CN112612375B - Touch panel, touch display and manufacturing method of touch display - Google Patents
Touch panel, touch display and manufacturing method of touch display Download PDFInfo
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- CN112612375B CN112612375B CN202011611011.5A CN202011611011A CN112612375B CN 112612375 B CN112612375 B CN 112612375B CN 202011611011 A CN202011611011 A CN 202011611011A CN 112612375 B CN112612375 B CN 112612375B
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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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- 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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
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- Position Input By Displaying (AREA)
Abstract
The application discloses a touch panel, a touch display and a manufacturing method of the touch display. The touch panel includes: the substrate comprises a touch area and a non-touch area arranged around the touch area; the touch control device comprises a plurality of first touch control channels, a plurality of second touch control channels and a plurality of first touch control switches, wherein the first touch control channels are arranged in a first direction in a touch control area, each first touch control channel comprises a plurality of first electrode units arranged in a second direction, adjacent first electrode units are electrically connected through a first electric connection part, and the second direction is intersected with the first direction; the driver is arranged in the non-touch area and is positioned at one side of the plurality of touch areas along the first direction; at least part of the area in the touch area is gradually reduced in width along the first direction of the first electric connection parts of the first touch channels in the direction away from the driver along the first direction. According to the touch panel, the inherent capacitance of the touch electrode is reduced by reducing the width of the electric connection part along the direction away from the driver, and the sensitivity of the touch panel away from the driver is improved by increasing the proportion of the change capacitance caused by touch.
Description
Technical Field
The application belongs to the technical field of touch control, and particularly relates to a touch panel, a touch display and a manufacturing method of the touch display.
Background
With the demands of market application, the trend of large-size touch display screens is more and more obvious. Along with the larger and larger size of the touch display screen, the distance between the touch channel and the driver is larger and larger, so that the influence of the impedance of the touch channel on the electric signal conduction is more and more obvious, and under the same touch condition, the further away from the driver, the less obvious is the change of the electric signal, so that the sensitivity of the touch display screen is lower, and the use of the touch display screen is directly influenced.
Disclosure of Invention
The embodiment of the application provides a touch panel, a touch display and a method and equipment for manufacturing the touch display, which can reduce the total impedance of a touch channel and improve the sensitivity of a part of the touch display far away from a driver.
In a first aspect, there is provided a touch panel including: the substrate comprises a touch area and a non-touch area arranged around the touch area; the touch control device comprises a plurality of first touch control channels, a plurality of second touch control channels and a plurality of first touch control switches, wherein the first touch control channels are arranged in a first direction in a touch control area, each first touch control channel comprises a plurality of first electrode units arranged in a second direction, adjacent first electrode units are electrically connected through a first electric connection part, and the second direction is intersected with the first direction; the driver is arranged in the non-touch area and is positioned at one side of the plurality of touch areas along the first direction; at least part of the area in the touch area is gradually reduced in width along the first direction of the first electric connection parts of the first touch channels in the direction away from the driver along the first direction.
In a possible implementation manner, the touch area includes a first area and a second area adjacent to each other along a first direction, and the first area is located at a side of the second area away from the driver; in the first area, in a direction away from the driver along a first direction, the widths of the first electric connection parts of the plurality of first touch channels along the first direction are gradually decreased; in the second region, the width of each first electrical connection portion along the first direction is equal.
In one possible implementation, the non-touch area includes: the driver is electrically connected with the first touch channel through the signal wires; the ground wire is positioned at one side of the signal wire far away from the touch control area; in the direction away from the driver along the first direction, the distance between the part of the signal line, which is positioned at two sides of the touch area along the second direction, and the ground line increases progressively.
In a possible implementation manner, the touch panel further includes: the second touch channels are arranged in the touch area and are insulated from the first touch channels, and orthographic projections of the second touch channels on the substrate are intersected with orthographic projections of the first touch channels on the substrate.
In a possible implementation manner, the touch panel further includes: the cover plate, the first touch channel and the second touch channel are located on the cover plate.
