CN105159519B - A kind of touch screen, its driving method and display device - Google Patents
A kind of touch screen, its driving method and display device Download PDFInfo
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- CN105159519B CN105159519B CN201510627505.5A CN201510627505A CN105159519B CN 105159519 B CN105159519 B CN 105159519B CN 201510627505 A CN201510627505 A CN 201510627505A CN 105159519 B CN105159519 B CN 105159519B
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Abstract
The invention discloses a kind of touch screen, its driving method and display devices, by increasing level shifting circuit between drive signal line and touch driving electrodes, and then drive signal line only needs to provide logic pulse signal, without realizing driving function, so that drive signal line can do thinner, it is advantageously implemented narrow frame design；Meanwhile more drive signal lines can be done under identical dimensional conditions, to enhance touch-control sensitivity, power supply signal cabling need to only be done more slightly wider to reduce impedance；And since driving signal is that timesharing successively drives, therefore the load of power signal line is identical with the load of single drive signal line of original design, it not will increase power consumption, driving line is replaced by a power signal line, the impedance of power signal line need to only be reduced, it can be effectively improved that driving signal line impedence in original design is excessive and the big problem of resistance difference, be conducive to improve touch function.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of touch screens, its driving method and display device.
Background technique
With the development of touch screen technology, touch technology is rapidly developed, and one chip touch screen mainly uses electricity at present
Appearance formula principle of induction.Usual capacitive touch screen includes self-tolerant touch screen and mutual capacitance type touch screen again, and wherein mutual capacitance type touches
Screen can be realized multiple spot identification and become mainstream.
The structure of mutual capacitance type single-sheet touch screen is as shown in Figure 1, there is touch screen interlaced touch to drive in the prior art
Moving electrode 01 and touch sensible electrode 02, form coupled capacitor between two kinds of electrodes, and drive signal line TX sends driving signal, sense
Induction signal line RX receives inductive signal, when finger touches a certain position on touch screen, due to there is electricity between finger and electrode
Hold, the inductive signal that inductive signal line RX is received can change, can position finger touch position with this, that is, touching be determined
Control the position occurred.Touch-control driving scanning for progressive scan, wherein drive signal line TX input driving signal be timesharing successively
The pulse signal of transmission, for middle large scale one chip touch screen, the cabling of drive signal line TX is longer, and different driving signal
Cause resistance difference larger since track lengths are different between signal on line TX, signal wire is longer, and impedance is larger, most
Lead to be input to each driving signal for touching driving electrodes eventually with larger difference, and in order to realize preferable touch effect, mesh
The voltage magnitude of signal on preceding drive signal line TX is all bigger, such as the driving signal of 21.5 inches of one chip touch screen
Amplitude reach 30V or more, not only increased the workload of touch chip in this way, but also need to increase boosting in the periphery of touch chip
Chip increases cost of manufacture so that its peripheral circuit becomes more complicated.
Therefore, how to reduce the difference for being input to each driving signal for touching driving electrodes, improve touch-control effect, be ability
Field technique personnel technical problem urgently to be resolved.
Summary of the invention
The embodiment of the invention provides a kind of touch screen, its driving method and display devices, to solve in the prior art
It is existing to be input to each the problem of differing greatly, influence touch-control effect of driving signal for touching driving electrodes.
The embodiment of the invention provides a kind of touch screens, comprising: and a plurality of touch driving electrodes along first direction setting are more
The touch sensible electrode and a plurality of and touch sensible electrode for the second direction setting that item edge intersects with first direction are one by one
Corresponding inductive signal line；Wherein, the inductive signal line is for exporting the touching signals that the touch sensible electrode senses；
Further include: the multiple and one-to-one level shifting circuit of the touch driving electrodes, for turning to the level
Change the power signal line of circuit input power signal and a plurality of with the one-to-one driving signal of the level shifting circuit
Line；Wherein,
The drive signal line is used for the level shifting circuit input logic pulse signal；
What the level shifting circuit was used to input the power signal line under the control of the logic pulse signal
Power supply signal is input to the corresponding touch driving electrodes.
