CN102073402A - Touch display device - Google Patents
Touch display device Download PDFInfo
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- CN102073402A CN102073402A CN2009103101380A CN200910310138A CN102073402A CN 102073402 A CN102073402 A CN 102073402A CN 2009103101380 A CN2009103101380 A CN 2009103101380A CN 200910310138 A CN200910310138 A CN 200910310138A CN 102073402 A CN102073402 A CN 102073402A
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Abstract
The invention provides a touch display device. The device comprises a touch display panel and a signal processing circuit, wherein the touch display panel comprises a plurality of scan lines, a plurality of data lines, a plurality of pixel units and a public electrode layer; the plurality of pixel units form a plurality of touch sensing units each of which comprises a touch sensing element, the touch sensing element is connected to the corresponding scan line on the one hand, and is connected to the signal processing circuit through the touch sensing line on the other hand so as to provide a touch sensing signal to the signal processing circuit when the touch sensing element is touched by external force; a public voltage signal is applied to the public electrode layer, is a polarity reversal signal, and comprises a first polarity and a second polarity opposite to the first polarity; and when high voltage is applied to the scan line connected with the touch sensing element, and the public voltage signal of the public electrode layer is the first polarity, the signal processing circuit reads the signal on the touch sensing line.
Description
Technical field
The present invention relates to a kind of touch control display apparatus, particularly a kind of embedded touch display device.
Background technology
Reduction day by day along with the flourish and manufacturing cost of flat panel display, panel display apparatus with advantages such as radiation are low, thickness is little, low in energy consumption more and more is subjected to consumer's favor, therefore be widely used in electronic product, such as mobile phone, game machine, palm PC etc.As a rule, panel display apparatus mainly comprises plasma display system (PDP), liquid crystal indicator (LCD) and organic electroluminescent LED display device (OLED) etc.Wherein, liquid crystal indicator becomes the flat display apparatus of main flow in the market gradually owing to have cheap relatively cost.
In order to meet the modern, release various panel display apparatus, i.e. touch control display apparatus in recent years on the market gradually with touch controllable function for convenient more, the needs of man-machine interface more intuitively.Touch control display apparatus generally can be divided into external and embedded two kinds.Wherein, the embedded touch display device is that touch sensing element directly is produced among the display panels, thereby realizes the integrated of contact panel and display panels.The embedded touch display device can reduce the integral thickness of touch control display apparatus on the one hand, owing to need not additionally to increase processing step in manufacture process, can reduce manufacturing cost on the other hand.
In the embedded touch display device course of work, the user can carry out operations by clicking its picture displayed.Particularly, when the user touches a certain position of display frame by finger or pointer, the embedded touch control sensing element of this position correspondence can detect and respond described user's touch-control action, exports an induced signal and provides control circuit to the outside by a touch induction lines.This control circuit can further be judged the position of described user's touch-control action indication according to described induced signal, thereby know the operation that described user is performed, and provide corresponding control signal to control described touch control display apparatus or to use the electronic product of described touch control display apparatus to operate accordingly.
In the embedded touch display device of prior art, this touch sensing element and corresponding touch induction lines are directly to be produced on display panels inside, and then have liquid crystal capacitance between the public electrode of this display panels and this touch induction lines.Yet, this display panels generally adopts the inversion driving method, the polarity that is applied to the common electric voltage of its public electrode is constantly to change, because the existence of this liquid crystal capacitance, this touch induction lines can be subjected to the influence of this common electric voltage when transmitting induced signal to correspondent control circuits, cause same induced signal to read and to obtain different results, cause the signal read error, and then cause misoperation in the different periods.Therefore, the stability of embedded touch display device of the prior art and reliability are lower.
Summary of the invention
One of purpose of the present invention provides a kind of touch control display apparatus that misoperation takes place that reduces.
A kind of touch control display apparatus, it comprises a touch-control display panel and a signal processing circuit, this touch-control display panel comprises the multi-strip scanning line, many data lines, a plurality of by this sweep trace and a crossing pixel cell and the common electrode layer that defines of data line, these a plurality of pixel cells are formed a plurality of touch-control sensings unit, each touch-control sensing unit comprises a touch sensing element, this touch sensing element is connected to corresponding one scan line on the one hand, be connected to this signal processing circuit when being subjected to the external force touch-control, to provide a touch-control sensing signal by a touch induction lines on the other hand to this signal processing circuit, this common electrode layer is applied in a public voltage signal, this public voltage signal is a polarity inversion signal, it comprises one first polarity and one and this first opposite polarity second polarity, the public voltage signal that the sweep trace that connects when this touch sensing element is applied in high voltage and this common electrode layer is first polarity chron, and this signal processing circuit reads the signal on this touch induction lines.
In the touch control display apparatus of the present invention, this signal processing unit is to be that first polarity chron reads and handles the touch-control sensing signal on this touch induction lines in public voltage signal polarity, avoid appearing at that the public voltage signal positive-negative polarity all reads the touch-control sensing signal and the maloperation phenomenon that causes makes that this touch control display apparatus reliability is higher.
Description of drawings
Fig. 1 is the circuit diagram of touch control display apparatus first embodiment of the present invention.
Fig. 2 is the part side structure synoptic diagram of touch control display apparatus shown in Figure 1.
Fig. 3 is the synoptic diagram of a reading unit of the signal read circuits of touch control display apparatus shown in Figure 1.
Fig. 4 is the drive signal waveform figure of touch control display apparatus shown in Figure 1.
Fig. 5 is the circuit diagram of touch control display apparatus second embodiment of the present invention.
Fig. 6 is the drive signal waveform figure of touch control display apparatus shown in Figure 5.
Fig. 7 is the circuit diagram of touch control display apparatus the 3rd embodiment of the present invention.
Fig. 8 is the drive signal waveform figure of touch control display apparatus shown in Figure 7.
Fig. 9 is the circuit diagram of touch control display apparatus the 4th embodiment of the present invention.
Figure 10 is the part side structure synoptic diagram of touch control display apparatus shown in Figure 9.
Figure 11 is the synoptic diagram of a reading unit of the signal read circuits of touch control display apparatus shown in Figure 9.
Figure 12 is the drive signal waveform figure of touch control display apparatus shown in Figure 9.
Figure 13 is the circuit diagram of touch control display apparatus the 5th embodiment of the present invention.
Figure 14 is the drive signal waveform figure of touch control display apparatus shown in Figure 13.
Figure 15 is the circuit diagram of touch control display apparatus the 6th embodiment of the present invention.
Figure 16 is the drive signal waveform figure of touch control display apparatus shown in Figure 15.
Embodiment
See also Fig. 1, it is the circuit diagram of touch control display apparatus first embodiment of the present invention.This touch control display apparatus 100 is the embedded touch display device, and it comprises a touch-control display panel 110, scan driving circuit 120, a data drive circuit 130, a signal processing circuit 140 and a control circuit 150.
