Display device

Abstract

The embodiment of the present application discloses a display device. The display device includes an electrically connected display panel, a flexible circuit board and a printed circuit board, wherein at least two rows of first connection parts distributed along a first direction are arranged on the flexible circuit board, the printed circuit board is arranged on a side of the flexible circuit board having the first connection part, and at least two rows of second connection parts distributed along the first direction are arranged on a side of the printed circuit board facing the flexible circuit board, the second connection parts are arranged corresponding to the first connection parts and are electrically connected, and the orthographic projections of the opposite sides of the two adjacent rows of first connection parts on the printed circuit board are at least partially located within the orthographic projections of the corresponding second connection parts on the printed circuit board. The present application can effectively reduce the risk of the first connection part being sunken and warped by arranging the orthographic projections of the opposite sides of the two adjacent rows of first connection parts on the printed circuit board within the corresponding second connection part, and using the second connection part to support the first connection part, thereby avoiding abnormal press-fit impedance.

Description

Technical Field

[0001] The present application relates to the field of display, and in particular to a display device. Background Art

[0002] At present, in order to ensure the power supply capacity of the display device, medium and large-sized OLED display devices mostly use printed circuit boards (PCBs) to weld important electronic components on the circuit board, so as to process the input signal of the display device, and then input it to the driving circuit in the display panel through a flexible printed circuit (FPC), so as to realize the signal processing and power supply within the display panel. Among them, the flexible circuit board and the printed circuit board are connected by high-temperature pressing. Since the flexible circuit board is flexible, during the high-temperature pressing process, the opposite side of the two rows of connection parts on the flexible circuit board will be sunken and warped, resulting in abnormal pressing impedance between the flexible circuit board and the printed circuit board, thereby affecting the overall display quality of the display device. Summary of the invention

[0003] The embodiment of the present application provides a display device, which can solve the problem that a flexible circuit board and a printed circuit board are easily sunken and warped when connected, resulting in abnormal press-fit impedance in an existing display device.

[0004] An embodiment of the present application provides a display device, including:

[0005] Display panel;

[0006] 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;

[0007] 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;

[0008] 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.

[0009] Optionally, in some embodiments of the present application, 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.

[0010] Optionally, in some embodiments of the present application, 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, and 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.

[0011] Optionally, in some embodiments of the present application, in the first direction, a spacing between one side opposite to the other side of the first connecting portions of two adjacent rows and one side of the corresponding second connecting portions is greater than or equal to 50 microns and less than or equal to 120 microns.

[0012] Optionally, in some embodiments of the present application, each row of the first connection parts includes a plurality of first connection terminals spaced apart along the second direction, each row of the second connection parts includes a plurality of second connection terminals spaced apart along 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, 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.

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

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

[0016] 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.

[0017] Optionally, in some embodiments of the present application, the flexible circuit board is provided with two rows of the third 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 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.

[0018] Optionally, in some embodiments of the present application, 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 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, 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.

[0020] Optionally, in some embodiments of the present application, the display device further includes a conductive adhesive layer, wherein 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 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.

[0021] In the embodiment of the present application, the 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, at least two rows of first connection parts distributed along the first direction are arranged on the flexible circuit board, the printed circuit board is arranged on the side of the flexible circuit board having the first connection part, at least two rows of second connection parts distributed along the first direction are arranged on the side of the printed circuit board facing the flexible circuit board, the second connection parts are arranged corresponding to the first connection parts, the second connection parts are electrically connected to the corresponding first connection parts, and in the first direction, the orthographic projections of the opposite sides of the two adjacent rows of first connection parts on the printed circuit board are at least partially located within the orthographic projections of the corresponding second connection parts on the printed circuit board. The present application can effectively reduce the risk of the first connection part being sunken and warped by setting the orthographic projections of the opposite sides of the two adjacent rows of first connection parts on the printed circuit board within the orthographic projections of the corresponding second connection parts on the printed circuit board, and using the second connection parts to support the first connection parts, thereby avoiding abnormal press-fit impedance between the first connection parts and the second connection parts, and ensuring the display quality of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

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

[0024] Figure 2 This is a method provided by the embodiment of the present application. Figure 1 Cross-sectional view from medium AA perspective;

[0025] Figure 3 Another embodiment of the present application provides Figure 1 Cross-sectional view from medium AA perspective;

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

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

[0028] Description of reference numerals:

[0029] 10. Display device;

[0030] 100, display panel; 110, fourth connection portion; 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 connecting portion; 311, second connecting terminal;

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

[0034] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods 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 directional words such as "upper" and "lower" used generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

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

[0037] like Figure 1 As 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 the control signal 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 signal within the display panel 100.

