CN107562279B - Embedded self-capacitance touch liquid crystal display device and data processing chip and screen body thereof - Google Patents

Embedded self-capacitance touch liquid crystal display device and data processing chip and screen body thereof Download PDF

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Publication number
CN107562279B
CN107562279B CN201710829545.7A CN201710829545A CN107562279B CN 107562279 B CN107562279 B CN 107562279B CN 201710829545 A CN201710829545 A CN 201710829545A CN 107562279 B CN107562279 B CN 107562279B
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touch
driving
controlled
multiplexing
control
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CN107562279A (en
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成守红
罗魏熙
陈波
王诗玮
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FocalTech Systems Ltd
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FocalTech Systems Ltd
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Priority to PCT/CN2018/105667 priority patent/WO2019052531A1/en
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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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal (AREA)

Abstract

The invention relates to an embedded self-capacitance touch liquid crystal display device and a data processor and a screen body thereof. The touch controlled switch devices are divided into N groups of touch groups. When the data processing chip is used for touch detection and control, after the touch controlled end of the touch controlled switch device of each touch group receives the conducting touch control signal in a touch time slice, each multiplexing electrode of the same touch group is electrically connected with the touch module in one touch time slice. According to the invention, by adopting the scheme of electrode multiplexing and pin multiplexing, the number of pins of a data processing chip of the embedded self-capacitance touch liquid crystal display device is reduced, so that the number of contact bump of a touch detection channel is reduced, the area of the chip is reduced, and the boundary range under a touch display panel is reduced.

Description

Embedded self-capacitance touch liquid crystal display device and data processing chip and screen body thereof
Technical Field
The present invention relates to a circuit connection structure and a circuit structure for reducing connection pins of a data processing chip, and more particularly, to a circuit connection structure of an embedded touch screen and a circuit structure for reducing connection pins of a data processing chip.
Background
The embedded self-capacitance touch liquid crystal display screen comprises a liquid crystal display screen body and a data processing chip, wherein self-capacitance changes are detected through electrodes distributed In a screen touch area, whether the screen is touched or not is judged, and the touched position is determined. Whether the scheme of the data processing chip of the In-Cell self-capacitance Touch liquid crystal Display adopts an Integrated Drive and control Integrated Drive and Controller scheme called IDC for short, or adopts a Touch and Display Drive Integrated Drive scheme called TDDI for short, or adopts a scheme of independently setting Touch Drive and Display Drive, a Touch pin capable of outputting a Touch detection signal needs to be arranged on the chip for electrically connecting the self-capacitance electrode In the Display. As shown In fig. 11, the data processing chip 9 of the In-Cell self-capacitance touch lcd panel In the prior art, whether it adopts the IDC scheme, the TDDI scheme or the separate touch driving scheme, needs to configure one touch pin 91 for each self-capacitance electrode 8 In the connection pins of the data processing chip 9. In fig. 11, 10 self-capacitance electrodes 8 are exemplarily provided, and 10 touch pins 10 are required to be provided for the data processing chip 9 to complete touch detection and control. In practical applications, the In-Cell self-capacitance touch liquid crystal is generally provided with 600 or so self-capacitance electrodes, and then the data processing chip 9 needs to be provided with 600 or so left or right touch pins 91. Prior art chip fabrication techniques are not limitless in determining the size of the data processing chip. Because the total width of the connecting wires between the data processing chip and the liquid crystal display screen body is basically determined by the length of the data processing chip, the more the connecting pins are, the smaller the distance between the connecting wires is. Therefore, In the prior art, the In-Cell self-capacitance touch liquid crystal display screen causes the large number of the connecting pins of the data processing chip 9, the distance between the connecting pins is reduced, and the yield of products is influenced.
Disclosure of Invention
The technical problem to be solved by the invention is to avoid the defects of the prior art and provide an embedded self-capacitance touch liquid crystal display device with reduced pin number of a data processing chip, and the data processing chip and a screen body thereof.
The technical problem to be solved by the invention can be realized by adopting the following technical scheme:
designing and manufacturing an embedded self-capacitance touch liquid crystal display screen body, which comprises a self-capacitance electrode plate used for detecting screen touch actions and a multiplexing electrode used as a common level electrode plate for liquid crystal display, wherein the time period for executing the screen touch actions is defined as a touch time period, and the time period for executing the liquid crystal display is defined as a display time period; the touch-control controlled switch device is respectively configured for each multiplexing electrode. The display screen body is provided with at least one touch signal electrical node for leading in a touch signal from the outside of the display screen body. The touch controlled switch device comprises a first touch electric connection end, a second touch electric connection end and a touch controlled end capable of enabling the first touch electric connection end and the second touch electric connection end to be connected or disconnected. When the touch controlled end receives the conduction touch control signal, the first touch electric connection end is conducted with the second touch electric connection end. The touch controlled switch device is divided into N groups of touch groups, N being a natural number not less than 2, so that the multiplexing electrodes are also divided into N groups of touch groups. The first touch control electric connection ends of the touch control switch devices are electrically connected with the multiplexing electrodes configured respectively, and the second touch control electric connection ends of the touch control switch devices in the same touch control group are electrically connected with a touch control signal electric node respectively; the touch time period comprises N touch time slices, so that after the touch controlled end of the touch controlled switch device of each touch group receives the conducting touch control signal in a touch time slice mode, each touch time slice selects the multiplexing electrode of one touch group to execute touch detection, and each multiplexing electrode of the same touch group is respectively and electrically connected with each touch signal electrical node in one touch time slice.
To reduce cost, the touch controlled switching device is a thin film transistor.
Furthermore, a detection time-sharing gating control electrical node used for introducing a touch control signal applied to the touch controlled end from the outside of the display screen body is further arranged for the display screen body. Grouping the touch-controlled switch devices in the touch group, so that the touch-controlled switch devices in the nth touch group are divided into MnGroup control signal group, N is variable, N =1, 2, …, N, M1、M2、…MNAre all natural numbers; and the touch controlled ends of the touch controlled switch devices of the same control signal group are electrically connected with the same detection time-sharing gating control electrical node.
In order to inhibit the substrate capacitance interference, the embedded self-capacitance touch liquid crystal display screen body also comprises a drive controlled switch device which is respectively configured for each multiplexing electrode. And the display screen body is also provided with a driving signal electrical node for introducing a driving signal from the outside of the display screen body. Substrate capacitance disturbance can be suppressed by means of the drive signal. The drive controlled switch device comprises a first drive electric connection end, a second drive electric connection end and a drive controlled end which can enable the first drive electric connection end and the second drive electric connection end to be connected or disconnected; when the drive controlled end receives the conduction drive control signal, the first drive electric connection end is conducted with the second drive electric connection end. The first driving electric connection ends of the driving controlled switch device are electrically connected with the multiplexing electrodes configured respectively, and the second driving electric connection ends are electrically connected with the driving signal electric nodes.
To reduce costs, the drive controlled switching device is a thin film transistor.
Specifically, a driving time-sharing gating control electrical node for introducing a driving control signal applied to a driving controlled end from the outside of the display screen body is further arranged for the display screen body. The driving controlled ends of the driving controlled switching devices configured on the multiplexing electrodes of the same touch group are electrically connected with the same driving time-sharing gating control electrical node, so that the driving controlled switching devices are divided into N groups of driving control groups.
In another scheme, a detection driving multiplexing time-sharing gating control electrical node is further arranged on the display screen body and used for applying a touch control signal to the touch controlled end or applying a driving control signal to the driving controlled end. The detection driving multiplexing time-sharing gating control electrical node is electrically connected with the touch controlled end of the touch switch device and the driving controlled end of the driving controlled switch device.
In order to overcome the defect of quick scribing touch operation, the display screen body is also provided with a detection time-sharing gating control electrical node used for introducing a touch control signal applied to a touch controlled end from the outside of the display screen body. The multiplexing electrodes of the N groups of touch groups are distributed in more than two blocks. Multiplexing electrodes which belong to each touch group are arranged in any block. Setting time slice sequence numbers for the touch time slices, and setting the touch groups where the multiplexing electrodes gated by the touch time slices are located as group numbers with the same time slice sequence numbers; the arrangement of the multiplexing electrodes meets the requirement that the group numbers of the touch groups of any two adjacent multiplexing electrodes are the same or have one difference. The touch controlled ends of the touch switch devices of the same touch group in each block are electrically connected with the same detection time-sharing gating control electrical node.
The technical problem to be solved by the invention can also be solved by adopting the following technical scheme:
a data processing chip is designed and manufactured and used for an embedded self-capacitance touch liquid crystal display device and comprises a touch module used for touch detection and control and at least one touch pin. When the data processing chip is used for touch detection and control, the touch pins are electrically connected with the touch module and used for outputting touch signals. The embedded self-capacitance touch liquid crystal display device also comprises an embedded self-capacitance touch liquid crystal display screen body. The embedded self-capacitance touch liquid crystal display screen body comprises multiplexing electrodes which are used as self-capacitance electrode plates for detecting screen touch actions and common level electrode plates for liquid crystal display, and touch controlled switch devices which are respectively configured for each multiplexing electrode. The time period for executing the touch action of the detection screen is defined as a touch time period, and the time period for executing the liquid crystal display is defined as a display time period. The touch controlled switch device comprises a first touch electric connection end, a second touch electric connection end and a touch controlled end which can enable the first touch electric connection end and the second touch electric connection end to be connected or disconnected; when the touch controlled end receives the conduction touch control signal, the first touch electric connection end is conducted with the second touch electric connection end. The touch controlled switch device is divided into N groups of touch groups, N being a natural number not less than 2, so that the multiplexing electrodes are also divided into N groups of touch groups. The first touch control electric connection ends of the touch control switch devices of the same touch control group are electrically connected with the multiplexing electrodes configured respectively, and the second touch control electric connection ends of the touch control switch devices of the same touch control group are electrically connected with the touch control pins of the data processing chip respectively; the touch time period comprises N touch time slices, so that when the data processing chip is used for touch detection and control, after the touch controlled end of the touch controlled switch device of each touch group receives a conducting touch control signal in a touch time slice manner, each touch time slice selects the multiplexing electrode of one touch group to execute touch detection, and each multiplexing electrode of the same touch group is electrically connected with the touch module in one touch time slice.
To reduce cost, the touch controlled switching device is a thin film transistor.
Specifically, the data processing chip is further provided with at least one detection time-sharing gating control pin for outputting a touch control signal to the touch controlled terminal. Grouping the touch controlled switch devices of each touch group respectively to divide the touch controlled switch devices of the nth touch group into MnGroup control signal group, N is variable, N =1, 2, …, N, M1、M2、…MNAre all natural numbers. And the touch controlled end of the touch controlled switch device of the same control signal group is electrically connected with the same detection time-sharing gating control pin of the data processing chip.
In order to inhibit interference, the data processing chip is also provided with a driving signal module capable of outputting a driving signal for inhibiting substrate capacitance interference and at least one driving signal pin, and the driving signal pins are electrically connected with the driving signal module and used for outputting the driving signal. The embedded self-capacitance touch liquid crystal display screen body also comprises a drive controlled switch device which is respectively configured for each multiplexing electrode. The drive controlled switch device comprises a first drive electric connection end, a second drive electric connection end and a drive controlled end capable of enabling the first drive electric connection end and the second drive electric connection end to be connected or disconnected. When the drive controlled end receives the conduction drive control signal, the first drive electric connection end is conducted with the second drive electric connection end. The first driving electric connection ends of the driving controlled switch device are electrically connected with the multiplexing electrodes configured respectively, and the second driving electric connection ends are electrically connected with the driving signal pins. When the data processing chip is used for touch detection and control, the multiplexing electrode electrically connected with the touch module is in a touch starting state; the multiplexing electrode which is not electrically connected with the touch module is in a suspended state. And applying a conducting drive control signal to a drive controlled end of the drive controlled switch device, so that the multiplexing electrodes in the suspended state around the multiplexing electrodes in the touch enabled state are input with drive signals by the drive signal module, or all the multiplexing electrodes in the suspended state are input with drive signals by the drive signal module, thereby inhibiting the capacitance interference on the multiplexing electrodes in the touch enabled state.
To reduce costs, the drive controlled switching device is a thin film transistor.
The driving signal module includes a voltage follower. The touch signal output by the touch module is input to the non-inverting input end of the voltage follower. The output end of the voltage follower is electrically connected with the inverting input end and used for outputting a driving signal.
