CN204028862U - Touch panel and display device - Google Patents
Touch panel and display device Download PDFInfo
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- CN204028862U CN204028862U CN201420319740.7U CN201420319740U CN204028862U CN 204028862 U CN204028862 U CN 204028862U CN 201420319740 U CN201420319740 U CN 201420319740U CN 204028862 U CN204028862 U CN 204028862U
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Abstract
The utility model provides a kind of touch panel, comprise touch control unit, multiple drive electrode and multiple induction electrode, multiple drive electrode and multiple induction electrode are all electrically connected with touch control unit, touch control unit provides drive singal to each drive electrode, touch control unit can also provide induced signal to each induction electrode, between described drive electrode and described induction electrode, insulation is arranged, many drive electrode extends along identical direction with many induction electrodes, on the direction extended along drive electrode, on drive electrode, diverse location place resistance is different, induction electrode can export induced signal to touch control unit.The utility model also provides a kind of display device comprising touch panel.Because drive electrode and induction electrode extend all in the same direction, the extension line of drive electrode and induction electrode is all positioned at same, thus is conducive to the narrow frame display of the display panel realizing comprising touch panel.
Description
Technical field
The utility model relates to touch-screen field, particularly, relates to a kind of touch panel and a kind of display device comprising this touch panel.
Background technology
Touch-screen inputs medium as one, compared to keyboard and mouse, for user provides better convenience.Realize principle according to different, touch-screen can be divided into resistance-type, condenser type, surface acoustic wave type, infrared type etc.What be widely used at present is resistance-type and capacitance-type touch screen technology.
Mutual capacitance type touch screen, the advantage of the sensitivity higher by means of it and the true touch-control of multiple spot, is more and more pursued.Shown in Fig. 1 is a kind of schematic diagram of common mutual capacitance type touch screen, as shown in Figure 1, mutual capacitance type touch screen comprises many drive wires extended along the y-axis direction (being electrically connected with source driving signal 101) and many detection lines extended along the x-axis direction (being electrically connected with testing circuit 106).
The ultimate principle of the mutual capacitance type touch screen shown in Fig. 1 is: at drive wire side making alive, in detectable signal line side change in detection signal.Drive wire determines that x is to coordinate, and detection line determines that y is to coordinate.When detecting, line by line scan to drive wire to x, when scanning each row drive wire, all read the signal on every bar detection line, the scanning taken turns by one, just can scan the intersection point of each ranks, scans x*y signal altogether.This detection mode can be concrete the coordinate of determination multiple spot, therefore can realize multiple point touching.
Shown in Fig. 2 is the equivalent circuit diagram of the mutual capacitance type touch screen shown in Fig. 1.Source driving signal 101 provides electric signal for drive wire, drive wire exists drive wire resistance 103, forms mutual capacitance 102 between drive wire and detection line, and the stray capacitance 104 of drive wire, detection line and public electrode interlayer detection line exists detection line resistance 105.Detection line is connected with testing circuit 106.When described in finger touch during mutual capacitance type touch screen, some electric current flows into finger, and the mutual capacitance be equivalent between drive wire and the line of induction changes, and detects the weak current caused thus change in test side.
As shown in FIG., drive wire and detection line extend with x direction respectively in the y-direction, result in drive wire and first draw in the both sides of display panel respectively with detection, thus be unfavorable for the narrow frame realizing display panel.
Therefore, the narrow frame comprising the display panel of mutual capacitance type touch screen as realized changes into as this area technical matters urgently to be resolved hurrily.
Utility model content
The purpose of this utility model is to provide a kind of touch panel, a kind of display device comprising this touch panel.The display device comprising described touch panel has narrower frame.
To achieve these goals, as an aspect of the present utility model, a kind of touch panel is provided, this touch panel comprises touch control unit, multiple drive electrode and multiple induction electrode, multiple described drive electrode and multiple described induction electrode are all electrically connected with described touch control unit, described touch control unit provides drive singal to each described drive electrode, wherein, described drive electrode and the insulation of described induction electrode are arranged, and many described drive electrodes extend along identical direction with many described induction electrodes, on the direction extended along described drive electrode, on described drive electrode, diverse location place resistance is different, described induction electrode can export induced signal to described touch control unit.
Alternatively, described touch panel also comprises drive singal cabling, and multiple described drive electrode is connected to the drive singal output terminal of described touch control unit by drive singal cabling described in same.
Alternatively, described drive electrode and described induction electrode are made by transparent electrode material.
Alternatively, described drive electrode and described induction electrode are arranged on different layers.
