Display device

Abstract

Disclosed is a display device, comprising a display panel, a flexible printed circuit and a printed circuit board, which are electrically connected to each other, wherein the flexible printed circuit is provided with at least two rows of first connecting portions distributed in a first direction, and the printed circuit board is provided with at least two rows of second connecting portions which are distributed in the first direction and are arranged corresponding to the first connecting portions and electrically connected thereto, the orthographic projections of the opposite sides of two adjacent rows of first connecting portions on the printed circuit board being at least partially located in the orthographic projections of the corresponding second connecting portions on the printed circuit board.

Description

Display device

[0001] This application claims priority to Chinese patent application No. 202311532585.7 filed on November 15, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of display, and in particular to a display device. Background Art

[0003] To ensure power supply, medium and large-sized organic light-emitting diode (OLED) displays often utilize a printed circuit board (PCB) to solder key electronic components onto the PCB. This process processes the display's input signals, which are then fed through a flexible printed circuit (FPC) to the display panel's driver circuitry, enabling in-plane signal processing and power supply. The FPC and PCB are connected via high-temperature lamination. Due to the FPC's flexibility, the two rows of connections on the FPC can sag and warp on opposite sides during the lamination process, leading to abnormal lamination impedance between the FPC and PCB, which can affect the overall display quality of the display. SUMMARY OF THE INVENTION

[0004] The present application provides a display device that can solve the problem in existing display devices that a flexible circuit board is prone to depression and warping when connected to a printed circuit board, resulting in abnormal press-fit impedance.

[0005] The present application provides a display device, comprising:

[0006] Display panel;

[0007] a flexible circuit board electrically connected to the display panel, wherein the flexible circuit board is provided with at least two rows of first connection portions distributed along a first direction;

[0008] a printed circuit board disposed on a side of the flexible circuit board having the first connecting portion, wherein at least two rows of second connecting portions distributed along the first direction are disposed on a side of the printed circuit board facing the flexible circuit board, the second connecting portions being disposed corresponding to the first connecting portions and electrically connected to the corresponding first connecting portions;

[0009] Wherein, in the first direction, orthographic projections of opposite sides of two adjacent rows of the first connecting portions on the printed circuit board are at least partially located within orthographic projections of corresponding second connecting portions on the printed circuit board. Beneficial effects

[0010] Compared to the prior art, in an embodiment of the present application, a display device includes a display panel, a flexible circuit board, and a printed circuit board. The flexible circuit board is electrically connected to the display panel. The flexible circuit board is provided with at least two rows of first connecting portions distributed along a first direction. The printed circuit board is provided on a side of the flexible circuit board having the first connecting portions. The side of the printed circuit board facing the flexible circuit board is provided with at least two rows of second connecting portions distributed along the first direction. The second connecting portions are provided corresponding to the first connecting portions and are electrically connected to the corresponding first connecting portions. In the first direction, the orthographic projections of the opposing sides of two adjacent rows of first connecting portions on the printed circuit board are at least partially located within the orthographic projections of the corresponding second connecting portions on the printed circuit board. By disposing the orthographic projections of the opposing sides of two adjacent rows of first connecting portions on the printed circuit board within the orthographic projections of the corresponding second connecting portions on the printed circuit board, and by using the second connecting portions to support the first connecting portions, the risk of the first connecting portions being sunken or warped is effectively reduced, thereby avoiding abnormal press-fit impedance between the first and second connecting portions and ensuring the display quality of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] FIG1 is a schematic structural diagram of a display device provided in an embodiment of the present application.

[0012] FIG. 2 is a cross-sectional view of the display device shown in FIG. 1 taken along the line AA′.

[0013] FIG. 3 is a cross-sectional view of the display device shown in FIG. 1 taken along another AA′ viewing angle.

[0014] FIG4 is a schematic diagram of the structure of the connection between the flexible circuit board and the printed circuit board in a display device provided by an embodiment of the present application.

[0015] FIG5 is a schematic diagram of the structure of the connection between the flexible circuit board and the display panel in a display device provided by an embodiment of the present application.

