CN112269492B - Touch display device, touch display panel and driving method of touch display panel - Google Patents
Touch display device, touch display panel and driving method of touch display panel Download PDFInfo
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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
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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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
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
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Abstract
The invention provides a touch display device, a touch display panel and a driving method thereof, wherein the front projection of a first touch driving electrode at least partially overlaps with the front projection of at least one first data line on a plane where the touch display panel is positioned, the front projection of a second touch driving electrode at least partially overlaps with the front projection of at least one second data line, in a first period, a data signal is input to the first data line, a touch driving signal is input to the second touch driving electrode, the touch driving signal is not input to the first touch driving electrode, so that the influence of potential change on the first touch driving electrode caused by the potential change on the first data line is avoided or reduced, in a second period, the data signal is input to the second data line, the touch driving signal is not input to the first touch driving electrode, and the influence of potential change on the second touch driving electrode is avoided or reduced.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a touch display device, a touch display panel, and a driving method thereof.
Background
In the field of display technology, in order to achieve thinning and light weight of display panels, more and more products integrate display and touch control onto the same panel. However, this may cause the touch driving signal to be easily affected by the display signal, resulting in poor touch performance of the display panel.
Disclosure of Invention
In view of the above, the present invention provides a touch display device, a touch display panel and a driving method thereof, so as to improve the touch performance of the touch display panel.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a touch display panel comprises a plurality of first data lines, a plurality of second data lines, a plurality of first touch drive electrodes, a plurality of second touch drive electrodes, a plurality of pixel units arranged in an array and a drive circuit;
on a plane where the touch display panel is located, the front projection of each first touch driving electrode at least partially overlaps with the front projection of at least one first data line, the front projection of each second touch driving electrode at least partially overlaps with the front projection of at least one second data line, and each column of pixel units is electrically connected with the first data line or the second data line;
The driving circuit is used for inputting data signals to the first data line, inputting touch driving signals to the second touch driving electrode in a first period, inputting data signals to the second data line and inputting touch driving signals to the first touch driving electrode in a second period;
the charging time of the frame data signal of the touch display panel at least comprises the first period and the second period, and the first period and the second period are not overlapped.
The driving method of a touch display panel, the touch display panel includes a plurality of first data lines, a plurality of second data lines, a plurality of first touch driving electrodes, a plurality of second touch driving electrodes and a plurality of pixel units arranged in an array, each of the first touch driving electrodes is correspondingly arranged with at least one of the first data lines, each of the second touch driving electrodes is correspondingly arranged with at least one of the second data lines, each column of pixel units is connected with the first data lines or the second data lines, the driving method includes:
a first period in which a data signal is input to the first data line and a touch driving signal is input to the second touch driving electrode;
A second period of time in which a data signal is input to the second data line and a touch driving signal is input to the first touch driving electrode;
the charging time of the frame data signal of the touch display panel at least comprises the first period and the second period, and the first period and the second period are not overlapped.
A touch display device comprising the touch display panel of any one of the above.
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
according to the touch display device, the touch display panel and the driving method thereof, the front projection of each first touch driving electrode at least partially overlaps with the front projection of at least one first data line on the plane of the touch display panel, and the front projection of each second touch driving electrode at least partially overlaps with the front projection of at least one second data line, so that in a first period, a data signal is input to the first data line, a touch driving signal is input to the second touch driving electrode, the touch driving signal is not input to the first touch driving electrode, the influence of potential change on the first touch driving electrode caused by the potential change on the first data line can be avoided or reduced, in a second period, the data signal is input to the second data line, the touch driving signal is not input to the first touch driving electrode, the influence of potential change on the second touch driving electrode caused by the potential change on the second touch driving electrode can be avoided or reduced, and the touch performance of the touch display panel can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic top view of a touch display panel according to an embodiment of the invention;
fig. 2 is a schematic cross-sectional view of the touch display panel shown in fig. 1 along a cutting line AA';
fig. 3 is a signal timing diagram of a touch display panel according to an embodiment of the invention;
fig. 4 is a schematic top view of a touch display panel according to another embodiment of the invention;
fig. 5 is a signal timing diagram of a touch display panel according to another embodiment of the invention;
fig. 6 is a schematic cross-sectional view of a touch display panel according to another embodiment of the invention;
fig. 7 is a schematic top view of a touch display panel according to another embodiment of the invention;
fig. 8 is a schematic top view of a touch display panel according to another embodiment of the invention;
Fig. 9 is a schematic top view of a touch display panel according to another embodiment of the invention;
fig. 10 is a schematic top view of a touch display panel according to another embodiment of the invention;
FIG. 11 is a signal timing diagram of a touch display panel according to another embodiment of the present invention;
fig. 12 is a signal timing diagram of a touch display panel according to another embodiment of the invention;
fig. 13 is a schematic top view of a touch sensing electrode according to an embodiment of the invention;
fig. 14 is a schematic top view of a touch sensing electrode according to another embodiment of the invention;
fig. 15 is a schematic cross-sectional view of a touch display panel according to another embodiment of the invention;
fig. 16 is a schematic top view of a touch display panel according to another embodiment of the invention;
fig. 17 is a schematic structural diagram of a touch display device according to an embodiment of the present invention;
fig. 18 is a flowchart of a driving method of a touch display panel according to an embodiment of the invention.
