CN204028875U - Touch-control display panel and display device - Google Patents
Touch-control display panel and display device Download PDFInfo
- Publication number
- CN204028875U CN204028875U CN201420340962.7U CN201420340962U CN204028875U CN 204028875 U CN204028875 U CN 204028875U CN 201420340962 U CN201420340962 U CN 201420340962U CN 204028875 U CN204028875 U CN 204028875U
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- touch
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- display panel
- control display
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Abstract
The utility model provides a kind of touch-control display panel, this touch-control display panel comprises the multiple touch drive electrode be positioned on substrate and the multiple touch sensible electrodes arranged with the plurality of touch drive electrode mutual insulating, described touch sensible electrode is arranged in a crossed manner with touch drive electrode, wherein, described touch-control display panel also comprises guarded electrode, the projection on the substrate of described guarded electrode is between the projection of described touch drive electrode on substrate and the projection of described touch sensible electrode on substrate, and the projection on the substrate of described guarded electrode is not overlapping with the projection on the substrate of described touch drive electrode.The utility model also provides a kind of display device.Semaphore before and after described touch-control display panel touch point place touches changes greatly.
Description
Technical field
The utility model relates to touch display field, particularly, relates to a kind of touch-control display panel and a kind of display device comprising described touch-control display 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 control display panel, 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 control display panel, as shown in Figure 1, this mutual capacitance type touch control display panel comprises multiple touch drive electrode 10, for the plurality of touch drive electrode 10 provides the source driving signal 101 of drive singal, multiple touch sensible electrode 20 and detect the testing circuit 106 of the induced signal on the plurality of touch sensible electrode 20, touch between drive electrode 10 and touch sensible electrode 20 and can form electric capacity, each touch drive electrode 10 comprises multiple touch driven element electrode 100, adjacent two row touch between driven element electrode 100 and are provided with a touch sensible electrode 20.
The ultimate principle of the mutual capacitance type touch screen shown in Fig. 1 is: at touch drive electrode 10 side making alive, in touch sensible signal electrode side change in detection signal.Touch drive electrode and determine that x is to coordinate, touch sensible signal electrode determines that y is to coordinate.When detecting, x being lined by line scan to drive wire, when scanning each row drive wire, all reading the signal on every bar touch sensible signal electrode, the scanning taken turns by one, just each ranks can be scanned, scan 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 touching drive electrode, touch on drive electrode and there is drive electrode resistance 103, touch between drive electrode and touch sensible electrode and form mutual capacitance 102, touch the stray capacitance 104 of drive electrode, touch sensible electrode and public electrode interlayer, touch sensible electrode exists induction electrode resistance 105.Touch sensible electrode is connected with testing circuit 106.When described in finger touch during mutual capacitance type touch screen, some electric current flows into finger, is equivalent to the mutual capacitance touched between drive electrode and touch sensible electrode and changes, and detects the weak current caused thus change in test side.
When the position coordinates of detecting touch point, the change of the semaphore before needing the touch at detected touch point place and after touching.Before and after the place of touch point, semaphore change greatly, is then more easily detected, thus accurately can determines the position coordinates of touch point.Therefore, how to increase touch point place touch before and after semaphore change be 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-control display panel and a kind of display device, and the semaphore before and after this touch-control display panel touch point place touches changes greatly.
To achieve these goals, as an aspect of the present utility model, a kind of touch-control display panel is provided, this touch-control display panel comprises the multiple touch drive electrode be positioned on substrate and the multiple touch sensible electrodes arranged with the plurality of touch drive electrode mutual insulating, described touch sensible electrode is arranged in a crossed manner with touch drive electrode, wherein, described touch-control display panel also comprises guarded electrode, the projection on the substrate of described guarded electrode is between the projection of described touch drive electrode on substrate and the projection of described touch sensible electrode on substrate, and the projection on the substrate of described guarded electrode is not overlapping with the projection on the substrate of described touch drive electrode.
Preferably, the driving signal frequency of described touch drive electrode is for being more than or equal to 5MHz.
Preferably, described guarded electrode and described touch sensible electrode are arranged with layer.
Preferably, described guarded electrode and described touch sensible electrode are arranged in different layers, and are provided with insulation course between described guarded electrode and described touch sensible electrode.