In a possible implementation manner, the substrate includes: the first touch control channel is positioned on one surface of the first sub-substrate, which faces the cover plate; the second touch control channel is positioned on one surface of the second sub-substrate, which faces the cover plate; the second sub-substrate is positioned on one surface of the first sub-substrate, which is away from the cover plate.
In one possible implementation manner, the cover plate of the touch panel is attached to the first sub-substrate and the first sub-substrate is attached to the second sub-substrate through optical colloid.
In one possible implementation manner, the first touch channel and the second touch channel are respectively located on two opposite sides of the substrate; the first touch channel is located on one surface of the substrate, facing the cover plate.
In one possible implementation manner, the first touch channel and the second touch channel are both located at one side of the substrate facing the cover plate; and the first touch channel and the second touch channel are in insulating fit.
In one possible implementation manner, the cover plate and the substrate of the touch panel are attached by optical colloid.
In a second aspect, a touch display is provided, including: the touch panel; the display module is a liquid crystal display module, and the touch panel is positioned on the light emitting side of the display module; the touch panel and the display module are attached through optical colloid.
In a third aspect, a method for manufacturing a touch display is provided, including: providing a substrate; forming a plurality of first touch channels in a touch area of a substrate, wherein the plurality of first touch channels are arranged along a first direction, each first touch channel comprises a plurality of first electrode units arranged along a second direction, adjacent first electrode units are electrically connected through a first electric connection part, and the second direction is intersected with the first direction; and binding and connecting a driver in a non-touch area of the substrate, wherein the driver is positioned at one side of the touch areas along the first direction, and the widths of the first electric connection parts of the first touch channels along the first direction are gradually decreased in the direction away from the driver along the first direction in at least part of the touch areas.
In a possible implementation manner, the method further includes: and forming a plurality of second touch channels in the touch area of the substrate, wherein the second touch channels are arranged in an insulating way with the first touch channels, and the orthographic projection of the second touch channels on the substrate is intersected with the orthographic projection of the first touch channels on the substrate.
In one possible implementation manner, the method for manufacturing the touch display further includes: and the substrate provided with the first touch control channel and the second touch control channel is firstly attached to the cover plate and then attached to the display module.
Compared with the prior art, the touch panel, the touch display and the manufacturing method of the touch display provided by the embodiment of the application reduce the inherent capacitance of the touch electrode by reducing the width of the electric connection part along the direction away from the driver, so that the proportion of the relative total capacitance of the variable capacitance caused by touch is increased when the touch is performed, and the sensitivity of the touch panel away from the driver is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic top view of a first touch channel of a touch panel according to an embodiment of the disclosure.
Fig. 2 is a schematic partial enlarged view of a first touch channel of a touch panel according to an embodiment of the disclosure.
Fig. 3 is a schematic view illustrating a touch panel according to an embodiment of the disclosure.
Fig. 4 is a schematic layout diagram of signal lines and ground lines of a touch panel according to an embodiment of the present application.
Fig. 5 is a schematic top view of a second touch channel of the touch panel according to an embodiment of the disclosure.
Fig. 6 is a schematic partial enlarged view of a second touch channel of the touch panel according to an embodiment of the disclosure.
Fig. 7 is a schematic cross-sectional view of a touch panel according to an embodiment of the disclosure.
Fig. 8 is a schematic cross-sectional view of a touch panel according to another embodiment of the present application.
Fig. 9 is a schematic cross-sectional view of a touch display according to an embodiment of the disclosure.
Fig. 10 is a flowchart of a method for manufacturing a touch display according to an embodiment of the disclosure.
In the accompanying drawings:
1, a touch panel; 10, a touch area; 11, a first region; 12, a second region; 20, a non-touch area; 30, a first direction; 40, a second direction; 100, a substrate; 110, a first touch channel; 111, a first electrode unit; 112, a first electrical connection; 120, a second touch channel; 121, a second electrode unit; 122, a second electrical connection; 130, a first sub-substrate; 140, a second sub-substrate; 200, a driver; 2, a display module; 3, cover plate; 4, optical colloid.
Detailed Description
Features and exemplary embodiments of various aspects of the present application are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing an example of the present application.
