CN106886332A - The driving method of touch display screen, drive device and touch display unit - Google Patents
The driving method of touch display screen, drive device and touch display unit Download PDFInfo
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- CN106886332A CN106886332A CN201710025554.0A CN201710025554A CN106886332A CN 106886332 A CN106886332 A CN 106886332A CN 201710025554 A CN201710025554 A CN 201710025554A CN 106886332 A CN106886332 A CN 106886332A
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- touch
- scanning
- display
- signal
- display screen
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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
Abstract
Disclose a kind of driving method of touch display screen, drive device and touch display unit.The driving method includes：Carry out touching scanning and carry out display scanning by applying display scanning signal to touch display screen by applying to touch scanning signal to touch display screen, and display scanning signal is received while applying to touch scanning signal；For each display scanning signal, at least multiple scanning T+ △ T moment corresponding touch scanning area, display scanning signal includes at least one of gate drive signal and source data signal, T represents the reception time of each display scanning signal, and △ T represent under no touch state the time interval of noise occur from the touch detection signal that display scanning signal is received to touch display screen is received.The driving method finds the corresponding scanning area of touch detection signal being interfered according to signal sequence relation, carries out multiple scanning, solves the problems, such as to cause to touch scanning accuracy reduction because of display scanning signal interference.
Description
Technical field
The present invention relates to touch display technology field, especially a kind of driving method of touch display screen, drive device and
Touch display unit.
Background technology
Existing touch display screen is that just capacitive touch screen and LCDs are integrated to be made, and capacitive touch
Touching screen can be covered on LCDs or be embedded in the liquid crystal layer of LCDs.
As shown in figure 1, LCDs includes gate drivers 310, source electrode driver 410 and and gate drivers
The a plurality of controlling grid scan line of 310 connections and a plurality of source electrode scan line of the connection of source electrode driver 410.In each frame period, lead to
The control for crossing gate drivers 310 sends grid voltage G1-Gm to a plurality of controlling grid scan line successively, is gated via controlling grid scan line
The thin film transistor (TFT) T of each pixel cell, and apply the gray scale voltage S1-Sn corresponding with GTG via source electrode scan line
To pixel capacitance CLC, so as to change the orientation of liquid crystal molecule to realize corresponding GTG, m, n are the integer more than 0.
Similarly, the electrode of touch-screen includes the touch drives line of a plurality of horizontally set and a plurality of longitudinally disposed touch sense
Answer line.During the detection and localization of touch point, progressively scanned to touching drives line, and thread touch sensor scanned by column,
Just the crosspoint that every touches drives line and every thread touch sensor can be all scanned, whereby it can be detected that scanning process
The position of middle touch point.
For display scanning and touching scanning, it is each independent to show sweep phase and touch sweep phase.But
It is that, because display scanning is that controlling grid scan line is scanned, touching scanning is scanned to touching drives line, touches scanning
Speed to be faster than display scanning speed, which results in sometime show scanning area and touch scanning area can occur
It is overlapping, and then touch noise will be produced at this moment for occurring to overlap, so as to influence to touch the precision for scanning.
Part prior art avoids display from scanning to touching by the way of touch scanning and display scanning timesharing are carried out
The interference of scanning.That is, when carrying out display scanning, pause touch detection scanning；Carry out touch detection scanning when
Wait, pause liquid crystal display scanning.This mode usually requires that there is identical to scan frame per second for touch detection and liquid crystal display, or
Into the scanning frame per second of multiple proportion, control is not very flexible.And for high-resolution liquid crystal display, display scan lines columns
Increase the display sweep time, it is necessary to longer, the time for leaving touch-control scanning for will be very short, and this can reduce the property of touch control detection
Energy.
Therefore the driving method of touch display screen awaits further lifting.
The content of the invention
In view of the above problems, it is an object of the invention to provide a kind of driving method, driving dress for touch display screen
Put and touch display unit, scanning area is touched by multiple scanning, solve causes to touch because display scanning interference touches scanning
Touch the problem of scanning accuracy reduction.
A kind of first aspect according to embodiments of the present invention, there is provided driving method of touch display screen, including：
Carry out touching scanning and apply by touch display screen by applying to touch scanning signal to touch display screen
Show scanning signal to carry out display scanning, and display scanning signal is received while applying to touch scanning signal；
For each display scanning signal, at least multiple scanning T+ △ T moment corresponding touch scanning area, wherein described
Display scanning signal includes at least one of gate drive signal and source data signal, and T represents described each display scanning
The reception time of signal, △ T are represented under no touch state from receiving display scanning signal to being received from touch display screen
Occurs the time interval of noise in touch detection signal.