Alternatively, the width of described drive electrode is between 3mm to 7mm.
Alternatively, described touch panel also comprises signal amplification unit, and this signal amplification unit is connected between described induction electrode and described touch control unit, to amplify the induced signal that described induction electrode exports.
As another aspect of the present utility model, provide a kind of display device, this display device comprises above-mentioned touch panel provided by the utility model.
Because drive electrode and induction electrode extend all in the same direction, therefore, the extension line of drive electrode and induction electrode is all positioned at same, thus is conducive to the narrow frame display of the display panel realizing comprising described touch panel.And touch panel provided by the utility model can embed in display panel, reduce the integral thickness of display panel.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for instructions, is used from explanation the utility model, but does not form restriction of the present utility model with embodiment one below.In the accompanying drawings:
Fig. 1 is the schematic diagram of mutual capacitance type touch screen;
Fig. 2 is the equivalent circuit diagram of the mutual capacitance type touch screen shown in Fig. 1;
Fig. 3 is the schematic diagram of touch panel provided by the utility model;
Fig. 4 is the equivalent circuit diagram of the touch panel shown in Fig. 3;
Fig. 5 is in the touch panel shown in Fig. 3, at the drive end far away of the nearly drive end of drive electrode, the middle part of drive electrode and drive electrode, and the signal intensity simulation drawing before and after touching.
Description of reference numerals
10: touch control unit 20: drive electrode
30: induction electrode 40: drive singal cabling
101: source driving signal 102: mutual capacitance
103: drive wire resistance 104: stray capacitance
105: detection line resistance 106: testing circuit
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the utility model, is not limited to the utility model.
As shown in Figure 3, as an aspect of the present utility model, a kind of touch panel is provided, this touch panel comprises touch control unit 10, multiple drive electrode 20 and multiple induction electrode 30, multiple drive electrode 20 and multiple induction electrode 30 are all electrically connected with touch control unit 10, touch control unit 10 provides drive singal to multiple drive electrode 20, wherein, between drive electrode 20 and induction electrode 30, insulation is arranged, to form electric capacity between adjacent drive electrode 20 and induction electrode 30, multiple drive electrode 20 extends along identical direction with multiple induction electrode 30, on the direction extended along drive electrode 20, on this drive electrode 20, the resistance at diverse location place is different, induction electrode 30 can export induced signal to touch control unit 10.
When described touch panel applications is in display device, touch control unit 10 provides drive singal to drive electrode 20, and receives the induced signal of induction electrode 30 output.As shown in Figure 4, electric capacity can be formed between adjacent drive electrode 20 and induction electrode 30.Because drive electrode 20 and induction electrode 30 itself all exist internal resistance, that is, drive electrode 20 and induction electrode 30 are equivalent to be formed by multiple resistant series.Therefore, drive electrode 20 and induction electrode 30 are at nearly drive end (namely, near one end of touch control unit 10) electric capacity that formed is different from the electric capacity that drive electrode 20 is formed at drive end far away (that is, away from one end of touch control unit 10) with induction electrode 30.It can thus be appreciated that induced signal induction electrode 30 produced when touch point is positioned at the one end near touch control unit 10 is different from the induced signal produced when touch point is positioned at the one end away from touch control unit 10.
The drive end place far away at the nearly drive end of drive electrode, the nearly middle part of drive electrode and drive electrode is illustrated, the signal strength differences before and after touching in Fig. 5.Wherein, the longitudinal axis represents electric current, horizontal axis representing time.As can be seen from the figure, the electric current of the drive end far away of the electric current of nearly drive end of drive electrode, the electric current at the middle part of drive electrode and drive electrode is different.Therefore, on drive electrode, the electric capacity formed with induction electrode everywhere is along its length also different.
When the finger touch of operator comprises the display device of described touch panel, finger can make the electric capacity between the drive electrode 20 of touch place and induction electrode 30 convert, therefore, induced signal on induction electrode 30 can change, it is easily understood that, when touch point is positioned at the different length place of drive electrode 20, the variable quantity of the induced signal caused is different.Touch control unit can calculate the coordinate judging touch point according to the induced signal that conversion occurs.According to the difference of induced signal, can judge the coordinate of touch point in y-axis direction, the position according to the induction electrode 30 producing induced signal can judge the coordinate of touch point in x-axis direction.
