CN105404429B - Touch-control circuit and touch display device - Google Patents
Touch-control circuit and touch display device Download PDFInfo
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- CN105404429B CN105404429B CN201510991761.2A CN201510991761A CN105404429B CN 105404429 B CN105404429 B CN 105404429B CN 201510991761 A CN201510991761 A CN 201510991761A CN 105404429 B CN105404429 B CN 105404429B
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- touch
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- control circuit
- multiplexer
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- 230000006698 induction Effects 0.000 claims abstract description 35
- 239000003990 capacitor Substances 0.000 claims abstract description 20
- 239000010409 thin film Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The present invention provides a kind of touch-control circuit and touch display devices, wherein touch-control circuit includes: multiplexer, filter switch, signal adapter, digital signal processor and controller；Multiplexer has multiple input terminals, and multiple input terminals are corresponded and are connected with each other with a plurality of line of induction on touch-control display panel；The output end of multiplexer and the input terminal of signal adapter connect, and the output end of signal adapter and the input terminal of digital signal processor connect；Filter switch is connected between the output end of multiplexer and DC voltage source, and grid is used to receive the switch control signal of controller offer.In touch-control circuit provided by the invention and touch display device, the capacitor on touch-control display panel is detected using multiplexer and filter switch, to reduce influence of the driving noise signal to induction result, so that the induction result of touch-control circuit is more accurate, and then improve the sensitivity of touch display device.
Description
Technical field
The present invention relates to technical field of touch control, in particular to a kind of touch-control circuit and touch display device.
Background technique
In recent years, with the fast development and application of information technology, radio mobile communication and information household appliances, people are to electronics
The dependence of product is growing day by day, more brings flourishing for various display technologies and display device.By touch function and display
Function combines the touch-control display panel formed to be widely used in various products due to the characteristic with human-computer interaction, wraps
Include mobile phone (mobile phone), satellite navigation system (GPS navigator system), tablet computer (tablet
PC), personal digital assistant (PDA), notebook computer (laptop PC) and Medical Devices etc..
Referring to FIG. 1, its structural schematic diagram for the touch-control display panel of the prior art.As shown in Figure 1, existing touch-control
Display panel 100 includes: touch-control circuit 10, capacitor (the first sense wire (X1 to Xn) and the side Y of Cxy11 to Cxynm), X-direction
To the second sense wire (Y1 to Ym), first sense wire and the second sense wire are in criss-cross setting, the capacitor setting
Between first sense wire and the second sense wire, the touch-control circuit 10 is connect with the second sense wire.
When the touch-control display panel 100 works, the first sense wire input signal of X-direction passes through capacitive coupling charge
To the second sense wire of Y-direction, then via the charge variation of the touch-control circuit 10 the second sense wire of induction, and then generate voltage
Signal (Vo_1 to Vo_m).The size variation of capacitor is judged by the variation of voltage signal, then is sentenced by the size variation of capacitor
It is disconnected whether to have touch control operation, to execute the touch-control sensing on the touch-control display panel 100.
However, finding in actual use, the tactile signals that existing touch-control circuit 10 is exported will receive described
The influence of the driving noise signal of touch-control display panel, induction result are inaccurate.
Base this, how to solve the problems, such as existing touch-control circuit it is inaccurate for the induction of touching signals become it is current urgently
Technical problem to be solved.
Summary of the invention
The purpose of the present invention is to provide a kind of touch-control circuit and touch display devices, to solve existing touch-control circuit pair
In the inaccurate problem of the induction of touching signals.
To solve the above problems, the present invention provides a kind of touch-control circuit, the touch-control circuit includes: multiplexer, mistake
Filter switch, signal adapter, digital signal processor and controller；
The multiplexer has multiple input terminals, a plurality of induction on the multiple input terminal and touch-control display panel
Line is corresponded and is connected with each other；The output end of the multiplexer is connect with the input terminal of the signal adapter, described
The output end of signal adapter is connect with the input terminal of the digital signal processor；The filter switch is connected to the multichannel
Between the output end and DC voltage source of multiplexer, grid is used to receive the switch control signal that the controller provides.
