Irregular display panel, binding method thereof and irregular display module

Abstract

The application provides a special-shaped display panel, a binding method thereof and a special-shaped display module. The special-shaped display panel comprises a first pad group arranged in a binding area of the special-shaped display panel. The binding area is arc-shaped at least at an edge away from a display area. The arc-shaped edge coincides with an edge of an opposite non-display area. The first pad group comprises a plurality of first sub-pads arranged at intervals in a second direction. The plurality of first sub-pads respectively extend in a first direction. The plurality of first sub-pads are arranged in an arc shape along an arc line of the arc-shaped edge in the binding area. According to the application, the binding area is arranged according to the edge shape of the original circular display panel, so that the plurality of mutually independent first sub-pads arranged in the binding area are arranged in an arc shape along the shape of the edge. Each first sub-pad extends in the first direction, which is conducive to improving the display area ratio while taking into account the display effect.

Description

Technical Field

[0001] This application relates to the field of semiconductor technology, specifically to an irregularly shaped display panel and its bonding method, and an irregularly shaped display module. Background Technology

[0002] Currently, with the development of display technology, display modules are widely used in wearable devices. In wearable devices, such as round watches, the bottom bezel needs to have a protruding straight edge to meet the bonding requirements of the circuit board. As users have increasingly higher requirements for display performance, narrow bezel technology has emerged. However, for round screens, narrowing the bottom bezel would reduce the bonding area of ​​the circuit board, failing to meet the bonding requirements and thus affecting display performance, preventing further increases in the display area ratio. Summary of the Invention

[0003] This application provides an irregularly shaped display panel and its binding method, as well as an irregularly shaped display module, to improve the proportion of the display area in the display module while taking display performance into account.

[0004] In a first aspect, an irregularly shaped display panel is provided, having a display area and a non-display area surrounding the display area. A bonding area is provided in the non-display area located on one side of the display area in a first direction. The irregularly shaped display panel includes: a first pad group disposed in the bonding area of ​​the irregularly shaped display panel. The bonding area has an arc-shaped edge at least on the side away from the display area, and the arc-shaped edge coincides with the edge of the opposite non-display area. The first pad group includes a plurality of first sub-pads arranged at intervals along a second direction. The first direction and the second direction intersect. The plurality of first sub-pads extend along the first direction respectively. Each or more first sub-pads are connected to a signal line of the irregularly shaped display panel. The plurality of first sub-pads are arranged in an arc shape along the arc of the arc-shaped edge in the bonding area. Among the plurality of first sub-pads arranged along the second direction, at least one first sub-pad located in the middle position extends for a longer length in the first direction than any other first sub-pad extends for a longer length in the first direction.

[0005] In conjunction with the first aspect, in some implementations of the first aspect, multiple first sub-pads occupy the same area in the bonding area. The first sub-pads are set to be an odd number of independent entities. Based on the centerline extending along the first direction and passing through the center of the irregular display panel, the length of one or fewer odd number of first sub-pads located near the centerline in the second direction is greater than the length of any first sub-pad in the first direction, and the width of one or fewer odd number of first sub-pads located near the centerline in the second direction is less than the width of any first sub-pad in the second direction; or, the first sub-pads are set to be an even number of independent entities. Based on the centerline, the length of one or fewer even number of first sub-pads near the centerline in the second direction is greater than the length of any first sub-pad in the first direction, and the width of multiple even number of first sub-pads near the centerline in the second direction is less than the width of any first sub-pad in the second direction.

[0006] In conjunction with the first aspect, in some implementations of the first aspect, along the second direction, in the bonding area extending from the center line to both sides, the length of the plurality of first sub-pads extending in the first direction gradually shortens; and / or, along the second direction, in the bonding area extending from the center line to both sides, the width of the plurality of first sub-pads extending in the second direction gradually shortens.

[0007] In conjunction with the first aspect, in some implementations of the first aspect, along the first direction, the minimum distance from the side of each first sub-pad facing the arc edge to the arc edge is the same; and / or, along the second direction, the spacing between any two adjacent first sub-pads is the same.

[0008] In conjunction with the first aspect, in some implementations of the first aspect, the first sub-pad is configured as an elongated structure extending along a first direction, and the difference in length between two adjacent first sub-pads extending in the first direction is less than or equal to the gap between them; or, the first sub-pad is configured as a trapezoidal structure extending along the first direction, and the side of the trapezoidal structure facing the arc edge has a first width in a second direction, and the side of the trapezoidal structure away from the arc edge has a second width in a second direction, and the first width is less than the second width.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, the signal lines comprise multiple lines with different cross-sectional areas, and the width of each signal line in the second direction is not greater than the total width of the one or more first sub-pads connected to in the second direction.

[0010] In conjunction with the first aspect, some implementations of the first aspect further include: a circuit board assembly, which is bonded to the bonding area of ​​the irregularly shaped display panel, and the circuit board assembly has a connection area at one end in the first direction; a second pad assembly, which is arranged in the connection area, and the second pad assembly includes a plurality of second sub-pads arranged at intervals along the second direction, wherein when the circuit board assembly is bonded to the bonding area, the plurality of first sub-pads correspond one-to-one with the plurality of second sub-pads.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, the shapes of the multiple second sub-pads are the same as the shapes of the corresponding first sub-pads, and when the circuit board assembly is bonded to the bonding area, in the vertical projection of each corresponding first sub-pad onto the circuit board assembly, the first sub-pad is located within the second sub-pad, and the area of ​​the second sub-pad is greater than or equal to the area of ​​the corresponding first sub-pad.

