CN106325633B - In-cell touch display panel and its driving method - Google Patents
In-cell touch display panel and its driving method Download PDFInfo
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- CN106325633B CN106325633B CN201510988165.9A CN201510988165A CN106325633B CN 106325633 B CN106325633 B CN 106325633B CN 201510988165 A CN201510988165 A CN 201510988165A CN 106325633 B CN106325633 B CN 106325633B
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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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
Abstract
In-cell touch display panel and its driving method.During the In-cell touch display panel is alternately driven in a display and during a touch-control, it include: a plurality of grid line, each grid line is driven by a clock signal and sends out scan signal when during the display, stops sending out the scanning signal during the touch-control；And N dummy gate line, before being switched to during the display during the touch-control, each dummy gate line is driven by a virtual clock signal and sends out a virtual scan signal, wherein the time point on the rising edge edge of N number of virtual clock signal of the N dummy gate line is driven to be synchronized with the time point for driving the trailing edge edge of N number of clock signal of N grid line in a plurality of grid line respectively.
Description
Technical field
The present invention relates to a kind of In-cell touch display panel and its driving methods, and in particular to improvement picture color
The In-cell touch display panel of spot (mura) and its driving method during touch-control.
Background technique
Embedded touch control display panel (Touch In Display, TID) is provided simultaneously with display function and touch function
It is new-type to integrate escope.This new-type panel is and the liquid crystal display panel factory of arranging in pairs or groups by by the integration of panel IC and touch-control IC
New-type production process, one of new-type liquid crystal display panel developed.
There is a kind of embedded touch control display panel, common electrode (or grounding electrode) is divided into the multiple of rectangular configuration
Electrode block, each electrode block are still used as general common electrode during display, and then as touch-control during touch-control
Sensing electrode uses, and capacitor is formed by by between detecting electrode block and the touch control object of outside, to judge the position of touch control object.
Fig. 1 is the schematic top view for showing a kind of known embedded touch control display panel.As shown in Figure 1, embedded touch control is aobvious
Show on panel 10, the practical region for being used to show is known as display area 11.In display area 11, common electrode is divided into matrix
Shape configuration multiple common electrode block S1, S2 ..., Sk, Sk+1 ..., Sm, each common electrode block S1, S2 ..., Sk, Sk+
1 ..., Sm respectively can by a plain conductor W1, W2 ..., Wk, Wk+1 ..., Wm be connected to driving chip.Driving chip exists
Common potential is exported during display to whole common electrode blocks, and touching signals are then exported during touch-control to each common electrode
Block has detected whether touch-control.
For this embedded touch control display panel, general display and touch-control driving method are subregion driving, in simple terms
The display area of panel is exactly divided into several regions in line direction, each region is sequentially driven, when a region is driven
It can be introduced into display driving when dynamic and enter back into touch-control driving.Touch-control driving period, the amorphous silicon gate driving circuit on panel
(Gate On Panel (later abbreviation GOP circuit)), which can suspend, exports scanning signal to grid signal.In this way, each area
During can all there be scan signal pause in domain, and this interval might have for the GOP circuit of cascade arrangement
The problem of signal can not hand on.Later may during entering display before during entering touch-control during display or during touch-control
The boundary for having region generates the situation of color spot.In addition, it is also possible to because being compressed during display, so that being filled in GOP circuit
Electric situation that is insufficient, and causing driving force to decline.
The present invention provides a kind of In-cell touch display panel and its driving method in view of being above-mentioned problem,
It can not continue transmitting to improve above-mentioned signal, zone boundary leads to the problem of color spot, the decline of GOP circuit drives power.
Summary of the invention
The present invention proposes that a kind of embedded touch shows (Touch In Display) panel, and it is aobvious to be alternately driven in one
During showing and during a touch-control, comprising: multiple pixels configure in the In-cell touch display panel；A plurality of grid line, point
It is not connected to the pixel of each column, each grid line is driven and sent out and sweep by a clock signal when during the display
Signal is retouched, stops sending out the scanning signal during the touch-control；And N dummy gate line, it is not attached to any pixel, at this
Before being switched to during the touch-control during display, each dummy gate line is driven by a virtual clock signal and sends out a void
Quasi- scanning signal, wherein N is more than or equal to 1, wherein driving the rising edge of N number of virtual clock signal of the N dummy gate line
The time point on edge is synchronized with the trailing edge edge for the N number of clock signal for driving N grid line in a plurality of grid line respectively
Time point.
