Display panel, display device, preparation method and touch detection method

Abstract

The invention relates to a display panel, a display device, a preparation method and a touch detection method.The display panel comprises a substrate, a touch layer and a signal layer, the touch layer is arranged on one side of the substrate and electrically connected with a touch chip, and the signal layer is arranged on one side of the substrate and electrically connected with the touch chip; and the signal layer is also used for detecting the interference signal and transmitting the interference signal to the touch chip, so that the touch chip outputs a counteracting signal for counteracting the interference signal to the signal layer according to the interference signal. The display panel provided by the invention can eliminate crosstalk between the touch signal and the display signal and improve the display effect.

Description

Technical Field

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

[0002] With the development of society and the advancement of technology, touch screen displays have become an indispensable part of modern electronic devices. A touch screen display includes a touch layer and a display layer. The touch layer is used to receive the user's touch operation and convert it into an electrical signal, and the display layer is used to convert the electrical signal into a visual image to present to the user.

[0003] In the conventional technology, due to the requirement of transmittance, the isolation column needs to be hollowed out in the camera hole area, and the hollowed-out area will cause the problem of crosstalk between the touch signal and the display signal. Summary of the invention

[0004] Based on this, it is necessary to provide a display panel, a display device, a preparation method and a touch detection method that can solve the problem of crosstalk between touch signals and display signals in order to solve the above technical problems.

[0005] In a first aspect, an embodiment of the present application provides a display panel, including:

[0006] substrate;

[0007] The touch layer is disposed on one side of the substrate and is electrically connected to the touch chip;

[0008] The signal layer is disposed on one side of the substrate and is electrically connected to the touch chip;

[0009] The signal layer is used to detect interference signals and transmit the interference signals to the touch control chip, so that the touch control chip outputs a cancellation signal for canceling the interference signals to the signal layer according to the interference signals.

[0010] In one of the embodiments, the touch layer includes a plurality of first touch electrodes and a plurality of second touch electrodes;

[0011] Adjacent first touch electrodes and / or adjacent second touch electrodes are connected via bridges;

[0012] Optionally, multiple bridge and signal layers are located on the same layer;

[0013] Optionally, the signal layer is used to detect the interference signal and transmit the interference signal to the touch chip, so that the touch chip outputs a cancellation signal with a level opposite to the interference signal to the signal layer according to the interference signal;

[0014] Optionally, the absolute value of the cancellation signal is less than or equal to the absolute value of the interference signal.

[0015] In one embodiment, the signal layer includes a plurality of first signal electrode groups and a plurality of second signal electrode groups;

[0016] A plurality of first signal electrode groups are arranged at intervals along a first direction and are electrically connected to a data transmission terminal of the touch chip, and each first signal electrode group includes a plurality of first signal electrodes arranged along a second direction;

[0017] A plurality of second signal electrode groups are arranged at intervals along the second direction and are electrically connected to the data transmission end of the touch chip, and each second signal electrode group includes a plurality of second signal electrodes arranged along the first direction;

[0018] The first direction and the second direction intersect and are both perpendicular to the thickness direction of the touch layer;

[0019] Optionally, in the same second signal electrode group, each second signal electrode is located between two adjacent first signal electrode groups and is electrically connected to one of the two adjacent first signal electrode groups;

[0020] Optionally, in the same second signal electrode group, two adjacent second signal electrodes are electrically connected to different first signal electrode groups, respectively.

[0021] In one embodiment, the touch layer includes a plurality of first touch electrode chains and a plurality of second touch electrode chains;

[0022] A plurality of first touch electrode chains are arranged at intervals along a first direction and are all electrically connected to a data receiving end of the touch chip; each first touch electrode chain includes a plurality of first touch electrodes arranged and electrically connected along a second direction;

[0023] A plurality of second touch electrode chains are arranged at intervals along the second direction and are all electrically connected to the data transmission end of the touch chip; each second touch electrode chain includes a plurality of second touch electrodes arranged along the first direction and electrically connected.

[0024] In one embodiment, the plurality of first touch electrode chains and the plurality of second touch electrode chains are located in the same layer;

[0025] Optionally, each of the first touch electrode chain and the second touch electrode chain is electrically connected to the touch chip via lead-out wiring.

[0026] In one embodiment, the plurality of first signal electrode groups correspond to the plurality of first touch electrode chains, and the plurality of second signal electrode groups correspond to the plurality of second touch electrode chains;

[0027] Optionally, the pattern of the first touch electrode is the same as the pattern of the first signal electrode;

[0028] Optionally, the pattern of the second touch electrode is the same as the pattern of the second signal electrode;

[0029] Optionally, the pattern of the first touch electrodes and the pattern of the first signal electrodes include quadrilaterals;

[0030] Optionally, the pattern of the second touch electrodes and the pattern of the second signal electrodes include quadrilaterals.

[0031] In one embodiment, the plurality of first signal electrode groups and the plurality of second signal electrode groups are electrically connected to the data transmission end of the touch control chip through a flexible circuit board.

[0032] In one embodiment, the display panel further comprises:

[0033] A display layer is arranged on a side of the signal layer close to the substrate; the display layer includes a plurality of light-emitting elements arranged at intervals;

[0034] The display panel further includes an isolation structure, the isolation structure encloses a plurality of isolation openings, and the plurality of light emitting elements are arranged corresponding to the plurality of isolation openings;

[0035] Optionally, the light emitting element comprises a first electrode, a light emitting portion and a second electrode stacked in a direction away from the substrate, and the second electrode is electrically connected to the isolation structure;

[0036] Optionally, the signal layer is disposed on a side of the touch layer close to the substrate.

