CN113741715B - Touch substrate, driving method thereof and display device - Google Patents
Touch substrate, driving method thereof and display device Download PDFInfo
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- CN113741715B CN113741715B CN202010472232.2A CN202010472232A CN113741715B CN 113741715 B CN113741715 B CN 113741715B CN 202010472232 A CN202010472232 A CN 202010472232A CN 113741715 B CN113741715 B CN 113741715B
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- 239000000758 substrate Substances 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000000295 complement effect Effects 0.000 claims description 7
- 230000010354 integration Effects 0.000 description 7
- 238000004088 simulation Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
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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
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
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- Human Computer Interaction (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The application discloses a touch substrate, a driving method thereof and a display device, which are used for reducing the number of touch signal lines. The touch substrate includes: the touch electrode, the switch unit, and the first signal line and the second signal line; the touch electrode array is arranged in a region divided by the first signal line and the second signal line; the switch unit includes: the first transistors are electrically connected with the touch electrodes in a one-to-one correspondence manner; the first stage of the first transistor is electrically connected with the second signal line, the second stage of the first transistor is electrically connected with the touch electrode, and the grid electrode of the first transistor is electrically connected with the first signal line; the first transistors are corresponding to a group of touch electrodes arranged along the extending direction of the first signal lines and are electrically connected with the same first signal line; a group of first transistors corresponding to the touch electrodes, which are arranged along the extending direction of the second signal line, are electrically connected with the same second signal line; the first signal line is configured to transmit a scan signal; the second signal line is configured to: the touch signal is transmitted when the first transistor is turned on.
Description
Technical Field
The application relates to the technical field of touch control, in particular to a touch control substrate, a driving method thereof and a display device.
Background
With the development of display technology, touch control and display driver integration (Touch and Display Driver Integration, TDDI), a full screen, is one of the focus of attention. In the prior art, a Chip On Film (COF) process is generally required for a full screen solution, however, the limitation of the existing COF process technology results in limited number of effective pins that can be supported by the COF product, and for a self-capacitance touch solution, a plurality of electrode blocks are required to be disposed, each electrode block needs to be electrically connected to a flexible circuit board through a lead, that is, a lead needs to be disposed for each touch electrode in one touch electrode row, a very many leads need to be disposed for one row of touch electrodes, and a very many touch pins corresponding to the touch electrode array need to be disposed correspondingly, which affects the frame and cost of the product, and the COF cannot be used.
In summary, the number of leads required to be set in the self-capacitance touch control in the prior art is very large, which results in larger product frame and higher cost.
Disclosure of Invention
The embodiment of the application provides a touch substrate, a driving method thereof and a display device, which are used for reducing the number of touch signal lines.
The embodiment of the application provides a touch substrate, the touch substrate includes: the touch electrode, the switch unit, the first signal line and the second signal line which are crossed horizontally and vertically;
the touch electrode array is arranged in a region divided by the first signal line and the second signal line;
the switching unit includes: the first transistors are electrically connected with the touch electrodes in a one-to-one correspondence manner; the first stage of the first transistor is electrically connected with the second signal line, the second stage of the first transistor is electrically connected with the touch electrode, and the grid electrode of the first transistor is electrically connected with the first signal line;
the first transistors corresponding to the touch electrodes arranged along the extending direction of the first signal line are electrically connected with the same first signal line; the first transistors corresponding to the touch electrodes arranged along the extending direction of the second signal line are electrically connected with the same second signal line;
the first signal line is configured to transmit a scan signal;
the second signal line is configured to: and transmitting a touch signal when the first transistor is started.
The touch substrate provided by the embodiment of the application is provided with the switch module, the switch module comprises the first transistors corresponding to the touch electrodes one by one, so that the first transistors can be controlled to be sequentially started through the scanning signals transmitted by the first signal lines, when the first transistors are started, the touch signals are transmitted through the second signal lines, the touch signals of the touch electrodes can be sampled, and therefore, each row of the touch electrodes only needs to be sampled through one second signal line, even if the first signal line is additionally arranged, compared with the scheme that each touch electrode needs to be led out through the second signal line independently in the prior art, the number of the signal lines can be greatly reduced, the size of a frame area can be reduced, the cost is saved, and when the touch substrate is applied to display products, the integration of touch driving and display driving is facilitated.
