CN100388071C - Driving method of liquid crystal display panel - Google Patents
Driving method of liquid crystal display panel Download PDFInfo
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- CN100388071C CN100388071C CNB2006100770577A CN200610077057A CN100388071C CN 100388071 C CN100388071 C CN 100388071C CN B2006100770577 A CNB2006100770577 A CN B2006100770577A CN 200610077057 A CN200610077057 A CN 200610077057A CN 100388071 C CN100388071 C CN 100388071C
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- sweep trace
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- thin film
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000004973 liquid crystal related substance Substances 0.000 title abstract 3
- 239000010409 thin film Substances 0.000 claims description 46
- 230000008676 import Effects 0.000 claims description 4
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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Abstract
The present invention relates to a driving method of a liquid crystal display panel, wherein the liquid crystal display panel comprises a first scan line, a second scan line, a data line, a first pixel and a second pixel. The first pixel is provided with a first switch, a second switch and a first pixel electrode, and the second pixel is provided with a third switch and a second pixel electrode. The driving method comprises the following steps: firstly, in the first time sequence stage, the first scan line and the second scan line are simultaneously enabled, and the first pixel voltage is input to the data line. Afterwards, in the second time sequence stage, the first scan line is enabled and the second scan line is prohibited. The time span of the second time sequence stage is shorted than that of the first time sequence stage, and the second pixel voltage is input to the data line.
Description
Technical field
The present invention is relevant for a kind of driving method of display panels, and particularly a kind of driving method that is applied to use the display panels of the pixel with double thin-film transistors.
Background technology
Please refer to Fig. 1, it represents the equivalent circuit diagram of the partial pixel of traditional display panels.In Fig. 1, in delegation's pixel, per two neighbors are shared a data line.With the left pixel LP among Fig. 1 (m, n) with right pixel RP (m n) is example, these two pixels all with sweep trace S
M+1With data line D
nCouple, and lay respectively at data line D
nBoth sides, divide another name be left pixel LP (m, n) and right pixel RP (m, n).
(m n) is controlled by thin film transistor (TFT) M21 and thin film transistor (TFT) M22 right pixel RP.The grid of thin film transistor (TFT) M21 (gate) and sweep trace S
M+1Be electrically connected, and source electrode and data line D
nBe electrically connected.The grid of thin film transistor (TFT) M22 and sweep trace S
M+2Be electrically connected, and source electrode is electrically connected with thin film transistor (TFT) M21.(m n) is controlled by thin film transistor (TFT) M11 and thin film transistor (TFT) M12 left side pixel LP.The grid of thin film transistor (TFT) M11 and sweep trace S
M+1Be electrically connected, and source electrode and data line D
nBe electrically connected the grid of thin film transistor (TFT) M12 and sweep trace S
mBe electrically connected, and its source electrode is electrically connected with the drain electrode of thin film transistor (TFT) M11.Each pixel on the display panel all can be divided into two classes according to the relative position of itself and data line, is respectively left pixel LP and right pixel RP.
Please refer to Fig. 2, in the circuit of its presentation graphs 1, sweep trace S
m, S
M+1And S
M+2The sequential chart of sweep signal.Scan each scan operation of carrying out of row pixel and all can be divided into two scan operations, scan operation for the first time scans left pixel LP all in this row pixel, and scan operation for the second time scans right pixel RP all in this row pixel.For example: when the capable pixel of scanning m, at first, when the first sequential stage T1, enable earlier sweep trace S simultaneously
mWith S
M+1At this moment, thin film transistor (TFT) M11 and M12 conducting all simultaneously is so pixel voltage can pass through data line D
nImport left pixel LP (m, n) in.So, then finish scan operation for the first time.Afterwards, when the second sequential stage T2, carry out the scan operation second time, enable sweep trace S
M+1With S
M+2At this moment, thin film transistor (TFT) M21 and M22 conducting are so pixel voltage can pass through data line D
nImport right pixel RP (m, n) in.
Yet, because each pixel all has two thin film transistor (TFT)s, so aperture opening ratio will be also lower than the pixel that only has a thin film transistor (TFT).In order to increase aperture opening ratio, another kind of dot structure is suggested.Please refer to Fig. 3, it represents the equivalent circuit diagram of the partial pixel of known another kind of display panels.(m, n) (m n) is example with right pixel RP with the left pixel LP among Fig. 3.Wherein, (m n) is controlled by thin film transistor (TFT) M2 right pixel RP, its grid (gate) and sweep trace S
mBe electrically connected, and first end is and data line D
nBe electrically connected.(m n) is controlled by thin film transistor (TFT) M11 and thin film transistor (TFT) M12 left side pixel LP.The grid of thin film transistor (TFT) M11 and sweep trace S
M+1Be electrically connected, source electrode then is and data line D
nBe electrically connected.The grid of thin film transistor (TFT) M12 and sweep trace S
mBe electrically connected, source electrode then is to be electrically connected with the drain electrode of thin film transistor (TFT) M11.
