Display device

Abstract

The embodiment of the invention discloses a display device. The display device comprises a display panel and a flexible circuit board which are electrically connected. The side, facing the display panel, of the flexible circuit board is provided with at least two rows of third connecting parts distributed in the first direction. At least two rows of fourth connecting parts distributed in the first direction are arranged on the side, facing the flexible circuit board, of the display panel, the fourth connecting parts and the third connecting parts are correspondingly arranged, and the fourth connecting parts are electrically connected with the corresponding third connecting parts; in the first direction, orthographic projections of the opposite sides of the two adjacent rows of third connecting parts on the display panel are at least partially located in orthographic projections of the corresponding fourth connecting parts on the display panel. The fourth connecting part is used for supporting the third connecting part, so that the risk that the third connecting part is sunken and tilted can be effectively reduced, the abnormal pressing impedance between the third connecting part and the fourth connecting part is avoided, and the display quality of the display device is ensured.

Description

Technical Field

[0001] This application relates to the field of displays, and particularly to a display device. Background Art

[0002] At present, in order to ensure the power supply capacity of large and medium-sized OLED display devices, printed circuit boards (PCBs) are mostly used to solder important electronic components onto the circuit boards to process the input signals of the display devices, and then input them into the driving circuit in the display panel through flexible printed circuits (FPCs), so as to realize in-plane signal processing and power supply for the display panel. Among them, the flexible printed circuit board and the printed circuit board are connected by high-temperature lamination. Due to the flexibility of the flexible printed circuit board, during the high-temperature lamination process, the opposite sides of two rows of connecting parts on the flexible printed circuit board will be sunken and warped, resulting in abnormal lamination impedance between the flexible printed circuit board and the printed circuit board, and further affecting the overall display quality of the display device. Summary of the Invention

[0003] Embodiments of this application provide a display device, which can solve the problem that the flexible printed circuit board is prone to sunken warping when connected to the display panel in the existing display device, resulting in abnormal lamination impedance.

[0004] Embodiments of this application provide a display device, including:

[0005] A display panel;

[0006] A flexible printed circuit board, electrically connected to the display panel, and at least two rows of first connecting parts distributed along a first direction are arranged on the flexible printed circuit board;

[0007] A printed circuit board, arranged on the side of the flexible printed circuit board having the first connecting parts, at least two rows of second connecting parts distributed along the first direction are arranged on the side of the printed circuit board facing the flexible printed circuit board, the second connecting parts are arranged corresponding to the first connecting parts, and the second connecting parts are electrically connected to the corresponding first connecting parts;

[0008] Wherein, in the first direction, at least part of the orthographic projection on the printed circuit board of the opposite sides of two adjacent rows of the first connecting parts is located within the orthographic projection on the printed circuit board of the corresponding second connecting parts.

[0009] Optionally, in some embodiments of this application, in the first direction, the distance between two adjacent rows of the first connecting parts is greater than the distance between two adjacent rows of the corresponding second connecting parts.

[0010] Optionally, in some embodiments of the present application, two rows of the first connection portions are provided on the flexible circuit board, and two rows of the second connection portions are provided on the printed circuit board. In the first direction, at least a part of the orthographic projection on the flexible circuit board of the sides of the two rows of the second connection portions facing away from each other is located within the orthographic projection on the flexible circuit board of the corresponding first connection portions.

[0011] Optionally, in some embodiments of the present application, in the first direction, the distance between the opposite sides of two adjacent rows of the first connection portions and the side of the corresponding second connection portion is greater than or equal to 50 micrometers and less than or equal to 120 micrometers.

[0012] Optionally, in some embodiments of the present application, each row of the first connection portions includes a plurality of first connection terminals arranged at intervals in the second direction, each row of the second connection portions includes a plurality of second connection terminals arranged at intervals in the second direction, the second connection terminals are arranged in one-to-one correspondence with the first connection terminals, the second connection terminals are electrically connected to the corresponding first connection terminals, and the second direction forms an angle with the first direction;

[0013] Wherein, in the second direction, at least a part of the orthographic projection on the printed circuit board of the opposite sides of two adjacent first connection terminals is located within the orthographic projection on the printed circuit board of the corresponding second connection terminals.