Optionally, the touch substrate further includes: a third signal line;
the switch module further includes: a second transistor of complementary polarity to the first transistor; the first stage of the second transistor is electrically connected with the touch electrode, the grid electrode of the second transistor is electrically connected with the first signal line, and the second stage of the second transistor is electrically connected with the third signal line;
the third signal line is configured to transmit a charging signal.
According to the touch substrate provided by the embodiment of the application, the polarities of the first transistor and the second transistor are complementary, for the first transistor and the second transistor which are electrically connected with the same touch electrode, when the first transistor is closed, the second transistor is opened, and when the first switching transistor is opened, the second transistor is closed, so that the scan driving and the charge driving of the touch electrode arranged in an array in the touch substrate can be simultaneously performed, and the scan driving and the charge driving can be simultaneously performed only by using the second signal line for scan signal transmission, the independent signal line is not required to be arranged to provide the opening signal of the second transistor, and the structure of the touch substrate can be further simplified.
Optionally, the second transistors are in one-to-one correspondence with the touch electrodes;
the extending direction of the third signal line is the same as the extending direction of the first signal line, and the second transistors corresponding to the group of touch electrodes arranged along the extending direction of the third signal line are electrically connected with the same third signal line.
Optionally, different third signal lines are electrically connected to the same charging signal terminal.
Optionally, the first transistor is an N-type transistor, and the second transistor is a P-type transistor; or the first transistor is a P-type transistor, and the second transistor is an N-type transistor.
Optionally, the touch substrate further includes: the scanning driving circuit is electrically connected with the first signal line, the rectifying feedback circuit is electrically connected with the second signal line, and the charging circuit is electrically connected with the third signal line.
Optionally, the scanning circuit includes a plurality of shift registers, and the shift registers are electrically connected to the first signal lines in a one-to-one correspondence; or,
the scanning circuit includes: a plurality of shift registers, and first multiplexers electrically connected with the shift registers in a one-to-one correspondence, wherein each first multiplexer is electrically connected with N first signal lines; wherein N is an integer greater than 1;
the rectification feedback circuit is electrically connected with the second signal wires in a one-to-one correspondence manner; or,
the rectification feedback circuit comprises second multiplexers, each second multiplexer is electrically connected with M second signal lines, wherein M is an integer greater than 1.
According to the touch substrate provided by the embodiment of the application, when the multiplexer is utilized to transmit signals, the number of signal lines of the touch substrate can be further reduced, and the production cost of products is further reduced.
The embodiment of the application provides a driving method of a touch substrate, which comprises the following steps:
providing a scanning signal for the first signal line, and controlling a first transistor in the switch module to be turned on in a time-sharing manner;
and when the first transistor is started, receiving a touch signal through the second signal line, and determining a touch position according to the touch signal.
According to the touch substrate driving method, the first transistor is controlled to be turned on in a time-sharing mode through the scanning signals transmitted by the first signal line, when the first transistor is turned on, the touch signals are transmitted by the second signal line, and therefore the touch signals of the touch electrodes can be sampled, the touch position can be determined under the condition that the touch signal lines are reduced, the size of a frame area can be reduced, cost is saved, and integration of touch driving and display driving is facilitated.
Optionally, when the touch substrate further includes a third signal line and the switch module further includes a second transistor, the method further includes:
and providing a charging signal to the third signal line.
The embodiment of the application provides a display device, the display device includes the touch substrate that this application embodiment provided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a touch substrate according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another touch substrate according to an embodiment of the present disclosure;
fig. 3 is a flow chart of a method for evaluating the charging capability of a touch substrate according to an embodiment of the present application;
fig. 4 is a flow chart of a driving method of a touch substrate according to an embodiment of the present application;
fig. 5 is a timing chart of a touch substrate according to an embodiment of the present application.