Preferably, also including calculating △ T by following operation：
Under no touch state, touch display screen touch scanning and display scanning and received from touch display screen to touch
Detection signal is touched, and display scanning signal is received while scanning is touched；
Each the touch detection signal for the appearance noise that calculating is received and the display scanning for receiving the last before this
Time interval △ T1 ... ... the △ Tn, wherein n of signal are the integer more than 1；And
By △ T1 ... △ Tn obtain △ T after being averaging.
Preferably, the multiple scanning is performed after T+ △ T moment corresponding touch scanning area is scanned through.
Preferably, the multiple scanning is performed after the current touch scan period terminates.
Preferably, it is described for each display scanning signal at least multiple scanning T+ △ T moment corresponding touch scanning area
Domain includes：Multiple scanning T+ △ T moment corresponding touch scanning area and the T+ △ T moment corresponding touch scanning area
Previous touch scanning area.
Preferably, the touch display screen includes a plurality of touch drives line and a plurality of thread touch sensor, and every touches driving
One touch scanning area of line correspondence.
Preferably, the adjacent touch scanning area has lap.
A kind of second aspect according to embodiments of the present invention, there is provided drive device of touch display screen, including：
Display scan module, display scanning is carried out by applying display scanning signal to touch display screen；
Scan module is touched, by applying to touch scanning signal to touch display screen touch scanning and applying to touch
Display scanning signal is received while touching scanning signal, for each display scanning signal, at least multiple scanning T+ △ T moment pair
The touch scanning area answered, wherein the display scanning signal includes at least in gate drive signal and source data signal
Individual, T represents the reception time of each display scanning signal, and △ T are represented under no touch state from receiving display scanning letter
There is the time interval of noise in number touch detection signal received to touch display screen.
Preferably, the touch scan module is additionally operable under no touch state that touch display screen is carried out to touch scanning simultaneously
Touch detection signal is received from touch display screen, display scanning signal is received while scanning is touched, calculating receives appearance
Each touch detection signal of noise and before this time interval △ of the last display scanning signal for receiving
T1 ... ... △ Tn, obtain △ T after △ T1 ... ... △ Tn are averaging, wherein n is the integer more than 1.
Preferably, the touch scan module performs described after T+ △ T moment corresponding touch scanning area is scanned through
Multiple scanning.
Preferably, the touch scan module performs the multiple scanning after the current touch scan period terminates.
Preferably, the touch scan module is corresponding tactile for each display scanning signal multiple scanning T+ △ T moment
Touch scanning area and the T+ △ T moment corresponding previous touch scanning area for touching scanning area.
A kind of third aspect according to embodiments of the present invention, there is provided touch display screen, including：Touch display screen, including it is many
Bar touches drives line and a plurality of controlling grid scan line, and every touches one touch scanning area of drives line correspondence, every gated sweep
One display scanning area of line correspondence；With above-mentioned touch drive device.
The driving method finds the time relationship for the touch detection signal of noise and display scanning signal occur, and then finds
The corresponding scanning area of touch detection signal, carries out multiple scanning, solves because display scanning signal interference causes touch to be swept
The problem of precision reduction is retouched, touch-control sensitivity is improve.
Brief description of the drawings
By description referring to the drawings to the embodiment of the present invention, of the invention above-mentioned and other purposes, feature and
Advantage will be apparent from.
Fig. 1 is the equivalent circuit diagram of the LCDs according to prior art.
Fig. 2 shows the relation of the display scanning area and touch display screen in the embodiment of the present invention.
Fig. 3 shows the relation of the touch scanning area and touch display screen in the embodiment of the present invention.
Fig. 4 is the schematic diagram of touch display unit according to embodiments of the present invention.
Fig. 5 is the flow chart of the driving method of touch display screen according to embodiments of the present invention.
Specific embodiment
Various embodiments of the present invention are more fully described hereinafter with reference to accompanying drawing.In various figures, identical element
Represented using same or similar reference.For the sake of clarity, the various pieces in accompanying drawing are not necessarily to scale.
With reference to the accompanying drawings and examples, specific embodiment of the invention is described in further detail.
Fig. 2 shows the relation of the display scanning area and touch display screen in the embodiment of the present invention.
Touch display screen 200 includes a plurality of raster data model line, in every raster data model line correspondence touch display screen 200 one
Individual display scanning area 22.Display scanning area 22 can include one-row pixels unit, and multiple display scanning area 22 will be touched
Display screen is completely covered.There can be lap between adjacent display scanning area 22, it is also possible to without lap, depend on
Being manufactured in actual production needs.
