CN203966089U - Touch display screen - Google Patents
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- CN203966089U CN203966089U CN201420255930.7U CN201420255930U CN203966089U CN 203966089 U CN203966089 U CN 203966089U CN 201420255930 U CN201420255930 U CN 201420255930U CN 203966089 U CN203966089 U CN 203966089U
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Abstract
The utility model provides a kind of touch display screen, comprise: gate driver circuit, source electrode drive circuit and multiple scanning circuit, multiple scanning circuit is connected with the multistage shifting deposit unit of gate driver circuit, in predetermined amount of time before a rear drive cycle in adjacent two drive cycles starts, multiple scanning circuit can will draw the current potential of node to be pulled to high level on shifting deposit unit corresponding to the N-n+1 bar sweep trace in the N bar sweep trace that in adjacent two drive cycles, previous drive cycle is corresponding, and will on shifting deposit unit corresponding to the n+1 bar sweep trace in N bar sweep trace corresponding to a rear drive cycle, draw the current potential of node to be pulled down to low level, so that in adjacent two drive cycles, the rear n bar sweep trace of the N bar sweep trace scanning in previous drive cycle is identical with the front n bar sweep trace of the N bar sweep trace scanning in a rear drive cycle.Touch display screen can show coherent picture.
Description
Technical field
The utility model relates to display technique field, particularly, relates to a kind of touch display screen.
Background technology
Along with popularizing of smart mobile phone, touch display screen is also widely used.When driving touch display screen, conventionally need to carry out timesharing driving to touch display screen.; each drive cycle of touch display screen comprises demonstration stage and touch-control stage; within the demonstration stage; the sweep trace that the gate drivers of touch display screen is touch display screen provides sweep signal; within the touch stage, the touch-control driver of touch display screen drives signal for touch display screen provides touch-control.
The schematic diagram of the drive cycle of existing touch display screen has been shown, T in Fig. 1
11represent previous drive cycle T
1in the demonstration stage, T
12represent previous drive cycle T
11the touch-control stage, T
21represent the demonstration stage in a rear drive cycle.As shown in FIG., at the demonstration stage of previous drive cycle T
11in, scanned successively the sweep trace that is numbered 1,2,3,4, at the demonstration stage of rear drive cycle T
21in, scanned successively the sweep trace that is numbered 5,6,7,8.
But while utilizing the timesharing driving method shown in Fig. 1 to drive, the demonstration of touch display screen there will be discontinuous phenomenon.
Therefore, how to improve while adopting timesharing driving method to drive, the demonstration continuity of touch display screen becomes this area technical matters urgently to be resolved hurrily.
Utility model content
The purpose of this utility model is to provide a kind of touch display screen.When touch display screen provided by the utility model shows, can obtain comparatively coherent display frame.
To achieve these goals, the utility model provides a kind of touch display screen, and the drive cycle of described touch display screen comprises demonstration stage and touch-control stage, and described touch display screen comprises:
Gate driver circuit, this gate driver circuit comprises the shifting deposit unit of multi-stage cascade, within the described demonstration stage, to N level shifting deposit unit, for the N bar sweep trace to described touch display screen, provides sweep signal;
Source electrode drive circuit, described source electrode drive circuit can provide GTG signal to the data line of described touch display screen in the described demonstration stage, wherein,
Described touch display screen also comprises:
Multiple scanning circuit, described multiple scanning circuit is connected with the multistage described shifting deposit unit of described gate driver circuit, in predetermined amount of time before a rear drive cycle in adjacent two described drive cycles is started, described multiple scanning circuit can will draw the current potential of node to be pulled to high level on shifting deposit unit corresponding to the N-n+1 bar sweep trace in the N bar sweep trace that in adjacent two drive cycles, previous drive cycle is corresponding, and will on shifting deposit unit corresponding to the n+1 bar sweep trace in N bar sweep trace corresponding to a rear drive cycle, draw the current potential of node to be pulled down to low level, so that in adjacent two drive cycles, the rear n bar sweep trace of the N bar sweep trace scanning in previous drive cycle is identical with the front n bar sweep trace of the N bar sweep trace scanning in a rear drive cycle, wherein, N, n is natural number, and N > n, described predetermined amount of time continues to a rear described drive cycle to start.
