CN107066143B - Touch display panel, driving method thereof and touch display device - Google Patents
Touch display panel, driving method thereof and touch display device Download PDFInfo
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- CN107066143B CN107066143B CN201710058399.2A CN201710058399A CN107066143B CN 107066143 B CN107066143 B CN 107066143B CN 201710058399 A CN201710058399 A CN 201710058399A CN 107066143 B CN107066143 B CN 107066143B
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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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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
Abstract
The invention provides a touch display panel, a driving method thereof and a touch display device. And in the pressure touch control time sequence section, controlling the gating unit to be in a conducting state, wherein at the moment, each first electrode block in the same electrode block group is in an electrically connected state, so that the capacitance value of the first electrode block group is equal to the sum of the capacitance values of the first electrode blocks in the group. When the touch display screen is pressed by a finger, the control chip scans each first electrode block group due to the conduction of the gating unit. At this time, the capacitance value of the first electrode block group detected by the pressure sensor is greater than the capacitance value of the original first electrode block, so that the semaphore of the pressure signal acquired by the pressure sensor is increased.
Description
Technical Field
The invention relates to the technical field of display, in particular to a touch display panel, a driving method thereof and a touch display device.
Background
With the continuous development of technology, touch display devices have become a part of daily life. Generally, referring to fig. 1, a touch display device includes a touch display screen 101, a pressure sensor 102, and a control chip 103. After the pressure of the finger is sensed on the touch display screen 101, the deformation quantity detected on the touch display screen 101 is converted into different electrical signals, then the pressure sensor 102 receives the electrical signals and transmits the processed signals to the control chip 103, the control chip 103 generates corresponding instructions, and then the touch display screen displays the actions of the corresponding instructions.
Specifically, when the finger presses the touch display screen 101 with force, the contact area between the finger and the touch display screen 101 is larger than the contact area between the finger and the touch display screen 101 when the finger touches the touch display screen 101, and the deformation amount of the touch display screen 101 is also larger, so that the touch display screen 101 divides the pressure signal into different levels, such as light point, light pressure, heavy pressure, and the like, according to the contact area and the deformation amount of the finger.
However, the inventor finds that the current touch display device has a small signal amount of the pressure signal due to the limitation of the structural deformation amount of the touch display screen, which is not favorable for the receiving of the pressure sensor. Therefore, how to provide a liquid crystal display panel to increase the signal amount of the pressure signal of the touch display device is a major technical problem to be solved at present.
Disclosure of Invention
In view of the above, the present invention provides a touch display panel, a driving method thereof and a touch display device, so as to increase the semaphore of a pressure signal of the touch display device.
In order to achieve the purpose, the invention provides the following technical scheme:
an array substrate is provided with a plurality of first electrodes,
the common electrode layer is arranged on the array substrate; the common electrode layer comprises first electrode block groups which are arranged in an array mode, and each first electrode block group comprises at least two adjacent first electrode blocks;
a second electrode layer including a plurality of second electrodes disposed opposite to the first electrode blocks;
the gating circuit comprises a plurality of gating units and pressure touch signal lines, wherein the gating units correspond to the first electrode block groups one by one; the gating unit is electrically connected with the at least two adjacent first electrode blocks in the corresponding first electrode block group through the pressure touch signal line;
and in the pressure touch control time sequence section, the gating unit is in a conducting state.
A touch display device comprises the touch display panel.
A driving method of a touch display panel is based on the touch display panel and comprises the following steps:
and in the pressure touch control time sequence section, the gating unit is in a conducting state, the control chip simultaneously outputs pressure touch control scanning signals to the first electrode blocks in any first electrode block group through the gating unit, and the second electrode receives the first signals output by the control chip.
