CN1763824A - Display panel and method for driving an LCD panel - Google Patents
Display panel and method for driving an LCD panel Download PDFInfo
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- CN1763824A CN1763824A CN 200510091000 CN200510091000A CN1763824A CN 1763824 A CN1763824 A CN 1763824A CN 200510091000 CN200510091000 CN 200510091000 CN 200510091000 A CN200510091000 A CN 200510091000A CN 1763824 A CN1763824 A CN 1763824A
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Abstract
The present invention provides a method for driving an LCD panel. The method includes the steps of providing a scan signal to each of the scan lines during the scan period of each scan line, providing a plurality of panel control signals in a first permutation to the horizontal switch during the scan period of a first scan line, and providing a plurality of panel control signals in a second permutation to the horizontal switch during the scan period of a second scan line, wherein the second permutation is different from the first permutation.
Description
Technical field
The present invention relates to a kind of display panel and driving method for liquid crystal display panel.Be particularly related to display panel and driving method for liquid crystal display panel that the not homotactic panel control signals of a kind of usefulness drives.
Background technology
Fig. 1 is the part synoptic diagram of the driving circuit of a low temperature polycrystalline silicon (low temperature poly-silicon is hereinafter to be referred as LTPS) liquid crystal display (liquid crystal display is hereinafter to be referred as LCD) panel.Time schedule controller (timing controller) 101 provides data-signal to source electrode driver (sourcedriver) 103.Source electrode driver 103 converts data-signal to simulating signal by digital signal, provides analog data signal 110 and 111 to transversal switch (horizontal switch) 104 and 105 then respectively.Time schedule controller 101 also provides panel control signals CKH1-CKH3 to level translator (level shifter) 102.After level translator 102 amplifies panel control signals CKH1-CKH3, they are provided to transversal switch 104 and 105.
The operation of the operation of transversal switch 105 and transversal switch 104 is similar.Difference is that transversal switch 105 switches to second pixel of a sweep trace with analog data signal 111, rather than analog data signal 110 is switched to first pixel of a sweep trace.101 li of time schedule controllers a data response mechanism is arranged, when guaranteeing the low pulse of some panel control signals output, correct data-signal can occur.Though Fig. 1 only shows two transversal switches; But a LCD panel can comprise at least two transversal switch.
Driving circuit in Fig. 1 is applicable to the LCD panel of low resolution.When the LCD panel resolution rate was more and more higher, transversal switch often was integrated into bigger integrated circuit to reduce core number.Fig. 3 is the part synoptic diagram of the driving circuit of high resolving power LTPS LCD panel.
Transversal switch among Fig. 3 many greatly than among Fig. 1.Each transversal switch 304 and 305 is driven by six panel control signals (CKH1-CKH6), and the data line of six outputs is arranged.Transversal switch 304 is connected with data line R1, G1, B1, R2, G2 and B2.305 of transversal switches are connected with data line R3, G3, B3, R4, G4 and B4.But the transversal switch that surpasses three data lines has potential luminance difference problem.Because the coupling effect that regular time sequence (as shown in Figure 2) and stray capacitance (parasite capacitance) cause, when in the LCD panel, using above-mentioned transversal switch, between two adjacent perpendicular line of same GTG, have slight luminance difference.This can destroy the uniformity coefficient of the show image of LCD panel.Therefore, we need a kind of method can solve the driving homogeneity question that large-scale transversal switch produced.
Summary of the invention
In different viewpoints of the present invention, provide a kind of driving method for liquid crystal display panel, comprise the following steps: scan period at each bar sweep trace, provide a sweep signal to each bar sweep trace, in scan period of article one sweep trace, a plurality of panel control signals that one first sequence is provided to transversal switch, and in the scan period of second sweep trace, a plurality of panel control signals that one second sequence is provided are to transversal switch.Wherein second sequence and first sequence are inequality.
As for other advantage of the present invention, a part will state in the explanation under connecing, and another part is conspicuous in the explanation, perhaps can learn from practical operation of the present invention.Advantage of the present invention will be by obtaining to realize in element that specializes in the claims and the combination.
Aforesaid general description and following detailed description are that example is explained, are not to be used for limiting claim of the present invention.
Description of drawings
Fig. 1 is the part synoptic diagram of driving circuit of the LTPS LCD panel of a low resolution.
Fig. 2 is the time series of the traditional panel control signal of Fig. 1.
Fig. 3 is the part synoptic diagram of the driving circuit of a high-resolution LTPS LCD panel.
Fig. 4 is the time series according to the panel control signals of one embodiment of the invention.
