CN108874227B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN108874227B CN108874227B CN201810713448.6A CN201810713448A CN108874227B CN 108874227 B CN108874227 B CN 108874227B CN 201810713448 A CN201810713448 A CN 201810713448A CN 108874227 B CN108874227 B CN 108874227B
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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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
Abstract
The invention discloses a display panel and a display device, wherein the display panel comprises a plurality of touch electrodes, a plurality of touch wires and a driving chip, wherein the touch electrodes, the touch wires and the driving chip are positioned on a first substrate; at least part of the touch wires comprise bent parts, and the vertical projection of the bent parts of the touch wires on the first substrate is positioned in the vertical projection of the touch electrodes electrically connected with the touch wires on the first substrate; the plurality of touch control electrodes comprise a first touch control electrode and a second touch control electrode, and the distance from the first touch control electrode to the driving chip is smaller than the distance from the second touch control electrode to the driving chip; the plurality of touch-control wires comprise first touch-control wires electrically connected with the first touch-control electrodes and second touch-control wires electrically connected with the second touch-control electrodes, and the total length of the bent parts of the first touch-control wires is greater than that of the bent parts of the second touch-control wires. According to the technical scheme, the touch control uniformity, the display uniformity and the touch control accuracy of the display panel are improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel and a display device.
Background
The display panel integrated with a touch function generally includes a plurality of touch electrodes and a plurality of touch traces, a driving chip in the display panel is electrically connected to the corresponding touch electrodes through the touch traces, the driving chip sends a touch signal to the corresponding touch electrodes through the touch traces, the touch electrodes sense a capacitance change value generated by the touch main body touching the display panel and generate a corresponding touch sensing signal to be fed back to the driving chip, and the driving chip determines the position of the touch main body touching the display panel according to the received touch sensing signal.
The total lengths of the touch-control wires electrically connected to the driving chip by the touch-control electrodes having different distances from the driving chip are different, so that the load difference of the touch-control wires electrically connected to the touch-control electrodes having different distances from the driving chip is larger, and the touch-control uniformity of the display panel is poor. In addition, due to the coupling effect between the touch traces and the data signal lines connected to the pixel units in the display panel, the different lengths of the touch traces electrically connected to the driving chip by the touch electrodes having different distances from the driving chip may result in a larger load difference between the data signal lines electrically connected to the pixel units having different distances from the driving chip, thereby resulting in a poorer display uniformity of the display panel.
Disclosure of Invention
In view of this, the present invention provides a display panel and a display device, which reduce the difference between the total length of a first touch trace and the total length of a second touch trace, and further reduce the difference between the load on the first touch trace and the load on the second touch trace, and the difference between the loads on signal lines connected to pixel units in the display panel with different distances from a driving chip, so as to improve the touch uniformity and display uniformity of the display panel, and effectively reduce the signal crosstalk between the touch trace electrically connected to a touch electrode and other touch electrodes, and further reduce the signal crosstalk between different touch electrodes, and improve the touch accuracy of the display panel.
In a first aspect, an embodiment of the present invention provides a display panel, including:
the display panel is divided into a display area and a non-display area surrounding the display area;
the display panel includes:
a first substrate;
the touch control device comprises a plurality of touch control electrodes, a plurality of touch control wires and a driving chip, wherein the touch control electrodes are positioned in a display area, the driving chip is positioned in a non-display area, and the driving chip is electrically connected with the corresponding touch control electrodes through the touch control wires;
at least part of the touch routing comprises a bent part, and the vertical projection of the bent part of the touch routing on the first substrate is positioned in the vertical projection of the touch electrode electrically connected with the touch routing on the first substrate;
the plurality of touch control electrodes comprise a first touch control electrode and a second touch control electrode, and the distance from the first touch control electrode to the driving chip is smaller than the distance from the second touch control electrode to the driving chip; the plurality of touch-control wires comprise a first touch-control wire electrically connected with the first touch-control electrode and a second touch-control wire electrically connected with the second touch-control electrode, and the total length of the bent part of the first touch-control wire is greater than that of the bent part of the second touch-control wire.
In a second aspect, the embodiment of the present invention further provides a display device including the display panel of the first aspect.
The embodiment of the invention provides a display panel and a display device, wherein the display panel comprises a first substrate, a plurality of touch electrodes, a plurality of touch wires and a driving chip, the touch electrodes, the touch wires and the driving chip are positioned on the first substrate, the touch electrodes are positioned in a display area, the driving chip is positioned in a non-display area, and the driving chip is electrically connected with the corresponding touch electrodes through the touch wires. At least part of the touch wires are arranged to include bent parts, and the vertical projection of the bent parts of the touch wires on the first substrate is located in the vertical projection of the touch electrodes electrically connected with the touch wires on the first substrate. The plurality of touch control electrodes comprise a first touch control electrode and a second touch control electrode, the distance from the first touch control electrode to the driving chip is smaller than the distance from the second touch control electrode to the driving chip, the plurality of touch control wires comprise a first touch control wire electrically connected with the first touch control electrode and a second touch control wire electrically connected with the second touch control electrode, and the total length of the bent part of the first touch control wire is larger than that of the bent part of the second touch control wire. By setting the total length of the bent part of the first touch wire electrically connected with the first touch electrode to be greater than the total length of the bent part of the second touch wire, the difference between the total length of the first touch wire and the total length of the second touch wire is reduced, so that the difference between the load on the first touch wire and the load on the second touch wire is reduced, and the difference between the loads on the signal wires connected to the pixel units with different distances from the driving chip in the display panel is reduced, and the touch uniformity and the display uniformity of the display panel are improved. In addition, the vertical projection of the bent part of the touch wire on the first substrate is arranged in the vertical projection of the touch electrode electrically connected with the touch wire on the first substrate, so that the signal crosstalk between the touch wire electrically connected with the touch electrode and other touch electrodes can be effectively reduced, the signal crosstalk between different touch electrodes is further reduced, and the touch accuracy of the display panel is improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic top view of another display panel according to an embodiment of the present invention;
fig. 3 is a schematic top view of another display panel according to an embodiment of the present invention;
fig. 4 is a schematic top view of another display panel according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view taken along the direction BB' in FIG. 4;
fig. 6 is a schematic top view of another display panel according to an embodiment of the present invention;
fig. 7 is a schematic top view of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view taken along the direction CC' in FIG. 4;
fig. 9 is a schematic structural diagram of a touch trace according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures. Throughout this specification, the same or similar reference numbers refer to the same or similar structures, elements, or processes. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The embodiment of the invention provides a display panel, which is divided into a display area and a non-display area surrounding the display area, and comprises a first substrate, a plurality of touch electrodes, a plurality of touch wires and a driving chip, wherein the touch electrodes are positioned on the first substrate, the driving chip is positioned in the non-display area, and the driving chip is electrically connected with the corresponding touch electrodes through the touch wires. At least part of the touch-control wires comprise bent parts, and the vertical projection of the bent parts of the touch-control wires on the first substrate is positioned in the vertical projection of the touch-control electrodes electrically connected with the touch-control wires on the first substrate. The plurality of touch control electrodes comprise a first touch control electrode and a second touch control electrode, and the distance from the first touch control electrode to the driving chip is smaller than the distance from the second touch control electrode to the driving chip; the plurality of touch-control wires comprise first touch-control wires electrically connected with the first touch-control electrodes and second touch-control wires electrically connected with the second touch-control electrodes, and the total length of the bent parts of the first touch-control wires is greater than that of the bent parts of the second touch-control wires.