[0037] In one embodiment, the display panel has a display area and a hole area adjacent to the display area;

[0038] The touch layer and the signal layer are both arranged in the display area and are arranged around the hole area.

[0039] In one of the embodiments, the display panel further includes a hollow region disposed in the same layer as the second electrode, and an orthographic projection of at least part of the signal layer on the substrate overlaps with an orthographic projection of the hollow region on the substrate;

[0040] Optionally, the orthographic projection of the hollow area on the substrate is located within the range of the orthographic projection of the signal layer on the substrate.

[0041] In a second aspect, an embodiment of the present application provides a display device, comprising the display panel and touch chip provided in the first aspect above; the display panel is electrically connected to the touch chip via a flexible circuit board.

[0042] In a third aspect, an embodiment of the present application provides a touch detection method, the method comprising:

[0043] receiving interference signals detected by the signal layer;

[0044] A cancellation signal is output to the signal layer according to the interference signal; the cancellation signal is used to cancel the interference signal.

[0045] In one of the embodiments, the interference signal detected by the receiving signal layer includes:

[0046] receiving data detected by the signal layer and determining coupling capacitance according to the data;

[0047] Optionally, before receiving the interference signal detected by the signal layer, the method further includes:

[0048] Set the initial operating parameters of the signal layer, which include voltage and frequency.

[0049] In a fourth aspect, an embodiment of the present application further provides a method for preparing a display panel, the method comprising:

[0050] providing a substrate;

[0051] forming a signal layer and a touch layer on one side of the substrate;

[0052] The touch layer is electrically connected to the touch chip, the signal layer is electrically connected to the touch chip, and is used to detect interference signals and transmit the interference signals to the touch chip, so that the touch chip outputs a cancellation signal to the signal layer to cancel the interference signal according to the interference signal.

[0053] In one embodiment, a signal layer touch layer is formed on one side of a substrate, including:

[0054] Forming a first metal material layer on the substrate, and patterning the first metal material layer to form a plurality of bridges and signal layers;

[0055] A second metal material layer is formed on the first metal material layer, and the second metal material layer is patterned to form a touch layer.

[0056] The embodiment of the present application provides a display panel, a display device, a preparation method and a touch detection method, wherein the display panel includes a substrate, a touch layer and a signal layer, wherein the touch layer is arranged on one side of the substrate and is electrically connected to a touch chip, and the signal layer is arranged on one side of the substrate and is electrically connected to the touch chip. In this way, the signal layer can detect the interference signal generated by the touch layer on the display layer, and transmit the interference signal to the touch chip electrically connected thereto; the touch chip can output a cancellation signal to the signal layer to cancel the interference signal according to the received interference signal, thereby eliminating the interference generated by the touch layer on the display layer, and further improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For different technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0058] Figure 1 A schematic diagram of a display panel provided by an embodiment;

[0059] Figure 2 A partial schematic diagram of a hole-digging area provided in one embodiment;

[0060] Figure 3 A schematic diagram of the structure of a display panel provided by an embodiment;

[0061] Figure 4 A schematic structural diagram of a display panel provided in another embodiment;

[0062] Figure 5 A schematic diagram of a partial structure of a display panel provided by an embodiment;

[0063] Figure 6 A schematic diagram of a partial structure of a display panel provided in another embodiment;

[0064] Figure 7 A schematic structural diagram of a display panel provided in another embodiment;

[0065] Figure 8 A schematic diagram of a partial structure of a display panel provided in another embodiment;

[0066] Fig. 9 A schematic cross-sectional structure diagram of a display panel provided in another embodiment;

[0067] Fig.10 A schematic cross-sectional structure diagram of a display panel provided in another embodiment;

[0068] Fig.11 A schematic diagram of the structure of a display device provided by an embodiment;

[0069] Fig.12 A schematic diagram of a step flow of a touch detection method provided by an embodiment;

[0070] Fig.13 A schematic diagram of a touch signal and a cancellation signal provided by an embodiment;

[0071] Fig.14 A schematic diagram of an interference signal and a cancellation signal provided by an embodiment;

[0072] Fig.15 A schematic flow chart of steps of a method for preparing a display panel provided in an embodiment;

[0073] Fig.16 A schematic flow chart of the steps of a method for preparing a display panel provided in another embodiment.

[0074] Description of reference numerals:

[0075] 1. Operable area; 2. Screen cutting area; 3. VA inner ring; 4. VA outer ring; 5. Ink layer; 6. Optical adhesive layer; 7. Polarizer; 8. First insulating layer; 9. Second insulating layer; 10. Display panel; 11. Substrate; 12. Touch layer; 13. Signal layer; 131. First signal electrode group; 132. Second signal electrode group; 131a. First signal electrode; 132a. Second signal electrode; 14. Flexible circuit board; 121. First touch electrode chain; 122. Second touch electrode chain; 121a. First touch electrode; 122a. Second touch electrode; 15. Bridge; 16. Lead-out wiring; 20. Touch chip; 17. Display layer; 23. Display area; 24. Hole-digging area; 30. Display device; 1311. First connecting member; 1322. Second connecting member; 19. Hollow area; 18. Second electrode. DETAILED DESCRIPTION

