Curved liquid crystal display device and method for manufacturing the same

Abstract

An embodiment of the present invention provides a curved liquid crystal display device and a preparation method thereof. By setting the first array substrate and the first opposing substrate of the first liquid crystal display panel as glass substrates, and setting the second opposing substrate and the second array substrate of the second liquid crystal display panel as flexible substrates, the structure of the curved liquid crystal display device can be simplified, the product yield can be improved, and the cost of the curved liquid crystal display device can be reduced. At the same time, the first liquid crystal display panel and the second liquid crystal display panel after bending can have an accurate alignment relationship, thereby improving the uneven display phenomenon of the curved liquid crystal display device and improving the display effect of the curved liquid crystal display device.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a curved liquid crystal display device and a preparation method thereof. Background Art

[0002] With the development of display technology, people have higher and higher requirements on the display effects of display devices. For example, a liquid crystal display device is set to a dual-screen structure to enable the liquid crystal display device to achieve three-dimensional display, or to enable the liquid crystal display device to achieve local dimming function, etc., to improve the resolution of the liquid crystal display device.

[0003] A dual-screen liquid crystal display device generally includes two liquid crystal display panels and a backlight module, and the backlight module provides light sources for the two liquid crystal display panels, so that the two liquid crystal display panels cooperate with each other to achieve three-dimensional display or local dimming functions, etc. In the prior art, in order to further improve the display effect of the dual-screen liquid crystal display device, the dual-screen liquid crystal display device is set to a curved shape, that is, a curved screen, to meet the display requirements at different viewing angles.

[0004] However, in a curved dual-screen liquid crystal display device, the two liquid crystal display panels have different curvature radii when bent, resulting in inaccurate pixel alignment between the two liquid crystal display panels, resulting in uneven display and affecting the display effect. Summary of the invention

[0005] The embodiment of the present invention provides a curved liquid crystal display device and a manufacturing method thereof to solve the technical problem in the prior art that two liquid crystal display panels of the curved liquid crystal display device have inaccurate pixel alignment, resulting in uneven display and affecting the display effect of the curved liquid crystal display device.

[0006] In a first aspect, an embodiment of the present invention provides a curved liquid crystal display device, comprising:

[0007] A first liquid crystal display panel, wherein the first liquid crystal display panel comprises a first array substrate and a first opposing substrate arranged opposite to the first array substrate, wherein both the first array substrate and the first opposing substrate are glass substrates;

[0008] a second liquid crystal display panel, wherein the second liquid crystal display panel comprises a second array substrate and a second opposing substrate arranged opposite to the second array substrate, wherein both the second array substrate and the second opposing substrate are flexible substrates;

[0009] a backlight module, wherein the backlight module is located on a side of the second array substrate away from the second opposing substrate; the first array substrate is located on a side of the second opposing substrate away from the second array substrate; and the first opposing substrate is located on a side of the first array substrate away from the second opposing substrate;

[0010] Wherein, the first liquid crystal display panel, the second liquid crystal display panel and the backlight module are bent in the same direction.

[0011] In a second aspect, an embodiment of the present invention provides a method for manufacturing a curved liquid crystal display device, comprising:

[0012] A first liquid crystal display panel is provided; the first liquid crystal display panel comprises a first array substrate and a first opposing substrate arranged opposite to the first array substrate, wherein the first array substrate and the first opposing substrate are both glass substrates;

[0013] An initial liquid crystal display panel of a second liquid crystal display panel is provided; the second liquid crystal display panel comprises a second array substrate and a second opposing substrate arranged opposite to the second array substrate, wherein the second array substrate and the second opposing substrate are both flexible substrates; the initial liquid crystal display panel comprises a second array substrate, a second opposing substrate, a first glass substrate substrate and a second glass substrate substrate; wherein the second array substrate is located on a side of the first glass substrate substrate close to the second glass substrate substrate, and the second opposing substrate is located on a side of the second array substrate close to the second glass substrate substrate;

[0014] peeling off the first glass substrate and the second glass substrate of the initial liquid crystal display panel;

[0015] Laminating a side of the second opposing substrate away from the second array substrate to a side of the first array substrate away from the first opposing substrate;

[0016] Providing a curved backlight module;

[0017] The side of the second array substrate facing away from the second opposing substrate is attached to the backlight module along the bending direction of the backlight module; wherein the first liquid crystal display panel, the second liquid crystal display panel and the backlight module are bent in the same direction.

[0018] In a third aspect, an embodiment of the present invention provides a method for manufacturing a curved liquid crystal display device, comprising:

[0019] A first liquid crystal display panel is provided; the first liquid crystal display panel comprises a first array substrate and a first opposing substrate arranged opposite to the first array substrate, wherein the first array substrate and the first opposing substrate are both glass substrates;

[0020] An initial liquid crystal display panel of a second liquid crystal display panel is provided; the second liquid crystal display panel comprises a second array substrate and a second opposing substrate arranged opposite to the second array substrate, wherein the second array substrate and the second opposing substrate are both flexible substrates; the initial liquid crystal display panel comprises a second array substrate, a second opposing substrate, a first glass substrate substrate and a second glass substrate substrate; wherein the second array substrate is located on a side of the first glass substrate substrate close to the second glass substrate substrate, and the second opposing substrate is located on a side of the second array substrate close to the second glass substrate substrate;

[0021] peeling off the second glass substrate of the initial liquid crystal display panel;

[0022] Laminating a side of the second opposing substrate away from the second array substrate to a side of the first array substrate away from the first opposing substrate;

[0023] peeling off the first glass substrate of the initial liquid crystal display panel;

[0024] Providing a curved backlight module;

[0025] The side of the second array substrate facing away from the second opposing substrate is attached to the backlight module along the bending direction of the backlight module; wherein the first liquid crystal display panel, the second liquid crystal display panel and the backlight module are bent in the same direction.

[0026] An embodiment of the present invention provides a curved liquid crystal display device and a preparation method thereof. The curved liquid crystal display panel includes a first liquid crystal display panel, a second liquid crystal display panel and a backlight module; the first array substrate and the first opposing substrate of the first liquid crystal display panel are both glass substrates, and the second array substrate and the second opposing substrate of the second liquid crystal display panel are both flexible substrates; the first liquid crystal display panel is bonded to the second liquid crystal display panel and then bonded to the curved backlight module to form a curved liquid crystal display device that is bent toward one side. According to the curved liquid crystal display device of the embodiment of the present invention, in the first aspect, the curved liquid crystal display device formed by bending the first liquid crystal display panel and the second liquid crystal display panel can achieve a smaller curvature radius, so that the curved liquid crystal display device has a wider range of applications; in the second aspect, the first liquid crystal display panel composed of a glass substrate can be used as a supporting structure for the second liquid crystal display panel to prevent the second liquid crystal display panel from further bending and deformation, and to maintain the curved surface of the curved liquid crystal display device, so that there is no need to set up a separate supporting structure for the second liquid crystal display panel, which can simplify the structure of the curved liquid crystal display device and reduce the cost of the curved liquid crystal display device; in the third aspect, the second liquid crystal display panel can protect the first liquid crystal display panel during the bending process, and prevent cracks from occurring in the first liquid crystal display panel during the bending process; at the same time, the second liquid crystal display panel can deform in accordance with the first liquid crystal display panel, which can ensure that the first liquid crystal display panel and the second liquid crystal display panel have a more accurate alignment relationship after bending, thereby improving the display uniformity of the curved liquid crystal display device, and further improving the display effect of the curved liquid crystal display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of a film layer structure of a curved liquid crystal display device provided by an embodiment of the present invention;

[0028] Figure 2 is a schematic diagram of a film layer structure of another curved liquid crystal display device provided by an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of a film layer structure of another curved liquid crystal display device provided by an embodiment of the present invention;

[0030] Figure 4 is a schematic diagram of a film layer structure of another curved liquid crystal display device provided by an embodiment of the present invention;

[0031] Figure 5 is a schematic diagram of a film layer structure of another curved liquid crystal display device provided by an embodiment of the present invention;

[0032] Figure 6 is a schematic diagram of a film layer structure of another curved liquid crystal display device provided by an embodiment of the present invention;

[0033] Figure 7 is a schematic diagram of a top view of a curved liquid crystal display device provided by an embodiment of the present invention;