Because drive electrode 20 and induction electrode 30 extend (in the embodiment shown in Fig. 3 all in the same direction, drive electrode 20 and induction electrode 30 extend all along the y-axis direction), therefore, the extension line of drive electrode 20 and induction electrode 30 is all arranged in one side (embodiment in figure 3, the extension line of drive electrode 20 and induction electrode 30 is all positioned at the bottom of display panel), thus be conducive to the narrow frame display of the display panel realizing comprising described touch panel.In addition, touch control unit 10 had both had for drive electrode 20 provides the function of drive singal, there is again the function receiving the induced signal that induction electrode 30 exports, the source driving signal 101 in background technology is equivalent to integrate with testing circuit 106, thus further reduce the volume of touch panel, be conducive to the narrow frame display of the display panel realizing comprising described touch panel.
Touch panel provided by the utility model can embed in display panel, reduces the integral thickness of display panel.Such as, multiple drive electrode 20 can be arranged on array base palte, and multiple induction electrode 30 is arranged on be oppositely arranged with array base palte on box substrate.Or drive electrode 20 and induction electrode 30 are separately positioned in the different layers of array base palte or in the different layers of color membrane substrates.
In the utility model, the restriction not special to the material making drive electrode 20 and induction electrode 30.Such as, conductive metallic material can be utilized to make drive electrode 20 and induction electrode 30.Preferably, the larger material of resistance can be adopted to make drive electrode 20 and induction electrode 30, thus drive electrode 20 can be increased in the drive singal of nearly drive end and the difference of drive electrode 20 between the signal of drive end far away, thus the coordinate of touch point can be judged more accurately.
Further, preferably, transparent electrode material (such as, ITO) can be utilized to make drive electrode 20 and induction electrode 30.Compared with common metal material, transparent electrode material has larger resistance, therefore, utilize transparent electrode material to make drive electrode 20 and induction electrode 30 and can increase drive electrode 20 in the drive singal of nearly drive end and the difference of drive electrode 20 between the signal of drive end far away, thus the coordinate of touch point can be judged more accurately.In addition, utilize transparent electrode material to make aperture opening ratio that drive electrode 20 and induction electrode 30 also can not reduce display panel.
In order to improve the integration degree of described touch panel, preferably, described touch panel can also comprise drive singal cabling 40, this drive singal cabling 40 is electrically connected with the output terminal of touch control unit 10, and multiple drive electrode 20 is electrically connected with the output terminal of touch control unit 10 by same drive singal cabling 40.
As shown in Figure 2, different induction electrodes 30 is connected with touch control unit at different interfaces, thus can judge touch point is specifically positioned on which induction electrode 30.
As noted before, between adjacent drive electrode 20 and induction electrode 30, mutual insulating interval is arranged.Therefore, as a kind of preferred implementation of the present utility model, drive electrode 20 and induction electrode 30 can be arranged in different layers.The number of induction electrode 30 can be identical with the number of drive electrode 20, that is, drive electrode 20 and induction electrode 30 one_to_one corresponding, arrange the sensitivity that can increase touch-control like this.Or drive electrode 20 and induction electrode 30 interval are arranged alternately (as shown in Figure 3), the cost the manufacturing process simplifying touch panel that can reduce touch panel are set like this.User specifically can arrange the number of induction electrode 30 and drive electrode 20 according to concrete requirement.Such as, in the occasion higher to touch-control sensitivity requirement, induction electrode 30 and drive electrode 20 can be set correspondingly; Relatively low to touch-control sensitivity requirement, need in the occasion of lower cost, drive electrode 20 and induction electrode 30 interval can be made to arrange.
Preferably, the width of drive electrode 20 between 3mm to 7mm, thus can increase the signal difference of drive electrode 20 between nearly drive end and drive end far away.
In order to more accurately judge the position of touch point, preferably, signal amplification unit can be increased between induction electrode 30 and touch control unit 10.When there being touch to produce, induction electrode 30 producing induction current, after signal amplification unit amplifies, being convenient to the coordinate that touch control unit judges touch point.
As another aspect of the present utility model, there is provided a kind of display device, this display device comprises touch panel and display panel, and this display panel comprises array base palte and to box substrate, wherein, described touch panel is above-mentioned touch panel provided by the utility model.
Those skilled in the art should be understood that, when touch panel provided by the utility model is used as the touch panel of external hanging type (that is, on-cell formula), upper substrate and infrabasal plate can also be comprised, can be arranged on infrabasal plate by drive electrode, induction electrode is arranged on upper substrate.In use, directly touch panel is arranged on the light output surface of corresponding display panel.
