Display module and display device

Abstract

The application discloses a display module and a display device, and relates to the technical field of display modules.The display module comprises a mesh transmission structure located in a display area of the display module, a frame transmission line located in a frame area of the display module and electrically connected with the mesh transmission structure, a first connecting line and a second connecting line, the first connecting line is located in an edge area of a binding area of the display module and extends to the frame area to be electrically connected with the frame transmission line, the second connecting line is located in a middle area of the binding area of the display module, a plurality of power supply voltage terminals are located in the binding area and comprise a first terminal and a second terminal for inputting a first power supply voltage, the first terminal is located in the edge area of the binding area, and the second terminal is located in the middle area of the binding area, the first terminal is electrically connected with the frame transmission line through the first connecting line, and the second terminal is electrically connected with the mesh transmission structure through the second connecting line.The technical scheme provided by the application realizes a narrow frame of the display module and meets the brightness requirement of a high-brightness mode of the display module.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and more particularly to a display module and a display device. Background Technology

[0002] With the continuous development of display technology, display modules have been increasingly used in narrow-bezel display products. However, this can lead to some problems due to limited design space. For example, in High Brightness Mode (HBM), the current density of the traces in the bezel area is too high, which can cause the temperature to rise too high and result in screen burn-in or display abnormalities. This limits the brightness of the display module in High Brightness Mode. Summary of the Invention

[0003] This invention provides a display module and a display device to achieve a narrow bezel while meeting the brightness requirements of the display module's high-brightness mode.

[0004] According to one aspect of the present invention, a display module is provided, including a display area and a non-display area; the non-display area includes a border area surrounding the display area and a binding area located on one side of the display area, the binding area being connected to the display area through the border area; the display module further includes:

[0005] A mesh transmission structure is located in the display area of ​​the display module;

[0006] A border transmission line is located in the border area of ​​the display module; the border transmission line is electrically connected to the mesh transmission structure.

[0007] A first connecting line and a second connecting line, wherein the first connecting line is located at the edge of the bonding area of ​​the display module and extends to the border area to be electrically connected to the border transmission line; the second connecting line is located in the middle area of ​​the bonding area of ​​the display module.

[0008] Multiple power supply voltage terminals are located in the bonding area; among the multiple power supply voltage terminals, the power supply voltage terminal for inputting a first power supply voltage includes a first terminal and a second terminal, wherein the first terminal is located in the edge area of ​​the bonding area, and the second terminal is located in the middle area of ​​the bonding area; the first terminal is electrically connected to the frame transmission line through the first connecting line; the second terminal is electrically connected to the mesh transmission structure through the second connecting line.

[0009] Optionally, the display module further includes:

[0010] Substrate;

[0011] A light-emitting device layer is located on one side of the substrate and in the display area; the mesh transmission structure is electrically connected to the light-emitting device layer and is used to provide a first reference voltage to the light-emitting devices in the light-emitting device layer;

[0012] Preferably, among the plurality of power supply voltage terminals, the power supply voltage terminals used for inputting the first power supply voltage include only the first terminal and the second terminal;

[0013] Preferably, the first power supply voltage is the cathode voltage of the light-emitting device.

[0014] Optionally, the mesh transmission structure includes:

[0015] Multiple first transmission lines extending along a first direction and arranged sequentially along a second direction;

[0016] Multiple second transmission lines extending along a second direction and arranged sequentially along a first direction;

[0017] Wherein, the first direction and the second direction are intersecting; the first transmission line and the second transmission line are electrically connected at the intersection of the first transmission line and the second transmission line; each of the first transmission lines is electrically connected to the frame transmission line;

[0018] Preferably, the first direction and the second direction are perpendicular to each other;

[0019] Preferably, the second connecting line extends from the second terminal along the second direction of the display area;

[0020] Preferably, the second terminal is located on the central axis of the bonding area in the second direction, or is located on one side of the central axis of the bonding area in the second direction and is adjacent to the central axis.

[0021] Optionally, the display module further includes:

[0022] The driver chip is bonded to the bonding area and is located between the second terminal and the display area;

[0023] The second connecting line extends from the second terminal along the second direction through the area where the driver chip is located toward the display area;

[0024] A first insulating layer is provided between the driver chip and the second connection line;

[0025] Preferably, the material of the first insulating layer has thermal insulation properties.

[0026] Optionally, the display module further includes:

[0027] The driver chip is bonded to the bonding area and is located between the second terminal and the display area;

[0028] The second connection line includes a first connection segment and a second connection segment. The first connection segment extends from the second terminal along the second direction to the driver chip and is electrically connected to a spare input terminal on the driver chip. The second connection segment is electrically connected to a spare output terminal on the driver chip and extends from the driver chip toward the display area.

[0029] Optionally, the display bezel area further includes: a signal gathering connection portion, which is used to electrically connect the second connection line and the mesh transmission structure;

[0030] The signal gathering connection is electrically connected to at least one second transmission line located in the middle area of ​​the display area;

[0031] Preferably, there are multiple second connecting lines, and one end of each second connecting line near the display area is electrically connected to the signal gathering connection part.

[0032] Optionally, there are two border transmission lines, namely a first border transmission line and a second border transmission line; the first border transmission line and the second border transmission line are located on opposite sides of the display area; one end of each first transmission line is electrically connected to the first border transmission line and the other end is electrically connected to the second border transmission line.

[0033] The number of the first connecting lines is two, located in the first edge area and the second edge area of ​​the binding area respectively. The binding area includes a middle area and a first edge area and a second edge area located on opposite sides of the middle area. The first edge area, the middle area and the second edge area are arranged sequentially along the first direction. The first connecting line located in the first edge area is electrically connected to the first frame transmission line, and the second connecting line located in the second edge area is electrically connected to the second frame transmission line.

