CN104216592A - Touch panel and driving method thereof - Google Patents
Touch panel and driving method thereof Download PDFInfo
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- CN104216592A CN104216592A CN201410475089.7A CN201410475089A CN104216592A CN 104216592 A CN104216592 A CN 104216592A CN 201410475089 A CN201410475089 A CN 201410475089A CN 104216592 A CN104216592 A CN 104216592A
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Abstract
The invention discloses a touch panel and a driving method thereof. The touch panel comprises a first substrate and a second substrate, multiple first electrodes and multiple second electrodes, and multiple capacitance touch sensing electrodes, wherein the first substrate and the second substrate are oppositely arranged; the multiple first electrodes arranged along the first direction and the multiple second electrodes arranged along the second direction are positioned in the inside surface of the first substrate, or positioned in the inside surface of the second substrate; or the first electrodes are positioned in the inside surface of the first substrate, and the second electrodes are positioned in the inside surface of the second substrate; the first electrodes and the second electrodes are used as electromagnetic touch electrodes; the multiple capacitance touch sensing electrodes are positioned in the outside surface of the first substrate; the first electrode or the second electrode is multiplexed as the capacitance touch driving electrodes. The embedded touch panel integrated with electromagnetic input function and capacitance input function can be realized, so that the line complexity, thickness and cost of the touch panel can be reduced.
Description
Technical field
The present invention relates to display technique field, be specifically related to a kind of touch screen and driving method thereof.
Background technology
Along with the develop rapidly of display technique, touch screen (Touch Panel) spreads all in people's life gradually.With the traditional monitor of Presentation Function only can be provided compare, use the display of touch-screen can make user and show between main control system to carry out information interaction, therefore, touch screen can be completely or has been replaced at least partly conventional input media, existing display not only can be shown, can also touch control.
Common touch screen is divided into resistance type touch control screen, capacitance type touch control screen, electromagnetic touch-control screen and infrared ray interrupter-type touch screen etc.In prior art, the input equipment simultaneously with electromagnetism input and electric capacity input function does not but have Presentation Function, existing electromagnetic touch-control screen, generally to adopt external hanging type to fit together display panels and the module with electromagnetism input function, the module that is about to have electromagnetism input function fits in display panels outside, can make like this complex circuit of existing electromagnetic touch-control screen, the size of touch screen is caused to certain restriction, in addition, when thering is the module of electromagnetism input function, fit in behind display panels outside, owing to being subject to the impact of display panels internal components, touching signals can weaken, and the signal to noise ratio (S/N ratio) of touching signals reduces.
Summary of the invention
The object of this invention is to provide a kind of touch screen and driving method thereof, the touch screen of, integrated electromagnetism input function embedded to realize and electric capacity input function, electromagnetism touch-control and the integrated touch screen of capacitance touching control are extended to more large scale, improve the signal to noise ratio (S/N ratio) of electromagnetism touch-control and the integrated touch screen of capacitance touching control.
First aspect, the embodiment of the present invention provides touch screen, comprising:
The first substrate being oppositely arranged and second substrate;
A plurality of the first electrodes of arranging along first direction and a plurality of the second electrodes of arranging along second direction are all positioned at the inner surface of first substrate, or be all positioned at the inner surface of second substrate, or the first electrode is positioned at first substrate inner surface, the second electrode is positioned at second substrate inner surface; Described the first electrode and the second electrode are as electromagnetism touch-control electrode;
Be positioned at a plurality of capacitance touching control induction electrodes of described first substrate outer surface;
Wherein, multiplexing described the first electrode or the second electrode are as capacitance touching control drive electrode.
Second aspect, the embodiment of the present invention provides a kind of driving method of touch screen, and described touch screen is the touch screen described in above-mentioned first aspect, and described driving method comprises:
From described electromagnetism touch-control electrode, gather electromagnetic induction signal, to realize electromagnetism touch controllable function;
To described capacitance touching control drive electrode, provide electric capacity to drive signal;
Adopt capacitance touching control circuit to gather capacitive sensing signal from described capacitance touching control induction electrode, to realize capacitive touch function;
Wherein, described display driver circuit transmits control signal to described electromagnetism touch-control circuit and capacitance touching control circuit, to determine the time point that carries out electromagnetism touch-control or capacitance touching control.
The touch screen that the embodiment of the present invention provides and driving method thereof, can realize the touch screen of embedded, integrated electromagnetism input function and electric capacity input function, realized the integrated of demonstration and electromagnetism touch-control and capacitance touching control, electromagnetism touch-control and the integrated touch screen of capacitance touching control are extended to more large scale, improve the signal to noise ratio (S/N ratio) of electromagnetism touch-control and the integrated touch screen of capacitance touching control.
Accompanying drawing explanation
To the person of ordinary skill in the art is more clear that above-mentioned and other feature and advantage of the present invention by describe exemplary embodiment of the present invention in detail with reference to accompanying drawing below, in accompanying drawing:
Fig. 1 is the first electrode of touch screen and the cross section structure schematic diagram of the second electrode that the embodiment of the present invention one provides;
Fig. 2 is the first electrode of touch screen and the plan structure schematic diagram of the second electrode that the embodiment of the present invention one provides;
Fig. 3 is the plan structure schematic diagram of the bridge that provides of the embodiment of the present invention one;
Fig. 4 is the first connection diagram that touch screen that the embodiment of the present invention one provides is realized electromagnetism touch-control and capacitance touching control;
Fig. 5 is the second connection diagram that touch screen that the embodiment of the present invention one provides is realized electromagnetism touch-control and capacitance touching control;
Fig. 6 is the third connection diagram that touch screen that the embodiment of the present invention one provides is realized electromagnetism touch-control and capacitance touching control;
Fig. 7 is the connection diagram of electromagnetism touch-control circuit and electromagnetism touch-control electrode in the touch screen that provides of the embodiment of the present invention one;
Fig. 8 is the capacitance touching control circuit that provides of the embodiment of the present invention one and the connection diagram of capacitance touching control induction electrode;
Fig. 9 is the cross section structure schematic diagram of the touch screen that provides of the embodiment of the present invention two;
Figure 10 is the cross section structure schematic diagram of the touch screen that provides of the embodiment of the present invention three;
Figure 11 is the cross section structure schematic diagram of the touch screen that provides of the embodiment of the present invention four;
Figure 12 is the cross section structure schematic diagram of the touch screen that provides of the embodiment of the present invention five;
Figure 13 is the process flow diagram of the driving method of the touch screen that provides of the embodiment of the present invention six.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, in accompanying drawing, only show part related to the present invention but not full content, and in accompanying drawing, same or similar label represents same or similar element or has the element of identical or similar functions.