According to an embodiment of the present invention, in above-mentioned In-cell touch display panel, N number of clock signal is aobvious at this
N number of signal of the N grid line finally driven before during being switched to the touch-control during showing.
According to a further embodiment of the invention, in above-mentioned In-cell touch display panel, the N dummy gate line it is every
After one is more switched to during the display during the touch-control, is driven and sent out this and virtually sweep by one second virtual clock signal
Signal is retouched, wherein driving the time point on the trailing edge edge of N number of second virtual clock signal of the N dummy gate line same respectively
It is walked in the time point for driving the rising edge edge of other N number of clock signal of other N grid line in a plurality of grid line.Also,
According to an embodiment of the present invention, this after in addition N number of clock signal is switched to during the display during the touch-control at first
N number of signal of N grid line of driving.
The present invention also provides a kind of driving method of In-cell touch display panel, comprising: during any frame, by this
In-cell touch display panel alternately drives during a display and during a touch-control；One in during a first frame
During one group of time point drives the In-cell touch display panel to enter the touch-control；And one second frame after the first frame
During one second group of time point in period drives the In-cell touch display panel to enter the touch-control, wherein first group of time
Point is different from second group of time point.
According to an embodiment of the present invention, in the driving method of above-mentioned In-cell touch display panel, second group of time
Point is selected at random.
The present invention also provides a kind of driving method of In-cell touch display panel, wherein the In-cell touch display panel
Include: multiple pixels, configures in the In-cell touch display panel；A plurality of grid line is respectively connected to the pixel of each column；
And N dummy gate line, it is not attached to any pixel, wherein N is more than or equal to 1, the driving of the In-cell touch display panel
Method includes: alternately to drive the In-cell touch display panel during a display and during a touch-control；In the display
Period drives multiple grid line to send out scan signal by column with multiple clock signals；Enter the touching during the display
Before during control, drive the N dummy gate line to send out a virtual scan signal by column with N number of virtual clock signal, wherein N is big
In equal to 1；And it is synchronized with the time point on the rising edge edge of N number of virtual clock signal respectively and drives in a plurality of grid line
The time point on the trailing edge edge of N number of clock signal of N grid line.
According to an embodiment of the present invention, in the driving method of above-mentioned In-cell touch display panel, N number of clock letter
N number of signal of the N grid line finally driven before during number being switched to the touch-control during the display.
According to a further embodiment of the invention, the driving method of above-mentioned In-cell touch display panel further include: in the touching
After entering during display sensing during control, which is driven through with by column with N number of second virtual clock signal
Send out the virtual scan signal；And the time point on the trailing edge edge of N number of second virtual clock signal is made to be synchronized with drive respectively
Move the time point on the rising edge edge of other N number of clock signal of other N grid line in a plurality of grid line.Also, according to this
Invention one embodiment, the N which drives at first later during being switched to the display during the touch-control
N number of signal of grid line.
By above kind In-cell touch display panel and its driving method, known embedded touch can be improved and shown
Zone boundary leads to the problem of color spot in panel.
Detailed description of the invention
Fig. 1 is the schematic top view for showing a kind of known embedded touch control display panel.
Fig. 2 is to show that embedded touch control display panel carries out the schematic diagram of subregion driving.
Fig. 3 is to show that amorphous silicon integrates the circuit diagram of a shift register in gate driving circuit.
Fig. 4 is each node potential waveform diagram of shift register shown in Fig. 3.
Fig. 5 is used in each node when the subregion driving of embedded touch control display panel for shift register shown in Fig. 3
Potential waveform figure.
Fig. 6 A~6C is a part of circuit structure for showing the shift register of improvement Fig. 3 of the embodiment of the present invention.
Fig. 6 D is when showing that the shift register of the embodiment of the present invention is used in the subregion driving of embedded touch control display panel
Improvement each node potential waveform diagram.
Fig. 7 is to show that the present invention changes the schematic diagram at the time point of touch-control driving between two frames.
