CN105404429A - Touch control circuit and touch control display device - Google Patents
Touch control circuit and touch control display device Download PDFInfo
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- CN105404429A CN105404429A CN201510991761.2A CN201510991761A CN105404429A CN 105404429 A CN105404429 A CN 105404429A CN 201510991761 A CN201510991761 A CN 201510991761A CN 105404429 A CN105404429 A CN 105404429A
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- touch
- control circuit
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
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- General Physics & Mathematics (AREA)
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Abstract
The invention provides a touch control circuit and a touch control display device. The touch control circuit comprises a multiplexer, a filtering switch, a signal converter, a digital signal processor and a controller. The multiplexer is provided with a plurality of input terminals. The plurality of input terminals are in one-to-one correspondence with a plurality of sensing lines arranged on a touch control display panel and are connected with each other. The output terminal of the multiplexer is connected with the input terminal of the signal converter. The output terminal of the signal converter is connected with the input terminal of the signal converter. The output terminal of the signal converter is connected with the input terminal of the digital signal processor. The filtering switch is connected between the output terminal of the multiplexer and a direct-current voltage source. The grid electrode of the filtering switch is used for receiving a switching control signal provided by the controller. According to the technical scheme of the touch control circuit and the touch control display device, the capacitance on the touch control display panel is detected by the multiplexer and the filtering switch, so that the influence of the driver noise on a sensing result can be reduced. Therefore, the sensing result of the touch control circuit is more accurate. Furthermore, the sensing performance of the touch control display device is improved.
Description
Technical field
The present invention relates to technical field of touch control, particularly a kind of touch-control circuit and touch display device.
Background technology
In recent years, along with fast development and the application of infotech, radio mobile communication and information household appliances, the dependence of people to electronic product grows with each passing day, and more brings the flourish of various display technique and display device.Touch controllable function is combined the touch-control display panel formed with Presentation Function, owing to having the characteristic of human-computer interaction, be widely used on various product, comprised mobile phone (mobilephone), satellite navigation system (GPSnavigatorsystem), flat computer (tabletPC), personal digital assistant (PDA), mobile computer (laptopPC) and Medical Devices etc.
Please refer to Fig. 1, it is the structural representation of the touch-control display panel of prior art.As shown in Figure 1, existing touch-control display panel 100 comprises: the first sense wire (X1 to Xn) of touch-control circuit 10, electric capacity (Cxy11 to Cxynm), X-direction and the second sense wire (Y1 to Ym) of Y-direction, described first sense wire and the second sense wire are crisscross setting, described electric capacity is arranged between described first sense wire and the second sense wire, and described touch-control circuit 10 is connected with the second sense wire.
When described touch-control display panel 100 works, first sense wire input signal of X-direction, by second sense wire of capacitive coupling electric charge to Y-direction, then respond to the charge variation of the second sense wire via described touch-control circuit 10, and then produce voltage signal (Vo_1 to Vo_m).Judged the size variation of electric capacity by the change of voltage signal, then judged whether touch control operation by the size variation of electric capacity, in order to perform the touch-control sensing on described touch-control display panel 100.
But find in actual use, the tactile signals that existing touch-control circuit 10 exports can be subject to the impact of the driving noise signal of described touch-control display panel, its induction result out of true.
Base this, how solving existing touch-control circuit becomes the current technical matters needing solution badly for the accurate not problem of induction of touching signals.
Summary of the invention
The object of the present invention is to provide a kind of touch-control circuit and touch display device, to solve the induction not accurate problem of existing touch-control circuit for touching signals.
For solving the problem, the invention provides a kind of touch-control circuit, described touch-control circuit comprises: multiplexer, filter switch, signal converter, digital signal processor and controller;
Described multiplexer has multiple input end, and many line of induction one_to_one corresponding on described multiple input end and touch-control display panel are also interconnected; The output terminal of described multiplexer is connected with the input end of described signal converter, and the output terminal of described signal converter is connected with the input end of described digital signal processor; Between the output terminal that described filter switch is connected to described multiplexer and direct voltage source, the switch controlling signal that its grid provides for receiving described controller.
