CN100351893C - Liquid crystal display driven by dual unilateral scanning and its driving method - Google Patents
Liquid crystal display driven by dual unilateral scanning and its driving method Download PDFInfo
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- CN100351893C CN100351893C CNB2005100041820A CN200510004182A CN100351893C CN 100351893 C CN100351893 C CN 100351893C CN B2005100041820 A CNB2005100041820 A CN B2005100041820A CN 200510004182 A CN200510004182 A CN 200510004182A CN 100351893 C CN100351893 C CN 100351893C
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000004973 liquid crystal related substance Substances 0.000 title abstract description 12
- 230000009977 dual effect Effects 0.000 title 1
- 239000003990 capacitor Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000003860 storage Methods 0.000 description 5
- 230000004913 activation Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
A liquid crystal display driven by double-single side scanning and a driving method thereof. The liquid crystal display comprises a pixel, a data line, a first scanning driver, a second scanning driver, a first scanning line and a second scanning line. The pixel has a first switch and a second switch. The control end of the first switch is electrically connected with the first scanning line, and the control end of the second switch is electrically connected with the second scanning line. The first scanning driver is positioned at one side of the pixel and electrically connected with the first scanning line. The second scanning driver is positioned at the other side of the pixel and is electrically connected with the second scanning line. The first scan driver and the second scan driver respectively drive the first scan line and the second scan line at the same timing. The data line is electrically connected with the first switch and the second switch and used for transmitting image data to the pixel.
Description
Technical field
The relevant a kind of Liquid Crystal Display And Method For Driving of the present invention, and the Liquid Crystal Display And Method For Driving of particularly relevant a kind of double-single side scan driving.
Background technology
Figure 1A is the calcspar of the LCD of traditional single side scan driving.LCD 100 comprises data driver 130, scanner driver 120 and panel 110.Data driver 130 has a plurality of data lines L, to transmit image data to panel 110.Scanner driver 120 has a plurality of sweep traces G, drives with the side from panel 110.Have a plurality of pixels 112 in the panel 110, electrically connect with corresponding sweep trace G and respective data lines L respectively with arranged.When the corresponding sweep trace G activation of a pixel 112, this pixel 112 can receive image data and shows according to this from respective data lines L.
Figure 1B is the schematic equivalent circuit of pixel 112.Pixel 112 comprises transistor Q, reaches display unit.Display unit is to represent with liquid crystal capacitance Clc and storage capacitors Cst at this.The grid of transistor Q is to electrically connect with corresponding sweep trace G, and its source electrode is to electrically connect with liquid crystal capacitance Clc and storage capacitors Cst, and its drain electrode is to electrically connect with respective data lines L.When scanner driver 120 triggers a pulse signal P with sweep trace G of activation, make all crystals pipe Q conducting on this sweep trace G.When transistor Q conducting, the image data on the data driver 130 will be delivered to liquid crystal capacitance Clc and storage capacitors Cst by transistor Q.
Above-mentioned LCD 100 is to use known single side scan type of drive, that is to say, uses a scanner driver 120, from a side drive panel 110.Yet, owing to have resistance and stray capacitance etc. on the sweep trace G, so pulse signal P can produce decay when sweep trace G transmits, be commonly referred to as gate delay (gatedelay).
Please refer to Fig. 2, it illustrates and is the transmission of the signal on sweep trace G synoptic diagram.Head end at sweep trace G, as the point of the A on the panel, its pulse signal P that sees is good square wave, but arrived sweep trace G end, as the B point, its pulse signal P ' that sees promptly produces gate delay, causes serious distortion, the duration of charging deficiency of the pixel of feasible end, and influence picture quality.
Thin film transistor (TFT) becomes the moment that ends in conducting, because the effect of parasitic capacitance of thin film transistor (TFT) causes a generation that recalcitrates voltage (Feed through voltage) to make the voltage of pixel electrode reduce.When gate delay serious more, terminal pixel recalcitrate that voltage is more for a short time to cause that to recalcitrate the distribution of current potential on panel more inhomogeneous, and then influence picture quality.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of Liquid Crystal Display And Method For Driving, can reach the gate delay of improving LCD, and promote the purpose of the quality of shown dynamic image.
