Touch display device

Abstract

The present application provides a touch display device, which includes a touch layer and a display panel, wherein the touch layer is located on the light-emitting side of the display panel, the display panel includes a plurality of sub-pixels, the touch layer includes a plurality of touch units, and each touch unit includes: a first electrode electrically connected in a first direction through a first connecting portion, the width of the first connecting portion in a direction perpendicular to the extension of the first connecting portion is greater than or equal to the width of three sub-pixels, and the first connecting portion and the first electrode are arranged in the same layer. Compared with the conventional technology, by making the first connecting portion surround at least three sub-pixels in a direction perpendicular to the extension of the first connecting portion, the impedance of the first connecting portion is reduced, thereby effectively reducing the resistance-capacitance delay of the first electrode conducting the electrical signal, increasing the touch scanning frequency, and facilitating the improvement of the touch reporting rate.

Description

Technical Field

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

[0002] Capacitive touch screens are widely used in various electronic interactive scene devices due to their high durability, long life, and support for multi-touch functions. Capacitive touch screens detect the specific location of a finger touch by detecting the change in capacitance at the finger touch location.

[0003] like Figure 1 As shown, it is a schematic diagram of a traditional touch electrode. The touch electrode includes a driving electrode Tx and a sensing electrode Rx. The driving electrode Tx and the sensing electrode Rx are both composed of metal meshes. Since the subpixel is arranged at an angle of 45 degrees, the metal meshes that constitute the driving electrode Tx and the sensing electrode Rx are multiple diamond meshes composed of metal wires inclined at 45 degrees and 135 degrees. The driving electrode Tx and the sensing electrode Rx are electrically insulated from each other. Two adjacent sensing electrodes Rx are connected by two pairs of V-shaped bridge wires 1. In order to adapt to the arrangement design of the subpixel, the V-shaped bridge wire also adopts a metal mesh design to avoid blocking the light emitted by the subpixel. Two adjacent driving electrodes Tx are formed continuously, and the two adjacent driving electrodes Tx are connected by a connecting portion 2. The driving electrode Tx, the sensing electrode Rx and the connecting portion 2 are arranged in the same layer, and the V-shaped bridge wire 1 and the sensing electrode Rx are located in different layers. In the conventional technology, in order to prevent the basic capacitance between the V-shaped bridge line 1 and the driving electrode Tx from being too large, the connecting portion 2 is made to surround a sub-pixel in a direction perpendicular to the extending direction of the connecting portion 2, so as to reduce the overlapping area between the V-shaped bridge line 1 and the driving electrode Tx. However, the connecting portion 2 surrounding a sub-pixel in a direction perpendicular to the extending direction of the connecting portion 2 will result in a larger impedance of the connecting portion 2.

[0004] Therefore, it is necessary to propose a technical solution to solve the problem of high impedance of the connection portion 2 disposed in the same layer as the driving electrode Tx. Summary of the invention

[0005] The purpose of the present application is to provide a touch display device to reduce the impedance of a first connecting portion disposed in the same layer as a first electrode.

[0006] To achieve the above object, the present application provides a touch display device, the touch display device comprising a touch layer and a display panel, the touch layer is located on the light emitting side of the display panel, the display panel comprises a plurality of sub-pixels, the touch layer comprises a plurality of touch units, each of the touch units comprises:

[0007] A first electrode is electrically connected in a first direction through a first connecting portion, wherein a width of the first connecting portion in a direction perpendicular to an extension of the first connecting portion is greater than or equal to a width of three sub-pixels, and the first connecting portion is disposed in the same layer as the first electrode.

[0008] In the above touch display device, each of the touch units further includes a second electrode bridged by a second connecting portion in a second direction, the second connecting portion includes at least one second metal wire extending in the second direction, and each of the second metal wires includes a plurality of second surrounding segments arranged along the second direction and arranged side by side.

[0009] The second connection portion and the first connection portion are located in different layers, the second electrode and the first electrode are electrically insulated, and the first direction and the second direction are different.

[0010] In the above touch display device, the orthographic projection of the second connection portion on the touch layer intersects with the orthographic projection of the first connection portion on the touch layer, and forms a plurality of grid patterns.

[0011] In the above-mentioned touch display device, the first electrode and the second electrode are composed of multiple metal grids, and in each of the grid patterns, the length of the part where the orthographic projection of the first connecting part on the touch layer and the orthographic projection of the second connecting part on the touch layer overlap is greater than 0 and less than the length of each of the metal grids.

[0012] In the above touch display device, in each of the grid patterns, the length of the overlapping portion of the orthographic projection of the first connection portion on the touch layer and the orthographic projection of the second connection portion on the touch layer is greater than 0 and less than or equal to 1 / 2 of the length of each metal grid.

[0013] In the above touch display device, each of the first connecting portions includes at least three first metal wires extending in the first direction and spaced apart from each other, and / or,

[0014] Each of the second connection portions includes a plurality of second metal wires extending in the second direction and spaced apart from each other.

[0015] In the above touch display device, each of the first connecting portions includes at least three first metal wires extending in the first direction and spaced apart from each other, each of the first metal wires includes at least one first surrounding segment arranged along the first direction, and each of the first surrounding segments of the first metal wire is a part of each of the metal grids;

[0016] Each of the second connecting portions comprises a plurality of second metal wires extending in the second direction and spaced apart from each other, and each of the second surrounding segments of each of the second metal wires is a portion of each of the metal grids;

[0017] The first surround segment of each of the first metal wires corresponds one-to-one to the second surround segment of each of the second metal wires, and the orthographic projection of each of the first surround segments on the touch layer partially overlaps with the orthographic projection of the second surround segment corresponding to the first surround segment on the touch layer and forms a grid pattern.

[0018] In the above touch display device, the length of each first surrounding segment is greater than 0 and less than or equal to 1 / 2 of the length of each metal grid, and the length of each second surrounding segment is greater than 0 and less than or equal to 1 / 2 of the length of each metal grid.

[0019] In the above touch display device, each of the first surrounding segments and each of the second surrounding segments corresponding to the first surrounding segment jointly surround one sub-pixel.