Detailed Description
The embodiment of the application provides a touch substrate, as shown in fig. 1, the touch substrate includes: a touch electrode 1, a switch unit 2, a first signal line 3 and a second signal line 4 which are crossed horizontally and vertically;
the touch electrodes 1 are arranged in an array manner in a region divided by the first signal lines 3 and the second signal lines 4;
the switching unit 2 includes: the first transistors 5 are electrically connected with the touch electrodes 1 in a one-to-one correspondence manner; a first stage of the first transistor 5 is electrically connected with the second signal line 4, a second stage of the first transistor 5 is electrically connected with the touch electrode 1, and a gate of the first transistor 5 is electrically connected with the first signal line 3;
the first transistors 5 corresponding to the group of touch electrodes 1 arranged along the extending direction of the first signal line 3 are electrically connected with the same first signal line 3; the first transistors 5 corresponding to the touch electrodes 1 arranged along the extending direction of the second signal lines 4 are electrically connected to the same second signal line 4;
the first signal line 3 is configured to transmit a scan signal sclk;
the second signal line 4 is configured to: and when the first transistor 5 is turned on, a touch signal is transmitted.
The touch substrate provided by the embodiment of the application is provided with the switch module, the switch module comprises the first transistors corresponding to the touch electrodes one by one, so that the first transistors can be controlled to be sequentially started through the scanning signals transmitted by the first signal lines, when the first transistors are started, the touch signals are transmitted through the second signal lines, the touch signals of the touch electrodes can be sampled, and therefore, each row of the touch electrodes only needs to be sampled through one second signal line, even if the first signal line is additionally arranged, compared with the scheme that each touch electrode needs to be led out through the second signal line independently in the prior art, the number of the signal lines can be greatly reduced, the size of a frame area can be reduced, the cost is saved, and when the touch substrate is applied to display products, the integration of touch driving and display driving is facilitated.
Optionally, the touch substrate further includes: a third signal line 6;
the switch module further includes: a second transistor 7 of complementary polarity to the first transistor; the first stage of the second transistor 7 is electrically connected to the touch electrode 1, the gate of the second transistor 7 is electrically connected to the first signal line 3, and the second stage of the second transistor 7 is electrically connected to the third signal line 6;
the third signal line 6 is configured to transmit a charging signal V GURD 。
According to the touch substrate provided by the embodiment of the application, the polarities of the first transistor and the second transistor are complementary, for the first transistor and the second transistor which are electrically connected with the same touch electrode, when the first transistor is closed, the second transistor is opened, and when the first switching transistor is opened, the second transistor is closed, so that the scan driving and the charge driving of the touch electrode arranged in an array in the touch substrate can be simultaneously performed, and the scan driving and the charge driving can be simultaneously performed only by using the second signal line for scan signal transmission, the independent signal line is not required to be arranged to provide the opening signal of the second transistor, and the structure of the touch substrate can be further simplified.
Optionally, as shown in fig. 1, the second transistors are in one-to-one correspondence with the touch electrodes.
I.e., each touch electrode is electrically connected to a set of complementary transistors.
Optionally, as shown in fig. 1, the extending direction of the third signal line is the same as the extending direction of the first signal line, and the second transistors corresponding to the group of touch electrodes arranged along the extending direction of the third signal line are electrically connected to the same third signal line.
In fig. 1, the third signal line is illustrated as being located between the touch electrode and the first signal line, and in implementation, the third signal line may be disposed according to specific arrangement of the film layers of each structure of the touch substrate.
Optionally, as shown in fig. 1, different third signal lines are electrically connected to the same charging signal terminal.
Optionally, as shown in fig. 1, the first transistor is an N-type transistor, and the second transistor is a P-type transistor.
Of course, the first transistor may be a P-type transistor, and the second transistor may be an N-type transistor.
Optionally, the first transistor and the second transistor are thin film transistors; alternatively, the first transistor and the second transistor are metal oxide semiconductor transistors.
