CN205121513U - In cell touch panel and display device - Google Patents
In cell touch panel and display device Download PDFInfo
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- CN205121513U CN205121513U CN201520835411.2U CN201520835411U CN205121513U CN 205121513 U CN205121513 U CN 205121513U CN 201520835411 U CN201520835411 U CN 201520835411U CN 205121513 U CN205121513 U CN 205121513U
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Abstract
The utility model discloses an in cell touch panel and display device through increasing pressure detection electrode between negative pole layer at organic electroluminescence pixel and the opposite direction substrate, makes pressure detection electrode and the laminiform one -tenth electric capacity structure of negative pole, when pressure detection electrode position was pressed, the distance between pressure detection electrode and the negative pole layer changed and brings the change of electric capacity between the two thereupon, consequently, increased the pressure and detected the chip, applyed the pressure detected signal in the pressure touch -control stage to pressure detection electrode to the pressure that determines the touch -control position through the change that detects the capacitance value between pressure detection electrode and the negative pole layer is big or small, can realize pressure touch -control function. And on multiplexing negative pole layer of pressure touch -control stage to integrate pressure detection electrode inside the touch -sensitive screen, it is less to display device's structural design change, can not receive the restriction of assembly tolerance, be favorable to realizing better detection precision, and be favorable to sparingly cost of manufacture.
Description
Technical field
The utility model relates to display technique field, particularly a kind of In-cell touch panel and display device.
Background technology
The fields such as pressure sensitive technology refers to the technology can implementing detection to external force, and this technology is just used in industry control for a long time, medical treatment.At present, the mode realizing pressure sensitive in display field especially mobile phone or dull and stereotyped field increases extra mechanism to realize in the backlight portion of display panels or the midframe part of mobile phone, this design needs to make change to the structural design of display panels or mobile phone, and due to build-up tolerance comparatively large, the detection accuracy of this design is also restricted.
Therefore, how to realize the higher pressure sensitive of detection accuracy when display panel hardware modifications is less, be the problem that those skilled in the art need solution badly.
Utility model content
The utility model embodiment provides a kind of In-cell touch panel and display device, by pressure sensitivity detecting electrode is integrated in touch-screen inside, achieves the pressure sensitivity touch controllable function of better detection accuracy, reduces the complexity of build-up tolerance and technological process.
Therefore, the utility model embodiment provides a kind of In-cell touch panel, comprise: underlay substrate, the subtend substrate be oppositely arranged with described underlay substrate and be positioned at the multiple organic electroluminescent pixel unit that in matrix arrange of described underlay substrate towards described subtend substrate side, wherein each described organic electroluminescent pixel unit comprises the anode layer, luminescent layer and the cathode layer that are positioned at successively on described underlay substrate; Also comprise:
Pressure sensitivity detection chip and the multiple separate pressure sensitivity detecting electrode between described cathode layer and described subtend substrate; Wherein,
Described pressure sensitivity detecting electrode and described cathode layer form capacitance structure;
Described pressure sensitivity detection chip is used for applying pressure sensitivity detection signal in the pressure sensitivity touch-control stage to described pressure sensitivity detecting electrode, and is judged the pressure size of position of touch by the change detecting the capacitance between described pressure sensitivity detecting electrode and described cathode layer.
Preferably, in the above-mentioned In-cell touch panel that the utility model embodiment provides, described pressure sensitivity detecting electrode is multiplexed with self-capacitance electrode;
Described pressure sensitivity detection chip also for applying capacitance detecting signal in the capacitance touching control stage to described pressure sensitivity detecting electrode, and determines position of touch by the change of the capacitance detecting described pressure sensitivity detecting electrode.
Preferably, in the above-mentioned In-cell touch panel that the utility model embodiment provides, each described pressure sensitivity detecting electrode is arranged with layer.
Preferably, in the above-mentioned In-cell touch panel that the utility model embodiment provides, the material of each described pressure sensitivity detecting electrode is transparent conductive material, and described pressure sensitivity detecting electrode covers at least one organic electroluminescent pixel unit in the orthogonal projection of underlay substrate.
