CN202870793U - Capacitance-type embedded touch screen and display device - Google Patents
Capacitance-type embedded touch screen and display device Download PDFInfo
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- CN202870793U CN202870793U CN 201220568932 CN201220568932U CN202870793U CN 202870793 U CN202870793 U CN 202870793U CN 201220568932 CN201220568932 CN 201220568932 CN 201220568932 U CN201220568932 U CN 201220568932U CN 202870793 U CN202870793 U CN 202870793U
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Abstract
The utility model discloses a capacitance-type embedded touch screen and a display device. The common electrode layer which is the whole surface connected is divided in the thin film transistor (TFT) array substrate, and touch induction electrodes and touch driving electrodes are formed and mutually insulating. And mental driving electrodes and mental induction electrodes are arranged respectively, wherein the mental driving electrodes and the mental induction electrodes are in electrical property connection with each touch driving electrode and each touch induction electrode correspondingly. Values of resistances of the touch driving electrodes and the touch induction electrodes are reduced. The touch driving electrodes and the touch induction electrodes are time-sharing driven in order to achieve a touch function and a display function. The capacitance-type embedded touch screen changes the common electrode layer to achieve the touch function. Therefore, on the basis of the existing TFT array substrate preparation technology, the touch screen can be made without increasing the extra technology and cost of production is saved and production efficiency is improved. In addition, due to the fact that time-sharing driven touch and the display function are adopted, mutual interference can be reduced and the image quality and the touch accuracy are improved.
Description
Technical field
The utility model relates to the display technique field, relates in particular to the embedded touch-screen of a kind of condenser type and display device.
Background technology
Along with the develop rapidly of display technique, touch-screen (Touch Screen Panel) spreads all in people's the life gradually.At present, touch-screen can be divided into according to forming structure: external hanging type touch-screen (Add on ModeTouch Panel), covering surfaces formula touch-screen (On Cell Touch Panel) and embedded touch-screen (InCell Touch Panel).Wherein, the external hanging type touch-screen is with touch-screen and LCDs (Liquid CrystalDisplay, LCD) separately produce, then fitting to becomes the LCDs with touch function together, and there are the shortcomings such as cost of manufacture is higher, light transmission rate is lower, module is thicker in the external hanging type touch-screen.And embedded touch-screen is embedded in LCDs inside with the touch-control electrode of touch-screen, and thickness that can attenuate module integral body can reduce again the cost of manufacture of touch-screen greatly, is subject to each large panel producer favor.
At present, existing condenser type embedded (in cell) touch-screen is at existing TFT(Thin FilmTransistor, what Thin Film Transistor (TFT)) direct in addition increase touch-control sweep trace and touch induction lines realized on the array base palte, namely make the strip ITO electrode that two-layer mutual antarafacial intersects on the surface of tft array substrate, this two-layer ITO(Indium Tin Oxides, indium tin metal oxide) electrode as touch-control drive wire and the touch induction lines of touch-screen, forms inductance capacitance in the antarafacial intersection of two ITO electrodes respectively.Its course of work is: when the ITO electrode as the touch-control drive wire is loaded touch-control driving signal, detect the voltage signal that touch induction lines is coupled out by inductance capacitance, in this process, when human body contact touch-screen is arranged, people's bulk electric field will act on the inductance capacitance, and the capacitance of inductance capacitance is changed, and then changes the voltage signal that touch induction lines is coupled out, according to the variation of voltage signal, just can determine contact position.
The structural design of the embedded touch-screen of above-mentioned condenser type need to increase new rete at existing tft array substrate, causes need to increasing new technique when making tft array substrate, and production cost is increased, and is unfavorable for enhancing productivity.
The utility model content
The utility model embodiment provides the embedded touch-screen of a kind of condenser type and display device, in order to the embedded touch-screen of condenser type of realizing that cost is lower, production efficiency is higher.
The embedded touch-screen of a kind of condenser type that the utility model embodiment provides comprises the tft array substrate with common electrode layer, in described tft array substrate, is provided with to be a plurality of pixel cells that matrix is arranged,
Described common electrode layer has touch-control sensing electrode and the touch-control drive electrode of mutually insulated; In the displaying time section, described touch-control drive electrode and described touch-control sensing electrode are applied common electrode signal; In the touch-control time period, described touch-control drive electrode is applied touch scanning signals, described touch-control sensing electrode is for voltage signal and the output of the described touch scanning signals that is coupled;
Described tft array substrate has many strip metals drive electrode and/or the many strip metals induction electrode that extends along the line direction of pixel cell, the gap location of described metal driving electrode between the pixel cell of adjacent lines, and be electrical connected with corresponding described touch-control drive electrode; The gap location of described metal induction electrode between the pixel cell of adjacent lines, and be electrical connected with corresponding described touch-control sensing electrode.
