CN107092388A - Touch control display apparatus and its driving method - Google Patents
Touch control display apparatus and its driving method Download PDFInfo
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- CN107092388A CN107092388A CN201710236770.XA CN201710236770A CN107092388A CN 107092388 A CN107092388 A CN 107092388A CN 201710236770 A CN201710236770 A CN 201710236770A CN 107092388 A CN107092388 A CN 107092388A
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- 238000000034 method Methods 0.000 title claims description 22
- 238000001514 detection method Methods 0.000 claims abstract description 39
- 230000005611 electricity Effects 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 10
- 230000003071 parasitic effect Effects 0.000 description 7
- 239000013078 crystal Substances 0.000 description 6
- 229920001621 AMOLED Polymers 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 229910017435 S2 In Inorganic materials 0.000 description 1
- 238000013499 data model Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
A kind of touch control display apparatus is disclosed, including：Touch-control display panel, including a plurality of gate line, a plurality of data lines, the pixel cell of multiple pixel regions, the Organic Light Emitting Diode of multiple pixel regions and the multiple cathode electrodes set corresponding to multiple pixel regions；Power module, is connected with touch-control display panel, for providing first voltage and second voltage to touch-control display panel；Wherein, pixel is connected to gate line, data wire, first voltage and second voltage；Driver module, for controlling sense channel to be connected with second voltage under dispaly state, and provides scanning signal and data-signal to drive touch-control display panel to show to touch-control display panel；Touch control detection module, the inductance capacitance for detecting touch-control display panel by sense channel under touch-control state.OLED cathode electrode is connected by the present invention with sense channel, and sense channel is multiplexed under dispaly state and realizes display, makes touch control display apparatus more frivolous, while cost-effective.
Description
Technical field
The present invention relates to for capacitive sensing identification technology field, more particularly, to a kind of touch control display apparatus and its
Driving method.
Background technology
In Display Technique, organic light emitting diode display (Organic Light Emitting Diode, OLED)
So that its is frivolous, actively many merits such as luminous, fast-response speed, wide viewing angle, rich color and high brightness, high-low temperature resistant and by industry
Boundary is known as being the third generation Display Technique after liquid crystal display (Liquid Crystal Display, LCD).Wherein,
Active matrix organic light-emitting (Active Matrix OLED, AMOLED) can realize the large scale of panel, high-resolution design,
Focus as current research.
Touch module is arranged on the glass substrate upper surface of display module by present AMOLED display device mostly, and touches
Chip is controlled with display driver chip using two different chips.Due to touch module and display module separation and adopt respectively
Touch-control and display are controlled with different chips, the space-consuming that result in AMOLED display device is big, thickness is larger, Yi Jicheng
This height.
The content of the invention
Therefore, The embodiment provides a kind of touch control display apparatus and its driving method.
According to an aspect of the present invention there is provided a kind of touch control display apparatus, including：Touch-control display panel, including it is a plurality of
Gate line, a plurality of data lines, the pixel cell of multiple pixel regions, the Organic Light Emitting Diode of multiple pixel regions and right
The multiple cathode electrodes that should be set in multiple pixel regions；Power module, is connected with the touch-control display panel, for described
Touch-control display panel provides first voltage and second voltage；Wherein, the pixel region is connected to the gate line, the data
Line, the first voltage and the second voltage；The multiple cathode electrode is connected with multiple sense channels；Display driving mould
Block, for controlling the sense channel to be connected with the second voltage under dispaly state, and is carried to the touch-control display panel
For scanning signal and data-signal to drive touch-control display panel to show；Touch control detection module, for leading under touch-control state
The inductance capacitance that the sense channel detects the touch-control display panel is crossed, the touch control display apparatus timesharing switches the display
State and the touch-control state.
Preferably, wherein, each pixel cell include the first transistor, second transistor and storage capacitance, wherein, it is described
The gate electrode of the first transistor is connected with a gate line in the gate line, the first electrode of the first transistor and institute
The data line stated in data wire is connected, the second electrode of the first transistor and the gate electrode phase of the second transistor
Even；The gate electrode of the second transistor is connected with the second electrode of the first transistor, and the first of the second transistor
Electrode is connected with the first voltage, the second electrode of the second transistor and the anode phase of the Organic Light Emitting Diode
Even；The storage capacitance is connected between the second electrode of the first transistor and the first voltage.
Preferably, the driver module includes：Gate drivers, for being shown under dispaly state to the touch-control
Panel provides grid voltage；Source electrode driver, for providing gray scale voltage to the touch-control display panel under dispaly state.
Preferably, the touch control detection module includes：Multiplexing Unit, for controlling the sense channel under dispaly state
It is connected with the second voltage；Touch control detection unit, for detecting the touch-control by the sense channel under touch-control state
The inductance capacitance of display panel.
Preferably, the touch control detection unit includes amplifier, feedback capacity, feedback resistance and analog-digital converter, its
In, the amplifier includes first input end, the second input and output end, and first input end is connected with drive signal, and second
Input is connected with Multiplexing Unit, and output end is connected with the analog-digital converter；The feedback capacity and the feedback resistance are simultaneously
Connection is connected between the second input of the amplifier and output end.
