Touch display panel and touch display device

Abstract

According to the touch display panel and the touch display device, the touch display panel is provided with a display area and a non-display area, the non-display area comprises a frame area and a binding area and further comprises a plurality of first electrodes arranged in an array and a plurality of public signal lines at least partially extending in the column direction, the first electrodes are located in the display area, and the first electrodes are located in the binding area. The plurality of first electrodes are in one-to-one correspondence with the plurality of common signal lines, the first electrodes are electrically connected with the corresponding common signal lines, the common signal lines comprise first signal lines at least partially located in the display area and second signal lines located in the frame area, and the first electrodes in the (i + 1) th row are located on the sides, close to the binding area, of the first electrodes in the ith row; the resistance of the first signal line of the common signal line connected with the first electrode in the (i + 1) th row is smaller than that of the first signal line of the common signal line connected with the first electrode in the ith row, and the resistance of the second signal line of the common signal line connected with the (i + 1) th row is larger than that of the second signal line of the common signal line connected with the first electrode in the ith row.

Description

Technical Field

[0001] The present disclosure relates to touch display technology, and in particular to a touch display panel and a touch display device. Background Art

[0002] The display products of Touch and Display Driver Integration (TDDI) include: touch display panel and touch display chip. The touch display chip is configured to provide touch drive signal and display drive signal to the touch display panel in time-sharing mode to realize the time-sharing drive of touch and display of TDDI display products. The touch display chip is a chip formed by integrating the touch chip and the display chip, which can realize the TDDI display products with slimmer appearance, brighter display and narrow frame. Summary of the invention

[0003] The following is a summary of the subject matter of the detailed description of the present disclosure. This summary is not intended to limit the scope of the claims.

[0004] In a first aspect, the present disclosure provides a touch display panel, which is provided with a display area and a non-display area, wherein the non-display area includes: a frame area and a binding area sequentially arranged in a direction away from the display area, including: a plurality of first electrodes arranged in an array and a plurality of common signal lines extending at least partially in a column direction, wherein the first electrodes are located in the display area, the plurality of first electrodes correspond to the plurality of common signal lines one by one, and the first electrodes are electrically connected to the corresponding common signal lines;

[0005] The common signal line includes: a first signal line at least partially located in the display area and a second signal line located in the border area, the first signal line is electrically connected to the second signal line, the first electrode of the i+1th row is located on the side of the first electrode of the i-th row close to the binding area, the resistance of the first signal line of the common signal line connected to the first electrode of the i+1th row is less than the resistance of the first signal line of the common signal line connected to the first electrode of the i-th row, the resistance of the second signal line of the common signal line connected to the i+1th row is greater than the resistance of the second signal line of the common signal line connected to the first electrode of the i-th row, 1≤i≤N-1, N is the total number of rows of first electrodes.

[0006] In an exemplary embodiment, the resistivity of the first signal line is smaller than the resistivity of the second signal line.

[0007] In an exemplary embodiment, the common signal line further includes: a third signal line at least partially located in the binding area, the third signal line being electrically connected to the second signal line, the third signal line at least partially extending along the column direction;

[0008] The resistivity of the third signal line is smaller than the resistivity of the second signal line.

[0009] In an exemplary embodiment, a difference R in resistance between the resistance of the second signal line of the common signal line connected to the i+1th row and the resistance of the second signal line of the common signal line connected to the first electrode of the i-th row satisfies R=L / S*ρ, where L is the distance between the centers of two first electrodes located in adjacent rows of the same column, S is the line width of the first signal line, and ρ is the resistivity of the first signal line.

[0010] In an exemplary embodiment, the first signal line extends along the column direction, and the length of the first signal line of the common signal line connected to the first electrode of the i+1th row along the column direction is shorter than the length of the first signal line of the common signal line connected to the first electrode of the ith row along the column direction.

[0011] In an exemplary embodiment, the second signal line is in a zigzag shape and at least partially extends along a column direction.

[0012] In an exemplary embodiment, a total length of the second signal lines of the common signal lines connected to the first electrodes in the (i+1)th row is greater than a total length of the second signal lines of the common signal lines connected to the first electrodes in the (i)th row.

[0013] In an exemplary embodiment, for any common signal line, the second signal line includes: M first connection lines and M second connection lines; the first connection lines extend in a column direction, the second connection lines extend in a row direction, the length of the first connection lines is greater than the length of the second connection lines, and M≥2;

[0014] A first end of the first first connection line is connected to one end of the first signal line, a second end of the first first connection line is connected to a first end of the first second connection line, a second end of the mth second connection line is connected to a first end of the m+1th first connection line, a second end of the m+1th first connection line is connected to a first end of the m+1th second connection line, a second end of the Mth first connection line is connected to a first end of the Mth second connection line, and a second end of the Mth second connection line is connected to a third signal line;

[0015] Two adjacent first connection lines and the second connection lines connecting two adjacent first connection lines are arranged in an opening shape, and the opening faces or turns away from the display area, 2≤m≤M-1.

[0016] In an exemplary embodiment, the length of the first connection line of the second signal line of the common signal line connected to the first electrode of the (i+1)th row is greater than the length of the first connection line of the second signal line of the common signal line connected to the first electrode of the i-th row.

[0017] In an exemplary embodiment, a distance between the third signal line of the common signal line connected to the first electrode of the (i+1)th row and the first signal line is greater than a distance between the third signal line of the common signal line connected to the first electrode of the (i)th row and the first signal line.

