CN101192380A - Driving method of liquid crystal display - Google Patents
Driving method of liquid crystal display Download PDFInfo
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- CN101192380A CN101192380A CNA2006101570309A CN200610157030A CN101192380A CN 101192380 A CN101192380 A CN 101192380A CN A2006101570309 A CNA2006101570309 A CN A2006101570309A CN 200610157030 A CN200610157030 A CN 200610157030A CN 101192380 A CN101192380 A CN 101192380A
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Abstract
The invention relates to a driving method for a liquid crystal display. The liquid crystal display for which the driving method is adopted comprises a liquid crystal display panel and a plurality of light sources and the liquid crystal display panel comprises a scanning driver, a time schedule controller and a plurality of scanning lines. A plurality of light sources is controlled by an inverter. The driving method comprises the following steps: in the time of some certain frame, the time schedule controller controls the scanning driver to generate the scanning signal and the time schedule controller controls the inverter to turn on or off a plurality of light sources in order; when some light source is turned on, the scanning signal is applied to the scanning line corresponding to the irradiation area of the light source once; when the light source is turned off, the scanning signal is applied to the scanning line to which the light source corresponds for at least another time; in the time of the next frame, the steps are carried out again.
Description
Technical field
The present invention relates to a kind of driving method of LCD.
Background technology
Because advantages such as the liquid crystal display utensil is light, thin, power consumption is low are widely used in modernized information equipments such as TV, mobile computer, mobile phone and personal digital assistant.
Seeing also Fig. 1, is a kind of perspective exploded view of LCD of prior art.This LCD 1 comprises a display panels 10 and a back light unit 12.This display panels 10 and these back light unit 12 superimposed settings.
Seeing also Fig. 2 again, is the driving circuit synoptic diagram of LCD 1 shown in Figure 1.This display panels 10 comprises one scan driver 14, a data driver 16, time schedule controller 18, the sweep trace 101 that multirow is parallel to each other, data line 103, a plurality of pixel electrode 105, a plurality of thin film transistor (TFT) 107 and a plurality of public electrode 109 that multiple row is parallel to each other.
This time schedule controller 18 is connected with this data driver 16 with this scanner driver 14 respectively, and provides control signal to control this scanner driver 14 and this data driver 16 respectively; This scanner driver 14 drives this sweep trace 101, and this data driver 16 drives this data line 103; This sweep trace 101 and this data line 103 are arranged in a crossed manner and define a plurality of pixel cells 108, this pixel electrode 105 is arranged in the pixel cell 108 that this sweep trace 101 and this data line 103 limited with matrix structure, and this public electrode 109 is oppositely arranged with this pixel electrode 105; The grid that is positioned at each thin film transistor (TFT) 107 of this sweep trace 101 and these data line 103 infalls is connected to one scan line 101, the source electrode of each thin film transistor (TFT) 107 is connected to a data line 103, and the drain electrode of each thin film transistor (TFT) 107 is connected to a pixel electrode 105.
This back light unit 12 comprises an inverter 15 and a plurality of fluorescent tube 13.The duty of these inverter 15 these a plurality of fluorescent tubes 13 of control.
When this LCD 1 work, a plurality of fluorescent tubes 13 of this back light unit 12 are in normal bright state, to provide light to this display panels 10.
This display panels 10 reception drive signal waveform figure as shown in Figure 3 are with display frame.Under these time schedule controller 18 controls, this scanner driver 14 produces a plurality of sweep signals 102 in a frame time T, and this sweep signal 102 is applied on this sweep trace 101, and wherein, it is a frame time T that this sweep signal 102 is applied to the 101 used times of this sweep trace.Be that example is described with sweep trace G2 now, when this sweep signal 102 was applied on this sweep trace G2, a plurality of thin film transistor (TFT)s 107 that this sweep trace G2 connects were in opening.
Under these time schedule controller 18 controls, this data driver 16 provides a plurality of data-signals (figure does not show) to be applied on this multi-column data line 103, and this data-signal is a high voltage.During this sweep trace G2 is applied in this sweep signal 102, this data-signal is applied to a plurality of pixel electrodes 105 by the source electrode and the drain electrode of the conducting of a plurality of thin film transistor (TFT)s 107 of being connected with this sweep trace G2, makes a plurality of pixel cell 108 display frames and keeps the data-signal of this frame.