[0016] Description of reference numerals:

[0017] 10. Display device;

[0018] 100, display panel; 110, fourth connection portion; 111, fourth connection terminal;

[0019] 200, flexible printed circuit board; 210, first connecting portion; 211, first connecting terminal; 220, third connecting portion; 221, third connecting terminal;

[0020] 300, printed circuit board; 310, second connecting portion; 311, second connecting terminal;

[0021] 400, conductive adhesive layer; 410, conductive particles;

[0022] X, first direction; Y, second direction. Modes for Carrying Out the Invention

[0023] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0024] It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application and are not intended to limit the present application.

[0025] In this application, unless otherwise specified, directional words such as "upper" and "lower" generally refer to the upper and lower parts of the device in actual use or working state, specifically the direction of the drawings in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0026] The order in which the following embodiments are described is not intended to limit the preferred order of the embodiments.

[0027] An embodiment of the present application provides a display device. As shown in FIG1 , 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 and process display control signals, and then transmit the control signals to the driving circuit in the display panel 100 through the flexible circuit board 200, thereby realizing signal processing and power supply within the display panel 100.

[0028] As shown in Figures 2 and 4, the flexible circuit board 200 is provided with at least two rows of first connection portions 210 distributed along the first direction X. The first connection portions 210 are used to electrically connect to the printed circuit board 300. A connection circuit is formed in the flexible circuit board 200, and the first connection portions 210 are electrically connected to the display panel 100 through the connection circuit in the flexible circuit board 200 to transmit control signals to the display panel 100.

[0029] As shown in Figures 2 and 4, the printed circuit board 300 is arranged on a side of the flexible circuit board 200 having the first connection portion 210. The side of the printed circuit board 300 facing the flexible circuit board 200 is provided with at least two rows of second connection portions 310 distributed along the first direction X. The second connection portions 310 are arranged corresponding to the first connection portions 210. The second connection portions 310 are electrically connected to the corresponding first connection portions 210. That is, after the printed circuit board 300 receives and processes the control signal, it is transmitted to the first connection portion 210 through the second connection portion 310, and then transmitted to the driving circuit in the display panel 100 through the connection line within the flexible circuit board 200 to drive the display of the display panel 100.

[0030] As shown in Figures 2 and 3 , in the first direction X, the orthographic projections of the opposing sides of two adjacent rows of first connecting portions 210 on the printed circuit board 300 are at least partially located within the orthographic projections of the corresponding second connecting portions 310 on the printed circuit board 300. That is, when the first connecting portions 210 and the second connecting portions 310 are connected, the opposing sides of the two adjacent rows of first connecting portions 210 are at least partially supported on the second connecting portions 310. Because the first connecting portions 210 are disposed on the flexible printed circuit board 200, if the opposing sides of the two adjacent rows of first connecting portions 210 protrude beyond the corresponding second connecting portions 310 during hot pressing, the first connecting portions 210 may be sunken and warped on that side, while the other sides of the first connecting portions 210 may warp in the opposite direction. This results in uneven contact between the first connecting portions 210 and the second connecting portions 310, and in turn, abnormal press-fit impedance between the first connecting portions 210 and the second connecting portions 310. In the present application, by disposing the orthographic projections of the opposite sides of two adjacent rows of first connecting portions 210 on the printed circuit board 300 at least partially within the orthographic projections of the corresponding second connecting portions 310 on the printed circuit board 300, the second connecting portions 310 are used to support the first connecting portions 210. This effectively reduces the risk of the first connecting portions 210 being sunken or warped, thereby avoiding abnormal press-fit impedance between the first connecting portions 210 and the second connecting portions 310, thereby ensuring the display quality of the display device 10.

