CN106775161B - Touch display panel, driving method and touch display device - Google Patents

Touch display panel, driving method and touch display device Download PDF

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Publication number
CN106775161B
CN106775161B CN201611235719.9A CN201611235719A CN106775161B CN 106775161 B CN106775161 B CN 106775161B CN 201611235719 A CN201611235719 A CN 201611235719A CN 106775161 B CN106775161 B CN 106775161B
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China
Prior art keywords
touch
driving
display panel
switch unit
touch display
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CN201611235719.9A
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Chinese (zh)
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CN106775161A (en
Inventor
唐艳芳
苏凌志
孙莹
许育民
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Tianma Microelectronics Co Ltd
Xiamen Tianma Microelectronics Co Ltd
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Tianma Microelectronics Co Ltd
Xiamen Tianma Microelectronics Co Ltd
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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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Abstract

The application discloses a touch display panel, a driving method and a touch display device. The touch display panel comprises a driving scanning circuit and 2n touch driving electrode groups, wherein the driving scanning circuit comprises 2n driving signal lines, n first switch units and n second switch units which are arranged at intervals, and each touch driving electrode group comprises a first touch driving electrode and a second touch driving electrode; a first touch drive electrode in the ith touch drive electrode group is connected with the ith drive signal line, and a second touch drive electrode in the ith touch drive electrode group is connected with the ith drive signal line through a switch unit; i. n is a natural number, i is less than or equal to 2 n. According to the scheme of the application, the second touch driving electrodes are scanned twice in the two adjacent touch sub-scanning periods, so that the boundary area between the two adjacent touch driving electrodes is the central area of the touch driving electrode group, and the touch detection precision is improved.

Description

Touch display panel, driving method and touch display device
Technical Field
The present disclosure relates generally to the field of display technologies, and in particular, to a touch display panel, a driving method and a touch display device.
Background
The touch display device can detect the coordinate position of a finger in the display screen plane of the touch display device through the touch electrode, and perform corresponding display according to the coordinate position.
In the current touch display device, the touch function is mainly implemented by two touch electrode layers (e.g., a touch driving electrode layer and a touch sensing electrode layer), where each touch electrode layer has a plurality of touch electrodes arranged in parallel, and the extending directions of the two touch electrodes intersect. And applying a touch excitation signal to each touch electrode (touch driving electrode) on one touch electrode layer, wherein when a finger touches a screen of the touch display device, the finger and some touch electrodes on the screen form coupling capacitors, and leakage current flows out of the coupling capacitors. The touch sensing circuit determines two orthogonal touch electrodes which form coupling capacitance with fingers on the two layers of touch electrodes by detecting leakage current so as to determine a touch position.
FIG. 1 is a schematic diagram of a driving scan circuit of a touch display device in the prior art, as shown in FIG. 1, a touch signal line TX1～TXnAnd a touch driving electrode TE1～TEnConnecting and driving the scanning circuit to the touch signal line TX in sequence1～TXnApplying a touch excitation signal to the touch driving electrode TE1～TEnAnd performing touch scanning.
However, when the position where the finger touches the screen is located at the boundary area between the two touch drive electrodes, the intensity of the signal detected from any one of the two touch drive electrodes may become weak (e.g., about one-third or less of the intensity of the signal touching the center area of the touch drive electrode), resulting in a decrease in the accuracy of touch detection.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a touch display panel and a touch display device, so as to solve the technical problems in the prior art.
According to an aspect of the present application, there is provided a touch display panel including a driving scan circuit and 2n touch driving electrode groups; the driving scanning circuit comprises 2n driving signal lines, n first switch units and n second switch units, wherein the first switch units and the second switch units are arranged at intervals; each switch unit comprises at least one switch, and the switches in the same switch unit are simultaneously switched on or off; each touch drive electrode group comprises at least one first touch drive electrode and at least one second touch drive electrode, the first touch drive electrodes are contained in only one touch drive electrode group, and the second touch drive electrodes are contained in two adjacent touch drive electrode groups simultaneously; a first touch drive electrode in the ith touch drive electrode group is connected with the ith drive signal line; a second touch drive electrode in the ith touch drive electrode group is connected with the ith drive signal line through a switch in the ith switch unit; wherein i and n are natural numbers, and i is less than or equal to 2 n.