Preferably, in the above-mentioned In-cell touch panel that the utility model embodiment provides, also comprise: the black matrix layer between described underlay substrate and described subtend substrate;
Gap between each described pressure sensitivity detecting electrode is positioned at the region of described black matrix layer at the orthogonal projection place of described underlay substrate in the orthogonal projection of described underlay substrate.
Preferably, in the above-mentioned In-cell touch panel that the utility model embodiment provides, also comprise: the black matrix layer between described underlay substrate and described subtend substrate;
The material of each described pressure sensitivity detecting electrode is metal material, and the figure of each described pressure sensitivity detecting electrode is the fenestral fabric being positioned at the figure region of described black matrix layer in the orthogonal projection of described underlay substrate.
Preferably, in the above-mentioned In-cell touch panel that the utility model embodiment provides, along the direction in the points toward edge region, central area of described underlay substrate, the area occupied of each described pressure sensitivity detecting electrode region on described underlay substrate becomes large gradually.
Preferably, in the above-mentioned In-cell touch panel that the utility model embodiment provides, also comprise: with each described pressure sensitivity detecting electrode wire one to one, and with each described pressure sensitivity detecting electrode conducting tie point one to one; Wherein,
Each described wire is positioned at the region of described black matrix layer at the orthogonal projection place of described underlay substrate in the orthogonal projection of described underlay substrate, and each described conducting tie point is positioned at the neighboring area of described In-cell touch panel around viewing area;
After each described pressure sensitivity detecting electrode is connected with described conducting tie point by described wire, by with described conducting tie point one to one and be positioned at the metal routing of described neighboring area and described pressure sensitivity detection chip is electrically connected.
Preferably, in the above-mentioned In-cell touch panel that the utility model embodiment provides, described neighboring area has four sides, and described conducting tie point all has distribution at each side of described neighboring area; And the conducting tie point corresponding with each described pressure sensitivity detecting electrode is distributed in the side edge of the neighboring area nearest with described pressure sensitivity detecting electrode.
Correspondingly, the utility model embodiment also provides a kind of display device, comprises any one In-cell touch panel above-mentioned that the utility model embodiment provides.
The In-cell touch panel that the utility model embodiment provides and display device, by increasing pressure sensitivity detecting electrode between the cathode layer and subtend substrate of organic electroluminescent pixel unit, make pressure sensitivity detecting electrode and cathode layer form capacitance structure; When pressure sensitivity detecting electrode position is pressed, distance between pressure sensitivity detecting electrode and cathode layer changes and brings the change of electric capacity between the two thereupon, therefore, increase pressure sensitivity detection chip, in the pressure sensitivity touch-control stage, pressure sensitivity detection signal is applied to pressure sensitivity detecting electrode, and the pressure size of position of touch is judged by the change detecting the capacitance between pressure sensitivity detecting electrode and cathode layer, pressure sensitivity touch controllable function can be realized.And the above-mentioned In-cell touch panel that the utility model embodiment provides is at pressure sensitivity touch-control stage multiplexing cathode layer, and pressure sensitivity detecting electrode is integrated in touch-screen inside, less to the structural design change of display device, the restriction of build-up tolerance can not be subject to, be conducive to realizing better detection accuracy, and be conducive to saving cost of manufacture.
Accompanying drawing explanation
The structural representation of the In-cell touch panel that Fig. 1 provides for the utility model embodiment;
The duration of charging of pressure sensitivity detecting electrode in the In-cell touch panel that Fig. 2 provides for the utility model embodiment and the coordinate diagram of the relation of voltage;
One of distribution schematic diagram of conducting tie point in the In-cell touch panel that Fig. 3 a provides for the utility model embodiment;
The distribution schematic diagram two of the conducting tie point in the In-cell touch panel that Fig. 3 b provides for the utility model embodiment;
The schematic flow sheet of the driving method of the In-cell touch panel that Fig. 4 provides for the utility model embodiment;
The driver' s timing schematic diagram of the In-cell touch panel that Fig. 5 provides for the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, the In-cell touch panel provide the utility model embodiment and the embodiment of display device are described in detail.