[0012] In a second aspect, an irregularly shaped display device is provided, comprising an irregularly shaped display panel as described above; and a flip-chip film covering at least the bonding area of ​​the irregularly shaped display panel.

[0013] Thirdly, a bonding method for an irregularly shaped display panel is provided, applied to the bonding of the irregularly shaped display panel described above. The bonding area is configured to bond a circuit board assembly. The bonding method includes: providing an irregularly shaped display panel, wherein the edge of the irregularly shaped display panel is arc-shaped, and the edge of the bonding area away from the display area is an arc-shaped edge matching the arc; arranging a first pad group in the bonding area of ​​the irregularly shaped display panel, such that a plurality of first sub-pads in the first pad group are independent of each other, and the plurality of first sub-pads extend along a first direction respectively, each or more first sub-pads being connected to a signal line of the irregularly shaped display panel, the plurality of first sub-pads being arranged in an arc shape along the arc of the arc edge in the bonding area, and among the plurality of first sub-pads arranged along a second direction, at least one first sub-pad located in the middle position has an extension length in the first direction greater than the extension length of any first sub-pad in the first direction; taking a circuit board assembly and bonding the circuit board assembly to the plurality of first sub-pads respectively.

[0014] This application provides an irregularly shaped display panel having a display area and a non-display area surrounding the display area. A bonding area is provided in the non-display area located on one side of the display area in a first direction. The irregularly shaped display panel includes: a first pad group disposed in the bonding area of ​​the irregularly shaped display panel. The bonding area has an arc-shaped edge at least on the side away from the display area, and the arc-shaped edge coincides with the edge of the opposite non-display area. The first pad group includes a plurality of first sub-pads arranged at intervals along a second direction. The first direction and the second direction intersect. The plurality of first sub-pads extend along the first direction respectively. Each or more first sub-pads are connected to a signal line of the irregularly shaped display panel. The plurality of first sub-pads are arranged in an arc shape along the arc of the arc-shaped edge in the bonding area. Among the plurality of first sub-pads arranged along the second direction, at least one first sub-pad located in the middle position extends for a longer length in the first direction than any other first sub-pad extends for a longer length in the first direction.

[0015] This application embodiment sets a bonding area based on the edge shape of the original circular display panel, so that multiple independent first sub-pads arranged in the bonding area are arranged in an arc shape along the edge shape. Each first sub-pad extends along a first direction, which helps to increase the display area ratio while providing enough space to arrange the first sub-pads to connect multiple signal lines, ensuring display effect and facilitating the realization of narrow bezels for irregularly shaped display panels. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and constitute a part of this application, illustrate exemplary embodiments of the application and are used to explain the application, but do not constitute an undue limitation of the application. In the drawings:

[0017] Figure 1 This is a top view of an irregularly shaped display module before it is bent.

[0018] Figure 2 This is a top view of an irregularly shaped display module provided in an embodiment of this application before bending.

[0019] Figure 3 This is a top view of an irregularly shaped display panel provided in an embodiment of this application.

[0020] Figure 4 This is a schematic diagram of the arrangement of a first sub-pad in the bonding area according to an embodiment of this application.

[0021] Figure 5 This is a schematic diagram of the first sub-pad arranged in the bonding area, according to another embodiment of this application.

[0022] Figure 6 This is a schematic diagram of the first sub-pad arranged in the bonding area, according to another embodiment of this application.

[0023] Figure 7 This is a schematic diagram showing the correspondence between the first sub-pad and the signal line in one embodiment of this application.

[0024] Figure 8 This is a schematic diagram of a circuit board assembly provided in one embodiment of this application.

[0025] Figure 9 This is a cross-sectional view of a circuit board assembly bonded to the bonding area according to an embodiment of this application.

[0026] Figure 10 This is a flowchart of a method for binding an irregularly shaped display panel in one embodiment of this application. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Many specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The features and exemplary embodiments of various aspects of this application will be described in detail below.

[0028] Figure 1 This is a top view of an irregularly shaped display module before bending. Arrow X points in the first direction, and arrow Y points in the second direction. The first direction X and the second direction Y intersect. In this embodiment, the first direction X and the second direction Y are perpendicular to each other, and the first direction X and the second direction Y are perpendicular to the thickness direction of the irregularly shaped display module.

[0029] like Figure 1 The irregularly shaped display module 10' includes an irregularly shaped display panel 1', which has a display area AA and a non-display area NN surrounding the display area AA. A bonding area NS' is provided in the non-display area NN located on one side of the display area AA in the first direction X. That is, the non-display area NN with the bonding area NS' is referred to as the lower edge of the irregularly shaped display module 10', and the bonding area NS' is used to bond and connect the circuit board assembly 2'.