Detailed Description
As in the background art, integrating display and touch on the same panel may result in touch signals being susceptible to display signals. The inventor researches find that the reason for the problem is mainly that the cathode of the pixel unit is close to the touch driving electrode, and the potential change on the cathode can influence the touch driving signal on the touch driving electrode, so that the touch performance is poor. One cause of the potential change on the cathode is a potential change on the data line, and one cause of the potential change on the data line is a data signal input to the data line. That is, the inventors have studied and found that inputting a data signal onto a data line causes a touch driving signal on a touch driving electrode disposed adjacent thereto to fluctuate, affecting touch performance.
Based on the above, the present invention provides a touch display panel to overcome the above problems in the prior art, including a plurality of first data lines, a plurality of second data lines, a plurality of first touch driving electrodes, a plurality of second touch driving electrodes, a plurality of pixel units arranged in an array, and a driving circuit;
on the plane of the touch display panel, the front projection of each first touch driving electrode at least partially overlaps with the front projection of at least one first data line, the front projection of each second touch driving electrode at least partially overlaps with the front projection of at least one second data line, and each column of pixel units is electrically connected with the first data line or the second data line;
the driving circuit is used for inputting data signals to the first data line, inputting touch driving signals to the second touch driving electrode in a first period, inputting data signals to the second data line, and inputting touch driving signals to the first touch driving electrode in a second period;
the charging time of the frame data signal of the touch display panel at least comprises a first period and a second period, and the first period and the second period are not overlapped.
Because the data signals are input to the first data line and the touch control driving signals are input to the second touch control driving electrode in the first period, the touch control driving signals are not input to the first touch control driving electrode, and therefore the influence of potential change on the first data line on the signals on the first touch control driving electrode can be avoided or reduced; because the data signals are input to the second data lines and the touch driving signals are input to the first touch driving electrodes in the second period, the touch driving signals are not input to the second touch driving electrodes, and therefore the influence of potential changes on the second data lines on the signals on the second touch driving electrodes can be avoided or reduced, and the touch performance of the touch display panel can be improved.
The foregoing is a core idea of the present invention, and in order that the above-mentioned objects, features and advantages of the present invention can be more clearly understood, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a touch display panel, as shown in fig. 1, fig. 1 is a schematic top view structure of the touch display panel provided by the embodiment of the invention, the touch display panel includes a plurality of first data lines D1, a plurality of second data lines D2, a plurality of first touch driving electrodes C1, a plurality of second touch driving electrodes C2, a plurality of pixel units 10 arranged in an array, and a driving circuit 11, wherein each column of pixel units 10 is electrically connected with the first data lines D1 or the second data lines D2, and of course, the touch display panel in the embodiment of the invention further includes a plurality of scanning lines G, a gate driving circuit, and the like, which are not described herein again.
In the embodiment of the present invention, as shown in fig. 1 and 2, fig. 2 is a schematic cross-sectional structure of the touch display panel shown in fig. 1 along a cutting line AA', and on a plane of the touch display panel, i.e., an XY plane, the front projection of each first touch driving electrode C1 at least partially overlaps with the front projection of at least one first data line D1, and the front projection of each second touch driving electrode C2 at least partially overlaps with the front projection of at least one second data line D2.
That is, in the direction perpendicular to the plane of the touch display panel, i.e. the Z direction, the front projection of each first touch driving electrode C1 at least partially covers the front projection of at least one first data line D1, and the front projection of each second touch driving electrode C2 at least partially covers the front projection of at least one second data line D2.
In the embodiment of the present invention, as shown in fig. 3, fig. 3 is a signal timing diagram of a touch display panel according to an embodiment of the present invention, the driving circuit 11 is configured to input a data signal to the first data line D1 in a first period T1, input a touch driving signal to the second touch driving electrode C2, input a data signal to the second data line D2 in a second period T2, and input a touch driving signal to the first touch driving electrode C1.
The charging time T of a frame data signal of the touch display panel at least comprises a first period T1 and a second period T2, and the first period T1 and the second period T2 do not overlap. It should be noted that the charging time T of one frame data signal is 1/n frame time, and n is the number of scan lines G. In one frame time, the gate driving circuit sequentially inputs scanning signals to the scanning lines G to scan the pixel unit array line by line.
Because the front projection of each first touch driving electrode C1 at least partially overlaps with the front projection of at least one first data line D1 on the plane where the touch display panel is located, i.e., the XY plane, i.e., the first data line D1 is closer to the first touch driving electrode C1 and farther from the second touch driving electrode C2, the influence of the potential change on the first data line D1 on the signal on the first touch driving electrode C1 is greater, and therefore, in the first period T1, the data signal is input to the first data line D1, the touch driving signal is input to the second touch driving electrode C2, and the touch driving signal is not input to the first touch driving electrode C1, i.e., when the potential change on the first data line D1 occurs, the signal is not input to the first touch driving electrode C1, so that the influence of the potential change on the first data line D1 on the signal on the first touch driving electrode C1 can be avoided or reduced.
Because the orthographic projection of each second touch driving electrode C2 at least partially overlaps with the orthographic projection of at least one second data line D2 on the plane where the touch display panel is located, i.e., the second data line D2 is closer to the second touch driving electrode C2 and farther from the first touch driving electrode C1, the influence of the potential change on the second data line D2 on the second touch driving electrode C2 is larger, and therefore, in the second period T2, the data signal is input to the second data line D2, the touch driving signal is not input to the first touch driving electrode C1, i.e., when the potential change on the second data line D2 occurs, the signal is not input to the second touch driving electrode C2, so that the influence of the potential change on the second data line D2 on the signal on the second touch driving electrode C2 can be avoided or reduced.