Before next frame sweep signal 104 is applied to this sweep trace G2, is positioned at 108 the loaded data signals of a plurality of pixel cells that are connected with this sweep trace G2 and remains unchanged.
When next frame scan signal 104 is applied to this sweep trace G2, make a plurality of thin film transistor (TFT)s 107 that are connected this sweep trace G2 be in opening, simultaneously, this data driver 16 applies the next frame data-signal to this sweep trace G2, then, the next frame data-signal source electrode and the drain electrode of the conducting by a plurality of thin film transistor (TFT)s 107 of being connected with this sweep trace G2 respectively is applied to a plurality of pixel electrodes 105, and the former data-signal that a plurality of pixel cells 108 are loaded is updated to the next frame data-signal.
Yet, show same picture if this display panels 10 is long-time, when switching to next picture, can be on residual on this display panels 10 image information of a picture, promptly so-called image residue.Its reason is: be the example explanation with this sweep trace G2 still, this sweep signal 102 be applied to after this sweep trace G2 next frame sweep signal 104 be applied to this sweep trace G2 before during this period of time in, the thin film transistor (TFT) 107 that this sweep trace G2 is connected ends, when switching to the next frame picture, the data-signal that keeps previous frame in the pixel cell 108 that this thin film transistor (TFT) 107 is connected can't disengage rapidly by this thin film transistor (TFT) 107, make between the pixel electrode 105 of these a plurality of pixel cells 108 and the public electrode 109 and produce offset voltage, this offset voltage will influence the pixel cell demonstration of next frame, thereby cause the phenomenon of image residue.
Summary of the invention
In order to solve the residual problem of LCD image in the prior art, the invention provides a kind of driving method that can effectively eliminate the LCD of image residue.
A kind of driving method of LCD, adopt the LCD of this driving method to comprise a display panels and a plurality of light source, this display panels comprises one scan driver, time schedule controller and fine scanning line, these a plurality of light sources are controlled by an inverter, this driving method comprises the steps: that in a certain frame time this time schedule controller is controlled this scanner driver and produced sweep signal; This time schedule controller controls this inverter and opens or cut out these a plurality of light sources in turn, when a certain light source is opened, sweep trace that should the light source irradiation district is applied the single pass signal successively, and when this light source was closed, its corresponding scanning beam was applied in the single pass signal at least again; In time, repeat above step at next frame.
Compared with prior art, in the driving method of the present invention, this scanner driver produces at least twice sweep signal at a frame time, these these a plurality of light sources of time schedule controller control are opened in proper order or are closed, under this sweep signal effect, the data-signal that is kept at each pixel cell can in time disengage by the thin film transistor (TFT) of corresponding conducting, variation can not take place in these a plurality of pixel cells, the demonstration of this frame does not have influence on the demonstration of next frame, the driving method of these a plurality of light sources is opened or is closed in cooperation in proper order, the displays image information mistake that the observer can not experienced under at least twice sweep signal effect and occur is so can effectively solve the image residue problem.
Description of drawings
Fig. 1 is a kind of synoptic diagram of LCD of prior art.
Fig. 2 is the driving circuit synoptic diagram of LCD shown in Figure 1.
Fig. 3 is the drive signal waveform figure of LCD shown in Figure 1.
Fig. 4 is the synoptic diagram of LCD of the present invention.
Fig. 5 is the driving circuit synoptic diagram of LCD shown in Figure 4.
Fig. 6 is the drive signal waveform figure of LCD shown in Figure 4.
Embodiment
Seeing also Fig. 4, is the perspective exploded view of LCD 2 of the present invention.This LCD 2 comprises a display panels 20 and a back light unit 22.This display panels 20 and these back light unit 22 superimposed settings.
