CN101872593A - Liquid crystal display device and control method thereof - Google Patents
Liquid crystal display device and control method thereof Download PDFInfo
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- CN101872593A CN101872593A CN200910301797A CN200910301797A CN101872593A CN 101872593 A CN101872593 A CN 101872593A CN 200910301797 A CN200910301797 A CN 200910301797A CN 200910301797 A CN200910301797 A CN 200910301797A CN 101872593 A CN101872593 A CN 101872593A
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Abstract
The invention relates to a liquid crystal display device and a control method thereof. The liquid crystal display device comprises a plurality of scanning lines, a plurality of data lines, a plurality of pixel circuits, a scanning driver, a data driver and a time sequence controller. The data driver respectively outputs a plurality of data signals alternatively representing reset picture and pixel picture to the data lines. The time sequence controller outputs a starting signal, an odd-number clock signal and an even-number clock signal. The scanning driver respectively outputs a plurality of scanning signals to the scanning lines, controls the time of pulse of the scanning signal sequentially occurring according to the starting signal, controls the pulse width of the scanning signal of the corresponding odd-number scanning line according to the odd-number clock signal, and controls the pulse width of the scanning signal of the corresponding even-number scanning lines according to the even-number clock signal, so the data signal can be written in the pixel circuit.
Description
Technical field
The present invention relates to a kind of liquid crystal indicator and control method thereof, be meant the liquid crystal indicator and the control method thereof of a kind of employing pulsed (impulsetype) type of drive especially.
Background technology
Liquid crystal indicator because have that external form is thin, in light weight, power consumption is low, radiation is low and can with advantage such as manufacture of semiconductor technical compatibility, and be widely used in various Modern Electronic equipment.Yet, liquid crystal is the material with viscosity, this causes the reaction time of liquid crystal indicator longer usually, add that liquid crystal indicator adopts stable state (hold type) type of drive usually, therefore, when liquid crystal indicator is used for the dynamic image demonstration, cause the smear phenomenon because reaction velocity is fast inadequately easily, influence the dynamic image quality.
In order to solve the smear phenomenon of liquid crystal indicator when dynamic image shows, present research is to adopt the pulsed drive mode mostly, promptly between two adjacent image frames, insert a black picture, make image frame and black picture alternately be shown, for example No. the 6693618th, United States Patent (USP) and No. 6947034 are disclosed.This technology can make the gray scale variation between the picture more obvious, shortens the reaction time of liquid crystal indicator by this, to improve its dynamic image quality.
Summary of the invention
Therefore, purpose of the present invention promptly is to provide a kind of liquid crystal indicator that adopts the pulsed drive mode.
Liquid crystal indicator of the present invention comprises many sweep traces that be arranged in parallel, many and the vertically disposed data line of these sweep traces, a plurality ofly separates the image element circuit, that defines and be matrix distribution by these sweep traces and these data lines and be electrically connected to the time schedule controller that data driver and that these scanner drivers of retouching pipeline purging, one are electrically connected to these data lines is electrically connected to this scanner driver.Wherein, this data driver is exported a plurality of data-signals respectively to these data lines, and these data-signals are alternately represented replacement picture and image frame; This time schedule controller is exported an initial signal, an odd number clock signal and an even number clock signal to this scanner driver; This scanner driver is exported a plurality of sweep signals respectively and is retouched pipeline purging to these, and control the time that these sweep signals begin to occur in regular turn pulse according to this start signal, be output to the pulse width of these sweep signals of odd-numbered scan lines in these sweep traces according to this odd number clock signal control, with the pulse width that is output to these sweep signals of even-line interlace line in these sweep traces according to this even number clock signal control, so that these data-signals are written into these image element circuits.
Liquid crystal indicator of the present invention is controlled these sweep signals by this scanner driver according to this start signal, this odd number clock signal and this even number clock signal, can alternately show replacement picture and image frame, to improve its dynamic image quality.
And another object of the present invention is for providing a kind of control method that can reach the liquid crystal indicator of pulsed drive mode.
The control method of liquid crystal indicator of the present invention applies to one and comprises many sweep traces that be arranged in parallel, many and the vertically disposed data line of these sweep traces and a plurality ofly separate the liquid crystal indicator that defines and be the image element circuit of matrix distribution by these sweep traces and these data lines.The control method of this liquid crystal indicator may further comprise the steps:
(A) provide an initial signal, an odd number clock signal and an even number clock signal;
(B) according to this start signal, this odd number clock signal and this even number clock signal, produce a plurality of sweep signals that are suitable for to be outputed to respectively these sweep traces, wherein, be to control the time that these sweep signals begin to occur in regular turn pulse according to this start signal, control pulse width that is output to these sweep signals of odd-numbered scan lines in these sweep traces and the pulse width that is output to these sweep signals of even-line interlace line in these sweep traces according to this even number clock signal control according to this odd number clock signal; With
(C) provide and be applicable to a plurality of data-signals that outputed to these data lines respectively, wherein, these data-signals are alternately represented replacement picture and image frame.
