CN107203295B - Touch display panel, display device and driving method thereof - Google Patents
Touch display panel, display device and driving method thereof Download PDFInfo
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- CN107203295B CN107203295B CN201710378767.1A CN201710378767A CN107203295B CN 107203295 B CN107203295 B CN 107203295B CN 201710378767 A CN201710378767 A CN 201710378767A CN 107203295 B CN107203295 B CN 107203295B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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Abstract
The embodiment of the invention provides a touch display panel, a display device and a driving method thereof, relates to the technical field of display, and aims to reduce power consumption and improve scanning efficiency. The touch display panel comprises N touch areas, and M pressure touch electrodes are arranged in each touch area; the driving circuit comprises M multi-path gating circuits, and each multi-path gating circuit comprises N output ends and an input end; an ith output end of each multi-path gating circuit is connected with the pressure touch electrode in an ith touch area; the jth pressure touch electrode in each touch area is connected with a jth multi-channel gating circuit; the input end is connected with the driving end of the driving circuit; wherein i is less than or equal to N, j is less than or equal to M, and both N and M are natural numbers greater than or equal to 1. The touch display panel is suitable for a display device.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display equipment, in particular to a touch display panel, a display device and a driving method of the display device.
[ background of the invention ]
With the rapid development of touch technology, various touch devices bring convenience to the life of users. The existing touch device comprises a plurality of pressure touch electrodes and signal lines which are connected with the pressure touch electrodes in a one-to-one correspondence mode, wherein the signal lines are used for transmitting touch scanning signals; the touch-control driving circuit also comprises a touch-control driving chip connected with the signal wire, and the touch-control driving chip can be integrated in an IC (integrated circuit) driving circuit.
As the size of the touch device increases, the number of the pressure touch electrodes and the number of the corresponding signal lines increase, and the signal lines occupy more driving ports in the IC driving circuit, for example, 540 signal lines, which require the IC driving circuit to provide 540 ports, so that the port resources are not effectively released; more seriously, when the user performs the pressure touch operation, all pressure touch electrodes in the touch device need to be scanned in order to obtain the degree of pressure of the user.
Then, scanning all the pressure touch electrodes not only increases power consumption, but also makes the scanning cycle long and the scanning efficiency low.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a touch display panel, a display device and a driving method thereof, so as to solve the problems of long scanning period and low scanning efficiency in the prior art.
In a first aspect, the present invention provides a touch display panel, where the touch display panel includes N touch areas, and each touch area is provided with M pressure touch electrodes;
the driving circuit comprises M multi-path gating circuits, and each multi-path gating circuit comprises N output ends and an input end;
an ith output end of each multi-path gating circuit is connected with the pressure touch electrode in an ith touch area; the jth pressure touch electrode in each touch area is connected with a jth multi-channel gating circuit; the input end is connected with the driving end of the driving circuit;
wherein i is less than or equal to N, j is less than or equal to M, and both N and M are natural numbers greater than or equal to 1.
Optionally, the pressure touch electrodes in each touch area are arranged in an a-row-B-column array;
wherein, A is more than or equal to 1 and less than or equal to M, B is more than or equal to 1 and less than or equal to M, and M is a natural number more than or equal to 1.
Optionally, the jth multiplexer circuit includes M switches, each of the switches including an input terminal and an output terminal;
the jth pressure touch electrode in each touch area is connected with the output end of one switch in the jth multi-path gating circuit; the input ends of the M switches are connected with the driving end;
wherein j is less than or equal to M, and M is a natural number greater than or equal to 1.
Optionally, each switch further comprises a control terminal;
the control end of the a-th switch in each multi-way gating circuit is connected to the same control line;
wherein a is less than or equal to M, and M is a natural number greater than or equal to 1.
Optionally, the jth multi-channel gating circuit includes k stages of switch groups, each stage of switch group including one input terminal and two output terminals;
a first output end of the x-th level switch group is connected to an input end of the x-1 th level switch group, and a second output end of the x-th level switch group is connected to a jth pressure touch electrode in an x +1 th touch area; a first output end and a second output end of the 1 st-level switch group are respectively and correspondingly connected to the jth pressure touch electrode in the 1 st touch area and the 2 nd touch area;
wherein x is more than or equal to 2 and less than or equal to M-1, j is less than or equal to M, and M is a natural number which is more than or equal to 1.
Optionally, the switch group further includes two control terminals, the first control terminal is connected to the first output terminal, and the second control terminal is connected to the second output terminal;
the control ends of the switch groups of the same grade are connected to the same control line.
Optionally, the first control end of the switch group is an N-type thin film transistor, and the second control end is a P-type thin film transistor;
or the second control end of the switch group is an N-type thin film transistor, and the first control end is a P-type thin film transistor.