Certainly, the touch panel of the utility model institute decorum can also be used as the touch panel of embedded (that is, in-cell).Now, touch panel and display panel are not independently two individualities, but become one.In this case, multiple drive electrodes of described touch panel are arranged on described array base palte or described on box substrate, and multiple induction electrodes of described touch panel are arranged on described array base palte or described on box substrate.
As noted before, multiple described drive electrode can be arranged on array base palte, and multiple described induction electrode is arranged on be oppositely arranged with array base palte on box substrate.Or described drive electrode and described induction electrode are separately positioned in the different layers of array base palte, or described drive electrode and described induction electrode are separately positioned in the different layers to box substrate.
As a kind of embodiment of the present utility model, described multiple drive electrode can be arranged on described array base palte and described in the one in box substrate, and described multiple induction electrode be arranged on described array base palte and described in the another one in box substrate.
It is easily understood that can described to box substrate being arranged color rete and black matrix, make describedly to be formed as color membrane substrates to box substrate.
Comprise in the embodiment of described drive singal cabling at described touch panel, described drive singal cabling and described touch control unit all can be arranged on the cabling district of described display panel.This cabling district can be positioned at the side of described display panel, thus can realize narrow frame.
As an also aspect of the present utility model, provide a kind of display device, this display device comprises display panel, and wherein, described display panel is above-mentioned display panel provided by the utility model.Described display device can be mobile phone, panel computer etc.
In the touch panel that the utility model embodiment provides, many drive electrode extends along identical direction with many induction electrodes, can drive described touch panel according to following driving method: the signal produced by the resistance of the diverse location of drive electrode described on the bearing of trend along described drive electrode determines a coordinate of touch point, and the signal exported by induction electrode determines another coordinate of touch point.
It should be noted that, the touch control unit in the utility model embodiment is integrated with source driving signal and launches the function of drive singal and the function of testing circuit detection induction electrode output induced signal to drive electrode.
Be understandable that, the illustrative embodiments that above embodiment is only used to principle of the present utility model is described and adopts, but the utility model is not limited thereto.For those skilled in the art, when not departing from spirit of the present utility model and essence, can make various modification and improvement, these modification and improvement are also considered as protection domain of the present utility model.
Claims (7)
1. a touch panel, it is characterized in that, this touch panel comprises touch control unit, multiple drive electrode and multiple induction electrode, multiple described drive electrode and multiple described induction electrode are all electrically connected with described touch control unit, described touch control unit provides drive singal to each described drive electrode, described drive electrode and the insulation of described induction electrode are arranged, and many described drive electrodes extend along identical direction with many described induction electrodes, on the direction extended along described drive electrode, on described drive electrode, diverse location place resistance is different, described induction electrode can export induced signal to described touch control unit.
2. touch panel according to claim 1, is characterized in that, described touch panel also comprises drive singal cabling, and multiple described drive electrode is connected to the drive singal output terminal of described touch control unit by drive singal cabling described in same.
3. touch panel according to claim 1, is characterized in that, described drive electrode and described induction electrode are made by transparent electrode material.
4. touch panel as claimed in any of claims 1 to 3, is characterized in that, described drive electrode and described induction electrode are arranged on different layers.
5. touch panel as claimed in any of claims 1 to 3, is characterized in that, the width of described drive electrode is between 3mm to 7mm.
6. touch panel as claimed in any of claims 1 to 3, it is characterized in that, described touch panel also comprises signal amplification unit, and this signal amplification unit is connected between described induction electrode and described touch control unit, to amplify the induced signal that described induction electrode exports.
7. a display device, this display device comprises touch panel, it is characterized in that, described touch panel is the touch panel in claim 1 to 6 described in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420319740.7U CN204028862U (en) | 2014-06-16 | 2014-06-16 | Touch panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420319740.7U CN204028862U (en) | 2014-06-16 | 2014-06-16 | Touch panel and display device |
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| Publication Number | Publication Date |
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| CN204028862U true CN204028862U (en) | 2014-12-17 |
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| CN201420319740.7U Active CN204028862U (en) | 2014-06-16 | 2014-06-16 | Touch panel and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104077000A (en) * | 2014-06-16 | 2014-10-01 | 京东方科技集团股份有限公司 | Touch panel and driving method thereof and display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104077000A (en) * | 2014-06-16 | 2014-10-01 | 京东方科技集团股份有限公司 | Touch panel and driving method thereof and display device |
| WO2015192597A1 (en) * | 2014-06-16 | 2015-12-23 | 京东方科技集团股份有限公司 | Touch panel and driving method therefor and display device |
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