In some embodiments, the first switch unit and the second switch unit are disposed on the same side of the touch driving electrode group.
In some embodiments, the first switch unit and the second switch unit are disposed at two opposite sides of the touch driving electrode group.
In some embodiments, the touch display panel further includes a touch driving electrode group, and the driving scanning circuit further includes a driving signal line and a first switch unit, the first switch unit being adjacent to the nth second switch unit.
In some embodiments, the switch is a thin film transistor.
In some embodiments, a channel type of the thin film transistor in the first switching unit is the same as a channel type of the thin film transistor in the second switching unit.
In some embodiments, a channel type of the thin film transistor in the first switching unit is different from a channel type of the thin film transistor in the second switching unit.
In some embodiments, the touch display panel includes an array substrate and a color film substrate that are disposed opposite to each other, and a liquid crystal layer interposed between the two substrates; the array substrate comprises a common electrode, and the common electrode is multiplexed as a touch drive electrode.
In some embodiments, the touch driving electrodes are stripe-shaped.
In some embodiments, the touch display panel further comprises a plurality of data lines and a plurality of scan lines intersecting the data lines in an insulated manner; the extending direction of the touch driving electrodes is the same as the extending direction of the data lines.
According to another aspect of the present application, there is also provided a method of driving a touch display panel, including: during the touch control scanning period, each driving signal line sequentially provides a driving signal, each first switch unit and each second switch unit are alternatively gated, and the signals on the driving signal lines are transmitted to touch control driving electrodes in a touch control driving electrode group; in each sub-scanning of the touch scanning, only one driving signal line provides a driving signal, and the switch unit connected with the driving signal line is conducted.
According to still another aspect of the present application, there is provided a touch display device including the touch display panel as above.
According to the touch display panel, the driving method and the touch display device, the touch driving electrode group is subjected to rolling scanning, and the at least one second touch driving electrode is scanned twice in two adjacent touch sub-scans, so that a boundary area between the two touch driving electrodes becomes a central area of the touch driving electrode group, the strength of a signal detected by the touch sensing circuit is enhanced, and the touch detection precision is improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 shows a schematic diagram of a prior art touch display panel;
FIG. 2 is a schematic diagram illustrating one embodiment of a touch display panel of the present application;
FIG. 3 shows a schematic diagram of one implementation of the touch display panel shown in FIG. 2;
FIG. 4 illustrates a timing diagram for driving the touch display panel shown in FIG. 3;
FIG. 5 shows another timing diagram for driving the touch display panel shown in FIG. 3;
FIG. 6 is a schematic diagram illustrating another embodiment of a touch display panel according to the present application;
FIG. 7 is a schematic diagram illustrating a touch display panel according to another embodiment of the present application;
fig. 8 illustrates a timing diagram for driving the touch display panel shown in fig. 7;
FIG. 9 shows a schematic block diagram of one embodiment of a touch display panel of the present application;
FIG. 10 is a schematic diagram illustrating one embodiment of a touch display panel of the present application;
fig. 11 shows a schematic flowchart of a driving method of a touch display panel of the present application;
fig. 12 shows a schematic structural diagram of an embodiment of a touch display device of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 2 is a schematic diagram illustrating an embodiment of a touch display panel according to the present application.
As shown in fig. 2, the touch display panel may include a driving scan circuit 21 and 2n touch driving electrode sets TE1～TE2nAnd n is a natural number.
The driving scanning circuit 21 may include 2n driving signal lines TX1～TX2nN first switch units SW11～SW1nAnd n second switching units SW21～SW2nA first switching unit SW11～SW1nAnd a second switching unit SW21～SW2nMay be arranged spaced apart from each other, each switching unit may comprise at least one switch, and the switches in the same switching unit may be turned on or off simultaneously.
