CN108255361A - Touch display panel, driving method thereof and touch display device - Google Patents
Touch display panel, driving method thereof and touch display device Download PDFInfo
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- CN108255361A CN108255361A CN201810193560.1A CN201810193560A CN108255361A CN 108255361 A CN108255361 A CN 108255361A CN 201810193560 A CN201810193560 A CN 201810193560A CN 108255361 A CN108255361 A CN 108255361A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000004973 liquid crystal related substance Substances 0.000 claims description 18
- 230000001788 irregular Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 abstract description 18
- 239000000758 substrate Substances 0.000 description 15
- 238000010586 diagram Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 8
- 230000001808 coupling effect Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004984 smart glass Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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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
- 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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Abstract
The embodiment of the invention discloses a touch display panel, a driving method thereof and a touch display device, wherein in the touch display panel, the orthographic projection of second wires on a touch electrode layer is not overlapped with second electrodes corresponding to the second wires, and the second electrodes and first electrodes are electrically connected to the same common voltage signal in a display stage, so that when the touch display panel works in the display stage, the common voltages at all positions of the touch display panel are the same, the common voltages corresponding to all pixel units in the touch display panel are ensured to be equal, the phenomenon of uneven display of the touch display panel is relieved, and the display quality of the touch display panel is improved. In addition, in the touch control stage of the touch control display panel, the second electrode is electrically connected with a constant voltage signal, so that the voltage on the first electrode is prevented from being coupled to the second electrode, the voltage on the second electrode is changed, the constant value cannot be ensured, and the touch control detection function of the touch control display panel is prevented from being influenced.
Description
Technical Field
The present invention relates to the field of touch technologies, and in particular, to a touch display panel, a driving method thereof, and a touch display device including the touch display panel.
Background
In recent years, the special-shaped display technology is beginning to be applied to various fields such as smart watches, mobile phones, smart bracelets, vehicles, industrial control and the like in a large quantity. In addition, in order to maximize the area of the display area of the touch display panel and increase the proportion of the display area in the touch display panel, the display area of the touch display panel is also set to be in various irregular shapes (i.e., the shape of the display area in the touch display panel is not rectangular or square). With the development of society, people also put higher and higher requirements on the application of irregular display panels such as circles, regular polygons, irregular shapes and the like.
In addition, the touch screen technology has gradually replaced the key technology as the mainstream technology of the mobile terminal and the like. The touch screen technology is a technology in which when a finger, a pen, or the like touches a touch screen mounted on the front end of a display, a touched position (in the form of coordinates) is detected and sent to a CPU, thereby specifying input information. At present, the application range of the touch screen is very wide, and the main products include touch mobile phones, notebook computers and other mobile terminals, and human-computer display interfaces in the industrial automation industry.
The special-shaped display screen with the touch function is an important development direction of display technology, wherein a touch function layer is manufactured inside a display panel by an embedded (cell) special-shaped display touch panel, so that the display panel is convenient to thin and design, the process is simple to prepare, and the special-shaped display screen is a research hotspot in the industry. How to improve the display and touch performance of the in-cell type special-shaped display touch panel is an important technical problem facing the industry today.
Disclosure of Invention
In order to solve the above technical problems, embodiments of the present invention provide a touch display panel, a driving method thereof, and a touch display device including the touch display panel, so as to improve the display quality and the touch performance of a special-shaped touch display panel.
In order to solve the above problems, the embodiments of the present invention provide the following technical solutions:
a touch display panel, comprising:
the touch control electrode layer comprises a plurality of block electrodes positioned in a touch control area of the touch control display panel, and the plurality of block electrodes comprise a first electrode and a second electrode;
a touch routing layer including a plurality of traces including a first trace corresponding to the first electrode and a second trace corresponding to the second electrode, wherein,
the orthographic projection of the first wires on the touch electrode layer is overlapped with the corresponding first electrodes, the first wires are electrically connected with the corresponding first electrodes through via holes, and the orthographic projection of the second wires on the touch electrode layer is not overlapped with the corresponding second electrodes;
the touch display panel is provided with a display stage and a touch stage, the first electrode and the second electrode are connected with the same common voltage signal in the display stage, the first electrode is used as a touch electrode and connected with a touch signal in the touch stage, and the second electrode is connected with a constant voltage signal.
A touch display device comprising the touch display panel is provided.
A driving method of a touch display panel, the touch display panel comprising:
the touch control electrode layer comprises a plurality of block electrodes positioned in a touch control area of the touch control display panel, and the plurality of block electrodes comprise a first electrode and a second electrode;
a touch routing layer including a plurality of traces including a first trace corresponding to the first electrode and a second trace corresponding to the second electrode, wherein,
the orthographic projection of the first wires on the touch electrode layer is overlapped with the corresponding first electrodes, the first wires are electrically connected with the corresponding first electrodes through via holes, and the orthographic projection of the second wires on the touch electrode layer is not overlapped with the corresponding second electrodes;
the driving method includes:
providing the same common voltage signal to the first electrode and the second electrode in the display stage of the touch display panel,
and in the touch control stage of the touch control display panel, providing a touch control signal for the first electrode and providing a constant voltage signal for the second electrode.
Compared with the prior art, the technical scheme has the following advantages:
according to the technical scheme provided by the embodiment of the invention, in the display stage, the second electrode and the first electrode are electrically connected to the same common voltage signal, so that when the touch display panel works in the display stage, the common voltage at the position of the touch display panel is the same, the common voltage corresponding to each pixel unit in the touch display panel is ensured to be equal, the phenomenon of uneven display of the touch display panel is relieved, and the display quality of the special-shaped touch display panel is improved.