Fig. 1 is the cross section structure schematic diagram of the touch screen that provides of the embodiment of the present invention one, refer to Fig. 1, the touch screen that the present embodiment provides comprises: the first substrate 11 being oppositely arranged and second substrate 12, a plurality of the first electrodes 13 of arranging along first direction and a plurality of the second electrodes 14 of arranging along second direction are all positioned at the inner surface of first substrate 11, the first electrode 13 and the second electrode 14 are as electromagnetism touch-control electrode, be positioned at a plurality of capacitance touching control induction electrodes 15 of first substrate 11 outer surfaces, wherein, multiplexing the first electrode 13 or the second electrode 14 are as capacitance touching control drive electrode.
Described electromagnetism touch-control electrode is different from the material of capacitance touching control induction electrode 15, the material of described electromagnetism touch-control electrode is metal material, the material of described capacitance touching control induction electrode is transparent conductive material or metal grill, wherein, transparent conductive material can be the combination of any one or they in indium tin oxide (ITO), indium-zinc oxide (IZO).
Optionally, as shown in Figure 2, Fig. 2 is the first electrode 13 of touch screen and the plan structure schematic diagram of the second electrode 14 that the embodiment of the present invention one provides, described first direction and second direction are intersected, optionally, described first direction and second direction are square crossing, in the present embodiment, described first direction is designated as directions X, described second direction is designated as Y-direction, and wherein, directions X is vertical with Y-direction, also can be designated as Y-direction by described first direction, described second direction is designated as directions X.In addition, a plurality of the first electrodes 13 are arranged along first direction, but each first electrode 13 extends along second direction; A plurality of the second electrodes 14 are arranged along second direction, but each second electrode 14 extends along first direction.In the present embodiment, the first electrode is mutually vertical with the second electrode, and the bearing of trend of the bearing of trend of described electric capacity drive electrode and described capacitance touching control induction electrode is mutually vertical.
Optionally, refer to Fig. 1, first substrate 11 is color membrane substrates, second substrate 12 is array base palte, described color membrane substrates comprises that black-matrix layer 18, the first electrodes 13, the second electrode 14 and the capacitance touching control drive electrode that are positioned at first substrate 11 inner sides are covered in black-matrix layer 18 towards the one side of array base palte 12.The material of black-matrix layer 18 is for example metal (for example chromium), graphite or resin type material, and it is formed at color membrane substrates inner side, and can form black matrix structure.
Optionally, please continue referring to Fig. 1, a plurality of the first electrodes 13 of arranging along first direction and a plurality of the second electrodes 14 of arranging along second direction are all positioned at first substrate 11 inner surfaces, described a plurality of the first electrode and a plurality of the second electrode are all positioned at the first metal layer and electrically insulated from one another, the first electrode 13 and the second electrode 14 are positioned at same layer, at the first electrode 13 and the second electrode 14 infalls, the first electrode 13 is electrically connected to by being arranged at the bridge a of the second metal level, and described bridge can adopt transparent conductive material or metal to make.
Further, the first metal layer and the second metal level are by color filter film 19 electrical isolations, and each first electrode 13 is partitioned into multistage by a plurality of the second electrodes 14, and the bridge a that is arranged at the second metal level is electrically connected to multistage the first electrode.Referring to Fig. 3, Fig. 3 is the plan structure schematic diagram of the bridge a that provides of the embodiment of the present invention one, and described the first electrode is electrically connected to by described bridge.
Further, please continue referring to Fig. 1, the first metal layer is positioned at black-matrix layer 18 towards the one side of described array base palte, by described black-matrix layer, blocked, the layer at the first electrode 13 and the second electrode 14 places is positioned at black-matrix layer 18 towards the one side of described array base palte, by described black-matrix layer, is blocked.
Particularly, touch screen shown in Fig. 1 can also comprise: the tft array 21 on array base palte 12, the liquid crystal layer on tft array 21 22, at the conductive pane glue 23 between color filter film 19 and tft array 21, planarization layer 24 between liquid crystal layer 22 and the second metal level, planarization layer 24, for making the face of color membrane substrates 11 more smooth, makes the thickness of liquid crystal layer 22 more even simultaneously.
In the touch screen that the embodiment of the present invention one provides, the first electrode 13 and the second electrode 14 are all positioned at first substrate 11 inner surfaces as electromagnetism touch-control electrode, multiplexing the first electrode 13 of take is example as capacitance touching control drive electrode, and connection diagram and principle of work that the touch screen that further illustrates the embodiment of the present invention one and provide below in conjunction with Fig. 4-Fig. 6 is realized electromagnetism touch-control and capacitance touching control are described.
Fig. 4 is the first connection diagram that touch screen that the embodiment of the present invention one provides is realized electromagnetism touch-control and capacitance touching control, refer to Fig. 4, described touch screen also comprises electromagnetism touch-control circuit, capacitance touching control circuit and display driver circuit, wherein, electromagnetism touch-control circuit is electrically connected to electromagnetism touch-control electrode, be used for receiving electromagnetic induction signal, capacitance touching control circuit is electrically connected to electric capacity drive electrode, be used for providing electric capacity to drive signal, and capacitance touching control circuit and capacitance touching control induction electrode 15 are electrically connected to, be used for receiving capacitive sensing signal, display driver circuit transmits control signal to electromagnetism touch-control circuit and capacitance touching control circuit respectively, to determine the time point of electromagnetism touch-control or capacitance touching control.