A kind of display device that the utility model embodiment provides comprises the embedded touch-screen of condenser type that the utility model embodiment provides.
The beneficial effect of the utility model embodiment comprises:
The embedded touch-screen of a kind of condenser type and display device that the utility model embodiment provides, the common electrode layer of whole connection in the tft array substrate is cut apart, form touch-control sensing electrode and the touch-control drive electrode of mutually insulated, touch-control drive electrode and touch-control sensing electrode are carried out the timesharing driving, to realize touch controllable function and Presentation Function.Because being the common electrode layer structure to tft array substrate, the touch-screen that provides of the utility model embodiment changes to realize touch controllable function, therefore, on existing tft array substrate preparation technology's basis, do not need to increase extra technique and namely can be made into touch-screen, save production cost, improved production efficiency.And, owing to adopt timesharing to drive touch-control and Presentation Function, also can reduce the phase mutual interference, improve picture quality and touch-control accuracy.
In addition, because touch-control drive electrode and touch-control sensing electrode have common electrode layer in the demonstration stage effect, therefore, each touch-control drive electrode and each touch-control sensing electrode are usually by higher the preparing such as ITO or IZO material of resistance, produce easily the problem of signal time delay when transmitting touching signals in the demonstration stage, and in the touch-screen that the utility model embodiment provides, in order to reduce the resistance of each touch-control drive electrode and/or touch-control sensing electrode, reduce signal time delay, in tft array substrate, be provided with the many strip metals drive electrode that is electrical connected with each touch-control drive electrode, and the many strip metals induction electrode that is electrical connected with each touch-control sensing electrode, reduced greatly the resistance of touch-control drive electrode and touch-control sensing electrode, and these metal driving electrodes and metal induction electrode are between the pixel cell of adjacent lines, also can not take the open area of touch-screen, thereby guarantee the aperture opening ratio that touch-screen is required.
Description of drawings
One of synoptic diagram of public electrode layer pattern in the touch-screen that Fig. 1 provides for the utility model embodiment;
In the touch-screen that Fig. 2 provides for the utility model embodiment two of the synoptic diagram of public electrode layer pattern;
The enlarged drawing at A place among Fig. 2 that Fig. 3 provides for the utility model embodiment;
The CONSTRUCTED SPECIFICATION figure at B place among Fig. 3 that Fig. 4 provides for the utility model embodiment;
The distribution schematic diagram of metal touch-control electrode, metal induction electrode and metal public electrode in the tft array substrate that Fig. 5 provides for the utility model embodiment;
The structural representation of double-gate structure in the touch-screen that Fig. 6 provides for the utility model embodiment;
The enlarged diagram at C place among Fig. 3 that Fig. 7 provides for the utility model embodiment.
Embodiment
At present, the lcd technology that can realize wide visual angle mainly contains plane internal switch (IPS, In-PlaneSwitch) technology and senior super dimension field switch (ADS, Advanced Super Dimension Switch) technology; Wherein, the electric field that the electric field that the ADS technology produces by gap electrode edge in the same plane and gap electrode layer and plate electrode interlayer produce forms multi-dimensional electric field, make in the liquid crystal cell between gap electrode, all aligned liquid-crystal molecules can both produce rotation directly over the electrode, thereby improved the liquid crystal work efficiency and increased light transmission efficiency.A senior super dimension switch technology can improve the picture quality of TFT-LCD product, has high resolving power, high permeability, low-power consumption, wide visual angle, high aperture, low aberration, without advantages such as water of compaction ripples (pushMura).H-ADS(high aperture-senior super dimension field switch) be a kind of important implementation of ADS technology.
The utility model embodiment just is being based on the ADS technology and the H-ADS technology has proposed the embedded touch screen structure of a kind of new condenser type.Below in conjunction with accompanying drawing, the embodiment of the embedded touch-screen of condenser type, its driving method and the display device that the utility model embodiment is provided is described in detail.
Each layer film thickness and shape do not reflect the true ratio of tft array substrate or color membrane substrates in the accompanying drawing, and purpose is signal explanation the utility model content just.
The embedded touch-screen of a kind of condenser type that the utility model embodiment provides specifically comprises: have the tft array substrate of common electrode layer, be provided with a plurality of pixel cells that are the matrix arrangement in tft array substrate;
This common electrode layer has touch-control sensing electrode and the touch-control drive electrode of mutually insulated; In the displaying time section, touch-control drive electrode and touch-control sensing electrode are applied common electrode signal; In the touch-control time period, the touch-control drive electrode is applied touch scanning signals, the touch-control sensing electrode is used for voltage signal and the output of coupling touch scanning signals;
Tft array substrate has many strip metals drive electrode and/or the many strip metals induction electrode that extends along the line direction of pixel cell, the gap location of metal driving electrode between the pixel cell of adjacent lines, and be electrical connected with corresponding touch-control drive electrode; The gap location of metal induction electrode between the pixel cell of adjacent lines, and be electrical connected with corresponding touch-control sensing electrode.
