Touch display panel

Abstract

The embodiment of the utility model relates to the technical field of display, and provides a touch display panel, which can realize touch detection of fingers and different types of touch pens by the touch display panel on the premise of greatly reducing the cost. The touch display panel comprises a touch layer, a display substrate and a controller, the touch layer comprises a plurality of first electrodes which are arranged at intervals along a first direction; the plurality of second electrodes are arranged at intervals along a second direction; the display substrate comprises a plurality of first ground wires, a plurality of second ground wires, a plurality of first transistors and a plurality of second transistors. The first ground wire is electrically connected with the corresponding first electrode through a first transistor; the second ground wire is electrically connected with the corresponding second electrode through a second transistor; the controller is used for providing control signals for the first transistor and the second transistor; the touch layer is used for executing electromagnetic induction operation during the conduction period of the first transistor and the second transistor and executing capacitive induction operation during the cut-off period of the first transistor and the second transistor.

Description

Technical Field

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

[0002] Touchscreen display panels typically use two touch technologies: electromagnetic induction touch and capacitive touch. Capacitive touch allows users to control electronic devices with their fingers or a capacitive stylus. Electromagnetic touch allows users to control electronic devices with an electromagnetic stylus. Display panels that combine these two technologies can significantly enhance the user experience.

[0003] However, the detection system for finger touches differs from that for styluses (including capacitive and electromagnetic pens), requiring two separate touch screen and detection systems, significantly increasing costs. The challenge is to ensure that touch display panels can detect both finger touches and different stylus types while reducing costs. Utility Model Content

[0004] The embodiments of the present application provide a touch display panel that can detect touches of fingers and different types of styluses while significantly reducing costs.

[0005] According to some embodiments of the present application, the embodiments of the present application provide a touch display panel, comprising: a touch layer, a display substrate, and a controller, wherein the touch layer is provided on a display side of the display substrate;

[0006] The touch layer includes:

[0007] a plurality of first electrodes arranged at intervals along a first direction;

[0008] a plurality of second electrodes spaced apart along the second direction, the second electrodes being insulated and arranged to cross the first electrodes, and the second direction being different from the first direction;

[0009] The display substrate includes: a substrate, and a plurality of first ground lines, a plurality of second ground lines, a plurality of first transistors, and a plurality of second transistors arranged on the substrate;

[0010] wherein a plurality of first ground lines are arranged at intervals along the first direction, the first ground lines, the first electrodes, and the first transistors correspond one to one, and the first ground lines are electrically connected to the corresponding first electrodes via the first transistors; and a plurality of second ground lines are arranged at intervals along the second direction, the second ground lines, the second electrodes, and the second transistors correspond one to one, and the second ground lines are electrically connected to the corresponding second electrodes via the second transistors;

[0011] The controller is electrically connected to each of the first transistors and each of the second transistors, and is configured to provide a control signal to the first transistor and the second transistor, so that the first transistor and the second transistor are turned on or off in response to the control signal;

[0012] The touch layer is configured to perform an electromagnetic induction operation when the first transistor and the second transistor are turned on, and to perform a capacitive induction operation when the first transistor and the second transistor are turned off.

[0013] According to some embodiments of the present application, the display substrate includes a display area and a non-display area, the non-display area being arranged at least on one side of the display area; the plurality of first transistors and the plurality of second transistors are arranged in the non-display area on the same layer; and the plurality of first ground lines and the plurality of second ground lines are arranged in the display area.

[0014] The first transistor and the second transistor are arranged on the same layer and respectively include a gate, a source and a drain; the first ground line is arranged on the same layer as the gate, and the second ground line is arranged on the same layer as the source or the drain; or, the first ground line is arranged on the same layer as the source or the drain, and the second ground line is arranged on the same layer as the gate.

[0015] According to some embodiments of the present application, the display substrate includes a display area and a non-display area, wherein the non-display area is at least arranged on one side of the display area; a plurality of the first ground lines and a plurality of the second ground lines are arranged in the display area;

[0016] The display area includes a plurality of data lines arranged at intervals along the first direction and a plurality of gate lines arranged at intervals along the second direction on the substrate; the data lines and the gate lines are arranged in different layers;

[0017] The first ground line is provided on the same layer as the data line, and the second ground line is provided on the same layer as the gate line; or the first ground line is provided on the same layer as multiple gate lines, and the second ground line is provided on the same layer as multiple data lines.

[0018] According to some embodiments of the present application, the display substrate is an OLED display substrate, which includes a plurality of light-emitting units and a plurality of first driving units arranged in an array on the substrate, wherein the light-emitting units include an anode, an organic light-emitting functional layer, and a cathode; the first driving unit is electrically connected to the corresponding anode, and the first driving unit is arranged on a side of the anode close to the substrate;

[0019] The first ground wire is arranged on the same layer as the anode, and the second ground wire is arranged between the anode and the first driving unit; or, the first ground wire is arranged between the anode and the first driving unit, and the second ground wire is arranged on the same layer as the anode; or, the first ground wire and the second ground wire are respectively arranged on a side of the cathode close to the substrate and a side away from the substrate.

