CN101625488B - Display device and method for driving display panel thereof - Google Patents
Display device and method for driving display panel thereof Download PDFInfo
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- CN101625488B CN101625488B CN200810135686XA CN200810135686A CN101625488B CN 101625488 B CN101625488 B CN 101625488B CN 200810135686X A CN200810135686X A CN 200810135686XA CN 200810135686 A CN200810135686 A CN 200810135686A CN 101625488 B CN101625488 B CN 101625488B
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Abstract
The invention relates to a display device and a method for driving a display panel thereof. The display device comprises a display panel and a grid electrode driver, wherein the display panel comprises N grid electrode lines, and the N is a positive integer. The grid electrode lines are used for transmitting grid electrode pulse to the grid electrodes of film transistors positioned on the grid electrode lines. The grid electrode driver sequentially generates the grid electrode pulses of grid electrode lines from the first to the Nth at each specific interval time and sequentially generates the grid electrode pulses of grid electrode lines from the first to the Nth again by taking the grid electrode pulse of the Nth grid electrode line as a reference at intervals of frame interval time, wherein the ratio of the frame interval time and the specific interval time is between 0.7 and 1.3.
Description
[technical field]
The present invention relates to the driving method of a kind of display device and display panel thereof, and be particularly related to the driving method of uniform display device of a kind of induction sensitivity and display panel thereof.
[background technology]
In all kinds of input panel products, the input panel that generally adds the sensing film also can reduce about 20% penetration except meeting increases extra cost.And embedded input panel be utilize the characteristic design of amorphous silicon (Amorphous-Si) can sensing the sensor circuit of touching, and sensor circuit is incorporated in the thin film transistor (TFT) array processing procedure of LCD.In comparison, embedded input panel has low cost and better optical characteristics, therefore replaces the input panel that adds the sensing film gradually.
Figure 1A is depicted as the circuit structure diagram of the conventional display device with embedded input panel.Conventional display device 100 comprises an embedded display panel 110, a gate drivers 120 and a signal processing circuit 130, and embedded display panel 110 comprises and is coupled to gate lines G L
11～GL
1NWith signal read line RL
11～RL
1MA plurality of sensor circuits, such as sensor circuit 111～113, and each sensor circuit all can be coupled to a gate line and a bars read line.
Figure 1B is depicted as the drive waveforms sequential chart of conventional display device 100, and wherein VR is the induced signal on the induction signal reading line, SG
11～～SG
1NThe signal that is produced for gate drivers 120.Please be simultaneously with reference to Figure 1A and Figure 1B, gate drivers 120 can be exported grid impulse PU in regular turn in a picture cycle
11～PU
1NSensor circuit in the embedded display panel 110 is then according to grid impulse PU
11～PU
1NAnd be activated in regular turn, produce corresponding induced signal with the touch point of the embedded display panel 110 of sensing.For example, when embedded display panel 110 was under normal circumstances touched, then induced signal VR can present the waveform shown in Reference numeral 141 and 142.On the other hand, whether signal processing circuit 130 will to differentiate the touch point of embedded display panel 110 according to induced signal touched.
It should be noted that between two adjacent picture cycles embedded display panel 110 has and can't receive any grid impulse a blink, be interregnum (blanking time) T this blink
BAt interregnum T
BIn, because signal SG
11～SG
1NAll present electronegative potential, so the level of induced signal VR can descend, and when next picture begins, be pulled up to normal level gradually.Yet, induced signal VR be pulled up to normal level during in, if embedded display panel 110 is touched again, induced signal VR can present the waveform shown in Reference numeral 143 and 144.At this moment, signal processing circuit 130 can't correctly determine the level of induced signal VR, and then reduce the resolution of the uppermost component of embedded display panel 110.
In order to address the above problem, Fig. 1 C and Fig. 1 D are shown as another drive waveforms sequential chart of conventional display device 100.In Fig. 1 C, this driving method is with grid impulse PU
1NAcross the interregnum T between the two adjacent picture cycles
BThus, induced signal VR is at interregnum T
BIn can still maintain normal level.Yet, though this driving method can improve the uneven situation of the sensitivity of input panel, along with grid impulse PU
1NThe change of width big, the circuit structure of conventional display device 100 will be more complicated also.