[0031] In an embodiment of the present application, a 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. The flexible circuit board 200 is provided with at least two rows of first connecting portions 210 distributed along a first direction X. The printed circuit board 300 is disposed on a side of the flexible circuit board 200 having the first connecting portions 210. A side of the printed circuit board 300 facing the flexible circuit board 200 is provided with at least two rows of second connecting portions 310 distributed along the first direction X. The second connecting portions 310 are disposed corresponding to the first connecting portions 210 and are electrically connected to the corresponding first connecting portions 210. In the first direction X, the orthographic projections of opposing sides of two adjacent rows of first connecting portions 210 on the printed circuit board 300 are at least partially located within the orthographic projections of the corresponding second connecting portions 310 on the printed circuit board 300. In the present application, by disposing the orthographic projections of the opposite sides of two adjacent rows of first connecting portions 210 on the printed circuit board 300 at least partially within the orthographic projections of the corresponding second connecting portions 310 on the printed circuit board 300, the second connecting portions 310 are used to support the first connecting portions 210. This effectively reduces the risk of the first connecting portions 210 being sunken or warped, thereby avoiding abnormal press-fit impedance between the first connecting portions 210 and the second connecting portions 310, thereby ensuring the display quality of the display device 10.

[0032] Optionally, as shown in Figures 2 to 4, in the first direction X, the spacing between two adjacent rows of first connection parts 210 is greater than the spacing between the corresponding two adjacent rows of second connection parts 310, that is, there is a spacing between the opposite sides of the two adjacent rows of first connection parts 210 and the side of the corresponding second connection part 310, so as to accommodate the errors generated during the production and alignment of the first connection parts 210 and the second connection parts 310, as well as the displacement of the second connection parts 310 due to the expansion of the printed circuit board 300 in the first direction X during the hot pressing process, thereby further avoiding the opposite side of the two adjacent rows of first connection parts 210 from protruding from the corresponding second connection part 310 and causing depression and warping, thereby reducing the risk of abnormal pressing impedance between the first connection parts 210 and the second connection parts 310.

[0033] In some embodiments, the flexible circuit board 200 is provided with two rows of first connection portions 210, and the printed circuit board 300 is provided with two rows of second connection portions 310. In the first direction X, the orthographic projections of the opposing sides of the two rows of second connection portions 310 on the flexible circuit board 200 are at least partially located within the orthographic projections of the corresponding first connection portions 210 on the flexible circuit board 200. In other words, the opposing sides of the two rows of first connection portions 210 at least partially protrude from or are flush with the edges of the corresponding second connection portions 310. This ensures that the first connection portions 210 and the second connection portions 310 have sufficient connection area while preventing the opposing sides of the two rows of first connection portions 210 from being sunken or warped.

[0034] In other embodiments, when the flexible circuit board 200 is provided with multiple (greater than two) rows of first connection portions 210 and the printed circuit board 300 is provided with multiple (greater than two) rows of second connection portions 310, in the first direction X, the orthographic projections of the opposite sides of the two rows of second connection 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 connection portions 210 on the flexible circuit board 200, while the orthographic projections of the first connection portions 210 located in the middle region on the opposite sides in the first direction X on the printed circuit board 300 are located within the orthographic projections of the corresponding second connection portions 310 on the printed circuit board 300. In other words, the opposite sides of the first connection portions 210 located at the two side edges in the first direction X can protrude beyond the corresponding second connection portions 310, while the first connection portions 210 located in the middle region are smaller in the first direction X than the corresponding second connection portions 310.

[0035] It should be noted that when the first connection part 210 and the second connection part 310 are hot-pressed together, the pressure range of the pressure head is based on the range of the second connection part 310 in the first direction X, that is, the pressure range of the pressure head is the range formed by the two side edges of the multiple rows of second connection parts 310 as a whole in the first direction X. In other words, the parts of the first connection parts 210 located on the two side edges in the first direction X that protrude from the corresponding second connection parts 310 will not be subjected to pressure, so no depression or warping will occur. By setting the first connection parts 210 located on the two side edges to protrude from the corresponding second connection parts 310, it is possible to ensure that the first connection parts 210 and the second connection parts 310 have sufficient connection area, thereby effectively improving the connection stability between the first connection parts 210 and the second connection parts 310.