Furthermore, the data processing chip is also provided with a driving time-sharing gating control pin for applying a driving control signal to the driving controlled end. The driving controlled ends of the driving controlled switching devices configured on the multiplexing electrodes of the same touch group are electrically connected with the same driving time-sharing gating control pin, so that the driving controlled switching devices are divided into N groups of driving control groups.
In another scheme, the data processing chip is further provided with a detection driving multiplexing time-sharing gating control pin, and the detection driving multiplexing time-sharing gating control pin is used for applying a touch control signal to the touch controlled end or applying a driving control signal to the driving controlled end. The detection driving multiplexing time-sharing gating control pin is electrically connected with a touch controlled end of the touch switch device and a driving controlled end of the driving controlled switch device.
The invention can solve the technical problem and can be realized by adopting the following technical scheme:
an embedded self-capacitance touch liquid crystal display device is designed and manufactured, and comprises an embedded self-capacitance touch liquid crystal display screen body and a data processing chip at least used for touch detection and control. The embedded self-capacitance touch liquid crystal display screen body comprises self-capacitance electrode plates for detecting screen touch actions, multiplexing electrodes of a common level electrode plate for liquid crystal display and touch controlled switch devices respectively configured for each multiplexing electrode. The time period for executing the touch action of the detection screen is defined as a touch time period, and the time period for executing the liquid crystal display is defined as a display time period. The touch controlled switch device comprises a first touch electric connection end, a second touch electric connection end and a touch controlled end capable of enabling the first touch electric connection end and the second touch electric connection end to be connected or disconnected. When the touch controlled end receives the conduction touch control signal, the first touch electric connection end is conducted with the second touch electric connection end. The data processing chip is provided with a touch module for touch detection and control and at least one touch pin. When the data processing chip is used for touch detection and control, the touch pins are electrically connected with the touch module and used for outputting touch signals. The touch controlled switch device is divided into N groups of touch groups, N being a natural number not less than 2, so that the multiplexing electrodes are also divided into N groups of touch groups. The first touch control electric connection ends of the touch control switch devices of the same touch control group are electrically connected with the multiplexing electrodes configured respectively, and the second touch control electric connection ends of the touch control switch devices of the same touch control group are electrically connected with the touch control pins of the data processing chip respectively. The touch time period comprises N touch time slices, so that when the data processing chip is used for touch detection and control, after the touch controlled end of the touch controlled switch device of each touch group receives a conducting touch control signal in a touch time slice manner, each touch time slice selects the multiplexing electrode of one touch group to execute touch detection, and each multiplexing electrode of the same touch group is electrically connected with the touch module in one touch time slice.
To reduce cost, the touch controlled switching device is a thin film transistor.
Specifically, the data processing chip is further provided with at least one detection time-sharing gating control pin for outputting a touch control signal to the touch controlled terminal. Grouping the touch controlled switch devices of each touch group respectively to divide the touch controlled switch devices of the nth touch group into MnGroup control signal group, N is variable, N =1, 2, …, N, M1、M2、…MNAre all natural numbers. And the touch controlled ends of the touch controlled switch devices of the same control signal group are electrically connected with the same touch control pin of the data processing chip.
In order to inhibit the substrate capacitance interference, the embedded self-capacitance touch liquid crystal display screen body also comprises a drive controlled switch device which is respectively configured for each multiplexing electrode. The data processing chip is also provided with a driving signal module capable of outputting a driving signal for inhibiting the substrate capacitance interference and at least one driving signal pin, and the driving signal pins are electrically connected with the driving signal module and used for outputting the driving signal. The drive controlled switch device comprises a first drive electric connection end, a second drive electric connection end and a drive controlled end capable of enabling the first drive electric connection end and the second drive electric connection end to be connected or disconnected. When the drive controlled end receives the conduction drive control signal, the first drive electric connection end is conducted with the second drive electric connection end. The first driving electric connection ends of the driving controlled switch device are electrically connected with the multiplexing electrodes configured respectively, and the second driving electric connection ends are electrically connected with the driving signal pins. When the data processing chip is used for touch detection and control, the multiplexing electrode electrically connected with the touch module is in a touch starting state; the multiplexing electrode which is not electrically connected with the touch module is in a suspended state. And applying a conducting drive control signal to a drive controlled end of the drive controlled switch device, so that the multiplexing electrodes in the suspended state around the multiplexing electrodes in the touch enabled state are input with drive signals by the drive signal module, or all the multiplexing electrodes in the suspended state are input with drive signals by the drive signal module, thereby inhibiting the capacitance interference on the multiplexing electrodes in the touch enabled state.
To reduce costs, the drive controlled switching device is a thin film transistor.
Specifically, the driving signal module includes a voltage follower; the touch signal output by the touch module is input to the non-inverting input end of the voltage follower. The output end of the voltage follower is electrically connected with the inverting input end and used for outputting a driving signal.
Furthermore, the data processing chip is also provided with a driving time-sharing gating control pin for applying a driving control signal to the driving controlled end. The driving controlled ends of the driving controlled switching devices configured on the multiplexing electrodes of the same touch group are electrically connected with the same driving time-sharing gating control pin, so that the driving controlled switching devices are divided into N groups of driving control groups.
In addition, the data processing chip is also provided with a detection driving multiplexing time-sharing gating control pin, and the detection driving multiplexing time-sharing gating control pin is used for applying a touch control signal to the touch controlled end or applying a driving control signal to the driving controlled end. The detection driving multiplexing time-sharing gating control pin is electrically connected with a touch controlled end of the touch switch device and a driving controlled end of the driving controlled switch device.
In order to realize multiplexing of touch control and display drive, the data processing chip is also used for liquid crystal display drive control and is also provided with a common level module for outputting common level for liquid crystal display.
According to one implementation scheme, a data processing chip controls a touch module and a common level module to be electrically connected with touch pins in a time-sharing mode, and when the data processing chip is used for touch detection and control, the touch pins are controlled to be electrically connected with the touch module and used for outputting touch signals; when the data processing chip is used for driving and controlling the liquid crystal display, the touch pins are electrically connected with the common level module and are used for outputting a common level.
In another implementation scheme, the data processing chip controls the driving signal module and the common level module to be electrically connected with the driving signal pins in a time-sharing manner, and when the data processing chip is used for touch detection and control, the driving signal pins are controlled to be electrically connected with the driving signal module to output driving signals. When the data processing chip is used for the liquid crystal display signal pins, the common level module is electrically connected and used for outputting the common level.
In order to overcome the defect of rapid scribing touch operation, the data processing chip is also provided with a detection time-sharing gating control pin for applying a touch control signal to the touch controlled end. The multiplexing electrodes of the N groups of touch groups are distributed in more than two blocks. Multiplexing electrodes which belong to each touch group are arranged in any block. Setting time slice sequence numbers for the touch time slices, and setting the touch groups where the multiplexing electrodes gated by the touch time slices are located as group numbers with the same time slice sequence numbers; the arrangement of the multiplexing electrodes meets the requirement that the group numbers of the touch groups of any two adjacent multiplexing electrodes are the same or have one difference. The touch controlled ends of the touch switch devices of the same touch group in each block are electrically connected with the same detection time-sharing gating control pin.
Compared with the prior art, the embedded self-capacitance touch liquid crystal display device and the data processing chip and the screen body thereof have the technical effects that:
by the scheme of electrode multiplexing and pin multiplexing, pins of a data processing chip of the embedded self-capacitance touch liquid crystal display screen are reduced, so that the number of contact bumps of a touch detection channel is reduced, the area of the chip is reduced, and the boundary range under a touch display panel is reduced; the invention adopts the thin film transistor as the controlled switch device, and can realize the scheme of reducing the touch control pins without changing the whole manufacturing process, thereby ensuring simple implementation and low cost.
Drawings
FIG. 1 is an electrical schematic diagram of a first embodiment of an "embedded self-capacitance touch LCD device and its data processing chip and screen" of the present invention;
FIG. 2 is an electrical schematic of a third embodiment of the invention;
FIG. 3 is a schematic diagram of the bulk electrical schematic of an embedded self-capacitive touch LCD panel with a fast scribe touch operation defect;
FIG. 4 is an electrical schematic of a fourth embodiment of the invention;
FIG. 5 is an electrical schematic of a fifth embodiment of the invention;
FIG. 6 is an electrical schematic of a sixth embodiment of the invention;
FIG. 7 is an electrical schematic of a seventh embodiment of the invention;
FIG. 8 is an electrical schematic of an eighth embodiment of the invention;
FIG. 9 is an electrical schematic of a ninth embodiment of the invention;
FIG. 10 is an electrical schematic of a tenth embodiment of the invention;
fig. 11 is an electrical schematic of a prior art embedded self-capacitive touch liquid crystal display.
Detailed Description
The embodiments are described in further detail below with reference to the attached drawings.
The invention provides an embedded self-capacitance touch liquid crystal display screen body. The embedded self-capacitance touch liquid crystal display screen body is the most basic physical existence device of a display screen of the embedded self-capacitance touch liquid crystal display screen device, and comprises the most basic components for displaying images, such as liquid crystal, electrodes for driving the liquid crystal, and the like, the most basic components for touch detection, such as electrodes for detecting capacitance change, and the like, and various wires, such as connecting wires among the components in the display screen body, leading-out wires among the components in the display screen body and the components or devices outside the display screen body, and the like. As shown in fig. 1, the embedded self-capacitance touch lcd panel includes a multiplexing electrode 1 serving as both a self-capacitance electrode plate for detecting a screen touch and a common level electrode plate for lcd display, and defines a time period for performing the screen touch as a touch time period and a time period for performing the lcd display as a display time period. The embedded self-capacitance touch liquid crystal display screen body also comprises touch controlled switch devices 2 which are respectively configured for each multiplexing electrode 1. At least one touch signal electrical node 51 for introducing a touch signal from outside the display screen is provided for the display screen. In the embodiments of the present invention, the lead-out wires include wires for electrically connecting the multiplexing electrodes 1 and wires for electrically connecting components in the display screen. The lead-out wire can be a metal wire or a light-transmitting wire made of a light-transmitting material. The various electrical nodes refer to a conductive network which is formed by connecting the end points of electronic components together by good conductors and has the same potential, voltage differences (potential differences) between the end points of different electronic components on the conductive network can be ignored, the potential at any point on the conductive network can be considered to be the same, current flows on the network, but the impedance of the network is extremely small, and the voltage drop of the current on any branch on the network can be ignored, so that the network is generally formed by leads and the end points of the electronic components connected by the leads. The touch signal electrical node 51 may be disposed in the display screen body, and a touch signal is introduced from the outside of the display screen body through a lead; the touch signal electrical node 51 may also be disposed outside the display screen body, and the touch signal may be introduced into the display screen body through a lead wire. When the touch signal electrical node 51 is disposed outside the display screen, its physical structure implementation form may be a solder joint or a pin of a chip, especially a part of a plurality of connection pins of a data processing chip. The touch-controlled switch device 2 includes a first touch electrical connection end 21, a second touch electrical connection end 22, and a touch-controlled end 23 capable of connecting or disconnecting the first touch electrical connection end 21 and the second touch electrical connection end 22. The touch controlled terminal 23 is configured to receive a touch control signal, where the touch control signal includes an on touch control signal and an off touch control signal. When the touch controlled terminal 23 receives the conducting touch control signal, the first touch electrical connection terminal 21 and the second touch electrical connection terminal 22 are conducted. When the touch-controlled terminal 23 receives the turn-off control signal, the first touch electrical connection terminal 21 and the second touch electrical connection terminal 22 are open-circuited and disconnected. The on-touch control signal and the off-touch control signal are set to be a high level or a low level according to the device characteristics, and when the on-touch control signal is high-level effective, the off-touch control signal is low-level effective; conversely, when the on touch control signal is active at a low level, the off touch control signal is active at a high level. The touch controlled switch device 2 is divided into N touch groups, N being a natural number not less than 2, so that the multiplexing electrode 1 is also divided into N touch groups. The first touch electrical connection terminals 21 of the touch controlled switch devices 2 are electrically connected to the respective multiplexing electrodes 1, and the second touch electrical connection terminals 22 of the touch controlled switch devices 2 in the same touch group are electrically connected to a touch signal electrical node 51. For the second touch electrical connection terminals 22 of the touch controlled switch devices 2 of the same touch group, they correspond to the touch control electrical nodes 51 one by one, and there is no situation that different second touch electrical connection terminals 22 of the touch controlled switch devices 2 of the same touch group are connected in parallel with the same touch signal electrical node 51. The touch time period comprises N touch time slices. After the touch controlled end 23 of the touch controlled switch device 2 of each touch group receives the conducting touch control signal in a touch time slice manner, each touch time slice selects the multiplexing electrode 1 of one touch group to execute touch detection, and each multiplexing electrode 1 of the same touch group is respectively and electrically connected with different touch signal electrical nodes 51 in one touch time slice, namely the multiplexing electrode 1 of each touch group multiplexes the touch signal electrical nodes 51 in the touch time slice manner.