[0038] Among them, Figure 4 As shown, at least two rows of first connection portions 210 distributed along a first direction X are provided on the flexible circuit board 200, and the first connection portions 210 are used to be electrically connected to the printed circuit board 300. A connection circuit is formed in the flexible circuit board 200, and the first connection portion 210 is electrically connected to the display panel 100 through the connection circuit 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 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 connecting line in the flexible circuit board 200 to drive the display of the display panel 100.

[0040] Among them, Figure 2 and Figure 3As shown, in the first direction X, the orthographic projection of the opposite side of the two adjacent rows of first connection parts 210 on the printed circuit board 300 is at least partially located within the orthographic projection of the corresponding second connection part 310 on the printed circuit board 300, that is, when the first connection part 210 is connected to the second connection part 310, the opposite side of the two adjacent rows of first connection parts 210 can at least partially be supported on the second connection part 310. Since the first connection part 210 is arranged on the flexible circuit board 200, when the first connection part 210 and the second connection part 310 are connected by hot pressing, if the opposite side of the two adjacent rows of first connection parts 210 protrudes from the corresponding second connection part 310, the first connection part 210 will be sunken and warped on this side, and the other side of the first connection part 210 may be warped in the opposite direction, thereby causing uneven contact between the first connection part 210 and the second connection part 310, and further causing abnormal pressing impedance between the first connection part 210 and the second connection part 310. In the present application, the orthographic projection of the opposite side of two adjacent rows of first connection parts 210 on the printed circuit board 300 is at least partially arranged within the orthographic projection of the corresponding second connection part 310 on the printed circuit board 300, and the second connection part 310 is used to support the first connection part 210, so that the risk of the first connection part 210 being sunken and warped can be effectively reduced, thereby avoiding the occurrence of abnormal pressing impedance between the first connection part 210 and the second connection part 310, thereby ensuring the display quality of the display device 10.

[0041] In the embodiment of the present application, 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. At least two rows of first connection portions 210 distributed along a first direction X are arranged on the flexible circuit board 200. The printed circuit board 300 is arranged on a side of the flexible circuit board 200 having the first connection portions 210. At least two rows of second connection portions 310 distributed along the first direction X are arranged on a side of the printed circuit board 300 facing the flexible circuit board 200. 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. In the first direction X, the orthographic projections of the opposite sides of two adjacent rows of first connection portions 210 on the printed circuit board 300 are at least partially located within the orthographic projections of the corresponding second connection portions 310 on the printed circuit board 300. In the present application, the orthographic projection of the opposite side of two adjacent rows of first connection parts 210 on the printed circuit board 300 is at least partially arranged within the orthographic projection of the corresponding second connection part 310 on the printed circuit board 300, and the second connection part 310 is used to support the first connection part 210, so that the risk of the first connection part 210 being sunken and warped can be effectively reduced, thereby avoiding the occurrence of abnormal pressing impedance between the first connection part 210 and the second connection part 310, thereby ensuring the display quality of the display device 10.

[0042] Optional, such as Figures 2 to 4 As shown, 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 caused by the expansion of the printed circuit board 300 in the first direction X during the hot pressing process, thereby further avoiding the opposite sides of the two adjacent rows of first connection parts 210 from protruding from the corresponding second connection parts 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.

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

[0044] In other embodiments, when the flexible circuit board 200 is provided with multiple rows (greater than two rows) of first connection portions 210, and the printed circuit board 300 is provided with multiple rows (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 respectively 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, and the orthographic projections of the opposite sides of the first connection portions 210 located in the middle area on the printed circuit board 300 in the first direction X 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 from the corresponding second connection portions 310, and the dimensions of the first connection portions 210 located in the middle area in the first direction X are smaller than the corresponding second connection portions 310.