This touch-control display panel 110 can be display panels, it sweep trace G0～Gm, n bar that comprises that the m+1 bar be arranged in parallel be parallel to each other and with the vertically insulated crossing data line D1～Dn of this sweep trace G0～Gm, and m * n forms and be the pixel cell Pij of matrix distribution by this sweep trace G1～Gm and data line D1～Dn definition, and (wherein i, j represent that respectively described pixel cell is positioned at the capable and j row of i of this matrix, 1≤i≤m, 1≤j≤n).Each pixel cell Pij comprises a thin film transistor (TFT) 111 and a pixel electrode 112 respectively.Wherein, (1≤i≤m) is connected to this scan drive circuit 120 to the grid of this thin film transistor (TFT) 111 by its corresponding scanning line Gi, (1≤j≤n) is connected to this data drive circuit 130 to its source electrode, and its drain electrode is connected to this pixel electrode 112 by its corresponding data line Dj.And, this touch-control display panel 110 also comprises a common electrode layer 116 that is made of a plurality of public electrodes 116, each public electrode 116 respectively corresponding pixel cell, and in each pixel cell, this pixel electrode 112, this public electrode 116 and be clipped in this liquid crystal layer between the two and form a liquid crystal capacitance 115.
In this touch-control display panel 110, described m * n the pixel cell that is matrix distribution can be divided into a plurality of touch-control sensings unit 119.This a plurality of touch-control sensings unit 119 also is matrix distribution.In the present embodiment, as shown in Figure 1, p * q pixel cell can be formed a touch-control sensing unit 119, wherein p=3, q=2, and promptly each touch-control sensing unit 119 comprises 3 * 2 pixel cells respectively.And, these 3 * 2 pixel cells can be divided into one first subelement 119a and the one second subelement 119b that is positioned at adjacent lines, and each subelement comprises 3 * 1 pixel cells respectively, and these 3 * 1 pixel cells are respectively red (R), green (G), blue (B) pixel cell.Be to be understood that, above structure only is an embodiment of the present invention, in other alternate embodiments, p and q can also get other values respectively, and those skilled in the art can know that according to the content of this instructions the structure needs of this touch-control display panel 110 when p, q get other values correspondingly adjust.
For ease of describing, below to lay respectively at i capable and i+1 is capable for supposition this first subelement 119a and this second subelement 119b.Each touch-control sensing unit 119 comprises a touch sensing element 109.This touch sensing element 109 is preferably disposed among this first subelement 119a, and particularly, this touch sensing element 109 can be arranged among this first subelement 119a in any pixel cell.This touch sensing element 109 is used for providing a touch-control sensing signal by the touch induction lines 114 of correspondence to this signal processing circuit 140.In the present embodiment, i is an odd number, and this touch sensing element 109 is connected to sweep trace Gi-1, simultaneously, also is connected to this signal processing circuit 140 by a touch induction lines 114.In addition, all touch sensing elements 109 that are positioned at a plurality of touch-control sensings unit 119 of same row are connected to this signal processing circuit 140 by same touch induction lines 114.In fact, in the present embodiment, these a plurality of touch sensing elements 109 are the pixel cells that are arranged in odd-numbered line.
See also Fig. 2, it is the part side structure synoptic diagram of the touch-control sensing unit 119 in the described touch-control display panel 110.In each touch-control sensing unit 119, this touch sensing element 109 comprises that one is arranged on colored filter (Color Filter, CF) substrate and be arranged on thin film transistor (TFT) (Thin Film Transistor, TFT) substrate and touch-control electrode 122 and an on-off element 123 relative with described projection 121 by the projection 121, that above-mentioned common electrode layer 116 covers.This on-off element 123 has a control end 1231, and whether this control end 1231 can be applied conducting or the cut-off state that the touch-control action determines this on-off element 123 by the user according to this touch-control sensing unit 119.Particularly, in the present embodiment, this on-off element 123 can have a thin-film transistor structure, and the grid of this thin film transistor (TFT) is as this control end, its grid extends to described touch-control electrode 122 and contacts with this touch-control electrode, its source electrode is connected to described sweep trace Gi-1, and its drain electrode is connected to described touch induction lines 114.When external force acts on this touch-control sensing unit 119, this projection 121 can make under described external force effect and cover its surperficial common electrode layer 116 butts to this touch-control electrode 122, thereby the common electric voltage of carrying on this common electrode layer 116 is applied to the grid of this on-off element 123 so that 123 conductings of this on-off element, at this moment, this on-off element 123 just its source electrode can be received from the sweep signal of this sweep trace Gi-1 as the touch-control sensing signal, and offer this signal processing circuit 140 by this touch induction lines 114.
See also Fig. 3, this signal processing circuit 140 comprises a plurality of signal processing units 141.Each signal processing unit 141 corresponds respectively to a row touch-control sensing unit 119, and is connected to the touch induction lines 114 of these row touch-control sensing unit 119 correspondences, is used for the signal that transmits by its corresponding touch induction lines 114 is handled.Particularly, this signal processing unit 141 comprises a controlled switch 142, a signal memory cell 144 and a comparator circuit 146.These controlled switch 142 1 ends are connected to this touch induction lines 114, and the other end is connected to this comparator circuit 146 by this signal memory cell 144.This controlled switch 142 can conducting and disconnection under these touch control display apparatus 100 inner sequential control, whether reads touch-control sensing signal on this touch induction lines 114 with decision.This comparator circuit 146 can comprise the comparer of a differential amplifier structure, and it has a homophase input end, an inverting input and an output terminal.This in-phase input end connects this signal memory cell 144, to receive this touch-control sensing signal.This inverting input is transfused to a reference voltage.This output terminal is connected to this control circuit 150.This signal memory cell 144 can comprise a parallel memory capacitance 147 and a switch 148 that connects.
See also Fig. 4, it is the drive signal waveform figure of touch control display apparatus 100 shown in Figure 1.Wherein, on behalf of this scan drive circuit 120, G0～Gm be applied to a plurality of sweep signals on sweep trace G0～Gm respectively; Vd represents the data-signal on any data line among D1～Dn; Public voltage signal on Vcom these a plurality of public electrodes 116 of representative (i.e. this common electrode layer 116); Vr represents the conducting and the closing timing of this controlled switch 142, and the high level period of Vr represent this controlled switch 142 conductings, on behalf of this controlled switch 142, the low level period of Vr disconnect.
These a plurality of sweep signals come down to a series of high level pulses, usually, the timing definition that this multi-strip scanning line G0～Gm is all applied a high level pulse in regular turn is a frame (frame) image time, and any time in a frame time, have only a sweep trace Gi-1 to be applied in this high voltage pulse.In this multi-strip scanning line G0～Gm is applied a frame image time of high voltage pulse in regular turn, a plurality of data-signals of the representative one frame picture that this data drive circuit 130 is exported in regular turn are respectively by many data line D1～Dn, a plurality of thin film transistor (TFT)s 111 are written into each pixel electrode 112, simultaneously, this public voltage signal is written into this a plurality of public electrodes 116, and then all pixel cells that make this touch control display apparatus 100 are all realized once showing, this touch control display apparatus 100 shows a frame picture, operation principles one of ordinary skill in the art of this part all can be understood, and therefore just repeats no more.Wherein, this public voltage signal is a polarity inversion signal, and it fluctuates a reference value, can set its reference value and amplitude range according to actual needs, as: reference value is 3V, and amplitude range is that 1V is to 5V; Perhaps reference value is 0V, and amplitude range is-and 3V is to 3V.
