CN106951118B - Touch display device and driving method thereof - Google Patents
Touch display device and driving method thereof Download PDFInfo
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- CN106951118B CN106951118B CN201710157002.5A CN201710157002A CN106951118B CN 106951118 B CN106951118 B CN 106951118B CN 201710157002 A CN201710157002 A CN 201710157002A CN 106951118 B CN106951118 B CN 106951118B
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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
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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Abstract
The embodiment of the invention provides a touch display device and a driving method thereof. The touch display device includes: the pixel electrode layer comprises a plurality of pixel electrodes, and the common electrode layer comprises a plurality of common electrodes arranged in an array; the common electrodes are reused as touch electrodes, and one touch electrode is electrically connected with at least one touch electrode wire and is insulated from the rest touch electrode wires; the touch display device further includes: a pressure electrode section including: the pressure driving electrode part and the pressure sensing electrode part are multiplexed by a plurality of data lines, the pressure sensing electrode part is positioned on one side of the first substrate far away from the second substrate, and the pressure sensing electrode part comprises at least one pressure sensing electrode. Therefore, the technical scheme provided by the embodiment of the invention can solve the problem that the random report point phenomenon is easy to occur because the pressure signal and the touch signal cannot be separated in the prior art.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of microelectronics, in particular to a touch display device and a driving method thereof.
[ background of the invention ]
Currently, touch display devices are used as communication tools between people and electronic devices, and are widely used in various fields. In the prior art, most touch display devices adopt a capacitive pressure sensing principle, and a pressure value is estimated by detecting a capacitance change caused by pressure-induced deformation of the surface of the touch display device. In addition, in the conventional touch display device, the pressure detection and the touch detection are realized by multiplexing the same electrode in a time-sharing manner.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:
in the prior art, since the pressure detection and the touch detection are realized by time-sharing multiplexing of the same electrode, when the touch display device detects through the same electrode, the pressure signal and the touch signal cannot be completely separated, and then the detected pressure signal is easily superposed in the touch signal, so that the touch signal amount is increased, and a random point reporting phenomenon occurs.
[ summary of the invention ]
In view of the above, embodiments of the present invention provide a touch display device and a driving method thereof, so as to solve the problem in the prior art that a dot-disturbing phenomenon is easily caused due to the fact that a pressure signal and a touch signal cannot be separated.
In one aspect, an embodiment of the present invention provides a touch display device, including:
a first substrate and a second substrate disposed opposite to the first substrate;
one side of the first substrate close to the second substrate comprises:
the thin film transistor array layer comprises a plurality of gate lines arranged in parallel and a plurality of data lines arranged in parallel, and the gate lines and the data lines are crossed and insulated to define a plurality of pixel units;
the pixel electrode layer comprises a plurality of pixel electrodes, and the common electrode layer comprises a plurality of common electrodes arranged in an array; the common electrodes are reused as touch electrodes, and one touch electrode is electrically connected with at least one touch electrode wire and is insulated from the rest touch electrode wires;
the touch display device further includes:
a pressure electrode section including: the data lines are multiplexed into the pressure driving electrode part, the pressure sensing electrode part is positioned on one side of the first substrate, which is far away from the second substrate, and the pressure sensing electrode part comprises at least one pressure sensing electrode.
In another aspect, an embodiment of the present invention provides a driving method for a touch display device, where the touch display device includes:
a first substrate and a second substrate disposed opposite to the first substrate;
one side of the first substrate close to the second substrate comprises:
the thin film transistor array layer comprises a plurality of gate lines arranged in parallel and a plurality of data lines arranged in parallel, and the gate lines and the data lines are crossed and insulated to define a plurality of pixel units;
the pixel electrode layer comprises a plurality of pixel electrodes, and the common electrode layer comprises a plurality of common electrodes arranged in an array; the common electrodes are reused as the touch electrodes, and one touch electrode is electrically connected with at least one touch electrode wire and is insulated from the rest touch electrode wires;
the touch display device further includes:
a pressure electrode section including: the data lines are multiplexed into the pressure driving electrode part, the pressure sensing electrode part is positioned on one side of the first substrate, which is far away from the second substrate, and the pressure sensing electrode part comprises at least one pressure sensing electrode;
the method comprises the following steps: the touch control system comprises a plurality of driving cycles, a touch control unit and a touch control unit, wherein each driving cycle comprises a display stage, a touch control detection stage and a pressure induction stage;
in the display stage, the data lines output data signals;
in the touch detection stage, the touch electrode outputs a touch sensing signal;
in the pressure sensing stage, the data lines output pressure driving signals, and the pressure sensing electrodes output pressure sensing signals.
One of the above technical solutions has the following beneficial effects:
in the touch display device provided by the embodiment of the invention, on one hand, the common electrode can be multiplexed as a touch electrode to detect a touch signal, and on the other hand, a pressure sensing electrode part is added in the touch display device, and a plurality of multiplexed data lines are used as pressure driving electrode parts to form a complete pressure electrode part to detect the pressure signal; therefore, the detection of the pressure signal and the detection of the touch signal can be carried out separately, the two detection capacitors are independent in physical position and function, the pressure signal and the touch signal can be completely separated, and the phenomenon that the touch signal quantity is increased due to the fact that the pressure signal is superposed with the touch signal is avoided.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a schematic cross-sectional view of a touch display device according to an embodiment of the invention;
fig. 2 is another schematic cross-sectional view of a touch display device according to an embodiment of the invention;
fig. 3 is a schematic cross-sectional view of a touch display device according to an embodiment of the invention;
FIG. 4a is a top view of the self-contained pressure sensing electrode portion;
FIG. 4b is a top view of the data lines corresponding to the self-contained pressure sensing electrode portions;
FIG. 5a is a top view of the structure of the mutually compatible pressure sensing electrode portion;
FIG. 5b is a top view of a plurality of data lines corresponding to the mutually capacitive pressure-sensing electrode portions;
FIG. 6 is a top view of the data line switching unit on the panel of the touch display device;
FIG. 7 is a top view of the data line switching unit in the driving chip of the touch display device;
FIG. 8 is a schematic diagram of a data line switching unit;
fig. 9 is a schematic diagram of driving signals of a touch display device having a self-contained pressure-sensitive electrode unit;
fig. 10 is a schematic diagram of driving signals of a touch display device having a mutual capacitance type pressure-sensitive electrode unit.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, third, etc. may be used to describe the substrates, etc. in embodiments of the present invention, the substrates should not be limited to these terms. These terms are only used to distinguish the substrates from each other. For example, the first substrate may also be referred to as a second substrate, and similarly, the second substrate may also be referred to as a first substrate, without departing from the scope of embodiments of the present invention.