[0020] In the above touch display device, the metal mesh includes an elliptical metal mesh, and the first surrounding segment and the second surrounding segment both include elliptical arc segments.

[0021] In the above touch display device, at least one of the grid patterns is the same as one of the metal grids, or / and at least one of the grid patterns is a part of one of the metal grids.

[0022] In the above touch display device, the width of the first connection portion in a direction perpendicular to the extension direction of the first connection portion is less than or equal to the width of 10 sub-pixels.

[0023] In the above touch display device, each of the first electrodes includes two first narrowed trunks and two first trunk electrodes connected by the first connecting portion, each of the first trunk electrodes is connected to one of the first narrowed trunks, and each of the first trunk electrodes extends in the first direction;

[0024] Each of the second electrodes includes two second narrowed trunks connected by the second connecting portion and two second trunk electrodes, each of the second trunk electrodes is connected to one of the second narrowed trunks, and each of the second trunk electrodes extends in the second direction, and the first direction is perpendicular to the second direction.

[0025] In the above touch display device, the width of the first trunk electrode is greater than or equal to the width of 5 sub-pixels, the width of the first narrowed trunk in the width direction of the first trunk electrode is greater than or equal to the width of 3 sub-pixels, and the width of the first narrowed trunk along the width direction of the first trunk electrode decreases from close to the first trunk electrode to far away from the first trunk electrode;

[0026] The width of the second trunk electrode is greater than or equal to the width of 5 sub-pixels, the width of the second narrowed trunk in the width direction of the second trunk electrode is greater than or equal to the width of 3 sub-pixels, and the width of the second narrowed trunk along the width direction of the second trunk electrode decreases from close to the second trunk electrode to far away from the second trunk electrode.

[0027] In the above touch display device, each of the first electrodes further includes a first branch electrode extending from one end of the first trunk electrode close to the first connecting portion,

[0028] The second electrode further includes a second branch electrode extending from one end of the second trunk electrode close to the second connecting portion.

[0029] Each of the second branch electrodes surrounds one of the first branch electrodes adjacent to the second branch electrode.

[0030] In the above touch display device, two adjacent second branch electrodes of two adjacent touch units in the second direction are connected at one end away from the second connecting portion.

[0031] In the above touch display device, a first hollow portion is provided in the area enclosed by the second trunk electrodes and two adjacent second branch electrodes in two adjacent touch units in the second direction, a first floating electrode is provided in the first hollow portion, and the first floating electrode is electrically insulated from the first electrode and the second electrode.

[0032] In the above touch display device, a second hollow portion is provided in the area enclosed by the first trunk electrode and two adjacent second branch electrodes in two adjacent touch units in the first direction, a second floating electrode is provided in the second hollow portion, and the second floating electrode is electrically insulated from the first electrode and the second electrode.

[0033] Beneficial effects: The present application provides a touch display device, which includes a touch layer and a display panel. The touch layer is located on the light-emitting side of the display panel. The display panel includes a plurality of sub-pixels. The touch layer includes a plurality of touch units. Each touch unit includes: a first electrode electrically connected in a first direction through a first connecting portion. The width of the first connecting portion in a direction perpendicular to the extension of the first connecting portion is greater than or equal to the width of three sub-pixels. The first connecting portion and the first electrode are arranged in the same layer. Compared with the conventional technology in which the first connecting portion surrounds one sub-pixel, the present application reduces the impedance of the first connecting portion by making the first connecting portion surround at least three sub-pixels in a direction perpendicular to the extension of the first connecting portion, thereby effectively reducing the resistance-capacitance delay of the first electrode in conducting electrical signals, increasing the touch scanning frequency, and facilitating an increase in the touch reporting rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic diagram of a conventional touch electrode;

[0035] Figure 2 A schematic diagram of a touch display device of the present application;

[0036] Figure 3 This is a schematic diagram of the framework of the touch layer of this application;

[0037] Figure 4 for Figure 3 A schematic diagram of each touch unit of the touch layer shown;

[0038] Figure 5 for Figure 4 A first enlarged schematic diagram of the touch unit at the intersection of the first electrode and the second electrode;

[0039] Figure 6 For multiple Figure 3 A schematic diagram of the arrangement of the touch control unit array is shown;

[0040] Figure 7 A schematic diagram of a metal grid surrounding a sub-pixel that constitutes a first electrode and a second electrode of the present invention;

[0041] Figure 8 for Figure 4 A second enlarged schematic diagram of the touch control unit at the intersection of the first sub-electrode and the second sub-electrode is shown.

[0042] The attached diagram is as follows:

[0043] 10 display panel; 101 substrate; 102 thin film transistor array layer; 103 organic light emitting diode array layer; 104 encapsulation layer; 20 touch control component; 30 polarizer; 40 protective cover; 50 touch control layer; 501 touch control unit; 5011 first electrode; 50111 first trunk electrode; 50112 first branch electrode; 50113 first narrow trunk; 5012 second electrode; 50121 second trunk electrode; 50122 second branch electrode; 501 23 second narrowed trunk; 502 first lead; 503 second lead; 504 first connecting portion; 5041 first metal wire; 5041a first surrounding segment; 501a first metal connecting segment; 501b second metal connecting segment; 505 second connecting portion; 5051 second metal wire; 5051a second surrounding segment; 5061 first floating electrode; 5062 second floating electrode; 5063 third floating electrode; 5071 first hollow portion; 5072 second hollow portion. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0045] The present application provides a touch display device. The touch display device includes a touch component and a display panel. The touch component is used to generate a corresponding touch control signal based on the touch operation of a user's finger. The display panel is used to display a picture, and the display panel includes a plurality of sub-pixels. The touch component can be externally mounted on the display panel or embedded in the display panel. The display panel can be a liquid crystal display panel or an organic light emitting diode display panel. The touch display device can be a flexible touch display device or a rigid touch display device.

[0046] In order to facilitate the description of the technical solution of the present application, the present application is described by taking the case where the touch control component is located on the light emitting side of the display panel and the display panel is an organic light emitting diode display panel as an example.