In touch screen, show that idle time period is generally referred to as blank (blank) district, for example: the field-scanning period of a two field picture is 60Hz, cycle is 16.67ms, but, touch screen, when carrying out actual field scan, is generally used 11ms～12ms just to complete field scan, and the remaining time period (4.67ms～5.67ms) in field-scanning period is referred to as to blank district, show that working time section only takies the 11ms left and right time, the remaining time is for touch-control.
At the touch screen described in Fig. 4, realize in the first connection diagram of electromagnetism touch-control and capacitance touching control, when image shows end, display driver circuit transmits control signal to electromagnetism touch-control circuit and capacitance touching control circuit respectively, inform that electromagnetism touch-control circuit touch screen is in blank district, electromagnetism touch-control circuit carries out electromagnetic scanning according to described control signal, judged whether electromagnetic signal input, now capacitance touching control circuit is in high-impedance state, when the judgement of electromagnetism touch-control circuit has electromagnetic signal input, directly enter the electromagnetism touch-control report spot scan stage until blank end of extent, in this process, capacitance touching control circuit is in high-impedance state, do not communicate, when the judgement of electromagnetism touch-control circuit does not have electromagnetic signal input, electromagnetism touch-control circuit automatically becomes high-impedance state and transmits control signal to capacitance touching control circuit, capacitance touching control circuit receives control signal of living in and carries out capacitance touching control scanning until blank end of extent, while carrying out capacitance touching control scanning, electric capacity drives signal to be provided by capacitance touching control circuit, described capacitance touching control induction electrode 15 receives capacitive sensing signal, realizes capacitance touching control scanning.
It should be noted that, in foregoing description, adopt electromagnetism touch-control as preferential touch control manner, can certainly adopt capacitance touching control as preferential touch control manner, or the touch control manner that can also adopt electromagnetism touch-control and capacitance touching control simultaneously to scan, wherein, adopt capacitance touching control identical as the principle of preferential touch control manner with employing capacitance touching control as the principle of work of preferential touch control manner, do not repeat them here, below by the principle of work of the touch control manner that describe to adopt electromagnetism touch-control and capacitance touching control to scan simultaneously.
At the touch screen described in Fig. 4, realize in the first connection diagram of electromagnetism touch-control and capacitance touching control, when image shows end, display driver circuit transmits control signal to electromagnetism touch-control circuit respectively, inform that electromagnetism touch-control circuit and capacitance touching control circuit touch screen are in blank district, described electromagnetism touch-control circuit and capacitance touching control circuit scan according to described control signal simultaneously, corresponding electromagnetic signal and/or capacitance signal input have been judged whether, herein, what while scanning due to electromagnetism touch-control, use is not shared with capacitance touching control electrode (the second electrode), capacitance touching control circuit itself can be used the capacitance touching control drive electrode in viewing area to carry out a full screen scanning and (use self-capacitance scan mode, all capacitance touching control drive electrode reads once, judged whether that electric capacity drives signal input, and do not need detection position information), when the judgement of electromagnetism touch-control circuit has electromagnetic signal input and capacitance touching control circuit judges to have capacitance signal input, can be set to electromagnetism touch-control preferential, or it is preferential also can be set to capacitance touching control, when electromagnetism touch-control circuit and capacitance touching control circuit judges only exist a kind of input signal, carry out corresponding touch-control scanning, when electromagnetism touch-control circuit and capacitance touching control circuit all judge that while there is no signal input, this time do not scan, to reduce the power consumption of touch screen.
Fig. 5 is the second connection diagram that touch screen that the embodiment of the present invention one provides is realized electromagnetism touch-control and capacitance touching control, refer to Fig. 5, described touch screen also comprises electromagnetism touch-control circuit, capacitance touching control circuit and display driver circuit, wherein: electromagnetism touch-control circuit is electrically connected to electromagnetism touch-control electrode, be used for receiving electromagnetic induction signal, display driver circuit is electrically connected to capacitance touching control drive electrode, be used for providing electric capacity to drive signal, capacitance touching control circuit is electrically connected to capacitance touching control induction electrode, be used for receiving capacitive sensing signal, display driver circuit transmits control signal to described electromagnetism touch-control circuit and described capacitance touching control circuit respectively, to determine the time point that carries out electromagnetism touch-control or capacitance touching control.
At the touch screen described in Fig. 5, realize in the second connection diagram of electromagnetism touch-control and capacitance touching control, when image shows end, display driver circuit transmits control signal to electromagnetism touch-control circuit and capacitance touching control circuit respectively, inform that electromagnetism touch-control circuit and capacitance touching control circuit touch screen are in blank district, electromagnetism touch-control circuit scans according to described control signal, judged whether electromagnetic signal input, now capacitance touching control circuit is in high-impedance state, when the judgement of electromagnetism touch-control circuit has electromagnetic signal input, directly enter the electromagnetism touch-control report spot scan stage until blank end of extent, in this process, capacitance touching control circuit is in high-impedance state, do not communicate, when the judgement of electromagnetism touch-control circuit does not have electromagnetic signal input, electromagnetism touch-control circuit automatically becomes high-impedance state and transmits control signal to capacitance touching control circuit, capacitance touching control circuit receives described touching signals and carries out capacitance touching control scanning and know blank end of extent, when capacitance touching control scans, electric capacity drives signal to be provided by display driver circuit, and transmit control signal to capacitance touching control circuit, a capacitance touching control circuit scanning capacitance touch-control sensing electrode.