In a kind of possible embodiment, in above-mentioned touch screen provided in an embodiment of the present invention, the level conversion electricity
Road specifically includes: first switch transistor, second switch transistor, third switching transistor and the 4th switching transistor；Its
In,
The grid of the first switch transistor is connected with the drive signal line, and source electrode is connected with ground level signal end,
Drain electrode is connected with the grid of the drain electrode of the third switching transistor and the 4th switching transistor respectively；
The signal of the grid input of the second switch transistor and the logic pulse signal of drive signal line input
Polarity on the contrary, source electrode is connected with the ground level signal end, drain electrode respectively with the grid of the third switching transistor, described the
The drain electrode of four switching transistors is connected with signal output end；The signal output end is used for the corresponding touch driving electrodes
Input drive signal；
The source electrode of the third switching transistor is connected with the power signal line；
The source electrode of 4th switching transistor is connected with the power signal line.
In a kind of possible embodiment, in above-mentioned touch screen provided in an embodiment of the present invention, the level conversion electricity
Road, further includes: phase inverter；
The input terminal of the phase inverter is connected with the drive signal line, the grid of output end and the second switch transistor
Extremely it is connected；
The logic pulse signal that the phase inverter is used to input the drive signal line carries out polarity reversion, and by polarity
Signal after reversion is input to the grid of the second switch transistor.
In a kind of possible embodiment, in above-mentioned touch screen provided in an embodiment of the present invention, the first switch is brilliant
Body pipe, second switch transistor, third switching transistor and the 4th switching transistor synchronize be made in the glass of the touch screen
On substrate.
In a kind of possible embodiment, in above-mentioned touch screen provided in an embodiment of the present invention, the touch driving electricity
The level shifting circuit is respectively set in the both ends of pole.
In a kind of possible embodiment, in above-mentioned touch screen provided in an embodiment of the present invention, further includes: touch-control core
Piece；
The touch chip is used for the drive signal line input logic pulse signal, and receives the inductive signal line
The touching signals of output.
The embodiment of the invention provides a kind of display devices, including above-mentioned touch screen provided in an embodiment of the present invention.
The embodiment of the invention provides a kind of driving methods of above-mentioned touch screen provided in an embodiment of the present invention, comprising:
By the drive signal line to the level shifting circuit input logic pulse signal；
When the logic pulse signal is high level signal, the level shifting circuit out-put supply signal to corresponding institute
Touch driving electrodes are stated, when the logic pulse signal is low level signal, the level shifting circuit output ground level signal
To the corresponding touch driving electrodes；
The touch sensible electrode couple it is described touch driving electrodes voltage signal and by the inductive signal line it is defeated
Out.
The beneficial effect of the embodiment of the present invention includes:
The embodiment of the invention provides a kind of touch screen, its driving method and display device, which includes: a plurality of edge
The touch driving electrodes of first direction setting, the touch sensible electrode for the second direction setting that a plurality of edge intersects with first direction,
And a plurality of and one-to-one inductive signal line of touch sensible electrode；Wherein, inductive signal line is for exporting touch sensible electricity
The touching signals that pole senses；The touch screen further include: the multiple and touch one-to-one level shifting circuit of driving electrodes is used
It a plurality of is driven in the power signal line to level shifting circuit input power signal and correspondingly with level shifting circuit
Signal wire；Wherein, drive signal line is used for level shifting circuit input logic pulse signal；Level shifting circuit is for patrolling
It collects the power supply signal under the control of pulse signal by power signal line input and is input to corresponding touch driving electrodes.
Specifically, touch screen provided in an embodiment of the present invention between drive signal line and touch driving electrodes by increasing
Level shifting circuit, and then drive signal line only needs to provide logic pulse signal, without realizing driving function, so that driving
Signal wire can be done thinner, be advantageously implemented narrow frame design；Meanwhile more driving letters can be made under identical dimensional conditions
Number line need to only do power supply signal cabling more slightly wider to reduce impedance to enhance touch-control sensitivity；And since driving is believed
Number it is that timesharing successively drives, therefore the load of power signal line is identical with the load of single drive signal line of original design, and
It not will increase power consumption, driving line is replaced by a power signal line, need to only reduce the impedance of power signal line, so that it may be effectively improved
Driving signal line impedence is excessive in original design and the big problem of resistance difference, is conducive to improve touch function.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of touch screen in the prior art；
Fig. 2 is the structural schematic diagram of touch screen provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of level shifting circuit provided in an embodiment of the present invention；
Fig. 4 is the driving method flow chart of touch screen provided in an embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawing, to the specific reality of touch screen provided in an embodiment of the present invention, its driving method and display device
The mode of applying is described in detail.
