Liquid crystal display module and liquid crystal display
By setting a concave and converging structure on the first edge of the FPC binding area of the lower TFT substrate of the liquid crystal display module, the stress concentration problem caused by the extrusion of the FPC is solved, and the display brightness uniformity and product life are improved.
Patent Information
- Application Number
- CN202421833010.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-31
AI Technical Summary
When the FPC is squeezed, existing LCD screens are prone to stress concentration, resulting in uneven display brightness and light leakage, which affects product yield and service life.
A liquid crystal display module is designed, and a concave retractable structure is provided on the first edge of the FPC binding area of the lower TFT substrate, so that the bent arch height after the FPC binding is greatly reduced, so as to avoid the FPC being squeezed.
It effectively avoids FPC being squeezed, prevents uneven display brightness and light leakage caused by stress concentration, improves product yield, saves costs, and extends product service life.
Smart Images
Figure CN222994782U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of liquid crystal display, and particularly to a liquid crystal display module and a liquid crystal display. Background Art
[0002] For display screens, especially in-vehicle display screens, the requirements for Mura (unequal display brightness, light leakage) are becoming increasingly strict. One of the important factors causing Mura is that the FPC (Flexible Printed Circuit) is squeezed, resulting in stress concentration. These stresses will be transmitted to the connected display screen through the FPC. The inside of the display screen is composed of multiple layers of materials, including a liquid crystal layer, a polarizer, a backlight module, etc. When the stress transmitted by the FPC acts on the display screen, it may cause small displacements or deformations between these material layers, thereby affecting the light transmittance and distribution uniformity. Especially when the connection points or areas between the FPC and the display screen are relatively weak, the stress transmission is more obvious, directly causing defective products to be scrapped.
[0003] Based on this, how to provide a liquid crystal display module that can avoid the FPC from being squeezed has become an urgent technical problem in the industry. Summary of the Invention
[0004] In order to solve at least one problem existing in the prior art, the purpose of this application is to provide a liquid crystal display module and a liquid crystal display, which can effectively avoid the FPC from being squeezed, prevent problems such as uneven display brightness and light leakage caused by stress concentration, help improve the product yield, save costs, and extend the product service life.
[0005] To achieve the above purpose, the liquid crystal display module provided by this application includes:
[0006] A liquid crystal panel, including a stacked structure formed by an upper polarizer, an upper TFT substrate, a lower TFT substrate, and a lower polarizer from top to bottom; wherein, the first edge of the lower TFT substrate protrudes outward relative to the corresponding edge of the upper TFT substrate for arranging the FPC bonding area; the first edge of the lower TFT substrate is further provided with a retracted structure that is concave inward relative to the main body of the first edge; the retracted structure is arranged at least corresponding to the FPC bonding area;
[0007] An FPC, including a panel connection end; the panel connection end is electrically connected to the lower TFT substrate in the FPC bonding area;
[0008] A backlight assembly, positioned below the liquid crystal panel for providing backlight.
[0009] Optionally, the recessed dimension range of the retracted structure concave inward relative to the main body of the first edge is 0.1 mm - 1 mm.
[0010] Further optionally, the protruding size range of the first edge body of the lower TFT substrate protruding outward relative to the corresponding edge of the upper TFT substrate is 1 mm - 4 mm.
[0011] Optionally, the base materials of the upper TFT substrate and the lower TFT substrate are transparent glass.
[0012] Optionally, the FPC is a multi-layer structure with an insulating layer on the surface and insulating layers and conductive layers cross-laminated inside.
[0013] Further optionally, the insulating layer is a PI layer or a PET layer.
[0014] Optionally, the conductive layer is a copper foil layer.
[0015] Optionally, a fully laminated transparent cover plate is further provided above the upper polarizer.
[0016] Optionally, a foam layer is further clamped between the edges of the liquid crystal panel and the backlight assembly; the foam layer is bonded to the backlight assembly, or the foam layer is bonded to the backlight assembly and the liquid crystal panel respectively.
[0017] To achieve the above object, the liquid crystal display provided by the present application further includes: the liquid crystal display module as described above.
[0018] In a liquid crystal display module and a liquid crystal display of the present application, by arranging a concave retracted structure on the first edge of the lower TFT substrate where the FPC bonding area is located, and this retracted structure corresponding to the FPC bonding area, the arch height formed after the FPC is bent and bonded is greatly reduced. Thus, it can effectively avoid the FPC from being squeezed, prevent problems such as uneven display brightness and light leakage caused by stress concentration, contribute to improving the product yield, saving costs, and extending the product service life.