Preferably, the first input end is negative input end, and second input is positive input terminal.
Preferably, the first input end is positive input terminal, and second input is negative input end.
Preferably, the Multiplexing Unit includes first switch and second switch, wherein, the first switch is connected to described
Between the second input and sense channel of amplifier；The second switch is connected to the sense channel and the second voltage
Between.
Preferably, when the touch control display apparatus is in dispaly state, first switch is off state, second switch
It is in the conduction state；When the touch control display apparatus is in touch-control state, first switch is in the conduction state, at second switch
In off state.
Preferably, the gate drivers include：Drive element of the grid, for receiving grid malleation and grid negative pressure, and
It is supplied to the touch-control display panel；First electric capacity and the second electric capacity, are connected in series in the grid malleation and the grid is negative
Between pressure, wherein, the node between first electric capacity and second electric capacity is connected with earth terminal.
Preferably, the gate drivers include：Drive element of the grid, for receiving grid malleation and grid negative pressure, and
It is supplied to the touch-control display panel；First electric capacity and the second electric capacity, are connected in series in the grid malleation and the grid is negative
Between pressure, the 3rd switch, between the node and the drive signal that are connected between first electric capacity and second electric capacity；
4th switch, between the node and earth terminal that are connected between first electric capacity and second electric capacity.
Preferably, when the touch control display apparatus is in dispaly state, the 3rd switch is off state, the 4th switch
It is in the conduction state；When the touch control display apparatus is in touch-control state, the 3rd switch is in the conduction state, at the 4th switch
In off state.
Preferably, the source electrode driver includes：Source drive unit, for generating GTG electricity corresponding with display data
Pressure.
Preferably, the source electrode driver also includes：5th switch, is connected to the drive signal and the touch-control is shown
Between panel；6th switch, is connected between the source drive unit and the touch-control display panel.
Preferably, when the touch control display apparatus is in dispaly state, the 5th switch is off state, the 6th switch
It is in the conduction state；When the touch control display apparatus is in touch-control state, the 5th switch is in the conduction state, at the 6th switch
In off state.
Preferably, the touch control display apparatus also includes：Time schedule controller, for the driver module and described
Touch control detection module provides the first control signal and the second control signal respectively, wherein, first control signal is used to control
The touch control display apparatus is in dispaly state；Second control signal is used to control the touch control display apparatus to be in touch-control
State.
Preferably, the touch control display apparatus also includes：Signal source, for providing driving letter to the touch control detection module
Number.
Preferably, the signal source is additionally operable to provide drive signal to the driver module.
Preferably, each pixel cell includes the first transistor, second transistor, third transistor and storage capacitance, its
In, the gate electrode of the first transistor is connected with a gate line in the gate line, and the first of the first transistor
Electrode is connected with the data line in the data wire, the second electrode of the first transistor and the second transistor
Gate electrode is connected；The gate electrode of the second transistor is connected with the second electrode of the first transistor, the second transistor
First electrode is connected with the second electrode of the third transistor, the second electrode of the second transistor and the organic light emission
The anode of diode is connected；The gate electrode of the third transistor is connected with the 3rd control signal, and the of the third transistor
One electrode is connected with the first voltage, the second electrode of the third transistor and the first electrode phase of the second transistor
Even；Storage capacitance is connected between the second electrode of the first transistor and earth terminal.
Preferably, under touch-control state, pulse signal is applied at least one gate line and data wire.
Preferably, the pulse signal includes AC signal or unipolar signal.
Preferably, the AC signal includes sine wave signal or bipolar square wave signal.
Preferably, the unipolar signal includes unipolarity square-wave signal.
According to another aspect of the present invention there is provided a kind of driving method of touch control display apparatus described above, including：Point
When switching dispaly state and touch-control state；Under dispaly state, the sense channel is controlled to be connected with the second voltage, and to
The touch-control display panel provides scanning signal and data-signal to drive the touch-control display panel to show；And in touch-control
Under state, the inductance capacitance of the touch-control display panel is detected by the sense channel.
Preferably, the driving method also includes：Carried respectively to the driver module and the touch control detection module
For the first control signal and the second control signal；Wherein, first control signal is used to control at the touch control display apparatus
In dispaly state；Second control signal is used to control the touch control display apparatus to be in touch-control state.
Preferably, the driving method also includes：Drive signal is provided to the touch control detection module；And show to described
Show that drive module provides drive signal.
Preferably, the refreshing frequency of the dispaly state is 60Hz, the refreshing frequency of the touch-control state for 60Hz~
120Hz。
Preferably, under touch-control state, pulse signal is applied at least one gate line and data wire.
Preferably, the pulse signal includes AC signal or unipolar signal.
Preferably, the AC signal includes sine wave signal or bipolar square wave signal.
Preferably, the unipolar signal includes unipolarity square-wave signal.
Touch control display apparatus and its driving method that the present invention is provided, OLED cathode electrode is connected with sense channel,
Sense channel is multiplexed under dispaly state and realizes display, makes touch-control and display module be integrated together to form touch-control display module,
Make touch control display apparatus more frivolous, at the same it is cost-effective, display and touch controllable function are realized by the way of timesharing drives.More enter
One step, under touch-control state, provide a pulse signal to gate drivers and source electrode driver and be applied to gate line and data
Line, with the parasitic capacitance between compensated cathode electrode and gate line, cathode electrode and data wire, improves the precision of touch control detection.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, simple be situated between will be made to the accompanying drawing of embodiment below
Continue, it should be apparent that, the accompanying drawing in description below only relates to some embodiments of the present invention, rather than limitation of the present invention.