[0036] Optionally, in the first direction X, the distance between the opposite sides of two adjacent rows of first connecting portions 210 and the corresponding sides of the second connecting portions 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 portions 210 and the second connecting portions 310 is too small, which is detrimental to the connection stability between the first connecting portions 210 and the second connecting portions 310. If this distance is too small, the machining and alignment accuracy requirements for the first connecting portions 210 and the second connecting portions 310 are high, increasing production costs.

[0037] During the actual production process, the spacing can be set to 50 microns, 80 microns, 100 microns or 120 microns, etc. The specific spacing value can be selected and adjusted according to the processing alignment accuracy of the first connecting part 210 and the second connecting part 310 and the actual connection requirements. There is no special restriction here.

[0038] Optionally, each row of first connecting portions 210 includes a plurality of first connecting terminals 211 spaced apart along a second direction Y, and each row of second connecting portions 310 includes a plurality of second connecting terminals 311 spaced apart along the second direction Y. The second connecting terminals 311 are disposed in a one-to-one correspondence with the first connecting terminals 211 and are electrically connected to the corresponding first connecting terminals 211. The second direction Y forms an angle with the first direction X. That is, the first connecting portions 210 and the second connecting portions 310 are electrically connected through the corresponding connections between the plurality of first connecting terminals 211 and the plurality of second connecting terminals 311. The first connecting terminals 211 are electrically connected to the display panel 100 via connection traces within the flexible printed circuit board 200, and the second connecting terminals 311 are electrically connected to connection traces within the printed circuit board 300. The first direction X and the second direction Y represent the horizontal and vertical directions, respectively, that is, the first direction X is perpendicular to the second direction Y.

[0039] In the second direction Y, the orthographic projections of the opposing sides of two adjacent first connection terminals 211 on the printed circuit board 300 are at least partially located within the orthographic projections of the corresponding second connection terminals 311 on the printed circuit board 300. That is, when the first connection terminal 211 is connected to the second connection terminal 311, the opposing sides of the two adjacent first connection terminals 211 can be at least partially supported on the second connection terminal 311. Because the dimensions of the first connection terminals 211 in the second direction Y are much smaller than those in the first direction X, the effects of their potential concavity or warping in the second direction Y are negligible. However, in the embodiments of the present application, the arrangement of the first and second connection terminals 211 in the second direction Y is consistent with that in the first direction X, thereby minimizing the risk of concavity or warping of the first connection terminals 211, and thereby minimizing the risk of abnormal press-fit impedance between the first and second connection terminals 211, 311.

[0040] In some embodiments, in the second direction Y, the spacing between two adjacent first connection terminals 211 is greater than the spacing between two corresponding 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 an effective and stable connection between the first connection terminals 211 and the second connection terminals 311.

[0041] Optionally, as shown in FIG5 , at least two rows of third connection portions 220 distributed along the first direction X are provided on the side of the flexible circuit board 200 facing the display panel 100, and at least two rows of fourth connection portions 110 distributed along the first direction X are provided on the side of the display panel 100 facing the flexible circuit board 200. The fourth connection portions 110 are provided corresponding to the third connection portions 220, and the fourth connection portions 110 are electrically connected to the corresponding third connection portions 220. That is, after the printed circuit board 300 receives and processes the control signal, it is transmitted to the first connection portion 210 of the flexible circuit board 200 through the second connection portion 310. The first connection portion 210 is electrically connected to the third connection portion 220 through the connecting trace in the flexible circuit board 200, and then transmitted to the fourth connection portion 110 of the display panel 100 through the third connection portion 220 of the flexible circuit board 200. The fourth connection portion 110 is electrically connected to the driving circuit in the display panel 100. After receiving the control signal, the driving circuit drives the display panel 100 to display.