The total lengths of the touch-control wires electrically connected to the driving chip by the touch-control electrodes having different distances from the driving chip are different, so that the load difference of the touch-control wires electrically connected to the touch-control electrodes having different distances from the driving chip is larger, and the touch-control uniformity of the display panel is poor. In addition, due to the coupling effect between the touch traces and the data signal lines connected to the pixel units in the display panel, the different lengths of the touch traces electrically connected to the driving chip by the touch electrodes having different distances from the driving chip may result in a larger load difference between the data signal lines electrically connected to the pixel units having different distances from the driving chip, thereby resulting in a poorer display uniformity of the display panel.
The embodiment of the invention provides a display panel and a display device, wherein the display panel comprises a first substrate, a plurality of touch electrodes, a plurality of touch wires and a driving chip, the touch electrodes, the touch wires and the driving chip are positioned on the first substrate, the touch electrodes are positioned in a display area, the driving chip is positioned in a non-display area, and the driving chip is electrically connected with the corresponding touch electrodes through the touch wires. At least part of the touch wires are arranged to include bent parts, and the vertical projection of the bent parts of the touch wires on the first substrate is located in the vertical projection of the touch electrodes electrically connected with the touch wires on the first substrate. The plurality of touch control electrodes comprise a first touch control electrode and a second touch control electrode, the distance from the first touch control electrode to the driving chip is smaller than the distance from the second touch control electrode to the driving chip, the plurality of touch control wires comprise a first touch control wire electrically connected with the first touch control electrode and a second touch control wire electrically connected with the second touch control electrode, and the total length of the bent part of the first touch control wire is larger than that of the bent part of the second touch control wire. By setting the total length of the bent part of the first touch wire electrically connected with the first touch electrode to be greater than the total length of the bent part of the second touch wire, the difference between the total length of the first touch wire and the total length of the second touch wire is reduced, so that the difference between the load on the first touch wire and the load on the second touch wire is reduced, and the difference between the loads on the signal wires connected to the pixel units with different distances from the driving chip in the display panel is reduced, and the touch uniformity and the display uniformity of the display panel are improved. In addition, the vertical projection of the bent portion of the touch trace on the first substrate is located in the vertical projection of the touch electrode electrically connected with the touch trace on the first substrate, and compared with the situation that the vertical projection of the bent portion of the touch trace on the first substrate is not completely located in the vertical projection of the touch electrode electrically connected with the touch trace on the first substrate, the signal crosstalk between the touch trace electrically connected with the touch electrode and other touch electrodes can be effectively reduced, so that the signal crosstalk between different touch electrodes is reduced, and the touch accuracy of the display panel is improved.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention. As shown in fig. 1, the display panel is divided into a display area AA and a non-display area NAA surrounding the display area AA, and includes a first substrate 1, and a plurality of touch electrodes 2, a plurality of touch traces 3 and a driving chip 4 on the first substrate 1, where the plurality of touch electrodes 2 are located in the display area AA, the driving chip 4 is located in the non-display area NAA, and the driving chip 4 is electrically connected to the corresponding touch electrodes 2 through the touch traces 3.
Optionally, in this embodiment, one touch trace 3 is electrically connected to one touch electrode 2, that is, the touch electrode 2 and the touch trace 3 are in a one-to-one correspondence relationship. Of course, the corresponding relationship between the touch trace and the touch electrode in other embodiments of the present invention may be different from that in this embodiment, and is not described herein again.
The driving chip 4 sends a touch driving signal to the corresponding touch electrode 2 through the touch trace 3, the touch electrode 2 senses a capacitance change value generated by the touch main body touching the display panel and outputs a touch sensing signal to the driving chip 4, and the driving chip 4 determines the position of the touch main body touching the display panel according to the received driving sensing signal.
At least a portion of the touch trace 3 includes a bent portion a (a portion of the touch trace 3 encircled by a dotted line in fig. 1). The plurality of touch electrodes 2 include a first touch electrode 21 and a second touch electrode 22, a distance from the first touch electrode 21 to the driving chip 4 is smaller than a distance from the second touch electrode 22 to the driving chip 4, it should be noted that fig. 1 only exemplarily shows the first touch electrode 21 and the second touch electrode 22 by two touch electrodes 2, and the first touch electrode 21 may represent a near-end touch electrode and the second touch electrode 22 may represent a far-end touch electrode with respect to a position of the driving chip 4. The plurality of touch traces 3 include a first touch trace 31 electrically connected to the first touch electrode 21 and a second touch trace 32 electrically connected to the second touch electrode 22, and a total length of the bent portion a of the first touch trace 31 is greater than a total length of the bent portion a of the second touch trace 32.