According to the scheme, a touch signal electric node which is equivalent to a connection pin of a data processing chip is not required to be arranged for each multiplexing electrode outgoing line in the prior art, multiplexing of the touch signal electric node 51 is achieved by means of the touch controlled switch 2, and after N touch time slices, all multiplexing electrodes 1 are electrically connected with the touch signal electric node 51 once. In the first embodiment of the present invention, as shown in fig. 1, 10 multiplexing electrodes 1 are divided into 5 touch groups G1, G2, G3, G4 and G5, the multiplexing electrodes 1 of each touch group are electrically connected to touch signal electrical nodes 51, and 5 touch time slices can be electrically connected to the multiplexing electrodes 1 in a time-sharing manner by only setting 2 touch signal electrical nodes 51, which greatly reduces the number of the touch signal electrical nodes 51 compared with the prior art, and the significant reduction of the touch signal electrical nodes 51 means that the connection pins of the data processing chip outside the display screen can be greatly reduced. Reducing the number of connection pins of the data processing chip not only increases the pin pitch of the chip, but more importantly, increases the pitch of the wires connected with the display screen body. The pins of the chip connected with the display screen body can be arranged in 2 to 3 rows in parallel, and the pin pitch can be increased by arranging more pins in one row, but the pitch of the wires connected with the display screen body cannot be changed by doing so. The invention not only reduces the number of connecting pins of the data processing chip, but also increases the space between the wires connected with the display screen body, thereby improving the yield of the product.
In the first to fourth embodiments of the present invention, the touch controlled switch device is a thin film Transistor, TFT for short. One of the source and drain electrodes of the thin film transistor TFT serves as a first touch electrical connection terminal 21, the other serves as a second touch electrical connection terminal 22, and the gate electrode of the thin film transistor serves as a touch controlled terminal 23. The thin film transistor TFT is a commonly used controlled switching device 2 of the liquid crystal display panel, and a manufacturing process for electrically connecting electrodes in the liquid crystal display panel is mature, so that the thin film transistor TFT is used as the touch controlled switching device 2, the scheme is easy to implement and low in cost, and the scheme of reducing touch electrical nodes can be implemented at low cost.
The display screen body is also provided with a detection device for introducing a touch control signal applied to the touch controlled terminal 23 from outside the display screen bodyThe control electrical node 52 is time-gated. As mentioned above, the touch control signal applied to the touch-controlled terminal 23 includes an on touch control signal and an off touch control signal. Each multiplexing electrode 1 is provided with a touch-controlled switching device 2, and if each touch-controlled switching device 2 is individually provided with an electrical node electrically connected with the touch-controlled terminal 23, many electrical nodes are still set. In the first embodiment of the present invention, as shown in fig. 1, the touch controlled terminals 23 of the touch controlled switch devices 2 of the same touch group are electrically connected to the same detection time-sharing gating control electrical node 52, so as to reduce the number of electrical nodes. When there are many touch-controlled switch devices 2 in the same touch group, electrically connecting their touch-controlled terminals 23 together will cause a situation that a touch-control signal failure is not easily detected, and a failed touch-control signal will be masked by many normal touch-control signals, so the second embodiment of the present invention proposes a scheme for reducing the detection of time-division gating control electrical node + control signal grouping on the basis of the first embodiment, which is not shown in the drawings, to group the touch-controlled switch devices 2 in the touch group, so that the touch-controlled switch device 2 in the nth touch group is divided into M groupsnGroup control signal group, N is variable, N =1, 2, …, N, M1、M2、…MNAre all natural numbers. The touch controlled terminals 23 of the touch controlled switch devices 2 of the same control signal group are electrically connected to the same detection time-sharing gating control electrical node 52, and receive the touch control signals output by the same touch control signal output circuit in the touch module. The touch controlled terminals 23 of the touch controlled switch devices 2 of different control signal groups in the same touch group are not connected to the same detection time-sharing gating control electrical node 52, but receive the touch control signals with the same time sequence, that is, the time for turning on the touch controlled switch devices 2 of different control signal groups in the same touch group is the same. For example, when N =2, i.e. there are 2 touch groups, the touch-controlled switch devices 2 of the 1 st touch group are divided into 8 control signal groups, and the touch-controlled switch devices 2 of the 2 nd touch group are divided into 3 control signal groups, i.e. M1=8，M2And = 3. For 8 control signal groups in the 1 st touch group, 8 detection time-sharing gating control nodes 52 are required to be arranged. For 3 in the 2 nd touch groupThe control signal group needs to be provided with 3 detection time-sharing gating control electric nodes 52. Preferably, the number of the control signal groups in each touch group is set to be the same as much as possible, so as to simplify the control. The detection time-sharing gating control electrical node 52 can be arranged in the display screen body, and a touch control signal is led in from the outside of the display screen body through a lead; the detection time-sharing gating control electrical node 52 can also be arranged outside the display screen body, and a touch control signal is led into the display screen body through a lead-out wire. When the detecting time-sharing gating control electrical node 52 is arranged outside the display screen body, the physical structure implementation form can be a welding point, and can also be a pin of a chip, especially a part of a plurality of connecting pins of a data processing chip.
In order to suppress the substrate interference, as shown in fig. 1, the first embodiment of the present invention further includes a driving controlled switching device 4 respectively configured for each multiplexing electrode 1. The display screen body is also provided with a drive signal electrical node 53 for introducing a drive signal from outside the display screen body. As will be described in detail later, substrate capacitance disturbance can be suppressed by means of the drive signal. The drive controlled switching device 4 includes a first drive electrical connection terminal 41, a second drive electrical connection terminal 42, and a drive controlled terminal 43 capable of connecting or disconnecting the first drive electrical connection terminal 41 and the second drive electrical connection terminal 42. The driving controlled terminal 43 is used for receiving driving control signals, which include an on driving control signal and an off driving control signal. When the driving controlled end 43 receives the on-driving control signal, the first driving electrical connection end 41 is connected to the second driving electrical connection end 42, and conversely, when the driving controlled end 43 receives the off-driving control signal, the first driving electrical connection end 41 is disconnected from the second driving electrical connection end 42. The on-drive control signal and the off-drive control signal are set to a high level or a low level according to device characteristics, and when the on-drive control signal is active at the high level, the off-drive control signal is active at the low level; conversely, when the on drive control signal is active low, the off drive control signal is active high. The first driving electrical connection terminal 41 of the driving controlled switch device 4 is electrically connected with the multiplexing electrode 1 configured respectively, and the second driving electrical connection terminal 42 is electrically connected with the driving signal electrical node 53. The driving signal electrical node 53 may be disposed in the display screen body, and a driving signal is introduced from the outside of the display screen body through a lead wire; the driving signal electrical node 53 may also be disposed outside the display screen body, and a driving signal is introduced into the display screen body through a lead-out wire. When the driving signal electrical node 53 is disposed outside the display screen, its physical structure may be implemented as a solder joint or a pin of a chip, especially a part of a plurality of connection pins of a data processing chip.
In the first to fourth embodiments of the present invention, the drive-controlled switching device 4 is a thin film transistor TFT. One of the source and drain electrodes of the thin film transistor TFT serves as a first drive electrical connection terminal 41 and the other serves as a second drive electrical connection terminal 42, with the gate electrode of the thin film transistor serving as a drive controlled terminal 43. Similarly, the thin film transistor TFT is used as the driving controlled switching device 4, so that the scheme is easy to implement and has low cost, and the scheme of reducing the touch electrical nodes can be implemented at low cost.
In the embedded self-capacitance touch liquid crystal display screen body provided in each embodiment of the present invention, the touch controlled switch device 2 and the driving controlled switch device 4 are preferably disposed on a thin film transistor Array TFT Array substrate of the display screen body.
In the first embodiment of the present invention, as shown in fig. 1, a driving time-sharing gate control electrical node 54 for introducing a driving control signal applied to the driving controlled terminal 43 from outside the display screen is further provided for the display screen. The driving controlled ends 43 of the driving controlled switching devices 4 configured to the multiplexing electrodes 1 of the same touch group are all electrically connected to the same driving time-sharing gating control electrical node 54, so that the driving controlled switching devices are divided into N groups of driving control groups, thereby reducing electrical nodes. The driving time-sharing gating control electrical node 54 can be arranged in the display screen body, and a driving control signal is led in from the outside of the display screen body through a lead-out wire; the driving time-sharing gating control electrical node 54 can also be arranged outside the display screen body, and a driving control signal is led into the display screen body through a lead-out wire. When the driving time-sharing gate control electrical node 54 is disposed outside the display screen, its physical structure implementation form may be a solder joint, or may be a pin of a chip, especially a part of a plurality of connection pins of a data processing chip.
When there are many driving controlled switching devices 4 in the same touch group, electrically connecting their driving controlled terminals 43 together may cause a situation that the driving control signal fails to be easily detected, and a failed driving control signal may be masked by a plurality of normal driving control signals, so the present invention proposes a scheme of reducing the grouping of driving time-sharing gating control electrical nodes + driving signals on the basis of the first embodiment, which is not shown in the drawings, and groups the driving controlled switching devices 4 in the same touch group, so that the touch controlled switching device 2 in the s-th touch group is divided into R groupssGroup drive control signal group, s is variable, s =1, 2, …, N, R1、R2、…RNAre all natural numbers. The driving controlled end 43 of the driving controlled switching device 4 of the same driving control signal group is electrically connected to the same driving time-sharing gating control electrical node 54, and receives the driving control signal output by the same driving signal generating circuit of the driving signal module. The driving controlled terminals 43 of the driving controlled switching devices 4 of different driving control signal groups in the same touch group are not connected to the same driving time-sharing gating control electrical node 54, but receive the driving control signals with the same time sequence, that is, the conducting time of the driving controlled switching devices 4 of different driving control signal groups in the same touch group is the same.
In a third embodiment of the present invention, as shown in fig. 2, the sensing time-sharing gate control electrical node 52 and the driving time-sharing gate control electrical node 54 are multiplexed into one electrical node. The display screen body is further provided with a detection driving multiplexing time-sharing gating control electrical node 55, and the detection driving multiplexing time-sharing gating control electrical node 55 is used for applying a touch control signal to the touch controlled terminal 23 or applying a driving control signal to the driving controlled terminal 43. The detection driving multiplexing time-sharing gating control electrical node 55 is electrically connected with the touch controlled terminal 23 of the touch switch device 2 and the driving controlled terminal 43 of the driving controlled switch device 4 at the same time. In the third embodiment of the present invention, a detection driving multiplexing time-sharing gating control node 55 is electrically connected to the touch controlled terminal 23 of the touch switch device 2 of a touch group and the driving controlled terminal 43 of the driving controlled switch device 4 of the touch group. In the third embodiment of the present invention, more specifically, the above electrical connection is completed by the logic not gate 6, a detection driving multiplexing time-sharing gating control electrical node 55 is electrically connected to all the touch controlled terminals 23 of the same touch group and one end of a logic not gate 6, and the other end of the logic not gate 6 is electrically connected to all the driving controlled terminals 43 of the touch group. When the detection driving multiplexing time-sharing gating control electrical node 55 applies a positive level, the positive level is equivalent to a conducting touch control signal applied to the touch controlled terminal 23, the first touch electrical connection terminal 21 and the second touch electrical connection terminal 22 are conducted, meanwhile, the negative level applied to the driving controlled terminal 43 is equivalent to a closing driving control signal applied to the driving controlled terminal 43, and the first driving electrical connection terminal 41 and the second driving electrical connection terminal 42 are disconnected in an open circuit; when the driving multiplexing time-sharing gating control node 55 is detected to apply a negative level, the negative level is equivalent to a turn-off touch control signal applied to the touch controlled terminal 23, the first touch electrical connection terminal 21 and the second touch electrical connection terminal 22 are open-circuited and disconnected, meanwhile, the positive level applied to the driving controlled terminal 43 is equivalent to a turn-on driving control signal applied to the driving controlled terminal 43, and the first driving electrical connection terminal 41 and the second driving electrical connection terminal 42 are turned on. It is obvious that the third embodiment of the present invention further reduces the number of electrical nodes, which is equivalent to reducing the number of connection pins of the external chip of the display screen. The detection driving multiplexing time-sharing gating control electrical node 55 can be arranged in the display screen body, and a touch control signal or a driving control signal is led in from the outside of the display screen body through a lead; the detection driving multiplexing time-sharing gating control electrical node 55 can also be arranged outside the display screen body, and a touch control signal or a driving control signal is introduced into the display screen body through a lead-out wire. When the detection driving multiplexing time-sharing gating control electrical node 55 is arranged outside the display screen body, the physical structure implementation form can be a welding point, and also can be a pin of a chip, especially a part of a plurality of connecting pins of a data processing chip.