Following mask body is introduced the reading and processing procedure of touch-control sensing signal of this touch control display apparatus 100:
As shown in Figure 4, in N frame image time, the sweep trace Gi-1 that is connected when this touch-control sensing unit 119 receives the T of sweep signal in the period (in the present embodiment, i is an odd number), and these a plurality of public electrodes 116 are applied in the public voltage signal that a polarity is positive high level.Further, suppose that this T is in the period, the user moves when carrying out a certain operation to apply a touch-control when touch control display apparatus 100 by finger or pointer etc., and the corresponding touch-control sensing unit 119 that connects this sweep trace Gi-1, position (hereinafter to be referred as position of touch) that described touch-control action is pointed, this touch-control sensing unit 119 will receive the external force that is produced by this touch-control action, in this case, projection 121 in this touch sensing element 109 makes under this external force effect and covers its surperficial common electrode layer 116 butts to this touch-control electrode 122, thereby will carry to such an extent that common electric voltage is applied to the grid of this on-off element 123, these on-off element 123 conductings thus on this common electrode layer 116.This on-off element 123 exports this sweep signal to signal processing unit 141 corresponding in this signal processing circuit 140 as the touch-control sensing signal and by this touch induction lines 114, and, at this moment, according to Vr as can be known, controlled switch 142 conductings in this signal processing unit 141, make this signal processing unit 141 to read to the touch-control sensing signal of this touch induction lines 114, specifically, this touch-control sensing signal stores by the memory capacitance 147 that this controlled switch 142 is admitted in this signal memory cell 144, this comparator circuit 146 is according to relatively this touch-control sensing signal and this reference voltage signal, export a touch-control and control signal to this control circuit 150, judge the coordinate of this position of touch for this control circuit 150.This control circuit 150 can be known the particular content of the operation that the user is performed according to the coordinate of judging, and provides control signal corresponding to control this touch control display apparatus 100 or use the electronic product of this touch control display apparatus 100 to operate accordingly.
Further, when next bar sweep trace Gi receives the T of sweep signal in the period, these a plurality of public electrodes 116 are applied in a polarity and are negative low level public voltage signal, owing on this sweep trace Gi touch sensing element is not set, controlled switch 142 in this signal processing unit 141 disconnects, and this signal processing unit 141 does not read the touch-control sensing signal on this touch induction lines 114.
In N+1 frame image time, the sweep trace Gi-1 that is connected when this touch-control sensing unit 119 receives the T of sweep signal in the period, because of needing these a plurality of public electrodes 116 to be applied in a polarity, reversal of poles is negative low level public voltage signal, at this moment, according to Vr as can be known, controlled switch 142 in this signal processing unit 141 disconnects, and this signal processing unit 141 does not read the touch-control sensing signal of this touch induction lines 114.When next bar sweep trace Gi receives the T of sweep signal in the period, owing on this sweep trace Gi touch sensing element is not set, controlled switch 142 in this signal processing unit 141 still disconnects, and this signal processing unit 141 does not read the touch-control sensing signal of this touch induction lines 114.
According to as can be known above-mentioned, in the present embodiment, in N+1 frame image time, the controlled switch 142 in this signal processing unit 141 disconnects, and this signal processing unit 141 does not read and handles the touch-control sensing signal of this touch induction lines 114.
In N+2 frame image time, the operation steps of this touch control display apparatus 100 and this N frame image time are basic identical, specific as follows: the T that the sweep trace Gi-1 that is connected when this touch-control sensing unit 119 receives sweep signal is in the period, is applied in the public voltage signal that a polarity is positive high level because of reversal of poles needs these a plurality of public electrodes 116.At this moment, the user moves when carrying out a certain operation to apply a touch-control when touch control display apparatus 100 by finger or pointer etc., and the corresponding touch-control sensing unit 119 that connects this sweep trace Gi-1 of described position of touch, these on-off element 123 conductings, and export in this signal processing circuit 140 this sweep signal to corresponding signal processing unit 141 as the touch-control sensing signal and by this touch induction lines 114, and this moment, according to Vr as can be known, controlled switch 142 conductings in this signal processing unit 141 make this signal processing unit 141 to read and to handle the touch-control sensing signal of this touch induction lines 114.When next bar sweep trace Gi receives the T of sweep signal in the period, this public electrode 116 is applied in a polarity and is negative low level public voltage signal, owing on this sweep trace Gi touch sensing element is not set, controlled switch 142 in this signal processing unit 141 disconnects, and this signal processing unit 141 does not read the touch-control sensing signal of this touch induction lines 114.
After the N+2 frame, this touch control display apparatus 100 can repeat each step and the action of this N+1 frame, N+2 frame, repeats no more herein.
In the touch control display apparatus 100 of the present invention, controlled switch 142 in this signal processing unit 141 is when the sweep trace Gi-1 that is connected with touch sensing element 109 receives sweep signal, and this public voltage signal polarity is the timing conducting, and then this signal processing unit 141 is to be that timing is read and handled the touch-control sensing signal on this touch induction lines 114 in public voltage signal polarity, avoid appearing at that the public voltage signal positive-negative polarity all reads the touch-control sensing signal and the maloperation phenomenon that causes, make this touch control display apparatus can 100 higher by property.
See also Fig. 5, Fig. 5 is the circuit diagram of touch control display apparatus second embodiment of the present invention.The key distinction of the touch control display apparatus 200 of this second embodiment and the touch control display apparatus 100 of first embodiment is: to lay respectively at i capable (in the present embodiment as this first subelement 219a and this second subelement 219b, i is an odd number) and i+1 capable, then the touch sensing element 209 of each touch-control sensing unit 219 is arranged among the second subelement 219b in any pixel cell, simultaneously, this touch sensing element 209 is connected to i bar sweep trace Gi, also is connected to this signal processing circuit 240 by a touch induction lines 214.
See also Fig. 6, it is the drive signal waveform figure of touch control display apparatus 200 shown in Figure 5.According to Fig. 6 as can be known, when these touch control display apparatus 200 work, controlled switch in this signal processing unit 241 is when the sweep trace Gi that is connected with touch sensing element 209 receives sweep signal, and conducting when this public voltage signal polarity is negative, and then this signal processing unit 241 is the touch-control sensing signal on this touch induction lines 241 to be read and handles when negative in public voltage signal polarity, avoid appearing at that the public voltage signal positive-negative polarity all reads the touch-control sensing signal and the maloperation phenomenon that causes makes that these touch control display apparatus 200 reliabilities are higher.
See also Fig. 7, it is the circuit diagram of touch control display apparatus the 3rd embodiment of the present invention.The key distinction of the touch control display apparatus 300 of the 3rd embodiment and the touch control display apparatus 100 of first embodiment is: in this touch-control display panel 310, p * q pixel cell formed a touch-control sensing unit 319, wherein p=3, q=1, promptly each touch-control sensing unit 319 comprises 3 * 1 pixel cells respectively.Each touch-control sensing unit 319 includes a touch sensing element 309, and this touch sensing element 309 can be arranged in any pixel cell of this touch-control sensing unit 319, and this touch sensing element 309 is connected to corresponding one scan line, simultaneously, also be connected to this signal processing circuit 340 by a touch induction lines 314.In fact, in the present embodiment, these a plurality of touch sensing elements 309 are the pixel cells that are arranged in even number line.
See also Fig. 8, it is the drive signal waveform figure of touch control display apparatus 300 shown in Figure 7.Introduce reading and processing procedure of touch-control sensing signal in this touch control display apparatus 300 according to Fig. 8 below.
In N frame image time, the T that this sweep trace Gi-1 (in the present embodiment, i is an odd number) receives sweep signal is in the period, and this public electrode 314 also is applied in the public voltage signal that a polarity is positive high level.At this moment, the user moves when carrying out a certain operation to apply a touch-control when touch control display apparatus 300 by finger or pointer etc., and the corresponding touch-control sensing unit 319 that connects this sweep trace Gi-1 of described position of touch, these on-off element 323 conductings, and export in this signal processing circuit 340 this sweep signal to corresponding signal processing unit 341 as the touch-control sensing signal and by this touch induction lines 314, and this moment, according to Vr as can be known, controlled switch conducting in this signal processing unit 341 makes this signal processing unit 341 to read and to handle the touch-control sensing signal of this touch induction lines 314.
