CN105159519A - Touch screen, driving method for touch screen and display apparatus - Google Patents
Touch screen, driving method for touch screen and display apparatus Download PDFInfo
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- CN105159519A CN105159519A CN201510627505.5A CN201510627505A CN105159519A CN 105159519 A CN105159519 A CN 105159519A CN 201510627505 A CN201510627505 A CN 201510627505A CN 105159519 A CN105159519 A CN 105159519A
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Abstract
The invention discloses a touch screen, a driving method for the touch screen and a display apparatus. A level switching circuit is added between a driving signal line and a touch driving electrode, so that the driving signal line only needs to provide a logic pulse signal, a driving function does not need to be realized, the driving signal line can be made thinner, and narrow bezel design is facilitated; at the same time, more driving signal lines can be made under the same size, so that the touch sensitivity is improved and a power signal line only needs to be made relatively wide for reducing impedance; moreover, driving signals perform time-sharing driving in sequence, so that a load of the power signal line is the same as that of a single driving signal line in original design and the power consumption is not increased; and a driving line is replaced with one power signal line, so that the problems of overlarge impedance and large impedance difference of the driving signal line in the original design can be effectively improved by only reducing the impedance of the power signal line, and a touch function can be improved.
Description
Technical field
The present invention relates to display technique field, particularly relate to a kind of touch-screen, its driving method and display device.
Background technology
Along with the development of touch screen technology, touch technology is developed rapidly, and current one chip touch-screen mainly adopts capacitive induction principle.Usual capacitive touch screen comprises again self-tolerant touch-screen and mutual tolerance formula touch-screen, and wherein mutual tolerance formula touch-screen can realize multiple spot identification and become main flow.
In prior art, the structure of mutual tolerance formula single-sheet touch screen as shown in Figure 1, touch-screen has interlaced touch drive electrode 01 and touch sensible electrode 02, coupling capacitance is formed between two kinds of electrodes, drive signal line TX sends drive singal, induced signal line RX receives induced signal, when on finger touch to touch-screen during a certain position, owing to there is electric capacity between finger and electrode, the induced signal that induced signal line RX receives can change, finger touch position can be located with this, namely determine the position that touch-control occurs.Touch-control drives scanning for lining by line scan, the drive singal that wherein drive signal line TX inputs is the pulse signal that timesharing sends successively, for middle large scale one chip touch-screen, the cabling of drive signal line TX is longer, and cause resistance difference larger because track lengths is different between signal on different driving signal wire TX, signal wire is longer, its impedance is larger, the drive singal being input to each touch drive electrode is finally caused to have larger difference, and in order to realize touching preferably effect, the voltage magnitude of the signal on current drive signal line TX is all larger, the amplitude of the drive singal of the one chip touch-screen of such as 21.5 inches reaches more than 30V, so both add the operating load of touch chip, need again to increase boost chip in the periphery of touch chip, its peripheral circuit is made to become more complicated, add cost of manufacture.
Therefore, how reducing the difference of the drive singal being input to each touch drive electrode, improve touch-control effect, is those skilled in the art's technical matterss urgently to be resolved hurrily.
Summary of the invention
Embodiments provide a kind of touch-screen, its driving method and display device, in order to solve exist in prior art be input to differing greatly of the drive singal of each touch drive electrode, affect the problem of touch-control effect.
Embodiments provide a kind of touch-screen, comprise: many touch drive electrodes arranged along first direction, the touch sensible electrode that the second direction that many edges and first direction intersect is arranged, and many with described touch sensible electrode induced signal line one to one; Wherein, the touching signals that senses for exporting described touch sensible electrode of described induced signal line;
Also comprise: multiple and described touch drive electrode level shifting circuit one to one, for the power signal line to described level shifting circuit input power signal, and many and described level shifting circuit drive signal line one to one; Wherein,
Described drive signal line is used for described level shifting circuit input logic pulse signal;
Described level shifting circuit is used for the power supply signal that described power signal line inputs being input to corresponding described touch drive electrode under the control of described logic pulse signal.