Preferably, N is that 4, n is 2.
Preferably, described multiple scanning circuit comprises:
Multiple scanning signal source, this multiple scanning signal source starts to provide control signal for predetermined instant before a rear drive cycle of adjacent two described drive cycles starts, the high level signal of described multiple scanning signal source continues to a rear described drive cycle start till; With
A plurality of multiple scanning control modules, the 2N-n bar sweep trace being scanned in adjacent two described drive cycles is corresponding to a described multiple scanning control module, described in each, multiple scanning control module is all connected with described multiple scanning signal source, when described multiple scanning signal source is exported described control signal, described multiple scanning control module is drawn node output high level on shifting deposit unit corresponding to the N-n+1 bar sweep trace in the N bar sweep trace scanning in previous drive cycle, and will on shifting deposit unit corresponding to the n+1 bar sweep trace of a rear drive cycle, draw the current potential of node to be pulled down to low level.
Preferably, described multiple scanning control module comprises:
The first control module, this first control module for drawing node output high level when described multiple scanning signal source provides described control signal on N level shifting deposit unit N-n+1 level shifting deposit unit corresponding to previous described drive cycle;
The second control module, this second control module for will drawing the current potential of node to be pulled down to low level on N level shifting deposit unit n+1 level shifting deposit unit corresponding to a rear described drive cycle when described multiple scanning signal source provides described control signal.
Preferably, described the first control module comprises the first film transistor, the transistorized grid of this first film is connected with described multiple scanning signal source, in transistorized first utmost point of the described the first film N level shifting deposit unit corresponding with previous described drive cycle afterbody shifting deposit unit on draw node to be connected, in transistorized second utmost point of the described the first film N level shifting deposit unit corresponding with previous described drive cycle N-n+1 level shifting deposit unit on draw node to be connected.
Preferably, the second control module comprises the second thin film transistor (TFT), the grid of this second thin film transistor (TFT) is connected with described multiple scanning signal source, in first utmost point of described the second thin film transistor (TFT) N level shifting deposit unit corresponding with a rear described drive cycle n+1 level shifting deposit unit on draw node to be connected, second utmost point of described the second thin film transistor (TFT) is connected with low level input end.
Preferably, the high level signal duration of described multiple scanning signal source is identical with the high level signal duration of clock signal in described gate driver circuit.
Preferably, described touch display screen also comprises signal circuit board, for provide the signal wire of electric signal to be arranged on described signal circuit board to touch display screen.
During touch display screen display frame provided by the utility model, can in a rear drive cycle, carry out multiple scanning by the rear n bar sweep trace to previous drive cycle, after multiple scanning, can so that shifting deposit unit corresponding to the n+1 bar sweep trace in a rear drive cycle (being equivalent to the 1st sweep trace in a rear drive cycle in prior art) on to draw the level of node be high level, on the shifting deposit unit that the n+1 bar sweep trace that scans in a rear drive cycle is corresponding, draw after drawing as high level on node and no longer experience the touch-control stage, therefore, on the shifting deposit unit that the n+1 bar sweep trace that scans in a rear drive cycle is corresponding, draw node can keep well high level, thereby corresponding image during this sweep trace of reading scan more accurately, thereby the image that the described touch display screen that makes to get profit shows is comparatively coherent.
Accompanying drawing explanation
Accompanying drawing is to be used to provide further understanding of the present utility model, and forms a part for instructions, is used from explanation the utility model, but does not form restriction of the present utility model with embodiment one below.In the accompanying drawings:
Fig. 1 is the schematic diagram of the drive cycle of timesharing driving method of the prior art;
Fig. 2 is the schematic diagram of drive cycle that drives the timesharing driving method of touch display screen provided by the utility model;
Fig. 3 is while utilizing the timesharing driving method shown in Fig. 2 to drive touch display screen, the sequential chart of the sweep signal of exporting on the first clock signal, second clock signal and each sweep trace;
Fig. 4 is the circuit diagram of touch display screen provided by the utility model;
Fig. 5 draws the sequential chart of node on each control signal of touch display screen provided by the utility model and shifting deposit unit at different levels.