Fig. 3 shows the relation of the touch scanning area and touch display screen in the embodiment of the present invention.
Touch display screen 300 includes a plurality of touch drives line, every touched in drives line correspondence touch display screen 300
Individual touch scanning area 23.Multiple touches scanning area 23 and touch display screen is completely covered.Adjacent touch scanning area 23
Between can have lap, it is also possible to without lap, being manufactured depending on actual production needs.
It should be pointed out that Fig. 2 and Fig. 3 are served only for schematical explanation, originally can not illustrate to touch accordingly scanning area and
Show the quantity or size of scanning area, and proportionate relationship between the two.
Generally, one touches the multiple display scanning areas of scanning area correspondence, touches sweep speed more than display
Sweep speed, therefore the scan period is touched less than the display scan period.When scanning is touched and display scanning is each independently carried out,
Touching scanning may be disturbed in certain region by display scanning, so that making an uproar occurs in the touch detection signal for detecting
Sound.
The embodiment of the present invention proposes a kind of driving method for touch display screen, drive device and touches display dress
Put, scanning area is touched by multiple scanning, solve causes to touch scanning accuracy reduction because display scanning interference touches scanning
Problem.
Fig. 4 is the schematic diagram of touch display unit according to embodiments of the present invention, including touch display screen 400 and driving is filled
400' is put, drive device 400' further includes display scan module 410 ' and touches scan module 420 '.
A plurality of controlling grid scan line, source electrode scan line are provided with touch display screen 400, drives line and touch sensible is touched
Line.Display scan module 410 ' sends gate drive signal in real time to controlling grid scan line and source electrode scan line and source drive is believed
Number, controlling grid scan line and source electrode scan line real-time reception gate drive signal and source drive signal, and then gate film crystal
Pipe, realizes the gray scale voltage on pixel capacitance.Touch scan module 420 ' and send touch drive signal to touch drives line in real time,
And obtain touch detection signal in real time from thread touch sensor, so that it is determined that the position of touch point.Additionally, touching scan module 420 '
Also from display scan module 410 ' real-time reception display scanning signal, the display scanning signal can for gate drive signal,
Source drive signal, the intersection of gate drive signal and source drive signal or by gate drive signal and source drive
The signal that signal carries out signal transacting and obtains.Touch scan module 420 ' for receive each display scanning signal, really
Fixed its reception time adds the touch scanning area that should be scanned during duration △ T, and the multiple scanning region.Wherein △ T indicate without
From receiving display scanning signal to there is noise in the touch detection signal received from touch display screen under touch condition
Time interval.
In addition, in this embodiment, the scan mode of display scan module 410 ' and touch scan module 420 ' is not construed as limiting.
For example, it can progressively scan each display or touch scanning area, it is also possible to which each display of interlacing scan touches scanning area
Domain.
Specifically used form further illustrates the method for operation of drive device 400' below, and the wherein moment represents and receives each
The time point of display scanning signal or touch detection signal.
As shown above, in T0, T4 the and T7 moment receives display scanning signal S0-S2 to drive device 400', in T0-T8
Receive touch detection signal P0-P8 quarters respectively, corresponding touch scanning area is A-I, at the T0 moment for receiving S0 signals, drive
Device 400' knows that the T0+ △ T moment touches scanning and can scan touch scanning area D, at the T4 moment for receiving S1 signals, drives dress
Put 400' and know that the T4+ △ T moment can scan touch scanning area H, then drive device 400' multiple scannings D and H.
Significantly, since drive device 400' performed one touch the scan period after can pause one section when
Between, then perform next cycle, then the T+ △ T moment be likely to be between two cycles, at this moment drive device 400' is not carried out
Scanning, then the T+ △ T moment also not correspond to any touch scanning area.That is, not every display scanning signal
Touch detection signal will be formed and disturbed.
In alternative embodiments, above-mentioned touch drive device according to A, hold by the order of B, C, D, D, E, F, G, H, H, I
Row scanning.Further, scanning not only multiple scanning region D and H, and scanning D, scanned region before H are touched, that is, is touched
Drive device is touched according to A, the order of B, C, D, C, D, E, F, G, H, G, H, I performs scanning.
In another optional implementation method, above-mentioned touch drive device according to A, B, C, D, E, F, G, H, I, D, H's
Order performs scanning.Wherein, execution will not be to touching the scan period between the step of multiple scanning touches the scan period at two
Impact.Further, scanning not only multiple scanning region D and H is touched, and scans D, scanned region before H, i.e.,
Drive device is touched according to A, the order of B, C, D, E, F, G, H, I, C, D, G, H performs scanning.
