CN101430853A - Driving method for display panel with semi-source pole driving structure - Google Patents
Driving method for display panel with semi-source pole driving structure Download PDFInfo
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- CN101430853A CN101430853A CNA2008101843663A CN200810184366A CN101430853A CN 101430853 A CN101430853 A CN 101430853A CN A2008101843663 A CNA2008101843663 A CN A2008101843663A CN 200810184366 A CN200810184366 A CN 200810184366A CN 101430853 A CN101430853 A CN 101430853A
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Abstract
The invention provides a driving method of a display panel provided with a half-source drive framework; wherein, the display panel is provided with at least a picture element using a capacitor to store voltage; one terminal of the capacitor receives display data input by a data line; and the other terminal of the capacitor is electrically coupled to a common electrode. The driving method comprises the following steps: a DC input power source is acquired; an AC signal is used to be coupled with the DC input power source, so as to produce a common electrode driving signal; and the common electrode driving signal is provided to the common electrode, wherein, rising time occupied by the rising edge of the common electrode driving signal and falling time occupied by the falling edge of the common electrode driving signal are adjusted, so as to improve a vertical stripe phenomenon of the display panel. The driving method causes the rising time occupied by the rising edge of the common electrode driving signal and the falling time occupied by the falling edge of the common electrode driving signal to be changed, thereby improving the vertical stripe phenomenon of the display panel.
Description
Technical field
The present invention relates to the flat-panel screens field, and be particularly related to a kind of driving method with display panel of semi-source pole driving architecture.
Background technology
Flat-panel screens, for example LCD, plasma scope etc., have high image quality arranged, advantage such as volume is little, in light weight and applied range, therefore be widely used in consumption electronic products such as mobile phone, notebook, console display and TV, and replaced traditional cathode-ray tube display gradually and become the main flow of display.
Referring to Fig. 1, it is a kind of partial circuit diagram with display panel 10 of semi-source pole driving architecture of the prior art.Display panel 10 comprises many data lines (Data line) S1～S3, many gate line (Gateline) G1～G10 and a plurality of pixel, and having respectively along the gate line direction has different color (RGB).Wherein, each odd column (Odd Column) pixel in each pixel column (Pixel Row) and an even column (Even Column) pixel that is adjacent are connected to same data line, but this odd column pixel is connected to two different gate lines with the even column pixel.Illustrate, first row pixel R in each pixel column and the secondary series pixel G that is adjacent all are connected to data line S1, but the first row pixel R is connected to two different gate lines G 1, G2 with secondary series pixel G system.
Hold above-mentionedly, each pixel uses a memory capacitance Cs with storage voltage, and the termination of memory capacitance Cs is received the video data by the data line input, and the other end is electrically coupled to community electrode Vcom; And put on a common electrode drive signal VCOM1 square-wave signal normally on the common electrode Vcom, as shown in Figure 3.Referring to Fig. 2, square-wave signal VCOM1 can produce by AC signal AC1 stream and direct-current input power supplying DC coupling, and AC signal AC1 can obtain via square-wave signal (not indicating among the figure) capacitor C of flowing through 1 back of capacitor C 1 input end input.At this, AC signal AC1 has with common electrode drive signal VCOM1 identical waveform is arranged, and has just lacked DC component DC with respect to common electrode drive signal VCOM1.
In the procedure for displaying of the display panel 10 with semi-source pole driving architecture, gate lines G 1～G10 opens in regular turn, each data line S1～S3 to each pixel column of its electric property coupling in adjacent two pixels successively import opposite polarity video data; At this, can there be a stray capacitance (Parasitic Capacitance) between these two neighbors.Because the influence of this type of stray capacitance, the memory capacitance Cs stored voltage that formerly is transfused in the pixel of video data will modulated when one other pixel is transfused to video data (Modulated), there are differences between final stored voltage of memory capacitance Cs in the feasible pixel that is recharged earlier and former the design's the voltage, and then cause display panel 10 to produce perpendicular line striped (V-lineMura) phenomenons.
Summary of the invention
One of purpose of the present invention just provides a kind of driving method with display panel of semi-source pole driving architecture, to improve the perpendicular line striped phenomenon of display panel.