Note that, in the description of the embodiments of the present application: relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions; moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus; without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element; the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless otherwise specifically defined and limited; can be directly connected or indirectly connected; embodiments and features of embodiments in this application may be combined with each other without conflict.
The embodiments will be described in detail below with reference to the accompanying drawings.
When the touch display screen adopts a capacitive touch mode, the touch control on the touch display screen is reflected by measuring the change of the capacitance. In general, for a touch display screen with the same parameters, the capacitance variation generated by touch is constant, and when the area of the touch display screen is large, the current variation caused by the capacitance variation at a position far away from the driver (usually using the IC chip Integrated Circuit Chip) is reduced due to high impedance caused by long-distance signal channel transmission, so that the variation of the current is too small, and the sensitivity of touch is reduced, even touch cannot be detected. Therefore, the touch display screen determined by the design parameters has a theoretical maximum size limit.
In addition, signal wires and ground wires are generally arranged outside the edges of the touch display screen and serve as channels for signal transmission between the touch area and the driver, and as the signal wires and the ground wires are parallel to each other, obvious differences exist between near-end signals and far-end signals after long-distance signal transmission, the sensitivity of touch can be influenced, and the size of the touch display screen is limited.
The embodiment of the application provides a touch panel, a touch display and a manufacturing method of the touch display, wherein the inherent capacitance of a touch electrode is reduced by reducing the width of an electric connection part along the direction away from a driver 200, so that the proportion of capacitance change caused by touch to total capacitance is increased, the magnitude of current change caused by capacitance change is increased, the touch sensitivity of a region of the touch display away from the driver 200 is improved, and the size limit of the touch display can be further increased. In addition, the distance between the ground line and the signal line is increased along the direction away from the driver 200, so as to reduce the difference between the near-end signal and the far-end signal of the opposite driver 200, and improve the touch sensitivity.
Fig. 1 is a schematic top view of a first touch channel 110 of a touch panel 1 according to a preferred embodiment of the present application, and as shown in fig. 1, the touch panel 1 of the embodiment of the present application includes: a substrate 100 including a touch area 10 and a non-touch area 20 disposed around the touch area 10; a plurality of first touch channels 110 arranged along the first direction 30 in the touch area 10, each first touch channel 110 including a plurality of first electrode units 111 arranged along the second direction 40, adjacent first electrode units 111 being electrically connected by a first electrical connection 112, the second direction 40 intersecting the first direction 30; the driver 200 is disposed in the non-touch area 20 and located at one side of the plurality of touch areas 10 along the first direction 30; in at least a portion of the touch area 10, the first electrical connection portions 112 of the plurality of first touch channels 110 decrease in width along the first direction 30 in a direction away from the driver 200 along the first direction 30. The driver 200 may be an IC chip, may be provided in plural on the same PCB control card, or may be provided in plural PCB control cards.
Fig. 2 is a partial enlarged view of the first touch channel 110 according to the embodiment of the present application, in which the widths of the first electrical connection portions 112 of the first touch channels 110 along the first direction 30 decrease, i.e. a, in a direction away from the driver 200 along the first direction 30 (the direction indicated by the arrow in fig. 2) 1 ＞a 2 According to the capacitance calculation formula c= (epsilon·s)/(4pi k·d), epsilon is the dielectric permittivity (relative permittivity) related to the material, k is the electrostatic force constant, k= 8.9880 ×10, unit: in this embodiment, in a direction away from the driver 200 along the first direction 30, the width of the first electrical connection portion 112 decreases, so that the facing area S of the capacitor plate decreases along a direction away from the driver 200, so that the inherent capacitance of the capacitor plate away from the driver 200 decreases, and the ratio of the capacitance change amount generated during touch to the total capacitance increases, and correspondingly, the ratio of the current change generated during touch to the total current increases, so that the change in current is easier to detect, and the touch sensitivity of the area away from the driver 200 increases, and the upper limit of the area of the capacitive touch panel 1 increases.