In accompanying drawing, the thickness of each rete and shape do not reflect actual proportions, and object just signal illustrates the utility model content.
The utility model embodiment provides a kind of In-cell touch panel, as shown in Figure 1, comprise: underlay substrate 100, the subtend substrate 200 be oppositely arranged with underlay substrate 100 and be positioned at the multiple organic electroluminescent pixel unit 110 that in matrix arranges of underlay substrate 100 towards subtend substrate 200 side, wherein each organic electroluminescent pixel unit 110 comprises the anode layer 111 be positioned at successively on underlay substrate, luminescent layer 112 and cathode layer 113; Also comprise:
Pressure sensitivity detection chip (not shown in figure 1) and the multiple separate pressure sensitivity detecting electrode 300 between cathode layer 113 and subtend substrate 200; Wherein,
Pressure sensitivity detecting electrode 300 and cathode layer 113 form capacitance structure;
Pressure sensitivity detection chip is used for applying pressure sensitivity detection signal in the pressure sensitivity touch-control stage to pressure sensitivity detecting electrode 300, and judges the pressure size of position of touch by the change detecting the capacitance between pressure sensitivity detecting electrode 300 and cathode layer 113.
The above-mentioned In-cell touch panel that the utility model embodiment provides, by increasing pressure sensitivity detecting electrode between the cathode layer and subtend substrate of organic electroluminescent pixel unit, makes pressure sensitivity detecting electrode and cathode layer form capacitance structure; When pressure sensitivity detecting electrode position is pressed, distance between pressure sensitivity detecting electrode and cathode layer changes and brings the change of electric capacity between the two thereupon, therefore, increase pressure sensitivity detection chip, in the pressure sensitivity touch-control stage, pressure sensitivity detection signal is applied to pressure sensitivity detecting electrode, and the pressure size of position of touch is judged by the change detecting the capacitance between pressure sensitivity detecting electrode and cathode layer, pressure sensitivity touch controllable function can be realized.And the above-mentioned In-cell touch panel that the utility model embodiment provides is at pressure sensitivity touch-control stage multiplexing cathode layer, and pressure sensitivity detecting electrode is integrated in touch-screen inside, less to the structural design change of display device, the restriction of build-up tolerance can not be subject to, be conducive to realizing better detection accuracy, and be conducive to saving cost of manufacture.
It should be noted that, in the above-mentioned In-cell touch panel that the utility model embodiment provides, organic electroluminescent pixel unit is top emission type, and namely organic electroluminescent pixel unit issued light is by the outgoing of cathode layer side.
Particularly, in the above-mentioned In-cell touch panel that the utility model embodiment provides, as shown in Figure 1, the spacing formed between each pressure sensitivity detecting electrode 300 of capacitance structure and cathode layer 113 is d, according to capacitance equation: C=ε S/4 π kd, wherein, C is the electric capacity of the capacitance structure that pressure sensitivity detecting electrode 300 is formed with cathode layer 113, ε is the specific inductive capacity of the insulation electrolytic matter being in spacing d place, S is that the right opposite of the capacitance structure that pressure sensitivity detecting electrode 300 is formed with conductive layer 400 amasss, k is electrostatic force constant, d is the spacing between pressure sensitivity detecting electrode 300 and conductive layer 400.When pressure sensitivity detecting electrode 300 position is pressed, spacing d will reduce, and the electric capacity formed between such pressure sensitivity detecting electrode 300 and cathode layer 113 will increase, and the change therefore by detecting this capacitance just can determine the size of pressure.