[0030] It is understood that the irregularly shaped display module 10' can be, for example, a watch, an in-vehicle display device, glasses, or other related devices. In this embodiment, the irregularly shaped display module 10' is set as a wearable device, such as a round watch. In this case, the display area AA of the irregularly shaped display panel 1' is circular, and the non-display area NN is a ring structure surrounding the outer periphery of the display area AA. The binding area NS' is set in the non-display area NN on one side of the display area AA in the first direction X, and is referred to here as the bottom border. This will not be emphasized separately thereafter.

[0031] In wearable devices with display functions, such as electronic watches, glasses, and helmets, the irregularly shaped display module 10' used can be an organic light-emitting diode (OLED) display module or a liquid crystal display (LCD) display module, depending on the application field. Furthermore, depending on the user's needs, the irregularly shaped display module 10' can be a foldable display module or a non-foldable display module. This invention does not impose any specific limitations on it.

[0032] exist Figure 1 In the irregularly shaped display panel 1', the edge of its lower border is a straight line. The irregularly shaped display panel 1' is not circular as a whole, but has a protruding straight sub-border NN1 at its lower border. The bonding area NS' is at least partially located at the straight sub-border NN1 to facilitate the arrangement of the pad group 11' in the bonding area NS'. Multiple pads in the pad group 11' are arranged along the straight extension direction of the straight sub-border NN1. The protruding straight sub-border NN1 provides sufficient space for the bonding area NS' to arrange the pad group 11', so that the circuit board group 2' can be bonded to the pad group 11'.

[0033] Optionally, the circuit board assembly 2' includes gold fingers 21', a driver chip 22, and a flexible circuit board 23. The gold fingers 21' are bonded to the pad group 11' of the bonding area NS' by setting pads that match the pad group 11'. After the circuit board assembly 2' is bonded, the flexible circuit board 23 is bent, so that the driver chip 22 is located below the irregular display panel 1', which is beneficial to achieving a narrow bezel.

[0034] It is understood that the irregularly shaped display panel 1' includes an array substrate. The display area AA of the array substrate is sequentially stacked with polarizers, cover plates, etc. The non-display area NN of the array substrate is provided with a bonding area NS', and a pad group 11' is arranged in the bonding area NS'. The array substrate has multiple signal lines 3 extending along a first direction X to connect the light-emitting devices of the display area AA to the pad group 11' of the bonding area NS', and multiple signal lines 3 extending along a second direction Y to connect different light-emitting devices. Additionally, the array substrate may also have multiple signal lines 3 connecting the display area AA and the pad group 11' of the bonding area NS' for implementing touch functionality; these will not be described in detail.

[0035] It should be emphasized that the circuit board assembly 2' is provided with a pad structure that matches the pad group 11' of the bonding area NS'. When the circuit board assembly 2' is bonded to the bonding area NS' of the irregular display panel 1', the pad group 11' is soldered to the matching pad structure. The multiple signal lines 3 in the irregular display panel 1' that are connected to the pad group 11' are electrically connected to the driver chip 22 on the circuit board assembly 2' through the soldering of the pad group 11' and the pad structure, so as to realize the corresponding display, touch and other functions. This will not be described in detail here.

[0036] Because a protruding straight sub-border NN1 is required to accommodate sufficient pad groups 11' in the bonding area NS', narrowing the bottom border would result in insufficient space for pad groups 11', thus affecting the display effect. This would prevent the irregularly shaped display panel 1' from achieving a true circular or elliptical structure, and would also fail to balance display performance and increase the screen occupancy of the display area AA, which is not conducive to the realization of a narrow bezel.

[0037] To further narrow the bezel of irregularly shaped displays and increase the proportion of the display area while ensuring sufficient space for pad groups to improve display performance, the structure of the pad groups and their layout in the bonding area can be adjusted. This allows the irregularly shaped display panel to be made into a circular or elliptical structure, while ensuring that multiple sub-pads in the pad group extend along a first direction, are independent of each other, and are arranged in an arc shape along the curved edge of the irregularly shaped display panel. This provides sufficient space for sub-pads in the bonding area without adding additional straight sub-bezels, ensuring bonding strength and stability. This guarantees the display effect of the irregularly shaped display panel while increasing the proportion of the display area in the irregularly shaped display panel, which is beneficial for further achieving narrow bezels.

[0038] In view of this, this application provides an irregularly shaped display panel and its bonding method, as well as an irregularly shaped display module, which can improve the proportion of the display area in the display module while taking display performance into account.

[0039] Figure 2 This is a top view of an irregularly shaped display module provided in an embodiment of this application before bending. Figure 3This is a top view of an irregularly shaped display panel provided in an embodiment of this application. Figure 4 This is a schematic diagram of the first sub-pad arranged in the bonding area according to an embodiment of this application. Arrow X points in the first direction, and arrow Y points in the second direction. The first direction X and the second direction Y intersect. In this embodiment, the first direction X and the second direction Y are perpendicular to each other, and the first direction X and the second direction Y are perpendicular to the thickness direction of the irregular display module 10 in pairs, which will not be emphasized separately thereafter.

[0040] like Figure 2 and Figure 3 The irregularly shaped display module 10 can be a wearable watch in a round or oval shape, wearable glasses in a round or oval shape, or a round or oval vehicle display screen. It can be adapted to actual needs and is not specifically limited. In this embodiment, the irregularly shaped display module 10 is set as a wearable round watch, and the irregularly shaped display panel 1 is a round display panel.