[0076] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0077] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, they do not represent any order, quantity or importance, but are only used to distinguish different components. These terms are only used to distinguish one element from another. For example, without departing from the scope of the present application, the first element may be referred to as the second element, and similarly, the second element may be referred to as the first element. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0078] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0079] With the development of society and the advancement of science and technology, touch screen displays have become an indispensable part of modern electronic devices. The touch screen display includes a touch layer and a display layer. The touch layer is used to receive the user's touch operation and convert it into an electrical signal, and the display layer is used to convert the electrical signal into a visual image and present it to the user. The related technology abandons FMM (Fine Metal Mask) and adopts a patterning process to produce luminous pixels, which can improve the PPI (pixels per inch, image resolution) of the display panel. However, the technical solution of using a patterning process to produce luminous pixels requires the isolation structure in the display panel to be hollowed out in the camera hole area of ​​the display panel due to the transmittance requirements. The structure of the display panel, such as Figure 1 and Figure 2 As shown, the display panel includes a display area 23 and a hole area 24 . Figure 2 for Figure 1 A partial schematic diagram of the middle hole area 24, the hole area 24 includes an operable area 1 (Active Area, AA), a screen cut area 2 corresponding to the isolation structure hole area, and a visible area (View Area, VA), and the visible area includes a VA inner circle 3 and a VA outer circle 4. There is no cathode shielding in the hole area 24, which is very likely to increase the coupling capacitance between the touch layer and the display layer in the display panel, thereby causing the problem of crosstalk between the touch signal and the display signal. For example, when the touch is not powered on, the current waveform of the display signal is normal without prominent ripples. After the touch is powered on, the display signal will have prominent ripples due to the problem of crosstalk.

[0080] In view of this, the embodiments of the present application provide a display panel, a display device, a preparation method and a touch detection method, by setting a display panel including a signal layer, the signal layer is set on the side of the substrate and electrically connected to the touch chip; in this way, the signal layer can detect the interference signal generated by the touch layer to the display layer, and transmit the interference signal to the touch chip electrically connected thereto; the touch chip can output a cancellation signal to the signal layer to cancel the interference signal according to the received interference signal, thereby eliminating the interference generated by the touch layer to the display layer, and further improving the display effect of the display panel.

[0081] Patents CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 099419, and PCT / CN2024 / 099072 record relevant technical solutions for isolation structures, and their contents are incorporated into this application by reference for reference.

[0082] See also Figure 3 One embodiment of the present application provides a display panel 10, which includes a substrate (not shown in the figure), a touch layer 12 and a signal layer 13. The touch layer 12 is disposed on one side of the substrate and is electrically connected to the touch chip 20; the signal layer 13 is disposed on one side of the substrate and is electrically connected to the touch chip 20. It can be understood that the signal layer 13 can be disposed on a side of the substrate close to the touch layer 12, or on a side of the touch layer 12 away from the substrate.

[0083] The substrate may be an inorganic material substrate, an organic material substrate, or a composite substrate formed by stacking an inorganic material substrate and an organic material substrate. This embodiment does not limit the material and structure of the substrate, as long as it can achieve its function.

[0084] The touch layer 12 is used to receive the user's touch operation and convert it into an electrical signal, and the touch layer 12 transmits the electrical signal to the touch chip 20; the touch chip 20 converts the received electrical signal into a visual image and displays it through the display layer.

[0085] The user's touch operation on the touch layer 12 generates an interference signal, which can be detected by the signal layer 13 and transmitted to the touch chip 20. The touch chip 20 outputs a cancellation signal to the signal layer 13 according to the received interference signal, and the cancellation signal can cancel the interference signal generated by the touch layer 12.

[0086] It should be noted that the touch signal detected by the signal layer 13 includes an electrical signal generated by the user's touch operation, that is, a target touch signal, and an interference signal generated by the coupling capacitance between the touch layer 12 and the display layer. After receiving the signal detected by the signal layer 13, the touch chip 20 analyzes the detected signal, determines the interference signal, and outputs a cancellation signal to the signal layer 13 that can cancel the interference signal.

[0087] The display panel 10 provided in the embodiment of the present application includes a substrate, a touch layer 12 and a signal layer 13. The touch layer 12 is arranged on one side of the substrate and is electrically connected to the touch chip 20. The signal layer 13 is arranged on one side of the substrate and is electrically connected to the touch chip 20. In this way, the signal layer 13 can detect the interference signal generated by the touch layer 12 on the display layer, and transmit the interference signal to the touch chip 20 electrically connected thereto; the touch chip 20 can output a cancellation signal to the signal layer 13 to cancel the interference signal according to the received interference signal, thereby eliminating the interference generated by the touch layer 12 on the display layer, and further improving the display effect of the display panel 10.

[0088] See also Figure 4 The signal layer 13 includes a plurality of first signal electrode groups 131 and a plurality of second signal electrode groups 132. There is no limitation on the number of the first signal electrode groups 131 and the second signal electrode groups 132, as long as the functions thereof can be achieved.

[0089] The plurality of first signal electrode groups 131 are arranged at intervals along the first direction X and are electrically connected to the data transmission end of the touch control chip 20 . Each first signal electrode group 131 includes a plurality of first signal electrodes 131 a arranged along the second direction Y.

[0090] The plurality of second signal electrode groups 132 are arranged along the second direction Y at intervals. Each second signal electrode group 132 includes a plurality of second signal electrodes 132 a arranged along the first direction X.

[0091] The first direction X and the second direction Y intersect and are both perpendicular to the thickness direction of the touch layer 12 .

[0092] by Figure 4 Taking the orientation in as an example, the first direction X is the horizontal direction, the second direction Y is the vertical direction, the first direction X and the second direction Y are perpendicular to each other, and both are perpendicular to the thickness direction of the touch layer 12. The plurality of first signal electrode groups 131 in the signal layer 13 are arranged at intervals in the vertical direction, and the plurality of second signal electrode groups 132 are arranged at intervals in the horizontal direction. Each first signal electrode group 131 includes a plurality of first signal electrodes 131a arranged in the horizontal direction and electrically connected, and each second signal electrode group 132 includes a plurality of second signal electrodes 132a arranged in the vertical direction.

