Liquid crystal display panel and display module
By setting a conductive protective layer and connecting the ground terminal of the FPC electrode in the uncovered area of the liquid crystal display panel, the glass debris and static problems in the TFT-LCD production process are solved, and the device performance is improved and permanent failure is avoided.
Patent Information
- Application Number
- CN202421494893.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-06-27
AI Technical Summary
During the production process of TFT-LCD, glass debris and static problems during the cutting process lead to damage to the trace area, affecting device performance, and there is a risk of high concealment and high random failure.
A liquid crystal display panel is designed to provide a conductive protective layer in the area not covered by the upper functional board to cover the driving signal line and gate trace to prevent the influence of glass debris, and to guide static electricity through the ground terminal of the FPC electrode to reduce static electricity loss.
Effectively prevent the impact of glass debris on wiring during cutting, reduce static losses, improve device performance and parameter indicators, and avoid permanent failures such as chip dielectric breakdown and burning.
Smart Images
Figure CN222704851U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of liquid crystal display technology, and in particular to a liquid crystal display panel and a display module. Background Art
[0002] TFT-LCD (Film Transistor-Liquid Crystal Display) is widely used in terminal displays such as mobile phones, industry, and vehicles. With the development of products, users have higher and higher requirements for the performance of TFT-LCD.
[0003] During mass production, a large-area lower functional board with TFT and wiring is prepared and then cut. However, on the one hand, glass fragments are generated during the cutting process and fall on the wiring of the lower functional board; on the other hand, static electricity is easily generated in the wiring area, affecting the performance or parameter indicators of the device. In severe cases, it will cause permanent failures such as chip dielectric breakdown and burning at one time, and this failure phenomenon is highly hidden and random.
[0004] Based on this, how to provide a liquid crystal display panel that can take into account both surface protection and electrostatic protection of wiring has become an urgent problem to be solved in the industry. Summary of the invention
[0005] In order to solve at least one problem existing in the prior art, the purpose of the present application is to provide a liquid crystal display panel and a display module, which not only form a surface protection for the wiring to prevent the influence of glass fragments during the cutting process, but also can effectively reduce electrostatic loss, help to improve the performance and parameter indicators of the device, and thus avoid permanent failures such as chip dielectric breakdown and burning.
[0006] To achieve the above-mentioned purpose, the liquid crystal display panel provided by the present application includes, from bottom to top, a lower functional plate, a liquid crystal layer and an upper functional plate; wherein the lower functional plate includes a first area covered by the upper functional plate, and a second area not covered by the upper functional plate;
[0007] The lower function board is provided with:
[0008] TFT, located in the first region and used as a pixel display switch;
[0009] A driver IC, located in the second area, for driving the display;
[0010] A driving signal line, connecting the source electrode of the TFT and the driving terminal of the driving IC, for transmitting a driving signal;
[0011] A gate wiring, connecting the gate of the TFT and the control terminal of the driver IC, for transmitting a switch control signal;
[0012] An FPC electrode is located in the second area, connected to the driver IC, and used for FPC connection;
[0013] The conductive protective layer comprises a covering portion and a connecting portion; wherein the covering portion at least covers the driving signal line and the gate wiring located in the second area; and the connecting portion is connected to the FPC ground terminal in the FPC electrode.
[0014] Preferably, the FPC ground terminal is located at the end of the FPC electrode.
[0015] Further preferably, the FPC electrode includes two FPC grounding terminals; the two FPC grounding terminals are respectively located at two ends of the FPC electrode;
[0016] The conductive protection layer includes two connecting parts, and the two connecting parts are connected to the two FPC grounding terminals in a one-to-one correspondence.
[0017] Preferably, the conductive protection layer is a transparent conductive oxide TCO pattern layer.
[0018] Preferably, the conductive protection layer is an indium tin oxide ITO pattern layer.
[0019] Further preferably, the thickness of the ITO pattern layer is in the range of 50 nm to 100 nm.
[0020] Preferably, the ITO pattern layer is an ITO layer prepared by magnetron sputtering.
[0021] Preferably, the corresponding area of the second area includes the gate wiring, the first insulating layer, the driving signal line, the second insulating layer and the conductive protection layer which are formed in sequence.
[0022] Further preferably, the first insulating layer and the second insulating layer are silicon nitride layers prepared by chemical vapor deposition.
[0023] To achieve the above-mentioned purpose, the present application also provides a liquid crystal display module, including: a backlight assembly and the liquid crystal display panel as described above.