The total length of the bent portion a of the first touch trace 31 is set to be greater than the total length of the bent portion a of the second touch trace 32, and the distance from the first touch electrode 21 electrically connected to the first touch trace 31 to the driving chip 4 is smaller than the distance from the second touch electrode 22 electrically connected to the second touch trace 32 to the driving chip 4, so that the difference between the total lengths of the first touch trace 31 and the second touch trace 32 is reduced, the difference between the load on the first touch trace 31 and the load on the second touch trace 32 is reduced, and the touch uniformity of the display panel is improved. In addition, due to the coupling effect between the touch trace 3 and the data signal line connected to each pixel unit in the display panel, setting the total length of the bent portion a of the first touch trace 31 to be greater than the total length of the bent portion a of the second touch trace 32 can also reduce the difference between loads on the data signal line electrically connected to the pixel units with different distances from the driving chip 4, thereby improving the display uniformity of the display panel. In addition, the vertical projection of the bent portion a of the touch trace 3 on the first substrate 1 is located in the vertical projection of the touch electrode 2 electrically connected to the touch trace 3 on the first substrate 1, and the vertical projection of the bent portion a of the touch trace 3 on the first substrate 1 is not completely located in the vertical projection of the touch electrode 2 electrically connected to the touch trace 3 on the first substrate 1, so that the signal crosstalk between the touch trace 3 electrically connected to the touch electrode 2 and other touch electrodes 2 can be effectively reduced, the signal crosstalk between different touch electrodes 2 can be reduced, and the touch accuracy of the display panel can be improved.
Optionally, the total length of the first touch trace 31 may be set to be the same as the total length of the second touch trace 32. Specifically, as shown in fig. 1, the total length of the touch trace 3 may be a partial trace length of the touch trace 3 located in the display area AA, or a trace length from a corresponding port of the driving chip 4 to a position between the touch trace 3 and the electrical connection point 7 of the touch electrode 2. For example, at least two electrical connection points 7 may be disposed between the touch trace 3 and the corresponding touch electrode 2, fig. 1 exemplarily illustrates that three electrical connection points 71, 72, and 73 exist between the touch trace 3 and the corresponding touch electrode 2, and compared with the case that only one electrical connection point 7 exists between the touch trace and the corresponding touch electrode 2, the uniformity of distribution of the touch signal transmitted by the driving chip 4 through the touch trace 3 on the touch electrode 2 is improved, and the problem that the touch signal cannot be transmitted to the touch electrode 2 due to poor contact of one electrical connection point 7 between the touch trace 3 and the touch electrode 2 is reduced. The total length of the touch traces 3 can be regarded as the trace length from the corresponding port of the driving chip 4 to the electrical connection point 71 between the touch trace 3 and the touch electrode 2.
Setting the total length of the first touch trace 31 to be the same as the total length of the second touch trace 32, which may be setting the length of the trace of the first touch trace 31 located in the display area AA to be the same as the length of the trace of the second touch trace 32 located in the display area AA, or setting the length of the trace from the corresponding port of the driving chip 4 to the electrical connection point 71 of the first touch electrode 21 and the first touch trace 31 to be the same as the length of the trace from the corresponding port of the driving chip 4 to the electrical connection point 71 of the second touch electrode 22 and the second touch trace 32, so that the overlapping area between the first touch trace 31 and the first touch electrode 21 is the same as the overlapping area between the second touch trace 32 and the second touch electrode 22, and the total resistance of the first touch trace 31 corresponding to the total length of the first touch trace 31 is the same as the total resistance of the second touch trace 32 corresponding to the total length of the second touch trace 32, the load on the first touch trace 31 is consistent with the load on the second touch trace 32, and the touch uniformity and the display uniformity of the display panel are greatly improved.
It should be noted that, under the influence of the process conditions, the total length of the first touch trace 31 and the total length of the second touch trace 32 cannot be completely the same, and the reference that the total length of the first touch trace 31 and the total length of the second touch trace 32 are the same means that the total length of the first touch trace 31 and the total length of the second touch trace 32 are approximately the same within the process tolerance range.
For example, as shown in fig. 1, the bent portion a of the touch trace 3 may be disposed in a serpentine trace shape, the bent portion a of the touch trace 3 includes a first sub-segment a1 extending along a first direction YY and a second sub-segment a2 extending along a second direction XX, the first sub-segment a1 is alternately connected to the second sub-segment a2, the first direction YY intersects the second direction XX, and the first direction YY and the second direction XX are disposed perpendicular to each other. The touch trace 3 further includes an extending trace portion b except the bent portion a, and the extending trace portion b extends from the display area AA to the non-display area NAA along the first direction YY, one end of the bent portion a is electrically connected to the corresponding touch electrode 2 through an electrical connection point 7, and the other end of the bent portion a is electrically connected to the driving chip 4 through the extending trace portion b.