Fig. 3 is a schematic view illustrating a partition of some alternative embodiments of the present application, as shown in fig. 3, the touch area 10 includes a first area 11 and a second area 12 adjacent to each other along a first direction 30, where the first area 11 is located on a side of the second area 12 away from the driver 200; in the first area 11, in a direction away from the driver 200 along the first direction 30, the widths of the first electrical connection portions 112 of the plurality of first touch channels 110 decrease along the first direction 30; in the second region 12, the width of each first electrical connection 112 along the first direction 30 is equal. It is considered that although a change in the ratio of the capacitance change generated at the time of touch to the total capacitance affects the apparent degree of the current change, the effect is not apparent when the distance between the touch area and the driver 200 is reduced to some extent, because the change in the current can be clearly detected, and further, the apparent degree of the current change is increased without an obvious effect. Thus, in the embodiment of the present application, the width of the first electrical connection portion 112 in the direction away from the driver 200 is kept constant in the second region 12 close to the driver 200, and the width of the first electrical connection portion 112 in the direction away from the driver 200 is gradually reduced in the first region 11 far from the driver 200.
In some alternative embodiments of the present application, the non-touch area 20 includes: a plurality of signal lines through which the driver 200 and the first touch channel 110 are electrically connected; the ground wire is positioned at one side of the signal wire far away from the touch area 10; in the direction away from the driver 200 along the first direction 30, the distance between the portion of the signal line located at both sides of the touch area 10 along the second direction 40 and the ground increases. In the direction away from the driver 200 along the first direction 30, the distance between the signal line and the ground line is increased in the embodiment of the present application, so that the difference between the near-end signal and the far-end signal of the opposite driver 200 is reduced, thereby reducing the signal variation caused by long-distance transmission of the signal in the non-touch area 20, avoiding the occurrence of the condition that the current variation caused by touch cannot be detected due to the reduction of the current signal caused by long-distance signal transmission, and improving the touch sensitivity of the large-size capacitive touch panel 1 in the area away from the driver 200.
Fig. 4 is a schematic diagram of a signal line and a ground line according to an embodiment of the present application, as shown in fig. 3, in some alternative embodiments of the present application, in a non-touch area 20 located at two sides of a touch area 10 along a second direction 40, the signal line includes a plurality of first signal line segments and second signal line segments, the first signal line segments extend along a first direction 30, the second signal line segments extend along a second direction 40, and each signal line is formed by connecting the first signal line segments and the second signal line segments; the distance between the adjacent two signal lines is equal, the distance between the first signal line segment and the second signal line segment is equal, and the minimum distance between any signal line segment and the edge of the touch area 10 is equal, so that the plurality of signal lines form a stepped routing pattern in the non-touch area 20 located at two sides of the touch area 10 along the second direction 40; the ground line extends along the first direction 30, the distance between the signal line at the outermost side of the stepped trace pattern and the ground line, and the non-touch areas 20 at two sides of the touch area 10 along the second direction 40 are gradually increased in step.
In some alternative embodiments of the present application, in the non-touch area 20 located at two sides of the touch area 10 along the second direction 40, in the direction away from the driver 200 along the first direction 30, the width of the ground wire increases along the direction away from the driver 200, and the channel impedance in the transmission channel can be reduced by increasing the width of the ground wire, so that the difference between the near-end signal and the far-end signal of the opposite driver 200 can be reduced, the situation that the current signal is reduced due to long-distance signal transmission, and the current change caused by touch cannot be detected is avoided, and the touch sensitivity of the large-size capacitive touch panel 1 away from the area of the driver 200 is improved.
Fig. 5 is a schematic top view of a second touch channel 120 according to an embodiment of the present application, as shown in fig. 5, in some alternative embodiments of the present application, the touch panel 1 further includes: the plurality of second touch channels 120 are arranged in the touch area 10 and are insulated from the first touch channels 110, the orthographic projection of the second touch channels 120 on the substrate 100 is intersected with the orthographic projection of the first touch channels 110 on the substrate 100, the projections of the plurality of first touch channels 110 and the plurality of second touch channels 120 on the substrate 100 form a net structure, and the intersected parts form flashlight electrodes.