Fig. 8 is to show that the present invention changes the schematic diagram at the time point of touch-control driving between multiple frames.
Fig. 9 is the shape for showing the clock signal output timing of embedded touch control display panel and generating coupling to common electrode
The schematic diagram of condition.
Figure 10 is the schematic diagram of embedded touch control display panel according to an embodiment of the invention.
Figure 11 be show embedded touch control display panel according to an embodiment of the invention clock signal output timing and
The schematic diagram of the situation of coupling is generated to common electrode.
Figure 12 is driving scanning mode according to an embodiment of the invention.
[symbol description]
10,20,30~embedded touch control display panel；
11,21,31~display area；
D1, D2, D3, D4~data line；
G1, G2, G3, G13~G46~grid line；
DG1, DG2, DG3, DG4~dummy gate line；
P11, P12, P13, P21, P22, P23~pixel；
R1, R2, Rn-1, Rn~region；
A, B~scanning direction；
CK~clock signal input terminal；
CK1~CK12~clock signal；
C1~capacitor；
OUT_M-1~upper level signal input part；
OUT_M~output end；
P~node；
Q~control terminal；
S1, S2 ..., Sk+1 ..., Sm~common electrode block；
SF_M~M grades of shift registers；
T1, T2, T3~transistor；
T~time；
Group time point of t1, t2, t3, t4, t5~first；
Group time point of t1a, t2a, t3a, t4a, t5a~second；
T1b, t2b, t3b, t4b, t5b~third group time point；
TID1, TID2, TID3, TID4, TID5~touch-control driving period；
VGL~lower voltage node；
Vcom~common electrode voltage；
W1, W2 ..., Wk+1 ..., Wm~plain conductor.
Specific embodiment
Illustrate touch-control display panel and its display methods of the invention below according to schema.In different schema and corresponding
Identical symbol is indicated in explanation to be indicated identical element and omits repeated explanation.
Fig. 2 is to show that embedded touch control display panel carries out the schematic diagram of subregion driving.Assuming that embedded touch control display panel
Display area be divided into the row direction multiple (such as n) region R1, R2 ..., Rn-1, Rn, embedded touch control display panel 10
Driving method as shown in Fig. 2, carry out display driving to region R1 first, scanning signal is sent out to the grid line in the R1 of region,
Touch-control driving is carried out to region R1 after the completion, judges whether the common electrode block in sensing region R1 has by touch-control；Then, under
One region R2 carries out display driving, carries out touch-control driving to region R2 again after the completion, and so on, until region Rn completes to show
Show driving and touch-control driving.T during primary display driving and touch-control driving is all completed in entire area, that is, one complete
During frame.When the display driving frequency of embedded touch control display panel 10 is 60Hz, T 16.6ms.
Fig. 3 is to show that amorphous silicon integrates the circuit diagram of a shift register in gate driving circuit.Fig. 4 is shown in Fig. 3
Shift register each node potential waveform diagram.Assuming that the essential structure of a M grades of shift register SF_M includes 3
Transistor T1, T2, T3 and 1 capacitor C1, wherein transistor T1 be connected to clock signal input terminal CK and output end Out_M it
Between, control terminal is connected to point P, defeated during the selection to the m column grid line that M grades of shift register SF_M are connected herein
Scanning signal out.Transistor T2 does diode connection, is connected between upper level signal input part Out_M-1 and node P.Crystal
Pipe T3 is connected between node P and a lower voltage node VGL, controlled by a control terminal Q when by the voltage pull-down of node P extremely
Potential level provided by lower voltage node VGL (as shown in figure 4, a usually negative voltage).Capacitor C1 be connected to node P with it is defeated
Between outlet Out_M.Under the situation of overstepping one's bounds sector scanning, the waveform of each node is as shown in figure 4, the current potential of node P can be with
Upper level signal input part Out_M-1's and clock signal input terminal CK's signal successively inputs, and steps up level, and
Output end Out_M is allowed to send out the scanning signal of a pulse.