Further, charge formula according to electric capacity: Vt=V0+ (Vu-V0) * [1-exp (-t/RC)], wherein, Vt is the magnitude of voltage on random time t electric capacity, V0 is the initial voltage value on electric capacity, Vu is that electric capacity is full of rear final voltage value, and RC is the time constant of RC circuit.The capacitance structure that pressure sensitivity detection chip can be formed according to pressure sensitivity detecting electrode and cathode layer, under different touch-control pressure, the capacitance of capacitance structure is different, cause the duration of charging of capacitance structure different, the change of Detection capacitance is carried out, to determine the size of pressure by the difference detecting the duration of charging.Particularly, at pressure sensitivity detection-phase, pressure sensitivity detection chip applies pressure sensitivity detection signal to pressure sensitivity detecting electrode, the capacitance structure that pressure sensitivity detecting electrode and cathode layer are formed produces coupling capacitance, due to the RC delayed-action of signal, as shown in Figure 2, wherein horizontal axis representing time t, the longitudinal axis represents the voltage V at capacitance structure two ends, suppose that the duration of charging of the capacitance structure when oncontacting governor pressure is T1, so when there being touch-control pressure, distance between pressure sensitivity detecting electrode and cathode layer just diminishes, thus make the capacitance C of capacitance structure become large, the corresponding duration of charging will elongatedly be T2, therefore pressure sensitivity detection chip can carry out the pressure size of indirect feedback position of touch by the change in the duration of charging detecting the capacitance structure that pressure sensitivity detecting electrode and cathode layer be formed, thus make In-cell touch panel realize pressure sensitivity touch controllable function.
Particularly, in the above-mentioned In-cell touch panel that the utility model embodiment provides, in order to reduce the mutual interference in display stage and pressure sensitivity touch-control stage, the mode that general employing display stage and the stage timesharing of pressure sensitivity touch-control drive, and, the display driver chip of display and pressure sensitivity detection chip can also be integrated into a chip in the specific implementation, production cost can be reduced further like this.
Further, in the specific implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, each pressure sensitivity detecting electrode specifically can be arranged on the side of underlay substrate towards subtend substrate, also the side of subtend real estate to underlay substrate can be arranged on, in this no limit.Be arranged on underlay substrate 100 for each pressure sensitivity detecting electrode 300 to be described towards the side of subtend substrate 200 in Fig. 1.
Particularly, in the above-mentioned In-cell touch panel that the utility model embodiment provides, when each pressure sensitivity detecting electrode is arranged on underlay substrate towards the side of subtend substrate, in order to make pressure sensitivity detecting electrode and cathode layer form capacitance structure, generally between pressure sensitivity detecting electrode and cathode layer, be also provided with insulation course; When each pressure sensitivity detecting electrode is arranged on subtend real estate to the side of underlay substrate, air can be adopted as dielectric layer between each pressure sensitivity detecting electrode and cathode layer, certainly in order to play the effect supporting subtend substrate, also insulation course can be set between each pressure sensitivity detecting electrode and cathode layer.
Further, in the specific implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, as shown in Figure 1, pressure sensitivity detecting electrode 300 can be multiplexed with self-capacitance electrode, pressure sensitivity detection chip also for applying capacitance detecting signal in the capacitance touching control stage to pressure sensitivity detecting electrode 300, and determines position of touch by the change of the capacitance detecting pressure sensitivity detecting electrode 300, thus makes In-cell touch panel realize capacitive touch function.Such employing pressure sensitivity detecting electrode is multiplexed with self-capacitance electrode, and not needing increases the extra technique preparing self-capacitance electrode, can save production cost, enhance productivity.
Due to pressure sensitivity detecting electrode is multiplexed with again self-capacitance electrode, achieve capacitive touch function, in order to reduce the mutual interference of display stage, signal between capacitance touching control stage and pressure sensitivity touch-control stage, in the specific implementation, need the mode adopting display stage, capacitance touching control stage and the stage timesharing of pressure sensitivity touch-control to drive, and provide capacitance detecting signal and pressure sensitivity detection signal in capacitance touching control stage and pressure sensitivity touch-control stage to pressure sensitivity detecting electrode respectively by pressure sensitivity detection chip.
Further, in the specific implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, as shown in Figure 1, each pressure sensitivity detecting electrode 300 is arranged with layer.Like this, only need the figure that can be formed each pressure sensitivity detecting electrode 300 by patterning processes in the preparation, can preparation technology be simplified, save production cost, enhance productivity, certainly in the specific implementation, also different for each pressure sensitivity detecting electrode layer can be arranged, in this no limit.