[0042] In the first direction X, the orthographic projections of the opposing sides of two adjacent rows of third connecting portions 220 on the display panel 100 are at least partially located within the orthographic projections of the corresponding fourth connecting portions 110 on the display panel 100. That is, when the third connecting portions 220 are connected to the fourth connecting portions 110, the opposing sides of the two adjacent rows of third connecting portions 220 are at least partially supported on the fourth connecting portions 110. Because the third connecting portions 220 are disposed on the flexible printed circuit board 200, when the third connecting portions 220 and the fourth connecting portions 110 are connected by hot pressing, if the opposing sides of the two adjacent rows of third connecting portions 220 protrude beyond the corresponding fourth connecting portions 110, the third connecting portions 220 may be sunken and warped on that side, while the other sides of the third connecting portions 220 may warp in the opposite direction. This results in uneven contact between the third connecting portions 220 and the fourth connecting portions 110, and in turn, abnormal press-fit impedance between the third connecting portions 220 and the fourth connecting portions 110. In the present application, the orthographic projections of the opposite sides of two adjacent rows of third connection portions 220 on the display panel 100 are at least partially disposed within the orthographic projections of the corresponding fourth connection portions 110 on the display panel 100. The fourth connection portions 110 are used to support the third connection portions 220, thereby effectively reducing the risk of the third connection portions 220 being sunken or warped, thereby avoiding abnormal pressing impedance between the third connection portions 220 and the fourth connection portions 110, and ensuring the display quality of the display device 10.

[0043] In some embodiments, the flexible circuit board 200 is provided with two rows of third connection portions 220, and the display panel 100 is provided with two rows of fourth connection portions 110. In the first direction X, the orthographic projections of the opposing sides of the two rows of fourth connection portions 110 on the flexible circuit board 200 are at least partially located within the orthographic projections of the corresponding third connection portions 220 on the flexible circuit board 200. That is, the opposing sides of the two rows of third connection portions 220 at least partially protrude from or are flush with the edges of the corresponding fourth connection portions 110. This prevents the opposing sides of the two rows of third connection portions 220 from being sunken or warped, while ensuring that the third connection portions 220 and the fourth connection portions 110 have sufficient connection area.

[0044] In other embodiments, when the flexible circuit board 200 is provided with multiple (greater than two) rows of third connection portions 220 and the display panel 100 is provided with multiple (greater than two) rows of fourth connection portions 110, in the first direction X, the orthographic projections of the opposite sides of the two rows of fourth connection portions 110 located at the two side edges on the flexible circuit board 200 are at least partially located within the orthographic projections of the corresponding third connection portions 220 on the flexible circuit board 200, while the orthographic projections of the third connection portions 220 located in the middle region on the display panel 100 on opposite sides in the first direction X are located within the orthographic projections of the corresponding fourth connection portions 110 on the display panel 100. In other words, the opposite sides of the third connection portions 220 located at the two side edges in the first direction X can protrude beyond the corresponding fourth connection portions 110, while the third connection portions 220 located in the middle region are smaller in the first direction X than the corresponding fourth connection portions 110.

[0045] It should be noted that when the third connection part 220 and the fourth connection part 110 are hot-pressed together, the pressure range of the pressure head is based on the range of the fourth connection part 110 in the first direction X, that is, the pressure range of the pressure head is the range formed by the two side edges of the multiple rows of fourth connection parts 110 as a whole in the first direction X. In other words, the parts of the third connection parts 220 located on the two side edges in the first direction X that protrude from the corresponding fourth connection parts 110 will not be subjected to pressure, so no depression or warping will occur. By setting the third connection parts 220 located on the two side edges to protrude from the corresponding fourth connection parts 110, it is possible to ensure that the third connection parts 220 and the fourth connection parts 110 have sufficient connection area, thereby effectively improving the connection stability between the third connection parts 220 and the fourth connection parts 110.

