Touch display panel and display device

Abstract

The invention provides a touch display panel and a display device, a control chip of the touch display panel is provided with an active surface, the active surface is provided with a first side and a second side, and the first side is provided with a display signal contact and a touch signal contact; the circuit board is arranged on one side, with the active surface, of the control chip; the first touch signal wire is electrically connected with the touch signal contact, and the first touch signal wire is provided with a first part overlapped with the projection of the active surface on the circuit board; the first part is arranged between the projection of the first side on the circuit board and the projection of the second side on the circuit board; according to the invention, the touch signal contacts are arranged on the active surface, so that the supply capability of touch signals can be improved; and the first touch signal wire is arranged to be wired from the projection of the active surface on the circuit board to the second side, so that the first touch signal wire and the display signal wire extend out from different sides of the control chip, and signal coupling of the display signal wire and the first touch signal wire is reduced.

Description

Technical Field

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

[0002] An integrated circuit board (IC) and a flexible printed circuit (FPC) are provided in the touch display panel. Currently, display signal wiring is mostly connected through the integrated circuit board, and touch signal wiring is connected through the flexible printed circuit.

[0003] However, as users' demand for display products increases, the internal wiring methods of display products also need to be improved. Summary of the invention

[0004] The purpose of the present application is to provide a touch display panel and a display device, aiming to solve the problem of poor wiring methods inside display products in traditional technologies.

[0005] A first aspect of an embodiment of the present application provides a touch display panel, comprising:

[0006] A control chip, wherein the control chip has an active surface, the active surface has a first side and a second side, and the first side is provided with a display signal contact and a touch signal contact;

[0007] A circuit board is arranged on a side of the control chip having an active surface;

[0008] a display signal wiring line, electrically connected to the display signal contact point, and the display signal wiring line extends out of the control chip along the first side;

[0009] a first touch signal trace electrically connected to the touch signal contact, the first touch signal trace having a first portion overlapping with a projection of the active surface on the circuit board, and a second portion extending beyond the projection of the active surface on the circuit board;

[0010] The first portion is arranged between a projection of the first side on the circuit board and a projection of the second side on the circuit board.

[0011] In some embodiments of the present application, a portion of the display signal wiring arranged outside the control chip and the second portion extend in the same direction.

[0012] In some embodiments of the present application, the first side and the second side are two adjacent sides on the active surface.

[0013] In some embodiments of the present application, the second side is one of the two sides adjacent to the first side and close to the display signal wiring.

[0014] In some embodiments of the present application, the first side is an output side of the active surface.

[0015] In some embodiments of the present application, the active surface further has a third side, the third side is opposite to the first side and is spaced apart, and the third side is the input side of the active surface;

[0016] A routing area for routing the first touch signal wire within the active surface is defined between the first side and the third side.

[0017] In some embodiments of the present application, the touch display panel further includes a second touch signal line, one end of the second touch signal line is electrically connected to an end of the first touch signal line away from the control chip;

[0018] The second touch signal line overlaps with the projection portion of the display signal line on the touch display panel, and a shielding layer is provided between the second touch signal line and the display signal line in the overlapping area.

[0019] In some embodiments of the present application, the shielding layer is a negative voltage signal layer in the touch display panel.

[0020] In some embodiments of the present application, the second touch signal routing line includes a first sub-signal routing line and a second sub-signal routing line, one end of the first sub-signal routing line is electrically connected to an end of the first touch signal routing line away from the control chip, and the other end of the first sub-signal routing line is electrically connected to the display screen of the touch display panel;

[0021] One end of the second sub-signal routing line is connected to a connection point between the first sub-signal routing line and the first touch signal routing line, and the other end of the second sub-signal routing line is provided with a signal test contact.