The touch-screen that the utility model embodiment provides redesigns optimization with the public electrode layer pattern of whole connection, form touch-control drive electrode and touch-control sensing electrode, adopting timesharing to drive shows and touch controllable function, namely be divided in the frame time and show constantly and the touch-control moment, showing that the moment applies common electrode signal to touch-control sensing electrode and touch-control drive electrode, constantly the touch-control drive electrode is applied touch scanning signals at touch-control, be coupled the simultaneously voltage signal of touch scanning signals of touch-control sensing electrode.Owing to be that structure to common electrode layer changes, therefore, can on existing tft array substrate preparation technology's basis, not increase extra technique and namely can be made into touch-screen, saved production cost, improved production efficiency.And, owing to adopt timesharing to drive touch-control and Presentation Function, also can reduce the phase mutual interference, improve picture quality and touch-control accuracy.
In addition, because touch-control drive electrode and touch-control sensing electrode have common electrode layer in the demonstration stage effect, therefore, each touch-control drive electrode and each touch-control sensing electrode are usually by higher the preparing such as ITO or IZO material of resistance, produce easily the problem of signal time delay when transmitting touching signals in the demonstration stage, and in the touch-screen that the utility model embodiment provides, in order to reduce the resistance of each touch-control drive electrode and/or touch-control sensing electrode, reduce signal time delay, in tft array substrate, be provided with the many strip metals drive electrode that is electrical connected with each touch-control drive electrode, and the many strip metals induction electrode that is electrical connected with each touch-control sensing electrode, reduced greatly the resistance of touch-control drive electrode and touch-control sensing electrode, and these metal driving electrodes and metal induction electrode are between the pixel cell of adjacent lines, also can not take the open area of touch-screen, thereby guarantee the aperture opening ratio that touch-screen is required.
The below is described in detail the concrete structure of the common electrode layer of above-mentioned touch-screen.
Particularly, utilize touch-control sensing electrode that common electrode layer forms generally to extend along the column direction of the pixel cell of tft array substrate; The touch-control drive electrode generally extends along the line direction of the pixel cell of tft array substrate, and the bearing of trend of touch-control sensing electrode and touch-control drive electrode can along other directions, not done restriction at this yet certainly.Usually, the precision of touch-screen is usually at grade, can be according to the density of required touch-control accuracy selection touch-control drive electrode and touch-control sensing electrode and width to guarantee required touch-control precision, to be controlled at 5-7mm be good to the width of touch-control drive electrode and touch-control sensing electrode usually.And the precision of liquid crystal display is usually at micron order, and therefore, a general touch-control drive electrode and touch-control sensing electrode can cover the pixel cell of multirow or multiple row liquid crystal display.The size of touch control unit of the touch-screen that the precision of indication refers among the utility model embodiment or the pixel cell of display screen.
Particularly, touch-control drive electrode and the touch-control sensing electrode arranged in common electrode layer can have the strip shaped electric poles structure, Rhombus electrode structure (as shown in Figure 1) or the slotting electrode array configurations (as shown in Figure 2) that refers to, connect up along the vertical direction among the figure at the touch-control sensing electrode 01 shown in Fig. 1 and Fig. 2, touch-control drive electrode 02 connects up along the horizontal direction among the figure, because touch-control sensing electrode 01 and touch-control drive electrode 02 are being arranged with layer, therefore, mutually insulated (forms a touch-control drive electrode 02 by 5 touch-control driven element electrodes in the diamond structure as shown in Figure 1 between a plurality of touch-control driven element electrodes of a touch-control drive electrode 02 of composition, form a touch-control drive electrode 02 by 4 touch-control driven element electrodes in the slotting finger electrode structure as shown in Figure 2), after can will forming each touch-control driven element electrode bridge joint of same touch-control drive electrode by metal bridge, utilize a signal wire that it is inputted touch scanning signals, also can distinguish signalization line to its input drive signal to each the touch-control driven element electrode that forms same touch-control drive electrode, as shown in Figure 2, do not do restriction at this.Represent a touch control unit such as dotted line frame A among Fig. 2, do not do restriction among number the utility model embodiment of touch control unit, exemplaryly among Fig. 2 provided 2*3 touch control unit.