Fig. 6 is a partial enlarged view of the second touch channel 120 in the embodiment of the present application, as shown in fig. 6, the second touch channel 120 includes a plurality of second electrode units 121 arranged along the first direction 30, and adjacent second electrode units 121 are connected by a second electrical connection portion 122, and the width of the second electrical connection portion 122 decreases in the direction away from the driver 200 along the first direction 30 (the direction indicated by the arrow in fig. 6), and based on the same principle as the width change of the first electrical connection portion 112, the decreasing width of the second electrical connection portion 122 also increases the ratio of the capacitance change generated by touch to the total capacitance in the direction away from the driver 200 along the first direction 30, thereby increasing the touch sensitivity of the area away from the driver 200.
Fig. 7 is a schematic cross-sectional view of a touch panel 1 according to an embodiment of the present application, as shown in fig. 7, in some alternative embodiments of the present application, a substrate 100 includes: the first sub-substrate 130, the first touch channel 110 is located on one surface of the first sub-substrate 130 facing the cover plate 3; the second sub-substrate 140, the second touch channel 120 is located on one surface of the second sub-substrate 140 facing the cover plate 3; the second sub-substrate 140 is located on a surface of the first sub-substrate 130 facing away from the cover plate 3. In this embodiment, the first touch channel 110 is located on the first sub-substrate 130, the second touch channel 120 is located on the second sub-substrate 140, the first touch channel 110 is formed on the first sub-substrate 130, the second touch channel 120 is formed on the second sub-substrate 140, and the first sub-substrate 130 and the second sub-substrate 140 are bonded to form a capacitive film.
In some alternative embodiments of the present application, the cover plate 3 of the touch panel 1 is attached to the first sub-substrate 130, the first sub-substrate 130 is attached to the second sub-substrate 140, and the second sub-substrate 140 is attached to the display module 2 through the optical adhesive 4. Illustratively, the optical colloid 4 is an optically transparent adhesive (Optically Clear Adhesive, OCA) or an optically transparent resin (Optical Clear Resin, OCR).
Fig. 8 is a schematic cross-sectional view of a touch panel 1 according to another embodiment of the present application, as shown in fig. 8, in some alternative embodiments of the present application, a first touch channel 110 and a second touch channel 120 are respectively located on opposite sides of a substrate 100; the first touch channel 110 is located on a surface of the substrate 100 facing the cover 3. In this embodiment, the first touch channel 110 and the second touch channel 120 are respectively located on opposite sides of the substrate 100, and the first touch channel 110 and the second touch channel 120 are directly formed on the substrate 100 to form a capacitive film.
In some alternative embodiments of the present application, the first touch channel 110 and the second touch channel 120 are both located on a side of the substrate 100 facing the cover 3; the first touch channel 100 is insulated from the second touch channel 120. It should be noted that, the first touch channel 100 and the second touch channel 120 may be bonded by the optical colloid 4 to form a capacitive film, and then bonded to the substrate 100; alternatively, an insulating material may be disposed at the overlapping portion of the first touch channel 100 and the second touch channel 120 to form a bridge structure, that is, one of the first touch channel 100 and the second touch channel 120 is first attached to the substrate 100, then an insulating layer is disposed, and then the other one of the first touch channel and the second touch channel is formed.
In some alternative embodiments of the present application, the cover plate 3 of the touch panel 1 and the substrate 100 and the display module 2 are attached by the optical adhesive 4.
Fig. 9 is a schematic cross-sectional view of a touch display according to another preferred embodiment of the present application, and as shown in fig. 9, the touch display includes: the touch panel 1 described above; the display module 2 is a liquid crystal display module 2 (Liquid Crystal Module, LCM), and the touch panel 1 is located at the light emitting side of the display module 2; wherein, touch panel 1 is laminated with display module assembly 2 through optical colloid 4.