It should be noted that, in foregoing description, adopt electromagnetism touch-control as preferential touch control manner, can certainly adopt capacitance touching control as preferential touch control manner, or the touch control manner that can also adopt electromagnetism touch-control and capacitance touching control simultaneously to scan, wherein, adopt capacitance touching control identical as the principle of preferential touch control manner with employing capacitance touching control as the principle of work of preferential touch control manner, adopt touch control manner that electromagnetism touch-control scans with capacitance touching control simultaneously and above-mentioned touch screen to realize the principle of work of the first structure of electromagnetism touch-control and capacitance touching control identical, do not repeat them here.
Fig. 6 is the third connection diagram that touch screen that the embodiment of the present invention one provides is realized electromagnetism touch-control and capacitance touching control, refer to Fig. 6, described touch screen also comprises electromagnetism touch-control circuit, capacitance touching control circuit and display driver circuit, wherein, electromagnetism touch-control circuit is electrically connected to electromagnetism touch-control electrode, be used for receiving electromagnetic induction signal, and electromagnetism touch-control circuit and capacitance touching control drive electrode are electrically connected to, be used for providing electric capacity to drive signal, capacitance touching control circuit is electrically connected to capacitance touching control induction electrode, be used for receiving capacitive sensing signal, display driver circuit transmits control signal to electromagnetism touch-control circuit and capacitance touching control circuit respectively, to determine the time point that carries out electromagnetism touch-control or capacitance touching control.
At the touch screen shown in Fig. 6, realize in the third connection diagram of electromagnetism touch-control and capacitance touching control, when image shows end, display driver circuit transmits control signal to electromagnetism touch-control circuit and capacitance touching control circuit respectively, inform that electromagnetism touch-control circuit and capacitance touching control circuit touch screen are in blank district, electromagnetism touch-control circuit scans according to described control signal, judged whether electromagnetic signal input, now capacitance touching control circuit is in high-impedance state, when the judgement of electromagnetism touch-control circuit has electromagnetic signal input, directly enter the electromagnetism touch-control report spot scan stage until blank end of extent, in this process, capacitance touching control circuit is in high-impedance state, do not communicate, when the judgement of electromagnetism touch-control circuit does not have electromagnetic signal input, electromagnetism touch-control circuit automatically becomes high-impedance state and transmits control signal to capacitance touching control circuit, capacitance touching control circuit receives described touching signals and carries out capacitance touching control scanning and know blank end of extent, when capacitance touching control scans, electric capacity drives signal to be provided by electromagnetism touch-control driving circuit, and transmit control signal to capacitance touching control circuit, a capacitance touching control circuit scanning capacitance touch-control sensing electrode.
It should be noted that, in foregoing description, adopt electromagnetism touch-control as preferential touch control manner, can certainly adopt capacitance touching control as preferential touch control manner, or the touch control manner that can also adopt electromagnetism touch-control and capacitance touching control simultaneously to scan, wherein, adopt capacitance touching control identical as the principle of preferential touch control manner with employing capacitance touching control as the principle of work of preferential touch control manner, adopt touch control manner that electromagnetism touch-control scans with capacitance touching control simultaneously and above-mentioned touch screen to realize the principle of work of the first structure of electromagnetism touch-control and capacitance touching control identical, do not repeat them here.
Also it should be noted that, at the touch screen shown in Fig. 4-Fig. 6, realize in three kinds of connection diagrams of electromagnetism touch-control and capacitance touching control, when time writer is passive electrical magnetic pen, not needing provides Electromagnetic Drive signal to described electromagnetism touch-control electrode; When time writer is active time writer, need to provide Electromagnetic Drive signal to described electromagnetism touch-control electrode.
Optionally, at the touch screen shown in Fig. 4-Fig. 6, realize in three kinds of connection diagrams of electromagnetism touch-control and capacitance touching control, electromagnetism touch-control circuit is connected with the two ends of electromagnetism touch-control electrode, referring to Fig. 7, Fig. 7 is the connection diagram of electromagnetism touch-control circuit and electromagnetism touch-control electrode in the touch screen that provides of the embodiment of the present invention one.Capacitance touching control circuit is connected with one end of capacitance touching control induction electrode, referring to Fig. 8, Fig. 8 is the capacitance touching control circuit that provides of the embodiment of the present invention one and the connection diagram of capacitance touching control induction electrode, particularly, capacitance touching control circuit can pass through flexible PCB (Flexible Printed Circuit, be called for short FPC) be connected with one end of capacitance touching control induction electrode, detecting electrode when described capacitance touching control induction electrode is used for as capacitance touching control, be positioned at the capacitance touching control induction electrode in first substrate outside and be positioned at second substrate medial surface and carry out capacitance touching control to the capacitance touching control drive electrode acting in conjunction of second substrate one side, capacitance touching control drive electrode is owing to adopting metal material to make, therefore its resistance is less, can effectively reduce the RC of capacitance touching control drive electrode, reduce the duration of charging, capacitance touching control induction electrode is simple in structure, and the noise source away from touch screen, be conducive to improve the signal to noise ratio (S/N ratio) (SNR) of touch screen, in addition, because adopting metal material, makes at electromagnetism touch-control electrode, its resistance is less, SNR in the time of can effectively reducing electromagnetism touch-control.
Optionally, at the touch screen shown in Fig. 4-Fig. 6, realize electromagnetism touch-control and capacitance touching control three kinds and be connected in signal, the demonstration of described touch screen and capacitance touching control time-sharing work; The demonstration of described touch screen and electromagnetism touch-control time-sharing work; The electromagnetism touch-control of described touch screen and capacitance touching control time-sharing work, thus the SNR of touch screen can further be improved.