[0022] In some embodiments of the present application, the circuit board includes at least one conductive layer, and the first portion of the first touch signal trace that is disposed within the active surface is disposed within the at least one conductive layer;

[0023] And / or, the circuit board includes at least two conductive layers, and the first touch signal traces of the first portion disposed in the active surface are alternately disposed in the at least two conductive layers.

[0024] A second aspect of the present application further provides a display device, comprising the above-mentioned touch display panel.

[0025] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: in the above-mentioned touch display panel and display device, the touch display panel includes a control chip, a circuit board, a display signal wiring and a first touch signal wiring; the control chip has an active surface, the active surface has a first side and a second side, and the first side is provided with a display signal contact and a touch signal contact; the circuit board is provided on the side of the control chip having the active surface; the display signal wiring is electrically connected to the display signal contact, and the display signal wiring extends out of the control chip along the first side; the first touch signal wiring is electrically connected to the touch signal contact, and the first touch signal wiring has a projection intersection with the active surface on the circuit board The invention relates to a first part of the invention which is stacked on the circuit board, and a second part which extends out of the projection of the active surface on the circuit board; wherein the first part is arranged between the projection of the first side on the circuit board and the projection of the second side on the circuit board; in the present application, on the one hand, the touch signal contact is arranged on the active surface of the control chip, and the touch signal can be transmitted through the control chip, which is beneficial to improving the supply capacity of the touch signal; on the other hand, the first touch signal routing is arranged to be routed from the projection of the active surface on the circuit board to the second side, so that the first touch signal routing and the display signal routing extend from different sides of the control chip, which is beneficial to reducing the signal coupling between the display signal routing and the first touch signal routing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a touch display panel provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the structure of a touch display panel provided by a related technology of the present application;

[0028] Figure 3 A schematic diagram of the structure of a touch display panel provided by another related technology of the present application;

[0029] Figure 4 A schematic structural diagram of a touch display panel provided in another embodiment of the present application.

[0030] Explanation of specific element symbols: 1000-control chip, 100-active surface, 110-first side, 111-display signal contact, 112-touch signal contact, 120-second side, 130-third side, 140-routing area, 200-display signal routing, 300-first touch signal routing, 310-first part, 320-second part, 400-second touch signal routing, 410-first sub-signal routing, 420-second sub-signal routing, 500-signal test contact, a-first direction. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the terms "length", "width", "up", "down", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 a limitation on the present application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In the related art, the display signal wiring is often connected through an integrated circuit board to provide a display signal (such as an array signal or a GIP (Gate in Panel) signal), and the touch signal wiring is connected through a flexible circuit board to provide a touch signal (such as a TP signal). However, in a touch display panel using this wiring method, the supply capacity of the touch signal is relatively weak, resulting in low sensitivity of the touch function.

[0036] Based on this, the present application improves the related touch display panel and display device.

[0037] See also Figure 1 , Figure 1The structural schematic diagram of the touch display panel provided in the present embodiment is shown. The touch display panel of the present embodiment includes a control chip 1000, a circuit board, a display signal line 200 and a first touch signal line 300. The control chip 1000 has an active surface 100, the active surface 100 has a first side 110 and a second side 120, and a display signal contact 111 and a touch signal contact 112 are arranged on the first side 110; the circuit board is arranged on the side of the control chip having the active surface; the display signal line 200 is electrically connected to the display signal contact 111, and the display signal line 200 extends out of the control chip 1000 along the first side 110; the first touch signal line 300 is electrically connected to the touch signal contact 112, and the first touch signal line has a first part 310 overlapping with the projection of the active surface on the circuit board, and has a second part 320 extending outside the projection of the active surface on the circuit board; wherein the first part 310 is arranged between the projection of the first side on the circuit board and the projection of the second side on the circuit board.