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
according to the touch display panel provided by the invention, the common electrode layer is arranged on the array substrate, the first electrode blocks in the common electrode layer are grouped to form a plurality of first electrode block groups, then the first electrode blocks in the same group are electrically connected with the same gating unit through the pressure touch signal line, and meanwhile, a plurality of second electrodes which are arranged opposite to the first electrode blocks are arranged on the second electrode layer. And controlling the gating unit to be in a conducting state in a pressure touch control time sequence section. At this time, since the gate unit is turned on, the first electrode blocks in the same electrode block group are electrically connected, so that the capacitance of the first electrode block group is equal to the sum of the capacitances of the first electrode blocks in the group. When the touch display screen is pressed by a finger, the control chip scans each first electrode block group due to the conduction of the gating unit. At this time, the capacitance value of the first electrode block group detected by the pressure sensor is greater than the capacitance value of the original first electrode block, so that the semaphore of the pressure signal acquired by the pressure sensor is increased.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a touch display device in the prior art;
fig. 2 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another touch display panel according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another touch display panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another touch display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another touch display panel according to an embodiment of the present invention;
fig. 7 is a timing diagram of a driving method of a touch display panel according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a touch display panel, a driving method thereof and a touch display device. And in the pressure touch control time sequence section, controlling the gating unit to be in a conducting state, wherein at the moment, each first electrode block in the same electrode block group is in an electrically connected state, so that the capacitance value of the first electrode block group is equal to the sum of the capacitance values of the first electrode blocks in the group. When the touch display screen is pressed by a finger, the control chip scans each first electrode block group due to the conduction of the gating unit. At this time, the capacitance value of the first electrode block group detected by the pressure sensor is greater than the capacitance value of the original first electrode block, so that the semaphore of the pressure signal acquired by the pressure sensor is increased.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention, where the touch display panel includes: the array substrate 10, the common electrode layer 20, the gate circuit 30 and the second electrode layer 40.
The common electrode layer 20 is disposed on the array substrate 10. The common electrode layer 20 includes first electrode block groups 201 arranged in an array, and the first electrode block groups 201 include at least two adjacent first electrode blocks 202. The gating circuit 30 includes a plurality of gating units 301 and a pressure touch signal line 302. Moreover, the plurality of gating units 301 correspond to the plurality of first electrode block groups 201 one to one. The second electrode layer 40 includes a plurality of second electrodes (not shown) disposed opposite the first electrode blocks 202.
Specifically, the first electrode block set 201 shown in the figure may include first electrode block sets 201a, 201b, and 201 c. In the present embodiment, the number of the first electrode blocks 202 included in the first electrode block group 201 is not limited, for example, the first electrode block group 201a may include a total of two first electrode blocks, wherein the two electrode blocks are adjacent. The first electrode block group 201b may include a total of four first electrode blocks, with any two electrode blocks within the group being adjacent.
Of course, the first electrode block set 201 may also include a number other than the number of first electrode blocks shown in the figure, for example, the first electrode block set 201 includes 3 first electrode blocks 202, or includes 7 first electrode blocks 202, or the first electrode block set 201 includes any other number of first electrode blocks 202. That is, the dividing manner of the first electrode block group 201 may be adjusted according to the specific design requirement of the designer, and this embodiment is not exhaustive.
In addition, in the present embodiment, each first electrode block group 201 corresponds to one gating cell 301. If the gate unit 301a is connected to the first electrode block set 201a, the gate unit 301b is connected to the first electrode block set 201 b. Specifically, the gating circuit 30 includes a plurality of pressure touch signal lines 302 in addition to the plurality of gating units 301. Each gating unit 301 is electrically connected to the at least two adjacent first electrode blocks 202 in the corresponding first electrode block group 201 through a plurality of pressure touch signal lines 302. For example, the first electrode block set 201a includes two first electrode blocks, the gating unit 301a corresponding to the first electrode block set 201a needs to be connected to the two first electrode blocks in the first electrode block set 201 through the two pressure touch signal lines 302.
In this way, the number of the first electrode blocks 202 included in the first electrode block group 201, the gating unit 301 corresponding to the first electrode block group 201 needs at least more pressure touch signal lines 302 to be connected to the first electrode blocks 202 in the first electrode block group 201.
