CN103309486B - Touch display unit and touch position detecting method thereof and system - Google Patents
Touch display unit and touch position detecting method thereof and system Download PDFInfo
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- CN103309486B CN103309486B CN201210065565.9A CN201210065565A CN103309486B CN 103309486 B CN103309486 B CN 103309486B CN 201210065565 A CN201210065565 A CN 201210065565A CN 103309486 B CN103309486 B CN 103309486B
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Abstract
The invention discloses a kind of touch display unit and touch position detecting method thereof and system, this display device is used for showing still image, each of which pel array includes multiple picture element matrix unit, each picture element matrix unit includes the multiple pixels in matrix arrangement, the method includes: according to the scan mode of scan line, timesharing ground is measured the electric current on the data wire being connected with each pixel in each picture element matrix unit and is integrated, and obtains charging charge total amount Q of each picture element matrix unit；Charging charge total amount Q of each picture element matrix unit timesharing measurement obtained and this picture element matrix unit prestored do not occur the charging charge total amount Q ' of touch operation to contrast, if | (Q/Q ') 1 | is more than threshold value P preset, then judge that the picture element matrix unit position of correspondence there occurs touch action.The present invention is compared with prior art, it is not necessary to touch pad pattern is fabricated separately, has saved cost, reduce process complexity.
Description
Technical field
The present invention relates to touch Display Technique field, especially relate to a kind of touch display unit and touch thereof
Method for detecting position and system.
Background technology
Touch display unit of the prior art includes touch liquid crystal display device, touches organic light emitting display
Device and touch Electronic Paper etc., its mode realizing touch function is similar to, and mostly is at respective display floater
Top is separately provided a contact panel (referred to as " external hanging type touch display unit ") again；This touch surface
Plate can be capacitance type touch-control panel, it is also possible to for electric resistance touch-control panel.Concrete, touch with external hanging type
As a example by touching display panels (Liquid crystal disLlay, LCD), i.e. display panels (as
IPS or FFS display panels) color membrane substrates be provided above a capacitive touch including touch pad pattern
Control panel (Capacitive Touch Panel, CTP), is provided above surface at capacitance touching control panel afterwards
Strengthening glass (Cover Lens).This external hanging type touch display panel completes, and at least needs four to arrive
Five layers of glass and the twice hard technique of hard patch, on the one hand add the cost of touch display panel, the opposing party
Face also results in the increase of touch display panel thickness and the loss of binding yield.
In order to solve the problems referred to above, the display panels developing integrated touch controllable function in prior art (claims
Be " integrated touch display device "), be broadly divided into 2 classes, a class is the coloured silk at display panels
The outer surface of film substrate or the outer surface of array base palte make touch pad pattern (such as CN201010526037.X
Described in), in order to the detection of touch-control, another kind of is making touch pad pattern inside display panels.
In prior art, the structure of comparative maturity is inside color membrane substrates and increases corresponding inside array base palte respectively
The circuit structure with touch-control detecting function, in the case of adding complex circuit designs degree, also by
Display drive signals in panel can produce interference to touch-control detectable signal, reduces the accurate of touch-control detection
Property.
The touch display unit of above-mentioned prior art, either external hanging type touch display unit or integrated form
Touch display unit all must be fabricated separately touch pad pattern, and cost is high, complex process.
Summary of the invention
The technical problem to be solved is, the touch display unit of prior art needs to be fabricated separately
Touch pad pattern, cost is high, complex process.
For solving the problems referred to above, embodiments provide following technical scheme:
A kind of touch position detecting method of touch display unit, this display device is used for showing still image,
The many scan lines including pel array and being connected with described pel array and many data lines, described pixel
Array includes multiple picture element matrix unit, and each described picture element matrix unit includes in matrix arrangement many
Individual pixel, the method includes:
According to the scan mode of scan line, timesharing ground is measured and is connected with each pixel in each picture element matrix unit
Data wire on electric current and be integrated, obtain charging charge total amount Q of each picture element matrix unit；
Charging charge total amount Q of each picture element matrix unit that timesharing measurement is obtained and being somebody's turn to do of prestoring
Picture element matrix unit does not occurs the charging charge total amount Q ' of touch operation to contrast, if | (Q/Q ')-1 | is more than
Threshold value P preset, then judge that the picture element matrix unit position of correspondence there occurs touch action.
Preferably, described touch display unit is liquid crystal indicator or organic light-emitting display device or electronics
Paper.
Preferably, described liquid crystal indicator is IPS type liquid crystal indicator or FFS type liquid crystal display dress
Put.
Preferably, there is not the charging charge of touch operation in each picture element matrix unit prestored described in
The acquisition pattern of total amount Q ' is:
The view data input of the still image that will show is to described touch display unit；
In the case of not there is touch operation, according to the scan mode of scan line, timesharing ground measure with
In each picture element matrix unit each pixel be connected data wire on electric current and be integrated, obtain each picture
The charging charge total amount of prime matrix unit, the charging charge of each picture element matrix unit obtained by integration is total
Measure the charging charge total amount Q ' that touch operation does not occurs as corresponding picture element matrix unit.
Preferably, there is not the charging charge of touch operation in each picture element matrix unit prestored described in
The acquisition pattern of total amount Q ' is:
The view data input of the still image that will show is to described touch display unit；
In the case of not there is touch operation, according to the scan mode of scan line, timesharing ground measure with
In each picture element matrix unit each pixel be connected data wire on electric current and be integrated, obtain each picture
The charging charge total amount of prime matrix unit；
The charging charge total amount of each picture element matrix unit is obtained according to above-mentioned steps, repetitive measurement integration
Multiple measured values；
It is calculated the meansigma methods of the multiple measured value of charging charge total amount of each picture element matrix unit, should
The charging charge total amount Q ' of touch operation is there is not in meansigma methods as corresponding picture element matrix unit.