Preferably, the projection of described guarded electrode on the substrate of described touch-control display panel is overlapping with the projection section of described touch sensible electrode on the substrate of described touch-control display panel.
Preferably, described guarded electrode is made up of transparent electrode material or metal material.
Preferably, described touch-control display panel comprises the array base palte that is oppositely arranged and to box substrate, described touch drive electrode is arranged on the array base palte of described touch-control display panel, described touch sensible electrode be arranged on described touch-control display panel on box substrate, the common electrode layer of described array base palte comprises the multiple described touch drive electrode of mutually insulated and multiple public electrode, described touch drive electrode and public electrode arranged in a crossed manner, the projection of described touch sensible electrode on described array base palte is positioned at the region at described public electrode place
The displaying time of one frame picture of described touch-control display panel comprises display stage and touch-control stage, within the described display stage, touching drive electrode described in each for transmitting common electrode signal, within the described touch-control stage, touching drive electrode described in each for transmitting drive singal.
Preferably, described guarded electrode connects common electrode signal.
As another aspect of the present utility model, provide a kind of display device, wherein, comprise above-mentioned touch-control display panel provided by the utility model.
Add guarded electrode between touch sensible electrode and touch drive electrode after, when touch-control display panel is in the touch-control stage, shielded signal is accessed in guarded electrode, the mutual tolerance that can reduce touch sensible electrode before touch control operation and touch between drive electrode, and then the semaphore before reduction touch-control on touch sensible electrode, thus, the change amount signal that testing circuit calculates can be increased, thus the position coordinates of touch point can be determined more accurately.
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 circuit diagram of existing touch-control display panel;
Fig. 2 is the schematic equivalent circuit of the touch-control display panel shown in Fig. 1;
Fig. 3 is the circuit diagram of touch-control display panel provided by the utility model;
Fig. 4 is the cross-sectional schematic of a kind of embodiment of touch-control display panel provided by the utility model;
Fig. 5 is the cross-sectional schematic of the another kind of embodiment of touch-control display panel provided by the utility model.
Description of reference numerals
10: touch drive electrode 20: touch sensible electrode
30: guarded electrode 40: public electrode
50: liquid crystal layer 60: color rete
70: black matrix 80: insulation course
100: touch driven element electrode 101: source driving signal
102: mutual capacitance 103: drive electrode resistance
104: stray capacitance 105: induction electrode resistance
106: testing circuit A: to box substrate
B: array base palte
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-control display panel is provided, this touch-control display panel comprises the multiple touch drive electrode 10 be positioned on substrate and many touch sensible electrodes 20 arranged with the plurality of touch drive electrode 10 mutual insulating, touch sensible electrode 20 is arranged in a crossed manner with touch drive electrode 10, wherein, described touch-control display panel also comprises guarded electrode 30, and guarded electrode 30 projection is on the substrate touching between the projection of drive electrode 10 on the substrate of described touch-control display panel and the projection of touch sensible electrode 20 on substrate, and guarded electrode 30 projection is on the substrate not overlapping with the projection on the substrate of touch drive electrode 10.Should be understood that, the projection of guarded electrode 30 and the projection touching drive electrode 10 should be positioned on same substrate, such as, are all positioned on array base palte, or be all positioned at array base palte to box arrange on box substrate.
In the utility model, concrete restriction is not done to the shape touching drive electrode 10, such as, as a kind of embodiment of the present utility model, as as shown in the rectangle frame that double dot dash line in Fig. 3 surrounds, each touch drive electrode 10 can comprise the multiple touch driven element electrodes 100 being arranged in a line, and the multiple touch driven element electrodes 100 in each touch drive electrode 10 are electrically connected, and intersects with touch sensible electrode 20 to make touching drive electrode 10.
In the utility model, special restriction be there is no yet to the concrete shape of guarded electrode 30.Because the projection of guarded electrode 30 on the substrate of touch-control display panel is not overlapping with the projection of touch drive electrode 10 on the substrate of touch-control display panel, and, guarded electrode 30 is touch the projection of drive electrode 10 on the substrate of touch-control display panel in the side of the projection of the substrate of touch-control display panel, guarded electrode 30 is the projection of touch sensible electrode 20 on the substrate of touch-control display panel at the opposite side of the projection of the substrate of touch-control display panel, therefore, as shown in Figure 3, the bearing of trend that guarded electrode 30 can be set to this guarded electrode 30 is identical with the bearing of trend of touch sensible electrode 20.Guarded electrode 30 can be the strip shaped electric poles parallel with touch sensible electrode 20, also can be multiple guarded electrode blocks of connecting along the bearing of trend of touch sensible electrode.