However, when the shift register of Fig. 3 is some region in the subregion driving for embedded touch control display panel
When first grid line, each node potential waveform is as shown in Figure 5.Display is completed when the last item grid line in a upper region to drive
When dynamic, signal can input the upper level signal input part Out_M-1 of first shift register SF_M in this region, with laggard
Enter the touch-control driving in a upper region.Since touch-control driving period GOP circuit does not export scanning signal, clock signal meeting
The just input clock signal input terminal CK after the completion of driving of a upper region touch-control.So, often because of upper level signal
The voltage of the input of input terminal Out_M-1 and the interval of the clock signal input terminal CK voltage inputted are too long, so that the electricity of node P
Position declines because of electric leakage.If node P potential drop obtains too low, as clock signal input clock signal input terminal CK, just can not
Transistor T1 is fully on, and then lead to not scanning signal sending out output end Out_M.
In order to solve the problems, such as that above-mentioned grid signal can not be transmitted, the present invention provides following several solutions: (1) will be electric
The capacitance for holding C1 increases, to slow down the electric leakage of node P；(2) transistor T2, T3 are changed to concatenated mode, increase transistor
The cross-pressure of T2, T3 or impedance, so that leakage current is smaller, transistor T2 is changed to concatenated two kinds of forms for implementing such as Fig. 6 A, 6B,
Transistor T3 is changed to the concatenated form for implementing such as Fig. 6 C.Two concatenated examples of transistor are all only shown in Fig. 6 A~6C,
But concatenated transistor size is also possible to two or more；(3) passage length for increasing transistor T2, T3, can equally increase
The cross-pressure of transistor T2, T3 or impedance, so that leakage current is smaller；(4) by the upper level signal input part Out_M-1 of transistor T2
Reconfiguration high-voltage level makes node P maintain fixed level；(5) voltage of lower voltage node VGL is mentioned in touch-control driving period
Up to such as 0V, specifically, such as the waveform diagram of each node shown in Fig. 6 D, when the voltage of lower voltage node VGL is in touch-control
When driving period is increased to 0V from a negative voltage, the pressure difference between node P and lower voltage node VGL can be reduced, and slows down node P
The electric leakage voltage waveform of the dotted line as shown in node P (generate).
On the other hand, it can also be directly changed the driving method to embedded touch-control display panel, do not take subregion to drive, it is right
After entire display area carries out display driving, then carry out touch-control driving.Between frames by the arrangement of time of touch-control driving
Interregnum drives to avoid the display between region and region and interrupts.
In addition, another problem is can be found that from Fig. 6, even if scanning signal can be exported from output end Out_M, but arteries and veins
Along but becoming tiltedly, this influences whether voltage swing (the especially arteries and veins of scanning signal of writing pixel for the rising edge edge of punching and trailing edge
The trailing edge of punching is bigger along influencing), and cause the display of the pixel column abnormal.This region being namely previously mentioned in the prior art
Boundary leads to the problem of color spot.
In order to solve the problems, such as it is above-mentioned because scanning signal Wave anomaly and caused by boundary color spot, the present invention provide with
Lower two kinds of solutions: (1) increase the channel the transistor T1 breadth length ratio being located in the shift register SF_M of zone boundary, so
One can increase the driving capability of transistor T1, and the scanning that the output end Out_M for improving shift register SF_M is exported
The impulse waveform of signal；(2) constantly change the time point that embedded touch control panel enters touch-control driving, make the situation of boundary color spot
To entire display picture equalization, human eye will be unable to observe the color spot of non-specific location.
Fig. 7 is to show that the present invention changes the schematic diagram at the time point of touch-control driving between two frames.As shown in fig. 7, false
Shift register at different levels is sequentially inputted equipped with 12 clock signal CK1~CK12, sends out shift register at different levels sequentially
The grid signal of 12 grid lines shows driving period in frame n, and clock signal CK1~CK12 makes shift register respectively
The scanning signal of 13~G24 of gate lines G is sent out, enters touch-control driving period, after touch-control driving period, clock signal later
CK1~CK12 makes the scanning signal of shift register submitting 25~G36 of gate lines G respectively again.However, working as in next frame n+1
In, clock signal CK1~CK12 make shift register send out 13~G26 of gate lines G scanning signal after just enter touch-control drive
Period, after touch-control driving period, clock signal CK1~CK12 makes shift register send out 27~G36 of gate lines G respectively again
Scanning signal.As seen from Figure 7, it is in a framen during entering touch-control driving after the scanning of gate lines G 24, and it is next
It is then during just entering touch-control driving after the scanning of gate lines G 26 in frame n+1.Show what driving section was scanned by adjustment
Columns, can anterior-posterior translation touch-control driving during.