Optionally, when x is 2, that is, the jth multi-channel gating circuit includes a 2-stage switch group, a first output terminal of the 1-stage switch group is connected to the jth pressure touch electrode in the 1 st touch region, a second output terminal of the 1-stage switch group is connected to the jth pressure touch electrode in the 2 nd touch region, a first output terminal of the 2-stage switch group is connected to an input terminal of the 1-stage switch group, and a second output terminal of the 2-stage switch group is connected to the jth pressure touch electrode in the 3 rd touch region.
Optionally, the touch display panel further includes a plurality of sensing touch electrodes, where the sensing touch electrodes are used for sensing a touch position of a user;
and determining a touch area where the pressure touch electrode is located according to the touch position sensed by the induction touch electrode.
Optionally, the pressure touch electrode is reused as an induction touch electrode in a position touch time period, and is used for inducing a touch position of a user;
the pressure touch electrode is used for detecting the touch strength of a user in a pressure touch time period;
and determining a touch area where the pressure touch electrode is located according to the touch position sensed by the induction touch electrode.
Optionally, the pressure touch electrode is reused as a common electrode in a display time period, and receives a common voltage signal.
One of the above technical solutions has the following beneficial effects:
as can be seen from the touch display panel, in the scanning process, only the pressure touch electrodes in the corresponding touch area (the touch area where the touch position is located) are scanned in a targeted manner, and the rest touch areas are not scanned, so that compared with the prior art in which the pressing force of the user is obtained by scanning all the pressure touch electrodes on the touch display panel, the number of the pressure touch electrodes scanned in the embodiment is relatively small, so that the power consumption is small, the scanning period is short, and the scanning efficiency is significantly improved. In addition, each multi-path gating circuit is connected with the driving end through only one input end, so that the using number of ports in the driving circuit is reduced, and further, the occupied space of the ports is reduced.
In a second aspect, the present invention provides a display device including the touch display panel according to the first aspect of the present invention.
One of the above technical solutions has the following beneficial effects:
in the process of obtaining the user pressing strength, the display device only needs to scan the pressure touch electrodes in the corresponding touch area (the touch area where the touch position is located), and does not scan the pressure touch electrodes which are not in the touch area, so that compared with the prior art that the user pressing strength is obtained by scanning all the pressure touch electrodes on the touch display panel, the number of the pressure touch electrodes scanned in the embodiment is relatively small, so that the power consumption is small, the scanning period is short, and the scanning efficiency is obviously improved.
In a third aspect, the present invention provides a driving method, which is applied to the touch display panel according to the first aspect of the present invention;
sensing a touch position;
determining a touch area where the touch position is located according to the touch position;
and when the touch position is positioned in the y touch area, controlling the input end of each multi-path gating circuit to be conducted with the y output end.
One of the above technical solutions has the following beneficial effects:
according to the driving method, the pressure touch electrode in the corresponding touch area is scanned by conducting the corresponding input end and the input end in the gating multi-path gating circuit, so that the pressing pressure of a user is obtained. In the driving method, only the pressure touch electrodes in the corresponding touch area (the touch area where the touch position is located) are scanned in a targeted manner, and the pressure touch electrodes which are not in the touch area are not scanned. Compared with the prior art that the pressing force of the user is obtained by scanning all the pressure touch electrodes on the touch display panel, the scanning method has the advantages that the number of the pressure touch electrodes is small, so that the power consumption is low, the scanning period is short, and the scanning efficiency is obviously improved.
[ 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 view of a first structure of a touch display panel according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a touch display panel according to an embodiment of the invention;
fig. 3 is a schematic layout view of pressure touch electrodes in a touch area according to an embodiment of the present invention;
fig. 4 is a schematic view of a second structure of the touch display panel according to the embodiment of the invention;
fig. 5 is a schematic diagram of a third structure of a touch display panel according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating a fourth structure of a touch display panel according to an embodiment of the present invention;
fig. 7 is a timing diagram illustrating driving of a touch display panel according to an embodiment of the invention;
fig. 8 is a schematic view illustrating a fifth structure of a touch display panel according to an embodiment of the present invention;
fig. 9 is an exemplary diagram of a display device according to an embodiment of the present invention.
[ 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 although the terms 1 st, 2 nd, 3 rd, etc. may be used to describe the touch areas or the strobes in the embodiments of the present invention, these touch areas or strobes should not be limited to these terms. These terms are only used to distinguish touch areas or strobes from each other. For example, without departing from the scope of the embodiments of the present invention, the 1 st touch area may also be referred to as the 2 nd touch area, and similarly, the 2 nd touch area may also be referred to as the 1 st touch area; similarly, the 1 st multiplexer may also be referred to as the 2 nd multiplexer.
The embodiment of the invention provides a touch display panel, which comprises N touch areas, wherein M pressure touch electrodes are arranged in each touch area; the driving circuit includes M pieces of multiplexer circuits, each of which includes N output terminals and an input terminal.
The ith output end of each multi-path gating circuit is connected with the pressure touch electrode in the ith touch area; the jth pressure touch electrode in each touch area is connected with a jth multi-channel gating circuit; the input end is connected with the driving end of the driving circuit. i is less than or equal to N, j is less than or equal to M, and both N and M are natural numbers which are greater than or equal to 1.