The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
Aiming at the problem that in the prior art, because pressure detection and touch detection are realized by time-sharing multiplexing of the same electrode in a touch display device such as a liquid crystal display, the touch display device cannot completely separate a pressure signal from a touch signal and is easy to generate a point random report phenomenon, the embodiment of the invention provides the following solution: the touch display device is used for detecting a pressure signal through the independent pressure electrode part, and detecting a touch signal by using the multiplexing of the common electrode as the touch electrode, so that the pressure signal and the touch signal are completely separated, and the phenomenon of point messing is avoided.
Under the guidance of this idea, the present embodiment provides the following feasible embodiments.
The embodiment of the invention provides a touch display device.
Specifically, please refer to fig. 1, which is a schematic cross-sectional view of a touch display device according to an embodiment of the present invention, as shown in fig. 1, the touch display device includes:
a first substrate 11 and a second substrate 12 disposed opposite to the first substrate 11; wherein, one side of the first substrate 11 close to the second substrate 12 includes: the thin film transistor array layer 13, the thin film transistor array layer 13 includes a plurality of gate lines arranged in parallel, a plurality of data lines arranged in parallel, the plurality of gate lines and the plurality of data lines are crossed and insulated to define a plurality of pixel units; the pixel electrode layer 14 comprises a plurality of pixel electrodes, and the common electrode layer 15 comprises a plurality of common electrodes arranged in an array; the common electrodes are reused as touch electrodes, and one touch electrode is electrically connected with at least one touch electrode wire and is insulated from the rest touch electrode wires; the touch display device further includes: a pressure electrode portion 16, the pressure electrode portion 16 including: the pressure driving electrode part 161 and the pressure sensing electrode part 162, the plurality of data lines are multiplexed into the pressure driving electrode part 161, the pressure sensing electrode part 162 is located on one side of the first substrate 11 far away from the second substrate 12, and the pressure sensing electrode part 162 includes at least one pressure sensing electrode.
In the touch display device shown in fig. 1, the pressure driving electrode portion 161 is multiplexed by a plurality of data lines, and the data lines are located in the thin film transistor array layer 13, so that the pressure driving electrode portion 161 is a part of the thin film transistor array layer 13. The embodiment of the present invention does not particularly limit the portion of the thin film transistor array layer 13 other than the driving electrode portion 161. Alternatively, in the prior art, the thin film transistor array layer 13 generally includes a plurality of gate lines, a plurality of data lines, and a semiconductor layer.
In some alternative implementations, as in the touch display device shown in fig. 1, the first substrate may be a substrate base substrate, and the second substrate may be a glass cover plate. In an actual implementation process, when the first substrate 11 is a substrate and the second substrate 12 is cover glass, a color filter substrate may be further disposed on a side of the second substrate 12 close to the first substrate 11, and liquid crystal is filled between the color filter substrate and the common electrode 15.
For the touch display device shown in fig. 1, in the process of driving the touch display device, a plurality of driving periods may be included, each driving period including: the method comprises a display stage, a touch detection stage and a pressure induction stage.
Specifically, in the display phase, the plurality of data lines output data signals. At this time, the common electrode 15 outputs a common voltage (Vcom voltage), and the pressure-sensitive electrode portion 162 is suspended or grounded.
In the touch detection stage, the touch electrode (common electrode multiplexing) outputs a touch sensing signal.
In the touch detection stage, the touch electrodes receive a touch driving signal, which is usually a pulse signal in the prior art, and the touch electrodes are used for sensing a touch operation and then outputting a touch sensing signal. In order to reduce signal interference caused by the routing of the data lines to the detection of the touch signals, a plurality of data lines can be driven to output touch driving signals or be grounded. When the plurality of data lines output the touch driving signals, the frequency, the phase and the amplitude of the touch driving signals output by the data lines are completely consistent with those of the touch driving signals received by the touch electrodes, so that signal interference caused by routing of the data lines to detection of the touch signals is reduced.
It should be noted that panel traces having strong coupling with the common electrode, for example, a high logic level of the thin film transistor and a low logic level of the thin film transistor, also exist in the touch display device, and these panel traces and the common electrode may adversely affect the detection of the touch signal due to the strong coupling. Therefore, the panel wirings can be driven to output the touch driving signal in a touch detection stage, or the panel wirings are driven to increase the amplitude of the output touch driving signal on the basis of the amplitude of the original output signal, so that the coupling effect between the panel wirings and the common electrode is reduced, and the detection accuracy of the touch signal is improved.
In the embodiment of the invention, the touch electrodes are multiplexed by common electrodes, and the common electrodes are arranged in an array, namely, the touch electrodes are in a self-capacitance type structure. The touch control electrode receives a touch control driving signal, the touch control electrode pair forms a ground capacitance, when a finger of a user or other touch control objects perform touch control operation on the touch control display device, the ground capacitance of the common electrode changes to cause the charge quantity of the common electrode to change, so that current is a touch control sensing signal, and the driving chip can determine the position of a touch control point according to the touch control sensing signal output by each common electrode.
In some optional implementation manners, the touch driving signal related to the foregoing description in the embodiment of the present invention may be a self-capacitance pulse signal, and a frequency, an amplitude, a phase, and the like of the self-capacitance pulse signal may be preset according to actual needs, which is not particularly limited in the embodiment of the present invention.