Optionally, in described touch-control circuit, described multiplexer comprises multiple thin film transistor (TFT), first electrode of described multiple thin film transistor (TFT) is all connected to first node, described first node is as the output terminal of described multiplexer, many line of induction one_to_one corresponding on second electrode of described multiple thin film transistor (TFT) and described touch-control display panel are also interconnected, the scan control signal that the grid of each thin film transistor (TFT) provides for receiving described controller.
Optionally, in described touch-control circuit, described signal converter is analog-digital converter.
Optionally, in described touch-control circuit, described signal converter is comparer;
Described comparer has first input end, the second input end, signal control end and signal output part, described first input end is connected with the output terminal of described multiplexer, described second input end is connected with direct voltage source, the second clock signal that described signal control end provides for receiving described controller, described signal output part is connected with the input end of described digital signal processor.
Optionally, in described touch-control circuit, be provided with a compensating circuit between described second input end and direct voltage source, described compensating circuit is that described direct voltage source affords redress voltage.
Optionally, in described touch-control circuit, described touch-control circuit also comprises a storer, and the output terminal of described signal converter is connected with described storer by described digital signal processor, and described storer is for reading or write the signal after via described digital signal processor processes.
Optionally, in described touch-control circuit, described digital signal processor comprises a storer, and described storer is for reading or write the signal after via described digital signal processor processes.
Accordingly, present invention also offers a kind of touch display device, described touch display device comprises: touch-control display panel, driver and touch-control circuit as above;
Described touch-control display panel is provided with multiple electric capacity, many lines of induction and many drive wires, described many lines of induction and many drive wires are crisscross setting; One end of described many lines of induction and described multiple electric capacity one_to_one corresponding are also interconnected, the other end of described many lines of induction and multiple input end one_to_one corresponding of described touch-control circuit are also interconnected, and described touch-control circuit senses the multiple electric capacity on described touch-control display panel by described many lines of induction; Described many drive wires are all connected with described driver, and described driver provides display drive signals by described many drive wires to described touch-control display panel.
Optionally, in described touch display device, multiple thin film transistor (TFT)s of described filter switch and described multiplexer are all arranged on the array base palte of described touch-control display panel.
Optionally, in described touch display device, described display drive signals is synchronous with touch drive singal.
In touch-control circuit provided by the invention and touch display device, utilize multiplexer and filter switch to detect the electric capacity on touch-control display panel, thus reduce the impact driving noise signal on induction result, make the induction result of described touch-control circuit more accurate, and then make the sensitivity of described touch display device better.
Accompanying drawing explanation
Fig. 1 is the structural representation of the touch-control display panel of prior art;
Fig. 2 is the structural representation of the touch display device of the embodiment of the present invention;
Fig. 3 is the schematic diagram of the touch display device of the embodiment of the present invention;
Fig. 4 is the signal waveforms of the touch-control circuit of the embodiment of the present invention.
Embodiment
A kind of touch-control circuit proposed the present invention below in conjunction with the drawings and specific embodiments and touch display device are described in further detail.According to the following describes and claims, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts the form that simplifies very much and all uses non-ratio accurately, only in order to object that is convenient, the aid illustration embodiment of the present invention lucidly.
Please refer to Fig. 2, it is the structural representation of the touch display device of the embodiment of the present invention.As shown in Figure 2, described touch-control circuit 20 comprises: multiplexer 21, filter switch TS, signal converter 23, digital signal processor DSP and controller 25; Described multiplexer 21 has multiple input end, and many line of induction one_to_one corresponding on described multiple input end and touch-control display panel are also interconnected; The output terminal of described multiplexer 21 is connected with the input end of described signal converter 23, and the output terminal of described signal converter 23 is connected with the input end of described digital signal processor DSP; Between the output terminal that described filter switch TS is connected to described multiplexer 21 and direct voltage source VS, the switch controlling signal SW that its grid provides for receiving described controller 25.