[0020] According to some embodiments of the present application, the first transistor, the second transistor and the first driving unit are arranged on the same layer.

[0021] According to some embodiments of the present application, the display substrate is a liquid crystal display substrate, which includes a liquid crystal layer and a common voltage layer provided on the substrate, wherein the common voltage layer is provided on one side of the liquid crystal layer;

[0022] The first ground line and the second ground line are respectively arranged on a side of the common voltage layer close to the liquid crystal layer and a side away from the liquid crystal layer;

[0023] Alternatively, the first ground line and the second ground line are respectively arranged on a side of the liquid crystal layer close to the common voltage layer and a side away from the common voltage layer.

[0024] According to some embodiments of the present application, the liquid crystal display substrate further includes a plurality of second driving units, wherein the second driving units are arranged on a side of the liquid crystal layer close to the substrate; the first ground line and the second ground line are both arranged on a side of the second driving unit away from the substrate;

[0025] The first transistor, the second transistor and the second driving unit are arranged in the same layer.

[0026] According to some embodiments of the present application, the first electrode is electrically connected to the corresponding first transistor through a first via, and the second electrode is electrically connected to the corresponding second transistor through a second via.

[0027] According to some embodiments of the present application, the touch display panel further includes a flexible circuit board disposed on a side of the display substrate;

[0028] The first electrode and the second electrode are electrically connected to the corresponding first transistor and the corresponding second transistor respectively through the flexible circuit board.

[0029] According to some embodiments of the present application, the first ground line and the second ground line are each a single metal line; or, the first ground line and the second ground line each include a plurality of metal sub-lines connected in parallel.

[0030] An embodiment of the present application provides a touch display panel. On the one hand, by controlling the opening and closing of a first switch tube and a second switch tube, the connection relationship between the first electrode and the first ground line, as well as the connection relationship between the second electrode and the second ground line, is controlled, thereby quickly and accurately switching between electromagnetic induction operation and capacitive sensing operation. Without the need to design two separate touch layers, touch detection for fingers and different types of styluses can be achieved, thereby significantly reducing costs. On the other hand, integrating the first ground line and the second ground line into the display substrate can effectively reduce the overall thickness of the panel, further reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplified descriptions do not constitute a limitation on the embodiments. Unless otherwise stated, the pictures in the drawings do not constitute a scale limitation. In order to more clearly illustrate the embodiments of the present application or the technical solutions in the traditional technology, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 A schematic diagram of the structure of a touch display panel provided in the related art;

[0033] Figure 2 A schematic structural diagram of a touch display panel provided in an embodiment of the present application;

[0034] Figure 3 A schematic structural diagram of a touch layer provided in an embodiment of the present application;

[0035] Figure 4 A schematic structural diagram of a display substrate provided in an embodiment of the present application;

[0036] Figure 5 A schematic structural diagram of another touch display panel provided in an embodiment of the present application;

[0037] Figure 6 A circuit connection diagram of a touch display panel provided in an embodiment of the present application;

[0038] Figure 7 A schematic structural diagram of an OLED display substrate provided in an embodiment of the present application;

[0039] Figure 8 A schematic structural diagram of a liquid crystal display substrate provided in an embodiment of the present application;

[0040] Figure 9 This is a structural diagram of another touch display panel provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] In the description of the embodiments of the present application, "at least one" means one or more, "at least one layer" means one or more layers, "multiple" means two or more, and "multi-layer" means two or more layers, unless otherwise clearly defined.

[0043] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0044] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. For example, if the device or element in the figure is inverted, then the element described as being "below" or "below" or "below" or "bottom" of other elements or features will be oriented "above" or "top" of the other elements or features. Therefore, the term "below" can cover both above and below orientations depending on the context in which the term is used, which will be obvious to a person skilled in the art. The material can be oriented in other ways (e.g., rotated 90 degrees, inverted, flipped), and the spatially relative descriptors used herein can be interpreted accordingly.

[0046] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0047] In the drawings corresponding to the embodiments of the present application, the thickness and area of ​​the layers are exaggerated for better understanding and ease of description.

[0048] In the description of the embodiments of the present application, when a certain component "includes" another component, unless otherwise stated, other components are not excluded, and other components may be further included. A second component is formed or provided above or on the first component, or a second component is formed or provided on the surface of the first component, or a second component is formed or provided on one side of the first component. Embodiments in which the first component and the second component are in direct contact may be included, and embodiments in which additional components may be provided between the first component and the second component so that the first component and the second component may not be in direct contact may also be included. For the sake of simplicity and clarity, various components may be arbitrarily drawn in different proportions. In the accompanying drawings, some layers / components may be omitted for simplicity. Unless otherwise specified, a second component is formed or provided on the surface of the first component, which means that the first component is in direct contact with the second component. Among them, the above-mentioned "component" may refer to: layer, film, area, part, structure, etc.