[0024] A liquid crystal display panel and a display module of the present application are provided by arranging a driving IC and an FPC electrode in a second area not covered by the upper functional board; and respectively connecting the TFT and the driving IC through a driving signal line and a gate line; and by arranging a conductive protective layer, on the one hand, part of the driving signal line and part of the gate line are located in the second area, that is, not covered by the upper functional board, and are covered by the covering part of the conductive protective layer, so that surface protection is formed for the lines to prevent the influence of glass debris in the cutting process; on the other hand, the FPC grounding terminal in the FPC electrode is connected through the connecting part of the conductive protective layer, so that static electricity can be conducted away, effectively reducing static electricity loss, helping to improve the performance and parameter indicators of the device, and thus avoiding permanent failures such as chip dielectric breakdown and burning.
[0025] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings:
[0027] Figure 1 is a schematic structural diagram of a liquid crystal display panel according to an embodiment of the present application;
[0028] Figure 2 for Figure 1 A partial enlarged view of the middle A;
[0029] Figure 3 for Figure 1 Middle B-B' section.
[0030] Specifically, the following reference numerals are included:
[0031] 100-liquid crystal display panel; 20-lower functional board; 22-driving IC; 23-driving signal line; 24-gate wiring; 25-FPC electrode; 251-ground terminal; 26-conductive protective layer; 261-covering part; 262-connecting part; 27-first insulating layer; 28-second insulating layer; 30-upper functional board. DETAILED DESCRIPTION
[0032] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present application. It should be understood that the drawings and embodiments of the present application are only for exemplary purposes and are not intended to limit the scope of protection of the present application.
[0033] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part 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 accompanying drawings.
[0035] like Figure 1-Figure 3 As shown, the liquid crystal display panel 100 includes, from bottom to top, a lower functional plate 20, a liquid crystal layer (not shown in the figure), and an upper functional plate 30. The lower functional plate 20 includes a first area covered by the upper functional plate 30, and a second area not covered by the upper functional plate 30.
[0036] The lower functional board 20 is provided with: TFT (not shown in the figure), a driving IC 22 (Integrated Circuit), a driving signal line 23, a gate wiring 24, an FPC (Flexible Printed Circuit) electrode 25 and a conductive protective layer 26.
[0037] Among them, TFT is located in the first area and is used as a pixel display switch. Driver IC 22 is located in the second area and is used to drive the display. Drive signal line 23 connects the source of TFT and the drive end of driver IC 22 for transmitting drive signal. Gate wiring 24 connects the gate of TFT and the control end of driver IC 22 for transmitting switch control signal. FPC electrode 25 is located in the second area and is connected to driver IC 22 for FPC connection. Conductive protective layer 26 includes covering part 261 and connecting part 262; wherein, covering part 261 at least covers drive signal line 23 and gate wiring 24 located in the second area; connecting part 262 is connected to FPC grounding terminal 251 in FPC electrode 25.
[0038] In the specific example, the main bodies of the upper functional plate 30 and the lower functional plate 20 are glass substrates. It can be understood that transparent substrates of other materials can also be used, and the present application does not impose specific restrictions on this.
[0039] In a specific example, a pixel unit is disposed on the lower surface of the upper functional board 30 ; an upper polarizer is also disposed above the upper functional board 30 ; and a lower polarizer is also disposed below the lower functional board 20 .
[0040] The liquid crystal display panel 100 provided in the present application is provided with a conductive protective layer 26. On the one hand, part of the driving signal lines and part of the gate wiring are located in the second area, that is, they are not covered by the upper functional board 30, but are covered by the covering part 261 of the conductive protective layer 26, so as to form a surface protection for the wiring to prevent the influence of glass debris in the cutting process; on the other hand, the FPC grounding terminal 251 in the FPC electrode 25 is connected through the connecting part 262 of the conductive protective layer 26, so that static electricity can be conducted away, effectively reducing static electricity loss, helping to improve the performance and parameter indicators of the device, and thus avoiding permanent failures such as chip dielectric breakdown and burning.
[0041] In the embodiment of the present application, the FPC grounding terminal 251 is located at the end of the FPC electrode 25. Further preferably, the FPC electrode 25 includes two FPC grounding terminals 251, and the two FPC grounding terminals 251 are respectively located at the two ends of the FPC electrode 25; the conductive protective layer 26 includes two connecting parts 262, and the two connecting parts 262 are connected to the two FPC grounding terminals 251 in a one-to-one correspondence to improve the reliability of static elimination.
[0042] In the embodiment of the present application, the conductive protection layer 26 is a transparent conductive oxide TCO pattern layer.
[0043] Preferably, the conductive protective layer 26 is an indium tin oxide ITO pattern layer. Further preferably, the thickness of the ITO pattern layer ranges from 50nm to 100nm, so as to take into account the surface protection function, electrostatic protection function, material cost and space layout. In a specific example, the ITO pattern layer is preferably prepared by magnetron sputtering to ensure the quality of the film layer.
[0044] It is understandable that the conductive protective layer 26 in the present application may be TCO, specifically ITO, or other types of TCO, such as AZO (zinc aluminum oxide), etc.; or a non-transparent conductive film layer. The present application does not impose any specific restrictions on this.