Further, in the specific implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, the material of each pressure sensitivity detecting electrode can be transparent conductive material, such as, can be tin indium oxide (ITO) material, indium zinc oxide (IZO) material, carbon nano-tube or Graphene etc.; Also can be metal material, in this no limit.
In the above-mentioned In-cell touch panel that the utility model embodiment provides, when the material of each pressure sensitivity detecting electrode is transparent conductive material, each pressure sensitivity detecting electrode covers at least one organic electroluminescent pixel unit in the orthogonal projection of underlay substrate.Particularly, the figure of each pressure sensitivity detecting electrode can be the regular figures such as square, rectangle, circle, can certainly be irregular figure, in this no limit.
Owing to being independent of each other between each pressure sensitivity detecting electrode, namely there is gap to exist between adjacent two pressure sensitivity detecting electrodes, thus cause the light transmission rate at the gap location of adjacent pressure sensitivity detecting electrode and pressure sensitivity detecting electrode place inconsistent, the homogeneity of impact display.Therefore, in order to the homogeneity making the setting of each pressure sensitivity detecting electrode not affect In-cell touch panel light transmission rate when showing, in the specific implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, the black matrix layer between underlay substrate and subtend substrate is also comprised; Gap between each pressure sensitivity detecting electrode is positioned at the region of black matrix layer in the orthogonal projection of underlay substrate in the orthogonal projection of underlay substrate.
Further, in the specific implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, black matrix layer specifically can be arranged on the side of underlay substrate towards subtend substrate, also the side of subtend real estate to underlay substrate can be arranged on, in this no limit.
In the above-mentioned In-cell touch panel that the utility model embodiment provides, when the material of each pressure sensitivity detecting electrode is metal material, in order to the homogeneity making each pressure sensitivity detecting electrode of increase not affect the light transmission rate of viewing area, the figure of each pressure sensitivity detecting electrode generally can by the graph shealtering of black matrix layer, and namely the orthogonal projection of figure on array base palte of each pressure sensitivity detecting electrode is positioned at the region at the figure place of black matrix layer.
And, in the specific implementation, the figure orthogonal projection be traditionally arranged to be on underlay substrate of each pressure sensitivity detecting electrode is positioned at the fenestral fabric of the figure region of black matrix layer, this fenestral fabric is specifically made up of the horizontal list structure identical with grid line bearing of trend and the longitudinal strip structure identical with data line bearing of trend, is namely equivalent to be arranged between multirow organic electroluminescent pixel unit and multiple row organic electroluminescent pixel unit.The figure of certain each pressure sensitivity detecting electrode also can only be arranged to horizontal list structure, can also only be arranged to longitudinal strip structure, can design according to actual parameter, in this no limit.
Usually, the touch-control density of In-cell touch panel is usually at grade, therefore, in the specific implementation, can the density of each pressure sensitivity detecting electrode and area occupied be selected to ensure required touch accuracy according to required pressure sensitivity touch-control density, the touch-control density of usual each pressure sensitivity detecting electrode be at grade, and the density of display screen is usually at micron order, therefore, a general pressure sensitivity detecting electrode can multiple organic electroluminescent pixel unit in corresponding display screen.
Further, because In-cell touch panel is generally be fixed on the housing of display device by the frame region around viewing area, therefore, when adopting identical dynamics to press central area and the fringe region of In-cell touch panel, the easier distance be converted to by pressure between pressure sensitivity detecting electrode and cathode layer of pressure sensitivity detecting electrode of central area changes, and namely central area is more responsive for the induction of pressure than fringe region.Therefore, in order to the precision of the whole viewing area pressure sensitive making In-cell touch panel is relatively uniform, in the specific implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, can, along the direction in the points toward edge region, central area of underlay substrate, the area occupied of each pressure sensitivity detecting electrode region on underlay substrate be made to become large gradually.Like this, for the neighboring area that the precision of pressure sensitive in In-cell touch panel is relatively poor, the area of pressure sensitivity detecting electrode is become large, and the capacitance of pressure sensitivity detecting electrode can be made relatively to become large, and the change for capacitance also can increase.