It should be noted that, in the present embodiment, it is preferable to divide the adjacent first electrode blocks 202 into the same first electrode block group 201, which facilitates the wiring when connecting with the gate unit 301. For example, two first electrode blocks in the first electrode block group 201a are adjacent to each other, when one of the first electrode blocks is connected to the gating unit 301a through the pressure touch signal line and the other first electrode block is connected to the gating unit through the pressure touch signal line, the two pressure touch signal lines may be directly adjacent to each other and arranged side by side, and the two pressure touch signal lines do not cross with the other pressure touch signal lines.
However, the embodiment of the present invention does not limit the specific adjacent position relationship of the first electrode blocks 202 in the first electrode block group 201, and only limits that at least two first electrode blocks are adjacent in the first electrode block group 201. For example, the first electrode block set 201 may be that illustrated in the first electrode block set 201a in fig. 2: the first electrode blocks are adjacent to each other in the extending direction of the pressure touch signal line 302. It is also possible that a part of the first electrode blocks as shown in the first electrode block group 201b are adjacent along the extending direction of the pressure touch signal line 302, or a part of the first electrode blocks are adjacent along the X-axis direction in the figure.
In addition, based on the dividing manner of the first electrode block set 201 and the connection relationship between the first electrode block set 201 and the gating unit 301, the touch display panel provided in this embodiment controls the gating unit 301 to be in the conducting state during the pressure touch timing period. At this time, since the gate unit 301 is turned on, the first electrode blocks 202 in the same electrode block group 201 are in an electrically connected state, that is, two first electrode blocks in the first electrode block group 201a are electrically connected, four first electrode blocks in the first electrode block group 201b are electrically connected, two first electrode blocks in the first electrode block group 201c are electrically connected, and the like.
Then, at this time, the capacitance value of the first electrode block group 201 is equal to the sum of the capacitance values of the first electrode blocks 202 in the group. The working principle of the touch display panel provided in this embodiment is described with reference to a specific example, as follows:
referring to fig. 3, fig. 3 is a schematic structural diagram of a touch display panel provided in this embodiment, when a finger presses the touch display screen 101, since a gating unit is turned on (not shown in the figure), when a control chip scans each first electrode block 202, each first electrode block group 201 is actually scanned by taking a group as a unit, it should be noted that in this embodiment, the first electrode blocks 202 in the same first electrode block group 201 are filled with the same pattern, that is, in this embodiment, the first electrode blocks with the same filling pattern are in the same group and connected to the same gating unit.
Specifically, when a finger presses any position in the first electrode block set 201b on the touch display screen 101, the pressure sensor detects the capacitance value of the first electrode block set 201b, and the capacitance value of the first electrode block set 201b can be calculated by a formula
The calculation result is that S is the area of the first electrode block group 201b (the sum of the areas of the first electrode blocks in the group), d is the distance between the first electrode block and the second electrode, and epsilon, pi and k are constants, and it is easy to find according to the formula that the capacitance C of the first electrode block is proportional to S/d.
It can be seen that, when the deformation d of the touch display screen is the same, in the embodiment of the present disclosure, after the first electrode blocks of the touch display panel are electrically connected in groups, the area of the first electrode block group detected by the first electrode blocks is increased (the electrode area of the first electrode block group is certainly larger than the area of any first electrode block in the group), so that the capacitance value detected by the pressure sensor is also increased, and the purpose of increasing the signal amount of the pressure signal is achieved.
On the basis of the above embodiments, as shown in fig. 4, the touch display panel provided in this embodiment further includes a control chip 103. It should be noted that the touch display panel provided in this embodiment includes three timing stages, which are respectively: the display time sequence section, the touch control time sequence section and the pressure touch control time sequence section.
When the control chip 103 sends a scanning signal, specifically, the gating unit scans a plurality of first electrode block groups, that is, all the first electrode blocks in the first electrode block groups are scanned simultaneously, the second electrode receives a first signal output by the control chip, and at this time, the first signal is a reference signal, for example, a ground signal. And then comparing the output scanning signal with the received scanning signal to detect the pressure touch.