[0093] In an optional embodiment, two adjacent first signal electrodes 131 a are electrically connected using a first connecting member 1311 .

[0094] In an optional embodiment, the plurality of second signal electrodes 132 a in each second signal electrode group 132 are electrically connected.

[0095] In this embodiment, the signal layer 13 includes multiple first signal electrode groups 131 and multiple second signal electrode groups 132. The multiple first signal electrode groups 131 and the multiple second signal electrode groups 132 have a simple structure and are easy to arrange. The cancellation signal output by the touch chip 20 can offset the interference signal generated by the touch layer 12, thereby improving the display effect of the display panel 10.

[0096] In an optional embodiment, the signal layer 13 includes multiple signal electrode groups, each signal electrode group includes multiple electrically connected signal electrodes, two adjacent signal electrode groups are staggered and electrically connected, or multiple signal electrode groups are electrically connected in sequence.

[0097] Please continue to see Figure 4 In one embodiment, the plurality of first signal electrode groups 131 and the plurality of second signal electrode groups 132 are electrically connected to the data transmission terminal TX of the touch control chip 20 through the flexible printed circuit board (PFC) 14 .

[0098] It can be understood that the plurality of first signal electrode groups 131 are directly electrically connected to the data transmission terminal TX of the touch chip 20, and the plurality of second signal electrode groups 132 are directly electrically connected to the data transmission terminal TX of the touch chip 20. Alternatively, the plurality of first signal electrode groups 131 are electrically connected to the plurality of second signal electrode groups 132 and then electrically connected to the data transmission terminal TX of the touch chip 20.

[0099] In one embodiment, Figure 5 As shown, in the same second signal electrode group 132 , each second signal electrode 132 a is located between two adjacent first signal electrode groups 131 , and is electrically connected to one first signal electrode group 131 between the two adjacent first signal electrode groups 131 .

[0100] That is, for each second signal electrode group 132 , a second signal electrode 132 a is provided between two adjacent first signal electrode groups 131 , and the second signal electrode 132 a can be electrically connected to any one of the two adjacent first signal electrode groups 131 .

[0101] Optionally, the second signal electrode 132 a is electrically connected to two adjacent first signal electrode groups 131 .

[0102] Optionally, the second signal electrode 132 a is electrically connected to any one of two adjacent first signal electrode groups 131 via a second connecting member 1322 .

[0103] In one embodiment, Figure 6As shown, in the same second signal electrode group 132 , two adjacent second signal electrodes 132 a are electrically connected to different first signal electrode groups 131 , respectively.

[0104] That is, for each second signal electrode group 132 , two adjacent second signal electrodes 132 a in the second signal electrode group 132 are electrically connected to adjacent first signal electrode groups 131 , respectively, and the two second signal electrodes 132 a are electrically connected to different first signal electrode groups 131 .

[0105] The various electrical connection modes of the first signal electrode groups 131 and the second signal electrode groups 132 in the signal layer 13 provided in the above embodiments facilitate users to set them according to actual conditions, so that the display panel 10 has higher practicality.

[0106] See also Figure 7 In one embodiment, the touch layer 12 includes a plurality of first touch electrode chains 121 and a plurality of second touch electrode chains 122. There is no limitation on the number of the first touch electrode chains 121 and the second touch electrode chains 122, as long as their functions can be achieved.

[0107] The plurality of first touch electrode chains 121 are arranged at intervals along the first direction X and are all electrically connected to the data receiving terminal RX of the touch chip 20; the plurality of first touch electrode chains 121 include a plurality of first touch electrodes 121a arranged along the second direction Y and electrically connected;

[0108] The plurality of second touch electrode chains 122 are arranged at intervals along the second direction and are all electrically connected to the data transmission terminal TX of the touch chip 20; the plurality of second touch electrode chains 122 include a plurality of second touch electrodes 122a arranged along the first direction X and electrically connected;

[0109] The first direction X and the second direction Y intersect and are both perpendicular to the thickness direction of the touch layer 12 .

[0110] by Figure 7 For example, the first direction X is a horizontal direction, the second direction Y is a vertical direction, the first direction X and the second direction Y are perpendicular to each other, and both are perpendicular to the thickness direction of the touch layer 12. The plurality of first touch electrode chains 121 in the touch layer 12 are arranged at intervals along the vertical direction, and are all electrically connected to the data receiving terminal RX of the touch chip 20. Each first touch electrode chain 121 includes a plurality of first touch electrodes 121a, and the plurality of first touch electrodes 121a are arranged along the horizontal direction and are electrically connected in sequence.

[0111] Optionally, the plurality of first touch electrodes 121 a are electrically connected via a connector.

[0112] The plurality of second touch electrode chains 122 in the touch layer 12 are arranged horizontally at intervals and are electrically connected to the data transmission terminal TX of the touch chip 20. Each second touch electrode chain 122 includes a plurality of second touch electrodes 122a, which are arranged vertically and electrically connected in sequence.

[0113] In one embodiment, when the plurality of first touch electrode chains 121 and the plurality of second touch electrode chains 122 are located in different layers, the plurality of first touch electrodes 121a in each first touch electrode chain 121 are directly electrically connected, and the plurality of second touch electrodes 122a in each second touch electrode chain 122 are directly electrically connected.