When the on-touch control signal is sequentially applied to the touch controlled terminal 23 in touch groups by dividing the touch time slices, the duration of each touch time slice is assumed to be T, but for the layout scheme of the multiplexing electrode 1 in the above scheme of the present invention shown in fig. 3, two multiplexing electrodes 1 that belong to two touch groups that are adjacent to each other in the physical structure need to be touch-detected by dividing the duration of more than one touch time slice. In the scheme shown in fig. 3, 20 multiplexing electrodes are divided into 5 touch groups and arranged in 2 blocks, and assuming that the touch groups of the 2 blocks are numbered, the touch groups of the first block are numbered from top to bottom as G1, G2, G3, G4 and G5, and the touch groups of the second block are numbered from top to bottom as G1, G2, G3, G4 and G5. The touch controlled terminals of the touch groups with the same number in the two blocks are connected to the same detection time-sharing gating control electrical node 52, for example, the touch group with the first block number G1 and the touch group with the second block number G1 are connected to the same detection time-sharing gating control electrical node 52. For the scheme shown in fig. 3, when the touch control signals are sequentially applied to the touch controlled end 23 in touch time slices according to the order of the touch groups, most of the multiplexing electrodes 1 in two columns adjacent to each other in the physical structure are touch-detected only by the time length T of one touch time slice, but the Z-indicated area in fig. 3, that is, the multiplexing electrodes 1 in two columns adjacent to each other in the physical structure, which belong to the 1 st touch group G1 and the 5 th touch group G5, needs to complete touch detection on the multiplexing electrodes 1 in the central column by the time length 4T of 4 touch time slices of the 2 nd touch group G2, the 3 rd touch group G3, the 4 th touch group G4, and the 5 th touch group G5, respectively, after the touch detection is completed on the multiplexing electrodes 1 in the central column of the 5 th touch group G5. That is, two columns of multiplexing electrodes 1 adjacent to each other in the physical structure in the area Z need to be touch-detected after a duration of 4T of 4 touch time slices. If a fast-moving touch action occurs in the region Z within the time length 4T of 4 touch time slices, touch detection errors such as multiple report points, missed report points or report point position errors occur, and the experience of a user in the fast line drawing touch operation is affected. The layout scheme of the multiplex electrode 1 shown in fig. 3 is a layout scheme of the multiplex electrode 1 with the defect of quick scribing touch operation based on the scheme of the invention.
To solve this problem, the present invention proposes an improvement, as shown in fig. 4, in which a detection time-sharing gating control electrical node 52 for introducing a touch control signal applied to the touch controlled terminal 23 from outside the display screen is further provided for the display screen. The multiplexing electrodes 1 of the N groups of touch groups are distributed in more than two blocks. In the fourth embodiment of the present invention, as shown in fig. 4, 20 multiplexing electrodes 1 are divided into 5 touch groups, i.e., N =5, and 20 multiplexing electrodes 1 of 5 touch groups G1, G2, G3, G4, and G5 are divided into two blocks Q1 and Q2. Multiplexing electrodes 1 belonging to each touch group are arranged in any block. The touch groups to which the multiplexing electrodes 1 arranged in the block belong can cover all touch groups; or covering part of the touch groups, and the multiplexing electrodes 1 of the touch groups which are not covered in the current block are arranged in other blocks. For example, ten touch groups are set, that is, the multiplexing electrodes in the block are respectively divided into ten touch groups; the multiplexing electrodes in one block can also be respectively divided into four touch groups, and the multiplexing electrodes in the other block can be divided into six other touch groups. The number of touch groups to which the multiplexing electrodes 1 in each block belong may be the same or different. For example, the multiplexing electrodes in one block may belong to two touch groups, and the multiplexing electrodes in the other block may belong to three touch groups; the multiplexing electrodes in one block can also belong to two touch groups, and the multiplexing electrodes in the other block also belong to two touch groups. And setting time slice sequence numbers for the touch time slices, and setting the touch groups where the multiplexing electrodes gated by the touch time slices are located to be group numbers with the same time slice sequence number, wherein the sequence of the group numbers also accords with the gating sequence of the touch time slices. The arrangement of the multiplexing electrodes meets the condition that the group numbers of the touch groups of any two adjacent multiplexing electrodes are the same or have one difference. In the fourth embodiment of the present invention, according to the order of the touch time slices, sequential group numbers, i.e., G1, G2, G3, G4, and G5, are respectively set to the touch group where the multiplexing electrodes of the touch time slices are located, the touch group is gated at the 1 st touch time slice G1, the touch group is gated at the 2 nd touch time slice G2, …, and the touch group is gated at the 5 th touch time slice G5. The multiplexing electrodes of each touch group are arranged along a first direction and a second direction which are perpendicular to each other, in this embodiment, the first direction is a column direction, the second direction is a row direction, the multiplexing electrodes of the second direction belong to the same touch group, the same touch group number is adopted, and each touch group is gated according to the order of the touch time slices. Two blocks adjacent to each other along the first direction, that is, two blocks adjacent to each other along the row direction, that is, blocks Q1 and Q2, have the same or different group numbers of the touch groups to which the multiplexing electrodes 1 adjacent to each other along the first direction belong. As in the present embodiment, the group number of the touch group to which G4 in the block Q1 and the adjacent G3 or G5 belong differs by one, and the group number of the touch group to which G5 of the block Q1 and the group number of the touch group to which G5 of the adjacent block Q2 belong are the same. Particularly, in the fourth embodiment of the present invention, the multiplexing electrodes 1 in each column are respectively arranged in the order of the group numbers of the touch groups to which the multiplexing electrodes 1 belong in the reverse order, two columns of the block Q1 are arranged from bottom to top in the order of the touch groups G1, G2, G3, G4 and G5 to which the multiplexing electrodes 1 belong, two columns of the block Q2 are arranged from bottom to top in the order of the touch groups G5, G4, G3, G2 and G1 to which the multiplexing electrodes 1 belong, and the arrangement order of the multiplexing electrodes 1 in each column in the block Q2 is the reverse order of the arrangement order of the multiplexing electrodes 1 in the corresponding column in the block Q1. The group numbers of the touch groups to which all the multiplexing electrodes 1 adjacent to each other along the second direction belong are the same, and in the fourth embodiment of the present invention, the group numbers of the touch groups to which the multiplexing electrodes 1 in the same row in the block Q1 belong are the same, and each column is arranged in the order of the touch groups G1, G2, G3, G4, and G5 to which the multiplexing electrode 1 belongs from bottom to top, and the group numbers of the touch groups to which the multiplexing electrodes 1 in the same row in the block Q2 belong are the same, and each column is also arranged in the order of the touch groups G1, G2, G3, G4, and G5 to which the multiplexing electrode 1 belongs from top to bottom. As shown in fig. 4, the touch controlled terminals of the touch switch devices in the same touch group in each block are electrically connected to the same detection time-sharing gating control node 52.
In the fourth embodiment of the present invention, as shown in fig. 4, when the touch control signals are applied to the touch controlled end 23 sequentially in touch time slices according to the order of the touch groups, the multiplexing electrodes 1 belonging to different touch groups and adjacent to any physical structure are touch-detected only by spacing the duration T of one touch time slice or even less than the duration of one touch time slice. Compared with the scheme shown in fig. 3, the layout scheme of the multiplexing electrode 1 according to the fourth embodiment of the present invention avoids a touch detection error when a fast moving touch action occurs, thereby optimizing the experience of a user in a fast scribing touch operation.
Referring to the scheme of reducing the electrical nodes of the embedded self-capacitance touch liquid crystal display screen body, as shown in fig. 5, the invention further provides a data processing chip 3 for the embedded self-capacitance touch liquid crystal display device. The data processing chip 3 includes a touch module 321 for touch detection and control, and at least one touch pin 311. When the data processing chip 3 is used for touch detection and control, the touch pins 311 are electrically connected to the touch module 321 for outputting touch signals.
The embedded self-capacitance touch liquid crystal display device also comprises an embedded self-capacitance touch liquid crystal display screen body. The embedded self-capacitance touch liquid crystal display screen body comprises multiplexing electrodes 1 which are used as self-capacitance electrode plates for detecting screen touch actions and common level electrode plates for liquid crystal display, and touch controlled switch devices 2 which are respectively configured for each multiplexing electrode 1. The time period for executing the touch action of the detection screen is defined as a touch time period, and the time period for executing the liquid crystal display is defined as a display time period. The touch-controlled switch device 2 includes a first touch electrical connection end 21, a second touch electrical connection end 22, and a touch-controlled end 23 capable of connecting or disconnecting the first touch electrical connection end 21 and the second touch electrical connection end 22. The touch controlled terminal 23 is configured to receive a touch control signal, where the touch control signal includes an on touch control signal and an off touch control signal. When the touch controlled terminal 23 receives the conducting touch control signal, the first touch electrical connection terminal 21 and the second touch electrical connection terminal 22 are conducted. When the touch-controlled terminal 23 receives the off-touch control signal, the first touch electrical connection terminal 21 and the second touch electrical connection terminal 22 are open-circuited and disconnected. The touch controlled switch device 2 is divided into N touch groups, N being a natural number not less than 2, so that the multiplexing electrode 1 is also divided into N touch groups. The first touch electrical connection terminals 21 of the touch controlled switch devices 2 are electrically connected to the respective multiplexing electrodes 1, and the second touch electrical connection terminals 22 of the touch controlled switch devices 2 of the same touch group are electrically connected to different touch pins 311 of the data processing chip 3. The touch time period includes N touch time slices, so that, when the data processing chip 3 is used for touch detection and control, the touch controlled terminal 23 of the touch controlled switch device 2 of the touch group receives the conducting touch control signal in the touch time slices, each touch time slice selects the multiplexing electrode of one touch group to perform touch detection, and each multiplexing electrode 1 of the same touch group is electrically connected to the touch module 321 in one touch time slice.
The connection pins of the data processing chip include a touch pin 311, and a detection time-sharing gating control pin 312, a driving signal pin 313, a driving time-sharing gating control pin 314, and a detection driving multiplexing time-sharing gating control pin 315, which are described later. The multiplexing electrode needs to be connected to a connection pin of the data processing chip through a touch controlled switching device or a driving controlled switching device, but various signals are not necessarily directly connected to the connection pin of the data processing chip. The signal voltage of the thin film transistor is higher, generally higher than 10V, although the data processing chip can directly output a signal with higher voltage to the thin film transistor, more generally, the data processing chip only outputs a control signal, even possibly a control signal of 1.8V, and the drive circuit composed of the thin film transistor of the screen body, the resistor and other elements buffers and converts the control signal and then sends the control signal to the touch controlled switch device or drives the controlled switch device. Therefore, various signals can be directly sent out from the pins of the data processing chip, and can also be obtained after the control signals output by the data processing chip are subjected to conversion such as buffering, inversion, pressurization and the like. The touch control signals and the driving control signals of each touch group sent by the data processing chip are exactly in opposite relation during the touch time slice, so that the control signal output pins of the same data processing chip can be used for outputting the touch control signals and the driving control signals during the touch time slice, and an inverter formed by a thin film transistor is used on the screen body to generate the reverse signals of the touch control signals and the driving control signals during the period. The touch detection signal, the driving signal and the common level output by the connecting pin of the data processing chip are directly output by the data processing chip and are connected to the multiplexing electrode in a time-sharing manner through the selection of the thin film transistor switch. In the fifth embodiment of the present invention, as shown in fig. 5, an embedded self-capacitance touch lcd panel body composed of 10 multiplexing electrodes 1 adopts N =5, that is, 10 multiplexing electrodes 1 are divided into 5 touch groups G1, G2, G3, G4 and G5, and each touch group has two multiplexing electrodes 1, so that the data processing chip 3 only needs to be provided with 2 touch pins 311.