Preferably, described method also includes the charged electrical that all picture element matrix unit do not occur touch operation
Lotus total amount Q ' is stored in a storage matrix, the corresponding pixel square of data in described storage matrix
The charging charge total amount of array element.
Preferably, in the corresponding described display device of the abscissa of described storage matrix with picture element matrix unit even
The position of the data wire connect, the scanning being connected with picture element matrix unit in the corresponding described display device of vertical coordinate
The position of line, a certain data position in the storage matrix picture element matrix unit corresponding with these data is aobvious
Position one_to_one corresponding on showing device.
Preferably, the area of single picture element matrix unit is essentially identical with the resolution of touch operation, described
When for there is touch operation in the resolution of touch operation, connecing of the display screen of pointer and described display device
Contacting surface is amassed；The change of the to-noise ratio that the change of the charging charge total amount of single picture element matrix unit causes is more than
The change of the to-noise ratio that noise causes.
Preferably, each picture element matrix unit includes in M × multiple pixels of N matrix arrangement, M, N are equal
For positive integer.
Preferably, M=N.
Preferably, the span of threshold value P preset is between 5%～25%.
The embodiment of the invention also discloses the touch location detection system of a kind of touch display unit, this display
Device is used for showing still image, including pel array and many scan lines being connected with described pel array
With many data lines, described pel array includes picture element matrix unit arranged in arrays, each described picture
Prime matrix unit includes multiple pixels arranged in arrays, and this touch detecting system includes:
Multiple current probes, the corresponding phase of data wire of each current probe and a picture element matrix cell columns
Even, for the scan mode according to scan line, timesharing ground is measured and each pixel in each picture element matrix unit
The electric current on data wire being connected；
Multiple integrators, are connected with the plurality of current probe respectively, and each integrator is to being attached thereto
The electric current that obtains of current probe measurement be integrated, obtain the charging charge of each picture element matrix unit
Total amount Q；
Memory element, total for prestoring the charging charge that each picture element matrix unit do not occurs touch operation
Amount Q ' and threshold value P preset；
Comparison judgment unit, the charging charge of each picture element matrix unit for timesharing measurement being obtained is total
Amount Q and this picture element matrix unit prestored do not occur the charging charge total amount Q ' touched to contrast,
Obtain the numerical value of | (Q/Q ')-1 | and the magnitude relationship of threshold value P preset；
Control unit, for when | (Q/Q ')-1 | is more than threshold value P preset, determining the picture element matrix of correspondence
Unit position there occurs touch action, and according to the scanning moment electricity corresponding with this picture element matrix unit
Flux detector or integrator and the corresponding relation of data wire, obtain this picture element matrix unit position, and
Control this display device and this touch action is made corresponding response.
Preferably, described memory element includes multiple storage matrix, and the abscissa of described storage matrix is corresponding
The position of the data wire being connected with picture element matrix unit in described display device, the corresponding described display of vertical coordinate
The position of the scan line being connected with picture element matrix unit in device, a certain data position in storage matrix
The picture element matrix unit corresponding with these data position one_to_one corresponding on the display apparatus.
The embodiment of the invention also discloses a kind of touch display dress including above-described touch detecting system
Putting, this display device is used for showing still image.
Preferably, the area of single picture element matrix unit is essentially identical with the resolution of touch operation, described
When for there is touch operation in the resolution of touch operation, connecing of the display screen of pointer and described display device
Contacting surface is amassed；The change of the to-noise ratio that the change of the charging charge total amount of single picture element matrix unit causes is more than
The change of the to-noise ratio that noise causes.
Preferably, each picture element matrix unit includes into multiple pixels of M × N matrix arrangement, and M, N are equal
For positive integer.
Preferably, M=N.
Preferably, each picture element matrix unit includes 50 × 50 pixels.
Preferably, described display device is liquid crystal indicator or organic light-emitting display device or Electronic Paper.
Preferably, described liquid crystal indicator is IPS type liquid crystal indicator or FFS type liquid crystal display dress
Put.
Compared with prior art, technique scheme has the advantage that
Touch display unit that the embodiment of the present invention provides and touch position detecting method and system, due to
When there is touch operation, in the picture element matrix unit at touch location, the electric capacity of each pixel will become
Change, thus cause the charging charge total amount of this picture element matrix unit to change, logical in the embodiment of the present invention
Cross the size of the variable quantity of the charging charge total amount of detection picture element matrix unit, such that it is able to judge correspondence
Whether picture element matrix unit position there occurs touch operation.
During owing to touch operation occurring, the variable quantity of a pixel charging charge total amount is the least, it is easy to quilt
Noise signal is flooded, and in the embodiment of the present invention, multiple pixels arranged in array is divided into a pixel
Matrix unit, improves to-noise ratio, makes the variable quantity of charging charge total amount caused because of touch operation enough
Greatly, it is possible to be different from noise jamming, thus the detection for touch operation provides detection basis.
In touch display unit in the embodiment of the present invention, it is not required to be fabricated separately touch pad pattern, also
Do not change the overall structure of conventional display panels, simply in peripheral circuit, add multiple current probe
Function element simple with integrator etc., i.e. compared with existing touch display unit, it is not necessary to individually make
Make touch pad pattern, saved cost, reduce process complexity.