[0014] Optionally, in some embodiments of the present application, in the second direction, the distance between two adjacent first connection terminals is greater than the distance between the corresponding two adjacent second connection terminals.

[0015] Optionally, in some embodiments of the present application, at least two rows of third connection portions distributed in the first direction are provided on the side of the flexible circuit board facing the display panel, and at least two rows of fourth connection portions distributed in the first direction are provided on the side of the display panel facing the flexible circuit board. The fourth connection portions are arranged in correspondence with the third connection portions, and the fourth connection portions are electrically connected to the corresponding third connection portions;

[0016] Wherein, in the first direction, at least a part of the orthographic projection on the display panel of the opposite sides of two adjacent rows of the third connection portions is located within the orthographic projection on the display panel of the corresponding fourth connection portions.

[0017] Optionally, in some embodiments of the present application, two rows of the third connection portions are provided on the flexible circuit board, and two rows of the fourth connection portions are provided on the display panel. In the first direction, at least a part of the orthographic projection on the flexible circuit board of the sides of the two rows of the fourth connection portions facing away from each other is located within the orthographic projection on the flexible circuit board of the corresponding third connection portions.

[0018] Optionally, in some embodiments of the present application, each row of the third connection portions includes a plurality of third connection terminals arranged at intervals in a second direction, each row of the fourth connection portions includes a plurality of fourth connection terminals arranged at intervals in the second direction, the fourth connection terminals are arranged in one-to-one correspondence with the third connection terminals, the fourth connection terminals are electrically connected to the corresponding third connection terminals, and the second direction forms an angle with the first direction;

[0019] Wherein, in the second direction, at least a part of the projection on the display panel of the opposite sides of two adjacent third connection terminals is located within the projection on the display panel of the corresponding fourth connection terminal.

[0020] Optionally, in some embodiments of the present application, the display device further includes a conductive adhesive layer, the conductive adhesive layer is disposed between the flexible circuit board and the printed circuit board, and between the flexible circuit board and the display panel; the conductive adhesive layer includes a plurality of conductive particles, the first connection portion and the second connection portion are electrically connected through the conductive particles, and the third connection portion and the fourth connection portion are electrically connected through the conductive particles.

[0021] In an embodiment of the present application, the display device includes a display panel and a flexible circuit board, the flexible circuit board is electrically connected to the display panel, and at least two rows of third connection portions distributed in a first direction are disposed on a side of the flexible circuit board facing the display panel; at least two rows of fourth connection portions distributed in the first direction are disposed on a side of the display panel facing the flexible circuit board, the fourth connection portions are disposed corresponding to the third connection portions, and the fourth connection portions are electrically connected to the corresponding third connection portions; in the display device viewed from a top view perspective, in the first direction, at least a part of the projection on the display panel of the opposite sides of two adjacent rows of third connection portions is located within the projection on the display panel of the corresponding fourth connection portion. By disposing at least a part of the projection on the display panel of the opposite sides of two adjacent rows of third connection portions within the projection on the display panel of the corresponding fourth connection portion, the fourth connection portion is used to support the third connection portion, which can effectively reduce the risk of the third connection portion being sunken and warped, thereby avoiding abnormal pressing impedance between the third connection portion and the fourth connection portion and ensuring the display quality of the display device. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0023] Figure 1 is a schematic structural diagram of a display device provided by an embodiment of the present application;

[0024] Figure 2 is a kind of provided by an embodiment of the present application Figure 1 is a cross-sectional view taken along the A-A perspective in;

[0025] Figure 3 is another kind of provided by an embodiment of the present application Figure 1 is a cross-sectional view taken along the A-A perspective in;

[0026] Figure 4 is a schematic structural diagram of the connection between a flexible circuit board and a printed circuit board provided by an embodiment of the present application;

[0027] Figure 5 is a schematic structural diagram of the connection between a flexible circuit board and a display panel provided by an embodiment of the present application.

[0028] Explanation of reference numerals:

[0029] 10, display device;

[0030] 100, display panel; 110, fourth connection part; 111, fourth connection terminal;

[0031] 200, flexible circuit board; 210, first connection part; 211, first connection terminal; 220, third connection part; 221, third connection terminal;

[0032] 300, printed circuit board; 310, second connection part; 311, second connection terminal;

[0033] 400, conductive adhesive layer; 410, conductive particles;

[0034] X, first direction; Y, second direction. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the orientation words such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; and "inner" and "outer" refer to the outline of the device.

