CN110442255B - Touch substrate and touch display device - Google Patents
Touch substrate and touch display device Download PDFInfo
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- CN110442255B CN110442255B CN201910143211.3A CN201910143211A CN110442255B CN 110442255 B CN110442255 B CN 110442255B CN 201910143211 A CN201910143211 A CN 201910143211A CN 110442255 B CN110442255 B CN 110442255B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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Abstract
The embodiment of the invention provides a touch substrate and a touch display device, relates to the technical field of touch, and can solve the problem that via holes between a first touch electrode and a first touch signal line are not uniformly distributed. The touch substrate comprises a touch structure for identifying a touch position; the touch structure comprises first touch electrodes arranged on the substrate and first touch signal lines electrically connected with each first touch electrode, wherein the first touch signal lines are arranged on the first touch electrodes in a spanning mode in the extending direction of the first touch signal lines; the touch substrate further includes: a first insulating layer disposed between the first touch electrode and the first touch signal line; the first touch signal line is electrically connected with the first touch electrode at least through a first through hole on the first insulating layer; in the extending direction of the first touch signal line, except the first touch electrode electrically connected with the first touch signal line, first blind holes are arranged on the first insulating layer between other first touch electrodes and the first touch signal line.
Description
Technical Field
The invention relates to the technical field of touch control, in particular to a touch control substrate and a touch control display device.
Background
Since the rise of touch technologies, due to the characteristics of simplicity, rapidness, humanization, and the like, the touch technologies have higher popularity, and more products with touch functions are available in the market, such as mobile phones, tablets, notebook computers, and the like.
Disclosure of Invention
Embodiments of the present invention provide a touch substrate and a touch display device, which can solve the problem of uneven distribution of via holes between a first touch electrode and a first touch signal line.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in one aspect, a touch substrate is provided, including: the touch structure is used for identifying a touch position; the touch structure comprises first touch electrodes arranged on a substrate and first touch signal lines electrically connected with each first touch electrode, wherein the first touch signal lines are arranged on the first touch electrodes in a spanning mode in the extending direction of the first touch signal lines; the touch substrate further includes: a first insulating layer disposed between the first touch electrode and the first touch signal line; the first touch signal line is electrically connected with the first touch electrode at least through a first via hole on the first insulating layer; in the extending direction of the first touch signal line, except for the first touch electrode electrically connected with the first touch signal line, first blind holes are formed in the first insulating layer between the other first touch electrodes and the first touch signal line.
In some embodiments, the first insulating layer includes a first sub-insulating layer and a second sub-insulating layer sequentially stacked and disposed on the substrate; the first via hole comprises a first sub-via hole arranged on the first sub-insulating layer and a second sub-via hole arranged on the second sub-insulating layer; orthographic projections of the first sub-via hole and the second sub-via hole on the substrate have an overlapping region; the first blind hole penetrates through the second sub-insulating layer; or, a third sub-via hole is arranged on the first sub-insulating layer, the second sub-insulating layer covers the third sub-via hole, and the second sub-insulating layer is recessed at the position of the third sub-via hole to form the first blind hole.
In some embodiments, an orthographic projection of the first touch electrode and the first via on the substrate has an overlapping area.
In some embodiments, the first via holes and the first blind holes are uniformly distributed along the extending direction of the first touch signal line.
In some embodiments, the first via hole and the orthographic projection of the first touch electrode on the substrate have no overlapping area; the touch substrate further comprises an auxiliary electrode arranged on one side of the first touch electrode, which is far away from the first touch signal line, and a second insulating layer arranged between the auxiliary electrode and the first touch electrode; the auxiliary electrode is electrically connected with the first touch electrode through a third through hole on the second insulating layer; the auxiliary electrode is electrically connected with the first touch signal line through a fourth via hole on the second insulating layer and the first via hole on the first insulating layer, and the orthographic projections of the fourth via hole and the first via hole on the substrate have an overlapping region.
In some embodiments, the first blind via comprises a first sub-blind via and a second sub-blind via; the orthographic projections of the first sub-blind holes and the second sub-blind holes on the substrate are free of overlapping areas.
In some embodiments, the auxiliary electrode and the pixel electrode are made of the same material in the same layer.
In some embodiments, the plurality of first touch electrodes are arranged along a first direction, and the first touch electrodes extend along a second direction; the first direction and the second direction are mutually crossed; the touch structure further includes: the touch control device comprises a plurality of second touch control electrodes arranged along a second direction and second touch control signal lines electrically connected with each second touch control electrode, wherein the second touch control electrodes and the second touch control signal lines extend along the first direction; the first touch electrode and the second touch electrode are insulated from each other.
In some embodiments, the first touch electrode includes a plurality of first hollow-out regions, and the second touch electrode includes a plurality of touch sub-electrodes disposed in the first hollow-out regions.
In some embodiments, the first touch electrode further comprises a plurality of second hollow-out regions; the touch substrate further comprises a plurality of signal lines, wherein part of the signal lines and the orthographic projection of the first hollow area on the substrate have an overlapping region, part of the signal lines and the orthographic projection of the second hollow area on the substrate have an overlapping region, and the signal lines having the overlapping region with the orthographic projection of the first hollow area on the substrate and the signal lines having the overlapping region with the orthographic projection of the second hollow area on the substrate are different signal lines; the signal line is a gate line or a data line.
In some embodiments, the touch substrate further includes a connection line disposed on a side of the first touch signal line away from the first touch electrode, and the connection line is electrically connected to the first touch signal line.