Each touch driving electrode group may include at least one first touch driving electrode included in only one touch driving electrode group and at least one second touch driving electrode included in two adjacent touch driving electrode groups, that is, the second touch driving electrode may be shared by at least two touch driving electrode groups. For example, touch driving circuitPolar group TE1Comprises two first touch drive electrodes TE1,1And a second touch drive electrode TE2,1TE touch driving electrode group2Includes a first touch driving electrode TE1,2And two second touch drive electrodes TE2,1And TE2,2Wherein the second touch driving electrode TE2,1And is included in the touch drive electrode set TE1And TE2Middle and second touch driving electrodes TE2,2And is included in the touch drive electrode set TE2And TE3In (1). Similarly, the touch driving electrode group TE2n-1Includes a first touch driving electrode TE1,(2n-1)And two second touch drive electrodes TE2,(2n-2)And TE2,(2n-1)TE touch driving electrode group2nComprises two first touch drive electrodes TE1,2nAnd a second touch drive electrode TE2,(2n-1)Wherein the second touch driving electrode TE2,(2n-2)And is included in the touch drive electrode set TE2n-2And TE2n-1Middle and second touch driving electrodes TE2,(2n-1)And is included in the touch drive electrode set TE2n-1And TE2nIn (1).
Ith touch drive electrode group TEiFirst touch driving electrode TE in1,iAnd the ith driving signal line TXiConnecting; ith touch drive electrode group TEiSecond touch driving electrode TE in2,(i-1)And/or TE2,iThrough the switch in the ith switch unit and the ith driving signal line TXiAnd i is a natural number and is less than or equal to 2 n.
For example, in the touch driving electrode set TE1In the middle, the first touch driving electrode TE1,1And a driving signal line TX1Connected, second touch-control drive electrode TE2,1By means of a first switching unit SW11Switch and driving signal line TX in1Connecting; at the touch driving electrode group TE2In the middle, the first touch driving electrode TE1,2And a driving signal line TX2Connected, second touch-control drive electrode TE2,1And TE2,2By means of a second switching unit SW21Switch and drive inSignal line TX2And (4) connecting. From the above connection, the second touch driving electrode TE2,1By means of a first switching unit SW11Switch and driving signal line TX in1Is connected and passes through the second switching unit SW21Switch and driving signal line TX in2Connected such that the driving signal line TX is prevented1The signal is transmitted to the touch drive electrode group TE2On the other touch driving electrode in (1), or the driving signal line TX2The signal is transmitted to the touch drive electrode group TE1And other touch driving electrodes in the touch screen, so that the accuracy of touch scanning is ensured.
In this embodiment, the driving scan circuit 21 can scan one touch driving electrode group (i.e., at least one first touch driving electrode and at least one second touch driving electrode) at a time, so as to increase the speed of touch scanning.
In addition, in the touch driving electrode group, a boundary area between two adjacent touch driving electrodes is equivalent to a central area of the touch driving electrode group. Therefore, regardless of whether the position touched by the finger is the boundary area or the central area of the touch driving electrode, the touch position always corresponds to the central area of one touch driving electrode group, so that the strength of the signal detected by the touch sensing circuit is enhanced, and the touch detection precision is improved.
Although fig. 2 shows that each touch driving electrode group includes three touch driving electrodes, and two adjacent touch driving electrode groups have a common touch driving electrode (i.e. a second touch driving electrode), this is merely illustrative. It can be understood that the touch driving electrode groups may include more than two touch driving electrodes of any number, and more than one common touch driving electrode may be provided between two adjacent touch driving electrode groups, and those skilled in the art may set the touch driving electrodes according to the needs of the actual application scenario.
With continued reference to FIG. 3, a schematic diagram of one implementation of the touch display panel shown in FIG. 2 is shown.
Similar to the touch display panel shown in FIG. 2, the touch display shown in FIG. 3The panel may also include a driving scan circuit 31 and a touch driving electrode group TE1～TE2nThe driving scanning circuit 31 may also include a driving signal line TX1～TX2nA first switch unit SW11～SW1nAnd a second switching unit SW21～SW2nEach touch driving electrode group may also include at least one first touch driving electrode and at least one second touch driving electrode.