Seeing also Fig. 5 again, is the driving circuit synoptic diagram of LCD 2 shown in Figure 4.This display panels 20 comprises one scan driver 24, a data driver 26, time schedule controller 28, the sweep trace 201 that multirow is parallel to each other, data line 203, a plurality of pixel electrode 205, a plurality of thin film transistor (TFT) 207 and a plurality of public electrode 209 that multiple row is parallel to each other.This sweep trace 201 and this data line 203 are arranged in a crossed manner and define a plurality of pixel cells 208, this pixel electrode 205 is arranged in the pixel cell 208 that this sweep trace 201 and this data line 203 defined with matrix structure, and this public electrode 209 is oppositely arranged with this pixel electrode 205.
This back light unit 22 comprises an inverter 25 and a plurality of fluorescent tube that is arranged in parallel 23, and this fluorescent tube 23 is a cathode fluorescent tube.
This time schedule controller 28 is connected with this scanner driver 24, this data driver 26 and this inverter 25 respectively, and provides first, second control signal and backlight control signal to control this scanner driver 24, this data driver 26 and this inverter 25 respectively; This scanner driver 24 drives this sweep trace 201, and this data driver 26 drives this data line 203, and this inverter 25 drives this fluorescent tube 23; The grid that is positioned at each thin film transistor (TFT) 207 of this sweep trace 201 and these data line 203 infalls is connected to one scan line 201, the source electrode of each thin film transistor (TFT) 207 is connected to a data line 203, and the drain electrode of each thin film transistor (TFT) 207 is connected to a pixel electrode 205.
When these LCD 2 work, these a plurality of fluorescent tubes 23 are under this inverter 25 drives, and order is opened or closed.When each fluorescent tube 23 is opened, the light that is penetrated by this each fluorescent tube 23 forms a clear zone 210 on this display panels 20, the sweep trace 201 of these clear zone 210 corresponding somes, and this moment, other fluorescent tube 23 was in closed condition, the corresponding dark space 213 that forms on this display panels 20.
Seeing also Fig. 6, is the drive signal waveform figure of above-mentioned LCD 2.Be 600 now with these sweep trace 201 line numbers, these fluorescent tube 23 numbers are 10 to describe the driving method of this LCD 2 for example, wherein in this drive signal waveform figure, " G1～G600 " is the oscillogram of sweep signal, and " L1～L10 " is the oscillogram of backlight control signal.The driving method of present embodiment is described below:
A. this time schedule controller 28 provides first control signal to control this scanner driver 24 and produce sweep signal 202 and sweep signal 204 for the first time for the second time in a frame time T, and this time schedule controller 28 provides second control signal to control this data driver 26 and produces a plurality of data-signals.
Wherein, this first time sweep signal 202 to be applied to the used time of sweep trace G1～G600 be a frame time T.
B. this time schedule controller 28 provides backlight control signal to control this inverter 25 and opens first fluorescent tube 23, the light of its ejaculation forms a clear zone 210 on this display panels 20, this clear zone 210 corresponding sweep trace G1～G60, apply this sweep signal 202 simultaneously to this sweep trace G1～G60, and these a plurality of data-signals are applied to this multi-column data line 203 first time.
Be that example is described now with sweep trace G2, during this sweep trace G2 is applied in this of sweep signal 202 first time, the a plurality of thin film transistor (TFT)s 207 that are connected this sweep trace G2 all are in opening, promptly, be connected the drain electrode and the source electrode conducting of a plurality of thin film transistor (TFT)s 207 of this sweep trace G2, these a plurality of data-signals are applied to a plurality of pixel electrodes 205 by a plurality of thin film transistor (TFT)s 207 of conducting respectively, and this sweep trace G2 is positioned at clear zone 210, make a plurality of pixel cells 208 realize that images show.In order to realize that image shows, the opening time of this first fluorescent tube 23 should with this first time sweep signal 202 consistent by the time that sweep trace G1 is applied to sweep trace G60, and this, sweep signal 202 was T60/600=T/10 by the time that sweep trace G1 is applied to sweep trace G60 first time, that is, the opening time of this first fluorescent tube 23 is T/10.Similarly, the opening time of other fluorescent tube 23 also is T/10.
C. this backlight control signal is controlled this inverter 25 and is closed first fluorescent tube 23, open second fluorescent tube 23, sweep trace G1～G60 region at this display panels 20 forms a dark space 213, form a clear zone 210 in sweep trace G61～G120 region, apply this sweep signal 202 simultaneously first time on this sweep trace G61～G120, apply this sweep signal 204 second time on this sweep trace G1～G60.