[0034] Figure 8 is a schematic diagram of a film layer structure of another curved liquid crystal display device provided by an embodiment of the present invention;

[0035] Fig. 9 is a schematic diagram of a top view of another curved liquid crystal display device provided by an embodiment of the present invention;

[0036] Fig.10 is with Fig. 9 A corresponding schematic diagram of a film layer structure of a curved liquid crystal display device;

[0037] Fig.11 is a flow chart of a method for preparing a curved liquid crystal display device provided by an embodiment of the present invention;

[0038] Fig.12 is with Fig.11 A schematic diagram of the film structure of a corresponding preparation process of a curved liquid crystal display device;

[0039] Fig.13 is a flow chart of another method for preparing a curved liquid crystal display device provided by an embodiment of the present invention;

[0040] Fig.14 is with Fig.13 A schematic diagram of the film layer structure of a corresponding preparation process of a curved liquid crystal display device. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0042] A liquid crystal display device generally includes a liquid crystal display panel and a backlight module disposed on the back of the liquid crystal display panel, and the backlight module can be used to provide light source for the liquid crystal display panel. The liquid crystal display panel includes a color filter (CF) substrate and a thin film transistor (TFT) array substrate, and a liquid crystal layer located between the CF substrate and the TFT substrate. The working principle of the liquid crystal display device is to control the rotation of liquid crystal molecules in the liquid crystal layer by applying a driving voltage, and the light source provided by the backlight module is transmitted through the TFT array substrate of the liquid crystal display panel, refracted from the liquid crystal layer of the liquid crystal display panel, and produces a color picture through the CF substrate.

[0043] As people's requirements for display images are getting higher and higher, in order to meet different display requirements, two liquid crystal display panels and a backlight module can be set in the liquid crystal display device. Among them, the backlight module provides light sources for the two liquid crystal display panels, and the two liquid crystal display panels cooperate with each other to display corresponding images. For example, by setting two liquid crystal display panels in the liquid crystal display device, the liquid crystal display device can realize the local dimming function, so that the dark area of ​​the liquid crystal display device can be darker and the bright area can be brighter during display, thereby improving the contrast of the liquid crystal display device and further improving the resolution of the liquid crystal display device. When the liquid crystal display device with the local dimming function is set to a curved shape, it can meet the display requirements under different viewing angles.

[0044] However, in order to meet the corresponding curvature radius requirements, in the prior art, the two liquid crystal display panels of the curved liquid crystal display device are bent separately and then bonded together. Since the bent liquid crystal display panel is deformed, the deformation conditions of the two liquid crystal display panels are different during the bending process, resulting in inaccurate alignment after bonding, resulting in uneven display, which affects the display effect of the liquid crystal display device.

[0045] In order to solve the above problems, an embodiment of the present invention provides a curved liquid crystal display device, comprising:

[0046] A first liquid crystal display panel, the first liquid crystal display panel comprising a first array substrate and a first opposing substrate arranged opposite to the first array substrate, and both the first array substrate and the first opposing substrate are glass substrates;

[0047] A second liquid crystal display panel, the second liquid crystal display panel comprising a second array substrate and a second opposing substrate arranged opposite to the second array substrate, and both the second array substrate and the second opposing substrate are flexible substrates;

[0048] A backlight module, the backlight module is located on the side of the second array substrate away from the second opposing substrate; the first array substrate is located on the side of the second opposing substrate away from the second array substrate; the first opposing substrate is located on the side of the first array substrate away from the second opposing substrate; wherein the first liquid crystal display panel, the second liquid crystal display panel and the backlight module are bent in the same direction.

[0049] According to the above technical solution, in the first aspect, the first array substrate and the first opposing substrate of the first liquid crystal display panel are glass substrates, and the second array substrate and the second opposing substrate of the second liquid crystal display panel are flexible substrates. Since the flexible substrate has the property of being easy to bend, the curved liquid crystal display device formed by bending the first liquid crystal display panel and the second liquid crystal display panel after being bonded together can achieve a smaller radius of curvature, thereby making the curved liquid crystal display device have a wider range of applications; in the second aspect, the first array substrate and the first opposing substrate of the first liquid crystal display panel are glass substrates, and the second array substrate and the second opposing substrate of the second liquid crystal display panel are flexible substrates, wherein the flexible substrate has the property of being easy to bend. After the first liquid crystal display panel and the second liquid crystal display panel are bonded together and then bent, the first liquid crystal display panel composed of the glass substrate is used as the supporting structure of the second liquid crystal display panel to prevent the second liquid crystal display panel from further bending and deformation, thereby maintaining the curved screen shape of the curved liquid crystal display device, thereby eliminating the need to provide a separate supporting structure for the second liquid crystal display panel, thereby simplifying the bending process. The structure of the curved liquid crystal display device reduces the cost of the curved liquid crystal display device; in the third aspect, the first array substrate of the first liquid crystal display panel is a glass substrate, the second array substrate and the second opposing substrate of the second liquid crystal display panel are flexible substrates, and the second liquid crystal display panel composed of the flexible substrate has the characteristic of being easy to bend and deform. The first liquid crystal display panel and the second liquid crystal display panel are laminated and then bent, and the second liquid crystal display panel can protect the first liquid crystal display panel during the bending process to prevent cracks from occurring in the first liquid crystal display panel during the bending process; at the same time, the first liquid crystal display panel and the second liquid crystal display panel are laminated and then bent, so that the first liquid crystal display panel and the second liquid crystal display panel are bent at the same time, and the characteristic of the second liquid crystal display panel being easy to bend and deform enables the second liquid crystal display panel to deform in accordance with the first liquid crystal display panel, which can ensure that the first liquid crystal display panel and the second liquid crystal display panel have a more accurate alignment relationship after bending, thereby improving the display uniformity of the curved liquid crystal display device, and further improving the display effect of the curved liquid crystal display device.

[0050] The above is the core idea of ​​the present invention. The technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] In an embodiment of the present invention, a curved liquid crystal display device includes a first liquid crystal display panel, a second liquid crystal display panel, and a backlight module, and the backlight module can provide a light source for the first liquid crystal display panel and the second liquid crystal display panel, so that the first liquid crystal display panel and the second liquid crystal display panel cooperate to display corresponding images, so as to achieve three-dimensional display or have a higher contrast, etc. Among them, the first liquid crystal display panel, the second liquid crystal display panel, and the backlight module of the curved liquid crystal display device are bent in the same direction, that is, the first liquid crystal display panel, the second liquid crystal display panel, and the backlight module of the curved liquid crystal display device can be bent toward the direction of the light emitting side of the curved liquid crystal display device, and can also be bent toward the backlight side of the curved liquid crystal display device away from the light emitting side.

[0052] Figure 1 FIG. 1 is a schematic diagram of a film structure of a curved liquid crystal display device provided by an embodiment of the present invention. Figure 1 As shown, the curved liquid crystal display device 100 includes a first liquid crystal display panel 10, a second liquid crystal display panel 20 and a backlight module 30, and the first liquid crystal display panel 10, the second liquid crystal display panel 20 and the backlight module 30 are all curved in the same direction. The light source provided by the backlight module 30 sequentially passes through the second liquid crystal display panel 20 and the first liquid crystal display panel 10 to reach the light-emitting side 101 of the curved liquid crystal display device 100, so that the curved liquid crystal display device 100 displays the corresponding picture.

[0053] The first liquid crystal display panel 10 includes a first array substrate 11 and a first opposing substrate 12 which are arranged opposite to each other, and a first liquid crystal layer 13 located between the first array substrate 11 and the first opposing substrate 12. The first array substrate 11 and the first opposing substrate 12 are both glass substrates, and the first opposing substrate 12 can be, for example, a color filter substrate of the first liquid crystal display panel 10, so that the first liquid crystal display panel 10 can display a color picture. The second liquid crystal display panel 20 includes a second array substrate 21 and a second opposing substrate 22 which are arranged opposite to each other, and a second liquid crystal layer 23 located between the second array substrate 21 and the second opposing substrate 22. The second array substrate 21 and the second opposing substrate 22 are both flexible substrates, and the material of the flexible substrate can be, for example, polyimide, so that the second liquid crystal display panel 20 has the characteristic of being easy to bend and deform. When the curved liquid crystal display device 100 displays a picture, the first liquid crystal display panel 10 can be combined with the second liquid crystal display panel 20 to achieve a three-dimensional display; or the first liquid crystal display panel 10 can be locally dimmed by the second liquid crystal display panel 20 to make the bright area brighter and the dark area darker, thereby improving the display contrast of the curved liquid crystal display device.