For example, in order to enable those skilled in the art to more clearly understand the embodiments of the present invention, fig. 1 is taken as an example to describe in detail the specific structure of the touch display panel.
When N is 3 and M is 2, please refer to fig. 1, which is a first structural diagram of a touch display panel according to an embodiment of the present invention. The touch display panel 100 includes a 1 st touch area 10, a 2 nd touch area 20, and a 3 rd touch area 30. The 1 st touch area 10 includes pressure touch electrodes 101 and 102, the 2 nd touch area includes pressure touch electrodes 201 and 202, and the 3 rd touch area includes pressure touch electrodes 301 and 302.
The touch display panel 100 further includes a driving circuit 1, where the driving circuit 1 includes a 1 st multiple-way gate 11 and a 2 nd multiple-way gate 12, where each multiple-way gate includes 3 output terminals and 1 input terminal.
In the 1 st multiplexing circuit 11, the 1 st output terminal 111 is electrically connected to the pressure touch electrode 101 in the 1 st touch area, the 2 nd output terminal 112 is electrically connected to the pressure touch electrode 201 in the 2 nd touch area, and the 3 rd output terminal 113 is electrically connected to the pressure touch electrode 301 in the 3 rd touch area; the input terminal of the multiplexer 11 is electrically connected to the driving terminal 200. It can also be understood that the pressure touch electrodes in the 1 st touch area are electrically connected to the 1 st output terminals of each multi-way gating circuit in a one-to-one correspondence manner, the pressure touch electrodes in the 2 nd touch area are electrically connected to the 2 nd output terminals of each multi-way gating circuit in a one-to-one correspondence manner, and the pressure touch electrodes in the 3 rd touch area are electrically connected to the 3 rd output terminals of each multi-way gating circuit in a one-to-one correspondence manner. In addition, the connection manner of the output terminal and the input terminal of the 2 nd multiplexing gate 12 is similar to that of the 1 st multiplexing gate 11, and is not described herein again.
The 1 st and 2 nd gates 11 and 12 are arranged in this order from left to right with reference to the orientation in fig. 1. In addition, in the 1 st multiplexer circuit, there are a 1 st output terminal 111, a 2 nd output terminal 112, and a 3 rd output terminal 113 in order from left to right. The connection mode of the 3 output terminals in the 2 nd multi-path gating circuit is similar to that of the output terminals in the 1 st multi-path gating circuit, please refer to the description of the connection mode of the output terminals in the 1 st driving circuit at the above corresponding positions, and no further description is given here. As an example, the touch display panel 100 shown in fig. 1 only shows 3 touch areas, where each of the 3 touch areas includes 2 pressure touch electrodes and 2 multi-way gating circuits, and actually, the number of touch areas on the touch display panel 100 is much greater than 3, the number of pressure touch electrodes in each touch area is much greater than 2, and the number of multi-way gating circuits is also much greater than 2. In addition, in this embodiment, the position of the touch area is only schematic and does not represent an actual position.
The following is a detailed description of the working principle and working process of the above embodiment:
please refer to fig. 2, which is a cross-sectional view of a touch display panel according to an embodiment of the present invention. The touch display panel comprises a reference electrode 24 and an array substrate 21, wherein a pressure touch electrode is arranged on the array substrate 21, and the pressure touch electrode and the reference electrode 24 form a capacitor. When the user presses the touch display panel 100, the pressure touch electrode at the corresponding position and the reference electrode 24 form an induced capacitance Δ C, where the induced capacitance Δ C is ∈ S/Δ d, where ∈ represents a dielectric constant, S represents a facing area, and Δ d represents an induced distance. ε and S are known parameters that cause a change in the sense capacitance Δ C when the sense distance Δ d changes. Further, the magnitude of the pressure is sensed by sensing the amount of change in capacitance.
When a user performs a pressing operation, the position of the pressure touch electrode pressed by the user needs to be determined, and then the corresponding position is scanned to further sense the pressing force of the user. Specifically, in the position touch stage, the pressure touch electrodes are reused as the sensing touch electrodes, pulse signals are provided for the sensing touch electrodes through capacitance detection, the touch position is determined by detecting the sensing signals on the sensing touch electrodes, and it is determined that the sensing touch electrodes are located in the touch area. And then, in the pressure touch stage, scanning the determined touch area, and further sensing the pressure degree of the user. Therefore, the pressing strength can be obtained only by scanning the pressure touch electrodes in the corresponding touch area, and the pressing strength can be obtained without scanning all the pressure touch electrodes in the whole touch display panel as in the prior art, so that the number of the scanning pressure touch electrodes can be effectively reduced and the scanning speed can be improved.