In the pressure sensing stage, the plurality of data lines output pressure driving signals, and the pressure sensing electrodes output pressure sensing signals.
In the pressure sensing stage, in order to shield interference of the touch signal caused by the touch of the user finger or other touch object on the touch display device to the pressure sensing, the touch electrode may be grounded, that is, the common electrode is grounded.
In the embodiment of the present invention, in order to further separate the pressure sensing signal from the touch signal, a buffering stage may be added between the continuous execution of the touch detection stage and the pressure sensing stage in the driving cycle. In the buffering stage, neither the touch detection capacitor nor the pressure detection capacitor is detected, and at this time, the touch electrode (common electrode), the plurality of data lines, and the pressure sensing electrode are all grounded.
In the touch display device shown in fig. 1, the pressure driving electrode 161 and the pressure sensing electrode 162 in the pressure electrode 16 form a pressure detection capacitor for detecting a pressure signal on the touch display device; the common electrode in the common electrode layer 15 is reused as a touch electrode, and the touch electrode array is arranged to form a self-capacitance touch detection capacitor for detecting a touch signal on the touch display device. Therefore, the pressure detection capacitor and the touch detection capacitor are physically independent; and the pressure detection capacitor is used for detecting a pressure signal, the touch detection capacitor is used for detecting a touch signal, and the two capacitors also work independently in function, so that the condition that the pressure signal detected by the pressure detection capacitor is superposed on the touch signal detected by the touch detection capacitor is avoided, and the problem of messy report points can be effectively solved.
In the embodiment of the invention, the pressure sensing electrode part is positioned on one side of the first substrate far away from the second substrate. Based on the difference in the structure of the touch display device, the following two implementation manners of the touch display device are provided in the embodiments of the present invention:
first, the pressure-sensitive electrode is disposed in the middle of the backlight module.
Specifically, please refer to fig. 2, which is another schematic cross-sectional view of a touch display device according to an embodiment of the present invention, as shown in fig. 2, the touch display device includes: the liquid crystal display device comprises a first substrate 11, a second substrate 12, a thin film transistor array layer 13, a pixel electrode layer 14, a common electrode layer 15 and a pressure electrode part 16.
Specifically, as shown in fig. 2, the first substrate 11 and the second substrate 12 are disposed opposite to each other, and the thin film transistor array layer 13, the pixel electrode layer 14, and the common electrode layer 15 are disposed on a side of the first substrate 11 close to the second substrate 12. As shown in fig. 2, the pressure driving electrode section 161 in the pressure electrode section 16 is a multiplex of a plurality of data lines, and therefore, the pressure driving electrode section 16 is located in the thin film transistor array layer 13.
Specifically, as shown in fig. 2, a backlight module 17 is disposed on a side of the first substrate 11 away from the second substrate 12, and a gap C exists between the backlight module 17 and the first substrate 11. Optionally, the backlight module 17 and the first substrate 11 are fixed by adhering a double-sided tape 176. As shown in fig. 2, the backlight module 17 includes: an optical film material 171 and a backlight supporting frame 172 sequentially disposed in a direction in which the first substrate 11 is distant from the second substrate 12; the pressure-sensitive electrode section 162 in the pressure electrode section 16 is located between the optical film material 171 and the backlight support frame 172.
It should be noted that, in the touch display device shown in fig. 2, the backlight module 17 is located at the bottom layer of the entire touch display device, and at this time, the backlight supporting frame 172 can play a role of supporting the entire backlight module and the entire touch display device. Therefore, as shown in fig. 2, the touch display device does not need to add an additional supporting frame in the whole touch display device. Alternatively, the optical film material 171 includes a light guide plate, a reflective sheet, a diffusion sheet, a brightness enhancement film, and the like.
And secondly, the pressure sensing electrode part is arranged between the backlight module and the integral middle frame and is close to the integral middle frame.
Specifically, please refer to fig. 3, which is a schematic cross-sectional view of a touch display device according to an embodiment of the present invention, as shown in fig. 3, the touch display device includes: the liquid crystal display device comprises a first substrate 11, a second substrate 12, a thin film transistor array layer 13, a pixel electrode layer 14, a common electrode layer 15 and a pressure electrode part 16.
Specifically, as shown in fig. 3, the first substrate 11 and the second substrate 12 are disposed opposite to each other, and the thin film transistor array layer 13, the pixel electrode layer 14, and the common electrode layer 15 are disposed on a side of the first substrate 11 close to the second substrate 12. As shown in fig. 3, the pressure driving electrode section 161 in the pressure electrode section 16 is a multiplex of a plurality of data lines, and therefore, the pressure driving electrode section 16 is located in the thin film transistor array layer 13.
Specifically, as shown in fig. 3, a backlight module 17 is disposed on a side of the first substrate 11 away from the second substrate 12, a whole middle frame 18 is disposed on a side of the backlight module 17 away from the first substrate 11, and a gap C exists between the whole middle frame 18 and the backlight module 17. As shown in fig. 3, the pressure sensing electrode portion 162 of the pressure electrode portion 16 is located on the side of the whole middle frame 18 close to the first substrate 11, and is adjacent to the whole middle frame 18.
It should be noted that, as shown in fig. 3, in the touch display device, the whole middle frame 18 may be used as a supporting frame of the whole touch display device, and therefore, it is not necessary to add a supporting frame for supporting the backlight module in the backlight module 17, as shown in fig. 3, optionally, the backlight module 17 and the first substrate 11 are fixed by adhering the double-sided tape 176. The backlight assembly 17 may include: the optical film does not include a backlight support frame.
It should be noted that, the embodiment of the present invention exemplarily shows two setting manners of the pressure-sensitive electrode portion. In other alternative implementations, embodiments in which the pressure-sensitive electrode portion is located on a side of the first substrate away from the second substrate are within the scope of the present invention.