Optionally, in the touch-control circuit, the multiplexer includes multiple thin film transistor (TFT)s, the multiple thin
The first electrode of film transistor is all connected to first node, output end of the first node as the multiplexer, institute
The second electrode for stating multiple thin film transistor (TFT)s is corresponded and is connected with each other with a plurality of line of induction on the touch-control display panel,
The grid of each thin film transistor (TFT) is used to receive the scan control signal that the controller provides.
Optionally, in the touch-control circuit, the signal adapter is analog-digital converter.
Optionally, in the touch-control circuit, the signal adapter is comparator；
The comparator has first input end, the second input terminal, signal control terminal and signal output end, and described first is defeated
Enter end to connect with the output end of the multiplexer, second input terminal is connect with DC voltage source, the signal control
The second clock signal provided for receiving the controller is held, the signal output end is defeated with the digital signal processor
Enter end connection.
Optionally, in the touch-control circuit, a compensation is provided between second input terminal and DC voltage source
Circuit, the compensation circuit provide offset voltage for the DC voltage source.
Optionally, in the touch-control circuit, the touch-control circuit further includes a memory, the signal adapter
Output end is connect by the digital signal processor with the memory, and the memory is for reading or being written via described
Signal after digital signal processor processes.
Optionally, in the touch-control circuit, the digital signal processor includes a memory, and the memory is used
In reading or be written via the signal after the digital signal processor processes.
Correspondingly, the touch display device includes: touch-control display surface the present invention also provides a kind of touch display device
Plate, driver and touch-control circuit as described above；
Multiple capacitors, a plurality of line of induction and a plurality of driving line, a plurality of induction are provided on the touch-control display panel
Line and a plurality of driving line are in be arranged in a crisscross manner；One end of a plurality of line of induction is corresponded with the multiple capacitor and phase
It connects, the other end of a plurality of line of induction is corresponded and is connected with each other with multiple input terminals of the touch-control circuit, institute
It states touch-control circuit and senses multiple capacitors on the touch-control display panel by a plurality of line of induction；The a plurality of driving line is equal
It is connect with the driver, the driver provides display driving letter to the touch-control display panel by a plurality of driving line
Number.
Optionally, in the touch display device, the filter switch and the multiplexer it is multiple thin
Film transistor is all set in the array substrate of the touch-control display panel.
Optionally, in the touch display device, the display drive signals are synchronous with driving signal is touched.
In touch-control circuit provided by the invention and touch display device, detected using multiplexer and filter switch
Capacitor on touch-control display panel, so that influence of the driving noise signal to induction result is reduced, so that the touch-control circuit
It is more accurate to incude result, so that the sensitivity of the touch display device is more preferably.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the touch-control display panel of the prior art；
Fig. 2 is the structural schematic diagram 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.
Specific embodiment
Below in conjunction with the drawings and specific embodiments to a kind of touch-control circuit proposed by the present invention and touch display device make into
One step is described in detail.According to following explanation and claims, advantages and features of the invention will be become apparent from.It should be noted that
Attached drawing is all made of very simplified form and using non-accurate ratio, only to convenient, lucidly aid illustration is of the invention
The purpose of embodiment.
Referring to FIG. 2, its structural schematic diagram for the touch display device of the embodiment of the present invention.As shown in Fig. 2, the touching
Controlling circuit 20 includes: multiplexer 21, filter switch TS, signal adapter 23, digital signal processor DSP and controller
25；The multiplexer 21 has multiple input terminals, a plurality of line of induction on the multiple input terminal and touch-control display panel
It corresponds and is connected with each other；The output end of the multiplexer 21 is connect with the input terminal of the signal adapter 23, institute
The output end for stating signal adapter 23 is connect with the input terminal of the digital signal processor DSP；The filter switch TS connection
Between the output end and DC voltage source VS of the multiplexer 21, grid is used to receive what the controller 25 provided
Switch control signal SW.