Please refer to Fig. 4, in the circuit of its presentation graphs 3, sweep trace S
m, S
M+1And S
M+2The sequential chart of sweep signal.Scan each scan operation of carrying out of row pixel and all can be divided into two scan operations, scan operation for the first time scans left pixel LP all in this row pixel, and scan operation for the second time scans right pixel RP all in this row pixel.For example: when the capable pixel of scanning m, at first, when the first sequential stage T1, enable sweep trace S earlier
mWith S
M+1At this moment, thin film transistor (TFT) M11 and M12 conducting all simultaneously is so pixel voltage can pass through data line D
nImport left pixel LP (m, n) in.So, then finish scan operation for the first time.Afterwards, when the second sequential stage T2, carry out the scan operation second time, only enable sweep trace S
mAt this moment, thin film transistor (TFT) M2 conducting is so pixel voltage can pass through data line D
nImport right pixel RP (m, n) in.
In this conventional practice, sweep trace S
mWith S
M+1In the first sequential stage T1, keep the time of enabling, with sweep trace S
mKeeping time of enabling in the second sequential stage T2 equates.Therefore, (m, n) (m, duration of charging n) equates left pixel LP with right pixel RP.
Above-mentioned colleague's neighbor is shared the display panels of a data line, utilizes in-line thin film transistor (TFT) to realize that by different scan control signals same data line charges to adjacent two pixels of going together.Because data line is during for the charging of the pixel electrode of the left pixel LP that is coupled with two thin film transistor (TFT)s, must be through two thin film transistor (TFT)s, so the electric current the when current ratio when left pixel LP charged is charged to right pixel RP is also little.So, the charging ability of left pixel LP will be also lower than right pixel RP significantly.So, will make left pixel LP that the phenomenon of undercharge is arranged, and cause to demonstrate correct brightness and reduce picture quality at the driving method of Fig. 4.
Summary of the invention
In view of this, purpose of the present invention is exactly that a kind of driving method of display panels is being provided, adjacent two pixels of colleague by making the shared data line have the different duration of charging, with the phenomenon of the pixel undercharge that solves display panels, to improve picture quality.
According to purpose of the present invention, a kind of driving method of display panels is proposed, display panels comprises first sweep trace, second sweep trace, data line, first pixel and second pixel.First pixel has first switch, the second switch and first pixel electrode, second pixel has the 3rd switch and second pixel electrode, first end of first switch is connected to data line, the control end of first switch is connected to second sweep trace, first end of second switch is connected to second end of first switch, the control end of second switch is connected to first sweep trace, second end of second switch is connected to first pixel electrode, the control end of the 3rd switch is connected to first sweep trace, first end of the 3rd switch is connected to data line, and second end of the 3rd switch is connected to second pixel electrode.Driving method comprises descending step, at first, in the first sequential stage, enable (enable) first sweep trace and second sweep trace simultaneously, and import first pixel voltage to data line, first pixel voltage is sent to first pixel electrode and second pixel electrode simultaneously, and first pixel voltage is corresponding to first pixel data of first pixel.Afterwards, in the second sequential stage, enable first sweep trace and forbid (disable) second sweep trace, the time span in this second sequential stage was shorter than for the first sequential stage, and import second pixel voltage to data line, second pixel voltage is sent to second pixel electrode, and second pixel voltage is corresponding to second pixel data of second pixel.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail as follows:
Description of drawings
Fig. 1 represents the equivalent circuit diagram of the part pixel of traditional display panels.
In the circuit of Fig. 2 presentation graphs 1, sweep trace S
m, S
M+1And S
M+2The sequential chart of sweep signal.
Fig. 3 represents the equivalent circuit diagram of the partial pixel of known another kind of display panels.
In the circuit of Fig. 4 presentation graphs 3, sweep trace S
m, S
M+1And S
M+2The sequential chart of sweep signal.
Fig. 5 represents the sequential chart according to the signal of the driving method of the display panels of preferred embodiment of the present invention.
The primary clustering symbol description
M11, M12, M2, M21, M22, M31, M32, M4, M41, M42: thin film transistor (TFT)
Embodiment
Please refer to Fig. 5, its expression is according to the sequential chart of the signal of the driving method of the display panels of preferred embodiment of the present invention.Driving method of the present invention can be applicable in the pel array shown in Figure 3.Fig. 5 is with in order to input to the sweep trace S of Fig. 3
m, S
M+1And S
M+2Sweep signal be that example explains.Please be simultaneously with reference to Fig. 3.Scan each scan operation of carrying out of row pixel and all can be divided into two scan operations, scan operation for the first time scans left pixel LP all in this row pixel, and scan operation for the second time scans right pixel RP all in this row pixel.For example, when the capable pixel of scanning m, at first, when the first sequential stage T1 ', enable sweep trace S earlier
mWith S
M+1At this moment, thin film transistor (TFT) M11 and M12 conducting all simultaneously is so first pixel voltage can pass through data line D
nImport left pixel LP (m, n) in.So, then finish scan operation for the first time.Afterwards, when the second sequential stage T2 ', carry out the scan operation second time, only enable sweep trace S
mAt this moment, thin film transistor (TFT) M2 conducting is so second pixel voltage can pass through data line D
nImport right pixel RP (m, n) in.