In the touch control sequence segment, the gating unit 30 is controlled to be in a disconnected state, at this time, each first electrode block is independent, when the control chip 103 sends out a scanning signal, each first electrode block is scanned respectively, and then the output scanning signal and the received scanning signal are compared to perform touch control detection.
Specifically, when the control chip 103 scans each first electrode block, it may output a touch scanning signal to each first electrode block and receive the touch scanning signal fed back by the first electrode block through a plurality of touch signal lines SX.
If the touch display screen 101 includes a plurality of first electrode blocks, at least the same number of touch signal lines SX are required to correspond to the first electrode blocks one to one, and each first electrode block is electrically connected to the control chip through at least one touch signal line.
In the display time sequence, the control chip 103 outputs a common voltage signal to the first electrode block through the touch signal line SX, so as to provide a display voltage for the touch display panel.
Optionally, this embodiment further provides a specific implementation structure of the gating unit, and as shown in fig. 5, the gating unit 301 includes a plurality of switching tubes.
The first poles of the switching tubes included in the same gating unit are electrically connected with the first electrode blocks in the same first electrode block group; and the second pole of the switch tube included in the same gating unit is electrically connected with the same pin of the control chip. And the control ends of the switch tubes are connected with each other and are electrically connected with one pin of the control chip.
Specifically, in fig. 5, the gating unit 301a includes two switching tubes, a first pole of one switching tube is connected to the first electrode block in the first electrode block set 201a through a pressure touch signal line, a first pole of another switching tube in the gating unit 301a is connected to another first electrode block in the first electrode block set 201a through a pressure touch signal line, and second poles of the two switching tubes in the gating unit 301a are connected to each other and both connected to the same pin TX1 of the control chip 103.
Similarly, the gating unit 301b includes four switching tubes, a first pole of one switching tube is connected to one first electrode block in the first electrode block set 201b through a pressure touch signal line, a first pole of another switching tube in the gating unit 301b is connected to another first electrode block in the first electrode block set 201b through a pressure touch signal line, and second poles of the four switching tubes in the gating unit 301b are all connected to the same pin TX2 of the control chip 103.
Besides, the control terminals of the switch tubes in different gating units are all connected to one pin SW of the control chip 103TXAnd (6) electrically connecting. As can be seen, pin SW of control chip 103TXThe output signals of the gating units control the on and off states of the switching tubes in the gating units at the same time, namely the switching tubes in the gating units are simultaneously on or simultaneously off. This also ensures that during the pressure touch control time sequence, the switching tubes in the control gating unit are simultaneously conducted, and when signal scanning is performed, the first electrode block group is scanned, and the electrode area of the first electrode block group is larger than the area of each first electrode block, i.e. the capacitance is increased, so that the pressure transmission is realizedThe magnitude of the pressure signal acquired by the sensor also increases. And at the touch control time sequence section, the pin SW of the control chip 103TXThe output signal controls the switching tubes in the gating units to be turned off simultaneously, so that each first electrode block is scanned when signal scanning is carried out, and accurate positioning of touch actions can be realized.
It should be noted that, in this embodiment, when the touch display panel is in the display timing section, the on or off state of the gating unit 301 is not limited in this embodiment. When the gating unit 301 is turned off, the control chip 103 inputs a common voltage signal to each first electrode block through the touch signal line SX to provide a display voltage for the touch display panel. Of course, in this embodiment, it is preferable that when the touch display panel is in the display timing sequence, the switch tubes in the gating unit 301 are all controlled to be turned on, and at this time, the control chip 103 inputs a common voltage signal to each first electrode block through the touch signal line SX, and the control chip 103 may also simultaneously input a common voltage signal to each first electrode block through the gating unit 301, so that each first electrode block can simultaneously load the common voltage signal twice, thereby avoiding the problem of uneven display of the touch display panel caused by uneven common voltage signal generated when the common voltage signal is input to each first electrode block only through the touch signal line SX
In addition, as shown in fig. 6, the touch display panel provided in this embodiment further includes a backlight module 104, wherein the second electrode may be disposed on the backlight module 104, and the second electrode is electrically connected to the control chip.