Preferably, when touch-control drive electrode and the design of the slotting finger of touch-control sensing electrode employing electrode array configurations, with respect to strip shaped electric poles structure and Rhombus electrode structure, can increase the Inductance and Capacitance between touch-control sensing electrode and the touch-control drive electrode, thereby improve sensitivity and the accuracy of touch-control.
Further, as shown in Figure 2, because the precision of touch-screen is usually at grade, and the precision of liquid crystal display is usually at micron order, therefore, when touch-control sensing electrode and touch-control drive electrode are set, the gap that can have several row pixel cells between the two, like this, can also have public electrode 03 at the gap location of common electrode layer between touch-control sensing electrode and touch-control drive electrode, this public electrode 03 and touch-control sensing electrode 01 and touch-control drive electrode 02 mutually insulated, public electrode 03 is the access common electrode signal when work, guarantees can show normally work at the pixel cell of public electrode 03 corresponding region.
Further, because public electrode 03 is distributed in the gap location of touch-control sensing electrode 01 and touch-control drive electrode 02, when its access common electrode signal, might be subject to the impact of the touching signals of access in touch-control sensing electrode 01 and the touch-control drive electrode 02, therefore, as shown in Figure 2, edge in common electrode layer can also have the public electrode 03 of encirclement, the common electrical polar ring 04 of touch-control sensing electrode 01 and touch-control drive electrode 02, the common electrode signal of access public electrode 03 is linked in the common electrical polar ring 04 simultaneously, with the stable voltage of inputting the common electrode signal of whole panel, can improve so whole display performance.
Fig. 3 is the enlarged drawing of a-quadrant among Fig. 2, and Fig. 4 is the enlarged drawing in B zone among Fig. 3, utilizes the shadow region to divide touch-control sensing electrode 01 and touch-control drive electrode 02 in Fig. 4, and remainder is public electrode 03 among the figure.
Further, pattern according to the concrete display panels of using of above-mentioned touch-screen, as mentioned above, the precision of touch-screen is usually at grade, the precision of liquid crystal display is usually at micron order, therefore, as shown in Figure 4, each touch-control drive electrode 02, touch-control sensing electrode 01 and public electrode 03 generally can cover the pixel cell of multirow or multiple row liquid crystal display, certainly do not get rid of the situation that each electrode only covers single file or single column of pixels unit, do not get rid of the situation that each electrode only covers hemistich or half row pixel cell yet.And, general separated along pixel cell between each touch-control sensing electrode 01 of touch-control, touch-control drive electrode 02 and the public electrode 03.Like this, every touch-control sensing electrode 01, touch-control drive electrode 02 and public electrode 03 position corresponding with the open area of pixel cell of composition common electrode layer has strip like transparent electrode structure or tabular transparent electrode structure.
Particularly, every touch-control sensing electrode 01, touch-control drive electrode 02 and public electrode 03 zone corresponding with the open area of pixel cell that forms common electrode layer when the ADS pattern has list structure, and pixel electrode has platy structure: in the displaying time section, each electrode in the common electrode layer is applied common electrode signal, and produce the rotation of electric field controls liquid crystal molecule between the pixel electrode, realize Presentation Function; In the touch-control time period, load touch scanning signals on each touch-control drive electrode in the common electrode layer, form voltage signal and the output of inserting this touch scanning signals of touch-control sensing electrode coupling that refers to electrode structure with the touch-control drive electrode, can realize touch controllable function by the voltage signal on detecting touch-control sensing electrode this moment; In the touch-control time period, can load common electrode signal on the public electrode in the common electrode layer always, but owing to the TFT with each pixel cell closes, loaded and displayed signal not on pixel electrode, therefore each pixel cell corresponding with public electrode, touch-control sensing electrode and touch-control drive electrode can not show image.
Similarly, every touch-control sensing electrode 01, touch-control drive electrode 02 and public electrode 03 zone corresponding with the open area of pixel cell that forms common electrode layer when the HADS pattern has platy structure, pixel electrode has list structure, the touch-screen of its principle of work and above-mentioned ADS pattern is similar, does not do detailed description at this.And, because the concrete structure of the liquid crystal panel of ADS pattern and HADS pattern belongs to prior art, do not giving unnecessary details at this yet.
In the specific implementation, as shown in Figure 5, can be with for reducing the data signal line Data1 in the metal driving electrode 061 of touch-control drive electrode 01 resistance value and the tft array substrate, Data2, Data3, Data4 and Data5 arrange with layer, metal driving electrode 061 is electrical connected by at least one via hole and touch-control drive electrode 01, and, because data signal line Data1, Data2, Data3, Data4 and Data5 extend along the column direction of pixel cell, therefore, need to be with metal driving electrode 061 and data signal line Data1, Data2, Data3, Data4 and Data5 mutually insulated arrange.Like this, do not need to increase extra preparation section during tft array substrate in preparation, only need to can save preparation cost, the improving product added value by the figure that a composition technique can form data signal line and metal driving electrode.