Be noted that in this scan operation, the first sequential stage T1 ' is longer than the second sequential stage T2 ', this is that (m, duration of charging n) is greater than right pixel RP (m, duration of charging n) for left pixel LP.Thus, ((m n) has time enough to be charged to due voltage to left pixel LP to allow left pixel LP for m, n) duration of charging lengthening.So, then can solve in the conventional practice left pixel LP (m, n) charging ability deficiency
Furthermore, when carrying out first time scan operation, the thin film transistor (TFT) of right pixel, for example, (m, thin film transistor (TFT) M2 n) also can conducting for right pixel RP.So the script desire is imported first pixel voltage of left pixel LP and also can be inputed among the right pixel RP.But the scan operation of carrying out the immediately second time can be imported the second correct pixel voltage among the right pixel RP.In addition, when carrying out second time scan operation, one of them of two thin film transistor (TFT)s of left pixel LP, for example (m, thin film transistor (TFT) M12 n) no doubt also can conducting for LP.But because in the same pixel, another and the thin film transistor (TFT) that couples, the thin film transistor (TFT) M11 that couples with thin film transistor (TFT) M12 for example, not conducting can't input among the left pixel LP so desire is imported second pixel voltage of right pixel by mistake.So, after the scan operation of finishing one-row pixels, the shown pixel voltage of each pixel in this row pixel is all correct data.
After the scanning of finishing the capable pixel of m, then scan the capable pixel of m+1.The scan operation that scans the capable pixel of m+1 is identical with the scan operation of the capable pixel of scanning m, does not repeat them here.So, in regular turn each row pixel is carried out scan operation, driving circuit is each pixel on the may command display panel.
In addition, when pixel voltage that left pixel LP and right pixel RP received is identical polar, will obtain better effect when using present embodiment.When the charging polarity of right pixel RP is same as under the situation of left pixel LP, when left pixel LP first when the sequential stage, T1 ' charged, also charging simultaneously of right pixel RP and reach a certain magnitude of voltage.Because left pixel LP is identical with the polarity of right pixel RP, so the size of the two pixel voltage that will receive is also approaching can be more inequality than the polarity of left pixel LP and right pixel RP the time.So the voltage that the charging operations in the second sequential stage T2 ' only need be supplied right pixel RP further and is short of or allow right pixel RP discharge descend with the voltage that produces slightly can make right pixel RP reach due magnitude of voltage.So,, should also enough allow right pixel RP be charged to due voltage in the duration of charging though the duration of charging of right pixel RP is shorter.
That is to say, in the whole duration of charging of each row pixel with under for fixing situation, that is allow Fig. 5 T1 ' and T2's ' and the T1 that equals Fig. 4 with T2's and situation under, present embodiment can reach the problem of the left pixel LP charging ability deficiency of solution.Use present embodiment under the condition in the whole duration of charging that does not increase each row pixel, to make left pixel LP and right pixel RP all can be charged to desired pixel voltage and reach, and to be produced correct brightness.
Above-mentioned left pixel LP and the driving of right pixel RP order also can be and drive right pixel RP earlier, drive the order of left pixel LP again.In addition, present embodiment also can be applicable to that left pixel LP has a thin film transistor (TFT) and right pixel RP has in the structure of two thin film transistor (TFT)s.Only need allow the duration of charging of pixel get final product greater than duration of charging of pixel with a thin film transistor (TFT) with two thin film transistor (TFT)s.
The disclosed driving method that a kind of display panels is provided of the above embodiment of the present invention, the adjustment in the duration of charging by colleague's neighbor shared data line, compensate with pixel the charging ability deficiency, allow adjacent pixels can both charge to desired pixel voltage, not enough and make the problem that picture quality reduces with the brightness that the pixel undercharge was caused that solves traditional display panels.Simultaneously, two pixels of the present invention only need use three thin film transistor (TFT)s, so also can keep high aperture simultaneously.
Though the present invention with preferred embodiment openly as above; right its is not that any those skilled in the art are under the situation that does not break away from the spirit and scope of the present invention in order to qualification the present invention; can change and modification, so protection scope of the present invention is as the criterion with the claim institute restricted portion that is proposed.