In N+1 frame image time, the T that this sweep trace Gi (i is an odd number) receives sweep signal is in the period, and this public electrode 314 also is applied in the public voltage signal that a polarity is positive high level.At this moment, the user moves when carrying out a certain operation to apply a touch-control when touch control display apparatus 300 by finger or pointer etc., and the corresponding touch-control sensing unit 319 that connects this sweep trace Gi-1 of described position of touch, these on-off element 323 conductings, and export in this signal processing circuit 340 this sweep signal to corresponding signal processing unit 341 as the touch-control sensing signal and by this touch induction lines 314, and this moment, according to Vr as can be known, controlled switch conducting in this signal processing unit 341 makes this signal processing unit 341 to read and to handle the touch-control sensing signal of this touch induction lines 314.
After this N+1 frame, this touch control display apparatus 300 can repeat each step and the action of this N frame, N+1 frame, repeats no more herein.
Compared with prior art, in N frame image time, controlled switch in this signal processing unit 341 is when this sweep trace Gi-1 receives sweep signal, and this public voltage signal polarity is the timing conducting, makes that this signal processing unit 341 can be that timing is read and handled the touch-control sensing signal on this sweep trace Gi-1 in public voltage signal polarity; Further, in N+1 frame image time, controlled switch 342 in this signal processing unit 341 is when this sweep trace Gi receives sweep signal, and this public voltage signal polarity is the timing conducting, makes that this signal processing unit 341 can be that timing is read and handled the touch-control sensing signal on this sweep trace Gi in public voltage signal polarity; Promptly, in the two continuous frames image time, and this public voltage signal polarity is timing, the touch-control sensing signal of the touch sensing element 309 that this touch control display apparatus 300 can connect all sweep traces reads and handles, avoid appearing at that the public voltage signal positive-negative polarity all reads the touch-control sensing signal and the maloperation phenomenon that causes makes that these touch control display apparatus 300 reliabilities are higher.
In addition, this touch control display apparatus 300 all reads touch-control sensing signal and coupled signal at every frame image time, and than the touch control display apparatus 100 and the 200 reading frequency height of first, second embodiment, and then the sensitivity of this touch control display apparatus 300 is higher.
See also Fig. 9, it is the circuit diagram of touch control display apparatus the 4th embodiment of the present invention.This touch control display apparatus 400 is the embedded touch display device, and it comprises a touch-control display panel 410, scan driving circuit 420, a data drive circuit 430, a signal processing circuit 440 and a control circuit 450.
This touch-control display panel 410 can be display panels, it sweep trace G0～Gm, n bar that comprises that the m+1 bar be arranged in parallel is parallel to each other and perpendicular to data line D1～Dn of this sweep trace G0～Gm, and m * n forms and be the pixel cell Pij of matrix distribution by this sweep trace G1～Gm and data line D1～Dn definition, and (wherein i, j represent that respectively described pixel cell is positioned at the capable and j row of i of this matrix, 1≤i≤m, 1≤j≤n).Each pixel cell Pij comprises a thin film transistor (TFT) 411 and a pixel electrode 412 respectively.Wherein, (1≤i≤m) is connected to this scan drive circuit 420 to the grid of this thin film transistor (TFT) 411 by its corresponding scanning line Gi, (1≤j≤n) is connected to this data drive circuit 430 to its source electrode, and its drain electrode is connected to this pixel electrode 412 by its corresponding data line Dj.And, this touch-control display panel 410 also comprises a common electrode layer that is made of these a plurality of public electrodes 416, each public electrode 416 respectively corresponding pixel cell, and in each pixel cell, this pixel electrode 412, this public electrode 416 and be clipped in this liquid crystal layer between the two and form a liquid crystal capacitance 415.
In this touch-control display panel 410, described m * n the pixel cell that is matrix distribution can be divided into a plurality of touch-control sensings unit 419 and a plurality of inductive couplings unit 418.This a plurality of touch-control sensings unit 419 and a plurality of inductive couplings unit 418 can be matrix distribution.In the present embodiment, p * q pixel cell can be formed a touch-control sensing unit 419, p * q pixel cell can be formed an inductive coupling unit 418, wherein p=3, q=2, and promptly each touch-control sensing unit 419 and each inductive coupling unit 418 comprise 3 * 2 pixel cells respectively.And, 3 * 2 pixel cells of each touch-control sensing unit 419 can be divided into one first subelement 419a and the one second subelement 419b that is positioned at adjacent lines, and each subelement 419a or 419b comprise 3 * 1 pixel cells respectively, and these 3 * 1 pixel cells are respectively red (R), green (G), blue (B) pixel cell; 3 * 2 pixel cells of each inductive coupling unit 418 can be divided into one first subelement 418a and the one second subelement 418b that is positioned at adjacent lines, and each subelement 418a or 418b comprise 3 * 1 pixel cells respectively, and these 3 * 1 pixel cells are respectively red (R), green (G), blue (B) pixel cell.In the present embodiment, this touch-control sensing unit 419 and inductive coupling unit 418 are adjacent settings, and specifically, each is listed as this touch-control sensing unit 419 and inductive coupling unit 418 can the alternate intervals setting.
For ease of describing, below to be positioned at i capable and i+1 is capable for the first subelement 419a of this touch-control sensing unit 419 of supposition and the second subelement 419b, and it is capable and i+3 is capable that the first subelement 418a of this inductive coupling unit 418 and the second subelement 418b are positioned at i+2.Each touch-control sensing unit 419 comprises a touch sensing element 409, this touch sensing element 409 is preferably disposed in the pixel cell of this first subelement 419a, this touch sensing element 409 is connected to sweep trace Gi-1 simultaneously, simultaneously, also be connected to this signal processing circuit 440 by a touch induction lines 414.Each inductive coupling unit 418 comprises an inductive coupling element 408, this inductive coupling element 408 is preferably disposed in the pixel cell of this first subelement 418a, this inductive coupling element 408 is connected to sweep trace Gi+1 simultaneously, simultaneously, also be connected to this signal processing circuit 440 by this touch induction lines 414.Particularly, in the present embodiment, being positioned at a plurality of touch-control sensings unit 419 of same row and all touch sensing elements 409 and the inductive coupling element 408 of a plurality of inductive couplings unit 418 all is to be connected to this signal processing circuit 440 by same touch induction lines 414.In fact, in the present embodiment, a plurality of touch sensing elements 409 and a plurality of inductive coupling element 408 that connect same touch induction lines 414 are crisscross arranged in the pixel cell of odd-numbered line.
Wherein, this touch-control sensing unit 419 can be used for providing a touch-control sensing signal to this signal processing circuit 440 the user when this touch control display apparatus 400 applies the touch-control action, and this inductive coupling unit 418 can be used for providing a coupled signal to this signal processing circuit 440.
