Touch display device

Abstract

The present invention relates to a touch display device, comprising a display panel and a flexible circuit board connected to the display panel; the flexible circuit board comprises a display function area and a touch function area, the display function area is connected to a control mainboard of the touch display device via a first connector, and the touch function area is connected to the control mainboard of the touch display device via a second connector.

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] The current mobile phone display screen has expanded from the traditional 21:9 6-7 inches to 7-9 inches (folding screen) close to 10:9; and the medium-sized display screen, due to the increase in size, has brought problems related to FPC (flexible circuit board) design: in order to reduce the Touch Loading (touch delay) caused by the larger size of the display screen, a 2T1R design is adopted (that is, touch electrode signal lines Tx are set on both opposite sides of the display area, and sensing electrode signal lines Rx are only set on one side of the display area), that is, two driving electrode signal lines and one sensing electrode signal line are set up, which increases the number of signal lines and thus makes FPC routing difficult, and the FPC needs to be enlarged in size. However, customers require the FPC size to be compressed to increase battery space. 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 flexible circuit board used for a large-size display screen is large and occupies battery space.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted in an embodiment of the present invention is: a touch display device, including a display panel and a flexible circuit board connected to the display panel; the flexible circuit board includes a display function area and a touch function area, the display function area is connected to the control mainboard of the touch display device through a first connector, and the touch function area is connected to the control mainboard of the touch display device through a second connector.

[0005] Optionally, the flexible circuit board includes a main body and a first connecting part and a second connecting part located on opposite sides of the main body in a length direction, the first connector is located at an end of the first connecting part, and the second connector is located at an end of the second connecting part; the length direction of the main body is parallel to the direction of the binding part between the display panel and the flexible circuit board.

[0006] Optionally, two display component areas and one touch component area including a touch IC are provided on the flexible circuit board, the touch component area is located in the second connecting portion, and at least one of the two display component areas is located in the main body portion.

[0007] Optionally, the flexible circuit board has a U-shaped structure, a first side of the main body is connected to the display panel, and the first connecting portion and the second connecting portion are both located on a second side of the main body that is opposite to the first side.

[0008] Optionally, 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, and a second area and a third area adjacent to the first area, and the second area is arranged opposite to the third area;

[0009] The second area is provided with a sensing electrode signal line led out from the central display area and connected to the touch component area;

[0010] The second area and the third area are both provided with driving electrode signal lines which are led out from the central display area and connected to the touch component area.

[0011] Optionally, there are a first touch binding area and a second touch binding area on both sides of the binding area connected to the main body on the display panel, and the drive electrode signal line includes a first drive electrode signal line located in the second area and a second drive electrode signal line located in the third area. The first drive electrode signal line is connected to the flexible circuit board through the first touch binding area, and is connected to the touch IC through the first routing on the flexible circuit board; the second drive electrode signal line and the sensing electrode signal line are connected to the flexible circuit board through the second touch binding area, and the first routing is extended along the extension direction of the main body.

[0012] Optionally, a third touch binding area is provided on one side of the binding area connected to the main body on the display panel, and the drive electrode signal line includes a first drive electrode signal line located in the second area and a second drive electrode signal line located in the third area, the first drive electrode signal line passes through the first area and is connected to the flexible circuit board through the third touch binding area, and the second drive electrode signal line is connected to the flexible circuit board through the third touch binding area.

[0013] Optionally, the first connector has 60 pins and the second connector has 10 pins.

[0014] Optionally, it further includes a chip-on-chip film disposed between the display panel and the flexible circuit board, and a display IC is disposed on the chip-on-chip film.

[0015] Optionally, a display IC is disposed on the display panel.