[0047] See also Figure 2 , which is a schematic diagram of the touch display device of the present application. The touch display device includes a display panel 10, a touch component 20, a polarizer 30 and a protective cover 40. The display panel 10 includes a substrate 101, a thin film transistor array layer 102, an organic light emitting diode array layer 103 and an encapsulation layer 104.

[0048] The substrate 101 is used to provide a support carrier for the thin film transistor array layer 102 and other film layers. The substrate 101 is a polyimide layer. In other embodiments, the substrate 101 may also be a glass substrate.

[0049] The thin film transistor array layer 102 includes a plurality of thin film transistors arranged in an array. The thin film transistors serve as driving elements of the organic light emitting diodes. The thin film transistors may be polycrystalline silicon thin film transistors, metal oxide thin film transistors, or amorphous silicon thin film transistors.

[0050] The organic light emitting diode array layer 103 includes a plurality of organic light emitting diodes arranged in an array. The plurality of organic light emitting diodes arranged in an array include a red organic light emitting diode, a blue organic light emitting diode, and a green organic light emitting diode. Each organic light emitting diode is a sub-pixel, wherein the red organic light emitting diode is a red light sub-pixel R, the blue organic light emitting diode is a blue light sub-pixel B, and the green organic light emitting diode is a green light sub-pixel G. The plurality of organic light emitting diodes arranged in an array include a plurality of independent anodes, an organic light emitting layer corresponding to each anode, and a common cathode.

[0051] The encapsulation layer 104 is used to prevent water vapor and oxygen from corroding the organic light-emitting layer and the common cathode. The encapsulation layer 104 is a thin film encapsulation layer. The thickness of the thin film encapsulation layer is 2 microns to 15 microns, for example, 4 microns, 6 microns, 8 microns, 10 microns or 14 microns. In other embodiments, the encapsulation layer 104 can also be a glass encapsulation cover.

[0052] The polarizer 30 is used to reduce the reflectivity of the ambient light incident on the display panel 10, so as to improve the contrast of the touch display device during display. The polarizer 30 is a circular polarizer. The protective cover plate 40 is used to protect the polarizer 30 and other film layers. The encapsulation layer 104 is located between the touch component 20 and the organic light emitting diode array layer 103. The touch component 20 includes a touch layer 50.

[0053] See also Figure 3-Figure 6 , Figure 3 This is a schematic diagram of the framework of the touch layer of this application. Figure 4 for Figure 3 A schematic diagram of a touch control unit is shown, Figure 5 for Figure 4 The enlarged schematic diagram of the touch unit at the intersection of the first electrode and the second electrode is shown, Figure 6 For multiple Figure 3 A schematic diagram of the arrangement of the touch unit array is shown.

[0054] The touch control layer 50 includes a plurality of touch control units 501 arranged in an array, a plurality of first leads 502, and a plurality of second leads 503. The touch control display device further includes a touch control chip (not shown).

[0055] The size of the touch layer 50 along the first direction is greater than the size of the touch layer 50 along the second direction, and the first direction and the second direction are different. Each touch unit 501 includes a first electrode 5011 and a second electrode 5012, and the first electrode 5011 is electrically insulated from the second electrode 5012. Each touch unit 501 is square.

[0056] In each touch unit 501, the first electrode 5011 is electrically connected via the first connection portion 504, and the second electrode 5012 is bridged via the second connection portion 505. The first connection portion 504 is disposed in the same layer as the first electrode 5011 and the second electrode 5012, and the second connection portion 505 is located in a different layer from the first connection portion 504.

[0057] The first electrodes 5011 in the touch control units 501 arranged side by side in the first direction are electrically connected and form a first electrode channel. Both ends of each first electrode channel are connected to the first lead 502. The second electrodes 5012 in the touch control units 501 arranged side by side in the second direction are electrically connected and form a second electrode channel, and one end of each second electrode channel is connected to the second lead 503. There are multiple first electrode channels in the second direction, and multiple second electrode channels in the first direction. The number of first electrode channels in the second direction is less than the number of second electrode channels in the first direction.

[0058] In this embodiment, the first electrode 5011 is a driving electrode, and the second electrode 5012 is a sensing electrode. The number of first electrode channels is 2n, where n is an integer greater than or equal to 1, so as to improve the touch reporting rate. When the first electrode channel inputs a scan signal, usually 2, 4, 8 or 16 first electrode channels are used as a group to input the scan signal, for example, 4 first electrode channels are used as a group to input the scan signal at the same time. If the number of first electrode channels is an odd number, for example, when the number of first electrode channels is 17, when 4 first electrode channels are scanned as a group, it takes 5 scans to scan all the first electrode channels, which will increase the scan sampling time and reduce the touch reporting rate.

[0059] like Figure 4 as well as Figure 5 As shown, Figure 5The first partial enlarged schematic diagram at the intersection of the first electrode and the second electrode of the touch unit. Each first electrode 5011 includes two first narrowed trunks 50113 and two first trunk electrodes 50111 connected by the first connecting portion 504, each first trunk electrode 50111 is connected to a first narrowed trunk 50113, each first trunk electrode 50111 extends in the first direction, and the first narrowed trunk 50113 is located at the intersection of the first electrode 5011 and the second electrode 5012. The first trunk electrode 50111 is conducive to the conduction of the current parallel to the first trunk electrode 50111, reduces the impedance of the first electrode channel, reduces the time required for the touch display device to scan, and thus improves the touch reporting rate.

[0060] Each first electrode 5011 also includes a first branch electrode 50112 extending from one end of the first trunk electrode 50111 near the first connection portion 504. Each first trunk electrode 50111 extends two first branch electrodes 50112 symmetrically arranged about the first trunk electrode 50111 near the intersection of the first electrode 5011 and the second electrode 5012. The angle between the first branch electrode 50112 and the first trunk electrode 50111 is equal to 45 degrees. The first trunk electrode 50111 is rectangular. The first branch electrode 50112 surrounds at least two sub-pixels in the width direction of the first branch electrode 50112.

[0061] The width of the first trunk electrode 50111 is greater than or equal to the width of 5 sub-pixels, the width of the first narrowed trunk 50113 in the width direction of the first trunk electrode 50111 is greater than or equal to the width of 3 sub-pixels, and the width of the first narrowed trunk 50113 along the width direction of the first trunk electrode 50111 decreases from close to the first trunk electrode 50111 to far away from the first trunk electrode 50111.