[0114] In another embodiment, when the plurality of first touch electrode chains 121 and the plurality of second touch electrode chains 122 are located in the same layer, the display panel 10 further includes a plurality of bridges 15 arranged on one side of the first touch electrode chains 121 and the second touch electrode chains 122, and each bridge 15 electrically connects two adjacent second touch electrodes 122a.

[0115] That is, a plurality of bridges 15 are provided on the side of the touch layer 12 close to the display layer, a plurality of first touch electrodes 121a in each first touch electrode chain 121 are directly electrically connected, and two adjacent second touch electrodes 122a in a plurality of second touch electrodes 122a in each second touch electrode chain 122 are electrically connected via the bridge 15. In this way, electrical connection between the plurality of first touch electrode chains 121 and the second touch electrode chains 122 can be avoided.

[0116] In an optional embodiment, each first touch electrode chain 121 and each second touch electrode chain 122 are electrically connected to the touch chip 20 via a lead-out wiring 16 .

[0117] In an optional embodiment, the touch layer 12 includes a plurality of first touch electrodes 121a and a plurality of second touch electrodes 122a. The adjacent first touch electrodes 121a may be electrically connected via a bridge 15, and the adjacent second touch electrodes 122a may be connected via a connector; the adjacent first touch electrodes 121a may be connected via a connector, and the adjacent second touch electrodes 122a may be connected via a bridge 15; the adjacent first touch electrodes 121a may be electrically connected via a bridge 15, and the adjacent second touch electrodes 122a may also be connected via a bridge 15. The adjacent first touch electrodes 121a may be touch electrodes in different first touch electrode chains 121, and the adjacent second touch electrodes 122a may be touch electrodes in different second touch electrode chains 122.

[0118] In one embodiment, Figure 8As shown, when the display panel 10 includes a plurality of bridges 15, the plurality of bridges 15 and the signal layer 13 are located in the same layer, and the bridges 15 are not connected to each signal electrode in the signal layer 13. Each second touch electrode chain 122 is electrically connected to the data transmission terminal TX of the touch chip 20 through the plurality of bridges 15.

[0119] The above-mentioned embodiments provide a setting method of multiple first touch electrode chains 121 and multiple second touch electrode chains 122 in the touch layer 12, and an electrical connection method of multiple first touch electrodes 121a in the multiple first touch electrode chains 121 and multiple second touch electrodes 122a in the multiple second touch electrode chains 122, which is convenient for users to set according to actual conditions, so that the display panel 10 has higher practicality.

[0120] In one embodiment, when the multiple first touch electrode chains 121 and the multiple second touch electrode chains 122 are located in the same layer, and the signal layer 13 and the multiple bridges 15 are located in the same layer, the multiple first signal electrode groups 131 correspond to the multiple first touch electrode chains 121, and the multiple second signal electrode groups 132 correspond to the multiple second touch electrode chains 122.

[0121] That is, the orthographic projections of the first touch electrode chains 121 on the signal layer 13 overlap with the first signal electrode groups 131 , and the orthographic projections of the second touch electrode chains 122 on the signal layer 13 overlap with the second signal electrode groups 132 .

[0122] It can be understood that the patterns of each first touch electrode 121a in each first touch electrode chain 121 and each second touch electrode 122a in each second touch electrode chain 122 are the same. The patterns of each first signal electrode 131a in each first signal electrode group 131 and each second signal electrode 132a in each second signal electrode group 132 are the same. The pattern of each touch electrode in the touch layer 12 is the same as the pattern of each signal electrode in the signal layer 13. Optionally, the patterns of the touch electrodes and the signal electrodes include quadrilaterals.

[0123] In an optional embodiment, the pattern of the touch electrodes is a rhombus. Alternatively, the pattern of the touch electrodes may be any one of a triangle, a square, a rectangle, a parallelogram, a trapezoid, and other irregular shapes.

[0124] In an optional embodiment, the pattern of the signal electrode is a rhombus. Optionally, the pattern of the touch electrode can be any one of a triangle, a square, a rectangle, a parallelogram, a trapezoid and other irregular shapes.

[0125] In this embodiment, the pattern of the touch layer 12 (i.e., the pattern of the touch electrodes in the touch layer 12) is the same as the pattern of the signal layer 13 (i.e., the pattern of the signal electrodes in the signal layer 13). This can improve the preparation efficiency and facilitate the signal layer 13 to detect interference signals, thereby improving the effect of canceling the interference signals, and further improving the display effect of the display panel 10.

[0126] See also Fig. 9 In one embodiment, the display panel 10 further includes a display layer 17 , which is disposed on a side of the signal layer 13 close to the substrate 11 , and includes a plurality of light emitting elements disposed at intervals.

[0127] The display panel 10 further includes an isolation structure, which encloses a plurality of isolation openings, and the plurality of light emitting elements are disposed corresponding to the plurality of isolation openings.

[0128] That is to say, the display panel 10 also includes an isolation structure with multiple isolation openings and multiple light-emitting elements. The isolation structure is arranged on the side of the substrate 11 close to the display layer 17. One light-emitting element is arranged corresponding to one isolation opening, or one isolation opening is arranged with at least two light-emitting elements, or there is an isolation opening without a light-emitting element.

[0129] In an optional embodiment, the light emitting element includes a first electrode, a light emitting portion, and a second electrode stacked in a direction away from the substrate 11 , and the second electrode is electrically connected to the isolation structure.