The multiplexing electrodes 1 are divided into N groups of touch groups, so that the touch controlled switches are also divided into N groups of touch groups, and the multiplexing electrodes 1 in the same touch group are respectively and electrically connected with different touch pins 311 by the aid of the touch controlled switch devices 2 configured respectively, so that one touch pin 311 is not only electrically connected with one self-capacitance electrode as in the prior art, but is simultaneously and electrically connected with one multiplexing electrode 1 in each touch group, and the touch pins 311 of the data processing chip 3 are reduced compared with the prior art. The number of touch pins 311 is determined by the maximum number of multiplexing electrodes 1 in each touch group. All multiplexing electrodes 1 should be divided into N groups of touch groups as much as possible, but when the total number of multiplexing electrodes 1 cannot be equally divided, or there are some special design requirements, the number of multiplexing electrodes 1 in each group of touch groups will be different, and then the number of touch pins 311 should meet the requirement of one group of touch groups with the largest number of multiplexing electrodes. For example, 73 multiplexing electrodes are divided into 8 touch groups, and if the grouping scheme is that the number of multiplexing electrodes 1 in 7 touch groups is 9, the number of multiplexing electrodes in 1 touch group is 10, and the data processing chip 3 needs to satisfy the group of touch group with the largest number of multiplexing electrodes 1 to set 10 touch pins 311. Obviously, according to the prior art, the above example requires 73 touch pins for the data processing chip 3, and the number of the touch pins 311 is greatly reduced to 10.
The time length of each touch time slice is T1, T2, … and TNAnd the interval duration between the touch time slices is T. There may be some segments of the display time period between the touch time slices, the touch detection is only performed during the touch time slices, the interval duration T of the touch time slices may also be set to a non-uniform time length, but a touch time slice detection mode with an equal interval duration is preferably used. A time length for completing the touch detection and control for all the multiplexing electrodes 1 at one time is defined as one touch cycle, i.e., touch cycle = T1+ T2+ … + TN. Is composed ofThe touch time period allocated by the data processing chip 3 for performing the touch detection and control process may be equal to one touch cycle. The duration of the touch detection and control process allocated to the data processing chip 3 may also be longer than one touch cycle, in which case, it may be set that the multiplexing electrode 1 is no longer subjected to touch detection and control, or it may be set that one touch detection and control is performed again, and even if the remaining duration of the touch time period is not enough to complete one touch cycle, the remaining touch cycle may be completed when the next touch detection and control process is performed. The touch time period allocated to the data processing chip 3 for performing the touch detection and control process may be less than one touch cycle, and in this case, the remaining touch cycles may be completed when the next touch detection and control process is performed. Therefore, the touch time period allocated for the data processing chip 3 to perform the touch detection and control process should not be limited by the touch cycle.
In the fifth to eleventh embodiments of the present invention, as shown in fig. 5 to 10, the touch-controlled switching device 2 is a thin film transistor TFT. One of the source and drain electrodes of the thin film transistor TFT serves as a first touch electrical connection terminal 21, the other serves as a second touch electrical connection terminal 22, and the gate electrode of the thin film transistor serves as a touch controlled terminal 23. The thin film transistor TFT is a commonly used controlled switching device of the liquid crystal display, and a manufacturing process for electrically connecting electrodes in the liquid crystal display is mature, so that the thin film transistor TFT is used as the touch controlled switching device 2, the scheme is easy to implement and low in cost, and the scheme of reducing the touch pins 311 can be implemented at low cost.
The data processing chip 3 is further provided with at least one detection time-sharing gating control pin 312 for outputting a touch control signal to the touch controlled terminal 23. In order to prevent the situation that the control signal failure is not easily detected and prevent a failure control signal from being covered by a plurality of normal control signals, an eleventh embodiment of the present invention provides a scheme for reducing the grouping of the touch pins and the control signals on the basis of the fifth embodiment, which is not shown in the drawing, and the touch controlled switch devices 2 of each touch group are respectively grouped so that the touch controlled switch devices of the nth touch group are respectively grouped2 is divided into MnGroup control signal group, N is variable, N =1, 2, …, N, M1、M2、…MNAre all natural numbers. The touch controlled terminals 23 of the touch controlled switch devices 2 of the same control signal group are electrically connected to the same detection time-sharing gating control pin 312 of the data processing chip 3. In the fifth to tenth embodiments of the present invention, as shown in fig. 5 to 10, respectively, which is a case of the eleventh embodiment that it is easier to control the on-touch control signal, 5 touch groups G1, G2, G3, G4 and G5 are provided, and the touch-controlled switch devices 2 of each touch group are divided into 1 group of control signal groups, i.e., N =5, M1=M2= M3= M4= M5=1。
In addition to the capacitance of the multiplex electrode 1 to ground, there is also a substrate capacitance in the embedded self-capacitance touch liquid crystal display device. During touch detection and control, a capacitance variation of about picofarad level can be formed between the multiplexing electrode 1 and the finger. The substrate capacitance includes capacitances formed between the multiplexing electrode 1 and other electrodes on the liquid crystal display Panel, such as a capacitance between one multiplexing electrode 1 and other multiplexing electrodes 1 adjacent to the multiplexing electrode 1, a capacitance on an In-Panel Gate drive Gate In Panel control wire on the liquid crystal display Panel, a capacitance between a connection wire connecting the multiplexing electrode 1 and the touch pin 311 and other multiplexing electrodes 1, and the like. On the embedded In-Cell display screen, the substrate capacitance of the multiplexing electrode 1 and the connecting wire can be as high as several hundred picofarads. When the ground capacitance of the multiplexing electrode 1 is measured, if several hundred picofarads of substrate capacitance are connected in parallel with a picofarads touch capacitance, the measurement of the touch capacitance is seriously interfered, and the variation of the substrate capacitance in a small proportion may be much larger than the touch capacitance, so the substrate capacitance may cause a capacitance value which cannot be measured correctly. A sixth embodiment of the present invention is based on the fifth embodiment, and as shown in fig. 6, the data processing chip 3 further includes a driving signal module 322 capable of outputting a driving signal for suppressing substrate capacitance interference, and at least one driving signal pin 313, where the driving signal pin 313 is electrically connected to the driving signal module 322 for outputting the driving signal. The embedded self-capacitance touch liquid crystal display screen body also comprises a drive controlled switching device 4 which is respectively configured for each multiplexing electrode 1. The drive controlled switching device 4 includes a first drive electrical connection terminal 41, a second drive electrical connection terminal 42, and a drive controlled terminal 43 capable of connecting or disconnecting the first drive electrical connection terminal 41 and the second drive electrical connection terminal 42. The driving controlled terminal 43 is used for receiving driving control signals, which include an on driving control signal and an off driving control signal. When the driving controlled end 43 receives the on-driving control signal, the first driving electrical connection end 41 is connected to the second driving electrical connection end 42, and conversely, when the driving controlled end 43 receives the off-driving control signal, the first driving electrical connection end 41 is disconnected from the second driving electrical connection end 42. The on-drive control signal and the off-drive control signal are set to a high level or a low level according to device characteristics, and when the on-drive control signal is active at the high level, the off-drive control signal is active at the low level; conversely, when the on drive control signal is active low, the off drive control signal is active high. The first driving electrical connection terminal 41 of the driving controlled switch device 4 is electrically connected to the multiplexing electrode 1 configured respectively, and the second driving electrical connection terminal 42 is electrically connected to the driving signal pin 313. When the data processing chip 3 is used for touch detection and control, the multiplexing electrode 1 electrically connected to the touch module 321 is in a touch enabled state; the multiplexing electrode 1 which is not electrically connected with the touch module 321 is in a floating state. A conducting driving control signal is applied to the driving controlled end 43 of the driving controlled switching device 4, so that the multiplexing electrode 1 in a floating state around the multiplexing electrode in a touch enabled state is input with a driving signal by the driving signal pin 313 by the driving signal module 322, or all the multiplexing electrodes 1 in a floating state are input with a driving signal by the driving signal module 322 by the driving signal pin 313, thereby suppressing the capacitive interference on the multiplexing electrode 1 in a touch enabled state. When the multiplexing electrode 1 is in the touch enable state, a voltage difference is generated on the substrate capacitance due to the applied touch signal, and the voltage difference causes the substrate capacitance value to change, thereby influencing the capacitance change caused by the touch detection of the multiplexing electrode 1. When the driving signal is applied to the multiplexing electrode 1 which is in the suspended state and is positioned at the periphery of the touch enabling state, the voltage difference of the substrate capacitor is eliminated under the combined action of the touch signal and the driving signal, so that the substrate capacitance value is not changed due to the touch signal, and the influence of the substrate capacitor on touch detection is inhibited. Similarly, when the driving signal is applied to all other multiplexing electrodes 1 in the floating state, the effect of the substrate capacitance on the touch detection is also suppressed.
Sixth to eleventh embodiments of the present invention, as shown in fig. 6 to 10, respectively, the drive-controlled switching device is a thin film transistor TFT. One of the source and drain electrodes of the thin film transistor TFT serves as a first drive electrical connection terminal 41 and the other serves as a second drive electrical connection terminal 42, with the gate electrode of the thin film transistor serving as a drive controlled terminal 43. The thin film transistor TFT is adopted as the drive controlled switch device 4, the scheme is easy to realize and has low cost, so that the scheme of reducing pins of a data processing chip can be realized at low cost.
As a specific implementation of the driving signal module, the driving signal module 321 of the sixth to tenth embodiments of the present invention includes a voltage follower, which is not shown in the drawings. The voltage follower may specifically employ an operational amplifier. The touch signal output by the touch module 321 is input to the non-inverting input terminal of the voltage follower. The output end of the voltage follower is electrically connected with the inverting input end and used for outputting a driving signal.
As shown in fig. 6 to 10, in order to facilitate the coordination control of the touch signal and the driving signal, the data processing chip 3 further includes a driving time-sharing gating control pin 314 for applying the driving control signal to the driving controlled terminal according to the sixth to eleventh embodiments of the present invention. The driving controlled terminals 43 of the driving controlled switching devices 4 configured to the multiplexing electrodes 1 of the same touch group are all electrically connected to the same driving time-sharing gating control pin 314, so that the driving controlled switching devices 4 are divided into N groups of driving control groups, thereby further reducing the pin number of the data processing chip 3.
In the seventh embodiment of the present invention, the data processing chip 3 is further provided with a detection driving multiplexing time-sharing gating control pin 315, and the detection driving multiplexing time-sharing gating control pin 315 is used for applying a touch control signal to the touch controlled terminal 23 or applying a driving control signal to the driving controlled terminal 43. The detection driving multiplexing time-sharing gating control pin 315 is electrically connected to the touch controlled terminal 23 of the touch switch device 2 and the driving controlled terminal 43 of the driving controlled switch device 4. In the seventh embodiment of the present invention, a detection driving multiplexing time-sharing gating control pin 315 is electrically connected to the touch controlled terminal 23 of the touch switch device 2 of a touch group and the driving controlled terminal 43 of the driving controlled switch device 4 of the touch group. Although the detection time-sharing gate control pin 312 and the driving time-sharing gate control pin 314 are provided in the data processing chip 3 to detect the driving multiplexing time-sharing gate control pin 315, it is not meant that the detection time-sharing gate control pin 312 and the driving time-sharing gate control pin 314 may be combined into one pin, but one pin may be time-shared. Since the touch control signal and the driving control signal cannot be applied to the touch controlled terminal 23 and the driving controlled terminal 43 at the same time, the detection time-sharing gating control pin 312 and the driving time-sharing gating control pin 314 have a multiplexing condition, and the touch control signal and the driving control signal are time-sharing multiplexed to detect the driving multiplexing time-sharing gating control pin 315. The touch control signal and the driving control signal are both continuously present, and the touch control signal has a high-low level, that is, the level of the on switch is different from the level of the off switch. The drive control signal is also continuously present, but there is also a difference between the level of the on switch and the level of the off switch. When the detection drive multiplexing time-sharing gating control pin 315 outputs a conducting touch control signal, the detection drive multiplexing time-sharing gating control pin 315 serves as a detection time-sharing gating control pin 312; when the detection drive multiplexing time-sharing gate control pin 315 outputs the on drive control signal, the detection drive multiplexing time-sharing gate control pin 315 serves as the drive time-sharing gate control pin 314. The seventh embodiment of the invention, more particularly the above electrical connection is accomplished by means of a logic not gate 6. A detection driving multiplexing time-sharing gating control pin 315 is electrically connected to all the touch controlled terminals 23 of the same touch group and one end of a not gate 6, and the other end of the not gate 6 is electrically connected to all the driving controlled terminals 43 of the touch group. When the detection drive multiplexing time-sharing gating control pin 315 applies a positive voltage, the positive voltage is equivalent to a conducting touch control signal applied to the touch controlled terminal 23, the first touch electrical connection terminal 21 and the second touch electrical connection terminal 22 are conducted, meanwhile, the negative voltage applied to the drive controlled terminal 43 is equivalent to a disconnecting drive control signal applied to the drive controlled terminal 43, and the first drive electrical connection terminal 41 and the second drive electrical connection terminal 42 are disconnected in an open circuit; when the driving multiplexing time-sharing gate control pin 315 is detected to apply a negative level, the negative level is equivalent to a turn-off touch control signal applied to the touch controlled terminal 23, the first touch electrical connection terminal 21 and the second touch electrical connection terminal 22 are open-circuited and disconnected, meanwhile, the positive level applied to the driving controlled terminal 43 is equivalent to a turn-on driving control signal applied to the driving controlled terminal 43, and the first driving electrical connection terminal 41 and the second driving electrical connection terminal 42 are turned on. It is apparent that the second embodiment of the present invention further reduces the pins of the data processing chip 3.