In a kind of possible embodiment, in the above-mentioned touch-screen that the embodiment of the present invention provides, described level shifting circuit, specifically comprises: the first switching transistor, second switch transistor, the 3rd switching transistor and the 4th switching transistor; Wherein,
The grid of described first switching transistor is connected with described drive signal line, and source electrode is connected with ground level signal end, and drain electrode is connected with the grid of described 4th switching transistor with the drain electrode of described 3rd switching transistor respectively;
The signal of the grid input of described second switch transistor is contrary with the logic pulse signal polarity that described drive signal line inputs, source electrode is connected with described ground level signal end, and drain electrode is connected with signal output part with the grid of described 3rd switching transistor, the drain electrode of described 4th switching transistor respectively; Described signal output part is used for the described touch drive electrode input drive signal to correspondence;
The source electrode of described 3rd switching transistor is connected with described power signal line;
The source electrode of described 4th switching transistor is connected with described power signal line.
In a kind of possible embodiment, in the above-mentioned touch-screen that the embodiment of the present invention provides, described level shifting circuit, also comprises: phase inverter;
The input end of described phase inverter is connected with described drive signal line, and output terminal is connected with the grid of described second switch transistor;
The logic pulse signal that described phase inverter is used for described drive signal line to input carries out reversal of poles, and the signal after reversal of poles is input to the grid of described second switch transistor.
In a kind of possible embodiment, in the above-mentioned touch-screen that the embodiment of the present invention provides, described first switching transistor, second switch transistor, the 3rd switching transistor and the 4th switching transistor are synchronously made on the glass substrate of described touch-screen.
In a kind of possible embodiment, in the above-mentioned touch-screen that the embodiment of the present invention provides, the two ends of described touch drive electrode arrange a described level shifting circuit respectively.
In a kind of possible embodiment, in the above-mentioned touch-screen that the embodiment of the present invention provides, also comprise: touch chip;
Described touch chip is used for described drive signal line input logic pulse signal, and receives the touching signals of described induced signal line output.
Embodiments provide a kind of display device, comprise the above-mentioned touch-screen that the embodiment of the present invention provides.
Embodiments provide the driving method of the above-mentioned touch-screen that a kind of embodiment of the present invention provides, comprising:
By level shifting circuit input logic pulse signal described in described drive singal alignment;
When described logic pulse signal is high level signal, described level shifting circuit out-put supply signal is to corresponding described touch drive electrode, when described logic pulse signal is low level signal, described level shifting circuit exports ground level signal to corresponding described touch drive electrode;
Touch the voltage signal of drive electrode described in described touch sensible electrode coupling and exported by described induced signal line.
The beneficial effect of the embodiment of the present invention comprises:
Embodiments provide a kind of touch-screen, its driving method and display device, this touch-screen comprises: many touch drive electrodes arranged along first direction, the touch sensible electrode that the second direction that many edges and first direction intersect is arranged, and many with touch sensible electrode induced signal line one to one; Wherein, the touching signals that senses for exporting touch sensible electrode of induced signal line; This touch-screen also comprises: multiple with touch drive electrode level shifting circuit one to one, for the power signal line to level shifting circuit input power signal, and many with level shifting circuit drive signal line one to one; Wherein, drive signal line is used for level shifting circuit input logic pulse signal; Level shifting circuit is used for, under the control of logic pulse signal, the power supply signal that power signal line inputs is input to corresponding touch drive electrode.
Particularly, the touch-screen that the embodiment of the present invention provides by increasing level shifting circuit between drive signal line and touch drive electrode, and then drive signal line only needs to provide logic pulse signal, function is driven without the need to realizing, thus drive signal line can be done thinner, be conducive to realizing narrow frame design; Meanwhile, can do more drive signal line in same size situation, thus strengthen touch-control sensitivity, that only power supply signal cabling need be done is slightly wider to reduce impedance; And because drive singal is that timesharing drives successively, therefore the load of power signal line is identical with the load of the single drive signal line of original design, power consumption can't be increased, drive wire is replaced by a power signal line, only need reduce the impedance of power signal line, just effectively can improve the problem that drive singal line impedence in original design is excessive and resistance difference is large, be conducive to improving touch controllable function.