In like manner, also the signal line in metal driving electrode and the tft array substrate can be arranged with layer, the metal driving electrode is electrical connected by at least one via hole and touch-control drive electrode, and, disturb for fear of signal, also need metal driving electrode and the setting of signal line mutually insulated.Like this, do not need to increase extra preparation section during tft array substrate in preparation, only need to can save preparation cost, the improving product added value by the figure that a composition technique can form signal line and metal driving electrode.
Further, in the specific implementation, the metal driving electrode can also be set directly at the upper strata of touch-control drive electrode, also can be set directly at the lower floor of touch-control drive electrode, can also the metal driving electrode be set simultaneously in the upper and lower of touch-control drive electrode, not limit the particular location of metal driving electrode at this.Metal driving electrode direct and that the touch-control drive electrode is electrical connected can better reduce the resistance of touch-control drive electrode, avoids signal time delay.But, the metal driving electrode that directly is electrical connected with the touch-control drive electrode need to prepare by independent composition technique, therefore, although the up and down two-layer metal driving electrode that directly is electrical connected that all arranges at the touch-control drive electrode can farthest reduce its resistance respectively, but also can bring preparation technology's increase, therefore, can select according to actual needs the number of plies and the hierarchical relationship of the metal driving electrode for preparing.
Similarly, in the specific implementation, as shown in Figure 5, can be with for reducing the data signal line Data1 in the metal induction electrode 062 of touch-control sensing electrode 02 resistance value and the tft array substrate, Data2, Data3, Data4 and Data5 arrange with layer, metal induction electrode 062 is electrical connected by at least one via hole and touch-control sensing electrode 02, and, because data signal line Data1, Data2, Data3, Data4 and Data5 extend along the column direction of pixel cell, therefore, need to be with metal induction electrode 062 and data signal line Data1, Data2, Data3, Data4 and Data5 mutually insulated arrange.Like this, do not need to increase extra preparation section during tft array substrate in preparation, only need to can save preparation cost, the improving product added value by the figure that a composition technique can form data signal line and metal induction electrode.
In like manner, also the signal line in metal induction electrode and the tft array substrate can be arranged with layer, the metal induction electrode is electrical connected by at least one via hole and touch-control sensing electrode, and, disturb for fear of signal, also need metal induction electrode and the setting of signal line mutually insulated.Like this, do not need to increase extra preparation section during tft array substrate in preparation, only need to can save preparation cost, the improving product added value by the figure that a composition technique can form signal line and metal induction electrode.
Further, in the specific implementation, the metal induction electrode can also be set directly at the upper strata of touch-control sensing electrode, also can be set directly at the lower floor of touch-control sensing electrode, can also the metal induction electrode be set simultaneously in the upper and lower of touch-control sensing electrode, not limit the particular location of metal induction electrode at this.Metal induction electrode direct and that the touch-control sensing electrode is electrical connected can better reduce the resistance of touch-control sensing electrode, avoids signal time delay.But, the metal induction electrode that directly is electrical connected with the touch-control sensing electrode need to prepare by independent composition technique, therefore, although the up and down two-layer metal induction electrode that directly is electrical connected that all arranges at the touch-control sensing electrode can farthest reduce its resistance respectively, but also can bring preparation technology's increase, therefore, can select according to actual needs the number of plies and the hierarchical relationship of the metal induction electrode for preparing.
Further, when when the gap location of common electrode layer between touch-control sensing electrode 02 and touch-control drive electrode 01 also has public electrode 03, as shown in Figure 5, in tft array substrate, can also be provided with the many strip metals public electrode 063 that is electrical connected with corresponding public electrode 03, the gap location of metal public electrode 063 between the pixel cell of adjacent lines arranges and mutually insulated with layer with metal induction electrode 062 or metal driving electrode 061.
Particularly, can be according to the hierarchical relationship of actual metal drive electrode and metal induction electrode, metal public electrode and signal line are arranged with layer, or arrange with layer with data signal line, can also directly the metal public electrode be arranged on upper strata and/or the lower floor of public electrode, be not described in detail in this.
The below is described in detail the signal access way of the touch-control sensing electrode in the common electrode layer of above-mentioned touch-screen, touch-control drive electrode and public electrode.
In the specific implementation, can on tft array substrate, arrange separately with common electrode layer in touch-control sensing electrode, the signal wire that the touch-control drive electrode is corresponding, namely, the signal wire that gap location setting between each pixel cell is corresponding with each touch-control sensing electrode, touch-control drive electrode and public electrode, when realizing touch controllable function and Presentation Function, it is inputed or outputed corresponding signal, the above-mentioned this wire laying mode of signal wire of arranging between pixel cell can take part LCDs open area, causes aperture opening ratio to reduce.