Those skilled in the art should be understood that, the display device comprising described touch-control display panel can comprise for multiple touch drive electrode 10 provides the source driving signal 101 of drive singal and the testing circuit 106 of the induced signal detected on the plurality of touch sensible electrode 20, and, arrange because touch drive electrode 10 and touch sensible electrode 20 insulate, therefore, touch between drive electrode 10 and touch sensible electrode 20 and can form electric capacity.
When carrying out touch control operation to touch-control display panel, shielded signal can be accessed to guarded electrode 30.As shown in Figure 3, the touch driven element electrode 100 touching drive electrode 10 is adjacent with touch sensible electrode 20 level, and therefore, the electric field in the electric capacity formed between touch drive electrode 10 and touch sensible electrode 20 is mainly the electric field of horizontal direction.When the finger touch display panel of operator, have one part of current and flow into finger, be equivalent to the mutual capacitance touched between drive electrode 10 and touch sensible electrode 20 and change, testing circuit 106 can detect the weak current change caused thus.
Touch-control display panel provided by the utility model is particularly useful for the touch-control display panel of high-frequency drive, that is, the driving signal frequency of described touch drive electrode is for being more than or equal to 5MHz.
The front and back of touch control operation are occurring, and the semaphore on touch sensible electrode 20 changes from small to big.The change amount signal Δ S that testing circuit 106 calculates is the semaphore S before touch-control on touch sensible electrode 20
1deduct the semaphore S on touch sensible electrode 20 after touch-control
2absolute value, that is, Δ S=|S
1-S
2|.
As long as the contact area ensureing finger and touch between drive electrode 10 and touch sensible electrode 20, the semaphore S after touch-control on touch sensible electrode 20
2can remain unchanged, and the semaphore S before touch-control on touch sensible electrode 20
1be subject to the impact of the mutual tolerance between touch sensible electrode 20 and touch drive electrode 10.If touch sensible electrode 20 and the mutual tolerance that touches between drive electrode 10 before reduction touch-control, then can reduce the semaphore S on touch sensible electrode 20 before touch-control
1.Add guarded electrode 30 between touch sensible electrode 20 and touch drive electrode 10 after, when touch-control display panel is in the touch-control stage, shielded signal is accessed in guarded electrode 30, the mutual tolerance that can reduce touch sensible electrode 20 before touch control operation and touch between drive electrode 10, and then reduce the semaphore S before touch-control on touch sensible electrode 20
1, thus, the change amount signal Δ S that testing circuit 106 calculates can be increased, thus the position coordinates of touch point can be determined more accurately.
One skilled in the art will appreciate that touch sensible electrode 20 is except being connected with testing circuit 106, is also connected with touching signals source, the setting in this touching signals source is known in the field, repeats no more here.
In touch-control display panel provided by the utility model, the requirement not special to the concrete setting position touching drive electrode 10 and touch sensible electrode 20, such as, touch drive electrode 10 and can be arranged on same layer with touch sensible electrode 20, in this case, described touch-control display panel can also comprise connecting line, this connecting line is arranged on different layers with the touch driven element electrode 100 touching drive electrode 10, and be connected with touch driven element electrode 100 by via hole, be electrically connected to make the touch driven element electrode 100 in a line, and connecting line is connected with source driving signal, think that touching drive electrode 10 provides touch drive singal.
Or, as shown in Figure 3 and Figure 5, touch drive electrode 10 and can be arranged on different layers with touch sensible electrode 20.
In the utility model, to the concrete shape of guarded electrode 30 and the special restriction of set-up mode, as long as guarded electrode 30 can be arranged in the level interval between touch driven element electrode 100 and touch sensible electrode 20 touching drive electrode 10, and reduce to touch the mutual tolerance between drive electrode 10 and touch sensible electrode 20.Such as, the strip that each guarded electrode 30 can be formed for the guarded electrode block of series connection also can be the strip similar to touch sensible electrode 20.