[0036] An embodiment of the present application provides a display device, which will be described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments.

[0037] As Figure 1 shown, the display device 10 includes a display panel 100, a flexible circuit board 200, and a printed circuit board 300. The flexible circuit board 200 is electrically connected to the display panel 100, and the printed circuit board 300 is electrically connected to the flexible circuit board 200. That is, the printed circuit board 300 is used to receive a display control signal and process the control signal, and then transmit it to the driving circuit in the display panel 100 through the flexible circuit board 200, so as to realize the processing and power supply of the in-plane signal of the display panel 100.

[0038] Among them, as Figure 4 shown, at least two rows of first connection parts 210 distributed along the first direction X are provided on the flexible circuit board 200. The first connection parts 210 are used to be electrically connected to the printed circuit board 300. A connection line is formed in the flexible circuit board 200, and the first connection parts 210 are electrically connected to the display panel 100 through the connection line in the flexible circuit board 200 to transmit the control signal to the display panel 100.

[0039] The printed circuit board 300 is arranged on the side of the flexible circuit board 200 where the first connection parts 210 are located. At least two rows of second connection parts 310 distributed along the first direction X are provided on the side of the printed circuit board 300 facing the flexible circuit board 200. The second connection parts 310 are correspondingly arranged with the first connection parts 210, and the second connection parts 310 are electrically connected to the corresponding first connection parts 210. That is, after the printed circuit board 300 receives the control signal and processes it, it is transmitted to the first connection parts 210 through the second connection parts 310, and then transmitted to the driving circuit in the display panel 100 through the connection line in the flexible circuit board 200 to drive the display of the display panel 100.

[0040] Among them, as Figure 2and Figure 3 As shown in Figure 3 , in the first direction X, at least a part of the orthographic projection on the printed circuit board 300 of the opposite sides of two adjacent rows of the first connecting portions 210 is located within the orthographic projection on the printed circuit board 300 of the corresponding second connecting portions 310. That is, when the first connecting portions 210 are connected to the second connecting portions 310, at least a part of the opposite sides of two adjacent rows of the first connecting portions 210 can be supported on the second connecting portions 310. Since the first connecting portions 210 are provided on the flexible circuit board 200, when the first connecting portions 210 and the second connecting portions 310 are connected by hot pressing, if the opposite sides of two adjacent rows of the first connecting portions 210 protrude from the corresponding second connecting portions 310, the first connecting portions 210 will be sunken and warped on this side, and the other side of the first connecting portions 210 may be warped in the opposite direction, resulting in uneven contact between the first connecting portions 210 and the second connecting portions 310, and further causing abnormal lamination impedance between the first connecting portions 210 and the second connecting portions 310. In this application, by setting at least a part of the orthographic projection on the printed circuit board 300 of the opposite sides of two adjacent rows of the first connecting portions 210 within the orthographic projection on the printed circuit board 300 of the corresponding second connecting portions 310, and using the second connecting portions 310 to support the first connecting portions 210, the risk of the first connecting portions 210 being sunken and warped can be effectively reduced, thereby avoiding abnormal lamination impedance between the first connecting portions 210 and the second connecting portions 310, and ensuring the display quality of the display device 10.

[0041] In the display device 10 according to the embodiment of this application, it includes a display panel 100, a flexible circuit board 200, and a printed circuit board 300. The flexible circuit board 200 is electrically connected to the display panel 100. At least two rows of first connecting portions 210 distributed along the first direction X are provided on the flexible circuit board 200. The printed circuit board 300 is disposed on the side of the flexible circuit board 200 having the first connecting portions 210. At least two rows of second connecting portions 310 distributed along the first direction X are provided on the side of the printed circuit board 300 facing the flexible circuit board 200. The second connecting portions 310 are correspondingly arranged with the first connecting portions 210, and the second connecting portions 310 are electrically connected to the corresponding first connecting portions 210. In the first direction X, at least a part of the orthographic projection on the printed circuit board 300 of the opposite sides of two adjacent rows of the first connecting portions 210 is located within the orthographic projection on the printed circuit board 300 of the corresponding second connecting portions 310. In this application, by setting at least a part of the orthographic projection on the printed circuit board 300 of the opposite sides of two adjacent rows of the first connecting portions 210 within the orthographic projection on the printed circuit board 300 of the corresponding second connecting portions 310, and using the second connecting portions 310 to support the first connecting portions 210, the risk of the first connecting portions 210 being sunken and warped can be effectively reduced, thereby avoiding abnormal lamination impedance between the first connecting portions 210 and the second connecting portions 310, and ensuring the display quality of the display device 10.

