CN112612375A - 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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- CN112612375A CN112612375A CN202011611011.5A CN202011611011A CN112612375A CN 112612375 A CN112612375 A CN 112612375A CN 202011611011 A CN202011611011 A CN 202011611011A CN 112612375 A CN112612375 A CN 112612375A
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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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Abstract
The application discloses a touch panel, a touch display and a manufacturing method of the touch display. The touch panel includes: the touch screen comprises a substrate, a touch screen and a touch screen, wherein 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 control units, wherein the first touch control channels are arranged in a touch control area 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 crossed with the first direction; the driver is arranged in the non-touch area and is positioned on one side of the touch areas along the first direction; in at least partial area of the touch area, in the direction far away from the driver along the first direction, the widths of the first electric connection parts of the first touch channels along the first direction are decreased progressively. 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, the proportion of the variable capacitance caused by touch is increased, and the sensitivity of the touch panel away from the driver is improved.
Description
Technical Field
The present application belongs to the field of touch technology, and in particular, relates to a touch panel, a touch display, and a method for manufacturing the touch display.
Background
With the demand of market application, the trend of large-size touch display screens is more and more obvious at present. With the increasing size of the touch display screen, the distance between the touch channel and the driver is increased, so that the influence of the impedance of the touch channel on the conduction of the electric signal is more and more obvious, and under the same touch condition, the farther away from the driver, the less obvious the change of the electric signal is, so that the sensitivity of the touch display screen is lowered, 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 a touch display screen, which is far away from a driver.
In a first aspect, a touch panel is provided, including: the touch screen comprises a substrate, a touch screen and a touch screen, wherein 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 control units, wherein the first touch control channels are arranged in a touch control area 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 crossed with the first direction; the driver is arranged in the non-touch area and is positioned on one side of the touch areas along the first direction; in at least partial area of the touch area, in the direction far away from the driver along the first direction, the widths of the first electric connection parts of the first touch channels along the first direction are decreased progressively.
In one 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 on a side of the second area away from the driver; in the first area, in the direction far away from the driver along the first direction, the width of the first electric connection parts of the first touch channels along the first direction is decreased progressively; in the second region, the widths of the first electrical connection portions in the first direction are equal.
In one possible implementation, the non-touch area includes: the driver is electrically connected with the first touch channel through the signal lines; the ground wire is positioned on one side of the signal wire, which is far away from the touch area; and in the direction far away from the driver along the first direction, the distances between the parts of the signal lines positioned at the two sides of the touch area along the second direction and the ground line are increased progressively.
In a possible implementation manner, the touch panel further includes: and the plurality of second touch channels are arranged in the touch area and are insulated from the first touch channels, and the orthographic projections of the second touch channels on the substrate are crossed with the 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 one possible implementation, the substrate includes: the first touch channel is positioned on one surface of the first sub-substrate facing the cover plate; the second touch channel is positioned on one surface, facing the cover plate, of the second sub-substrate; the second sub-substrate is positioned on one surface of the first sub-substrate, which is deviated from the cover plate.
In one possible implementation manner, the cover plate of the touch panel and the first sub-substrate and the second sub-substrate are bonded together by the optical adhesive.
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 on one side of the substrate facing the cover plate; the first touch channel and the second touch channel are in insulation fit.
In one possible implementation, the cover plate and the substrate of the touch panel are bonded together by an optical adhesive.
In a second aspect, a touch display is provided, including: the touch panel described above; the display module is a liquid crystal display module, and the touch panel is positioned on the light emergent side of the display module; the touch panel and the display module are attached through the 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 first electric connection parts, and the second direction is crossed with the first direction; and binding and connecting a driver in the non-touch area of the substrate, wherein the driver is positioned on one side of the touch areas along the first direction, and in at least partial area of the touch areas, the width of the first electric connection parts of the first touch channels along the first direction is decreased progressively along the direction far away from the driver along the first direction.
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 insulated from the first touch channels, and the orthographic projections of the second touch channels on the substrate are crossed with the orthographic projections of the first touch channels on the substrate.
In a possible implementation manner, the method for manufacturing a touch display further includes: and the substrate with the first touch channel and the second touch 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 variable capacitance caused by touch to the total capacitance is increased during touch, 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 needed to be used 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 it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic top view illustrating a first touch channel of a touch panel according to an embodiment of the present disclosure.
Fig. 2 is a partially enlarged schematic view of a first touch channel of a touch panel according to an embodiment of the present disclosure.
Fig. 3 is a schematic view of a partition of a touch panel according to an embodiment of the present application.