[0130] That is, in the isolation opening of the isolation structure, a first electrode (anode), a light-emitting portion, and a second electrode (cathode) are sequentially stacked, and the second electrode is electrically connected to the isolation structure. The light-emitting portions arranged in different isolation openings may be different, that is, the light-emitting portion may include multiple types of light-emitting portions, for example, the light-emitting portion may include three types of light-emitting portions for emitting light of different colors, namely, a first light-emitting portion, a second light-emitting portion, and a third light-emitting portion.

[0131] In this embodiment, the isolation structure is provided without the need for a mask plate, thereby improving the image resolution and service life of the display panel 10 .

[0132] In one embodiment, Figure 1 As shown, the display panel 10 has a display area 23 and a hole area 24 adjacent to the display area 23. The hole area 24 is used to set a camera of the display. The hole area 24 can be set in the display area 23, or can be set outside the display area 23 and connected to the display area 23. This embodiment does not limit the setting positions of the hole area 24 and the display area 23, and the user can set them according to actual applications.

[0133] The touch layer 12 and the signal layer 13 are both disposed in the display area 23 and are disposed around the hole area 24 .

[0134] In this embodiment, a signal layer 13 is provided around the hole area 24 in the display panel 10 . The interference signal can be detected through the signal layer 13 , so that the touch chip 20 sends a cancellation signal to the signal layer 13 to cancel the interference signal, thereby improving the display effect of the display panel 10 .

[0135] In an optional embodiment, the cross-sectional view of the display panel 10 is as follows: Fig.10 As shown, the display panel 10 includes an ink layer 5, an optical adhesive layer 6, a polarizer 7, a first insulating layer 8, a second insulating layer 9, a touch layer 12, a signal layer 13, a hole-digging area 24, and a second electrode 18. Among them, the area formed by the ink layer 5 on the side close to the hole-digging area 24 corresponds to the VA inner circle 3, the area formed by the ink layer 5 on the side away from the hole-digging area 24 corresponds to the VA outer circle 4, the area formed by the optical adhesive layer 6, the polarizer 7, the first insulating layer 8, the second insulating layer 9, and the second electrode 18 on the side close to the hole-digging area 24 corresponds to the screen cutting area 2, and the area formed by the optical adhesive layer 6, the polarizer 7, the first insulating layer 8, the second insulating layer 9, and the second electrode 18 on the side away from the hole-digging area 24 corresponds to the operable area 1.

[0136] Please continue to see Fig.10 In one embodiment, the display panel 10 further includes a hollow region 19 disposed in the same layer as the second electrode 18 , and an orthographic projection of at least part of the signal layer 13 on the substrate 11 overlaps with an orthographic projection of the hollow region 19 on the substrate 11 .

[0137] It can be understood that the hollow area 19 refers to an area without the second electrode 18, and the signal layer 13 is set at a position corresponding to the hollow area 19 in the second insulating layer 9. Among them, the orthographic projection of part of the signal layer 13 on the substrate 11 overlaps with the orthographic projection of the hollow area 19 on the substrate 11, that is, part of the hollow area 19 may be a signal layer 13 corresponding to the setting.

[0138] In this embodiment, a hollow area 19 is provided in the same layer as the second electrode 18, that is, there is no second electrode 18 shielding. By setting the signal layer 13 in the area corresponding to the hollow area 19 in the second insulating layer 9, the interference of the touch layer 12 on the display layer 17 can be eliminated, thereby improving the display effect of the display panel 10.

[0139] In an optional embodiment, the orthographic projection of the hollow area 19 on the substrate 11 is located within the range of the orthographic projection of the signal layer 13 on the substrate 11 .

[0140] That is to say, the outer contour of the orthographic projection of the hollow area 19 on the substrate 11 is located within the range of the outer contour of the orthographic projection of the signal layer 13 on the substrate 11, so that the signal layer 13 completely blocks the hollow area 19, thereby being able to better eliminate the interference of the touch layer 12 on the display layer 17, thereby being able to improve the display effect of the display panel 10.

[0141] like Fig.11 As shown, an embodiment of the present application provides a display device 30 , which includes the display panel 10 and the touch chip 20 provided in the above embodiment; the display panel 10 is electrically connected to the touch chip 20 through a flexible circuit board 14 .

[0142] The display device 30 can be a laptop computer, a mobile phone, a wireless device, a personal data assistant (PDA), a handheld or portable computer, a GPS receiver / navigator, a camera, an MP4 video player, a camcorder, a game console, a watch, a clock, a calculator, a television monitor, a flat panel display, a computer monitor, an automobile display (e.g., an odometer display, etc.), a navigator, a cockpit controller and / or display, a display of a camera view (e.g., a display of a rearview camera in a vehicle), an electronic photo, an electronic billboard or sign, a projector, packaging, etc.

[0143] The display device 30 provided in this embodiment includes the display panel 10 provided in the above embodiment, and the display device 30 has all the beneficial effects of the display panel 10, which will not be described in detail here.

[0144] See also Fig.12 An embodiment provides a touch detection method. This embodiment takes the touch detection method applied to a touch chip in a display device as an example for explanation. The method comprises the following steps:

[0145] Step 120: Receive the interference signal detected by the signal layer.

[0146] The user's touch operation on the touch layer in the display device generates a touch signal, which includes a target touch signal and an interference signal generated by the coupling capacitance between the touch layer and the display layer. The signal layer receives the touch signal and transmits it to the touch chip.

[0147] After receiving the touch signal transmitted by the signal layer, the touch chip analyzes the touch signal and can determine the target touch signal and the interference signal in the touch signal.

[0148] In an optional embodiment, the touch signal and the offset signal output to the signal layer are as follows: Fig.13 As shown, the touch signal includes a target touch signal and an interference signal. The interference signal in the touch signal can be offset by the offset signal, and the target touch signal is retained.