[0034] Preferably, the display area includes a first side and a second side disposed opposite to each other, and a third side connecting the first side and the second side; the binding area is located on one side of the third side of the display area; at least a portion of the first frame transmission line extends along the first side, and at least a portion of the second frame transmission line extends along the second side.

[0035] Preferably, the third side is connected to the first side by an arc-shaped edge; the first frame transmission line includes a first straight transmission segment extending along the first side, a second straight transmission segment extending along the third side, and a first arc-shaped transmission segment connecting the first straight transmission segment and the second straight transmission segment; a first connecting line electrically connected to the first frame transmission line extends from a first terminal located in the first edge area along the second direction to the second straight transmission segment, and is electrically connected to the second straight transmission segment;

[0036] Preferably, the third side and the second side are connected by an arc-shaped edge; the second frame transmission line includes a third straight transmission segment extending along the second side, a fourth straight transmission segment extending along the third side, and a second arc-shaped transmission segment connecting the third straight transmission segment and the fourth straight transmission segment; a first connecting line electrically connected to the second frame transmission line extends from a first terminal located in the second edge area along the second direction to the fourth straight transmission segment, and is electrically connected to the fourth straight transmission segment.

[0037] Optionally, the display module further includes multiple metal layers located on the same side of the substrate, and a second insulating layer is disposed between adjacent metal layers;

[0038] The frame transmission line is located in at least one metal layer; the first connection line is located in at least one metal layer; the second connection line is located in at least one metal layer;

[0039] Preferably, the first transmission line and the second transmission line are located in different metal layers, and the first transmission line and the second transmission line are electrically connected at the intersection through a through-hole penetrating the second insulating layer;

[0040] Preferably, the second connecting line is composed of multiple layers of metal traces.

[0041] Optionally, the border area further includes: a border connecting line located between the border transmission line and the display area; the metal layer on which the border connecting line is located is different from the metal layer on which the border transmission line is located.

[0042] Wherein, the vertical projection of the border connecting line on the substrate partially overlaps with the vertical projection of the border transmission line on the substrate, and they overlap in the overlapping area; the first transmission line located in the display area is electrically connected to the border transmission line through the border connecting line;

[0043] Preferably, the frame connecting line is disposed on the same layer as the anode in the light-emitting device layer.

[0044] According to another aspect of the present invention, a display device is provided, comprising the display module described in any embodiment of the present invention.

[0045] The technical solution provided by this invention adjusts the layout of the power supply voltage traces and the position of some of the first power supply voltage input terminals. Specifically, it moves some of the first power supply voltage input terminals (second terminals) to the middle area of ​​the bonding area and sets the extension method of the connecting line (second connecting line) electrically connected to the second terminal to extend from the second terminal through the middle area of ​​the bonding area to the display area. This reduces the length of the second connecting line and lowers its resistance, thereby increasing the current on the second connecting line and effectively sharing the screen current. This, in turn, reduces the current input from the first connecting line, i.e., reduces the current at the bottleneck position. Therefore, it can achieve a narrow bezel for the display module while meeting the brightness requirements of the high-brightness mode of the display module.

[0046] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the distribution of power supply voltage transmission lines in a display module provided in related technologies;

[0049] Figure 2 yes Figure 1 An enlarged schematic diagram of region N1 in the structure shown;

[0050] Figure 3 This is a schematic diagram of the distribution of power supply voltage transmission lines in a display module provided by an embodiment of the present invention;

[0051] Figure 4 yes Figure 3 An enlarged schematic diagram of region N2 in the structure shown;

[0052] Figure 5 This is a schematic diagram of the structure of a display module provided in an embodiment of the present invention;

[0053] Figure 6 yes Figure 5 The diagram shows a cross-sectional view of the structure along AA1.

[0054] Figure 7 This is a partial distribution diagram of the power supply voltage transmission line in another display module provided by an embodiment of the present invention;

[0055] Figure 8 yes Figure 7 The diagram shows a cross-sectional view of the structure along BB1.

[0056] Figure 9 This is a schematic diagram of the distribution of power supply voltage transmission lines in a display module provided by an embodiment of the present invention;

[0057] Figure 10 yes Figure 9 An enlarged schematic diagram of region N3 in the structure shown;

[0058] Figure 11 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0059] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0060] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0061] AMOLED (Active-matrix organic light-emitting diode) boasts advantages such as self-illumination, wide color gamut, high contrast, flexibility, and high response time, offering broad application prospects. The development of narrow bezel technology for AMOLED display modules is a significant trend in the display industry. Its core lies in overcoming the physical limitations of traditional designs through technological innovation, thereby improving screen-to-body ratio and user experience. Furthermore, current end-products demand high brightness (HBM) from flexible AMOLED panels, and there is also a need to improve the brightness of HBM. However, increasing the brightness of display modules under HBM requires increasing the current in the screen. But for narrow bezel display modules, the limited design space can easily lead to excessive current density in the wiring within the bezel area during high-brightness mode, resulting in screen burn-in or display abnormalities. The specific reasons are as follows:

[0062] To achieve the ultimate narrowness of the bottom bezel of the display module, the industry currently widely adopts the FIAA (Fanout in AA) technology solution. Figure 1 This is a schematic diagram of the power supply voltage transmission line distribution in a display module provided in related technologies. Figure 2 yes Figure 1 An enlarged schematic diagram of region N1 in the structure shown, for reference. Figure 1 and Figure 2 This technology optimizes circuit layout and wiring design, relocating the fanout signal traces originally located on the bottom bezel to the interior of the screen display area AA, thereby saving bezel space and significantly reducing the width of the bottom bezel. Simultaneously, to improve in-plane uniformity, the non-data signal traces (DATA FIAA) in the display area AA are distributed into a mesh structure 1, transmitting the cathode voltage ELVSS. Because the connecting line b of mesh structure 1 is relatively long, the current under HBM preferentially propagates along path ①, with only a small amount of current propagating along path ②. As shown in the figure, at position a, before the anode and cathode connect, with the extremely narrow bottom bezel, this becomes the location with the highest current density (or the most severe heat generation), becoming a bottleneck for higher HBM brightness. Related technologies increase the width of the ELVSS transmission line at position a to maximize HBM brightness, or improve the luminous efficiency of organic light-emitting materials to enhance HBM brightness. However, due to the requirement of narrow bezels, achieving higher HBM brightness is difficult, and the development cycle of organic light-emitting material systems is long, making it difficult to quickly match mass production project development.

[0063] Therefore, how to achieve a narrow bezel for the display module while meeting the brightness requirements of the high-brightness mode has become a technical problem that urgently needs to be solved in this field.

[0064] Therefore, embodiments of the present invention provide a display module. Figure 3This is a schematic diagram of the power supply voltage transmission line distribution in a display module according to an embodiment of the present invention. Figure 4 yes Figure 3 An enlarged schematic diagram of region N2 in the structure shown, for reference. Figure 3 and Figure 4 ,refer to Figure 3 and Figure 4 The display module includes a display area AA and a non-display area NAA; the non-display area NAA includes a border area Q1 surrounding the display area AA and a binding area Q2 located on one side of the display area AA, the binding area Q2 being connected to the display area AA through the border area Q1; the display module also includes:

[0065] The mesh transmission structure 20 is located in the display area AA of the display module;

[0066] The frame transmission line 10 is located in the frame area Q1 of the display module; the frame transmission line 10 is electrically connected to the mesh transmission structure 20.

[0067] The first connecting line L1 and the second connecting line L2 are located at the edge of the bonding area Q2 of the display module and extend to the border area Q1 to be electrically connected to the border transmission line 10; the second connecting line L2 is located in the middle area of ​​the bonding area Q2 of the display module.

[0068] Multiple power supply voltage terminals are located in the bonding area Q2. Among the multiple power supply voltage terminals, the power supply voltage terminal used for inputting the first power supply voltage includes a first terminal and a second terminal. The first terminal is located in the edge region of the bonding area Q2, and a first connecting line L1 is located in the edge region of the bonding area Q2. The first connecting line L1 extends from the first terminal through the edge region of the bonding area Q2 towards the frame area Q1 and is electrically connected to the frame transmission line 10 located in the frame area Q1. That is, the first terminal is electrically connected to the frame transmission line 10 through the first connecting line L1. The frame transmission line 10 is arranged along the side of the non-bonded area of ​​the display area AA and is electrically connected to the mesh transmission structure 20 located in the display area AA from the non-bonded area side of the display area AA. The second terminal is located in the middle region of the bonding area Q2, and a second connecting line L2 extends from the second terminal through the middle region of the bonding area Q2 towards the display area AA and is electrically connected to the mesh transmission structure 20 located in the display area AA. That is, the second terminal is electrically connected to the mesh transmission structure 20 from the bonding area side of the display area AA through the second connecting line L2. The second connecting line L2 can be directly electrically connected to the mesh transmission structure 20, or it can be electrically connected to the mesh transmission structure 20 through the signal aggregation connecting part L20.

[0069] The technical solution provided in this embodiment of the invention adjusts the layout position of the second connecting line L2, which is electrically connected to the mesh structure from the non-bonding area side of the display area AA, and the position of the second terminal that inputs the first power supply voltage to the second connecting line L2. Specifically, the second terminal is moved to the middle area of ​​the bonding area Q2, and the extension method of the second connecting line L2, which is electrically connected to the second terminal, is set to extend from the second terminal through the middle area of ​​the bonding area Q2 to the display area AA. Compared with related technologies, the length of the second connecting line L2 can be reduced, the resistance of the second connecting line L2 can be reduced, thereby increasing the current on the second connecting line L2, effectively sharing the screen current, and thus reducing the current input from the first connecting line L1, i.e., reducing the bottleneck position (such as...). Figure 2 The current at position a) in the display module is reduced, thus achieving a narrow bezel for the display module while meeting the brightness requirements in the high-brightness mode.

[0070] The above are the core inventive points of this invention. The structure of the display module will be described in detail below with reference to the accompanying drawings.

[0071] Figure 5 This is a schematic diagram of the structure of a display module provided in an embodiment of the present invention, for reference. Figure 5 The display module includes a substrate and at least one active layer and multiple metal layers stacked on one side of the substrate. The substrate provides protection and support for the display module. The substrate can be a flexible substrate made of materials such as polyimide (PI), polyethylene naphthalate (PEN), or polyethylene terephthalate (PET), or a rigid substrate made of materials such as glass. At least one active layer and multiple metal layers are disposed on one side of the substrate, and the multiple metal layers are isolated from each other by insulating layers.

[0072] At least one active layer and multiple metal layers constitute a pixel circuit layer in the display area AA of the display module. The pixel circuit layer includes multiple pixel circuit units electrically connected to light-emitting devices, and the pixel circuit units are used to drive the light-emitting devices. At least one active layer and multiple metal layers constitute a border circuit in the border area Q1 of the display module, wherein the border circuit may include at least a light-emitting control circuit 200 and a scanning drive circuit 100.