Fig. 5 is the process flow diagram according to the driving method for liquid crystal display panel of one embodiment of the invention.
Fig. 6 is a synoptic diagram that comprises the electronic installation of the method LCD driven panel of using Fig. 5.
The main element description of symbols
101: time schedule controller
102: level translator
103: source electrode driver
104: transversal switch
105: transversal switch
304: transversal switch
305: transversal switch
502～508: flow chart step
600: electronic installation
601: transversal switch
602: gate drivers
The 603:LCD panel
611, R1～R4, G1～G4, B1～B4: data line
Embodiment
The conventional ADS driving method of LCD panel be to all sweep traces all use one regular time sequence panel control signals.Comparatively speaking, driving method disclosed here then is that adjacent sweep trace is used different time serieses, to break up the difference of brightness.
Table 1 shows the time series that one embodiment of the invention is used.In this embodiment, three panel control signals (CKH1-CKH3) can be arranged, and this embodiment uses six kinds of time serieses of above-mentioned three panel control signals.A kind of the putting in order (permutation) that time series is exactly a panel control signals.These sequences can recycle.For example, sweep trace 7 can with the identical sequence of sweep trace 1 usefulness, sweep trace 8 can with the identical sequence of sweep trace 2 usefulness, the rest may be inferred.Fig. 4 is with six kinds of above-mentioned time serieses of another kind of method representation.
The time series example of 1:3 panel control signals of table
| Sweep trace | Time series |
| Sweep trace 1 | CKH1，CKH2，CKH3 |
| Sweep trace 2 | CKH1，CKH3，CKH2 |
| Sweep trace 3 | CKH2，CKH1，CKH3 |
| Sweep trace 4 | CKH3，CKH1，CKH2 |
| Sweep trace 5 | CKH3，CKH2，CKH1 |
| Sweep trace 6 | CKH2，CKH3，CKH1 |
Table 2 shows the time series that another embodiment of the present invention is used.In this embodiment, 6 panel control signals (CKH1-CKH6) can be arranged.Can see that by table 2 this embodiment can only use 720 kinds of 6 panel control signals 8 kinds of arrangements in may arranging.This embodiment does not need to use the possible sequence of institute of panel control signals, as long as be reduced to less than a preset critical by the luminance difference of instrument test, gets final product so that the human body naked eyes can't be discovered.
The time series example of 2:6 panel control signals of table
| Sweep trace | Time series |
| Sweep trace 1 | CKH1，CKH2，CKH3，CKH4，CKH5，CKH6 |
| Sweep trace 2 | CKH4，CKH2，CKH3，CKH1，CKH5，CKH6 |
| Sweep trace 3 | CKH1，CKH5，CKH3，CKH4，CKH2，CKH6 |
| Sweep trace 4 | CKH1，CKH2，CKH6，CKH4，CKH5，CKH3 |
| Sweep trace 5 | CKH4，CKH5，CKH3，CKH1，CKH2，CKH6 |
| Sweep trace 6 | CKH1，CKH5，CKH6，CKH4，CKH2，CKH3 |
| Sweep trace 7 | CKH4，CKH2，CKH6，CKH1，CKH5，CKH3 |
| Sweep trace 8 | CKH4，CKH5，CKH6，CKH1，CKH2，CKH3 |
In the above-mentioned embodiment that discusses, can suppose the panel control signals transversal switch that used the logic low trigger action.In other embodiments of the invention, panel control signals also can be used logic high trigger action transversal switch.
Fig. 5 is the entire flow figure of LCD panel driving method according to an embodiment of the invention.The driving method of present embodiment comprises the following steps.
Method begins in step 502, and the institute in a plurality of panel control signals might choose at least two kinds of sequences in the sequence earlier.In step 506 li, then be the data correspondence of adjusting time schedule controller according to the circular order of selected sequence.Time schedule controller provides panel control signals.Moreover the data correspondence can be adjusted according to sequence, switches correct data-signal to corresponding data line to guarantee transversal switch.Then, in step 508,, drive all transversal switches of LCD panel with the circular order of the sequence that has chosen; Wherein each sequence that has chosen is used for a sweep trace.
Fig. 6 is the synoptic diagram that drives the electronic installation 600 of LCD panel 603 according to the method in Fig. 5.Electronic installation 600 can be a TV or monitor (monitor).Electronic installation 600 can comprise time schedule controller 101, level translator 102, source electrode driver 103, LCD panel 603 and a plurality of transversal switch 601.Time schedule controller 101 can provide data-signal to source electrode driver 103, and the gate drivers of grid control signal to 603 li of LCD panels (gate driver) 602 can be provided.Source electrode driver 103 can be converted to simulating signal from digital signal with data-signal, can provide analog data signal to transversal switch 601 then.Time schedule controller 101 also can provide panel control signals to level translator 102.Level translator 102 scalable panel control signals can reach transversal switch 601 with the panel control signals after amplifying then.