[0149] In an optional embodiment, the interference signal and the cancellation signal are as follows: Fig.14 As shown, the level of the cancellation signal is opposite to that of the interference signal, and the absolute value of the cancellation signal is less than or equal to the absolute value of the interference signal.

[0150] Step 121: output a cancellation signal to the signal layer according to the interference signal; the cancellation signal is used to cancel the interference signal.

[0151] After determining the interference signal in the touch signal, the touch chip will output a cancellation signal to the signal layer according to the interference signal. The cancellation signal is used to cancel the interference signal in the touch signal.

[0152] The touch detection method provided in the embodiment of the present application receives the interference signal detected by the signal layer, and outputs a cancellation signal to the signal layer according to the interference signal to cancel the interference signal. This can eliminate the interference caused by the touch layer to the display layer, thereby improving the display effect of the display device.

[0153] In one embodiment, an implementation method of receiving an interference signal detected by a signal layer includes:

[0154] The data detected by the receiving signal layer is received, and the coupling capacitance is determined according to the data.

[0155] After receiving the interference signal detected by the signal layer, the touch chip can calculate data based on the interference signal; the data is used to represent the touch capacitance. The coupling capacitance formed by the touch layer and the display layer can be determined based on the data. This embodiment does not limit the specific method of determining the coupling capacitance, as long as its function can be achieved.

[0156] In this embodiment, the coupling capacitance formed by the touch layer and the display layer is determined by receiving data detected by the signal layer. In this way, the coupling capacitance can be offset by outputting an electric field opposite to the coupling capacitance to the signal layer, thereby improving the practicality and reliability of the touch detection method.

[0157] In one embodiment, before receiving the interference signal detected by the signal layer, the touch detection method further includes:

[0158] Set the initial operating parameters of the signal layer, which include voltage and frequency.

[0159] Before the display device is used (i.e., before the touch screen works), the touch chip can set the initial working parameters of the signal layer. The initial working parameters can be the working parameters of the signal layer obtained by the touch chip when the display device was used last time; or they can be input to the touch chip by the user based on actual application and experience. This embodiment does not limit the specific method of setting the initial working parameters of the signal layer, as long as its function can be achieved. The initial working parameters may include the working voltage of the signal layer and the working frequency of the signal layer. For example, the initial working parameters of the signal layer include: the working voltage is 5V and the working frequency is 1kHz.

[0160] In this embodiment, the canceling effect of the signal layer on the interference signal can be improved by pre-acquiring the initial working parameters of the signal layer.

[0161] In an optional embodiment, during the operation of the touch screen, the initial operating parameters of the signal layer may be optimized and adjusted to achieve the best offset effect on the interference signal.

[0162] See also Fig.15 An embodiment of the present application provides a method for preparing a display panel, the method comprising:

[0163] Step 150: providing a substrate;

[0164] Step 151 : forming a signal layer and a touch layer on one side of a substrate.

[0165] The touch layer is electrically connected to the touch chip, the signal layer is electrically connected to the touch chip, and is used to detect interference signals and transmit the interference signals to the touch chip, so that the touch chip outputs a cancellation signal to the signal layer to cancel the interference signal according to the interference signal. The specific description of the structure of the display panel can refer to the specific description of the display panel in the above embodiment, which will not be repeated here.

[0166] The display panel formed by the preparation method provided in this embodiment includes a signal layer, through which the interference signal generated by the touch layer on the display layer can be detected, so that by outputting a cancellation signal to the signal layer to cancel the interference signal, the interference generated by the touch layer on the display layer can be eliminated, thereby improving the display effect of the display panel.

[0167] In one embodiment, Fig.16 As shown, a method for forming a signal layer and a touch layer on one side of a substrate is provided, and the steps of the method for implementing the method include:

[0168] Step 160 , forming a first metal material layer on the substrate, and patterning the first metal material layer to form a plurality of bridges and a signal layer.

[0169] In this embodiment, a plurality of bridges and signal layers are located in the same layer. After a first metal material is formed on a substrate, a plurality of bridges and signal layers can be formed by patterning the first metal material layer using a mask.

[0170] Step 161 : forming a second metal material layer on the first metal material layer, and patterning the second metal material layer to form a touch layer.

[0171] The present embodiment does not limit the materials of the first metal material layer and the second metal material layer, as long as the functions thereof can be achieved. The process methods for patterning the first metal material layer and the second metal material layer can be the same or different. The process methods for patterning can include exposure, development, etching, etc.

[0172] In this embodiment, a first metal material layer is formed on a substrate and patterned using a mask plate to form multiple bridges and signal layers. This eliminates the need to add additional mask plates when preparing the signal layer, thereby reducing preparation costs.

[0173] In the case of using “including”, “having”, and “comprising” described herein, another component may be added unless a clear limiting term such as “only”, “consisting of”, etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as being one in number.

[0174] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0175] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: include: substrate; A touch layer, disposed on one side of the substrate and electrically connected to the touch chip; A signal layer, disposed on one side of the substrate and electrically connected to the touch control chip; The signal layer is used to detect an interference signal and transmit the interference signal to the touch control chip, so that the touch control chip outputs a cancellation signal for canceling the interference signal to the signal layer according to the interference signal.

2. The display panel according to claim 1, characterized in that: The touch layer includes a plurality of first touch electrodes and a plurality of second touch electrodes; Adjacent first touch electrodes and / or adjacent second touch electrodes are connected via a bridge; Optionally, the plurality of bridges and the signal layer are located in the same layer; Optionally, the signal layer is used to detect an interference signal and transmit the interference signal to the touch control chip, so that the touch control chip outputs a cancellation signal with a level opposite to that of the interference signal to the signal layer according to the interference signal; Optionally, the absolute value of the cancellation signal is less than or equal to the absolute value of the interference signal.