Touch detection process in touch display unit in the embodiment of the present invention is also to enter with driving process simultaneously
Row, the signal being i.e. used for detecting touch operation is identical with the charging signals of electric capacity, does not increase new spy
Survey signal, thus decrease and drive interfering of signal and detectable signal, improve to-noise ratio, thus
Improve the accuracy of touch-control detection, i.e. compared with integrated form touch display panel, the most additionally increase face
In the case of the complex circuit designs degree of plate viewing area, decrease interfering between signal, improve
The accuracy of touch-control detection, reduces the cost of manufacture of touch display floater；
It addition, the display floater of non-integration touch controllable function more of the prior art is compared, reduce touch
The thickness of display floater, improves yield, reduces the cost of manufacture of touch display floater.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, in embodiment being described below
The required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, are not paying creative work
Under premise, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of the touch position detecting method of the touch display unit that the embodiment of the present invention provides；
Fig. 2 is the charging charge amount that the pointer contact contact panel that the embodiment of the present invention provides causes pixel
Become big schematic diagram；
Fig. 3 is that each picture element matrix unit prestored that the embodiment of the present invention provides does not occurs to touch behaviour
The flow chart of the preparation method of the charging charge total amount Q ' made；
Fig. 4 is that each picture element matrix unit prestored that another embodiment of the present invention provides touches
Touch the flow chart of the preparation method of the charging charge total amount Q ' of operation；
Fig. 5 is the structure chart of the touch location detection system of the touch display unit that the embodiment of the present invention provides.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
Elaborate a lot of detail in the following description so that fully understanding the present invention, but this
Bright other can also be used to be different from alternate manner described here implement, those skilled in the art are permissible
In the case of intension of the present invention, doing similar popularization, therefore the present invention not by following public specifically
The restriction of embodiment.
Secondly, the present invention combines schematic diagram and is described in detail, when describing the embodiment of the present invention in detail, for just
In explanation, represent that the profile of device architecture can be disobeyed general ratio and be made partial enlargement, and described signal
Figure simply example, it should not limit the scope of protection of the invention at this.Additionally, should wrap in actual fabrication
Three-dimensional space containing length, width and the degree of depth.
As described in background, the touch display floater thickness of non-integration touch controllable function in prior art
Excessive, production cost is high, and yield is relatively low, and integrated touch controllable function of the prior art is touch aobvious
Show that on the one hand panel adds the complexity of circuit design, on the other hand due to the display drive signals of panel
Touch-control detectable signal can produce interference, the accuracy of touch-control detection is poor.And in prior art no matter
It it is external hanging type touch display unit or integrated touch display device all must be fabricated separately touch pad figure
Case, adds the complexity of cost and technique.
Based on this, embodiments provide the touch position detecting method of a kind of touch display unit,
This display device, for showing the image of static state, including pel array and is connected many with described pel array
Root scan line and many data lines, it is characterised in that described pel array includes multiple picture element matrix unit,
Each described picture element matrix unit includes the multiple pixels in matrix arrangement, and the method includes:
According to the scan mode of scan line, timesharing ground is measured and is connected with each pixel in each picture element matrix unit
Data wire on electric current and be integrated, obtain charging charge total amount Q of each picture element matrix unit；
Charging charge total amount Q of each picture element matrix unit that timesharing measurement is obtained and being somebody's turn to do of prestoring
Picture element matrix unit does not occurs the charging charge total amount Q ' of touch operation to contrast, if | (Q/Q ')-1 | is more than
Threshold value P preset, then judge that the picture element matrix unit position of correspondence there occurs touch action.
The theoretical basis of above scheme is, when there is touch operation, and the picture element matrix unit of touch location
In the electric capacity of each pixel will change, thus cause the charging charge total amount of this picture element matrix unit
Change, by the variable quantity of the charging charge total amount of detection picture element matrix unit in the embodiment of the present invention
Size, such that it is able to judge correspondence picture element matrix unit position whether there occurs touch operation.
It is above the core concept of the application, in order to the technical scheme making the embodiment of the present invention provide is more clear
Chu, technique scheme of the present invention is described in detail by below embodiment:
Embodiments provide the touch position detecting method of a kind of touch display unit, the method
Flow chart is as it is shown in figure 1, this touch display unit is for showing the image of static state, described in the present embodiment
Static image be usually static image (each such as system pre-set in this touch display unit
Plant operation interface, dummy keyboard etc.), it is generally stored in the memory unit of this touch display unit.Here
Static state refer to user watch these images time, the content of image itself does not changes, not
Represent that the charging and discharging state of each pixel of viewing area does not changes when showing these images.True
On, during this touch display unit display still image, scan line is still and carries out one according to normal working practices
The scanning motion of frame frame, data wire also corresponding each repeat the charging process to pixel capacitance.