Illustratively, as shown in fig. 1, the overall extending direction of the bent portion a is the second direction XX, that is, assuming that the bent portion a is not limited, the bent portion a is alternately arranged in an infinite loop according to the first sub-segment a1 and the second sub-segment a2 in this embodiment, and finally the overall extending direction of the bent portion a extends along the second direction XX. That is, in the first direction YY, the second sub-segment a2 is staggered and there is no overlap, i.e. the second sub-segment a2 provides the overall routing direction of the bent portion a. Along the first direction YY, the first sub-segments a1 may be arranged to extend to both sides to the edge of the corresponding touch electrodes 2, where the shape of the touch electrodes 2 is exemplarily arranged to be rectangular, that is, the length of the first sub-segments a1 along the first direction YY is arranged to be equal to the length of the corresponding touch electrodes 2 along the first direction YY. Specifically, the first sub-segment a1 extends to the edge of the corresponding touch electrode 2 along the first direction YY, so that the touch trace 3 can be routed along the first direction YY with the maximum length on the basis that the vertical projection of the bent portion a of the touch trace 3 on the first substrate 1 is located in the vertical projection of the touch electrode 2 electrically connected to the touch trace 3 on the first substrate 1 to reduce the signal crosstalk between different touch electrodes 3, and the width of the bent portion a of the touch trace 3 along the second direction XX is reduced for the total length of the same bent portion a of the touch trace 3, for example, for the first touch electrode 21 in fig. 1, the width of the bent portion a along the second direction XX is d1, the smaller the distance to the driving chip 4 is, the smaller the space for the touch electrode 2 to form the bent portion a of the touch trace 3 along the second direction XX, along the first direction YY, the first sub-segments a1 extend to the edges of the corresponding touch electrodes 2 from both sides, so that the limitation of the length of the touch electrodes 2 along the second direction XX on the formation of the bent portion a of the touch trace 3 is greatly reduced.
For example, as shown in fig. 1, the touch electrodes 2 may be arranged in a matrix, the row of touch electrodes 2 having the largest distance to the driving chip 4 is the first row of touch electrodes 2, and the bent portion a of the touch trace 3 electrically connected to the (n + 1) th row of touch electrodes 2 may include n first sub-segments a1, where n is a positive integer. For example, n is equal to 1, that is, the bent portion a of the touch trace 3 electrically connected to the second row of touch electrodes 2 includes a first sub-segment a 1; n is equal to 2, that is, the bent portion a of the touch trace 3 electrically connected to the third row of touch electrodes 2 includes two first sub-segments a 1; n is equal to 3, that is, the bent portion a of the touch trace 3 electrically connected to the fourth row of touch electrodes 2 includes three first sub-segments a1, and so on. On the basis that the first sub-segments a1 extend to the edges of the corresponding touch electrodes 2 along the first direction YY toward both sides, the bent portion a of the touch trace 3 electrically connected to the (n + 1) th row of touch electrodes 2 includes n first sub-segments a1, which is more favorable for achieving the equal total length of the touch traces 3, and is favorable for setting the equal total length of the touch traces 3 to improve the consistency of the load on the touch traces 3, thereby improving the touch uniformity and the display uniformity of the display panel.
In addition, for the pixel electrodes arranged in a matrix, on the basis that the first sub-segments a1 extend to the edges of the corresponding touch electrodes 2 along the first direction YY towards both sides, the bent portion a of the touch trace 3 electrically connected with the (n + 1) th row of touch electrodes 2 includes n first sub-segments a1, so that the number of the first sub-segments a1 in the touch trace 3 is uniformly changed along the direction away from the driving chip 4, that is, along the direction far away from the driving chip 4, the number of the first sub-segments a1 in the touch trace 3 is in an arithmetic progression, so as to improve the regularity of the wiring, avoid abrupt change of the number of the first sub-segments a corresponding to the adjacent touch electrodes 2 along the first direction YY, the number difference of the first subsections a corresponding to the adjacent touch electrodes 2 is too large, which affects the display effect of the display panel, meanwhile, the layout of the wires is facilitated, and the problem of disordered arrangement of the touch wires 3 in the process of forming the snake-shaped wires is avoided.
Fig. 2 is a schematic top view of another display panel according to an embodiment of the present invention. Unlike the display panel with the structure shown in fig. 1, in the display panel with the structure shown in fig. 2, along the first direction YY, the length of the first sub-segment a1 of the first touch trace 31 is greater than the length of the first sub-segment a1 of the second touch trace 32, that is, along the first direction YY and toward the driving chip 4, the length of the first sub-segment a1 of the touch trace 3 increases continuously. Specifically, the distance from the first touch electrode 21 to the driving chip 4 is less than the distance from the second touch electrode 22 to the driving chip 4, the length of the extension trace portion b in the first touch trace 31 electrically connected to the first touch electrode 21 along the first direction YY is less than the length of the extension trace portion b in the second touch trace 32 electrically connected to the second touch electrode 21 along the first direction YY, and in order to reduce the difference between the total length of the first touch trace 31 and the total length of the second touch trace 32, the total length of the bent portion a in the second touch trace 32 is less than the total length of the bent portion a in the first touch trace 31. Along the first direction YY, if the length of the first sub-segment a1 of the first touch trace 31 is equal to the length of the first sub-segment a1 of the second touch trace 32, the number of the first sub-segment a1 of the second touch trace 32 is inevitably smaller than the number of the first sub-segment a1 of the first touch trace 31, and the length of the first sub-segment a1 of the first touch trace 31 is larger than the length of the first sub-segment a1 of the second touch trace 32 along the first direction YY, so that the number of the first sub-segment a1 of the second touch trace 32 is increased, and further, the uniformity of the distribution of the first sub-segment a1 of the second touch trace 32 in the second direction XX in the area where the second touch electrode 22 is located is improved, so that the bent portion a corresponding to each touch electrode can be overlapped with the touch electrode more uniformly, and the uniformity of the performance of each area in each touch electrode is improved. Moreover, compared with the touch electrode far away from the driving chip, the electrode close to the driving chip is also provided with: through the wiring (i.e. the extended wiring part of other wirings) passing through the touch electrode but connected to the touch electrode on the side of the touch electrode away from the driving chip, the bending part can compensate the difference of the number of the extended wiring parts arranged on the touch electrode away from the driving chip, so that the load difference between different touch electrodes and the wiring can be improved, and the problem of visible patterns can be solved.