[0073] Specifically, in the display area AA, the display module includes a pixel circuit layer located on one side of the substrate and a light-emitting device layer located on the side of the pixel circuit layer away from the substrate. The pixel circuit layer includes multiple pixel circuit units, multiple data lines (D1 to Dr), multiple scan signal lines (S1 to Sq), multiple light emission control signal lines (E1 to Eo), and multiple power lines. The circuit located in the non-display area NAA includes a scan drive circuit 100, a light emission control circuit 200, and a screen test circuit 3. Multiple scan signal lines (S1 to Sm) are electrically connected to the scan drive circuit 100, and multiple light emission control signal lines (E1 to Eq) are electrically connected to the light emission control circuit 200. Multiple data lines D (D1 to Dr) are electrically connected to the driver chip 2 of the display module. A pixel circuit unit and a light-emitting device connected to the pixel circuit unit constitute a sub-pixel. The display area AA can include multiple sub-pixels Pxij, where i and j can be natural numbers. The pixel circuit units are connected to the scan signal lines, light emission control signal lines, and data lines, respectively. The data line is configured to provide data voltage to the pixel circuit unit, the scan signal line is configured to provide scan signal to the pixel circuit unit, and the light emission control signal line is configured to provide light emission control signal to the pixel circuit unit, thereby realizing the light emission control of the light-emitting device. The pixel circuit unit can adopt a "7T1C" circuit, an "8T1C" circuit, or a "10T1C" circuit, and this embodiment of the invention does not limit this. The display area AA of the display module is used to display the image, and the border area Q1 of the display module is used to place the border circuit and signal traces.

[0074] In the display module, the bonding area Q2 is the area used to realize the electrical connection and physical fixation between the display module and external circuits (such as driver chip 2, motherboard). The bonding area Q2 of the display module is provided with multiple power supply voltage terminals for providing power supply voltage to the sub-pixels in the display area AA. In this embodiment of the invention, the power supply voltage terminals used to input the first power supply voltage include a first terminal and a second terminal. The first terminal is located in the edge area of ​​the bonding area Q2. The first terminal is electrically connected to the frame transmission line 10 through the first connecting line L1. The frame transmission line 10 is electrically connected to the mesh transmission structure 20 located in the display area AA. The mesh transmission structure 20 is electrically connected to the light-emitting device layer. Therefore, the first terminal can sequentially provide the first power supply voltage to the light-emitting device in the light-emitting device layer through the first connecting line L1, the frame transmission line 10, and the mesh transmission structure 20. The second terminal is located in the middle area of ​​the bonding area Q2. The second connecting line L2 is electrically connected to the second terminal. The second terminal sequentially provides the first power supply voltage to the light-emitting device in the light-emitting device layer through the second connecting line L2 and the mesh transmission structure 20. Optionally, among the multiple power supply voltage terminals, only the first terminal and the second terminal are used for inputting the first power supply voltage, thereby reducing the number of power supply voltage terminals used for inputting the first power supply voltage and reducing wiring difficulty. The first power supply voltage is the cathode voltage ELVSS; in other embodiments of the invention, the first power supply voltage may also be other voltages.

[0075] The technical solution provided by this invention adjusts the layout of the cathode voltage traces and the position of some cathode voltage terminals. Specifically, some cathode voltage terminals (second terminals) are moved to the middle area of ​​the bonding area Q2, and the extension method of the connecting line (second connecting line L2) electrically connected to the second terminal is set to extend from the second terminal through the middle area of ​​the bonding area Q2 to the display area AA. This reduces the length of the second connecting line L2 and lowers its resistance, thereby increasing the current on the second connecting line L2 and effectively sharing the screen current. This, in turn, reduces the current input from the first connecting line L1, i.e., reduces the current at the bottleneck position. Therefore, it is possible to achieve a narrow bezel for the display module while meeting the brightness requirements of the high-brightness mode of the display module.

[0076] Based on the above embodiments, optionally, refer to... Figure 3 The mesh transmission structure 20 includes:

[0077] Multiple first transmission lines 21 extending along the first direction X and arranged sequentially along the second direction Y;

[0078] Multiple second transmission lines 22 extending along the second direction Y and arranged sequentially along the first direction X;

[0079] The first direction X and the second direction Y are intersected; the first transmission line 21 and the second transmission line 22 are electrically connected at the intersection of the first transmission line 21 and the second transmission line 22; each of the first transmission lines 21 is electrically connected to the frame transmission line 10.

[0080] Specifically, in an OLED display module, the emission of light from each light-emitting device requires a voltage applied to both the cathode and anode. The cathode, as a common electrode, provides a path for electron injection to all light-emitting devices; it must cover the entire display area AA, and the edge of the cathode may even extend beyond the boundary of the display area AA. Figure 3 In this context, the boundary BJ is where the cathode extends beyond the boundary of the display area AA. In related technologies, a full-surface metal cathode is prone to voltage drop (IRDrop) due to excessive resistance, resulting in lower brightness at the edges compared to the center. By setting a mesh transmission structure 20, the cathode of the light-emitting device is electrically connected to the mesh transmission structure 20, which improves current dispersion and enhances the uniformity of brightness across the entire screen.

[0081] The mesh transmission structure 20 includes multiple first transmission lines 21 extending along a first direction X and arranged sequentially along a second direction Y, and multiple second transmission lines 22 extending along the second direction Y and arranged sequentially along the first direction X. Each first transmission line 21 is electrically connected to the frame transmission line 10, thereby enabling the input of the cathode voltage of each first transmission line 21. The first transmission line 21 and the second transmission line 22 are electrically connected at their intersection, thereby enabling the input of the cathode voltage of the second transmission line 22. The frame transmission line 10 is arranged along the side of the unbonded area Q2 of the display area AA, therefore the mesh transmission structure 20 has multiple first power supply voltage input points on the side of the unbonded area Q2 of the display area AA. To further improve the uniformity of current on the mesh transmission structure 20, this embodiment of the invention also provides a second terminal and a second connecting line L2 located in the middle region of the bonding area Q2. The second connecting line L2 extends from the second terminal through the middle region of the bonding area Q2 to the display area AA, so as to input a first power supply voltage to the mesh transmission structure 20 from the side where the bonding area Q2 of the display area AA is located. That is, the mesh transmission structure 20 has at least one first power supply voltage input point on the side where the bonding area Q2 of the display area AA is located.

