic shielding layer has a transmittance of 0 to the laser light.
According to the flexible liquid crystal display panel and the manufacturing method thereof, the electromagnetic shielding layer is arranged on one side, away from the second flexible substrate, of the first flexible substrate, so that the electromagnetic shielding performance of the flexible liquid crystal display panel can be obviously improved, and the display effect is favorably improved; the electromagnetic shielding layer is made of transparent conductive polymer, the electromagnetic shielding layer can be formed by simple processes such as coating and the like when being manufactured, and the transparent conductive polymer is made of high polymer materials, so that the flexibility of the electromagnetic shielding layer is good, and the bending performance of the flexible liquid crystal display panel cannot be influenced.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic cross-sectional structure diagram of a flexible liquid crystal display panel according to an embodiment of the present application.
Fig. 2 is a schematic cross-sectional structure diagram of another flexible liquid crystal display panel provided in an embodiment of the present application.
Fig. 3 is a schematic flow chart of a method for manufacturing a flexible liquid crystal display panel according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of forming an electromagnetic shielding layer and a first flexible substrate in a manufacturing method of a flexible liquid crystal display panel provided in an embodiment of the present application.
Fig. 5 is a schematic structural diagram of forming a second flexible substrate in a method for manufacturing a flexible liquid crystal display panel according to an embodiment of the present application.
Fig. 6 is a schematic structural diagram of a liquid crystal layer formed by a first flexible substrate and a second flexible substrate in a box alignment manner in a method for manufacturing a flexible liquid crystal display panel according to an embodiment of the present application.
Fig. 7 is a schematic structural diagram of a flexible liquid crystal display panel manufactured according to an embodiment of the present disclosure after a first glass substrate and a second glass substrate are peeled off.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
In an exemplary rigid lcd panel, an electromagnetic shielding layer made of ITO (Indium tin oxide) is usually back-coated on a rigid substrate of the lcd panel to shield the external electromagnetic field from the turning of the liquid crystal, but for a flexible lcd panel, the substrate is a flexible substrate, and it is difficult to back-coat ITO on the flexible substrate. Moreover, the ITO thin film is brittle, and the resistance increases when the ITO thin film is bent under stress, which cannot meet the development requirements of the flexible display technology, and thus, the conventional ITO thin film cannot meet the requirements of low-cost flexibility. Therefore, the flexible liquid crystal display panel is lack of an effective electromagnetic shielding layer, so that the display panel is easily interfered by an external electromagnetic field, a screen flashing phenomenon occurs, and the display effect is seriously influenced. In order to solve the above problem, an embodiment of the present application provides a method for manufacturing a flexible liquid crystal display panel.
As shown in fig. 1, an embodiment of the present application provides a flexible liquid crystal display panel 1, where the flexible liquid crystal display panel 1 includes a first flexible substrate 2 and a second flexible substrate 3 that are oppositely disposed, a liquid crystal layer 4 disposed between the first flexible substrate 2 and the second flexible substrate 3, and an electromagnetic shielding layer 5 disposed on a side of the first flexible substrate 2 away from the liquid crystal layer 4; wherein the material of the electromagnetic shielding layer 5 comprises a transparent conductive polymer.
Specifically, the transparent conductive polymer is a high molecular material and has certain flexibility; moreover, the transparent conductive polymer is a cross-linked network structure, and the cross-linked network structure enables the electromagnetic shielding layer 5 to have higher flexibility, namely better bending performance.
In one embodiment, the transparent conductive polymer comprises a transparent conductive polyimide. Specifically, the transparent conductive polyimide is composed of polyimide with a cross-linked network structure and conductive particles dispersed in the polyimide, wherein the conductive particles include metal particles or a mixture of the metal particles and carbon powder, for example, the metal particles are copper particles or silver particles.
Specifically, the first flexible substrate 2 includes a first flexible substrate 6 disposed on a side of the electromagnetic shielding layer 5 close to the liquid crystal layer 4, and of course, some functional structures, such as a light shielding layer or a common electrode, may also be disposed on a side of the first flexible substrate 6 away from the electromagnetic shielding layer 5 as required; the second flexible substrate 3 includes a second flexible substrate 7 disposed opposite to the first flexible substrate 6, and a Thin Film Transistor (TFT) array layer 8 and a color filter 9 sequentially disposed on one side of the second flexible substrate 7 close to the liquid crystal layer 4. In another embodiment, as shown in fig. 2, the first flexible substrate 2 'of the flexible liquid crystal display panel 1' includes a first flexible substrate 6 and a color filter 9 sequentially disposed on one side of the electromagnetic shielding layer 5 adjacent to the liquid crystal layer 4; the second flexible substrate 3' includes a second flexible substrate 7 disposed opposite to the first flexible substrate 6, and a TFT array layer 8 on a side of the second flexible substrate 7 close to the liquid crystal layer 4. That is, the color filter 9 in the flexible liquid crystal display panel 1 in the embodiment of the present application may be disposed on both sides of the liquid crystal layer 4 separately from the TFT array layer 8 (i.e., conventional display panel design), or may be disposed on the same side of the liquid crystal layer 4 (i.e., COA type display panel design).
