Touch display device

Abstract

The present invention relates to a touch display device, comprising a display panel and a main flexible circuit board and a first bridge flexible circuit board connected to the display panel, wherein the first bridge flexible circuit board is provided with touch components including a touch IC, the first bridge flexible circuit board comprises a first binding area bound and connected to the display panel, a first electrode signal line led out from the display panel is connected to the first bridge flexible circuit board through the first binding area, and is connected to the touch IC through the routing on the first bridge flexible circuit board.

Description

Technical Field

[0001] The present invention relates to the technical field of display product manufacturing, and in particular to a touch display device. Background Art

[0002] With the rapid advancement of electronic products, manufacturers are increasingly focused on increasing battery capacity, improving standby time, and reducing costs. Traditional FMLOC (flexible multi-layer on cell) displays place the touch control IC (TIC) on the MFPC (main flexible printed circuit board). Consequently, the RX (sensing electrode signal lines) and TX (driving electrode signal lines) must be routed to the main flexible printed circuit board to connect to the touch IC. This, due to routing restrictions (for example, adjacent layers cannot be repeated), increases the space occupied by the main flexible printed circuit board. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a touch display device to solve the problem that the main flexible circuit board occupies a large space.

[0004] In order to achieve the above-mentioned objectives, the technical solution adopted by the present invention is: a touch display device, including a display panel and a main flexible circuit board and a first bridge flexible circuit board connected to the display panel, the first bridge flexible circuit board is provided with touch components including a touch IC, the first bridge flexible circuit board includes a first binding area bound to the display panel, the first electrode signal line led out from the display panel is connected to the first bridge flexible circuit board through the first binding area, and is connected to the touch IC through the wiring on the first bridge flexible circuit board.

[0005] Optionally, the first bridging flexible circuit board is L-shaped, including a first part and a second part that are intersecting, the first part is provided with the first binding area, and the touch component is provided on the second part.

[0006] Optionally, the second part is provided with a second binding area for binding and connecting with the main flexible circuit board, and the main flexible circuit board is provided with a third binding area for binding and connecting with the display panel. The second electrode signal line led out from the display panel is connected to the main flexible circuit board through the third binding area, and is connected to the first bridging flexible circuit board through the second binding area, and is connected to the touch IC through the routing on the first bridging flexible circuit board.

[0007] Optionally, a fourth binding area for binding and connecting to the main flexible circuit board is provided at one end of the second part away from the first part, and a first connector connected to the main circuit board is provided on the main flexible circuit board. The power signal line led out of the first connector is connected to the first bridging flexible circuit board through the fourth binding area, and is connected to the touch IC through the routing on the first bridging flexible circuit board.

[0008] Optionally, the first connector is located on a side of the second part away from the first part.

[0009] Optionally, the display panel includes a central display area and a routing area located around the central display area, the routing area includes a first area located on a first side of the central display area along a first direction, the second binding area and the third binding area are both arranged in the first area, and the second binding area and the third binding area are arranged in a direction perpendicular to the first direction, and the extension direction of the first part of the first bridging flexible circuit board is parallel to the first direction.

[0010] Optionally, a distance between the first binding area and the second binding area parallel to the first direction is greater than or equal to 1 mm.

[0011] Optionally, the first electrode signal line is a sensing electrode signal line, and the second electrode signal line is a driving electrode signal line.

[0012] Optionally, the main flexible circuit board and the first bridge flexible circuit board are both double-layer boards.

[0013] Optionally, the first bridge flexible circuit board is U-shaped, comprising a first connecting portion and a second connecting portion and a third connecting portion located on opposite sides of the first connecting portion;

[0014] The touch component is arranged on the first connecting part, the second connecting part is provided with the first binding area, and the third connecting part is provided with the fifth binding area, which is used to be bound and connected with the display panel. The second electrode signal line led out from the display panel is connected to the first bridge flexible circuit board through the fifth binding area, and is connected to the touch IC through the routing on the first bridge flexible circuit board.

[0015] Optionally, the main flexible circuit board is provided with a second connector connected to the main circuit board, and the touch display device further includes a second bridging flexible circuit board;

[0016] One end of the second bridge flexible circuit board is bound and connected to the first connecting portion of the first bridge flexible circuit board, and the other end of the second bridge flexible circuit board is bound and connected to the main flexible circuit board. The power signal line led out of the second connector is bound and connected to the first bridge flexible circuit board through the second bridge flexible circuit board, and is connected to the touch IC through the wiring on the first bridge flexible circuit board.