On the other hand, in Fig. 1 C, this driving method is that polygamy is put a gate line and transmitted signal SG in embedded display panel 110
1 (N+1)Thus, embedded display panel 110 can be at interregnum T
BIn, receive signal SG
1 (N+1)In grid impulse PU
1 (N+1), maintain normal level to cause induced signal VR.Yet this driving method has not only increased the circuit complexity of conventional display device 100, has also increased the layout area of embedded display panel 110.
[summary of the invention]
The invention provides a kind of display device, in order to the resolution of the uppermost component that promotes display panel.
The invention provides a kind of driving method of display panel, in order to promote the induction sensitivity of display panel.
The present invention proposes a kind of display device, comprises display panel and gate drivers.Display panel comprises N bar gate line, and wherein i bar gate line is in order to transmit i grid impulse, and i and N are positive integer and 1≤i≤N.Gate drivers then produces the 1st to N grid impulse in regular turn with the specific interval time, and be that the benchmark picture interval of being separated by produces the 1st to N grid impulse once more after the time with N grid impulse, wherein the ratio of picture interval time and specific interval time is between 0.7 to 1.3.
In one embodiment of this invention, the time between the high state switching points of above-mentioned two adjacent grid impulses is the specific interval time, and the time between two adjacent N and the 1st its high state switching points of grid impulse is the picture interval time.In addition, the 1st to the width of N grid impulse between 6.7 microsecond to 71.4 microseconds.
In one embodiment of this invention, above-mentioned display panel also comprises many barss read line.Wherein, described signal read line and described gate line are interconnected, and in order to transmit induced signal.In addition, sensor circuit is configured in the staggered part of gate line and signal read line, and is electrically connected to corresponding gate line and signal read line.
In one embodiment of this invention, above-mentioned display device also comprises signal processing circuit.Wherein, this signal processing circuit is coupled to described signal read line, and whether differentiate the touch point of display panel in order to the foundation induced signal touched.
From another angle, the present invention proposes a kind of driving method of display panel, is applicable to the display panel that comprises a plurality of sensor circuits, and comprises the following steps: that (a) produces the 1st to N grid impulse in regular turn with the specific interval time; (b) utilize the 1st to N grid impulse to start described sensor circuit, produce a plurality of induced signals with the touch point of sensing display panel; And (c) be that benchmark is separated by a picture interval after the time with N grid impulse, repeating step (a) with (b).Wherein, the ratio of picture interval time and specific interval time is between 0.7 to 1.3, and N is a positive integer.
In one embodiment of this invention, the time between the high state switching points of above-mentioned two adjacent grid impulses is the specific interval time, and the time between the high state switching points of two adjacent N and the 1st grid impulse is the picture interval time.In addition, the 1st to the width of N grid impulse between 6.7 microsecond to 71.4 microseconds.
In sum, the present invention is set in the ratio of picture interval time and specific interval time between 0.7 to 1.3.Thus, when display panel is not touched as yet, the induced signal that signal read line transmitted will maintain a particular level.Relatively, the induction sensitivity of the uppermost component of display panel just can not descend, and then promotes the induction sensitivity of display panel.In addition, because the width of each grid impulse is all identical, and the present invention need not to dispose extra gate line, so the present invention can reduce the circuit complexity and the layout area of display device effectively.
For above-mentioned feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
[description of drawings]
Figure 1A is depicted as the circuit structure diagram of the conventional display device with embedded input panel;
Figure 1B is depicted as the drive waveforms sequential chart of conventional display device;
Fig. 1 C is depicted as another drive waveforms sequential chart of conventional display device;
Fig. 1 D is depicted as the another drive waveforms sequential chart of conventional display device;
Fig. 2 is depicted as the circuit structure diagram of display device according to an embodiment of the invention;
Fig. 3 is depicted as the drive waveforms sequential chart of display device according to an embodiment of the invention; And
Fig. 4 is depicted as the driving method process flow diagram of display panel according to an embodiment of the invention.
[embodiment]
Fig. 2 is depicted as the circuit structure diagram of display device according to an embodiment of the invention.Please refer to Fig. 2, display device 200 comprises a display panel 210, a gate drivers 220, a signal processing circuit 230 and one source pole driver 240.In addition, display panel 210 comprises N bar gate lines G L
1～GL
N, a plurality of sensor circuits and many barss read line RL
1～RL
MWherein, described sensor circuit for example is the sensor circuit 211～213 among Fig. 2, and N is a positive integer.