The data processing chip 3 may be a data processing chip only used for completing touch detection and control, in this case, another data processing chip only used for completing liquid crystal display driving control should be further provided for the embedded self-capacitance touch liquid crystal display device, and the two data processing chips are independently provided. The data processing chip 3 can also be a data processing chip 3 which adopts an IDC scheme or a TDDI scheme and can complete the liquid crystal display driving control process and the touch detection and control process in a time-sharing manner. Eighth to tenth embodiments of the present invention provide a data processing chip 3 for performing the liquid crystal display driving control process and the touch detection and control process in a time-sharing manner on the basis of the sixth embodiment, respectively. The data processing chip 3 is used for both touch detection and control and liquid crystal display drive control, and is also provided with a common level module 323 that outputs a common level for liquid crystal display. When the data processing chip 3 is used for touch detection and control, the touch module 321 is electrically connected to all multiplexing electrodes 1 by means of the touch controlled switching device 2; when the data processing chip 3 is used for liquid crystal display drive control, the common level block 323 electrically connects the multiplexing electrodes 1.
An eighth embodiment of the present invention is based on the sixth embodiment, as shown in fig. 8, the data processing chip 3 controls the touch module 321 and the common level module 323 to electrically connect the touch pins 311 in a time-sharing manner, and when the data processing chip 3 is used for touch detection and control, the touch pins 311 are connectedThe K1 signals are controlled to be electrically connected to the touch module 321 for outputting touch signals; when the data processing chip 3 is used for driving and controlling the liquid crystal display, the touch pins 311 are all controlled by K2 to be electrically connected with the common level module 323 for outputting the common level Vcom. The technical means added to the sixth embodiment of the present invention in the eighth embodiment is also applicable to the fifth embodiment.
A ninth embodiment of the present invention is based on the sixth embodiment, and as shown in fig. 9, the data processing chip 3 controls the driving signal module 322 and the common level module 323 to be electrically connected to the driving signal pin 313 in a time-sharing manner. When the data processing chip 3 is used for touch detection and control, the driving signal pins 313 are all controlled to be electrically connected with the driving signal module 322 through the K3 for outputting driving signals; when the data processing chip 3 is used for liquid crystal display driving control, the driving signal pins 313 are all controlled to be electrically connected to the common level block 323 through K4 for outputting the common level Vcom。
Tenth embodiment of the invention combines the eighth embodiment with the ninth embodiment, as shown in fig. 10, the data processing chip 3 controls the touch module 321 and the common level module 323 to be electrically connected to the touch pins 311 in a time-sharing manner, and controls the driving signal module 322 and the common level module 323 to be electrically connected to the driving signal pins 313 in a time-sharing manner. When used for liquid crystal display, the common level V is outputted to the multiplex electrode 1 in two partscom. When the data processing chip 3 is used for touch detection and control, the touch pins 311 are controlled by the K1 to be electrically connected to the touch module 321 for outputting touch signals, and the driving signal pins 313 are controlled by the K3 to be electrically connected to the driving signal module 322 for outputting driving signals; when the data processing chip 3 is used for driving control of the liquid crystal display, the touch pins 311 are all controlled to be electrically connected with the common level module 323 through K2 for outputting a common level V to the multiplexing electrodes 1 of the first partcomThe driving signal pins 313 are all controlled to be electrically connected with the common level block 323 through K4 for outputting the common level V to the multiplexing electrodes 1 of the second partcom. The first part multiplexing electrode 1 and the second part multiplexing electrode 1 can be two groups of multiplexing electrodes 1, or can be two areas on the touch screen body. In a tenth embodiment of the present invention, a first partially multiplexed electrodeThe 1 and the second part multiplexing electrode 1 are respectively a multiplexing electrode 1 arranged on the upper half part of the touch screen body and a multiplexing electrode 1 arranged on the lower half part of the touch screen body. The technical means added to the sixth embodiment of the present invention is also applicable to the fifth embodiment.
In addition, the present invention also provides a solution of separately setting a common level pin, which is not shown in the figure, and the data processing chip 3 is further provided with at least one common level pin. The multiplexing electrodes 1 are all electrically connected with the same common level pin through the TFT switch, or the multiplexing electrodes 1 are grouped and respectively electrically connected with the common level pins. When the data processing chip is used for driving and controlling the liquid crystal display, the common level module is electrically connected with each common level pin so as to be electrically connected with all the multiplexing electrodes 1.
The layout scheme of the multiplexing electrode 1 adopted in the fourth embodiment of the present invention can also be applied to the fifth to eleventh embodiments of the present invention to optimize the user experience of the quick scribe touch operation.
Each of the electrical nodes employed in the first embodiment of the present invention corresponds to the connection pins of the fifth to eleventh embodiments. The touch signal electrical node 51 corresponds to the touch pin 311 of the data processing chip 3. The detection time-sharing gating control electrical node 52 corresponds to the detection time-sharing gating control pin 312 of the data processing chip 3. The driving signal electrical node 53 corresponds to the driving signal pin 313 of the data processing chip 3. The driving time-sharing gate control electrical node 54 corresponds to the driving time-sharing gate control pin 314 of the data processing chip 3.
The signals involved in the embodiments of the present invention, such as the touch control signal, the driving control signal, etc., are signals that can be converted in the data processing chip 3 or on the liquid crystal display. But the signal source is a touch module, a driving signal module and a common level module of the data processing chip.
In summary, the present invention further provides an embedded self-capacitance touch lcd device, as shown in fig. 5 to 8, including an embedded self-capacitance touch lcd panel and a data processing chip 3 at least used for touch detection and control. The embedded self-capacitance touch liquid crystal display screen body comprises a multiplexing electrode 1 of a self-capacitance electrode plate for detecting screen touch action and a common level electrode plate for liquid crystal display, and a touch controlled switch device 2 respectively configured for each multiplexing electrode 1. The time period for executing the touch action of the detection screen is defined as a touch time period, and the time period for executing the liquid crystal display is defined as a display time period. The touch-controlled switch device 2 includes a first touch electrical connection end 21, a second touch electrical connection end 22, and a touch-controlled end 23 capable of connecting or disconnecting the first touch electrical connection end 21 and the second touch electrical connection end 22. The touch controlled terminal 23 is configured to receive a touch control signal, where the touch control signal includes an on touch control signal and an off touch control signal. When the touch controlled end 23 receives the on-touch control signal, the first touch electrical connection end 21 and the second touch electrical connection end 22 are connected, and when the touch controlled end 23 receives the off-touch control signal, the first touch electrical connection end 21 and the second touch electrical connection end 22 are disconnected. The data processing chip 3 is provided with a touch module 321 for touch detection and control, and at least one touch pin 311. When the data processing chip 3 is used for touch detection and control, the touch pins 311 are electrically connected to the touch module 321 for outputting touch signals. The touch-controlled switching devices 2 are divided into N touch groups, N being a natural number not less than 2, preferably N being less than 20, so that the multiplexing electrodes 1 are also divided into N touch groups. The first touch electrical connection terminals 21 of the touch controlled switch devices 2 are electrically connected to the respective multiplexing electrodes 1, and the second touch electrical connection terminals 22 of the touch controlled switch devices 2 of the same touch group are electrically connected to the different touch pins 311 of the data processing chip 3, respectively. The touch time period includes N touch time slices, so that, when the data processing chip 3 is used for touch detection and control, the touch controlled terminal 23 of the touch controlled switch device 2 of each touch group receives the conducting touch control signal in the touch time slices, each touch time slice selects the multiplexing electrode of one touch group to perform touch detection, and each multiplexing electrode 1 of the same touch group is electrically connected to the touch module 321 in one touch time slice. In the fifth embodiment of the present invention, as shown in fig. 5, an embedded self-capacitance touch lcd panel body composed of 10 multiplexing electrodes 1 adopts N =5, that is, 10 multiplexing electrodes 1 are divided into 5 touch groups G1, G2, G3, G4 and G5, and each touch group has two multiplexing electrodes 1, so that the data processing chip 3 only needs to be provided with 2 touch pins 311.
In the fifth to eleventh embodiments of the present invention, the touch-controlled switching device 2 is a thin film transistor TFT. One of the source and drain electrodes of the thin film transistor TFT serves as a first touch electrical connection terminal 21, the other serves as a second touch electrical connection terminal 22, and the gate electrode of the thin film transistor serves as a touch controlled terminal 23. The thin film transistor TFT is used as the touch controlled switch device 2, which is easy to implement and has low cost, so that the invention can implement a scheme of reducing the touch pins 311 at low cost.
The data processing chip 3 is further provided with at least one detection time-sharing gating control pin 312 for outputting a touch control signal to the touch controlled terminal 23. In order to prevent the situation that the control signal is not easy to detect due to a failure and prevent a failed control signal from being masked by a plurality of normal control signals, a ninth embodiment of the present invention provides a scheme for reducing the grouping of the touch pins and the control signals based on the fifth embodiment, which is not shown in the drawing, and the touch controlled switch devices 2 of each touch group are respectively grouped, so that the touch controlled switch devices 2 of the nth touch group are divided into M groupsnGroup control signal group, N is variable, N =1, 2, …, N, and M1、M2、…MNAre all natural numbers. The touch controlled terminals 23 of the touch controlled switch devices 2 of the same control signal group are electrically connected to the same detection time-sharing gating control pin 312 of the data processing chip 3. In the fifth to eighth embodiments of the present invention, as shown in fig. 5 to 8, respectively, which are a case of the ninth embodiment that it is easier to control the on touch control signal, 5 touch groups G1, G2, G3, G4 and G5 are provided, and the touch-controlled switch devices 2 of each touch group are divided into 1 group of control signal groups, i.e., N =5, M1=M2= M3= M4= M5=1。
In order to suppress the substrate capacitance interference, a sixth embodiment of the present invention is based on the fifth embodiment, and as shown in fig. 6, the embedded self-capacitance touch lcd further includes a driving controlled switching device 4 configured for each multiplexing electrode. The data processing chip 3 is further provided with a driving signal module 322 capable of outputting a driving signal for suppressing the substrate capacitance interference, and at least one driving signal pin 313, and the driving signal pin 313 is electrically connected to the driving signal module 322 for outputting the driving signal. The drive controlled switching device 4 includes a first drive electrical connection terminal 41, a second drive electrical connection terminal 42, and a drive controlled terminal 43 capable of connecting or disconnecting the first drive electrical connection terminal 41 and the second drive electrical connection terminal 42. The driving controlled terminal 43 is used for receiving driving control signals, which include an on driving control signal and an off driving control signal. When the driving controlled end 43 receives the on-driving control signal, the first driving electrical connection end 41 is connected to the second driving electrical connection end 42, and conversely, when the driving controlled end 43 receives the off-driving control signal, the first driving electrical connection end 41 is disconnected from the second driving electrical connection end 42. The on-drive control signal and the off-drive control signal are set to a high level or a low level according to device characteristics, and when the on-drive control signal is active at the high level, the off-drive control signal is active at the low level; conversely, when the on drive control signal is active low, the off drive control signal is active high. The first driving electrical connection terminal 41 of the driving controlled switch device 4 is electrically connected to the multiplexing electrode 1 configured respectively, and the second driving electrical connection terminal 42 is electrically connected to the driving signal circuit pin 313. When the data processing chip 3 is used for touch detection and control, the multiplexing electrode 1 electrically connected to the touch module 321 is in a touch enabled state; the multiplexing electrode 1 which is not electrically connected with the touch module 321 is in a floating state. And applying a conducting driving control signal to the driving controlled end 43 of the driving controlled switching device 4, so that the driven signal module 322 of the multiplexing electrode 1 in the floating state around the multiplexing electrode 1 in the touch enabling state inputs a driving signal through the driving signal pin 313, or all the driven signal modules 322 of the multiplexing electrode 1 in the floating state input a driving signal through the driving signal pin 313, thereby suppressing the capacitive interference on the multiplexing electrode 1 in the touch enabling state.