Unlike the touch display panel shown in fig. 2, the touch display panel shown in fig. 3 further specifically describes the structure of the switch unit.
As shown in fig. 3, the switches in the switch units are Thin Film Transistors (TFTs), and the driving scanning circuit 31 further includes a first switch control line CK11～CK1nAnd a second switch control line CK21～CK2n. First switch unit (e.g. SW)11) And a first switch control line (e.g., CK)11) Connected, a second switching unit (e.g. SW)21) And a second switch control line (e.g., CK)21) And (4) connecting.
Optionally, a first switching unit SW11～SW1nAnd a second switching unit SW21～SW2nCan be arranged on the touch drive electrode group TE1～TE2nOn the same side of the same. For example, the first switching unit SW may be set11～SW1nAnd a second switching unit SW21～SW2nIs disposed at the lower frame of the touch display panel, so that the driving scanning circuit 31 can also be disposed at the touch driving electrode group TE1～TE2nThe same side (i.e., the lower frame of the touch display panel), so that the layout of the driving scan circuit 31 is more compact.
Optionally, a first switching unit SW11～SW1nChannel type of the thin film transistor and the second switching unit SW21～SW2nThe channel types of the thin film transistors in (1) are the same. The thin film transistors with the same channel type are adopted, so that the manufacturing process of the touch display panel can be simplified, andthe manufacturing yield of the touch display panel is high.
Although fig. 3 shows that the transistor switches in the switch unit are NMOS (Negative channel metal oxide Semiconductor) transistors, this is only illustrative. It is understood that the transistor switches in the switch unit may be PMOS (P-channel Metal oxide semiconductor) transistors. Those skilled in the art can set the setting according to the requirements of the actual application scenario.
The operation principle of the touch display panel shown in fig. 3 will be described with reference to the timing sequence shown in fig. 4 by taking the NMOS transistor as an example of the transistor switch in the switch unit.
During touch sub-scanning period P1First switch control line CK11Providing a high level signal, a first switching unit SW11The transistor switch is turned on, and the touch signal line TX1The signal is transmitted to the touch driving electrode group TE1First touch driving electrode TE in1,1And a second touch drive electrode TE2,1To complete the TE of the touch driving electrode group1Scanning; during touch sub-scanning period P2Second switch control line CK21Providing a high level signal, a second switching unit SW21The transistor switch is turned on, and the touch signal line TX2The signal is transmitted to the touch driving electrode group TE2First touch driving electrode TE in1,2And a second touch drive electrode TE2,1And TE2,2To complete the TE of the touch driving electrode group2Scanning; at P1And P2Meanwhile, the second touch driving electrode TE2,1Is scanned twice.
Similarly, during touch subscan period Pi-1On/off control line CKi-1(the (i-1)/2 th second switch control line or the (i/2) th first switch control line) provides a high level signal, the transistor switch in the (i-1) th switch unit is conducted, and the touch signal line TXi-1The signal is transmitted to the touch driving electrode group TEi-1First touch driving electrode TE in1,(i-1)And a second touch driveElectrode TE2,(i-2)And TE2,(i-1)To complete the TE of the touch driving electrode groupi-1Scanning; during touch sub-scanning period PiOn/off control line CKiThe (i +1)/2 th first switch control line or the i/2 th second switch control line) provides a high level signal, the transistor switch in the ith switch unit is conducted, and the touch signal line TXiThe signal is transmitted to the touch driving electrode group TEiFirst touch driving electrode TE in1,iAnd a second touch drive electrode TE2,(i-1)And/or TE2,i(when i is 1, the second touch driving electrode is TE2,1(ii) a When 1 is<i<At 2n, the second touch driving electrode is TE2,(i-1)And TE2,i(ii) a When i is 2n, the second touch driving electrode is TE2,2n-1) To complete the TE of the touch driving electrode groupiScanning; at Pi-1And PiMeanwhile, the second touch driving electrode TE2,(i-1)Is scanned twice.