[0049] refer to Figure 1 As shown, a touch display panel with both electromagnetic touch and capacitive touch functions in related art includes: a glass cover 101, a capacitive touch layer 102, a buffer protection layer 103, a display layer 104, and an electromagnetic touch layer 105. The separate design of the capacitive touch layer 102 and the electromagnetic touch layer 105 increases the overall thickness of the panel, and also increases the cost.

[0050] Based on this, the embodiment of the present application provides a touch display panel, referring to Figure 2 As shown, it includes: a touch layer 1, a display substrate 2 and a controller, and the touch layer 1 is arranged on the display side of the display substrate 2.

[0051] refer to Figure 3As shown, the touch layer 1 includes: a plurality of first electrodes 11 arranged at intervals along a first direction OA, a plurality of second electrodes 12 arranged at intervals along a second direction OB, the second electrodes 12 and the first electrodes 11 are insulated and arranged to cross each other, and the second direction OB is different from the first direction OA.

[0052] refer to Figure 4 As shown, the display substrate 2 includes: a substrate 20, and a plurality of first ground lines 21, a plurality of second ground lines 22, a plurality of first transistors 23 and a plurality of second transistors 24 provided on the substrate 20; wherein the plurality of first ground lines 21 are arranged at intervals along the first direction OA, with reference to Figure 5 and Figure 6 As shown, the first ground line 21, the first electrode 11 and the first transistor 23 correspond to each other one by one, and the first ground line 21 is electrically connected to the corresponding first electrode 11 via the first transistor 23; Figure 4 and Figure 6 As shown, a plurality of second ground lines 22 are arranged at intervals along the second direction OB. The second ground lines 22 , the second electrodes 12 and the second transistors 24 correspond to each other one by one. The second ground lines 22 are electrically connected to the corresponding second electrodes 12 via the second transistors 24 .

[0053] refer to Figure 6 As shown, the controller 3 is electrically connected to each first transistor 23 and each second transistor 24, respectively, and is used to provide control signals to the first transistor and the second transistor, so that the first transistor and the second transistor are turned on or off in response to the control signals.

[0054] The touch layer is used to perform an electromagnetic induction operation during a period when the first transistor and the second transistor are turned on, and to perform a capacitive induction operation during a period when the first transistor and the second transistor are turned off.

[0055] In the embodiment of the present application, the specific structures of the first electrode and the second electrode are not limited. For example, the first electrode and the second electrode can be a single-layer pattern, a double-layer pattern or a single-layer bridge pattern, etc., wherein the pattern can be a long strip or a diamond, etc. Figure 3 The first electrode 11 and the second electrode 12 are each a strip pattern. The materials of the first electrode and the second electrode are not limited. To avoid affecting the display effect, they can be made of transparent conductive materials such as ITO (Indium Tin Oxide).

[0056] In the embodiment of the present application, the second direction and the first direction may be perpendicular to each other, or the angle formed by the two may be an acute angle. Figure 3 The second direction OB is perpendicular to the first direction OA as an example for illustration.

[0057] In the embodiment of the present application, the display side of the display substrate refers to the side that can realize display.

[0058] In the embodiment of the present application, the type of display substrate is not limited. The display substrate can be a rigid display substrate, or a flexible display substrate (i.e., bendable and foldable). The display substrate can be a TN (Twisted Nematic) type, VA (Vertical Alignment) type, IPS (In-Plane Switching) type, or ADS (Advanced Super Dimension Switch) type liquid crystal display substrate, or it can also be an OLED (Organic Light-Emitting Diode) display substrate, or it can also be a Micro LED micro display substrate or a Mini LED micro display substrate. Among them, the OLED display substrate can be an AMOLED (Active Matrix Organic Light Emitting Diode) display substrate, or it can also be other types of OLED display substrates.

[0059] In the embodiment of the present application, the material of the substrate is not limited. For example, the material of the substrate can be glass, ITO (Indium Tin Oxide) or silver nanowires.

[0060] In the embodiments of the present application, the types of the first transistor and the second transistor are not limited. For example, the first transistor and the second transistor can be thin-film transistors, field-effect transistors, or other devices with the same characteristics. A transistor may include a gate, a source, and a drain. Generally, the source and drain of a transistor are symmetrically arranged. According to the characteristics of the transistor, the transistor can be divided into N-type and P-type, which is not limited here.