In some embodiments, the first touch electrodes are arranged in a matrix.
In another aspect, a touch display device is provided, which includes the touch substrate.
The embodiment of the invention provides a touch substrate and a touch display device, which comprises a first touch signal line and a first touch signal line, wherein the first touch signal line is spanned on a plurality of first touch electrodes in the extending direction of the first touch signal line, because the embodiment of the invention arranges a first via hole on a first insulating layer between the first touch signal line and the first touch electrode electrically connected with the first touch signal line so as to electrically connect the first touch electrode and the first touch signal line together, and arranges a first blind hole on a first insulating layer between other first touch electrodes and the first touch signal line in the extending direction of the first touch signal line, besides the first touch electrode electrically connected with the first touch signal line, therefore via holes such as the first via hole or the first blind hole are arranged between the first touch signal line and the plurality of first touch electrodes in the extending direction of the first touch signal line, therefore, the problem that the via holes between the first touch electrode and the first touch signal line are not uniformly distributed in the extending direction of the first touch signal line is solved, and the problems that oblique lines are bad and the uniformity of a display picture of the touch display device is influenced due to the arrangement direction of the first via holes for connecting the first touch electrode and the first touch signal line are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or technical solutions in related arts, the drawings used in the description of the embodiments or related arts will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a touch substrate provided in the related art;
fig. 2 is a first schematic structural diagram of a touch substrate according to an embodiment of the present invention;
fig. 3a is a schematic structural diagram of a touch substrate according to an embodiment of the present invention;
fig. 3b is a schematic structural diagram of a touch substrate according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a touch substrate according to a fourth embodiment of the present invention;
fig. 5 is a first schematic structural diagram illustrating an electrical connection between a first touch electrode and a first touch signal line according to an embodiment of the present invention;
fig. 6 is a first schematic structural view illustrating a first touch signal line crossing a first touch electrode and not electrically connected to the first touch electrode according to an embodiment of the present invention;
fig. 7 is a second schematic structural diagram illustrating electrical connection between a first touch electrode and a first touch signal line according to an embodiment of the present invention;
fig. 8a is a second schematic structural view illustrating that a first touch signal line crosses over a first touch electrode and is not electrically connected to the first touch electrode according to an embodiment of the present invention;
fig. 8b is a schematic structural diagram of a third embodiment of the present invention in which a first touch signal line crosses a first touch electrode and is not electrically connected to the first touch electrode;
fig. 9a is a schematic structural diagram illustrating a third example of electrical connection between a first touch electrode and a first touch signal line according to an embodiment of the present invention;
FIG. 9b is a schematic cross-sectional view along AA in FIG. 9 a;
FIG. 9c is a schematic cross-sectional view along AA in FIG. 9 a;
fig. 10 is a fourth schematic structural view illustrating that the first touch signal line crosses the first touch electrode and is not electrically connected to the first touch electrode according to the embodiment of the present invention;
FIG. 11a is a schematic cross-sectional view along direction BB in FIG. 10;
FIG. 11b is a schematic cross-sectional view along direction BB in FIG. 10;
FIG. 12a is a schematic cross-sectional view III taken along direction AA in FIG. 9 a;
fig. 12b is a schematic cross-sectional view in the BB direction of fig. 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the related art, as shown in fig. 1, the touch substrate includes a plurality of first touch electrodes 10 arranged along a first direction and a plurality of second touch electrodes 20 arranged along a second direction, the first direction and the second direction are mutually crossed, the first touch electrodes 10 extend along the second direction, the second touch electrodes 20 extend along the first direction, the first touch electrodes 10 include a plurality of first hollow-out regions 101, the second touch electrodes 20 include touch sub-electrodes 201 disposed in the first hollow-out regions 101, and the first touch electrodes 10 and the second touch electrodes 20 are mutually insulated. In order to realize a narrow frame, chips (Integrated circuits, ICs) in the touch device are disposed on the same side of the touch substrate, and thus the first touch signal lines 30 electrically connected to the first touch electrodes 10 and the second touch signal lines 40 electrically connected to the second touch electrodes 20 extend in the first direction. Since the second touch electrode 20 also extends along the first direction, as shown in fig. 1, a plurality of second Via holes (Via)60 may be uniformly formed on an insulating layer (PVX) between the second touch signal line 40 and the second touch electrode 20 in the extending direction of the second touch signal line 40, so as to electrically connect the second touch signal line 40 and the second touch electrode 20.
However, since the first touch electrodes 10 extend along the second direction, the first touch signal lines 30 extend along the first direction, and therefore, in the extending direction of the first touch signal lines 30, the first via holes 50 are formed in the insulating layer between one first touch signal line 30 and one first touch electrode 10 to electrically connect the first touch signal line 30 and the first touch electrode 10, and the first via holes 50 are not formed in the insulating layer between the first touch signal line 30 and the other touch electrodes, so that the first via holes 50 are not uniformly distributed on the entire touch substrate, and a slant line (such as a slant line shown in fig. 1) is formed along the arrangement direction of the first via holes 50, thereby affecting the uniformity of the display screen of the touch display device.
Accordingly, an embodiment of the present invention provides a touch substrate, as shown in fig. 2, fig. 3a, fig. 3b and fig. 4, including: the touch structure is used for identifying a touch position; the touch structure includes first touch electrodes 10 disposed on a substrate and first touch signal lines 30 electrically connected to each of the first touch electrodes 10, wherein the first touch signal lines 30 cross over the plurality of first touch electrodes 10 in an extending direction thereof.
In the embodiment of the invention, the first direction and the second direction are mutually crossed.