In the structure shown in fig. 1, in the first period T1, the driving circuit 11 inputs data signals to all the first data lines D1 at the same time, inputs touch driving signals to all the second touch driving electrodes C2 at the same time, and in the second period T2, the driving circuit 11 inputs data signals to all the second data lines D2 at the same time, and inputs touch driving signals to all the first touch driving electrodes C1 at the same time.
In addition, in the structure shown in fig. 1, only the alternate arrangement of one first data line D1 and one second data line D2 is taken as an example, the present invention is not limited thereto, and in other embodiments, the plurality of first data lines D1 and the plurality of second data lines D2 may be alternately arranged, and the front projection of each first touch driving electrode C1 at least partially overlaps the front projection of the plurality of first data lines D1 and the front projection of each second touch driving electrode C2 at least partially overlaps the front projection of the plurality of second data lines D2 on the XY plane, which is the plane of the touch display panel.
As shown in fig. 4, fig. 4 is a schematic top view structure of a touch display panel according to another embodiment of the present invention, three first data lines D1 and three second data lines D2 are alternately arranged, and on a plane of the touch display panel, i.e., an XY plane, front projections of each first touch driving electrode C1 at least partially overlap with front projections of the three first data lines D1, and front projections of each second touch driving electrode C2 at least partially overlap with front projections of the three second data lines D2.
Of course, the present invention is not limited to this, and in other embodiments, two first data lines D1 and two second data lines D2 may be alternately arranged, and four first data lines D1 and four second data lines D2 may be alternately arranged, which will not be described herein. It should be noted that, the number of the first data lines D1 and the second data lines D2 alternately arranged is the same as the number of the orthographic projections of the first touch driving electrode C1 at least partially overlapping with the orthographic projections of the first data lines D1 and the number of the orthographic projections of the second touch driving electrode C2 at least partially overlapping with the orthographic projections of the second data lines D2.
It should be further noted that, when the front projection of each first touch driving electrode C1 at least partially overlaps the front projections of the plurality of first data lines D1, and the front projection of each second touch driving electrode C2 at least partially overlaps the front projections of the plurality of second data lines D2, the driving circuit 11 is further configured to sequentially input data signals to the plurality of first data lines D1 during the first period T1, and sequentially input data signals to the plurality of second data lines D2 during the second period T2.
As shown in fig. 4 and 5, fig. 5 is a signal timing diagram of a touch display panel according to another embodiment of the present invention, where a plurality of first data lines D1 at least partially overlapped with the orthographic projection of the first touch driving electrode C1 include a first data line D11, a second first data line D12 and a third first data line D13, a plurality of second data lines D2 at least partially overlapped with the orthographic projection of the second touch driving electrode C2 include a first second data line D21, a second data line D22 and a third second data line D23, and then in a first period T1, data signals are sequentially input to the first data lines D11, D12 and D13, and in a second period T2, data signals are sequentially input to the second data lines D21, D22 and D23.
In some embodiments of the present invention, as shown in fig. 1 and 2, the front projection of each first touch driving electrode C1 overlaps with the front projection of one first data line D1, and the front projection of each second touch driving electrode C2 overlaps with the front projection of one second data line D2. Specifically, in the X direction, the front projection of the first touch driving electrode C1 completely overlaps with the front projection of one first data line D1, and in the Y direction, the front projection of the first touch driving electrode C1 partially overlaps with the front projection of one first data line D1; in the X direction, the orthographic projection of the second touch driving electrode C2 completely overlaps with the orthographic projection of one second data line D2, and in the Y direction, the orthographic projection of the second touch driving electrode C2 partially overlaps with the orthographic projection of one second data line D2.
Of course, the present invention is not limited thereto, and in other embodiments, as shown in fig. 6, fig. 6 is a schematic cross-sectional structure of a touch display panel according to another embodiment of the present invention, in the X direction, the front projection of the first touch driving electrode C1 may also overlap with the front projection portion of the first data line D1, that is, the front projection portion of the first touch driving electrode C1 covers the front projection of the first data line D1, and the front projection of the second touch driving electrode C2 may also overlap with the front projection portion of the second data line D2, that is, the front projection portion of the second touch driving electrode C2 covers the front projection of the second data line D2.
Of course, in other embodiments, in the X direction, the front projection of the first touch driving electrode C1 may also at least partially overlap with the front projections of the plurality of first data lines D1, and the front projection of the second touch driving electrode C2 may also at least partially overlap with the front projections of the plurality of second data lines D2, which will not be described herein.
In some embodiments of the present invention, as shown in fig. 1, the first touch driving electrode C1 and the second touch driving electrode C2 are comb-shaped electrodes, i.e. the first touch driving electrode C1 includes a plurality of strip-shaped first electrodes C11, and the second touch driving electrode C2 includes a plurality of strip-shaped second electrodes C21. The first electrodes C11 and the second electrodes C21 extend along the first direction Y, and the first electrodes C11 and the second electrodes C21 are alternately arranged in the second direction X such that the front projection of the first touch driving electrode C1 at least partially overlaps the front projection of the at least one first data line D1 and the front projection of the second touch driving electrode C2 at least partially overlaps the front projection of the at least one second data line D2 while improving touch accuracy.