See also Figure 10, it is the part side structure synoptic diagram of the touch-control sensing unit 419 in the described touch-control display panel 410.In each touch-control sensing unit 419, this touch sensing element 409 comprises that one is arranged on colored filter (Color Filter, CF) substrate and be arranged on thin film transistor (TFT) (Thin Film Transistor, TFT) substrate and touch-control electrode 422 and an on-off element 423 relative with described projection 421 by the projection 421, that above-mentioned common electrode layer covers.Described on-off element 423 has a control end, and whether this control end can be applied conducting or the cut-off state that the touch-control action determines this on-off element 423 by the user according to this touch-control sensing unit 419.Particularly, in the present embodiment, this on-off element 423 can have a thin-film transistor structure, and the grid of this thin film transistor (TFT) is as this control end, extend to described touch-control electrode 422 and contact with this touch-control electrode, its source electrode is connected to described sweep trace Gi-1, and its drain electrode is connected to described touch induction lines 414.When external force acts on this touch-control sensing unit 419, this projection 421 can make under described external force effect and cover its surperficial common electrode layer 416 butts to this touch-control electrode 422, thereby the common electric voltage of carrying on this common electrode layer 416 is applied to the grid of this on-off element 423 so that 423 conductings of this on-off element, at this moment, this on-off element 423 just its source electrode can be received from the sweep signal of this sweep trace Gi-1 as the touch-control sensing signal, and offer this signal processing circuit 440 by this touch induction lines 414.
The structure of this inductive coupling element 408 is similar to this touch sensing element 409, particularly, the structure of this inductive coupling element 408 is identical with this touch sensing element 409 in the structure of thin film transistor base plate one side, and compare with this touch sensing element 409, colored filter substrate one side of this inductive coupling element 408 does not comprise the projection of above-mentioned effect, promptly this inductive coupling element 408 is subjected to external force to do the time spent, not can with the direct conducting of this common electrode layer, so this inductive coupling element 408 is used for providing a coupled signal to this signal processing circuit 440.This inductive coupling element 408 comprises that an electrode 424 and has the on-off element 425 of thin-film transistor structure, and the grid of this on-off element 425, source electrode and drain electrode are connected with this electrode 424, this sweep trace Gi and this touch induction lines 414 respectively.
See also Figure 11, this signal processing circuit 440 comprises a plurality of signal processing units 441.Each signal processing unit 441 corresponds respectively to the inductive coupling unit 418 that is positioned at same row touch-control sensing unit 419, and be connected to the touch induction lines 414 of this row touch-control sensing unit 419 and inductive coupling unit 418 correspondences, be used for the signal that transmits by its corresponding touch induction lines 414 is handled.Particularly, described signal processing unit 441 comprises one first controlled switch 442, one second controlled switch 443, one first signal memory cell 444, a secondary signal storage unit 445 and a comparator circuit 446.These first controlled switch, 442 1 ends are connected to this touch induction lines 414, and the other end is connected to this comparator circuit 446 by this first signal memory cell 444; One end of this second controlled switch 443 also is connected to this touch induction lines, and the other end is connected to this comparator circuit 446 by this secondary signal storage unit 445.This first controlled switch 442 and this second controlled switch 443 can be logical at the inner sequential control lower whorl of this touch control display apparatus conductance, promptly at synchronization these both closure only arranged.In addition, in specific embodiment, this comparator circuit 446 can comprise the comparer of a differential amplifier structure, and it has a homophase input end, an inverting input and an output terminal.This first signal memory cell 444 is connected this in-phase input end and inverting input respectively with this secondary signal storage unit 445, and this output terminal is connected to this control circuit 450.The structure of this first signal memory cell 444 and this secondary signal storage unit 445 can be identical, and the two all can comprise a parallel memory capacitance 447 and a switch 448 that connects.
See also Figure 12, it is the drive signal waveform figure of touch control display apparatus 100 shown in Figure 9.Wherein, on behalf of this scan drive circuit 420, G0～Gm be applied to a plurality of sweep signals on this sweep trace G0～Gm respectively; Vd represents the data-signal on any data line among D1～Dn; Vcom represents the public voltage signal on this public electrode 416; Vr1 represents the conducting and the closing timing of this first controlled switch 442, and the high level period of Vr1 represent this first controlled switch, 442 conductings, on behalf of this first controlled switch 442, the low level period of Vr1 disconnect; Vr2 represents the conducting and the closing timing of this second controlled switch 443, and the high level period of Vr2 represent this second controlled switch, 443 conductings, on behalf of this second controlled switch 443, the low level period of Vr2 disconnect.
These a plurality of sweep signals are a series of high level pulses, usually, the timing definition that this multi-strip scanning line G0～Gm is all applied a high level pulse in regular turn is a frame (frame) image time, and any time in a frame time, have only a sweep trace G0～Gm to be applied in this high voltage pulse.In this multi-strip scanning line G0～Gm is applied a frame image time of high voltage pulse in regular turn, a plurality of data-signals of the representative one frame picture that this data drive circuit 430 is exported in regular turn are respectively by many data line D1～Dn, a plurality of thin film transistor (TFT)s 411 are written into each pixel electrode 412, simultaneously, this public voltage signal is written into these a plurality of public electrodes 416 (i.e. this common electrode layer 416), and then all pixel cells that make this touch control display apparatus 400 are all realized once showing, this touch control display apparatus 400 shows a frame picture, operation principles one of ordinary skill in the art of this part all can be understood, and therefore just repeats no more.Wherein, this public voltage signal is a polarity inversion signal, and it fluctuates a reference value, can set its reference value and amplitude range according to actual needs, as: reference value is 3V, and amplitude range is that 1V is to 5V; Perhaps reference value is 0V, and amplitude range is-and 3V is to 3V.
Following mask body is introduced the reading and processing procedure of touch-control sensing signal of this touch control display apparatus 400:
As shown in figure 12, in N frame image time, the sweep trace Gi-1 that is connected when this touch-control sensing unit 419 receives the T of sweep signal in the period (in the present embodiment, i is an odd number), and this public electrode 416 also is applied in the public voltage signal that a polarity is positive high level.Further, suppose that this T is in the period, the user moves when carrying out a certain operation to apply a touch-control when touch control display apparatus 400 by finger or pointer etc., and the corresponding touch-control sensing unit 419 that connects this sweep trace Gi-1 of described position of touch, this touch-control sensing unit 419 will receive the external force that is produced by this touch-control action, in this case, projection 421 in this touch sensing element 409 makes under this external force effect and covers its surperficial common electrode layer 416 butts that get to this touch-control electrode 422, thereby will carry to such an extent that common electric voltage is applied to the grid of this on-off element 423, these on-off element 423 conductings thus on this common electrode layer 416.This on-off element 423 exports this sweep signal to signal processing unit 441 corresponding in this signal processing circuit 440 as the touch-control sensing signal and by this touch induction lines 414, and, at this moment, according to Vr1 and Vr2 as can be known, first controlled switch, 442 conductings in this signal processing unit 441, second controlled switch 443 disconnects, make this signal processing unit 441 to read to the touch-control sensing signal of this touch induction lines 414, specifically, this touch-control sensing signal stores by the memory capacitance 447 that this first controlled switch 442 is admitted in this first signal memory cell 444.Because be subjected to the influence of factors such as the coupling of parasitic elements of these touch control display apparatus 400 inside and ambient temperature, the touch-control sensing signal that this signal processing unit 441 receives may also be mingled with other undesired signals.