[0061] In the embodiment of the present application, the controller may include a single-chip microcomputer, an ARM (Advanced RISC Machines) chip, a DSP (Digital Signal Processing) chip or an FPGA (Field Programmable Gate Array) chip, etc., which is not limited here.

[0062] In the embodiment of the present application, the specific structure of the electrical connection between the controller and each first transistor and each second transistor is not limited. For example, the controller can be Figure 4The first connecting line 201 is electrically connected to the gate of each first transistor 23. Figure 4 The second connection line 202 is electrically connected to the gate of each second transistor 24, so as to control the cut-off or conduction of each first transistor and each second transistor.

[0063] It should be noted that the reference Figure 4 As shown, the display substrate may include a display area AA and a non-display area NA, wherein the non-display area NA is arranged on one side of the display area AA; wherein the display area refers to an area for realizing display, and the non-display area is generally used to set a driving circuit, etc. The first transistor and the second transistor may be as follows Figure 4 As shown, it is set in the display area AA, or it can also be set in the non-display area, which is not limited here. Figure 4 As shown, the first ground line 21 and the second ground line 22 are set in the display area AA; according to the type of the display substrate, the display area may include multiple layer structures, and the first ground line and the second ground line can be set in the same layer as the existing film layer, or can be set separately, which is not limited here.

[0064] In the touch display panel of the embodiment of the present application, during the period when the first transistor and the second transistor are on, the first ground line is electrically connected to the corresponding first electrode via the first transistor, and the second ground line is electrically connected to the corresponding second electrode via the second transistor. In this case, if a user touches the touch display panel using an electromagnetic pen, the electromagnetic pen will send an electromagnetic signal, thereby changing the magnetic flux on the first electrode, the first ground line, the second electrode, and the second ground line near the touch location. The controller can detect the magnetic flux distribution on the first electrode, the first ground line, the second electrode, and the second ground line and calculate the coordinates of the touch location, thereby realizing the electromagnetic induction touch function. During the period when the first transistor and the second transistor are off, the first ground line is disconnected from the corresponding first electrode, and the second ground line is disconnected from the corresponding second electrode. In this case, if a user touches the touch display panel using a finger or a capacitive pen, the finger or the capacitive pen will change the capacitance of the capacitor structure formed by the first and second electrodes near the touch location. The controller can detect the capacitance value between the first and second electrodes and calculate the coordinates of the touch location, thereby realizing the capacitive induction touch function.

[0065] In the embodiment of the present application, the touch display panel can be any product or component with a display function, such as a television, a digital camera, a mobile phone, or a tablet computer.

[0066] The touch display panel provided by the embodiment of the present application, on the one hand, controls the connection relationship between the first electrode and the first ground line, and the connection relationship between the second electrode and the second ground line by controlling the opening and closing of the first switch tube and the second switch tube, thereby quickly and accurately realizing the switching between the electromagnetic induction operation and the capacitive sensing operation. Figure 1 The touch display panel shown in FIG. 1 can realize touch detection for fingers and different types of styluses without designing two sets of touch layers separately, thereby significantly reducing costs. On the other hand, the first ground line and the second ground line are integrated into the display substrate, which is more convenient than Figure 1 The touch display panel shown can effectively reduce the overall thickness of the panel and further reduce costs.

[0067] In some embodiments, the electrical connection between a first ground line and a corresponding first electrode via a first transistor means: one end of the first ground line is electrically connected to the source of the first transistor, the other end is grounded or connected to a preset voltage, one end of the first electrode is electrically connected to the drain of the first transistor, the other end is electrically connected to a controller, and the gate of the first transistor is electrically connected to the controller. The electrical connection between a second ground line and a corresponding second electrode via a second transistor means: one end of the second ground line is electrically connected to the source of the second transistor, the other end is grounded or connected to a preset voltage, one end of the second electrode is electrically connected to the drain of the second transistor, the other end is electrically connected to the controller, and the gate of the second transistor is electrically connected to the controller. When the first and second transistors are closed, a loop is formed between the first ground line and the corresponding first electrode, and a loop is formed between the second ground line and the corresponding second electrode. When the first and second transistors are closed, the first ground line is disconnected from the corresponding first electrode, and the second ground line is disconnected from the corresponding second electrode.

[0068] If the first ground line and the second ground line are set in the display area, and the first transistor and the second transistor are set in the same layer in the non-display area, the corresponding first ground line and the first transistor can be connected by setting a first lead, and the corresponding second ground line and the second transistor can be connected by setting a second lead.

[0069] In some embodiments, the orthographic projection of the first ground wire on the substrate can be located between the orthographic projections of adjacent first electrodes on the substrate, and the orthographic projection of the second ground wire on the substrate can be located between the orthographic projections of adjacent second electrodes on the substrate. Here, the orthographic projection of the first ground wire on the substrate refers to: the projection on the substrate in a direction perpendicular to the substrate; the meanings of the orthographic projections of the first electrode, the second ground wire, and the second electrode on the substrate are similar to this and will not be repeated here.