[0041] like Figures 2 to 4 The irregularly shaped display panel 1 includes a first pad group, which is disposed in the bonding area NS of the irregularly shaped display panel 1. The bonding area NS has an arc-shaped edge N1 at least on the side away from the display area AA. The arc-shaped edge N1 coincides with the edge of the opposite non-display area NN. The first pad group includes a plurality of first sub-pads 11 arranged at intervals along the second direction Y. The first direction X and the second direction Y intersect. The plurality of first sub-pads 11 extend along the first direction X respectively. Each or more first sub-pads 11 is connected to a signal line 3 of the irregularly shaped display panel 1. The plurality of first sub-pads 11 are arranged in an arc shape along the arc of the arc-shaped edge N1 in the bonding area NS. Among the plurality of first sub-pads 11 arranged along the second direction Y, at least one first sub-pad 11 located in the middle position extends in the first direction X for a longer length than any other first sub-pad 11 extends in the first direction X.

[0042] It is understood that the embodiments of this application... Figure 2 Compared with existing technologies Figure 1 In comparison, Figure 1In the original design, multiple pads in the pad group 11' are at least partially disposed on the straight sub-border NN1. The straight edge of the straight sub-border NN1 extends along the second direction Y, and the multiple pads in the pad group 11' are arranged at intervals along the second direction Y. The straight sub-border NN1 is necessary to provide sufficient space for the pad group 11' on the lower border. If the straight sub-border NN1 is narrowed or even removed to make the irregular display panel 1 circular, there will be insufficient space to set the bonding area NS, which will not meet the arrangement requirements of the pad group 11'. Consequently, multiple signal lines 3 in the irregular display panel 1 will not have enough pads for connection, thus affecting the display effect. In the embodiment of this application, the irregular display panel 1, in Figure 2 In the process, the binding area NS is set so that the edge of the binding area NS away from the display area AA is set as an arc edge N1, and multiple independent first sub-pads 11 are arranged sequentially along the arc edge N1. The multiple first sub-pads 11 extend along the first direction X, which is beneficial to arrange enough first sub-pads 11 in a limited space to connect the signal lines 3 respectively. This is beneficial to increase the proportion of the display area AA on the irregular display panel 1, while allowing the binding area NS to arrange more first sub-pads 11, thereby ensuring the display performance of the irregular display panel 1 and helping to achieve a narrow bezel.

[0043] Therefore, the irregular display panel 1 provided in this application embodiment sets a bonding area NS according to the edge shape of the circle on the basis of the original circular display panel, so that multiple independent first sub-pads 11 arranged in the bonding area NS are arranged in an arc shape along the edge shape. Each first sub-pad 11 extends along the first direction X, which is beneficial to increase the proportion of the display area AA, while having enough space to arrange the first sub-pads 11 to connect multiple signal lines 3, ensuring the display effect, and is beneficial to realizing the narrow bezel of the irregular display panel 1.

[0044] It is understandable that the size and shape of the bonding area NS in the non-display area NN can be adaptively adjusted according to the size of the first pad group, without specific limitations.

[0045] Furthermore, the arcuate edge N1 of the binding area NS can partially coincide with the edge of the non-display area NN, or it can completely coincide with the edge of the non-display area NN. That is, the arcuate edge N1 of the binding area NS can be set to a structure that matches the arc of the non-display area NN, or it can be set to a non-matching arcuate structure, such as a wave shape composed of multiple arcs, which can be adaptively adjusted according to actual needs. In the embodiments of this application, the arcuate edge N1 of the binding area NS is set to a circular arc structure that completely coincides with the edge of the non-display area NN, so as to increase the space of the binding area NS in the limited non-display area NN, but it is not limited to this.

[0046] Optionally, the number of the multiple first sub-pads 11 in the first pad group can be adaptively adjusted according to the number of signal lines 3 required to be connected to the driver chip 22 in the irregular display panel 1 and the specific connection method between the signal lines 3 and the first sub-pads 11, without specific limitation. In this embodiment, for ease of explanation and observation and understanding, the number of first sub-pads 11 in the first pad group is set to seven, but it is not limited to this.

[0047] Optionally, the multiple first sub-pads 11 can be further divided into multiple groups according to the different types of signal lines 3 connected. Each group of multiple adjacent first sub-pads 11 is used to connect a type of signal line 3 of the same thickness. The impedance can be adjusted by selecting whether to connect one first sub-pad 11 or multiple first sub-pads 11 according to the thickness of the signal line 3. No specific limitation is made.

[0048] In some embodiments, the multiple first sub-pads 11 occupy the same area in the bonding area NS. That is, in the multiple first sub-pads 11 of the same first pad group, the area of ​​each first sub-pad 11 is fixed regardless of the changes in the length in the first direction X, the width in the second direction Y, and the specific shape of the first sub-pad 11.

[0049] When the first sub-pad 11 is set to an odd number of mutually independent pads (e.g.) Figure 3 and Figure 4 Taking the center line 1a extending along the first direction X and passing through the center of the irregular display panel 1 as a reference, in the second direction Y, an odd number of first sub-pads 11 located near the center line 1a, whose length in the first direction X is greater than the length of any first sub-pad 11 extending in the first direction X, and the width of an odd number of first sub-pads 11 located near the center line 1a, whose width in the second direction Y is less than the width of any first sub-pad 11 extending in the second direction Y.