The embodiment of the invention provides a kind of touch screens, as shown in Fig. 2, may include: a plurality of to be arranged along first direction
Touch driving electrodes 1, the touch sensible electrode 2 for the second direction setting that a plurality of edge intersects with first direction and a plurality of and touching
Touch the one-to-one inductive signal line 3 of induction electrode 2；Wherein, inductive signal line 3 is sensed for exporting touch sensible electrode 2
Touching signals；
It can also include: multiple and the touch one-to-one level shifting circuit 4 of driving electrodes 1, be used for level conversion
The power signal line 5 of 4 input power signal Vcc of circuit and a plurality of and one-to-one drive signal line of level shifting circuit 4
6；Wherein,
Drive signal line 6 is used for 4 input logic pulse signal of level shifting circuit；
The power supply signal that level shifting circuit 4 is used to input power signal line 5 under the control of logic pulse signal is defeated
Enter to corresponding touch driving electrodes 1.
Above-mentioned touch screen provided in an embodiment of the present invention, by increasing electricity between drive signal line and touch driving electrodes
Flat conversion circuit, and then drive signal line only needs to provide logic pulse signal, without realizing driving function, so that driving letter
Number line can be done thinner, be advantageously implemented narrow frame design；Meanwhile more driving signals can be done under identical dimensional conditions
Line, to enhance touch-control sensitivity, so that need to only be done power supply signal cabling is more slightly wider to reduce impedance；And due to driving
Signal is that timesharing successively drives, therefore the load of power signal line is identical with the load of single drive signal line of original design,
It not will increase power consumption, driving line is replaced by a power signal line, need to only reduce the impedance of power signal line, so that it may effectively change
It is apt to that driving signal line impedence in original design is excessive and the big problem of resistance difference, is conducive to improve touch function.
In the specific implementation, in above-mentioned touch screen provided in an embodiment of the present invention, as shown in figure 3, level shifting circuit, it can
To specifically include: first switch transistor T1, second switch transistor T2, third switching transistor T3 and the 4th switching transistor
T4；Wherein, the grid of first switch transistor T1 is connected with drive signal line 6, and source electrode is connected with ground level signal end GND, leakage
Pole is connected with the grid of the drain electrode of third switching transistor T3 and the 4th switching transistor T4 respectively；Second switch transistor T2's
The logic pulse signal polarity that the signal of grid input is inputted with drive signal line 6 is on the contrary, source electrode and ground level signal end GND phase
Even, drain the drain electrode and signal output end Vout phase with the grid, the 4th switching transistor T4 of third switching transistor T3 respectively
Even；Signal output end Vout is used for corresponding 1 input drive signal of touch driving electrodes；The source electrode of third switching transistor T3
It is connected with power signal line 5；The source electrode of 4th switching transistor T4 is connected with power signal line 5.
Specifically, in above-mentioned touch screen provided in an embodiment of the present invention, when the logic pulse signal that drive signal line 6 inputs
When for high level signal, then first switch transistor T1 is connected, and then the grid of the 4th switching transistor T4 and ground level are believed
Number end GND conducting, therefore the 4th switching transistor T4 is connected, the 4th switching transistor T4 of conducting inputs power signal line 5
Power supply signal Vcc be output to signal output end Vout, therefore, what signal output end Vout can input power signal line 5
Power driving signal is input to corresponding touch driving electrodes, realizes and touches driving scanning；At the same time, second switch transistor
Logic pulse signal polarity that the signal and drive signal line 6 of the grid input of T2 input is on the contrary, i.e. second switch crystal at this time
The grid input low level signal of pipe T2, so that second switch transistor T2 ends, and then third switching transistor T3 is also at
Off state.