[0070] In some embodiments, the orthographic projection of the first ground line on the substrate may also overlap with the orthographic projection of the corresponding first electrode on the substrate, and the orthographic projection of the second ground line on the substrate may also overlap with the orthographic projection of the corresponding second electrode on the substrate.

[0071] To ensure that the electromagnetic pen can simultaneously generate signals in both sensing loops at any position, thereby improving touch accuracy, the sensing loop formed by the first ground wire and the corresponding first electrode crosses the first electrode of at least one other sensing loop, and the sensing loop formed by the second ground wire and the corresponding second electrode crosses the second electrode of at least one other sensing loop. Of course, if too many sensing loops are crossed, the sensing signals will be too similar, reducing the reference quality. Therefore, the number of crossing sensing loops needs to be adjusted according to actual requirements.

[0072] In one or more embodiments, reference Figure 4 As shown, the display substrate includes a display area AA and a non-display area NA, and the non-display area NA is arranged on at least one side of the display area AA; a plurality of first transistors 23 and a plurality of second transistors 24 are arranged on the same layer in the non-display area NA; a plurality of first ground lines 21 and a plurality of second ground lines 22 are arranged in the display area AA; the first transistors and the second transistors are arranged on the same layer, and respectively include a gate, a source and a drain; the first ground line is arranged on the same layer as the gate, and the second ground line is arranged on the same layer as the source or the drain; or, the first ground line is arranged on the same layer as the source or the drain, and the second ground line is arranged on the same layer as the gate.

[0073] The non-display area being provided at least on one side of the display area means that the non-display area can be provided on only one side of the display area, or on multiple sides of the display area, or surrounding the display area. Figure 4 The non-display area NA is arranged to surround the display area AA for illustration.

[0074] The above-mentioned same-layer arrangement refers to a one-shot patterning process. A one-shot patterning process is a process that forms the desired layer structure through a single film formation and photolithography process. The one-shot patterning process includes film formation, exposure, development, etching, and stripping.

[0075] In the embodiment of the present application, the first transistor and the second transistor are arranged in the same layer in the non-display area. On the one hand, the first transistor and the second transistor are arranged in the same layer, which can reduce the number of composition times, thereby simplifying the process and reducing costs; on the other hand, the first transistor and the second transistor are arranged in the non-display area, which can avoid affecting the aperture ratio of the display substrate, thereby ensuring the display effect.

[0076] In an embodiment of the present application, the first ground line is set on the same layer as the gate, and the second ground line is set on the same layer as the source or drain, or the first ground line is set on the same layer as the source or drain, and the second ground line is set on the same layer as the gate; both structures can further reduce the number of composition times, thereby further simplifying the process and further reducing costs.

[0077] In order to improve the conduction effect, the first transistor and the second transistor can be TFT (Thin Film Transistor), which can include a gate, a gate insulating layer, an active layer, a source electrode and a drain electrode. There is no limitation on the type of thin film transistor here, which can be a top-gate thin film transistor or a bottom-gate thin film transistor. There is no limitation on the material of the active layer here, which can be an oxide semiconductor material, such as IGZO (Indium Gallium Zinc Oxide), ITZO (Indium Tin Zinc Oxide), IZO (Indium Zinc Oxide), etc.; it can also be LTPS (Low Temperature Poly-silicon); of course, it can also be single crystal silicon and other materials.

[0078] In one or more embodiments, reference Figure 4 As shown, the display substrate includes a display area AA and a non-display area NA, and the non-display area NA is arranged on at least one side of the display area AA; a plurality of first ground lines 21 and a plurality of second ground lines 22 are arranged in the display area AA; the display area includes a plurality of data lines arranged along a first direction and a plurality of gate lines arranged along a second direction on the substrate; the data lines and the gate lines are arranged in different layers; the first ground line is arranged in the same layer as the data line, and the second ground line is arranged in the same layer as the gate line; or, the first ground line is arranged in the same layer as the plurality of gate lines, and the second ground line is arranged in the same layer as the plurality of data lines.

[0079] In the embodiments of the present application, the data line is used to provide a data voltage to the source of the transistor, and the gate line is used to provide a turn-on voltage to the gate of the transistor. A first ground line is provided on the same layer as the data line, and a second ground line is provided on the same layer as the gate line; alternatively, the first ground line is provided on the same layer as multiple gate lines, and the second ground line is provided on the same layer as multiple data lines. Both structures can further reduce the number of patterning operations, thereby further simplifying the process and reducing costs.