[0016] The beneficial effect of the present invention is that by setting the first connector and the second connector, the display and the touch are operated separately and independently, which reduces the difficulty of operation, realizes the convenience of lighting separately and the automation of production line operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structure of the touch display device in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0018] Figure 2 The structure of the touch display device in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0019] Figure 3 The structure of the touch display device in the embodiment of the present invention is shown in FIG. Figure 3 ;

[0020] Figure 4 The structure of the touch display device in the embodiment of the present invention is shown in FIG. Figure 4 . DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] Due to the increase in signal lines for large-size display screens, two IC designs are required, which leads to an increase in the number of PINs in the FPC connector; however, a single connector for conventional projects cannot meet the demand: because a single connector has a maximum of 60 PINs, and the number of pins in the dual IC design exceeds 60 PINs; two connector designs are required. Each time the light is turned on, two connectors need to be connected at the same time to light up normally, which brings great difficulties to production line production and internal verification.

[0024] In response to the above technical problems, in this embodiment, a touch display device includes a display panel and a flexible circuit board 3 connected to the display panel, the flexible circuit board includes a display function area and a touch function area, the display function area is connected to the control main board of the touch display device through a first connector 4, and the touch function area is connected to the control main board of the touch display device through a second connector 5.

[0025] Figure 1 FIG. 4 is a front view of the touch display device when the flexible circuit board 3 is in an unbent state. Figure 2 The back side schematic diagram of the touch display device after the flexible circuit board 3 is bent is shown.

[0026] In this embodiment, the display function area is connected to the control mainboard of the touch display device through the first connector 4, and the touch function area is connected to the control mainboard of the touch display device through the second connector 5. When only display-related parameters such as image quality need to be paid attention to, it is only necessary to connect to the second connector 4, and when only touch control is required, it is only necessary to connect to the first connector 5, that is, the touch control and display are controlled separately and independently, which reduces the difficulty of operation, realizes the convenience of lighting separately and the automation of production line operation.

[0027] In this embodiment, the flexible circuit board 3 includes a main body and a first connecting portion 33 and a second connecting portion 34 located on opposite sides of the length direction of the main body 32, the first connector 4 is located at the end of the first connecting portion 33, and the second connector 5 is located at the end of the second connecting portion 34; the length direction of the main body is parallel to the direction of the binding portion between the display panel and the flexible circuit board (perpendicular to Figure 1 X direction shown in ).

[0028] The first connector 4 and the second connector 5 are both extended out of the flexible circuit board 3. Figure 2 The first connector 4 and the second connector 5 are both located outside the flexible circuit board 3. The first connector 4 is arranged on the first connection part 33 and extends out of the first connection part 33 in a direction away from the second connection part 34, that is, the first connector 4 is exposed to the first connection part 33. Similarly, the second connector 5 is arranged on the second connection part 34 and extends out of the second connection part 34 in a direction away from the first connection part 33, that is, the second connector 5 is exposed to the second connection part 34. There is no need to add a transfer flexible circuit board, and direct connection can be performed.

[0029] As an example in this embodiment, two display component areas (including a first display component area 7 and a second display component area 8) and a touch component area 31 including a touch IC are provided on the flexible circuit board 3, and the touch component area 31 is located in the second connecting part, and at least one of the two display component areas is located in the main body 32.

[0030] The display components and touch components are changed from being centrally arranged in the main body 32 to being dispersedly arranged in the first connecting portion 33 and the second connecting portion 34, thereby reducing the number of components arranged in the main body 32 and the area occupied by the main body 32, especially reducing the area of ​​the flexible circuit board 3 in the first direction (reference Figure 1 The width of the touch display device in the first direction is reduced.

[0031] In this embodiment, the touch IC is used to obtain the touch position and send it to the CPU of the control mainboard of the touch display device through the second connector 5, and the corresponding touch function is realized after being processed by the CPU.

[0032] In this exemplary embodiment, the flexible circuit board 3 is in a U-shaped structure, the first side of the main body 32 is connected to the display panel 1, and the first connection part 33 and the second connection part 34 are both located on the second side of the main body 32 opposite to the first side.