In addition, according to the technical scheme provided by the embodiment of the invention, in the touch control stage, the second electrode is electrically connected with a constant voltage signal, so that the voltage on the first electrode is prevented from being coupled to the second electrode, the voltage on the second electrode is changed, a constant value cannot be ensured, and the touch control detection function of the special-shaped touch control display panel is prevented from being influenced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a touch electrode layer of a prior art touch display panel;
fig. 2 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a touch display panel according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a touch display panel according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a touch display panel according to still another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a touch display panel according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram of a touch display panel according to still another embodiment of the present invention;
fig. 8 is a schematic structural diagram of a touch display panel according to another embodiment of the present invention;
fig. 9 is a schematic structural diagram of a touch display panel according to still another embodiment of the present invention;
FIG. 10 is an enlarged view of a portion of FIG. 9 at area A;
fig. 11 is a schematic structural diagram of a touch display panel according to another embodiment of the present invention;
FIG. 12 is an enlarged view of a portion of FIG. 11 at the location of area A;
fig. 13 is a schematic structural diagram of a touch display panel according to still another embodiment of the present invention;
FIG. 14 is an enlarged view of a portion of FIG. 13 at area A;
fig. 15 is a cross-sectional view of a touch display panel according to an embodiment of the invention;
fig. 16 is a cross-sectional view of a touch display panel according to another embodiment of the invention;
fig. 17 is a flowchart of a driving method of a touch display panel according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As mentioned above, the irregular display technology is becoming more and more widely used, and people have higher and higher requirements for the application of irregular display panels such as circles, regular polygons, irregular shapes, and the like. However, the touch electrode layer in the conventional touch display panel is usually composed of a plurality of vertically and horizontally divided touch electrodes, and when the display area of the touch display panel is not rectangular (i.e. the display area of the touch display panel is not rectangular or square), there exists a rectangular touch electrode 01 in the block electrodes included therein, which is not regular (i.e. there exists a rectangular touch electrode 01 in the block electrodes included therein, which is not rectangular or square), as shown in fig. 1.
For those touch electrodes with shapes that are not regular rectangles, it is difficult to ensure that each touch electrode is electrically connected with the corresponding touch electrode trace, so that when the touch electrodes are reused as common electrodes of the liquid crystal display panel, the display quality of the touch display panel is affected.
The inventor has found that, in the existing touch display panel, the touch electrode traces provide the touch signal to the touch electrode in the touch stage, and provide the common voltage signal to the touch electrode in the display stage, when the liquid crystal display panel works in the display stage, for those touch electrodes (denoted as the special-shaped electrodes) whose shapes are not regular rectangles, since the special-shaped electrodes are not electrically connected to the corresponding touch electrode traces (i.e. the via holes electrically connecting the special-shaped electrodes to the corresponding touch electrode traces are not hit on the special-shaped electrodes), the common voltage signal transmitted by the corresponding touch electrode traces cannot be received, so that in the touch display panel, the voltage in the area where the special-shaped electrodes are located cannot be constant as the common voltage signal, and the common voltage corresponding to the pixel units in the area where the special-shaped electrodes are located is different from the common voltage corresponding to the pixel units in other areas, the display quality of the touch display panel is affected by the uneven display of the display picture of the touch display panel.
In view of the above, an embodiment of the present invention provides a touch display panel, as shown in fig. 2, the touch display panel includes:
the touch control display panel comprises a touch control electrode layer 10, a first electrode layer and a second electrode layer, wherein the touch control electrode layer comprises a plurality of block electrodes positioned in a touch control area of the touch control display panel, and the plurality of block electrodes comprise a first electrode 11 and a second electrode 12;
a touch routing layer 20 including a plurality of traces including a first trace 21 corresponding to the first electrode 11 and a second trace 22 corresponding to the second electrode 12; wherein,
the orthographic projection of the first wire 21 on the touch electrode layer 10 is overlapped with the corresponding first electrode 11, the first wire 21 is electrically connected with the corresponding first electrode 11 through a via hole, and the orthographic projection of the second wire 22 on the touch electrode layer 10 is not overlapped with the corresponding second electrode 12;
the touch display panel has a display stage and a touch stage, in the display stage, the first electrode 11 and the second electrode 12 are connected with the same common voltage signal, in the touch stage, the first electrode 11 is used as a touch electrode and connected with the touch signal, and the second electrode 12 is connected with a constant voltage signal.
It should be noted that, in the embodiment of the present invention, a first trace 21, corresponding to the first electrode 11, of the plurality of traces is electrically connected to the first electrode 11, and is used for providing a common voltage signal to the first electrode 11 in the display stage and providing a touch signal to the first electrode 11 in the touch stage; the second trace 22 corresponding to the second electrode 12 in the plurality of traces is used for providing a common voltage signal to the first electrode 11 in the display stage and providing a touch signal to the first electrode 11 in the touch stage when the second electrode 12 is electrically connected to the second trace 22, but since the orthographic projection of the second trace 22 on the touch electrode layer 10 is not overlapped with the second electrode 12 in the embodiment of the present invention, the second electrode 12 is not electrically connected to the corresponding second trace 22 in the embodiment of the present invention, and accordingly, the signal in the second trace 22 cannot be transmitted to the corresponding second electrode 12.