[0062] Specifically, in this embodiment, since the first trunk electrode and the first narrowed trunk are both composed of metal grids, each metal grid is arranged around a sub-pixel to avoid the metal grid from blocking the light emitted by the sub-pixel, the first trunk electrode 50111 surrounds at least 5 sub-pixels along the width direction of the first trunk electrode 50111 to achieve a width of the first trunk electrode 50111 greater than or equal to the width of 5 sub-pixels, and the first narrowed trunk 50113 surrounds at least 3 sub-pixels along the width direction of the first trunk electrode 50111 to achieve a width of the first narrowed trunk 50113 greater than or equal to the width of 3 sub-pixels. The first narrowed trunk 50113 surrounds at least three sub-pixels in the width direction of the first trunk electrode 50111 to reduce the impedance of the first electrode channel at the intersection of the first electrode 5011 and the second electrode 5012, thereby reducing the resistance-capacitance delay of the first electrode channel, and the width of the first narrowed trunk 50113 is reduced to reduce the basic capacitance between the first electrode 5011 and the second electrode 5012, thereby reducing the time required for the touch layer 50 to complete the scan, thereby improving the touch reporting rate.

[0063] Each second electrode 5012 includes two second narrowed trunks 50123 and two second trunk electrodes 50121 connected by a second connecting portion 505, each second trunk electrode 50121 is connected to a second narrowed trunk 50123, and each second trunk electrode 50121 extends in the second direction, each second narrowed trunk 50123 is located at the intersection of the first electrode 5011 and the second electrode 5012, and the first direction is perpendicular to the second direction.

[0064] The second electrode 5012 also includes a second branch electrode 50122 extending from one end of the second trunk electrode 50121 close to the second connecting portion 505, and each second branch electrode 50122 surrounds a first branch electrode 50112 adjacent to the second branch electrode 50122 to increase the mutual capacitance between the first electrode 5011 and the second electrode 5012. The angle between the second branch electrode 50122 and the second trunk electrode 50121 is equal to 45 degrees. Each second trunk electrode 50121 extends two second branch electrodes 50122 symmetrically arranged about the second trunk electrode 50121 near the intersection of the first electrode 5011 and the second electrode 5012.

[0065] The first electrode 5011 is symmetrically arranged with respect to the second trunk electrode 50121 , and the second electrode 5012 is symmetrically arranged with respect to the first trunk electrode 50111 .

[0066] The width of the second trunk electrode 50121 is greater than or equal to the width of 5 sub-pixels, the width of the second narrowed trunk 50123 in the width direction of the second trunk electrode 50121 is greater than or equal to the width of 3 sub-pixels, and the width of the second narrowed trunk 50123 in the width direction along the second trunk electrode 50121 decreases from close to the second trunk electrode 50121 to away from the second trunk electrode 50121.

[0067] Specifically, since the second trunk electrode 50121 and the second narrowed trunk 50123 are both composed of metal grids, each metal grid is arranged around a sub-pixel, the second trunk electrode 50121 surrounds at least 5 sub-pixels along the width direction of the second trunk electrode 50121 to achieve a width of the second trunk electrode 50121 greater than or equal to the width of 5 sub-pixels, and the second narrowed trunk 50123 surrounds at least 3 sub-pixels along the width direction of the second trunk electrode 50121 to achieve a width of the second narrowed trunk 50123 greater than or equal to the width of 3 sub-pixels. The width of the second narrowed trunk 50123 in the width direction of the second trunk electrode 50121 decreases gradually from close to the second trunk electrode 50121 to far away from the second trunk electrode 50121, so as to reduce the impedance of the second electrode channel at the intersection of the first electrode 5011 and the second electrode 5012, so as to reduce the resistance-capacitance delay of the second electrode channel, further reduce the time required for the touch layer 50 to complete the scan, and thus improve the touch reporting rate.

[0068] In this embodiment, two adjacent second branch electrodes 50122 of two adjacent touch units 501 in the second direction are connected at one end away from the second connection portion 504, so that the second branch electrodes 50122 of the touch units 501 arranged in the same row in the second direction are electrically connected, increasing the transmission channel of the current in the second electrode 5012, reducing the impedance of the second electrode channel, and thus improving the touch reporting rate.

[0069] In this embodiment, a first hollow portion 5071 is provided in an area enclosed by the second trunk electrode 50121 and two adjacent second branch electrodes 50122 of two adjacent touch units 501 in the second direction. A first floating electrode 5061 is provided in the first hollow portion 5071. The first floating electrode 5061 is electrically insulated from the first electrode 5011 and the second electrode 5012. The first hollow portion 5071 is used to reduce the area of ​​the second electrode 5012, thereby reducing the parasitic capacitance between the second electrode 5012 and the common cathode. The first floating electrode 5061 is used to improve the uniformity of light emitted by the display panel 10 passing through the touch layer 50.

[0070] In this embodiment, a second hollow portion 5072 is provided in the area enclosed by the first trunk electrode 50111 and the two adjacent second branch electrodes 50122 in two adjacent touch units 501 in the first direction, a second floating electrode 5062 is provided in the second hollow portion 5072, and the second floating electrode 5062 is electrically insulated from the first electrode 5011 and the second electrode 5012 to reduce the parasitic capacitance between the second electrode 5012 and the common cathode. In addition, the two second branch electrodes 50122 in the two adjacent touch units 501 in the first direction are electrically insulated to avoid short circuit between the two adjacent second electrodes 5012 in the first direction.

[0071] The touch control layer 50 further includes a third floating electrode 5063, which is disposed between the first branch electrode 50112 and the second branch electrode 50122 surrounding the first branch electrode 50112. The third floating electrode 5063 is electrically insulated from the first electrode 5011 and the second electrode 5012 to avoid short circuit between the first branch electrode 50112 and the second branch electrode 50122 surrounding the first branch electrode 50112, and is beneficial to improving production yield. The third floating electrode 5063 disposed between the first branch electrode 50112 and the second branch electrode 50122 surrounds at least one sub-pixel along the width direction of the third floating electrode 5063.