[0033] In this embodiment, the display panel includes a central display area 1 and a wiring area 2 located around the central display area, the wiring area 2 includes a first area 21 located on a first side of the central display area 1 along a first direction, and a second area 22 and a third area 23 adjacent to the first area 21, and the second area 22 is arranged opposite to the third area 23;

[0034] The second area 22 is provided with a sensing electrode signal line 201 which is led out from the central display area 1 and connected to the touch component area 31;

[0035] The second area 22 and the third area 23 are both provided with driving electrode signal lines extending from the central display area 1 and connected to the touch component area 31 .

[0036] like Figure 1As shown, the central display area 1 is provided with a driving electrode and a sensing electrode for realizing touch control, and the second area 22 is provided with a driving electrode signal line Tx (first driving electrode signal line 101) connected to the driving electrode and a sensing electrode signal line Rx 201 connected to the sensing electrode, and the driving electrode signal line Tx and the sensing electrode signal line Rx are both along the first direction (reference Figure 1 The third area 23 is provided with a driving electrode signal line Tx (a second driving electrode signal line 102) extending along the first direction, and the touch control IC is arranged on the second connecting portion 34, and the driving electrode signal line Tx and the sensing electrode signal line Rx located on the third area 23 can be directly led to the touch IC without bending, and will not occupy the space of the flexible circuit board 3 and make the flexible circuit board 3 wider. Therefore, compared with the arrangement mode of arranging the touch IC on the main body 32, the width of the flexible circuit board 3 in the first direction can be reduced, the cost is saved, and the battery space does not need to be occupied, thereby increasing the battery accommodating space (reference Figure 2 , Figure 2 The middle part is the battery storage space).

[0037] In this embodiment, for example, reference Figure 1 A third touch binding area is provided on one side of the binding area connected to the main body 32 on the display panel, and the drive electrode signal line includes a first drive electrode signal line 101 located in the second area 22 and a second drive electrode signal line 102 located in the third area 23. The first drive electrode signal line 101 passes through the first area and is connected to the flexible circuit board 3 through the third touch binding area, and the second drive electrode signal line 102 is connected to the flexible circuit board 3 through the third touch binding area.

[0038] In this embodiment, for example, reference Figure 3 , there are a first touch binding area and a second touch binding area on both sides of the binding area connected to the main body 32 on the display panel, respectively, the driving electrode signal line includes a first driving electrode signal line 101 located in the second area 22 and a second driving electrode signal line 102 located in the third area 23, the first driving electrode signal line 101 is connected to the flexible circuit board 3 through the first touch binding area, and is connected to the touch IC through the first wiring 301 on the flexible circuit board 3; the second driving electrode signal line 102 and the sensing electrode signal line 201 are connected to the flexible circuit board 3 through the second touch binding area, wherein the first wiring 301 is extended along the extension direction of the main body 32.

[0039] like Figure 1In the embodiment shown, the drive electrode signal line includes a first drive electrode signal line 101 located in the second area 22, and a second drive electrode signal line 102 located in the third area 23, and the second drive electrode signal line 102 and the sensing electrode signal line 201 are connected to the flexible circuit board 3 through the second touch binding area; the first drive electrode signal line 101 extends to the first area 21 along the first direction, and then is connected to the flexible circuit board 3 through the first touch binding area, and is connected to the touch IC through the first trace 301 on the flexible circuit board 3; in this way, the first drive electrode signal line 101 does not occupy the space of the first area 21, and can avoid increasing the width of the touch display device in the first direction.

[0040] In this embodiment, the first connector has 60 pins, and the second connector has 10 pins.

[0041] In this embodiment, for example, the first area 21 of the display panel is provided with a display IC 6 , and the flexible circuit board 3 connects the signal of the display IC 6 to the CPU of the main control board of the touch display device.

[0042] The display panel may be a COP (Chip on panel) structure or a COF (Chip on film) structure. Figure 4 A chip-on-chip film 100 is further arranged between the display panel and the flexible circuit board 3, and a display IC 6 is arranged on the chip-on-chip film 100. The flexible circuit board 3 connects the signal of the display IC to the CPU of the main control board of the touch display device.