Fig. 1 shows the structural representation of the touch control display apparatus provided according to a first embodiment of the present invention.
Fig. 2 shows the structural representation of the touch control display apparatus provided according to a second embodiment of the present invention.
Fig. 3 shows the equivalent circuit diagram of the touch-control display panel provided according to embodiments of the present invention.
Fig. 4 shows the circuit diagram of the touch control detection module provided according to embodiments of the present invention.
Fig. 5 a and Fig. 5 b respectively illustrate the electricity for the gate drivers that first embodiment of the invention and second embodiment are provided
Lu Tu.
Fig. 6 a and Fig. 6 b respectively illustrate the electricity for the source electrode driver that first embodiment of the invention and second embodiment are provided
Lu Tu.
Fig. 7 shows the equivalent circuit diagram of another touch-control display panel provided according to embodiments of the present invention；
Fig. 8 shows the signal timing diagram of the touch control display apparatus provided according to a first embodiment of the present invention；
Fig. 9 shows the signal timing diagram of the touch control display apparatus provided according to a second embodiment of the present invention；
Figure 10 shows the flow chart of the driving method of the touch control display apparatus provided according to a third embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing, clear, complete description is carried out to the technical scheme of the embodiment of the present invention.Obviously described embodiment is the present invention
A part of embodiment, rather than whole embodiment.Based on described embodiments of the invention, ordinary skill people
The every other embodiment that member is obtained on the premise of without creative work, belongs to the scope of protection of the invention.
Fig. 1 shows the structure chart of the touch control display apparatus provided according to a first embodiment of the present invention.Fig. 3 shows basis
The equivalent circuit diagram of touch-control display panel provided in an embodiment of the present invention.As shown in figure 1, the touch control display apparatus includes touch-control
Display panel 10, driver module 20, touch control detection module 30 and power module 40.
Wherein, the touch-control display panel 10 includes a plurality of gate lines G 1-Gm, a plurality of data lines S1-Sn, multiple pixel regions
The pixel cell 2 in domain 4, the Organic Light Emitting Diode OLED of multiple pixel regions 4 and is set corresponding to multiple pixel regions 4
Multiple cathode electrode (not shown)s, wherein, m, n are positive integer.Power module 40 and the touch-control display panel 10
Connection, for providing first voltage ELVDD and second voltage ELVSS to the touch-control display panel 10.Wherein, the pixel region
Domain 4 is connected to the gate lines G m, the data wire Sn, the first voltage ELVDD and the second voltage ELVSS.
In the present embodiment, as shown in figure 3, the pixel region 4 of the touch-control display panel 10 includes organic light-emitting diodes
Manage (OLED), and be connected to gate lines G m and data wire Sn to control OLED pixel cell 2.OLED anode is connected to picture
Plain unit 2, and OLED negative electrode is connected to ground power supply ELVSS.
This OLED is in response to the light for the electric current generation predetermined luminance supplied from pixel cell 2.Pixel cell 2 is in response to sweeping
Retouch and data wire Sn data-signal is supplied to when signal is supplied to gate lines G m and controls to be supplied to the amount of OLED electric current.For
This, pixel cell 2 includes being connected to second transistor T2 between first voltage ELVDD and OLED, is connected to second transistor
The first transistor T1 among T2, data wire Sn and gate lines G m, and it is connected to second transistor T2 gate electrode and first
Storage capacitance Cst between voltage ELVDD.
The first transistor T1 gate electrode is connected to gate lines G m, and the first transistor T1 first electrode is connected to number
According to line Sn.The first transistor T1 second electrode is connected to storage capacitance Cst first terminal.The first of the first transistor T1
Electrode can be one of source electrode and drain electrode, and second electrode is the other of source electrode and drain electrode.For example,
If first electrode is source electrode, second electrode is drain electrode.When supplying scanning signal from gate lines G m, grid is connected to
Line Gm and data wire Sn the first transistor T1 conductings, to supply the data-signal supplied from data wire Sn to storage capacitance Cst.
Storage capacitance Cst charge to data-signal relative to voltage.
Second transistor T2 gate electrode is connected to a storage capacitance Cst terminal, and second transistor T2's
The memory Cst of first electrode connection another terminal and first voltage ELVDD.Second transistor T2 second electrode is connected to
OLED anode.Second transistor T2 flows to ground in response to the value of the voltage stored in storage capacitance Cst, control via OLED
The amount of face power supply ELVSS electric current.In Fig. 3 pixel region 4, OLED is produced with the electricity supplied with second transistor T2
The light of the corresponding brightness of the amount of stream.