Further, when sweep trace Gi+1 receives sweep signal, according to Vcom, Vr1, Vr2 as can be known, this public electrode is applied in the public voltage signal that a polarity is positive high level 416 this moments, and first controlled switch 442 in this signal processing unit 441 disconnects, 443 conductings of second controlled switch; The inductive coupling element 408 of this inductive coupling unit 418 is subjected to the influence of factors such as the coupling of parasitic elements of these touch control display apparatus 400 inside and ambient temperature, to this signal processing unit 441 outputs one coupled signal.Because of this first controlled switch 442 disconnects, these second controlled switch, 443 conductings, this signal processing unit 441 can read coupled signal, and promptly this coupled signal further stores by the memory capacitance 447 that this second controlled switch 443 is sent in this secondary signal storage unit 445.
Because this inductive coupling element 408 and these touch sensing element 409 close settings, and the structural similarity of the two, so this coupled signal is basic identical with the above-mentioned undesired signal that is mixed in this touch-control sensing signal.After this touch-control sensing signal and this coupled signal all are stored in first and second corresponding signal memory cell 444 and 445, this comparator circuit 446 reads this touch-control sensing signal and coupled signal from this first signal memory cell 444 and secondary signal storage unit 445 simultaneously, and the two is compared, promptly this touch-control sensing signal is handled according to this coupled signal, with with the filtering from this touch-control sensing signal of above-mentioned undesired signal, and export a corresponding touch-control and control signal to this control circuit 450, judge the coordinate of these position of touch for this control circuit 450.This control circuit 450 can be known the particular content of the operation that the user is performed according to the coordinate of judging, and provides control signal corresponding to control this touch control display apparatus 400 or use the electronic product of this touch control display apparatus 400 to operate accordingly.
In N+1 frame image time, the sweep trace Gi-1 that is connected when the touch sensing element 409 of this touch-control sensing unit 419 receives the T of sweep signal in the period, because of needing this public electrode 416 to be applied in a polarity, reversal of poles is negative low level public voltage signal, at this moment, according to Vr1 as can be known, first controlled switch 442 in this signal processing unit 441 disconnects, second controlled switch 443 disconnects, and this signal processing unit 441 does not read the touch-control sensing signal of this touch induction lines 414.
Further, when sweep trace Gi+1 receives sweep signal, because of needing this public electrode 416 to be applied in a polarity at this moment, reversal of poles is negative low level public voltage signal, at this moment, according to Vr2 as can be known, first controlled switch 442 in this signal processing unit 441 disconnects, and second controlled switch 443 disconnects, and this signal processing unit 441 does not read the coupled signal of this touch induction lines 414.
In N+2 frame image time, the operation steps of this touch control display apparatus 400 and this N frame image time are basic identical, specific as follows: the T that the sweep trace Gi-1 that is connected when the touch sensing element 409 of this touch-control sensing unit 419 receives sweep signal is in the period, is applied in the public voltage signal that a polarity is positive high level because of reversal of poles needs this public electrode 416.At this moment, the user moves when carrying out a certain operation to apply a touch-control when touch control display apparatus 400 by finger or pointer etc., and the corresponding touch-control sensing unit 419 that connects this sweep trace Gi-1 of described position of touch, on-off element 423 conductings of this touch sensing element 409, this touch sensing element 409 exports this sweep signal to signal processing unit 441 corresponding in this signal processing circuit 440 as the touch-control sensing signal and by this touch induction lines 414, and this moment, according to Vr as can be known, first controlled switch, 442 conductings in this signal processing unit 441, second controlled switch 443 disconnects, and makes this signal processing unit 441 to read the touch-control sensing signal of this touch induction lines 414.
Further, when this sweep trace Gi+1 receives sweep signal, be applied in the public voltage signal that a polarity is positive high level because of reversal of poles needs this public electrode 416, first controlled switch 442 in this signal processing unit 441 disconnects, 443 conductings of second controlled switch; The inductive coupling element 408 of this inductive coupling unit 418 is exported a coupled signal by this touch induction lines 414 to this signal processing unit 441.Because of these second controlled switch, 443 conductings, this signal processing unit 441 can read coupled signal, and further according to this touch-control sensing signal and this coupled signal filtering interference signals, control signal to this control circuit 450 and export a corresponding touch-control, judge the particular content that the touch-control coordinate is known the operation that the user is performed for this control circuit 450, and provide control signal corresponding to operate accordingly.
After the N+2 frame, this touch control display apparatus 400 can repeat each step and the action of this N+1 frame, N+2 frame, repeats no more herein.
According to as can be known above-mentioned, in the touch control display apparatus 400 of present embodiment, the polarity that receives sweep signal and public voltage signal at the sweep trace Gi-1 of these touch sensing element 409 connections is timing, first controlled switch, 442 conductings in this signal processing unit 441, and then the touch-control sensing signal of 441 pairs of these touch sensing elements of signal processing unit, 409 outputs reads; The polarity that receives sweep signal and public voltage signal as the sweep trace Gi+1 that connects at this inductive coupling element 408 is timing, second controlled switch, 443 conductings in this signal processing unit 441, and then the coupled signal of 441 pairs of these inductive coupling elements of this signal processing unit, 408 outputs reads, avoid appearing at that the public voltage signal positive-negative polarity all reads the touch-control sensing signal and the maloperation phenomenon that causes makes that these touch control display apparatus 400 reliabilities are higher.Further, this signal processing unit 441 is according to the undesired signal of coupled signal in can this touch-control sensing signal of filtering, make this control circuit 450 can accurately judge the particular content that the touch-control coordinate is known the operation that the user is performed, and provide control signal corresponding to operate accordingly, can reduce the probability of this touch control display apparatus 400 and associated electrical product generation misoperation, improve the stability and the reliability of this touch control display apparatus 400 and associated electrical product.
See also Figure 13, Figure 13 is the circuit diagram of touch control display apparatus the 5th embodiment of the present invention.The key distinction of the touch control display apparatus 500 of the 5th embodiment and the touch control display apparatus 400 of the 4th embodiment is: each touch-control sensing unit 519 comprises a touch sensing element 509, this touch sensing element 509 is preferably disposed in the pixel cell of this second subelement 519b, this touch sensing element 509 is connected to sweep trace Gi simultaneously, simultaneously, also be connected to this signal processing circuit 540 by a touch induction lines 514.Each inductive coupling unit 518 comprises an inductive coupling element 508, this inductive coupling element 508 is preferably disposed in the pixel cell of this second subelement 518b, this inductive coupling element 508 is connected to sweep trace Gi+2 simultaneously, simultaneously, also be connected to this signal processing circuit 540 by this touch induction lines 514.In fact, in the present embodiment, a plurality of touch sensing elements 509 and a plurality of inductive coupling element 508 that connect same touch induction lines 514 are crisscross arranged in the pixel cell of even number line.
See also Figure 14, it is the drive signal waveform figure of touch control display apparatus 500 shown in Figure 13.According to Figure 14 as can be known, when these touch control display apparatus 500 work, first controlled switch in this signal processing unit 541 is when the sweep trace Gi that is connected with touch sensing element 509 receives sweep signal, and the conducting when negative of this public voltage signal polarity, and then this signal processing unit 541 is to read at public voltage signal polarity touch-control sensing signal to these touch sensing element 509 outputs when negative; Second controlled switch in this signal processing unit 541 is when the sweep trace Gi+2 that is connected with inductive coupling element 508 receives sweep signal, and conducting when this public voltage signal polarity is negative, and then this signal processing unit 541 is to read at public voltage signal polarity coupled signal to these inductive coupling element 508 outputs when negative, therefore can avoid appearing at that the public voltage signal positive-negative polarity all reads the touch-control sensing signal and the maloperation phenomenon that causes makes that these touch control display apparatus 500 reliabilities are higher.