In some alternative implementations, the embodiment of the present invention also specifies the specific structure of the pressure sensing electrode part 162 in the pressure electrode part 16.
Based on the design architecture of the pressure sensing electrode in the pressure sensing electrode part 162, the following two architecture modes are provided in the embodiment of the present invention:
first, the pressure-sensitive electrode 162 is a self-contained structure.
Specifically, please refer to fig. 4a, which is a top view of the self-contained pressure sensing electrode. The rectangular blank area in fig. 4a corresponds to the pressure-sensitive electrode 001, and as shown in fig. 4a, the pressure-sensitive electrode section 162 includes a plurality of pressure-sensitive electrodes 001, and the plurality of pressure-sensitive electrodes 001 are distributed in a matrix.
As shown in fig. 4a, the connection line connected between the pressure sensing electrodes 001 and 003 represents a trace 002 of the pressure sensing electrode, and the region corresponding to 003 represents a Flexible Printed Circuit (FPC) or an Integrated Circuit (IC).
As shown in fig. 4a, each pressure sensing electrode 001 is connected to a Flexible Printed Circuit (FPC) or an Integrated Circuit (IC) chip through traces 002 of the pressure sensing electrode.
In the embodiment of the invention, when 003 corresponds to the FPC, that is, when the pressure sensing electrode 001 is directly connected to the FPC, the FPC may be connected to the driving chip of the entire touch display device; or, the FPC may be connected to an independent processing chip of the pressure signal to perform independent processing to obtain a processing result, and then the processing result is fed back to the driving chip of the entire touch display device by the independent processing chip.
In the top view architecture diagram shown in fig. 4a, the traces of the pressure-sensitive electrode portions 162 are arranged in the FPC, and may be connected by other means in the actual implementation of the present solution. For example, the traces of the pressure sensing electrode part 162 may be arranged on the conductive film layer.
The embodiment of the invention also provides a plurality of data line frameworks corresponding to the self-capacitance type pressure sensing electrode parts. Please refer to fig. 4b, which is a top view of a plurality of data lines corresponding to the self-contained pressure sensing electrode. A plurality of straight lines shown in fig. 4b, whose extending directions coincide, indicate the data lines 004.
As shown in fig. 4b, the touch display device further includes:
the driver chip 41, the driver chip 41 further includes a multiplexed signal output terminal 005, the multiplexed signal output terminal 005 is shown as a black dot in fig. 4b, and the driver chip 41 outputs the multiplexed signal through the multiplexed signal output terminal 005. Specifically, in the embodiment of the present invention, the multiplexing signal output terminal 005 is configured to output the multiplexing signal such that the data line 004 is multiplexed as the pressure driving electrode 161 in the pressure electrode 16 in the pressure sensing stage, and output the pressure driving signal, where the multiplexing signal output by the multiplexing signal output terminal 005 is the pressure driving signal.
The data line switching unit 42 is used to connect a plurality of data lines 004 (multiplexed into the pressure driving electrode section 161) and the multiplexed signal output terminal 005. That is, the driving chip 41 may output driving signals to the plurality of data lines 004 through the data line switching unit 42.
Specifically, the data line switching unit 42 is specifically configured to turn off the plurality of data lines 004 and the multiplexed signal output terminal 005 in the display phase, and to turn on the plurality of data lines 004 and the multiplexed signal output terminal 005 in the pressure sensing phase.
As shown in fig. 4b, the data lines 004 in the touch display device are connected to the driving chip 41 through the data line switching unit 42, in this case, the data lines 004 may not be divided into data line groups, and in the pressure sensing stage, the driving chip 41 may drive the data lines to transmit the same or different pressure driving signals to the data lines through the data line switching unit 42.
It is understood that, in the embodiment of the present invention, the architecture of the data line 004 as shown in fig. 4b is included in the thin film transistor array layer 13.
Specifically, based on the architecture of the self-contained pressure sensing electrode, the driving signal in the data line is used as the dc reference ground, so that when a user presses the touch display device with a finger or other touch object, the pressure signal sensed by the pressure sensing electrode corresponding to the pressing position changes. Based on the principle, the touch display device can determine a specific pressing position according to the pressure signal of each pressure sensing electrode.
In the second mode, the pressure sensing electrode 162 is a mutual capacitance structure.
Specifically, please refer to fig. 5a, which is a top view of the mutual capacitance type pressure sensing electrode. The rectangular hatched area in fig. 5a corresponds to the pressure-sensitive electrode 001, and as shown in fig. 5a, the pressure-sensitive electrode portion 162 includes a plurality of pressure-sensitive electrodes 001, and the plurality of pressure-sensitive electrodes 001 are arranged in parallel in an elongated shape.
As shown in fig. 5a, the connecting line connected between the pressure- sensitive electrodes 001 and 003 represents the trace 002 of the pressure-sensitive electrode, and the region corresponding to the trace 003 represents the FPC or IC.
As shown in fig. 5a, each pressure sensing electrode 001 is directly connected to an FPC or an IC through a trace 002 of the pressure sensing electrode. At this time, the components connected to the FPC, the arrangement of the traces 002 of the pressure-sensitive electrodes, and the like are similar to the structure shown in fig. 4a, and are not described again.
Based on the structure of the mutual capacitance type pressure sensing electrodes, when a user presses the touch display device with a finger or other touch object, the pressure signal sensed by the pressure sensing electrode corresponding to the touch position changes, but the specific pressing position cannot be determined specifically according to the structure shown in fig. 5a, and therefore, the specific pressing position needs to be determined in cooperation with the signal change of the data line.
Based on this, the embodiment of the invention provides a top view architecture diagram of a plurality of data lines corresponding to the mutual capacitance type pressure sensing electrode part. Please refer to fig. 5b, which is a top view of a plurality of data lines corresponding to the mutual capacitance type pressure sensing electrode. As shown in fig. 5b, the straight lines arranged in a row on the touch display device represent data lines 004, and a plurality of data lines 004 corresponding to a thick horizontal line represent a data line group 006.