Here, the specific structure of the touch structure is not limited, so as to identify the touch position.
Two specific touch structures are provided below.
The first method comprises the following steps: as shown in fig. 2, 3a and 3b, in the case that the plurality of first touch electrodes 10 are arranged along the first direction and the first touch electrodes 10 extend along the second direction, the touch structure further includes: a plurality of second touch electrodes 20 arranged along a second direction and a second touch signal line 40 electrically connected to each of the second touch electrodes 20, the second touch electrodes 20 and the second touch signal lines 40 extending along the first direction; the first touch electrode 10 and the second touch electrode 20 are insulated from each other.
In the case that the touch structure includes the first touch electrode 10 and the second touch electrode 20, the first touch electrode 10 may be a driving electrode (Tx sensor), the second touch electrode 20 may be a sensing electrode (Rx sensor), the first touch signal line 30 electrically connected to the first touch electrode 10 may be referred to as Tx line, and the second touch signal line 40 electrically connected to the second touch electrode 20 may be referred to as Rx line; the first touch electrode 10 may be a sensing electrode, and the second touch electrode 20 may be a driving electrode.
On the basis, in some embodiments, as shown in fig. 2, the first touch electrode 10 and the second touch electrode 20 are disposed on different layers, and the first touch electrode 10 and the second touch electrode 20 are insulated from each other by an insulating layer disposed between the first touch electrode 10 and the second touch electrode 20.
In other embodiments, as shown in fig. 3a and 3b, the first touch electrode 10 and the second touch electrode 20 are disposed on the same layer. When the first touch electrode 10 and the second touch electrode 20 are disposed on the same layer, the first touch electrode 10 and the second touch electrode 20 can be simultaneously fabricated, so that the fabrication process of the touch substrate can be simplified.
When the first touch electrode 10 and the second touch electrode 20 are disposed on the same layer, the first touch electrode 10 may include a plurality of first sub-touch electrodes directly connected together, the second touch electrode 20 includes a plurality of second sub-touch electrodes disconnected from each other, the plurality of second sub-touch electrodes are connected by a bridge, and an insulating layer is disposed between the bridge and the first touch electrode 10; as shown in fig. 3a and 3b, the first touch electrode 10 includes a plurality of first hollow areas 101, the second touch electrode 20 includes a plurality of touch sub-electrodes 201(touch units), and the touch sub-electrodes 201 are disposed in the first hollow areas 101.
As shown in fig. 3b, at the intersection position of the first touch electrode 10 and the second touch electrode 20, the first touch electrode 10 includes a first hollow area 101, and the second touch electrode 20 includes a touch sub-electrode 201; as shown in fig. 3a, the first touch electrode 10 includes a plurality of first hollow-out regions 101, and the second touch electrode 20 includes a plurality of touch sub-electrodes 201.
Preferably, as shown in fig. 3a and 3b, the first touch electrode 10 includes a plurality of first hollow-out regions 101, the second touch electrode 20 includes a plurality of touch sub-electrodes 201, and the touch sub-electrodes 201 are disposed in the first hollow-out regions 101. Therefore, the first touch electrode 10 and the second touch electrode 20 can be simultaneously manufactured, and an insulating layer is not required to be manufactured between the first touch electrode 10 and the second touch electrode 20, so that a process can be saved, the manufacturing process of the touch substrate is simplified, and the manufacturing efficiency of the touch substrate is improved.
In addition, when the first touch electrode 10 includes a plurality of first hollow-out regions 101, the second touch electrode 20 includes a plurality of touch sub-electrodes 201, and the touch sub-electrodes 201 are disposed in the first hollow-out regions 101, in the case where the touch substrate is a touch display substrate, in some embodiments, the first touch electrode 10 and the second touch electrode 20 are multiplexed as a common electrode (Vcom). In this way, the first touch electrode 10 and the second touch electrode 20 can be used to implement both a touch function (touch) and a display function (display), and the touch function and the display function can be implemented simultaneously. Based on this, when the first touch electrode 10 of the touch substrate includes a plurality of first hollow-out areas 101, the second touch electrode 20 includes a plurality of touch sub-electrodes 201, and the touch sub-electrodes 201 are disposed in the first hollow-out areas 101, since the touch function and the display function can be simultaneously implemented, the embodiment of the invention can also solve the problem of insufficient charging time of a high-resolution product data line (Source), and support an active pen.
It should be noted that, since the second touch electrode 20 and the second touch signal line 40 both extend along the first direction, as shown in fig. 2, fig. 3a and fig. 3b, the second touch signal line 40 can be electrically connected to the second touch electrode 20 through a plurality of second vias 60 uniformly distributed along the extending direction of the second touch signal line 40. Since the second via holes 60 for connecting the second touch signal lines 40 and the second touch electrodes 20 are uniformly distributed throughout the touch substrate (panel), macroscopic defects of the via holes are not generated.
And the second method comprises the following steps: as shown in fig. 4, the first touch electrodes 10 are arranged in a matrix.
When the first touch electrodes 10 are arranged in a matrix, the first touch electrodes 10 may be arranged in m rows × n columns, m and n are positive integers, m is greater than or equal to 2, and n is greater than or equal to 2. Illustratively, the plurality of first touch electrodes 10 are arranged in 80 rows × 100 columns.
In the case where the touch substrate is a touch display substrate, in some embodiments, the plurality of first touch electrodes 10 are multiplexed as a common electrode.