Fig. 10 is a flowchart illustrating a method for manufacturing a touch display according to another preferred embodiment of the present application, and as shown in fig. 10, the method for manufacturing a touch display includes: providing a substrate 100; forming a plurality of first touch channels 110 in the touch area 10 of the substrate 100, the plurality of first touch channels 110 being arranged along the first direction 30, each first touch channel 110 including a plurality of first electrode units 111 arranged along the second direction 40, adjacent first electrode units 111 being electrically connected by a first electrical connection 112, the second direction 40 intersecting the first direction 30; and binding the drivers 200 to the non-touch area 20 of the substrate 100, wherein the drivers 200 are located at one side of the touch areas 10 along the first direction 30, and the widths of the first electrical connection portions 112 of the first touch channels 110 along the first direction 30 decrease in at least a partial area of the touch areas 10 along the first direction 30 away from the drivers 200. In this embodiment, when the first touch channels 110 are formed on the substrate 100, at least a part of the area in the touch area 10 is ensured, and the widths of the first electrical connection portions 112 of the plurality of first touch channels 110 along the first direction 30 decrease along the first direction 30 in the direction away from the driver 200, so that the manufactured touch display can also have better touch sensitivity in the area far from the driver 200.
In some optional embodiments of the present application, the method for manufacturing a touch display further includes: a plurality of second touch channels 120 are formed in the touch area 10 of the substrate 100, the second touch channels 120 are insulated from the first touch channels 110, and the orthographic projection of the second touch channels 120 on the substrate 100 intersects with the orthographic projection of the first touch channels 110 on the substrate 100. The two touch channels include a plurality of second electrode units 121 arranged along the first direction 30, and adjacent second electrode units 121 are connected by a second electrical connection portion 122, and the same second touch channel 120 has a decreasing width of the second electrical connection portion 122 in a direction away from the driver 200 along the first direction 30, and based on the same principle as the width change of the first electrical connection portion 112, the decreasing width of the second electrical connection portion 122 in a direction away from the driver 200 along the first direction 30 can also increase the ratio of the capacitance change generated by touch to the total capacitance, thereby increasing the touch sensitivity of the region away from the driver 200.
In some optional embodiments of the present application, forming the first touch channel 110 and the second touch channel 120 includes: etching the first touch channel 110 to enable the first touch channel 110 to be arranged along the first direction 30, and forming a first area 11 and a second area 12, wherein the first area 11 is located at one side of the second area 12 away from the driver 200; the second touch channels 120 are etched such that the second touch channels 120 are aligned along the second direction 40, and the first direction 30 and the second direction 40 intersect.
In some alternative embodiments of the present application, forming the signal line and the ground line includes: etching the area located at two sides of the first touch channel 110 along the second direction 40, so that the signal line includes a plurality of first signal line segments and second signal line segments, the first signal line segments extend along the first direction 30, and the second signal line segments extend along the second direction 40; wherein, between two adjacent signal lines, the interval of the first signal line segments is equal, and the interval of the second signal line segments is equal; between any one of the signal lines and the edge of the first touch channel 110, making the minimum distance between the first signal line segment and the edge of the first touch channel 110 equal; the ground wire is extended in the first direction 30. In the embodiment of the present application, the plurality of signal lines form a stepped routing pattern in the non-touch area 20 located at two sides of the touch area 10 along the second direction 40; the ground wire extends along the first direction 30, the distance between the signal wire at the outermost side of the stepped routing pattern and the ground wire, and the non-touch area 20 at two sides of the touch area 10 along the second direction 40 increases gradually, so that the difference between the near-end signal and the far-end signal of the opposite driver 200 becomes smaller, the signal change caused by long-distance transmission of the signal in the non-touch area 20 is reduced, the condition that the current change caused by touch cannot be detected due to the reduction of the current signal caused by long-distance signal transmission is avoided, and the touch sensitivity of the large-size capacitive touch panel 1 far away from the area of the driver 200 is improved.
In some alternative embodiments of the present application, forming the signal line and the ground line includes: etching is performed in the area located at both sides of the first touch channel 110 along the second direction 40, and the width of the ground line increases along the direction away from the driver 200 along the first direction 30 along the direction away from the driver 200. In the embodiment of the application, the width of the ground line is increased in the direction away from the driver 200 along the first direction 30, so that the difference between the near-end signal and the far-end signal of the opposite driver 200 is reduced, and the touch sensitivity of the large-size capacitive touch panel 1 in the area away from the driver 200 is improved.