Accompanying drawing explanation
Fig. 1 is the structural representation of touch-screen in prior art;
The structural representation of the touch-screen that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the level shifting circuit that Fig. 3 provides for the embodiment of the present invention;
The driving method process flow diagram of the touch-screen that Fig. 4 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of touch-screen, its driving method and display device that the embodiment of the present invention provides is described in detail.
Embodiments provide a kind of touch-screen, as shown in Figure 2, can comprise: many touch drive electrodes 1 arranged along first direction, the touch sensible electrode 2 that the second direction that many edges and first direction intersect is arranged, and many and touch sensible electrode 2 induced signal line 3 one to one; Wherein, the touching signals that senses for exporting touch sensible electrode 2 of induced signal line 3;
Can also comprise: multiple with touch drive electrode 1 level shifting circuit 4 one to one, for the power signal line 5 to level shifting circuit 4 input power signal Vcc, and many with level shifting circuit 4 drive signal line 6 one to one; Wherein,
Drive signal line 6 is for level shifting circuit 4 input logic pulse signal;
Level shifting circuit 4 for being input to corresponding touch drive electrode 1 under the control of logic pulse signal by the power supply signal that power signal line 5 inputs.
The above-mentioned touch-screen that the embodiment of the present invention provides, by increasing level shifting circuit between drive signal line and touch drive electrode, and then drive signal line only needs to provide logic pulse signal, function is driven without the need to realizing, thus drive signal line can be done thinner, be conducive to realizing narrow frame design; Meanwhile, in same size situation, more drive signal line can be done, thus strengthen touch-control sensitivity, thus only power supply signal cabling need be done slightly wider to reduce impedance; And because drive singal is that timesharing drives successively, therefore the load of power signal line is identical with the load of the single drive signal line of original design, power consumption can't be increased, drive wire is replaced by a power signal line, only need reduce the impedance of power signal line, just effectively can improve the problem that drive singal line impedence in original design is excessive and resistance difference is large, be conducive to improving touch controllable function.
In the specific implementation, in the above-mentioned touch-screen that the embodiment of the present invention provides, as shown in Figure 3, level shifting circuit, can specifically comprise: the first switching transistor T1, second switch transistor T2, the 3rd switching transistor T3 and the 4th switching transistor T4; Wherein, the grid of the first switching transistor T1 is connected with drive signal line 6, and source electrode is connected with ground level signal end GND, and drain electrode is connected with the grid of the 4th switching transistor T4 with the drain electrode of the 3rd switching transistor T3 respectively; The signal of the grid input of second switch transistor T2 is contrary with the logic pulse signal polarity that drive signal line 6 inputs, source electrode is connected with ground level signal end GND, and drain electrode is connected with signal output part Vout with the grid of the 3rd switching transistor T3, the drain electrode of the 4th switching transistor T4 respectively; Signal output part Vout is used for touch drive electrode 1 input drive signal to correspondence; The source electrode of the 3rd switching transistor T3 is connected with power signal line 5; The source electrode of the 4th switching transistor T4 is connected with power signal line 5.
Particularly, in the above-mentioned touch-screen that the embodiment of the present invention provides, when the logic pulse signal that drive signal line 6 inputs is high level signal, then the first switching transistor T1 conducting, and then by the grid of the 4th switching transistor T4 and ground level signal end GND conducting, therefore the 4th switching transistor T4 conducting, the power supply signal Vcc that power signal line 5 inputs by the 4th switching transistor T4 of conducting outputs to signal output part Vout, therefore, the power driving signal that power signal line 5 inputs can be input to corresponding touch drive electrode by signal output part Vout, realize touching and drive scanning, meanwhile, the signal of the grid input of second switch transistor T2 is contrary with the logic pulse signal polarity that drive signal line 6 inputs, the i.e. grid input low level signal of now second switch transistor T2, second switch transistor T2 is ended, and then the 3rd switching transistor T3 is also in cut-off state.