Further, each pressure sensitivity detecting electrode generally needs to realize being electrically connected by the wire corresponding with it and pressure sensitivity detection chip, therefore, in the specific implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, as shown in Figure 3 a and Figure 3 b shows, also comprise: with each pressure sensitivity detecting electrode 300 wire 310 one to one, and with each pressure sensitivity detecting electrode 300 conducting tie point 120 one to one; Wherein, each wire 310 is positioned at the region of black matrix layer in the orthogonal projection of underlay substrate 100 in the orthogonal projection of underlay substrate 100, and each conducting tie point 120 is positioned at the neighboring area 140 of In-cell touch panel around viewing area 130; After each pressure sensitivity detecting electrode 300 is connected with conducting tie point 120 by wire 310, by with conducting tie point 120 one to one and be arranged in the metal routing (Fig. 3 a and Fig. 3 b is all not shown) of neighboring area and pressure sensitivity detection chip (Fig. 3 a and Fig. 3 b is all not shown) is electrically connected.Achieve each pressure sensitivity detecting electrode like this and pressure sensitivity detection chip is electrically connected, and make wire not affect the aperture opening ratio of In-cell touch panel.
Further, in the specific implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, as shown in Figure 3 a, neighboring area 140 has four sides, and conducting tie point 120 all has distribution at each side of neighboring area 140; And the conducting tie point 120 corresponding with each pressure sensitivity detecting electrode 300 is distributed in the side edge of the neighboring area 140 nearest with pressure sensitivity detecting electrode 300.Like this, reduce the decay of signal in wire, improve the transmission stability of signal.
Or in the specific implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, as shown in Figure 3 b, each conducting tie point 120 is all distributed in a side edge of neighboring area 140.Like this, only wire 310 need be arranged along a direction, simplify preparation technology, enhance productivity.
Conceive based on same utility model, the utility model embodiment still provides a kind of driving method of above-mentioned In-cell touch panel, as shown in Figure 4, at least comprises display stage and pressure sensitivity touch-control stage in a frame time; Wherein,
S401, display the stage, pressure sensitivity detection chip not to pressure sensitivity detecting electrode apply signal;
S402, in the pressure sensitivity touch-control stage, pressure sensitivity detection chip applies pressure sensitivity detection signal to pressure sensitivity detecting electrode, and judges the pressure size of position of touch by the change detecting the capacitance between pressure sensitivity detecting electrode and cathode layer.
Particularly, in the pressure sensitivity touch-control stage, pressure sensitivity detection chip applies pressure sensitivity detection signal to pressure sensitivity detecting electrode, and anticathode layer applies fixed value voltage signal simultaneously.In this stage, when pressure sensitivity detecting electrode position is pressed, the distance between pressure sensitivity detecting electrode and cathode layer can be caused to change, thus cause the change of the capacitance of the capacitance structure formed between the two, the duration of charging of electric capacity is changed, therefore pressure sensitivity detection chip can judge the change of capacitance by the change in the duration of charging detecting the electric capacity of pressure sensitivity detecting electrode, and then judges the pressure size of position of touch, realizes pressure sensitivity touch controllable function.
Further, due to pressure sensitivity detecting electrode is multiplexed with self-capacitance electrode, achieve capacitive touch function, in the specific implementation, in the above-mentioned driving method that the utility model embodiment provides, also comprise in a frame time: the capacitance touching control stage, wherein, in the capacitance touching control stage, pressure sensitivity detection chip applies capacitance detecting signal to pressure sensitivity detecting electrode, and determines position of touch by the change of the capacitance detecting pressure sensitivity detecting electrode.
Particularly, in the capacitance touching control stage, the electric capacity of pressure sensitivity detecting electrode to ground electrode (referring to other electrode on underlay substrate except pressure sensitivity detecting electrode and signal wire) is larger, the degree of accuracy of capacitance touching control is less, therefore in order to ensure the degree of accuracy of capacitance touching control, in the capacitance touching control stage, pressure sensitivity detection chip not only applies capacitance detecting signal to pressure sensitivity detecting electrode, and identical capacitance detecting signal can be applied by the ground electrode corresponding to this pressure sensitivity detecting electrode, thus make the base electric capacity of pressure sensitivity detecting electrode can be 0 in theory.