When this, sweep signal 204 was applied to this sweep trace G2 second time, make a plurality of thin film transistor (TFT)s 207 conductings that are connected this sweep trace G2, thereby make a plurality of pixel cells 208 disengage data-signal fast by the thin film transistor (TFT) 207 of conducting, because this moment, this sweep trace G2 was positioned at dark space 213, the observer can not experience viewing area, this sweep trace G2 place and information errors occur.For avoiding occurring information errors, this, sweep signal 204 must apply when being dark space 213 in sweep trace G1～G60 region second time, promptly correspondingly this first fluorescent tube 23 is closed after, apply, thus this first time sweep signal 202 with sweep signal interval time of 204 this second time must greater than or equal T/10 at least.
D. by that analogy, sweep trace G121～G600 is identical with step c with the driving method of the 3rd fluorescent tube 23 to the tenth fluorescent tubes 23, thereby finishes the display driver of this frame.
E. next frame repeats above operation.
In the above-mentioned driving method, because being applied to the data-signal of these a plurality of pixel cells 208 can in time disengage, even these a plurality of pixel cells 208 are for a long time under a data-signal effect, also can variations not take place at these a plurality of pixel cells 208, make the demonstration of this frame not have influence on the demonstration of next frame.Again owing to apply this during sweep signal 204 second time, this sweep trace G1～G60 region is dark space 213, the observer can't experience these dark space 213 display frame information and mistake occur, can effectively solve the image residue problem so the driving method of these a plurality of fluorescent tubes 23 is opened or closed in sweep signal 204 cooperations second time that increase in a frame in proper order.
This scanner driver 24 also can produce the sweep signal more than twice in a frame time T, promptly, this scanner driver also can produce sweep signal, the 4th sweep signal for the third time in embodiment of the present invention ..., however the interval time of two adjacent sweep signals must be more than or equal to T/10.The sweep signal number of times that produces in a frame time T the more, the thin film transistor (TFT) 207 conducting number of times that are connected this fine scanning line 201 the more, the data-signal of a plurality of pixel cells of feasible correspondence disengages better effects if by the thin film transistor (TFT) 207 of this conducting, therefore can more effective solution image residue problem.
In addition, when the number of scanning lines and fluorescent tube number change, correspondingly adjust the backlight drive signal that produces by this time schedule controller and interval time of sweep signal repeatedly.When fluorescent tube 23 numbers were k (k 〉=1), each 23 opening time of fluorescent tube was that interval time of T/k and two adjacent sweep signals is more than or equal to T/k.
Used each fluorescent tube 23 can be replaced by other linear light source or the pointolite that can form linear light source in the foregoing description, as the light emitting diode of a plurality of series connection.Utilize the light emitting diode of a plurality of series connection of this each row of inverter 25 controls to open or close, on this display panels 20, form a clear zone 210 and dark space 213 accordingly, and under the cooperation of at least twice sweep signal, also can solve the image residue problem effectively.
Compared to prior art, in the driving method of the present invention, this scanner driver 24 produces repeatedly sweep signal at a frame time T, these a plurality of fluorescent tube 23 orders of these time schedule controller 28 controls are opened or are closed, under sweep signal effect repeatedly, the data-signal that is kept at each pixel cell 208 can in time disengage by the thin film transistor (TFT) 207 of corresponding conducting, variation can not take place in these a plurality of pixel cells 208, the demonstration of this frame does not have influence on the demonstration of next frame, the driving method of the light emitting diode of these a plurality of fluorescent tubes 23 or a plurality of series connection is opened or is closed in cooperation in proper order, the observer can not experienced under sweep signal effect repeatedly and the displays image information mistake that occurs, so can effectively solve the image residue problem.
Claims (7)
1. the driving method of a LCD, it is characterized in that: adopt the LCD of this driving method to comprise a display panels and a plurality of light source, this display panels comprises one scan driver, time schedule controller and fine scanning line, these a plurality of light sources are controlled by an inverter, and this driving method comprises the steps:
A. in a certain frame time, this time schedule controller is controlled this scanner driver and is produced sweep signal;
B. this time schedule controller controls this inverter and opens or cut out these a plurality of light sources in turn, when a certain light source is opened, sweep trace that should the light source irradiation district is applied the single pass signal successively, and when this light source was closed, its corresponding scanning beam was applied in the single pass signal at least again;
C. at next frame in the time, repeating step a, b.
2. the driving method of LCD as claimed in claim 1, it is characterized in that: this light source is a cathode fluorescent tube.