[0080] In addition, it should be noted that the gate line can also be set on the same layer as the gate of the first transistor and the second transistor, and the data line can also be set on the same layer as the source and drain of the first transistor and the second transistor. At this time, the gate line, the gate of the first transistor and the second transistor, and the first ground line are set on the same layer, and the data line, the source and drain of the first transistor and the second transistor, and the second ground line are set on the same layer; or, the gate line, the gate of the first transistor and the second transistor, and the second ground line are set on the same layer, and the data line, the source and drain of the first transistor and the second transistor, and the first ground line are set on the same layer; both structures can further reduce the number of patterning times, thereby further simplifying the process and further reducing costs.

[0081] In the embodiment of the present application, it should be noted that the size of the first transistor and the second transistor is generally at the level of 100 um, while the border size of the non-display area of ​​the display substrate is generally at the level of mm. Therefore, arranging the first transistor and the second transistor in the non-display area of ​​the display substrate will not affect the original wiring layout and will not increase the border size.

[0082] Furthermore, since the control state of the touch display panel is consistent, that is, the touch display panel is in capacitive touch mode or electromagnetic touch mode, all first transistors and all second transistors can be connected to the controller via the same control line. This minimizes the number of control lines connecting the first transistors and the second transistors to the controller, thereby simplifying the circuit design.

[0083] In one or more embodiments, reference Figure 7 As shown, the display substrate is an OLED display substrate, which includes a plurality of light-emitting units and a plurality of first driving units 25 arranged in an array on a substrate 20. The light-emitting unit includes an anode 28, an organic light-emitting functional layer 27 and a cathode 29; the first driving unit 25 is electrically connected to the corresponding anode 28, and the first driving unit 25 is arranged on the side of the anode 28 close to the substrate 20.

[0084] The first ground wire is set at the same layer as the anode, and the second ground wire is set between the anode and the first driving unit; or the first ground wire is set between the anode and the first driving unit, and the second ground wire is set at the same layer as the anode; or Figure 7 As shown, the first ground line 21 and the second ground line 22 are respectively arranged on a side of the cathode 29 close to the substrate 20 and a side away from the substrate 20 .

[0085] In an embodiment of the present application, the first driving unit may include a transistor, and the specific structure of the organic light-emitting functional layer is not limited. For example, the organic light-emitting functional layer may include a light-emitting layer, a hole transport layer arranged between the light-emitting layer and the anode, an electron transport layer arranged between the light-emitting layer and the cathode, etc.

[0086] It should be noted that in the OLED display substrate, the anode of each light-emitting unit is set separately, and there is a gap between adjacent anodes; while the cathodes of each light-emitting unit are connected to each other to form a whole layer. Therefore, the first ground wire or the second ground wire can be set in the same layer as the anode. In the embodiment of the present application, the first ground wire is set in the same layer as the anode, and the second ground wire is set between the anode and the first driving unit; or, the first ground wire is set between the anode and the first driving unit, and the second ground wire can be set in the same layer as the anode; or, the first ground wire and the second ground wire are respectively set on the side of the cathode close to the substrate and the side away from the substrate. All three structures can further reduce the number of composition times, thereby further simplifying the process and further reducing costs.

[0087] refer to Figure 7 As shown, in the OLED display substrate, the first driving unit 25 is a transistor, which may include a first gate 252, a first active layer 251, a first source 253 and a first drain 254. A first insulating layer 30 is further provided between the first active layer 251 and the first gate 252, a first gate insulating layer 31 is further provided between the first gate 252 and the first source 253, and a first passivation layer 32 is further provided between the first source 253 and the anode 28. The OLED display substrate further includes a pixel defining layer 250 for forming a plurality of array-arranged grooves, in which an organic light-emitting functional layer 27 is provided; a second insulating layer 220 is further provided between the first ground line 21 and the cathode 29, a third insulating layer 33 is further provided between the second ground line 22 and the cathode 29, and a fourth insulating layer 34 is further provided above the second ground line 22.

[0088] In order to further simplify the process and cost, the first transistor, the second transistor and the first driving unit are arranged on the same layer, that is, the three film layers with the same function can be arranged on the same layer. For example, the gates of the first transistor, the second transistor and the first driving unit are arranged on the same layer, and the source and drain of the first transistor, the second transistor and the first driving unit are arranged on the same layer.

[0089] In one or more embodiments, reference Figure 8 As shown, the display substrate is a liquid crystal display substrate (Liquid Crystal Display, LCD), which includes a liquid crystal layer 35 and a common voltage layer 36 arranged on a substrate 20, and the common voltage layer 36 is arranged on one side of the liquid crystal layer 35; the first ground line 21 and the second ground line 22 are respectively arranged on the side of the common voltage layer 36 close to the liquid crystal layer 35 and the side away from the liquid crystal layer 35; or, the first ground line and the second ground line are respectively arranged on the side of the liquid crystal layer close to the common voltage layer and the side away from the common voltage layer.