[0042] Optionally, as Figures 2 to 4 shown, in the first direction X, the distance between two adjacent rows of the first connecting portions 210 is greater than the distance between two adjacent rows of the corresponding second connecting portions 310, that is, there is a distance between the opposite sides of two adjacent rows of the first connecting portions 210 and the side edges of the corresponding second connecting portions 310, so as to accommodate the errors generated during the manufacturing and alignment of the first connecting portions 210 and the second connecting portions 310, and the displacement of the second connecting portions 310 caused by the expansion of the printed circuit board 300 in the first direction X during the hot pressing process, thereby further avoiding the depression and warping of the opposite sides of two adjacent rows of the first connecting portions 210 due to protruding beyond the corresponding second connecting portions 310, and further reducing the risk of abnormal pressing impedance between the first connecting portions 210 and the second connecting portions 310.

[0043] In some embodiments, the flexible circuit board 200 is provided with two rows of the first connecting portions 210, and the printed circuit board 300 is provided with two rows of the second connecting portions 310. In the first direction X, the orthographic projections of the opposite sides of the two rows of the second connecting portions 310 on the flexible circuit board 200 are at least partially located within the orthographic projections of the corresponding first connecting portions 210 on the flexible circuit board 200. That is, the opposite sides of the two rows of the first connecting portions 210 at least partially protrude beyond the edges of the corresponding second connecting portions 310 or are flush with the edges of the second connecting portions 310, so as to avoid the depression and warping of the opposite sides of the two rows of the first connecting portions 210 while ensuring that the first connecting portions 210 and the second connecting portions 310 have sufficient connection areas.

[0044] In other embodiments, when the flexible circuit board 200 is provided with multiple rows (more than two rows) of the first connecting portions 210 and the printed circuit board 300 is provided with multiple rows (more than two rows) of the second connecting portions 310, in the first direction X, the orthographic projections of the opposite sides of the two rows of the second connecting portions 310 located at the two side edges on the flexible circuit board 200 are at least partially located within the orthographic projections of the corresponding first connecting portions 210 on the flexible circuit board 200, while the orthographic projections of the opposite sides of the first connecting portions 210 in the middle region in the first direction X on the printed circuit board 300 are located within the orthographic projections of the corresponding second connecting portions 310 on the printed circuit board 300. That is to say, the opposite sides of the first connecting portions 210 located at the two side edges in the first direction X can protrude beyond the corresponding second connecting portions 310, while the sizes of the first connecting portions 210 in the middle region in the first direction X are all smaller than the corresponding second connecting portions 310.

[0045] It should be noted that when thermocompression bonding the first connecting portion 210 and the second connecting portion 310, the pressing range of the indenter is based on the range of the second connecting portion 310 in the first direction X. That is, the pressing range of the indenter is the range formed by the two side edges of multiple rows of the second connecting portion 310 as a whole in the first direction X. In other words, the portions of the first connecting portion 210 protruding from the corresponding second connecting portion 310 at the two side edges in the first direction X will not be subjected to pressure, so no depression and warping will occur. And setting the first connecting portion 210 at the two side edges to protrude from the corresponding second connecting portion 310 can ensure that the first connecting portion 210 and the second connecting portion 310 have a sufficient connection area to effectively improve the connection stability between the first connecting portion 210 and the second connecting portion 310.

[0046] Optionally, in the first direction X, the distance between the opposite sides of two adjacent rows of the first connecting portion 210 and the corresponding side of the second connecting portion 310 is greater than or equal to 50 microns and less than or equal to 120 microns. If this distance is too large, the effective connection area between the first connecting portion 210 and the second connecting portion 310 will be too small, which is not conducive to the connection stability between the first connecting portion 210 and the second connecting portion 310. If this distance is too small, the processing and alignment accuracy requirements for the first connecting portion 210 and the second connecting portion 310 will be relatively high, increasing the production cost.