The second electrode is combined with the first electrode block to form a capacitor, and the deformation of the touch display screen is detected, namely the change of the distance between the first electrode block and the second electrode is detected. Specifically, in the display time sequence section and the pressure touch control time sequence section, the second electrode receives a first signal output by the control chip. And in a touch control time sequence section, the second electrode receives the touch control scanning signal output by the control chip.
Specifically, with reference to the driving sequence shown in fig. 7, a driving method of the touch display panel provided in this embodiment is described, where the driving method needs to be based on the touch display panel provided in the foregoing embodiment, as follows:
at a pressure touch control time period T3, the gating unit is in a conducting state, the control chip outputs a pressure touch control scanning signal to the first electrode block in any one of the first electrode block groups through the gating unit, the second electrode receives a first signal output by the control chip, and at this stage, the first signal may be a GND signal in the timing diagram.
In the touch timing segment (T2a, T2b, … …, T2n), the gate unit is in an off state, the control chip outputs a touch scanning signal (corresponding to the square wave signal portion output by SX in the figure) to the first electrode block through the touch signal line SX, the second electrode receives the first signal output by the control chip, and at this stage, the first signal is the touch scanning signal, for example, the first signal is the square wave signal portion in the timing diagram.
In a display time sequence (T1a, T1b, … …, T1n), the control chip outputs a common voltage signal to the first electrode block through the touch signal line SX, and the second electrode receives a first signal output by the control chip.
In addition, in the display timing section provided in the present embodiment, the control signal of the gate unit, i.e., SWTXAnd if the voltage is high level VGH, the gating unit is in a conducting state at the moment, and the control chip outputs a common voltage signal to the first electrode block through the gating unit.
It should be noted that, in this embodiment, the switch tubes in the gating unit are all N-type transistors, and when the input signal of the control end thereof (pin SW of the control chip 103)TXOutput signal of) is high level, the gating unit is turned on. Of course, the switch tube in the gating unit may also be a P-type transistor, and then, an input signal of the control end thereof (pin SW of the control chip 103) is requiredTXOutput signal of) is low level, the gating unit is turned on, and the gating unit is turned off at high level.
In combination with the above timing relationship, it can be seen that the driving method provided in this embodiment enables the touch display panel to be temporally separated and independent from each other in the display timing segment, the touch timing segment and the pressure touch timing segment, and the display timing segment and the touch timing segment are alternately executed, as shown in fig. 7, the display is performed in the display timing segment T1a, the touch detection is performed in the touch timing segment T2a, the display is performed in the display timing segment T1b, and the touch detection is performed in the touch timing segment T2b, so as to perform a cycle.
Specifically, in the display timing section (T1a, T1b, … …, T1n), the pin SW of the control chipTXThe output signal of (1) is a high level VGH, and the gate unit is turned on at this time, that is, all the touch signal lines SX independently output the common voltage signal VCOM to the first electrode block, and the pressure touch signal line TX also outputs the common voltage signal VCOM to the first electrode block, at this time, the second electrode is connected to the first signal, at this time, the first signal outputs any reference signal, for example, the reference signal may be the ground signal GND. It can be seen that the first electrode block independently receives the common voltage signal VCOM twice, which improves the problem of picture non-uniformity due to the single-side input common voltage signal VCOM.