When the logic pulse signal that drive signal line 6 inputs is low level signal, then first switch transistor T1 ends,
And then the 4th switching transistor T4 is also at off state；At the same time, the signal of the grid input of second switch transistor T2
The logic pulse signal polarity inputted with drive signal line 6 is on the contrary, i.e. the grid input of second switch transistor T2 is high electric at this time
Ordinary mail number, so that second switch transistor T2 is connected, the second switch transistor T2 of conducting is by the grid of third switching transistor T3
Pole is connected with ground level signal end GND, therefore third switching transistor T3 is connected, and the third switching transistor T3 of conducting is by power supply
The power supply signal Vcc that signal wire 5 inputs is output to the grid of the 4th switching transistor T4, the 4th switching transistor T4 cut-off；It leads
Also ground level signal end GND is connected with signal output end Vout by logical second switch transistor T2, and therefore, signal exports at this time
Vout is held to export low level signal；In summary, when 6 input high level signal of drive signal line, then signal output end Vout is defeated
Power driving signal Vcc is to corresponding touch driving electrodes out, and when 6 input low level signal of drive signal line, then signal exports
End Vout also exports low level signal to corresponding touch driving electrodes.
In the specific implementation, in above-mentioned touch screen provided in an embodiment of the present invention, level shifting circuit can also include:
Phase inverter；The input terminal of phase inverter is connected with drive signal line, and output end is connected with the grid of second switch transistor；Phase inverter
Logic pulse signal for inputting drive signal line carries out polarity reversion, and the signal after polarity is inverted is input to second
The grid of switching transistor.Specifically, in above-mentioned touch screen provided in an embodiment of the present invention, drive signal line input high level letter
Number when, then level shifting circuit by signal output end out-put supply driving signal arrive corresponding touch driving electrodes, driving believe
When number line input low level signal, then level shifting circuit exports low level signal by signal output end and drives to corresponding touch
Moving electrode.In order to realize the above functions, the grid and second switch transistor of the first switch transistor in level shifting circuit
Grid need to input opposite polarity signal, i.e. the grid input high level signal of first switch transistor in the same period
When, when the grid input low level signal of second switch transistor, due to the grid and drive signal line of first switch transistor
It is connected, it is therefore desirable to be input to second switch transistor after the logic pulse signal of drive signal line input is carried out polarity reversion
Grid.Specifically, the reversion of signal can be realized using phase inverter, the signal after polarity is inverted is input to second switch
The grid of transistor guarantees that level shifting circuit inputs corresponding signal to driving electrodes are touched in the corresponding period, realizes touching
Touch the normal driving scanning of screen, naturally it is also possible to which the component that can be realized signal reverse function using other is not limited thereto.
In the specific implementation, in above-mentioned touch screen provided in an embodiment of the present invention, first switch transistor, second switch are brilliant
Body pipe, third switching transistor and the 4th switching transistor can synchronize be made on the glass substrate of touch screen.Specifically, originally
In the above-mentioned touch screen that inventive embodiments provide, the switching transistor that level shifting circuit includes can be in touch screen manufacturing process
It synchronizes and is made on glass substrate, do not need to increase additional manufacture craft, be conducive to add electricity in touch screen manufacturing process
The production of flat conversion circuit.
In the specific implementation, in above-mentioned touch screen provided in an embodiment of the present invention, the both ends for touching driving electrodes are set respectively
Set a level shifting circuit.It specifically, can unilateral setting and touch drive in above-mentioned touch screen provided in an embodiment of the present invention
The one-to-one level shifting circuit of moving electrode, can also bilateral setting and the one-to-one level conversion electricity of touch driving electrodes
Road, therefore above-mentioned level shifting circuit can be applied to unilateral or bilateral two kinds of touch-control drive modes, be conducive to improve touch screen
Broad applicability.