See also Figure 15, it is the circuit diagram of touch control display apparatus the 6th embodiment of the present invention.The key distinction of the touch control display apparatus 600 of the 6th embodiment and the touch control display apparatus 400 of the 4th embodiment is: in this touch-control display panel 610, p * q pixel cell formed a touch-control sensing unit 619, p * q pixel cell formed an inductive coupling unit 618 wherein p=3, q=1, and promptly each touch-control sensing unit 619 and each inductive coupling unit 618 comprise 3 * 1 pixel cells respectively.
Each touch-control sensing unit 619 comprises a touch sensing element 609, and this touch sensing element 609 can be arranged in any pixel cell of this touch-control sensing unit 619, and this touch sensing element 609 is connected to corresponding one scan line, simultaneously, also be connected to this signal processing circuit 640 by a touch induction lines 614.Each inductive coupling unit 618 comprises an inductive coupling element 608, and this inductive coupling element 608 can be arranged in any pixel cell of this inductive coupling unit 618, and this inductive coupling element 608 is connected to corresponding one scan line, simultaneously, also be connected to this signal processing circuit 640 by a touch induction lines 614.In the present embodiment, being positioned at a plurality of touch-control sensings unit 619 of same row and all touch sensing elements 609 and the inductive coupling element 608 of a plurality of inductive couplings unit 618 all is to be connected to this signal processing circuit 640 by same touch induction lines 614.In the present embodiment, a touch-control sensing unit group is formed in the touch-control sensing unit 619 that is positioned at two adjacent lines of same row, an inductive coupling unit group is formed in the inductive coupling unit 618 that is positioned at two adjacent lines of same row, and this touch-control sensing unit group and this inductive coupling unit group are crisscross arranged.
For ease of describing, below to lay respectively at i capable and i+1 is capable in supposition two touch-control sensing unit 619, and it is capable and i+3 is capable that two inductive coupling unit 618 lay respectively at i+2.See also Figure 16, it is the drive signal waveform figure of touch control display apparatus 600 shown in Figure 15.Introduce this touch-control according to Figure 16 below and show that adorning 600 puts reading and processing procedure of middle touch-control sensing signal.
In N frame image time, this sweep trace Gi-1 receives the T of sweep signal in the period, and this public electrode 616 also is applied in the public voltage signal that a polarity is positive high level.At this moment, the user moves when carrying out a certain operation to apply a touch-control when touch control display apparatus 600 by finger or pointer etc., and the corresponding touch-control sensing unit 619 that connects this sweep trace Gi-1 of described position of touch, on-off element 623 conductings of this touch sensing element 609, and export in this signal processing circuit 640 this sweep signal to corresponding signal processing unit 641 as the touch-control sensing signal and by this touch induction lines 614, and this moment, according to Vr1 as can be known, the first controlled switch conducting in this signal processing unit 641, second controlled switch disconnects, and makes this signal processing unit 641 to read the touch-control sensing signal of these touch-control sensing unit 619 outputs; Further, when this sweep trace Gi+1 receives sweep signal, be applied in the public voltage signal that a polarity is positive high level because of reversal of poles needs this public electrode 614, first controlled switch in this signal processing unit 641 disconnects, the second controlled switch conducting; This inductive coupling element 608 is exported a coupled signal by this touch induction lines 614 to this signal processing unit 641.Because of these second controlled switch, 643 conductings, this signal processing unit 641 can read coupled signal, and further according to this touch-control sensing signal and this coupled signal filtering interference signals, control signal to this control circuit 650 and export a corresponding touch-control, judge the particular content that the touch-control coordinate is known the operation that the user is performed for this control circuit 650, and provide control signal corresponding to operate accordingly.
In N+1 frame image time, this sweep trace Gi receives the T of sweep signal in the period, and this public electrode 616 also is applied in the public voltage signal that a polarity is positive high level.At this moment, the user moves when carrying out a certain operation to apply a touch-control when touch control display apparatus 600 by finger or pointer etc., and the corresponding touch-control sensing unit 619 that connects this sweep trace Gi of described position of touch, the on-off element conducting of this touch sensing element 609, and export in this signal processing circuit 640 this sweep signal to corresponding signal processing unit 641 as the touch-control sensing signal and by this touch induction lines 614, and this moment, according to Vr1, Vr2 as can be known, the first controlled switch conducting in this signal processing unit 641, second controlled switch disconnects, and makes this signal processing unit 641 to read the touch-control sensing signal of these touch sensing element 609 outputs.
Further, when this sweep trace Gi+2 receives sweep signal, be applied in the public voltage signal that a polarity is positive high level because of reversal of poles needs this public electrode 616, first controlled switch in this signal processing unit 641 disconnects, the second controlled switch conducting; According to Vr1, Vr2 as can be known, the coupled signal that 641 pairs of this signal processing units connect inductive coupling element 608 outputs of this sweep trace Gi+2 reads, and further according to this touch-control sensing signal and this coupled signal filtering interference signals, control signal to this control circuit 650 and export a corresponding touch-control, judge the particular content that the touch-control coordinate is known the operation that the user is performed for this control circuit 650, and provide control signal corresponding to operate accordingly.
After this N+1 frame, this touch control display apparatus 600 can repeat each step and the action of this N frame, N+1 frame, repeats no more herein.
Compared with prior art, in N frame image time, first controlled switch in this signal processing unit 641 is when this sweep trace Gi-1 receives sweep signal, and this public voltage signal polarity is the timing conducting, makes that this signal processing unit 641 can be that the touch-control sensing signal that timing is exported this touch sensing element 609 reads in public voltage signal polarity; When this sweep trace Gi+1 receives sweep signal, and this public voltage signal polarity is this second controlled switch conducting of timing, makes that this signal processing unit 641 can be that the coupled signal that timing is exported this inductive coupling element 608 reads in public voltage signal polarity.Further, in N+1 frame image time, first controlled switch in this signal processing unit 641 is when this sweep trace Gi receives sweep signal, and this public voltage signal polarity is the timing conducting, makes that this signal processing unit 641 can be that the touch-control sensing signal that timing is exported this touch sensing element 609 reads in public voltage signal polarity; When this sweep trace Gi+2 receives sweep signal, and this public voltage signal polarity is this second controlled switch conducting of timing, makes that this signal processing unit 641 can be that the coupled signal that timing is exported this inductive coupling element 608 reads in public voltage signal polarity.Avoid appearing at that the public voltage signal positive-negative polarity all reads the touch-control sensing signal and the maloperation phenomenon that causes makes that these touch control display apparatus 600 reliabilities are higher.
In addition, this touch control display apparatus 600 all reads touch-control sensing signal and coupled signal at every frame image time, and than the touch control display apparatus 400 and the 500 reading frequency height of the 4th, the 5th embodiment, and then the sensitivity of this touch control display apparatus 600 is higher.