Fig. 3 is a schematic top view of another display panel according to an embodiment of the present invention. Unlike the display panel with the structure shown in fig. 1 and 2, the display panel with the structure shown in fig. 3 may be configured such that the overall extending direction of the bent portion a is the first direction YY, that is, the bent portion a is not limited, such that the bent portions a are alternately arranged according to the first sub-segment a1 and the second sub-segment a2 in an infinite cycle, and finally the extending direction of the entire bent portion a extends along the first direction YY. That is, in the second direction XX, the first sub-segment a1 is staggered and has no overlap, i.e. the first sub-segment a1 provides the overall routing direction of the bent portion a. Similarly, by setting the total length of the bent portion a of the first touch trace 31 to be greater than the total length of the bent portion a of the second touch trace 32, the difference between the total length of the first touch trace 31 and the total length of the second touch trace 32 can be reduced, so as to reduce the difference between the load on the first touch trace 31 and the load on the second touch trace 32, and the difference between the loads on the signal lines connected to the pixel units with different distances to the driving chip 4 in the display panel, thereby improving the touch uniformity and the display uniformity of the display panel. Similarly, the vertical projection of the bent portion a of the touch trace 3 on the first substrate 1 may be located in the vertical projection of the touch electrode 2 electrically connected to the touch trace 3 on the first substrate 1, so as to reduce the signal crosstalk between the touch trace 3 electrically connected to the touch electrode 2 and other touch electrodes 2, further reduce the signal crosstalk between different touch electrodes 2, and improve the touch accuracy of the display panel.
Referring to fig. 1 and 2, the overall extending direction of the bent portion a is the second direction XX, and along the second direction XX, a distance d2 between the extending trace portion b (the portion of the touch trace 3 circled by the dotted line in fig. 1) and the adjacent first sub-segment a1 and a distance d3 between the adjacent first sub-segments a1 may be equal to a distance d4 between the adjacent extending trace portions b. Specifically, along the direction perpendicular to the plane where the display panel is located, the position where the metal trace is located reflects light incident from the display side of the display panel, so that a pattern arranged at the position is visible, and human eyes are sensitive to differences of the visible pattern, and along the second direction XX, the distance d2 between the extending trace portion b and the adjacent first sub-segment a1 and the distance d3 between the adjacent first sub-segments a1 are equal to the distance d4 between the adjacent extending trace portions b, so that the portions of the touch trace 3 extending along the first direction YY are uniformly arranged along the second direction XX, the sensitivity of the human eyes to the visible pattern is reduced, and further, the influence of the visible pattern on the display effect of the display panel is reduced.
Fig. 4 is a schematic top view of another display panel according to an embodiment of the present invention, and fig. 5 is a schematic cross-sectional view along the direction BB' in fig. 4. As shown in fig. 4, the display panel may further include a plurality of data signal lines 51 and a plurality of scan signal lines 52 on the first substrate 1, the data signal lines 51 are arranged to extend along the first direction YY, the scan signal lines 52 are arranged to extend along the second direction XX, the display panel may further include a plurality of pixel driving circuits 53 and a plurality of light emitting structures 54, the pixel driving circuits 53 are only exemplarily represented by one thin film transistor, and an internal actual structure of the pixel driving circuits 53 is obtained. In the display area AA of the display panel, the pixel driving circuit 53 and the light emitting structure 54 are disposed in a space formed by intersecting the scanning signal line 52 and the data signal line 51, the pixel driving circuit 53 communicates the data signal line 51 and the light emitting structure 54 electrically connected thereto under the action of the scanning signal transmitted by the scanning signal line 52 electrically connected thereto, the data signal line 51 transmits the data signal to the corresponding light emitting structure 54, and the display panel accordingly achieves the display function.
Referring to fig. 1, 2, 4 and 5, the data signal line 51 and the touch trace 3 are electrically insulated and have different layers, and the display panel may be disposed along a direction away from the first substrate 1, and sequentially include a first metal layer M1, a second metal layer M2 and a third metal layer M3, the pixel driving circuit 53 of the display panel includes at least one thin film transistor (not shown in fig. 5), a gate of the thin film transistor is disposed on the first metal layer M1, a source and a drain of the thin film transistor are disposed on the second metal layer M2, the data signal line 51 may be disposed on the second metal layer M2, and the touch trace 3 is disposed on the second metal layer M2 away from the third metal layer M3 disposed on the first substrate 1, so as to electrically insulate the data signal line 51 and the touch trace 3 and have different layers. The extending trace portion b of the touch trace 3 and the vertical projection of the first sub-segment a1 on the first substrate 1 are overlapped with the vertical projection of the corresponding data signal line 51 on the first substrate 1. For example, the data signal lines 51 extending along the first direction YY are generally uniformly arranged along the second direction XX, that is, the distances between the adjacent data signal lines 51 along the second direction XX are equal, the distance d2 between the extended trace portion b and the adjacent first sub-segment a1 and the distance d3 between the adjacent first sub-segment a1 along the second direction XX are equal to the distance d4 between the adjacent extended trace portions b, and the vertical projection of the extended trace portion b and the first sub-segment a1 of the touch trace 3 on the first substrate 1 and the vertical projection of the corresponding data signal line 51 on the first substrate 1 are arranged to have an overlapping portion, so that along a direction perpendicular to the plane of the display panel, the portion of the touch trace 3 extending along the first direction YY, that is, the extended portion b and the first sub-segment a trace 1 are both located directly above the data signal line 51, thereby reducing the difference in capacitance between the portion of the different touch traces 3 extending along the first direction YY and the data signal lines 51, the difference of the loads on the portions of the different touch traces 3 extending along the first direction YY is reduced, and the difference of the loads on the different data signal lines 51 is reduced, so that the touch uniformity and the display uniformity of the display panel are further improved.
It should be noted that fig. 1 to 3 only exemplarily show the pitch of the touch traces 3 along the second direction XX, fig. 5 merely exemplarily shows the pitch of the data signal lines 51 along the second direction XX and the pitch of the scan signal lines 51 along the first direction YY, and does not represent an actual arrangement pitch, and specific values of the pitch of the touch traces 3 along the second direction XX, the pitch of the data signal lines 51 along the second direction XX and the pitch of the scan signal lines 51 along the first direction YY are not limited in the embodiments of the present invention.