In some alternative embodiments of the present application, the step of providing the substrate 100 includes: providing a first sub-substrate 130 and a second sub-substrate 140; forming the plurality of first touch channels 110 in the touch area 10 of the substrate 100 includes: forming a plurality of first touch channels 110 on a first sub-substrate 130; forming the plurality of second touch channels 120 in the touch area 10 of the substrate 100 includes: forming a plurality of second touch channels 120 on the second sub-substrate 140; the manufacturing method further comprises the following steps: the first sub-substrate 130 formed with the plurality of first touch channels 110 is bonded to the second sub-substrate 140 formed with the plurality of second touch channels 120. Binding a flexible circuit (Flexible Printed Circuit, FPC) to the first touch channel 110 and the second touch channel 120 through anisotropic conductive films (Anisotropic Conductive Film, ACF) respectively, and attaching the first touch channel 110 and the second touch channel 120 to form a capacitor film; the first touch channel 110 and the second touch channel 120 are attached to form a capacitive film, and the flexible circuit FPC is respectively bound to the first touch channel 110 and the second touch channel 120 through the anisotropic conductive film ACF. The outlet position and the outer shape of the flexible circuit FPC are determined according to the connection scheme and the arrangement of the driver 200.
In some optional embodiments of the present application, the bonding the first touch channel 110 and the second touch channel 120 to form the capacitive film includes: bonding was performed using optical colloid 4.
In some alternative embodiments of the present application, the step of providing the substrate 100 includes: providing a first sub-substrate 130 and a second sub-substrate 140; forming the plurality of first touch channels 110 in the touch area 10 of the substrate 100 includes: forming a plurality of first touch channels 110 on a first sub-substrate 130; forming the plurality of second touch channels 120 in the touch area 10 of the substrate 100 includes: forming a plurality of second touch channels 120 on the second sub-substrate 140; the manufacturing method further comprises the following steps: the first sub-substrate 130 formed with the plurality of first touch channels 110 is bonded to the second sub-substrate 140 formed with the plurality of second touch channels 120.
In some alternative embodiments of the present application, the first touch channel 110 and the second touch channel 120 are formed on opposite sides of the substrate 100, respectively.
In some alternative embodiments of the present application, the first touch channel 110 and the second touch channel 120 are formed on the side of the substrate 100 facing the cover plate 3; the first touch channel 110 is insulated from the second touch channel 120.
It should be noted that the material and thickness of the substrate 100 may be determined according to the connection scheme and arrangement of the driver 200, and the commonly used substrate 100 may be a glass substrate 100 or a PET (Polyethylene terephthalate ) substrate 100, for example.
In some optional embodiments of the present application, the method for manufacturing a touch display further includes: the substrate 100 (capacitive film) with the first touch channel 110 and the second touch channel 120 is attached to the cover 3 and then attached to the display module 2. In the bonding of the capacitor film and the cover plate 3, the optical colloid 4 is used for bonding, and the cover plate 3 may be glass or PC
(Polycarbonate ), PMMA (polymethyl methacrylate, polymethyl methacrylate); when the substrate 100 is attached to the display module 2, the attaching mode includes frame attachment and full attachment.
In summary, the embodiments of the present application provide a touch panel, a touch display, and a method for manufacturing a touch display, where the touch panel 1, the touch display, and the method for manufacturing a touch display reduce the inherent capacitance of the touch electrode by reducing the width of the electrical connection portion along the direction away from the driver 200, so that the ratio of the relative total capacitance of the capacitance change caused by touch is increased during touch, and the sensitivity of the touch panel 1 away from the driver 200 is improved.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (14)
1. A touch panel, comprising:
the substrate comprises a touch area and a non-touch area arranged around the touch area;
the touch control device comprises a touch control area, a plurality of first touch control channels and a plurality of second touch control channels, wherein the touch control area is arranged along a first direction, each first touch control channel comprises a plurality of first electrode units arranged along a second direction, adjacent first electrode units are electrically connected through a first electric connection part, and the second direction is intersected with the first direction;
the driver is arranged in the non-touch area and is positioned at one side of the touch areas along the first direction;
the plurality of second touch channels are arranged in the touch area, each second touch channel comprises a plurality of second electrode units arranged along the first direction, and adjacent second electrode units are connected through a second electric connection part; in the same second touch channel, the width of the second electrical connection portion decreases in a direction away from the driver along the first direction;
the touch control area comprises a first area, and the widths of the first electric connection parts of the plurality of first touch control channels along the first direction are gradually decreased in the first area along the direction away from the driver along the first direction.