In the utility model, also do not have special restriction to the set-up mode of guarded electrode 30, such as, as shown in Figure 4, guarded electrode 30 can be arranged with layer with touch sensible electrode 20.In this case, the bearing of trend of guarded electrode 30 is identical with the bearing of trend of touch sensible electrode 20, and preferably, the length of guarded electrode 30 is also identical with the length of touch sensible electrode 20.
Or as shown in Figure 5, guarded electrode 30 and touch sensible electrode 20 are arranged in different layers.In this case, preferably, insulation course 80 is provided with between guarded electrode 30 and touch sensible electrode 20.
When guarded electrode 30 and touch sensible electrode 20 are arranged in different layers, shield effectiveness must be reached in order to better, preferably, the projection of guarded electrode 30 on the substrate of described touch-control display panel and the projection of touch sensible electrode 20 on the substrate of described touch-control display panel can partly overlap, but must not have overlapping with touch drive electrode, the projection of guarded electrode 30 on the substrate of described touch-control display panel is overlapping with the projection section of touch sensible electrode 20 on the substrate of described touch-control display panel better can must stop that touching drive electrode 10 projects to the line of electric force of touch sensible electrode 20 in screen, thus play better shield effectiveness.
Touch-control display panel provided by the utility model can be display panels, described touch-control display panel comprise array base palte B and this array base palte B to box arrange to box substrate A and be arranged on array base palte B and to the liquid crystal layer 50 between box substrate A.Correspondingly, can by touch drive electrode 10 be arranged on the array base palte B of described touch-control display panel, touch sensible electrode 20 is arranged on described touch-control display panel on box substrate A.It can thus be appreciated that touch-control display panel provided by the utility model is embedded (in-cell) touch-control display panel, has higher integrated level and less thickness, meets the request for utilization of user.
Preferably, the common electrode layer of array base palte B comprises multiple touch drive electrode 10 and multiple public electrode 40 (being meant to herein of mutually insulated, touch drive electrode and public electrode mutual insulating), touch drive electrode 10 arranged in a crossed manner with public electrode 40, the projection of touch sensible electrode 20 on array base palte B is positioned at the region at public electrode 40 place.As a kind of embodiment of the present utility model, the shape touching drive electrode 10 and the projection of touch sensible electrode 20 on array base palte B can be identical with the shape touching drive electrode 10 and the projection of public electrode 40 on array base palte B.
In embodiment shown in Fig. 3 to Fig. 5, touch drive electrode 10 to arrange with layer with the public electrode 40 of touch-control display panel, and row touch drive electrode 10 row and (namely public electrode interval is arranged, one row touch-control drive electrode is set between adjacent two public electrodes, or adjacent two row touch between drive electrode and arrange a public electrode 40), correspondingly, the projection of touch sensible electrode 20 on described array base palte is positioned at the region at described public electrode place.
Preferably, the displaying time of one frame picture of described touch-control display panel comprises display stage and touch-control stage, within the described display stage, each touches drive electrode 10 for transmitting common electrode signal, within the described touch-control stage, drive electrode is touched for transmitting drive singal (that is, source driving signal 101 provide drive singal) described in each.Within the display stage, utilization touch drive electrode transmission common electrode signal can increase the electric field intensity between the pixel electrode layer (comprising multiple pixel electrode) of display panel and common electrode layer, be conducive to the upset of liquid crystal molecule, thus owing to improving the display quality of display panel.
In order to improve the aperture opening ratio of described touch control display panel, preferably, transparent electrode material (such as, ITO) can be utilized to make guarded electrode 30.Certainly, the utility model is not limited to this, and metal material also can be utilized to make guarded electrode.
As noted before, within the touch-control cycle, in guarded electrode 30, access shielded signal, shielded signal can ground connection also can be a fixed voltage signal.In the utility model, to the restriction providing the concrete device of shielded signal not special, such as, in order to simplify the structure of touch-control display panel, preferably, the shielded signal of access guarded electrode 30 is can common electrode signal.
The displaying time of one frame picture of described touch-control display panel comprises display stage and touch-control stage, within the described touch-control stage, and described guarded electrode access common electrode signal.
As described above, touch-control display panel provided by the utility model is embedded display panels, therefore, in order to avoid impacting the deflection of the liquid crystal molecule in touch-control display panel, preferably, within the display stage, described guarded electrode is floating, does not access any signal.