[0019] Other features and advantages of the present application will be described in the subsequent description, and, in part, will be obvious from the description, or will be understood by implementing the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The drawings are used to provide a further understanding of the present application, and constitute a part of the description, and together with the embodiments of the present application, are used to explain the present application, and do not constitute a limitation to the present application. In the drawings:
[0021] Figure 1 is a partial structural schematic diagram of a liquid crystal display module according to an embodiment of the present application;
[0022] Figure 2 is Figure 1 a partial enlarged view of the liquid crystal display module at position A in
[0023] Figure 3 Cross-sectional view of the FPC folding area of the liquid crystal display module according to an embodiment of the present application;
[0024] Figure 4 Partial structural schematic diagram of a liquid crystal display module in the related art;
[0025] Figure 5 Cross-sectional view of the FPC folding area of the liquid crystal display module in the related art.
[0026] Among them, it specifically includes the following reference numerals:
[0027] Liquid crystal display module 100;
[0028] Liquid crystal panel 20; upper filter 21; upper TFT substrate 22; lower TFT substrate 23; lower filter 24; first edge 25; FPC bonding area 26; retracted structure 27;
[0029] FPC 30; panel connection end 31;
[0030] Backlight assembly 40;
[0031] Foam layer 50. Detailed implementation manners
[0032] Hereinafter, embodiments of the present application will be described in more detail with reference to the accompanying drawings. Although some embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present application. It should be understood that the drawings and embodiments of the present application are only for exemplary purposes and are not used to limit the protection scope of the present application.
[0033] The term "including" and its variations used herein are open-ended, that is, "including but not limited to". The term "based on" is "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.
[0034] Hereinafter, embodiments of the present application will be described in detail with reference to the drawings.
[0035] As Figures 1 - 3 shown, the liquid crystal display module 100 includes: a liquid crystal panel 20, an FPC 30, and a backlight assembly 40.
[0036] The liquid crystal panel 20 includes a stacked structure formed by a polarizer 21, an upper TFT substrate 22, a lower TFT substrate 23, and a lower polarizer 24 from top to bottom. Among them, the first edge 25 of the lower TFT substrate 23 protrudes outward relative to the corresponding edge of the upper TFT substrate 22 for arranging the FPC bonding area 26; the first edge 25 of the lower TFT substrate 23 is also provided with a retracted structure 27 that is concave inward relative to the main body of the first edge; the retracted structure 27 is arranged at least corresponding to the FPC bonding area 26.
[0037] It should be noted that the FPC bonding area in this application is the FPC bonding position. The "first edge" mentioned in this application is the edge of the lower TFT substrate 25 where the FPC bonding area 26 is arranged, used to distinguish from the edge of the lower TFT substrate 25 where the FPC bonding area 26 is not arranged. The "main body of the first edge" is the non-concave part of the first edge, used to distinguish from the retracted structure 27 of the first edge 25.
[0038] It can be understood that the substrates of the upper TFT substrate 22 and the lower TFT substrate 23 can be transparent glass or other transparent materials, and this application does not make specific restrictions on this.
[0039] The FPC 30 includes a panel connection end 31; the panel connection end 31 is electrically connected to the lower TFT substrate 23 in the FPC bonding area 26.
[0040] The backlight assembly 40 is positioned below the liquid crystal panel 20 to provide backlight for the display screen.
[0041] It should be noted that, in contrast, related technologies such as Figure 4 and Figure 5 show that the first edge 25 of the lower TFT substrate 23 where the FPC bonding area 26 is arranged is flush as a whole, the FPC bonding area 26 is outside, and the arch height formed by the bending of the FPC 30 after bonding is very large, which will be squeezed by the peripheral structural parts, generating stress, resulting in the Mura problem of the display screen. And the FPC 30 cannot be bent and flattened forcibly to reduce the arch height, otherwise greater stress will be generated.
[0042] For the liquid crystal display module 100 according to the embodiment of the present application, as Figures 1 - 3 shown, by arranging a concave retracted structure 27 on the first edge 25 of the lower TFT substrate 23 where the FPC bonding area 26 is arranged, and the retracted structure 27 corresponds to the FPC bonding area 26, the arch height formed by the bending of the FPC 30 after bonding is greatly reduced. Thus, it can effectively avoid the extrusion of the FPC, prevent problems such as uneven display brightness and light leakage caused by stress concentration, help improve the product yield, save costs, and extend the product service life.