Description of reference numerals
100: signal circuit board 200: gate driver circuit
300: 310: the first control modules of multiple scanning circuit
Within 320: the second, control module 330: multiple scanning signal source
1,2,3,4,5,6: sweep trace
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the utility model, is not limited to the utility model.
Through inventor of the present utility model, repeatedly study discovery, while utilizing the timesharing driving method shown in Fig. 1 to drive, why there will be show discontinuous phenomenon be not because the duration in touch-control stage long, but because at previous demonstration stage T
11after end, on the shifting deposit unit of sweep trace 5 correspondences, draw node to be pulled to high level, at process touch-control stage T
12afterwards, on the shifting deposit unit of sweep trace 5 correspondences, draw node electric leakage, corresponding image while causing normal reading scan sweep trace 5, thus while having caused demonstration, image is discontinuous.
For the problems referred to above, the utility model provides a kind of touching display screen, and the drive cycle of described touch display screen comprises demonstration stage and touch-control stage, and as shown in Figure 4, described touch display screen comprises:
Gate driver circuit 200, this gate driver circuit 200 comprises the shifting deposit unit of multi-stage cascade, within the described demonstration stage, N level shifting deposit unit provides sweep signal for the N bar sweep trace to described touch display screen;
Source electrode drive circuit, described source electrode drive circuit can provide GTG signal to the data line of described touch display screen in the described demonstration stage, wherein,
Described touch display screen also comprises:
Multiple scanning circuit 300, this multiple scanning circuit 300 is connected with the multistage described shifting deposit unit of described gate driver circuit, in predetermined amount of time t1 before a rear drive cycle in adjacent two described drive cycles is started, multiple scanning circuit 300 can will draw node to be pulled to high level VGH on shifting deposit unit corresponding to the N-n+1 bar sweep trace in the N bar sweep trace that in adjacent two drive cycles, previous drive cycle is corresponding, and will on shifting deposit unit corresponding to the n+1 bar sweep trace in N bar sweep trace corresponding to a rear drive cycle, draw the current potential of node to be pulled down to low level VGL, so that in adjacent two drive cycles, the rear n bar sweep trace of the N bar sweep trace scanning in previous drive cycle is identical with the front n bar sweep trace of the N bar sweep trace scanning in a rear drive cycle, wherein, N, n is natural number, and N > n, described predetermined amount of time continues to a rear described drive cycle to start.
Can adopt following timesharing driving method to drive above-mentioned touch display screen, described timesharing driving method comprises a plurality of drive cycles, as shown in Figure 2, in two described drive cycles of arbitrary neighborhood, previous described drive cycle T
1comprise:
S1, to the N bar sweep trace being arranged in order in described touch display screen, provide sweep signal;
S2, stop providing sweep signal to the array base palte of touch display screen, and to the touch modules of described touch display screen, provide to touch and drive signal;
A rear described drive cycle comprises:
S3, to the N bar sweep trace being arranged in order in described touch display screen, provide sweep signal;
S4, stop providing sweep signal to the array base palte of described touch display screen, and to the touch modules of described touch display screen, provide to touch and drive signal,
Wherein, the front n bar sweep trace scanning in described step S3 is the rear n bar sweep trace scanning in step S1, N, n are natural number, N > n, and the GTG signal of the front n bar sweep trace scanning in step S3 is identical correspondingly with the GTG signal of the rear n bar sweep trace scanning in step S1.
That as shown in Figure 2, step S1 is corresponding is previous drive cycle T
1in demonstration stage T
11, that step S2 is corresponding is the touch-control stage T in previous drive cycle
12, that step S3 is corresponding is the demonstration stage T in a rear drive cycle
21, what step S4 was corresponding is the touch-control stage (not shown) in a rear drive cycle.