In the embodiment of the present invention, when the plurality of first touch electrodes 10 are multiplexed as a common electrode, the plurality of first touch electrodes 10 may be used to implement both a touch function and a display function. Compared with the method for manufacturing the first touch electrode 10 and the common electrode, in the embodiment of the invention, the plurality of first touch electrodes 10 are multiplexed into the common electrode, so that the thickness of the touch substrate can be reduced.
In some embodiments, the material of the first touch electrode 10 and the second touch electrode 20 is a transparent conductive material. For example, the material of the first touch electrode 10 and the second touch electrode 20 is ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), or the like.
In the case that the touch substrate is a touch display substrate, the touch substrate further includes a Gate line (Gate) and a data line (Date). In some embodiments, the first touch signal line 30 and the second touch signal line 40 in the embodiments of the invention are made of the same material as the gate line or the data line on the touch substrate. When the first touch signal line 30, the second touch signal line 40 and the gate line are made of the same material in the same layer, the first touch signal line 30, the second touch signal line 40 and the gate line may be simultaneously manufactured. In this case, the first touch signal line 30, the second touch signal line 40, and the gate line are parallel. When the first touch signal line 30, the second touch signal line 40 and the data line are made of the same material in the same layer, the first touch signal line 30, the second touch signal line 40 and the data line may be simultaneously formed. In this case, the first touch signal line 30, the second touch signal line 40, and the data line are parallel. Preferably, the first touch signal line 30, the second touch signal line 40 and the data line are made of the same material in the same layer. It should be noted that, when the touch substrate does not include the second touch electrode 20 and the second touch signal line 40, but only includes the first touch electrode 10 and the first touch signal line 30, the first touch signal line 30 and the gate line or the data line on the touch substrate are made of the same material in the same layer.
In addition, the common electrode line (i.e., Vcom line) may be the same material as the gate line; or the same material as the data line.
As shown in fig. 5 and 6, the touch substrate further includes: a first insulating layer 70 disposed between the first touch electrode 10 and the first touch signal line 30; as shown in fig. 5, the first touch signal line 30 is electrically connected to the first touch electrode 10 at least through the first via hole 50 on the first insulating layer 70; in the extending direction of the first touch signal line 30, except for the first touch electrode 10 electrically connected to the first touch signal line 30, as shown in fig. 6, a first blind via 503 is disposed on the first insulating layer 70 between the other first touch electrodes 10 and the first touch signal line 30.
The first touch signal line 30 may be electrically connected to the first touch electrode 10 directly through the first via hole 50 on the first insulating layer 70; the first touch signal line 30 may also be electrically connected to the first touch electrode 10 through the first via hole 50 and other auxiliary structures on the first insulating layer 70.
It should be noted that the first blind hole 503 is disposed on the first insulating layer 70 between the first touch signal line 30 and the other first touch electrodes 10, and since the first touch signal line 30 and the other first touch electrodes 10 cannot be electrically connected together through the first blind hole 503, the first blind hole 503 is a virtual Via (Dummy Via) and cannot play a role in actual connection, in the extending direction of the first touch signal line 30, the first touch signal line 30 cannot be electrically connected to the other first touch electrodes 10, which results in a short circuit (short) and affects touch control.
Here, the first insulating layer 70 between the first touch electrode 10 and the first touch signal line 30 may be a layer; the present invention may also include a plurality of layers stacked one on another, and is not limited thereto.
On this basis, when a first touch signal line 30 is electrically connected to a first touch electrode 10, as shown in fig. 3b, the first touch signal line 30 is electrically connected to a first touch electrode 10 through a first via hole 50 on the first insulating layer 70; as shown in fig. 2 and 3a, one first touch signal line 30 may be electrically connected to one first touch electrode 10 through a plurality of first vias 50 on the first insulating layer 70. Fig. 3a illustrates an example in which one first touch signal line 30 is electrically connected to one first touch electrode 10 through eight first vias 50 on the first insulating layer 70. In order to increase the contact area between the first touch signal line 30 and the first touch electrode 10 and ensure the connection effectiveness between the first touch signal line 30 and the first touch electrode 10, in an embodiment of the invention, as shown in fig. 2, 3a and 4, one first touch signal line 30 is electrically connected to one first touch electrode 10 through a plurality of first vias 50 on the first insulating layer 70.
The embodiment of the present invention provides a touch substrate, including a first touch signal line 10 and a first touch signal line 30, wherein the first touch signal line 30 spans a plurality of first touch electrodes 10 in an extending direction thereof, and since the embodiment of the present invention provides a first via hole 50 on a first insulating layer 70 between the first touch signal line 30 and the first touch electrode 10 electrically connected to the first touch signal line 30 to electrically connect the first touch electrode 10 and the first touch signal line 30 together, and provides a first blind via hole 503 on the first insulating layer 70 between other first touch electrodes 10 and the first touch signal line 30 in the extending direction of the first touch signal line 30 in addition to the first touch electrode 10 electrically connected to the first touch signal line 30, a via hole such as the first via hole 50 or the first blind via hole 503 is provided between the first touch signal line 30 and the plurality of first touch electrodes 10 in the extending direction of the first touch signal line 30, therefore, the problem of uneven distribution of the via holes between the first touch electrode 10 and the first touch signal line 30 in the extending direction of the first touch signal line 30 is solved, and the problems of poor oblique lines and influence on the uniformity of a display picture of the touch display device caused by the arrangement direction of the first via holes 50 for connecting the first touch electrode 10 and the first touch signal line 30 are solved.