In the touch timing period (T2a, T2b, … …, T2n), all the touch signal lines SX output touch scan signals, and the touch signal lines SX receive the returned touch scan signals, i.e., the touch signal lines SX are self-receiving, at this time, the pressure touch signal line TX may output a common voltage signal VCOM voltage, and the second electrode receives a first signal, which is the same signal as the touch scan signal output by the touch signal lines SX. It should be noted that, at this time, the pin SW of the chip is controlledTXThe voltage level VGL is low, and therefore, what kind of signal the pressure touch signal line TX outputs is acceptable, because the gate unit is in the off state, and the first electrode block cannot be input through the gate unit no matter what signal the pressure touch signal line TX outputs. In this embodiment, the pressure touch signal line TX is preferentially output with the common voltage signal VCOM, because the common voltage signal VCOM needs to be output in the display period, and when the touch signal line TX is in the touch timing period, the control method of the pressure touch signal line TX does not need to be changed, thereby simplifying the control operation.
Controlling the pin SW of the chip during the pressure touch control period T3TXThe voltage level is VGH, therefore, the gate unit is turned on, and each first electrode block receives the pressure touch scanning signal output through the pressure touch signal line TX in the form of the first electrode block group, and the second electrode receives the first signal (such as GND signal) output by the control chip. At this time, the first electrode block groups are scanned, the control chip sends scanning signals to the first electrode block groups and receives the scanning signals fed back by the first electrode block groups, and when the scanning signals change, the first electrode block groups corresponding to the scanning signals are determined to be deformed. Meanwhile, the touch signal line SX provided in this embodiment may further receive a feedback scanning signal, and compare the scanning signal with a scanning signal received by the pressure touch signal line TX through the control chip, if the scanning signal is the same as the scanning signal received by the pressure touch signal line TX, it may be determined that the corresponding first electrode block group is deformed, and if the scanning signal is different from the scanning signal received by the pressure touch signal line TX, it is determined that the data signal fails, that is, the scanning signal received by the pressure touch signal line TX may be mutually corrected with the scanning data received by the touch signal line SX, so as to improve the accuracy of the pressure semaphore.
It should be noted that, in different time periods, the signals output by the same signal terminal may be different, for example, the signal output by the touch signal line SX in the display time period is the common voltage signal VCOM, and in the touch time period, the signal output is the touch scan signal, such as the square wave signal in the figure. For another example, the signal output by the first signal in the display timing period is a reference signal, such as a ground signal GND, and the signal output by the first signal in the touch timing period is the same signal as the touch scanning signal output by the touch signal line SX, such as a square wave signal in the figure.
In addition, the present embodiment also provides a touch display device, including the touch display panel.
In summary, the present invention provides a touch display panel, a driving method thereof, and a touch display device, in which a common electrode layer is disposed on an array substrate, and first electrode blocks in the common electrode layer are grouped to form a plurality of first electrode block groups, then the first electrode blocks in the same group are electrically connected to the same gate unit through a pressure touch signal line, and a plurality of second electrodes disposed opposite to the first electrode blocks are disposed on a second electrode layer. And in the pressure touch control time sequence section, controlling the gating unit to be in a conducting state, wherein at the moment, as the gating unit is conducted, each first electrode block in the same electrode block group is in an electrically connected state, so that the capacitance value of the first electrode block group is equal to the sum of the capacitance values of the first electrode blocks in the group. When the touch display screen is pressed by a finger, the control chip scans each first electrode block group due to the conduction of the gating unit. At this time, the capacitance value of the first electrode block group detected by the pressure sensor is greater than the capacitance value of the original first electrode block, so that the semaphore of the pressure signal acquired by the pressure sensor is increased.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A touch display panel, comprising:
the array substrate comprises a display area and a non-display area positioned on one side of the display area;
the common electrode layer is arranged on the array substrate; the common electrode layer comprises first electrode block groups which are arranged in the display area in an array mode, each first electrode block group comprises at least two adjacent first electrode blocks, and the adjacent first electrode blocks are insulated from each other;
a second electrode layer including a plurality of second electrodes disposed opposite to the first electrode blocks;
the gating circuit comprises a plurality of gating units positioned in the non-display area and pressure touch signal lines penetrating through the display area and the non-display area, wherein the gating units correspond to the first electrode block groups one by one; at least two adjacent first electrode blocks are electrically connected with the signal output end of the corresponding gating unit through different pressure touch signal lines, and the signal input end of the gating unit is electrically connected with the control chip;
in the pressure touch control time sequence section, the gating unit is in a conducting state, and the control chip scans the first electrode blocks in the first electrode block group through the gating unit simultaneously.