[0043] The driving electrode signal lines and the sensing electrode signal lines are connected to the touch control IC on the flexible circuit board through wiring on the chip-on-film.

[0044] The driving method of the touch display device comprises:

[0045] Connecting the first connector to perform display operation;

[0046] Connect the second connector to perform touch operation.

[0047] There is no need to connect the first connector and the second connector at the same time to achieve the corresponding operation. That is, when touch-related operations such as touch detection are required, it is only necessary to connect the first connector. When display-related operations such as image quality detection are required, it is only necessary to connect the second connector. This allows the touch and display to be controlled separately and independently, reduces the difficulty of operation, and realizes the convenience of lighting up each light and the automation of production line operations.

[0048] 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 regarded as within the scope of protection of the present invention.

Claims

1. A touch display device, comprising a display panel and a flexible circuit board connected to the display panel; characterized in that: The flexible circuit board includes a display function area and a touch function area, the display function area is connected to the control mainboard of the touch display device through a first connector, and the touch function area is connected to the control mainboard of the touch display device through a second connector; The flexible circuit board comprises a main body and a first connection part and a second connection part located at opposite sides of the main body in a length direction, the first connector is located at an end of the first connection part, and the second connector is located at an end of the second connection part; the length direction of the main body is parallel to the direction of the binding part between the display panel and the flexible circuit board; The first connector is disposed on the first connection portion and extends out of the first connection portion in a direction away from the second connection portion. The second connector is disposed on the second connection portion and extends out of the second connection portion in a direction away from the first connection portion.

2. The touch display device according to claim 1, characterized in that: The flexible circuit board is provided with two display component areas and a touch component area including a touch IC, the touch component area is located at the second connecting portion, and at least one of the two display component areas is located at the main body portion.

3. The touch display device according to claim 2, characterized in that: The flexible circuit board has a U-shaped structure, a first side of the main body is connected to the display panel, and the first connection portion and the second connection portion are both located on a second side of the main body that is opposite to the first side.

4. The touch display device according to claim 2, characterized in that: The display panel comprises a central display area and a wiring area located around the central display area, wherein the wiring area comprises a first area located at a first side of the central display area along a first direction, and a second area and a third area adjacent to the first area, wherein the second area is arranged opposite to the third area; The second area is provided with a sensing electrode signal line led out from the central display area and connected to the touch component area; The second area and the third area are both provided with driving electrode signal lines which are led out from the central display area and connected to the touch control IC.

5. The touch display device according to claim 4, characterized in that: There are a first touch binding area and a second touch binding area on both sides of the binding area connected to the main body on the display panel, respectively. The drive electrode signal line includes a first drive electrode signal line located in the second area and a second drive electrode signal line located in the third area. The first drive electrode signal line is connected to the flexible circuit board through the first touch binding area, and is connected to the touch IC through the first routing on the flexible circuit board; the second drive electrode signal line and the sensing electrode signal line are connected to the flexible circuit board through the second touch binding area, wherein the first routing is extended along the extension direction of the main body.

6. The touch display device according to claim 4, characterized in that: A third touch binding area is arranged on one side of the binding area connected to the main body on the display panel, and the drive electrode signal line includes a first drive electrode signal line located in the second area and a second drive electrode signal line located in the third area. The first drive electrode signal line passes through the first area and is connected to the flexible circuit board through the third touch binding area, and the second drive electrode signal line is connected to the flexible circuit board through the third touch binding area.

7. The touch display device according to claim 1, characterized in that: The first connector has 60 pins, and the second connector has 10 pins.

8. The touch display device according to claim 1, characterized in that: It also includes a chip-on-chip film disposed between the display panel and the flexible circuit board, and a display IC is disposed on the chip-on-chip film.

9. The touch display device according to claim 1, characterized in that: A display IC is arranged on the display panel.

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