This touch display unit includes that display floater is (such as display panels, organic light-emitting diode display
Panel, quantum dot light emitting display floater, Electronic Paper etc.)；This display floater includes array base palte, this array
The surface of substrate includes a viewing area (ACTIVE AREA) and a non-display area (UN-ACTIVE
AREA), described non-display area surrounds described viewing area, is provided with pixel battle array in described viewing area
The many scan lines arranged and be connected with described pel array and many data lines, described pel array includes many
Individual picture element matrix unit (generally in matrix arrangement), each described picture element matrix unit includes in matrix form
Multiple pixels of arrangement, each pixel includes at least one thin film transistor (TFT) TFT (THIN FILM
TRANSISTOR) and one pixel electrode (PIXEL ELECTRODE), the pixel electrode of each pixel
Coupled with respective scan line and data wire by the thin film transistor (TFT) of this pixel, i.e. this pixel electrode is thin with this
The drain/source electrical connection of film transistor, the grid of this thin film transistor (TFT) electrically connects with respective scan line, should
The source/drain of thin film transistor (TFT) electrically connects with corresponding data line.The pel array of the present invention and many scannings
The annexation of line and many data lines can have various ways, such as with the thin film transistor (TFT) of one-row pixels
Grid be connected by scan line, with the source/drain of thin film transistor (TFT) of string pixel by data
Line is connected；The most such as pass through one with the grid of the thin film transistor (TFT) of the pixel being positioned at odd column in one-row pixels
Scan line is connected, and passes through another with the grid of the thin film transistor (TFT) of the pixel being positioned at even column in one-row pixels
Scan line is connected, and the source/drain of the thin film transistor (TFT) of the most adjacent two row pixels is by a data wire shared
It is connected.Be provided with the data driving chip being connected with data wire in non-display area, and with scan line phase
Scanning drive chip even.This scanning drive chip is for providing scanning drive signal to scan line, with control
The switch of made membrane transistor；This data driving chip is used for providing data drive signal to data wire, when
When the thin film transistor (TFT) that a certain pixel connects is opened, the electric capacity for this pixel charges.
The method comprises the following steps:
Step S11: according to the scan mode of scan line, timesharing ground is measured each with each picture element matrix unit
The electric current on data wire that pixel is connected；
It will be understood by those skilled in the art that the scan mode of scan line for scan line by line, i.e. first
Moment, scanning drive chip applying high level to the first scan line, other scan line is low level,
Now, the thin film transistor (TFT) being connected with the first scan line is opened, data driving chip by with these thin film
The data wire that the source/drain of transistor is connected starts as the electric capacity with the pixel of the first corresponding connection of scan line
It is charged, until after the electric capacity charging complete of the pixel of the first corresponding connection of scan line, time i.e. to second
Carving, scanning drive chip apply high level to the second scan line, other scan line is low level, with
The thin film transistor (TFT) that second scan line is connected is opened, and data wire starts as connection corresponding with the second scan line
The electric capacity charging of pixel, by that analogy.
The electric current measured on each data wire of timesharing described here, refers to the scanning sequence according to scan line,
Measure the data being connected within the charging interval of this pixel capacitance with each pixel in each picture element matrix unit
Electric current on line.Such as scanning drive chip applies high level to current scan line, the width of this high level
For T, the pixel of i.e. corresponding with current scan line connection is all opened, and data driving chip passes through data wire pair
The electric capacity of these pixels being currently turned on is charged that (now data driving chip can be simultaneously to currently quilt
The electric capacity of the pixel opened is charged), its charging interval is T, then measure in time T with current
Electric current I (t) on each data wire that the pixel being opened is connected；Then according to same method, to next root
Scan line applies high level, measures on each data wire being connected with the corresponding pixel being opened in time T
Electric current I (t)；Progressively scan successively, finally give in whole pel array with in each picture element matrix unit
Current value I (t) in time T on the data wire that each pixel is connected.
It should be noted that the pixel being connected with same data lines in pel array has a, (a is for the most whole
Number), after the whole pel array end of scan, the electric current on this data wire has carried out a time and has measured, and surveys every time
The time of amount electric current is T.
It should be noted that owing to charging current and the charging charge amount of a pixel are the least, it is because of touch-control
The variable quantity of the charging charge that the impact of action produces also is easy to be flooded by noise signal, therefore, in order to
Improve to-noise ratio, multiple pixels arranged in array are divided into a pixel square by the embodiment of the present invention
Array element, makes the variable quantity of charging charge total amount caused because of touch operation sufficiently large, it is possible to be different from and make an uproar
Sound interference, thus the detection for touch operation provides detection basis.
Step S12: the data wire being connected with each pixel in each picture element matrix unit that timesharing measurement is obtained
On electric current be integrated, obtain charging charge total amount Q of each picture element matrix unit；
Understand in conjunction with the scan mode of upper tracer, in this step timesharing measurement is obtained with each
The electric current on data wire that in picture element matrix unit, each pixel is connected is integrated, and refers to according to scan line
Scanning sequence, within the charging interval of the electric capacity of each pixel, is integrated the electric current measured, single
Pixel (Pij) electric capacity charging quantity of electric charge QijExpress with formula and be:
Wherein, Iij(t)
For in this pixel PijWith this pixel P in the time T openedijThe electric current on data wire being connected, pel array
Including I row pixel and J row pixel, 1≤i≤I, 1≤j≤J, i, j, I, J are integer.
Step S13: charging charge total amount Q of each picture element matrix unit timesharing measurement obtained is with pre-
This picture element matrix unit first stored does not occurs the charging charge total amount Q ' of touch operation to contrast, and obtains
The numerical value of | (Q/Q ')-1 |；
It will be understood by those skilled in the art that owing in this display device, the image of display is pre-set
Image, say, that the view data of described still image is (such as scan mode, the filling of each pixel
Electricity electric current) etc. be all knowable, therefore, it can previously according to data known to these, integration obtains respectively
There is not the integration of the charging charge total amount Q ' of touch operation, its integral way and Q in individual picture element matrix unit
Mode is identical.