2. The touch panel of claim 1, wherein the touch area further comprises a second area, the first area and the second area being adjacent to each other in a first direction, the first area being located on a side of the second area remote from the driver;
in the first region, in a direction away from the driver along the first direction, the widths of the first electrical connection portions of the plurality of first touch channels along the first direction decrease;
in the second region, the width of each first electrical connection portion along the first direction is equal.
3. The touch panel of claim 1, wherein the non-touch area comprises:
the driver is electrically connected with the first touch channel through the signal wires;
the ground wire is positioned at one side of the signal wire far away from the touch area;
and in the direction away from the driver along the first direction, the distance between the part of the signal line positioned at the two sides of the touch area along the second direction and the ground line increases progressively.
4. The touch panel according to claim 1, wherein,
the second touch channel is arranged in an insulating way with the first touch channel, and the orthographic projection of the second touch channel on the substrate is intersected with the orthographic projection of the first touch channel on the substrate.
5. The touch panel of claim 4, further comprising:
and the first touch control channel and the second touch control channel are positioned on the cover plate.
6. The touch panel of claim 5, wherein the substrate comprises:
the first touch control channel is positioned on one surface of the first sub-substrate, which faces the cover plate;
the second touch control channel is positioned on one surface of the second sub-substrate, which faces the cover plate;
the second sub-substrate is located on one surface of the first sub-substrate, which is away from the cover plate.
7. The touch panel of claim 6, wherein the cover plate of the touch panel is bonded to the first sub-substrate and the first sub-substrate is bonded to the second sub-substrate through an optical adhesive.
8. The touch panel of claim 5, wherein the first touch channel and the second touch channel are respectively located on opposite sides of the substrate;
the first touch channel is located on one surface of the substrate, which faces the cover plate.
9. The touch panel of claim 5, wherein the first touch channel and the second touch channel are both located on a side of the substrate facing the cover plate;
and the first touch channel and the second touch channel are in insulating fit.
10. The touch panel according to claim 8 or 9, wherein the cover plate and the substrate of the touch panel are bonded by optical colloid.
11. A touch display, comprising:
the touch panel of any one of claims 1-10;
the display module is a liquid crystal display module, and the touch panel is positioned on the light emitting side of the display module;
the touch panel and the display module are attached through optical colloid.
12. A method for manufacturing a touch display, comprising:
providing a substrate;
forming a plurality of first touch channels in a touch area of the substrate, wherein the plurality of first touch channels are arranged along a first direction, each first touch channel comprises a plurality of first electrode units arranged along a second direction, adjacent first electrode units are electrically connected through a first electric connection part, and the second direction is intersected with the first direction; and
the non-touch area of the substrate is bound and connected with a driver, the driver is positioned at one side of a plurality of touch areas along a first direction,
forming a plurality of second touch channels in the touch area of the substrate, wherein each second touch channel comprises a plurality of second electrode units arranged along the first direction, and adjacent second electrode units are connected through a second electric connection part; in the same second touch channel, the width of the second electrical connection portion decreases in a direction away from the driver along the first direction;
the touch control area comprises a first area, and the widths of the first electric connection parts of the plurality of first touch control channels along the first direction are gradually decreased in the first area along the direction away from the driver along the first direction.
13. The method of claim 12, wherein forming a plurality of second touch channels in the touch area of the substrate comprises:
the second touch channel is arranged in an insulating way with the first touch channel, and the orthographic projection of the second touch channel on the substrate is intersected with the orthographic projection of the first touch channel on the substrate.
14. The method for manufacturing a touch display according to claim 13, further comprising:
and the substrate provided with the first touch control channel and the second touch control channel is firstly attached to the cover plate and then attached to the display module.
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