[0045] In the present application embodiment, Figure 3 As shown, in the corresponding area of the second region, the gate wiring 24, the first insulating layer 27, the driving signal line 23, the second insulating layer 28 and the conductive protection layer 26 are formed in sequence. The gate wiring 24, the driving signal line 23 and the conductive protection layer 26 are insulated from each other by the first insulating layer 27 and the second insulating layer 28. In a specific example, the first insulating layer 27 and the second insulating layer 28 are preferably silicon nitride layers prepared by chemical vapor deposition.
[0046] In summary, according to the liquid crystal display panel 100 of the embodiment of the present application, by setting the driver IC 22 and the FPC electrode 25 in the second area not covered by the upper functional board 30; and connecting the TFT and the driver IC 22 respectively through the drive signal line 23 and the gate wiring 24; and by setting the conductive protective layer 26, on the one hand, part of the drive signal line 23 and part of the gate wiring 24 are located in the second area, that is, not covered by the upper functional board 30, and are covered by the covering part 261 of the conductive protective layer 26, so as to form a surface protection for the wiring to prevent the influence of glass fragments during the cutting process; on the other hand, by connecting the FPC grounding terminal 251 in the FPC electrode 25 through the connecting part 262 of the conductive protective layer 26, static electricity can be conducted away, effectively reducing static electricity loss, which is helpful to improve the performance and parameter indicators of the device, thereby avoiding permanent failures such as chip dielectric breakdown and burning.
[0047] The present application also provides a liquid crystal display module, which includes a backlight assembly and the liquid crystal display panel in the above embodiment.
[0048] It should be noted that the concepts such as “first” and “second” mentioned in this application are only used to distinguish different regions or structures, and are not used to limit the order, interdependence or relative importance of the functions performed by these regions or structures.
[0049] It should be noted that the modifications of "one" and "plurality" mentioned in this application are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more"; "plurality" should be understood as two or more.
[0050] It should be noted that the relationship between structures should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. It should be noted that the orientation or position relationship indicated by the terms "upper", "lower", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present application.
[0051] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" can refer to mechanical connection or electrical connection; can refer to direct connection or indirect connection through an intermediate medium, or can refer to internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0052] It should be noted that in the drawings, the sizes of layers, regions, components and their relative sizes may be exaggerated for clarity. The same or similar reference numerals throughout represent the same or similar components or components with the same or similar functions.
[0053] Those skilled in the art can understand that the above are only preferred embodiments of the present application and are not intended to limit the present application. Although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, 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 panel, characterized in that: It includes a lower functional plate, a liquid crystal layer and an upper functional plate from bottom to top; wherein the lower functional plate includes a first area covered by the upper functional plate and a second area not covered by the upper functional plate; The lower function board is provided with: TFT, located in the first region and used as a pixel display switch; A driver IC, located in the second area, for driving the display; A driving signal line, connecting the source electrode of the TFT and the driving terminal of the driving IC, for transmitting a driving signal; A gate wiring, connecting the gate of the TFT and the control terminal of the driver IC, for transmitting a switch control signal; An FPC electrode is located in the second area, connected to the driver IC, and used for FPC connection; The conductive protection layer comprises a covering portion and a connecting portion; wherein the covering portion at least covers the driving signal line and the gate wiring located in the second area; and the connecting portion is connected to the FPC ground terminal in the FPC electrode.
2. The liquid crystal display panel according to claim 1, characterized in that: The FPC ground terminal is located at the end of the FPC electrode.
3. The liquid crystal display panel according to claim 2, characterized in that: The FPC electrode includes two FPC grounding terminals; the two FPC grounding terminals are respectively located at two ends of the FPC electrode; The conductive protection layer includes two connecting parts, and the two connecting parts are connected to the two FPC grounding terminals in a one-to-one correspondence.
4. The liquid crystal display panel according to claim 1, characterized in that: The conductive protection layer is a transparent conductive oxide TCO pattern layer.
5. The liquid crystal display panel according to claim 1, characterized in that: The conductive protection layer is an indium tin oxide ITO pattern layer.
6. The liquid crystal display panel according to claim 5, characterized in that: The thickness of the ITO pattern layer is in the range of 50nm-100nm.
7. The liquid crystal display panel according to claim 5, characterized in that: The ITO pattern layer is an ITO layer prepared by magnetron sputtering.
8. The liquid crystal display panel according to any one of claims 1 to 7, characterized in that: In the corresponding area of the second area, the gate wiring, the first insulating layer, the driving signal line, the second insulating layer and the conductive protection layer are formed in sequence.
9. The liquid crystal display panel according to claim 8, characterized in that: The first insulating layer and the second insulating layer are silicon nitride layers prepared by chemical vapor deposition.
10. A liquid crystal display module, characterized in that: include: A backlight assembly and a liquid crystal display panel as claimed in any one of claims 1 to 9.