[0054] To meet different display requirements, the display screen of the liquid crystal display device can be set to a curved shape, so as to form a curved liquid crystal display device 100. The display screen of the curved liquid crystal display device 100 includes a first liquid crystal display panel 10 and a second liquid crystal display panel 20. The curved liquid crystal display device 100 is formed by laminating the first liquid crystal display panel 10 and the second liquid crystal display panel 20 and then bending the first liquid crystal display panel 10 and the second liquid crystal display panel 20 at the same time.

[0055] In the prior art, the first opposing substrate and the first array substrate of the first liquid crystal display panel of the curved liquid crystal display device are glass substrates, and the first opposing substrate and the second array substrate of the second liquid crystal display panel are also glass substrates. Therefore, the curved liquid crystal display device of the prior art is composed of two rigid liquid crystal display panels. Since the rigid liquid crystal display panel is difficult to bend and deform, if the two rigid liquid crystal display panels of the curved liquid crystal display device are to be bent to a specific curvature radius, the rigid first liquid crystal display panel and the rigid second liquid crystal display panel in the curved liquid crystal display device can only be bent separately and then bonded. In this way, the curvature radius of the rigid first liquid crystal display panel and the rigid second liquid crystal display panel cannot be accurately controlled, so that the curvature radius of the rigid first liquid crystal display panel and the rigid second liquid crystal display panel cannot be kept consistent, thereby affecting the alignment accuracy of the two liquid crystal display panels in the curved liquid crystal display device. At the same time, in order to ensure the combined characteristics of the first liquid crystal display panel and the second liquid crystal display panel, it is necessary to use the liquid crystal display panel with a smaller curvature radius of the first liquid crystal display panel and the second liquid crystal display panel as a reference for other designs, resulting in the final curvature radius failing to meet actual needs.

[0056] In the embodiment of the present invention, since the second array substrate 21 and the second opposing substrate 22 of the second liquid crystal display panel 20 are both flexible substrates, which are easy to bend and deform, the second liquid crystal display panel 20 cannot maintain its curved shape alone after being bent, and needs to rely on an external support structure to support its curved shape, which will increase the process cost. Since the first array substrate 11 and the first opposing substrate 12 of the first liquid crystal display panel 10 are both glass substrates, the first liquid crystal display panel 10 can maintain its curved shape after being bent. By firstly laminating the side of the second opposing substrate 22 of the second liquid crystal display panel 20 away from the second array substrate 21 with the side of the first array substrate 11 of the first liquid crystal display panel 10 away from the first opposing substrate, and then bending the laminating first liquid crystal display panel 10 and the second liquid crystal display panel 20 at the same time, the second liquid crystal display panel 20 that is laminated with the first liquid crystal display panel 10 and bent at the same time can maintain its curved shape with the first liquid crystal display panel 10 as support.

[0057] At the same time, the second liquid crystal display panel 20 formed by the flexible substrate has the characteristic of being easy to bend and deform, while the first liquid crystal display panel 10 is formed by a glass substrate that is not easy to bend and deform. When the first liquid crystal display panel 10 and the second liquid crystal display panel 20 are bent after being bonded, the second liquid crystal display panel 20 can reduce the bending difficulty of the first liquid crystal display panel 10 and reduce the stress on the first liquid crystal display panel 10 when it is bent, so as to prevent the first liquid crystal display panel 10 from generating cracks, etc., that is, the second liquid crystal display panel 20 can protect the first liquid crystal display panel 10. Accordingly, after the second liquid crystal display panel 20 reduces the bending difficulty of the first liquid crystal display panel 10, the curved liquid crystal display device 100 can achieve a smaller curvature radius, so that the curved liquid crystal display device 100 can have a wider range of applications.

[0058] In addition, when the second opposing substrate 22 of the second liquid crystal display panel 20 faces away from the second array substrate 21 and the first array substrate 11 of the first liquid crystal display panel 10 faces away from the first opposing substrate, they should be accurately aligned to ensure that the first liquid crystal display panel 10 and the second liquid crystal display panel 20 cooperate in display. After the first liquid crystal display panel 10 and the second liquid crystal display panel 20 are aligned and bonded and then bent, the second liquid crystal display panel 20 composed of the flexible substrate and the first liquid crystal display panel 10 composed of the rigid glass substrate can be deformed during the bending process, thereby ensuring that the first liquid crystal display panel 10 and the second liquid crystal display panel 20 still maintain an accurate alignment relationship after bending, thereby preventing the phenomenon of uneven display caused by inaccurate alignment, thereby improving the display effect of the display panel.

[0059] The first liquid crystal display panel 10 and the second liquid crystal display panel 20 are bent after being bonded together. They can be bent directly by corresponding instruments and equipment, or after providing a curved backlight module 30, the first liquid crystal display panel 10 and the second liquid crystal display panel 20 are bent along the curved shape of the backlight module 30; or, the curved liquid crystal display device 100 can also include a glass cover plate 40 to protect other structures of the liquid crystal display device 100. After the first liquid crystal display panel 10 and the second liquid crystal display panel 20 are bonded together, a curved glass cover plate 40 can also be provided, and the curved glass cover plate 40 has the same curved shape and direction as the backlight module 30. The curved liquid crystal display device 100 is formed by bending the first liquid crystal display panel 10 and the second liquid crystal display panel 20 along the curved shape of the glass cover plate 40 and then bonding them to the curved backlight module 30.

[0060] Figure 1The first liquid crystal display panel 10, the second liquid crystal display panel 20 and the backlight module are all bent toward the light-emitting side 101 of the curved liquid crystal display device 100, so that a better narrow viewing angle display effect can be achieved. At the same time, the first liquid crystal display panel 10, the second liquid crystal display panel 20 and the backlight module can also be bent toward the backlight side 102 of the curved liquid crystal display device 100 away from the light-emitting side 101.

[0061] Figure 2 is a schematic diagram of a film layer structure of another curved liquid crystal display device provided by an embodiment of the present invention. Figure 2 Zhongyu Figure 1 The same parts will not be repeated here. Figure 2 and Figure 1 The differences are explained below. Figure 2 The first liquid crystal display panel 10, the second liquid crystal display panel 20 and the backlight module of the curved liquid crystal display device 100 are all bent toward the backlight side 102 of the curved liquid crystal display device 100 away from the light emitting side 101. This can improve the display difference perceived by the human eye at different viewing angles of the curved liquid crystal display device, thereby improving the display effect.

[0062] It should be noted that Figure 1 and Figure 2 All of them are exemplary drawings of embodiments of the present invention. The first liquid crystal display panel 10, the second liquid crystal display panel 20 and the backlight module 30 in the curved liquid crystal display device 100 are all bent in the same direction. The specific bending direction can be determined according to the application scenario of the curved liquid crystal display device. For the convenience of description, the embodiments of the present invention take the bending of the first liquid crystal display panel 10, the second liquid crystal display panel 20 and the backlight module 30 in the curved liquid crystal display device 100 toward the light output side of the curved liquid crystal display device 100 as an example to illustrate the technical solution of the embodiments of the present invention.

[0063] Optional, Figure 3 FIG. 1 is a schematic diagram of a film structure of another curved liquid crystal display device provided by an embodiment of the present invention. Figure 3 A diffusion layer 50 is further disposed between the first liquid crystal display panel 10 and the second liquid crystal display panel 20 . The diffusion layer 50 includes a transparent substrate 51 and diffusion particles 50 dispersed in the transparent substrate.

[0064] The transparent substrate 51 of the diffusion layer 50 is dispersed with diffusion particles 52, which can diffuse the light source provided by the backlight module 30, thereby preventing the first liquid crystal display panel 10 and the second liquid crystal display panel 20 from generating moiré due to different structures. The transparent substrate 51 of the diffusion layer 50 can be, for example, an optical adhesive substrate, which can make the first liquid crystal display panel 10 and the second liquid crystal display panel 20 adhere together without applying another adhesive layer to adhere the first liquid crystal display panel 10 and the second liquid crystal display panel 20, thereby simplifying the structure and facilitating the thinness of the curved liquid crystal display device 100.