Step S14: judge whether the numerical value of | (Q/Q ')-1 | is more than threshold value P preset, if it is, enter
Step S15, otherwise enters step S16；
It should be noted that the ultimate principle of the embodiment of the present invention is to utilize pointer touch-control display panel,
The electric capacity causing pixel changes, and causes the charging charge amount of electric capacity to change further, by inspection
Survey the change of the charging charge amount of each pixel, i.e. can determine whether there occurs touch-control, and combine scan line
Scan mode, i.e. can determine that occur touch-control position.
Concrete, the charging charge quantitative change that pointer contact contact panel may result in pixel is big, i.e. Q ＞ Q ',
Also the charging charge amount that can make pixel diminishes, i.e. Q ＜ Q ', and the former principle is as in figure 2 it is shown, due to pointer
Touch, be equivalent to the base in existing electric capacity (mainly including storing electric capacity 11 and liquid crystal capacitance 12)
On plinth, one in parallel touches electric capacity 13 (Touch capacitor), is equivalent to increase the capacitance of electric capacity,
Electric capacity becomes big, and data wire is after for pixel charging complete, and the charging charge amount of this pixel just becomes big naturally
?；The principle of the latter may be interpreted as, and pointer is typically operated by people, when being finger such as pointer, sends out
During raw touch, being equivalent to add an earth lead, the electric charge in pixel charging process can pass through people
Body leads ground end, thus have lost part charging charge, and then causes the charging charge amount of pixel to diminish.
Two kinds of possible independent roles of reason, it is also possible to be simultaneously applied in charging charge amount, to this in the present embodiment
It is not construed as limiting.
In conjunction with above-mentioned reason, the present embodiment judges the size of | (Q/Q ')-1 |, it addition, the present embodiment is only
Illustrate as a example by the ratio of Q ' by Q, in theory, it is also possible to the numerical value of the two is subtracted each other, by sentencing
Whether the variable quantity of disconnected charging charge total amount is more than certain value.
It addition, the size of threshold value P in the present embodiment can according to the practical situation of display device and
Depending on the intensity of noise signal, the present embodiment preset threshold value P span be preferably between
Between 5%～25%, including 5% and 25%, more preferably between 10%～25%, such as 10%, 15%,
20% etc., repeat no more here.
Step S15: judge that corresponding picture element matrix unit position there occurs touch action；
Step S16: judge that corresponding picture element matrix unit position does not occurs touch action.
During owing to touch operation occurring, in the picture element matrix unit of touch location, the capacitance of each pixel is just
Can change, thus cause the charging charge total amount of this picture element matrix unit to change, the present invention is real
Execute by detecting the size of the variable quantity of the charging charge total amount of picture element matrix unit in example, such that it is able to sentence
Whether disconnected corresponding picture element matrix unit position there occurs touch operation.
Wherein it is determined that the mode of the position of generation touch operation is, by the scanning moment of scan line, can
To determine the vertical coordinate of the picture element matrix unit that touch operation occurs, i.e. this picture element matrix unit is at data wire
Position on direction；By the position of each data wire in this picture element matrix unit, determine this picture element matrix list
The abscissa of unit, i.e. this picture element matrix unit position on scan-line direction, so that it is determined that this pixel square
The particular location of array element.
It will be understood by those skilled in the art that touch display unit described in the present embodiment can be liquid crystal
Showing device or organic light-emitting display device or Electronic Paper etc., for liquid crystal indicator, the present invention is real
Executing and be preferably IPS type liquid crystal indicator or FFS type liquid crystal indicator in example, its reason is both
On the array base palte (also referred to as infrabasal plate) that the circuit of the liquid crystal indicator of type of drive and electrode are respectively provided with,
There is no the touch of the ITO layer shielding pointer of color membrane substrates (i.e. upper substrate), be therefore more conducive to touch
The detection of action.
The touch position detecting method of the touch display unit that another embodiment of the present invention provides, its flow chart
As it is shown on figure 3, unlike a upper embodiment, the present embodiment defines described in prestore every
There is not the acquisition pattern of the charging charge total amount Q ' of touch operation in one picture element matrix unit, concrete, should
Process comprises the following steps:
Step S21: the view data input of the still image that will show is to described touch display unit；
Step S22: in the case of not there is touch operation, according to the scan mode of scan line, timesharing
The electric current on the data wire being connected with each pixel in each picture element matrix unit is measured on ground；
Step S23: the data wire being connected with each pixel in each picture element matrix unit is measured in described timesharing
On electric current be integrated, obtain the charging charge total amount of each picture element matrix unit；
Step S24: the charging charge total amount of each picture element matrix unit obtained by integration is as corresponding picture
There is not the charging charge total amount Q ' of touch operation in prime matrix unit.
In the present embodiment, the principle of each step is similar with a upper embodiment with implementation, simply this mistake
Journey was just carried out before described tableaux shows in advance.
It addition, there is not the charging charge total amount Q ' of touch operation afterwards obtaining each picture element matrix unit,
Also include: all picture element matrix unit do not occur that the charging charge total amount Q ' of touch operation be stored in one and deposits
In storage matrix, the charging charge of the corresponding picture element matrix unit of data in described storage matrix is total
Amount.
Wherein, the corresponding described display device of the abscissa of described storage matrix is connected with picture element matrix unit
The position of data wire, the scan line being connected with picture element matrix unit in the corresponding described display device of vertical coordinate
Position, in conjunction with scan line scan mode understand, the position of scan line can be according to this row picture element matrix
The scanning moment of unit determines.