It in the specific implementation, can also include: touch chip in above-mentioned touch screen provided in an embodiment of the present invention；Touch-control
Chip is used for drive signal line input logic pulse signal, and receives the touching signals of inductive signal line output.Specifically, originally
In the above-mentioned touch screen that inventive embodiments provide, touch chip can with timesharing to drive signal line input logic pulse signal, into
And corresponding driving signal is exported to driving electrodes are touched by level shifting circuit, realize touch-control driving scanning line by line, and also
It can receive the touching signals of inductive signal line output, so that it is determined that the position that touch-control occurs, realizes the touch function of touch screen.
Based on the same inventive concept, the embodiment of the invention provides a kind of display devices, including the embodiment of the present invention to provide
Above-mentioned touch screen.The display device can be with are as follows: mobile phone, tablet computer, television set, display, laptop, digital phase
Any products or components having a display function such as frame, navigator.The principle and touch screen solved the problems, such as due to the display device
It is similar, therefore the implementation of the display device may refer to the implementation of above-mentioned touch screen, overlaps will not be repeated.
Based on the same inventive concept, the embodiment of the invention provides a kind of above-mentioned touch screens provided in an embodiment of the present invention
Driving method, as shown in figure 4, can with specifically includes the following steps:
S101, pass through drive signal line to level shifting circuit input logic pulse signal；
When S102, logic pulse signal are high level signal, level shifting circuit out-put supply signal to corresponding touch
Driving electrodes, when logic pulse signal is low level signal, level shifting circuit output ground level signal is driven to corresponding touch
Moving electrode；
S103, touch sensible electrode coupled touch driving electrodes voltage signal and exported by inductive signal line.
Specifically, it in the driving method of above-mentioned touch screen provided in an embodiment of the present invention, is patrolled by drive signal line input
Pulse signal is collected, and then corresponding driving signal is exported to touch driving electrodes by level shifting circuit, and touch sensible is electric
The voltage signal of pole coupled touch driving electrodes is simultaneously exported by inductive signal line, can finally determine the position that touch-control occurs,
To realize the touch function of touch screen.Wherein by increasing level conversion electricity between drive signal line and touch driving electrodes
Road, and then drive signal line only needs to provide logic pulse signal, without realizing driving function, so that drive signal line can be with
That does is thinner, is more conducive to realizing narrow frame design；Meanwhile more drive signal lines can be done under identical dimensional conditions,
To enhance touch-control sensitivity, power supply signal cabling need to only be done more slightly wider to reduce impedance；Simultaneously because driving signal is
Timesharing successively drives, therefore the load of power signal line is identical with the load of single drive signal line of original design, can't
Increase power consumption, driving line is replaced by a power signal line, need to only reduce the impedance of power signal line, so that it may be effectively improved original
Driving signal line impedence is excessive in design and the big problem of resistance difference, is conducive to improve touch function.
The embodiment of the invention provides a kind of touch screen, its driving method and display device, which includes: a plurality of edge
The touch driving electrodes of first direction setting, the touch sensible electrode for the second direction setting that a plurality of edge intersects with first direction,
And a plurality of and one-to-one inductive signal line of touch sensible electrode；Wherein, inductive signal line is for exporting touch sensible electricity
The touching signals that pole senses；The touch screen further include: the multiple and touch one-to-one level shifting circuit of driving electrodes is used
It a plurality of is driven in the power signal line to level shifting circuit input power signal and correspondingly with level shifting circuit
Signal wire；Wherein, drive signal line is used for level shifting circuit input logic pulse signal；Level shifting circuit is for patrolling
It collects the power supply signal under the control of pulse signal by power signal line input and is input to corresponding touch driving electrodes.