[0065] Optional, Figure 4 FIG. 1 is a schematic diagram of a film structure of another curved liquid crystal display device provided by an embodiment of the present invention. Figure 4 The first liquid crystal display panel 10 also includes a first polarizer 14 and a second polarizer 15. The first polarizer 14 is located on a side of the first opposing substrate 12 away from the first array substrate 11, and the second polarizer 15 is located on a side of the first array substrate 11 away from the first opposing substrate 12; the second liquid crystal display panel 20 also includes a third polarizer 24 and a fourth polarizer 25. The third polarizer 24 is located on a side of the second opposing substrate 22 away from the second array substrate 21, and the fourth polarizer 25 is located on a side of the second array substrate 21 away from the second opposing substrate 22.

[0066] The light source provided by the backlight module 30 sequentially passes through the second liquid crystal display panel 20 and the first liquid crystal display panel 10 to reach the light-emitting side 101 to display the picture. The second liquid crystal layer 23 of the second liquid crystal display panel 20 cooperates with the third polarizer 24 and the fourth polarizer 25, so that different areas of the second liquid crystal display panel 20 can have different light transmittances; at the same time, the first liquid crystal layer 13 of the first liquid crystal display panel 10 cooperates with the first polarizer 14 and the second polarizer 15, so that different areas of the first liquid crystal display panel 10 can have different light transmittances, so that the curved liquid crystal display device 100 can display the picture.

[0067] Optional, Figure 5 FIG. 1 is a schematic diagram of a film structure of another curved liquid crystal display device provided by an embodiment of the present invention. Figure 5 The first liquid crystal display panel 10 also includes a first polarizer 14 and a second polarizer 15. The first polarizer 14 is located on a side of the first opposing substrate 12 away from the first array substrate 11, and the second polarizer 15 is located on a side of the first array substrate 11 away from the first opposing substrate 12, so that the first liquid crystal layer 13 of the first liquid crystal display panel 10 cooperates with the first polarizer 14 and the second polarizer 15, so that different areas of the first liquid crystal display panel 10 can have different light transmittances.

[0068] The second liquid crystal display panel 20 further includes a reflective polarizer 26, which is located on the side of the second array substrate 21 away from the second opposing substrate 22, and the reflective polarizer 26 may have a transmission axis and a reflection axis. The light parallel to the transmission axis of the reflective polarizer 26 in the light source provided by the backlight module 30 can be transmitted, so that different areas of the second liquid crystal display panel 20 can have different light transmittances; and the light parallel to the reflection axis of the reflective polarizer 26 in the light source provided by the backlight module 30 will be reflected back to the backlight module 30 to enhance the brightness of the light source provided by the backlight module 30, thereby improving the display effect. At the same time, in the second liquid crystal display panel 20, only one reflective polarizer is provided on the side of the second array substrate 21 away from the second opposing substrate 22, which can reduce the number of polarizers used in the curved liquid crystal display device 100 and reduce the thickness of the curved liquid crystal display device 100.

[0069] Optional, Figure 6 FIG. 1 is a schematic diagram of a film structure of another curved liquid crystal display device provided by an embodiment of the present invention. Figure 6 The first liquid crystal display panel 10 also includes a first polarizer 14 and a second polarizer 15. The first polarizer 14 is located on a side of the first opposing substrate 12 away from the first array substrate 11, and the second polarizer 15 is located on a side of the first array substrate 11 away from the first opposing substrate 12, so that the first liquid crystal layer 13 of the first liquid crystal display panel 10 cooperates with the first polarizer 14 and the second polarizer 15, so that different areas of the first liquid crystal display panel 10 can have different light transmittances.

[0070] The first liquid crystal molecules 131 in the first liquid crystal layer 13 of the first liquid crystal display panel 10 are low-molecular liquid crystals, i.e., liquid crystals with relatively low molecular weights, and the molecular weight M of the low-molecular liquid crystals may be in the range of M≤1000 kg / mol, and the low-molecular liquid crystals exist in the form of single molecules in the first liquid crystal layer 13. The structure of the first liquid crystal molecules 131 is anisotropic, and the first liquid crystal layer 131 may have a corresponding transmittance through the twisting direction of the first liquid crystal molecules 131.

[0071] The second liquid crystal display panel 20 also includes a first electrode 222 and a second electrode 212, and the second liquid crystal layer 23 is located between the first electrode 222 and the second electrode 212; the first electrode 222 is located on a side of the second opposing substrate 22 close to the second array substrate 21, and the second electrode 212 is located on a side of the second array substrate 21 close to the second opposing substrate 22; the second liquid crystal layer 23 includes a high molecular polymer liquid crystal or a polymer network liquid crystal.

[0072] Among them, the first electrode 222 and the second electrode 212 in the second liquid crystal display panel 20 are located on the upper and lower sides of the second liquid crystal layer 23. The first electrode 222 and the second electrode 212 can be transparent electrodes, and the second liquid crystal molecules 231 in the second liquid crystal layer 23 are high molecular polymer liquid crystals or polymer network liquid crystals.

[0073] When the second liquid crystal molecules 231 in the second liquid crystal layer 23 are polymer liquid crystals, the second liquid crystal display panel uses the dielectric anisotropy of the polymer liquid crystal to obtain the electro-optical response characteristics, freely switch between the scattered state and the transparent state, and does not require polarizers and alignment films, which is relatively low in cost and simple in manufacturing process. The polymer liquid crystal may include droplets and polymers, and the droplets may include a plurality of low-molecular liquid crystals. By mixing the droplets with the polymers, the low-molecular liquid crystals are dispersed into a plurality of droplets through the polymers. When no electric field is applied, the low-molecular liquid crystals are freely arranged in the droplets, and the droplets are disorderly arranged in the second liquid crystal layer 23, and the low-molecular liquid crystals and the polymers scatter each other, so that the second liquid crystal display panel 20 forms a dark state; when an electric field is applied, the low-molecular liquid crystals will be arranged in parallel, so that the refractive index of the polymer is consistent with the light refractive index of the low-molecular liquid crystals, and there is no scattering between the polymers and the low-molecular liquid crystals, and the second liquid crystal display panel 20 will be bright.

[0074] When the second liquid crystal molecules 231 of the second liquid crystal layer 23 are polymer network liquid crystals, the second liquid crystal molecules 231 can also obtain electro-optical response characteristics through the dielectric anisotropy of the polymer network liquid crystals, so as to switch freely between the scattered state and the transparent state, without the need for polarizers and alignment films, with relatively low cost and simple manufacturing process. In polymer network liquid crystals, the liquid crystals are not spherical (or ellipsoidal) droplets, but are distributed in a polymer three-dimensional network to form a continuous channel network. When no voltage is applied, the incident light is strongly scattered in the second liquid crystal display panel 20, and the incident light cannot pass through the second liquid crystal display panel 20, so the second liquid crystal display panel 20 is in a dark state; when a certain voltage is applied, the liquid crystal molecules with dielectric anisotropy are subjected to the electric field torque, and the direction of the director will maintain the same direction as the electric field, and the scattering mechanism will collapse, and the incident light can pass through the second liquid crystal display panel 20, so that the second liquid crystal display panel 20 is in a bright state.

[0075] The curved liquid crystal display device of each of the above embodiments is composed of a first liquid crystal display panel, a second liquid crystal display panel and a backlight module, wherein the backlight module can provide a light source for the first liquid crystal display panel and the second liquid crystal display panel, so that the first liquid crystal display panel and the second liquid crystal display panel cooperate with each other to achieve a corresponding display effect. For example, the curved liquid crystal display device can be a liquid crystal display device with a local dimming function, wherein the second liquid crystal display panel can be a display panel for local dimming of the curved liquid crystal display device. The following is an exemplary description of a curved liquid crystal display device with a local dimming function in conjunction with the accompanying drawings.