Illustratively, when the touch area where the pressure touch electrode is located is sensed to be the 2 nd touch area, the input end of each multi-channel gating circuit is controlled to be connected with the 2 nd output end, that is, all the pressure touch electrodes in the second touch area are connected with the corresponding input ends through the output ends connected with each other, and then the connected pressure touch electrodes are scanned, so that the magnitude of the pressure degree is obtained. In this embodiment, only the pressure touch electrodes in the corresponding touch area (the touch area where the touch position is located) are scanned in a targeted manner during the scanning process, and the rest of the touch areas are not scanned, so that compared with the prior art in which the magnitude of the degree of pressing by the user is obtained by scanning all the pressure touch electrodes on the touch display panel, the number of the pressure touch electrodes scanned in this embodiment is relatively small, so that the power consumption is small, the scanning period is short, and the scanning efficiency is significantly improved.
In addition, each of the multiple gating circuits in the above embodiments is connected to the driving terminal through only one input terminal, so that the number of ports used in the driving circuit is reduced, and further, the occupied space of the ports is reduced.
In a specific embodiment, as shown in fig. 3, it is a schematic layout diagram of the pressure touch electrodes in the touch area provided in the embodiment of the present invention. The pressure touch electrodes in each touch area are arranged in an A-row B-row array, wherein A is more than or equal to 1 and less than or equal to M, B is more than or equal to 1 and less than or equal to M, and M is a natural number more than or equal to 1. For example, the arrangement of the pressure touch electrodes will be described in detail by taking the 1 st touch area 10 as an example. The pressure touch electrodes in the 1 st touch area 10 are arranged in an array, where the number of rows is 7 and the number of columns is 6, so that the number of pressure touch electrodes in the 1 st touch area is 42. The array arrangement is uniform in distribution on the touch display panel, leads are arranged favorably, and electric leakage between the leads is avoided.
It should be noted that, as an example, fig. 3 only shows 1 touch area, and the 1 st touch area 10 shown only includes 42 pressure touch electrodes, actually, the number of touch areas included in the touch display panel is much greater than 1, and the number of pressure touch electrodes in each touch area is also much greater than 42.
In a more specific embodiment, the jth multiplexing circuit includes M switches, each switch including an input terminal and an output terminal. The jth pressure touch electrode in each touch area is connected with the output end of one switch in the jth multi-path gating circuit; the input ends of the M switches are connected with the driving end. Wherein j is less than or equal to M, and M is a natural number greater than or equal to 1.
In the whole touch display panel, the signal quantity of the pressure touch electrode close to the central area of the touch display panel or positioned in the central area of the touch display panel is greater than the electric signal quantity of the pressure touch electrode positioned in the edge area of the touch display panel. Therefore, when the jth pressure touch electrode in each touch area is electrically connected with the output end of one switch in the jth multi-channel gating circuit, the pressure touch electrodes in each touch area are combined to be arranged in an array mode, that is, the pressure touch electrodes at the same position in each touch area are electrically connected to the same multi-channel gating circuit, so that the length of a lead between the pressure touch electrode close to the central area of the touch display panel and the output end is larger than the length of a lead between the pressure touch electrode in the edge area and the output end, and finally, the signal quantity of the pressure touch electrode in the edge area of the touch display panel and the electric signal quantity of the pressure touch electrode in the central area tend to be consistent.
For example, when M is 9, as shown in fig. 4, it is a schematic diagram of a second structure of the touch display panel provided in the embodiment of the present invention. The touch display panel of FIG. 4 includes a 1 st touch area 10, a 2 nd touch area 20, and a 3 rd touch area 30. The touch display panel further comprises multiple gating circuits 11-19. Fig. 4 is a further definition of the driving circuit based on fig. 1, and therefore, the same parts as fig. 1 are not described again. When j is 2, the 2 nd multi-way gating circuit 12 comprises 3 switches, each switch comprises an input end and an output end, wherein the 2 nd pressure touch electrode in each touch area is electrically connected with the output end of one switch in the 2 nd multi-way gating circuit 12; the input ends of the 3 switches are all electrically connected in the driving end. When j is equal to 1 and 3, the electrical connection manner of the 3 switches in the multiplexer circuits 11 and 13 can refer to the electrical connection relationship of the 3 switches in the multiplexer circuit 12, and will not be described herein again.
Still taking fig. 4 as an example, the connection manner between the 9 pressure touch electrodes in the 2 nd touch area 20 and the multi-way gating circuit is described in detail as follows:
the 1 st pressure touch electrode 201 in the 2 nd touch area 20 is electrically connected with the output end of the 2 nd switch in the 1 st multi-way gating circuit 11; the 2 nd pressure touch electrode 202 is electrically connected with the output end of the 2 nd switch in the 2 nd multi-way gating circuit 12; the 3 rd pressure touch electrode 203 is electrically connected with the output terminal of the 2 nd switch in the 3 rd multiplexer 13. The connection between the 4 th to 9 th pressure touch electrodes and the multi-way gating circuit can be referred to as the connection between the 1 st pressure touch electrode 201, which is not described herein again. When the sensed pressure touch electrode is in the 2 nd touch area, the input end and the output end of the 2 nd switch in each multi-path gating circuit are conducted, so that the pressure touch electrode in the touch area is scanned, and the magnitude of the pressure degree is further obtained. In this embodiment, only the pressure touch electrodes in the corresponding touch area are scanned, and the pressure touch electrodes in other touch areas are not scanned, so that compared with the prior art in which all the pressure touch electrodes on the touch display panel need to be scanned, the number of the pressure touch electrodes can be effectively reduced, and the scanning rate is increased.