Claims (5)
1. the driving method of a display panels, this display panels comprises one first sweep trace at least, one second sweep trace, one data line, one first pixel and one second pixel, this first pixel has one first switch, one second switch and one first pixel electrode, this second pixel has one the 3rd switch and one second pixel electrode, one first end of this first switch is connected to this data line, one control end of this first switch is connected to this second sweep trace, one first end of this second switch is connected to one second end of this first switch, one control end of this second switch is connected to this first sweep trace, one second end of this second switch is connected to this first pixel electrode, one control end of the 3rd switch is connected to this first sweep trace, one first end of the 3rd switch is connected to this data line, one second end of the 3rd switch is connected to this second pixel electrode, wherein this of this display panel first sweep trace is parallel and adjacent to this second sweep trace, this data line is orthogonal to this first sweep trace and this second sweep trace, and this driving method comprises:
In one first sequential stage, enable this first sweep trace and this second sweep trace simultaneously, and import one first pixel voltage to this data line, this first pixel voltage is sent to this first pixel electrode and this second pixel electrode simultaneously, and this first pixel voltage is corresponding to one first pixel data of this first pixel; And
In one second sequential stage, enable this first sweep trace and forbid this second sweep trace, the time span in this second sequential stage is shorter than this first sequential stage, and import one second pixel voltage to this data line, this second pixel voltage is sent to this second pixel electrode, and this second pixel voltage is corresponding to one second pixel data of this second pixel.
2. driving method as claimed in claim 1, wherein this first pixel voltage and this second pixel voltage pixel voltage that is identical polar.
3. driving method as claimed in claim 1, wherein this of this display panel first switch, this second switch and the 3rd switch are all a thin film transistor (TFT).
4. driving method as claimed in claim 3, wherein this thin film transistor (TFT) of this display panel is a N type thin film transistor (TFT).
5. driving method as claimed in claim 3, wherein this thin film transistor (TFT) of this display panel is a P type thin film transistor (TFT).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100770577A CN100388071C (en) | 2006-04-26 | 2006-04-26 | Driving method of liquid crystal display panel |
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|---|---|---|---|
| CNB2006100770577A CN100388071C (en) | 2006-04-26 | 2006-04-26 | Driving method of liquid crystal display panel |
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| CN1831927A CN1831927A (en) | 2006-09-13 |
| CN100388071C true CN100388071C (en) | 2008-05-14 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101458429B (en) * | 2007-12-12 | 2011-12-21 | 群康科技(深圳)有限公司 | LCD and driving method thereof |
| CN101887697B (en) * | 2009-05-11 | 2012-12-12 | 联咏科技股份有限公司 | Method for reducing resonance energy of liquid crystal display panel and liquid crystal display |
| CN101763809B (en) * | 2010-01-13 | 2014-02-12 | 友达光电股份有限公司 | Display device and driving method of display panel thereof |
| CN101783128B (en) * | 2010-04-02 | 2012-08-08 | 福州华映视讯有限公司 | Method for driving liquid crystal display |
| CN109767739B (en) * | 2019-03-08 | 2021-06-08 | 上海天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN113728375B (en) | 2020-02-20 | 2023-01-24 | 京东方科技集团股份有限公司 | Display panel, driving method thereof and display device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05188395A (en) * | 1992-01-14 | 1993-07-30 | Toshiba Corp | Liquid crystal display element |
| JPH05265045A (en) * | 1992-03-19 | 1993-10-15 | Fujitsu Ltd | Active matrix type liquid crystal display device and its driving circuit |
| CN1278073A (en) * | 1999-06-04 | 2000-12-27 | 权五敬 | Liquid crystal display |
| CN1357872A (en) * | 2000-12-07 | 2002-07-10 | 国际商业机器公司 | Image display unit, image display equipment and image display unit driving method |
| CN1619635A (en) * | 2003-11-21 | 2005-05-25 | 夏普株式会社 | Liquid crystal display device, driving circuit for the same and driving method for the same |
-
2006
- 2006-04-26 CN CNB2006100770577A patent/CN100388071C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05188395A (en) * | 1992-01-14 | 1993-07-30 | Toshiba Corp | Liquid crystal display element |
| JPH05265045A (en) * | 1992-03-19 | 1993-10-15 | Fujitsu Ltd | Active matrix type liquid crystal display device and its driving circuit |
| CN1278073A (en) * | 1999-06-04 | 2000-12-27 | 权五敬 | Liquid crystal display |
| CN1357872A (en) * | 2000-12-07 | 2002-07-10 | 国际商业机器公司 | Image display unit, image display equipment and image display unit driving method |
| CN1619635A (en) * | 2003-11-21 | 2005-05-25 | 夏普株式会社 | Liquid crystal display device, driving circuit for the same and driving method for the same |
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| CN1831927A (en) | 2006-09-13 |
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