Preferably, in order to improve to greatest extent the aperture opening ratio of touch display screen, dot structure in the tft array substrate of the touch-screen that the utility model embodiment provides can adopt double grid (Dual Gate) structure in the specific implementation, as shown in Figure 6, in this structure, have two signal line Gate1 and Gate2 between the pixel cell of the adjacent lines on the tft array substrate, Gate3 and Gate4, and be listed as take two adjacent row pixel cells as one group of pixel cell, every group of pixel cell row share the data signal line Date1 between this two row pixel cell, Date2, Date3, Date4.
Above-mentioned this double-gate structure saves the position of a part of data signal line by the signal line of the quantity that doubles.Like this, as shown in Figure 6, gap location setting that just can be between adjacent sets pixel cell row and data signal line Date1, Date2, Date3, Date4 are with the metallic signal lines 05 of layer setting, certainly those skilled in the art as can be known, it also can be the different layers setting between this metallic signal lines 05 and the data signal line, between separate by insulation course, do not do restriction at this.Utilize each electrode in 05 pair of common electrode layer of these metallic signal lines to input or output corresponding electric signal, above-mentioned this wire laying mode utilizes the location arrangements metallic signal lines of a part of data line that double-gate structure saves, the open area can be too much do not taken, the aperture opening ratio of display screen can be guaranteed to greatest extent.
Particularly, shown in Figure 3 such as A place enlarged drawing among Fig. 2, the metallic signal lines in the above-mentioned double-gate structure can be divided into following three kinds according to function: touching signals output line 051, touching signals input line 052 and common electrode signal input line 053; Wherein,
Touching signals input line 052 is electrically connected with touch-control drive electrode 02; Touching signals output line 051 is electrically connected with touch-control sensing electrode 01; Common electrode signal input line 053 is electrically connected with public electrode 03, particularly, can metallic signal lines be transmitted electric signal with corresponding electrode electric connection by via hole.
For being connected of touching signals input line 052 and touch-control drive electrode 02 can be shown in the synoptic diagram more clearly, the width of the capable touch-control drive electrode 02 of n is slightly less than the width of touch-control drive electrode 02 in the capable touch control unit of n+1 among Fig. 3.More excellent, the width of adjacent lines touch-control drive electrode 02 also can be arranged to unanimously can guarantee the resistance consistance like this, and can not increase complexity on the technique that the touch-control accuracy is higher.
Further, enlarged diagram such as C place among Fig. 3 is shown in Figure 7, Tx1, Tx2, Tx3 are with shown in the Tx4 in adjacent lines touch-control drive electrode 02(Fig. 7) width be arranged to when consistent, the touching signals input line 052 that is connected with each touch-control drive electrode 02 can be arranged to broken line shape as shown in Figure 7, and, use bridged-style to avoid signal cross-talk in touching signals input line 052 and the data signal line intersection region of broken line shape.Corresponding, because the width of adjacent touch-control drive electrode 02 is consistent, therefore, the width of public electrode 03 is also consistent up and down, the resistance value of the public electrode 03 that width is consistent is relatively even, farthest reduces the time delay of signal transmission; And, the shape of the common electrode signal input line 053 that is connected with public electrode 03 can be arranged to " mountain " font as shown in Figure 7, those skilled in the art as can be known, Fig. 7 has illustrated the wire laying mode of individual metallic signal lines, in the specific implementation, can require the shape of metallic signal lines is improved according to actual design, be not limited to mode shown in Figure 7.
Further, because common electrode layer is generally made by transparent electrode material such as ITO material, further in order to reduce to greatest extent the resistance of common electrode layer, improve the signal to noise ratio (S/N ratio) of each electrodes transfer electric signal, enlarged drawing such as B place among Fig. 3 is shown in Figure 4, touch-control drive electrode 02 can be electrical connected by a plurality of via holes with corresponding touching signals input line 052; Touch-control sensing electrode 01 is electrical connected by a plurality of via holes with corresponding touching signals output line 051; Public electrode 03 is electrical connected by a plurality of via holes with corresponding common electrode signal input line 053.Namely be equivalent to ITO electrode and a plurality of metallic resistance parallel connection that is comprised of signal wire can be reduced the resistance of electrode so to greatest extent, thus the signal to noise ratio (S/N ratio) when improving the electrodes transfer signal.