The pixel square that a certain data in described storage matrix position in storage matrix is corresponding with these data
Array element position in whole pel array can be identical, it is also possible to different；The present embodiment is preferably
The former, the most a certain data position in the storage matrix picture element matrix unit corresponding with these data is in display
Position one_to_one corresponding on device.
In addition, it is necessary to explanation, when dividing picture element matrix unit, Main Basis is for touching
The resolution of operation, and the charging charge total amount to a picture element matrix unit that causes of touch operation
The situation of change of the to-noise ratio that change causes.Concrete, the area of single picture element matrix unit is grasped with touching
Make resolution essentially identical, the resolution of described touch operation for occur touch operation time, pointer with
The contact area of the display screen of described display device；The change of the charging charge total amount of single picture element matrix unit
The change changing the to-noise ratio caused is more than the change of the to-noise ratio that noise causes.
Preferably, in the present embodiment, each picture element matrix unit includes in M × multiple pictures of N matrix arrangement
Element, M, N are positive integer；It is furthermore preferred that the M=N in the present embodiment, the most each pixel cell is
Square area；If described pointer is finger, a picture element matrix unit in the present embodiment can wrap
Include 50 × 50 pixel regions, in such cases, picture element matrix unit about length of side be 5mm just
Square region.
Another embodiment of the present invention discloses the touch position detecting method of a kind of touch display unit, with upper
Unlike one embodiment, each picture element matrix unit prestored described in the present embodiment does not occurs
The acquisition pattern of the charging charge total amount Q ' of touch operation is different, the flow chart of this process as shown in Figure 4,
Specifically include following steps:
Step S31: the view data input of the still image that will show is to described touch display unit；
Step S32: in the case of not there is touch operation, according to the scan mode of scan line, timesharing
The electric current on the data wire being connected with each pixel in each picture element matrix unit is measured on ground；
Step S33: timesharing is measured on the data wire being connected with each pixel in each picture element matrix unit
Electric current is integrated, and obtains the charging charge total amount of each picture element matrix unit；
Step S34: repeating step S31-step S33, repetitive measurement integration obtain each picture element matrix list
Multiple measured values of the charging charge total amount of unit；
Step S35: be calculated the multiple measured value of charging charge total amount average of each picture element matrix unit
Value；
Step S36: this meansigma methods is not occurred as corresponding picture element matrix unit the charged electrical of touch operation
Lotus total amount Q ', and the numerical value of Q ' is stored in a storage matrix, in this storage matrix and a upper embodiment
Storage matrix identical.
Through the charging charge total amount of repetitive measurement each picture element matrix unit in the present embodiment, obtain flat afterwards
, there is not the charging charge total amount Q ' of touch operation as corresponding picture element matrix unit, improve in average
The accuracy of Q '.
A kind of touch display unit is disclosed relative to, another embodiment of the present invention with said method embodiment
Touch location detection system, this display device is used for showing still image, including pel array and with institute
Stating many scan lines and many data lines that pel array is connected, described pel array includes arranged in arrays
Picture element matrix unit, each described picture element matrix unit includes multiple pixels arranged in arrays, this touch
Touch the structure chart of detecting system as it is shown in figure 5, include following functions module:
Multiple current probes, i.e. current probe 1-current probe n, each current probe and a picture
The data wire correspondence of prime matrix cell columns is connected, and for the scan mode according to scan line, timesharing ground is measured
The electric current on data wire being connected with each pixel in each picture element matrix unit；
Multiple integrators, i.e. integrator 1-integrator n, each integrator is connected with each current probe respectively,
The electric current that the current probe measurement being attached thereto is obtained by each integrator is integrated, and obtains each picture
Charging charge total amount Q of prime matrix unit；
Memory element, total for prestoring the charging charge that each picture element matrix unit do not occurs touch operation
Amount Q ' and threshold value P preset；
Comparison judgment unit, the charging charge of each picture element matrix unit for timesharing measurement being obtained is total
Amount Q and this picture element matrix unit prestored do not occur the charging charge total amount Q ' touched to contrast,
Obtain the numerical value of | (Q/Q ')-1 | and the magnitude relationship of threshold value P preset；
Control unit, for when | (Q/Q ')-1 | is more than threshold value P preset, determining the picture element matrix of correspondence
Unit position there occurs touch action, and according to the scanning moment electricity corresponding with this picture element matrix unit
Flux detector or integrator and the corresponding relation of data wire, obtain this picture element matrix unit position, and
This touch action is made corresponding response by the viewing area controlling this display device.
In actual fabrication, this control unit can be connected with the scanning drive chip of this display device, or
It is disposed on driving on control chip, to obtain the scanning moment of picture element matrix unit, afterwards by comparing
Judging unit or current probe and integrator, obtain the position of the data wire that this picture element matrix unit includes
Put, so that it is determined that this picture element matrix unit is in the position of viewing area.
Described memory element in the present embodiment includes multiple storage matrix, the abscissa of described storage matrix
The position of the data wire being connected with picture element matrix unit in corresponding described display device, described in vertical coordinate correspondence
The position of the scan line being connected with picture element matrix unit in display device, a certain data are in storage matrix
The position picture element matrix unit corresponding with these data position one_to_one corresponding on the display apparatus.
Memory element, comparison judgment unit in the present embodiment are the same with control unit, the most all can arrange
On the driving control chip of this display device, i.e. detecting system in the present embodiment can be arranged on completely
The non-display area of this display device, and the circuit structure of viewing area is not had any impact.