Concrete, described multiplexer 21 comprises multiple thin film transistor (TFT) (T1 to TN), first electrode of described multiple thin film transistor (TFT) is all connected to first node N1, described first node N1 is as the output terminal of described multiplexer 21, many line of induction one_to_one corresponding on second electrode of described multiple thin film transistor (TFT) and described touch-control display panel are also interconnected, the scan control signal that the grid of each thin film transistor (TFT) provides for receiving described controller 25.
Please refer to Fig. 3, it is the schematic diagram of the touch display device of the embodiment of the present invention.As shown in Figure 3, in described multiplexer 21, the first film transistor T1 controls by the first scan control signal S1, and the second thin film transistor (TFT) T2 controls by the second scan control signal S2, by that analogy, N thin film transistor TN controls by N scan control signal SN.
Please continue to refer to Fig. 2 or Fig. 3, first electrode of described filter switch TS is connected with the output terminal of described multiplexer 21, second electrode of described filter switch TS is connected with direct voltage source VS, and the conducting of described filter switch TS and cut-off are subject to the control of switch controlling signal SW.Wherein, direct voltage source VS is generally low level voltage source, and magnitude of voltage and the ground voltage GND of described direct voltage source VS are close.
Above-mentioned first electrode and the second electrode are different electrodes.Such as, when the first electrode is set to source electrode, the second electrode is set to drain electrode.
In the present embodiment, described signal converter 23 is comparers.As shown in Figure 3, described comparer has first input end a1, the second input end a2, signal control end CK and signal output part out, described first input end a1 is connected with the output terminal of described multiplexer 21, described second input end a2 is connected with direct voltage source VS, the second clock signal CK2 that described signal control end CK provides for receiving described controller 25, described signal output part out is connected with the input end of described digital signal processor DSP.
Preferably, be provided with a compensating circuit between described second input end a2 and direct voltage source VS, described compensating circuit is that described direct voltage source VS affords redress voltage VTH.
In other embodiments, described signal converter 23 can adopt the signal converter part of analog-digital converter (ADC) or other types, as long as the simulating signal that can be received with 0 or 1 way selection out.
In the present embodiment, described touch-control circuit 20 also comprises a storer 27, and the output terminal of described signal converter 23 is connected with storer 27 by digital signal processor DSP, and described storer 27 is for reading or write the digital signal after filtering process.
In other embodiments, can directly adopt the digital signal processor DSP with storer, need not arrange storer in addition in said touch-control circuit 20, structure is simpler.
Incorporated by reference to reference to figure 3 and Fig. 4, in touch-control sensing process, described controller 25 provides the first clock signal C K1, signal after touch drive singal VD superposes with the driving noise signal VN that described display drive signals VT causes starts to put on Section Point N2, described multiplexer 21 detects electric capacity (C1 to CN) on touch-control display panel according to scan control signal (S1 to SN) and with the form output detections result of simulating signal, described signal converter 23 receives simulating signal, and the simulating signal received is converted to digital signal (0 or 1), described digital signal processor DSP receives the digital signal that described signal converter 23 exports, and described digital signal is carried out filtering process, digital signal after filtering process writes described storer 27.In the process, described filter switch TS adjusts the testing result that described multiplexer 21 exports according to switch controlling signal SW, reduces the impact driving noise signal VN.
In the present embodiment, the electric capacity (C1 to CN) on touch-control display panel is detected by described multiplexer 21 and filter switch TS, the impact of described driving noise signal VN on induction result can be reduced, make the induction result of described touch-control circuit 20 more accurate.
Accordingly, present invention also offers a kind of touch display device.Incorporated by reference to referring to figs. 2 and 3, described touch display device 200 comprises: touch-control display panel 30, driver 40 and touch-control circuit 20 as above; Described touch-control display panel 30 is provided with multiple electric capacity (C1 to CN), many lines of induction (SL1 to SLN) and many drive wires (DL1 to DLM), described many lines of induction (SL1 to SLN) and many drive wires (DL1 to DLM) are in crisscross setting; One end of described many lines of induction (SL1 to SLN) and described multiple electric capacity (C1 to CN) one_to_one corresponding are also interconnected, the other end of described many lines of induction (SL1 to SLN) and multiple input end one_to_one corresponding of described touch-control circuit 20 are also interconnected, and described touch-control circuit 20 senses the multiple electric capacity (C1 to CN) on described touch-control display panel 30 by described many lines of induction (SL1 to SLN); Described many drive wires (DL1 to DLM) are all connected with described driver 40, and described driver 40 provides display drive signals VT by described many drive wires (DL1 to DLM) to described touch-control display panel 30.