Fig. 8 is to show that the present invention changes the schematic diagram at the time point of touch-control driving between multiple frames.Assuming that in a frame
In period T, five touch-control driving periods TID1, TID2, TID3, TID4, TID5 can be entered.This five touch-control driving periods
TID1, TID2, TID3, TID4, TID5 can occur in a framen in first group of time point t1, t2, t3, t4, t5；The meeting in frame n+a
Occur with second group of time point t1a, t2a, t3a, t4a, t5a；Can occur in frame n+b with third group time point t1b,
t2b,t3b,t4b,t5b.Since the time point in each frame is staggered, the phenomenon that edge color spot, can be evenly distributed to picture
In face, human eye is made to be not easy to observe.Also, entering touch-control driving period TID1, TID2, TID3, TID4, TID5 in each frame
Time point can select at random.
Fig. 9 is the shape for showing the clock signal output timing of embedded touch control display panel and generating coupling to common electrode
The schematic diagram of condition.In display driving period, the rising edge edge and trailing edge edge of each clock signal CK1~CK12 can be to panel
The voltage Vcom of common electrode (no matter common electrode is formed in TFT side or colored filter side) causes to couple.Normal
Under state, each trailing edge edge of clock signal can be with the time-interleaving on the rising edge edge of another clock signal, therefore
The voltage coupling of common electrode can be mutually offsetted.However, when display driving is switched to the boundary of touch-control driving, such as Fig. 9 institute
Showing, the trailing edge into the pulse of last four clock signal CK9~CK12 before touch-control driving is offseted along there is no method,
And the voltage of common electrode is made to generate downward bounce.Same situation also occurs in touch-control driving and is switched to display driving
When boundary, the rising edge into the pulse of most the forth day of a lunar month clock signal CK1~CK4 after display driving is supported along there is no method
Pin, and the voltage of common electrode is made to generate upward bounce.And the voltage bounce of common electrode will cause the cross-pressure of liquid crystal
Change, equally the color spot on meeting generating region boundary.
In order to solve the problem above-mentioned, the present invention is provided with dummy gate line and sends signal to balance above-mentioned common electrode
Voltage bounce.Figure 10 is the schematic diagram of embedded touch control display panel according to an embodiment of the invention.Embedded touch face
In the display area 21 of plate 20 include a plurality of gate lines G 1 for being parallel to column direction, G2 ...；The a plurality of data for being parallel to line direction
Line D1, D2, D3, D4 ...；Positioned at multiple pixel P11, P21 of above-mentioned each grid line Yu pieces of data line confluce, P12,
P22,P13,P23,…；And at least one (the present embodiment be 4) be parallel to column direction dummy gate line DG1, DG2,
DG3,DG4.Dummy gate line DG1, DG2, DG3, DG4 can send out respectively when virtual clock signal C1, C2, C3, C4 are inputted and sweep
Signal is retouched, but dummy gate line DG1, DG2, DG3, DG4 are not connected to any pixel.In Figure 10 dummy gate line DG1,
Though DG2, DG3, DG4 configure the lower section in display area 21, in the case where not influencing the requirement of aperture opening ratio of display area as far as possible,
Dummy gate line DG1, DG2, DG3, DG4 are configurable on any position on panel, or are disposed on outside display area 21.
The driver' s timing of dummy gate line DG1, DG2, DG3, DG4 are as shown in figure 11, are driven into touch-control driving in display
Before, the time point on the rising edge edge of virtual clock signal C1 can fall in the time point on the trailing edge edge of clock signal CK9；When virtual
The time point on the rising edge edge of clock signal C2 can fall in the time point on the trailing edge edge of clock signal CK10；Virtual clock signal C3
Rising edge edge time point can fall in clock signal CK11 trailing edge edge time point；The rising edge of virtual clock signal C4
The time point on edge can fall in the time point on the trailing edge edge of clock signal CK12.In this way, before due to entering touch-control driving
The time point on the trailing edge edge of the pulse of last four clock signal CK9~CK12, with driving dummy gate line DG1, DG2,
The time point on the rising edge edge of four virtual clock signal C1~C4 of DG3, DG4 is overlapped, therefore to the voltage of common electrode
Coupling can mutually offset, and the voltage Vcom of common electrode is switched to when touch-control drives from display driving and would not be beated, into
And solve the problems, such as color spot.