[0072] In this embodiment, the first floating electrode 5061, the second floating electrode 5062 and the third floating electrode 5063 are all disposed in the same layer as the first electrode 5011 and the second electrode 5012. The first floating electrode 5061, the second floating electrode 5062, the third floating electrode 5063, the first electrode 5011 and the second electrode 5012 are all composed of metal grids.

[0073] like Figure 7 As shown, it is a schematic diagram of the metal grid surrounding the sub-pixel that constitutes the first electrode and the second electrode of the present application. In the present embodiment, the sub-pixel includes an elliptical sub-pixel and a quadrilateral sub-pixel, and the quadrilateral sub-pixel has four inward-recessed arc edges. In order to adapt to the shape of the sub-pixel, the metal grid includes a first metal grid and a second metal grid, the first metal grid is an elliptical metal grid, the second metal grid is an octagonal metal grid, and the second metal grid is composed of parts of four first metal grids and a metal connecting segment between two adjacent first metal grids. The blue light sub-pixel B and the red light sub-pixel R are both surrounded by the second metal grid. The green light sub-pixel G is surrounded by the first metal grid. It can be understood that the shape of the sub-pixel can also be a rhombus, a rectangle, etc., and correspondingly, the shape of the metal grid is a rhombus.

[0074] The width of the first connection portion 504 in a direction perpendicular to the extension direction of the first connection portion 504 is greater than or equal to the width of three sub-pixels.

[0075] Specifically, since the first connection portion 504 is composed of a metal wire, the metal wire needs to be arranged around the sub-pixels, and the first connection portion 504 surrounds at least 3 sub-pixels in a direction perpendicular to the extension direction of the first connection portion 504 to achieve that the width of the first connection portion 504 in a direction perpendicular to the extension direction of the first connection portion 504 is greater than or equal to the width of 3 sub-pixels. That is to say, in the embodiment of the present invention, "the width of the first connection portion 504 in a direction perpendicular to the extension direction of the first connection portion 504 is greater than or equal to the width of 3 sub-pixels" is directly reflected in the structure of the first connection portion, that is, the first connection portion 504 surrounds at least 3 sub-pixels in a direction perpendicular to the extension direction of the first connection portion 504. For example, the first connection portion surrounds 3 sub-pixels, 4 sub-pixels, 5 sub-pixels, and 6 sub-pixels in a direction perpendicular to the extension direction of the first connection portion 504. Figure 5 As shown, the first connection portion 504 surrounds three green sub-pixels G in a direction perpendicular to the extension direction of the first connection portion 504. Compared with the conventional technology that surrounds one sub-pixel resulting in a larger impedance of the first connection portion, the present application makes the width of the first connection portion 504 in a direction perpendicular to the extension direction of the first connection portion 504 greater than or equal to the width of three sub-pixels, so that the width of the first connection portion 504 is increased relative to the conventional technology, thereby reducing the impedance of the first connection portion 504, which is beneficial to improving the RC delay generated when the electrical signal is transmitted through the first electrode 5011, and is beneficial to increasing the touch scanning frequency, thereby facilitating improving the touch reporting rate.

[0076] It should be noted that the arrangement design of the sub-pixels on the display panel will not change, and the metal wires on the touch layer are arranged around the sub-pixels. The present application takes the sub-pixels as a reference object, increases the number of metal wires that constitute the first connecting part, and makes the metal wires adaptively surround the sub-pixels, so that the number of sub-pixels surrounded by the metal wires that constitute the first connecting part increases, and the width of the first connecting part increases relative to the traditional technology. The increase in the number of metal wires that constitute the first connecting part reduces the resistance of the first connecting part relative to the resistance of the first connecting part in the traditional technology.

[0077] Each second connection portion 505 includes at least one second metal wire 5051 extending in the second direction. Each second metal wire 5051 includes a plurality of second surrounding segments 5051a arranged along the second direction and arranged side by side. The straight line where the plurality of second surrounding segments 5051a of each second metal wire 5051 lie is parallel to the second direction.

[0078] The present application reduces the impedance of the first connection portion 504 by making the width of the first connection portion 504 in the direction perpendicular to the extension direction of the first connection portion 504 greater than or equal to the width of three sub-pixels. On this basis, if the conventional V-shaped bridge line is used to realize the electrical connection of the second electrode 5012, the basic capacitance between the V-shaped bridge line and the first electrode 5011 will increase. In view of this, compared with the conventional technology in which the V-shaped bridge line is arranged in a V shape, resulting in a large length of the V-shaped bridge line and a large overlapping area with the first electrode, the present application makes each second connection portion 505 include at least one second metal line 5051 extending along the second direction, and the multiple second surrounding segments 5051a of each second metal line 5051 are distributed in a straight line and the straight line is parallel to the second direction, and the height of each second surrounding segment 5051a in the first direction is very small, so that the length of the second metal line 5051 is shorter than the length of the V-shaped bridge line. The overlapping area between the second metal wire constituting the second connecting part 505 and the first electrode 5011 is reduced, so that the basic capacitance between the second connecting part 505 and the first electrode 5011 is reduced. By making the width of each first connecting part 504 in the direction perpendicular to the extension of the first connecting part 504 greater than or equal to the width of 3 sub-pixels, and cooperating with the second connecting part 505 including a second surrounding segment 5051a arranged in a straight line along the second direction, the resistance of the first connecting part 504 and the basic capacitance are reduced at the same time, thereby improving the touch reporting rate.