Specifically, the multiplexer 21 includes multiple thin film transistor (TFT)s (T1 to TN), the multiple thin film transistor (TFT)
First electrode be all connected to first node N1, output end of the first node N1 as the multiplexer 21 is described
The second electrode of multiple thin film transistor (TFT)s is corresponded and is connected with each other with a plurality of line of induction on the touch-control display panel, often
The grid of a thin film transistor (TFT) is used to receive the scan control signal that the controller 25 provides.
Referring to FIG. 3, its schematic diagram for the touch display device of the embodiment of the present invention.As shown in figure 3, in the multichannel
In multiplexer 21, first film transistor T1 is controlled by the first scan control signal S1, and the second thin film transistor (TFT) T2 is swept by second
Control signal S2 control is retouched, and so on, N thin film transistor TN is controlled by N scan control signal SN.
Please continue to refer to Fig. 2 or Fig. 3, the output end of the first electrode of the filter switch TS and the multiplexer 21
Connection, the second electrode of the filter switch TS connect with DC voltage source VS, the on and off of the filter switch TS by
The control of switch control signal SW.Wherein, DC voltage source VS is generally low level voltage source, the electricity of the DC voltage source VS
Pressure value and ground voltage GND are close.
Above-mentioned first electrode and second electrode are different electrode.For example, when first electrode is arranged to source electrode, second
Electrode is arranged to drain.
In the present embodiment, the signal adapter 23 is comparator.As shown in figure 3, the comparator has the first input
Hold a1, the second input terminal a2, signal control terminal CK and signal output end out, the first input end a1 and the multiplexing
The output end of device 21 connects, and the second input terminal a2 is connect with DC voltage source VS, and the signal control terminal CK is for receiving
Second clock the signal CK2, the signal output end out that the controller 25 provides and the digital signal processor DSP
Input terminal connection.
Preferably, a compensation circuit, the compensation electricity are provided between the second input terminal a2 and DC voltage source VS
Road provides offset voltage VTH for the DC voltage source VS.
In other embodiments, the signal adapter 23 can use analog-digital converter (ADC) or other classes
The signal adapter part of type, as long as can choose received analog signal in a manner of 0 or 1.
In the present embodiment, the touch-control circuit 20 further includes a memory 27, and the output end of the signal adapter 23 is logical
It crosses digital signal processor DSP to connect with memory 27, the memory 27 is used to reading or being written the number after being filtered
Word signal.
In other embodiments, the digital signal processor DSP with memory, as described touch-control can be directly used
In addition memory need not be set in circuit 20, structure is simpler.
Incorporated by reference to reference Fig. 3 and Fig. 4, during touch-control sensing, the controller 25 provides the first clock signal CK1,
The driving superimposed signal of noise signal VN caused by the driving signal VD and display drive signals VT is touched to start to be applied to
Second node N2, according to scan control signal, (S1 to SN) detects the capacitor on touch-control display panel to the multiplexer 21
(C1 to CN) and the output test result in the form of analog signal, the signal adapter 23 receives analog signal, and will receive
To analog signal be converted into digital signal (0 or 1), it is defeated that the digital signal processor DSP receives the signal adapter 23
Digital signal out, and the digital signal is filtered, the memory is written in the digital signal after filtering processing
27.In the process, the detection knot that the filter switch TS exports the multiplexer 21 according to switch control signal SW
Fruit is adjusted, and reduces the influence of driving noise signal VN.
In the present embodiment, the capacitor on touch-control display panel is detected by the multiplexer 21 and filter switch TS
(C1 to CN) can reduce influence of the driving noise signal VN to induction result, so that the induction of the touch-control circuit 20
As a result more accurate.