[0082] Optionally, the scan signal lines in the display module extend along the first direction X, which is the horizontal direction of the arrayed sub-pixels. The second direction Y can be the column direction of the sub-pixels, and the first direction X and the second direction Y are perpendicular to each other. The second connecting line L2 is electrically connected to at least one second transmission line 22 located in the central region of the display area AA, and the second connecting line L2 is used to input a first power supply voltage from at least one second transmission line 22 located in the central region of the display area AA to the mesh transmission structure 20.

[0083] Furthermore, the second terminal is located on the central axis of the bonding area Q2 in the second direction Y, or on one side of the central axis of the bonding area Q2 in the second direction Y, and adjacent to the central axis. The second connecting line L2 extends from the second terminal along the second direction Y through the middle area of ​​the bonding area Q2 to the display area AA, thereby reducing the distance between the second transmission line 22 electrically connected to the second connecting line L2 and the central axis of the display area AA, so that the first power supply voltage input from the bonding area Q2 side of the display area AA can be uniformly transmitted from the second transmission line 22 located on or adjacent to the central axis of the display area AA to the light-emitting devices located on both sides of the central axis of the display area AA.

[0084] Based on the above embodiments, Figure 6 yes Figure 5 The diagram shows a cross-sectional view of the structure along AA1. (Refer to...) Figure 3 , Figure 4 and Figure 6 In one embodiment of the present invention, the display module further includes:

[0085] The driver chip 2 is bonded to the bonding area Q2 and is located between the second terminal and the display area AA;

[0086] The second connecting line L2 extends from the second terminal along the second direction Y through the area where the driver chip 2 is located toward the display area AA; wherein, a first insulating layer 03 is provided between the driver chip 2 and the second connecting line L2.

[0087] Specifically, the driver chip 2 is bonded to the bonding area Q2 and located between the second terminal and the display area AA; while the second connecting line L2 extends from the second terminal through the middle area of ​​the bonding area Q2 towards the display area AA to input the first power supply voltage from the side of the bonding area Q2 of the display area AA to the mesh transmission structure 20. Therefore, the second connecting line L2 needs to cross the area where the driver chip 2 is located during its extension. In this embodiment of the invention, a first insulating layer 03 is provided between the driver chip 2 and the second connecting line L2. The first insulating layer 03 electrically isolates the driver chip 2 and the second connecting line L2, preventing the electrical signals on the second connecting line L2 from interfering with each other. The second connecting line L2 can be disposed between the first insulating layer 03 and the substrate 01, and the driver chip 2 is disposed on the side of the first insulating layer 03 away from the substrate 01.

[0088] Furthermore, the material of the first insulating layer 03 has thermal insulation properties; that is, the material of the first insulating layer 03 has both insulating and thermal insulation properties. By setting the material of the first insulating layer 03 to have thermal insulation properties, the heat generated by the second connecting line L2 can be prevented from affecting the bonding of the driver chip 2, thereby improving the firmness of the bonding of the driver chip 2 to the bonding area Q2. Optionally, the material of the first insulating layer 03 may include at least one of polymethyl methacrylate, ceramic, and aerogel.

[0089] Based on the above embodiments, Figure 7 This is a partial distribution diagram of the power supply voltage transmission lines in another display module provided by an embodiment of the present invention. Figure 8 yes Figure 7 The diagram shows a cross-sectional view of the structure along BB1. (Refer to...) Figure 7 and Figure 8 In another embodiment of the present invention, the display module further includes:

[0090] The driver chip 2 is bonded to the bonding area Q2 and is located between the second terminal and the display area AA;

[0091] The second connection line L2 includes a first connection segment L201 and a second connection segment L202. The first connection segment L201 extends from the second terminal along the second direction Y to the driver chip 2 and is electrically connected to the spare input terminal on the driver chip 2. The second connection segment L202 is electrically connected to the spare output terminal on the driver chip 2 and extends from the driver chip 2 to the display area AA.

[0092] Specifically, the driver chip 2 may be provided with at least two spare terminals, including at least one spare input terminal and at least one spare output terminal. The spare input terminal and the spare output terminal are electrically connected through at least one of the metal layer and conductive holes in the driver chip 2. The second connecting line L2 is configured to include a first connecting segment L201 and a second connecting segment L202. The first connecting segment L201 is electrically connected to the second terminal on the bonding area Q2 and extends from the second terminal along the second direction Y to the driver chip 2, where it is electrically connected to the spare input terminal on the driver chip 2. The second connecting segment L202 is electrically connected to the spare output terminal on the driver chip 2 and extends from the driver chip 2 toward the display area AA to transmit the first power supply voltage to the mesh transmission structure 20 located in the display area AA. In this embodiment of the invention, the spare terminals in the driver chip 2 can be used to transmit the first power supply voltage without the need for a first insulating layer 03 between the driver chip 2 and the second connecting line L2, which is beneficial for the heat dissipation of the driver chip 2.