Concrete, first electrode one_to_one corresponding of the multiple electric capacity (C1 to CN) on described many lines of induction (SL1 to SLN) and described touch-control display panel 30 is also interconnected, and described many lines of induction (SL1 to SLN) are for passing to multiple input ends (i.e. multiple input ends of described multiplexer 21) of described touch-control circuit 20 by the touch signal on described touch-control display panel 30.
Preferably, multiple thin film transistor (TFT) (T1 to TN) of described multiplexer 21 and filter switch TS are all arranged on the array base palte of described touch-control display panel 30.
As shown in Figure 3, second electrode of described multiple electric capacity (C1 to CN) is all connected to Section Point N2, described Section Point N2 is as the input end touching drive singal VD, and described touch drive singal VD superposes the after-applied input end to described touch drive singal VD with the driving noise signal VN caused by described display drive signals VT.Wherein, described touch drive singal VD is synchronous with described display drive signals VT.
In the present embodiment, described touch display device have employed described touch-control circuit 20, and the tactile signals exported due to described touch-control circuit 20 can not be subject to the impact driving noise signal VN substantially, and therefore sensitivity is better.
To sum up, in touch-control circuit provided by the invention and touch display device, utilize multiplexer and filter switch to detect the electric capacity on touch-control display panel, thus reduce the impact driving noise signal on induction result, make the induction result of described touch-control circuit more accurate, and then improve the sensitivity of described touch display device.
Foregoing description is only the description to present pre-ferred embodiments, any restriction not to the scope of the invention, and any change that the those of ordinary skill in field of the present invention does according to above-mentioned disclosure, modification, all belong to the protection domain of claims.
Claims (10)
1. a touch-control circuit, is characterized in that, comprising: multiplexer, filter switch, signal converter, digital signal processor and controller;
Described multiplexer has multiple input end, and many line of induction one_to_one corresponding on described multiple input end and touch-control display panel are also interconnected; The output terminal of described multiplexer is connected with the input end of described signal converter, and the output terminal of described signal converter is connected with the input end of described digital signal processor; Between the output terminal that described filter switch is connected to described multiplexer and direct voltage source, the switch controlling signal that its grid provides for receiving described controller.
2. touch-control circuit as claimed in claim 1, it is characterized in that, described multiplexer comprises multiple thin film transistor (TFT), first electrode of described multiple thin film transistor (TFT) is all connected to first node, described first node is as the output terminal of described multiplexer, many line of induction one_to_one corresponding on second electrode of described multiple thin film transistor (TFT) and described touch-control display panel are also interconnected, the scan control signal that the grid of each thin film transistor (TFT) provides for receiving described controller.
3. touch-control circuit as claimed in claim 1, it is characterized in that, described signal converter is analog-digital converter.
4. touch-control circuit as claimed in claim 1, it is characterized in that, described signal converter is comparer;
Described comparer has first input end, the second input end, signal control end and signal output part, described first input end is connected with the output terminal of described multiplexer, described second input end is connected with direct voltage source, the second clock signal that described signal control end provides for receiving described controller, described signal output part is connected with the input end of described digital signal processor.
5. touch-control circuit as claimed in claim 4, is characterized in that, be provided with a compensating circuit between described second input end and direct voltage source, and described compensating circuit is that described direct voltage source affords redress voltage.
6. the touch-control circuit as described in any one of claim 1 to 5, it is characterized in that, described touch-control circuit also comprises a storer, the output terminal of described signal converter is connected with described storer by described digital signal processor, and described storer is for reading or write the signal after via described digital signal processor processes.
7. touch-control circuit as claimed in claim 1, it is characterized in that, described digital signal processor comprises a storer, and described storer is for reading or write the signal after via described digital signal processor processes.