Correspondingly, the present invention also provides a kind of touch display devices.Incorporated by reference to referring to figs. 2 and 3, the touch-control is shown
Device 200 includes: touch-control display panel 30, driver 40 and touch-control circuit 20 as described above；The touch-control display panel
Be provided on 30 multiple capacitors (C1 to CN), a plurality of line of induction (SL1 to SLN) and a plurality of driving line (DL1 to DLM), it is described more
((DL1 to DLM) in being arranged in a crisscross manner for SL1 to SLN) and a plurality of driving line for the line of induction；(SL1 is extremely for a plurality of line of induction
SLN (C1 to CN) is corresponded and is connected with each other, and (SL1 is to SLN's) for a plurality of line of induction with the multiple capacitor for one end)
Multiple input terminals of the other end and the touch-control circuit 20 are corresponded and are connected with each other, and the touch-control circuit 20 passes through described more
(SL1 to SLN) senses multiple capacitors (C1 to CN) on the touch-control display panel 30 for the line of induction；The a plurality of driving line
(DL1 to DLM) is connect with the driver 40, and the driver 40 passes through a plurality of driving line (DL1 to DLM) Xiang Suoshu
Touch-control display panel 30 provides display drive signals VT.
Specifically, ((C1 is extremely for multiple capacitors on SL1 to SLN) and the touch-control display panel 30 for a plurality of line of induction
CN first electrode) is corresponded and is connected with each other, and (SL1 to SLN) is used for the touch-control display surface a plurality of line of induction
Touch signal on plate 30 passes to multiple input terminals (multiple inputs of the i.e. described multiplexer 21 of the touch-control circuit 20
End).
Preferably, (T1 to TN) and filter switch TS is all set in multiple thin film transistor (TFT)s of the multiplexer 21
In the array substrate of the touch-control display panel 30.
As shown in figure 3, (second electrode of C1 to CN) are all connected to second node N2, second section to the multiple capacitor
Caused by input terminal of the point N2 as touch driving signal VD, the touch driving signal VD and the display drive signals VT
The input terminal for touching driving signal VD is applied to after driving noise signal VN superposition.Wherein, the touch driving signal VD
It is synchronous with the display drive signals VT.
In the present embodiment, the touch display device uses the touch-control circuit 20, by 20 institute of touch-control circuit
The tactile signals of output will not be driven the influence of noise signal VN substantially, therefore sensitivity is more preferably.
To sum up, in touch-control circuit provided by the invention and touch display device, multiplexer and filter switch are utilized
The capacitor on touch-control display panel is detected, so that influence of the driving noise signal to induction result is reduced, so that the touch-control
The induction result of circuit is more accurate, and then improves the sensitivity of the touch display device.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (7)
1. a kind of touch-control circuit characterized by comprising multiplexer, filter switch, signal adapter, at digital signal
Manage device and controller；
The multiplexer has multiple input terminals, a plurality of line of induction one on the multiple input terminal and touch-control display panel
One corresponds to and is connected with each other；The output end of the multiplexer is connect with the input terminal of the signal adapter, the signal
The output end of converter is connect with the input terminal of the digital signal processor；The filter switch is connected to the multiplexing
Between the output end and DC voltage source of device, grid is used to receive the switch control signal that the controller provides；
The signal adapter is comparator；The comparator has first input end, the second input terminal, signal control terminal and letter
Number output end, the first input end are connect with the output end of the multiplexer, second input terminal and DC voltage
Source connection, the signal control terminal are used to receive the second clock signal that the controller provides, the signal output end and institute
State the input terminal connection of digital signal processor；
A compensation circuit is provided between second input terminal and DC voltage source, the compensation circuit is the DC voltage
Source provides offset voltage.
2. touch-control circuit as described in claim 1, which is characterized in that the multiplexer includes multiple thin film transistor (TFT)s,
The first electrode of the multiple thin film transistor (TFT) is all connected to first node, and the first node is as the multiplexer
The a plurality of line of induction on output end, the second electrode of the multiple thin film transistor (TFT) and the touch-control display panel corresponds simultaneously
It is connected with each other, the grid of each thin film transistor (TFT) is used to receive the scan control signal that the controller provides.
3. touch-control circuit as claimed in claim 1 or 2, which is characterized in that the touch-control circuit further includes a memory, described
The output end of signal adapter connect by the digital signal processor with the memory, the memory be used for reading or
Write-in is via the signal after the digital signal processor processes.
4. touch-control circuit as described in claim 1, which is characterized in that the digital signal processor includes a memory, institute
Memory is stated for reading or being written via the signal after the digital signal processor processes.