It should be noted that, in the embodiment of the present invention, only the first touch driving electrode C1 and the second touch driving electrode C2 are illustrated as comb-tooth-shaped electrodes, and not limited thereto, in other embodiments, the first touch driving electrode C1 and the second touch driving electrode C2 may also be electrodes with other shapes, as shown in fig. 7, fig. 7 is a schematic top view structure of a touch display panel according to another embodiment of the present invention, where the first touch driving electrode C1 and the second touch driving electrode C2 are all stripe-shaped electrodes, and on a plane of the touch display panel, i.e., an XY plane, a front projection of each first touch driving electrode C1 completely overlaps a front projection of one first data line D1, and a front projection of each second touch driving electrode C2 completely overlaps a front projection of one second data line D2.
As shown in fig. 8, fig. 8 is a schematic top view structure of a touch display panel according to another embodiment of the present invention, in which, on a plane of the touch display panel, that is, an XY plane, the front projection of each first touch driving electrode C1 may also completely overlap with the front projections of the plurality of first data lines D1, and the front projection of each second touch driving electrode C2 may also completely overlap with the front projections of the plurality of second data lines D2.
In some embodiments of the present invention, as shown in fig. 9, fig. 9 is a schematic top view structure of a touch display panel according to an embodiment of the present invention, the driving circuit 11 includes a data control circuit 110 and a driving chip 111, the data control circuit 110 includes a plurality of first switch unit groups A1 and a plurality of second switch unit groups A2, the first switch unit groups A1 include at least one first switch unit K1, the second switch unit groups A2 include at least one second switch unit K2, each first switch unit K1 is connected to one first data line D1, and each second switch unit K2 is connected to one second data line D2.
And, the driving chip 111 is used for controlling the first switching unit K1 to be turned on to input the data signal to the first data line D1 in the first period T1, and controlling the second switching unit K2 to be turned on to input the data signal to the second data line D2 in the second period T2.
It should be noted that, the number of the first switch units K1 in the first switch unit group A1 is the same as the number of the first data lines D1 corresponding to each of the first touch driving electrodes C1, and the number of the second switch units K2 in the second switch unit group A2 is the same as the number of the second data lines D2 corresponding to each of the second touch driving electrodes C2, and the specific number may be set according to the actual situation, which is not limited by the present invention.
As shown in fig. 9, the number of first switch units K1 in the first switch unit group A1 is 2, the number of first data lines D1 corresponding to each of the first touch driving electrodes C1 is also 2, the number of second switch units K2 in the second switch unit group A2 is 2, and the number of second data lines D2 corresponding to each of the second touch driving electrodes C2 is also 2.
As shown in fig. 10, fig. 10 is a schematic top view of a touch display panel according to another embodiment of the present invention, the number of first switch units K1 in the first switch unit group A1 is 3, the number of first data lines D1 corresponding to each first touch driving electrode C1 is also 3, the number of second switch units K2 in the second switch unit group A2 is also 3, and the number of second data lines D2 corresponding to each second touch driving electrode C2 is also 3.
In some embodiments of the present invention, the first switch unit group A1 includes a plurality of first switch units K1, the second switch unit group A2 includes a plurality of second switch units K2, and at this time, the driving chip 111 is further configured to control the plurality of first switch units K1 in the first switch unit group A1 to be turned on sequentially in a first period T1, so as to sequentially input data signals to a plurality of first data lines D1 corresponding to each of the first touch driving electrodes C1, and control the plurality of second switch units K2 in the second switch unit group A2 to be turned on sequentially in a second period T2, so as to sequentially input data signals to a plurality of second data lines D2 corresponding to each of the second touch driving electrodes C2.
In some alternative embodiments, the first switching unit K1 and the second switching unit K2 are transistors, an input terminal of the first switching unit K1 is connected to the driving chip 111, an output terminal of the first switching unit K1 is connected to the first data line D1, a control terminal of the first switching unit K1 is connected to the first control signal line, an input terminal of the second switching unit K2 is connected to the driving chip 111, an output terminal of the second switching unit K2 is connected to the second data line D2, and a control terminal of the second switching unit K1 is connected to the second control signal line.
The control ends of a plurality of first switch units K1 in the same first switch unit group A1 are connected with different first control signal lines, and the control ends of a plurality of second switch units K2 in the same second switch unit group A2 are connected with different second control signal lines. As shown in fig. 10, the control ends of the first switch units K1 in the first switch unit group A1 are respectively connected to the first control signal lines CKH1, CKH2, CKH3, and the control ends of the second switch units K2 in the second switch unit group A2 are respectively connected to the second control signal lines CKH4, CKH5, CKH 6. In the first period T1, the driving chip 111 sequentially inputs control signals to the CKH1, CKH2, and CKH3, controls the three first switching units K1 in the first switching unit group A1 to sequentially turn on, so as to sequentially input data signals to the first data lines D11, D12, and D13, and in the second period T2, the driving chip 111 sequentially inputs control signals to the CKH4, CKH5, and CKH6, controls the three second switching units K2 in the second switching unit group A2 to sequentially turn on, so as to sequentially input data signals to the second data lines D21, D22, and D23.