It should be further noted that, in the embodiment of the present invention, the orthographic projection of the first trace 21 on the touch electrode layer 10 is a projection of the first trace 21 on the touch electrode layer 10 along a direction perpendicular to the plane of the touch electrode layer 10; similarly, the orthographic projection of the second trace 22 on the touch electrode layer 10 is a projection of the second trace 22 on the touch electrode layer 10 along a direction perpendicular to the plane of the touch electrode layer 10.
In the touch display panel provided in the embodiment of the present invention, although the second electrode 12 is not electrically connected to the corresponding second trace 22, in the display stage, the second electrode 12 and the first electrode 11 are electrically connected to the same common voltage signal, so that when the touch display panel works in the display stage, common voltages at positions of the touch display panel are the same, the common voltages corresponding to each pixel unit in the touch display panel are ensured to be equal, the display non-uniformity of the touch display panel is alleviated, and the display quality of the touch display panel is improved.
In addition, in the touch display panel provided in the embodiment of the present invention, in the touch stage, the second electrode 12 is electrically connected to a constant voltage signal, so as to prevent the voltage on the first electrode 11 from being coupled to the second electrode 12, so that the voltage on the second electrode 12 is changed, and a constant value cannot be ensured, thereby affecting the touch detection function of the touch display panel.
On the basis of the above embodiments, in an embodiment of the present invention, the electrically connecting the first trace 21 and the corresponding first electrode 11 through a via includes: the first trace 21 is electrically connected to the corresponding first electrode 11 through a via, as shown in fig. 2; in another embodiment of the present invention, the electrically connecting the first trace 21 and the corresponding first electrode 11 through a via includes: the first trace 21 and the corresponding first electrode 11 are electrically connected through a plurality of vias, as shown in fig. 3, where the plurality of vias is at least two vias, which is not limited in the present invention, and is determined as the case may be. It should be noted that, in the embodiment of the present invention, the larger the number of the vias electrically connecting the first electrode 11 and the corresponding first trace 21 is, the smaller the resistance between the first trace 21 and the corresponding first electrode 11 is, and the shorter the time delay of the signal in the first trace 21 from being transmitted to the first electrode 11 is.
Optionally, on the basis of the above embodiment, in an embodiment of the present invention, when the first electrode 11 is electrically connected to the corresponding first trace 21 through a plurality of vias, projections of the plurality of vias on the first electrode 11 are uniformly distributed, so as to reduce a phenomenon of non-uniformity of a display screen of the touch display panel caused by non-uniform arrangement of the plurality of vias.
On the basis of any of the above embodiments, in an embodiment of the present invention, as shown in fig. 4, the touch display panel further includes:
the common wiring layer 30, the common wiring layer 30 includes a common wiring 31 located in a non-touch area of the touch display panel, the second electrode 12 is connected to a common voltage signal through the common wiring 31 in a display stage, and the second electrode 12 is connected to a constant voltage signal through the common wiring 31 in a touch stage.
Optionally, on the basis of the above embodiment, in a specific embodiment of the present invention, the voltage values of the constant voltage signal and the common voltage signal are equal, but the present invention is not limited to this, and in other embodiments of the present invention, the constant voltage signal may also be other voltage values as long as the voltage value of the constant voltage signal is ensured to be a constant value, so as to prevent the voltage signal change on the first electrode 11 from being coupled to the second electrode 12 to affect the touch detection and the image display of the touch display panel.
It should be noted that, in the embodiment of the present invention, in the touch display panel shown in fig. 2 and 3, orthographic projections of a plurality of routing lines in the touch routing layer on the touch electrode layer are only located in an area where the touch electrode layer is located, and orthographic projections of a part of routing lines on the touch electrode layer are not only located in the area where the touch electrode layer is located, but also extend to a peripheral area of the touch electrode layer; in the touch display panel shown in fig. 4, orthographic projections of the multiple traces in the touch trace layer on the touch electrode layer are all located in the area where the touch electrode layer is located, but the present invention is not limited to this, and in the specific manufacturing process, orthographic projections of the multiple traces in the touch trace layer on the touch electrode layer may all be located in the area where the touch electrode layer is located, or a part of the traces may be located only in the area where the touch electrode layer is located, and a part of the traces may be located not only in the area where the touch electrode layer is located, but also extend to the peripheral area of the touch electrode layer, or all the traces may be located not only in the area where the touch electrode layer is located, but also extend to the peripheral area of the.
It should be noted that, in the above embodiments, when the trace in the touch electrode layer is not only located in the area where the touch electrode layer is located, but also extends to the peripheral area of the touch electrode layer, either end of the trace may extend to the peripheral area of the touch electrode layer, or both ends of the trace may extend to the peripheral area of the touch electrode layer.
In order to facilitate displaying of the relative position relationship between the second electrode and the corresponding second trace, in each schematic diagram of the embodiment of the present invention, each second trace is not only located in the area where the touch electrode layer is located, but also extends from two ends to the peripheral area of the touch electrode layer, and a via hole for electrically connecting with the second electrode on each second trace is also displayed.