[0017] Optionally, the second connector is located on a side of the third connecting portion away from the second connecting portion.

[0018] Optionally, an extending direction of the second bridging flexible circuit board is parallel to an extending direction of the second connecting portion.

[0019] Optionally, the first electrode signal line is a sensing electrode signal line, and the second electrode signal line is a driving electrode signal line.

[0020] Optionally, the length of the first bridge flexible circuit board in the first direction is smaller than the length of the main flexible circuit board in the first direction, and the length of the first bridge flexible circuit board in a second direction intersecting with the first direction is smaller than the length of the main flexible circuit board in the second direction.

[0021] The beneficial effects of the present invention are as follows: by setting up the first bridge flexible circuit board, the touch IC is set on the first bridge flexible circuit board, and the first electrode signal line is directly introduced into the first bridge flexible circuit board without passing through the main flexible circuit board, thereby reducing the wiring space on the main flexible circuit board and thus reducing the space occupied by the main flexible circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a touch display device according to an embodiment of the present invention is shown. Figure 1 ;

[0023] Figure 2 A schematic diagram of the structure of a touch display device according to an embodiment of the present invention is shown. Figure 2 . DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In this embodiment, a touch display device is provided, including a display panel 1 and a main flexible circuit board 2 and a first bridge flexible circuit board 3 connected to the display panel 1. Touch components including a touch IC 4 are provided on the first bridge flexible circuit board 3. The first bridge flexible circuit board 3 includes a first binding area that is bound to the display panel 1. The first electrode signal line 10 led out from the display panel 1 is connected to the first bridge flexible circuit board 3 through the first binding area, and is connected to the touch IC 4 through the wiring on the first bridge flexible circuit board 3.

[0027] In the related art, due to the excessive wiring on the main flexible circuit board 2, a multi-layer board structure is adopted, generally using a four-layer board or a six-layer board. This is also limited by the routing rules of the drive electrode signal lines 20 and the sensing electrode signal lines. For example, adjacent layers cannot be repeatedly routed. The sensing electrode signal lines 10Rx and the drive electrode signal lines 20Tx must be perpendicular to other routing lines on adjacent layers and cannot be parallel or oblique to each other. This increases costs and increases the wiring space of the main flexible circuit board 2. In addition, each signal line must be connected through a via. Each signal line has a certain width, and the via also occupies a certain space. Considering that drilling a via for each signal line would multiply this space, it would greatly increase the layout difficulty of the main flexible circuit board 2 and force the increase of the Y-axis width of the main flexible circuit board 2.

[0028] In this embodiment, the touch IC 4 is disposed on the first bridge flexible circuit board 3 by disposing the first bridge flexible circuit board 3, and the first electrode signal line 10 is directly introduced into the first bridge flexible circuit board 3 without passing through the main flexible circuit board 2, thereby reducing the wiring space on the main flexible circuit board 2.

[0029] And since the signal line on the first bridge flexible circuit board 3 is single, the first bridge flexible circuit board 3 can be set as a double-layer board. Since the main flexible circuit board 2 reduces the first electrode signal line 10, interference is reduced. The main flexible circuit board 2 can also be set as a double-layer board to reduce costs.

[0030] In this embodiment, for example, the first electrode signal line is a sensing electrode signal line Rx, but the present invention is not limited thereto.

[0031] In this embodiment, the first bridging flexible circuit board 3 is L-shaped and includes a first portion 31 and a second portion 32 that are intersecting. The first portion 31 is provided with the first binding area, and the touch component is provided on the second portion 32 .

[0032] In this embodiment, the angle between the first portion and the second portion can be set according to actual needs. In a specific implementation of this embodiment, the first portion and the second portion are arranged perpendicular to each other, but the present invention is not limited thereto.

[0033] In this embodiment, the second part 32 is exemplarily provided with a second binding area for binding and connecting with the main flexible circuit board 2, and the main flexible circuit board 2 is provided with a third binding area for binding and connecting with the display panel 1. The second electrode signal line 20 led out from the display panel 1 is connected to the main flexible circuit board 2 through the third binding area, and is connected to the first bridge flexible circuit board 3 through the second binding area, and is connected to the touch IC 4 through the routing on the first bridge flexible circuit board 3.