[0018] In an exemplary embodiment, the display area includes: a first side and a second side disposed opposite to each other and a third side and a fourth side disposed opposite to each other, the first side and the second side are arranged along a column direction, and the third side and the fourth side are arranged along a row direction;

[0019] For any common signal line, the second signal line includes: M third connection lines and M fourth connection lines; the third connection lines extend along the column direction, the fourth connection lines extend along the row direction, the length of the third connection lines is less than the length of the fourth connection lines, and M≥2;

[0020] A first end of a first third connection line is connected to one end of the first signal line, a second end of the first third connection line is connected to a first end of the first fourth connection line, a second end of an mth fourth connection line is connected to a first end of an m+1th third connection line, a second end of an m+1th third connection line is connected to a first end of an m+1th fourth connection line, a second end of an Mth third connection line is connected to a first end of an Mth fourth connection line, and a second end of an Mth fourth connection line is connected to the third signal line;

[0021] The fourth connection lines connecting two adjacent third connection lines to two adjacent third connection lines are arranged in an opening shape, and the opening faces the first side or the second side of the display area, 2≤m≤M-1.

[0022] In an exemplary embodiment, the length of the fourth connection line of the second signal line of the common signal line connected to the first electrode of the (i+1)th row is greater than the length of the fourth connection line of the second signal line of the common signal line connected to the first electrode of the i-th row.

[0023] In an exemplary embodiment, a length of any one of the first third connection line to the M-1th third connection line along the column direction is shorter than a length of the Mth third connection line along the column direction.

[0024] In an exemplary embodiment, the distance between the third signal line of the common signal line connected to the first electrode of the i+1th row and the first signal line is equal to the distance between the third signal line of the common signal line connected to the first electrode of the ith row and the first signal line.

[0025] In an exemplary embodiment, the line width of the second signal line is 2 micrometers to 4 micrometers.

[0026] In an exemplary embodiment, the invention comprises: a substrate and a first conductive layer and a second conductive layer disposed on the substrate;

[0027] The first conductive layer at least includes: a first signal line and a third signal line;

[0028] The second conductive layer at least includes: a second signal line and a first electrode;

[0029] The first conductive layer is a metal conductive layer, and the second conductive layer is a transparent conductive layer.

[0030] In an exemplary embodiment, the present invention further includes: a third conductive layer, wherein the third conductive layer is a transparent conductive layer;

[0031] The display area is further provided with a plurality of second electrodes arranged in an array, and an orthographic projection of at least one first electrode on the substrate at least partially overlaps with an orthographic projection of the plurality of second electrodes on the substrate;

[0032] The third conductive layer at least includes: a second electrode;

[0033] The first electrode is a common electrode and is multiplexed as a touch electrode, and the second electrode is a pixel electrode.

[0034] In an exemplary embodiment, the second conductive layer further includes at least: a dummy electrode and at least one row of dummy signal lines located in the frame area and on a side of the second signal line close to the display area;

[0035] Any one of the virtual electrode and the virtual signal line is located in the second conductive layer or the third conductive layer;

[0036] The virtual electrode is a slit electrode, the jth row of virtual signal lines is located on the side of the j+1th row of virtual signal lines close to the display area, for the same column of virtual signal lines, the length of the jth row of virtual signal lines is less than the length of the j+1th row of virtual signal lines, 2≤j≤K-1, K is the total number of rows of virtual signal lines.

[0037] In an exemplary embodiment, an insulating layer is further disposed between the second conductive layer and the first conductive layer, and the insulating layer is provided with a first via hole and a second via hole located in the border area;

[0038] The first signal line and the third signal line extend to the border area. For any common signal line, the first signal line is electrically connected to the second signal line through the first via hole, and the third signal line is electrically connected to the second signal line through the second via hole.

[0039] In a second aspect, the present disclosure further provides a touch display device, comprising: the above-mentioned touch display panel and a touch display chip;

[0040] The touch display chip is electrically connected to a plurality of common signal lines in the touch display panel.

[0041] Other aspects will be apparent upon reading and understanding the drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0043] Figure 1 A schematic diagram of the structure of a touch display panel provided in an embodiment of the present disclosure;

[0044] Figure 2 for Figure 1 A partial schematic diagram of a touch display panel is provided;

[0045] Figure 3 A partial schematic diagram of a touch display panel Figure 1 ;

[0046] Figure 4 Schematic diagram of the structure of the touch display panel Figure 2 ;

[0047] Figure 5 for Figure 3 An enlarged schematic diagram of the second signal line in FIG.

[0048] Figure 6 for Figure 4 An enlarged schematic diagram of the second signal line in FIG.

[0049] Figure 7 for Figure 3 and Figure 4 A schematic diagram of the structure of the border area of ​​the touch display panel provided;

[0050] Figure 8 for Figure 3 and Figure 4 A cross-sectional view of a touch display panel along the AA direction is provided;

[0051] Fig. 9 A schematic diagram of the structure of a touch display device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be described in detail in conjunction with the accompanying drawings hereinafter. Note that the embodiments can be implemented in a number of different forms. A person of ordinary skill in the relevant technical field can easily understand the fact that the methods and contents can be transformed into various forms without departing from the purpose and scope of the present disclosure. Therefore, the present disclosure should not be interpreted as being limited to the contents described in the following embodiments. In the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be arbitrarily combined with each other. In order to keep the following description of the embodiments of the present disclosure clear and concise, the present disclosure omits the detailed description of some known functions and known components. The drawings of the embodiments of the present disclosure only involve the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design.

[0053] The proportions of the drawings in this disclosure can be used as a reference in the actual process, but are not limited to this. For example: the width-to-length ratio of the channel, the thickness and spacing of each film layer, the width and spacing of each signal line can be adjusted according to actual needs. The number of pixels in the display substrate and the number of sub-pixels in each pixel are not limited to the numbers shown in the figures. The drawings described in this disclosure are only structural schematic diagrams, and one method of this disclosure is not limited to the shapes or values ​​shown in the drawings.

[0054] In the present specification, ordinal numbers such as “first”, “second” and “third” are provided to avoid confusion among constituent elements, and are not intended to limit the number.