Specifically, touch screen provided in an embodiment of the present invention between drive signal line and touch driving electrodes by increasing
Level shifting circuit, and then drive signal line only needs to provide logic pulse signal, without realizing driving function, so that driving
Signal wire can be done thinner, be advantageously implemented narrow frame design；Meanwhile more driving letters can be made under identical dimensional conditions
Number line, to enhance touch-control sensitivity, so that need to only be done power supply signal cabling is more slightly wider to reduce impedance；And due to driving
Dynamic signal is that timesharing successively drives, therefore the load phase of the single drive signal line of load and the original design of power signal line
Together, it not will increase power consumption, driving line is replaced by a power signal line, need to only reduce the impedance of power signal line, so that it may have
Effect improves that driving signal line impedence in original design is excessive and the big problem of resistance difference, is conducive to improve touch function.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (7)
1. a kind of touch screen, comprising: a plurality of touch driving electrodes along first direction setting, what a plurality of edge intersected with first direction
The touch sensible electrode and a plurality of and one-to-one inductive signal line of the touch sensible electrode of second direction setting；Its
In, the inductive signal line is for exporting the touching signals that the touch sensible electrode senses；
It is characterized by further comprising: the multiple and one-to-one level shifting circuit of the touch driving electrodes, is used for described
It the power signal line of level shifting circuit input power signal and a plurality of is driven correspondingly with the level shifting circuit
Signal wire；Wherein,
The drive signal line is used for the level shifting circuit input logic pulse signal；
The level shifting circuit is used for the power supply for inputting the power signal line under the control of the logic pulse signal
Signal is input to the corresponding touch driving electrodes；
The touch screen further include: touch chip；The touch chip is used to believe to the drive signal line input logic pulse
Number, and receive the touching signals of the inductive signal line output.
2. touch screen as described in claim 1, which is characterized in that the level shifting circuit specifically includes: first switch is brilliant
Body pipe, second switch transistor, third switching transistor and the 4th switching transistor；Wherein,
The grid of the first switch transistor is connected with the drive signal line, and source electrode is connected with ground level signal end, drain electrode
It is connected respectively with the grid of the drain electrode of the third switching transistor and the 4th switching transistor；
The signal of the grid input of the second switch transistor and the logic pulse signal polarity of drive signal line input
On the contrary, source electrode is connected with the ground level signal end, drain electrode is opened with the grid of the third switching transistor, the described 4th respectively
The drain electrode for closing transistor is connected with signal output end；The signal output end is used to input to the corresponding touch driving electrodes
Driving signal；
The source electrode of the third switching transistor is connected with the power signal line；
The source electrode of 4th switching transistor is connected with the power signal line.
3. touch screen as claimed in claim 2, which is characterized in that the level shifting circuit, further includes: phase inverter；
The input terminal of the phase inverter is connected with the drive signal line, the grid phase of output end and the second switch transistor
Even；
The logic pulse signal that the phase inverter is used to input the drive signal line carries out polarity reversion, and polarity is inverted
Signal afterwards is input to the grid of the second switch transistor.
4. touch screen as claimed in claim 3, which is characterized in that the first switch transistor, second switch transistor,
Three switching transistors and the 4th switching transistor synchronize be made on the glass substrate of the touch screen.
5. touch screen according to any one of claims 1-4, which is characterized in that the both ends for touching driving electrodes are set respectively
Set the level shifting circuit.
6. a kind of display device, which is characterized in that including touch screen as described in any one in claim 1-5.
7. a kind of driving method of touch screen as described in any one in claim 1-5 characterized by comprising
By the drive signal line to the level shifting circuit input logic pulse signal；
When the logic pulse signal is high level signal, the level shifting circuit out-put supply signal to the corresponding touching
Touch driving electrodes, when the logic pulse signal is low level signal, the level shifting circuit output ground level signal to pair
The touch driving electrodes answered；
The touch sensible electrode couples the voltage signal for touching driving electrodes and is exported by the inductive signal line.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101686047A (en) * | 2008-09-24 | 2010-03-31 | 奕力科技股份有限公司 | Level switching circuit |
| CN203894514U (en) * | 2014-04-14 | 2014-10-22 | 京东方科技集团股份有限公司 | Display panel and display device |
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| JP5215534B2 (en) * | 2006-05-19 | 2013-06-19 | 株式会社ジャパンディスプレイイースト | Image display device |
| CN101190602B (en) * | 2006-11-22 | 2010-07-07 | 研能科技股份有限公司 | Ink-jet controlling circuit suitable for heating chip and its driving voltage controlling circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101686047A (en) * | 2008-09-24 | 2010-03-31 | 奕力科技股份有限公司 | Level switching circuit |
| CN203894514U (en) * | 2014-04-14 | 2014-10-22 | 京东方科技集团股份有限公司 | Display panel and display device |
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