[0076] Optional, Figure 7 FIG. 1 is a schematic diagram of a top view of a curved liquid crystal display device provided by an embodiment of the present invention. Figure 7 The first liquid crystal display panel 10 includes a plurality of first sub-pixels 110 arranged in an array; the second liquid crystal display panel 20 includes a plurality of second sub-pixels 210 arranged in an array; one second sub-pixel 210 corresponds to and covers at least one first sub-pixel 110 of the first liquid crystal display panel 10.

[0077] The second liquid crystal display panel 20 of the curved liquid crystal display device 100 is located between the first liquid crystal display panel 10 and the backlight module 30. One second sub-pixel 210 of the second liquid crystal display panel 20 corresponds to and covers at least one first sub-pixel 110 of the first liquid crystal display panel 10, that is, the orthographic projection of at least one first sub-pixel 110 of the first liquid crystal display panel 10 is located within the second sub-pixel of the second liquid crystal display panel 20. The light source provided by the backlight module 30 of the curved liquid crystal display device 100 is firstly locally dimmed by the second liquid crystal display panel 20, and then irradiated to the first liquid crystal display panel 10, so that the first liquid crystal display panel 10 displays the picture.

[0078] Optional, continue to refer to Figure 7 Each second sub-pixel 210 covers n 2 first sub-pixels 110 , where n is a positive integer.

[0079] For example, a second sub-pixel 210 of the second liquid crystal display panel 20 may cover 4 2 Since the second sub-pixels 210 arranged in an array of the second liquid crystal display panel 20 may have different transmittances, the second sub-pixels 210 of the second liquid crystal display panel 20 may display different brightnesses; accordingly, the same second sub-pixel 210 covers 4 2 The first sub-pixels 110 may also have different transmittances, so that the second sub-pixel 210 covers the four 2The first sub-pixels 110 display different brightness. The brightness of the final displayed image of the first liquid crystal display panel 10 is the superposition of the second sub-pixel 210 and the first sub-pixel 110. When the contrast of the first liquid crystal display panel 10 is L1:1 and the contrast of the second liquid crystal display panel 20 is L2:1, the contrast of the curved liquid crystal display device 100 can reach L1*L2:1, so that the contrast of the curved liquid crystal display device 100 can be improved, the display resolution can be improved, and thus the display effect of the curved liquid crystal display device 100 can be improved.

[0080] It should be noted that the light transmittance of the plurality of first sub-pixels 110 of the first liquid crystal display panel 10 of the curved liquid crystal display device 100 provided in the embodiment of the present invention can be adjusted by the driving voltage or driving current of the pixel electrode (not shown in the figure) corresponding to the first sub-pixel 110; the light transmittance of the plurality of second sub-pixels 210 of the second liquid crystal display panel 20 can be adjusted by the driving voltage or driving current of the pixel electrode (not shown in the figure) corresponding to the second sub-pixel 210; accordingly, the first liquid crystal display panel 10 and the second liquid crystal display panel 20 can be driven by the same driving chip, or the driving chip can be respectively set in the first liquid crystal display panel 10 and the second liquid crystal display panel 20, and the implementation of the present invention does not make specific restrictions on this. At the same time, the light source of the backlight module 30 of the curved liquid crystal display device 100 in the embodiment of the present invention can be a direct-down type or a side-entry type, and the implementation of the present invention does not make specific restrictions on this.

[0081] Optional, Figure 8 FIG. 1 is a schematic diagram of a film structure of another curved liquid crystal display device provided by an embodiment of the present invention. Figure 8 , the backlight module 30 for the edge-entry light source includes a light-emitting element 31 and a light guide plate 32. The light guide plate 32 is located on the side of the second array substrate 21 away from the second opposing substrate 22, and the light-emitting element 31 is located on one side of the light guide plate 32. The light-emitting element 31 may include, for example, a light-emitting diode, and the light-emitting element 31 is not directly in contact with the side end surface of the light guide plate 32, but the light-emitting element 31 is fixed to a back plate (not shown in the figure), and the back plate can support and protect the light guide plate 32. The light-emitting element 31 is located on the side of the back plate close to the light guide plate 32 and on the side of the light guide plate 32. The surface of the side of the light guide plate 32 close to the light-emitting element 31 intersects with the surface of the side of the light guide plate 32 close to the second liquid crystal display panel 20. The light emitted by the light-emitting element 31 is irradiated to the light guide plate 32 in the X-axis direction, and is irradiated to the second liquid crystal display panel 20 after being transmitted by the light guide plate 32. In this way, the edge-entry backlight module 30 can have a thinner thickness.

[0082] In addition, the backlight module 30 may further include a backlight diffuser 33 and a brightness enhancement film 34 located on the side of the light guide plate 32 close to the second array substrate 21, and a module frame 35 located on the side of the light guide plate 32 away from the second array substrate, and the module frame 35 is used to support the light emitting element 31 and the light guide plate 32. Among them, the backlight diffuser 33 is located between the light guide plate 32 and the brightness enhancement film 34. The thickness of the backlight diffuser 33 is less than that of the light guide plate 32, and the light beam derived from the light guide plate 32 is further diffused by the backlight diffuser 33, and the brightness distribution is more uniform.

[0083] Optional, Fig. 9 is a schematic top view of another curved liquid crystal display device provided by an embodiment of the present invention. Fig.10 is with Fig. 9 A corresponding schematic diagram of the film structure of a curved liquid crystal display device. Fig. 9 and Fig.10 The backlight module 30 of the curved liquid crystal display device 100 can also be a direct-down type, and the backlight module 30 includes a plurality of light-emitting elements 31 and a light guide plate 32; the light guide plate 32 is located on the side of the second array substrate 21 away from the second opposing substrate 22; the light-emitting element 31 is located on the side of the light guide plate 32 away from the second array substrate 21; and the backlight module 30 includes a plurality of light-emitting areas 310 arranged in an array, each light-emitting area 310 includes at least one light-emitting element 31; each light-emitting area 310 covers at least one second sub-pixel 210.

[0084] Among them, the light-emitting area 310 covers multiple second sub-pixels 210, which means that the orthographic projections of the multiple second sub-pixels 210 on the backlight module 30 are located within a light-emitting area 310 of the backlight module 30; the second sub-pixel 210 covers multiple first sub-pixels 110, which means that the orthographic projections of the multiple first sub-pixels 110 on the second liquid crystal display panel 20 are located within a second sub-pixel 210; the light-emitting element 31 may, for example, include a light-emitting diode.

[0085] Exemplary, combined Figure 7 Fig. 9 and Fig.10, each light-emitting area 310 of the backlight module 30 covers four second sub-pixels 210 of the second liquid crystal display panel 20, and each second sub-pixel 210 covers sixteen first sub-pixels 110 of the first liquid crystal display panel 10. The multiple light-emitting areas 310 of the backlight module 30 may have different light-emitting brightness, which can be considered as the first level dimming. The driving voltage or driving current of the light-emitting area 310 of the backlight module 30 may be the driving voltage or driving current of the light-emitting diode 31 in the light-emitting area 310, and the light-emitting brightness of the light-emitting area 310 can be adjusted by the driving voltage or driving current of the light-emitting diode 31. The multiple second sub-pixels 210 covered by the same light-emitting area 310 may have different transmittances, so that the multiple second sub-pixels 210 display different brightnesses, which can be considered as the second level dimming, and the transmittance of the second sub-pixel 210 can be adjusted by the driving voltage or driving current of the pixel electrode 214 corresponding to the second sub-pixel 210. The multiple first sub-pixels 110 covered by the same second sub-pixel 210 may have different transmittances, so that the multiple first sub-pixels 110 display different brightnesses, which can be considered as the third-level dimming. The transmittance of the first sub-pixel 110 can be adjusted by the driving voltage or driving current of the pixel electrode 112 corresponding to the first sub-pixel 110.

[0086] In this way, the backlight module 30 and the second liquid crystal display panel 20 of the curved liquid crystal display device 100 both play a role in local dimming, further improving the image display contrast. At the same time, since a smaller driving voltage or driving current can be provided for the light-emitting area corresponding to the darker position of the picture, the power consumption of the backlight module 30 can be reduced, thereby reducing the power consumption of the curved liquid crystal display device 100 while the curved liquid crystal display device 100 can also achieve multi-level dimming.