[0038] It should be explained that the control chip 1000 (IC) in this embodiment is the core of the entire touch display panel, which is used to process display signals and touch signals. The active surface 100 generally refers to the surface of a circuit board or IC that contains active components. The first side 110 can be the output side (output) on the active surface 100 of the control chip 1000, and the display signal contact 111 on the output side is used to output the display signal, and the touch signal contact 112 on the output side is used to output the touch signal. The display signal wiring 200 is usually connected to the display screen to output the display signal so that the display screen displays image information. The first touch signal wiring 300 can output the TP signal.

[0039] It can be understood that in some embodiments of the present application, the touch signal contact 112 and the display signal contact 111 are co-arranged on the first side 110 of the active surface 100 of the control chip 1000, and the touch signal can be directly transmitted through the touch signal contact 112 of the control chip 1000, which is beneficial to improving the supply capacity of the touch signal.

[0040] In some related techniques, see Figure 2 , Figure 2 The structure diagram of the touch display panel provided by the related art is shown. The first touch signal line 300 and the display signal line 200 are both led out from the first side 110, and the first touch signal line and the display signal line are partially overlapped (such as Figure 2 The shaded part in the middle is the overlapping area. This is beneficial to improving the space utilization of the wiring structure. However, since the first touch signal line and the display signal line are close to each other and the first touch signal line and the display signal line are partially overlapped, there is a large signal coupling between the first touch signal line and the display signal line.

[0041] In other related techniques, see Figure 3 , Figure 3 The structure diagram of the touch display panel provided by the related art is shown. The first touch signal line 300 and the display signal line 200 are both led out from the first side 110, and the first touch signal line 300 is arranged around the display signal line 200. This can reduce the overlapping area of ​​the first touch signal line and the display signal line, which is conducive to reducing the signal coupling between the first touch signal line and the display signal line. However, this will increase the space occupied by the wiring structure (such as Figure 3 The upper and lower width dimensions are not conducive to the narrow frame design of the display panel.

[0042] It can be understood that in some embodiments of the present application, the first touch signal line 300 is arranged to be routed from the active surface 100 of the control chip 1000 in the projection area on the circuit board, and extends from a different side (the second side 120) of the active surface 100 from the display signal line 200. On the one hand, the distance between the first touch signal line 300 and the display signal line 200 is increased, which is beneficial to reduce the signal coupling between the first touch signal line 300 and the display signal line 200, and it is also possible not to increase the frame size of the touch display panel; on the other hand, the overlapping area between the first touch signal line 300 and the display signal line 200 is reduced, which is beneficial to reduce the signal coupling between the display signal line 200 and the first touch signal line 300, so as to improve the accuracy of the touch signal and the display signal.

[0043] In some embodiments of this application, please continue to refer to Figure 1 In this embodiment, the portion of the display signal wiring 200 disposed outside the control chip 1000 and the second portion 320 extend in the same direction.

[0044] It can be understood that the portion of the display signal wiring 200 and the second portion 320 disposed outside the control chip 1000 are both extended along the first direction a. This is beneficial to reducing the space occupied by the wiring.

[0045] In some embodiments, the display signal line 200 is used to output a GIP signal, and the first touch signal line 300 is used to output a TP signal.

[0046] In some embodiments of this application, please continue to refer to Figure 1 In this embodiment, the first side 110 and the second side 120 are two adjacent sides of the active surface 100 of the control chip 1000. In this way, other electrical connection contacts can be arranged on the other sides of the active surface 100 of the control chip 1000.

[0047] In some embodiments, the second side 120 may also be a side opposite to the first side 110 .

[0048] In some embodiments of this application, please continue to refer to Figure 1 In this embodiment, the second side 120 is one of the two sides adjacent to the first side 110 and close to the display signal trace 200. It can be understood that Figure 1 As shown, part of the display signal wiring 200 disposed outside the control chip 1000 extends in the first direction a, the second side 120 is on the left side of the active surface 100 of the control chip 1000, and the second side 120 is closer to the part of the display signal wiring 200 disposed outside the control chip 1000.