Because the front n bar sweep trace scanning in described step S3 is the rear n bar sweep trace scanning in step S1, be equivalent to the rear n bar sweep trace to previous drive cycle in a rear drive cycle and carried out multiple scanning, after multiple scanning, can so that shifting deposit unit corresponding to the n+1 bar sweep trace in a rear drive cycle (being equivalent to the 1st sweep trace in a rear drive cycle in prior art) on to draw the level of node be high level, on the shifting deposit unit that the n+1 bar sweep trace that scans in a rear drive cycle is corresponding, draw after drawing as high level on node and no longer experience the touch-control stage, therefore, on the shifting deposit unit that the n+1 bar sweep trace that scans in a rear drive cycle is corresponding, draw node can keep well high level, thereby can provide enough strong sweep signal, so that the thin film transistor (TFT) being connected with sweep trace is opened completely, thereby can GTG signal be carried on pixel electrode completely, corresponding image during with this sweep trace of reading scan more accurately, thereby make to utilize the image of timesharing driving method demonstration provided by the utility model comparatively coherent.
Hold and be intelligiblely, the GTG signal of the front n bar sweep trace scanning in step S3 is identical correspondingly with the GTG signal of the rear n bar sweep trace scanning in step S1,, when multiple scanning n bar sweep trace, source electrode driver provides identical GTG signal, and the image showing when making the image that shows and scanning for the second time n bar sweep trace when scanning n bar sweep trace is for the first time identical.Because sweep frequency is higher, human eye can not told the image of multiple scanning, and therefore, human eye can be observed comparatively coherent image.
In the utility model, to each when scanning inswept sweep trace number and be not specifically limited, for example, as a kind of embodiment of the present utility model, N can be 2 for 4, n as shown in Figure 2.
Below in conjunction with Fig. 2, specifically introduce the embodiment of timesharing driving method provided by the utility model.
In step S1, scan successively article one sweep trace 1, second sweep trace 2, the 3rd sweep trace 3 and the 4th sweep trace 4; In step S2, stop providing sweep signal to the array base palte of touch display screen, and provide touch to drive signal to the touch modules of described touch display screen; In step S3, the 3rd sweep trace 3 of multiple scanning and the 4th sweep trace 4, and then the 5th sweep trace 5 of sequential scanning and the 6th sweep trace 6; In step S4, stop providing sweep signal to the array base palte of touch display screen, and provide touch to drive signal to the touch modules of described touch display screen.
Shown in Fig. 3 is while utilizing the timesharing driving method shown in Fig. 2 to drive touch display screen, the sequential chart of the sweep signal of exporting on the first clock signal clk, second clock signal CLKB and each sweep trace.Stop inputting the first clock signal clk and second clock signal CLKB can not produce sweep signal.
Wherein, the GTG signal that the GTG signal that while scanning the 3rd sweep trace 3 in step S1, source electrode driver provides source electrode driver when scanning the 3rd sweep trace 3 in step S3 provides is identical, and the GTG signal that the GTG signal that while scanning the 4th sweep trace 4 in step S1, source electrode driver provides source electrode driver when scanning the 4th sweep trace 4 in step S3 provides is identical.
Those skilled in the art hold is intelligiblely, touch display screen provided by the utility model also comprises signal circuit board 100, for providing the signal wire of the electric signal such as the first clock signal clk, second clock signal CLKB, initialize signal STV, ground level Vss to be arranged on signal circuit board 100.A sweep trace on the array base palte of every grade of corresponding touch display screen of shifting deposit unit, the signal of shifting deposit unit output is the sweep signal of corresponding sweep trace.
As shown in Figure 5, the sequential of the first clock signal clk and second clock signal CLKB is complementary, when the first clock signal clk is high level VGH, second clock signal CLKB is low level VGL, when the first clock signal clk is low level VGL, second clock signal CLKB is high level VGH, and the pulse width of the first clock signal clk is identical with the pulse width of second clock signal CLKB.