Note that, with the orientation shown in fig. 4 as a reference, the 1 st output terminal, the 2 nd output terminal, and the 3 rd output terminal are provided in the multiplexer 11 in this order from left to right. The arrangement of the output terminals in the multiple gating circuits 12 to 19 is the same as that in the multiple gating circuit 11, and will not be described herein again. As an example, the touch display panel shown in fig. 4 only shows 3 touch areas each including only 9 pressure touch electrodes and 9 multiplexing gates each including only 3 switches. In fact, the number of touch areas and the number of switches in each multi-way gating circuit are both much greater than 3, and the number of multi-way gating circuits and the number of pressure touch electrodes in each touch area are both much greater than 9. In the present embodiment, the positions of the switches in the multiplexer circuits 11 to 19 are merely schematic and do not indicate actual positions.
Furthermore, each switch also comprises a control end; the control end of the a-th switch in each multi-way gating circuit is connected to the same control line; wherein a is less than or equal to M, and M is a natural number greater than or equal to 1.
Illustratively, with continued reference to FIG. 4, the driver circuit further includes 3 control lines SW1, SW2 and SW3, and each of the switches in the multiplexers 11-19 further includes a control terminal. The 9 1 st switches of the multiplexer circuits 11-19 are electrically connected to the same control line SW1, the 9 2 nd switches are electrically connected to the same control line SW2, and the 9 3 rd switches are electrically connected to the same control line SW 3. In other words, when the electrical signal in the control line SW1 turns on the input terminal and the output terminal of the 1 st switch in the multi-way gating circuits 11 to 19, the pressure touch electrode in the 1 st touch area can be scanned to further sense the magnitude of the pressing force of the user. The quantity of the lead wires can be effectively reduced by controlling the on and off of the switches through one control line, and the space occupied by the lead wires on the touch display panel is further reduced. The control of control line SW2 and control line SW3 is similar to control line SW1 and will not be described herein.
The pressure touch control electrodes in the corresponding touch control area can be scanned through the same control line, so that all the touch control pressure electrodes in the whole touch control display panel are prevented from being scanned, the scanning efficiency is improved, and the power consumption is obviously reduced due to the fact that the number of the scanned pressure touch control electrodes is reduced.
Still taking fig. 4 as an example, the working process of the above embodiment will be described in detail.
Illustratively, when the touch area where the pressure touch electrode is located is sensed to be the 2 nd touch area 20, the input end and the output end of the 2 nd switch in each multi-way gating circuit are conducted, so that the pressure touch electrode in the touch area is scanned, and the magnitude of the pressing force of the user is sensed. In the embodiment, the number of the scanning pressure touch electrodes is effectively reduced, the power consumption is reduced, and the scanning efficiency is improved. When the touch areas where the sensed pressure touch electrodes are located are the 1 st touch area 10 and the 3 rd touch area 30, the working process is similar to that of the 2 nd touch area 20, and the description thereof is omitted.
Further, the opening or closing of the corresponding switch can be controlled through a control line. Specifically, the input terminal and the output terminal of the 2 nd switch in each multiplexer circuit are connected through the control line SW 2. The working process of the 1 st touch area 10 and the 3 rd touch area 30 is similar to that of the 2 nd touch area, and is not repeated herein.
In addition, the 1 st switch, the 2 nd switch, and the 3 rd switch in the multiplexer 11, and the 1 st switch, the 2 nd switch, and the 3 rd switch in the multiplexer 12 are arranged in this order from left to right with reference to the orientation shown in fig. 4.
In a possible implementation scheme, the switch may be implemented by a Metal Oxide Semiconductor (MOS) transistor, and accordingly, the control terminal of the switch may be a gate of the MOS transistor, the signal output terminal of the switch may be a drain of the MOS transistor, and the signal input terminal of the switch may be a source of the MOS transistor, or the control terminal of the switch may be a gate of the MOS transistor, the signal output terminal of the switch may be a source of the MOS transistor, and the signal input terminal of the switch may be a drain of the MOS transistor.
In another possible embodiment, the jth multi-way gating circuit includes k stages of switch sets, each stage of switch set including one input terminal and two output terminals; a first output end of the x-th level switch group is connected to an input end of the x-1 th level switch group, and a second output end of the x-th level switch group is connected to a jth pressure touch electrode in an x +1 th touch area; a first output end and a second output end of the 1 st-level switch group are respectively and correspondingly connected to the jth pressure touch electrode in the 1 st touch area and the 2 nd touch area; wherein x is more than or equal to 2 and less than or equal to M-1, j is less than or equal to M, and M is a natural number which is more than or equal to 1.