The touch screen that the embodiment of the present invention one provides, inner surface by the inner surface at first substrate or second substrate arranges a plurality of the first electrodes of arranging along first direction and a plurality of the second electrodes of arranging along second direction, or at first substrate inner surface, the first electrode is set, at second substrate inner surface, the second electrode is set, using described the first electrode and the second electrode as electromagnetism touch-control electrode, at first substrate outer surface, a plurality of capacitance touching control induction electrodes are set, wherein, multiplexing described the first electrode or the second electrode are as capacitance touching control drive electrode, touch screen not only can be shown normally, and when carrying out touch-control without increasing extra electromagnetism touch control component and capacitance touching control assembly, just can realize Presentation Function and electromagnetism touch controllable function and capacitive touch function, thereby touch-control display panel has been realized the integrated of demonstration and electromagnetism touch-control and capacitance touching control, thereby reduced the cost of touch screen, thickness and weight, and multiplexing the first electrode or the second electrode are as electric capacity drive electrode, the capacitive sensing electrode structure that is positioned at first substrate outside is simple, thereby network complexity is reduced, by the more large scale that extends to of electromagnetism touch-control and the integrated touch screen of capacitance touching control, improve the signal to noise ratio (S/N ratio) of electromagnetism touch-control and the integrated touch screen of capacitance touching control.
Fig. 9 is the cross section structure schematic diagram of the touch screen that provides of the embodiment of the present invention two, this embodiment be take above-described embodiment one as basis, the part identical with the first embodiment repeats no more in the present embodiment, be with the difference of embodiment mono-, described the first metal layer and the second metal level are by organic hyaline membrane 20 electrical isolations.
It should be noted that, when the first metal layer 16 and the second metal level are during by organic hyaline membrane 20 electrical isolation, refer to Fig. 9, described touch screen can also comprise: the tft array 21 on array base palte 12, the liquid crystal layer on tft array 21 22, at the conductive pane glue 23 between organic hyaline membrane 20 and tft array 21, planarization layer 24 between liquid crystal layer 22 and the second metal level also comprise color filter film 19 between the second metal level and planarization layer 24.
Connection diagram and principle of work that the touch screen that the touch screen that the embodiment of the present invention two provides is realized the connection diagram of electromagnetism touch-control and capacitance touching control to be provided with the embodiment of the present invention one with principle of work is realized electromagnetism touch-control and capacitance touching control are identical, do not repeat them here.
Figure 10 is the cross section structure schematic diagram of the touch screen that provides of the embodiment of the present invention three, this embodiment be take above-described embodiment as basis, part same as the previously described embodiments repeats no more, and is with the difference of above-described embodiment, and the first electrode 13 and the second electrode 14 are positioned at different metal levels.
Refer to Figure 10, when a plurality of the first electrodes 13 of arranging along first direction and a plurality of the second electrodes 14 of arranging along second direction are all positioned at first substrate 11 inner surface, a plurality of the first electrodes 13 and a plurality of the second electrode 14 lay respectively at the first metal layer and the second metal level, electrical isolation between described the first metal layer and the second metal level.Particularly, the first metal layer and the second metal level can be by being arranged at color filter film 19 or organic hyaline membrane 20 electrical isolations between the first metal layer and the second metal level.When the first electrode 13 and the second electrode 14 are positioned at different metal levels, do not need to arrange bridge.
Connection diagram and principle of work that the touch screen that the touch screen that the embodiment of the present invention three provides is realized the connection diagram of electromagnetism touch-control and capacitance touching control to be provided with the above embodiment of the present invention with principle of work is realized electromagnetism touch-control and capacitance touching control are identical, do not repeat them here.
Figure 11 is the cross section structure schematic diagram of the touch screen that provides of the embodiment of the present invention four, refer to Figure 11, the touch screen that the present embodiment provides comprises: the first substrate 11 being oppositely arranged and second substrate 12, a plurality of the first electrodes 13 of arranging along first direction and a plurality of the second electrodes 14 of arranging along second direction are all positioned at the inner surface of second substrate 12, the first electrode 13 and the second electrode 14 are as electromagnetism touch-control electrode, be positioned at a plurality of capacitance touching control induction electrodes 15 of first substrate 11 outer surfaces, wherein, multiplexing the first electrode 13 or the second electrode 14 are as capacitance touching control drive electrode.
Optionally, described first direction is mutually vertical with second direction, described electromagnetism touch-control sensing electrode is mutually vertical with described capacitance touching control drive electrode, described electromagnetism touch-control electrode is different from the material of capacitance touching control induction electrode 15, the material of described electromagnetism touch-control electrode is metal material, the material of described capacitance touching control induction electrode is transparent conductive material or metal grill, wherein, transparent conductive material can be the combination of any one or they in indium tin oxide (ITO), indium-zinc oxide (IZO).
Optionally, refer to Figure 11, first substrate 11 is color membrane substrates, second substrate 12 is array base palte, and a plurality of the first electrodes 13 and a plurality of the second electrode 14 can be positioned at the first metal layer and electrically insulated from one another, and the first electrode 13 and the second electrode 14 are positioned at same layer, at the first electrode 13 and the second electrode 14 infalls, the first electrode 13 is electrically connected to by being arranged at the bridge a of the second metal level, preferred, and the first metal layer and the second metal level are by color filter film 19 electrical isolations.
It will be understood by those skilled in the art that touch screen described herein is only for explaining the present invention, but not limitation of the invention.Figure 11 has just enumerated the form of touch screen structure and electrode setting, do not represent it can only is this kind of structure, do not represent each parts comprising shown in figure yet, do not represent to adopt this kind of electrode setting yet, for example, a plurality of the first electrodes 13 of arranging along first direction and a plurality of the second electrodes 14 of arranging along second direction are all positioned at the inner surface of second substrate 12, the first electrode 13 and the second electrode 14 lay respectively at different metal levels, and electrical isolation between different metal levels, therefore, the schematic structure that should not using in Figure 11 is as the restriction to the embodiment of the present invention.