As shown in fig. 5b, the touch display device further includes:
the driver chip 41, the driver chip 41 comprises n multiplexed signal outputs 005, the multiplexed signal outputs 005 being shown as black dots in fig. 5 b. The n multiplexed signal output terminals 005 may output the multiplexed signal in a time-sharing manner, where n is a positive integer, and the specific number denoted by n is not particularly limited in the embodiment of the present invention.
As shown in fig. 5b, the data lines 004 are distributed into n data line groups 006, each data line group 006 includes a plurality of data lines 004, one data line 004 at most belongs to one data line group 006, and the n data line groups 006 are in one-to-one correspondence with the n multiplexed signal outputs 005. In the embodiment of the present invention, the number of data lines 004 in each data line group 006 is not particularly limited, and in the course of actually implementing the present scheme, the data line groups 006 may be provided with the same number of data lines 004, or may be provided with different numbers of data lines 004. For example, the number of data lines 004 in each data line group 006 in fig. 5b is 5.
As shown in fig. 5b, the data line switching unit 42 are electrically connected to the n multiplexing signal output terminals 005 and the n data line groups 006. It can be understood that, at this time, the driving chip 41 may send n pressure driving signals to the n data line groups 006, and at this time, the pressure driving signals received by the data lines 004 in each data line group 006 are identical; the pressure driving signals received by the different data line groups 006 may be non-uniform.
Specifically, the data line switching unit 42 is specifically configured to turn off between n data line groups 006 and n multiplexed signal outputs 005 in the display phase, and to turn on between the multiplexed signal output 005 and the corresponding data line group 006 in the pressure sensing phase.
It should be noted that, in the embodiment of the present invention, the extending direction h1 of the pressure sensing electrode 001 shown in fig. 5a is perpendicular to the extending direction h2 of the data line 004 shown in fig. 5b, so that the pressing position can be determined by the detection signal at each orthogonal crossing position of the pressure sensing electrode 001 and the data line 004.
Hereinafter, the data line switching unit 42 according to the two architecture schemes proposed in the embodiments of the present invention will be specifically described.
First, in the embodiment of the present invention, the physical position where the data line switching unit 42 is located is not particularly limited.
For example, in practical applications, the data line switching unit 42 may be located on a panel of the touch display device.
Please refer to fig. 6, which is a top view structure diagram of the data line switching unit on the panel of the touch display device. As shown in fig. 6, the touch display device includes: in the display area AA and the peripheral area BB surrounding the display area, a plurality of data lines 004 extending in the same direction are arranged in the AA area. The lower area of the touch display device shown in fig. 6 is also connected to a driving chip 41 of the entire touch display device.
In the embodiment of the present invention, for the touch display device shown in fig. 6, the data line switching unit 42 may be disposed in the BB area. In some alternative implementations, for the convenience of holding by the user, the data line switching unit 42 may be disposed in the BB area on the lower side of the AA area close to the driving chip 41 (the structure shown in fig. 6), or the data line switching unit 42 may also be disposed in the BB area on the upper side of the AA area far from the driving chip 41, so as to achieve the effect of reducing the two side frames.
Alternatively, for another example, in an actual application process, the data line switching unit 42 may be located in the driving chip 41 of the touch display device.
Please refer to fig. 7, which is a top view structure diagram of the data line switching unit in the driving chip of the touch display device. As shown in fig. 7, the touch display device includes: in the display area AA and the peripheral area BB surrounding the display area, a plurality of data lines 004 extending in the same direction are arranged in the AA area. A driving chip 41 of the entire touch display device is further connected to a lower area of the touch display device as shown in fig. 7, and the driving chip 41 further includes: a data line switching unit 42.
For the touch display device as shown in fig. 7, the driving chip 41 transmits a driving signal to the corresponding component through the built-in data line switching unit 42.
Secondly, in the embodiment of the present invention, the driving chip 41 further includes: and a control signal output terminal 007 for outputting a switching control signal of the data line switching unit 42. Referring to fig. 6, the black dots in fig. 6 represent the driving signal output terminals 005, and the black squares in the figure represent the control signal output terminals 007.
When the data line switching unit 42 receives that the switch control signal output by the driving chip 41 through the control signal output terminal 007 is on, the on state can be maintained, and then, the transmission of the multiplexing signal output by the driving chip 41 to the data line 004 can be further realized; alternatively, when the data line switching unit 42 receives the switch control signal outputted from the driving chip 41 through the control signal output terminal 007 as off, the data line switching unit 42 is in an off state, and at this time, all the data lines 004 and the multiplexing signal output terminal 005 are turned off.
Third, the structure of the data line switching unit is specifically described below.
Please refer to fig. 8, which is a schematic structural diagram of a data line switching unit. As shown in fig. 8, the data line switching unit 42 includes a plurality of switching tubes 008.
Specifically, as shown in fig. 8, a control terminal of each switching tube 008 is connected to the control signal output terminal 007, a first terminal of the switching tube 008 is connected to the multiplexed signal output terminal 005, and a second terminal of the switching tube is connected to the data line 004 or the data line group 006.
As shown in fig. 8, the second terminals of the first to nth switching tubes 008 to 008 are connected to the data line 004. In an actual implementation of the present invention, the second terminal of the switching tube 008 may also be connected to the data line group 006 including a plurality of data lines, which is not particularly limited in the embodiment of the present invention.
It should be noted that, in the embodiment of the present invention, the lines in the data line switching unit 42 and the connection leads related to the data line switching unit 42 may be disposed on the gate metal layer or the source/drain metal layer according to actual needs, which is not particularly limited in the embodiment of the present invention.