In some embodiments, as shown in fig. 7, 8a and 8b, the first insulating layer 70 includes a first sub-insulating layer 701 and a second sub-insulating layer 702 sequentially stacked and disposed on the substrate; as shown in fig. 7, the first via 50 includes a first sub-via 501 disposed on the first sub-insulating layer 701 and a second sub-via 502 disposed on the second sub-insulating layer 702; the orthographic projections of the first sub-via 501 and the second sub-via 502 on the substrate have an overlapping region; as shown in fig. 8a, the first blind via 503 penetrates the second sub-insulating layer 702; alternatively, as shown in fig. 8b, a third sub-via is disposed on the first sub-insulating layer 701, the second sub-insulating layer 702 covers the third sub-via, and the second sub-insulating layer 702 is recessed at a position of the third sub-via to form the first blind hole 503.
In addition, when the first blind via 503 penetrates the second sub-insulating layer 702, the first sub-insulating layer 701 and the second sub-insulating layer 702 may be formed on the substrate, and then a via hole may be formed on the second sub-insulating layer 702; in the case that the third sub-via hole is formed on the first sub-insulating layer 701, the second sub-insulating layer 702 covers the third sub-via hole, and the second sub-insulating layer 702 is recessed at the position of the third sub-via hole to form the first blind hole 503, the first sub-insulating layer 701 may be formed on the substrate, the third sub-via hole may be formed on the first sub-insulating layer 701, and finally the second sub-insulating layer 702 may be formed.
The material of the first sub insulating layer 701 and the material of the second sub insulating layer 702 may be the same or different. It is considered that, if the material of the first sub-insulating layer 701 is the same as the material of the second sub-insulating layer 702, during the process of forming (e.g., etching) the via hole in the second sub-insulating layer 702, if the process is improperly controlled, an over-etching may occur, which may cause the via hole to be also formed in the first sub-insulating layer 701, and thus a through hole may be formed in the first insulating layer 70. Based on this, in the preferred embodiment of the present invention, the material of the first sub insulating layer 701 is different from the material of the second sub insulating layer 702. Illustratively, the material of the first sub insulating layer 701 is an inorganic material, and the material of the second sub insulating layer 702 is an organic material.
When the material of the first sub-insulating layer 701 is different from the material of the second sub-insulating layer 702, the first sub-insulating layer 701 may be prevented from being affected when the via hole is formed in the second sub-insulating layer 702.
In some embodiments, as shown in fig. 5 and 7, the orthographic projections of the first touch electrode 10 and the first via hole 50 on the substrate have an overlapping area.
Since the orthographic projection of the first touch electrode 10 and the first via hole 50 on the substrate has an overlapping area, the first touch electrode 10 can be electrically connected to the first touch signal line 30 directly through the first via hole 50 on the first insulating layer 70.
In order to further improve the uniformity of the distribution of the via holes between the first touch electrode 10 and the first touch signal line 30 in the extending direction of the first touch signal line 30, so as to improve the uniformity of the display screen of the touch display device, in some embodiments, as shown in fig. 2, fig. 3a and fig. 3b, the first via holes 50 and the first blind holes 503 are uniformly distributed along the extending direction of the first touch signal line 30.
In other embodiments, as shown in fig. 9a, 9b and 9c, the first via hole 50 and the orthographic projection of the first touch electrode 10 on the substrate have no overlapping region, the touch substrate further includes an auxiliary electrode 80 disposed on a side of the first touch electrode 10 away from the first touch signal line 30, and a second insulating layer 90 disposed between the auxiliary electrode 80 and the first touch electrode 10; the auxiliary electrode 80 is electrically connected to the first touch electrode 10 through the third via 901 on the second insulating layer 90; the auxiliary electrode 80 is also electrically connected to the first touch signal line 30 through a fourth via 902 on the second insulating layer 90 and the first via 50 on the first insulating layer 70, and the fourth via 902 and an orthographic projection of the first via 50 on the substrate have an overlapping region.
In fig. 9a, a plurality of sub-pixels are defined by the gate lines 1 and the data lines 2 which are crossed horizontally and vertically, when the touch substrate is applied to a liquid crystal display device, a pixel electrode 3 is disposed in each sub-pixel, the pixel electrode 3 is electrically connected to a drain electrode of the thin film transistor 4, the data line 2 is electrically connected to a source electrode of the thin film transistor 4, and the thin film transistor 4 further includes an active layer, a gate electrode, and a gate insulating layer. Fig. 9a is a schematic structural diagram illustrating the first touch signal line 30 straddling the first touch electrode 10 electrically connected thereto.
In the case where the touch substrate includes the thin film transistor 4, the first sub insulating layer 701 may be formed of the same material as the gate insulating layer in the thin film transistor 4, so that the first sub insulating layer 701 and the gate insulating layer may be formed at the same time, and the second sub insulating layer 702 may be formed of the same material as the planarization layer on the thin film transistor 4, so that the second sub insulating layer 702 and the planarization layer may be formed at the same time.
Here, since the auxiliary electrode 80 is electrically connected to the first touch electrode 10 through the third via 901 on the second insulating layer 90, and is electrically connected to the first touch signal line 30 through the fourth via 902 on the second insulating layer 90 and the first via 50 on the first insulating layer 70, that is, the auxiliary electrode 80 is electrically connected to both the first touch electrode 10 and the first touch signal line 30, the first touch electrode 10 is electrically connected to the first touch signal line 30.