[0049] In some embodiments of the present application, the first side 110 is the output side of the active surface 100 of the control chip 1000. It can be understood that the signal output contacts of the active surface 100 of the control chip 1000 are all arranged on the output side.

[0050] In some embodiments of this application, please continue to refer to Figure 1 The active surface 100 of this embodiment also has a third side 130, which is opposite to the first side 110 and is spaced apart. The third side 130 is the input side of the active surface 100 of the control chip 1000; a routing area 140 for the first touch signal routing line 300 within the active surface 100 is defined between the first side 110 and the third side 130.

[0051] It is understandable that the third side 130 is the input side of the control chip 1000, and signals such as power signals, control signals, and data signals can enter the control chip 1000 through the third side 130. The first touch signal wiring 300 is routed in the wiring area 140 formed between the first side 110 and the third side 130, which is conducive to improving the space utilization rate in the display panel.

[0052] In some embodiments of this application, please refer to Figure 4 , Figure 4 The structure diagram of the touch display panel provided by the present embodiment is shown. The touch display panel of the present embodiment further includes a second touch signal line 400, one end of the second touch signal line 400 is electrically connected to the end of the first touch signal line 300 away from the control chip 1000; the second touch signal line 400 overlaps with the projection of the display signal line 200 on the touch display panel, and is located in the overlapping area (such as Figure 4 A shielding layer is disposed between the second touch signal wiring 400 (the shaded portion in the middle is an overlapping area) and the display signal wiring 200.

[0053] It is understandable that the touch signal is output by the control chip 1000 and output to the touch signal execution device via the first touch signal line 300 and the second touch signal line 400. Since the second touch signal line 400 needs to continue to transmit the touch signal, it is inevitable that the second touch signal line 400 overlaps with the display signal line 200. In some embodiments of the present application, a shielding layer is provided between the second touch signal line 400 and the display signal line 200 located in the overlapping area. The shielding layer can shield the signal coupling between the second touch signal line 400 and the display signal line 200, thereby facilitating improving the accuracy of the touch signal and the display signal.

[0054] In some embodiments of the present application, the shielding layer is a negative voltage signal layer in the touch display panel. The negative voltage signal layer may be an ELVSS signal wiring layer.

[0055] It is understandable that the main function of the shielding layer is to isolate and block the electromagnetic field to reduce the interference between different signal traces. When the negative voltage signal layer is used as a shielding layer, the shielding layer can not only provide a physical barrier, but also further reduce electromagnetic interference by maintaining a stable potential difference.

[0056] In some embodiments of this application, please continue to refer to Figure 4 The second touch signal line 400 of the present embodiment includes a first sub-signal line 410 and a second sub-signal line 420. One end of the first sub-signal line 410 is electrically connected to an end of the first touch signal line 300 away from the control chip 1000, and the other end of the first sub-signal line 410 is electrically connected to the display screen of the touch display panel; one end of the second sub-signal line 420 is connected to the connection point between the first sub-signal line 410 and the first touch signal line 300, and the other end of the second sub-signal line 420 is provided with a signal test contact 500.

[0057] It is understood that the main function of the first sub-signal line 410 is to transmit the touch signal to the display screen or the touch sensor array to realize the detection and response of the touch function. The main function of the second sub-signal line 420 is to provide a signal test contact 500. This contact can be used to test and calibrate the touch signal during the manufacturing process or during product maintenance to ensure the normal operation of the touch display panel.

[0058] In some embodiments of the present application, the circuit board includes at least one conductive layer, and the first portion 310 is disposed in the at least one conductive layer.

[0059] It is understandable that the first touch signal line 300 can be set in the M1 layer, which is the first layer of the horizontal metal connection lines on the active surface 100 for realizing circuit connection. In a touch display panel, if the signal line is directly exposed to the air or in contact with water vapor, it is easy to corrode, resulting in a decrease in signal transmission quality or even failure. In the embodiment of the present application, the first touch signal line 300 is set in the conductive layer, which is conducive to reducing the corrosion of the first touch signal line due to water vapor intrusion.