One embodiment of the invention proposes a kind of driving method with display panel of semi-source pole driving architecture; Wherein, display panel has at least one pixel, and pixel uses an electric capacity with storage voltage, and a termination of electric capacity is received the video data by data line input, and the other end is electrically coupled to community electrode.This driving method comprises: obtain a direct-current input power supplying; Use AC signal coupling direct-current input power supplying to produce the community electrode drive signal; And provide the common electrode drive signal to common electrode.Wherein, the shared decline time of rise time that the rising edge of common electrode drive signal is shared and negative edge is adjusted, to improve the perpendicular line striped phenomenon of display panel whereby.
In an embodiment of the present invention, the adjustment of the waveform of above-mentioned common electrode drive signal is reached by the waveform of adjusting AC signal.
In an embodiment of the present invention, above-mentioned AC signal comprises the stepped waveform with the step-wise manner rise and fall.
In an embodiment of the present invention, at least one rising edge of above-mentioned AC signal uses two or more different ascending velocity, and the ascending velocity of the ascending velocity before relatively is slow.
In an embodiment of the present invention, at least one negative edge of above-mentioned AC signal uses two or more different decline rates, and the decline rate of the decline rate before relatively is slow.
In an embodiment of the present invention, above-mentioned driving method also comprises step: a square-wave signal is provided; And adjust square-wave signal and AC signal.Wherein, the rise time of AC signal is longer than corresponding rise time and fall time in the square wave signal with fall time.
In an embodiment of the present invention, above-mentioned adjustment square-wave signal and the step of AC signal comprises: receive square-wave signal; And square-wave signal is transmitted by a signal transmission line, the resistance of signal transmission line is set to and can reaches the effect of adjusting square-wave signal and getting AC signal.
In an embodiment of the present invention, the resistance of above-mentioned signal transmission line is set to fixed value.
In an embodiment of the present invention, the resistance of above-mentioned signal transmission line is set to and can adjusts in a setting range.
In an embodiment of the present invention, the set basis Y=a*X+d of the resistance of above-mentioned signal transmission line and getting, Y is to be the rise time or the fall time of unit with the microsecond, and X is to be the resistance of the signal transmission line of unit with ohm, 0.015＜a＜0.12 and 0.01＜d＜12.
In an embodiment of the present invention, the adjustment of the waveform of above-mentioned common electrode drive signal is to reach by the resistance of adjusting a signal transmission line that transmits the common electrode drive signal.
Another embodiment of the present invention proposes another kind of driving method with display panel of semi-source pole driving architecture; Wherein, display panel has at least one pixel, and pixel uses an electric capacity with storage voltage, and a termination of electric capacity is received the video data by data line input, and the other end is electrically coupled to community electrode.This driving method comprises step: adjustment provides to a rise time of the rising edge of the community electrode drive signal of common electrode and a decline time of negative edge, to improve the perpendicular line striped phenomenon of display panel.
Further embodiment of this invention proposes another kind of driving method with display panel of semi-source pole driving architecture; Wherein, display panel has at least one pixel, and pixel uses an electric capacity with storage voltage, and a termination of electric capacity is received the video data by data line input, and the other end is electrically coupled to community electrode.This driving method comprises step: obtain a direct-current input power supplying; The square-wave signal coupling direct-current input power supplying that uses a distortion is to produce the community electrode drive signal; And provide the common electrode drive signal to common electrode.Further, the square-wave signal of this distortion can be the square-wave signal of a rescinded angle square-wave signal, a fillet square-wave signal, a stepped square-wave signal or other distortion.
The embodiment of the invention provides to the drive waveforms of the common electrode drive signal of common electrode by adjustment, make that the shared decline time of rise time that the rising edge of common electrode drive signal is shared and negative edge is changed, and then can improve the perpendicular line striped phenomenon of display panel.
For above-mentioned and other purposes, 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
Fig. 1 is a kind of partial circuit diagram with display panel of semi-source pole driving architecture of the prior art.
Fig. 2 is a kind of common electrode driving signal generating method of the prior art.
Fig. 3 is the waveform enlarged drawing of the common electrode drive signal among Fig. 2.