In order to realize the solutions at low cost as described above, the sixth to eleventh embodiments of the present invention, as shown in fig. 6 to 10, respectively, the drive-controlled switching device 4 is a thin film transistor TFT. One of the source and drain electrodes of the thin film transistor TFT serves as a first drive electrical connection terminal 41 and the other serves as a second drive electrical connection terminal 42, with the gate electrode of the thin film transistor serving as a drive controlled terminal 43. The thin film transistor TFT is adopted as the drive controlled switch device 4, the scheme is easy to realize and has low cost, so that the scheme of reducing pins of a data processing chip can be realized at low cost.
As a specific implementation of the driving signal module, the driving signal module 322 includes a voltage follower, which is not shown in the figure. The voltage follower may specifically employ an operational amplifier. The touch signal output by the touch module 321 is input to the non-inverting input terminal of the voltage follower. The output end of the voltage follower is electrically connected with the inverting input end and used for outputting a driving signal. The touch signal and the driving signal are synchronized through the voltage follower so as to eliminate the voltage difference of the substrate capacitor.
As shown in fig. 6 to 10, in order to facilitate the coordination control of the touch signal and the driving signal, the data processing chip 3 is further provided with a driving time-sharing gating control pin 314 for applying the driving control signal to the driving controlled terminal according to the sixth to eleventh embodiments of the present invention. The driving controlled terminals 43 of the driving controlled switching devices 4 configured to the multiplexing electrodes 1 of the same touch group are all electrically connected to the same driving time-sharing gating control pin 314, so that the driving controlled switching devices 4 are divided into N groups of driving control groups, thereby further reducing the pin number of the data processing chip 3.
In the seventh embodiment of the present invention, the data processing chip 3 is further provided with a detection driving multiplexing time-sharing gating control pin 315, and the detection driving multiplexing time-sharing gating control pin 315 is used for applying a touch control signal to the touch controlled terminal 23 or applying a driving control signal to the driving controlled terminal 43. The detection driving multiplexing time-sharing gating control pin 315 is electrically connected to the touch controlled terminal 23 of the touch switch device 2 and the driving controlled terminal 43 of the driving controlled switch device 4. In the seventh embodiment of the present invention, a detection driving multiplexing time-sharing gating control pin 315 is electrically connected to the touch controlled terminal 23 of the touch switch device 2 of a touch group and the driving controlled terminal 43 of the driving controlled switch device 4 of the touch group. In the seventh embodiment of the present invention, the above electrical connection is accomplished by means of a logic not gate 6. A detection driving multiplexing time-sharing gating control pin 315 is electrically connected to all the touch controlled terminals 23 of the same touch group and one end of a not gate 6, and the other end of the not gate 6 is electrically connected to all the driving controlled terminals 43 of the touch group. When the detection drive multiplexing time-sharing gating control pin 315 applies a positive voltage, the positive voltage is equivalent to a conducting touch control signal applied to the touch controlled terminal 23, the first touch electrical connection terminal 21 and the second touch electrical connection terminal 22 are conducted, meanwhile, the negative voltage applied to the drive controlled terminal 43 is equivalent to a disconnecting drive control signal applied to the drive controlled terminal 43, and the first drive electrical connection terminal 41 and the second drive electrical connection terminal 42 are disconnected in an open circuit; when the driving multiplexing time-sharing gate control pin 315 is detected to apply a negative level, the negative level is equivalent to a turn-off touch control signal applied to the touch controlled terminal 23, the first touch electrical connection terminal 21 and the second touch electrical connection terminal 22 are open-circuited and disconnected, meanwhile, the positive level applied to the driving controlled terminal 43 is equivalent to a turn-on driving control signal applied to the driving controlled terminal 43, and the first driving electrical connection terminal 41 and the second driving electrical connection terminal 42 are turned on. It is apparent that the second embodiment of the present invention further reduces the pins of the data processing chip 3.
Eighth embodiment of the present invention, based on the sixth embodiment, as shown in fig. 8, the data processing chip 3 is also used for liquid crystal display driving control, and is further provided with a common level V for outputting for liquid crystal displaycomThe common level module 323. The data processing chip 3 controls the touch module 321 and the common level module 323 to be electrically connected with the touch pins 311 in a time-sharing manner, and when the data processing chip 3 is used for touch detection and control, the touch pins 311 are controlled to be electrically connected with the touch module 321 through K1 for outputting touch signals; when the data processing chip is used for driving and controlling the liquid crystal display, the touch pins 311 are all controlled by K2 to be electrically connected with the common level module 323 for outputting the common level Vcom. The multiplexing of the touch pins 311 by the touch module 321 and the common level module 323 is schematically illustrated in fig. 7 by controlled switches K1, K2. The controlled switches K1, K2 may be implemented in hardware or in a software program within the data processing chip 3. Hair brushThe technical means added to the sixth embodiment to explain the eighth embodiment is also applied to the fifth embodiment.
Based on the sixth embodiment, a ninth embodiment of multiplexing the driving signal pin 313 is proposed, as shown in fig. 9, the data processing chip 3 is further used for driving and controlling the liquid crystal display, and is further provided with a common level V for outputting to the liquid crystal displaycomThe common level module 323. The data processing chip 3 controls the driving signal module 322 and the common level module 323 to be electrically connected with the driving signal pin 313 in a time-sharing manner, and when the data processing chip 3 is used for touch detection and control, the driving signal pin 313 is controlled by K3 to be electrically connected with the driving signal module 322 for outputting a driving signal; when the data processing chip 3 is used for liquid crystal display driving control, the driving signal pins 313 are all controlled to be electrically connected to the common level block 323 through K4 for outputting the common level Vcom。
In addition, the invention also provides a scheme for independently setting the common level pin, and the data processing chip 3 is also provided with at least one common level pin. The multiplexing electrodes 1 are all electrically connected with the same common level pin, or the multiplexing electrode groups are respectively electrically connected with the common level pins. When the data processor 3 is used for liquid crystal display drive control, the common level module electrically connects the common level pins, thereby electrically connecting all the multiplexing electrodes.
Tenth embodiment of the invention combines the eighth embodiment with the ninth embodiment, as shown in fig. 10, the data processing chip 3 controls the touch module 321 and the common level module 323 to be electrically connected to the touch pins 311 in a time-sharing manner, and controls the driving signal module 322 and the common level module 323 to be electrically connected to the driving signal pins 313 in a time-sharing manner. When used for liquid crystal display, the common level V is outputted to the multiplex electrode 1 in two partscom. When the data processing chip 3 is used for touch detection and control, the touch pins 311 are controlled by the K1 to be electrically connected to the touch module 321 for outputting touch signals, and the driving signal pins 313 are controlled by the K3 to be electrically connected to the driving signal module 322 for outputting driving signals; when the data processing chip 3 is used for driving and controlling the liquid crystal display, the touch pins 311 are all controlled to be electrically connected with the common level module 323 through K2 for outputting common to the multiplexing electrodes 1 of the first partBy level VcomThe driving signal pins 313 are all controlled to be electrically connected with the common level block 323 through K4 for outputting the common level V to the multiplexing electrodes 1 of the second partcom. The technical means added to the sixth embodiment of the present invention is also applicable to the fifth embodiment.
The layout scheme of the multiplexing electrode 1 adopted in the fourth embodiment of the present invention can also be applied to the fifth to eleventh embodiments of the present invention to optimize the user experience of the quick scribe touch operation. The data processing chip 3 is further provided with a detection time-sharing gating control pin 312 for applying a touch control signal to the touch controlled terminal 23. The multiplexing electrodes 1 of the N groups of touch groups are distributed in more than two blocks. Multiplexing electrodes 1 belonging to each touch group are arranged in any block. And setting time slice sequence numbers for the touch time slices, and setting the touch groups where the multiplexing electrodes gated by the touch time slices are located as group numbers with the same time slice sequence numbers. The arrangement of the multiplexing electrodes meets the condition that the group numbers of the touch groups of any two adjacent multiplexing electrodes are the same or have one difference. The touch controlled terminals 23 of the touch switch devices 2 of the same touch group in each block are electrically connected to the same detection time-sharing gating control pin 312.
The electrical node employed in the first embodiment of the present invention corresponds to a connection pin applied to the data processing chip of the fifth to eleventh embodiments. The touch signal electrical node 51 corresponds to the touch pin 311 of the data processing chip 3. The detection time-sharing gating control electrical node 52 corresponds to the detection time-sharing gating control pin 312 of the data processing chip 3. The driving signal electrical node 53 corresponds to the driving signal pin 313 of the data processing chip 3. The driving time-sharing gate control electrical node 54 corresponds to the driving time-sharing gate control pin 314 of the data processing chip 3.

Claims (21)

1. An embedded self-capacitance touch liquid crystal display screen body is characterized in that:
the multiplexing electrode is used as a self-capacitance electrode plate for detecting screen touch actions and a common level electrode plate for liquid crystal display, and a time period for executing the detection of the screen touch actions is defined as a touch time period, and a time period for executing the liquid crystal display is defined as a display time period; the touch control controlled switch device is respectively configured for each multiplexing electrode; the display screen body is provided with at least one touch signal electrical node for introducing a touch control signal from the outside of the display screen body;
the touch controlled switch device comprises a first touch electric connection end, a second touch electric connection end and a touch controlled end which can enable the first touch electric connection end and the second touch electric connection end to be connected or disconnected; when the touch controlled end receives the conduction touch control signal, the first touch electric connection end is conducted with the second touch electric connection end;
the touch controlled switch device is divided into N groups of touch groups, N is a natural number not less than 2, and therefore the multiplexing electrodes are also divided into N groups of touch groups; the first touch control electric connection ends of the touch control switch devices are electrically connected with the multiplexing electrodes configured respectively, and the second touch control electric connection ends of the touch control switch devices in the same touch control group are electrically connected with a touch control signal electric node respectively; the touch time period includes N touch time slices, such that,
the touch control end of the touch controlled switch device of each touch group receives a conducting touch control signal in a touch time slice mode, each touch time slice gates the multiplexing electrodes of one touch group to execute touch detection, and each multiplexing electrode of the same touch group is respectively and electrically connected with each touch signal electric node in one touch time slice;
the driving controlled switching device is respectively configured for each multiplexing electrode;
the display screen body is also provided with a driving signal electrical node for introducing a driving signal from the outside of the display screen body, and the driving signal can be used for inhibiting substrate capacitance interference;
the drive controlled switch device comprises a first drive electric connection end, a second drive electric connection end and a drive controlled end which can enable the first drive electric connection end and the second drive electric connection end to be connected or disconnected; when the drive controlled end receives the conduction drive control signal, the first drive electric connection end is conducted with the second drive electric connection end;
the first driving electric connection ends of the driving controlled switch device are electrically connected with the multiplexing electrodes configured respectively, and the second driving electric connection ends are electrically connected with the driving signal electric nodes;
the display screen body is also provided with a detection driving multiplexing time-sharing gating control electrical node which is used for applying a touch control signal to the touch controlled end or applying a driving control signal to the driving controlled end;
the detection driving multiplexing time-sharing gating control electrical node is electrically connected with the touch controlled end of the touch switch device and the driving controlled end of the driving controlled switch device.
2. The embedded self-capacitance touch liquid crystal display screen body according to claim 1, wherein:
the touch controlled switching device is a thin film transistor.
3. The embedded self-capacitance touch liquid crystal display screen body according to claim 1, wherein:
the display screen body is also provided with a detection time-sharing gating control electrical node used for introducing a touch control signal applied to a touch controlled end from the outside of the display screen body;
grouping the touch-controlled switch devices in the touch group, so that the touch-controlled switch devices in the nth touch group are divided into MnGroup control signal group, N is variable, N =1, 2, …, N, M1、M2、…MNAre all natural numbers;
and the touch controlled ends of the touch controlled switch devices of the same control signal group are electrically connected with the same detection time-sharing gating control electrical node.
4. The embedded self-capacitance touch liquid crystal display screen body according to claim 1, wherein:
the drive controlled switching device is a thin film transistor.
5. The embedded self-capacitance touch liquid crystal display screen body according to claim 1, wherein:
the display screen body is also provided with a driving time-sharing gating control electrical node used for introducing a driving control signal applied to a driving controlled end from the outside of the display screen body;
the driving controlled ends of the driving controlled switching devices configured on the multiplexing electrodes of the same touch group are electrically connected with the same driving time-sharing gating control electrical node, so that the driving controlled switching devices are divided into N groups of driving control groups.