In the present embodiment, the first transistor T1 can be PMOS transistor, or nmos pass transistor.When the first crystalline substance
When body pipe T1 is PMOS transistor, when the first transistor T1 gate electrode voltage is low level, the first transistor T1 is on
State, when the first transistor T1 gate electrode voltage is high level, the first transistor T1 is off state.Work as the first transistor
When T1 is nmos pass transistor, when the first transistor T1 gate electrode voltage is high level, the first transistor T1 is in the conduction state,
When the first transistor T1 gate electrode voltage is low level, the first transistor T1 is off state.
Second transistor T2 can be PMOS transistor, or nmos pass transistor.When second transistor T2 is PMOS
During transistor, when second transistor T2 gate electrode voltage is low level, second transistor T2 is in the conduction state, the second crystal
When pipe T2 gate electrode voltage is high level, second transistor T2 is off state.When second transistor T2 is NMOS crystal
When Guan Shi, second transistor T2 gate electrode voltage are high level, second transistor T2 is in the conduction state, second transistor T2
Gate electrode voltage be low level when, second transistor T2 is off state.
Driver module 20 is used under dispaly state provide scanning signal and data to the touch-control display panel
Signal is to drive touch-control display panel to show.
In the present embodiment, the driver module 20 includes gate drivers 21 and source electrode driver 22.The grid
Driver 21 is used under dispaly state provide grid voltage to the touch-control display panel；The source electrode driver 22 is used for
Under dispaly state gray scale voltage is provided to the touch-control display panel.
In the present embodiment, as shown in Figure 5 a, the gate drivers 21 include drive element of the grid 211, the first electric capacity
C1 and the second electric capacity C2.Wherein, the drive element of the grid 211 is used to receive grid malleation and grid negative pressure, and is supplied to institute
State touch-control display panel；First electric capacity C1 and the second electric capacity C2 are connected in series in the grid malleation VGH and the grid negative pressure
Between VGL, wherein, the node between the first electric capacity C1 and the second electric capacity C2 is connected with earth terminal GND.
As shown in Figure 6 a, the source electrode driver 22 includes source drive unit 221, corresponding with display data for generating
Gray scale voltage.
Touch control detection module 30 is used to control the cathode electrode to be multiplexed with cathode electrode under touch-control state, and detects institute
State the inductance capacitance of touch-control display panel.
In the present embodiment, the touch control detection module includes touch control detection unit 31 and Multiplexing Unit 32.Wherein, it is described
Multiplexing Unit 32 is used to control the cathode electrode to be multiplexed with cathode electrode；The touch control detection unit 31 is used to detect described touch
Control the inductance capacitance Cs of display panel 10.
Under touch-control state, Cs is inductance capacitance between cathode electrode and ground, Cd be cathode electrode and data wire Sn it
Between parasitic capacitance, Cg is parasitic capacitance between cathode electrode and gate lines G m.
As shown in figure 4, the touch control detection unit 31 include amplifier A1, feedback capacity Cfb, feedback resistance Rfb and
Analog-digital converter ADC.Wherein, the amplifier A1 includes first input end, the second input and output end.For example, amplifier
A1 can be common difference amplifier, and its first input end can be negative input end, and the second input can be positive input terminal,
Vice versa.
In the present embodiment, amplifier A1 first input end is connected with drive signal VSTIM, the second input and multiplexing
Unit 32 is connected, and output end is connected with the analog-digital converter ADC.The feedback capacity Cfb and feedback resistance Rfb is in parallel
It is connected between the second input of the amplifier A1 and output end.
The Multiplexing Unit 32 includes first switch S1 and second switch S2.Wherein, the first switch S1 is connected to institute
State between amplifier A1 the second input and sense channel Rx；The second switch S2 is connected to the sense channel Rx and institute
State between second voltage ELVSS, wherein, the sense channel Rx is connected with the cathode electrode.
In the present embodiment, when the touch control display apparatus is in dispaly state, first switch S1 is off state,
Second switch S2 is in the conduction state；When the touch control display apparatus is in touch-control state, first switch S1 is on shape
State, second switch S2 is off state, is now multiplexed with cathode electrode with the sense channel Rx cathode electrodes being connected.
In a preferred embodiment, the touch control display apparatus also includes time schedule controller 50, for showing to described
Show that drive module 20 and the touch control detection module 30 provide the first control signal and the second control signal.Wherein, described first
Control signal is used to control the touch control display apparatus to be in dispaly state；Second control signal is used to control the touch-control
Display device is in touch-control state.That is, under the first control signal, first switch S1 is off at state, second switch S2
In conducting state；Under the second control signal, first switch S1 is in the conduction state, and second switch S2 is off state.
In a preferred embodiment, the touch control display apparatus also includes signal source 60, for being examined to the touch-control
Survey module 30 and drive signal VSTIM is provided.
Fig. 8 shows the signal timing diagram of the touch control display apparatus provided according to a first embodiment of the present invention.Such as Fig. 8 institutes
Show, under the first control signal, the touch control display apparatus is under dispaly state, and first switch S1 is off state, the
Two switch S2 are in the conduction state, and now, cathode electrode is connected to second voltage ELVSS by sense channel Rx.
Under the second control signal, the touch control display apparatus is under touch-control state, and first switch S1 is on shape
State, second switch S2 is off state, now, and cathode electrode is multiplexed with cathode electrode, the first input end input of amplifier
Drive signal VSTIM, the electric capacity of the cathode electrode over the ground, the i.e. inductance capacitance of touch-control display panel are detected by amplifier.