Be to be understood that, the above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.Such as: in first embodiment, this touch sensing element can not be made up of projection 121, touch-control electrode 122 and an on-off element 123, and it can be the photosensitive type touch sensing element that is made of a photo tft; In addition, when this on-off element 123,125 is the top gate type thin film transistor of grid in the superiors, this touch sensing element 108 can not comprise this touch-control electrode 122, this inductive coupling element 109 can not comprise this electrode 124, and projection 121 makes under this external force effect and covers its surperficial grid that gets the common electrode layer butt to this on-off element 123.In addition, this touch-control display panel also 110 can comprise many another sweep traces with the parallel production of this sweep trace, this touch sensing element 109 can be connected to this another sweep trace, provide corresponding sweep signal to this touch sensing element 109, the i.e. source electrode of this on-off element 123 by this another sweep trace.In the 4th embodiment, this touch sensing element 409 can be connected to this another sweep trace, provides corresponding sweep signal to this touch sensing element 409, the i.e. source electrode of this on-off element 425 by this another sweep trace.
Claims (17)
1. touch control display apparatus, it comprises a touch-control display panel and a signal processing circuit, this touch-control display panel comprises the multi-strip scanning line, many data lines, a plurality of pixel cells and a common electrode layer, it is characterized in that: these a plurality of pixel cells are formed a plurality of touch-control sensings unit, each touch-control sensing unit comprises a touch sensing element, this touch sensing element is connected to corresponding one scan line on the one hand, be connected to this signal processing circuit when being subjected to the external force touch-control, to provide a touch-control sensing signal by a touch induction lines on the other hand to this signal processing circuit, this common electrode layer is applied in a public voltage signal, this public voltage signal is a polarity inversion signal, it comprises one first polarity and one and this first opposite polarity second polarity, the public voltage signal that the sweep trace that connects when this touch sensing element is applied in high voltage and this common electrode layer is first polarity chron, and this signal processing circuit reads the signal on this touch induction lines.
2. touch control display apparatus as claimed in claim 1, it is characterized in that: this touch sensing element comprises the projection that an on-off element and is covered by this common electrode layer, and this touch sensing element its projection under external force makes the common electrode layer butt that covers this protrusion surface to this second substrate and this on-off element of conducting and export this touch-control sensing signal.
3. touch control display apparatus as claimed in claim 2, it is characterized in that: this touch sensing element also comprises a touch-control electrode, this touch-control electrode is connected to the control end of the on-off element of this touch sensing element, and this touch sensing element its projection under external force makes the common electrode layer butt that covers this protrusion surface to this touch-control electrode and this on-off element of conducting.
4. touch control display apparatus as claimed in claim 2, it is characterized in that: this a plurality of touch-control sensings unit is matrix distribution, and a plurality of touch sensing elements that are positioned at a plurality of touch-control sensings unit of same row are connected to this signal processing circuit by same touch induction lines.
5. touch control display apparatus as claimed in claim 4 is characterized in that: this signal processing circuit comprises a plurality of signal processing units, the corresponding touch induction lines that connects of each signal processing unit.
6. touch control display apparatus as claimed in claim 5, it is characterized in that: this touch control display apparatus also comprises a control circuit, each signal processing unit comprises controlled switch, a signal memory cell and a comparator circuit, this comparator circuit comprises two input ends and an output terminal, this touch induction lines is connected to an input end of this comparator circuit by this controlled switch, this signal memory cell in regular turn, another input end of this comparator circuit is transfused to a reference voltage signal, and the output terminal of this comparator circuit is connected to this control circuit.
7. touch control display apparatus as claimed in claim 1, it is characterized in that: these a plurality of pixel cells have also been formed a plurality of inductive couplings unit, each inductive coupling unit comprises an inductive coupling element, this inductive coupling element is connected to corresponding one scan line on the one hand, be connected to this signal processing circuit to provide a coupled signal by this touch induction lines on the other hand to this signal processing circuit, when the public voltage signal that the sweep trace that connects when this inductive coupling unit is applied in high voltage and this common electrode layer is positive polarity, this signal processing circuit reads the signal on this touch induction lines, and this signal processing circuit is handled with the undesired signal in this touch-control sensing signal of filtering according to touch-control sensing signal and this inductive coupling signal.
8. touch control display apparatus as claimed in claim 7 is characterized in that: this inductive coupling element comprises an on-off element, and this inductive coupling element is subjected to external force to do the time spent, its on-off element not can with this common electrode layer conducting.
9. touch control display apparatus as claimed in claim 8 is characterized in that: this inductive coupling element also comprises an electrode, and this electrode is connected to the control end of the on-off element of this inductive coupling element.
10. touch control display apparatus as claimed in claim 7, it is characterized in that: this a plurality of touch-control sensings unit and a plurality of inductive couplings unit are matrix distribution, and are positioned at a plurality of touch-control sensings unit of same row and a plurality of touch sensing elements and a plurality of inductive coupling element of a plurality of inductive couplings unit is connected to this signal processing circuit by same touch induction lines.
11. touch control display apparatus as claimed in claim 10 is characterized in that: this signal processing circuit comprises a plurality of signal processing units, the corresponding touch induction lines that connects of each signal processing unit.
12. touch control display apparatus as claimed in claim 11, it is characterized in that: this touch control display apparatus also comprises a control circuit, each signal processing unit comprises one first controlled switch, one first signal memory cell, one second controlled switch, an one secondary signal storage unit and a comparator circuit, this comparator circuit comprises two input ends and an output terminal, this touch induction lines is on the one hand by this first controlled switch, this first signal memory cell is connected to an input end of this comparator circuit, on the other hand by this second controlled switch, this secondary signal storage unit is connected to another input end of this comparator circuit, and the output terminal of this comparator circuit is connected to this control circuit.
13. touch control display apparatus as claimed in claim 1 is characterized in that: this first polarity for just and this second polarity for negative, perhaps this first polarity for negative and this second polarity for just.
14. touch control display apparatus as claimed in claim 4, it is characterized in that: each touch-control sensing unit comprises 3 * 2 pixel cells that are positioned at adjacent two row, and this touch sensing element all is arranged in the pixel cell of odd-numbered line or all is arranged in the pixel cell of even number line.
15. touch control display apparatus as claimed in claim 4 is characterized in that: each touch-control sensing unit comprises 3 * 1 pixel cells that are positioned at delegation, and this touch sensing element is positioned at these 3 * 1 pixel cells among one of them.
16. touch control display apparatus as claimed in claim 10, it is characterized in that: each touch-control sensing unit and each inductive coupling unit include 3 * 2 pixel cells that are positioned at adjacent two row, be positioned at the staggered setting at interval in touch-control sensing unit and this inductive coupling unit of same row, this touch sensing element and inductive coupling element are arranged in the pixel cell of equal odd-numbered line or all are arranged in the pixel cell of even number line.
17. touch control display apparatus as claimed in claim 10, it is characterized in that: each touch-control sensing unit and each inductive coupling unit include 3 * 1 pixel cells that are positioned at delegation, a touch-control sensing unit group is formed in the per two touch-control sensing unit that are positioned at adjacent two row, an inductive coupling unit group is formed in the per two inductive coupling unit that are positioned at adjacent two row, is positioned at the touch-control sensing unit group and the staggered setting at interval of this inductive coupling unit group of same row.
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| CN103412676A (en) * | 2013-07-29 | 2013-11-27 | 合肥京东方光电科技有限公司 | Touch screen and display device. |
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| CN104698699A (en) * | 2015-04-01 | 2015-06-10 | 上海天马微电子有限公司 | Array substrate, display panel, display device and driving method thereof |
| CN104730747A (en) * | 2013-12-24 | 2015-06-24 | 业鑫科技顾问股份有限公司 | Embedded touch display device |
| CN104793799A (en) * | 2015-05-04 | 2015-07-22 | 京东方科技集团股份有限公司 | Touch structure, touch display panel, touch display device and touch driving method |
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