Propose the LCD that a kind of double-single side scan drives according to an aspect of the present invention, comprise pixel, first sweep trace, second sweep trace, data line, one first scanner driver and one second scanner driver.This pixel comprises one first switch and a second switch.First sweep trace and first switch electrically connect.Second sweep trace and second switch electrically connect.Data line and this first switch and second switch electrically connect, in order to transmit an image data to this pixel.First scanner driver is positioned at a side of pixel, electrically connects with first sweep trace.Second scanner driver is positioned at the opposite side of pixel, electrically connects with second sweep trace; Wherein, this first scanner driver is to drive this first sweep trace and this second sweep trace respectively with identical sequential with this second scanner driver.
A kind of double-single side scan driving method is proposed according to a further aspect in the invention.At first, utilize first scanner driver and second scanner driver to export one first pulse signal and one second pulse signal simultaneously respectively, with this first switch of conducting and this second switch respectively to this first sweep trace and this second sweep trace.Then, utilize data driver exporting an image data, and transfer to this first switch and this second switch to data line.Then, via first switch and second switch image data is imported display unit respectively.
For above-mentioned purpose of the present invention, characteristics and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. is elaborated as follows:
Description of drawings
Figure 1A (known techniques) is the calcspar of the LCD of traditional single side scan driving.
Figure 1B (known techniques) is the schematic equivalent circuit of pixel.
Fig. 2 is the online signal transmission synoptic diagram of scanning.
Fig. 3 A is the calcspar that drives LCD according to a kind of double-single side scan of a preferred embodiment of the present invention.
Fig. 3 B is the schematic equivalent circuit of the pixel of present embodiment.
Fig. 4 is the signal transmission synoptic diagram on sweep trace G1 and the G2.
Fig. 5 is the reparation synoptic diagram of sweep trace of the damage of present embodiment.
Fig. 6 is the layout of a pixel of present embodiment.
Embodiment
Please refer to Fig. 3 A, it is the calcspar that drives LCD according to a kind of double-single side scan of a preferred embodiment of the present invention.LCD 300 comprises data driver 330, scanner driver 320 and 322 and panel 310.Data driver 330 has a plurality of data lines L, to transmit image data to panel 310. Scanner driver 320 and 322 has a plurality of sweep traces G1 and a plurality of sweep traces G2 respectively, and the both sides from panel 310 drive respectively.Panel 310 has a plurality of pixels 312 with arranged, electrically connects with respective data lines L and corresponding sweep trace G1 and G2 respectively.When the corresponding scanning line G1 of a pixel 312 or G2 activation, this pixel 312 can receive image data and shows according to this from respective data lines L.
Fig. 3 B is the schematic equivalent circuit of the pixel 312 of present embodiment.Each pixel 312 comprises two switches, liquid crystal capacitance Clc and storage capacitors Cst at least.Switch is transistor Q1 and Q2.Transistor Q1 is a common and corresponding data line L electric connection with first end (source electrode or drain electrode) of Q2, and its second end (drain electrode or source electrode) is common and liquid crystal capacitance Clc and storage capacitors Cst electric connection.The control end of transistor Q1 (grid) is to electrically connect with a corresponding sweep trace G1, to be controlled by scanner driver 320; The control end of transistor Q2 (grid) is to electrically connect with a corresponding sweep trace G2, to be controlled by scanner driver 322.That is to say that pixel 312 is to accept the control of scanner driver 320 and 322 simultaneously, as long as one of its corresponding scanning line G1 and G2 are to be enabled to receive the image data of data line L.
Be controlled by pulse signal S1 and S2 ' simultaneously in A ' pixel 312, though the therefore serious distortion of pulse signal S2 ', this pixel 312 still can have the sufficient duration of charging according to pulse signal S1.Similarly, be to be controlled by pulse signal S1 ' and S2 simultaneously in B ' pixel 312, though the therefore serious distortion of pulse signal S1 ', this pixel 312 still can have the sufficient duration of charging according to pulse signal S2.Therefore, the pixel that drives the end of panel at the double-single side scan of present embodiment does not have the panel that traditional single side scan drives the gate delay phenomenon, make the problem of duration of charging deficiency, and and then improve the voltage problem pockety on panel that recalcitrates that stray capacitance caused because of thin film transistor (TFT).