3. The display panel according to claim 1, characterized in that: The signal layer includes a plurality of first signal electrode groups and a plurality of second signal electrode groups; The plurality of first signal electrode groups are arranged at intervals along the first direction and are electrically connected to the data transmission end of the touch control chip, and each of the first signal electrode groups includes a plurality of first signal electrodes arranged along the second direction; The plurality of second signal electrode groups are arranged at intervals along the second direction and are electrically connected to the data transmission end of the touch control chip, and each of the second signal electrode groups includes a plurality of second signal electrodes arranged along the first direction; The first direction and the second direction intersect and are both perpendicular to the thickness direction of the touch layer; Optionally, in the same second signal electrode group, each of the second signal electrodes is located between two adjacent first signal electrode groups, and is electrically connected to one of the two adjacent first signal electrode groups; Optionally, in the same second signal electrode group, two adjacent second signal electrodes are electrically connected to different first signal electrode groups, respectively.

4. The display panel according to claim 3, characterized in that: The touch layer includes a plurality of first touch electrode chains and a plurality of second touch electrode chains; The plurality of first touch electrode chains are arranged at intervals along the first direction and are all electrically connected to the data receiving end of the touch chip; each of the first touch electrode chains includes a plurality of first touch electrodes arranged and electrically connected along the second direction; The plurality of second touch electrode chains are arranged at intervals along the second direction and are all electrically connected to the data transmission end of the touch chip; each of the second touch electrode chains includes a plurality of second touch electrodes arranged along the first direction and electrically connected.

5. The display panel according to claim 4, characterized in that: The plurality of first touch electrode chains and the plurality of second touch electrode chains are located in the same layer; Optionally, each of the first touch electrode chain and the second touch electrode chain is electrically connected to the touch chip via a lead-out wiring.

6. The display panel according to claim 4, characterized in that: The plurality of first signal electrode groups correspond to the plurality of first touch electrode chains, and the plurality of second signal electrode groups correspond to the plurality of second touch electrode chains; Optionally, the pattern of the first touch electrode is the same as the pattern of the first signal electrode; Optionally, a pattern of the second touch electrode is the same as a pattern of the second signal electrode; Optionally, the pattern of the first touch electrodes and the pattern of the first signal electrodes include quadrilaterals; Optionally, the pattern of the second touch electrodes and the pattern of the second signal electrodes include quadrilaterals.

7. The display panel according to claim 3, characterized in that: The plurality of first signal electrode groups and the plurality of second signal electrode groups are electrically connected to the data transmission end of the touch control chip through a flexible circuit board.

8. The display panel according to any one of claims 1 to 7, characterized in that: Also includes: A display layer is provided on a side of the signal layer close to the substrate; the display layer includes a plurality of light emitting elements arranged at intervals; The display panel further comprises an isolation structure, wherein the isolation structure encloses a plurality of isolation openings, and the plurality of light emitting elements are arranged corresponding to the plurality of isolation openings; Optionally, the light emitting element comprises a first electrode, a light emitting portion and a second electrode stacked in a direction away from the substrate, and the second electrode is electrically connected to the isolation structure; Optionally, the signal layer is disposed on a side of the touch layer close to the substrate.

9. The display panel according to claim 1, characterized in that: The display panel comprises a display area and a hole-punch area adjacent to the display area; The touch layer and the signal layer are both arranged in the display area and are arranged around the hole area.

10. The display panel according to claim 8, characterized in that: It also includes a hollow area arranged in the same layer as the second electrode, and at least a part of the orthographic projection of the signal layer on the substrate overlaps with the orthographic projection of the hollow area on the substrate; Optionally, the orthographic projection of the hollow area on the substrate is located within the range of the orthographic projection of the signal layer on the substrate.

11. A display device, characterized in that: It comprises the display panel and touch chip as described in any one of claims 1 to 10; the display panel is electrically connected to the touch chip through a flexible circuit board.

12. A touch detection method, characterized in that: The method comprises: receiving interference signals detected by the signal layer; A cancellation signal is output to the signal layer according to the interference signal; the cancellation signal is used to cancel the interference signal.

13. The detection method according to claim 12, characterized in that: The interference signal detected by the receiving signal layer includes: receiving data detected by the signal layer, and determining coupling capacitance according to the data; Optionally, before the receiving signal layer detects the interference signal, the method further includes: Setting initial operating parameters of the signal layer, wherein the initial operating parameters include voltage and frequency; Optionally, the cancellation signal has a level opposite to that of the interference signal; Optionally, the absolute value of the cancellation signal is less than or equal to the absolute value of the interference signal.

14. A method for preparing a display panel, characterized in that: The method comprises: providing a substrate; forming a signal layer and a touch layer on one side of the substrate; Among them, the touch layer is electrically connected to the touch chip, and the signal layer is electrically connected to the touch chip and is used to detect interference signals and transmit the interference signals to the touch chip, so that the touch chip outputs a cancellation signal to the signal layer to cancel the interference signal according to the interference signal.

15. The preparation method according to claim 14, characterized in that: The signal layer and the touch layer are formed on one side of the substrate, comprising: Forming a first metal material layer on the substrate, and patterning the first metal material layer to form a plurality of bridges and signal layers; A second metal material layer is formed on the first metal material layer, and the second metal material layer is patterned to form the touch control layer.

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