As can be seen from the above, when two adjacent touch driving electrode groups have at least one second touch driving electrode, the second touch driving electrode is repeatedly scanned during two adjacent touch sub-scanning periods. In this way, the touch scanning is sequentially performed on the plurality of touch driving electrode groups, and the plurality of second touch driving electrodes are sequentially and repeatedly scanned, so that the binding rolling scanning is realized.
Optionally, the touch display panel further includes a touch driving electrode group, and the driving scanning circuit further includes a driving signal line and a first switch unit, where the first switch unit is adjacent to the nth second switch unit. In this case, the touch drive electrode group TE2nAnd a touch drive electrode group TE2n+1The time sequence of the scanning and the touch driving electrode set TE2n-1And a touch drive electrode group TE2nThe time sequence when being scanned is the same, and is not described herein.
As can be seen from the above, the number of the touch driving electrode groups of the touch display panel may be even or odd, that is, the number of the touch driving electrode groups is not limited by odd or even numbers.
Optionally, each touch driving electrode groupTE1～TE2nThe number of touch driving electrodes included in (b) may be different. For example, the touch driving electrode group TE1May comprise a first touch driving electrode TE1,1And a second touch drive electrode TE2,1TE touch driving electrode group2Includes a first touch driving electrode TE1,2And two second touch drive electrodes TE2,1And TE2,2. Thus, the touch drive electrode group TE1When the touch screen is scanned, two touch driving electrodes are scanned; and the touch driving electrode group TE2When being scanned, three touch driving electrodes are scanned. When the position of the finger touching the screen is the first touch driving electrode (the first touch driving electrode TE)1,2) At the time of touch control, only the touch control driving electrode group TE1The touch signal can be detected when the touch screen is scanned; when the position of the finger touching the screen is the second touch driving electrode (second touch driving electrode TE)2,1) At the time of touch control drive electrode group TE1When being scanned and touch control drive electrode group TE2The touch signal can be detected when the touch screen is scanned. Correspondingly, the touch driving electrode group TE2nIncludes a first touch driving electrode TE1,2nAnd a second touch drive electrode TE2,(2n-1). The method can accurately determine the position touched by the finger, and improves the touch detection precision.
In addition, the first switching unit SW11～SW1nCan be controlled by a first switch control line CK1To control, the second switch unit SW21～SW2nCan be controlled by a second switch control line CK2The control is carried out, so that the number of switch control lines is greatly reduced, the wiring of the drive scanning circuit is simplified, and the layout area occupied by the drive scanning circuit is reduced.
Thus, as shown in FIG. 5, at touch scan P1～P2nMeanwhile, the first switch control line CK1And a second switch control line CK2Alternately providing a conducting signal to make the first switch unit SW11～SW1nAnd a second switching unit SW21～SW2nAlternately strobed to drive the signal lines TX1～TX2nThe signals are transmitted to a touch drive electrode group TE in sequence1～TE2n。
With continued reference to fig. 6, a schematic diagram of another embodiment of a touch display panel of the present application is shown.
Similar to the embodiment shown in fig. 2, the touch display panel in this embodiment may also include a touch driving electrode set TE1～TE2nDriving signal line TX1～TX2nA first switch unit SW11～SW1nAnd a second switching unit SW21～SW2n。
Unlike the embodiment shown in fig. 2, in the present embodiment, the first switching unit SW11～SW1nAnd a second switching unit SW21～SW2nArranged on the touch drive electrode group TE1～TE2nTo opposite sides of the panel.
Each second touch driving electrode is respectively connected with two driving signal lines through two transistor switches (one transistor switch in the first switch unit and one transistor switch in the second switch unit), and the two transistor switches are respectively arranged on two opposite sides of the touch driving electrode group under the condition that the channel types of the two transistor switches are the same, so that the wiring of a driving scanning circuit is simpler; in addition, the driving scanning circuits are distributed on two opposite sides of the touch driving electrode group, so that the frames on two opposite sides of the touch driving electrode group are made to be narrower.