On the basis of the above embodiments, in an embodiment of the present invention, the common routing layer 30 and the touch routing layer 10 are disposed in different layers, so as to avoid short circuit between the common routing 31 in the common routing layer 30 and the first routing 21 and the second routing 22 in the touch routing layer 10, but the present invention is not limited thereto, and on the premise that it can be ensured that the common routing 31 in the common routing layer 30 and the first routing 21 and the second routing 22 in the touch routing layer 10 are not short-circuited, the common routing layer 30 and the touch routing layer 10 may also be disposed in the same layer, which is determined according to the circumstances.
Specifically, on the basis of the above embodiment, in an embodiment of the present invention, when the common wiring layer 30 is disposed on a different layer from the touch wiring layer 10, the common wiring 31 is electrically connected to the second electrode 12 through the via hole. It should be noted that, in the embodiment of the present invention, the common trace 31 may be electrically connected to the second electrode 12 through one via, or may be electrically connected to the second electrode 12 through a plurality of vias (at least two vias), which is not limited in the present invention, and is determined as the case may be.
It should be noted that, when the common line 31 is electrically connected to the second electrode 12 through a via, the via is preferably located at the center of the second electrode 12 to equalize the time delay of the signal on the common line 31 transmitted to each point of the second electrode 12, so as to reduce the display non-uniformity caused by the difference of the time of the signal on the common line 31 transmitted to each point of the second electrode 12. When the common trace 31 is electrically connected to the second electrode 12 through the plurality of via holes, the orthographic projections of the plurality of via holes on the second electrode 12 are uniformly distributed on the second electrode 12, so as to reduce the display unevenness caused by the time difference between the signals on the common trace 31 and the points on the second electrode 12. However, the present invention is not limited thereto, as the case may be.
On the basis of the above embodiments, in an embodiment of the present invention, an orthographic projection of the common trace 31 on the touch electrode layer 10 forms a surrounding area, and orthographic projections of the first trace 21 and the second trace 22 on the touch electrode layer 10 are located in the surrounding area, but the present invention is not limited thereto, in other embodiments of the present invention, the orthographic projection of the common trace 31 on the touch electrode layer 10 may not form a surrounding area, and/or, the orthographic projection of the common trace 31 on the touch electrode layer 10 forms a surrounding area, however, the orthographic projections of the first trace 21 and the second trace 22 on the touch electrode layer 10 are not completely located in the surrounding area, as the case may be, as long as the common trace 31 can be electrically connected to the second electrode 12, for providing the common voltage signal and the constant voltage signal to the second electrode 12, and is not short-circuited with the first wire 21 and the second wire 22.
Specifically, on the basis of the above embodiments, in an embodiment of the present invention, the projection of the common trace 31 on the plane of the touch electrode layer 10 includes an arc trace located in the peripheral area of the touch electrode layer and an electrical connection line 311 electrically connected to the arc trace, and the projection of the electrical connection line 311 on the plane of the touch electrode layer 10 extends to the area of the second electrode 12, so that the projection of the electrical connection line 311 on the plane of the touch electrode layer 10 overlaps with the second electrode 12, so that the electrical connection line 311 can be electrically connected to the second electrode 12 through a via hole, but the present invention is not limited thereto, and in other embodiments of the present invention, the common trace 31 may also be in other shapes (such as an arc, a broken line, a straight line, etc.), as long as it is ensured that the common trace 31 can be electrically connected to the second electrode 12.
It should be noted that, since the second electrode 12 is usually located at the edge region of the touch electrode layer 10, on the basis of any of the above embodiments, in an embodiment of the invention, the area of the second electrode 12 is less than 1mm2The influence of the second electrode 12 on the touch detection of the edge area of the touch display panel is reduced to the greatest extent, but the invention is not limited thereto, and is determined as the case may be.
It should be noted that, although in the drawings of the present disclosure, the touch display panel is illustrated by taking the shape of the touch electrode layer 10 as a circle as an example, the structure of the touch display panel is not limited to this, and in other embodiments of the present disclosure, the shape of the touch electrode layer 10 may also be other shapes such as a regular N-polygon (as shown in fig. 5), an irregular pattern (as shown in fig. 6), or a rectangle with rounded corners (as shown in fig. 7), as long as there is a touch electrode in the touch electrode layer 10 that is not electrically connected to its corresponding touch electrode trace (i.e., there is the second electrode 12 in the touch display panel in the present disclosure). Wherein N is not equal to 4, that is, the shape of the touch electrode layer 10 is not a regular square.
It should be further noted that, in the embodiment of the present invention, in order to conveniently display the shape of the touch electrode layer and the relative position of the touch wiring layer, only the touch electrode layer and the touch wiring layer are shown in fig. 5 to 7, and the common wiring layer is not shown, but in actual manufacturing, no matter what the shape of the touch electrode layer is, the second electrode can be electrically connected to the second electrode through the common wiring in the common wiring layer.
Next, the touch display panel provided by the embodiment of the invention is described by taking the shape of the touch electrode layer as a circle as an example.
As shown in fig. 2, in the embodiment of the present invention, the plurality of block electrodes are arranged in an array, that is, the plurality of block electrodes are divided into a plurality of columns of block electrodes, and each column of block electrodes includes at least two block electrodes; the plurality of routing lines extend along a first direction X and are arranged along a second direction Y, wherein the second direction Y is perpendicular to the first direction X.
Specifically, on the basis of the above embodiment, in an embodiment of the present invention, in the same column of block-shaped electrodes, the block-shaped electrodes are sequentially arranged along a first direction, the routing lines corresponding to the block-shaped electrodes are sequentially arranged along a second direction, and in a direction perpendicular to the touch display panel, at least one first electrode 11 in the column is overlapped with the routing lines corresponding to the block-shaped electrodes, so that the orthographic projections of the routing lines corresponding to the column of block-shaped electrodes on the touch electrode layer are all located in the area where the column of block-shaped electrodes is located, and do not overlap with other columns of block-shaped electrodes.