In the utility model, in the touch-control stage, the first clock signal clk and second clock signal CLKB stop input, in predetermined amount of time t1 before a rear drive cycle starts, multiple scanning circuit 300 can will draw the current potential of node to be pulled to high level VGH by low level VGL on shifting deposit unit corresponding to the N-n+1 bar sweep trace in the N bar sweep trace scanning in previous drive cycle, and will on shifting deposit unit corresponding to the n+1 bar sweep trace of a rear drive cycle, draw the current potential of node to be pulled down to low level VGL simultaneously.
On the shifting deposit unit that N-n+1 bar sweep trace in the N bar sweep trace scanning in previous drive cycle is corresponding, draw the current potential of node to be pulled to after high level VGH by low level VGL, after the touch-control stage of previous drive cycle finishes, N-n+1 bar sweep trace in the N bar sweep trace scanning in previous drive cycle (that is article one sweep trace in the N bar sweep trace, scanning in a rear drive cycle) is scanned again.Should be understood that, in the prior art, after previous drive cycle finishes, article one sweep trace of a rear drive cycle (being equivalent to the n+1 bar sweep trace in a rear drive cycle in the utility model) should be scanned, herein, on the shifting deposit unit that the n+1 bar sweep trace of a rear drive cycle is corresponding, draw the current potential of node to be pulled down to low level VGL, therefore, the n+1 bar sweep trace of a rear drive cycle can not be scanned.
As noted before, n bar sweep trace is carried out after multiple scanning, can so that shifting deposit unit corresponding to the n+1 bar sweep trace scanning in a rear drive cycle (being equivalent to the 1st sweep trace in a rear drive cycle in prior art) on to draw the level of node be high level, on the shifting deposit unit that the n+1 bar sweep trace that scans in a rear drive cycle is corresponding, draw after drawing as high level on node and no longer experience the touch-control stage, therefore, on the shifting deposit unit that the n+1 bar sweep trace that scans in a rear drive cycle is corresponding, draw node can keep well high level, thereby can provide enough strong sweep signal, so that the thin film transistor (TFT) being connected with sweep trace is opened completely, thereby can GTG signal be carried on pixel electrode completely, corresponding image during with this sweep trace of reading scan more accurately, thereby make to utilize the image of timesharing driving method demonstration provided by the utility model comparatively coherent.
In the utility model, the concrete structure of multiple scanning circuit 300 is not had to special restriction, as long as can draw node that corresponding level signal is provided in described predetermined amount of time t1 on corresponding shifting deposit unit.Introduce a kind of concrete structure of multiple scanning circuit 300 below.As shown in Figure 4, as a kind of preferred implementation of the present utility model, multiple scanning circuit 300 can comprise:
Multiple scanning signal source 330, predetermined instant before this multiple scanning signal source 330 starts for the rear drive cycle at adjacent two described drive cycles starts to provide control signal Rescan, the high level signal of multiple scanning signal source 330 continues to a rear described drive cycle start till, with a plurality of multiple scanning control modules, the 2N-n bar sweep trace being scanned in adjacent two described drive cycles is corresponding to a described multiple scanning control module, described in each, multiple scanning control module is all connected with described multiple scanning signal source, when described multiple scanning signal source is exported described control signal Rescan, described multiple scanning control module is drawn node output high level on shifting deposit unit corresponding to the N-n+1 bar sweep trace in the N bar sweep trace scanning in previous drive cycle, and will on shifting deposit unit corresponding to the n+1 bar sweep trace of a rear drive cycle, draw the current potential of node to be pulled down to low level.
Herein, the effect of multiple scanning signal source is to provide control signal Rescan, makes multiple scanning process become more controlled.
In order to be more convenient to control, preferably, described multiple scanning control module can comprise:
The first control module 310, this first control module 310 for drawing node output high level when multiple scanning signal source 330 provides described control signal on N level shifting deposit unit N-n+1 level shifting deposit unit corresponding to previous described drive cycle;
The second control module 320, this second control module 320 for will drawing the current potential of node to be pulled down to low level on N level shifting deposit unit n+1 level shifting deposit unit corresponding to a rear described drive cycle when multiple scanning signal source 330 provides described control signal.