Optionally, the touch substrate further includes: a scan driving circuit electrically connected to the first signal line, a rectification feedback circuit (AFE) electrically connected to the second signal line, and a charging circuit electrically connected to the third signal line.
Optionally, the scanning circuit includes a plurality of shift registers, and the shift registers are electrically connected to the first signal lines in a one-to-one correspondence; or,
as shown in fig. 2, the scanning circuit includes: a plurality of shift registers 8, and first Multiplexers (MUXs) 9 electrically connected to the shift registers in a one-to-one correspondence, each of the first multiplexers being electrically connected to N of the first signal lines; wherein N is an integer greater than 1. I.e. the first multiplexer selects one of the multiplexers for N.
It should be noted that, fig. 2 only illustrates one first multiplexer to illustrate a connection relationship between the first multiplexer and the first signal line, and the touch substrate provided in this embodiment of the present application, as shown in fig. 2, may further include a driving chip 10, in fig. 2, a control end of the first multiplexer 9 is electrically connected to the driving chip 10, and an input end of the shift register 8 is electrically connected to the driving chip 10. The driving chip can provide scanning signals and gating signals for the scanning driving circuit, the AFE and the charging circuit can be arranged in the driving chip, namely the driving chip provides the scanning signals and the gating signals to drive the switch module in a time-sharing way, the driving chip provides charging signals for the third signal line to charge the touch electrode, and when the first transistor is started, the second signal line is received to transmit the touch signal, so that the sensing quantity change of each touch electrode is sampled, and the touch position is determined. The touch substrate provided by the embodiment of the application can greatly reduce the number of the touch signal lines, so that the design of the driving chip can adopt a COF process, the size of the frame is further reduced, and the narrow frame is facilitated to be realized.
In the implementation, the scan signal output by the shift register may be divided by using the N-selection multiplexer, and the divided scan signal may be output to N first signal lines electrically connected to the N-selection multiplexer, so as to realize time-sharing driving of the first transistor and the second transistor in the switch module.
Optionally, the rectifying feedback circuit is electrically connected with the second signal line in a one-to-one correspondence manner; or,
the rectification feedback circuit comprises second multiplexers, each second multiplexer is electrically connected with M second signal lines, wherein M is an integer greater than 1. I.e. the second multiplexer selects one of the multiplexers for M.
According to the touch substrate provided by the embodiment of the application, when the multiplexer is utilized to transmit signals, the number of signal lines of the touch substrate can be further reduced, and the production cost of products is further reduced.
In particular, when using a data selector of N, for example, a plurality of first signal lines may be grouped, each group including N first signal lines electrically connected to one multiplexer of N. When using a M-ary data selector, a plurality of second signal lines may be grouped, each group including M second signal lines electrically connected to one M-ary multiplexer, i.e., different groups of second signal lines are connected to different AFEs.
It should be noted that, the touch substrate provided in the embodiment of the present application may be driven by a row scanning manner or may be driven by a column scanning manner. For a line scanning mode, the first transistor is controlled to be turned on line by line according to a scanning signal transmitted by the second signal line, so that collection of touch signals is realized, when the first transistor is turned off and the second transistor is turned on, the touch electrodes are charged, and therefore cross gating of charging signals and the touch signals can be realized, and charging and driving of the touch electrodes in a non-sampling time period can be realized. For a column scanning mode, by controlling the first transistors corresponding to the same column of touch electrodes to be turned on at different times, touch signal acquisition of the touch electrodes corresponding to each group of second signal lines is completed in sequence, and when the first transistors are turned off and the second transistors are turned on, the touch electrodes are charged.
Note that the values of M, N may or may not be equal. The value of M, N can be selected according to actual needs, for example, according to the driving capability of the driving chip. In a specific implementation, the value of M, N may be, for example, 4, that is, when the first signal lines need to be grouped, every 4 first signal lines are grouped, and when the second signal lines need to be grouped, every 4 second signal lines are grouped. In fig. 1, 4 second signal lines are electrically connected to one rectifying feedback circuit AFE for illustration.