It is 60Hz in this example it is shown that the refreshing frequency of state is fixed, the refreshing frequency of touch-control state can be with
For 60Hz~120Hz.
The touch control display apparatus that first embodiment of the invention is provided, OLED cathode electrode is multiplexed with touch-control state
Cathode electrode, makes touch-control and display module be integrated together to form touch-control display module, makes touch control display apparatus more frivolous, together
When it is cost-effective, realized by the way of timesharing drives display and touch controllable function.
Further, in order to eliminate influence of the electric leakage to touch control detection, the precision of touch control detection is improved, the second crystalline substance need to be made
Body pipe T2 under touch-control state in complete switching off state, can by under touch-control state, controlling all gate lines to open,
That is the first transistor T1 is turned on, and data wire S1-Sn, which connects high level or low level, turns off second transistor T2, or anode is electric
Position ELVDD is reduced to realize with sense channel Rx level identical.Wherein, when second transistor T2 is PMOS transistor,
Data wire S1-Sn connects high level, and when second transistor T2 is nmos pass transistor, data wire S1-Sn connects low level.It can also lead to
Cross increase third transistor T3 and realize (as shown in Figure 7), wherein, the 3rd control signal TPS controls third transistor T3 in touch-control
Turn off, turned under dispaly state under state.
Fig. 7 shows the equivalent circuit diagram of another touch-control display panel provided according to embodiments of the present invention.Such as Fig. 7 institutes
Show, each pixel region 4 of touch-control display panel 10 include the first transistor T1, second transistor T2, third transistor T3 and
Storage capacitance Cst.The gate electrode of the first transistor T1 is connected with a gate line in the gate line, and described first is brilliant
Body pipe T1 first electrode is connected with the data line in the data wire, the second electrode of the first transistor T1 and institute
The gate electrode for stating second transistor T2 is connected；The gate electrode of the second transistor T2 and the first transistor T1 second electrode phase
Even, the first electrode of the second transistor T2 is connected with the second electrode of the third transistor T3, the second transistor
T2 second electrode is connected with the anode of the Organic Light Emitting Diode；The gate electrode of the third transistor T3 and the 3rd control
Signal TPS is connected, and the first electrode of the third transistor T3 is connected with the first voltage ELVDD, the third transistor
T3 second electrode is connected with the first electrode of the second transistor T2；Storage capacitance Cst is connected to the first transistor
Between T1 second electrode and earth terminal.
In the present embodiment, the first transistor T1 can be PMOS transistor, or nmos pass transistor.When the first crystalline substance
When body pipe T1 is PMOS transistor, when the first transistor T1 gate electrode voltage is low level, the first transistor T1 is on
State, when the first transistor T1 gate electrode voltage is high level, the first transistor T1 is off state.Work as the first transistor
When T1 is nmos pass transistor, when the first transistor T1 gate electrode voltage is high level, the first transistor T1 is in the conduction state,
When the first transistor T1 gate electrode voltage is low level, the first transistor T1 is off state.
Second transistor T2 can be PMOS transistor, or nmos pass transistor.When second transistor T2 is PMOS
During transistor, when second transistor T2 gate electrode voltage is low level, second transistor T2 is in the conduction state, the second crystal
When pipe T2 gate electrode voltage is high level, second transistor T2 is off state.When second transistor T2 is NMOS crystal
When Guan Shi, second transistor T2 gate electrode voltage are high level, second transistor T2 is in the conduction state, second transistor T2
Gate electrode voltage be low level when, second transistor T2 is off state.
Third transistor T3 can be PMOS transistor, or nmos pass transistor.When third transistor T3 is PMOS
During transistor, when third transistor T3 gate electrode voltage is low level, third transistor T3 is in the conduction state, the 3rd crystal
When pipe T3 gate electrode voltage is high level, third transistor T3 is off state.When third transistor T3 is NMOS crystal
When Guan Shi, third transistor T3 gate electrode voltage are high level, third transistor T3 is in the conduction state, third transistor T3
Gate electrode voltage be low level when, third transistor T3 is off state.
Under dispaly state, the T3 conductings of control third transistor；Under touch-control state, the T3 shut-offs of control third transistor,
Influence of the electric leakage to touch control detection can be eliminated, the precision of touch control detection is improved.
Fig. 2 shows the structural representation of the touch control display apparatus provided according to a second embodiment of the present invention.It is real with first
Apply example to compare, the gate drivers 21 and source electrode driver 22 of second embodiment of the invention add capacitance compensation function.Other
As first embodiment of the invention, it will not be repeated here.
As shown in Figure 5 b, gate drivers 21 include drive element of the grid 211, the first electric capacity C1, the second electric capacity C2, the 3rd
Switch the switches of S3 and the 4th S4.Wherein, the drive element of the grid 211 is used to receive grid malleation and grid negative pressure, and provides
To the touch-control display panel；First electric capacity C1 and the second electric capacity C2 are connected in series in the grid malleation VGH and the grid
Between negative pressure VGL, the 3rd switch S3 is connected to node and driving letter between first electric capacity and second electric capacity
Between number；4th switch S4 is connected between the node between first electric capacity and second electric capacity and earth terminal.