The control method of liquid crystal indicator of the present invention is by controlling these sweep signals according to this start signal, this odd number clock signal and this even number clock signal, can make this liquid crystal indicator alternately show replacement picture and image frame, to improve its dynamic image quality.
Description of drawings
Fig. 1 is a circuit diagram, and first preferred embodiment of liquid crystal indicator of the present invention is described.
Fig. 2 is an oscillogram, and the relation between an initial signal, an odd number clock signal, an even number clock signal and a plurality of sweep signal and these signals of first preferred embodiment is described.
Fig. 3 is an oscillogram, and a video data of first preferred embodiment is described, and the relation between video data, odd number clock signal, even number clock signal and the sweep signal.
Fig. 4 is a circuit diagram, and second preferred embodiment of liquid crystal indicator of the present invention is described.
Fig. 5 is an oscillogram, one first initial subsignal, one second initial subsignal, one first odd number clock subsignal, one second odd number clock subsignal, one first even number clock subsignal, one second even number clock subsignal and a plurality of sweep signal of second preferred embodiment are described, and the relation between these signals.
Fig. 6 is an oscillogram, and a video data of second preferred embodiment is described, and the relation between video data, the first odd number clock subsignal, the second odd number clock subsignal, the first even number clock subsignal, the second even number clock subsignal and the sweep signal.
Fig. 7 is an oscillogram, and the video data of second preferred embodiment and the relation between the sweep signal are described.
Fig. 8 is a process flow diagram, and the preferred embodiment of the control method of liquid crystal indicator of the present invention is described.
Embodiment
Consult Fig. 1, first preferred embodiment of liquid crystal indicator 1 of the present invention comprises many sweep traces that be arranged in parallel 11, many and sweep trace 11 vertically disposed data lines 12, a plurality ofly separates the time schedule controller 16 that data driver 15 and that scanner driver 14, that the image element circuit 13, that defines and be matrix distribution is electrically connected to sweep trace 11 is electrically connected to data line 12 is electrically connected to scanner driver 14 and data driver 15 by sweep trace 11 and data line 12.
The image element circuit 13 that is positioned at same row is electrically connected to identical sweep trace 11, and the image element circuit 13 that is positioned at delegation is electrically connected to identical data line 12.Each image element circuit 13 comprises a thin film transistor (TFT) 131 and a liquid crystal capacitance 132, and wherein, thin film transistor (TFT) 131 has a source electrode and the drain electrode that a grid, that is electrically connected to corresponding sweep trace 11 is electrically connected to corresponding data line 12; Liquid crystal capacitance 132 has second end that first end and that is electrically connected to the drain electrode of thin film transistor (TFT) 131 receives a common electric voltage.Each image element circuit 13 is subjected to the signal controlling on the corresponding sweep trace 11, with when thin film transistor (TFT) 131 conductings, the signal on the corresponding data line 12 is delivered to liquid crystal capacitance 132.
The one video data DATA that alternately represents replacement picture and image frame is to data driver 15 in time schedule controller 16 output, and exports an initial signal STV, an odd number clock signal CKV O and an even number clock signal CKV E to scanner driver 14.Data driver 15 converts video data DATA the data-signal D1～Dq of a plurality of simulations to, and distinguishes outputting data signals D1～Dq to data line 12.Scanner driver 14 is exported a plurality of sweep signal G1～Gp respectively to sweep trace 11, and the time that begins to occur in regular turn pulse according to start signal STV gated sweep signal G1～Gp, the sweep signal that is output to odd-numbered scan lines according to odd number clock signal CKV O control (for example: G1, G3, G5 ...) pulse width and the sweep signal that is output to the even-line interlace line according to even number clock signal CKV E control (for example: G2, G4, G6 ...) pulse width.
In the present embodiment, scanner driver 14 comprises one scan driver 141.Scanner driver 141 receives start signal STV, odd number clock signal CKV O and even number clock signal CKV E, and produces sweep signal G1～Gp in view of the above.It should be noted that scanner driver 141 can be that thin film transistor (TFT) 131 with image element circuit 13 is formed on the same glass substrate (figure does not show), but also can be an integrated circuit independently.