Please continue with reference to Fig. 2 signal read line RL
1～RL
MWith gate lines G L
1～GL
NInterconnected.Sensor circuit in the display panel 210 is configured in gate lines G L
1～GL
NWith signal read line RL
1～RL
MStaggered part, and be electrically connected to corresponding gate line and signal read line.For instance, sensor circuit 211 is configured in gate lines G L
1With signal read line RL
MStaggered part, and be electrically connected to its pairing gate lines G L
1With signal read line RL
MMoreover gate drivers 220 is coupled to gate lines G L
1～GL
N Signal processing circuit 230 is coupled to signal read line RL
1～RL
M Source electrode driver 240 is coupled to display panel 210.
What deserves to be mentioned is that the configuration mode of sensor circuit can be provided with according to the arrangement mode of pixel (not shown) in the display panel 210, so the present embodiment sensor circuit of each pixel all can being arranged in pairs or groups.Yet those skilled in the art also can adjust the corresponding relation of pixel and sensor circuit according to the resolution of display panel.In addition, in the present embodiment, display panel 210 is embedded input panel, and sensor circuit then can utilize electric charge formula sensor circuit or current type sensor circuit to be realized.
Fig. 3 is depicted as the drive waveforms sequential chart of display device according to an embodiment of the invention, and wherein VR3 is the induced signal on the induction signal reading line, SG
1～SG
NThe signal that is produced for gate drivers 220.Please be simultaneously with reference to Fig. 2 and Fig. 3, gate drivers 220 can be exported grid impulse PU in regular turn in a picture cycle
1～PU
N, and by gate lines G L
1～GL
NBe sent to display panel 210.At this, gate lines G L
1In order to transmit grid impulse PU
1, gate lines G L
2In order to transmit grid impulse PU
2, by that analogy, i bar gate lines G L
iIn order to transmit i grid impulse PU
i, i is positive integer and 1≤i≤N.
On the other hand, source electrode driver 240 can be according to the sequential control of gate drivers 220 and data signal to display panel 210.Thus, the pixel in the display panel 210 will be driven in a picture cycle in regular turn.In addition, the sensor circuit in the display panel 210 also can be according to grid impulse PU
11～PU
1NAnd be activated in regular turn, produce a plurality of induced signals with the touch point of sensing display panel 210.Afterwards, whether signal processing circuit 230 will to differentiate the touch point of display panel 210 according to described induced signal touched.
It should be noted that gate drivers 220 can be with a specific interval time T in a picture cycle
iProduce grid impulse PU in regular turn
1～PU
N, and with grid impulse PU
NBe the benchmark picture interval time T of being separated by
jAfter, produce the grid impulse PU in the next picture cycle again
1～PU
NWherein, picture interval time T
jWith the specific interval time T
iRatio between 0.7 to 1.3, and grid impulse PU
1～PU
NWidth W all identical, and can be between 6.7 microsecond to 71.4 microseconds.
When display panel 210 is not touched in a picture cycle as yet, induced signal VR3 will maintain a particular level.Relatively, when display panel 210 was touched in a picture cycle, then induced signal VR3 can present the waveform shown in Reference numeral 341 and 342.
In addition, because the picture interval time T
jWith the specific interval time T
iRatio can be between 0.7 to 1.3, when display panel 210 was not touched between two adjacent picture cycles as yet, induced signal VR3 still can maintain a particular level.Relatively, when display panel 210 was touched at the initial stage of each picture cycle, induced signal VR3 can present the waveform shown in Reference numeral 343 and 344.
Hence one can see that, because induced signal VR3 maintains a comparatively stable particular level always, thereby the identification accuracy can not influence initial several gate lines and open the time.Thus, the induction sensitivity of the uppermost component of display panel 210 just can not descend, and makes that the induction sensitivity of panel integral body is more even.In addition, present embodiment need not be provided with extra gate line, and the width W of each grid impulse is also all identical, so can reduce the circuit complexity and the layout area of display device 200 effectively.