The working principle of the embodiment shown in fig. 6 is the same as that of the embodiment shown in fig. 3, and the description thereof is omitted.
With continued reference to fig. 7, a schematic diagram of yet another embodiment of a touch display panel of the present application is shown.
Similar to the embodiment shown in fig. 3, the touch display panel of the present embodiment may also include a driving scan circuit 71 and a touch driving electrode set TE1～TE2nThe driving scanning circuit 71 may also include a driving signal line TX1～TX2nA first switch unit SW11～SW1nAnd a second switching unit SW21～SW2nEach ofThe touch driving electrode group may also include at least one first touch driving electrode and at least one second touch driving electrode.
Unlike the embodiment shown in fig. 3, as shown in fig. 7, the first switching unit SW11～SW1nChannel type of the thin film transistor and the second switching unit SW21～SW2nThe channel types of the thin film transistors in (1) are different. For example, the first switching unit SW11～SW1nThe transistor switch is PMOS transistor, the second switch unit SW21～SW2nThe transistor switch in (1) is an NMOS transistor.
Second switch unit SW21～SW2nCan share the first switch unit SW11～SW1nSwitch control line CK of1～CKnTherefore, the number of the switch control lines is reduced from 2n to n, the wiring of the driving scanning circuit is simplified, and the layout area occupied by the driving scanning circuit is reduced.
In this case, as shown in FIG. 8, at P1Meanwhile, the switch control line CK1Providing a high level signal, a first switching unit SW11Is turned on, the second switch unit SW21Is disconnected to drive the signal line TX1Is passed through the first switching unit SW11Is transmitted to the touch drive electrode group TE1(ii) a And at P2Meanwhile, the switch control line CK1Providing a low level signal, a first switching unit SW11Is turned off, the second switch unit SW21Is turned on to drive the signal line TX2Is passed through the second switching unit SW21Is transmitted to the touch drive electrode group TE2. Similarly, at P2n-1Meanwhile, the switch control line CKnProviding a high level signal, a first switching unit SW1nIs turned on, the second switch unit SW2nIs disconnected to drive the signal line TX2n-1Is passed through the first switching unit SW1nIs transmitted to the touch drive electrode group TE2n-1(ii) a And at P2nMeanwhile, the switch control line CKnProviding a low level signal, a first switching unit SW1nIs disconnected and opened secondOff unit SW2nIs turned on to drive the signal line TX2nIs passed through the second switching unit SW2nIs transmitted to the touch drive electrode group TE2n. Thereby realizing that one switch control line controls two adjacent switch units.
Further, a first switching unit SW11～SW1nAnd a second switching unit SW21～SW2nThe driving scanning circuit can be connected to one switch control line, namely, the number of the switch control lines is further reduced from n to 1, and thus, all switch units can be controlled by only one switch control line, so that the wiring of the driving scanning circuit is further simplified, and the layout area occupied by the driving scanning circuit is reduced.
In this case, at P1、P3、……、P2n-1During which the switch control line provides a high level signal, the first switching unit SW11～SW1nIs turned on; at P2、P4、……、P2nDuring which the switch control line provides a low level signal, and the second switching unit SW21～SW2nIs turned on. Thus, the switch control line CK provides different signals in different touch sub-scanning periods to drive the signal line TX1～TX2nThe signals are transmitted to a touch drive electrode group TE in sequence1～TE2nAnd finishing touch scanning.
Although fig. 7 shows the first switching unit SW11～SW1nThe transistor switch is NMOS transistor, the second switch unit SW21～SW2nThe transistor switches in (b) are PMOS transistors, which is merely illustrative. It can be understood that the first switching unit SW11～SW1nThe transistor switch is PMOS transistor, the second switch unit SW21～SW2nThe transistor switch in (1) is an NMOS transistor, and those skilled in the art can set the transistor switch according to the needs of the practical application scenario.
With continuing reference to FIG. 9, a schematic block diagram of one embodiment of a touch display panel of the present application is shown.