[0079] Further, in the present application, the second connection portion 505 is made to include a second surrounding segment 5051a arranged in a straight line along the second direction to shorten the length of the second connection portion 505, thereby reducing the basic capacitance formed between the second connection portion 505 and the first electrode, and at the same time, the first connection portion 504 is made to increase its width perpendicular to the extension direction of the first connection portion 504 to reduce the impedance of the first connection portion. On this basis, when and only when the width of the first connection portion 504 meets certain conditions, the resistance of the first connection portion 504 can meet the requirements, and the basic capacitance formed between the second connection portion 505 and the first electrode is not significantly increased, so that the resistance and basic capacitance of the first connection portion 504 meet the basic touch performance requirements. After a lot of research, the present application found that the width of the first connection portion 504 perpendicular to the extension direction of the first connection portion 504 is less than or equal to the width of 10 sub-pixels (specifically, the number of sub-pixels surrounded in the first connection portion structure is less than or equal to 10), which can ensure that the resistance and basic capacitance of the first connection portion 504 meet the basic touch performance requirements. If the first connection portion 504 is too wide to reduce the resistance, the basic capacitance formed between the improved second connection portion 505 and the widened first connection portion 504 will be too large. The excessive basic capacitance will have an adverse effect on the touch reporting rate.

[0080] Furthermore, when the width of the first connection portion 504 in the direction perpendicular to the extension direction of the first connection portion 504 is greater than or equal to the width of 3 sub-pixels and less than or equal to the width of 5 sub-pixels, the resistance corresponding to the first connection portion 504 of the present application is smaller than the resistance corresponding to the first connection portion surrounding a sub-pixel in the conventional technology, and the overlapping area between the first connection portion and the second connection portion of the present application is smaller than the overlapping area between the V-shaped bridge line and the first connection portion surrounding a sub-pixel in the conventional technology. The basic capacitance between the first electrode and the second electrode of the present application is smaller than that in the conventional technology. The reduction in the resistance of the first connection portion and the reduction in the basic capacitance make the touch reporting rate corresponding to the present application better than the touch reporting rate corresponding to the conventional technology solution.

[0081] Specifically, the first connecting portion 504 surrounds 3 to 5 sub-pixels in a direction perpendicular to the extension direction of the first connecting portion 504 so as to achieve a width of the first connecting portion 504 in a direction perpendicular to the extension direction of the first connecting portion 504 that is greater than or equal to the width of 3 sub-pixels and less than or equal to the width of 5 sub-pixels. That is, in the embodiment of the present invention, the direct manifestation of "the width of the first connecting portion 504 in a direction perpendicular to the extension direction of the first connecting portion 504 is greater than or equal to the width of 3 sub-pixels and less than or equal to the width of 5 sub-pixels" in the first connecting portion structure is that the first connecting portion 504 surrounds 3 to 5 sub-pixels in a direction perpendicular to the extension direction of the first connecting portion 504.

[0082] In this embodiment, each first connection portion 504 includes at least three first metal wires 5041 extending in the first direction and spaced apart from each other. Figure 7 In the metal grid shown in the figure, the present application removes the connection lines between the metal grids, and removes part of the metal grid to form at least three first metal wires 5041 spaced apart from each other, so as to avoid overlap between the removed connection lines and part of the metal grid and the second connecting portion 505, thereby increasing the basic capacitance between the first electrode 5011 and the second electrode 5012. The first metal wires 5041 spaced apart from each other refer to the first metal wires 5041 being unconnected, having a certain spacing, and not intersecting each other.

[0083] In this embodiment, each second connection portion 505 includes a plurality of second metal wires 5051 extending in the second direction and spaced apart from each other. Compared with the conventional technology in which each V-shaped bridge wire is composed of two metal wires and a connection segment connecting the two metal wires, the second connection portion 505 of the present application removes the connection segment between two adjacent second metal wires 5051 and the metal grid portion to reduce the overlapping area between the second connection portion 505 and the first electrode 5011, thereby further reducing the basic capacitance between the first electrode 5011 and the second electrode 5012. The spacing between any two of the plurality of second metal wires 5051 extending in the second direction and spaced apart from each other is equal.

[0084] Specifically, each second connection portion 505 includes three second metal wires 5051 extending in the second direction and spaced apart from each other. In other embodiments, each second connection portion 505 may also include two second metal wires 5051 extending in the second direction and spaced apart from each other. Each second connection portion 505 may also include four or five second metal wires 5051.

[0085] In other embodiments, each first connection portion 504 includes at least three first metal wires 5041 extending in the first direction and spaced apart from each other, or each second connection portion 505 includes a plurality of second metal wires 5051 extending in the second direction and spaced apart from each other.

[0086] It should be noted that if Figure 5 As shown, each first metal wire 5041 electrically connects two first narrowed trunks 50113 at the intersection of the first electrode 5011 and the second electrode 5012. Each second metal wire 5051 electrically connects two second narrowed trunks 50123 at the intersection of the first electrode 5011 and the second electrode 5012. Some metal wires located on both sides of the first connection portion 504 and close to the first connection portion 504 (such as two metal wires on both sides of the three first metal wires 5041) are arranged in the same layer as the first connection portion 504. Since the metal wire is disconnected from the second electrode through the break of the metal grid in the second direction (as shown in the square dotted box), the metal wire is not electrically connected in the first direction, so the metal wire does not belong to the first metal wire.

[0087] The orthographic projection of the second connection part 505 on the touch layer 50 intersects with the orthographic projection of the first connection part 504 on the touch layer 50, and forms a plurality of grid patterns. The grid pattern surrounds the orthographic projections of at least three sub-pixels on the touch layer in the second direction. Compared with the conventional technology in which the metal grid constituting the first connection part surrounds one sub-pixel in the second direction, the orthographic projections of at least three sub-pixels on the touch layer in the second direction of the grid pattern can effectively reduce the impedance of the first electrode channel, thereby effectively reducing the charging time of the basic capacitance formed between the first electrode and the second electrode on the touch layer, thereby increasing the scanning frequency of the first electrode and the second electrode of the touch screen, which is conducive to achieving a high touch reporting rate.

[0088] In each grid pattern, the length of the portion where the orthographic projection of the first connection portion 504 on the touch layer 50 overlaps with the orthographic projection of the second connection portion 505 on the touch layer 50 is greater than 0 and less than the length of each metal grid. Compared with the conventional technology, when the second connection portion 505 is a V-shaped bridge line, the overlapping portion between the second connection portion 505 and the first electrode is a plurality of metal grids. In the present application, the length corresponding to the overlapping portion between the first connection portion 504 and the second connection portion 505 in each grid pattern is less than the length of each metal grid, which can reduce the basic capacitance between the first electrode 5011 and the second electrode 5012.