In the embodiment of the present invention, the plurality of rows of pixel units 10 are respectively connected to the plurality of scan lines G, that is, each row of pixel units 10 is connected to one scan line G, as shown in fig. 11, fig. 11 is a signal timing chart of a touch display panel provided in another embodiment of the present invention, a frame data signal charging time T of the touch display panel further includes a third period T3, where the third period T3 does not overlap with the first period T1 and the second period T2, so as to avoid potential variation on the scan line G or potential variation on the first data line D1 or the second data line D2 caused by charging of the scan line G, which affects touch driving signals on the first touch driving electrode C1 and the second touch driving electrode C2, thereby affecting touch performance of the touch display panel.
Also, the driving chip 111 is configured to control the scan line G to input a scan signal to the pixel unit 10 connected thereto such that the first data line D1 and/or the second data line D2 input a data signal to the pixel unit 10 in the third period T3. That is, the driving chip 111 inputs a data signal to the first data line D1 during the first period T1, inputs a data signal to the second data line D2 during the second period T2, controls the scanning line G to input a scanning signal to the pixel unit 10 connected thereto during the third period T3, controls the transistor of the pixel unit 10 to be turned on, so that the first data line D1 or the second data line D2 connected to the source of the transistor inputs a data signal to the pixel electrode or the anode connected to the drain thereof, and controls the pixel unit 10 to emit light to display an image.
Of course, the present invention is not limited thereto, and in other embodiments, the charging time of the scan line G may overlap the first period T1 and the second period T2, as shown in fig. 12, fig. 12 is a signal timing chart of the touch display panel according to another embodiment of the present invention, where the charging time of the scan line G is greater than or equal to the charging time T of one frame of data signal, that is, the transistors of the pixel unit 10 are continuously turned on during the process of inputting the data signals to the first data line D1 and the second data line D2, so that the charging speed of the pixel unit 10 may be increased.
In the embodiment of the invention, the touch display panel further includes a plurality of touch sensing electrodes, and in some embodiments of the invention, the first touch driving electrodes C1 and the second touch driving electrodes C2 are alternately arranged in a first direction, the plurality of touch sensing electrodes are sequentially arranged in a second direction, and the touch sensing electrodes are arranged in an insulating and crossing manner with the first touch driving electrodes and/or the second touch driving electrodes, wherein the first direction is a row direction, the second direction is a column direction, or the first direction is a column direction, and the second direction is a row direction.
As shown in fig. 1, the first touch driving electrodes C1 and the second touch driving electrodes C2 are alternately arranged in the first direction, i.e. the column direction Y, at this time, as shown in fig. 13, fig. 13 is a schematic top view structure diagram of the touch sensing electrodes according to an embodiment of the present invention, and a plurality of touch sensing electrodes C3 are sequentially arranged in the second direction, i.e. the row direction X, so that the touch sensing electrodes C3 and the first touch driving electrodes C1 or the second touch driving electrodes C2 form a sensing capacitor, and the position of the touch point is determined by detecting the change of the capacitance.
Of course, in other embodiments of the present invention, as shown in fig. 7, the first touch driving electrodes C1 and the second touch driving electrodes C2 may also be alternately arranged in the first direction, i.e. the row direction X, as shown in fig. 14, fig. 14 is a schematic top view structure of the touch sensing electrodes according to another embodiment of the present invention, and the plurality of touch sensing electrodes C3 are sequentially arranged in the second direction, i.e. the column direction Y, so that the touch sensing electrodes C3 and the first touch driving electrodes C1 or the second touch driving electrodes C2 form a sensing capacitor.
In fig. 13 and 14, the touch sensing electrode C3 is only an example of a strip electrode, but the present invention is not limited to this, and in other embodiments, the touch sensing electrode C3 may be a comb-shaped electrode or the like.
In some embodiments of the present invention, the pixel unit 10 includes a first common electrode or a first cathode, and the first touch driving electrode C1 and the second touch driving electrode C2 multiplex the first common electrode or the first cathode, so as to reduce the process steps, save materials, and reduce the manufacturing cost.
In this embodiment, as shown in fig. 15, fig. 15 is a schematic cross-sectional structure of a pixel unit according to an embodiment of the invention, where the pixel unit 10 includes a first cathode 101, and of course, the pixel unit 10 further includes an anode 102, a light emitting layer 103 disposed between the first cathode 101 and the anode 102, and so on. The first touch driving electrode C1 and the second touch driving electrode C2 multiplex the first cathode 101, that is, the first cathode 101 in the pixel unit 10 corresponding to the first touch driving electrode C1 is multiplexed to be the first touch driving electrode C1, and the first cathode 101 in the pixel unit 10 corresponding to the second touch driving electrode C2 is multiplexed to be the second touch driving electrode C2.
In a display period such as a third period T3, a common voltage signal is input to the first cathode 101 so that the first cathode 101 and the anode of the LED or OLED jointly drive the LED or OLED to emit light, and display of an image is performed. In the touch period, i.e., in the first period T1, a touch driving signal is input to the first cathode 101 in the pixel unit 10 corresponding to the first touch driving electrode C1, and in the second period T2, a touch driving signal is input to the first cathode 101 in the pixel unit 10 corresponding to the second touch driving electrode C2, so as to perform touch detection.