Consult Fig. 1 and Fig. 2, in a picture cycle T, start signal STV has a first initial pulse 21 and one second initial pulse 22; Odd number clock signal CKV O has a plurality of first time clock 23 and a plurality of second clock pulse 24, and wherein the rising source of one first time clock 23 appear at that the first initial pulse 21 of start signal STV occurs during, wherein the rising edge of a second clock pulse 24 appear at that second initial pulse 22 of start signal STV occurs during; Even number clock signal CKV E has a plurality of the 3rd time clock 25 and a plurality of the 4th time clock 26; The appearance that circulates in regular turn of first to fourth time clock 23～26; Each sweep signal G1～Gp has one first scanning impulse 27 and one second scanning impulse 28.
Consult Fig. 3, video data DATA first time clock 23 of odd number clock signal CKV O occur during and the 3rd time clock 25 of even number clock signal CKV E occur during represent the replacement picture, as oblique line partly shown in; And the second clock pulse 24 of odd number clock signal CKV O occur during and the 4th time clock 26 of even number clock signal CKV E occur during represent image frame, shown in blank parts, first scanning impulse 27 of sweep signal G1～Gp can make the replacement picture be written into image element circuit 13 whereby, second scanning impulse 28 of sweep signal G1～Gp can make image frame be written into image element circuit 13, therefore, present embodiment liquid crystal indicator 1 can alternately show replacement picture (for example: black picture or grey picture) and image frame, to improve its dynamic image quality.
It should be noted that, first scanning impulse 27 of sweep signal G1～Gp will equate not necessarily that with the width of second scanning impulse 28 (first time clock 23 that is odd number clock signal CKV O not necessarily will equate with the width of second clock pulse 24, the 3rd time clock 25 of even number clock signal CKV E not necessarily will equate with the width of the 4th time clock 26), apparent weight is put picture and is written into required time of image element circuit 13 and image frame and is written into the 13 required times of image element circuit and decides.
Consult Fig. 4, second preferred embodiment of liquid crystal indicator 3 of the present invention comprises many sweep traces that be arranged in parallel 31, many and sweep trace 31 vertically disposed data lines 32, a plurality ofly separates the time schedule controller 36 that data driver 35 and that scanner driver 34, that the image element circuit 33, that defines and be matrix distribution is electrically connected to sweep trace 31 is electrically connected to data line 32 is electrically connected to scanner driver 34 and data driver 35 by sweep trace 31 and data line 32.
The image element circuit 33 that is positioned at same row is electrically connected to identical sweep trace 31, and the image element circuit 33 that is positioned at delegation is electrically connected to identical data line 32.Each image element circuit 33 comprises a thin film transistor (TFT) 331 and a liquid crystal capacitance 332, and wherein, thin film transistor (TFT) 331 has a source electrode and the drain electrode that a grid, that is electrically connected to corresponding sweep trace 31 is electrically connected to corresponding data line 32; Liquid crystal capacitance 331 has second end that first end and that is electrically connected to the drain electrode of thin film transistor (TFT) 331 receives a common electric voltage.Each image element circuit 33 is subjected to the signal controlling on the corresponding sweep trace 31, with when thin film transistor (TFT) 331 conductings, the signal on the corresponding data line 32 is delivered to liquid crystal capacitance 332.
In the present embodiment, scanner driver 34 comprises one first scanner driver 341 and one second scanner driver 342.First scanner driver 341 receives the first initial subsignal STV1, the first odd number clock subsignal CKVO1 and the first even number clock subsignal CKVE1, second scanner driver 342 receives the second initial subsignal STV2, the second odd number clock subsignal CKVO2 and the second even number clock subsignal CKVE2, and first scanner driver 341 and second scanner driver 342 produce sweep signal G1～Gp together according to the signal that receives separately.It should be noted that first scanner driver 341 and second scanner driver 342 can be that thin film transistor (TFT) 331 with image element circuit 33 is formed on the same glass substrate (figure does not show), but also can be integrated circuit independently.
Consult Fig. 4 and Fig. 5, in a picture cycle T, the first initial subsignal STV1 has a first initial pulse 41; The second initial subsignal STV2 has one second initial pulse 42; The first odd number clock subsignal CKVO1 has a plurality of first time clock 43, and wherein the rising edge of one first time clock 43 appear at that the first initial pulse 41 of the first initial subsignal STV1 occurs during; The second odd number clock subsignal CKVO2 has a plurality of second clock pulses 44, and the rising edge of a wherein second clock pulse 44 appear at that second initial pulse 42 of the second initial subsignal STV2 occurs during; The first even number clock subsignal CKVE1 has a plurality of the 3rd time clock 45; The second even number clock subsignal CKVE2 has a plurality of the 4th time clock 46; The appearance that circulates in regular turn of first to fourth time clock 43～46; Each sweep signal G1～Gp has one first scanning impulse 47 and one second scanning impulse 48.