What deserves to be mentioned is that present embodiment is with the specific interval time T
iBe set at the time between the high state switching points of two adjacent grid impulses, and with the picture interval time T
jBe set at two N adjacent grid impulse PU
NWith the 1st grid impulse PU
1High state switching points between time.Yet those skilled in the art can be also with the specific interval time T
iBe set at the time between the low state switching points of two adjacent grid impulses, and with the picture interval time T
jBe set at two N adjacent grid impulse PU
NWith the 1st grid impulse PU
1Low state switching points between time.
Fig. 4 is depicted as the driving method process flow diagram of display panel according to an embodiment of the invention, and wherein this driving method is applicable to the display panel that comprises a plurality of sensor circuits.In step S401, produce the 1st to N grid impulse in regular turn with a specific interval time, wherein N is a positive integer.Afterwards, in step S402, utilize the 1st to N grid impulse to start a plurality of sensor circuits, produce a plurality of induced signals with the touch point of sensing display panel.Then, in step S403, be benchmark with N grid impulse, be separated by a picture interval after the time, repeating step S401 and S402.
Ratio that it should be noted that picture interval time and specific interval time is between 0.7 to 1.3, and each grid impulse width is all identical and can be between 6.7 microsecond to 71.4 microseconds.In addition, the above-mentioned specific interval time can be the time between the high state switching points of two adjacent grid impulses, or the time between the low state switching points of two adjacent grid impulses.And the above-mentioned picture interval time can be the time between the high state switching points of two adjacent N and the 1st grid impulse, also can be the time between the low state switching points of adjacent N and the 1st grid impulse.All the other details as for this driving method comprise in the above-described embodiments, so do not add tired stating at this.
In sum, the present invention is set in the ratio of picture interval time and specific interval time between 0.7 to 1.3.Thus, when display panel is not touched as yet, the induced signal that signal read line transmitted will maintain a particular level.Relatively, the induction sensitivity of the uppermost component of display panel just can not descend, and then promotes the induction sensitivity of display panel.In addition, because the width of each grid impulse is all identical, and the present invention need not to dispose extra gate line, so the present invention can reduce the circuit complexity and the layout area of display device effectively.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any those of ordinary skills without departing from the spirit and scope of the present invention; when can doing a little change and retouching, thus protection scope of the present invention when with accompanying claims the person of being defined be as the criterion.
Claims (20)
1. display device comprises:
Display panel comprises:
A plurality of sensor circuits and N bar gate line, wherein i bar gate line is in order to transmit i grid impulse, and i and N are positive integer and 1≤i≤N;
Gate drivers, be coupled to these gate lines, produce the 1st to N grid impulse in regular turn with the specific interval time, and be that the benchmark picture interval of being separated by produces the 1st to N grid impulse once more after the time with N grid impulse, wherein the ratio of this picture interval time and this specific interval time is between 0.7 to 1.3; The described the 1st to N grid impulse is used to start these sensor circuits, produces a plurality of induced signals with the touch point of this display panel of sensing;
Wherein, the described specific interval time is interlude between the two adjacent grid impulses in the described the 1st to N the grid impulse.
2. display device as claimed in claim 1, wherein the time between the high state switching points of two adjacent grid impulses is this specific interval time.
3. display device as claimed in claim 2, wherein the time between the high state switching points of two adjacent N and the 1st grid impulse is this picture interval time.
4. display device as claimed in claim 1, wherein the time between the low state switching points of two adjacent grid impulses is this specific interval time.
5. display device as claimed in claim 4, wherein the time between the low state switching points of two adjacent N and the 1st grid impulse is this picture interval time.
6. display device as claimed in claim 1, wherein the 1st to the width of N grid impulse between 6.7 microsecond to 71.4 microseconds.
7. display device as claimed in claim 1, wherein this display panel also comprises:
Many barss read line, interconnected with these gate lines, and in order to transmit these induced signals, wherein, each sensor circuit is configured in the staggered part of these gate lines and these signal read lines, and is electrically connected to corresponding a gate line and a signal read line.
8. display device as claimed in claim 7 also comprises:
Whether signal processing circuit is coupled to these signal read lines, touched in order to the touch point of differentiating this display panel according to these induced signals.
9. display device as claimed in claim 1, wherein these sensor circuits are to realize with electric charge formula sensor circuit or current type sensor circuit.
10. display device as claimed in claim 1, wherein this display panel is embedded input panel.