[0045] 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 part of the first connection part 210 located on the two side edges in the first direction X that protrudes from the corresponding second connection part 310 will not be subjected to pressure, so no depression or warping will occur. By setting the first connection part 210 located on the two side edges to protrude from the corresponding second connection part 310, it can be ensured that the first connection part 210 and the second connection part 310 have sufficient connection area, so as to effectively improve the connection stability between the first connection part 210 and the second connection part 310.

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

[0047] In the actual manufacturing 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, and there is no special limitation here.

[0048] Optionally, each row of the first connection parts 210 includes a plurality of first connection terminals 211 spaced apart along the second direction Y, and each row of the second connection parts 310 includes a plurality of second connection terminals 311 spaced apart along the second direction Y, the second connection terminals 311 are arranged one-to-one with the first connection terminals 211, the second connection terminals 311 are electrically connected to the corresponding first connection terminals 211, and the second direction Y forms an angle with the first direction X. That is, the first connection parts 210 and the second connection parts 310 are electrically connected through the corresponding connection of the plurality of first connection terminals 211 and the 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, and the first direction X and the second direction Y represent the horizontal direction and the vertical direction, respectively, 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] In the first direction X, the orthographic projection of the opposite side of the two adjacent rows of third connection parts 220 on the display panel 100 is at least partially located within the orthographic projection of the corresponding fourth connection part 110 on the display panel 100, that is, when the third connection part 220 is connected to the fourth connection part 110, the opposite side of the two adjacent rows of third connection parts 220 can at least partially be supported on the fourth connection part 110. Since the third connection part 220 is arranged on the flexible circuit board 200, when the third connection part 220 and the fourth connection part 110 are connected by hot pressing, if the opposite side of the two adjacent rows of third connection parts 220 protrudes from the corresponding fourth connection part 110, the third connection part 220 will be sunken and warped on this side, and the other side of the third connection part 220 may be warped in the opposite direction, thereby causing uneven contact between the third connection part 220 and the fourth connection part 110, and further causing abnormal pressing impedance between the third connection part 220 and the fourth connection part 110. The present application can effectively reduce the risk of the third connection part 220 being sunken and warped by at least partially disposing the orthographic projection of the opposite side of two adjacent rows of third connection parts 220 on the display panel 100 within the orthographic projection of the corresponding fourth connection part 110 on the display panel 100, and using the fourth connection part 110 to support the third connection part 220, thereby avoiding abnormal pressing impedance between the third connection part 220 and the fourth connection part 110, thereby ensuring the display quality of the display device 10.

[0053] In some embodiments, the flexible circuit board 200 is provided with two rows of third connection parts 220, and the display panel 100 is provided with two rows of fourth connection parts 110. In the first direction X, the orthographic projections of the opposite sides of the two rows of fourth connection parts 110 on the flexible circuit board 200 are at least partially located within the orthographic projections of the corresponding third connection parts 220 on the flexible circuit board 200. That is, the opposite sides of the two rows of third connection parts 220 at least partially protrude from the edge of the corresponding fourth connection part 110 or are flush with the edge of the fourth connection part 110, so as to avoid the concavity and warping of the opposite sides of the two rows of third connection parts 220, and ensure that the third connection parts 220 and the fourth connection parts 110 have sufficient connection area.

[0054] In other embodiments, when the flexible circuit board 200 is provided with multiple rows (greater than two rows) of third connection portions 220, and the display panel 100 is provided with multiple rows (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 respectively 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, and the orthographic projections of the opposite sides of the third connection portions 220 located in the middle area on the display panel 100 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 from the corresponding fourth connection portions 110, and the dimensions of the third connection portions 220 located in the middle area in the first direction X are all smaller than the corresponding fourth connection portions 110.

[0055] It should be noted that when the third connection part 220 and the fourth connection part 110 are hot-pressed and connected, 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 can be ensured that the third connection parts 220 and the fourth connection parts 110 have sufficient connection area, so as to effectively improve the connection stability between the third connection parts 220 and the fourth connection parts 110.