8. a touch display device, is characterized in that, comprising: touch-control display panel, driver and the touch-control circuit according to any one of claim 1 to 7;
Described touch-control display panel is provided with multiple electric capacity, many lines of induction and many drive wires, described many lines of induction and many drive wires are crisscross setting; One end of described many lines of induction and described multiple electric capacity one_to_one corresponding are also interconnected, the other end of described many lines of induction and multiple input end one_to_one corresponding of described touch-control circuit are also interconnected, and described touch-control circuit senses the multiple electric capacity on described touch-control display panel by described many lines of induction; Described many drive wires are all connected with described driver, and described driver provides display drive signals by described many drive wires to described touch-control display panel.
9. touch display device as claimed in claim 8, it is characterized in that, multiple thin film transistor (TFT)s of described filter switch and described multiplexer are all arranged on the array base palte of described touch-control display panel.
10. touch display device as claimed in claim 8, is characterized in that, described display drive signals is synchronous with touch drive singal.
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| CN201510991761.2A CN105404429B (en) | 2015-12-24 | 2015-12-24 | Touch-control circuit and touch display device |
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| CN201510991761.2A CN105404429B (en) | 2015-12-24 | 2015-12-24 | Touch-control circuit and touch display device |
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| CN105404429A true CN105404429A (en) | 2016-03-16 |
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| CN108073319A (en) * | 2016-11-11 | 2018-05-25 | 晶门科技（深圳）有限公司 | For the reconfigurable touch sensible of touch display panel |
| CN109324711A (en) * | 2018-08-17 | 2019-02-12 | 北京集创北方科技股份有限公司 | Data processing method and device |
| CN110383219A (en) * | 2018-02-14 | 2019-10-25 | 深圳市为通博科技有限责任公司 | Touch controller, touch control display system and touch-control show synchronous method |
| CN110673758A (en) * | 2019-05-07 | 2020-01-10 | 友达光电股份有限公司 | Touch control display device |
| CN110727319A (en) * | 2019-09-30 | 2020-01-24 | 深圳市叉义科技有限公司 | Display with control device |
| CN116880715A (en) * | 2023-09-05 | 2023-10-13 | 合肥创发微电子有限公司 | Touch sensing circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106297660A (en) * | 2016-09-05 | 2017-01-04 | 京东方科技集团股份有限公司 | A kind of image element circuit and driving method, display floater and display device |
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| CN110383219B (en) * | 2018-02-14 | 2023-06-16 | 深圳市为通博科技有限责任公司 | Touch controller, touch display system and touch display synchronization method |
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| CN110673758A (en) * | 2019-05-07 | 2020-01-10 | 友达光电股份有限公司 | Touch control display device |
| CN110673758B (en) * | 2019-05-07 | 2023-04-07 | 友达光电股份有限公司 | Touch control display device |
| CN110727319A (en) * | 2019-09-30 | 2020-01-24 | 深圳市叉义科技有限公司 | Display with control device |
| CN116880715A (en) * | 2023-09-05 | 2023-10-13 | 合肥创发微电子有限公司 | Touch sensing circuit |
| CN116880715B (en) * | 2023-09-05 | 2023-11-17 | 合肥创发微电子有限公司 | Touch sensing circuit |
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| CN105404429B (en) | 2019-03-26 |
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Application publication date: 20160316 Assignee: Bazhou Yungu Electronic Technology Co., Ltd.|Yungu (Gu'an) Technology Co., Ltd Assignor: Kunshan Institute of technology new flat panel display technology center Co., Ltd.|Kunshan Guoxian photoelectric Co., Ltd Contract record no.: X2019990000153 Denomination of invention: Touch control circuit and touch control display device Granted publication date: 20190326 License type: Common License Record date: 20191030 |
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Effective date of registration: 20201216 Address after: No.146 Tianying Road, high tech Zone, Chengdu, Sichuan Province Patentee after: Chengdu CHENXIAN photoelectric Co.,Ltd. Address before: No. 215300, Kunshan, Jiangsu Province Patentee before: Kunshan New Flat Panel Display Technology Center Co.,Ltd. Patentee before: KunShan Go-Visionox Opto-Electronics Co.,Ltd. |
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