Specifically, the material of the first flexible substrate 6 and the second flexible substrate 7 is transparent polyimide; and an interpenetrating network structure is formed on the contact surface of the electromagnetic shielding layer 5 and the first flexible substrate 6. Since the transparent conductive polymer (e.g., the transparent conductive polyimide) in the electromagnetic shielding layer 5 has a plurality of molecular branches, and the transparent polyimide in the first flexible layer also has a plurality of molecular branches, when the first flexible substrate 6 is covered on the electromagnetic shielding layer 5 to form a contact surface, the plurality of molecular branches of the transparent conductive polymer in the electromagnetic shielding layer 5 and the plurality of molecular branches of the transparent polyimide in the first flexible substrate 6 are cross-linked with each other at the position of the contact surface to form an interpenetrating network structure. The interpenetrating network structure is favorable for firmer combination between the electromagnetic shielding layer 5 and the first flexible substrate 6, so that the electromagnetic shielding layer 5 and the first flexible substrate 6 are not easy to peel off, and the stability of the structure of the flexible liquid crystal display panel 1 is favorably improved.
Specifically, the light transmittance of the electromagnetic shielding layer 5 is greater than 90%, and the light transmittance of the first flexible substrate 6 and the second flexible substrate 7 is also greater than 90%, so that the light emitting effect of the display panel is not affected by the arrangement of the electromagnetic shielding layer 5.
Specifically, the thickness of the electromagnetic shielding layer 5 is smaller than the thickness of the first flexible substrate 6.
Specifically, the display mode of the flexible liquid crystal display panel 1 includes an IPS (In-Plane Switching) mode, but of course, other display modes are also possible, and the display mode is not limited herein.
In the embodiment, the electromagnetic shielding layer 5 is arranged on the side of the first flexible substrate 2 away from the second flexible substrate 3, so that the electromagnetic shielding performance of the flexible liquid crystal display panel 1 can be obviously improved, and the display effect can be improved; the electromagnetic shielding layer 5 is made of a transparent conductive polymer with a cross-linked network structure, on one hand, the electromagnetic shielding layer 5 can be formed by simple processes such as coating and the like when being manufactured, and on the other hand, the transparent conductive polymer is made of a high polymer material and has a cross-linked network structure, so that the electromagnetic shielding layer 5 has good flexibility and the bending performance of the flexible liquid crystal display panel 1 cannot be influenced; in addition, an interpenetrating network structure is formed between the electromagnetic shielding layer 5 and the first flexible substrate 6 at the contact surface, so that the electromagnetic shielding layer 5 and the first flexible substrate 6 are not easy to peel off, and the stability of the structure of the flexible liquid crystal display panel 1 is improved.
As shown in fig. 3, an embodiment of the present application further provides a method for manufacturing a flexible liquid crystal display panel, including steps S301 to S305.
Step S301: a first glass substrate and a second glass substrate are provided.
Step S302: sequentially forming an electromagnetic shielding layer and a first flexible substrate on a first glass substrate; wherein the material of the electromagnetic shielding layer comprises a transparent conductive polymer.
Specifically, as shown in fig. 4, the electromagnetic shield layer 5 and the first flexible substrate 2 are sequentially stacked on the first glass substrate 10. Wherein the first flexible substrate 2 comprises a first flexible substrate 6 arranged on the side of the electromagnetic shielding layer 5 close to the liquid crystal layer 4. Of course, some functional structures, such as a light shielding layer or a common electrode, may also be disposed on the side of the first flexible substrate 6 away from the electromagnetic shielding layer 5 as required.
Specifically, in step S302, the electromagnetic shielding layer 5 and the first flexible substrate 6 are formed by a coating process. Coating to form the electromagnetic shielding layer 5 includes two processes of pre-curing and main curing, and coating to form the first flexible substrate 6 also includes two processes of pre-curing and main curing, it is understood that the main curing process of the electromagnetic shielding layer 5 and the main curing process of the first flexible substrate 6 can be performed simultaneously to reduce one main curing process. And the coating process is simple, thereby being beneficial to reducing the difficulty of the manufacturing process and reducing the manufacturing cost.