[0046] Optionally, each row of the third connecting portions 220 includes a plurality of third connecting terminals 221 spaced apart along the second direction Y, and each row of the fourth connecting portions 110 includes a plurality of fourth connecting terminals 111 spaced apart along the second direction Y. The fourth connecting terminals 111 are disposed in a one-to-one correspondence with the third connecting terminals 221, and are electrically connected to the corresponding third connecting terminals 221. The second direction Y forms an angle with the first direction X. That is, the third connecting portions 220 and the fourth connecting portions 110 are electrically connected through the corresponding connections between the plurality of third connecting terminals 221 and the plurality of fourth connecting terminals 111. The third connecting terminals 221 are electrically connected to the first connecting terminals 211 via connection lines within the flexible printed circuit board 200, thereby being electrically connected to the printed circuit board 300. The fourth connecting terminals 111 are electrically connected to the driving circuit within the display panel 100. The first direction X and the second direction Y represent the horizontal and vertical directions, respectively, i.e., the first direction X is perpendicular to the second direction Y.

[0047] In the second direction Y, the orthographic projections of the opposing sides of two adjacent third connection terminals 221 on the display panel 100 are at least partially located within the orthographic projections of the corresponding fourth connection terminals 111 on the display panel 100. That is, when the third connection terminals 221 and the fourth connection terminals 111 are connected, the opposing sides of the two adjacent third connection terminals 221 can be at least partially supported on the fourth connection terminals 111. Because the dimensions of the third connection terminals 221 in the second direction Y are much smaller than those in the first direction X, the effects of their potential concavity or warping in the second direction Y are negligible. However, in the embodiments of the present application, the arrangement of the third and fourth connection terminals 221 and 111 in the second direction Y is consistent with that in the first direction X, thereby minimizing the risk of concavity or warping of the third connection terminals 221, and thereby minimizing the risk of abnormal press-fit impedance between the third and fourth connection terminals 221 and 111.

[0048] In some embodiments, in the second direction Y, the spacing between two adjacent third connection terminals 221 is greater than the spacing between the corresponding two adjacent fourth connection terminals 111, that is, there is a spacing between the opposite sides of the two adjacent third connection terminals 221 and the side of the corresponding fourth connection terminal 111, so as to accommodate the errors generated during the production 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.

[0049] Optionally, as shown in Figures 2 and 3, the display device 10 also includes a conductive adhesive layer 400, which is arranged 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 connecting part 210 and the second connecting part 310 are electrically connected through the conductive particles 410, and the third connecting part 220 and the fourth connecting part 110 are electrically connected through the conductive particles 410, that is, the conductive adhesive layer 400 can play a role of both bonding and fixing, and also play a role of 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, heat pressing is used to impart a certain degree of fluidity to the conductive adhesive layer 400. The conductive particles 410 between the first connecting portion 210 and the second connecting portion 310, and between the third connecting portion 220 and the fourth connecting portion 110, rupture under the action of pressure, thereby achieving electrical connection between the first connecting portion 210 and the second connecting portion 310, and between the third connecting portion 220 and the fourth connecting portion 110, thereby achieving electrical connection between the display panel 100, the flexible circuit board 200, and the printed circuit board 300.

[0050] It should be noted that the spacing between the opposite side of two adjacent rows of first connecting parts 210 and the corresponding side of the second connecting part 310, as well as the spacing between the opposite side of two adjacent rows of third connecting parts 220 and the corresponding side of the fourth connecting part 110, can not only be selected and adjusted according to the respective processing alignment accuracy, but can also be selected and adjusted according to the number of corresponding conductive particles 410 according to actual connection requirements to ensure the connection stability between the first connecting part 210 and the second connecting part 310 and the third connecting part 220 and the fourth connecting part 110.

[0051] The above is a detailed introduction to a display device provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A display device, comprising: Display panel; A flexible circuit board, electrically connected to the display panel, wherein the flexible circuit board is provided with at least two rows of first connection parts distributed along a first direction; A printed circuit board is arranged on a side of the flexible circuit board having the first connection portion, and at least two rows of second connection portions distributed along the first direction are arranged on a side of the printed circuit board facing the flexible circuit board, 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, the orthographic projections of the opposite sides of two adjacent rows of the first connecting parts on the printed circuit board are at least partially located within the orthographic projections of the corresponding second connecting parts on the printed circuit board.