As shown in Figures 4 and 5, described touch-control display panel to box substrate A being provided with color rete 60 and black matrix 70, the set-up mode of color rete 60 and black matrix 70 is well known in the art, repeats no more here.As noted before, on array base palte B, touch drive electrode 10 touch driven element electrode 100 can and public electrode 40 interval arrange.
As another aspect of the present utility model, also provide a kind of display device, wherein, this display device comprises above-mentioned touch-control display panel provided by the utility model.
Display device provided by the utility model can be mobile phone, panel computer etc.Add guarded electrode between touch sensible electrode and touch drive electrode after, when touch-control display panel is in the touch-control stage, shielded signal is accessed in guarded electrode, the mutual tolerance that can reduce touch sensible electrode before touch control operation and touch between drive electrode, and then the semaphore before reduction touch-control on touch sensible electrode, thus, the change amount signal that testing circuit calculates can be increased, thus the position coordinates of touch point can be determined more accurately.
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 (9)
1. a touch-control display panel, this touch-control display panel comprises the multiple touch drive electrode be positioned on substrate and the multiple touch sensible electrodes arranged with the plurality of touch drive electrode mutual insulating, described touch sensible electrode is arranged in a crossed manner with touch drive electrode, it is characterized in that, described touch-control display panel also comprises guarded electrode, the projection on the substrate of described guarded electrode is between the projection of described touch drive electrode on substrate and the projection of described touch sensible electrode on substrate, and the projection on the substrate of described guarded electrode is not overlapping with the projection on the substrate of described touch drive electrode.
2. touch-control display panel according to claim 1, is characterized in that, the driving signal frequency of described touch drive electrode is for being more than or equal to 5MHz.
3. touch-control display panel according to claim 2, is characterized in that, described guarded electrode and described touch sensible electrode are arranged with layer.
4. touch-control display panel according to claim 2, is characterized in that, described guarded electrode and described touch sensible electrode are arranged in different layers, and are provided with insulation course between described guarded electrode and described touch sensible electrode.
5. touch-control display panel according to claim 4, is characterized in that, the projection of described guarded electrode on the substrate of described touch-control display panel is overlapping with the projection section of described touch sensible electrode on the substrate of described touch-control display panel.
6. touch-control display panel as claimed in any of claims 1 to 5, is characterized in that, described guarded electrode is made up of transparent electrode material or metal material.
7. according to the touch-control display panel in claim 6 described in any one, it is characterized in that, described touch-control display panel comprises the array base palte that is oppositely arranged and to box substrate, described touch drive electrode is arranged on the array base palte of described touch-control display panel, described touch sensible electrode be arranged on described touch-control display panel on box substrate, the common electrode layer of described array base palte comprises the multiple described touch drive electrode of mutually insulated and multiple public electrode, described touch drive electrode and public electrode arranged in a crossed manner, the projection of described touch sensible electrode on described array base palte is positioned at the region at described public electrode place,
The displaying time of one frame picture of described touch-control display panel comprises display stage and touch-control stage, within the described display stage, touching drive electrode described in each for transmitting common electrode signal, within the described touch-control stage, touching drive electrode described in each for transmitting drive singal.
8. according to the touch-control display panel in claim 7 described in any one, it is characterized in that, described guarded electrode connects common electrode signal.
9. a display device, is characterized in that, comprises touch-control display panel as claimed in any of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420340962.7U CN204028875U (en) | 2014-06-24 | 2014-06-24 | Touch-control display panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420340962.7U CN204028875U (en) | 2014-06-24 | 2014-06-24 | Touch-control display panel and display device |
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| Publication Number | Publication Date |
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| CN204028875U true CN204028875U (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420340962.7U Expired - Fee Related CN204028875U (en) | 2014-06-24 | 2014-06-24 | Touch-control display panel and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015196712A1 (en) * | 2014-06-24 | 2015-12-30 | 京东方科技集团股份有限公司 | Touch display panel and display device |
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- 2014-06-24 CN CN201420340962.7U patent/CN204028875U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015196712A1 (en) * | 2014-06-24 | 2015-12-30 | 京东方科技集团股份有限公司 | Touch display panel and display device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 |