Similarly, after touch-control is driven into display driving, the time point on the trailing edge edge of virtual clock signal C1 can be fallen
Time point on the rising edge edge of clock signal CK1；The time point on the trailing edge edge of virtual clock signal C2 can fall in clock letter
The time point on the rising edge edge of number CK2；The time point on the trailing edge edge of virtual clock signal C3 can fall in the upper of clock signal CK3
Rise the time point at edge；The time point on the trailing edge edge of virtual clock signal C4 can fall in the rising edge edge of clock signal CK4
Time point.In this way, due to the rising edge edge for the pulse for entering most the forth day of a lunar month clock signal CK1~CK4 after display drives
Time point, with driving dummy gate line DG1, DG2, DG3, DG4 four clock signal C1~C4 trailing edge edge when
Between put overlapping, therefore the coupling of the voltage of common electrode can be mutually offsetted, the voltage Vcom of common electrode drives from touch-control to be switched
It would not beat when at display driving, and then solve the problems, such as color spot.
It is worth noting that, though the embodiment of the present invention, which enumerates four virtual clock signal C1~C4, respectively drives virtual grid
Polar curve DG1, DG2, DG3, DG4 come offset common electrode voltage because coupling and generate bounce.However, dummy gate line
For number there is no limiting, the number of dummy gate line is the scanning according to corresponding to the pulse width of clock signal CK1~CK12
Depending on signal number, due to a pulse of clock signal CK1~CK12 in embodiment during meeting there are four scanning signal it is defeated
Out, therefore embodiment designs four virtual clock signals to offset.Though being driven in addition, the present embodiment is driven into touch-control in display
Virtual clock signal C1~C4 is all exported before dynamic and after touch-control is driven into display driving, but if when touch-control is driven into
The voltage Vcom bounce of common electrode after display driving does not impact display, and the present invention can also be only driven into display
Virtual clock signal is exported before touch-control driving.
Also, the display area of In-cell touch display panel is only divided into two regions up and down, then a kind of change can be taken
The mode of scanning direction solves the problems, such as boundary color spot.Figure 12 is driving scanning mode according to an embodiment of the invention.
As shown in figure 12, the display area 31 of In-cell touch display panel 30, which is divided to, carries out subregion driving for two regions R1, R2.It is aobvious
Show and region R1 is scanned by column until display area from the center of picture towards first direction A (such as upper direction) when driving
Edge, subsequently enter touch-control driving, display driving be again introduced into after the completion of touch-control driving, from the center of picture towards second party
Region R2 is scanned by column until the edge of display area to B (such as lower direction), then enters back into touch-control driving.Due to
Display driving, which switches to touch-control driving, to be occurred after scanning grid line to display area edge, therefore even if display area
Lower edges generate color spot, be also not readily observed.Another solution is provided whereby.
It is driven finally, due to which the time of driving must be distributed to display driving by In-cell touch display panel with touch-control,
Therefore it compared to ordinary display panel, is compressed during display, may cause undercharge in GOP circuit, and sent out weaker
Scanning signal.In this regard, the driving frequency of In-cell touch display panel is adjusted in the present invention, for example, by the picture of script 60Hz
Driving frequency falls to 50Hz.The charging time in GOP circuit is improved whereby.
The various embodiments described above according to the present invention, the present invention provide a kind of In-cell touch display panel and its driving method,
It can not continue transmitting to improve above-mentioned signal, zone boundary leads to the problem of color spot, the decline of GOP circuit drives power.
Though the present invention illustrates that but it is not limited to this with above-described embodiment.Furthermore, in those skilled in the art
Do not depart under idea of the invention and equivalents, claims must widely explain with include the embodiment of the present invention and
Other deformations.