It should be noted that, in Figure 11, schematically marked first substrate 11, second substrate 12, the first electrode 13, the second electrode 14, bridge a, capacitance touching control induction electrode 15 and be clipped in first substrate 11 and second substrate 12 between liquid crystal layer 40, because the structure of touch screen can be multiple, therefore, rete between first substrate 11 and second substrate 12 also can be various, in the present embodiment, the concrete rete between first substrate 11 and second substrate 12 or structure are not carried out to refinement, as long as the first electrode 13 and the second electrode 14 are as electromagnetism touch-control electrode, multiplexing described the first electrode or the second electrode are as capacitance touching control drive electrode, capacitance touching control induction electrode 15 is positioned at first substrate 11 outer surfaces, it is the top that above-mentioned middle capacitance touching control induction electrode is positioned at capacitance touching control drive electrode.Therefore, should not using Figure 11 as the restriction to the present embodiment structure.And, be the emphasis of clear reflection the present embodiment, in Figure 11, the uncorrelated rete between described first substrate and second substrate is corresponding omission all, should not limit the present embodiment with this.
Connection diagram and principle of work that the touch screen that the touch screen that the embodiment of the present invention four provides is realized the connection diagram of electromagnetism touch-control and capacitance touching control to be provided with the embodiment of the present invention one with principle of work is realized electromagnetism touch-control and capacitance touching control are identical, do not repeat them here.
Figure 12 is the cross section structure schematic diagram of the touch screen that provides of the embodiment of the present invention five, refer to Figure 12, the touch screen that the present embodiment provides comprises: the first substrate 11 being oppositely arranged and second substrate 12, a plurality of the first electrodes 13 of arranging along first direction are positioned at first substrate 11 inner surfaces, a plurality of the second electrodes 14 of arranging along second direction are positioned at second substrate 12 inner surfaces, the first electrode 13 and the second electrode 14 are as electromagnetism touch-control electrode, be positioned at a plurality of capacitance touching control induction electrodes of first substrate 11 outer surfaces, wherein, multiplexing the first electrode 13 or the second electrode 14 are as capacitance touching control drive electrode.
Optionally, described first direction is mutually vertical with second direction, described electromagnetism touch-control sensing electrode is mutually vertical with described capacitance touching control drive electrode, described electromagnetism touch-control electrode is different from the material of capacitance touching control induction electrode 15, the material of described electromagnetism touch-control electrode is metal material, the material of described capacitance touching control induction electrode is transparent conductive material or metal grill, wherein, transparent conductive material can be the combination of any one or they in indium tin oxide (ITO), indium-zinc oxide (IZO).
Optionally, refer to Figure 12, first substrate 11 is color membrane substrates, second substrate 12 is array base palte, a plurality of the first electrodes 13 are positioned at color membrane substrates inner surface, and between a plurality of the first electrodes 13, can carry out electrical isolation by color filter film 19, a plurality of the second electrodes 14 are positioned at described array base palte inner surface.
It should be noted that, in Figure 12, schematically marked first substrate 11, second substrate 12, the first electrode 13, the second electrode 14, capacitance touching control induction electrode 15, color filter film 19 and be clipped in first substrate 11 and second substrate 12 between liquid crystal layer 40, because the structure of touch screen can be multiple, therefore, rete between first substrate 11 and second substrate 12 also can be various, in the present embodiment, the concrete rete between first substrate 11 and second substrate 12 or structure are not carried out to refinement, as long as the first electrode 13 and the second electrode 14 are as electromagnetism touch-control electrode, multiplexing described the first electrode or the second electrode are as capacitance touching control drive electrode, capacitance touching control induction electrode 15 is positioned at first substrate 11 outer surfaces, it is the top that above-mentioned middle capacitance touching control induction electrode is positioned at capacitance touching control drive electrode.Therefore, should not using Figure 12 as the restriction to the present embodiment structure.And, be the emphasis of clear reflection the present embodiment, in Figure 12, the uncorrelated rete between described first substrate and second substrate is corresponding omission all, should not limit the present embodiment with this.
Connection diagram and principle of work that the touch screen that the touch screen that the embodiment of the present invention five provides is realized the connection diagram of electromagnetism touch-control and capacitance touching control to be provided with the embodiment of the present invention one with principle of work is realized electromagnetism touch-control and capacitance touching control are identical, do not repeat them here.
Figure 13 is the process flow diagram of the driving method of the touch screen that provides of the embodiment of the present invention six, in order to the touch screen that above-described embodiment is provided, drive, described touch screen comprises: the first substrate being oppositely arranged and second substrate, a plurality of the first electrodes of arranging along first direction and a plurality of the second electrodes of arranging along second direction are all positioned at the inner surface of first substrate, or be all positioned at the inner surface of second substrate, or the first electrode is positioned at first substrate inner surface, the second electrode is positioned at second substrate inner surface; Described the first electrode and the second electrode are as electromagnetism touch-control electrode; Be positioned at a plurality of capacitance touching control induction electrodes of described first substrate outer surface, wherein, multiplexing described the first electrode or the second electrode are as capacitance touching control drive electrode.
Refer to Figure 13, the driving method of described touch-control comprises:
Step 21, from described electromagnetism touch-control electrode, gather electromagnetic induction signal, to realize electromagnetism touch controllable function.
In this step, be a described touch screen collocation time writer (or electromagnetism pointer).If time writer is active time writer, an electromagnetism touch-control electrode inductive electromagnetic touching signals, and produce induction current; If time writer is passive electrical magnetic pen, needing provides Electromagnetic Drive signal to described electromagnetism touch-control electrode, and particularly, electromagnetism touch-control sensing electrode can first provide Electromagnetic Drive signal by electromagnetism touch-control circuit, then electromagnetism touch-control sensing electrode inductive electromagnetic touching signals again, and produce induction current.The passive electrical magnetic pen of take below describes as example.