Fig. 6 is a schematic top view of another display panel according to an embodiment of the present invention. Fig. 6 shows only an exemplary four rows and one column of touch electrodes, and in conjunction with fig. 1 and fig. 6, the display panel may further include a plurality of conductive sub-portion groups 61, each of the conductive sub-portion groups 61 includes a plurality of discretely distributed conductive sub-portions 611, each of the conductive sub-portions 611 extends along the second direction XX, the overall extending direction of the bent portion a is the second direction XX, the distances between adjacent conductive structures 60 along the first direction YY may be equal, and the second sub-portions a2 and the conductive sub-portions 611 are both referred to as the conductive structures 60. Specifically, in the direction perpendicular to the plane of the display panel, the position where the metal trace is disposed may reflect light incident from the display side of the display panel, so that the pattern disposed at the position is visible, the second sub-segment a2 and the conductive sub-segment 611 are both referred to as the conductive structure 60, and the distances between adjacent conductive structures 60 are equal along the first direction YY, so that along the first direction YY, the second sub-segment a2 and the conductive sub-segment 611 are uniformly arranged in the display area AA of the display panel, and are not uniformly arranged along the first direction YY relative to the non-disposed conductive sub-segment 611 or the second sub-segment a2 and the conductive sub-segment 611, so that the visible patterns in the display area of the display panel are uniformly arranged, and the sensitivity of human eyes to the visible pattern is reduced, thereby reducing the influence of the visible pattern on the display effect of the display panel. Similarly, in the display panel with the structure shown in fig. 2, the conductive sub-portions can be arranged in the manner of referring to the arrangement of the conductive sub-portions in fig. 6, as shown in fig. 7, which is not described herein again.
Fig. 8 is a schematic cross-sectional view taken along direction CC' in fig. 4. With reference to fig. 4 and fig. 6 to 8, the scan signal line 52 is disposed to be electrically insulated from the touch trace 3 and the conductive sub-portion 611 and have different layers, and similarly, the display panel may be disposed along a direction away from the first substrate 1, and sequentially include a first metal layer M1, a second metal layer M2 and a third metal layer M3, a gate of a thin film transistor (not shown in fig. 8) in the display panel is disposed on the first metal layer M1, a source and a drain of the thin film transistor are disposed on the second metal layer M2, the scan signal line 53 may be disposed on the first metal layer M1, and the touch trace 3 and the conductive sub-portion 611 are both disposed on the third metal layer M3 at a side of the first metal layer M1 away from the first substrate 1, so as to implement that the scan signal line 52 is electrically insulated from the touch trace 3 and the conductive sub-. The conductive sub-portions 611 are electrically connected to the corresponding touch electrodes 2, that is, the conductive sub-portions 611 located in the area where the touch electrodes 2 are located are electrically connected to the touch electrodes 2. The distance between the adjacent conductive structures 60 is equal to the distance between the adjacent scan signal lines 52 in the first direction YY. Specifically, the second sub-segment a2 and the conductive sub-segment 611 are both referred to as the conductive structures 60, the scan signal lines 52 extending along the second direction XX are generally uniformly arranged along the first direction YY, that is, the distances between the adjacent scan signal lines 52 along the first direction YY are equal, the conductive sub-segments 611 are electrically connected to the corresponding touch electrodes 2, so that the touch signals output by the driving chip 4 are transmitted to the conductive sub-segments 611, and the distance between the adjacent conductive structures 60 is set to be equal to the distance between the adjacent scan signal lines 52, so as to reduce the difference in capacitance between different scan signal lines 52 and the conductive structures 60, further reduce the difference in load on different scan signal lines 52, and further improve the display uniformity of the display panel.
Alternatively, referring to fig. 6 to fig. 7, the conductive sub-portions 611 and the touch trace 3 may be disposed in the same layer and electrically insulated, and the conductive sub-portions 611 between different conductive sub-portions 61 are electrically insulated. Specifically, since the conductive sub-portions 611 are electrically connected to the corresponding touch electrodes 2, the conductive sub-portions 611 are disposed on the same layer as the touch traces 3 and are electrically insulated, and the conductive sub-portions 611 between different conductive sub-portions 61 are electrically insulated, crosstalk of signals between different touch electrodes 2 and different touch traces 3 is avoided without affecting the thickness of the display panel, and the touch accuracy of the display panel is improved.
Optionally, the electrical connection points of the touch traces and the touch electrodes may be disposed at one end of the corresponding bent portion, which is not connected to the extending trace portion. Referring to fig. 1 and 2, the electrical connection point 7 of the touch trace 3 and the touch electrode 2 is disposed at an end of the corresponding bent portion a not connected to the extended trace portion b, and the electrical connection point 7 of the touch trace 3 and the touch electrode 2 may be disposed on the corresponding first sub-segment a1 along the second direction XX with the largest distance to the extended trace portion b. Referring to fig. 3, the electrical connection point 7 of the touch trace 3 and the touch electrode 2 is disposed at one end of the corresponding bent portion a not connected to the extended trace portion b, and the electrical connection point 7 of the touch trace 3 and the touch electrode 2 may be disposed on the second sub-segment a2 at the end of the first sub-segment a1 and the second sub-segment a2 which are alternately connected. The electrical connection points 7 of the touch traces 3 and the touch electrodes 2 are disposed at one end of the corresponding bent portion a, which is not connected to the extension trace portion b, the total length of the touch traces 3 can be the trace length from the corresponding port of the driving chip 4 to the corresponding electrical connection points 7 of the touch traces 3 and the touch electrodes 2, the total length of the bent portion a of the first touch trace 31 is set to be greater than the total length of the bent portion a of the second touch trace 32, which is beneficial to reducing the difference between the total length of the first touch trace 31 and the total length of the second touch trace 32, thereby reducing the difference between the load on the first touch trace 31 and the load on the second touch trace 32, and improving the touch uniformity of the display panel.