As shown in fig. 9, the touch display panel 900 may include an array substrate 920 and a color filter substrate 910 which are oppositely disposed, and a liquid crystal layer 930 disposed between the array substrate 920 and the color filter substrate 910. The array substrate 920 may include a common electrode 921, and the common electrode 921 may be reused as a touch driving electrode, that is, the common electrode 921 may receive a common voltage signal during a display period, and the common electrode 921 may receive a touch scanning signal during a touch scanning period.
The touch display panel has the advantages that the common electrode layer is reused as the touch driving electrode layer, so that the structure of the touch display panel is simplified, and the touch display panel is light and thin.
With continued reference to FIG. 10, a schematic diagram of one embodiment of a touch display panel of the present application is shown.
As shown in fig. 10, in the touch display panel 1000, the common electrode disposed on the array substrate 1010 is divided into a plurality of touch driving electrode groups TE1～TE2nEach touch driving electrode group may include at least one first touch driving electrode included in only one touch driving electrode group and at least one second touch driving electrode included in two adjacent touch driving electrode groups at the same time. Each touch driving sub-electrode can be formed into a strip shape.
The array substrate 1010 may further include a display region 1020 and a non-display region 1030 surrounding the display region 1020. Among them, the driving scanning circuit 1040 may be disposed in the non-display region 1030.
Optionally, the touch display panel 1000 may further include a plurality of data lines D arranged along the first direction x1～DmAnd a plurality of scan lines S arranged in a second direction y1-SkData line D1～DmAnd a scanning line S1-SkAnd (4) insulating and intersecting. Wherein, the touch driving electrode group TE1～TE2nThe extending direction of each touch driving electrode and the data line D1～DmThe extending directions of the touch driving electrodes are the same, that is, the touch driving electrodes extend along the second direction y. Here, m and k are natural numbers.
When the touch driving electrodes are disposed to extend along the first direction x, the driving scan circuits 1040 are generally disposed in the non-display regions 1030 on the left and right sides, so that left and right borders of the touch display panel are wider. In this embodiment, the touch driving electrodes are arranged to extend along the second direction y, so that the driving scanning circuit 1040 can be arranged in the non-display regions 1030 at the upper and lower sides, which is beneficial to implementing narrow frames at the left and right sides of the touch display panel.
A driving chip 1050 for driving the data line D is further disposed in the non-display region 10301～DmThe data signals are supplied and the driving signals are supplied to the driving scan circuit 1040.
Alternatively, the driving scan circuit 1040 may be disposed at a side of the non-display region 1030 where the driving chip 1050 is disposed. Thus, the driving chip 1050 and the data line D can be simplified1～DmAnd the layout of the touch display panel 1000 is more compact due to the routing design between the driving scanning circuits 1040.
In addition, the application also discloses a driving method of the touch display panel, which is used for driving the touch display panel of each embodiment.
Fig. 11 shows a schematic flowchart 1100 of a driving method of a touch display panel of the present application.
In step 1101, during a touch scanning period, each driving signal line sequentially provides a driving signal, each first switch unit and each second switch unit are alternately gated, and a signal on the driving signal line is transmitted to a touch driving electrode in a touch driving electrode group.
In step 1102, in each sub-scan of the touch scan, only one driving signal line provides a driving signal, and the switch unit connected to the driving signal line is turned on.
Here, when the driving method of the touch display panel of the present embodiment is applied to the touch display panel shown in fig. 2, 3 or 6, the timing diagram of each signal can be referred to as shown in fig. 4 or 5. When the driving method of the touch display panel of the present embodiment is applied to the touch display panel shown in fig. 7, the timing diagram of each signal can be seen in fig. 8.
It should be noted that although fig. 11 shows the execution sequence of step 1101 and step 1102, this is only illustrative. It will be appreciated that steps 1101 and 1102 may occur in an order different from that depicted in the figures, for example, steps 1101 and 1102 may in fact be executed substantially in parallel or in reverse order, depending on the functionality involved.