Similarly, when the touch display panel is a liquid crystal display panel, the pixel unit 10 includes a first common electrode, where the first touch driving electrode C1 and the second touch driving electrode C2 multiplex the first common electrode, for example, the first common electrode in the pixel unit 10 corresponding to the first touch driving electrode C1 multiplexes into the first touch driving electrode C1, and the first common electrode in the pixel unit 10 corresponding to the second touch driving electrode C2 multiplexes into the second touch driving electrode C2.
In a display period such as a third period T3, a common voltage signal is input to the first common electrode so that the first common electrode and the pixel electrode drive the liquid crystal to rotate in common, and display of an image is performed. In the touch period, i.e., in the first period T1, a touch driving signal is input to the first common electrode in the pixel unit 10 disposed corresponding to the first touch driving electrode C1, and in the second period T2, a touch driving signal is input to the first common electrode in the pixel unit 10 disposed corresponding to the second touch driving electrode C2, so as to perform touch detection.
Based on the above embodiments, as shown in fig. 16, fig. 16 is a schematic top view structure of a touch display panel according to another embodiment of the invention, where the pixel unit 10 further includes a second common electrode 104 or a second cathode 105, and the second common electrode 104 or the second cathode 105 is located between the first touch driving electrode C1 and the second touch driving electrode C2, and in the display period and the touch period, the second common electrode 104 or the second cathode 105 has a common voltage signal to weaken a lateral electric field between the first touch driving electrode C1 and the second touch driving electrode C2, so as to improve the touch effect.
Of course, the present invention is not limited thereto, and in other embodiments, the second common electrode or the second cathode may be located between two adjacent first touch driving electrodes C1, or the second common electrode or the second cathode may be located between two adjacent second touch driving electrodes C2, so as to weaken the electric field between the touch driving electrodes and the touch driving electrodes, and improve the touch effect.
The embodiment of the invention also provides a touch display device, as shown in fig. 17, fig. 17 is a schematic structural diagram of the touch display device provided by the embodiment of the invention, where the touch display device P includes the touch display panel provided by any one of the embodiments, and the touch display panel includes, but is not limited to, a liquid crystal display panel, an OLED display panel, and the like, and the touch display device P includes, but is not limited to, a mobile phone, a tablet computer, a television, a digital camera, and the like.
The embodiment of the invention also provides a driving method of a touch display panel, which is applied to the touch display panel provided by any one of the embodiments, as shown in fig. 1, the touch display panel includes a plurality of first data lines D1, a plurality of second data lines D2, a plurality of first touch driving electrodes C1, a plurality of second touch driving electrodes C2, and a plurality of pixel units 10 arranged in an array, each first touch driving electrode C1 is disposed corresponding to at least one first data line D1, each second touch driving electrode C2 is disposed corresponding to at least one second data line D2, each column of pixel units 10 is connected to the first data line D1 or the second data line D2, as shown in fig. 18, and fig. 18 is a flowchart of the driving method of the touch display panel provided by one embodiment of the invention, the driving method includes:
s101: a first period in which a data signal is input to the first data line and a touch driving signal is input to the second touch driving electrode;
s102: a second period of time, inputting a data signal to the second data line, and inputting a touch driving signal to the first touch driving electrode;
the charging time of the frame data signal of the touch display panel at least comprises a first period and a second period, and the first period and the second period are not overlapped.
As shown in fig. 3, in the first period T1, a data signal is input to the first data line D1, a touch driving signal is input to the second touch driving electrode C2, in the second period T2, a data signal is input to the second data line D2, and a touch driving signal is input to the first touch driving electrode C1.
Because the front projection of each first touch driving electrode C1 at least partially overlaps with the front projection of at least one first data line D1 on the plane where the touch display panel is located, i.e., the XY plane, i.e., the first data line D1 is closer to the first touch driving electrode C1 and farther from the second touch driving electrode C2, the influence of the potential change on the first data line D1 on the signal on the first touch driving electrode C1 is greater, and therefore, in the first period T1, the data signal is input to the first data line D1, the touch driving signal is input to the second touch driving electrode C2, and the touch driving signal is not input to the first touch driving electrode C1, i.e., when the potential change on the first data line D1 occurs, the signal is not input to the first touch driving electrode C1, so that the influence of the potential change on the first data line D1 on the signal on the first touch driving electrode C1 can be avoided or reduced.
Because the orthographic projection of each second touch driving electrode C2 at least partially overlaps with the orthographic projection of at least one second data line D2 on the plane where the touch display panel is located, i.e., the second data line D2 is closer to the second touch driving electrode C2 and farther from the first touch driving electrode C1, the influence of the potential change on the second data line D2 on the second touch driving electrode C2 is larger, and therefore, in the second period T2, the data signal is input to the second data line D2, the touch driving signal is not input to the first touch driving electrode C1, i.e., when the potential change on the second data line D2 occurs, the signal is not input to the second touch driving electrode C2, so that the influence of the potential change on the second data line D2 on the signal on the second touch driving electrode C2 can be avoided or reduced.
In some embodiments of the present invention, as shown in fig. 4, each of the first touch driving electrodes C1 is disposed corresponding to a plurality of first data lines D1, and as shown in fig. 5, inputting data signals to the first data lines D1 includes: sequentially inputting data signals to the plurality of first data lines D11, D12, D13 in a first period T1;
as shown in fig. 4, each of the second touch driving electrodes C2 is disposed corresponding to a plurality of second data lines D2, and inputting data signals to the second data lines D2, as shown in fig. 5, includes:
in the second period T2, data signals are sequentially input to the plurality of second data lines D21, D22, D23.