11. the driving method of a display panel is applicable to the display panel that comprises a plurality of sensor circuits, the driving method of this display panel comprises the following steps:
(a) produce the 1st to N grid impulse in regular turn with the specific interval time, wherein N is a positive integer; Wherein, the described specific interval time is interlude between the two adjacent grid impulses in the described the 1st to N the grid impulse;
(b) utilize the 1st to N grid impulse to start these sensor circuits, produce a plurality of induced signals with the touch point of this display panel of sensing; And
(c) be that benchmark is separated by a picture interval after the time with N grid impulse, repeating step (a) with (b), wherein the ratio of this picture interval time and this specific interval time is between 0.7 to 1.3.
12. the driving method of display panel as claimed in claim 11, wherein the time between the high state switching points of two adjacent grid impulses is this specific interval time.
13. the driving method of display panel as claimed in claim 12, wherein the time between the high state switching points of two adjacent N and the 1st grid impulse is this picture interval time.
14. the driving method of display panel as claimed in claim 11, wherein the time between the low state switching points of two adjacent grid impulses is this specific interval time.
15. the driving method of display panel as claimed in claim 14, wherein the time between the low state switching points of two adjacent N and the 1st grid impulse is this picture interval time.
16. the driving method of display panel as claimed in claim 11, wherein the 1st to the width of N grid impulse between 6.7 microsecond to 71.4 microseconds.
17. the driving method of display panel as claimed in claim 11 also comprises:
Whether the touch point of differentiating this display panel according to these induced signals is touched.
18. the driving method of display panel as claimed in claim 11 also comprises:
Transmit these grid impulses by N bar gate line, wherein i bar gate line is in order to transmit i grid impulse, and i is integer and 1≤i≤N; And
Transmit these induced signals by many barss read line, wherein these gate lines and these signal read lines are interconnected, are electrically connected to corresponding a gate line and a signal read line to cause each sensor circuit.
19. the driving method of display panel as claimed in claim 11, wherein these sensor circuits are to realize with electric charge formula sensor circuit or current type sensor circuit.
20. the driving method of display panel as claimed in claim 11, wherein this display panel is embedded input panel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810135686XA CN101625488B (en) | 2008-07-09 | 2008-07-09 | Display device and method for driving display panel thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810135686XA CN101625488B (en) | 2008-07-09 | 2008-07-09 | Display device and method for driving display panel thereof |
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| CN101625488A CN101625488A (en) | 2010-01-13 |
| CN101625488B true CN101625488B (en) | 2011-09-28 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102314247B (en) * | 2010-06-29 | 2013-12-11 | 瀚宇彩晶股份有限公司 | Touch panel |
| US9875707B2 (en) * | 2015-05-11 | 2018-01-23 | Novatek Microelectronics Corp. | Display apparatus and gate driving method thereof |
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| US5159323A (en) * | 1987-02-19 | 1992-10-27 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display |
| US5610629A (en) * | 1991-12-06 | 1997-03-11 | Ncr Corporation | Pen input to liquid crystal display |
| US5838308A (en) * | 1991-04-17 | 1998-11-17 | U.S. Philips Corporation | Optical touch input device |
| CN1567418A (en) * | 2003-06-11 | 2005-01-19 | 瀚宇彩晶股份有限公司 | Display mode with black picture inserted and apparatus thereof |
| CN1768367A (en) * | 2003-04-07 | 2006-05-03 | 皇家飞利浦电子股份有限公司 | Display device |
| CN101017419A (en) * | 2005-06-30 | 2007-08-15 | 深圳市联思精密机器有限公司 | Touch control panel display |
| CN101149654A (en) * | 2006-09-22 | 2008-03-26 | 陈其良 | Touch control type active panel display screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5159323A (en) * | 1987-02-19 | 1992-10-27 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display |
| US5838308A (en) * | 1991-04-17 | 1998-11-17 | U.S. Philips Corporation | Optical touch input device |
| US5610629A (en) * | 1991-12-06 | 1997-03-11 | Ncr Corporation | Pen input to liquid crystal display |
| CN1768367A (en) * | 2003-04-07 | 2006-05-03 | 皇家飞利浦电子股份有限公司 | Display device |
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| CN101149654A (en) * | 2006-09-22 | 2008-03-26 | 陈其良 | Touch control type active panel display screen |
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| CN101625488A (en) | 2010-01-13 |
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