Fig. 4 is a schematic layout diagram of signal lines and ground lines of a touch panel according to an embodiment of the present disclosure.
Fig. 5 is a schematic top view illustrating a second touch channel of a touch panel according to an embodiment of the present disclosure.
Fig. 6 is a schematic partial enlarged view of a second touch channel of a touch panel according to an embodiment of the present disclosure.
Fig. 7 is a schematic cross-sectional view of a touch panel according to an embodiment of the present application.
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 present application.
Fig. 10 is a flowchart illustrating a method for manufacturing a touch display according to an embodiment of the present disclosure.
In the drawings:
1, a touch panel; 10, a touch area; 11, a first region; 12, a second area; 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 submount; 140, a second submount; 200, a driver; 2, a display module; 3, a cover plate; 4, optical colloid.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be 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 illustrating examples thereof.
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; also, 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 identical elements in a process, method, article, or apparatus that comprises the element; unless expressly stated or limited otherwise, the terms "mounted" and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected; the embodiments and features of the embodiments in the present 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 of the touch display screen is reflected by measuring the change of the capacitance. Generally, 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 a driver (usually, an Integrated Circuit Chip) is reduced due to high impedance caused by long-distance signal channel transmission, so that the current variation is too small, and the touch sensitivity is reduced, or even the touch cannot be detected. Therefore, the touch display screen determined according to the design parameters has a theoretical maximum size limit.
In addition, outside the edge of the touch display screen, a signal line and a ground line are usually arranged as channels for signal transmission between the touch area and the driver, and since the signal line and the ground line are parallel to each other, after the signal transmission is performed at a long distance, a near-end signal and a far-end signal have an obvious difference, which also affects the touch sensitivity and limits the size of the touch display screen.
The embodiment of the application provides a touch panel, a touch display and a manufacturing method of the touch display, 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 the total capacitance is increased, the current change caused by the capacitance change is increased, the touch sensitivity of an area of the touch display screen away from the driver 200 is improved, and the size limit of the touch display screen can be further increased. In addition, the embodiment of the application also reduces the difference between the near-end signal and the far-end signal of the driver 200 by increasing the distance between the ground line and the signal line along the direction departing from the driver 200, thereby improving 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 according to 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 in the first direction 30 in the touch area 10, each of the first touch channels 110 including a plurality of first electrode units 111 arranged in the second direction 40, adjacent first electrode units 111 being electrically connected by first electrical connection portions 112, the second direction 40 intersecting the first direction 30; a driver 200 disposed in the non-touch area 20 and located at one side of the touch areas 10 along the first direction 30; in at least a partial region of the touch area 10, in a direction away from the driver 200 along the first direction 30, the widths of the first electrical connection portions 112 of the first touch channels 110 along the first direction 30 decrease progressively. It should be noted that the driver 200 may adopt an IC chip, and multiple PCB control cards may be disposed on the same PCB control card, or multiple PCB control cards may be disposed on the same PCB control card.
Fig. 2 is a partial enlarged view of the first touch channels 110 according to an embodiment of the present disclosure, in which in a direction (a direction indicated by an arrow in fig. 2) away from the driver 200 along the first direction 30, the widths of the first electrical connection portions 112 of the first touch channels 110 along the first direction 30 are decreased, that is, a1＞a2In accordance with the capacitance calculation formula C ═ S · S)/(4 π k · d), ε is the dielectric permittivity (relative permittivity) material dependent, k is the electrostatic force constant, k ═ 8.9880 × 10, units: Nm/C, d is the distance of the capacitor plate, S is the facing area of the capacitor plate, this applicationIn the embodiment, in the direction away from the driver 200 along the first direction 30, the width of the first electrical connection portion 112 decreases progressively, so that the facing area S of the capacitor plate decreases in the direction away from the driver 200, so that the inherent capacitance of the capacitor plate away from the driver 200 decreases, thereby increasing the ratio of the capacitance variation generated during the touch to the total capacitance, and accordingly, the ratio of the current variation generated during the touch to the total current increases, so that the change of the current is more easily detected, thereby increasing the touch sensitivity of the area away from the driver 200, and further increasing the upper limit of the area of the capacitive touch panel 1.