In the above-described embodiments, display scan module 410 ' and touch scan module 420 ' can be integrated in a chip
On, it is also possible to adhere to separately on two chips.
In addition, above-mentioned △ T can be obtained by experimental calculation.For example, (for example, in test of dispatching from the factory under no touch state
When), display scan module 410 ' can apply display scanning signal to carry out display scanning to touch display screen, touch scanning mould
Block 420 ' applies to touch scanning signal touch scanning and obtain touch detection from touch display screen believing to touch display screen
Number, scan module 420 ' is touched while applying to touch scanning signal from the real-time reception display scanning of display scan module 410 '
Signal.When finding that noise occurs in touch detection signal, calculate the reception time of the touch detection signal and receive recently before this
Display scanning signal the reception time between time interval △ T1.Detected by multiple identical, obtain △ T1 to △ Tn,
By △ T1 to △ Tn it is average after obtain duration △ T, for representing under no touch state from receiving display scanning signal to from touching
Touch time interval the △ T, wherein n for noise occur in the touch detection signal that display screen is received and represent detection number of times.Certainly originally
Disclosed embodiment not limited to this, for example, only can detect once, it is also possible to after detection repeatedly between the selection time wherein once
Every value as △ T, or △ T can be obtained by carrying out other mathematical computations to △ T1 to △ Tn.In certain embodiments,
△ T can also be the empirical value of setting.
Fig. 5 is the flow chart of the driving method of touch display screen according to embodiments of the present invention.
With reference to Fig. 5, the driving method includes the following steps that circulation is performed.
In step S01, applying touch scanning signal to touch display screen carries out touch scanning, applies to touch display screen
Display scanning signal carries out display scanning, and display scanning signal is received while applying to touch scanning signal.
In step S02, for each display scanning signal, at least multiple scanning T+ △ T moment corresponding touch is scanned
Region.Here, display scanning signal includes at least one of gate drive signal and source data signal, and T represents described every
The reception time of individual display scanning signal, Δ T is represented under no touch state from receiving display scanning signal to touch display screen
There is the time interval of noise in the touch detection signal for receiving.
Understood with above-mentioned touch display unit contrast, above-mentioned driving method is swept in touch scan module and display respectively
Retouch execution in module.Moreover, it is noted that some steps for touching scan module are concurrently performed, for example, touching aobvious
Showing device synchronously receives display scanning signal and sends and touches drive signal, and calculates the reception of each display scanning signal simultaneously
Time adds the corresponding touch scanning areas of △ T.
In above-mentioned steps, multiple scanning mode is not defined.For example, touch display unit is scanning through a T+
After the △ T moment touches the corresponding scanning area of scanning, the T+ △ T moment of multiple scanning immediately touches the corresponding scanning area of scanning
Domain.Again for example, touch display unit is after the current touch scan period terminates, the multiple scanning T+ △ T moment touches scanning
Corresponding scanning area.For example, touching scanning means, not only the multiple scanning T+ △ T moment touches the corresponding scanning area of scanning again
Domain, also scans previous scanning area.
The driving method of touch display screen provided in an embodiment of the present invention, △ is obtained by repeated detection under no touch state
T, for each display scanning signal, at least multiple scanning T+ △ T moment corresponding touch scanning area.The driving method is solved
Because display scanning signal interference causes to touch the problem of scanning accuracy reduction, touch-control sensitivity is improve.
According to embodiments of the invention as described above, these embodiments do not have all of details of detailed descriptionthe, not yet
It is only described specific embodiment to limit the invention.Obviously, as described above, can make many modifications and variations.This explanation
Book is chosen and specifically describes these embodiments, is in order to preferably explain principle of the invention and practical application, so that affiliated
Technical field technical staff can be used using modification of the invention and on the basis of the present invention well.Protection model of the invention
The scope that enclosing should be defined by the claims in the present invention is defined.
Claims (13)
1. a kind of driving method of touch display screen, including：
Carry out touching scanning and apply display by touch display screen by applying to touch scanning signal to touch display screen
Scanning signal carries out display scanning, and receives display scanning signal while applying to touch scanning signal；
For each display scanning signal, at least multiple scanning T+ △ T moment corresponding touch scanning area, wherein the display
Scanning signal includes at least one of gate drive signal and source data signal, and T represents described each display scanning signal
The reception time, △ T are represented under no touch state from receiving display scanning signal to the touch received from touch display screen
Occurs the time interval of noise in detection signal.