Specifically, the transparent conductive polymer is a cross-linked network structure, and the cross-linked network structure enables the electromagnetic shielding layer 5 to have high flexibility, i.e., good bending performance.
In one embodiment, the transparent conductive polymer comprises a transparent conductive polyimide. Specifically, the transparent conductive polyimide is composed of polyimide with a cross-linked network structure and conductive particles dispersed in the polyimide, wherein the conductive particles include metal particles or a mixture of the metal particles and carbon powder, for example, the metal particles are copper particles or silver particles.
Specifically, the material of the first flexible substrate 6 is transparent polyimide; and an interpenetrating network structure is formed on the contact surface of the electromagnetic shielding layer 5 and the first flexible substrate 6. Since the transparent conductive polymer (e.g., the transparent conductive polyimide) in the electromagnetic shielding layer 5 has a plurality of molecular branches, and the transparent polyimide in the first flexible layer also has a plurality of molecular branches, when the first flexible substrate 6 is covered on the electromagnetic shielding layer 5 to form a contact surface, the plurality of molecular branches of the transparent conductive polymer in the electromagnetic shielding layer 5 and the plurality of molecular branches of the transparent polyimide in the first flexible substrate 6 are cross-linked with each other at the position of the contact surface to form an interpenetrating network structure. The formation of the interpenetrating network structure is beneficial to firmer combination between the electromagnetic shielding layer 5 and the first flexible substrate 6, so that the electromagnetic shielding layer 5 and the first flexible substrate 6 are not easy to peel off.
Specifically, the light transmittance of the electromagnetic shielding layer 5 is greater than 90%, and the light transmittance of the first flexible substrate 6 is also greater than 90%.
Specifically, the thickness of the electromagnetic shielding layer 5 is smaller than the thickness of the first flexible substrate 6.
Step S303: a second flexible substrate is formed on the second glass substrate.
Specifically, as shown in fig. 5, the second flexible substrate 3 is located on the second glass substrate 11, and the second flexible substrate 3 includes a second flexible substrate 7, a TFT array layer 8 and a color filter 9, which are sequentially disposed on the second glass substrate 11.
Specifically, the second flexible substrate 7 is made of transparent polyimide, and the second flexible substrate 7 is formed on the second glass substrate 11 by a coating process, for example, first, a transparent polyamic acid solution is uniformly coated on the second glass substrate 11, then, a solvent is removed by pre-curing, and finally, the transparent polyamic acid is imidized by main curing to form the transparent polyimide, so as to obtain the second flexible substrate 7.
Step S304: the first flexible substrate and the second flexible substrate are arranged in a cell-to-cell manner, and a liquid crystal layer is formed between the first flexible substrate and the second flexible substrate.
As shown in fig. 6, the liquid crystal layer 4 is located between the first flexible substrate 2 and the second flexible substrate 3, and particularly between the first flexible substrate 2 and the color filter 9.
Step S305: and removing the first glass substrate and the second glass substrate to form the flexible liquid crystal display panel.
As shown in fig. 7, the flexible liquid crystal display panel 1 is formed to include a first flexible substrate 2 and a second flexible substrate 3 which are oppositely disposed, a liquid crystal layer 4 disposed between the first flexible substrate 2 and the second flexible substrate 3, and an electromagnetic shield layer 5 disposed on a side of the first flexible substrate 2 away from the liquid crystal layer 4.
Specifically, in step S305, removing the first glass substrate and the second glass substrate includes the following steps:
and stripping the first glass substrate from the electromagnetic shielding layer by adopting a laser stripping process, and stripping the second glass substrate from the second flexible substrate.
Specifically, the wavelength of the laser in the laser lift-off process is 308 nm; the electromagnetic shield layer 5 has a transmittance to laser light of 0. Since the transmittance of the electromagnetic shielding layer 5 to the peeling laser is 0, the laser can be effectively absorbed by the electromagnetic shielding layer 5 during peeling, and high heat is generated at the contact surface of the first glass substrate 10 and the electromagnetic shielding layer 5, which is beneficial to successfully peeling the first glass substrate 10 from the electromagnetic shielding layer 5.
It should be noted that the structures of the first flexible substrate 2 and the second flexible substrate 3 in the method for manufacturing the flexible liquid crystal display panel provided in this embodiment are not limited to the above-described structures, and this embodiment is only illustrated by a COA type display panel. It will be appreciated that the color filter 9 may also be provided in the first flexible substrate 2, i.e. on the first flexible substrate 6, in which case the color filter 9 is not provided in the second flexible substrate 3.