[0093] Based on the above embodiments, refer to Figure 4 and Figure 7The display module also includes a screen testing circuit 3, located between the display area AA and the driver chip 2. The second connecting line L2 needs to cross the area where the screen testing circuit 3 is located during its extension. An insulating layer can be provided between the screen testing circuit 3 and the second connecting line L2 to electrically isolate them and prevent the electrical signals on the second connecting line L2 from interfering with each other. Alternatively, the second connecting line L2 can be configured to pass through the gaps between the traces in the screen testing circuit 3, depending on the actual situation.

[0094] Based on the above embodiments, refer to Figure 3 , Figure 4 , Figure 7 , Figure 9 and Figure 10 Optionally, the border area Q1 further includes: a signal gathering connection part L20, which is electrically connected between the second connection line L2 and the mesh transmission structure 20; wherein the signal gathering connection part L20 is electrically connected to at least one second transmission line 22 located in the middle area of ​​the display area AA.

[0095] Specifically, a signal gathering connection portion L20 is further provided between the second connecting line L2 and the mesh transmission structure 20. The width of the signal gathering connection portion L20 in the first direction X is greater than the width of the second connecting line L2 in the first direction X, and the second connecting line L2 is electrically connected to the signal gathering connection portion L20. The signal gathering connection portion L20 is also electrically connected to at least one second transmission line 22 located in the middle area of ​​the display area AA. For example, Figure 3 , Figure 4 , Figure 7 , Figure 9 and Figure 10 An example is shown where the signal aggregation connection L20 is electrically connected to three second transmission lines 22 located in the middle area of ​​the display area AA, so as to synchronously provide a first power supply voltage to the three second transmission lines 22. The electrical connection of the signal aggregation connection L20 to multiple second transmission lines 22 located in the middle area of ​​the display area AA can further improve the current dispersion effect and enhance the brightness uniformity of the entire screen.

[0096] Based on the above embodiments, see Figure 9 and Figure 10 Optionally, there may be multiple second connecting lines L2, with one end of each L2 closest to the display area AA electrically connected to the signal collection connection part L20. Figure 9 and Figure 10 An example is shown where two second connection lines L2 are electrically connected to the signal aggregation connection L20.

[0097] Specifically, the number of second terminals can be equal to or less than the number of second connecting lines L2. When the number of second terminals equals the number of second connecting lines L2, each second terminal can be connected to a second connecting line L2 in a one-to-one correspondence. When the number of second terminals is less than the number of second connecting lines L2, at least one second terminal can be electrically connected to one or more second connecting lines L2. In this embodiment of the invention, by setting multiple parallel-connected second connecting lines L2, the screen current can be shared among multiple second connecting lines L2, thereby further reducing the current input from the first connecting line L1, i.e., reducing the current at the bottleneck position. Furthermore, setting multiple parallel-connected second connecting lines L2 can reduce the current input from the first connecting line L1 while also reducing the current on the second connecting lines L2, thus preventing excessive current on the second connecting lines L2 from causing overheating and affecting the bonding and normal operation of the driver chip 2.

[0098] Based on the above embodiments, optionally, the number of border transmission lines 10 is two, namely a first border transmission line 11 and a second border transmission line 12; the first border transmission line 11 and the second border transmission line 12 are located on opposite sides of the display area AA; the first end of each first transmission line 21 is electrically connected to the first border transmission line 11, and the second end of each first transmission line 21 is electrically connected to the second border transmission line 12.

[0099] Specifically, bezel transmission lines 10 are respectively arranged on both sides of the display area AA, so that the two ends of the first transmission line 21 are electrically connected to a bezel transmission line 10, thereby reducing the voltage drop on the first transmission line 21 and improving the brightness uniformity of the whole screen. In this embodiment of the invention, there are two bezel transmission lines 10, and the number of first connecting lines L1 is correspondingly two, with the bezel transmission lines 10 and the first connecting lines L1 connected one-to-one. The two first connecting lines L1 are located in the first edge area and the second edge area of ​​the binding area Q2, respectively; the first connecting line L1 located in the first edge area is electrically connected to the first bezel transmission line 11, and the second connecting line L2 located in the second edge area is electrically connected to the second bezel transmission line 12. The binding area Q2 includes a middle area and a first edge area and a second edge area located on both sides of the middle area; the first edge area, the middle area and the second edge area are arranged sequentially along the first direction X.

[0100] Based on the above embodiments, optionally, refer to... Figure 9 The display area AA includes a first side S1 and a second side S2 that are disposed opposite to each other, and a third side S3 that connects the first side S1 and the second side S2; the binding area Q2 is located on one side of the third side S3 of the display area AA; at least a portion of the first frame transmission line 11 extends along the first side S1, and at least a portion of the second frame transmission line 12 extends along the second side S2.

[0101] The shape of the display area AA can be a rectangle, an arc-shaped rectangle, a circle, an ellipse, etc. The first side S1 can be a straight edge, an arc edge, or a combination of straight and arc edges; the second side S2 can be a straight edge, an arc edge, or a combination of straight and arc edges; the third side S3 can be a straight edge, an arc edge, or a combination of straight and arc edges.

[0102] Based on the above embodiments, in one embodiment of the present invention, the shape of the display area AA is an arc-shaped rectangle; the first side S1, the second side S2 and the third side S3 are all straight sides.

[0103] The third side S3 is connected to the first side S1 by an arc-shaped edge; the first frame transmission line 11 includes a first straight transmission segment 111 extending along the first side S1, a second straight transmission segment 112 extending along the third side S3, and a first arc-shaped transmission segment 113 connecting the first straight transmission segment 111 and the second straight transmission segment 112; the first connecting line L1, which is electrically connected to the first frame transmission line 11, extends from the first terminal located in the first edge area along the second direction Y to the second straight transmission segment 112 and is electrically connected to the second straight transmission segment 112.