Alternatively, referring to fig. 1 to 2, the entire extending direction of the bent portion a is the second direction XX, the display panel may be set to be right side up, the width of the display area AA of the display panel along the second direction XX is greater than the width of the display area AA of the display panel along the first direction YY, and the width of the touch electrode 2 along the second direction XX is greater than the width of the touch electrode 2 along the first direction YY. Note that the case where the display panel is placed right here means that when the display panel is placed right, the screen is normally displayed, and the display screen of the display panel viewed by the user is displayed in the same forward direction, for example, the numeral 8 is displayed as a pattern 8 instead of a pattern ∞.
Specifically, along the first direction, the length of the extending trace portion b in the touch trace 3 corresponding to the touch electrode 2 closer to the driving chip 4 is smaller, so as to reduce the difference of the total lengths of different touch traces 3, the total length of the bending portion a in the touch trace 3 corresponding to the touch electrode 2 closer to the driving chip 4 is larger along the first direction YY. When the display panel is placed, the width of the touch electrode 2 along the second direction XX is greater than the width of the touch electrode 2 along the first direction YY, which is beneficial to increasing the space for the touch electrode 2 with the closer distance to the driving chip 4 to supply the bending trace of the touch trace 3 along the second direction XX, the requirement that the total length of the bent portion a of the touch trace 3 corresponding to the touch electrode 2 close to the driving chip 4 is large is met, an advantage is provided for reducing the difference between the total length of the first touch trace 31 and the total length of the second touch trace 32, and an advantage is provided for setting the width of the display area AA of the display panel along the second direction XX to be larger than the width of the display area AA of the display panel along the first direction YY when the display panel is placed forward, and setting the width of the touch electrode 2 along the second direction XX to be larger than the width of the touch electrode 2 along the first direction YY when the display panel is placed forward.
Fig. 1 to 3 only exemplarily set the bent portion a of the touch trace 3 to be a serpentine trace shape, and may also set the bent portion a of the touch trace 3 to be a spiral trace shape, as shown in fig. 9, the bent portion a of the touch trace 3 is set to be the spiral trace shape, so that the point of the electrical connection 7 between the touch trace 3 and the corresponding touch electrode 2 is closer to the center of the touch electrode 2, which is beneficial to transmitting the touch signal to each area of the touch electrode, and further improves the touch accuracy of the display panel.
It should be noted that the drawings of the embodiments of the present invention only show the sizes of the elements by way of example, and do not represent the actual sizes of the elements in the display panel.
The embodiment of the invention provides a display panel and a display device, wherein the display panel comprises a first substrate, a plurality of touch electrodes, a plurality of touch wires and a driving chip, the touch electrodes, the touch wires and the driving chip are positioned on the first substrate, the touch electrodes are positioned in a display area, the driving chip is positioned in a non-display area, and the driving chip is electrically connected with the corresponding touch electrodes through the touch wires. At least part of the touch wires are arranged to include bent parts, and the vertical projection of the bent parts of the touch wires on the first substrate is located in the vertical projection of the touch electrodes electrically connected with the touch wires on the first substrate. The plurality of touch control electrodes comprise a first touch control electrode and a second touch control electrode, the distance from the first touch control electrode to the driving chip is smaller than the distance from the second touch control electrode to the driving chip, the plurality of touch control wires comprise a first touch control wire electrically connected with the first touch control electrode and a second touch control wire electrically connected with the second touch control electrode, and the total length of the bent part of the first touch control wire is larger than that of the bent part of the second touch control wire. By setting the total length of the bent part of the first touch wire electrically connected with the first touch electrode to be greater than the total length of the bent part of the second touch wire, the difference between the total length of the first touch wire and the total length of the second touch wire is reduced, so that the difference between the load on the first touch wire and the load on the second touch wire is reduced, and the difference between the loads on the signal wires connected to the pixel units with different distances from the driving chip in the display panel is reduced, and the touch uniformity and the display uniformity of the display panel are improved. In addition, the vertical projection of the bent portion of the touch trace on the first substrate is located in the vertical projection of the touch electrode electrically connected with the touch trace on the first substrate, and compared with the situation that the vertical projection of the bent portion of the touch trace on the first substrate is not completely located in the vertical projection of the touch electrode electrically connected with the touch trace on the first substrate, the signal crosstalk between the touch trace electrically connected with the touch electrode and other touch electrodes can be effectively reduced, so that the signal crosstalk between different touch electrodes is reduced, and the touch accuracy of the display panel is improved.
An embodiment of the present invention further provides a display device, and fig. 10 is a schematic structural diagram of the display device provided in the embodiment of the present invention. As shown in fig. 10, the display device 20 includes the display panel 19 in the above embodiment, so that the display device 20 provided in the embodiment of the present invention also has the beneficial effects described in the above embodiment, and further description is omitted here. Illustratively, the display device 20 may include an electronic paper display device, a liquid crystal display device, and an organic light emitting diode display device. The display device 20 may be an electronic display device such as a mobile phone, a computer, a television, and an intelligent wearable device.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (16)
1. A display panel, wherein the display panel is divided into a display area and a non-display area surrounding the display area;
the display panel includes:
a first substrate;
the touch control device comprises a plurality of touch control electrodes, a plurality of touch control wires and a driving chip, wherein the touch control electrodes are positioned in a display area, the driving chip is positioned in a non-display area, and the driving chip is electrically connected with the corresponding touch control electrodes through the touch control wires;
at least part of the touch routing comprises a bent part, and the vertical projection of the bent part of the touch routing on the first substrate is positioned in the vertical projection of the touch electrode electrically connected with the touch routing on the first substrate;
the plurality of touch control electrodes comprise a first touch control electrode and a second touch control electrode, and the distance from the first touch control electrode to the driving chip is smaller than the distance from the second touch control electrode to the driving chip; the plurality of touch control wires comprise first touch control wires electrically connected with the first touch control electrodes and second touch control wires electrically connected with the second touch control electrodes, and the total length of the bent parts of the first touch control wires is greater than that of the bent parts of the second touch control wires;
the bending part of the touch routing line comprises a first subsection and a second subsection, wherein the first subsection extends along a first direction, the second subsection extends along a second direction, and the first subsection and the second subsection are alternately connected; wherein the first direction intersects the second direction;
the touch-control routing also comprises an extension routing part except the bending part, the extension routing part extends from the display area to the non-display area along the first direction, one end of the bending part is electrically connected with the corresponding touch-control electrode, and the other end of the bending part is electrically connected with the driving chip through the extension routing part.