In the embodiment, the electromagnetic shielding layer 5 is arranged on the side of the first flexible substrate 2 away from the second flexible substrate 3, so that the electromagnetic shielding performance of the flexible liquid crystal display panel 1 can be obviously improved, and the display effect can be improved; the electromagnetic shielding layer 5 is made of a transparent conductive polymer with a cross-linked network structure, on one hand, the electromagnetic shielding layer 5 can be formed by simple processes such as coating and the like when being manufactured, and on the other hand, the transparent conductive polymer is made of a high polymer material and has a cross-linked network structure, so that the electromagnetic shielding layer 5 has good flexibility and the bending performance of the flexible liquid crystal display panel 1 cannot be influenced; in addition, an interpenetrating network structure is formed between the electromagnetic shielding layer 5 and the first flexible substrate 6 at the contact surface, so that the electromagnetic shielding layer 5 and the first flexible substrate 6 are not easy to peel off, and the stability of the structure of the flexible liquid crystal display panel 1 is improved.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The flexible liquid crystal display panel and the manufacturing method thereof provided by the embodiment of the present application are described in detail above, a specific example is applied in the description to explain the principle and the implementation manner of the present application, and the description of the above embodiment is only used to help understanding the technical scheme and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims (10)

1. The flexible liquid crystal display panel is characterized by comprising a first flexible substrate, a second flexible substrate, a liquid crystal layer and an electromagnetic shielding layer, wherein the first flexible substrate and the second flexible substrate are arranged oppositely, the liquid crystal layer is arranged between the first flexible substrate and the second flexible substrate, and the electromagnetic shielding layer is arranged on one side, far away from the liquid crystal layer, of the first flexible substrate;
the material of the electromagnetic shielding layer comprises a transparent conductive polymer.
2. The flexible liquid crystal display panel of claim 1, wherein the transparent conductive polymer is a cross-linked network structure.
3. The flexible liquid crystal display panel of claim 1, wherein the transparent conductive polymer comprises a transparent conductive polyimide.
4. The flexible liquid crystal display panel of claim 1, wherein the first flexible substrate comprises a first flexible substrate and a color filter, which are sequentially disposed on one side of the electromagnetic shielding layer close to the liquid crystal layer; the second flexible substrate comprises a second flexible substrate and a TFT array layer, wherein the second flexible substrate is arranged opposite to the first flexible substrate, and the TFT array layer is positioned on one side, close to the liquid crystal layer, of the second flexible substrate.
5. The flexible liquid crystal display panel of claim 1, wherein the first flexible substrate comprises a first flexible substrate disposed on a side of the electromagnetic shielding layer adjacent to the liquid crystal layer; the second flexible substrate comprises a second flexible substrate arranged opposite to the first flexible substrate, and a TFT array layer and a color filter which are sequentially arranged on one side, close to the liquid crystal layer, of the second flexible substrate.
6. The flexible liquid crystal display panel of claim 4 or 5, wherein an interpenetrating network structure is formed at a contact surface of the electromagnetic shielding layer and the first flexible substrate.
7. The flexible liquid crystal display panel of claim 1, wherein the electromagnetic shielding layer has a light transmittance of greater than 90%.
8. A manufacturing method of a flexible liquid crystal display panel is characterized by comprising the following steps:
providing a first glass substrate and a second glass substrate;
sequentially forming an electromagnetic shielding layer and a first flexible substrate on the first glass substrate; wherein the material of the electromagnetic shielding layer comprises a transparent conductive polymer;
forming a second flexible substrate on the second glass substrate;
arranging the first flexible substrate and the second flexible substrate in a box-to-box mode, and forming a liquid crystal layer between the first flexible substrate and the second flexible substrate;
and removing the first glass substrate and the second glass substrate to form the flexible liquid crystal display panel.
9. The method of claim 8, wherein the removing the first glass substrate and the second glass substrate comprises:
and peeling the first glass substrate from the electromagnetic shielding layer by adopting a laser peeling process, and peeling the second peeled substrate from the second flexible substrate.
10. The method of claim 9, wherein the laser in the laser lift-off process has a wavelength of 308 nm; the electromagnetic shielding layer has a transmittance of 0 to the laser light.
CN202011110220.1A 2020-10-16 2020-10-16 Flexible liquid crystal display panel and manufacturing method thereof Pending CN112255828A (en)

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CN (1) CN112255828A (en)

Citations (4)

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