Passive electrical magnetic pen is built-in with resonance circuit.Touch screen is injected passive electrical magnetic pen by transmitting frequency electromagnetic waves by energy, by passive electrical magnetic pen, electromagnetism touching signals is back to touch screen again, now touch screen stops sending electromagnetic wave, and switch to reception mode of electromagnetic wave, when neighbouring while having time writer, to there is electromagnetic induction in the electromagnetism touch-control electrode in touch screen, the first electrode of first direction and the second electrode of second direction for electromagnetism touch-control produce induction current, thereby according to described induction current, can determine the coordinate of first direction and the coordinate of second direction of passive electrical magnetic pen position.Particularly, the first testing circuit and the second testing circuit can be set in touch screen, the first testing circuit is for responding to the induction current of the first electrode generation the coordinate that process is processed the first direction that obtains passive electrical magnetic pen position, the second testing circuit is for responding to the induction current of the second electrode generation the coordinate that process is processed the second direction that obtains passive electrical magnetic pen position, obtain, after the first direction coordinate and second direction coordinate of passive electrical magnetic pen position, just can determining the position of passive electrical magnetic pen.
Step 22, to described capacitance touching control drive electrode, provide electric capacity to drive signal.
In this step, described capacitance touching control drives signal to be provided by electromagnetism touch-control circuit, or is provided by capacitance touching control circuit, or is provided by display driver circuit.
When described capacitance touching control drives signal to be provided by electromagnetism touch-control circuit or display driver circuit, described capacitance touching control circuit only need to gather capacitive sensing signal, when described capacitance touching control drive electrode is provided by capacitance touching control circuit, described capacitance touching control circuit had both needed to provide electric capacity to drive signal, needed again to gather capacitive sensing signal.
Step 23, employing capacitance touching control circuit gather capacitive sensing signal from described capacitance touching control induction electrode, to realize capacitive touch function, wherein, described display driver circuit transmits control signal to described electromagnetism touch-control circuit and capacitance touching control circuit, to determine the time point that carries out electromagnetism touch-control or capacitance touching control.
In this step, adopt capacitance touching control circuit to gather capacitive sensing signal from capacitance touching control induction electrode, according to the variation of capacitive sensing signal, determine the position of carrying out capacitance touching control.
In the present embodiment, described display driver circuit transmits control signal to described electromagnetism touch-control circuit and capacitance touching control circuit, to determine the time point that carries out electromagnetism touch-control or capacitance touching control, inform that electromagnetism touch-control circuit touch screen is in blank district, electromagnetism touch-control circuit carries out electromagnetic scanning according to described control signal, judged whether electromagnetic signal input, now capacitance touching control circuit is in high-impedance state, when the judgement of electromagnetism touch-control circuit has electromagnetic signal input, directly enter the electromagnetism touch-control report spot scan stage until blank end of extent, in this process, capacitance touching control circuit is in high-impedance state, do not communicate, when the judgement of electromagnetism touch-control circuit does not have electromagnetic signal input, electromagnetism touch-control circuit automatically becomes high-impedance state and transmits control signal to capacitance touching control circuit, capacitance touching control circuit receives control signal of living in and carries out capacitance touching control scanning until blank end of extent, while carrying out capacitance touching control scanning, with electric capacity, driving signal to be provided as example by capacitance touching control circuit describes, electric capacity drives signal to be provided by capacitance touching control circuit, described capacitance touching control induction electrode receives capacitive sensing signal, realizes capacitance touching control scanning.
It should be noted that, in foregoing description, adopt electromagnetism touch-control as preferential touch control manner, can certainly adopt capacitance touching control as preferential touch control manner, or the touch control manner that can also adopt electromagnetism touch-control and capacitance touching control simultaneously to scan, wherein, adopt capacitance touching control identical as the principle of preferential touch control manner with employing capacitance touching control as the principle of work of preferential touch control manner, the principle of work of the first structure that the principle of work that adopts the touch control manner that electromagnetism touch-control scans with capacitance touching control simultaneously and touch screen in embodiment mono-are realized electromagnetism touch-control and capacitance touching control is identical, do not repeat them here.
Preferably, the demonstration of described touch screen and capacitance touching control time-sharing work; And the demonstration of described touch screen and electromagnetism touch-control time-sharing work; The electromagnetism touch-control of described touch screen and capacitance touching control time-sharing work.
The driving method of the touch screen that the embodiment of the present invention six provides, when carrying out touch-control without increasing extra electromagnetism touch control component and capacitance touching control assembly, just can realize Presentation Function and electromagnetism touch controllable function and capacitive touch function, thereby touch-control display panel has been realized the integrated of demonstration and electromagnetism touch-control and capacitance touching control, thereby reduced the cost of touch screen, thickness and weight, and multiplexing the first electrode or the second electrode are as electric capacity drive electrode, the capacitive sensing electrode structure that is positioned at first substrate outside is simple, thereby network complexity is reduced, by the more large scale that extends to of electromagnetism touch-control and the integrated touch screen of capacitance touching control, improve the signal to noise ratio (S/N ratio) of electromagnetism touch-control and the integrated touch screen of capacitance touching control.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious variations, readjust and substitute and can not depart from protection scope of the present invention.Therefore, although the present invention is described in further detail by above embodiment, the present invention is not limited only to above embodiment, in the situation that not departing from the present invention's design, can also comprise more other equivalent embodiment, and scope of the present invention is determined by appended claim scope.
Claims (15)
1. a touch screen, comprising:
The first substrate being oppositely arranged and second substrate;
A plurality of the first electrodes of arranging along first direction and a plurality of the second electrodes of arranging along second direction are all positioned at the inner surface of first substrate, or be all positioned at the inner surface of second substrate, or the first electrode is positioned at first substrate inner surface, the second electrode is positioned at second substrate inner surface; Described the first electrode and the second electrode are as electromagnetism touch-control electrode;
Be positioned at a plurality of capacitance touching control induction electrodes of described first substrate outer surface;
Wherein, multiplexing described the first electrode or the second electrode are as capacitance touching control drive electrode.