[0050] When the first sub-pads 11 are set to an even number of independent entities (not shown in the figure), with the center line 1a as a reference, the length of the even number of first sub-pads 11 near the center line 1a in the second direction Y, which is less than the total number of first sub-pads 11, extends in the first direction X, which is greater than the length of any first sub-pad 11 extending in the first direction X. Moreover, the width of the even number of first sub-pads 11 near the center line 1a, which is less than the total number of first sub-pads 11, extends in the second direction Y, which is less than the width of any first sub-pad 11 extending in the second direction Y.

[0051] It is understandable that, regardless of whether the total number of first sub-pads 11 is odd or even, the length of the first sub-pad 11 in the first direction X and the width in the second direction Y can be adjusted to adapt to the position of the bonding area NS, so that more first sub-pads 11 can be arranged on the limited bonding area NS, thereby increasing the area ratio of the first sub-pads 11 in the bonding area NS and facilitating the connection of sufficient signal lines 3.

[0052] Optionally, with the center line 1a as a reference, a plurality of first sub-pads 11 are symmetrically arranged on both sides of the center line 1a to match the plurality of signal lines 3 with different signals arranged along the first direction X in the irregular display panel 1.

[0053] Optionally, along the second direction Y, from the center line 1a to the bonding areas NS on both sides, the length of the plurality of first sub-pads 11 extending in the first direction X gradually shortens; and / or, along the second direction Y, from the center line 1a to the bonding areas NS on both sides, the width of the plurality of first sub-pads 11 extending in the second direction Y gradually shortens. This layout, which gradually changes from the middle to both ends, matches the shape of the arc-shaped edge N1 of the bonding area NS, further improving the rationality and quantity of the first sub-pad layout, so as to achieve a sufficient number of first sub-pads 11 in a limited space to meet the connection requirements of the signal lines 3.

[0054] It is understandable that, along the first direction X, the minimum distance from the side of each first sub-pad 11 facing the arc edge N1 to the arc edge N1 is the same, so that the bonding area NS can arrange a first sub-pad 11 of sufficient length in the first direction X, further increasing the area occupied by the first sub-pad 11 in the bonding area NS, which is beneficial to increasing the number of first sub-pads 11 arranged.

[0055] Optionally, along the second direction Y, the spacing between any two adjacent first sub-pads 11 is the same, so as to match the arrangement of multiple signal lines 3 of different types along the second direction Y in the irregular display template.

[0056] Figure 5 This is a schematic diagram of the first sub-pad arranged in the bonding area, according to another embodiment of this application. Figure 6 This is a schematic diagram of the first sub-pad arranged in the bonding area, according to another embodiment of this application.

[0057] like Figures 4 to 6 The edge of the binding area NS facing the display area AA can be an arc edge matching the arc edge N1, or it can be a straight edge extending along the second direction Y. It can be adaptively adjusted according to actual needs and is not specifically limited. In this embodiment, the edge of the binding area NS facing the display area AA is set as a straight edge extending along the second direction Y.

[0058] like Figure 4 The first sub-pad 11 is configured as an elongated structure extending along the first direction X, and the difference in length between two adjacent first sub-pads 11 extending along the first direction X is less than or equal to the gap between them. By configuring the first sub-pad 11 as an elongated structure extending along the first direction X, the processing of the edge first sub-pad 11 can be improved, the processing speed can be increased, and the processing cost can be reduced.

[0059] It is understandable that when multiple first sub-pads 11 are configured as elongated structures extending along the first direction X, based on the length of the bonding area NS in the second direction Y and the required number of first sub-pads 11, without changing the gap between adjacent first sub-pads 11, the difference in length between any two adjacent first sub-pads 11 in the first direction X is less than or equal to 1 mm. This is beneficial for arranging a larger number of first sub-pads 11 in a limited space, thereby meeting the connection requirements of multiple signal lines 3.

[0060] It should be emphasized that the difference in width between two adjacent first sub-pads 11 in the second direction Y can be adaptively adjusted according to the length adjustment, so as to meet the requirement that each first sub-pad 11 has the same area, without making specific limitations.

[0061] For example, such as Figure 4 Each first sub-pad 11 has a length of L in the first direction X and a width of D in the second direction Y. The distance between two adjacent first sub-pads 11 is M. The length L and width D of each first sub-pad 11 are not equal, but the area of ​​each first sub-pad 11 is equal. Looking from the center line 1a along the first direction X to both sides, the length L of the first sub-pad 11 gradually decreases, the width D gradually increases, and the distance M between two adjacent first sub-pads 11 remains unchanged.

[0062] It is understandable that, based on setting the first sub-pad 11 as an elongated strip structure extending along the first direction X, the spacing between two adjacent first sub-pads 11 is set to be the same as in the original technical solution (e.g., Figure 1 The spacing between the pads set in the diagram is the same, and will not be described in detail.

[0063] In some embodiments, such as Figure 5 and Figure 6 The first sub-pad 11 is configured as a trapezoidal structure extending along the first direction X, and the side of the trapezoidal structure facing the arc edge N1 has a first width in the second direction Y, and the side of the trapezoidal structure away from the arc edge N1 has a second width in the second direction Y. The first width is smaller than the second width to match the bonding area NS with the arc edge N1, which is beneficial to be able to arrange more first sub-pads 11 in the same bonding area NS.