[0087] In addition, the direct-type backlight module 30 may also include a diffuser 33 and a brightness enhancement film 34. The light beam derived from the light guide plate 32 is further diffused by the backlight diffuser 33 to make the brightness distribution more uniform. The first opposing substrate 12 of the first liquid crystal display panel 10 may include a glass substrate 121 and a color resist 122, a black matrix 123 and a common electrode 124 located on the side of the glass substrate 121 close to the first liquid crystal layer 13. The color resist 122 may be located between two adjacent black matrices 123, and the area between two adjacent black matrices 123 may be the area where the first sub-pixel 110 is located. The color resist 122 may include, for example, a red color resist, a green color resist and a blue color resist. Light passing through the red color resist displays red, light passing through the green color resist displays green, and light passing through the blue color resist displays blue. The first array substrate of the first liquid crystal display panel 10 may include a glass substrate 111 and a pixel electrode 112 located on the side of the glass substrate 111 close to the first liquid crystal layer 13. The second array substrate 21 of the second liquid crystal display panel 20 may include a flexible substrate 211 and a pixel electrode 213 located on a side of the flexible substrate close to the second liquid crystal layer 23, and the second opposing substrate 22 of the second liquid crystal display panel 20 may include a flexible substrate 221 and a common electrode 223 located on a side of the flexible substrate 221 close to the second liquid crystal layer 23.

[0088] Based on the same inventive concept, an embodiment of the present invention further provides a method for preparing a curved liquid crystal display device. The method for preparing a curved liquid crystal display device can be used to prepare the curved liquid crystal display device provided by an embodiment of the present invention. Fig.11 is a flow chart of a method for preparing a curved liquid crystal display device provided by an embodiment of the present invention. Fig.12 is with Fig.11 A schematic diagram of the film structure of a corresponding curved liquid crystal display device preparation process. Fig.11 and Fig.12 , a method for preparing a curved liquid crystal display device provided by an embodiment of the present invention comprises:

[0089] S110, providing a first liquid crystal display panel 10; the first liquid crystal display panel 10 includes a first array substrate 11 and a first opposing substrate 12 disposed opposite to the first array substrate 11, and both the first array substrate 11 and the first opposing substrate 12 are glass substrates;

[0090] S120, providing an initial liquid crystal display panel 220 of a second liquid crystal display panel 20; the second liquid crystal display panel 20 comprises a second array substrate 21, and a second opposing substrate 22 arranged opposite to the second array substrate 21, and the second array substrate 21 and the second opposing substrate 22 are both flexible substrates; the initial liquid crystal display panel 220 comprises the second array substrate 21, the second opposing substrate 22, a first glass substrate substrate 28 and a second glass substrate substrate 27; wherein the second array substrate 21 is located on a side of the first glass substrate substrate 28 close to the second glass substrate substrate 27, and the second opposing substrate 22 is located on a side of the second array substrate 21 close to the second glass substrate substrate 27;

[0091] S130, peeling off the first glass substrate 28 and the second glass substrate 27 of the initial liquid crystal display panel 220;

[0092] S140, laminating a side of the second opposing substrate 22 away from the second array substrate 21 with a side of the first array substrate 11 away from the first opposing substrate 12;

[0093] S150, providing a curved backlight module 30;

[0094] S160, attaching the side of the second array substrate 21 away from the second opposing substrate 22 to the backlight module 30 along the bending direction of the backlight module 30; wherein the first liquid crystal display panel 10, the second liquid crystal display panel 20 and the backlight module 30 are bent in the same direction.

[0095] The first liquid crystal display panel 10 is formed by injecting the first liquid crystal 13 between the first array substrate 11 and the first opposing substrate 12, attaching polarizers to the side of the first array substrate 11 of the first liquid crystal display panel 10 that is away from the first opposing substrate 12 and to the side of the first opposing substrate that is away from the first array substrate, and bonding a driving chip (not shown in the figure) to the first array substrate 11.

[0096] The second array substrate 21 and the second opposing substrate 22 of the second liquid crystal display panel 20 are both flexible substrates. Therefore, when forming the second array substrate 21 and the second opposing substrate 22 of the second liquid crystal display panel 20, corresponding supporting substrates are required, that is, the first glass substrate 28 can be used as a supporting substrate for the first array substrate 21, and the second glass substrate 27 can be used as a supporting substrate for the second opposing substrate 22. Before the second liquid crystal display panel 20 is formed into a box, the first glass substrate 28 of the second array substrate 21 and the second glass substrate 27 of the second opposing substrate 22 are in an unpeeled state, and the initial liquid crystal display panel 220 of the second liquid crystal display panel 20 is formed into a box. After the first glass substrate 28 and the second glass substrate 27 are peeled off, a polarizer can be attached to the side of the second array substrate 21 away from the second opposing substrate 22 and / or the side of the second opposing substrate 22 away from the second array substrate 21, and a driving chip and the like can be bonded to the second array substrate 21 to form the second liquid crystal display panel 20.

[0097] Since the second array substrate 21 and the second opposing substrate 22 of the second liquid crystal display panel 20 are both flexible substrates, which are easy to bend and deform, the second liquid crystal display panel 20 cannot maintain its curved shape alone after being bent, and needs to rely on an external support structure to support its curved shape, which will increase the process cost. The second array substrate 21 of the second liquid crystal display panel 20 is first bonded to the side of the first array substrate 11 of the first liquid crystal display panel 10 that is away from the first opposing substrate, that is, the formed second liquid crystal display panel 20 is bonded to the unbent first liquid crystal display panel 10, and then the bonded first liquid crystal display panel 10 and the second liquid crystal display panel 20 are bonded to the backlight module 30 along the curved shape of the backlight module 30 at the same time, so as to form a curved liquid crystal display device. Since the first array substrate 11 and the first opposing substrate 12 of the first liquid crystal display panel 10 are both glass substrates, the first liquid crystal display panel 10 can maintain its curved shape after being bent. At this time, the second liquid crystal display panel 20 that is bonded to the first liquid crystal display panel 10 and bent at the same time can maintain its curved shape with the first liquid crystal display panel 10 as support.

[0098] At the same time, the second liquid crystal display panel 20 formed by the flexible substrate has the characteristic of being easy to bend and deform, while the first liquid crystal display panel 10 is formed by a glass substrate that is not easy to bend and deform. After the first liquid crystal display panel 10 and the second liquid crystal display panel 20 are attached to each other, the first liquid crystal display panel 10 and the second liquid crystal display panel 20 are attached to the backlight module 30 along the curved shape of the backlight module 30 at the same time. At this time, the second liquid crystal display panel 20 can reduce the bending difficulty of the first liquid crystal display panel 10 and reduce the stress on the first liquid crystal display panel 10 when it is bent, so as to prevent the first liquid crystal display panel 10 from cracking, etc., that is, the second liquid crystal display panel 20 can protect the first liquid crystal display panel 10. Accordingly, after the second liquid crystal display panel 20 reduces the bending difficulty of the first liquid crystal display panel 10, the curved liquid crystal display device 100 can achieve a smaller radius of curvature, so that the curved liquid crystal display device 100 can have a wider range of applications.

[0099] In addition, when the side of the second opposing substrate 22 of the second liquid crystal display panel 20 facing away from the second array substrate 21 is attached to the side of the first array substrate 11 of the first liquid crystal display panel 10 facing away from the first opposing substrate, the first liquid crystal display panel 10 and the second liquid crystal display panel 20 should be accurately aligned to ensure that the first liquid crystal display panel 10 and the second liquid crystal display panel 20 cooperate in display. After the first liquid crystal display panel 10 and the second liquid crystal display panel 20 are aligned and attached, the first liquid crystal display panel 10 and the second liquid crystal display panel 20 are attached to the backlight module 30 along the curved shape of the backlight module 30 at the same time, so that during the bending process, the second liquid crystal display panel 20 composed of the flexible substrate substrate and the first liquid crystal display panel 10 and the backlight module 30 composed of the rigid glass substrate can be deformed, thereby ensuring that after bending, the first liquid crystal display panel 10 and the second liquid crystal display panel 20 still maintain an accurate alignment relationship, thereby preventing the phenomenon of uneven display caused by inaccurate alignment, thereby improving the display effect of the display panel.