2. The display device according to claim 1, wherein: In the first direction, a spacing between two adjacent rows of the first connecting portions is greater than a spacing between two corresponding adjacent rows of the second connecting portions.

3. The display device according to claim 1, wherein: The flexible circuit board is provided with two rows of the first connecting parts, and the printed circuit board is provided with two rows of the second connecting parts. In the first direction, the orthographic projections of the opposite sides of the two rows of the second connecting parts on the flexible circuit board are at least partially located within the orthographic projections of the corresponding first connecting parts on the flexible circuit board.

4. The display device according to claim 1, wherein: The flexible circuit board is provided with at least three rows of the first connection parts, and the printed circuit board is provided with a plurality of the second connection parts which are the same in number as the first connection parts. In the first direction, the orthographic projections of the opposite sides of the two rows of the second connection parts respectively located at the two side edges on the flexible circuit board are at least partially located within the orthographic projections of the corresponding first connection parts on the flexible circuit board, and the orthographic projections of the opposite sides of the first connection parts located in the middle area on the printed circuit board in the first direction are located within the orthographic projections of the corresponding second connection parts on the printed circuit board.

5. The display device according to any one of claims 1 to 3, wherein: In the first direction, a distance between one side opposite to the first connection parts of two adjacent rows and one side corresponding to the second connection parts is greater than or equal to 50 micrometers and less than or equal to 120 micrometers.

6. The display device according to any one of claims 1 to 3, wherein: Each row of the first connection parts includes a plurality of first connection terminals spaced apart along a second direction, and each row of the second connection parts includes a plurality of second connection terminals spaced apart along the second direction, wherein the second connection terminals correspond to the first connection terminals one by one, and 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, the orthographic projections of the opposite sides of two adjacent first connecting terminals on the printed circuit board are at least partially located within the orthographic projections of the corresponding second connecting terminals on the printed circuit board.

7. The display device according to claim 6, wherein: In the second direction, a distance between two adjacent first connection terminals is greater than a distance between corresponding two adjacent second connection terminals.

8. The display device according to claim 1, wherein: At least two rows of third connection parts distributed along the first direction are provided on one side of the flexible circuit board facing the display panel, and at least two rows of fourth connection parts distributed along the first direction are provided on one side of the display panel facing the flexible circuit board, the fourth connection parts are provided corresponding to the third connection parts, and the fourth connection parts are electrically connected to the corresponding third connection parts; Wherein, in the first direction, the orthographic projections of the opposite sides of two adjacent rows of the third connection portions on the display panel are at least partially located within the orthographic projections of the corresponding fourth connection portions on the display panel.

9. The display device according to claim 8, wherein: The flexible circuit board is provided with two rows of the third connecting parts, and the display panel is provided with two rows of the fourth connecting parts. In the first direction, the orthographic projections of the opposite sides of the two rows of the fourth connecting parts on the flexible circuit board are at least partially located within the orthographic projections of the corresponding third connecting parts on the flexible circuit board.

10. The display device according to claim 8, wherein: The flexible circuit board is provided with at least three rows of the third connection parts, and the display panel is provided with a plurality of the fourth connection parts which is the same in number as the third connection parts. In the first direction, the orthographic projections of the opposite sides of the two rows of the fourth connection parts respectively located at the two side edges on the flexible circuit board are at least partially located within the orthographic projections of the corresponding third connection parts on the flexible circuit board, and the orthographic projections of the opposite sides of the third connection parts located in the middle area on the display panel in the first direction are located within the orthographic projections of the corresponding fourth connection parts on the display panel.

11. The display device according to claim 8 or 9, wherein: Each row of the third connection parts includes a plurality of third connection terminals spaced apart along the second direction, each row of the fourth connection parts includes a plurality of fourth connection terminals spaced apart along the second direction, the fourth connection terminals are arranged one-to-one 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; Wherein, in the second direction, the orthographic projections of opposite sides of two adjacent third connecting terminals on the display panel are at least partially located within the orthographic projections of the corresponding fourth connecting terminals on the display panel.