Fig. 4 is a kind of common electrode driving signal generating method of the embodiment of the invention.
Fig. 5 is the waveform enlarged drawing of the AC signal among Fig. 4.
Fig. 6 is the waveform enlarged drawing of the another kind of AC signal of the embodiment of the invention.
Fig. 7 is the rise time of rising edge of common electrode drive signal of a plurality of display panels and the relation curve of resistance.
Fig. 8 is the another kind of common electrode driving signal generating method of the embodiment of the invention.
Fig. 9 is the waveform enlarged drawing of the another kind of AC signal of the embodiment of the invention.
Description of reference numerals in the above-mentioned accompanying drawing is as follows:
10: display panel with semi-source pole driving architecture
S1～S3: data line
G1～G10: gate line
Cs: memory capacitance
Vcom: common electrode
C1: electric capacity
DC: direct-current input power supplying
AC1, AC2: AC signal
VCOM1, VCOM2: common electrode drive signal
R1: resistance
VR1: variable resistor
Tr: rise time
Tf: fall time
Δ V: voltage difference
Embodiment
One embodiment of the invention provides a kind of driving method with display panel of semi-source pole driving architecture.Wherein, display panel (can with reference to figure 1) has a plurality of pixels, and each pixel uses a memory capacitance with storage voltage, and a termination of electric capacity is received the video data by data line input, and the other end is electrically coupled to community electrode.
Referring to Fig. 4 and Fig. 5, the driving method that present embodiment provides comprises the following steps (1)～(3):
(1) obtains a direct-current input power supplying DC.
(2) use AC signal AC2 coupling direct-current input power supplying DC to produce community electrode drive signal VCOM2, Fig. 5 is the waveform of AC signal AC2, it is a rescinded angle (corner-cut) square-wave signal, the shared rise time of the rising edge of AC signal AC2 (also is that voltage is changed to the required time of high level from low level, wherein, the voltage difference of low level and high level is Δ V) for tr, negative edge shared fall time (also being that voltage is changed to the required time of low level from high level) is tf.Be understandable that owing to common electrode drive signal VCOM2 is produced by AC signal AC2 coupling direct-current input power supplying DC, so common electrode drive signal VCOM2 has identical waveform with AC signal AC2, just increased DC component DC.
Comparison diagram 5 and Fig. 3 as can be known, common electrode drive signal VCOM2 is (Deformed) square-wave signal of a distortion with respect to the common electrode drive signal VCOM1 among Fig. 3.Particularly, the shared decline time (equaling shared tf fall time of negative edge of AC signal AC) of rise time (equaling the shared rise time tr of rising edge of AC signal AC) that the rising edge of common electrode drive signal VCOM2 is shared and negative edge is adjusted, so that the perpendicular line striped phenomenon of display panel is improved.
Wherein, the adjustment of the waveform of common electrode drive signal VCOM2 is reached by the waveform of adjusting AC signal AC2.Particularly, the waveform set-up procedure of AC signal AC2 comprises: provide a square-wave signal, as shown in Figure 4; And make square-wave signal obtain AC signal AC2 by a signal transmission line transmission.This signal transmission line comprises capacitor C 1 and resistance R 1, and square-wave signal is received by the input end of capacitor C 1, the resistance R 1 of signal transmission line be set to can reach adjust square-wave signal and AC signal AC2 effect and be a fixed value.Because AC signal AC2 is a rescinded angle square-wave signal, its rise time tr with fall time tf all be increased, also promptly long than corresponding rise time and fall time in the square-wave signal of reception.
(3) provide common electrode drive signal VCOM2 to common electrode, can be with reference to the Vcom among the figure 1, and then can improve the perpendicular line striped phenomenon of display panel.
Moreover the AC signal AC2 of the above embodiment of the present invention is not limited to rescinded angle square-wave signal shown in Figure 5, also can be the square-wave signal of other distortion, fillet for example shown in Figure 6 (Rounded-corner) square-wave signal.Wherein, the value of the resistance R 1 that fillet square-wave signal shown in Figure 6 can be by setting the signal transmission line among Fig. 4 realizes.