The technical scheme of the embodiment of the invention has the following beneficial effects:
in the touch display device provided by the embodiment of the invention, on one hand, the common electrode can be multiplexed as a touch electrode to detect a touch signal, and on the other hand, a pressure sensing electrode part is added in the touch display device, and a plurality of multiplexed data lines are used as pressure driving electrode parts to form a complete pressure electrode part to detect the pressure signal; therefore, the detection of the pressure signal and the detection of the touch signal can be carried out separately, the two detection capacitors are independent in physical position and function, the pressure signal and the touch signal can be completely separated, and the phenomenon that the touch signal quantity is increased due to the fact that the pressure signal is superposed with the touch signal is avoided.
Based on the touch display device provided in the above embodiments, an embodiment of the present invention provides a driving method of a touch display device.
Specifically, the method is applied to a touch display device, and the touch display device comprises: a first substrate and a second substrate disposed opposite to the first substrate; the side of the first substrate close to the second substrate comprises: the thin film transistor array layer comprises a plurality of gate lines arranged in parallel and a plurality of data lines arranged in parallel, and the gate lines and the data lines are crossed and insulated to define a plurality of pixel units; the pixel electrode layer comprises a plurality of pixel electrodes, and the common electrode layer comprises a plurality of common electrodes arranged in an array; the common electrodes are reused as touch electrodes, and one touch electrode is electrically connected with at least one touch electrode wire and is insulated from the rest touch electrode wires; the touch display device further includes: a pressure electrode section including: the pressure driving electrode part and the pressure sensing electrode part are multiplexed by a plurality of data lines, the pressure sensing electrode part is positioned on one side of the first substrate far away from the second substrate, and the pressure sensing electrode part comprises at least one pressure sensing electrode.
The method comprises the following steps: the touch control system comprises a plurality of driving cycles, a touch control detection unit and a pressure sensing unit, wherein each driving cycle comprises a display stage, a touch control detection stage and a pressure sensing stage; in the display stage, a plurality of data lines output data signals; in the touch detection stage, the touch electrode outputs a touch sensing signal; in the pressure sensing stage, the plurality of data lines output pressure driving signals, and the pressure sensing electrodes output pressure sensing signals. In some optional implementations, the pressure sensing electrode part includes a plurality of pressure sensing electrodes, and the plurality of pressure sensing electrodes are distributed in a matrix; in the pressure sensing stage, a plurality of data lines output self-contained driving reference voltage, and pressure sensing electrodes output pressure sensing pulse signals.
In some optional implementations, the plurality of data lines includes n data line groups, each data line group includes a plurality of data lines, one data line belongs to at most one data line group, and n is a positive integer; the pressure sensing electrode part comprises a plurality of pressure sensing electrodes which are arranged in parallel in a strip shape, and the extending direction of the pressure sensing electrodes is vertical to the extending direction of the data lines; in the pressure sensing stage, n groups of data lines sequentially output mutual capacitance driving pulse signals, and the pressure sensing electrodes output pressure sensing pulse signals.
In the embodiment of the invention, in the touch detection stage, the touch electrode receives the touch driving signal, and the plurality of data lines output the touch driving signal or are grounded.
In the embodiment of the invention, the touch electrode is grounded in the pressure sensing stage.
In an actual application process, when the touch detection stage and the pressure sensing stage in the driving cycle are continuously executed, each driving cycle may further include: a buffering stage;
the buffer stage is positioned between the touch detection stage and the pressure induction stage; in the buffering stage, the touch electrode, the data lines and the pressure sensing electrodes are grounded.
In the embodiment of the invention, in the display stage, the pressure sensing electrodes are suspended or grounded.
To more specifically explain the present invention, the embodiments of the present invention respectively provide a driving method of the self-capacitance type architecture scheme and a driving method of the mutual-capacitance type architecture scheme.
The first driving method is suitable for the driving method of the touch display device with the self-contained pressure-sensing electrode part as shown in fig. 4a and 4 b.
Please refer to fig. 9, which is a schematic diagram of driving signals of a touch display device having a self-contained pressure sensing electrode. The driving signal diagram shown in fig. 9 is a signal diagram in one driving period.
Specifically, as shown in fig. 9, in each driving period, the method includes: a display stage T1, a touch detection stage T2, a buffer stage T3 and a pressure sensing stage T4.
As shown in fig. 9, the signals are, from top to bottom: a common electrode (multiplexed as a touch electrode) signal Vcom, a pressure sensing electrode signal Rx, a data line (multiplexed as a pressure driving electrode) signal Tx, a Switch control signal Switch of a data line switching unit, a high logic level VGH of a thin film transistor, and a low logic level VGL of the thin film transistor.
As shown in fig. 9, the dotted line portion of each signal corresponds to the 0V level of the signal, and the solid line portion of each signal is an actual drive signal or an actual detection signal.
Specifically, in the display period T1, as shown in fig. 9, the data lines output the data signal Tx, and at this time, the data lines are not multiplexed, and the data lines are normally charged, which is indicated by x in fig. 9. The common electrode Vcom outputs a common voltage, and the pressure-sensitive electrode signal Rx is Floating or grounded. At this time, the data line switching unit is in the non-on state, Switch is low level, and VGH level and VGL level are normally output.
Specifically, in the touch detection stage T2, as shown in fig. 9, the common electrode Vcom outputs a self-capacitance pulse signal, so that when it is not detected that the user's finger or other touch object touches the device, the driving chip can obtain a regular self-capacitance pulse signal; on the contrary, if a user finger or other touch object touches the device, the driving chip obtains a signal different from the self-capacitance pulse signal, and the specific touch position can be determined according to the changed touch signal.
In the touch detection stage T2, as shown in fig. 9, the traces of the data lines are connected, Tx outputs a touch driving signal or is grounded, and VGH level and VGL level output touch driving signals. The frequency of the touch driving signal Rx at this time is consistent with the frequency of the self-capacitance pulse signal output by the common electrode Vcom.
It should be noted that, as shown in fig. 9, in the touch detection stage, the Switch state of the data line switching unit is the on state, and the Switch is at the high level. And even if the pressure sensing electrode can sense a pressure signal in the touch detection stage, signal detection is not carried out.