Fig. 3 is a schematic sectional view of some optional embodiments of the present application, as shown in fig. 3, a touch area 10 includes a first area 11 and a second area 12 adjacent to each other along a first direction 30, the first area 11 is located on a side of the second area 12 away from a driver 200; in the first region 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 along the first direction 30 decrease progressively; in the second region 12, the first electrical connection portions 112 are equal in width along the first direction 30. It is considered that although the change in the ratio of the capacitance change to the total capacitance generated upon touch affects the apparent degree of the current change, the effect is not significant when the distance between the touch area and the driver 200 is reduced to a certain degree, because the change in the current can be clearly detected, and the apparent degree of the current change is not further increased, and there is no significant effect. Therefore, in the embodiment of the present application, in the second region 12 close to the driver 200, the width of the first electrical connection portion 112 in the direction away from the driver 200 is kept constant, and in the first region 11 away from the driver 200, the width of the first electrical connection portion 112 in the direction away from the driver 200 is gradually reduced.
In some optional embodiments of the present application, the non-touch area 20 includes: the driver 200 and the first touch channel 110 are electrically connected through signal lines; the ground wire is positioned on one side of the signal wire, which is far away from the touch area 10; in the direction away from the driver 200 along the first direction 30, the distances between the ground lines and the portions of the signal lines located on both sides of the touch area 10 along the second direction 40 are increased. In the direction away from the driver 200 along the first direction 30, the embodiment of the present application increases the distance between the signal line and the ground line, so that the difference between the near-end signal and the far-end signal of the driver 200 is reduced, thereby reducing the signal change caused by long-distance transmission of the signal in the non-touch area 20, avoiding the occurrence of the situation that the current signal is reduced due to long-distance signal transmission, so that the current change caused by touch cannot be detected, and improving the touch sensitivity of the large-sized capacitive touch panel 1 in the area away from the driver 200.
Fig. 4 is a schematic diagram of routing of signal lines and ground lines according to an embodiment of the present disclosure, as shown in fig. 3, in some optional embodiments of the present disclosure, in the non-touch area 20 located on both sides of the touch area 10 along the second direction 40, the signal lines include a plurality of first signal line segments and second signal line segments, the first signal line segments extend along the first direction 30, the second signal line segments extend along the second direction 40, and each signal line is formed by connecting first signal line segments and second signal line segments; between two adjacent signal lines, the distance between the first signal line segment is equal, the distance between the second signal line segment is equal, and the minimum distance between any signal line and the edge of the touch area 10 is equal, so that a step-shaped routing pattern is formed in the non-touch area 20 at two sides of the touch area 10 along the second direction 40 by the plurality of signal lines; the ground line extends along the first direction 30, and the distance between the signal line at the outermost side of the step-shaped trace pattern and the ground line is gradually increased in steps in the non-touch areas 20 at two sides of the touch area 10 along the second direction 40.
In some optional embodiments of the present application, in the non-touch areas 20 located on both 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 line increases along the direction away from the driver 200, and by increasing the width of the ground line, the channel impedance in the transmission channel can be reduced, so that the difference between the near-end signal and the far-end signal relative to the driver 200 can also be reduced, the occurrence of a 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 in the area away from the driver 200 is improved.
Fig. 5 is a schematic top view of the second touch channel 120 according to an embodiment of the present disclosure, and as shown in fig. 5, in some optional embodiments of the present disclosure, 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, orthographic projections of the second touch channels 120 on the substrate 100 are intersected with orthographic projections of the first touch channels 110 on the substrate 100, projections of the plurality of first touch channels 110 and the plurality of second touch channels 120 on the substrate 100 form a mesh 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, adjacent second electrode units 121 are connected by the second electrical connection portion 122, and in the same second touch channel 120, in a direction (a direction indicated by an arrow in fig. 6) away from the driver 200 along the first direction 30, a width of the second electrical connection portion 122 decreases progressively, and based on the same principle as a width change of the first electrical connection portion 112, in a direction away from the driver 200 along the first direction 30, the decreasing width of the second electrical connection portion 122 can also increase a ratio of a capacitance change generated by a touch to a total capacitance, thereby increasing a touch sensitivity of an 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 disclosure, as shown in fig. 7, in some optional embodiments of the present disclosure, 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 side of the first sub-substrate 130 facing away from the cover plate 3. In the embodiment of the present invention, 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 the capacitive film.
In some optional embodiments of the present disclosure, 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 Clear Adhesive (OCA) or an Optically Clear Resin (OCR).
Fig. 8 is a schematic cross-sectional view of a touch panel 1 according to another embodiment of the present disclosure, as shown in fig. 8, in some alternative embodiments of the present disclosure, a first touch channel 110 and a second touch channel 120 are respectively located on two opposite sides of a substrate 100; the first touch channel 110 is located on a surface of the substrate 100 facing the cover plate 3. In the embodiment of the present disclosure, the first touch channel 110 and the second touch channel 120 are respectively located on two 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 capacitor film.