[0064] It is understandable that when multiple first sub-pads 11 are configured as trapezoidal structures extending along the first direction X, the difference between the first width and the second width in each first sub-pad 11 is greater than or equal to 1 mm, based on the length of the bonding area NS arranged in the second direction Y and the number of first sub-pads 11 arranged. This is beneficial for arranging more first sub-pads 11 in a limited space, thereby further improving the connection requirements of multiple signal lines 3.

[0065] It should be emphasized that, among two adjacent first sub-pads 11, on the side with the first width, the two first sub-pads 11 have a first spacing in the second direction Y, and on the side with the second width, the two first sub-pads 11 have a second spacing in the second direction Y. The first spacing and the second spacing can be adaptively adjusted according to the specific dimensions set by the first width and the second width of the first sub-pad 11, without being specifically limited.

[0066] For example, such as Figure 5 and Figure 6 Each first sub-pad 11 has a length of L in the first direction X, a first width of D1 in the second direction Y towards the arc edge N1, and a second width of D2 away from the arc edge N1. The difference between the first width D1 and the second width D2 is greater than or equal to 1 mm. The first spacing between two adjacent first sub-pads 11 is M1, and the second spacing is M2. The length L, the first width D1, and the second width D2 of each first sub-pad 11 are not equal, but the area of ​​each first sub-pad 11 is equal. Looking from the center line 1a along the first direction X to both sides, the length L of the first sub-pad 11 gradually decreases, and the first width D1 and the second width D2 gradually increase with the same increasing trend. The first spacing M1 and the second spacing M2 between two adjacent first sub-pads 11 remain unchanged.

[0067] It is understandable that the second spacing M2 is set to be consistent with the original technical solution (such as...). Figure 1 The spacing between the pads set in the diagram is the same, and will not be described in detail.

[0068] Figure 7 This is a schematic diagram showing the correspondence between the first sub-pad and the signal line in one embodiment of this application.

[0069] like Figure 7 The signal line 3 includes multiple lines with different cross-sectional areas. The width of each signal line 3 in the second direction Y is not greater than the total width of the one or more first sub-pads 11 connected to in the second direction Y, so as to meet the impedance requirements of the signal line 3 of the corresponding signal connected.

[0070] It is understood that signal lines 3 may include, for example, three groups with different cross-sectional areas. The middle signal line 3, which is the widest in the second direction Y, serves as the first signal line 31. One or more corresponding first sub-pads 11 are selected below it based on the width of the first signal line 31, such that the sum of the widths of the connected one or more first sub-pads 11 in the second direction Y is greater than or equal to the width of the first signal line 31, to satisfy the corresponding impedance. Similarly, the second signal lines 32, located on both sides of the first signal line 31 and the second thickest, are selected below it and the first or more corresponding first sub-pads 11 are selected for connection, such that the sum of the widths of the connected one or more first sub-pads 11 in the second direction Y is greater than or equal to the width of the second signal line 32. The third signal lines 33, located on both sides of the first signal line 31 and the thinnest, are selected below it and the first or more corresponding first sub-pads 11 are selected for connection, such that the sum of the widths of the connected one or more first sub-pads 11 in the second direction Y is greater than or equal to the width of the third signal line 33. These connections can be adaptively adjusted according to actual needs and are not specifically limited.

[0071] Figure 8 This is a schematic diagram of a circuit board assembly provided in one embodiment of this application. Figure 9 This is a cross-sectional view of a circuit board assembly bonded to the bonding area according to an embodiment of this application.

[0072] In some embodiments, such as Figure 8 and Figure 9 The irregularly shaped display panel 1 also includes a circuit board group 2 and a second pad group. The circuit board group 2 is bonded to the bonding area NS of the irregularly shaped display panel 1. The circuit board group 2 has a connection area 21a at one end in the first direction X. The second pad group is arranged in the connection area 21a. The second pad group includes a plurality of second sub-pads 241 arranged at intervals along the second direction Y. When the circuit board group 2 is bonded to the bonding area NS, the plurality of first sub-pads 11 correspond one-to-one with the plurality of second sub-pads 241.

[0073] Optionally, when the circuit board assembly 2 includes a gold finger 21, a driver chip 22, and a flexible circuit board 23, the connection area 21a and the second pad group provided in the connection area 21a are provided on the gold finger 21, which will not be described in detail.

[0074] It is understood that the shapes of the multiple second sub-pads 241 are the same as the shapes of the corresponding first sub-pads 11. When the circuit board group 2 is bonded to the bonding area NS, in the vertical direction Z of the circuit board group 2, the first sub-pad 11 is located within the second sub-pad 241, and the area of ​​the second sub-pad 241 is greater than or equal to the area of ​​the corresponding first sub-pad 11.

[0075] Optionally, the first sub-pad 11 and the second sub-pad 241 can be soldered together so that the first sub-pad 11 and the second sub-pad 241 are fixedly connected by multiple solder points, thereby improving the stability and strength of the connection between the first sub-pad 11 and the second sub-pad 241.