[0060] In some embodiments of the present application, the circuit board includes at least two conductive layers, and the first parts 310 are alternately arranged in the at least two conductive layers.

[0061] It is understandable that the first touch signal lines 300 can be alternately arranged in the M1 and M2 layers. The M2 layer is also a layer of lateral metal connection lines used to realize circuit connection inside the control chip 1000, and is usually arranged on one side of the M1 layer. The M1 layer and the M2 layer are connected through vertical through holes. The first touch signal lines 300 alternately arranged in different layers can avoid other signal lines in the M1 layer and the M2 layer to improve the reliability of the touch signal.

[0062] In some embodiments, the first touch signal trace 300 and the output and input of the control signal are arranged in the same conductive layer.

[0063] Furthermore, in order to better implement the display panel in any of the above embodiments, based on the above display panel, the present application also provides a display device, including the above display panel.

[0064] In some embodiments, the display device may be a mobile phone, a tablet, a desktop computer, a laptop computer, a wearable device, a car screen, a sensor device, etc.

[0065] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0066] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0067] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0068] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more embodiments of the invention, in the above description of the embodiments of this application, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0069] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A touch display panel, characterized in that: include: A control chip, wherein the control chip has an active surface, the active surface has a first side and a second side, and the first side is provided with a display signal contact and a touch signal contact; A circuit board is arranged on a side of the control chip having an active surface; a display signal wiring line, electrically connected to the display signal contact point, and the display signal wiring line extends out of the control chip along the first side; a first touch signal trace electrically connected to the touch signal contact, the first touch signal trace having a first portion overlapping with a projection of the active surface on the circuit board, and a second portion extending beyond the projection of the active surface on the circuit board; The first portion is arranged between a projection of the first side on the circuit board and a projection of the second side on the circuit board.

2. The touch display panel according to claim 1, characterized in that: The portion of the display signal wiring arranged outside the control chip and the second portion are extended in the same direction.

3. The touch display panel according to claim 2, characterized in that: The first side and the second side are two adjacent sides on the active surface.

4. The touch display panel according to claim 3, characterized in that: The second side is one of the two sides adjacent to the first side and close to the display signal wiring.

5. The touch display panel according to claim 3, characterized in that: The first side is an output side of the active surface.

6. The touch display panel according to claim 5, characterized in that: The active surface further has a third side, the third side is opposite to the first side and is spaced apart, and the third side is the input side of the active surface; A routing area for routing the first touch signal wire within the active surface is defined between the first side and the third side.

7. The touch display panel according to claim 1, characterized in that: The touch display panel further includes a second touch signal wiring, one end of the second touch signal wiring is electrically connected to an end of the first touch signal wiring away from the control chip; The second touch signal line overlaps with the projection part of the display signal line on the touch display panel, and a shielding layer is provided between the second touch signal line and the display signal line in the overlapping area; Preferably, the shielding layer is a negative voltage signal layer in the touch display panel.

8. The touch display panel according to claim 7, characterized in that: The second touch signal routing line includes a first sub-signal routing line and a second sub-signal routing line, one end of the first sub-signal routing line is electrically connected to an end of the first touch signal routing line away from the control chip, and the other end of the first sub-signal routing line is electrically connected to the display screen of the touch display panel; One end of the second sub-signal routing line is connected to a connection point between the first sub-signal routing line and the first touch signal routing line, and the other end of the second sub-signal routing line is provided with a signal test contact.

9. The touch display panel according to any one of claims 1 to 8, characterized in that: The circuit board comprises at least one conductive layer, and the first portion is arranged in the at least one conductive layer; And / or, the circuit board includes at least two conductive layers, and the first parts are alternately arranged in the at least two conductive layers.

10. A display device, characterized in that: A touch display panel comprising any one of claims 1 to 9.

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