5. a kind of touch display device characterized by comprising touch-control display panel, driver and such as Claims 1-4
Any one of described in touch-control circuit；
Be provided with multiple capacitors, a plurality of line of induction and a plurality of driving line on the touch-control display panel, a plurality of line of induction with
A plurality of driving line is in be arranged in a crisscross manner；One end of a plurality of line of induction corresponds with the multiple capacitor and mutually interconnects
It connects, the other end of a plurality of line of induction is corresponded and is connected with each other with multiple input terminals of the touch-control circuit, the touching
Control circuit senses multiple capacitors on the touch-control display panel by a plurality of line of induction；The a plurality of driving line is and institute
Driver connection is stated, the driver provides display drive signals to the touch-control display panel by a plurality of driving line.
6. touch display device as claimed in claim 5, which is characterized in that the filter switch and the multiplexer
Multiple thin film transistor (TFT)s be all set in the array substrate of the touch-control display panel.
7. touch display device as claimed in claim 5, which is characterized in that the display drive signals and touch driving signal
It is synchronous.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510991761.2A CN105404429B (en) | 2015-12-24 | 2015-12-24 | Touch-control circuit and touch display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510991761.2A CN105404429B (en) | 2015-12-24 | 2015-12-24 | Touch-control circuit and touch display device |
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| Publication Number | Publication Date |
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| CN105404429A CN105404429A (en) | 2016-03-16 |
| CN105404429B true CN105404429B (en) | 2019-03-26 |
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| CN201510991761.2A Active CN105404429B (en) | 2015-12-24 | 2015-12-24 | Touch-control circuit and touch display device |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106297660B (en) * | 2016-09-05 | 2017-12-05 | 京东方科技集团股份有限公司 | A kind of image element circuit and its driving method, display panel and display device |
| US10133405B2 (en) * | 2016-11-11 | 2018-11-20 | Solomon Systech (Shenzhen) Limited | Reconfigurable touch sensing for touch-display panel |
| WO2019157735A1 (en) * | 2018-02-14 | 2019-08-22 | 深圳市为通博科技有限责任公司 | Touch controller, touch display system, and touch display synchronization method |
| CN109324711B (en) * | 2018-08-17 | 2022-06-21 | 北京集创北方科技股份有限公司 | Data processing method and device |
| TWI703480B (en) * | 2019-05-07 | 2020-09-01 | 友達光電股份有限公司 | Touch display apparatus |
| CN110727319A (en) * | 2019-09-30 | 2020-01-24 | 深圳市叉义科技有限公司 | Display with control device |
| CN114647341A (en) * | 2022-03-29 | 2022-06-21 | 京东方科技集团股份有限公司 | Touch chip, control method of touch chip, display panel and display device |
| 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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| CN102725715A (en) * | 2009-10-20 | 2012-10-10 | 赛普拉斯半导体公司 | Method and apparatus for reducing coupled noise influence in touch screen controllers |
| CN102955605A (en) * | 2011-08-17 | 2013-03-06 | 瑞鼎科技股份有限公司 | Touch sensing device and method thereof |
| CN103376937A (en) * | 2012-04-17 | 2013-10-30 | 瑞鼎科技股份有限公司 | Method for controlling noise processing circuit of touch panel and signal processing device |
| CN104765519A (en) * | 2015-04-27 | 2015-07-08 | 京东方科技集团股份有限公司 | Touch detection circuit and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104765507B (en) * | 2015-05-08 | 2018-06-05 | 上海天马微电子有限公司 | Filter circuit and touch display device |
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- 2015-12-24 CN CN201510991761.2A patent/CN105404429B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102725715A (en) * | 2009-10-20 | 2012-10-10 | 赛普拉斯半导体公司 | Method and apparatus for reducing coupled noise influence in touch screen controllers |
| CN102955605A (en) * | 2011-08-17 | 2013-03-06 | 瑞鼎科技股份有限公司 | Touch sensing device and method thereof |
| CN103376937A (en) * | 2012-04-17 | 2013-10-30 | 瑞鼎科技股份有限公司 | Method for controlling noise processing circuit of touch panel and signal processing device |
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| CN105404429A (en) | 2016-03-16 |
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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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