12. The display device according to claim 11, wherein: In the second direction, a distance between two adjacent third connection terminals is greater than a distance between corresponding two adjacent fourth connection terminals.

13. The display device according to claim 8, wherein: The display device also includes a conductive adhesive layer, which is arranged 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 connecting part and the second connecting part are electrically connected through the conductive particles, and the third connecting part and the fourth connecting part are electrically connected through the conductive particles.

14. A display device, comprising: A flexible circuit board, electrically connected to the display panel, wherein the flexible circuit board is provided with at least two rows of first connection portions distributed along a first direction and at least two rows of third connection portions distributed along the first direction; A printed circuit board is arranged on a side of the flexible circuit board having the first connection portion, and at least two rows of second connection portions distributed along the first direction are arranged on a side of the printed circuit board facing the flexible circuit board, 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; A display panel is arranged on a side of the flexible circuit board having the third connection portion, and at least two rows of fourth connection portions distributed along the first direction are arranged on a side of the display panel facing the flexible circuit board, 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; Wherein, in the first direction, the orthographic projections of one side opposite to the other of two adjacent rows of the first connecting parts on the printed circuit board are at least partially located within the orthographic projections of the corresponding second connecting parts on the printed circuit board, and the orthographic projections of one side opposite to the other of two adjacent rows of the third connecting parts on the display panel are at least partially located within the orthographic projections of the corresponding fourth connecting parts on the display panel.

15. The display device according to claim 14, wherein: In the first direction, a spacing between two adjacent rows of the first connecting portions is greater than a spacing between two corresponding adjacent rows of the second connecting portions.

16. The display device according to claim 14, wherein: The flexible circuit board is provided with two rows of the first connection parts and two rows of the third connection parts, the printed circuit board is provided with two rows of the second connection parts, and the display panel is provided with two rows of the fourth connection parts. In the first direction, the orthographic projections of the opposite sides of the two rows of the second connection parts on the flexible circuit board are at least partially located within the orthographic projections of the corresponding first connection parts on the flexible circuit board, and the orthographic projections of the opposite sides of the two rows of the fourth connection parts on the flexible circuit board are at least partially located within the orthographic projections of the corresponding third connection parts on the flexible circuit board.

17. The display device according to any one of claims 14 to 16, wherein: In the first direction, a distance between one side opposite to the first connection parts of two adjacent rows and one side corresponding to the second connection parts is greater than or equal to 50 micrometers and less than or equal to 120 micrometers.

18. The display device according to any one of claims 14 to 16, wherein: Each row of the first connection parts includes a plurality of first connection terminals spaced apart along a second direction, and each row of the second connection parts includes a plurality of second connection terminals spaced apart along the second direction, wherein the second connection terminals correspond to the first connection terminals one by one, and the second connection terminals are electrically connected to the corresponding first connection terminals, and the second direction forms an angle with the first direction; Each row of the third connection parts includes a plurality of third connection terminals spaced apart along the second direction, and each row of the fourth connection parts includes a plurality of fourth connection terminals spaced apart along the second direction, the fourth connection terminals are arranged in one-to-one correspondence with the third connection terminals, and the fourth connection terminals are electrically connected to the corresponding third connection terminals; Among them, in the second direction, the orthographic projection of the opposite side of two adjacent first connecting terminals on the printed circuit board is at least partially located within the orthographic projection of the corresponding second connecting terminal on the printed circuit board, and the orthographic projection of the opposite side of two adjacent third connecting terminals on the display panel is at least partially located within the orthographic projection of the corresponding fourth connecting terminal on the display panel.

19. The display device according to claim 18, 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, and the distance between two adjacent third connection terminals is greater than the distance between two corresponding adjacent fourth connection terminals.

20. The display device according to claim 14, wherein: The display device also includes a conductive adhesive layer, which is arranged 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 connecting part and the second connecting part are electrically connected through the conductive particles, and the third connecting part and the fourth connecting part are electrically connected through the conductive particles.

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