Adjust the situation of AC signal AC2 for the value of the resistance R 1 of utilizing the setting signal transmission line among the above embodiment, Fig. 7 is the experimental result of the relation curve of the rise time of the common electrode drive signal VCOM2 that does at a plurality of different display panels and resistance R 1 value.The rise time of the common electrode drive signal VCOM2 that the intercept d of each relation curve on the longitudinal axis exported when resistance R 1 is not set among Fig. 7.By each relation curve among Fig. 7 is made simple linear fit, can obtain linear equation: Y=a*X+d; Wherein, Y is to be the rise time of unit with microsecond (μ s), and X is to be the resistance value of the signal transmission line of unit with ohm (Ω), 0.015＜a＜0.12 and 0.01＜d＜12 μ s.Like this, when the value of resistance R 1 satisfies this kind linear equation, can make the waveform of AC signal AC2 be adjusted to a predetermined form, thereby can reach the purpose of the perpendicular line striped phenomenon of improving display panel.Can learn that from Fig. 5 and Fig. 6 the negative edge of common electrode drive signal VCOM2 has to rising edge similar waveform is arranged, so the value of the fall time of common electrode drive signal VCOM2 and resistance R 1 satisfies above-mentioned linear equation Y=a*X+d equally.
In addition, the also variable variable resistor VR1 more shown in Figure 8 of the resistance R 1 of the signal transmission line among Fig. 4, thereby the resistance value of signal transmission line can be adjusted in a setting range, and the waveform of AC signal AC2 can be adjusted to predetermined kenel equally, and then can reach the purpose of the perpendicular line striped phenomenon of improving display panel.
Need to prove, AC signal AC2 is not limited to above-mentioned utilize signal transmission line to transmit square-wave signal and obtain, also can not adopt Fig. 4 and the signal transmission line that comprises capacitor C 1 and resistance R 1 (or VR1) shown in Figure 8, but utilize a signal source that as shown in Figure 5 rescinded angle square-wave signal, fillet square-wave signal shown in Figure 6, stepped square-wave signal shown in Figure 9 or the square-wave signal of other distortion directly are provided.More specifically, the rising edge of the rescinded angle square-wave signal among Fig. 5 uses two kinds of different ascending velocity (corresponding two different straight slopes), and the ascending velocity of the ascending velocity before relatively is slow; Negative edge also is to use two kinds of different decline rates, and the decline rate of the decline rate before relatively is slow.Fillet square-wave signal among Fig. 6 then can be regarded its rising edge as and use multiple different ascending velocity (corresponding a plurality of different tangent slopes), and the ascending velocity of the ascending velocity before relatively is slow; Negative edge also is to use multiple different decline rate, and the decline rate of the decline rate before relatively is slow.As for the stepped square-wave signal among Fig. 9, it comprises the stepped waveform with the step-wise manner rise and fall.
In another embodiment of the present invention, the adjustment of the waveform of common electrode drive signal VCOM2 is adjusted the resistance of a signal transmission line of transmission common electrode drive signal and is reached, but not reach as the above-mentioned waveform that passes through adjustment AC signal AC2.
Particularly, before the common electrode drive signal was not flowed through the controlled signal transmission line of this resistance, the waveform of common electrode drive signal VCOM2 can be square-wave waveform shown in Figure 3; And after this common electrode drive signal VCOM2 flowed through the controlled signal transmission line of resistance, its waveform then can be adjusted to square wave, rescinded angle square wave for example shown in Figure 5 or the fillet square wave shown in Figure 6 of a distortion.Wherein, after the resistance of signal transmission line was adjusted, its resistance value then can satisfy linear equation: Y=a*X+d equally; Wherein, Y is to be the rise time of unit with microsecond (μ s), and X is to be the resistance value of the signal transmission line of unit with ohm (Ω), 0.015＜a＜0.12 and 0.01＜d＜12.In addition, resistance adjustment for the signal transmission line that transmits common electrode drive signal VCOM2, then can for example be that transmission line with common electrode drive signal VCOM2 on the substrate changes to snakelike (Snake-like shape) and increases its length, one suitable line impedence is provided or the transmission lines in the plurality of transmission lines is cut off (Cut-off) or when the design, uses the less transmission line of live width to realize.