Except above-mentioned solution gate delay, the advantage that the present invention also has easy reparation sweep trace to damage.If the sweep trace of the panel that traditional single side scan drives is words of having broken and be not easy to repair, and makes some pixel on the panel to show.Please refer to Fig. 5, it is the reparation synoptic diagram of sweep trace of the damage of present embodiment.Suppose sweep trace G1 for damaging, in D place open circuit, even so, the panel of present embodiment still can normal operation, can't be scanned the pixel that line G1 driven and still can be scanned line G2 driving.In addition, also can be with the mode of laser welding with sweep trace G1 and G2 short circuit, as utilize metal wire W1 and W2 among the figure, make the pixel of these row use bilateral turntable driving, and still can reach good display quality.
The 3rd advantage of the present invention is can reduce in the manufacture process, the influence that the light shield skew is caused.Fig. 6 is the layout of a pixel of present embodiment.If make the light shield skew of the source/drain of transistor Q1 and Q2, such as to moving down, then the grid of transistor Q2 and the capacitor C gs2 between the source electrode are owing to the area change that coincides of grid and source electrode becomes big greatly.But because the grid of transistor Q1 and the capacitor C gs1 between the source electrode thereby minimizing, the Cgs electric capacity of pixel is the summation of the Cgs2 of the Cgs1 of transistor Q1 and transistor Q2 again, so the Cgs of this pixel still can keep certain value, thereby reduce the harmful effect that the light shield skew is produced.
In sum; though the present invention discloses as above with a preferred embodiment; yet it is not in order to limit the present invention; any person skilled in the art person; without departing from the spirit and scope of the present invention; when the variation that can do various equivalences or replacement, so protection scope of the present invention is when looking accompanying being as the criterion that the application's claim scope defined.
Claims (9)
1. the LCD that drives of a double-single side scan comprises:
Pixel has first switch and second switch;
First sweep trace electrically connects with this first switch;
Second sweep trace electrically connects with this second switch;
Data line electrically connects with this first switch and second switch, in order to transmit image data to this pixel;
One first scanner driver is positioned at a side of this pixel, electrically connects with this first sweep trace; And
One second scanner driver is positioned at the opposite side of this pixel, electrically connects with this second sweep trace;
Wherein, this first scanner driver is to drive this first sweep trace and this second sweep trace respectively with identical sequential with this second scanner driver.
2. LCD as claimed in claim 1 is characterized in that also comprising a data driver, electrically connects with this data line.
3. LCD as claimed in claim 1 is characterized in that this pixel also has a pixel electrode.
4. LCD as claimed in claim 3, it is characterized in that this first switch has one first end, one second end and a control end, the control end of this first switch is coupled to this first sweep trace, first end of this first switch is coupled to this data line, and second end of this first switch is coupled to this pixel electrode.
5. LCD as claimed in claim 3, it is characterized in that this second switch has one first end, one second end and a control end, the control end of this second switch is coupled to this second sweep trace, first end of this second switch is coupled to this data line, and second end of this second switch is coupled to this pixel electrode.
6. LCD as claimed in claim 1 is characterized in that when this first sweep trace damages, with homonymy one terminal shortcircuit of this first sweep trace and this second sweep trace.
7. LCD as claimed in claim 6 is characterized in that when this second sweep trace damages, also with the homonymy other end short circuit of this first sweep trace and this second sweep trace.
8. a double-single side scan driving method is used for the described display of claim 1, and this driving method comprises:
Export one first pulse signal and one second pulse signal simultaneously respectively to this first sweep trace and this second sweep trace, with difference this first switch of conducting and this second switch; And
Transmit an image data to this first switch and this second switch.