As shown in fig. 9, the touch sensing stage T2 is followed by a buffering stage T3, and in the buffering stage T3, the touch electrode (common electrode), the plurality of data lines and the pressure sensing electrodes are all grounded.
Specifically, as shown in fig. 9, after the buffering period T3, a pressure sensing period T4 is performed, in which the data line signal Tx outputs a self-capacitance driving reference voltage and the pressure sensing electrode Rx outputs a pressure sensing pulse signal. The data line is used as a reference ground electrode in the pressure electrode portion, and the self-capacitance driving reference voltage may be a ground voltage, or may also be a preset specified reference voltage, which is not particularly limited in this embodiment of the present invention.
In the pressure sensing stage, as shown in fig. 9, the touch electrode signal Vcom is grounded, the switching state of the data line switching unit is a conducting state, Switch is a high level, and the VGH level and the VGL level output driving signals consistent with the frequency of the pressure sensing signal.
The second driving method is suitable for the driving method of the touch display device with the mutual capacitance type pressure sensing electrode part as shown in fig. 5a and 5 b.
Please refer to fig. 10, which is a schematic diagram of driving signals of a touch display device having a mutual capacitance type pressure sensing electrode portion. The driving signal diagram shown in fig. 10 is a signal diagram in one driving period.
Specifically, as shown in fig. 10, in each driving period, the method includes: a display stage T1, a touch detection stage T2, a buffer stage T3 and a pressure sensing stage T4.
As shown in fig. 10, the signals are, from top to bottom: a common electrode (multiplexed as a touch electrode) signal Vcom, a pressure sensing electrode signal Rx, a data line group signal Tx including a first data line group signal Tx1, a second data line group signal Tx2 … …, an nth data line group signal Txn, a Switch control signal Switch of a data line switching unit, a high logic level VGH level of a thin film transistor, and a low logic level VGL level of the thin film transistor.
As shown in fig. 10, the dotted line portion of each signal corresponds to the 0V level of the signal, and the solid line portion of each signal is an actual drive signal or an actual detection signal.
Specifically, in the display period T1, as shown in fig. 10, the data lines output the data signal Tx, and at this time, the data lines are not multiplexed, and the data lines are normally charged, which is indicated by x in fig. 10. The common electrode signal Vcom outputs a common voltage, and the pressure sensing electrode signal Rx is Floating or grounded. At this time, the data line switching unit is in the non-on state, Switch is low level, and VGH level and VGL level are normally output.
Specifically, in the touch detection stage T2, as shown in fig. 10, the common electrode outputs a mutual capacitance pulse signal, so that when no user's finger or other touch object is detected to touch the device, the driving chip can obtain a regular mutual capacitance pulse signal; on the contrary, if a user finger or other touch object touches the device, the driving chip obtains a signal different from the mutual capacitance pulse signal, and the specific touch position can be determined according to the changed touch signal.
In the touch detection stage T2, as shown in fig. 10, the traces of the data lines are connected, the driving data line signal Tx outputs a touch driving signal or is grounded, and the VGH level and the VGL level output touch driving signals. The frequency of the touch driving signal Tx at this time is consistent with the frequency of the capacitive pulse signal output by the common electrode.
As shown in fig. 10, in the touch detection period T2, the Switch state of the data line switching unit is on, and the Switch is high. And even if the pressure sensing electrode can sense a pressure signal in the touch detection stage, signal detection is not carried out.
As shown in fig. 10, the touch sensing stage T2 is followed by a buffering stage T3, and the touch electrodes, the data lines and the pressure sensing electrodes are all grounded in the buffering stage T3.
Specifically, as shown in fig. 10, the pressure sensing period T4 is performed after the buffering period T3. In the pressure sensing stage T4, the n groups of data lines sequentially output the mutual capacitance driving pulse signal, and the pressure sensing electrodes output the pressure sensing pulse signal.
In the pressure sensing period T4, as shown in fig. 10, the touch electrode Vcom is grounded, the switching state of the data line switching unit is the conducting state, Switch is the high level, and the VGH level and VGL level output the driving signal consistent with the frequency of the pressure sensing signal.
For the parts of the embodiments of the present invention not described in detail, please refer to the related description of the first embodiment.
The technical scheme of the embodiment of the invention has the following beneficial effects:
in the touch display device provided by the embodiment of the invention, on one hand, the common electrode can be multiplexed as a touch electrode to detect a touch signal, and on the other hand, a pressure sensing electrode part is added in the touch display device, and a plurality of multiplexed data lines are used as pressure driving electrode parts to form a complete pressure electrode part to detect the pressure signal; therefore, the detection of the pressure signal and the detection of the touch signal can be carried out separately, the two detection capacitors are independent in physical position and function, the pressure signal and the touch signal can be completely separated, and the phenomenon that the touch signal quantity is increased due to the fact that the pressure signal is superposed with the touch signal is avoided.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (11)
1. A touch display device, comprising:
a first substrate and a second substrate disposed opposite to the first substrate;
one side of the first substrate close to the second substrate comprises:
the thin film transistor array layer comprises a plurality of gate lines arranged in parallel and a plurality of data lines arranged in parallel, and the gate lines and the data lines are crossed and insulated to define a plurality of pixel units;
the pixel electrode layer comprises a plurality of pixel electrodes, and the common electrode layer comprises a plurality of common electrodes arranged in an array; the common electrodes are reused as touch electrodes, and one touch electrode is electrically connected with at least one touch electrode wire and is insulated from the rest touch electrode wires;
the touch display device further includes:
a pressure electrode section including: the data lines are multiplexed into the pressure driving electrode part, and the pressure sensing electrode part is positioned on one side of the first substrate, which is far away from the second substrate;
the pressure sensing electrode part comprises a plurality of pressure sensing electrodes which are distributed in a matrix manner, and in a pressure sensing stage, the plurality of data lines output self-capacitance driving reference voltage and the pressure sensing electrodes output pressure sensing pulse signals;
or, the plurality of data lines include n data line groups, each data line group includes a plurality of data lines, one data line belongs to at most one data line group, and n is a positive integer; the pressure sensing electrode part comprises a plurality of pressure sensing electrodes which are arranged in parallel in a strip shape, and the extending direction of the pressure sensing electrodes is vertical to the extending direction of the data lines; in the pressure sensing stage, the n groups of data lines sequentially output mutual capacitance driving pulse signals, and the pressure sensing electrodes output pressure sensing pulse signals.