When the logic pulse signal that drive signal line 6 inputs is low level signal, then the first switching transistor T1 ends, and then the 4th switching transistor T4 is also in cut-off state, meanwhile, the signal of the grid input of second switch transistor T2 is contrary with the logic pulse signal polarity that drive signal line 6 inputs, the i.e. grid input high level signal of now second switch transistor T2, make second switch transistor T2 conducting, the second switch transistor T2 of conducting is by the grid of the 3rd switching transistor T3 and ground level signal end GND conducting, therefore the 3rd switching transistor T3 conducting, the power supply signal Vcc that power signal line 5 inputs by the 3rd switching transistor T3 of conducting outputs to the grid of the 4th switching transistor T4, 4th switching transistor T4 ends, the second switch transistor T2 of conducting also by ground level signal end GND and signal output part Vout conducting, therefore, now signal output part Vout output low level signal, in summary, during drive signal line 6 input high level signal, then signal output part Vout out-put supply drive singal Vcc is to corresponding touch drive electrode, during drive signal line 6 input low level signal, then signal output part Vout also output low level signal to the touch drive electrode of correspondence.
In the specific implementation, in the above-mentioned touch-screen that the embodiment of the present invention provides, level shifting circuit, can also comprise: phase inverter; The input end of phase inverter is connected with drive signal line, and output terminal is connected with the grid of second switch transistor; The logic pulse signal that phase inverter is used for drive signal line inputs carries out reversal of poles, and the signal after reversal of poles is input to the grid of second switch transistor.Particularly, in the above-mentioned touch-screen that the embodiment of the present invention provides, during drive signal line input high level signal, then level shifting circuit is by the touch drive electrode of signal output part out-put supply drive singal to correspondence, during drive signal line input low level signal, then level shifting circuit is by the touch drive electrode of signal output part output low level signal to correspondence.In order to realize above-mentioned functions, the grid of the first switching transistor in level shifting circuit and the grid of second switch transistor at one time section need to input opposite polarity signal, during the grid input high level signal of i.e. the first switching transistor, during the grid input low level signal of second switch transistor, because the grid of the first switching transistor is connected with drive signal line, after therefore needing that the logic pulse signal that drive signal line inputs is carried out reversal of poles, be input to the grid of second switch transistor.Particularly, phase inverter can be adopted to realize the reversion of signal, signal after reversal of poles is input to the grid of second switch transistor, ensure that the signal of level shifting circuit in corresponding time period input correspondence is to touch drive electrode, realize the driven scanning of touch-screen, other can certainly be adopted can to realize the parts of signal reverse function, in this no limit.
In the specific implementation, in the above-mentioned touch-screen that the embodiment of the present invention provides, the first switching transistor, second switch transistor, the 3rd switching transistor and the 4th switching transistor can synchronously be made on the glass substrate of touch-screen.Particularly, in the above-mentioned touch-screen that the embodiment of the present invention provides, the switching transistor that level shifting circuit comprises synchronously can be made on glass substrate in touch-screen manufacturing process, do not need to increase extra manufacture craft, be conducive to the making adding level shifting circuit in touch-screen manufacturing process.
In the specific implementation, in the above-mentioned touch-screen that the embodiment of the present invention provides, the two ends touching drive electrode arrange a level shifting circuit respectively.Particularly, in the above-mentioned touch-screen that the embodiment of the present invention provides, can monolateral setting with touch drive electrode level shifting circuit one to one, also can bilateral setting with touch drive electrode level shifting circuit one to one, therefore above-mentioned level shifting circuit can be applicable to monolateral or bilateral two kinds of touch-control drive patterns, is conducive to the broad applicability improving touch-screen.