9. driving method as claimed in claim 8 is characterized in that transmitting this image data step and comprises:
By a data driver to export this image data to this data line; And
Transmit this image data to this first switch and this second switch by this data line.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100041820A CN100351893C (en) | 2005-01-06 | 2005-01-06 | Liquid crystal display driven by dual unilateral scanning and its driving method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100041820A CN100351893C (en) | 2005-01-06 | 2005-01-06 | Liquid crystal display driven by dual unilateral scanning and its driving method |
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| CN1632853A CN1632853A (en) | 2005-06-29 |
| CN100351893C true CN100351893C (en) | 2007-11-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110992912A (en) * | 2019-12-27 | 2020-04-10 | 厦门天马微电子有限公司 | Array substrate, display panel and display device |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8866804B2 (en) | 2011-04-29 | 2014-10-21 | Shenzhen China Star Optoelectronics Technology, Co. Ltd. | Pixel structure and a driving method thereof |
| CN102184717A (en) * | 2011-04-29 | 2011-09-14 | 深圳市华星光电技术有限公司 | Pixel structure and driving method thereof |
| CN105374333B (en) * | 2015-12-11 | 2018-06-29 | 深圳市华星光电技术有限公司 | Display panel and gate driving framework |
| CN107958653B (en) | 2016-10-18 | 2021-02-02 | 京东方科技集团股份有限公司 | Array substrate, driving method thereof, driving circuit and display device |
| CN107315295A (en) * | 2017-07-31 | 2017-11-03 | 广东欧珀移动通信有限公司 | Array base palte, display panel and electronic equipment |
| CN107238989A (en) * | 2017-07-31 | 2017-10-10 | 广东欧珀移动通信有限公司 | Array base palte, display panel and electronic equipment |
| CN107300814B (en) * | 2017-07-31 | 2023-10-13 | Oppo广东移动通信有限公司 | Array substrate, display panel and electronic equipment |
| CN107452335B (en) * | 2017-09-22 | 2019-11-26 | 深圳市华星光电半导体显示技术有限公司 | A kind of pixel-driving circuit and driving method, OLED display panel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09189897A (en) * | 1995-11-07 | 1997-07-22 | Semiconductor Energy Lab Co Ltd | Active matrix type liquid crystal display device and driving method therefor |
| EP0964383A1 (en) * | 1998-06-11 | 1999-12-15 | Fujitsu Limited | Methods and circuitry for driving a plasma display panel |
| US6243064B1 (en) * | 1995-11-07 | 2001-06-05 | Semiconductor Energy Laboratory Co., Ltd. | Active matrix type liquid-crystal display unit and method of driving the same |
| CN1363080A (en) * | 2000-02-02 | 2002-08-07 | 精工爱普生株式会社 | Method for driving electrooptical device, driving circuit, and electrooptical device, and electronic apparatus |
| TW548476B (en) * | 1999-12-01 | 2003-08-21 | Chi Mei Optoelectronics Corp | Liquid crystal display module, scanning method of liquid crystal panel and its scan circuit board |
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2005
- 2005-01-06 CN CNB2005100041820A patent/CN100351893C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09189897A (en) * | 1995-11-07 | 1997-07-22 | Semiconductor Energy Lab Co Ltd | Active matrix type liquid crystal display device and driving method therefor |
| US6243064B1 (en) * | 1995-11-07 | 2001-06-05 | Semiconductor Energy Laboratory Co., Ltd. | Active matrix type liquid-crystal display unit and method of driving the same |
| EP0964383A1 (en) * | 1998-06-11 | 1999-12-15 | Fujitsu Limited | Methods and circuitry for driving a plasma display panel |
| TW548476B (en) * | 1999-12-01 | 2003-08-21 | Chi Mei Optoelectronics Corp | Liquid crystal display module, scanning method of liquid crystal panel and its scan circuit board |
| CN1363080A (en) * | 2000-02-02 | 2002-08-07 | 精工爱普生株式会社 | Method for driving electrooptical device, driving circuit, and electrooptical device, and electronic apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110992912A (en) * | 2019-12-27 | 2020-04-10 | 厦门天马微电子有限公司 | Array substrate, display panel and display device |
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