[0090] The liquid crystal molecules in the liquid crystal layer can deflect at different angles under different voltages, thereby displaying different colors. The common voltage layer (i.e., Vcom layer) is used to provide a common voltage to the liquid crystal layer. This common voltage layer can be located on the side of the liquid crystal layer away from the substrate, or on the side of the liquid crystal layer closer to the substrate, without limitation. Figure 8 The common voltage layer 36 is disposed on a side of the liquid crystal layer 35 away from the substrate 20 as an example for illustration.

[0091] In order to further simplify the process and cost, refer to Figure 8As shown, the liquid crystal display substrate also includes a plurality of second driving units 37, which are arranged on the side of the liquid crystal layer 35 close to the substrate 20; the first ground line 21 and the second ground line 22 are both arranged on the side of the second driving unit 37 away from the substrate 20; the first transistor, the second transistor and the second driving unit are arranged on the same layer.

[0092] In the embodiment of the present application, the second driving unit may include a transistor. The first transistor, the second transistor, and the second driving unit are provided on the same layer, that is, the film layers having the same function of the three can be provided on the same layer. For example, the gates of the first transistor, the second transistor, and the second driving unit are provided on the same layer, and the sources and drains of the first transistor, the second transistor, and the second driving unit are provided on the same layer.

[0093] refer to Figure 8 As shown, in the liquid crystal display substrate, the second driving unit 37 is a transistor, which may include a second gate 352, a second active layer 351, a second source 353 and a second drain 354. A fifth insulating layer 39 is further provided between the second active layer 351 and the second gate 352, a second gate insulating layer 40 is further provided between the second gate 352 and the second source 353, and a second passivation layer 41 is further provided between the second source 353 and the pixel voltage layer 38; a sixth insulating layer 360 is provided between the first ground line 21 and the common voltage layer 36, a seventh insulating layer 361 is further provided between the second ground line 22 and the common voltage layer 36, and an eighth insulating layer 42 is further provided above the second ground line 22.

[0094] The specific connection method between the first electrode and the first transistor, and the specific connection method between the second electrode and the second transistor are described below.

[0095] In one or more embodiments, reference Figure 5 As shown, the first electrode 11 is electrically connected to the corresponding first transistor 23 through the first via hole, and the second electrode 12 is electrically connected to the corresponding second transistor 24 through the second via hole. This method is applicable to a display substrate that can be provided with a first via hole and a second via hole, such as an OLED display substrate. Figure 5 As shown, the first electrode 11 is provided with a first electrical connection point 110, and the first transistor 23 is provided with a second electrical connection point 200. The first electrical connection point 110 and the second electrical connection point 200 are connected together through a first via hole, thereby realizing electrical connection between the first electrode 11 and the corresponding first transistor 23. Figure 5 The electrical connection between the first electrode 11 and the corresponding first transistor 23 is taken as an example for illustration, and the electrical connection between the second electrode 12 and the corresponding second transistor 24 is similar.

[0096] In one or more embodiments, reference Figure 9As shown, the touch display panel also includes a flexible printed circuit (FPC) 4 disposed on the side of the display substrate. The first electrode 11 and the second electrode are electrically connected to the corresponding first transistor 21 and the corresponding second transistor, respectively, via the flexible printed circuit 4. This approach is suitable for display substrates where it is inconvenient to provide first and second vias, such as LCD display substrates. Because the flexible printed circuit is bendable and can conform to the bends of the screen edge, it is possible to avoid increasing the screen width and edge trace width. Figure 9 The first electrode 11 is electrically connected to the corresponding first transistor 23 through the flexible circuit board 4 as an example. The second electrode 12 is electrically connected to the corresponding second transistor 24 through the flexible circuit board 4 in a similar manner.

[0097] In one or more embodiments, the first ground line and the second ground line are both single metal lines; or, the first ground line and the second ground line are both comprised of a plurality of metal sub-lines connected in parallel.

[0098] The material of the single metal line and the metal sub-line can be a conductive material such as molybdenum (Mo) or aluminum (Al). If the first ground line is provided on the same layer as the first transistor, and the second ground line is provided on the same layer as the second transistor, because the single metal line in the TFT process is very thin, usually at the micrometer level, to reduce the line impedance, multiple metal sub-lines are connected in parallel to form the first and second ground lines. The shape and pattern of the first and second ground lines are not limited. For example, they can be elongated strips, diamonds, or other shapes and patterns.

[0099] Those skilled in the art will appreciate that the above-described embodiments are specific examples for implementing the present application, and that in actual applications, various changes in form and detail may be made thereto without departing from the spirit and scope of the present application. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined in the claims.