Specifically, on the basis of the above embodiments, in an embodiment of the invention, as shown in fig. 2, the first direction X is opposite to the transmission direction of the signal in the first trace 21, and the second direction Y is perpendicular to the first direction X and points to the right end of the touch display panel from the left end of the touch display panel. In the embodiment of the present invention, the second electrodes 12 are located at the upper left and lower right of the touch electrode layer, as shown by the dashed box area B in fig. 2.
In another embodiment of the invention, as shown in fig. 8, the first direction X is opposite to the transmission direction of the signal in the first trace 21, and the second direction Y is perpendicular to the first direction X and points to the left end of the touch display panel from the right end of the touch display panel. In the embodiment of the present invention, the second electrodes 12 are located at the lower left and upper right of the touch electrode layer, as shown by the dashed box area C in fig. 8. However, the present invention is not limited to this, and in other embodiments of the present invention, the second electrode may be located at other positions of the touch electrode layer, which depends on the shape of the touch electrode layer, the punching direction, and the like.
It should be noted that, in the above embodiment, since the second trace 22 is not electrically connected to the second electrode 12, when two ends of the second trace 22 are suspended, the voltage signal on the first trace 21 is coupled to the second trace 22, so as to generate a certain voltage change, thereby affecting the touch detection of the area where the second trace 22 is located. Therefore, on the basis of the above embodiments, in an embodiment of the present invention, in the display stage, the second trace 22 is electrically connected to the common voltage signal, and in the touch stage, the second trace 22 is electrically connected to the constant voltage signal, so as to ensure that the voltage on the second trace 22 is a constant value no matter in the display stage or in the touch stage, and will not change due to the coupling effect between the first trace 21 and the second trace 22, thereby improving the touch detection accuracy of the area where the second trace 22 is located.
In another embodiment of the invention, in the display stage, the second trace 22 is electrically connected to the common voltage signal, and in the touch stage, the second trace 22 is electrically connected to the touch signal, so that the voltage on the second trace 22 is synchronous with the voltage on the first trace 21, thereby preventing the voltage on the second trace 22 from changing due to the coupling effect between the first trace 21 and the second trace 22, and improving the touch detection accuracy of the touch display panel.
In another embodiment of the present invention, as shown in fig. 9 and fig. 10, wherein fig. 10 is a partially enlarged view of the location of the area a in fig. 9, in the embodiment of the present invention, the second trace 22 includes a plurality of first sub-traces 221, any two adjacent first sub-traces 221 in the plurality of first sub-traces 221 are insulated from each other, an orthographic projection of any one of the first sub-traces 221 on the touch electrode layer 10 is overlapped with only one first electrode 11, and the first sub-trace 221 is electrically connected to the first electrode 11 through a via hole, so that each first sub-trace 221 in the second trace 22 is electrically connected to the first electrode 11 directly below the first sub-trace 221, thereby preventing the voltage on the second trace 22 from being changed due to the coupling effect between the first trace 21 and the second trace 22, and improving the touch detection trace accuracy of the touch display panel.
On the basis of any of the above embodiments, in an embodiment of the present invention, as shown in fig. 11 and 12, where fig. 12 is a partially enlarged view of a position of a region a in fig. 11, the plurality of traces further includes a third trace 23, and the third trace 23 does not correspond to the block electrode. In the embodiment of the present invention, in the same column of block-shaped electrodes, in the direction perpendicular to the touch display panel, the sum of the numbers of the first trace 21, the second trace 22, and the third trace 23 overlapped with at least one first electrode 11 in the column is a; the maximum value of the number of the block electrodes contained in each row of the block electrodes of the touch display panel is b, namely the number of the block electrodes contained in the row of the block electrodes with the largest number of the block electrodes in the touch display panel is b; the number of the traces directly above each row of the block electrodes in the touch display panel is the same, so that the influence of the plurality of traces on each row of the block electrodes in the touch trace layer 20 is the same, and the uniformity of the display image of the touch display panel is improved.
On the basis of the above embodiments, in an embodiment of the present invention, in the display stage, the third trace 23 is electrically connected to the common voltage signal, and in the touch stage, the third trace 23 is electrically connected to the constant voltage signal, so as to ensure that the voltage on the third trace 23 is a constant value no matter in the display stage or in the touch stage, and will not change due to the coupling effect between the third trace 23 and the second trace 22, thereby improving the touch detection accuracy of the area where the third trace 23 is located. Optionally, in the display stage, the second trace 22 is electrically connected to the common voltage signal, the third trace 23 is electrically connected to the common voltage signal, in the touch stage, the second trace 22 is electrically connected to the constant voltage signal, and when the third trace 23 is electrically connected to the constant voltage signal, the voltage on the third trace 23 is the same as the voltage on the second trace 22.
In another embodiment of the present invention, when the voltage signal on the third trace 23 is not a constant value in the display stage, and/or when the voltage signal on the third trace 23 is not a constant value in the touch stage, the voltage on the third trace 23 is the same as the voltage signal on the second trace 22, so as to avoid the voltage on the third trace 23 from changing due to the coupling effect between the third trace 23 and the second trace 22, and improve the touch detection accuracy of the area where the third trace 23 is located.