For example, in order to better understand the above embodiments, the following takes the structure of the touch display panel in fig. 5 as an example to describe in detail.
Fig. 5 is a schematic view of a third structure of the touch display panel according to the embodiment of the invention. The touch display panel (not shown) includes a 1 st touch area 10, a 2 nd touch area 20, a 3 rd touch area 30, … …, an x th touch area, and an (x +1) th touch area. Each touch area comprises 3 pressure touch electrodes. When j is 2, the multiplexer includes a 1 st switch group, a 2 nd switch group, … …, an x-1 th stage switch group, and an x th stage switch group. Each stage of switch group comprises two output ends and an input end, and the input end of the x-th stage of switch group is electrically connected with the driving end 200; the input end of the x-1 th level switch group is electrically connected with the first output end of the x-th level, and the second output end of the x-th level is electrically connected with the 2 nd pressure touch electrode (x +1)02 in the (x +1) th touch area. The first output terminal of the 1 st-level switch set is electrically connected to the 2 nd pressure touch electrode 102 in the 1 st touch area, and the second output terminal is electrically connected to the 2 nd pressure touch electrode 202 in the 2 nd touch area. The electrical connection of the 1 st and 3 rd multiplexers can refer to the electrical connection of the 2 nd multiplexer, and is not described herein again.
The 1 st, 2 nd, and 3 rd gates are provided in this order from left to right with reference to the orientation shown in fig. 5. As an example, fig. 5 only shows 5 touch areas and each touch area includes 3 pressure touch electrodes, and 3 strobing circuits, and in practice, the number of touch areas is much greater than 5, and the number of pressure touch electrodes within each touch area is much greater than 3, and the number of strobing circuits is much greater than 3. In addition, in the present embodiment, the positions within the 1 st, 2 nd, and 3 rd multiplexer circuits are merely schematic and do not represent actual positions.
The form of the switch group can effectively reduce one input end, so that the number of lead wires in the touch display panel is effectively reduced, and the problem of electric leakage caused by conduction between the lead wires due to excessive lead wires is avoided.
Furthermore, the switch group also comprises two control ends, wherein the first control end is connected with the first output end, and the second control end is connected with the second output end. The control ends of the switch groups of the same grade are connected to the same control line.
Illustratively, with continued reference to fig. 5, each switch group includes a first control terminal connected to the first output terminal and a second control terminal connected to the second output terminal, and the driving circuit further includes x control lines SW, wherein the control lines SW1 control all switch groups in the 1 st stage switch group, … …, and the control lines SWx control all switch groups in the x th stage switch group.
In a more specific embodiment, the first control terminal of the switch set may be an N-type thin film transistor, and the second control terminal may be a P-type thin film transistor. Alternatively, the second control terminal of the switch group may be an N-type thin film transistor, and the first control terminal may be a P-type thin film transistor. Accordingly, the control terminal of the switch group may be a gate of the thin film transistor, the output terminal of the switch group may be a drain of the thin film transistor, and the input terminal of the switch group may be a source of the thin film transistor. Alternatively, the control terminal of the switch group may be a gate of a thin film transistor, the output terminal of the switch group may be a source of the thin film transistor, and the input terminal of the switch group may be a drain of the thin film transistor.
The switch group can be used for effectively reducing the number of leads in the touch display panel and reducing the number of control lines, so that the problem of electric leakage caused by conduction between the control lines is avoided.
For example, refer to fig. 6, which is a schematic diagram of a fourth structure of the touch display panel according to the embodiment of the present invention. When x is 2, j is 2, and M is 6, that is, the 2 nd multi-way gate circuit includes a 2 nd-level switch group, a first output terminal of the 1 st-level switch group is electrically connected to the 2 nd pressure touch electrode in the 1 st touch area, a second output terminal of the 1 st-level switch group is electrically connected to the 2 nd pressure touch electrode in the 2 nd touch area, a first output terminal of the 2 nd-level switch group is electrically connected to an input terminal of the 1 st-level switch group, and a second output terminal of the 2 nd-level switch group is electrically connected to the 2 nd pressure touch electrode in the 3 rd touch area. In addition, the electrical connection relationship between the multi-way gate circuit and the pressure touch electrode when j is 1 can refer to the electrical connection relationship between the multi-way gate circuit and the pressure touch electrode when j is 2, which is not described herein again.
Still taking fig. 6 as an example, the working process of the above embodiment will be described in detail.
When the pressure touch electrode pressed by the user is located in the 2 nd touch area 20, the control line SW2 is at a low level, so that the input terminal of the 2 nd-level switch group is conducted with the first output terminal; the control line SW1 is at a high level, so that the input terminal and the second output terminal of the level 1 switch set are connected, and the pressure touch electrode in the 2 nd touch area 20 is scanned. The working process effectively reduces the number of the scanning pressure touch electrodes, reduces power consumption and improves scanning efficiency. The working process of the 1 st touch area 10 and the 3 rd touch area 30 is similar to that of the 2 nd touch area 20, and is not described herein again.