Each transversal switch 601 can be accepted a plurality of panel control signals, and can be connected to one or several data line, for example is data line 611.Transversal switch 601 tolerable analog data signals enter corresponding data line.In the scanning process of each bar sweep trace, gate drivers 602 convertible grid control signals become sweep signal, with the loading simulation data-signal to the pixel of LCD panel 603.In other the embodiment, level translator 102 can merge to LCD panel 603 the insides at some.
By can seeing in the above embodiments, by changing the putting in order of the panel control signals of each bar sweep trace, driving method for liquid crystal display panel of the present invention can solve the homogeneity question that color shows.The result is can spread between the multi-strip scanning line at the luminance difference between the perpendicular line, so that luminance difference can the smooth-going degree that can't discover to the human body naked eyes.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any person of ordinary skill in the field; without departing from the spirit and scope of the present invention; when can doing a little change and improvement, so protection scope of the present invention is as the criterion when looking the claim person of defining.
Claims (10)
1. driving method for liquid crystal display panel, at least one transversal switch that this display panels has the multi-strip scanning line and is used for sending data-signal is characterized in that this driving method for liquid crystal display panel comprises the following steps:
In the scan period of each bar sweep trace, provide sweep signal to each bar sweep trace;
In the scan period of first sweep trace, a plurality of panel control signals that first sequence is provided are to this transversal switch; And,
In the scan period of second sweep trace, a plurality of panel control signals that second sequence is provided are to this transversal switch; And this second sequence is different from this first sequence.
2. the method according to claim 1 is characterized in that this first sequence of above-mentioned these panel control signals and this second sequence are to offer above-mentioned these sweep traces with circular order.
3. the method according to claim 1, the quantity that it is characterized in that above-mentioned these panel control signals is three.
4. the method according to claim 1 is characterized in that the sequence of panel control signals of per two adjacent scanning lines is different.
5. the method according to claim 1, the sequence that it is characterized in that the panel control signals of per two adjacent scanning lines is identical.
6. display panel is characterized in that comprising:
Pel array comprises multi-strip scanning line and many data lines that input signal is used;
Gate drivers with in the scan period of each bar sweep trace, provides sweep signal to each bar sweep trace;
At least one transversal switch is controlled the transmission of a plurality of data-signals to above-mentioned these data lines; And
Time schedule controller, in the scan period of first sweep trace, a plurality of panel control signals that first sequence is provided are to this transversal switch and in the scan period of second sweep trace, and a plurality of panel control signals that second sequence is provided are to this transversal switch, and wherein this second sequence is different from this first sequence.
7. the display panel according to claim 6 is characterized in that also comprising source electrode driver, and this time schedule controller provides above-mentioned these data-signals to this source electrode driver, and this source electrode driver transmits above-mentioned these data-signals to this transversal switch.
8. the display panel according to claim 6 is characterized in that this first sequence of above-mentioned these panel control signals and this second sequence are to offer above-mentioned these sweep traces with circular order.
9. the display panel according to claim 6, the quantity that it is characterized in that above-mentioned these panel control signals is three.
10. the display panel according to claim 6 is characterized in that the sequence of panel control signals of per two adjacent scanning lines is different.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US61991904P | 2004-10-20 | 2004-10-20 | |
| US60/619,919 | 2004-10-20 | ||
| US11/138,629 | 2005-05-26 |
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| CN1763824A true CN1763824A (en) | 2006-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200510091000 Pending CN1763824A (en) | 2004-10-20 | 2005-08-24 | Display panel and method for driving an LCD panel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013075305A1 (en) * | 2011-11-22 | 2013-05-30 | 深圳市华星光电技术有限公司 | Array substrate and drive method thereof |
| CN109741714A (en) * | 2019-02-15 | 2019-05-10 | 深圳市华星光电技术有限公司 | Source electrode drive circuit |
-
2005
- 2005-08-24 CN CN 200510091000 patent/CN1763824A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013075305A1 (en) * | 2011-11-22 | 2013-05-30 | 深圳市华星光电技术有限公司 | Array substrate and drive method thereof |
| CN109741714A (en) * | 2019-02-15 | 2019-05-10 | 深圳市华星光电技术有限公司 | Source electrode drive circuit |
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