[0047] In the actual manufacturing process, this distance can be set to 50 microns, 80 microns, 100 microns, or 120 microns, etc. The specific distance value can be selected and adjusted according to the processing alignment accuracy of the first connecting portion 210 and the second connecting portion 310 and the actual connection requirements, and no special restrictions are imposed here.

[0048] Optionally, each row of the first connecting portion 210 includes a plurality of first connection terminals 211 arranged at intervals in the second direction Y, each row of the second connecting portion 310 includes a plurality of second connection terminals 311 arranged at intervals in the second direction Y, the second connection terminals 311 are arranged in one-to-one correspondence with the first connection terminals 211, and the second connection terminals 311 are electrically connected to the corresponding first connection terminals 211. The second direction Y forms an angle with the first direction X. That is, the first connecting portion 210 and the second connecting portion 310 are electrically connected through the corresponding connection of a plurality of first connection terminals 211 and a plurality of second connection terminals 311. The first connection terminals 211 are electrically connected to the display panel 100 through the connection lines in the flexible circuit board 200, and the second connection terminals 311 are electrically connected to the connection lines in the printed circuit board 300. The first direction X and the second direction Y respectively represent the horizontal and vertical directions, that is, the first direction X is perpendicular to the second direction Y.

[0049] Among them, in the second direction Y, the orthographic projection of the opposite side of two adjacent first connection terminals 211 on the printed circuit board 300 is at least partially located within the orthographic projection of the corresponding second connection terminal 311 on the printed circuit board 300, that is, when the first connection terminal 211 is connected to the second connection terminal 311, the opposite side of the two adjacent first connection terminals 211 can be at least partially supported on the second connection terminal 311. Since the size of the first connection terminal 211 in the second direction Y is much smaller than the size in the first direction X, the effect of the first connection terminal 211 possibly being sunken and lifted in the second direction Y can be ignored, but in the embodiment of the present application, the arrangement of the first connection terminal 211 and the second connection terminal 311 in the second direction Y is consistent with that in the first direction X, which can minimize the risk of the first connection terminal 211 being sunken and lifted, and further minimize the risk of abnormal press-fit impedance between the first connection terminal 211 and the second connection terminal 311.

[0050] In some embodiments, in the second direction Y, the spacing between two adjacent first connection terminals 211 is greater than the spacing between the corresponding two adjacent second connection terminals 311, that is, there is a spacing between the opposite sides of the two adjacent first connection terminals 211 and the side of the corresponding second connection terminal 311, so as to accommodate the errors generated during the production and alignment of the first connection terminals 211 and the second connection terminals 311, as well as the displacement of the second connection terminals 311 caused by the expansion of the printed circuit board 300 in the second direction Y during the hot pressing process, thereby ensuring the effective and stable connection between the first connection terminals 211 and the second connection terminals 311.

[0051] Optional, such as Figure 5 As shown, at least two rows of third connection parts 220 distributed along the first direction X are provided on one side of the flexible circuit board 200 facing the display panel 100, and at least two rows of fourth connection parts 110 distributed along the first direction X are provided on one side of the display panel 100 facing the flexible circuit board 200. The fourth connection parts 110 are arranged corresponding to the third connection parts 220, and the fourth connection parts 110 are electrically connected to the corresponding third connection parts 220, that is, after the printed circuit board 300 receives and processes the control signal, it is transmitted to the first connection part 210 of the flexible circuit board 200 through the second connection part 310, the first connection part 210 is electrically connected to the third connection part 220 through the connection wiring in the flexible circuit board 200, and then transmitted to the fourth connection part 110 of the display panel 100 through the third connection part 220 of the flexible circuit board 200, and the fourth connection part 110 is electrically connected to the driving circuit in the display panel 100, and the driving circuit drives the display panel 100 to display after receiving the control signal.