[0089] Furthermore, in each grid pattern, the length of the portion where the orthographic projection of the first connecting portion 504 on the touch layer 50 overlaps with the orthographic projection of the second connecting portion 505 on the touch layer 50 is greater than 0 and less than or equal to 1 / 2 of the length of each metal grid, so as to further reduce the basic capacitance between the first electrode 5011 and the second electrode 5012.

[0090] In this embodiment, each first metal wire 5041 includes at least one first surrounding segment 5041a arranged along the first direction, and each first surrounding segment 5041a of the first metal wire 5041 is a part of each metal grid;

[0091] Each second surrounding segment 5051a of each second metal wire 5051 is a portion of each metal mesh;

[0092] The first surround segment 5041a of each first metal wire 5041 corresponds to the second surround segment 5051a of each second metal wire 5051 one by one, and the orthographic projection of each first surround segment 5041a on the touch layer 50 and the orthographic projection of the second surround segment 5051a corresponding to the first surround segment 5041a on the touch layer 50 partially overlap and form a grid pattern.

[0093] Further, each first metal wire 5041 includes a plurality of first surrounding segments 5041a arranged along the first direction, two adjacent first surrounding segments 5041a in the first direction are connected by a first metal connecting segment 501a, the first metal connecting segment 501a is linear, and two first surrounding segments 5041a connected to the same first metal connecting segment 501a are located on opposite sides of the first metal connecting segment 501a. Each second metal wire 5051 includes a plurality of second surrounding segments 5051a arranged along the second direction, two adjacent second surrounding segments 5051a in the second direction are connected by a second metal connecting segment 501b, the second metal connecting segment 501b is linear, and two second surrounding segments 5051a connected to the same second metal connecting segment 501b are located on the same side of the second metal connecting segment 501b.

[0094] It should be noted that the first surrounding segment 5041a and the second surrounding segment 5051a of the present application are metal lines surrounding the sub-pixel, and the first surrounding segment 5041a and the second surrounding segment 5051a can be straight lines, for example, when the metal grid is a diamond metal grid, the first surrounding segment 5041a and the second surrounding segment 5051a can also be curves, for example, when the metal grid includes an elliptical metal grid. In addition, the first metal line 5041 constituting the first connecting portion 504 is formed by removing part of the metal grid and then retaining the remaining part, for example, removing part of the connecting segment of the metal grid in the second direction, and then removing part of each metal grid while retaining the first surrounding segment 5041a and the first metal connecting segment 501a, so as to form a first metal line spaced apart from each other.

[0095] In this embodiment, each first surrounding segment 5041a and each second surrounding segment 5051a corresponding to the first surrounding segment 5041a surround a sub-pixel together. Figure 5 As shown, each first surrounding segment 5041a and each corresponding second surrounding segment 5051a together surround a green sub-pixel G. When the metal grid includes an elliptical metal grid, the first surrounding segment 5041a and the second surrounding segment 5051a both include elliptical arc segments, and each grid pattern is a portion of a metal grid.

[0096] The length of each first surround segment 5041a is greater than 0 and less than or equal to 1 / 2 of the length of each metal grid, and the length of each second surround segment 5051a is greater than 0 and less than or equal to 1 / 2 of the length of each metal grid, so as to reduce the overlapping area between each first surround segment 5041a and the corresponding second surround segment 5051a.

[0097] Specifically, the length of each first surround segment 5041a and each second surround segment 5051a is equal to 1 / 2 of the length of a metal grid, and the length of the part where the orthographic projection of each first surround segment 5041a on the touch layer 50 and the orthographic projection of the second surround segment 5051a corresponding to the first surround segment 5041a on the touch layer 50 overlap is equal to 1 / 4 of the length of each metal grid, so as to minimize the overlapping area between the first connecting portion 504 and the second connecting portion 505, thereby minimizing the basic capacitance between the first electrode 5011 and the second electrode 5012. It can be understood that, by adjusting the length of at least one of the first surround segment 5041a and the second surround segment 5041b, the length of the portion where the orthographic projection of each first surround segment 5041a on the touch layer 50 overlaps with the orthographic projection of the second surround segment 5051a corresponding to the first surround segment 5041a on the touch layer 50 can also be greater than 1 / 4 of the length of each metal grid and less than 1 / 2 of the length of each metal grid, for example, 9 / 20 of the length of each metal grid, or 5 / 12 of the length of each metal grid.

[0098] like Figure 8 As shown, it is Figure 4 The second enlarged schematic diagram of the touch unit at the intersection of the first electrode and the second electrode is shown. The length of the part where the orthographic projection of each first surrounding segment 5041a on the touch layer 50 overlaps with the orthographic projection of the second surrounding segment 5051a corresponding to the first surrounding segment 5041a on the touch layer 50 is equal to Figure 5 The difference is that each grid pattern composed of the orthographic projection of each first surrounding segment 5041a on the touch layer 50 and the orthographic projection of the second surrounding segment 5051a corresponding to the first surrounding segment 5041a on the touch layer 50 is the same as each metal grid, that is, each grid pattern is exactly a metal grid, for example, the grid pattern includes an elliptical metal grid and an octagonal metal grid, and the light emitted by the display panel has optical uniformity after passing through this area. The length of the first surrounding segment 5041a is greater than 1 / 2 of the length of a metal grid and less than the length of a metal grid, and the length of the second surrounding segment 5051a is equal to 1 / 2 of the length of a metal grid.

[0099] It should be noted that the design of the first connection portion and the second connection portion of the present application can also be applicable to the case where the sub-pixels are traditional rhombus, rectangular or oblong, and the corresponding metal grid is rhombus. The first connection portion 504 is made to surround at least three sub-pixels in the second direction, and the traditional V-shaped bridge line is adjusted to a metal surround segment arranged along the first direction to reduce the basic capacitance, thereby reducing the resistance of the first connection portion while reducing the basic capacitance between the first electrode and the second electrode. The two cooperate to improve the reporting rate of the touch display device.