[0104] The third side S3 and the second side S2 are connected by an arc-shaped edge; the second frame transmission line 12 includes a third straight transmission segment 121 extending along the second side S2, a fourth straight transmission segment 122 extending along the third side S3, and a second arc-shaped transmission segment 123 connecting the third straight transmission segment 121 and the fourth straight transmission segment 122; the first connecting line L1 electrically connected to the second frame transmission line 12 extends from the first terminal located in the second edge area along the second direction Y to the fourth straight transmission segment 122 and is electrically connected to the fourth straight transmission segment 122.

[0105] Based on the above embodiments, optionally, refer to... Figure 9 and Figure 10 The display module also includes a third terminal for transmitting a second power supply voltage and a third connecting line L3 electrically connected to the third terminal. The third terminal and the third connecting line L3 are located in the binding point area Q2, and the third connecting line L3 is located between the first connecting line L1 and the second connecting line L2. The third connecting line L3 is used to transmit the second power supply voltage to the light-emitting device in the display area AA. The second power supply voltage can be the anode voltage ELVDD.

[0106] Based on the above embodiments, optionally, the display module further includes multiple metal layers and a second insulating layer located between adjacent metal layers, the multiple metal layers being located on the same side of the substrate 01; the frame transmission line 10 is located in at least one metal layer, the first connection line L1 is located in at least one metal layer, and the second connection line L2 is located in at least one metal layer.

[0107] Specifically, the border transmission line 10 is located in at least one metal layer, that is, each border transmission line 10 can be located in one metal layer, and the border transmission line 10 is a single-film transmission line. Alternatively, each border transmission line 10 can also be located in two or more metal layers, and the border transmission line 10 is a multi-film transmission line.

[0108] The first connection line L1 is located in at least one metal layer, that is, each first connection line L1 can be located in one metal layer and the first connection line L1 is a single-film transmission line. Alternatively, each first connection line L1 can also be located in two or more metal layers and the first connection line L1 is a multi-film transmission line.

[0109] The second connection line L2 is located in at least one metal layer, that is, each second connection line L2 can be located in one metal layer and the second connection line L2 is a single-film transmission line. Alternatively, each second connection line L2 can also be located in two or more metal layers and the second connection line L2 is a multi-film transmission line.

[0110] Preferably, the second connecting line L2 is a multi-layer transmission line. Setting the second connecting line L2 as a multi-layer structure reduces its resistance, thereby matching the transmission path impedance of the current flowing through the first connecting line L1 with that of the current flowing through the second connecting line L2. This further reduces the current input from the first connecting line L1, effectively reducing the current at the bottleneck location. This allows for a narrow bezel in the display module while meeting the brightness requirements of the display module in high-brightness mode.

[0111] Preferably, the first transmission line 21 and the second transmission line 22 are located in different metal layers, and the first transmission line 21 and the second transmission line 22 are electrically connected at the intersection through a through-hole penetrating the second insulating layer.

[0112] Optionally, the metal layer on which the frame transmission line 10 is located is the same as the metal layer on which at least one of the first transmission line 21 and the second transmission line 22 is located; and / or, the metal layer on which the first connecting line L1 is located is the same as the metal layer on which at least one of the first transmission line 21 and the second transmission line 22 is located; and / or, the metal layer on which the second connecting line L2 is located is the same as the metal layer on which at least one of the first transmission line 21 and the second transmission line 22 is located.

[0113] The mesh transmission structure 20, the frame transmission line 10, the first connecting line L1 and the second connecting line L2 are located in at least one of the third metal layer, the fourth metal layer and the fifth metal layer in the display module.

[0114] Based on the above embodiments, optionally, the border area Q1 further includes: a border connection line 40 located between the border transmission line 10 and the display area AA; the metal layer where the border connection line 40 is located is different from the metal layer where the border transmission line 10 is located; wherein, the vertical projection of the border connection line 40 on the substrate 01 partially overlaps with the vertical projection of the border transmission line 10 on the substrate 01, and they overlap in the overlapping area; the first transmission line 21 located in the display area AA is electrically connected to the border transmission line 10 through the border connection line 40; preferably, the border connection line 40 is disposed on the same layer as the anode in the light-emitting device layer.

[0115] This invention also provides a display device, including a display module and a ghosting elimination device for the display module as described in any embodiment of this invention. Therefore, this display device also possesses the beneficial effects described in any of the above embodiments. The ghosting elimination device for the display module can be integrated onto the driver chip in the display device. Figure 11 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention, for reference. Figure 11 In this embodiment, the display device 100 can be a mobile phone or any electronic product with display function, including but not limited to the following categories: display modules in products such as televisions, laptops, desktop monitors, tablets, digital cameras, smart bracelets, smart glasses, in-vehicle displays, medical devices, industrial control equipment, and touch interactive terminals. This embodiment of the invention does not impose any special limitations on this.

[0116] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A display module, characterized in that, include: Display area and non-display area; The non-display area includes a border area surrounding the display area and a binding area located on one side of the display area, the binding area being connected to the display area through the border area; The display module also includes: A mesh transmission structure is located in the display area of ​​the display module; A border transmission line is located in the border area of ​​the display module; the border transmission line is electrically connected to the mesh transmission structure. A first connecting line and a second connecting line, wherein the first connecting line is located at the edge of the bonding area of ​​the display module and extends to the border area to be electrically connected to the border transmission line; the second connecting line is located in the middle area of ​​the bonding area of ​​the display module. Multiple power supply voltage terminals are located in the bonding area; among the multiple power supply voltage terminals, the power supply voltage terminal for inputting a first power supply voltage includes a first terminal and a second terminal, wherein the first terminal is located in the edge area of ​​the bonding area, and the second terminal is located in the middle area of ​​the bonding area; the first terminal is electrically connected to the frame transmission line through the first connecting line; the second terminal is electrically connected to the mesh transmission structure through the second connecting line.