Furthermore, in some embodiments, as shown in fig. 9c, a second blind via 504 may also be formed on the first insulating layer 70. When the first insulating layer 70 includes the first sub-insulating layer 701 and the second sub-insulating layer 702 which are stacked, as shown in fig. 9c, it may be that the second blind via 504 penetrates the second sub-insulating layer 702; or, the first sub-insulating layer 701 is provided with a sub-via hole, the second sub-insulating layer 02 covers the sub-via hole, and the second sub-insulating layer 702 is recessed at the position of the sub-via hole to form the second blind hole 504.
Preferably, in the embodiment of the present invention, the orthographic projections of the second blind via 504 and the third via 901 on the substrate have an overlapping region.
Based on the above, as shown in fig. 9c, in the embodiment of the present invention, the second blind via 504 is formed on the first insulating layer 70, and the orthographic projections of the second blind via 504 and the third via 901 on the substrate have an overlapping region, so that the depths of the holes formed by the second blind via 504 and the third via 901 are substantially the same as the depths of the holes formed by the first via 50 and the fourth via 902, which is beneficial to improving the problem of uneven holes formed by the first via 50 and the fourth via 902.
On this basis, the material of the first insulating layer 70 and the material of the second insulating layer 90 may be the same; or may be different. In the case where the first insulating layer 70 includes the first insulating sub-layer 701 and the second insulating sub-layer 702 which are stacked, it is preferable in the embodiment of the present invention that the material of the first insulating sub-layer 701 and the material of the second insulating sub-layer 90 are both inorganic materials, and the material of the second insulating sub-layer 702 is an organic material.
Since the material of the first sub-insulating layer 701 and the material of the second insulating layer 90 are both inorganic materials, the first sub-via 501 on the first sub-insulating layer 701, the third via 901 and the fourth via 902 on the second insulating layer 90 can be formed simultaneously by one process. Specifically, when the third via 901 on the second insulating layer 90 is formed, the third via 901 does not extend downward due to the blocking effect of the first touch electrode 10, but since there is no overlapping area between the orthographic projections of the first touch electrode 10 and the first via 50 on the substrate, when the second insulating layer 90 is etched to form the fourth via 902, the first sub-insulating layer 701 is etched to form the first sub-via 501, so that the third via 901, the fourth via 902, and the second sub-via 502 can be formed simultaneously by using one process. The second sub-via 502 on the second sub-insulating layer 702 may be formed using another process. Based on this, as shown in fig. 9b and fig. 9c, the first sub-via 501, the third via 901, the fourth via 902, and the second sub-via 502 can be formed by two processes, which simplifies the manufacturing process of the touch substrate. In addition, when the second blind via 504 penetrates the second sub-insulating layer 702, the second blind via 504 may be formed simultaneously with the second sub-via 502 on the second sub-insulating layer 702.
Based on the above, when the first touch signal line 30 passes through the first touch electrode 10 electrically connected thereto, as seen from the top view of the touch substrate (as shown in fig. 9a), the first touch signal line 30 needs to be electrically connected to the first touch electrode 10 through two vias, one via formed by the fourth via 902 on the second insulating layer 90 and the first via 50 on the first insulating layer 70, the other via formed by the third via 901 on the second insulating layer 90, or the other via formed by the third via 901 on the second insulating layer 90 and the second blind via 504 on the first insulating layer 70. In the extending direction of the first touch signal line 30, in order to further improve the via distribution uniformity between the plurality of first touch electrodes 10 spanned by the first touch signal line 30 and the first touch signal line 30. Based on this, as shown in fig. 10, 11a and 11b, the first blind hole 503 of the present invention preferably includes a first sub blind hole 5031 and a second sub blind hole 5032; the orthographic projections of first sub-blind holes 5031 and second sub-blind holes 5032 on the substrate have no overlapping area.
Fig. 10 is a schematic structural diagram illustrating that the first touch signal line 30 crosses the first touch electrode 10, but is not electrically connected to the first touch electrode 10.
In some embodiments, as shown in fig. 11b, the auxiliary electrode 80 is further electrically connected to the first touch electrode 10 through a fifth via 903 and a sixth via 904 on the second insulating layer 90, the fifth via 903 and the first sub-blind via 5031 have an overlapping region in an orthogonal projection on the substrate, and the sixth via 904 and the second sub-blind via 5032 have an overlapping region in an orthogonal projection on the substrate.
Since the fifth via 903 and the sixth via 904 both have an overlapping region with the orthographic projection of the first touch electrode 10 on the substrate, when the fifth via 903 and the sixth via 904 on the second insulating layer 90 are formed by etching, the first sub-insulating layer 701 is not etched due to the blocking effect of the first touch electrode 10, so that the first touch electrode 10 can be prevented from being electrically connected to the first touch signal line 30.
Referring to fig. 9a and 10, along the extending direction of the first touch signal line 30, two via holes are disposed between each first touch electrode 10 and the first touch signal line 30, which are spanned by the first touch signal line 30, so as to ensure the uniform distribution of the via holes on the entire touch substrate and provide the uniformity of the display screen of the touch display device.
In some embodiments, the auxiliary electrode 80 is the same material as the pixel electrode 3.
In the embodiment of the invention, the auxiliary electrode 80 and the pixel electrode 3 are made of the same layer and the same material, so that the auxiliary electrode 80 can be manufactured while the pixel electrode 3 is manufactured, and the manufacturing process of the touch substrate is simplified.