[0056] Optionally, each row of the third connection parts 220 includes a plurality of third connection terminals 221 arranged at intervals along the second direction Y, and each row of the fourth connection parts 110 includes a plurality of fourth connection terminals 111 arranged at intervals along the second direction Y, and the fourth connection terminals 111 are arranged one-to-one with the third connection terminals 221, and 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 parts 220 and the fourth connection parts 110 are electrically connected through the corresponding connection of the plurality of third connection terminals 221 and the plurality of fourth connection terminals 111, and the third connection terminals 221 are electrically connected to the first connection terminals 211 through the connection lines in the flexible circuit board 200, thereby being 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, and the first direction X and the second direction Y represent the horizontal direction and the vertical direction, respectively, that is, the first direction X is perpendicular to the second direction Y.

[0057] Among them, in the second direction Y, the orthographic projection of the opposite side of two adjacent third connection terminals 221 on the display panel 100 is at least partially located within the orthographic projection of the corresponding fourth connection terminal 111 on the display panel 100, that is, when the third connection terminal 221 is connected to the fourth connection terminal 111, the opposite side of the two adjacent third connection terminals 221 can be at least partially supported on the fourth connection terminal 111. Since the size of the third connection terminal 221 in the second direction Y is much smaller than the size in the first direction X, the influence of the third connection terminal 221 that may be sunken and lifted in the second direction Y can be ignored, but in the embodiment of the present application, the arrangement of the third connection terminal 221 and the fourth connection terminal 111 in the second direction Y is consistent with that in the first direction X, which can minimize the risk of the third connection terminal 221 being sunken and lifted, and further minimize the risk of abnormal press-fit impedance between the third connection terminal 221 and the fourth connection terminal 111.

[0058] 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 side 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 terminals 221 and the fourth connection terminals 111, thereby ensuring the effective and stable connection between the third connection terminals 221 and the fourth connection terminals 111.

[0059] Optional, such as Figure 2 and Figure 3 As shown, 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 bonding and fixing, and can also play a role of electrical connection. When the flexible circuit board 200 is connected to the display panel 100 and the flexible circuit board 200 is connected to the printed circuit board 300, the conductive adhesive layer 400 is made to have a certain fluidity by heat pressing, and the conductive particles 410 between the first connection part 210 and the second connection part 310 and between the third connection part 220 and the fourth connection part 110 are broken under the action of pressure, so that the first connection part 210 and the second connection part 310 and the third connection part 220 and the fourth connection part 110 are conductive, thereby realizing 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 spacing between the opposite side of two adjacent rows of first connection parts 210 and the corresponding side of the second connection part 310, as well as the spacing between the opposite side of two adjacent rows of third connection parts 220 and the corresponding side of the fourth connection part 110, can not only be selected and adjusted according to the respective processing alignment accuracy, but also can be selected and adjusted according to the number of corresponding conductive particles 410 according to actual connection requirements, so as to ensure the connection stability between the first connection part 210 and the second connection part 310 and between the third connection part 220 and the fourth connection part 110.

[0061] 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 technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method 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, characterized in that: include: 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; In which, in the first direction, the orthographic projection of the opposite side of two adjacent rows of the first connecting parts on the printed circuit board is at least partially located within the orthographic projection of the corresponding second connecting part on the printed circuit board; in the first direction, the spacing between two adjacent rows of the first connecting parts is greater than the spacing between the corresponding adjacent two rows of the second connecting parts; 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, and in the first direction, the orthographic projection of the opposite side of the two rows of the second connecting parts on the flexible circuit board is at least partially located within the orthographic projection of the corresponding first connecting part on the flexible circuit board.

2. The display device according to claim 1, characterized in that 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.

3. The display device according to claim 1, characterized in that 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.

4. The display device according to claim 3, characterized in that: In the second direction, a distance between two adjacent first connection terminals is greater than a distance between corresponding two adjacent second connection terminals.

5. The display device according to claim 1, characterized in that 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.

6. The display device according to claim 5, characterized in that: 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.

7. The display device according to claim 5 or 6, characterized in that: 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.

8. The display device according to claim 5, characterized in that 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.

Images