2. The display module according to claim 1, characterized in that, The display module also includes: Substrate; A light-emitting device layer is located on one side of the substrate and in the display area; the mesh transmission structure is electrically connected to the light-emitting device layer and is used to provide a first power supply voltage to the light-emitting devices in the light-emitting device layer; Preferably, among the plurality of power supply voltage terminals, the power supply voltage terminals used for inputting the first power supply voltage include only the first terminal and the second terminal; Preferably, the first power supply voltage is the cathode voltage of the light-emitting device.

3. The display module according to claim 1, characterized in that, The mesh transmission structure includes: Multiple first transmission lines extending along a first direction and arranged sequentially along a second direction; Multiple second transmission lines extending along a second direction and arranged sequentially along a first direction; Wherein, the first direction and the second direction are intersecting; the first transmission line and the second transmission line are electrically connected at the intersection of the first transmission line and the second transmission line; each of the first transmission lines is electrically connected to the frame transmission line; Preferably, the first direction and the second direction are perpendicular to each other; Preferably, the second connecting line extends from the second terminal along the second direction of the display area; Preferably, the second terminal is located on the central axis of the bonding area in the second direction, or is located on one side of the central axis of the bonding area in the second direction and is adjacent to the central axis.

4. The display module according to claim 3, characterized in that, Also includes: The driver chip is bonded to the bonding area and is located between the second terminal and the display area; The second connecting line extends from the second terminal along the second direction through the area where the driver chip is located toward the display area; A first insulating layer is provided between the driver chip and the second connection line; Preferably, the material of the first insulating layer has thermal insulation properties.

5. The display module according to claim 4, characterized in that, Also includes: The driver chip is bonded to the bonding area and is located between the second terminal and the display area; The second connection line includes a first connection segment and a second connection segment. The first connection segment extends from the second terminal along the second direction to the driver chip and is electrically connected to a spare input terminal on the driver chip. The second connection segment is electrically connected to a spare output terminal on the driver chip and extends from the driver chip toward the display area.

6. The display module according to claim 4 or 5, characterized in that, The display bezel area further includes: a signal gathering connection part, which is used to electrically connect the second connection line and the mesh transmission structure; The signal gathering connection is electrically connected to at least one second transmission line located in the middle area of ​​the display area; Preferably, there are multiple second connecting lines, and one end of each second connecting line near the display area is electrically connected to the signal gathering connection part.

7. The display module according to claim 3, characterized in that, The number of the frame transmission lines is two, namely a first frame transmission line and a second frame transmission line; the first frame transmission line and the second frame transmission line are located on opposite sides of the display area; one end of each first transmission line is electrically connected to the first frame transmission line and the other end is electrically connected to the second frame transmission line. The number of the first connecting lines is two, located in the first edge area and the second edge area of ​​the binding area respectively. The binding area includes a middle area and a first edge area and a second edge area located on opposite sides of the middle area. The first edge area, the middle area and the second edge area are arranged sequentially along the first direction. The first connecting line located in the first edge area is electrically connected to the first frame transmission line, and the second connecting line located in the second edge area is electrically connected to the second frame transmission line. Preferably, the display area includes a first side and a second side disposed opposite to each other, and a third side connecting the first side and the second side; the binding area is located on one side of the third side of the display area; at least a portion of the first frame transmission line extends along the first side, and at least a portion of the second frame transmission line extends along the second side. Preferably, the third side is connected to the first side by an arc-shaped edge; the first frame transmission line includes a first straight transmission segment extending along the first side, a second straight transmission segment extending along the third side, and a first arc-shaped transmission segment connecting the first straight transmission segment and the second straight transmission segment; a first connecting line electrically connected to the first frame transmission line extends from a first terminal located in the first edge area along the second direction to the second straight transmission segment, and is electrically connected to the second straight transmission segment; Preferably, the third side and the second side are connected by an arc-shaped edge; the second frame transmission line includes a third straight transmission segment extending along the second side, a fourth straight transmission segment extending along the third side, and a second arc-shaped transmission segment connecting the third straight transmission segment and the fourth straight transmission segment; a first connecting line electrically connected to the second frame transmission line extends from a first terminal located in the second edge area along the second direction to the fourth straight transmission segment, and is electrically connected to the fourth straight transmission segment.

8. The display module according to claim 3, characterized in that, It also includes multiple metal layers located on the same side of the substrate, and a second insulating layer is disposed between adjacent metal layers; The frame transmission line is located in at least one metal layer; the first connection line is located in at least one metal layer; the second connection line is located in at least one metal layer; Preferably, the first transmission line and the second transmission line are located in different metal layers, and the first transmission line and the second transmission line are electrically connected at the intersection through a through-hole penetrating the second insulating layer; Preferably, the second connecting line is composed of multiple layers of metal traces.

9. The display module according to claim 8, characterized in that, The border area further includes: a border connecting line, located between the border transmission line and the display area; the metal layer where the border connecting line is located is different from the metal layer where the border transmission line is located. Wherein, the vertical projection of the border connecting line on the substrate partially overlaps with the vertical projection of the border transmission line on the substrate, and they overlap in the overlapping area; the first transmission line located in the display area is electrically connected to the border transmission line through the border connecting line; Preferably, the frame connecting line is disposed on the same layer as the anode in the light-emitting device layer.

10. A display device, characterized in that, Includes the display module described in any one of claims 1 to 9.

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