[0034] The touch IC 4 is disposed on the first bridge flexible circuit board 3 , and the second electrode signal line 20 needs to pass through the main flexible circuit board 2 and be introduced into the first bridge flexible circuit board 3 to be connected to the touch IC 4 .

[0035] In this embodiment, the second electrode signal line 20 is a driving electrode signal line Tx, but the present invention is not limited thereto.

[0036] In this embodiment, the second part 32 is exemplarily provided with a fourth binding area for binding and connecting with the main flexible circuit board 2. The main flexible circuit board 2 is provided with a first connector 5 connected to the main circuit board. The power signal line 30 led out of the first connector 5 is connected to the first bridge flexible circuit board 3 through the fourth binding area, and is connected to the touch IC 4 through the wiring on the first bridge flexible circuit board 3.

[0037] In this embodiment, the first connector 5 is illustratively located on a side of the second portion 32 away from the first portion 31 , thereby avoiding increasing the Y-direction space of the main flexible circuit board 2 .

[0038] In this embodiment, the first connector 5 is illustratively a B2B connector (Board to Board, used to connect different circuit boards).

[0039] In this embodiment, the display panel 1 includes a central display area and a wiring area located around the central display area. The wiring area includes a first direction (reference Figure 1 The second binding area and the third binding area are both arranged in the first area, and the second binding area and the third binding area are arranged in a direction perpendicular to the first direction (reference direction). Figure 1 The first portion 31 of the first bridge flexible circuit board 3 is arranged in the X direction, and the extending direction of the first portion 31 of the first bridge flexible circuit board 3 is parallel to the first direction.

[0040] In this embodiment, to facilitate wiring, the first part is arranged parallel to the first direction, the second part is arranged perpendicular to the first direction, the first binding area is arranged at an end of the first part away from the second part in the first direction, and the second binding area is arranged at an end of the second part away from the first part in a direction perpendicular to the first direction.

[0041] In this embodiment, for example, the distance between the first binding area and the second binding area parallel to the first direction is greater than or equal to 1 mm.

[0042] As an example in this embodiment, the connection between the first bridge flexible circuit board 3 and the display panel 1, the connection between the first bridge flexible circuit board 3 and the main flexible circuit board 2, and the connection between the main flexible circuit board 2 and the display panel 1 can all be achieved through ACF (Anisotropic Conductive Film) or solder paste.

[0043] As an example, in this embodiment, during manufacturing, the first bridge flexible circuit board 3 is first bound and connected to the main flexible circuit board 2, and then the first bridge flexible circuit board 3 and the main flexible circuit board 2 that are bound together are bound and connected to the display panel 1 using a synchronous process.

[0044] It should be noted that when the main flexible circuit board 2 is pressed against the display panel 1, the heat-affected zone of the pressure head may cover the routing of the first bridging flexible circuit board 3. However, the flexible circuit board needs to undergo a high temperature of 190 degrees for reflow soldering when welding devices. However, the temperature when bonding the main flexible circuit board 2 to the display panel 1 is much lower than 190 degrees, that is, it will not affect the first bridging flexible circuit board 3. When manufacturing the main flexible circuit board 2 and the first bridging flexible circuit board 3, they can be designed according to the total width of the main flexible circuit board 2 and the first bridging flexible circuit board 3.

[0045] In this embodiment, the first bridge flexible circuit board 3 is U-shaped and includes a first connection portion 33 and a second connection portion 34 and a third connection portion 35 located on opposite sides of the first connection portion 33.

[0046] The touch component is arranged on the first connecting part 33, the second connecting part 34 is provided with the first binding area, and the third connecting part 35 is provided with a fifth binding area for binding and connecting with the display panel 1. The second electrode signal line 20 led out from the display panel 1 is connected to the first bridge flexible circuit board 3 through the fifth binding area, and is connected to the touch IC 4 through the wiring on the first bridge flexible circuit board 3.

[0047] In this embodiment, the first electrode signal line 10 is a sensing electrode signal line, and the second electrode signal line is a driving electrode signal line, but the present invention is not limited thereto.