[0052] Among them, in the first direction X, the positive projection on the display panel 100 of the opposite sides of two adjacent rows of the third connecting portions 220 is at least partially located within the positive projection on the display panel 100 of the corresponding fourth connecting portion 110. That is, when the third connecting portion 220 is connected to the fourth connecting portion 110, at least a part of the opposite sides of two adjacent rows of the third connecting portions 220 can be supported on the fourth connecting portion 110. Since the third connecting portion 220 is provided on the flexible circuit board 200, when the third connecting portion 220 and the fourth connecting portion 110 are connected by thermocompression, if the opposite sides of two adjacent rows of the third connecting portions 220 protrude from the corresponding fourth connecting portion 110, the third connecting portion 220 will be sunken and warped on this side, and the other side of the third connecting portion 220 may be warped in the opposite direction, resulting in uneven contact between the third connecting portion 220 and the fourth connecting portion 110, and further causing abnormal lamination impedance between the third connecting portion 220 and the fourth connecting portion 110. In this application, by setting at least a part of the positive projection on the display panel 100 of the opposite sides of two adjacent rows of the third connecting portions 220 within the positive projection on the display panel 100 of the corresponding fourth connecting portion 110, and using the fourth connecting portion 110 to support the third connecting portion 220, the risk of the third connecting portion 220 being sunken and warped can be effectively reduced, thereby avoiding abnormal lamination impedance between the third connecting portion 220 and the fourth connecting portion 110 and ensuring the display quality of the display device 10.

[0053] In some embodiments, the flexible circuit board 200 is provided with two rows of the third connecting portions 220, and the display panel 100 is provided with two rows of the fourth connecting portions 110. In the first direction X, the positive projection on the flexible circuit board 200 of the opposite sides of the two rows of the fourth connecting portions 110 is at least partially located within the positive projection on the flexible circuit board 200 of the corresponding third connecting portion 220. That is, at least a part of the opposite sides of the two rows of the third connecting portions 220 protrude from the edge of the corresponding fourth connecting portion 110 or are flush with the edge of the fourth connecting portion 110, so as to ensure that there is sufficient connection area between the third connecting portion 220 and the fourth connecting portion 110 while avoiding sunken warping on the opposite sides of the two rows of the third connecting portions 220.

[0054] In some other embodiments, when the flexible circuit board 200 is provided with multiple rows (more than two rows) of third connection portions 220 and the display panel 100 is provided with multiple rows (more than two rows) of fourth connection portions 110, in the first direction X, on the opposite sides of the two rows of fourth connection portions 110 located at the two side edges respectively, the orthographic projection on the flexible circuit board 200 is at least partially located within the orthographic projection of the corresponding third connection portions 220 on the flexible circuit board 200, while the orthographic projections on the display panel 100 of the opposite sides in the first direction X of the third connection portions 220 located in the middle region are located within the orthographic projection of the corresponding fourth connection portions 110 on the display panel 100. That is to say, on the opposite sides of the third connection portions 220 located at the two side edges in the first direction X, they can protrude beyond the corresponding fourth connection portions 110, while the sizes of the third connection portions 220 located in the middle region in the first direction X are all smaller than the corresponding fourth connection portions 110.

[0055] It should be noted that when thermally pressing and connecting the third connection portions 220 and the fourth connection portions 110, the pressing range of the pressing head is based on the range of the fourth connection portions 110 in the first direction X, that is, the pressing range of the pressing head is the range formed by the two side edges of the multiple rows of fourth connection portions 110 as a whole in the first direction X. That is to say, the portions of the third connection portions 220 located at the two side edges and protruding beyond the corresponding fourth connection portions 110 in the first direction X will not be under pressure, so no depression and warping will occur. And setting the third connection portions 220 located at the two side edges to protrude beyond the corresponding fourth connection portions 110 can ensure that the third connection portions 220 and the fourth connection portions 110 have a sufficient connection area to effectively improve the connection stability between the third connection portions 220 and the fourth connection portions 110.