Specifically, on the basis of the above embodiments, in an embodiment of the present invention, in the display stage, the second trace 22 and the third trace 23 are connected to a common voltage signal, and in the touch stage, the second trace 22 and the third trace 23 are connected to a touch signal, so that the voltage on the third trace 23 is synchronous and the same as the voltage on the second trace 22, thereby preventing the voltage on the third trace 23 from changing due to the coupling effect between the third trace 23 and the second trace 22, and improving the touch detection accuracy of the touch display panel.
In yet another embodiment of the present invention, as shown in fig. 13 and fig. 14, wherein fig. 14 is a partially enlarged view of the position of the area a in fig. 13, in an embodiment of the present invention, the second trace 22 includes a plurality of first sub-traces 221, any two adjacent first sub-traces 221 in the plurality of first sub-traces 221 are insulated from each other, an orthogonal projection of any one first sub-trace 221 in the plurality of first sub-traces 221 on the touch electrode layer 10 is overlapped with only one first electrode 11, and the first sub-trace 221 is electrically connected to the first electrode 11 through a via; the third trace 23 includes a plurality of second sub-traces 231, any two adjacent second sub-traces 231 in the plurality of second sub-traces 231 are insulated from each other, an orthographic projection of any one second sub-trace 231 in the plurality of second sub-traces 231 on the touch electrode layer 10 is overlapped with only one first electrode 11, and the second sub-trace 231 is electrically connected to the first electrode 11 through a via hole, so that each first sub-trace 221 in the second trace 22 is electrically connected to the first electrode 11 directly below the first sub-trace, each second sub-trace 231 in the third trace 23 is also electrically connected to the first electrode 11 directly below the first sub-trace, that is, the first sub-trace 221 and the second sub-trace 231 located right above the same first electrode 11 are electrically connected to the same first electrode 11, so as to prevent the voltage on the third trace 23 from changing due to the coupling effect between the third trace 23 and the second trace 22, and improve the touch detection accuracy of the touch display panel.
On the basis of any of the above embodiments, in an embodiment of the present invention, the touch display panel is a liquid crystal display panel, as shown in fig. 15, the liquid crystal display panel includes: the liquid crystal display panel comprises a first substrate 40 and a second substrate 50 which are arranged oppositely, a liquid crystal layer 60 which is positioned between the first substrate 40 and the second substrate 50, a pixel electrode layer 70 which is positioned on one side of the first substrate 40 facing the liquid crystal layer 60, and a touch electrode layer 10 which is positioned on one side of the second substrate 50 facing the liquid crystal layer 60, wherein the touch electrode 10 is a common electrode layer which is multiplexed as a liquid crystal display panel so as to reduce the thickness of the touch display panel and be beneficial to the development of thinning the touch display panel.
It should be noted that, although the touch display panel shown In fig. 15 is a TN (Twisted Nematic) liquid crystal display panel, the present invention is not limited thereto, and In other embodiments of the present invention, the touch display panel may also be an IPS (In-Plane Switching) liquid crystal display panel or an FFS (fringe field Switching) liquid crystal display panel, and when the touch display panel is an IPS liquid crystal display panel or an FFS liquid crystal display panel, the touch electrode layer 10 and the pixel electrode layer 70 are located on the same side of the liquid crystal layer 60, as the case may be.
In another embodiment of the present invention, the touch display panel is an organic light emitting diode display panel, as shown in fig. 16, the organic light emitting diode display panel includes: a third substrate 80 and a fourth substrate 90 disposed opposite to each other; a light emitting layer 100 between the third substrate 80 and the fourth substrate 90, the light emitting layer 100 including red, green and blue light emitting cells R, G and B arranged in a cycle; an anode layer 110 on the third substrate 80 facing the light-emitting layer 100; the touch electrode layer 10 is located on one side of the fourth substrate 90 facing the light emitting layer 100, wherein the touch electrode layer 10 is used as a cathode layer of the organic light emitting diode display panel, so as to reduce the thickness of the touch display panel, which is beneficial to the development of the touch display panel.
It should be noted that, although the touch display panel shown in fig. 16 is a rigid organic light emitting diode display panel, that is, the touch display panel includes the fourth substrate 90 located on the side of the touch electrode layer 10 away from the light emitting layer 100, the present invention is not limited thereto, and in other embodiments of the present invention, the touch display panel may also be a flexible organic light emitting diode display panel, that is, the touch display panel does not include the fourth substrate 90 located on the side of the touch electrode layer 10 away from the light emitting layer 100, but encapsulates the structure formed by the third substrate 80, the anode layer 110, the light emitting layer 90 and the touch electrode layer 10 by using a thin film, as the case may be.
Correspondingly, the embodiment of the invention also provides a touch display device comprising the touch display panel provided by any one of the embodiments. Specifically, the touch display device includes the touch display panel and the driving circuit provided in any of the above embodiments, wherein the touch display panel includes: the touch control display panel comprises a touch control electrode layer, a first electrode and a second electrode, wherein the touch control electrode layer comprises a plurality of block electrodes positioned in a touch control area of the touch control display panel; the touch control wiring layer comprises a plurality of wirings, and the plurality of wirings comprise first wirings corresponding to the first electrodes and second wirings corresponding to the second electrodes, wherein the orthographic projection of the first wirings on the touch control electrode layer is overlapped with the first electrodes corresponding to the first wirings, the first wirings are electrically connected with the first electrodes corresponding to the first wirings through via holes, and the orthographic projection of the second wirings on the touch control electrode layer is not overlapped with the second electrodes corresponding to the second wirings;
the driving circuit is used for providing the same common voltage signal for the first electrode and the second electrode in the display stage of the touch display panel, and providing the touch signal for the first electrode and the constant voltage signal for the second electrode in the touch stage of the touch display panel.