[0055] In this specification, for the sake of convenience, the words and phrases indicating the orientation or positional relationship, such as "middle", "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., are used to illustrate the positional relationship of the constituent elements with reference to the drawings. This is only for the convenience of describing this specification and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. The positional relationship of the constituent elements is appropriately changed according to the direction in which each constituent element is described. Therefore, it is not limited to the words and phrases described in the specification, and can be appropriately replaced according to the situation.

[0056] In this specification, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate, or the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0057] In this specification, a transistor refers to an element including at least three terminals: a gate electrode, a drain electrode, and a source electrode. The transistor has a channel region between a drain electrode (drain electrode terminal, drain region, or drain electrode) and a source electrode (source electrode terminal, source region, or source electrode), and current can flow through the drain electrode, the channel region, and the source electrode. Note that in this specification, the channel region refers to a region where current mainly flows.

[0058] In this specification, the first electrode may be a drain electrode and the second electrode may be a source electrode, or the first electrode may be a source electrode and the second electrode may be a drain electrode. In the case of using transistors with opposite polarities or when the direction of current changes during circuit operation, the functions of the "source electrode" and the "drain electrode" are sometimes interchanged. Therefore, in this specification, the "source electrode" and the "drain electrode" may be interchanged.

[0059] In this specification, "electrical connection" includes the case where components are connected together through an element having some electrical function. There is no particular limitation on the "element having some electrical function" as long as it can transmit and receive electrical signals between the connected components. Examples of "element having some electrical function" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other elements having various functions.

[0060] In this specification, "parallel" means a state where the angle formed by two straight lines is greater than -10° and less than 10°, and therefore, also includes a state where the angle is greater than -5° and less than 5°. In addition, "perpendicular" means a state where the angle formed by two straight lines is greater than 80° and less than 100°, and therefore, also includes a state where the angle is greater than 85° and less than 95°.

[0061] In this specification, "film" and "layer" may be interchanged. For example, "conductive layer" may be replaced by "conductive film". Similarly, "insulating film" may be replaced by "insulating layer".

[0062] In this specification, the term "same-layer arrangement" refers to a structure formed by patterning two (or more) structures through the same patterning process, and their materials may be the same or different. For example, the materials of the precursors forming the multiple structures arranged in the same layer are the same, and the materials finally formed may be the same or different.

[0063] The triangles, rectangles, trapezoids, pentagons or hexagons in this specification are not in the strict sense, and may be approximate triangles, rectangles, trapezoids, pentagons or hexagons, etc. There may be some small deformations caused by tolerances, and there may be chamfers, arc edges and deformations.

[0064] The term "about" in the present disclosure refers to a numerical value that is not strictly limited to allow for process and measurement errors.

[0065] In an exemplary embodiment, the touch display panel may include: a touch panel and a display panel, wherein the display panel may be a liquid crystal display panel. The display panel includes: a plurality of pixels, at least one pixel includes: a pixel electrode, a common electrode and a liquid crystal layer. The liquid crystal display panel includes: an array substrate and a color filter substrate arranged opposite to each other and a liquid crystal layer arranged between the array substrate and the color filter substrate. The array substrate includes: a thin film transistor array layer, the color filter substrate may include: a color filter layer and a black matrix layer, the pixel electrode may be arranged on the array substrate and electrically connected to the thin film transistor of the thin film transistor array layer, the common electrode may be arranged on the array substrate or the color filter substrate, and the present disclosure does not make any limitation to this.

[0066] In TDDI display products, the common electrode can be divided into multiple block electrodes according to the touch resolution. The block electrodes can be reused as common electrodes and touch electrodes. Each block electrode is electrically connected to a signal line. When TDDI realizes the display function, the touch display chip provides a common electrode signal to the signal line. When TDDI realizes the touch function, the touch display chip receives the touch signal transmitted by the signal line, thereby determining the touched block electrode and making a corresponding response.

[0067] In TDDI display products, the signal lines connected to the block electrodes in different rows have different lengths. The different lengths of the signal lines lead to differences in the resistance of the signal lines, which in turn leads to differences in the common electrode signals provided to the block electrodes in different rows. This causes uneven brightness and flickering in the TDDI display products, which affects the display effect of the TDDI display products.

[0068] Figure 1 A schematic diagram of the structure of a touch display panel provided in an embodiment of the present disclosure, Figure 2 for Figure 1 A partial schematic diagram of a touch display panel is provided. Figure 1 and Figure 2 As shown, an embodiment of the present disclosure provides a touch display panel, which is provided with a display area AA and a non-display area, wherein the non-display area includes: a border area B1 and a binding area B2 arranged in sequence along a direction away from the display area, including: a plurality of first electrodes 20 arranged in an array and a plurality of common signal lines 10 extending at least partially along a column direction D1, the first electrodes 20 are located in the display area AA, the plurality of first electrodes 20 correspond one-to-one to the plurality of common signal lines 10, and the first electrodes 20 are electrically connected to the corresponding common signal lines 10.

[0069] In an exemplary embodiment, Figure 1 and Figure 2As shown, the common signal line 10 may include: a first signal line 11 at least partially located in the display area AA and a second signal line 12 located in the border area B1, the first signal line 11 is electrically connected to the second signal line 12, and the i+1th row of first electrodes 20 is located on the side of the i-th row of first electrodes 20 close to the binding area B1.

[0070] In an exemplary embodiment, the resistance of the first signal line 11 of the common signal line 10 connected to the first electrode 20 in the i+1th row is less than the resistance of the first signal line 11 of the common signal line 10 connected to the first electrode 20 in the i-th row, and the resistance of the second signal line 12 of the common signal line 10 connected to the i+1th row is greater than the resistance of the second signal line 12 of the common signal line 10 connected to the first electrode 20 in the i-th row, 1≤i≤N-1, and N is the total number of rows of the first electrodes 20.

[0071] In an exemplary embodiment, N may be 40 to 50, which is not limited in the present disclosure.