Accordingly, another embodiment of the present invention also discloses a kind of touch including above-mentioned touch detecting system
Display device, this display device is used for showing still image.This display device includes array base palte, this battle array
The surface of row substrate has a viewing area and a non-display area, and described non-display area surrounds described aobvious
Show region, described viewing area has multiple pel array and many be connected with described pel array sweep
Retouching line and many data lines, described pel array includes multiple picture element matrix unit, each described pixel square
Array element includes the multiple pixels in matrix arrangement, and each pixel includes at least one thin film transistor (TFT),
It is connected by scan line with the grid of a line thin film transistor (TFT), passes through with the source electrode of string thin film transistor (TFT)
One data wire is connected, and has the data driving chip being connected with described data wire in described non-display area,
And the scanning drive chip being connected with described scan line, it is brilliant that described scanning drive chip is used for controlling thin film
The switch of body pipe, described data driving chip is used for when the thin film transistor (TFT) of a certain pixel region is opened,
Electric capacity for this pixel region charges.
Further, the area of single picture element matrix unit is essentially identical with the resolution of touch operation, described tactile
When touching the resolution of operation for there is touch operation, contacting of the display screen of pointer and described display device
Area；The change of the to-noise ratio that the change of the charging charge total amount of single picture element matrix unit causes is more than making an uproar
The change of the to-noise ratio that sound causes.
Preferably, in the present embodiment, each picture element matrix unit includes in M × multiple pictures of N matrix arrangement
Element, M, N are positive integer, it is furthermore preferred that the M=N in the present embodiment, the most each pixel cell is
Square area, if described pointer is finger, a picture element matrix unit in the present embodiment can wrap
Include 50 × 50 pixel regions, in such cases, picture element matrix unit about length of side be 5mm just
Square region.
Touch display unit described in the present embodiment can be liquid crystal indicator or organic light-emitting display device
Or Electronic Paper etc., for liquid crystal indicator, the embodiment of the present invention is preferably IPS type liquid crystal
Showing device or FFS type liquid crystal indicator.
In touch display unit in the embodiment of the present invention, do not change the overall structure of conventional display panels,
In peripheral circuit, simply add the simple function element such as multiple current probe and integrator, more existing
The integrated touch control display device having, decreases the complexity of circuit structure, and the embodiment of the present invention
Touch detection process also to carry out with driving process simultaneously, be i.e. used for signal and the electricity of detecting touch operation
The charging signals held is identical, does not increase new detectable signal, thus decreases driving signal and detection letter
Number interfere, improve to-noise ratio, thus improve the accuracy of touch-control detection, and, more existing
The display floater having the non-integration touch controllable function in technology is compared, and reduces the thickness of touch display floater,
Improve yield, reduce the cost of manufacture of touch display floater.
In this specification, various piece uses the mode gone forward one by one to describe, the explanation of each some importance be with
The difference of other parts, between various piece, identical similar portion sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses
The present invention.Multiple amendment to these embodiments will be aobvious and easy for those skilled in the art
See, generic principles defined herein can without departing from the spirit or scope of the present invention,
Realize in other embodiments.Therefore, the present invention is not intended to be limited to embodiment illustrated herein, and
It is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (20)
1. a touch position detecting method for touch display unit, this display device is used for showing static map
Picture, the many scan lines including pel array and being connected with described pel array and many data lines, it is special
Levying and be, described pel array includes that multiple picture element matrix unit, each described picture element matrix unit include
Multiple pixels in matrix arrangement, the method includes:
According to the scan mode of scan line, timesharing ground is measured and is connected with each pixel in each picture element matrix unit
Data wire on electric current and be integrated, obtain charging charge total amount Q of each picture element matrix unit；
Charging charge total amount Q of each picture element matrix unit that timesharing measurement is obtained and being somebody's turn to do of prestoring
Picture element matrix unit does not occurs charging charge total amount Q' of touch operation to contrast, if | (Q/Q')-1 | is more than
Threshold value P preset, then judge that the picture element matrix unit position of correspondence there occurs touch action.
Method the most according to claim 1, it is characterised in that described touch display unit is liquid crystal
Display device or organic light-emitting display device or Electronic Paper.
Method the most according to claim 2, it is characterised in that described liquid crystal indicator is IPS
Type liquid crystal indicator or FFS type liquid crystal indicator.
Method the most according to claim 1, it is characterised in that described in each pixel of prestoring
Matrix unit does not occurs the acquisition pattern of charging charge total amount Q' of touch operation to be:
The view data input of the still image that will show is to described touch display unit；
In the case of not there is touch operation, according to the scan mode of scan line, timesharing ground measure with
In each picture element matrix unit each pixel be connected data wire on electric current and be integrated, obtain each picture
The charging charge total amount of prime matrix unit, the charging charge of each picture element matrix unit obtained by integration is total
Measure charging charge total amount Q' that touch operation does not occurs as corresponding picture element matrix unit.
Method the most according to claim 1, it is characterised in that described in each pixel of prestoring
Matrix unit does not occurs the acquisition pattern of charging charge total amount Q' of touch operation to be:
The view data input of the still image that will show is to described touch display unit；
In the case of not there is touch operation, according to the scan mode of scan line, timesharing ground measure with
In each picture element matrix unit each pixel be connected data wire on electric current and be integrated, obtain each picture
The charging charge total amount of prime matrix unit；
According to the step of the described charging charge total amount obtaining each picture element matrix unit, repetitive measurement also amasss
Get multiple measured values of the charging charge total amount of each picture element matrix unit；
It is calculated the meansigma methods of the multiple measured value of charging charge total amount of each picture element matrix unit, should
Charging charge total amount Q' of touch operation is there is not in meansigma methods as corresponding picture element matrix unit.