Claims (8)
1. a kind of In-cell touch display panel, during being alternately driven in display and during touch-control, comprising:
Multiple pixels configure in the In-cell touch display panel；
A plurality of grid line is respectively connected to the pixel of each column, and each grid line is believed by clock when during the display
It number drives and sends out scanning signal, stop sending out the scanning signal during the touch-control；And
N dummy gate line, is not attached to any pixel, and before being switched to during the touch-control during the display, each should
Dummy gate line is driven by virtual clock signal and sends out virtual scan signal, and wherein N is more than or equal to 1,
The time point on the rising edge edge of N number of virtual clock signal of the N dummy gate line is wherein driven to be synchronized with drive respectively
Move the time point on the trailing edge edge of N number of clock signal of N grid line in a plurality of grid line.
2. In-cell touch display panel as described in claim 1, wherein N number of clock signal is switched to during the display
N number of signal of the N grid line finally driven before during the touch-control.
3. In-cell touch display panel as claimed in claim 1 or 2, wherein each of the N dummy gate line also exists
After being switched to during the touch-control during the display, is driven by the second virtual clock signal and sends out the virtual scan signal,
The time point on the trailing edge edge of N number of second virtual clock signal of the N dummy gate line is wherein driven to synchronize respectively
In the time point for driving the rising edge edge of other N number of clock signal of other N grid line in a plurality of grid line.
4. In-cell touch display panel as claimed in claim 3, wherein other N number of clock signal is during the touch-control
N number of signal of the N grid line driven at first after during being switched to the display.
5. a kind of driving method of In-cell touch display panel, wherein the In-cell touch display panel includes:
Multiple pixels configure in the In-cell touch display panel；
A plurality of grid line is respectively connected to the pixel of each column；And
N dummy gate line, is not attached to any pixel, and wherein N is more than or equal to 1,
The driving method of the In-cell touch display panel includes:
The In-cell touch display panel is alternately driven during display and during touch-control；
During the display, drive a plurality of grid line to send out scanning signal by column with multiple clock signals；
Before entering during the touch-control during the display, drive the N dummy gate line to send by column with N number of virtual clock signal
Virtual scan signal out, wherein N is more than or equal to 1；And
It is synchronized with the time point on the rising edge edge of N number of virtual clock signal respectively and drives N grid in a plurality of grid line
The time point on the trailing edge edge of N number of clock signal of line.
6. the driving method of In-cell touch display panel as claimed in claim 5, wherein N number of clock signal is aobvious at this
N number of signal of the N grid line finally driven before during being switched to the touch-control during showing.
7. such as the driving method of In-cell touch display panel described in claim 5 or 6, further includes:
After entering during the display during the touch-control, which is driven through with N number of second virtual clock signal
To send out the virtual scan signal by column；And
It is synchronized with the time point on the trailing edge edge of N number of second virtual clock signal respectively to drive in a plurality of grid line in addition
The time point on the rising edge edge of other N number of clock signal of N grid line.
8. the driving method of In-cell touch display panel as claimed in claim 7, wherein other N number of clock signal exists
N number of signal of the N grid line driven at first after during being switched to the display during the touch-control.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201562188088P | 2015-07-02 | 2015-07-02 | |
| US62/188,088 | 2015-07-02 |
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| CN106325633B true CN106325633B (en) | 2019-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510988165.9A Active CN106325633B (en) | 2015-07-02 | 2015-12-24 | In-cell touch display panel and its driving method |
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| CN (1) | CN106325633B (en) |
| TW (1) | TWI575490B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI724606B (en) * | 2017-05-10 | 2021-04-11 | 聯詠科技股份有限公司 | Driving apparatus and driving method for driving touch display panel |
| TWI630525B (en) * | 2017-09-05 | 2018-07-21 | 友達光電股份有限公司 | Non in-cell touch display apparatus and touch detection method thereof |
| CN109509414A (en) * | 2017-09-15 | 2019-03-22 | 敦泰电子有限公司 | Embedded display equipment and its scan method |
| CN109491158B (en) * | 2018-11-16 | 2021-08-17 | 昆山龙腾光电股份有限公司 | Display panel and display device |
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| TWI575490B (en) | 2017-03-21 |
| CN106325633A (en) | 2017-01-11 |
| TW201703014A (en) | 2017-01-16 |
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