[0072] In an exemplary embodiment, the touch display panel may further include a plurality of scan lines and a plurality of data signal lines, wherein the scan lines extend in a row direction and the data lines extend in a column direction. The plurality of scan lines and the plurality of data lines intersecting each other define a plurality of pixel regions arranged regularly.

[0073] In an exemplary embodiment, the first electrode is located in at least one pixel region, that is, at least one pixel region shares one first electrode.

[0074] In exemplary embodiments, the first electrode may be a common electrode.

[0075] In an exemplary embodiment, at least one pixel region may include a thin film transistor, a pixel electrode, and a common electrode, and the thin film transistor is respectively connected to the scan line, the data line, and the pixel electrode.

[0076] In an exemplary embodiment, the thin film transistor may include: an active layer, a gate electrode, and a source-drain electrode. Exemplarily, the structure of the thin film transistor may be a top-gate structure or a bottom-gate structure, which is not limited in the present disclosure.

[0077] In an exemplary embodiment, the touch display panel may include a plurality of pixel units arranged in a matrix, at least one of the plurality of pixel units includes a first sub-pixel emitting a first color light, a second sub-pixel emitting a second color light, and a third sub-pixel emitting a third color light. Each sub-pixel is located in a pixel area.

[0078] In an exemplary embodiment, the first sub-pixel may be a red sub-pixel (R) emitting red light, the second sub-pixel may be a blue sub-pixel (B) emitting blue light, and the third sub-pixel may be a green sub-pixel (G) emitting green light. In an exemplary embodiment, the shape of the sub-pixels may be a rectangle, a rhombus, a pentagon, or a hexagon, which is not limited in the present disclosure.

[0079] In an exemplary embodiment, a pixel unit may include four sub-pixels, and the four sub-pixels may be arranged in a horizontal parallel arrangement, a vertical parallel arrangement, or a square arrangement, etc., which is not limited in the present disclosure.

[0080] In an exemplary embodiment, a pixel unit may include three sub-pixels, and the three sub-pixels may be arranged in parallel horizontally, in parallel vertically, or in a herringbone pattern, which is not limited in the present disclosure.

[0081] In an exemplary embodiment, the non-display area may be provided with a scan driver and a data driver.

[0082] In an exemplary embodiment, a plurality of scan lines are led out to the non-display area and connected to a scan driver, and a plurality of data lines are led out to the non-display area and connected to a data driver.

[0083] In an exemplary embodiment, an external control device (such as a timing controller) may provide a grayscale value and a control signal suitable for the specification of the data driver to the data driver, and the data driver may generate a data voltage to be provided to the data line using the received grayscale value and the control signal. For example, the data driver may sample the grayscale value using a clock signal, and apply a data voltage corresponding to the grayscale value to the data line in units of pixel rows.

[0084] In an exemplary embodiment, the external control device may provide a clock signal, a scan start signal, etc. suitable for the specifications of the scan driver to the scan driver, and the scan driver may generate a scan signal to be provided to the scan line using the clock signal, the scan start signal, etc. For example, the scan driver may sequentially provide a scan signal having an on-level pulse to the scan line. For example, the scan driver may be constructed in the form of a shift register, and may generate a scan signal in a manner that sequentially transmits a scan start signal provided in the form of an on-level pulse to a next-level circuit under the control of a clock signal.

[0085] In an exemplary embodiment, the touch display panel includes: a display panel. The display panel can be in Advanced Super Dimension Switch (ADS) display mode.

[0086] In an exemplary embodiment, the binding area may include a lead area, a bending area and a composite circuit area arranged in sequence along the opposite direction of the column direction D1 (away from the display area), the lead area is connected to the display area 100, the bending area is connected to the lead area, and the composite circuit area is connected to the bending area.

[0087] In an exemplary embodiment, a plurality of lead lines may be provided in the lead area, one end of the plurality of lead lines being connected to the plurality of data signal lines in the display area, and the other end of the plurality of lead lines crossing the bending area to connect to the integrated circuit in the composite circuit area, so that the integrated circuit is applied to the data signal line through the lead lines.

[0088] In an exemplary embodiment, the bending zone can be bent with a curvature, and the surface of the composite circuit area can be reversed, that is, the surface of the composite circuit area facing upward can be converted to face downward by bending the bending zone. In an exemplary embodiment, when the bending zone is bent, the composite circuit area can overlap with the display area.

[0089] In an exemplary embodiment, the composite circuit area may include an antistatic area, a driving chip area, and a binding pin area, an integrated circuit (IC) may be bound and connected to the driving chip area, and a flexible printed circuit (FPC) may be bound and connected to the binding pin area. In an exemplary embodiment, the integrated circuit may generate a driving signal required to drive the sub-pixel, and may provide the driving signal to the sub-pixel in the display area. For example, the driving signal may be a data signal that drives the luminous brightness of the sub-pixel. In an exemplary embodiment, the integrated circuit may be bound and connected to the driving chip area through an anisotropic conductive film or other means, and the width of the integrated circuit in the row direction D2 may be less than the width of the composite circuit area in the row direction D2, and the row direction D2 intersects with the column direction D1. In an exemplary embodiment, the binding pin area may be provided with a pad including a plurality of pins (PINs), and the flexible printed circuit may be bound and connected to the pad.

[0090] In an exemplary embodiment, the common signal lines are located in the display area and the non-display area, which can reduce the area of ​​the border region occupied by the touch display panel, thereby achieving a narrow border.

[0091] The present disclosure compensates for the common signal line connected to the first electrode near the binding area by setting the resistance of the first signal line of the common signal line 10 connected to the first electrode 20 of the i+1th row to be smaller than the resistance of the first signal line of the common signal line 10 connected to the first electrode 20 of the i-th row, and the resistance of the second signal line of the common signal line 10 connected to the i+1th row to be larger than the resistance of the second signal line of the common signal line 10 connected to the first electrode 20 of the i-th row, thereby reducing the difference in resistance between the common signal line connected to the first electrode of the i-th row and the common signal line connected to the first electrode of the i+1th row, thereby improving the display brightness uniformity of the TDDI display product and the display effect of the TDDI display product, thereby improving the quality and competitiveness of the TDDI display product.