[0076] It should be emphasized that the arrangement and shape of the multiple second sub-pads 241 on the circuit board group 2 can be referred to the relevant description of the first sub-pad 11 set in the bonding area NS, and will not be repeated here.

[0077] This application also provides an irregularly shaped display module, such as... Figure 2 The irregular display module 10 includes an irregular display panel 1 and a flip-chip film. The flip-chip film covers at least the bonding area NS of the irregular display panel 1 to further improve the stability and strength of the connection between the first sub-pad 11 and the second sub-pad 241 in the bonding area NS, and to prevent the second sub-pad 241 from easily falling off the soldered first sub-pad 11 under external force.

[0078] Optionally, the irregularly shaped display panel 1 can be referred to the relevant descriptions in the above embodiments, and will not be repeated here.

[0079] It is understood that the irregularly shaped display module 10 can be, for example, a watch, an in-vehicle display device, glasses, or other related devices. In this embodiment, the irregularly shaped display module 10 is configured as a wearable device, such as a round watch. In wearable devices with display functions, such as electronic watches, glasses, and helmets, the irregularly shaped display module 10 used can be an organic light-emitting diode (OLED) display module or a liquid crystal display (LCD) display module, depending on the application field. This invention does not specifically limit it here.

[0080] Figure 10 This is a flowchart of a method for binding an irregularly shaped display panel in one embodiment of this application.

[0081] This application also provides a method for binding irregularly shaped display panels, such as... Figure 10 As shown, this binding method is applied to the binding of the irregularly shaped display panel 1. The irregularly shaped display panel 1 can be referred to the relevant descriptions of the above embodiments. The steps of the binding method of the irregularly shaped display panel 1 are described as follows.

[0082] S110: Provides an irregularly shaped display panel 1, wherein the edge of the irregularly shaped display panel 1 is curved, and the edge of the binding area NS on the side away from the display area AA is a curved edge N1 that matches the curve.

[0083] S120: A first pad group is arranged in the bonding area NS of the irregular display panel 1, so that the multiple first sub-pads 11 in the first pad group are independent of each other, and the multiple first sub-pads 11 extend along the first direction X respectively. Each or more first sub-pads 11 is connected to a signal line 3 of the irregular display panel 1. The multiple first sub-pads 11 are arranged in an arc shape along the arc edge N1 in the bonding area NS. Among the multiple first sub-pads 11 arranged along the second direction Y, at least one first sub-pad 11 located in the middle position extends in the first direction X for a longer length than any other first sub-pad 11 extends in the first direction X.

[0084] S130: Take the circuit board group 2 and bind and connect the circuit board group 2 to the multiple first sub-pads 11 respectively.

[0085] This embodiment sets a bonding area NS according to the edge shape of the circle on the basis of the original circular display panel, so that multiple independent first sub-pads 11 arranged in the bonding area NS are arranged in an arc shape along the edge shape. Each first sub-pad 11 extends along the first direction X, which is beneficial to increase the proportion of the display area AA, while having enough space to arrange the first sub-pads 11 to connect multiple signal lines 3, ensuring the display effect, and is conducive to realizing the narrow bezel of the irregular display panel 1.

[0086] In some embodiments, when providing the irregularly shaped display panel 1, the array substrate of the irregularly shaped display panel 1 can be directly cut into a circle. On this basis, a binding area NS with an arc-shaped edge N1 is pre-set in the annular non-display area NN, and the arc-shaped edge N1 coincides with the edge of the circular array substrate.

[0087] In some embodiments, when the first pad group is arranged in the bonding area NS of the irregular display panel 1, each adjacent one or more first sub-pads 11 is connected to a signal line 3 of the same type on the irregular display panel 1, and the width of the connected signal line 3 in the second direction Y is less than or equal to the sum of the widths of the first sub-pads 11 in the second direction Y, so as to adjust the impedance of the connected signal lines 3 of different types.

[0088] In some embodiments, before bonding the circuit board assembly 2 to the plurality of first sub-pads 11, a plurality of second sub-pads 241 corresponding one-to-one with the plurality of first sub-pads 11 are provided in the connection area 21a of the circuit board assembly 2, and the shapes of the plurality of second sub-pads 241 are the same as the shapes of the corresponding first sub-pads 11. When the circuit board assembly 2 is bonded to the bonding area NS, in the vertical direction Z-direction orthogonal projection of each corresponding first sub-pad 11 onto the circuit board assembly 2, the first sub-pad 11 is located within the second sub-pad 241, and the area of ​​the second sub-pad 241 is greater than or equal to the area of ​​the corresponding first sub-pad 11, so as to ensure the stability and strength of the bonding connection of the circuit board assembly 2.

[0089] It should be noted that the dimensions of layers and regions may be exaggerated in the accompanying drawings of this application for clarity. Furthermore, it is understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be intermediate layers. Additionally, it is understood that when an element or layer is referred to as being "below" another element or layer, it may be directly below the other element, or there may be more than one intermediate layer or element. Furthermore, it is understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Similar reference numerals throughout indicate similar elements.