[0056] Optionally, each row of third connection portions 220 includes multiple third connection terminals 221 arranged at intervals in the second direction Y, each row of fourth connection portions 110 includes multiple fourth connection terminals 111 arranged at intervals in the second direction Y, the fourth connection terminals 111 and the third connection terminals 221 are arranged in one-to-one correspondence, the fourth connection terminals 111 are electrically connected to the corresponding third connection terminals 221, and the second direction Y forms an angle with the first direction X. That is, the third connection portions 220 and the fourth connection portions 110 are electrically connected through the corresponding connection of multiple third connection terminals 221 and multiple fourth connection terminals 111. The third connection terminals 221 are electrically connected to the first connection terminals 211 through the connection lines in the flexible circuit board 200, so as to be electrically connected to the printed circuit board 300, and the fourth connection terminals 111 are electrically connected to the driving circuit in the display panel 100. The first direction X and the second direction Y respectively represent the horizontal and vertical directions, that is, the first direction X is perpendicular to the second direction Y.

[0057] Among them, in the second direction Y, the orthographic projection on the display panel 100 of the opposite sides of two adjacent third connection terminals 221 is at least partially located within the orthographic projection on the display panel 100 of the corresponding fourth connection terminal 111. That is, when the third connection terminal 221 is connected to the fourth connection terminal 111, the opposite sides of two adjacent third connection terminals 221 can at least partially support on the fourth connection terminal 111. Since the size of the third connection terminal 221 in the second direction Y is much smaller than that in the first direction X, the influence of its possible depression and warping in the second direction Y can be ignored. However, in the embodiments of the present application, the setting manner of the third connection terminal 221 and the fourth connection terminal 111 in the second direction Y is kept consistent with that in the first direction X, which can minimize the risk of the third connection terminal 221 being depressed and warped, and further minimize the risk of abnormal pressing impedance between the third connection terminal 221 and the fourth connection terminal 111.

[0058] In some embodiments, in the second direction Y, the distance between two adjacent third connection terminals 221 is greater than the distance between the corresponding two adjacent fourth connection terminals 111. That is, there is a distance between the opposite sides of two adjacent third connection terminals 221 and the side edges of the corresponding fourth connection terminal 111, so as to be compatible with the errors generated during the manufacturing and alignment of the third connection terminal 221 and the fourth connection terminal 111, thereby ensuring the effective and stable connection between the third connection terminal 221 and the fourth connection terminal 111.

[0059] Optionally, as Figure 2 and Figure 3 shown, the display device 10 further includes a conductive adhesive layer 400. The conductive adhesive layer 400 is disposed between the flexible circuit board 200 and the printed circuit board 300, and between the flexible circuit board 200 and the display panel 100. The conductive adhesive layer 400 includes a plurality of conductive particles 410. The first connection portion 210 and the second connection portion 310 are electrically connected through the conductive particles 410, and the third connection portion 220 and the fourth connection portion 110 are electrically connected through the conductive particles 410. That is, the conductive adhesive layer 400 can not only play a role in bonding and fixing, but also play a role in electrical connection. When connecting the flexible circuit board 200 to the display panel 100 and the flexible circuit board 200 to the printed circuit board 300, the conductive adhesive layer 400 is made to have a certain fluidity by means of hot pressing, and the conductive particles 410 between the first connection portion 210 and the second connection portion 310 and between the third connection portion 220 and the fourth connection portion 110 are broken under the action of pressure, so that the first connection portion 210 and the second connection portion 310 and the third connection portion 220 and the fourth connection portion 110 are electrically connected, thereby realizing the electrical connection among the display panel 100, the flexible circuit board 200, and the printed circuit board 300.

[0060] It should be noted that the distance between the opposite sides of two adjacent rows of the first connecting portions 210 and the corresponding sides of the second connecting portions 310, and the distance between the opposite sides of two adjacent rows of the third connecting portions 220 and the corresponding sides of the fourth connecting portions 110 can be selected and adjusted not only according to their respective processing alignment accuracies, but also according to the number of the conductive particles 410 corresponding to the actual connection requirements, so as to ensure the connection stability between the first connecting portions 210 and the second connecting portions 310 and between the third connecting portions 220 and the fourth connecting portions 110.