[0100] The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technical personnel in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A touch display device, characterized in that: The touch display device comprises a touch layer and a display panel, wherein the touch layer is located at a light-emitting side of the display panel, the display panel comprises a plurality of sub-pixels, and the touch layer comprises a plurality of touch units, each of which comprises: A first electrode is electrically connected in a first direction through a first connecting portion, wherein the first connecting portion surrounds at least three adjacent sub-pixels in a direction perpendicular to an extending direction of the first connecting portion, and the first connecting portion is disposed in the same layer as the first electrode.

2. The touch display device according to claim 1, characterized in that: Each of the touch control units further includes a second electrode bridged by a second connecting portion in a second direction, the second connecting portion includes at least one second metal wire extending in the second direction, and each of the second metal wires includes a plurality of second surrounding segments arranged and arranged side by side along the second direction. The second connection portion and the first connection portion are located in different layers, the second electrode and the first electrode are electrically insulated, and the first direction and the second direction are different.

3. The touch display device according to claim 2, characterized in that: The orthographic projection of the second connection portion on the touch layer intersects with the orthographic projection of the first connection portion on the touch layer, and forms a plurality of grid patterns.

4. The touch display device according to claim 3, characterized in that: The first electrode and the second electrode are composed of a plurality of metal grids, In each of the grid patterns, a length of a portion where an orthographic projection of the first connection portion on the touch layer overlaps with an orthographic projection of the second connection portion on the touch layer is greater than 0 and less than a length of each of the metal grids.

5. The touch display device according to claim 4, characterized in that: In each of the grid patterns, a length of a portion where an orthographic projection of the first connection portion on the touch layer overlaps an orthographic projection of the second connection portion on the touch layer is greater than 0 and less than or equal to 1 / 2 of a length of each of the metal grids.

6. The touch display device according to claim 4, characterized in that: Each of the first connecting portions includes at least three first metal wires extending in the first direction and spaced apart from each other, and / or, Each of the second connection portions includes a plurality of second metal wires extending in the second direction and spaced apart from each other.

7. The touch display device according to any one of claims 4 to 6, characterized in that: Each of the first connecting portions includes at least three first metal wires extending in the first direction and spaced apart from each other, each of the first metal wires includes at least one first surrounding segment arranged along the first direction, and each of the first surrounding segments of the first metal wires is a part of each of the metal grids; Each of the second connecting portions comprises a plurality of second metal wires extending in the second direction and spaced apart from each other, and each of the second surrounding segments of each of the second metal wires is a portion of each of the metal grids; The first surround segment of each of the first metal wires corresponds one-to-one to the second surround segment of each of the second metal wires, and the orthographic projection of each of the first surround segments on the touch layer partially overlaps with the orthographic projection of the second surround segment corresponding to the first surround segment on the touch layer and forms a grid pattern.

8. The touch display device according to claim 7, characterized in that: The length of each of the first surrounding segments is greater than 0 and less than or equal to 1 / 2 of the length of each of the metal meshes, and the length of each of the second surrounding segments is greater than 0 and less than or equal to 1 / 2 of the length of each of the metal meshes.

9. The touch display device according to claim 7, characterized in that: Each of the first surrounding segments and each of the second surrounding segments corresponding to the first surrounding segment jointly surround one sub-pixel.

10. The touch display device according to claim 7, characterized in that: The metal mesh comprises an elliptical metal mesh, and the first surrounding segment and the second surrounding segment both comprise elliptical arc segments.

11. The touch display device according to claim 4, characterized in that: At least one of the mesh patterns is the same as one of the metal meshes, or / and at least one of the mesh patterns is part of one of the metal meshes.

12. The touch display device according to claim 1 or 2, characterized in that: The width of the first connection portion in a direction perpendicular to an extension direction of the first connection portion is less than or equal to a width of 10 sub-pixels.

13. The touch display device according to claim 2, characterized in that: Each of the first electrodes includes two first narrowed trunks connected by the first connecting portion and two first trunk electrodes, each of the first trunk electrodes is connected to one of the first narrowed trunks, and each of the first trunk electrodes extends in the first direction; Each of the second electrodes includes two second narrowed trunks connected by the second connecting portion and two second trunk electrodes, each of the second trunk electrodes is connected to one of the second narrowed trunks, and each of the second trunk electrodes extends in the second direction, and the first direction is perpendicular to the second direction.

14. The touch display device according to claim 13, characterized in that: The width of the first trunk electrode is greater than or equal to the width of five sub-pixels, the width of the first narrowed trunk in the width direction of the first trunk electrode is greater than or equal to the width of three sub-pixels, and the width of the first narrowed trunk along the width direction of the first trunk electrode decreases from close to the first trunk electrode to far away from the first trunk electrode; The width of the second trunk electrode is greater than or equal to the width of 5 sub-pixels, the width of the second narrowed trunk in the width direction of the second trunk electrode is greater than or equal to the width of 3 sub-pixels, and the width of the second narrowed trunk along the width direction of the second trunk electrode decreases from close to the second trunk electrode to far away from the second trunk electrode.

15. The touch display device according to claim 13, characterized in that: Each of the first electrodes further includes a first branch electrode extending from one end of the first trunk electrode close to the first connecting portion, The second electrode further includes a second branch electrode extending from one end of the second trunk electrode close to the second connecting portion. Each of the second branch electrodes surrounds one of the first branch electrodes adjacent to the second branch electrode.

16. The touch display device according to claim 15, characterized in that: Two adjacent second branch electrodes of two adjacent touch control units in the second direction are connected at one end away from the second connecting portion.

17. The touch display device according to claim 15 or 16, characterized in that: A first hollow portion is provided in an area enclosed by the second trunk electrodes and two adjacent second branch electrodes in two adjacent touch control units in the second direction. A first floating electrode is provided in the first hollow portion. The first floating electrode is electrically insulated from the first electrode and the second electrode.

18. The touch display device according to claim 15, characterized in that: A second hollow portion is provided in the area enclosed by the first trunk electrode and two adjacent second branch electrodes in two adjacent touch control units in the first direction. A second floating electrode is provided in the second hollow portion. The second floating electrode is electrically insulated from the first electrode and the second electrode.

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