[0100] It should be noted that the second liquid crystal display panel 20 may or may not be provided with a polarizer; when the second liquid crystal display panel 20 is not provided with a polarizer, the step of attaching a polarizer in the manufacturing process of the second liquid crystal display panel 20 may be omitted. Meanwhile, the first liquid crystal display panel 10 and the second liquid crystal display panel 20 may each be provided with a driving chip, or the first liquid crystal display panel 10 and the second liquid crystal display panel may share a driving chip, which is not specifically limited in the embodiment of the present invention.

[0101] In the embodiment of the present invention, the first liquid crystal display panel and the second liquid crystal display panel can be formed separately and then bonded together, or the second glass substrate substrate of the second opposing substrate in the second liquid crystal display panel can be peeled off and then bonded to the first liquid crystal display panel, and then the first glass substrate substrate of the second array substrate in the second liquid crystal display panel can be peeled off and then a polarizer can be attached, a driving chip can be bonded, etc.

[0102] Based on the same inventive concept, an embodiment of the present invention further provides a method for preparing a curved liquid crystal display device, which can be used to prepare the curved liquid crystal display device of the embodiment of the present invention. Fig.13 is a flow chart of another method for preparing a curved liquid crystal display device provided by an embodiment of the present invention. Fig.14 is with Fig.13 A schematic diagram of the film structure of a corresponding curved liquid crystal display device preparation process. Fig.13 and Fig.14 , a method for preparing a curved liquid crystal display device provided by an embodiment of the present invention comprises:

[0103] S210 provides a first liquid crystal display panel; the first liquid crystal display panel includes a first array substrate and a first opposing substrate arranged opposite to the first array substrate, and the first array substrate and the first opposing substrate are both glass substrates;

[0104] S220, providing an initial liquid crystal display panel of a second liquid crystal display panel; the second liquid crystal display panel comprises a second array substrate, and a second opposing substrate arranged opposite to the second array substrate, wherein the second array substrate and the second opposing substrate are both flexible substrates; the initial liquid crystal display panel comprises a second array substrate, a second opposing substrate, a first glass substrate substrate and a second glass substrate substrate; wherein the second array substrate is located on a side of the first glass substrate substrate close to the second glass substrate substrate, and the second opposing substrate is located on a side of the second array substrate close to the second glass substrate substrate;

[0105] S230, peeling off the second glass substrate of the initial liquid crystal display panel;

[0106] S240, laminating a side of the second opposing substrate away from the second array substrate to a side of the first array substrate away from the first opposing substrate;

[0107] S250, peeling off the first glass substrate of the initial liquid crystal display panel;

[0108] S260, providing a curved backlight module;

[0109] S270, attaching the side of the second array substrate away from the second opposing substrate to the backlight module along the bending direction of the backlight module; wherein the first liquid crystal display panel, the second liquid crystal display panel and the backlight module are bent in the same direction.

[0110] The first liquid crystal display panel 10 is formed by injecting the first liquid crystal 13 between the first array substrate 11 and the first opposing substrate 12, attaching polarizers to the side of the first array substrate 11 of the first liquid crystal display panel 10 that is away from the first opposing substrate 12 and to the side of the first opposing substrate that is away from the first array substrate, and bonding a driving chip (not shown in the figure) to the first array substrate 11.

[0111] The second array substrate 21 and the second opposing substrate 22 of the second liquid crystal display panel 20 are both flexible substrates, so when forming the second array substrate 21 and the second opposing substrate 22 of the second liquid crystal display panel 20, corresponding supporting substrates are required, that is, the first glass substrate 28 can be used as a supporting substrate for the first array substrate 21, and the second glass substrate 27 can be used as a supporting substrate for the second opposing substrate 22. Before the second liquid crystal display panel 20 is formed into a box, the first glass substrate 28 of the second array substrate 21 and the second glass substrate 27 of the second opposing substrate 22 are in an unpeeled state, and after forming into a box, an initial liquid crystal display panel 220 of the second liquid crystal display panel 20 is formed.

[0112] The second glass substrate 27 of the initial liquid crystal display panel 220 formed after the box is formed can be peeled off, and a polarizing film is attached to the side of the second opposing substrate 22 away from the second array substrate 21, and then the side of the second opposing substrate 22 away from the second array substrate 21 is directly bonded to the side of the first array substrate 11 away from the first opposing substrate 12; then the first glass substrate 28 of the initial liquid crystal display panel 220 is peeled off, and a polarizing film is attached to the side of the second array substrate 21 away from the second opposing substrate 22, and the driving chip is bonded to the second array substrate 21. In this way, when attaching the polarizing film and bonding the driving chip, the second liquid crystal display panel does not need a corresponding support structure, thereby reducing the process cost. Finally, the side of the second array substrate 21 away from the second opposing substrate 22 is bonded to the curved backlight module 30 to form a curved liquid crystal display device.

[0113] After peeling off the first glass substrate 28 and attaching the polarizer and bonding the driver chip, the bonding structure of the first liquid crystal display panel 10 and the second liquid crystal display panel 20 is formed. When the bonding structure is bonded to the backlight module 30 along the curved shape of the backlight module 30, the second liquid crystal display panel 20 can reduce the bending difficulty of the first liquid crystal display panel 10 and reduce the stress of the first liquid crystal display panel 10 when bending, so as to prevent the first liquid crystal display panel 10 from cracking, that is, the second liquid crystal display panel 20 can protect the first liquid crystal display panel 10. Accordingly, after the second liquid crystal display panel 20 reduces the bending difficulty of the first liquid crystal display panel 10, the curved liquid crystal display device 100 can achieve a smaller radius of curvature, so that the curved liquid crystal display device 100 can have a wider range of applications.

[0114] In addition, after bonding, the side of the second opposing substrate 22 facing away from the second array substrate 21 is accurately aligned with the side of the first array substrate 11 facing away from the first opposing substrate to ensure that the first liquid crystal display panel 10 and the second liquid crystal display panel 20 cooperate in display. At this time, it is bonded to the backlight module 30 along the curved shape of the backlight module 30. During the bending process, the second liquid crystal display panel 20 composed of the flexible substrate substrate and the first liquid crystal display panel 10 and the backlight module 30 composed of the rigid glass substrate are deformed, thereby ensuring that after bending, the first liquid crystal display panel 10 and the second liquid crystal display panel 20 still maintain an accurate alignment relationship, thereby preventing the occurrence of uneven display caused by inaccurate alignment, thereby improving the display effect of the display panel.

[0115] In the embodiment of the present invention, a diffusion layer may be provided on the side of the second opposing substrate away from the second array substrate and the side of the first array substrate away from the first opposing substrate to eliminate the display moiré caused by the structural difference between the first liquid crystal display panel and the second liquid crystal display panel during display. The diffusion layer may be formed by directly coating the side of the second opposing substrate away from the second array substrate before the side of the second opposing substrate away from the second array substrate and the side of the first array substrate away from the first opposing substrate are bonded together, or a diffusion sheet may be provided.

[0116] Optionally, based on the above embodiment, before laminating the side of the second opposing substrate away from the second array substrate with the side of the first array substrate away from the first opposing substrate, the following method is also included: coating a diffusion layer on the side of the second opposing substrate away from the second array substrate; the diffusion layer includes a transparent substrate and diffusion particles dispersed in the transparent substrate; at this time, the side of the second opposing substrate away from the second array substrate and the side of the first array substrate away from the first opposing substrate are laminated through the diffusion layer.

[0117] Before the diffusion layer is coated on the side of the second opposing substrate away from the second array substrate, the second glass substrate substrate on the side of the second opposing substrate away from the second array substrate needs to be peeled off, and at this time, the first glass substrate substrate on the side of the second array substrate away from the second opposing substrate may have been peeled off or not. The transparent base material of the diffusion layer may be, for example, an optical adhesive base material, so that there is no need to provide an additional adhesive layer, and the side of the second opposing substrate away from the second array substrate and the side of the first array substrate away from the first opposing substrate can be bonded through the diffusion layer.