In the present embodiment, when the touch control display apparatus is in dispaly state, the 3rd switch S3 is off state,
4th switch S4 is in the conduction state；When the touch control display apparatus is in touch-control state, the 3rd switch S3 is on shape
State, the 4th switch S4 is off state.
As shown in Figure 6 b, the source electrode driver 22 also includes the 5th switch S5 and the 6th switch S6, the 5th switch S5 companies
It is connected between the drive signal VSTIM and the touch-control display panel 10；6th switch S6 is connected to the source electrode and driven
Between moving cell 221 and the touch-control display panel 10.
In the present embodiment, when the touch control display apparatus is in dispaly state, the 5th switch S5 is off state,
6th switch S6 is in the conduction state；When the touch control display apparatus is in touch-control state, the 5th switch S5 is on shape
State, the 6th switch S6 is off state.
In a preferred embodiment, the signal source 60 is additionally operable to provide driving letter to the driver module 20
Number VSTIM.
In a preferred embodiment, under touch-control state, apply pulse at least one gate line and data wire
Signal.
In the present embodiment, the pulse signal includes AC signal or unipolar signal.The AC signal is included just
String ripple signal or bipolar square wave signal.The unipolar signal includes unipolarity square-wave signal.
Fig. 9 shows the signal timing diagram of the touch control display apparatus provided according to a second embodiment of the present invention.Such as Fig. 9 institutes
Show, under the first control signal, the touch control display apparatus is under dispaly state, and first switch S1 is off state, the
Two switch S2 are in the conduction state, and now, cathode electrode is connected to second voltage ELVSS by sense channel Rx.
Under the second control signal, the touch control display apparatus is under touch-control state, and first switch S1 is on shape
State, second switch S2 is off state, now, and cathode electrode is multiplexed with cathode electrode, the first input end input of amplifier
Drive signal VSTIM, the electric capacity of the cathode electrode over the ground, the i.e. inductance capacitance of touch-control display panel are detected by amplifier.
It is 60Hz in this example it is shown that the refreshing frequency of state is fixed, the refreshing frequency of touch-control state can be with
For 60Hz~120Hz.Compared with first embodiment of the invention, second embodiment of the invention is under touch-control state, to raster data model
Device and source electrode driver provide a pulse signal and are applied to gate line and data wire, with compensated cathode electrode and gate line, negative electrode
Parasitic capacitance between electrode and data wire, improves the precision of touch control detection.
Further, touch-control is examined in order to eliminate the parasitic capacitance between cathode electrode and anode and gate line, data wire
The influence of survey, can be by the way of driving entirely.Under touch-control state, first voltage ELVDD, gate lines G 1-Gm and data wire
Same pulse signal, such as square wave, sine wave are driven on S1-Sn.
Further, in order to eliminate influence of the electric leakage to touch control detection, the precision of touch control detection is improved, the second crystalline substance need to be made
Body pipe T2 under touch-control state in complete switching off state, can by under touch-control state, controlling all gate lines to open,
That is the first transistor T1 is turned on, and data wire S1-Sn, which connects high level or low level, turns off second transistor T2, or anode is electric
Position ELVDD is reduced to realize with sense channel Rx level identical.Wherein, when second transistor T2 is PMOS transistor,
Data wire S1-Sn connects high level, and when second transistor T2 is nmos pass transistor, data wire S1-Sn connects low level.It can also lead to
Cross increase third transistor T3 and realize (as shown in Figure 7), wherein, the 3rd control signal TPS controls third transistor T3 in touch-control
Turn off, turned under dispaly state under state.
Fig. 7 shows the equivalent circuit diagram of another touch-control display panel provided according to embodiments of the present invention.Such as Fig. 7 institutes
Show, each pixel region 4 of touch-control display panel 10 include the first transistor T1, second transistor T2, third transistor T3 and
Storage capacitance Cst.The gate electrode of the first transistor T1 is connected with a gate line in the gate line, and described first is brilliant
Body pipe T1 first electrode is connected with the data line in the data wire, the second electrode of the first transistor T1 and institute
The gate electrode for stating second transistor T2 is connected；The gate electrode of the second transistor T2 and the first transistor T1 second electrode phase
Even, the first electrode of the second transistor T2 is connected with the second electrode of the third transistor T3, the second transistor
T2 second electrode is connected with the anode of the Organic Light Emitting Diode；The gate electrode of the third transistor T3 and the 3rd control
Signal TPS is connected, and the first electrode of the third transistor T3 is connected with the first voltage ELVDD, the third transistor
T3 second electrode is connected with the first electrode of the second transistor T2；Storage capacitance Cst is connected to the first transistor
Between T1 second electrode and earth terminal.
Under dispaly state, the T3 conductings of control third transistor；Under touch-control state, the T3 shut-offs of control third transistor,
Influence of the electric leakage to touch control detection can be eliminated, the precision of touch control detection is improved.
Figure 10 shows the flow chart of the driving method of the touch control display apparatus provided according to a third embodiment of the present invention.Such as
Shown in Figure 10, the driving method comprises the following steps.