2. The touch display device of claim 1,
the backlight module comprises an optical film material and a backlight supporting frame which are sequentially arranged in the direction away from the first substrate, and the pressure sensing electrode part is positioned between the optical film material and the backlight supporting frame.
3. The touch display device of claim 1,
a backlight module is arranged on one side of the first substrate, which is far away from the second substrate;
a whole machine middle frame is arranged on one side, away from the first substrate, of the backlight module, and a gap exists between the whole machine middle frame and the backlight module;
the pressure sensing electrode part is positioned on one side of the whole machine middle frame close to the first substrate and is adjacent to the whole machine middle frame.
4. The touch display device of claim 1, further comprising:
the driving chip comprises a multiplexing signal output end for outputting multiplexing signals;
and the data line switching unit is used for connecting the plurality of data lines and the multiplexing signal output end, and is used for stopping the connection between the plurality of data lines and the multiplexing signal output end in a display stage and conducting the connection between the plurality of data lines and the multiplexing signal output end in a pressure induction stage.
5. The touch display device of claim 1, further comprising:
the driving chip comprises n multiplexing signal output ends for outputting multiplexing signals in a time-sharing manner, and the n data line groups correspond to the n multiplexing signal output ends one to one; and the number of the first and second groups,
and the data line switching unit is electrically connected to the n multiplexing signal output ends and the n data line groups, and is used for stopping the connection between the n data line groups and the n multiplexing signal output ends in a display stage and conducting the connection between the multiplexing signal output ends and the corresponding data line groups in a pressure sensing stage, wherein n is a positive integer.
6. The touch display device of claim 4 or 5,
the driving chip also comprises a control signal output end which is used for outputting a switch control signal of the data line switching unit;
the data line switching unit comprises a plurality of switching tubes;
the control end of the switch tube is connected with the control signal output end;
the first end of the switch tube is connected with the multiplexing signal output end;
and the second end of the switching tube is connected with the data line.
7. A driving method of a touch display device, the touch display device comprising:
a first substrate and a second substrate disposed opposite to the first substrate;
one side of the first substrate close to the second substrate comprises:
the thin film transistor array layer comprises a plurality of gate lines arranged in parallel and a plurality of data lines arranged in parallel, and the gate lines and the data lines are crossed and insulated to define a plurality of pixel units;
the pixel electrode layer comprises a plurality of pixel electrodes, and the common electrode layer comprises a plurality of common electrodes arranged in an array; the common electrodes are reused as touch electrodes, and one touch electrode is electrically connected with at least one touch electrode wire and is insulated from the rest touch electrode wires;
the touch display device further includes:
a pressure electrode section including: the data lines are multiplexed into the pressure driving electrode part, and the pressure sensing electrode part is positioned on one side of the first substrate, which is far away from the second substrate;
the pressure sensing electrode part comprises a plurality of pressure sensing electrodes which are distributed in a matrix manner; or, the plurality of data lines include n data line groups, each data line group includes a plurality of data lines, one data line belongs to at most one data line group, and n is a positive integer; the pressure sensing electrode part comprises a plurality of pressure sensing electrodes which are arranged in parallel in a strip shape, and the extending direction of the pressure sensing electrodes is vertical to the extending direction of the data lines;
the method comprises the following steps: the touch control system comprises a plurality of driving cycles, a touch control unit and a touch control unit, wherein each driving cycle comprises a display stage, a touch control detection stage and a pressure induction stage;
in the display stage, the data lines output data signals;
in the touch detection stage, the touch electrode outputs a touch sensing signal;
in the pressure sensing stage, the data lines output self-capacitance driving reference voltage, the pressure sensing electrodes output pressure sensing pulse signals, or the n groups of data lines output mutual capacitance driving pulse signals in sequence, and the pressure sensing electrodes output pressure sensing pulse signals.
8. The method of claim 7,
in the touch detection stage, the touch electrode receives a touch driving signal;
the plurality of data lines output the touch driving signal or are grounded.
9. The method of claim 7,
in the pressure sensing stage, the touch electrode is grounded.
10. The method of claim 7,
when the touch detection stage and the pressure sensing stage are continuously executed in the driving cycle, each driving cycle further includes: a buffering stage;
the buffering stage is positioned between the touch detection stage and the pressure induction stage;
in the buffering stage, the touch electrode, the data lines and the pressure sensing electrodes are grounded.
11. The method of claim 7,
in the display stage, the pressure sensing electrodes are suspended or grounded.
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| CN107562283B (en) * | 2017-10-10 | 2020-12-04 | 厦门天马微电子有限公司 | Touch display panel, display device and driving method thereof |
| CN107817920B (en) * | 2017-10-31 | 2021-01-12 | 厦门天马微电子有限公司 | Pressure induction sensor driving circuit and driving method, display panel and device |
| JP6921978B2 (en) * | 2017-11-01 | 2021-08-18 | 株式会社ワコム | Position detection system and display device control circuit |
| CN109670466A (en) * | 2018-12-25 | 2019-04-23 | 厦门天马微电子有限公司 | Display panel and its driving method and display device |
| CN110794988B (en) * | 2019-10-22 | 2021-12-03 | 维沃移动通信有限公司 | Display module assembly and electronic equipment |
| CN113760114B (en) * | 2020-06-03 | 2024-03-01 | 京东方科技集团股份有限公司 | Touch panel, driving method thereof and display device |
| CN116153238A (en) * | 2022-12-21 | 2023-05-23 | 厦门天马微电子有限公司 | Display device and driving method thereof |
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