On the basis of the foregoing embodiments, in an optional implementation manner, the touch display panel further includes a plurality of sensing touch electrodes, where the sensing touch electrodes are used for sensing a touch position of a user; and determining a touch area where the pressure touch electrode is located by sensing the touch position sensed by the touch electrode. In another optional implementation, the pressure touch electrode is reused as an induction touch electrode in a position touch time period, and is used for inducing the touch position of the user; the pressure touch electrode is used for detecting the pressing force of a user in a pressure touch time period; and determining a touch area where the pressure touch electrode is located by sensing the touch position sensed by the touch electrode. Further, the pressure touch electrode is multiplexed as a common electrode in a display time period to receive a common voltage signal.
Next, taking the example that the pressure touch electrode of the touch display panel shown in fig. 6 is reused as the sensing touch electrode in the position touch time period and is reused as the common electrode in the display time period as an example, refer to fig. 7, which is a driving timing diagram of the touch display panel provided in the embodiment of the present invention, and specifically is a driving timing diagram for displaying a frame time. Referring to fig. 6 and 7, in the present embodiment, the pressure touch electrodes (101-106,201-206, and 301-306) are multiplexed as the sensing touch electrodes during the position touch time period T and are multiplexed as the common electrodes during the display time period D. Specifically, referring to fig. 8, a fifth structural schematic diagram of the touch display panel according to the embodiment of the invention is shown. The touch display panel further comprises a liquid crystal display panel, wherein the liquid crystal display panel comprises an array substrate 21 and a color film substrate 22 which are arranged oppositely, and a liquid crystal layer 23 located between the array substrate 21 and the color film substrate 22. A plurality of sub-pixels (not shown) defined by a plurality of rows of gate lines (not shown) and a plurality of columns of data lines (not shown) are arranged on the array substrate 21, and a thin film transistor (not shown), a pixel electrode (not shown) and a common electrode (101-106, 201-206, and 301-306) are arranged in each sub-pixel. The grid electrode of each thin film transistor is connected with a grid line, the source electrode of each thin film transistor is connected with a data line, and the drain electrode of each thin film transistor is connected with a pixel electrode. Under the control of the corresponding gate line, the data line corresponding to the source electrode of the thin film transistor charges and discharges to the pixel electrode corresponding to the drain electrode through the thin film transistor, and an electric field is formed between the pixel electrode and the common electrode (101-106, 201-206, and 301-306). When the liquid crystal display panel is displaying, i.e. the display time period D, the common electrodes (101-106, 201-206, and 301-306) receive a common voltage signal (usually a constant voltage signal as shown in fig. 7), and an electric field is formed between the pixel electrode and the common electrodes (101-106, 201-206, and 301-306) to control the rotation of liquid crystal molecules in the liquid crystal layer, thereby achieving the display function. In the embodiment, the common electrodes (101 to 106,201 to 206, and 301 to 306) are reused as the sensing touch electrodes in the position touch time period T, pulse signals can be provided for each sensing touch electrode in a self-capacitance detection mode, the touch position is determined by detecting the sensing signals on the sensing touch electrodes, and the sensing touch electrodes are determined to be located in the touch area; and multiplexing the pressure touch time period F as the pressure touch electrode, and scanning the pressure touch electrode in the corresponding touch area according to the determined touch area, wherein the switch and/or the switch group is/are controlled to be closed by providing corresponding voltage signals for the control SW1, the control SW2 and the like.
Fig. 9 is a diagram illustrating a display device according to an embodiment of the present invention. The display device 500 includes the touch display panel 100. It should be noted that fig. 9 exemplifies a mobile phone as an example of the display device, but the display device is not limited to the mobile phone, and specifically, the display device may include, but is not limited to, any electronic device having a display function, such as a Personal Computer (PC), a Personal Digital Assistant (PDA), a wireless handheld device, a tablet Computer (tablet Computer), an MP4 player, or a television.
In the process of sensing the pressing force of the user, the display device 500 only needs to scan the pressure touch electrodes in the corresponding touch area (the touch area where the touch position is located), and does not scan the pressure touch electrodes that are not in the touch area, so that compared with the prior art that the pressing force of the user is sensed by scanning all the pressure touch electrodes on the touch display panel, the number of the pressure touch electrodes scanned in the embodiment is relatively small, so that the power consumption is small, the scanning period is short, and the scanning efficiency is obviously improved.
The invention provides a driving method, which is suitable for the touch display panel. The driving method includes:
and S101, sensing a touch position.
S102, determining a touch area where the touch position is located according to the touch position.
And S103, controlling the input end of each multi-path gating circuit to be conducted with the y-th output end when the touch position is located in the y-th touch area.