In step S01, timesharing switching dispaly state and touch-control state；
In step S02, under dispaly state, the sense channel is controlled to be connected with the second voltage, and to described
Touch-control display panel provides scanning signal and data-signal to drive the touch-control display panel to show.
In step S03, under touch-control state, the induced electricity of the touch-control display panel is detected by the sense channel
Hold.
In the present embodiment, by providing the first control respectively to the driver module and the touch control detection module
Signal and the second control signal make touch control display apparatus be in dispaly state or touch-control state.Wherein, first control signal
For controlling the touch control display apparatus to be in dispaly state；Second control signal is used to control the touch control display apparatus
In touch-control state.
In the present embodiment, when the touch control display apparatus is under touch-control state, provided to the touch control detection module
Drive signal is to realize touch control detection.When the touch control display apparatus is under dispaly state, carried to the driver module
For drive signal to realize display.The refreshing frequency of the dispaly state is 60Hz, and the refreshing frequency of the touch-control state is
60Hz~120Hz.
When the touch control display apparatus is under touch-control state, apply pulse letter at least one gate line and data wire
Number, with the parasitic capacitance between compensated cathode electrode and gate line, cathode electrode and data wire.
In the present embodiment, the pulse signal includes AC signal or unipolar signal.The AC signal is included just
String ripple signal or bipolar square wave signal.The unipolar signal includes unipolarity square-wave signal.
The driving method for the touch control display apparatus that third embodiment of the invention is provided is logical with sensing by OLED cathode electrode
Road connect, under dispaly state be multiplexed sense channel realize display, make touch-control and display module be integrated together to be formed touch-control show
Show module, make touch control display apparatus more frivolous, at the same it is cost-effective, display and touch-control work(are realized by the way of timesharing drives
Energy.Further, under touch-control state, provide a pulse signal to gate drivers and source electrode driver and be applied to gate line
And data wire, with the parasitic capacitance between compensated cathode electrode and gate line, cathode electrode and data wire, improve touch control detection
Precision.
Described above is only the exemplary embodiment of the present invention, not for limiting the scope of the invention, this hair
Bright protection domain is determined by appended claim.
Claims (31)
1. a kind of touch control display apparatus, including：
Touch-control display panel, including a plurality of gate line, a plurality of data lines, the pixel cell of multiple pixel regions, multiple pixel regions
The Organic Light Emitting Diode in domain and the multiple cathode electrodes set corresponding to multiple pixel regions；
Power module, is connected with the touch-control display panel, for providing first voltage and second to the touch-control display panel
Voltage；
Wherein, the pixel region is connected to the gate line, the data wire, the first voltage and the second voltage；
The multiple cathode electrode is connected with multiple sense channels；
Driver module, for controlling the sense channel to be connected with the second voltage under dispaly state, and to described
Touch-control display panel provides scanning signal and data-signal to drive touch-control display panel to show；
Touch control detection module, the induced electricity for detecting the touch-control display panel by the sense channel under touch-control state
Hold,
The touch control display apparatus timesharing switches the dispaly state and the touch-control state.
2. touch control display apparatus according to claim 1, wherein, each pixel cell includes the first transistor, the second crystalline substance
Body pipe and storage capacitance, wherein,
The gate electrode of the first transistor is connected with a gate line in the gate line, and the first of the first transistor
Electrode is connected with the data line in the data wire, the second electrode of the first transistor and the second transistor
Gate electrode is connected；
The gate electrode of the second transistor is connected with the second electrode of the first transistor, and the first of the second transistor
Electrode is connected with the first voltage, the second electrode of the second transistor and the anode phase of the Organic Light Emitting Diode
Even；
The storage capacitance is connected between the second electrode of the first transistor and the first voltage.
3. touch control display apparatus according to claim 2, wherein, the driver module includes：
Gate drivers, for providing grid voltage to the touch-control display panel under dispaly state；
Source electrode driver, for providing gray scale voltage to the touch-control display panel under dispaly state.
4. touch control display apparatus according to claim 2, wherein, the touch control detection module includes：
Multiplexing Unit, for controlling the sense channel to be connected under dispaly state with the second voltage；
Touch control detection unit, the induced electricity for detecting the touch-control display panel by the sense channel under touch-control state
Hold.
5. touch control display apparatus according to claim 4, wherein, the touch control detection unit includes amplifier, feedback electricity
Appearance, feedback resistance and analog-digital converter,
Wherein, the amplifier includes first input end, the second input and output end, and first input end connects with drive signal
Connect, the second input is connected with Multiplexing Unit, output end is connected with the analog-digital converter；
The feedback capacity and the feedback resistance are connected in parallel between the second input of the amplifier and output end.
6. touch control display apparatus according to claim 5, wherein, the first input end is negative input end, described second
Input is positive input terminal.
7. touch control display apparatus according to claim 5, wherein, the first input end is positive input terminal, described second
Input is negative input end.
8. touch control display apparatus according to claim 5, wherein, the Multiplexing Unit is opened including first switch and second
Close,
Wherein, the first switch is connected between the second input of the amplifier and sense channel；
The second switch is connected between the sense channel and the second voltage.
9. touch control display apparatus according to claim 8, wherein, when the touch control display apparatus is in dispaly state,
First switch is off state, and second switch is in the conduction state；
When the touch control display apparatus is in touch-control state, first switch is in the conduction state, and second switch is off shape
State.