In some optional 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 plate 3; the first touch channel 100 and the second touch channel 120 are insulated from each other. It should be noted that the first touch channel 100 and the second touch channel 120 may be bonded by the optical adhesive 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, and then an insulating layer is disposed thereon, and then the other of the first touch channel 100 and the second touch channel is formed thereon.
In some optional embodiments of the present disclosure, the cover plate 3 of the touch panel 1 and the substrate 100 and the display module 2 are attached to each other through 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 (LCM), and the touch panel 1 is located on the light emitting side of the display Module 2; the touch panel 1 and the display module 2 are attached to each other through the optical adhesive 4.
Fig. 10 is a flowchart illustrating a method for manufacturing a touch display according to another preferred embodiment of the present invention, 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 first electrical connections 112, the second direction 40 intersecting the first direction 30; and binding and connecting the driver 200 to the non-touch area 20 of the substrate 100, wherein the driver 200 is located on one side of the touch areas 10 along the first direction 30, and at least a partial area of the touch areas 10 has a decreasing width of the first electrical connection portions 112 of the first touch channels 110 along the first direction 30 in a direction away from the driver 200 along the first direction 30. In the embodiment of the present invention, when the first touch channels 110 are formed on the substrate 100, it is ensured that in at least a partial region of the touch area 10, 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 along the first direction 30 are decreased gradually, so that the manufactured touch display can have a better touch sensitivity in a region away 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 an orthogonal projection of the second touch channels 120 on the substrate 100 intersects an orthogonal projection of the first touch channels 110 on the substrate 100. The two-touch channel comprises a plurality of second electrode units 121 arranged along the first direction 30, adjacent second electrode units 121 are connected through second electric connection parts 122, and the width of the second electric connection parts 122 decreases progressively in the direction away from the driver 200 along the first direction 30 in the same second touch channel 120, and on the basis of the same principle as the change of the width of the first electric connection parts 112, the decrease of the width of the second electric connection parts 122 can also improve the proportion of the capacitance change generated by touch to the total capacitance in the direction away from the driver 200 along the first direction 30, so that the touch sensitivity of the area away from the driver 200 is improved.
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, so that the first touch channel 110 is arranged along the first direction 30, and a first area 11 and a second area 12 are formed, so that the first area 11 is located on one side of the second area 12 away from the driver 200; etching the second touch channels 120, so that the second touch channels 120 are arranged 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 areas on two sides of the first touch channel 110 along the second direction 40 to make the signal line include a plurality of first signal line segments and second signal line segments, so that 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 pitches of the first signal line segments are equal, and the pitches of the second signal line segments are 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 line is extended in the first direction 30. In the embodiment of the application, a plurality of signal lines form a stepped trace 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 area 20 located at two sides of the touch area 10 along the second direction 40, step-by-step increase is performed to reduce the difference between the near-end signal and the far-end signal of the driver 200, so that the signal change caused by long-distance transmission of the signal in the non-touch area 20 is 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 in the area away from 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 on the regions on the two sides of the first touch channel 110 along the second direction 40, and the width of the ground line is increased along the direction away from the driver 200 along the first direction 30 and away from the driver 200. In the embodiment of the present 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 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 submount 130 and a second submount 140; forming a 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 the first sub-substrate 130; forming a 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 with the plurality of first touch channels 110 formed thereon is attached to the second sub-substrate 140 with the plurality of second touch channels 120 formed thereon. Firstly, a Flexible Printed Circuit (FPC) is bound to the first touch channel 110 and the second touch channel 120 through Anisotropic Conductive Films (ACFs), and then the first touch channel 110 and the second touch channel 120 are bonded to form a capacitive Film; the first touch channel 110 and the second touch channel 120 are first bonded to form a capacitor film, and then the flexible circuit FPC is respectively bonded to the first touch channel 110 and the second touch channel 120 through the anisotropic conductive film ACF. It should be noted that the position and shape of the outlet of the flexible circuit FPC are determined according to the connection scheme and arrangement of the driver 200.
In some optional embodiments of the present application, the attaching the first touch channel 110 and the second touch channel 120 to form a capacitive film includes: the optical adhesive 4 was used for bonding.
In some alternative embodiments of the present application, the step of providing the substrate 100 includes: providing a first submount 130 and a second submount 140; forming a 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 the first sub-substrate 130; forming a 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 with the plurality of first touch channels 110 formed thereon is attached to the second sub-substrate 140 with the plurality of second touch channels 120 formed thereon.
In some optional embodiments of the present disclosure, the first touch channel 110 and the second touch channel 120 are respectively formed on two opposite sides of the substrate 100.