In sum, the embodiment of the invention provides to the drive waveforms of the common electrode drive signal of common electrode by adjustment, make that the shared decline time of rise time that the rising edge of common electrode drive signal is shared and negative edge is changed, and then can improve the perpendicular line striped phenomenon of display panel.
Though the present invention with preferred embodiment openly as above; right its is not in order to limit the present invention; any those of ordinary skill in the art; without departing from the spirit and scope of the present invention; when can doing a little change, so protection scope of the present invention is as the criterion when looking appended the scope that claim defined.
Claims (23)
1. driving method with display panel of semi-source pole driving architecture, wherein this display panel has at least one pixel, this pixel uses an electric capacity with storage voltage, one termination of this electric capacity is received the video data by data line input, the other end is electrically coupled to community electrode, and this driving method comprises:
Obtain a direct-current input power supplying;
Use an AC signal to be coupled this direct-current input power supplying to produce the community electrode drive signal; And
Provide this common electrode drive signal to this common electrode, wherein, the shared decline time of rise time that the rising edge of this common electrode drive signal is shared and negative edge is adjusted, to improve the perpendicular line striped phenomenon of this display panel whereby.
2. driving method as claimed in claim 1, wherein the adjustment of the waveform of this common electrode drive signal is reached by the waveform of adjusting this AC signal.
3. driving method as claimed in claim 2 also comprises the following steps:
One square-wave signal is provided; And
Adjust this square-wave signal and must this AC signal, wherein, this rise time of this AC signal and this fall time than in this square-wave signal corresponding should the rise time and this fall time long.
4. driving method as claimed in claim 3, wherein adjust this square-wave signal and step that must this AC signal comprises:
Receive this square-wave signal; And
This square-wave signal is transmitted by a signal transmission line, and the resistance of this signal transmission line is set to and can reaches the effect of adjusting this square-wave signal and must this AC signal.
5. driving method as claimed in claim 4, wherein the resistance of this signal transmission line is set to fixed value.
6. driving method as claimed in claim 4, wherein the resistance of this signal transmission line is set to and can adjusts in a setting range.
7. driving method as claimed in claim 4, wherein the setting of the resistance of this signal transmission line is to get according to Y=a*X+d, Y for the microsecond be unit this rise time or should fall time, X is for being the resistance of this signal transmission line of unit with ohm, 0.015＜a＜0.12 and 0.01＜d＜12.
8. driving method as claimed in claim 2, wherein this AC signal comprises the stepped waveform with the step-wise manner rise and fall.
9. driving method as claimed in claim 2, wherein at least one rising edge of this AC signal uses two or more different ascending velocity, and the ascending velocity of the ascending velocity before relatively is slow.
10. driving method as claimed in claim 2, wherein at least one negative edge of this AC signal uses two or more different decline rates, and the decline rate of the decline rate before relatively is slow.
11. driving method as claimed in claim 1, wherein the adjustment of the waveform of this common electrode drive signal is to reach by the resistance of adjusting a signal transmission line that transmits this common electrode drive signal.
12. driving method with display panel of semi-source pole driving architecture, wherein this display panel has at least one pixel, this pixel uses an electric capacity with storage voltage, one termination of this electric capacity is received the video data by data line input, the other end is electrically coupled to community electrode, and this driving method is characterised in that and comprises the following steps:
Adjustment provides the decline time to a rise time of the rising edge of the community electrode drive signal of this common electrode and negative edge, to improve the perpendicular line striped phenomenon of this display panel.
13. driving method as claimed in claim 12 also comprises the following steps:
Use an AC signal to be coupled a direct-current input power supplying to produce this common electrode drive signal.
14. driving method as claimed in claim 13, wherein adjusting provided to this rise time of the rising edge of this common electrode drive signal of this common electrode and this fall time of negative edge, was to reach by adjusting this AC signal.
15. driving method as claimed in claim 14 also comprises:
The resistance of an employed signal transmission line when adjusting this AC signal of transmission is so that the waveform of this AC signal is adjusted to a predetermined form.