10. touch control display apparatus according to claim 8, wherein, the gate drivers include：
Drive element of the grid, for receiving grid malleation and grid negative pressure, and is supplied to the touch-control display panel；
First electric capacity and the second electric capacity, are connected in series between the grid malleation and the grid negative pressure,
Wherein, the node between first electric capacity and second electric capacity is connected with earth terminal.
11. touch control display apparatus according to claim 8, wherein, the gate drivers include：
Drive element of the grid, for receiving grid malleation and grid negative pressure, and is supplied to the touch-control display panel；
First electric capacity and the second electric capacity, are connected in series between the grid malleation and the grid negative pressure,
3rd switch, between the node and the drive signal that are connected between first electric capacity and second electric capacity；
4th switch, between the node and earth terminal that are connected between first electric capacity and second electric capacity.
12. touch control display apparatus according to claim 11, wherein, when the touch control display apparatus is in dispaly state
When, the 3rd switch is off state, and the 4th switch is in the conduction state；
When the touch control display apparatus is in touch-control state, the 3rd switch is in the conduction state, and the 4th switch is off shape
State.
13. touch control display apparatus according to claim 8, wherein, the source electrode driver includes：
Source drive unit, for generating gray scale voltage corresponding with display data.
14. touch control display apparatus according to claim 10, wherein, the source electrode driver also includes：
5th switch, is connected between the drive signal and the touch-control display panel；
6th switch, is connected between the source drive unit and the touch-control display panel.
15. touch control display apparatus according to claim 14, wherein, when the touch control display apparatus is in dispaly state
When, the 5th switch is off state, and the 6th switch is in the conduction state；
When the touch control display apparatus is in touch-control state, the 5th switch is in the conduction state, and the 6th switch is off shape
State.
16. touch control display apparatus according to claim 1, wherein, in addition to：
Time schedule controller, for the driver module and the touch control detection module provide respectively the first control signal and
Second control signal, wherein, first control signal is used to control the touch control display apparatus to be in dispaly state；Described
Two control signals are used to control the touch control display apparatus to be in touch-control state.
17. touch control display apparatus according to claim 2, wherein, in addition to：
Signal source, for providing drive signal to the touch control detection module.
18. touch control display apparatus according to claim 17, wherein, the signal source is additionally operable to drive mould to the display
Block provides drive signal.
19. touch control display apparatus according to claim 1, wherein, each pixel cell includes the first transistor, the second crystalline substance
Body pipe, third transistor and storage capacitance, wherein,
The gate electrode of the first transistor is connected with a gate line in the gate line, and the first of the first transistor
Electrode is connected with the data line in the data wire, the second electrode of the first transistor and the second transistor
Gate electrode is connected；
The gate electrode of the second transistor is connected with the second electrode of the first transistor, the first electrode of the second transistor
It is connected with the second electrode of the third transistor, the second electrode of the second transistor and the Organic Light Emitting Diode
Anode is connected；
The gate electrode of the third transistor is connected with the 3rd control signal, the first electrode of the third transistor and described the
One voltage is connected, and the second electrode of the third transistor is connected with the first electrode of the second transistor；
Storage capacitance is connected between the second electrode of the first transistor and earth terminal.
20. touch control display apparatus according to claim 1, wherein, under touch-control state, in gate line and data wire at least
One of upper apply pulse signal.
21. touch control display apparatus according to claim 20, wherein, the pulse signal includes AC signal or unipolarity
Signal.
22. touch control display apparatus according to claim 21, wherein, the AC signal includes sine wave signal or bipolar
Property square-wave signal.
23. touch control display apparatus according to claim 21, wherein, the unipolar signal is believed including unipolarity square wave
Number.
24. a kind of driving method of touch control display apparatus as described in claim any one of 1-23, including：
Timesharing switches dispaly state and touch-control state；
Under dispaly state, control the sense channel to be connected with the second voltage, and provided to the touch-control display panel
Scanning signal and data-signal are to drive the touch-control display panel to show；And
Under touch-control state, the inductance capacitance of the touch-control display panel is detected by the sense channel.
25. driving method according to claim 24, wherein, in addition to：
The first control signal and the second control signal are provided respectively to the driver module and the touch control detection module；Its
In, first control signal is used to control the touch control display apparatus to be in dispaly state；Second control signal is used for
The touch control display apparatus is controlled to be in touch-control state.
26. driving method according to claim 25, wherein, in addition to：
Drive signal is provided to the touch control detection module；And
Drive signal is provided to the driver module.
27. driving method according to claim 24, wherein, the refreshing frequency of the dispaly state is 60Hz, described to touch
The refreshing frequency of control state is 60Hz~120Hz.
28. driving method according to claim 24, wherein, under touch-control state, gate line and data wire at least it
Apply pulse signal on one.
29. driving method according to claim 28, wherein, the pulse signal includes AC signal or unipolarity is believed
Number.
30. driving method according to claim 29, wherein, the AC signal includes sine wave signal or bipolarity side
Ripple signal.
31. driving method according to claim 29, wherein, the unipolar signal includes unipolarity square-wave signal.
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