Referring to fig. 3a and 3b, when the first touch electrode 10 only includes the first hollow area 101, since a portion of the gate line 1 passes through the first hollow area 101 and a portion of the gate line 1 does not pass through the first hollow area 101, an area of the gate line 1 passing through the first hollow area 101 coupled with the first touch electrode 10 is different from an area of the gate line 1 not passing through the first hollow area 101 coupled with the first touch electrode 10, so that the first touch electrode 10 generates a difference between a coupling of a signal on the gate line 1 passing through the first hollow area 101 and a coupling of a signal on the gate line 1 not passing through the first hollow area 101. Similarly, since a part of the data lines 2 pass through the first hollow area 101 and a part of the data lines 2 do not pass through the first hollow area 101, the coupling area of the data lines 2 passing through the first hollow area 101 and the first touch electrode 10 is different from the coupling area of the data lines 2 not passing through the first hollow area 101 and the first touch electrode 10, and thus the coupling of the first touch electrode 10 to the signals on the data lines 2 passing through the first hollow area 101 and the coupling of the signals on the data lines 2 not passing through the first hollow area 101 are different.
Based on the above, in the case that the first touch electrode 10 includes a plurality of first hollow-out regions 101, the second touch electrode 20 includes a plurality of touch sub-electrodes 201, and the touch sub-electrodes 201 are disposed in the first hollow-out regions 101, as shown in fig. 9a and 10, the first touch electrode 10 further includes a plurality of second hollow-out regions 102; the touch substrate further comprises a plurality of signal lines, wherein part of the signal lines and the orthographic projection of the first hollow area 101 on the substrate form an overlapping region, part of the signal lines and the orthographic projection of the second hollow area 102 on the substrate form an overlapping region, and the signal lines which form the overlapping region with the orthographic projection of the first hollow area 101 on the substrate and the signal lines which form the overlapping region with the orthographic projection of the second hollow area on the substrate form different signal lines; the signal line is a gate line 1 or a data line 2.
Preferably, in the embodiment of the present invention, each signal line and the orthographic projection of the first hollow area 101 or the second hollow area 102 on the substrate have an overlapping region.
In the embodiment of the present invention, the first touch electrode 10 further includes the second hollow area 102 in addition to the first hollow area 101, and a part of the signal lines and the orthographic projection of the first hollow area 101 on the substrate have an overlapping region, and a part of the signal lines and the orthographic projection of the second hollow area 102 on the substrate have an overlapping region, so that the coupling of the first touch electrode 10 to a part of signals on the signal lines having an overlapping region with the orthographic projection of the first hollow area 101 on the substrate is equivalent to the coupling of the first touch electrode 10 to a part of signals on the signal lines having an overlapping region with the orthographic projection of the second hollow area 102 on the substrate, thereby improving the problem that the coupling of the first touch electrode 10 to signals on the signal lines is different because a part of the signal lines, such as the data lines 2 or the gate lines 1, only have an overlapping region with the first hollow area 101.
Considering that the first touch electrode 10 includes the first and second hollow areas 101 and 102, since the area of the first touch electrode 10 is reduced, the resistance of the first touch electrode 10 is increased. Based on this, as shown in fig. 9a, fig. 10, fig. 12a and fig. 12b, the touch substrate further includes a connection line 5 disposed on a side of the first touch signal line 30 away from the first touch electrode 10, and the connection line 5 is electrically connected to the first touch signal line 30.
Here, the connecting line 5 is electrically connected to the first touch signal line 30, the first touch signal line 30 is electrically connected to the first touch electrode 10, and thus the connecting line 5 is also electrically connected to the first touch electrode 10.
In some embodiments, the connection line 5 is of the same material as the gate line 1. In this case, the connection line 5 and the gate line 1 may be simultaneously fabricated. In other embodiments, the connection lines 5 are made of the same material as the data lines 2. In this case, the connection line 5 and the data line 2 can be simultaneously formed.
In the embodiment of the invention, the touch substrate includes the connection line 5, and the connection line 5 is electrically connected to the first touch electrode 10 through the first touch signal line 30, so that the resistance of the first touch electrode 10 can be reduced.
The embodiment of the invention also provides a touch display device which comprises the touch substrate.
Among other things, a touch display device may be any device that displays images, whether in motion (e.g., video) or stationary (e.g., still images), and whether textual or textual. More particularly, it is contemplated that the embodiments may be implemented in or associated with a variety of electronic devices such as, but not limited to, mobile telephones, wireless devices, Personal Data Assistants (PDAs), hand-held or portable computers, GPS receivers/navigators, cameras, MP4 video players, camcorders, game consoles, wrist watches, clocks, calculators, television monitors, flat panel displays, computer monitors, auto displays (e.g., odometer display, etc.), navigators, cockpit controls and/or displays, displays of camera views (e.g., of a rear view camera in a vehicle), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., a display of images for a piece of jewelry), and so forth.
In addition, the touch display device can also be a touch display panel.