The first control module 310 is for high level signal is provided, and the second control module 320 is for providing low level signal.Utilize same control signal Rescan can realize the control to the first control module 310 and the second control module 320 simultaneously, thus can be so that the structure of multiple scanning circuit 300 be simpler.
As a kind of preferred implementation of the present utility model, the first control module 310 can comprise the first film transistor T 1, the grid of this first film transistor T 1 is connected with multiple scanning signal source 330, in first utmost point of the first film transistor T 1 N level shifting deposit unit corresponding with previous drive cycle afterbody shifting deposit unit on draw node to be connected, in second utmost point of the first film transistor T 1 N level shifting deposit unit corresponding with previous drive cycle N-n+1 level shifting deposit unit on draw node to be connected.Hold intelligible, herein first utmost point of the first film transistor T 1 be the first film transistor T 1 source electrode and drain electrode in one, second utmost point of the first film transistor T 1 be the first film transistor T 1 source electrode and drain electrode in another one.
When multiple scanning signal source 330 is exported the control signal of high level, the first film transistor T 1 is switched on.Before the control signal of multiple scanning signal source 330 output high level, in N level shifting deposit unit corresponding to previous drive cycle afterbody shifting deposit unit on draw node output high level VGH, therefore, first of the first film transistor T 1 the high level VGH very.The first film transistor T 1 is in conducting state, thereby can will on N-n+1 level shifting deposit unit in N level shifting deposit unit corresponding to previous drive cycle, draw the level of node to be pulled to high level VGH.
Similarly, the second control module 320 can comprise the second thin film transistor (TFT) T2, the grid of this second thin film transistor (TFT) T2 is connected with multiple scanning signal source 330, in first utmost point of the second thin film transistor (TFT) T2 N level shifting deposit unit corresponding with a rear described drive cycle n+1 level shifting deposit unit on draw node to be connected, second utmost point of described the second thin film transistor (TFT) is connected with low level input end.Hold intelligiblely, sweep trace corresponding to n+1 level shifting deposit unit in a rear drive cycle has been article one sweep trace scanning after multiple scanning.Hold intelligible, herein first utmost point of the second thin film transistor (TFT) T2 be the second thin film transistor (TFT) T2 source electrode and drain electrode in one, second utmost point of the second thin film transistor (TFT) T2 be the second thin film transistor (TFT) T2 source electrode and drain electrode in another one.
When multiple scanning signal source 330 is exported the control signal of high level, the second thin film transistor (TFT) T2 is switched on.Before the control signal of multiple scanning signal source 330 output high level, in N level shifting deposit unit corresponding to a rear described drive cycle n+1 level shifting deposit unit on to draw the current potential of node be high level VGH.After the second thin film transistor (TFT) T2 conducting, the low level VGL of second utmost point of the second thin film transistor (TFT) T2 can will draw the current potential of node to be pulled down to low level VGL on n+1 level shifting deposit unit in N level shifting deposit unit corresponding to a rear described drive cycle, therefore, after the touch-control stage in previous drive cycle finishes, the sweep trace that in N level shifting deposit unit corresponding to a rear drive cycle, n+1 level shifting deposit unit is corresponding can output scanning signal, that is, can not be scanned.
Hold intelligiblely, comprise the first control module 310 of the first film transistor T 1 and comprise that the second control module 320 of the second thin film transistor (TFT) T2 is simple in structure, be easy to realize.
Conventionally, the high level signal duration of described multiple scanning signal source is identical with the high level signal duration of clock signal in described gate driver circuit.
The principle of work of the touch display screen shown in Fig. 4 is described according to the sequential chart shown in Fig. 5 below.
As shown in Figure 4, sweep trace 2 corresponding displaced deposit unit R2, sweep trace 3 corresponding displaced deposit unit R3, sweep trace 4 corresponding displaced deposit unit R4, sweep trace 5 corresponding displaced deposit unit R5, sweep trace 6 is corresponding to shifting deposit unit R6.