Claims

1. A touch display panel, characterized in that: include: A touch layer, a display substrate and a controller, wherein the touch layer is arranged on the display side of the display substrate; The touch layer includes: a plurality of first electrodes arranged at intervals along a first direction; a plurality of second electrodes spaced apart and arranged along a second direction, the second electrodes being insulated and arranged to cross the first electrodes, and the second direction being different from the first direction; The display substrate includes: a substrate, and a plurality of first ground lines, a plurality of second ground lines, a plurality of first transistors, and a plurality of second transistors arranged on the substrate; wherein a plurality of first ground lines are arranged at intervals along the first direction, the first ground lines, the first electrodes, and the first transistors correspond one to one, and the first ground lines are electrically connected to the corresponding first electrodes via the first transistors; and a plurality of second ground lines are arranged at intervals along the second direction, the second ground lines, the second electrodes, and the second transistors correspond one to one, and the second ground lines are electrically connected to the corresponding second electrodes via the second transistors; The controller is electrically connected to each of the first transistors and each of the second transistors, and is configured to provide a control signal to the first transistor and the second transistor, so that the first transistor and the second transistor are turned on or off in response to the control signal; The touch layer is configured to perform an electromagnetic induction operation when the first transistor and the second transistor are turned on, and to perform a capacitive induction operation when the first transistor and the second transistor are turned off.

2. The touch display panel according to claim 1, wherein: The display substrate includes a display area and a non-display area, wherein the non-display area is at least arranged on one side of the display area; the plurality of first transistors and the plurality of second transistors are arranged in the non-display area on the same layer; and the plurality of first ground lines and the plurality of second ground lines are arranged in the display area. The first transistor and the second transistor are arranged on the same layer and respectively include a gate, a source and a drain; the first ground line is arranged on the same layer as the gate, and the second ground line is arranged on the same layer as the source or the drain; or, the first ground line is arranged on the same layer as the source or the drain, and the second ground line is arranged on the same layer as the gate.

3. The touch display panel according to claim 1, wherein: The display substrate includes a display area and a non-display area, wherein the non-display area is at least arranged on one side of the display area; a plurality of the first ground lines and a plurality of the second ground lines are arranged in the display area; The display area includes a plurality of data lines arranged at intervals along the first direction and a plurality of gate lines arranged at intervals along the second direction on the substrate; the data lines and the gate lines are arranged in different layers; The first ground line is provided on the same layer as the data line, and the second ground line is provided on the same layer as the gate line; or the first ground line is provided on the same layer as multiple gate lines, and the second ground line is provided on the same layer as multiple data lines.

4. The touch display panel according to claim 1, wherein: The display substrate is an OLED display substrate, comprising a plurality of light-emitting units arranged in an array on the substrate and a plurality of first driving units, wherein the light-emitting units include an anode, an organic light-emitting functional layer, and a cathode; the first driving units are electrically connected to the corresponding anodes, and are arranged on a side of the anode close to the substrate; The first ground wire is arranged on the same layer as the anode, and the second ground wire is arranged between the anode and the first driving unit; or, the first ground wire is arranged between the anode and the first driving unit, and the second ground wire is arranged on the same layer as the anode; or, the first ground wire and the second ground wire are respectively arranged on a side of the cathode close to the substrate and a side away from the substrate.

5. The touch display panel according to claim 4, wherein: The first transistor, the second transistor and the first driving unit are arranged in the same layer.

6. The touch display panel according to claim 1, wherein: The display substrate is a liquid crystal display substrate, comprising a liquid crystal layer and a common voltage layer provided on the substrate, wherein the common voltage layer is provided on one side of the liquid crystal layer; The first ground line and the second ground line are respectively arranged on a side of the common voltage layer close to the liquid crystal layer and a side away from the liquid crystal layer; Alternatively, the first ground line and the second ground line are respectively arranged on a side of the liquid crystal layer close to the common voltage layer and a side away from the common voltage layer.

7. The touch display panel according to claim 6, wherein: The liquid crystal display substrate further includes a plurality of second driving units, wherein the second driving units are arranged on a side of the liquid crystal layer close to the substrate; the first ground line and the second ground line are both arranged on a side of the second driving unit away from the substrate; The first transistor, the second transistor and the second driving unit are arranged in the same layer.

8. The touch display panel according to any one of claims 1 to 7, wherein: The first electrode is electrically connected to the corresponding first transistor through a first via hole, and the second electrode is electrically connected to the corresponding second transistor through a second via hole.

9. The touch display panel according to any one of claims 1 to 7, wherein: The touch display panel further includes a flexible circuit board arranged on a side of the display substrate; The first electrode and the second electrode are electrically connected to the corresponding first transistor and the corresponding second transistor respectively through the flexible circuit board.

10. The touch display panel according to any one of claims 1 to 7, wherein: The first ground line and the second ground line are both single metal lines; or, the first ground line and the second ground line are both composed of a plurality of metal sub-lines connected in parallel.

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