[0061] The above has introduced in detail a display device provided by an embodiment of the present application. Specific examples are used herein to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A display device, characterized in that, comprising: a display panel; a flexible circuit board electrically connected to the display panel, on one side of the flexible circuit board facing the display panel, at least two rows of third connection portions distributed along a first direction are provided; wherein, on one side of the display panel facing the flexible circuit board, at least two rows of fourth connection portions distributed along the first direction are provided, the fourth connection portions are arranged corresponding to the third connection portions, and the fourth connection portions are electrically connected to the corresponding third connection portions; in the display device viewed from a top-down perspective, in the first direction, at least a part of the projection on the display panel of the opposite sides of two adjacent rows of the third connection portions is located within the projection on the display panel of the corresponding fourth connection portions, and the opposite sides of the first row and the last row of the third connection portions protrude beyond the corresponding fourth connection portions.

2. The display device according to claim 1, characterized in that, the flexible circuit board is provided with two rows of the third connection portions, and the display panel is provided with two rows of the fourth connection portions.

3. The display device according to claim 1, characterized in that, the flexible circuit board is provided with more than two rows of the third connection portions, and the display panel is provided with more than two rows of the fourth connection portions; in the display device viewed from a top-down perspective, the projections on the display panel of the opposite sides in the first direction of the third connection portions located in the middle area are located within the projections on the display panel of the corresponding fourth connection portions.

4. The display device according to any one of claims 1 to 3, characterized in that, each row of the third connection portions includes a plurality of third connection terminals spaced along a second direction, each row of the fourth connection portions includes a plurality of fourth connection terminals spaced along the second direction, the fourth connection terminals are arranged corresponding to the third connection terminals one by one, the fourth connection terminals are electrically connected to the corresponding third connection terminals, and the second direction forms an angle with the first direction; wherein, in the second direction, at least a part of the projection on the display panel of the opposite sides of two adjacent third connection terminals is located within the projection on the display panel of the corresponding fourth connection terminals.

5. The display device according to claim 1, characterized in that, at least two rows of first connection portions distributed along the first direction are provided on the flexible circuit board; the display device includes a printed circuit board, the printed circuit board is arranged on the side of the flexible circuit board having the first connection portions, on one side of the printed circuit board facing the flexible circuit board, at least two rows of second connection portions distributed along the first direction are provided, the second connection portions are arranged corresponding to the first connection portions, and the second connection portions are electrically connected to the corresponding first connection portions; wherein, in the first direction, at least a part of the projection on the printed circuit board of the opposite sides of two adjacent rows of the first connection portions is located within the projection on the printed circuit board of the corresponding second connection portions.

6. The display device according to claim 5, characterized in that, In the first direction, the distance between two adjacent rows of the first connection parts is greater than the distance between two corresponding adjacent rows of the second connection parts.

7. The display device according to claim 5, wherein, the flexible circuit board is provided with two rows of the first connection parts, the printed circuit board is provided with two rows of the second connection parts, in the first direction, at least a part of the orthographic projection on the flexible circuit board of one side of the two rows of the second connection parts facing away from each other is located within the orthographic projection on the flexible circuit board of the corresponding first connection parts.

8. The display device according to any one of claims 5 to 7, wherein, in the first direction, the distance between one side of two adjacent rows of the first connection parts facing each other and one side of the corresponding second connection parts is greater than or equal to 50 micrometers and less than or equal to 120 micrometers.

9. The display device according to any one of claims 5 to 7, wherein, each row of the first connection parts includes a plurality of first connection terminals arranged at intervals in the second direction, each row of the second connection parts includes a plurality of second connection terminals arranged at intervals in the second direction, the second connection terminals are arranged in one-to-one correspondence with the first connection terminals, the second connection terminals are electrically connected to the corresponding first connection terminals, and the second direction forms an angle with the first direction; wherein, in the second direction, at least a part of the orthographic projection on the printed circuit board of one side of two adjacent first connection terminals facing each other is located within the orthographic projection on the printed circuit board of the corresponding second connection terminals.

10. The display device according to claim 9, wherein, in the second direction, the distance between two adjacent first connection terminals is greater than the distance between two corresponding adjacent second connection terminals.

11. The display device according to claim 5, wherein, the display device further includes a conductive adhesive layer, the conductive adhesive layer is disposed between the flexible circuit board and the printed circuit board, and between the flexible circuit board and the display panel; the conductive adhesive layer includes a plurality of conductive particles, the first connection parts and the second connection parts are electrically connected through the conductive particles, and the third connection parts and the fourth connection parts are electrically connected through the conductive particles.

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