[0092] In an exemplary embodiment, the resistivity of the first signal line 11 is smaller than the resistivity of the second signal line 12 .

[0093] In an exemplary embodiment, the first signal line 11 may be a metal conductive line, and the second signal line 12 may be a transparent conductive line.

[0094] In an exemplary embodiment, the common signal line 10 further includes: a third signal line 13 at least partially located in the binding area B2 , the third signal line 13 is electrically connected to the second signal line 12 , and the third signal line 13 at least partially extends along the column direction D1 .

[0095] In an exemplary embodiment, the resistivity of the third signal line 13 is smaller than the resistivity of the second signal line 12 .

[0096] In an exemplary embodiment, the third signal line 13 may be a metal conductive line.

[0097] In an exemplary embodiment, the resistance difference R between the resistance of the second signal line of the common signal line 10 connected to the i+1th row and the resistance of the second signal line of the common signal line 10 connected to the i-th row first electrode 20 satisfies R=L / S*ρ, where L is the distance between the centers of two first electrodes 20 located in adjacent rows of the same column, S is the line width of the first signal line, and ρ is the resistivity of the first signal line. The resistance difference R between the resistance of the second signal line of the common signal line 10 connected to the i+1th row and the resistance of the second signal line of the common signal line 10 connected to the i-th row first electrode 20 satisfies R=L / S*ρ, which can ensure that the resistance of any common signal line is close to the same, and there is no difference in the voltage values ​​of the signals of the first electrodes of different rows, which further improves the display brightness uniformity of the TDDI display product and improves the display effect of the TDDI display product.

[0098] In an exemplary embodiment, a difference ΔR between the resistance of the second connection line of the common signal line connected to the first electrode of the x-th row and the resistance of the second connection line of the common signal line connected to the first electrode of the y-th row may satisfy ΔR=(Lx-Ly) / S2*ρ2, wherein Lx is the total length of the second connection line of the common signal line connected to the first electrode of the x-th row, Ly is the total length of the second connection line of the common signal line connected to the first electrode of the y-th row, S2 is the line width of the second signal line, ρ2 is the resistivity of the second signal line, wherein 1≤x, y≤N, and x>y.

[0099] In an exemplary embodiment, a total length of the second connection lines of the common signal lines connected to the Nth row of first electrodes and a total length of the second connection lines of the common signal lines connected to the first row of first electrodes may differ by 180 micrometers to 220 micrometers.

[0100] In an exemplary embodiment, Figure 1 and Figure 2 As shown, the first signal line 11 extends along the column direction D1, and the length of the first signal line 11 of the common signal line 10 connected to the first electrode 20 in the i+1th row along the column direction D1 is less than the length of the first signal line 11 of the common signal line 10 connected to the first electrode 20 in the i-th row along the column direction D1.

[0101] In an exemplary embodiment, Figure 3 Schematic diagram of the structure of the touch display panel Figure 1 , Figure 4 Schematic diagram of the structure of the touch display panel Figure 2 . Figure 3 and Figure 4 Only one column of first electrodes is shown. Figure 3 and Figure 4 As shown, the second signal line 12 may be in a zigzag shape, and at least partially extends along the column direction D1.

[0102] In an exemplary embodiment, Figure 3 and Figure 4 As shown, the total length of the second signal lines 12 of the common signal lines 10 connected to the first electrodes 20 in the (i+1)th row is greater than the total length of the second signal lines 12 of the common signal lines 10 connected to the first electrodes 20 in the i-th row.

[0103] In an exemplary embodiment, Figure 5 for Figure 3 An enlarged schematic diagram of the second signal line in FIG. Figure 5As shown, for any common signal line 10, the second signal line 12 includes: M first connection lines 121 and M second connection lines 122; the first connection lines 121 extend along the column direction D1, and the second connection lines 122 extend along the row direction D2. The length of the first connection line 121 is greater than the length of the second connection line 122, and M≥2. Figure 3 and Figure 5 The description is made by taking M=5 as an example, and the present disclosure does not make any limitation to this.

[0104] In an exemplary embodiment, Figure 3 and Figure 5 As shown, the first end of the first first connection line 121 is connected to one end of the first signal line 11, the second end of the first first connection line 121 is connected to the first end of the first second connection line 122, the second end of the mth second connection line 122 is connected to the first end of the m+1th first connection line 121, the second end of the m+1th first connection line 121 is connected to the first end of the m+1th second connection line 122, the second end of the Mth first connection line 121 is connected to the first end of the Mth second connection line 122, and the second end of the Mth second connection line 122 is connected to the third signal line 13.

[0105] In an exemplary embodiment, Figure 3 As shown, two adjacent first connection lines 121 and the second connection line 122 connecting two adjacent first connection lines 121 are arranged in an opening shape, and the opening faces or turns away from the display area, 2≤m≤M-1, that is, the second signal line 12 can be arranged in an "M" shape.

[0106] In an exemplary embodiment, Figure 3 As shown, the length of the first connecting line 121 of the second signal line of the common signal line 10 connected to the first electrode 20 in the (i+1)th row is greater than the length of the first connecting line 121 of the second signal line of the common signal line 10 connected to the first electrode 20 in the i-th row.

[0107] In an exemplary embodiment, Figure 3 As shown, the distance between the third signal line 13 and the first signal line 11 of the common signal line 10 connected to the first electrode 20 in the i+1th row is greater than the distance between the third signal line 13 and the first signal line 11 of the common signal line 10 connected to the first electrode 20 in the i-th row.