First, at the demonstration stage of previous drive cycle T
11in, sweep trace 1 to sweep trace 4 is scanned, after sweep trace 4 output scanning signals, the current potential that draws node 3-PU on the shifting deposit unit R3 of sweep trace 3 correspondences is low level VGL, on the shifting deposit unit R4 of sweep trace 4 correspondences, drawing the current potential of node 4-PU to drop to VGH by 2VGH, is still high level.
Enter subsequently the touch stage T of previous drive cycle
12, this touches node T
12in, the first clock signal clk and second clock signal CLKB all stop input.Therefore, on the shifting deposit unit R3 of sweep trace 3 correspondences, draw the current potential of node 3-PU to maintain low level VGL, on the shifting deposit unit R4 of sweep trace 4 correspondences, draw the current potential of node 4-PU to maintain high level VGH.First touches stage T
12predetermined instant before end, multiple scanning circuit 300 output control signal Rescan, this control signal Rescan is the first film transistor T 1 conducting in the first control module 310, and by the second thin film transistor (TFT) T2 conducting in the second control module 320.After 1 conducting of the first film transistor T, will on the shifting deposit unit R3 of sweep trace 3 correspondences, draw the current potential of node 3-PU to be pulled to high level VGH by low level VGL.After the second thin film transistor (TFT) T2 conducting, and will on the shifting deposit unit R5 of sweep trace 5 correspondences, draw the current potential of node 5-PU to be pulled down to low level VGL.The touch-control stage in previous drive cycle, while finishing, the control signal Rescan of multiple scanning circuit 300 outputs was also low level VGL by high level VGH saltus step.
Again subsequently, the demonstration stage T of a rear drive cycle
21start, the first clock signal clk and second clock signal CLKB export again.Owing to drawing the current potential of node 3-PU on the shifting deposit unit R3 of sweep trace 3 correspondences, be high level VGH, therefore, at the demonstration stage of rear drive cycle T
21during beginning, output scanning signal on sweep trace 3, sweep trace 4 output scanning signals subsequently, more subsequently, the sweep signal of sweep trace 4 output is exported to the shifting deposit unit R5 of sweep trace 5 correspondences, thus make sweep trace 5 can be after sweep trace 4 output scanning signals output scanning signal.
Be understandable that, above embodiment is only used to principle of the present utility model is described and the illustrative embodiments that adopts, yet the utility model is not limited to this.For those skilled in the art, in the situation that not departing from spirit of the present utility model and essence, can make various modification and improvement, these modification and improvement are also considered as protection domain of the present utility model.
Claims (8)
1. a touch display screen, the drive cycle of described touch display screen comprises demonstration stage and touch-control stage, described touch display screen comprises:
Gate driver circuit, this gate driver circuit comprises the shifting deposit unit of multi-stage cascade, within the described demonstration stage, to N level shifting deposit unit, for the N bar sweep trace to described touch display screen, provides sweep signal;
Source electrode drive circuit, described source electrode drive circuit can provide GTG signal to the data line of described touch display screen in the described demonstration stage, it is characterized in that,
Described touch display screen also comprises:
Multiple scanning circuit, described multiple scanning circuit is connected with the multistage described shifting deposit unit of described gate driver circuit, in predetermined amount of time before a rear drive cycle in adjacent two described drive cycles is started, described multiple scanning circuit can will draw the current potential of node to be pulled to high level on shifting deposit unit corresponding to the N-n+1 bar sweep trace in the N bar sweep trace that in adjacent two drive cycles, previous drive cycle is corresponding, and will on shifting deposit unit corresponding to the n+1 bar sweep trace in N bar sweep trace corresponding to a rear drive cycle, draw the current potential of node to be pulled down to low level, so that in adjacent two drive cycles, the rear n bar sweep trace of the N bar sweep trace scanning in previous drive cycle is identical with the front n bar sweep trace of the N bar sweep trace scanning in a rear drive cycle, wherein, N, n is natural number, and N > n, described predetermined amount of time continues to a rear described drive cycle to start.