[0090] Furthermore, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0091] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An irregularly shaped display panel, characterized in that, The irregularly shaped display panel includes a display area and a non-display area surrounding the display area, with a binding area provided in the non-display area located on one side of the display area in a first direction. A first pad group is disposed in the bonding area of ​​the irregularly shaped display panel. The bonding area has an arc-shaped edge at least on the side away from the display area, and the arc-shaped edge coincides with the edge of the opposite non-display area. The first pad group includes a plurality of first sub-pads arranged at intervals along a second direction. The first direction and the second direction intersect. The plurality of first sub-pads extend along the first direction. Each or more first sub-pads are connected to a signal line of the irregularly shaped display panel. The plurality of first sub-pads are arranged in an arc shape along the arc of the arc-shaped edge in the bonding area. Among the plurality of first sub-pads arranged along the second direction, at least one first sub-pad located in the middle position extends in the first direction for a longer length than any other first sub-pad extends in the first direction.

2. The irregularly shaped display panel according to claim 1, characterized in that, Multiple first sub-pads occupy the same area in the bonding region. The first sub-pads are set to an odd number of independent pads. Based on a centerline extending along the first direction and passing through the center of the irregularly shaped display panel, in the second direction, an odd number of first sub-pads located near the centerline (or less than the total number of first sub-pads) extend in the first direction at a length greater than the length of any other first sub-pad in the first direction. Furthermore, the width of the odd number of first sub-pads located near the centerline (or less than the total number of first sub-pads) extending in the second direction is less than the width of any other first sub-pad in the second direction. Alternatively, The first sub-pads are set to an even number of independent sub-pads. With the center line as a reference, the length of an even number of the first sub-pads that are closer to the center line in the second direction and less than the total number of the first sub-pads is greater than the length of any first sub-pad that is closer to the center line in the first direction. The width of an even number of the first sub-pads that are closer to the center line and less than the total number of the first sub-pads in the second direction is less than the width of any first sub-pad that is closer to the center line in the second direction.

3. The irregularly shaped display panel according to claim 2, characterized in that, Along the second direction, in the bonding areas extending from the center line to both sides, the lengths of the plurality of first sub-pads extending in the first direction gradually decrease; and / or, Along the second direction, in the bonding area extending from the center line to both sides in the second direction, the width of the plurality of first sub-pads extending in the second direction gradually decreases.

4. The irregularly shaped display panel according to claim 2, characterized in that, Along the first direction, the minimum distance from the side of each first sub-pad facing the arcuate edge to the arcuate edge is the same; and / or, Along the second direction, the spacing between any two adjacent first sub-pads is the same.

5. The irregularly shaped display panel according to claim 2, characterized in that, The first sub-pad is configured as an elongated strip structure extending along the first direction, and the difference in length between two adjacent first sub-pads extending in the first direction is less than or equal to the gap between them; or, The first sub-pad is configured as a trapezoidal structure extending along the first direction, and the trapezoidal structure has a first width in the second direction on the side facing the arc edge, and a second width in the second direction on the side facing away from the arc edge, wherein the first width is smaller than the second width.

6. The irregularly shaped display panel according to claim 1, characterized in that, The signal lines include multiple lines with different cross-sectional areas, and the width of each signal line in the second direction is not greater than the total width of the one or more first sub-pads connected to it in the second direction.

7. The irregularly shaped display panel according to any one of claims 1-6, characterized in that, Also includes: A circuit board assembly is bonded to the bonding area of ​​the irregularly shaped display panel, and the circuit board assembly has a connection area at one end in the first direction; A second pad group is arranged in the connection area. The second pad group includes a plurality of second sub-pads arranged at intervals along the second direction. When the circuit board group is bonded to the bonding area, the plurality of first sub-pads correspond one-to-one with the plurality of second sub-pads.

8. The irregularly shaped display panel according to claim 7, characterized in that, The shapes of the multiple second sub-pads are the same as the shapes of the corresponding first sub-pads. When the circuit board assembly is bonded to the bonding area, in the vertical projection of each corresponding first sub-pad onto the circuit board assembly, the first sub-pad is located within the second sub-pad, and the area of ​​the second sub-pad is greater than or equal to the area of ​​the corresponding first sub-pad.

9. An irregularly shaped display device, characterized in that, include: The irregularly shaped display panel as described in any one of claims 1-8; A flip-chip film covers at least the bonding area of ​​the irregularly shaped display panel.

10. A method for bonding an irregularly shaped display panel, characterized in that, The bonding method is applied to the bonding of an irregularly shaped display panel as described in any one of claims 1-8, wherein the bonding area of ​​the irregularly shaped display panel is configured to bond a circuit board assembly, and the bonding method includes: An irregularly shaped display panel is provided, wherein the edges of the irregularly shaped display panel are arc-shaped, and the edge of the bonding area on the side away from the display area is an arc-shaped edge that matches the arc shape; A first pad group is arranged in the bonding area of ​​the irregular display panel, such that a plurality of first sub-pads in the first pad group are independent of each other and the plurality of first sub-pads extend along the first direction respectively. Each or more first sub-pads are connected to a signal line of the irregular display panel. The plurality of first sub-pads are arranged in an arc shape along the arc of the arc edge in the bonding area. Among the plurality of first sub-pads arranged along the second direction, at least one first sub-pad located in the middle position extends in the first direction for a longer length than any other first sub-pad extends in the first direction. Take the circuit board assembly and bind it to a plurality of the first sub-pads respectively.

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