[0043] In the embodiment of the present application, asFigure 3 As shown, the retracted structure 27 is concave relative to the first edge body, and the range of its recessed dimension L1 is preferably 0.1 mm - 1 mm, so as to balance improving the reliability of avoiding Mura problems, optimizing the structural layout and saving materials.
[0044] Furthermore, the first edge body of the lower TFT substrate 23 protrudes relative to the corresponding edge of the upper TFT substrate 22, and the range of its protruding dimension L2 is preferably 1 mm - 4 mm, so as to balance further improving the reliability of avoiding Mura problems, optimizing the structural layout and saving materials.
[0045] In the embodiment of the present application, the FPC 30 is a multi-layer structure with an insulating layer on the surface and insulating layers and conductive layers cross-stacked inside. Among them, the insulating layer can specifically be a PI (Polyimide) layer or a PET (Polyethyleneterephthalate) layer; the conductive layer can specifically be a copper foil layer.
[0046] Optionally, a fully laminated transparent cover plate is further provided above the upper polarizer 21, which helps to further improve the protection effect and extend the service life of the product.
[0047] In the embodiment of the present application, a foam layer 50 can also be clamped between the edges of the liquid crystal panel 20 and the backlight assembly 40, which plays a role of buffering, protecting and sealing, and is beneficial to further extending the service life of the product. In one example, the foam layer 50 is bonded to the backlight assembly 40. In another example, the foam layer 50 is bonded to the backlight assembly 40 and the liquid crystal panel 20 respectively.
[0048] The embodiment of the present application also provides a liquid crystal display, which includes the liquid crystal display module in the above embodiment.
[0049] In the description of the present application, it should be noted that the relationship between structures should be understood in a broad sense. For example, the orientation or positional relationship indicated by "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.
[0050] And, unless otherwise clearly specified and limited, the term "connection" can be a mechanical connection or an electrical connection; it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate medium, and can also be the communication inside two elements.
[0051] It should be noted that in the drawings, for clarity, the dimensions of layers, regions, components, and their relative dimensions may be exaggerated. Throughout the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions.
[0052] Those of ordinary skill in the art can understand that the above are only the preferred embodiments of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A liquid crystal display module, characterized in that: include: A liquid crystal panel, comprising a stacked structure formed from top to bottom by an upper polarizer, an upper TFT substrate, a lower TFT substrate and a lower polarizer; wherein the first edge of the lower TFT substrate is convexly arranged relative to the corresponding edge of the upper TFT substrate, so as to arrange an FPC binding area; the first edge of the lower TFT substrate is also provided with an inwardly concave structure relative to the main body of the first edge; the inwardly concave structure is arranged at least corresponding to the FPC binding area; The FPC comprises a panel connection terminal; the panel connection terminal is electrically connected to the lower TFT substrate in the FPC binding area; The backlight assembly is positioned below the liquid crystal panel and is used to provide backlight.
2. The liquid crystal display module according to claim 1, characterized in that: The indentation size of the retracted structure relative to the first edge body is in the range of 0.1 mm to 1 mm.
3. The liquid crystal display module according to claim 2, characterized in that: The first edge body of the lower TFT substrate protrudes outward relative to the corresponding edge of the upper TFT substrate by a size ranging from 1 mm to 4 mm.
4. The liquid crystal display module according to claim 1, characterized in that: The base materials of the upper TFT substrate and the lower TFT substrate are transparent glass.
5. The liquid crystal display module according to claim 1, characterized in that: The FPC is a multi-layer structure with an insulating layer on the surface and an insulating layer and a conductive layer cross-stacked inside.
6. The liquid crystal display module according to claim 5, characterized in that: The insulating layer is a PI layer or a PET layer.
7. The liquid crystal display module according to claim 5, characterized in that: The conductive layer is a copper foil layer.
8. The liquid crystal display module according to claim 1, characterized in that: A fully laminated transparent cover is also provided above the upper polarizer.
9. The liquid crystal display module according to claim 1, characterized in that: A foam layer is further sandwiched between the edge of the liquid crystal panel and the backlight assembly; the foam layer is bonded to the backlight assembly, or the foam layer is bonded to the backlight assembly and the liquid crystal panel respectively.
10. A liquid crystal display, characterized in that: include: A liquid crystal display module as described in any one of claims 1 to 9.