[0048] Using the above technical solution, both the sensing electrode signal lines and the driving electrode signal lines are routed directly into the first bridging flexible circuit board 3, without passing through the main flexible circuit board 2. This significantly reduces the wiring space on the main flexible circuit board 2, allowing the main flexible circuit board 2 to be made extremely narrow, providing more space for the customer's battery compartment. Furthermore, the sensing electrode signal lines are connected to the touch IC 4 via the wiring located on the second connecting portion 34, while the driving electrode signal lines are connected to the touch IC 4 via the wiring located on the third connecting portion 35, eliminating overlap and interference. Furthermore, by routing both the sensing electrode signal lines and the driving electrode signal lines directly into the first bridging flexible circuit board 3, they do not interfere with other wiring on the main flexible circuit board 2, reducing the wiring complexity on the main flexible circuit board 2.

[0049] In this embodiment, the display panel 1 includes a central display area and a wiring area located around the central display area, wherein the wiring area includes a first direction (reference Figure 1 The second binding area and the fifth binding area are both arranged in the first area, and the second binding area and the fifth binding area are arranged in a direction perpendicular to the first direction (reference direction). Figure 1The second binding area and the fifth binding area are arranged in the first direction, and in the first direction, the second binding area and the fifth binding area are located on both sides of the binding area where the main flexible circuit board 2 is bound to the first area, the extension direction of the first connection part 33 is perpendicular to the first direction, the second connection part 34 and the third connection part 35 are both arranged parallel to the first direction, the first binding area is arranged at an end of the second connection part 34 away from the first connection part 33 in the first direction, and the fifth binding area is located at an end of the third connection part 35 away from the first connection part 33 in the first direction.

[0050] In this embodiment, the main flexible circuit board 2 is provided with a second connector 7 connected to the main circuit board, and the touch display device further includes a second bridge flexible circuit board 6;

[0051] One end of the second bridging flexible circuit board 6 is bound and connected to the first connecting portion 33 of the first bridging flexible circuit board 3, and the other end of the second bridging flexible circuit board 6 is bound and connected to the main flexible circuit board 2. The power signal line 30 led out of the second connector 7 is bound and connected to the first bridging flexible circuit board 3 through the second bridging flexible circuit board 6, and is connected to the touch IC 4 through the wiring on the first bridging flexible circuit board 3.

[0052] In this embodiment, Figure 1 The first bridge flexible circuit board 3 shown in FIG is L-shaped. Figure 2 The first bridge flexible circuit board 3 shown in FIG is U-shaped. Figure 1 In the touch display device shown in , two binding areas are provided on the main flexible circuit board 2, one binding area is used to connect the driving electrode signal line 20 with the first bridge flexible circuit board 3, and one binding area is used to connect the power signal line 30 with the first bridge flexible circuit board 3, and only the sensing electrode signal line 10 is directly introduced into the first bridge flexible circuit board 3. Figure 2 In the touch display device shown in FIG, the main flexible circuit board 2 simultaneously connects the driving electrode signal line 20 and the sensing electrode signal line 10 to the first bridge flexible circuit board 3 directly without passing through the main flexible circuit board 2, and the main flexible circuit board 2 only needs to set a binding area for connecting with the second bridge circuit board. Figure 2 The setting method in Figure 1 The arrangement further reduces the wiring space of the main flexible circuit board 2.

[0053] In this embodiment, for example, the second connector 7 is located on a side of the third connecting portion 35 away from the second connecting portion 34 .

[0054] The second connector 7 is disposed on a side of the third connection portion 35 away from the second connection portion 34 , so as to prevent the second connector 7 from occupying the Y-direction space of the main flexible circuit board 2 .

[0055] In this embodiment, the second connector 7 is illustratively a B2B connector (Board to Board, used to connect different circuit boards).

[0056] In this embodiment, for example, the extending direction of the second bridge flexible circuit board 6 is parallel to the extending direction of the second connecting portion 34 .

[0057] In this embodiment, for example, the length of the first bridge flexible circuit board 3 in the first direction is smaller than the length of the main flexible circuit board 2 in the first direction, and the length of the first bridge flexible circuit board 3 in a second direction intersecting with the first direction is smaller than the length of the main flexible circuit board 2 in the second direction.