In the specific implementation, in the above-mentioned touch-screen that the embodiment of the present invention provides, can also comprise: touch chip; Touch chip is used for drive signal line input logic pulse signal, and receives the touching signals of induced signal line output.Particularly, in the above-mentioned touch-screen that the embodiment of the present invention provides, touch chip can timesharing to drive signal line input logic pulse signal, and then export corresponding drive singal to touch drive electrode by level shifting circuit, realize touch-control line by line and drive scanning, and the touching signals of induced signal line output can also be received, thus determine the position that touch-control occurs, realize the touch controllable function of touch-screen.
Based on same inventive concept, embodiments provide a kind of display device, comprise the above-mentioned touch-screen that the embodiment of the present invention provides.This display device can be: any product or parts with Presentation Function such as mobile phone, panel computer, televisor, display, notebook computer, digital album (digital photo frame), navigating instrument.The principle of dealing with problems due to this display device is similar to touch-screen, and therefore the enforcement of this display device see the enforcement of above-mentioned touch-screen, can repeat part and repeat no more.
Based on same inventive concept, embodiments provide the driving method of the above-mentioned touch-screen that a kind of embodiment of the present invention provides, as shown in Figure 4, can specifically comprise the following steps:
S101, by drive singal alignment level shifting circuit input logic pulse signal;
When S102, logic pulse signal are high level signal, level shifting circuit out-put supply signal is to corresponding touch drive electrode, and when logic pulse signal is low level signal, level shifting circuit exports ground level signal to corresponding touch drive electrode;
S103, touch sensible electrode coupling are touched the voltage signal of drive electrode and are exported by induced signal line.
Particularly, in the driving method of the above-mentioned touch-screen that the embodiment of the present invention provides, by drive signal line input logic pulse signal, and then export corresponding drive singal to touch drive electrode by level shifting circuit, and touch sensible electrode coupling is touched the voltage signal of drive electrode and is exported by induced signal line, finally can determine the position that touch-control occurs, thus realize the touch controllable function of touch-screen.Wherein by increasing level shifting circuit between drive signal line and touch drive electrode, and then drive signal line only needs to provide logic pulse signal, drive function without the need to realizing, thus drive signal line can be done thinner, advantageously in realizing narrow frame design; Meanwhile, can do more drive signal line in same size situation, thus strengthen touch-control sensitivity, that only power supply signal cabling need be done is slightly wider to reduce impedance; Simultaneously because drive singal is that timesharing drives successively, therefore the load of power signal line is identical with the load of the single drive signal line of original design, power consumption can't be increased, drive wire is replaced by a power signal line, only need reduce the impedance of power signal line, just effectively can improve the problem that drive singal line impedence in original design is excessive and resistance difference is large, be conducive to improving touch controllable function.
Embodiments provide a kind of touch-screen, its driving method and display device, this touch-screen comprises: many touch drive electrodes arranged along first direction, the touch sensible electrode that the second direction that many edges and first direction intersect is arranged, and many with touch sensible electrode induced signal line one to one; Wherein, the touching signals that senses for exporting touch sensible electrode of induced signal line; This touch-screen also comprises: multiple with touch drive electrode level shifting circuit one to one, for the power signal line to level shifting circuit input power signal, and many with level shifting circuit drive signal line one to one; Wherein, drive signal line is used for level shifting circuit input logic pulse signal; Level shifting circuit is used for, under the control of logic pulse signal, the power supply signal that power signal line inputs is input to corresponding touch drive electrode.