16. driving method as claimed in claim 15, wherein the setting of the resistance of this signal transmission line is to get according to Y=a*X+d, Y for the microsecond be unit this rise time or should fall time, X is for being the resistance of this signal transmission line of unit with ohm, 0.015＜a＜0.12 and 0.01＜d＜12.
17. driving method as claimed in claim 13, wherein this AC signal comprises the stepped waveform with the step-wise manner rise and fall.
18. driving method as claimed in claim 13, wherein
Make at least one rising edge of this AC signal use two or more different ascending velocity, and the ascending velocity of the ascending velocity before relatively is slow; And
Make at least one negative edge of this AC signal use two or more different decline rates, and the decline rate of the decline rate before relatively is slow.
19. driving method as claimed in claim 12 adjusts wherein that to provide to the step of this common electrode drive signal of this common electrode be that the resistance of an employed signal transmission line is reached when adjusting this common electrode drive signal of transmission.
20. driving method as claimed in claim 19, wherein the setting of the resistance of this signal transmission line is to get according to Y=a*X+d, Y for the microsecond be unit this rise time or should fall time, X is for being the resistance of this signal transmission line of unit with ohm, 0.015＜a＜0.12 and 0.01＜d＜12.
21. driving method with display panel of semi-source pole driving architecture, wherein this display panel has at least one pixel, this pixel uses an electric capacity with storage voltage, one termination of this electric capacity is received the video data by data line input, the other end is electrically coupled to community electrode, and this driving method comprises:
Obtain a direct-current input power supplying;
Use the square-wave signal of a distortion to be coupled this direct-current input power supplying to produce the community electrode drive signal; And
Provide this common electrode drive signal to this common electrode.
22. driving method as claimed in claim 21, wherein the square-wave signal of this distortion is a rescinded angle square-wave signal, a fillet square-wave signal or a stepped square-wave signal.
23. driving method as claimed in claim 21, wherein providing of the square-wave signal of this distortion comprises step:
Receive a square-wave signal; And
This square-wave signal is transmitted by a signal transmission line, and the resistance of this signal transmission line is set to the effect that can reach the square-wave signal of adjusting this square-wave signal and must this distortion.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101699552B (en) * | 2009-11-16 | 2012-04-18 | 友达光电股份有限公司 | Grid output control method and corresponding grid pulse modulator |
| CN101593496B (en) * | 2009-06-26 | 2013-08-14 | 友达光电股份有限公司 | Grid output control method |
| TWI406257B (en) * | 2010-02-01 | 2013-08-21 | Au Optronics Corp | Display circuit adapted for a display and display |
| CN105225652A (en) * | 2015-11-06 | 2016-01-06 | 京东方科技集团股份有限公司 | A kind of driving method of display device, device and display device |
| WO2016086520A1 (en) * | 2014-12-02 | 2016-06-09 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and display device |
| CN110767186A (en) * | 2019-09-29 | 2020-02-07 | 福建华佳彩有限公司 | Driving method of dual-gate panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101593496B (en) * | 2009-06-26 | 2013-08-14 | 友达光电股份有限公司 | Grid output control method |
| CN101699552B (en) * | 2009-11-16 | 2012-04-18 | 友达光电股份有限公司 | Grid output control method and corresponding grid pulse modulator |
| TWI406257B (en) * | 2010-02-01 | 2013-08-21 | Au Optronics Corp | Display circuit adapted for a display and display |
| WO2016086520A1 (en) * | 2014-12-02 | 2016-06-09 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and display device |
| US9958738B2 (en) | 2014-12-02 | 2018-05-01 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Liquid crystal display panel and display device |
| CN105225652A (en) * | 2015-11-06 | 2016-01-06 | 京东方科技集团股份有限公司 | A kind of driving method of display device, device and display device |
| CN105225652B (en) * | 2015-11-06 | 2017-12-08 | 京东方科技集团股份有限公司 | A kind of driving method of display device, device and display device |
| WO2020093604A1 (en) * | 2018-11-09 | 2020-05-14 | 惠科股份有限公司 | Display panel and driving method therefor |
| CN110767186A (en) * | 2019-09-29 | 2020-02-07 | 福建华佳彩有限公司 | Driving method of dual-gate panel |
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