[0058] The above is a preferred embodiment of the present invention. It should be noted that for ordinary technicians in this field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A touch display device, characterized in that: It comprises a display panel, a main flexible circuit board connected to the display panel, and a first bridge flexible circuit board, wherein the first bridge flexible circuit board is provided with a touch component including a touch IC, the first bridge flexible circuit board comprises a first binding area bound and connected to the display panel, a first electrode signal line led out of the display panel is connected to the first bridge flexible circuit board through the first binding area, and is connected to the touch IC through the wiring on the first bridge flexible circuit board; The first bridge flexible circuit board is L-shaped, and includes a first part and a second part that are intersectingly arranged, the first part is provided with the first binding area, and the touch control component is arranged on the second part; The second part is provided with a second binding area for binding and connecting with the main flexible circuit board, and the main flexible circuit board is provided with a third binding area for binding and connecting with the display panel. The second electrode signal line led out from the display panel is connected with the main flexible circuit board through the third binding area, and is connected with the first bridge flexible circuit board through the second binding area, and is connected with the touch IC through the wiring on the first bridge flexible circuit board; or, The first bridge flexible circuit board is U-shaped, and includes a first connection portion and a second connection portion and a third connection portion located on two opposite sides of the first connection portion; The touch component is arranged on the first connecting part, the second connecting part is provided with the first binding area, and the third connecting part is provided with the fifth binding area, which is used to be bound and connected with the display panel. The second electrode signal line led out from the display panel is connected with the first bridging flexible circuit board through the fifth binding area, and is connected with the touch IC through the routing on the first bridging flexible circuit board.

2. The touch display device according to claim 1, characterized in that: A fourth binding area for binding and connecting with the main flexible circuit board is provided at one end of the second part away from the first part. A first connector connected to the main circuit board is provided on the main flexible circuit board. The power signal line led out of the first connector is connected to the first bridge flexible circuit board through the fourth binding area, and is connected to the touch IC through the routing on the first bridge flexible circuit board.

3. The touch display device according to claim 2, characterized in that: The first connector is located at a side of the second part away from the first part.

4. The touch display device according to claim 1, characterized in that: The display panel includes a central display area and a routing area located around the central display area, the routing area includes a first area located on a first side of the central display area along a first direction, the second binding area and the third binding area are both arranged in the first area, and the second binding area and the third binding area are arranged in a direction perpendicular to the first direction, and the extension direction of the first part of the first bridging flexible circuit board is parallel to the first direction.

5. The touch display device according to claim 4, characterized in that: A distance between the first binding area and the second binding area parallel to the first direction is greater than or equal to 1 mm.

6. The touch display device according to claim 1, characterized in that: The first electrode signal line is a sensing electrode signal line, and the second electrode signal line is a driving electrode signal line.

7. The touch display device according to claim 1, characterized in that: The main flexible circuit board and the first bridge flexible circuit board are both double-layer boards.

8. The touch display device according to claim 1, characterized in that: The main flexible circuit board is provided with a second connector connected to the main circuit board, and the touch display device further includes a second bridging flexible circuit board; One end of the second bridging flexible circuit board is bound and connected to the first connecting portion of the first bridging flexible circuit board, the other end of the second bridging flexible circuit board is bound and connected to the main flexible circuit board, and the power signal line led out of the second connector is bound and connected to the first bridging flexible circuit board through the second bridging flexible circuit board, and is connected to the touch IC through the routing on the first bridging flexible circuit board.

9. The touch display device according to claim 8, characterized in that: The second connector is located on a side of the third connecting portion away from the second connecting portion.

10. The touch display device according to claim 8, characterized in that: An extending direction of the second bridge flexible circuit board is parallel to an extending direction of the second connecting portion.

11. The touch display device according to claim 1, characterized in that: The first electrode signal line is a sensing electrode signal line, and the second electrode signal line is a driving electrode signal line.

12. The touch display device according to any one of claims 1 to 11, characterized in that: The display panel includes a central display area and a wiring area located around the central display area, the wiring area includes a first area located on a first side of the central display area along a first direction, the second binding area and the third binding area are both arranged in the first area, and the second binding area and the third binding area are arranged in a direction perpendicular to the first direction, and the extension direction of the first part of the first bridge flexible circuit board is parallel to the first direction; The length of the first bridge flexible circuit board in the first direction is shorter than the length of the main flexible circuit board in the first direction, and the length of the first bridge flexible circuit board in a second direction intersecting the first direction is shorter than the length of the main flexible circuit board in the second direction.

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