2. touch screen according to claim 1, is characterized in that, described first direction is mutually vertical with described second direction, and the bearing of trend of described capacitance touching control drive electrode is mutually vertical with the bearing of trend of described capacitance touching control induction electrode.
3. touch screen according to claim 2, is characterized in that:
Described first substrate is color membrane substrates, and described second substrate is array base palte; Described color membrane substrates comprises the black-matrix layer that is positioned at described first substrate inner side;
When a plurality of the first electrodes of arranging along first direction and a plurality of the second electrodes of arranging along second direction are all positioned at the inner surface of first substrate, described the first electrode, the second electrode and capacitance touching control drive electrode are covered in described black-matrix layer towards the one side of described array base palte.
4. touch screen according to claim 3, it is characterized in that, when a plurality of the first electrodes of arranging along first direction and a plurality of the second electrodes of arranging along second direction are all positioned at first substrate inner surface, or while being all positioned at the inner surface of second substrate, described a plurality of the first electrode and a plurality of the second electrode are positioned at the first metal layer and electrically insulated from one another, at described the first electrode and the second electrode crossing place, described the first electrode is electrically connected to by being arranged at the bridge of the second metal level; Or
Described a plurality of the first electrode and a plurality of the second electrode lay respectively at the first metal layer and the second metal level, described the first metal layer and the second metal level electrical isolation.
5. touch screen according to claim 4, is characterized in that, described the first metal layer and described the second metal level are by color filter film or organic hyaline membrane electrical isolation.
6. touch screen according to claim 4, it is characterized in that, when a plurality of the first electrodes of arranging along first direction and a plurality of the second electrodes of arranging along second direction are all positioned at first substrate inner surface, described the first metal layer is positioned at described black-matrix layer towards the one side of described array base palte, by described black-matrix layer, is blocked.
7. touch screen according to claim 1, is characterized in that, also comprises electromagnetism touch-control circuit, capacitance touching control circuit and display driver circuit, wherein:
Described electromagnetism touch-control circuit is electrically connected to described electromagnetism touch-control electrode, for receiving electromagnetic induction signal;
Described capacitance touching control circuit is electrically connected to described capacitance touching control drive electrode, for providing electric capacity to drive signal, and described capacitance touching control circuit and the electrical connection of capacitance touching control induction electrode, for receiving capacitive sensing signal;
Described display driver circuit transmits control signal to described electromagnetism touch-control circuit and described capacitance touching control circuit respectively, to determine the time point that carries out electromagnetism touch-control or capacitance touching control.
8. touch screen according to claim 1, is characterized in that, also comprises electromagnetism touch-control circuit, capacitance touching control circuit and display driver circuit, wherein:
Described electromagnetism touch-control circuit is electrically connected to described electromagnetism touch-control electrode, for receiving electromagnetic induction signal;
Described display driver circuit is electrically connected to described capacitance touching control drive electrode, for providing electric capacity to drive signal;
Described capacitance touching control circuit is electrically connected to described capacitance touching control induction electrode, for receiving capacitive sensing signal;
Described display driver circuit transmits control signal to described electromagnetism touch-control circuit and described capacitance touching control circuit respectively, to determine the time point that carries out electromagnetism touch-control or capacitance touching control.
9. touch screen according to claim 1, is characterized in that, also comprises electromagnetism touch-control circuit, capacitance touching control circuit and display driver circuit, wherein:
Described electromagnetism touch-control circuit is electrically connected to described electromagnetism touch-control electrode, for receiving electromagnetic induction signal, and described electromagnetism touch-control circuit and the electrical connection of described capacitance touching control drive electrode, for providing electric capacity to drive signal;
Described capacitance touching control circuit is electrically connected to described capacitance touching control induction electrode, for receiving capacitive sensing signal;
Described display driver circuit transmits control signal to described electromagnetism touch-control circuit and described capacitance touching control circuit respectively, to determine the time point that carries out electromagnetism touch-control or capacitance touching control.
10. according to the touch screen described in claim 7 or 8 or 9, it is characterized in that:
Described electromagnetism touch-control circuit is connected with the two ends of described electromagnetism touch-control electrode.
11. according to the touch screen described in claim 7 or 8 or 9, it is characterized in that the demonstration of described touch screen and capacitance touching control time-sharing work; The demonstration of described touch screen and electromagnetism touch-control time-sharing work; The electromagnetism touch-control of described touch screen and capacitance touching control time-sharing work.
The driving method of 12. 1 kinds of touch screens, is characterized in that, described touch screen is the arbitrary described touch screen of claim 1-11, and described driving method comprises:
From described electromagnetism touch-control electrode, gather electromagnetic induction signal, to realize electromagnetism touch controllable function;
To described capacitance touching control drive electrode, provide electric capacity to drive signal;
Adopt capacitance touching control circuit to gather capacitive sensing signal from described capacitance touching control induction electrode, to realize capacitive touch function;
Wherein, described display driver circuit transmits control signal to described electromagnetism touch-control circuit and capacitance touching control circuit, to determine the time point that carries out electromagnetism touch-control or capacitance touching control.
The driving method of 13. touch screens according to claim 12, is characterized in that, the driving method of described touch screen also comprises:
To described electromagnetism touch-control electrode, provide Electromagnetic Drive signal.
The driving method of 14. touch screens according to claim 12, is characterized in that, described capacitance touching control drives signal to be provided by electromagnetism touch-control circuit, or is provided by capacitance touching control circuit, or is provided by display driver circuit.
The driving method of 15. touch screens according to claim 12, is characterized in that, the demonstration of described touch screen and capacitance touching control time-sharing work; And the demonstration of described touch screen and electromagnetism touch-control time-sharing work; The electromagnetism touch-control of described touch screen and capacitance touching control time-sharing work.
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| CN104216592B (en) | 2017-12-26 |
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