Embodiments of the present invention provide a touch display device, where the touch display device includes the touch substrate, and the touch substrate in the touch display device has the same structure and beneficial effects as the touch substrate provided in the embodiments, and the touch substrate has been described in detail in the embodiments, so that details are not repeated herein.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A touch substrate, comprising: the touch structure is used for identifying a touch position; the touch structure comprises first touch electrodes arranged on a substrate and first touch signal lines electrically connected with each first touch electrode, wherein the first touch signal lines are arranged on the first touch electrodes in a spanning mode in the extending direction of the first touch signal lines;
the touch substrate further includes: a first insulating layer disposed between the first touch electrode and the first touch signal line;
the first touch signal line is electrically connected with the first touch electrode at least through a first via hole on the first insulating layer; in the extending direction of the first touch signal line, except for the first touch electrode electrically connected with the first touch signal line, first blind holes are arranged on the first insulating layer between the other first touch electrodes and the first touch signal line;
the touch substrate further comprises a connecting wire arranged on one side of the first touch signal wire, which is far away from the first touch electrode, and the connecting wire is electrically connected with the first touch signal wire;
the plurality of first touch electrodes are arranged along a first direction, and the first touch electrodes extend along a second direction; the first direction and the second direction are mutually crossed;
the touch substrate further includes: the touch control device comprises a plurality of second touch control electrodes arranged along a second direction and second touch control signal lines electrically connected with each second touch control electrode, wherein the second touch control electrodes and the second touch control signal lines extend along the first direction; the first touch electrode and the second touch electrode are insulated from each other;
the first touch electrode comprises a plurality of first hollow-out areas, the second touch electrode comprises a plurality of touch sub-electrodes, and the touch sub-electrodes are arranged in the first hollow-out areas;
the first touch electrode further comprises a plurality of second hollow-out areas;
the touch substrate further comprises a plurality of signal lines, wherein part of the signal lines and the orthographic projection of the first hollow area on the substrate have an overlapping region, part of the signal lines and the orthographic projection of the second hollow area on the substrate have an overlapping region, and the signal lines having the overlapping region with the orthographic projection of the first hollow area on the substrate and the signal lines having the overlapping region with the orthographic projection of the second hollow area on the substrate are different signal lines; the signal line is a gate line or a data line.
2. The touch substrate according to claim 1, wherein the first insulating layer comprises a first sub-insulating layer and a second sub-insulating layer sequentially stacked on the substrate;
the first via hole comprises a first sub-via hole arranged on the first sub-insulating layer and a second sub-via hole arranged on the second sub-insulating layer; orthographic projections of the first sub-via hole and the second sub-via hole on the substrate have an overlapping region;
the first blind hole penetrates through the second sub-insulating layer; or, a third sub-via hole is arranged on the first sub-insulating layer, the second sub-insulating layer covers the third sub-via hole, and the second sub-insulating layer is recessed at the position of the third sub-via hole to form the first blind hole.
3. The touch substrate of claim 1 or 2, wherein orthographic projections of the first touch electrode and the first via on the substrate have an overlapping area.
4. The touch substrate of claim 3, wherein the first via holes and the first blind holes are uniformly distributed along an extending direction of the first touch signal line.
5. The touch substrate of claim 1 or 2, wherein the first via hole and the orthographic projection of the first touch electrode on the substrate have no overlapping area; the touch substrate further comprises an auxiliary electrode arranged on one side of the first touch electrode, which is far away from the first touch signal line, and a second insulating layer arranged between the auxiliary electrode and the first touch electrode;
the auxiliary electrode is electrically connected with the first touch electrode through a third through hole on the second insulating layer; the auxiliary electrode is electrically connected with the first touch signal line through a fourth via hole on the second insulating layer and the first via hole on the first insulating layer, and the orthographic projections of the fourth via hole and the first via hole on the substrate have an overlapping region.
6. The touch substrate of claim 5, wherein the first blind via comprises a first sub-blind via and a second sub-blind via; the orthographic projections of the first sub-blind holes and the second sub-blind holes on the substrate are free of overlapping areas.
7. The touch substrate of claim 5, wherein the auxiliary electrode and the pixel electrode are made of the same material in the same layer.
8. The touch substrate of claim 1, wherein the first touch electrodes are arranged in a matrix.
9. A touch display device comprising the touch substrate according to any one of claims 1 to 8.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910143211.3A CN110442255B (en) | 2019-02-26 | 2019-02-26 | Touch substrate and touch display device |
| US16/638,436 US11099693B2 (en) | 2019-02-26 | 2019-09-17 | Touch-sensing display substrate, touch-sensing display apparatus, method of operating touch-sensing display apparatus, and method of fabricating touch-sensing display substrate |
| US16/638,437 US11216128B2 (en) | 2019-02-26 | 2019-09-17 | Touch-sensing display substrate, touch-sensing display apparatus, method of operating touch sensing display apparatus, and method of fabricating touch-sensing display substrate |
| PCT/CN2019/106241 WO2020173082A1 (en) | 2019-02-26 | 2019-09-17 | Touch-sensing display substrate, touch-sensing display apparatus, method of operating touch sensing display apparatus, and method of fabricating touch-sensing display substrate |
| PCT/CN2019/106200 WO2020173081A1 (en) | 2019-02-26 | 2019-09-17 | Touch-sensing display substrate, touch-sensing display apparatus, method of operating touch-sensing display apparatus, and method of fabricating touch-sensing display substrate |
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| CN201910143211.3A CN110442255B (en) | 2019-02-26 | 2019-02-26 | Touch substrate and touch display device |
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| CN110442255B true CN110442255B (en) | 2021-08-27 |
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| CN111610887B (en) * | 2020-05-21 | 2024-05-28 | 京东方科技集团股份有限公司 | Touch substrate, preparation method thereof, display substrate and display device |
| JP7474654B2 (en) | 2020-07-17 | 2024-04-25 | 株式会社ジャパンディスプレイ | Display device |
| CN113157150B (en) * | 2021-03-19 | 2023-07-25 | 武汉华星光电半导体显示技术有限公司 | Touch module and display device |
| CN113282200B (en) * | 2021-05-17 | 2022-12-23 | 武汉华星光电半导体显示技术有限公司 | Display panel |
| CN113535013A (en) * | 2021-08-12 | 2021-10-22 | 京东方科技集团股份有限公司 | Touch substrate and display panel |
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