2. touch display screen according to claim 1, is characterized in that, N is that 4, n is 2.
3. touch display screen according to claim 2, is characterized in that, described multiple scanning circuit comprises:
Multiple scanning signal source, this multiple scanning signal source starts to provide control signal for predetermined instant before a rear drive cycle of adjacent two described drive cycles starts, the high level signal of described multiple scanning signal source continues to a rear described drive cycle start till; With
A plurality of multiple scanning control modules, the 2N-n bar sweep trace being scanned in adjacent two described drive cycles is corresponding to a described multiple scanning control module, described in each, multiple scanning control module is all connected with described multiple scanning signal source, when described multiple scanning signal source is exported described control signal, described multiple scanning control module is drawn node output high level on shifting deposit unit corresponding to the N-n+1 bar sweep trace in the N bar sweep trace scanning in previous drive cycle, and will on shifting deposit unit corresponding to the n+1 bar sweep trace of a rear drive cycle, draw the current potential of node to be pulled down to low level.
4. touch display screen according to claim 3, is characterized in that, described multiple scanning control module comprises:
The first control module, this first control module for drawing node output high level when described multiple scanning signal source provides described control signal on N level shifting deposit unit N-n+1 level shifting deposit unit corresponding to previous described drive cycle;
The second control module, this second control module for will drawing the current potential of node to be pulled down to low level on N level shifting deposit unit n+1 level shifting deposit unit corresponding to a rear described drive cycle when described multiple scanning signal source provides described control signal.
5. touch display screen according to claim 4, it is characterized in that, described the first control module comprises the first film transistor, the transistorized grid of this first film is connected with described multiple scanning signal source, in transistorized first utmost point of the described the first film N level shifting deposit unit corresponding with previous described drive cycle afterbody shifting deposit unit on draw node to be connected, in transistorized second utmost point of the described the first film N level shifting deposit unit corresponding with previous described drive cycle N-n+1 level shifting deposit unit on draw node to be connected.
6. touch display screen according to claim 4, it is characterized in that, the second control module comprises the second thin film transistor (TFT), the grid of this second thin film transistor (TFT) is connected with described multiple scanning signal source, in first utmost point of described the second thin film transistor (TFT) N level shifting deposit unit corresponding with a rear described drive cycle n+1 level shifting deposit unit on draw node to be connected, second utmost point of described the second thin film transistor (TFT) is connected with low level input end.
7. according to the touch display screen described in any one in claim 3 to 6, it is characterized in that, the high level signal duration of described multiple scanning signal source is identical with the high level signal duration of clock signal in described gate driver circuit.
8. touch display screen according to claim 1, is characterized in that, described touch display screen also comprises signal circuit board, for provide the signal wire of electric signal to be arranged on described signal circuit board to touch display screen.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108877625A (en) * | 2018-07-06 | 2018-11-23 | 京东方科技集团股份有限公司 | Gate driving circuit and its driving method, display device |
| CN110111754A (en) * | 2015-07-17 | 2019-08-09 | 群创光电股份有限公司 | Gate driving circuit |
| US11170696B2 (en) * | 2017-05-22 | 2021-11-09 | Beijing Boe Optoelectronics Technology Co., Ltd. | Gate drive circuit and display panel |
-
2014
- 2014-05-19 CN CN201420255930.7U patent/CN203966089U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110111754A (en) * | 2015-07-17 | 2019-08-09 | 群创光电股份有限公司 | Gate driving circuit |
| US11170696B2 (en) * | 2017-05-22 | 2021-11-09 | Beijing Boe Optoelectronics Technology Co., Ltd. | Gate drive circuit and display panel |
| CN108877625A (en) * | 2018-07-06 | 2018-11-23 | 京东方科技集团股份有限公司 | Gate driving circuit and its driving method, display device |
| CN108877625B (en) * | 2018-07-06 | 2021-01-29 | 京东方科技集团股份有限公司 | Gate drive circuit, drive method thereof and display device |
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