According to the driving method, the pressure touch electrode in the corresponding touch area is scanned by conducting the corresponding input end and the input end in the gating multi-path gating circuit, so that the magnitude of the pressing force of a user is sensed. In the driving method, only the pressure touch electrodes in the corresponding touch area (the touch area where the touch position is located) are scanned in a targeted manner, and the pressure touch electrodes which are not in the touch area are not scanned. Compared with the prior art that the pressing force of the user is obtained by scanning all the pressure touch electrodes on the touch display panel, the scanning method has the advantages that the number of the pressure touch electrodes is small, so that the power consumption is low, the scanning period is short, and the scanning efficiency is obviously improved.
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.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
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 (12)
1. A touch display panel is characterized by comprising N touch areas, wherein M pressure touch electrodes are arranged in each touch area;
the driving circuit comprises M multi-path gating circuits, and each multi-path gating circuit comprises N output ends and an input end;
an ith output end of each multi-path gating circuit is connected with the pressure touch electrode in an ith touch area; the jth pressure touch electrode in each touch area is connected with a jth multi-channel gating circuit; the input end is connected with the driving end of the driving circuit;
wherein i is less than or equal to N, j is less than or equal to M, and both N and M are natural numbers greater than or equal to 1;
the jth multi-path gating circuit comprises k stages of switch groups, wherein each stage of switch group comprises an input end and two output ends;
a first output end of the x-th level switch group is connected to an input end of the x-1 th level switch group, and a second output end of the x-th level switch group is connected to a jth pressure touch electrode in an x +1 th touch area; a first output end and a second output end of the 1 st-level switch group are respectively and correspondingly connected to the jth pressure touch electrode in the 1 st touch area and the 2 nd touch area;
wherein x is more than or equal to 2 and less than or equal to M-1, j is less than or equal to M, and M is a natural number which is more than or equal to 1.
2. The touch display panel of claim 1,
the pressure touch electrodes in each touch area are arranged in an A-row and B-row array;
wherein, A is more than or equal to 1 and less than or equal to M, B is more than or equal to 1 and less than or equal to M, and M is a natural number more than or equal to 1.
3. The touch display panel of claim 1,
the jth multiplexer circuit includes M switches, each of said switches including an input terminal and an output terminal;
the jth pressure touch electrode in each touch area is connected with the output end of one switch in the jth multi-path gating circuit; the input ends of the M switches are connected with the driving end;
wherein j is less than or equal to M, and M is a natural number greater than or equal to 1.
4. The touch display panel of claim 3,
each switch also comprises a control end;
the control end of the a-th switch in each multi-way gating circuit is connected to the same control line;
wherein a is less than or equal to M, and M is a natural number greater than or equal to 1.
5. The touch display panel according to claim 1, wherein the switch set further comprises two control terminals, a first control terminal is connected to the first output terminal, and a second control terminal is connected to the second output terminal;
the control ends of the switch groups of the same grade are connected to the same control line.
6. The touch display panel according to claim 5, wherein the first control terminal of the switch set is an N-type TFT and the second control terminal is a P-type TFT;
or the second control end of the switch group is an N-type thin film transistor, and the first control end is a P-type thin film transistor.
7. The touch display panel of claim 1, wherein when x is 2, the jth multi-way gate circuit includes a 2-level switch set, a first output terminal of the 1-level switch set is connected to the jth pressure touch electrode in the 1 st touch area, a second output terminal of the 1-level switch set is connected to the jth pressure touch electrode in the 2 nd touch area, a first output terminal of the 2 nd-level switch set is connected to an input terminal of the 1 st-level switch set, and a second output terminal of the 2 nd-level switch set is connected to the jth pressure touch electrode in the 3 rd touch area.
8. The touch display panel according to any one of claims 1 to 4, further comprising a plurality of sensing touch electrodes for sensing a touch position of a user;
and determining a touch area where the pressure touch electrode is located according to the touch position sensed by the induction touch electrode.
9. The touch display panel according to any one of claims 1 to 4, wherein the pressure touch electrode is reused as an induction touch electrode in a position touch time period for inducing a touch position of a user;
the pressure touch electrode is used for detecting the touch strength of a user in a pressure touch time period;
and determining a touch area where the pressure touch electrode is located according to the touch position sensed by the induction touch electrode.
10. The touch display panel according to any one of claims 1 to 4, wherein the pressure touch electrode is reused as a common electrode in a display time period to receive a common voltage signal.
11. A display device comprising the touch display panel according to any one of claims 1 to 10.
12. A driving method, wherein the driving method is applied to the touch display panel according to any one of claims 1 to 10;
sensing a touch position;
determining a touch area where the touch position is located according to the touch position;
and when the touch position is positioned in the y touch area, controlling the input end of each multi-path gating circuit to be conducted with the y output end.
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| CN112860116B (en) * | 2021-03-04 | 2022-10-14 | 深圳市汇顶科技股份有限公司 | Touch control driving circuit, driving chip and touch control display device |
| WO2022183451A1 (en) * | 2021-03-04 | 2022-09-09 | 深圳市汇顶科技股份有限公司 | Touch-control driving circuit, driving chip and touch-control display apparatus |
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