Particularly, the touch-screen that the embodiment of the present invention provides by increasing level shifting circuit between drive signal line and touch drive electrode, and then drive signal line only needs to provide logic pulse signal, function is driven without the need to realizing, thus drive signal line can be done thinner, be conducive to realizing narrow frame design; Meanwhile, in same size situation, more drive signal line can be done, thus strengthen touch-control sensitivity, thus only power supply signal cabling need be done slightly wider to reduce impedance; And because drive singal is that timesharing drives successively, therefore the load of power signal line is identical with the load of the single drive signal line of original design, power consumption can't be increased, drive wire is replaced by a power signal line, only need reduce the impedance of power signal line, just effectively can improve the problem that drive singal line impedence in original design is excessive and resistance difference is large, be conducive to improving touch controllable function.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. a touch-screen, comprising: many touch drive electrodes arranged along first direction, the touch sensible electrode that the second direction that many edges and first direction intersect is arranged, and many and described touch sensible electrode induced signal line one to one; Wherein, the touching signals that senses for exporting described touch sensible electrode of described induced signal line;
It is characterized in that, also comprise: multiple and described touch drive electrode level shifting circuit one to one, for the power signal line to described level shifting circuit input power signal, and many and described level shifting circuit drive signal line one to one; Wherein,
Described drive signal line is used for described level shifting circuit input logic pulse signal;
Described level shifting circuit is used for the power supply signal that described power signal line inputs being input to corresponding described touch drive electrode under the control of described logic pulse signal.
2. touch-screen as claimed in claim 1, it is characterized in that, described level shifting circuit, specifically comprises: the first switching transistor, second switch transistor, the 3rd switching transistor and the 4th switching transistor; Wherein,
The grid of described first switching transistor is connected with described drive signal line, and source electrode is connected with ground level signal end, and drain electrode is connected with the grid of described 4th switching transistor with the drain electrode of described 3rd switching transistor respectively;
The signal of the grid input of described second switch transistor is contrary with the logic pulse signal polarity that described drive signal line inputs, source electrode is connected with described ground level signal end, and drain electrode is connected with signal output part with the grid of described 3rd switching transistor, the drain electrode of described 4th switching transistor respectively; Described signal output part is used for the described touch drive electrode input drive signal to correspondence;
The source electrode of described 3rd switching transistor is connected with described power signal line;
The source electrode of described 4th switching transistor is connected with described power signal line.
3. touch-screen as claimed in claim 2, it is characterized in that, described level shifting circuit, also comprises: phase inverter;
The input end of described phase inverter is connected with described drive signal line, and output terminal is connected with the grid of described second switch transistor;
The logic pulse signal that described phase inverter is used for described drive signal line to input carries out reversal of poles, and the signal after reversal of poles is input to the grid of described second switch transistor.
4. touch-screen as claimed in claim 3, it is characterized in that, described first switching transistor, second switch transistor, the 3rd switching transistor and the 4th switching transistor are synchronously made on the glass substrate of described touch-screen.
5. the touch-screen as described in any one of claim 1-4, is characterized in that, the two ends of described touch drive electrode arrange a described level shifting circuit respectively.
6. touch-screen as claimed in claim 5, is characterized in that, also comprise: touch chip;
Described touch chip is used for described drive signal line input logic pulse signal, and receives the touching signals of described induced signal line output.
7. a display device, is characterized in that, comprises the touch-screen as described in any one of claim 1-6.
8. a driving method for the touch-screen as described in any one of claim 1-6, is characterized in that, comprising:
By level shifting circuit input logic pulse signal described in described drive singal alignment;
When described logic pulse signal is high level signal, described level shifting circuit out-put supply signal is to corresponding described touch drive electrode, when described logic pulse signal is low level signal, described level shifting circuit exports ground level signal to corresponding described touch drive electrode;
Touch the voltage signal of drive electrode described in described touch sensible electrode coupling and exported by described induced signal line.
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| 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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| CN101075419A (en) * | 2006-05-19 | 2007-11-21 | 株式会社日立显示器 | Image display device |
| US20070268219A1 (en) * | 2006-05-19 | 2007-11-22 | Tohru Kohno | Image display device |
| CN101190602A (en) * | 2006-11-22 | 2008-06-04 | 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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