[0108] In an exemplary embodiment, the display area includes: a first side and a second side disposed opposite to each other and a third side and a fourth side disposed opposite to each other, the first side and the second side are arranged along a column direction D1, and the third side and the fourth side are arranged along a row direction D2;

[0109] In an exemplary embodiment, Figure 6 for Figure 4An enlarged schematic diagram of the second signal line in FIG. Figure 6 As shown, for any common signal line 10, the second signal line 12 includes: M third connection lines 123 and M fourth connection lines 124; the third connection lines 123 extend along the column direction D1, and the fourth connection lines 124 extend along the row direction D2. The length of the third connection line 123 is less than the length of the fourth connection line 124, and M≥2. Figure 4 and Figure 6 The description is made by taking M=10 as an example, and the present disclosure does not impose any limitation on this.

[0110] like Figure 6 As shown, a first end of the first third connection line 123 is connected to one end of the first signal line 11, a second end of the first third connection line 123 is connected to a first end of the first fourth connection line 124, a second end of the mth fourth connection line 124 is connected to a first end of the m+1th third connection line 123, a second end of the m+1th third connection line 123 is connected to a first end of the m+1th fourth connection line 124, a second end of the Mth third connection line 123 is connected to a first end of the Mth fourth connection line 124, and a second end of the Mth fourth connection line 124 is connected to the third signal line 13;

[0111] In an exemplary embodiment, Figure 4 and Figure 6 As shown, two adjacent third connection lines 123 and the fourth connection line 124 connecting two adjacent third connection lines 123 are arranged in an opening shape, and the opening faces the first side or the second side of the display area, 2≤m≤M-1, that is, the second signal line 12 can be arranged in a "bow" shape.

[0112] In an exemplary embodiment, Figure 4 As shown, the length of the fourth connection line 124 of the second signal line 12 of the common signal line 10 connected to the first electrode 20 in the i+1th row is greater than the length of the fourth connection line 124 of the second signal line 12 of the common signal line 10 connected to the first electrode 20 in the i-th row.

[0113] In an exemplary embodiment, Figure 4 As shown, the length of any connection line from the first third connection line 123 to the M-1th third connection line 123 along the column direction D1 is smaller than the length of the Mth third connection line 123 along the column direction D1.

[0114] In an exemplary embodiment, Figure 4 As shown, the distance between the third signal line 13 and the first signal line 11 of the common signal line 10 connected to the first electrode 20 in the i+1th row is equal to the distance between the third signal line 13 and the first signal line 11 of the common signal line 10 connected to the first electrode 20 in the i-th row.

[0115] In an exemplary embodiment, the line width of the second signal line 12 is 2 micrometers to 4 micrometers. Exemplarily, the line width of the second signal line 12 may be 3.5 micrometers.

[0116] In an exemplary embodiment, the resistivity of the second signal line 12 may be 40 to 50 ohm·m, and illustratively, the resistivity of the second signal line 12 may be 45 ohm·m.

[0117] Figure 7 for Figure 3 and Figure 4 A schematic diagram of the structure of the border area of ​​the touch display panel is provided, Figure 8 for Figure 3 and Figure 4 A cross-sectional view of a touch display panel along the AA direction is provided. Figure 7 and Figure 8 As shown, the touch display panel may further include: a virtual electrode 30 located in the frame area and located on a side of the second signal line 12 close to the display area and at least one row of virtual signal lines 40 .

[0118] In an exemplary embodiment, Figure 8 As shown, the touch display panel may include: a substrate 110 and a first conductive layer and a second conductive layer disposed on the substrate 110.

[0119] In an exemplary embodiment, the first conductive layer may include at least a first signal line 11 and a third signal line.

[0120] In an exemplary embodiment, the second conductive layer may include at least: a second signal line 12 and a first electrode.

[0121] In an exemplary embodiment, the first conductive layer may be located on a side of the second conductive layer close to the substrate, or may be located on a side of the second conductive layer away from the substrate. Exemplarily, when the first conductive layer is located on a side of the second conductive layer close to the substrate, the first conductive layer may be disposed on the same layer as the gate electrode or the source-drain electrode of the transistor, and the present disclosure does not impose any limitation on this. Figure 3 , Figure 4 and Figure 8 The description is made by taking the example that the first conductive layer is located on the second conductive layer close to the substrate.

[0122] In an exemplary embodiment, the substrate may be a rigid substrate or a flexible substrate, wherein the rigid substrate may be, but is not limited to, one or more of glass and metal foil; the flexible substrate may be, but is not limited to, one or more of polyethylene terephthalate, polyethylene terephthalate, polyetheretherketone, polystyrene, polycarbonate, polyarylate, polyarylate, polyimide, polyvinyl chloride, polyethylene, and textile fiber. Exemplarily, the substrate may be a glass substrate.

[0123] In an exemplary embodiment, the first conductive layer may be a metal conductive layer. For example, the first conductive layer may be any one or more of silver (Ag), copper (Cu), aluminum (Al) and molybdenum (Mo), or alloy materials of the above metals, such as aluminum-neodymium alloy (AlNd) or molybdenum-niobium alloy (MoNb), and may be a single-layer structure or a multi-layer composite structure.

[0124] In an exemplary embodiment, the second conductive layer may be a transparent conductive layer. For example, the second conductive layer may be made of indium tin oxide ITO or indium zinc oxide IZO, which is not limited in the present disclosure.

[0125] In an exemplary embodiment, the display area may also be provided with a plurality of second electrodes arranged in an array, and an orthographic projection of at least one first electrode 20 on the substrate at least partially overlaps with an orthographic projection of the plurality of second electrodes on the substrate.

[0126] In an exemplary embodiment, the first electrode may be a common electrode and may be multiplexed as a touch electrode.

[0127] In exemplary embodiments, the second electrode may be a pixel electrode.

[0128] In an exemplary embodiment, the touch display panel may further include: a third conductive layer. The third conductive layer may include at least: a second electrode.