In implementation, when a specific structure of the touch substrate is designed, the charging capability of the touch substrate can be tested and evaluated to evaluate the load of the touch substrate, and whether the driving of the touch substrate can be realized or not is judged according to the evaluation result so as to perform risk prediction. For example, a simulation experiment can be performed to obtain a simulation capacitance value C of the touch substrate total Simulation resistance value R of touch substrate total On-resistance simulation value R' on As shown in fig. 3, the following steps may be adopted to evaluate the charging capability of the touch substrate:
s101, inputting a driver signal;
s102, calling a preset driver model and address +1;
s103, judging whether the input driver model is consistent with the preset driver model, if so, executing a step S104, otherwise, executing a step S102;
s104, calling a driving capability parameter RC of a preset driver;
s105, inputting the simulation capacitance value C of the touch substrate total ；
S106, inputting the simulation resistance value R of the touch substrate total ；
S107, according to the formula: r is R on ＝RC/(C total -R total ) Obtaining an on-state resistance standard value R on ；
S108, inputting R' on ；
S109, judging whether R' on <R on The method comprises the steps of carrying out a first treatment on the surface of the When R 'is' on <R on When the design scheme of the touch substrate is determined to be feasible, otherwise, outputting R on As a design reference value of the touch substrate, the design of the touch substrate is adjusted.
Based on the same inventive concept, the embodiment of the present application provides a driving method of a touch substrate, as shown in fig. 4, the method includes:
s201, providing a scanning signal for the first signal line, and driving a first transistor in the switch module to be turned on in a time-sharing manner;
s202, when the first transistor is started, a touch signal is received through the second signal line, and the touch position is determined according to the touch signal.
According to the touch substrate driving method, the first transistor is controlled to be turned on in a time-sharing mode through the scanning signals transmitted by the first signal line, when the first transistor is turned on, the touch signals are transmitted by the second signal line, and therefore the touch signals of the touch electrodes can be sampled, the touch position can be determined under the condition that the touch signal lines are reduced, the size of a frame area can be reduced, cost is saved, and integration of touch driving and display driving is facilitated.
Optionally, when the touch substrate further includes a third signal line and the switch module further includes a second transistor, the method further includes:
and providing a charging signal to the third signal line.
Specifically, when the second switch is turned on, the charging signal is input to the touch electrode through the second transistor, and the touch electrode is charged.
Next, taking a row scanning manner as an example, the driving timing of the touch substrate shown in fig. 1 is illustrated, as shown in fig. 5, the control timing SMUX describes the scanning signals Sclk1, sclk2, sclk3, sclk4, as the first transistor on signals of each row, sclk1, sclk2, sclk3, sclk4 are sequentially set to high potential, the first transistors of each row of fig. 1 are sequentially turned on, the SMUX signal also controls the rectification feedback circuit AFE to perform touch driving through the second signal line, whenWhen the first transistor is turned off and the second transistor is turned on, the charging signal V GURD And inputting a touch electrode, realizing the cross gating of a charging signal and the touch signal through a complementary transistor, and charging and driving the touch electrode in a non-sampling time period.
The embodiment of the application provides a display device, which comprises a touch substrate provided by the embodiment of the application.
The display device provided by the embodiment of the application can be a device such as a mobile phone, a tablet personal computer, a television and the like.
The display device provided in the embodiment of the application may be a liquid crystal display device or an organic light emitting diode display device. When the display device is a liquid crystal display device, the touch electrode in the touch substrate can be multiplexed into a common electrode for liquid crystal display, and the second data line is also used for transmitting a common voltage signal in the display stage.