In some embodiments of the present invention, as shown in fig. 9, the touch display panel includes a data control circuit 110, the data control circuit 110 includes a plurality of first switch unit groups A1 and a plurality of second switch unit groups A2, the first switch unit groups A1 include at least one first switch unit K1, the second switch unit groups A2 include at least one second switch unit K2, each first switch unit K1 is connected to one first data line D1, each second switch unit K2 is connected to one second data line D2, the number of first switch units K1 in the first switch unit groups A1 is the same as the number of first data lines D1 corresponding to each first touch driving electrode C1, the number of second switch units K2 in the second switch unit groups A2 is the same as the number of second data lines D2 corresponding to each second touch driving electrode C2, and inputting data signals to the first data lines D1 includes:
In the first period T1, the first switching unit K1 is controlled to be turned on to input a data signal to the first data line D1;
inputting the data signal to the second data line D2 includes:
in the second period T2, the second switching unit K2 is controlled to be turned on to input the data signal to the second data line D2.
In some embodiments of the present invention, as shown in fig. 10, the first switch unit group A1 includes a plurality of first switch units K1, and controlling the first switch units K1 to be turned on includes:
in a first period T1, controlling the plurality of first switch units K1 in the first switch unit group A1 to be turned on sequentially, so as to sequentially input data signals to the plurality of first data lines D1 corresponding to each first touch driving electrode C1;
as shown in fig. 10, the second switching unit group A2 includes a plurality of second switching units K2, and controlling the second switching units K2 to be turned on includes:
in the second period T2, the plurality of second switching units K2 in the second switching unit group A2 are controlled to be sequentially turned on to sequentially input data signals to the plurality of second data lines D2 provided corresponding to each of the second touch driving electrodes C2.
In some embodiments of the present invention, as shown in fig. 1, the touch display panel includes a plurality of scan lines G, and a plurality of rows of pixel units 10 are respectively connected to the plurality of scan lines G, as shown in fig. 11, a charging time T of a frame data signal of the touch display panel further includes a third period T3, and the third period T3 does not overlap with the first period T1 and the second period T2, so that the driving method in the embodiment of the present invention further includes:
In the third period T3, the control scan line G inputs a scan signal to the pixel unit 10 connected thereto, so that the first data line D1 and/or the second data line D2 inputs a data signal to the pixel unit 10.
That is, a data signal is input to the first data line D1 in the first period T1, a data signal is input to the second data line D2 in the second period T2, a scanning signal is input to the pixel unit 10 connected thereto in the third period T3 by controlling the scanning line G, the transistor of the pixel unit 10 is controlled to be turned on, the data signal is input to the first data line D1 or the second data line D2 connected to the source of the transistor, and the pixel electrode or the anode connected to the drain thereof is controlled to emit light to display an image. Of course, the present invention is not limited thereto, and in other embodiments, the charging time of the scan line G may also overlap the first period T1 and the second period T2, which will not be described herein.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
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 (15)
1. The touch display panel is characterized by comprising a plurality of first data lines, a plurality of second data lines, a plurality of first touch driving electrodes, a plurality of second touch driving electrodes, a plurality of pixel units arranged in an array and a driving circuit;
on a plane where the touch display panel is located, the front projection of each first touch driving electrode at least partially overlaps with the front projection of at least one first data line, the front projection of each second touch driving electrode at least partially overlaps with the front projection of at least one second data line, and each column of pixel units is electrically connected with the first data line or the second data line;
The driving circuit is used for inputting data signals to the first data line, inputting touch driving signals to the second touch driving electrode in a first period, inputting data signals to the second data line and inputting touch driving signals to the first touch driving electrode in a second period;
the charging time of the frame data signal of the touch display panel at least comprises the first period and the second period, and the first period and the second period are not overlapped.
2. The touch display panel of claim 1, wherein, on a plane in which the touch display panel is located, a front projection of each of the first touch driving electrodes at least partially overlaps a front projection of a plurality of the first data lines, and a front projection of each of the second touch driving electrodes at least partially overlaps a front projection of a plurality of the second data lines;
the driving circuit is further configured to sequentially input data signals to the plurality of first data lines during the first period, and sequentially input data signals to the plurality of second data lines during the second period.
3. The touch display panel according to claim 1, wherein the driving circuit comprises a data control circuit and a driving chip, the data control circuit comprises a plurality of first switch unit groups and a plurality of second switch unit groups, the first switch unit groups comprise at least one first switch unit, the second switch unit groups comprise at least one second switch unit, each first switch unit is connected with one first data line, each second switch unit is connected with one second data line, the number of first switch units in the first switch unit groups is the same as the number of first data lines corresponding to each first touch driving electrode, and the number of second switch units in the second switch unit groups is the same as the number of second data lines corresponding to each second touch driving electrode;
The driving chip is used for controlling the first switch unit to be conducted in the first period so as to input a data signal to the first data line, and controlling the second switch unit to be conducted in the second period so as to input a data signal to the second data line.