[0129] In exemplary embodiments, the third conductive layer may be located between the first conductive layer and the second conductive layer, or may be located on a side of the second conductive layer away from the substrate. Figure 8 The description is made by taking the example that the third conductive layer is located between the first conductive layer and the second conductive layer.

[0130] In an exemplary embodiment, the third conductive layer may be a transparent conductive layer. For example, the third conductive layer may be made of indium tin oxide (ITO) or indium zinc oxide, which is not limited in the present disclosure.

[0131] In an exemplary embodiment, any one of the dummy electrode 30 and the dummy signal line 40 may be located in the second conductive layer or the third conductive layer, which is not limited in the present disclosure. Figure 8 The description is made by taking the virtual electrode 30 and the virtual signal line 40 being located in the third conductive layer as an example.

[0132] In an exemplary embodiment, the shape of the dummy electrode may be similar to that of the second electrode, which is not limited in the present disclosure.

[0133] In an exemplary embodiment, the shape of the dummy signal line may be similar to that of the second signal line, which is not limited in the present disclosure.

[0134] The virtual electrode 30 and at least one row of virtual signal lines 40 provided in the present disclosure can improve the uniformity of etching of the touch display panel, improve the risk of the manufacturing process of the touch display panel and the polyimide diffusion problem of the box process, and improve the reliability of the touch display panel.

[0135] In an exemplary embodiment, the dummy electrode 30 may be a slit electrode.

[0136] In an exemplary embodiment, the j-th row of virtual signal line 40 is located on the side of the j+1-th row of virtual signal line 40 close to the display area. For the same column of virtual signal lines, the length of the j-th row of virtual signal line 40 is less than the length of the j+1-th row of virtual signal line 40, 2≤j≤K-1, and K is the total number of rows of virtual signal lines.

[0137] In an exemplary embodiment, Figure 3 and Figure 4 As shown, an insulating layer is further provided between the first conductive layer and the second conductive layer, and the insulating layer is provided with a first via hole and a second via hole located in the border area. The first signal line 11 and the third signal line 13 can extend to the border area B1, and for any common signal line 10, the first signal line 11 can be electrically connected to the second signal line 12 through the first via hole, and the third signal line 13 can be electrically connected to the second signal line 12 through the second via hole.

[0138] In an exemplary embodiment, Figure 8 The description is made by taking the example that the first conductive layer, the third conductive layer and the second conductive layer are sequentially stacked on the substrate 110. The touch display panel may also include a first insulating layer 120 and a second insulating layer 130, wherein the first insulating layer is located between the first conductive layer and the third conductive layer, and the second insulating layer is located between the third conductive layer and the second conductive layer. The insulating layer between the first conductive layer and the second conductive layer is a double-layer structure, that is, it includes the first insulating layer and the second insulating layer. Exemplarily, when the third insulating layer is located on the side of the second conductive layer away from the substrate, the insulating layer between the first conductive layer and the second conductive layer is a single-layer structure, and the present disclosure does not make any limitation on this. The setting method of the insulating layer between the first conductive layer and the second conductive layer can be determined according to the structure of the touch display panel.

[0139] Fig. 9 FIG. 1 is a schematic diagram of the structure of a touch display device provided in an embodiment of the present disclosure. Fig. 9 As shown, the touch display device provided by the embodiment of the present disclosure may include: a touch display panel 100 and a touch display chip 200 ; wherein the touch display chip 200 is electrically connected to a plurality of common signal lines 10 in the touch display panel 100 .

[0140] In an exemplary embodiment, the touch display device can be any product or component with touch and display functions, such as electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, etc.

[0141] The drawings in the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures may refer to the general design.

[0142] For the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the thickness and size of the layer or microstructure are exaggerated. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element, or there may be intermediate elements.

[0143] Although the embodiments disclosed in the present disclosure are as above, the contents described are only embodiments adopted to facilitate understanding of the present disclosure and are not intended to limit the present disclosure. Any technician in the field to which the present disclosure belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present disclosure, but the scope of patent protection of the present disclosure shall still be subject to the scope defined in the attached claims.

Claims

1. A touch display panel, comprising a display area and a non-display area, wherein the non-display area comprises: The frame area and the binding area are sequentially arranged in a direction away from the display area, characterized in that they include: a plurality of first electrodes arranged in an array and a plurality of common signal lines extending at least partially along a column direction, the first electrodes are located in the display area, the plurality of first electrodes correspond to the plurality of common signal lines one by one, and the first electrodes are electrically connected to the corresponding common signal lines; The common signal line includes: a first signal line at least partially located in the display area and a second signal line located in the border area, the first signal line is electrically connected to the second signal line, the first electrode of the i+1th row is located on the side of the first electrode of the i-th row close to the binding area, the resistance of the first signal line of the common signal line connected to the first electrode of the i+1th row is less than the resistance of the first signal line of the common signal line connected to the first electrode of the i-th row, the resistance of the second signal line of the common signal line connected to the i+1th row is greater than the resistance of the second signal line of the common signal line connected to the first electrode of the i-th row, 1≤i≤N-1, N is the total number of rows of first electrodes.

2. The touch display panel according to claim 1, characterized in that: The resistivity of the first signal line is smaller than the resistivity of the second signal line.

3. The touch display panel according to claim 2, characterized in that: The common signal line further includes: a third signal line at least partially located in the binding area, the third signal line is electrically connected to the second signal line, and the third signal line at least partially extends along the column direction; The resistivity of the third signal line is smaller than the resistivity of the second signal line.

4. The touch display panel according to any one of claims 1 to 3, characterized in that: The difference R in resistance between the second signal line of the common signal line connected to the i+1th row and the second signal line of the common signal line connected to the first electrode of the i-th row satisfies R=L / S*ρ, where L is the distance between the centers of two first electrodes located in adjacent rows of the same column, S is the line width of the first signal line, and ρ is the resistivity of the first signal line.