And, as shown in Figure 5, can also will mutually be electrically connected with each metal touch-control electrode 061 and each touching signals input line 051 that same touch-control drive electrode 01 is electrical connected; Mutually be electrically connected with each metal induction electrode 062 and each touching signals output line 052 that same touch-control sensing electrode 02 is electrical connected; Mutually be electrically connected with each metal public electrode 063 and each common electrode signal input line 053 that same public electrode 03 is electrical connected.Like this, metal driving electrode 061, metal induction electrode 062 and metal public electrode 063 can further reduce the time delay of signal transmission all with electric signal.
Based on same utility model design, the utility model embodiment also provides a kind of display device, comprise the embedded touch-screen of above-mentioned condenser type that the utility model embodiment provides, the enforcement of this display device can referring to the embodiment of the embedded touch-screen of above-mentioned condenser type, repeat part and repeat no more.
The embedded touch-screen of a kind of condenser type and display device that the utility model embodiment provides, the common electrode layer of whole connection in the tft array substrate is cut apart, form touch-control sensing electrode and the touch-control drive electrode of mutually insulated, touch-control drive electrode and touch-control sensing electrode are carried out the timesharing driving, to realize touch controllable function and Presentation Function.Because being the common electrode layer structure to tft array substrate, the touch-screen that provides of the utility model embodiment changes to realize touch controllable function, therefore, on existing tft array substrate preparation technology's basis, do not need to increase extra technique and namely can be made into touch-screen, save production cost, improved production efficiency.And, owing to adopt timesharing to drive touch-control and Presentation Function, also can reduce the phase mutual interference, improve picture quality and touch-control accuracy.
In addition, because touch-control drive electrode and touch-control sensing electrode have common electrode layer in the demonstration stage effect, therefore, each touch-control drive electrode and each touch-control sensing electrode are usually by higher the preparing such as ITO or IZO material of resistance, produce easily the problem of signal time delay when transmitting touching signals in the demonstration stage, and in the touch-screen that the utility model embodiment provides, in order to reduce the resistance of each touch-control drive electrode and/or touch-control sensing electrode, reduce signal time delay, in tft array substrate, be provided with the many strip metals drive electrode that is electrical connected with each touch-control drive electrode, and the many strip metals induction electrode that is electrical connected with each touch-control sensing electrode, reduced greatly the resistance of touch-control drive electrode and touch-control sensing electrode, and these metal driving electrodes and metal induction electrode are between the pixel cell of adjacent lines, also can not take the open area of touch-screen, thereby guarantee the aperture opening ratio that touch-screen is required.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.
Claims (14)
1. the embedded touch-screen of condenser type comprises the tft array substrate with common electrode layer, is provided with to be a plurality of pixel cells that matrix is arranged in described tft array substrate, it is characterized in that,
Described common electrode layer has touch-control sensing electrode and the touch-control drive electrode of mutually insulated; In the displaying time section, described touch-control drive electrode and described touch-control sensing electrode are applied common electrode signal; In the touch-control time period, described touch-control drive electrode is applied touch scanning signals, described touch-control sensing electrode is for voltage signal and the output of the described touch scanning signals that is coupled;
Described tft array substrate has many strip metals drive electrode and/or the many strip metals induction electrode that extends along the line direction of pixel cell, the gap location of described metal driving electrode between the pixel cell of adjacent lines, and be electrical connected with corresponding described touch-control drive electrode; The gap location of described metal induction electrode between the pixel cell of adjacent lines, and be electrical connected with corresponding described touch-control sensing electrode.
2. touch-screen as claimed in claim 1 is characterized in that, the data signal line in the described metal driving electrode of each bar and the described tft array substrate or signal line arrange and mutually insulated with layer;
Data signal line in the described metal induction electrode of each bar and the described tft array substrate or signal line arrange and mutually insulated with layer.
3. touch-screen as claimed in claim 1 is characterized in that, the described metal driving electrode of each bar is positioned at upper strata and/or the lower floor of described touch-control drive electrode;
Each strip metal induction electrode is positioned at upper strata and/or the lower floor of described touch-control sensing electrode.
4. touch-screen as claimed in claim 1 is characterized in that, described touch-control sensing electrode extends along the column direction of the pixel cell of tft array substrate; Described touch-control drive electrode extends along the line direction of the pixel cell of tft array substrate.
5. touch-screen as claimed in claim 1 is characterized in that, described touch-control drive electrode and described touch-control sensing electrode have strip shaped electric poles structure, Rhombus electrode structure or insert the finger electrode array configurations.
6. such as each described touch-screen of claim 1-5, it is characterized in that, has public electrode at the gap location of described common electrode layer between described touch-control sensing electrode and described touch-control drive electrode, described public electrode and described touch-control sensing electrode and touch-control drive electrode mutually insulated.
7. touch-screen as claimed in claim 6, it is characterized in that, also comprise: the many strip metals public electrode that is electrical connected with corresponding public electrode, the gap location of described metal public electrode between the pixel cell of adjacent lines arranges and mutually insulated with layer with described metal induction electrode or described metal driving electrode.