4. The touch display panel according to claim 3, wherein the first switching unit group includes a plurality of first switching units, and the second switching unit group includes a plurality of second switching units;
the driving chip is further used for controlling the first switch units in the first switch unit group to be sequentially conducted in the first period so as to sequentially input data signals to the first data lines corresponding to each first touch driving electrode, and controlling the second switch units in the second switch unit group to be sequentially conducted in the second period so as to sequentially input data signals to the second data lines corresponding to each second touch driving electrode.
5. The touch display panel according to claim 1 or 4, wherein the touch display panel comprises a plurality of scanning lines, a plurality of rows of pixel units are respectively connected with the plurality of scanning lines, the driving circuit comprises a driving chip, and a frame data signal charging time of the touch display panel further comprises a third period, and the third period does not overlap with the first period and the second period;
The driving chip is used for controlling the scanning line to input scanning signals to the pixel units connected with the scanning line in the third period so that the first data line and/or the second data line can input data signals to the pixel units.
6. The touch display panel of claim 1, wherein the first touch drive electrodes and the second touch drive electrodes are alternately arranged in a first direction;
the touch display panel further comprises a plurality of touch sensing electrodes, and the touch sensing electrodes are sequentially arranged in a second direction; the touch sensing electrode and the first touch driving electrode and/or the second touch driving electrode are/is arranged in an insulating and crossing manner;
wherein the first direction is a row direction and the second direction is a column direction;
alternatively, the first direction is a column direction and the second direction is a row direction.
7. The touch display panel of claim 6, wherein the first touch driving electrode comprises a plurality of strip-shaped first electrodes and the second touch driving electrode comprises a plurality of strip-shaped second electrodes; the first electrodes and the second electrodes extend in the first direction, and the first electrodes and the second electrodes are alternately arranged in the second direction.
8. The touch display panel of claim 1, wherein the pixel unit comprises a first common electrode or a first cathode;
the first touch driving electrode and the second touch driving electrode multiplex the first common electrode or the first cathode.
9. The touch display panel of claim 8, wherein the pixel unit further comprises a second common electrode or a second cathode;
the second common electrode or the second cathode is located between the first touch driving electrode and the second touch driving electrode, or the second common electrode or the second cathode is located between two adjacent first touch driving electrodes, or the second common electrode or the second cathode is located between two adjacent second touch driving electrodes.
10. The driving method of the touch display panel is characterized in that the touch display panel comprises a plurality of first data lines, a plurality of second data lines, a plurality of first touch driving electrodes, a plurality of second touch driving electrodes and a plurality of pixel units arranged in an array, each first touch driving electrode is correspondingly arranged with at least one first data line, each second touch driving electrode is correspondingly arranged with at least one second data line, each column of pixel units is connected with the first data line or the second data line, and the driving method comprises the following steps:
A first period in which a data signal is input to the first data line and a touch driving signal is input to the second touch driving electrode;
a second period of time in which a data signal is input to the second data line and a touch driving signal is input to the first touch driving electrode;
the charging time of the frame data signal of the touch display panel at least comprises the first period and the second period, and the first period and the second period are not overlapped.
11. The method of claim 10, wherein each of the first touch driving electrodes is disposed corresponding to a plurality of the first data lines, and inputting data signals to the first data lines comprises:
sequentially inputting data signals to the plurality of first data lines in the first period;
each of the second touch driving electrodes is disposed corresponding to a plurality of the second data lines, and inputting data signals to the second data lines includes:
and sequentially inputting data signals to the plurality of second data lines in the second period.
12. The method of claim 10, wherein the touch display panel includes a data control circuit, the data control circuit includes a plurality of first switch unit groups and a plurality of second switch unit groups, the first switch unit groups include at least one first switch unit, the second switch unit groups include at least one second switch unit, each first switch unit is connected to one of the first data lines, each second switch unit is connected to one of the second data lines, the number of first switch units in the first switch unit groups is the same as the number of first data lines corresponding to each of the first touch driving electrodes, the number of second switch units in the second switch unit groups is the same as the number of second data lines corresponding to each of the second touch driving electrodes, and inputting a data signal to the first data lines includes:
Controlling the first switching unit to be turned on during the first period to input a data signal to the first data line;
inputting a data signal to the second data line includes:
and controlling the second switching unit to be turned on in the second period to input a data signal to the second data line.
13. The method of claim 12, wherein the first group of switching elements comprises a plurality of first switching elements, and wherein controlling the first switching elements to conduct comprises:
in the first period, a plurality of first switch units in the first switch unit group are controlled to be sequentially conducted so as to sequentially input data signals to a plurality of first data lines corresponding to each first touch control driving electrode;
the second switch unit group includes a plurality of second switch units, and controlling the second switch units to be turned on includes:
and in the second period, controlling a plurality of second switch units in the second switch unit group to be sequentially conducted so as to sequentially input data signals to a plurality of second data lines corresponding to each second touch control driving electrode.
14. The method of claim 10, wherein the touch display panel includes a plurality of scan lines, a plurality of rows of pixel cells are respectively connected to the plurality of scan lines, a frame data signal charging time of the touch display panel further includes a third period, the third period does not overlap with both the first period and the second period, and the driving method further includes:
And the third period controls the scanning line to input a scanning signal to the pixel unit connected with the scanning line so that the first data line or the second data line inputs a data signal to the pixel unit.
15. A touch display device, comprising the touch display panel of any one of claims 1 to 9.
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