2. The display panel of claim 1, wherein a total length of the first touch trace is the same as a total length of the second touch trace.
3. The display panel of claim 1, wherein the bent portion of the touch trace is in a shape of a serpentine trace.
4. The display panel according to claim 1, wherein the entire extending direction of the bent portion is the second direction; along the first direction, the length of the first subsection of the first touch wire is greater than that of the first subsection of the second touch wire.
5. The display panel according to claim 1, wherein the entire extending direction of the bent portion is the second direction; along the first direction, the first subsections extend to the edges of the corresponding touch electrodes along two sides.
6. The display panel according to claim 5, wherein the touch electrodes are arranged in a matrix, the row of the touch electrodes having the largest distance to the driving chip is a first row of the touch electrodes, and the bent portion of the touch trace electrically connected to the (n + 1) th row of the touch electrodes includes n first subsections; wherein n is a positive integer.
7. The display panel according to claim 1, wherein the entire extending direction of the bent portion is the second direction; along the second direction, the distance between the extending routing portion and the adjacent first sub-segment and the distance between the adjacent first sub-segments are equal to the distance between the adjacent extending routing portions.
8. The display panel according to claim 7, further comprising:
the data signal lines are arranged on the first substrate in an extending mode along the first direction, are electrically insulated from the touch control wiring lines and are in different layers;
and the extended routing part and the vertical projection of the first subsection on the first substrate have an overlapping part with the vertical projection of the corresponding data signal line on the first substrate.
9. The display panel according to claim 1, further comprising:
a plurality of conductive sub-sections, the conductive sub-sections comprising a plurality of discretely distributed conductive sub-sections, the conductive sub-sections extending along the second direction;
the touch routing wires are wound along the first direction to form the bent part; the distances between adjacent conductive structures along the first direction are equal, and the second subsegment and the conductive subsegment are both referred to as the conductive structures.
10. The display panel according to claim 9, further comprising:
a plurality of scanning signal lines on the first substrate, the scanning signal lines extending in the second direction and being electrically insulated from the touch traces and the conductive sub-portions by different layers;
the conductive sub-parts are electrically connected with the corresponding touch electrodes; in the first direction, a distance between adjacent conductive structures is equal to a distance between adjacent scanning signal lines.
11. The display panel of claim 9, wherein the conductive sub-portions are fabricated on the same layer as the touch traces and are electrically isolated from each other, and the conductive sub-portions between different sets of conductive sub-portions are electrically isolated from each other.
12. The display panel of claim 1, wherein the touch traces and the corresponding touch electrodes have at least two electrical connection points.
13. The display panel according to claim 1, wherein electrical connection points of the touch traces and the touch electrodes are disposed at one end of the corresponding bent portion not connected to the extending trace portion.
14. The display panel according to claim 1, wherein the entire extending direction of the bent portion is the second direction; the display panel is placed right side by side, and the width of the display area of the display panel along the second direction is larger than the width of the display area of the display panel along the first direction.
15. The display panel according to claim 14, wherein the display panel is laid right on, and a width of the touch electrode in the second direction is larger than a width of the touch electrode in the first direction.
16. A display device characterized by comprising the display panel according to any one of claims 1 to 15.
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| CN112328108A (en) * | 2019-08-05 | 2021-02-05 | 鸿富锦精密工业（深圳）有限公司 | Touch module and touch display device |
| CN111142704B (en) * | 2019-12-13 | 2023-10-31 | 武汉华星光电技术有限公司 | Array substrate and touch display panel |
| CN111158535A (en) * | 2019-12-26 | 2020-05-15 | 武汉华星光电半导体显示技术有限公司 | Wiring structure of touch panel |
| CN111399697A (en) | 2020-04-30 | 2020-07-10 | 武汉华星光电技术有限公司 | Thin film transistor array substrate and touch display panel |
| CN111665998B (en) * | 2020-07-09 | 2022-01-04 | 武汉华星光电半导体显示技术有限公司 | Touch control display panel |
| CN112783366B (en) * | 2020-12-16 | 2023-02-03 | 武汉华星光电半导体显示技术有限公司 | Touch control display panel |
| CN112578940B (en) * | 2020-12-18 | 2022-06-10 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| CN113064512A (en) * | 2021-03-11 | 2021-07-02 | 武汉华星光电半导体显示技术有限公司 | Display device and electronic apparatus |
| CN113064514A (en) * | 2021-03-15 | 2021-07-02 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| CN112860123B (en) * | 2021-03-19 | 2024-04-05 | 京东方科技集团股份有限公司 | Touch panel, display panel and display device |
| CN113342205B (en) * | 2021-06-17 | 2024-03-15 | 京东方科技集团股份有限公司 | Touch panel and touch display device |
| CN114578997A (en) * | 2022-03-11 | 2022-06-03 | Tcl华星光电技术有限公司 | Display panel |
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| KR20150011583A (en) * | 2013-07-23 | 2015-02-02 | 엘지디스플레이 주식회사 | Display apparatus |
| CN104536604A (en) * | 2014-12-22 | 2015-04-22 | 深圳市华星光电技术有限公司 | Touch display panel and touch display device |
| CN205563508U (en) * | 2016-02-04 | 2016-09-07 | 天马微电子股份有限公司 | Array substrate and touch -control display screen |
| CN206178745U (en) * | 2016-11-03 | 2017-05-17 | 上海天马微电子有限公司 | Display device |
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