2. driving method according to claim 1, also including calculating △ T by following operation：
Under no touch state, touch display screen touch scanning and display scanning and received from touch display screen to touch inspection
Signal is surveyed, and display scanning signal is received while scanning is touched；
Each the touch detection signal for the appearance noise that calculating is received and the before this last display scanning signal for receiving
Time interval △ T1 ... ... △ Tn, wherein n be the integer more than 1；And
By △ T1 ... △ Tn obtain △ T after being averaging.
3. driving method according to claim 1, wherein, the multiple scanning is to scan through the T+ △ T moment corresponding
Performed after touch scanning area.
4. driving method according to claim 1, wherein, the multiple scanning was terminated in the current touch scan period
Perform afterwards.
5. driving method according to claim 1, wherein, it is described for each display scanning signal at least multiple scanning T+
The △ T moment, the corresponding scanning area that touches included：Multiple scanning T+ △ T moment corresponding touch scanning area and the T+ △
The T moment corresponding previous touch scanning area for touching scanning area.
6. driving method according to claim 1, wherein, the touch display screen includes a plurality of touch drives line and a plurality of
Thread touch sensor, every touches one touch scanning area of drives line correspondence.
7. driving method according to claim 6, wherein, the adjacent touch scanning area has lap.
8. a kind of drive device of touch display screen, including：
Display scan module, display scanning is carried out by applying display scanning signal to touch display screen；
Scan module is touched, is carried out touching scanning and is swept touch is applied by applying to touch scanning signal to touch display screen
Display scanning signal is received while retouching signal, for each display scanning signal, at least multiple scanning T+ △ T moment is corresponding
Scanning area is touched, wherein the display scanning signal includes at least one of gate drive signal and source data signal, T
Represent the reception time of each display scanning signal, △ T represent under no touch state from receive display scanning signal to
There is the time interval of noise in the touch detection signal that touch display screen is received.
9. drive device according to claim 8, the touch scan module is additionally operable under no touch state to touching
Display screen is carried out touching scanning and receives touch detection signal from touch display screen, and display scanning is received while scanning is touched
Signal, calculating is received there is each touch detection signal of noise and the display scanning letter for receiving the last before this
Number time interval △ T1 ... ... △ Tn, after △ T1 ... ... △ Tn are averaging obtain △ T, wherein n is the integer more than 1.
10. drive device according to claim 8, wherein, the touch scan module is scanning through T+ △ T moment correspondence
Touch scanning area after perform the multiple scanning.
11. drive devices according to claim 8, wherein, the touch scan module is in the current touch scan period
The multiple scanning is performed after end.
12. drive devices according to claim 8, wherein, the touch scan module is for each display scanning signal
The multiple scanning T+ △ T moment it is corresponding touch scanning area and the T+ △ T moment it is corresponding touch scanning area it is previous
Individual touch scanning area.
A kind of 13. touch display units, including：
Touch display screen；And
Drive device according to any one of claim 8 to 12.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710025554.0A CN106886332B (en) | 2017-01-13 | 2017-01-13 | Driving method and driving device of touch display screen and touch display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710025554.0A CN106886332B (en) | 2017-01-13 | 2017-01-13 | Driving method and driving device of touch display screen and touch display device |
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| CN106886332B CN106886332B (en) | 2020-02-21 |
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| CN101937295A (en) * | 2009-06-29 | 2011-01-05 | 索尼公司 | Method of driving touch panel, capacitance-type touch panel, and display apparatus |
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| US20130201146A1 (en) * | 2010-01-04 | 2013-08-08 | Plastic Logic Limited | Touch-sensing systems |
| CN104199573A (en) * | 2014-08-26 | 2014-12-10 | 京东方科技集团股份有限公司 | Touch driving method, touch driving device and touch display screen |
| CN104699319A (en) * | 2015-04-01 | 2015-06-10 | 上海天马微电子有限公司 | Touch display panel and driving method thereof |
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|---|---|---|---|---|
| CN101937295A (en) * | 2009-06-29 | 2011-01-05 | 索尼公司 | Method of driving touch panel, capacitance-type touch panel, and display apparatus |
| US20130201146A1 (en) * | 2010-01-04 | 2013-08-08 | Plastic Logic Limited | Touch-sensing systems |
| CN102467281A (en) * | 2010-11-15 | 2012-05-23 | 联咏科技股份有限公司 | Touch controller of touch display device and drive method thereof |
| CN104199573A (en) * | 2014-08-26 | 2014-12-10 | 京东方科技集团股份有限公司 | Touch driving method, touch driving device and touch display screen |
| CN104699319A (en) * | 2015-04-01 | 2015-06-10 | 上海天马微电子有限公司 | Touch display panel and driving method thereof |
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| Publication number | Publication date |
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| CN106886332B (en) | 2020-02-21 |
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