2. The touch display panel of claim 1, wherein:
in the touch control time sequence section, the gating unit is in a disconnected state; and the control chip respectively scans the first electrode blocks and performs touch detection.
3. The touch display panel of claim 2, wherein the gating unit comprises a plurality of switching tubes;
a first pole of the switching tube included in the same gating unit is electrically connected with the first electrode block in the same first electrode block group; the second pole of the switch tube included in the same gating unit is electrically connected with the same pin of the control chip;
and the control ends of the switch tubes are connected with each other and are electrically connected with one pin of the control chip.
4. The touch display panel according to claim 2, further comprising a touch signal line, wherein the first electrode block is electrically connected to the control chip through the touch signal line;
the control chip simultaneously outputs a common voltage signal to the first electrode block through the touch signal line;
and in the touch control time sequence section, the control chip respectively outputs touch control scanning signals to the first electrode block through the touch control signal lines.
5. The touch display panel according to claim 4, further comprising a backlight module, wherein the second electrode is disposed on the backlight module and electrically connected to the control chip;
the second electrode receives a first signal output by the control chip;
and in the touch control time sequence section, the second electrode receives the touch control scanning signal output by the control chip.
6. Touch display device comprising a touch display panel according to claims 1-5.
7. A driving method of a touch display panel based on the touch display panel of claim 5,
and in the pressure touch control time sequence section, the gating unit is in a conducting state, the control chip simultaneously outputs pressure touch control scanning signals to the first electrode blocks in any first electrode block group through the gating unit, and the second electrode receives the first signals output by the control chip.
8. The driving method of the touch display panel according to claim 7, further comprising:
in the touch control time sequence section, the gating unit is in a disconnected state, the control chip respectively outputs touch control scanning signals to the first electrode blocks through the touch control signal lines, and the second electrode receives the touch control scanning signals output by the control chip.
9. The driving method of the touch display panel according to claim 8, further comprising:
and in the display time sequence section, the control chip outputs a common voltage signal to the first electrode block through the touch signal line, and the second electrode receives a first signal output by the control chip.
10. The driving method of the touch display panel according to claim 9, further comprising:
and in the display time sequence section, the gating unit is in a conducting state, and the control chip simultaneously outputs a common voltage signal to the first electrode block through the gating unit.
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| CN107562277B (en) * | 2017-09-08 | 2020-08-14 | 信利光电股份有限公司 | Touch screen with pressure detection function and electronic equipment |
| 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 |
| CN108196716B (en) * | 2018-01-04 | 2020-08-28 | 厦门天马微电子有限公司 | Display panel, display device and display panel control method |
| CN108534921B (en) * | 2018-03-26 | 2021-01-26 | 京东方科技集团股份有限公司 | Pressure sensor and display device |
| GB2574589B (en) * | 2018-06-06 | 2020-12-23 | Cambridge Touch Tech Ltd | Pressure sensing apparatus and method |
| CN112379791B (en) * | 2020-11-09 | 2024-02-09 | 厦门天马微电子有限公司 | Display device and power driving device |
| TWI780748B (en) * | 2021-06-07 | 2022-10-11 | 力領科技股份有限公司 | Driving method of force touch and touch display system thereof |
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| CN105843451B (en) * | 2016-04-26 | 2019-02-12 | 京东方科技集团股份有限公司 | Pressure-sensitive touch screen and its driving method, color membrane substrates |
| CN105759483B (en) * | 2016-05-13 | 2023-09-29 | 京东方科技集团股份有限公司 | Liquid crystal display panel, liquid crystal display and driving method thereof |
| CN105975140B (en) * | 2016-05-24 | 2019-01-11 | 厦门天马微电子有限公司 | Touch device and its driving method, touch control display apparatus and its driving method |
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