In the specific implementation, in the above-mentioned driving method that the utility model embodiment provides, in order to better distinguish pressure sensitivity touch-control stage and capacitance touching control stage, pressure sensitivity detection signal chooses different signals from capacitance detecting signal, and such as pressure sensitivity detection signal is different from the amplitude of capacitance detecting signal; Certain pressure sensitivity detection signal and capacitance detecting signal also can be identical signals, in this no limit.
Driver' s timing figure below by a frame time is described in detail to the driving method that the utility model embodiment provides, the signal Sensor in a frame time, pressure sensitivity detecting electrode applied is only gived, the sequential chart of the signal Data that a signal Gate and data line that a grid line in the signal Vss that cathode layer applies and the ground electrode corresponding to pressure sensitivity detecting electrode applies applies in Fig. 5.It should be noted that, the present embodiment is to better explain the utility model, but does not limit the utility model.
In driver' s timing figure as shown in Figure 5, a frame time comprises: display stage t1, capacitance touching control stage t2 and pressure sensitivity touch-control stage t3; Wherein,
At display stage t1, pressure sensitivity detecting electrode is not applied to signal, is in floating; In addition, the signal Data that the signal Gate that signal Vss cathode layer applied, grid line apply and data line apply is the In-cell touch panel signal required when normal display.
At capacitance touching control stage t2, the signal Data that the signal Gate that the signal Vss that the signal Sensor that pressure sensitivity detecting electrode applies, cathode layer apply, grid line apply and data line apply is capacitance detecting signal.
At pressure sensitivity touch-control stage t3, the signal Sensor that pressure sensitivity detecting electrode applies is pressure sensitivity detection signal, and the signal Data that the signal Gate that the signal Vss that cathode layer applies, grid line apply and data line apply is fixed voltage signal.
Conceive based on same utility model, the utility model embodiment still provides a kind of display device, comprises the above-mentioned In-cell touch panel that the utility model embodiment provides.This display device can be: any product or parts with Presentation Function such as mobile phone, panel computer, televisor, display, notebook computer, digital album (digital photo frame), navigating instrument.Other requisite ingredient for this display device is and will be understood by those skilled in the art that to have, and does not repeat at this, also should as to restriction of the present utility model.The enforcement of this display device see the embodiment of above-mentioned encapsulating structure, can repeat part and repeats no more.
The In-cell touch panel that the utility model embodiment provides and display device, by increasing pressure sensitivity detecting electrode between the cathode layer and subtend substrate of organic electroluminescent pixel unit, make pressure sensitivity detecting electrode and cathode layer form capacitance structure; When pressure sensitivity detecting electrode position is pressed, distance between pressure sensitivity detecting electrode and cathode layer changes and brings the change of electric capacity between the two thereupon, therefore, increase pressure sensitivity detection chip, in the pressure sensitivity touch-control stage, pressure sensitivity detection signal is applied to pressure sensitivity detecting electrode, and the pressure size of position of touch is judged by the change detecting the capacitance between pressure sensitivity detecting electrode and cathode layer, pressure sensitivity touch controllable function can be realized.And the above-mentioned In-cell touch panel that the utility model embodiment provides is at pressure sensitivity touch-control stage multiplexing cathode layer, and pressure sensitivity detecting electrode is integrated in touch-screen inside, less to the structural design change of display device, the restriction of build-up tolerance can not be subject to, be conducive to realizing better detection accuracy, and be conducive to saving cost of manufacture.
Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.