[0118] Optionally, based on the above embodiment, before laminating the side of the second opposing substrate away from the second array substrate with the side of the first array substrate away from the first opposing substrate, the following steps are further included: providing a diffusion sheet; the diffusion sheet includes a diffusion layer, a first protective film, and a second protective film, the first protective film is located on the first side of the diffusion layer, and the second protective film is located on the second side of the diffusion layer; the diffusion layer includes a transparent substrate and diffusion particles dispersed in the transparent substrate; peeling off the first protective film of the diffusion sheet; laminating the first side of the diffusion layer with the side of the second opposing substrate away from the second array substrate; peeling off the second protective film of the diffusion sheet. At this time, the second side of the diffusion layer can be laminated with the side of the first array substrate away from the first opposing substrate, so as to achieve laminating the side of the second opposing substrate away from the second array substrate with the side of the first array substrate away from the first opposing substrate.

[0119] Before laminating the first side of the diffusion layer with the side of the second opposing substrate away from the second array substrate, the second glass substrate substrate on the side of the second opposing substrate away from the second array substrate needs to be peeled off, and at this time, the first glass substrate substrate on the side of the second array substrate away from the second opposing substrate may have been peeled off or not peeled off. The transparent substrate of the diffusion layer may be, for example, an optical adhesive substrate, so that there is no need to provide an additional adhesive layer, and the side of the second opposing substrate away from the second array substrate and the side of the first array substrate away from the first opposing substrate can be laminated through the diffusion layer. The first protective film and the second protective film may be, for example, release films.

[0120] In an embodiment of the present invention, a side of the second opposing substrate facing away from the second array substrate is bonded to a side of the first array substrate facing away from the first opposing substrate, and after forming a bonding structure of the first liquid crystal display panel and the second liquid crystal display panel, the bonding structure of the first liquid crystal display panel and the second liquid crystal display panel are bent simultaneously. When bending the bonding structure of the first liquid crystal display panel and the second liquid crystal display panel, the bonding structure of the first liquid crystal display panel and the second liquid crystal display panel can be bonded to the backlight module along the bending direction of the backlight module. Other bending structures can also be provided, so that the bonding structure of the first liquid crystal display panel and the second liquid crystal display panel is bent along other bending structures and then bonded to the backlight module.

[0121] Optionally, based on the above embodiment, after bonding the side of the second opposing substrate away from the second array substrate with the side of the first array substrate away from the first opposing substrate, the method further includes: providing a curved glass cover plate; bonding the side of the first opposing substrate away from the first array substrate with the glass cover plate along the bending direction of the glass cover plate; and the glass cover plate and the backlight module are bent in the same direction.

[0122] In this way, the bonding structure of the first liquid crystal display panel and the second liquid crystal display panel is bonded to the curved glass cover plate along the bending direction of the curved glass cover plate, thereby forming the curved structure of the first liquid crystal display panel and the second liquid crystal display panel, and then bonded to the backlight module in the same bending direction. Before bonding the bonding structure of the first liquid crystal display panel and the second liquid crystal display panel to the curved glass cover plate along the bending direction of the curved glass cover plate, the first glass substrate substrate on the side of the second array substrate away from the second opposing substrate can be peeled off, and the process of bonding the polarizer and bonding the driver chip has been completed; or, before bonding the bonding structure of the first liquid crystal display panel and the second liquid crystal display panel to the curved glass cover plate along the bending direction of the curved glass cover plate, the first glass substrate substrate on the side of the second array substrate away from the second opposing substrate has not been peeled off, but is bonded to the glass cover plate and then the glass substrate substrate is peeled off, and the process of bonding the polarizer and bonding the driver chip is performed, and then bonded to the curved backlight module.

[0123] The embodiment of the present invention can simplify the structure of a curved liquid crystal display device, improve product yield, and reduce the cost of the curved liquid crystal display device by setting the first array substrate and the first opposing substrate of the first liquid crystal display panel as glass substrates and the second opposing substrate and the second array substrate of the second liquid crystal display panel as flexible substrates. At the same time, it can enable the first liquid crystal display panel and the second liquid crystal display panel to have an accurate alignment relationship after bending, improve the uneven display phenomenon of the curved liquid crystal display device, and improve the display effect of the curved liquid crystal display device.

[0124] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for preparing a curved liquid crystal display device, characterized in that: include: A first liquid crystal display panel is provided; the first liquid crystal display panel comprises a first array substrate and a first opposing substrate arranged opposite to the first array substrate, wherein the first array substrate and the first opposing substrate are both glass substrates; An initial liquid crystal display panel of a second liquid crystal display panel is provided; the second liquid crystal display panel comprises a second array substrate and a second opposing substrate arranged opposite to the second array substrate, wherein the second array substrate and the second opposing substrate are both flexible substrates; the initial liquid crystal display panel comprises a second array substrate, a second opposing substrate, a first glass substrate substrate and a second glass substrate substrate; wherein the second array substrate is located on a side of the first glass substrate substrate close to the second glass substrate substrate, and the second opposing substrate is located on a side of the second array substrate close to the second glass substrate substrate; peeling off the first glass substrate and the second glass substrate of the initial liquid crystal display panel; Laminating a side of the second opposing substrate away from the second array substrate to a side of the first array substrate away from the first opposing substrate; Providing a curved backlight module; The side of the second array substrate facing away from the second opposing substrate is attached to the backlight module along the bending direction of the backlight module; wherein the first liquid crystal display panel, the second liquid crystal display panel and the backlight module are bent in the same direction.

2. A method for preparing a curved liquid crystal display panel, characterized in that: include: A first liquid crystal display panel is provided; the first liquid crystal display panel comprises a first array substrate and a first opposing substrate arranged opposite to the first array substrate, wherein the first array substrate and the first opposing substrate are both glass substrates; An initial liquid crystal display panel of a second liquid crystal display panel is provided; the second liquid crystal display panel comprises a second array substrate and a second opposing substrate arranged opposite to the second array substrate, wherein the second array substrate and the second opposing substrate are both flexible substrates; the initial liquid crystal display panel comprises a second array substrate, a second opposing substrate, a first glass substrate substrate and a second glass substrate substrate; wherein the second array substrate is located on a side of the first glass substrate substrate close to the second glass substrate substrate, and the second opposing substrate is located on a side of the second array substrate close to the second glass substrate substrate; peeling off the second glass substrate of the initial liquid crystal display panel; Laminating a side of the second opposing substrate away from the second array substrate to a side of the first array substrate away from the first opposing substrate; peeling off the first glass substrate of the initial liquid crystal display panel; Providing a curved backlight module; The side of the second array substrate facing away from the second opposing substrate is attached to the backlight module along the bending direction of the backlight module; wherein the first liquid crystal display panel, the second liquid crystal display panel and the backlight module are bent in the same direction.

3. The method according to claim 1 or 2, characterized in that: Before laminating the side of the second opposing substrate away from the second array substrate with the side of the first array substrate away from the first opposing substrate, the method further includes: A diffusion layer is coated on a side of the second opposing substrate away from the second array substrate; the diffusion layer comprises a transparent substrate and diffusion particles dispersed in the transparent substrate; Laminating a side of the second opposing substrate away from the second array substrate to a side of the first array substrate away from the first opposing substrate, comprising: The side of the second opposing substrate facing away from the second array substrate is bonded to the side of the first array substrate facing away from the first opposing substrate through the diffusion layer.

4. The method according to claim 1 or 2, characterized in that: Before laminating the side of the second opposing substrate away from the second array substrate with the side of the first array substrate away from the first opposing substrate, the method further includes: A diffusion sheet is provided; the diffusion sheet comprises a diffusion layer, a first protective film and a second protective film, the first protective film is located on a first side of the diffusion layer, and the second protective film is located on a second side of the diffusion layer; the diffusion layer comprises a transparent substrate and diffusion particles dispersed in the transparent substrate; Peeling off the first protective film of the diffusion sheet; Laminating the first side of the diffusion layer to a side of the second opposing substrate away from the second array substrate; peeling off the second protective film of the diffusion sheet; Laminating a side of the second opposing substrate away from the second array substrate to a side of the first array substrate away from the first opposing substrate, comprising: The second side of the diffusion layer is bonded to a side of the first array substrate that is away from the first counter substrate.

5. The preparation method according to claim 1 or 2, characterized in that: After laminating the side of the second opposing substrate away from the second array substrate with the side of the first array substrate away from the first opposing substrate, the method further includes: Providing a curved glass cover; The side of the first opposing substrate facing away from the first array substrate is attached to the glass cover plate along the bending direction of the glass cover plate; the glass cover plate and the backlight module are bent in the same direction.

Images