3. the driving method of LCD as claimed in claim 1, it is characterized in that: this light source is a light emitting diode.
4. the driving method of LCD as claimed in claim 1, it is characterized in that: the number of this light source is k, and a frame time is T, and be T/k the interval time of per two adjacent sweep signals.
5. the driving method of LCD as claimed in claim 1, it is characterized in that: the number of this light source is k, and a frame time is T, and the interval time of per two adjacent sweep signals is greater than T/k.
6. the driving method of LCD as claimed in claim 1, it is characterized in that: the number of this light source is k, and a frame time is T, and the opening time of each light source is T/k.
7. the driving method of LCD as claimed in claim 1, it is characterized in that: the zero-time that this first time, sweep signal was applied on this fine scanning line is consistent with the unlatching zero-time of first light source of these a plurality of light sources.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101570309A CN101192380B (en) | 2006-11-24 | 2006-11-24 | Driving method of liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101570309A CN101192380B (en) | 2006-11-24 | 2006-11-24 | Driving method of liquid crystal display |
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| Publication Number | Publication Date |
|---|---|
| CN101192380A true CN101192380A (en) | 2008-06-04 |
| CN101192380B CN101192380B (en) | 2010-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2006101570309A Expired - Fee Related CN101192380B (en) | 2006-11-24 | 2006-11-24 | Driving method of liquid crystal display |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102595181A (en) * | 2012-03-08 | 2012-07-18 | 深圳市华星光电技术有限公司 | Three-dimensional display device and display control method thereof |
| CN102750922A (en) * | 2012-07-05 | 2012-10-24 | 青岛海信电器股份有限公司 | Method and device for driving liquid crystal display, and liquid crystal television |
| CN102959965A (en) * | 2010-07-19 | 2013-03-06 | 惠普发展公司，有限责任合伙企业 | Three-dimensional imaging |
| CN103576323A (en) * | 2012-07-26 | 2014-02-12 | 瀚宇彩晶股份有限公司 | Bare stereoscopic image displaying method |
| CN110322827A (en) * | 2019-08-15 | 2019-10-11 | 云谷（固安）科技有限公司 | A kind of digital driving method and display panel of display panel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003280600A (en) * | 2002-03-20 | 2003-10-02 | Hitachi Ltd | Display device, and its driving method |
-
2006
- 2006-11-24 CN CN2006101570309A patent/CN101192380B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102959965A (en) * | 2010-07-19 | 2013-03-06 | 惠普发展公司，有限责任合伙企业 | Three-dimensional imaging |
| CN102595181A (en) * | 2012-03-08 | 2012-07-18 | 深圳市华星光电技术有限公司 | Three-dimensional display device and display control method thereof |
| CN102595181B (en) * | 2012-03-08 | 2016-05-11 | 深圳市华星光电技术有限公司 | 3 d display device and display control method thereof |
| CN102750922A (en) * | 2012-07-05 | 2012-10-24 | 青岛海信电器股份有限公司 | Method and device for driving liquid crystal display, and liquid crystal television |
| CN102750922B (en) * | 2012-07-05 | 2015-07-01 | 青岛海信电器股份有限公司 | Method and device for driving liquid crystal display, and liquid crystal television |
| CN103576323A (en) * | 2012-07-26 | 2014-02-12 | 瀚宇彩晶股份有限公司 | Bare stereoscopic image displaying method |
| CN110322827A (en) * | 2019-08-15 | 2019-10-11 | 云谷（固安）科技有限公司 | A kind of digital driving method and display panel of display panel |
| CN110322827B (en) * | 2019-08-15 | 2022-05-10 | 成都辰显光电有限公司 | Digital driving method of display panel and display panel |
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| Publication number | Publication date |
|---|---|
| CN101192380B (en) | 2010-09-29 |
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