It should be further noted that the touch display device provided in the embodiment of the present application may be a rigid or flexible liquid crystal panel, and may also be various types of display panels such as an OLED panel, a micro LED, or a QLED, which is not limited in the present application. The touch display device provided in the embodiment of the application may also be any display product or component with a touch function, such as a flat, flexible, foldable, rollable, and other flexible or rigid television, a desktop display, a notebook computer, a tablet computer, an electrophoretic display, an in-vehicle display, a digital photo frame, a navigator, an industrial control display, a mobile phone, a digital camera, a watch, a bracelet, smart glasses, electronic paper, and the like, including but not limited to the above terminal display device.
In summary, in the touch display panel and the touch display device including the touch display panel provided in the embodiments of the present invention, in the display stage, the second electrode and the first electrode are electrically connected to the same common voltage signal, so that when the touch display panel works in the display stage, common voltages at positions of the touch display panel are the same, the common voltages corresponding to pixel units in the touch display panel are ensured to be equal, the display unevenness of the touch display panel is alleviated, and the display quality of the touch display panel is improved.
In addition, in the touch display panel provided in the embodiment of the present invention, in the touch stage, the second electrode 12 is electrically connected to a constant voltage signal, so as to prevent the voltage on the first electrode 11 from being coupled to the second electrode 12, so that the voltage on the second electrode 12 is changed, and a constant value cannot be ensured, thereby affecting the touch detection function of the touch display panel.
In addition, an embodiment of the present invention further provides a driving method of a touch display panel, where the touch display panel is the touch display panel provided in any one of the embodiments. Specifically, in an embodiment of the present invention, the touch electrode layer includes a plurality of block electrodes located in a touch area of the touch display panel, and the plurality of block electrodes includes a first electrode and a second electrode;
a touch wiring layer including a plurality of wirings including a first wiring corresponding to the first electrode and a second wiring corresponding to the second electrode, wherein,
the orthographic projection of the first wires on the touch electrode layer is overlapped with the corresponding first electrodes, the first wires are electrically connected with the corresponding first electrodes through via holes, and the orthographic projection of the second wires on the touch electrode layer is not overlapped with the corresponding second electrodes; as shown in fig. 17, the driving method includes:
s1: in the display stage of the touch display panel, the same common voltage signal is provided for the first electrode and the second electrode;
s2: in the touch control stage of the touch control display panel, a touch control signal is provided for the first electrode, and a constant voltage signal is provided for the second electrode.
In the driving method of the touch display panel provided by the embodiment of the invention, the same common voltage signal is provided for the second electrode and the first electrode in the display stage, so that when the touch display panel works in the display stage, the common voltage at the position of the touch display panel is the same, the common voltage corresponding to each pixel unit in the touch display panel is ensured to be equal, the phenomenon of uneven display of the touch display panel is relieved, and the display quality of the touch display panel is improved.
In addition, in the driving method of the touch display panel provided by the embodiment of the invention, a constant voltage signal is provided to the second electrode in the touch stage, so that the voltage on the first electrode is prevented from being coupled to the second electrode, and the voltage on the second electrode is prevented from changing, so that the constant value cannot be ensured, and the touch detection function of the touch display panel is prevented from being influenced.
On the basis of the above embodiment, in one embodiment of the present invention, a plurality of block electrodes are arranged in an array; the plurality of wires extend along a first direction and are distributed along a second direction, and the second direction is vertical to the first direction; the plurality of wires further comprise third wires, and the third wires do not correspond to the block electrodes; in the same row of the blocky electrodes, in the direction perpendicular to the touch display panel, the sum of the number of first routing lines, second routing lines and third routing lines overlapped with at least one first electrode in the row is a; the maximum value of the number of the block electrodes contained in each row of the block electrodes of the touch display panel is b; wherein a ═ b. In one embodiment of the invention, the method further comprises: in the display stage, a common voltage signal is provided for the second wire and the third wire, and in the touch control stage, a constant voltage signal is provided for the second wire and the third wire, so that the voltages on the second wire and the third wire are fixed values, and the touch control detection precision of the touch control display panel cannot be influenced due to the change of the coupling capacitance. In another embodiment of the present invention, the method further comprises: and in the touch control stage, the common voltage signal is provided for the second wire and the third wire, so that the voltages on the third wire and the second wire are synchronous and same with the voltage on the first wire, the voltages on the third wire and the second wire are prevented from changing due to the effect of the coupling capacitor, and the touch control detection precision of the touch control display panel is improved.
In summary, in the driving method of the touch display panel provided in the embodiment of the present invention, the same common voltage signal is provided to the second electrode and the first electrode in the display stage, so that when the touch display panel works in the display stage, the common voltages at the positions of the touch display panel are the same, the common voltages corresponding to the pixel units in the touch display panel are ensured to be equal, the display non-uniformity of the touch display panel is alleviated, and the display quality of the touch display panel is improved.