Claims (10)
1. an In-cell touch panel, comprise: underlay substrate, the subtend substrate be oppositely arranged with described underlay substrate and be positioned at the multiple organic electroluminescent pixel unit that in matrix arrange of described underlay substrate towards described subtend substrate side, wherein each described organic electroluminescent pixel unit comprises the anode layer, luminescent layer and the cathode layer that are positioned at successively on described underlay substrate; It is characterized in that, also comprise:
Pressure sensitivity detection chip and the multiple separate pressure sensitivity detecting electrode between described cathode layer and described subtend substrate; Wherein,
Described pressure sensitivity detecting electrode and described cathode layer form capacitance structure;
Described pressure sensitivity detection chip is used for applying pressure sensitivity detection signal in the pressure sensitivity touch-control stage to described pressure sensitivity detecting electrode, and is judged the pressure size of position of touch by the change detecting the capacitance between described pressure sensitivity detecting electrode and described cathode layer.
2. In-cell touch panel as claimed in claim 1, it is characterized in that, described pressure sensitivity detecting electrode is multiplexed with self-capacitance electrode;
Described pressure sensitivity detection chip also for applying capacitance detecting signal in the capacitance touching control stage to described pressure sensitivity detecting electrode, and determines position of touch by the change of the capacitance detecting described pressure sensitivity detecting electrode.
3. In-cell touch panel as claimed in claim 2, it is characterized in that, each described pressure sensitivity detecting electrode is arranged with layer.
4. In-cell touch panel as claimed in claim 3, it is characterized in that, the material of each described pressure sensitivity detecting electrode is transparent conductive material, and described pressure sensitivity detecting electrode covers at least one organic electroluminescent pixel unit in the orthogonal projection of underlay substrate.
5. In-cell touch panel as claimed in claim 4, is characterized in that, also comprise: the black matrix layer between described underlay substrate and described subtend substrate;
Gap between each described pressure sensitivity detecting electrode is positioned at the region of described black matrix layer at the orthogonal projection place of described underlay substrate in the orthogonal projection of described underlay substrate.
6. In-cell touch panel as claimed in claim 3, is characterized in that, also comprise: the black matrix layer between described underlay substrate and described subtend substrate;
The material of each described pressure sensitivity detecting electrode is metal material, and the figure of each described pressure sensitivity detecting electrode is the fenestral fabric being positioned at the figure region of described black matrix layer in the orthogonal projection of described underlay substrate.
7. In-cell touch panel as claimed in claim 3, it is characterized in that, along the direction in the points toward edge region, central area of described underlay substrate, the area occupied of each described pressure sensitivity detecting electrode region on described underlay substrate becomes large gradually.
8. the In-cell touch panel as described in claim 5 or 6, is characterized in that, also comprises: with each described pressure sensitivity detecting electrode wire one to one, and with each described pressure sensitivity detecting electrode conducting tie point one to one; Wherein,
Each described wire is positioned at the region of described black matrix layer at the orthogonal projection place of described underlay substrate in the orthogonal projection of described underlay substrate, and each described conducting tie point is positioned at the neighboring area of described In-cell touch panel around viewing area;
After each described pressure sensitivity detecting electrode is connected with described conducting tie point by described wire, by with described conducting tie point one to one and be positioned at the metal routing of described neighboring area and described pressure sensitivity detection chip is electrically connected.
9. In-cell touch panel as claimed in claim 8, it is characterized in that, described neighboring area has four sides, and described conducting tie point all has distribution at each side of described neighboring area; And the conducting tie point corresponding with each described pressure sensitivity detecting electrode is distributed in the side edge of the neighboring area nearest with described pressure sensitivity detecting electrode.
10. a display device, is characterized in that, comprises the In-cell touch panel as described in any one of claim 1-9.
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Cited By (15)
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| CN105718129A (en) * | 2016-04-20 | 2016-06-29 | 京东方科技集团股份有限公司 | Touch display panel and driving method thereof |
| CN105975121A (en) * | 2016-04-27 | 2016-09-28 | 京东方科技集团股份有限公司 | Touch detection circuit, driving method, embedded touch screen and display apparatus |
| CN106125986A (en) * | 2016-07-04 | 2016-11-16 | 上海天马微电子有限公司 | A kind of touch-control display panel and electronic equipment |
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| CN106201112A (en) * | 2016-08-12 | 2016-12-07 | 京东方科技集团股份有限公司 | A kind of pressure touch display device and touch-control pressure detection method thereof |
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