6. The embedded self-capacitance touch liquid crystal display screen body according to claim 1 or 3, wherein:
the display screen body is also provided with a detection time-sharing gating control electrical node used for introducing a touch control signal applied to a touch controlled end from the outside of the display screen body;
the multiplexing electrodes of the N groups of touch groups are distributed in more than two blocks;
multiplexing electrodes which belong to each touch group are arranged in any block;
setting time slice sequence numbers for the touch time slices, and setting the touch groups where the multiplexing electrodes gated by the touch time slices are located as group numbers with the same time slice sequence numbers; the arrangement of the multiplexing electrodes meets the condition that the group numbers of the touch groups of any two adjacent multiplexing electrodes are the same or have a difference of one;
the touch controlled ends of the touch switch devices of the same touch group in each block are electrically connected with the same detection time-sharing gating control electrical node.
7. A data processing chip is used for an embedded self-capacitance touch liquid crystal display device, and is characterized in that:
the touch control device comprises a touch control module for touch detection and control and at least one touch control pin; when the data processing chip is used for touch detection and control, the touch pins are electrically connected with the touch module and used for outputting touch signals;
the embedded self-capacitance touch liquid crystal display device also comprises an embedded self-capacitance touch liquid crystal display body; the embedded self-capacitance touch liquid crystal display screen body comprises multiplexing electrodes which are used as self-capacitance electrode plates for detecting screen touch actions and common level electrode plates for liquid crystal display, and touch controlled switch devices which are respectively configured for each multiplexing electrode; defining a time period for executing the touch action of the detection screen as a touch time period, and defining a time period for executing the liquid crystal display as a display time period;
the touch controlled switch device comprises a first touch electric connection end, a second touch electric connection end and a touch controlled end which can enable the first touch electric connection end and the second touch electric connection end to be connected or disconnected; when the touch controlled end receives the conduction touch control signal, the first touch electric connection end is conducted with the second touch electric connection end;
the touch controlled switch device is divided into N groups of touch groups, N is a natural number not less than 2, and therefore the multiplexing electrodes are also divided into N groups of touch groups; the first touch control electric connection ends of the touch control switch devices of the same touch control group are electrically connected with the multiplexing electrodes configured respectively, and the second touch control electric connection ends of the touch control switch devices of the same touch control group are electrically connected with the touch control pins of the data processing chip respectively; the touch time period includes N touch time slices, such that,
when the data processing chip is used for touch detection and control, after the touch controlled end of the touch controlled switch device of each touch group receives a conducting touch control signal in a touch time slice manner, each touch time slice selects the multiplexing electrodes of one touch group to execute touch detection, and each multiplexing electrode of the same touch group is electrically connected with the touch module in one touch time slice;
the driving signal pin is electrically connected with the driving signal module and used for outputting a driving signal;
the embedded self-capacitance touch liquid crystal display screen body also comprises a drive controlled switch device which is respectively configured for each multiplexing electrode;
the drive controlled switch device comprises a first drive electric connection end, a second drive electric connection end and a drive controlled end which can enable the first drive electric connection end and the second drive electric connection end to be connected or disconnected; when the drive controlled end receives the conduction drive control signal, the first drive electric connection end is conducted with the second drive electric connection end;
the first driving electric connection end of the driving controlled switch device is electrically connected with the multiplexing electrode configured respectively, and the second driving electric connection end is electrically connected with the driving signal pin;
when the data processing chip is used for touch detection and control, the multiplexing electrode electrically connected with the touch module is in a touch starting state; multiplex electrodes which are not electrically connected with the touch module are in a suspended state; applying a conducting drive control signal to a drive controlled end of a drive controlled switch device, so that the multiplex electrodes in the suspended state around the multiplex electrodes in the touch enabled state are input with a drive signal by a drive signal module, or all the multiplex electrodes in the suspended state are input with a drive signal by the drive signal module, thereby inhibiting the capacitance interference on the multiplex electrodes in the touch enabled state;
the detection driving multiplexing time-sharing gating control pin is used for applying a touch control signal to the touch controlled end or applying a driving control signal to the driving controlled end;
the detection driving multiplexing time-sharing gating control pin is electrically connected with a touch controlled end of the touch switch device and a driving controlled end of the driving controlled switch device.
8. The data processing chip of claim 7, wherein:
the touch controlled switching device is a thin film transistor.
9. The data processing chip of claim 7, wherein:
the touch control device is also provided with at least one detection time-sharing gating control pin for outputting a touch control signal to the touch controlled end;
grouping the touch controlled switch devices of each touch group respectively to divide the touch controlled switch devices of the nth touch group into MnGroup control signal group, N is variable, N =1, 2, …, N, M1、M2、…MNAre all natural numbers;
and the touch controlled end of the touch controlled switch device of the same control signal group is electrically connected with the same detection time-sharing gating control pin of the data processing chip.
10. The data processing chip of claim 7, wherein:
the drive controlled switching device is a thin film transistor.
11. The data processing chip of claim 7, wherein:
the driving signal module comprises a voltage follower; a touch signal output by the touch module is input to a non-inverting input end of the voltage follower; the output end of the voltage follower is electrically connected with the inverting input end and used for outputting a driving signal.
12. The data processing chip of claim 7, wherein:
the driving time-sharing gating control pin is used for applying a driving control signal to the driving controlled end;
the driving controlled ends of the driving controlled switching devices configured on the multiplexing electrodes of the same touch group are electrically connected with the same driving time-sharing gating control pin, so that the driving controlled switching devices are divided into N groups of driving control groups.
13. An embedded self-capacitance touch liquid crystal display device is characterized in that:
the touch screen comprises an embedded self-capacitance touch liquid crystal display screen body and a data processing chip at least used for touch detection and control;
the embedded self-capacitance touch liquid crystal display screen body comprises self-capacitance electrode plates for detecting screen touch actions, multiplexing electrodes of a common level electrode plate for liquid crystal display and touch controlled switch devices respectively configured for each multiplexing electrode; defining a time period for executing the touch action of the detection screen as a touch time period, and defining a time period for executing the liquid crystal display as a display time period;
the touch controlled switch device comprises a first touch electric connection end, a second touch electric connection end and a touch controlled end which can enable the first touch electric connection end and the second touch electric connection end to be connected or disconnected; when the touch controlled end receives the conduction touch control signal, the first touch electric connection end is conducted with the second touch electric connection end;
the data processing chip is provided with a touch module for touch detection and control and at least one touch pin; when the data processing chip is used for touch detection and control, the touch pins are electrically connected with the touch module and used for outputting touch signals;
the touch controlled switch device is divided into N groups of touch groups, N is a natural number not less than 2, and therefore the multiplexing electrodes are also divided into N groups of touch groups; the first touch control electric connection ends of the touch control switch devices of the same touch control group are electrically connected with the multiplexing electrodes configured respectively, and the second touch control electric connection ends of the touch control switch devices of the same touch control group are electrically connected with the touch control pins of the data processing chip respectively; the touch time period includes N touch time slices, such that,
when the data processing chip is used for touch detection and control, after the touch controlled end of the touch controlled switch device of each touch group receives a conducting touch control signal in a touch time slice manner, each touch time slice selects the multiplexing electrodes of one touch group to execute touch detection, and each multiplexing electrode of the same touch group is electrically connected with the touch module in one touch time slice;
the embedded self-capacitance touch liquid crystal display screen body also comprises a drive controlled switch device which is respectively configured for each multiplexing electrode;
the data processing chip is also provided with a driving signal module capable of outputting a driving signal for inhibiting the interference of the substrate capacitor and at least one driving signal pin, and the driving signal pins are electrically connected with the driving signal module and used for outputting the driving signal;
the drive controlled switch device comprises a first drive electric connection end, a second drive electric connection end and a drive controlled end which can enable the first drive electric connection end and the second drive electric connection end to be connected or disconnected; when the drive controlled end receives the conduction drive control signal, the first drive electric connection end is conducted with the second drive electric connection end;
the first driving electric connection end of the driving controlled switch device is electrically connected with the multiplexing electrode configured respectively, and the second driving electric connection end is electrically connected with the driving signal pin;
when the data processing chip is used for touch detection and control, the multiplexing electrode electrically connected with the touch module is in a touch starting state; multiplex electrodes which are not electrically connected with the touch module are in a suspended state; applying a conducting drive control signal to a drive controlled end of a drive controlled switch device, so that the multiplex electrodes in the suspended state around the multiplex electrodes in the touch enabled state are input with a drive signal by a drive signal module, or all the multiplex electrodes in the suspended state are input with a drive signal by the drive signal module, thereby inhibiting the capacitance interference on the multiplex electrodes in the touch enabled state;
the data processing chip is also provided with a detection driving multiplexing time-sharing gating control pin, and the detection driving multiplexing time-sharing gating control pin is used for applying a touch control signal to a touch controlled end or applying a driving control signal to a driving controlled end;
the detection driving multiplexing time-sharing gating control pin is electrically connected with a touch controlled end of the touch switch device and a driving controlled end of the driving controlled switch device.
14. The embedded self-capacitance touch liquid crystal display device according to claim 13, wherein:
the touch controlled switching device is a thin film transistor.
15. The embedded self-capacitance touch liquid crystal display device according to claim 13, wherein:
the data processing chip is also provided with at least one detection time-sharing gating control pin for outputting a touch control signal to the touch controlled end;
grouping the touch controlled switch devices of each touch group respectively to divide the touch controlled switch devices of the nth touch group into MnSet of control signals, n being a variable，n=1，2，…，N，M1、M2、…MNAre all natural numbers;
and the touch controlled ends of the touch controlled switch devices of the same control signal group are electrically connected with the same touch control pin of the data processing chip.
16. The embedded self-capacitance touch liquid crystal display device according to claim 13, wherein:
the drive controlled switching device is a thin film transistor.
17. The embedded self-capacitance touch liquid crystal display device according to claim 13, wherein:
the driving signal module comprises a voltage follower; a touch signal output by the touch module is input to a non-inverting input end of the voltage follower; the output end of the voltage follower is electrically connected with the inverting input end and used for outputting a driving signal.
18. The embedded self-capacitance touch liquid crystal display device according to claim 13, wherein:
the data processing chip is also provided with a driving time-sharing gating control pin for applying a driving control signal to the driving controlled end;
the driving controlled ends of the driving controlled switching devices configured on the multiplexing electrodes of the same touch group are electrically connected with the same driving time-sharing gating control pin, so that the driving controlled switching devices are divided into N groups of driving control groups.
19. The embedded self-capacitance touch liquid crystal display device according to claim 13, wherein:
the data processing chip is also used for liquid crystal display drive control and is also provided with a common level module for outputting a common level for liquid crystal display;
the data processing chip controls the touch module and the common level module to be electrically connected with the touch pins in a time-sharing manner,
when the data processing chip is used for touch detection and control, the touch pins are controlled to be electrically connected with the touch module and used for outputting touch signals; when the data processing chip is used for driving and controlling the liquid crystal display, the touch pins are electrically connected with the common level module and are used for outputting a common level.
20. The embedded self-capacitance touch liquid crystal display device according to claim 13, wherein:
the data processing chip is also used for liquid crystal display drive control and is also provided with a common level module for outputting a common level for liquid crystal display;
the data processing chip controls the driving signal module and the public level module to be electrically connected with the driving signal pin in a time-sharing manner,
when the data processing chip is used for touch detection and control, the driving signal pins are controlled to be electrically connected with the driving signal module and used for outputting driving signals; when the data processing chip is used for driving and controlling the liquid crystal display, the driving signal pins are all electrically connected with the common level module and are used for outputting the common level.
21. The embedded self-capacitance touch liquid crystal display device according to claim 13 or 15, wherein:
the data processing chip is also provided with a detection time-sharing gating control pin for applying a touch control signal to the touch controlled end;
the multiplexing electrodes of the N groups of touch groups are distributed in more than two blocks;
multiplexing electrodes which belong to each touch group are arranged in any block;
setting time slice sequence numbers for the touch time slices, and setting the touch groups where the multiplexing electrodes gated by the touch time slices are located as group numbers with the same time slice sequence numbers; the arrangement of the multiplexing electrodes meets the condition that the group numbers of the touch groups of any two adjacent multiplexing electrodes are the same or have a difference of one;
the touch controlled ends of the touch switch devices of the same touch group in each block are electrically connected with the same detection time-sharing gating control pin.
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