The application also discloses a touch display device, as shown in fig. 12. The touch display device 1200 may include the touch display panel as described above. It will be appreciated by those skilled in the art that the touch display device may comprise some other known structure in addition to the touch display panel as described above. Such well-known structures will not be further described in order not to obscure the focus of the present application.
The touch display device of the present application may be any device including the above touch display panel, including but not limited to a cellular phone 1200, a tablet computer, a display of a computer, a display applied to a smart wearable device, a display applied to a vehicle such as an automobile, and the like as shown in fig. 12. As long as the touch display device includes the structure of the touch display panel disclosed in the present application, it is considered to fall within the scope of the present application.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (12)

1. The touch display panel is characterized by comprising a driving scanning circuit and 2n touch driving electrode groups;
the driving scanning circuit includes 2n driving signal lines, n first switching units and n second switching units, the first switching units and the second switching units being disposed at intervals from each other; each switch unit comprises at least one switch, and the switches in the same switch unit are simultaneously switched on or off;
each touch drive electrode group comprises at least one first touch drive electrode and at least one second touch drive electrode, the first touch drive electrodes are contained in only one touch drive electrode group, and the second touch drive electrodes are contained in two adjacent touch drive electrode groups simultaneously;
the first touch driving electrode in the ith touch driving electrode group is connected with the ith driving signal line; the second touch driving electrode in the ith touch driving electrode group is connected with the ith driving signal line through the switch in the switch unit; wherein i and n are natural numbers, i is not greater than 2n, when i is an odd number, the second touch driving electrode in the ith touch driving electrode group is connected to the ith driving signal line through the switch in the (i +1)/2 th first switch unit, and when i is an even number, the second touch driving electrode in the ith touch driving electrode group is connected to the ith driving signal line through the switch in the i/2 th second switch unit.
2. The touch display panel according to claim 1, wherein the first switch unit and the second switch unit are disposed on a same side of the touch driving electrode group.
3. The touch display panel according to claim 1, wherein the first switch unit and the second switch unit are disposed on opposite sides of the touch driving electrode group.
4. The touch display panel according to claim 1, wherein the touch display panel further includes one of the touch driving electrode groups, the driving scanning circuit further includes one of the driving signal lines and one of the first switch units, and the first switch unit is adjacent to an nth one of the second switch units.
5. The touch display panel of claim 1, wherein the switch is a thin film transistor.
6. The touch display panel according to claim 5, wherein a channel type of the thin film transistor in the first switch unit is the same as a channel type of the thin film transistor in the second switch unit.
7. The touch display panel according to claim 5, wherein a channel type of the thin film transistor in the first switch unit is different from a channel type of the thin film transistor in the second switch unit.
8. The touch display panel according to claim 1, wherein the touch display panel comprises an array substrate and a color film substrate which are arranged oppositely, and a liquid crystal layer between the two substrates;
the array substrate comprises a common electrode, and the common electrode is reused as the touch drive electrode.
9. The touch display panel according to claim 8, wherein the touch driving electrodes are stripe-shaped.
10. The touch display panel according to claim 8, further comprising a plurality of data lines and a plurality of scan lines intersecting the data lines in an insulated manner;
the extending direction of the touch driving electrode is the same as the extending direction of the data line.
11. A driving method of driving the touch display panel according to claim 1, the method comprising:
during a touch scanning period, each driving signal line sequentially provides a driving signal, each first switch unit and each second switch unit are alternatively gated, and signals on the driving signal lines are transmitted to the touch driving electrodes in the touch driving electrode group;
in each sub-scanning of the touch scanning, only one driving signal line provides a driving signal, and the switch unit connected with the driving signal line is conducted.
12. A touch display device comprising the touch display panel according to any one of claims 1 to 10.
CN201611235719.9A 2016-12-28 2016-12-28 Touch display panel, driving method and touch display device Active CN106775161B (en)

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CN107463292B (en) * 2017-08-04 2020-08-21 武汉天马微电子有限公司 Display panel, display device and driving method of display panel
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CN112506377B (en) * 2020-12-09 2023-09-12 厦门天马微电子有限公司 Touch display panel, driving method thereof and touch display device

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