In some optional embodiments of the present application, the first touch channel 110 and the second touch channel 120 are both formed on a side of the substrate 100 facing the cover plate 3; the first touch channel 110 and the second touch channel 120 are insulated from each other.
It should be noted that the material and thickness of the substrate 100 may be determined according to the connection scheme and the arrangement manner of the driver 200, and the substrate 100 may be, for example, a glass substrate 100 or a PET (Polyethylene terephthalate) substrate 100.
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 formed thereon is first bonded to the cover plate 3, and then bonded to the display module 2. In the bonding of the capacitor film to the cover plate 3, the optical adhesive 4 is used for bonding, and the cover plate 3 may be made of glass or PC
(Polycarbonate), PMMA (polymethyl methacrylate); when the substrate 100 is attached to the display module 2, the attachment method includes frame attachment and full attachment.
In summary, the embodiment of the present application provides a touch panel, a touch display and a method for manufacturing the touch display, in which the width of the electrical connection portion is reduced along the direction away from the driver 200 to reduce the inherent capacitance of the touch electrode, so that the ratio of the change capacitance caused by touch to the total capacitance is increased during touch, thereby improving the sensitivity of the touch panel 1 away from the driver 200.
While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical 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 touch screen comprises a substrate, a touch screen and a touch screen, wherein 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 control units, wherein the plurality of 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, the adjacent first electrode units are electrically connected through first electric connection parts, and the second direction is crossed with the first direction;
the driver is arranged in the non-touch area and is positioned on one side of the touch areas along a first direction;
in at least partial area of the touch area, in the direction away from the driver along the first direction, the width of the first electrical connection parts of the first touch channels along the first direction is decreased progressively.
2. The touch panel according to claim 1, wherein the touch area includes a first area and a second area adjacent to each other in a first direction, the first area being located on a side of the second area away from the driver;
in the first area, in a direction away from the driver along the first direction, the width of the first electric connection parts of the first touch channels along the first direction is decreased progressively;
in the second region, the widths of the first electrical connection portions in the first direction are 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 signal lines;
the ground wire is positioned on one side of the signal wire, which is far away from the touch area;
wherein, in a direction away from the driver along the first direction, distances from the ground line to portions of the signal line located on both sides of the touch area along the second direction are increased.
4. The touch panel according to claim 1, further comprising:
and the plurality of second touch channels are arranged in the touch area and are insulated from the first touch channels, and the orthographic projections of the second touch channels on the substrate are crossed with the orthographic projections of the first touch channels on the substrate.
5. The touch panel according to claim 4, further comprising:
the cover plate, the first touch control channel and the second touch control channel are located on the cover plate.
6. The touch panel of claim 5, wherein the substrate comprises:
the first touch channel is positioned on one surface, facing the cover plate, of the first sub-substrate;
the second touch channel is positioned on one surface, facing the cover plate, of the second sub-substrate;
the second sub-substrate is positioned on one surface of the first sub-substrate, which faces away from the cover plate.
7. The touch panel of claim 6, wherein the cover plate and the first sub-substrate of the touch panel and the first sub-substrate and the second sub-substrate of the touch panel are bonded together by an optical adhesive.
8. The touch panel of claim 5, wherein 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, facing the cover plate, of the substrate.
9. The touch panel of claim 5, wherein the first touch channel and the second touch channel are located on a side of the substrate facing the cover plate;
and the first touch channel and the second touch channel are in insulation fit.
10. The touch panel according to claim 8 or 9, wherein the cover plate and the substrate of the touch panel are bonded together by an optical adhesive.
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 emergent side of the display module;
the touch panel is attached to the display module through the optical colloid.
12. A method for manufacturing a touch display comprises the following steps:
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 crossed with the first direction; and
binding and connecting a driver in a non-touch area of the substrate, wherein the driver is positioned on one side of the touch areas along a first direction,
in at least partial area of the touch area, in the direction away from the driver along the first direction, the width of the first electrical connection parts of the first touch channels along the first direction is decreased progressively.
13. The method for manufacturing a touch display according to claim 12, further comprising:
and forming a plurality of second touch channels in the touch area of the substrate, wherein the second touch channels are insulated from the first touch channels, and the orthographic projections of the second touch channels on the substrate are crossed with the orthographic projections of the first touch channels on the substrate.
14. The method for manufacturing a touch display according to claim 13, further comprising:
and firstly, attaching the substrate with the first touch channel and the second touch channel to the cover plate, and then attaching the substrate to the display module.
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| CN112612375B (en) | 2023-08-08 |
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