8. touch-screen as claimed in claim 6 is characterized in that, described touch-control sensing electrode, described touch-control drive electrode and the described public electrode position corresponding with the open area of pixel cell have slit-shaped transparency electrode or tabular transparent electrode structure.
9. touch-screen as claimed in claim 6 is characterized in that, the edge of described common electrode layer has the common electrical polar ring that surrounds described public electrode, described touch-control sensing electrode and described touch-control drive electrode.
10. touch-screen as claimed in claim 7, it is characterized in that, between the pixel cell of described tft array substrate adjacent lines, have two signal lines, and be listed as take two adjacent row pixel cells as one group of pixel cell, every group of pixel cell row share the data signal line between this two row pixel cell.
11. touch-screen as claimed in claim 10 is characterized in that, the gap location between adjacent sets pixel cell row also has the metallic signal lines that arranges with layer with data signal line; Described metallic signal lines specifically comprises: touching signals input line, touching signals output line and common electrode signal input line, wherein,
Described touching signals input line is electrically connected with described touch-control drive electrode; Described touching signals output line is electrically connected with described touch-control sensing electrode; The common electrode signal input line is electrically connected with described public electrode.
12. touch-screen as claimed in claim 11 is characterized in that, described touch-control drive electrode is electrical connected by a plurality of via holes with corresponding described touching signals input line; Described touch-control sensing electrode is electrical connected by a plurality of via holes with corresponding described touching signals output line; Described public electrode is electrical connected by a plurality of via holes with corresponding described common electrode signal input line.
13. touch-screen as claimed in claim 11 is characterized in that, mutually is electrically connected with each metal touch-control electrode and each touching signals input line that same touch-control drive electrode is electrical connected; Mutually be electrically connected with each metal induction electrode and each touching signals output line that same touch-control sensing electrode is electrical connected; Mutually be electrically connected with each metal public electrode and each common electrode signal input line that same public electrode is electrical connected.
14. a display device is characterized in that, comprises such as the embedded touch-screen of each described condenser type of claim 1-13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220568932 CN202870793U (en) | 2012-10-31 | 2012-10-31 | Capacitance-type embedded touch screen and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220568932 CN202870793U (en) | 2012-10-31 | 2012-10-31 | Capacitance-type embedded touch screen and display device |
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| Publication Number | Publication Date |
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| CN202870793U true CN202870793U (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220568932 Expired - Lifetime CN202870793U (en) | 2012-10-31 | 2012-10-31 | Capacitance-type embedded touch screen and display device |
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| CN (1) | CN202870793U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014190736A1 (en) * | 2013-05-31 | 2014-12-04 | 京东方科技集团股份有限公司 | Built-in touch screen and display device |
| WO2015100809A1 (en) * | 2013-12-30 | 2015-07-09 | 深圳市华星光电技术有限公司 | Dual-gate panel embedded touch device |
| WO2016145682A1 (en) * | 2015-03-18 | 2016-09-22 | 深圳市华星光电技术有限公司 | Touch display panel and touch display device |
| CN106371661A (en) * | 2016-08-29 | 2017-02-01 | 武汉华星光电技术有限公司 | Array substrate and touch display panel |
| CN107256106A (en) * | 2017-07-26 | 2017-10-17 | 武汉天马微电子有限公司 | Array base palte, liquid crystal display panel, touch control display apparatus and touch-control driving method |
-
2012
- 2012-10-31 CN CN 201220568932 patent/CN202870793U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014190736A1 (en) * | 2013-05-31 | 2014-12-04 | 京东方科技集团股份有限公司 | Built-in touch screen and display device |
| US9645665B2 (en) | 2013-05-31 | 2017-05-09 | Boe Technology Group Co,, Ltd. | In-cell touch panel and display device |
| WO2015100809A1 (en) * | 2013-12-30 | 2015-07-09 | 深圳市华星光电技术有限公司 | Dual-gate panel embedded touch device |
| WO2016145682A1 (en) * | 2015-03-18 | 2016-09-22 | 深圳市华星光电技术有限公司 | Touch display panel and touch display device |
| CN106371661A (en) * | 2016-08-29 | 2017-02-01 | 武汉华星光电技术有限公司 | Array substrate and touch display panel |
| CN106371661B (en) * | 2016-08-29 | 2020-03-17 | 武汉华星光电技术有限公司 | Array substrate and touch display panel |
| CN107256106A (en) * | 2017-07-26 | 2017-10-17 | 武汉天马微电子有限公司 | Array base palte, liquid crystal display panel, touch control display apparatus and touch-control driving method |
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