In summary, the touch substrate, the touch method and the display device thereof provided in the embodiments of the present application, the touch substrate is provided with the switch module, the switch module includes the first transistors corresponding to the touch electrodes one by one, so that the first transistors can be controlled to be turned on sequentially by the scan signals transmitted by the first signal lines, when the first transistors are turned on, the touch signals can be transmitted by the second signal lines, and thus, the touch signals of the touch electrodes can be sampled, each row of the touch electrodes only needs to pass through one second signal line, even if the first signal line is added, compared with the scheme that each touch electrode needs to be led out by the second signal line alone in the prior art, the number of the signal lines can be greatly reduced, the size of the frame area can be reduced, the cost can be saved, and when the touch substrate is applied to display products, the integration of touch driving and display driving is facilitated.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (8)
1. A touch substrate, characterized in that the touch substrate comprises: the touch electrode, the switch unit, the first signal line and the second signal line which are crossed horizontally and vertically;
the touch electrode array is arranged in a region divided by the first signal line and the second signal line;
the switching unit includes: the first transistors are electrically connected with the touch electrodes in a one-to-one correspondence manner; the first stage of the first transistor is electrically connected with the second signal line, the second stage of the first transistor is electrically connected with the touch electrode, and the grid electrode of the first transistor is electrically connected with the first signal line;
the first transistors corresponding to the touch electrodes arranged along the extending direction of the first signal line are electrically connected with the same first signal line; the first transistors corresponding to the touch electrodes arranged along the extending direction of the second signal line are electrically connected with the same second signal line;
the first signal line is configured to transmit a scan signal;
the second signal line is configured to: transmitting a touch signal when the first transistor is started;
the touch substrate further includes: a third signal line;
the switch module further includes: a second transistor of complementary polarity to the first transistor; the first stage of the second transistor is electrically connected with the touch electrode, the grid electrode of the second transistor is electrically connected with the first signal line, and the second stage of the second transistor is electrically connected with the third signal line;
the third signal line is configured to transmit a charging signal;
the second transistors are in one-to-one correspondence with the touch electrodes;
the extending direction of the third signal line is the same as the extending direction of the first signal line, and the second transistors corresponding to the group of touch electrodes arranged along the extending direction of the third signal line are electrically connected with the same third signal line.
2. The touch substrate of claim 1, wherein different ones of the third signal lines are electrically connected to a same charging signal terminal.
3. The touch substrate of claim 1, wherein the first transistor is an N-type transistor and the second transistor is a P-type transistor; or the first transistor is a P-type transistor, and the second transistor is an N-type transistor.
4. The touch substrate of claim 1, further comprising: the scanning driving circuit is electrically connected with the first signal line, the rectifying feedback circuit is electrically connected with the second signal line, and the charging circuit is electrically connected with the third signal line.
5. The touch substrate according to claim 1, wherein the scanning circuit comprises a plurality of shift registers, and the shift registers are electrically connected to the first signal lines in a one-to-one correspondence; or,
the scanning circuit includes: a plurality of shift registers, and first multiplexers electrically connected with the shift registers in a one-to-one correspondence, wherein each first multiplexer is electrically connected with N first signal lines; wherein N is an integer greater than 1;
the rectification feedback circuit is electrically connected with the second signal wires in a one-to-one correspondence manner; or,
the rectification feedback circuit comprises second multiplexers, each second multiplexer is electrically connected with M second signal lines, wherein M is an integer greater than 1.
6. A driving method of a touch substrate according to any one of claims 1 to 5, comprising:
providing a scanning signal for the first signal line, and controlling a first transistor in the switch module to be turned on in a time-sharing manner;
and when the first transistor is started, receiving a touch signal through the second signal line, and determining a touch position according to the touch signal.
7. The method of claim 6, wherein when the touch substrate further comprises a third signal line and the switch module further comprises a second transistor, the method further comprises:
and providing a charging signal to the third signal line.
8. A display device, characterized in that the display device comprises a touch substrate according to any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010472232.2A CN113741715B (en) | 2020-05-29 | 2020-05-29 | Touch substrate, driving method thereof and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010472232.2A CN113741715B (en) | 2020-05-29 | 2020-05-29 | Touch substrate, driving method thereof and display device |
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| Publication Number | Publication Date |
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| CN113741715A CN113741715A (en) | 2021-12-03 |
| CN113741715B true CN113741715B (en) | 2024-01-23 |
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| CN114442848B (en) * | 2022-01-25 | 2023-09-05 | 武汉华星光电半导体显示技术有限公司 | touch display panel |
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