6. according to the method described in claim 4 or 5, it is characterised in that described method also includes institute
Picture element matrix unit is had not occur charging charge total amount Q' of touch operation to be stored in a storage matrix, institute
State the charging charge total amount of the corresponding picture element matrix unit of data in storage matrix.
Method the most according to claim 6, it is characterised in that the abscissa pair of described storage matrix
Answering the position of the data wire being connected in described display device with picture element matrix unit, vertical coordinate is corresponding described aobvious
The position of the scan line being connected with picture element matrix unit in showing device, a certain data position in storage matrix
Put the picture element matrix unit corresponding with these data position one_to_one corresponding on the display apparatus.
Method the most according to claim 7, it is characterised in that the area of single picture element matrix unit
Essentially identical with the resolution of touch operation, when for there is touch operation in the resolution of described touch operation,
The contact area of the display screen of pointer and described display device；The charging charge of single picture element matrix unit
The change of the signal to noise ratio that the change of the signal to noise ratio that the change of total amount causes causes more than noise.
Method the most according to claim 8, it is characterised in that each picture element matrix unit include in
Multiple pixels of M × N matrix arrangement, M, N are positive integer.
Method the most according to claim 9, it is characterised in that M=N.
11. methods according to claim 1, it is characterised in that the value of default threshold value P
Scope is between 5%～25%.
The touch location detection system of 12. 1 kinds of touch display units, this display device is used for showing static state
Image, the many scan lines including pel array and being connected with described pel array and many data lines, its
Being characterised by, described pel array includes picture element matrix unit arranged in arrays, each described pixel square
Array element includes multiple pixels arranged in arrays, and this touch detecting system includes:
Multiple current probes, the corresponding phase of data wire of each current probe and a picture element matrix cell columns
Even, for the scan mode according to scan line, timesharing ground is measured and each pixel in each picture element matrix unit
The electric current on data wire being connected；
Multiple integrators, are connected with the plurality of current probe respectively, and each integrator is to being attached thereto
The electric current that obtains of current probe measurement be integrated, obtain the charging charge of each picture element matrix unit
Total amount Q；
Memory element, total for prestoring the charging charge that each picture element matrix unit do not occurs touch operation
Amount Q' and threshold value P preset；
Comparison judgment unit, the charging charge of each picture element matrix unit for timesharing measurement being obtained is total
Amount Q and this picture element matrix unit prestored do not occur charging charge total amount Q' touched to contrast,
Obtain the numerical value of | (Q/Q')-1 | and the magnitude relationship of threshold value P preset；
Control unit, for when | (Q/Q')-1 | is more than threshold value P preset, determining the picture element matrix of correspondence
Unit position there occurs touch action, and according to the scanning moment electricity corresponding with this picture element matrix unit
Flux detector or integrator and the corresponding relation of data wire, obtain this picture element matrix unit position, and
Control this display device and this touch action is made corresponding response.
The touch location detection system of 13. touch display units according to claim 12, its feature
Being, described memory element includes multiple storage matrix, and the abscissa of described storage matrix is corresponding described aobvious
The position of the data wire being connected with picture element matrix unit in showing device, in the corresponding described display device of vertical coordinate
With the position of the scan line that picture element matrix unit is connected, a certain data position in storage matrix and this number
According to corresponding picture element matrix unit position one_to_one corresponding on the display apparatus.
14. according to the touch location detection system of the touch display unit described in claim 12 or 13,
Described touch display unit is used for showing still image.
The touch location detection system of 15. touch display units according to claim 14, its feature
Being, the area of single picture element matrix unit is essentially identical with the resolution of touch operation, and described touch is grasped
When for there is touch operation in the resolution made, the contact area of the display screen of pointer and described display device；
The change of the signal to noise ratio that the change of the charging charge total amount of single picture element matrix unit causes causes more than noise
The change of signal to noise ratio.
The touch location detection system of 16. touch display units according to claim 15, its feature
Being, each picture element matrix unit includes into multiple pixels of M × N matrix arrangement, and M, N are the most whole
Number.
The touch location detection system of 17. touch display units according to claim 16, its feature
It is, M=N.
The touch location detection system of 18. touch display units according to claim 17, its feature
Being, each picture element matrix unit includes 50 × 50 pixels.
The touch location detection system of 19. touch display units according to claim 15, its feature
Being, described display device is liquid crystal indicator or organic light-emitting display device or Electronic Paper.
The touch location detection system of 20. touch display units according to claim 19, its feature
Being, described liquid crystal indicator is IPS type liquid crystal indicator or FFS type liquid crystal indicator.
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| CN106775131B (en) * | 2017-02-20 | 2020-01-21 | 京东方科技集团股份有限公司 | Touch display substrate and touch display method |
| CN108717166B (en) * | 2017-11-23 | 2020-07-03 | 北京航空航天大学 | Lithium battery capacity estimation method and device based on visual cognition |
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| CN101975998A (en) * | 2010-09-28 | 2011-02-16 | 彩虹集团公司 | Liquid crystal display (LCD) display screen with touch detection function and implement method thereof |
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| JP5224242B2 (en) * | 2008-04-09 | 2013-07-03 | Ｎｌｔテクノロジー株式会社 | Display device, liquid crystal display device, electronic apparatus, and manufacturing method for display device |
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| CN101975998A (en) * | 2010-09-28 | 2011-02-16 | 彩虹集团公司 | Liquid crystal display (LCD) display screen with touch detection function and implement method thereof |
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