5. The touch display panel according to any one of claims 1 to 3, characterized in that: The first signal line extends along the column direction, and the length of the first signal line of the common signal line connected to the first electrode of the i+1th row along the column direction is shorter than the length of the first signal line of the common signal line connected to the first electrode of the ith row along the column direction.

6. The touch display panel according to claim 5, characterized in that: The second signal line is in a zigzag shape and at least partially extends along a column direction.

7. The touch display panel according to claim 6, characterized in that: The total length of the second signal lines of the common signal lines connected to the first electrodes in the (i+1)th row is greater than the total length of the second signal lines of the common signal lines connected to the first electrodes in the i-th row.

8. The touch display panel according to claim 6 or 7, characterized in that: For any common signal line, the second signal line includes: M first connection lines and M second connection lines; the first connection lines extend along the column direction, the second connection lines extend along the row direction, the length of the first connection line is greater than the length of the second connection line, and M≥2; A first end of the first first connection line is connected to one end of the first signal line, a second end of the first first connection line is connected to a first end of the first second connection line, a second end of the mth second connection line is connected to a first end of the m+1th first connection line, a second end of the m+1th first connection line is connected to a first end of the m+1th second connection line, a second end of the Mth first connection line is connected to a first end of the Mth second connection line, and a second end of the Mth second connection line is connected to a third signal line; Two adjacent first connection lines and the second connection lines connecting two adjacent first connection lines are arranged in an opening shape, and the opening faces or turns away from the display area, 2≤m≤M-1.

9. The touch display panel according to claim 8, characterized in that: The length of the first connecting line of the second signal line of the common signal line connected to the first electrode of the (i+1)th row is greater than the length of the first connecting line of the second signal line of the common signal line connected to the first electrode of the i-th row.

10. The touch display panel according to claim 9, characterized in that: The distance between the third signal line of the common signal line connected to the first electrodes in the (i+1)th row and the first signal line is greater than the distance between the third signal line of the common signal line connected to the first electrodes in the (i)th row and the first signal line.

11. The touch display panel according to claim 6 or 7, characterized in that: The display area comprises: a first side and a second side arranged opposite to each other and a third side and a fourth side arranged opposite to each other, the first side and the second side are arranged along a column direction, and the third side and the fourth side are arranged along a row direction; For any common signal line, the second signal line includes: M third connection lines and M fourth connection lines; the third connection lines extend along the column direction, the fourth connection lines extend along the row direction, the length of the third connection lines is less than the length of the fourth connection lines, and M≥2; A first end of a first third connection line is connected to one end of the first signal line, a second end of the first third connection line is connected to a first end of the first fourth connection line, a second end of an mth fourth connection line is connected to a first end of an m+1th third connection line, a second end of an m+1th third connection line is connected to a first end of an m+1th fourth connection line, a second end of an Mth third connection line is connected to a first end of an Mth fourth connection line, and a second end of an Mth fourth connection line is connected to the third signal line; The fourth connection lines connecting two adjacent third connection lines to two adjacent third connection lines are arranged in an opening shape, and the opening faces the first side or the second side of the display area, 2≤m≤M-1.

12. The touch display panel according to claim 11, characterized in that: The length of the fourth connection line of the second signal line of the common signal line connected to the first electrode in the (i+1)th row is greater than the length of the fourth connection line of the second signal line of the common signal line connected to the first electrode in the i-th row.

13. The touch display panel according to claim 11, characterized in that: The length of any connection line from the first third connection line to the M-1th third connection line along the column direction is shorter than the length of the Mth third connection line along the column direction.

14. The touch display panel according to claim 11, characterized in that: The distance between the third signal line of the common signal line connected to the first electrodes in the (i+1)th row and the first signal line is equal to the distance between the third signal line of the common signal line connected to the first electrodes in the (i)th row and the first signal line.

15. The touch display panel according to claim 1, characterized in that: The line width of the second signal line is 2 micrometers to 4 micrometers.

16. The touch display panel according to claim 3, characterized in that: include: A substrate and a first conductive layer and a second conductive layer disposed on the substrate; The first conductive layer at least includes: a first signal line and a third signal line; The second conductive layer at least includes: a second signal line and a first electrode; The first conductive layer is a metal conductive layer, and the second conductive layer is a transparent conductive layer.

17. The touch display panel according to claim 16, characterized in that: Also includes: A third conductive layer, wherein the third conductive layer is a transparent conductive layer; The display area is further provided with a plurality of second electrodes arranged in an array, and an orthographic projection of at least one first electrode on the substrate at least partially overlaps with an orthographic projection of the plurality of second electrodes on the substrate; The third conductive layer at least includes: a second electrode; The first electrode is a common electrode and is multiplexed as a touch electrode, and the second electrode is a pixel electrode.

18. The touch display panel according to claim 17, characterized in that: The second conductive layer at least further comprises: a virtual electrode located in the frame area and located on a side of the second signal line close to the display area and at least one row of virtual signal lines; Any one of the virtual electrode and the virtual signal line is located in the second conductive layer or the third conductive layer; The virtual electrode is a slit electrode, the jth row of virtual signal lines is located on the side of the j+1th row of virtual signal lines close to the display area, for the same column of virtual signal lines, the length of the jth row of virtual signal lines is less than the length of the j+1th row of virtual signal lines, 2≤j≤K-1, K is the total number of rows of virtual signal lines.

19. The touch display panel according to claim 16, characterized in that: An insulating layer is further disposed between the second conductive layer and the first conductive layer, and the insulating layer is provided with a first via hole and a second via hole located in the frame area; The first signal line and the third signal line extend to the border area. For any common signal line, the first signal line is electrically connected to the second signal line through the first via hole, and the third signal line is electrically connected to the second signal line through the second via hole.

20. A touch display device, characterized in that: include: The touch display panel and the touch display chip according to any one of claims 1 to 19; The touch display chip is electrically connected to a plurality of common signal lines in the touch display panel.

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