In addition, in the driving method of the touch display panel provided by the embodiment of the invention, a constant voltage signal is provided to the second electrode in the touch stage, so that the voltage on the first electrode is prevented from being coupled to the second electrode, and the voltage on the second electrode is prevented from changing, so that the constant value cannot be ensured, and the touch detection function of the touch display panel is prevented from being influenced.
In the description, each part is described in a progressive manner, each part is emphasized to be different from other parts, and the same and similar parts among the parts are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (16)
1. A touch display panel, comprising:
the touch control electrode layer comprises a plurality of block electrodes positioned in a touch control area of the touch control display panel, and the plurality of block electrodes comprise a first electrode and a second electrode;
a touch routing layer including a plurality of traces including a first trace corresponding to the first electrode and a second trace corresponding to the second electrode, wherein,
the orthographic projection of the first wires on the touch electrode layer is overlapped with the corresponding first electrodes, the first wires are electrically connected with the corresponding first electrodes through via holes, and the orthographic projection of the second wires on the touch electrode layer is not overlapped with the corresponding second electrodes;
the touch display panel is provided with a display stage and a touch stage, the first electrode and the second electrode are connected with the same common voltage signal in the display stage, the first electrode is used as a touch electrode and connected with a touch signal in the touch stage, and the second electrode is connected with a constant voltage signal.
2. The touch display panel according to claim 1, further comprising:
the common wiring layer comprises a common wiring located in a non-touch area of the touch display panel, the second electrode is connected with the common voltage signal through the common wiring in the display stage, and the second electrode is connected with the constant voltage signal through the common wiring in the touch stage.
3. The touch display panel of claim 2, wherein the common routing layer is disposed at a different layer than the touch routing layer.
4. The touch display panel according to claim 2, wherein an orthographic projection of the common trace on the touch electrode layer forms a surrounding area, and an orthographic projection of the first trace and the second trace on the touch electrode layer is located in the surrounding area.
5. The touch display panel of claim 1, wherein the area of the second electrode is less than 1mm2。
6. The touch display panel according to claim 1, wherein the touch electrode layer has a circular shape, a regular N-sided shape, an irregular shape, or a rectangular shape with rounded corners.
7. The touch display panel according to claim 6, wherein the plurality of block electrodes are arranged in an array;
the plurality of traces extend along a first direction and are arranged along a second direction,
the second direction is perpendicular to the first direction.
8. The touch display panel according to claim 7, wherein in the same column of the block electrodes, the block electrodes are sequentially arranged along a first direction, the routing lines corresponding to the block electrodes are sequentially arranged along a second direction, and in a direction perpendicular to the touch display panel, at least one first electrode in the column overlaps with each routing line corresponding to each block electrode.
9. The touch display panel according to claim 8, wherein the plurality of traces further includes a third trace, and the third trace does not correspond to the block electrode;
in the same column of the block-shaped electrodes, in the direction perpendicular to the touch display panel, the sum of the number of the first routing lines, the number of the second routing lines and the number of the third routing lines overlapped with at least one first electrode in the column is a;
the maximum value of the number of the block electrodes contained in each column of the block electrodes of the touch display panel is b; wherein,
a＝b。
10. the touch display panel of claim 9,
in the display stage, the second wire and the third wire are connected with the common voltage signal, and in the touch control stage, the second wire and the third wire are connected with the constant voltage signal.
11. The touch display panel of claim 9,
in the display stage, the second trace and the third trace are connected to the common voltage signal, and in the touch control stage, the second trace and the third trace are connected to the touch control signal.
12. The touch display panel of claim 9,
the second wire comprises a plurality of first sub-wires, any two adjacent first sub-wires in the plurality of first sub-wires are insulated from each other, the orthographic projection of any one first sub-wire in the plurality of first sub-wires on the touch electrode layer is only overlapped with one first electrode, and the first sub-wire is electrically connected with the first electrode through a through hole;
the third wire comprises a plurality of second sub-wires, any two adjacent second sub-wires in the plurality of second sub-wires are insulated from each other, the orthographic projection of any one second sub-wire in the plurality of second sub-wires on the touch electrode layer is only overlapped with one first electrode, and the second sub-wire is electrically connected with the first electrode through a through hole.
13. The touch display panel according to claim 1, wherein the touch display panel is a liquid crystal display panel, and the touch electrode layer is a common electrode layer of the liquid crystal display panel.
14. The touch display panel according to claim 1, wherein the touch display panel is an organic light emitting diode display panel, and the touch electrode layer is a cathode layer of the organic light emitting diode display panel.
15. A touch display device, comprising: the touch display panel of any one of claims 1-14.
16. A driving method of a touch display panel, the touch display panel comprising:
the touch control electrode layer comprises a plurality of block electrodes positioned in a touch control area of the touch control display panel, and the plurality of block electrodes comprise a first electrode and a second electrode;
a touch routing layer including a plurality of traces including a first trace corresponding to the first electrode and a second trace corresponding to the second electrode, wherein,
the orthographic projection of the first wires on the touch electrode layer is overlapped with the corresponding first electrodes, the first wires are electrically connected with the corresponding first electrodes through via holes, and the orthographic projection of the second wires on the touch electrode layer is not overlapped with the corresponding second electrodes;
the driving method includes:
providing the same common voltage signal to the first electrode and the second electrode in the display stage of the touch display panel,
and in the touch control stage of the touch control display panel, providing a touch control signal for the first electrode and providing a constant voltage signal for the second electrode.
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