Consult Fig. 6, first scanning impulse 47 and second scanning impulse 48 at sweep signal G1～Gp do not have under the overlapping situation, the i.e. second clock pulse 44 of first time clock 43 of the first odd number clock subsignal CKVO1 and the second odd number clock subsignal CKVO2 does not have overlapping, the 4th time clock 46 of the 3rd time clock 45 of the first even number clock subsignal CKVE1 and the second even number clock subsignal CKVE2 does not have overlapping, video data DATA first time clock 43 of the first odd number clock subsignal CKVO1 occur during and the 3rd time clock 45 of the first even number clock subsignal CKVE1 occur during represent the replacement picture, as oblique line partly shown in; And the second clock pulse 44 of the second odd number clock subsignal CKVO2 occur during and the 4th time clock 46 of the second even number clock subsignal CKVE2 occur during represent image frame, shown in blank parts; First scanning impulse 47 of sweep signal G1～Gp can make the replacement picture be written into image element circuit 33 whereby, second scanning impulse 48 of sweep signal G1～Gp can make image frame be written into image element circuit 33, therefore, present embodiment liquid crystal indicator 3 can alternately show replacement picture and image frame, to improve its dynamic image quality, wherein, the replacement picture is black picture or grey picture.
Consult Fig. 6 and Fig. 7, shown in Fig. 7 (a)～Fig. 7 (c), first scanning impulse 47 and second scanning impulse 48 at sweep signal G1～Gp do not have under the overlapping situation, first scanning impulse 47 of sweep signal G1～Gp not necessarily will equate with the width of second scanning impulse 48, promptly first time clock 43 of the first odd number clock subsignal CKVO1 not necessarily will equate with the width of the second clock pulse 44 of the second odd number clock subsignal CKVO2, the 3rd time clock 45 of the first even number clock subsignal CKVE1 not necessarily will equate with the width of the 4th time clock 46 of the second even number clock subsignal CKVE2, and apparent weight is put picture and is written into required time of image element circuit 33 and image frame and is written into the 33 required times of image element circuit and decides.
In addition, shown in Fig. 7 (d), first scanning impulse 47 and second scanning impulse 48 of sweep signal G1～Gp can be to overlap, the i.e. second clock pulse 44 of first time clock 43 of the first odd number clock subsignal CKVO1 and the second odd number clock subsignal CKVO2 is overlapped, the 4th time clock 46 of the 3rd time clock 45 of the first even number clock subsignal CKVE1 and the second even number clock subsignal CKVE2 is overlapped, in this case, video data DATA first scanning impulse 47 of sweep signal G1～Gp occur during represent the replacement picture, promptly first time clock 43 of the first odd number clock subsignal CKVO1 occur during and the 3rd time clock 45 of the first even number clock subsignal CKVE1 occur during represent the replacement picture, and do not represent image frame with first scanning impulse, 47 overlapped period at second scanning impulse 48 of sweep signal G1～Gp, the i.e. second clock pulse 44 of the second odd number clock subsignal CKVO2 not with the 4th time clock 46 of first time clock, 43 overlapped period of the first odd number clock subsignal CKVO1 and the second even number clock subsignal CKVE2 not with the 3rd time clock 45 overlapped period of the first even number clock subsignal CKVE1, by this during partly overlapping, the image element circuit 43 that is about to be written into image frame can be by precharge, further to shorten the reaction time of present embodiment liquid crystal indicator 3.
Consult Fig. 8, the preferred embodiment of the control method of liquid crystal indicator of the present invention uses one to comprise many sweep traces that be arranged in parallel, many and the vertically disposed data line of sweep trace and a plurality of liquid crystal indicator that is defined and be the image element circuit of matrix distribution by sweep trace and data line separation.The control method of present embodiment liquid crystal indicator may further comprise the steps:
Detailed relation between start signal, odd number clock signal, even number clock signal, sweep signal and the data-signal can no longer be added explanation herein with reference to first preferred embodiment and second preferred embodiment of above-mentioned liquid crystal indicator.
In sum, the foregoing description comes the gated sweep signal by start signal, odd number clock signal and even number clock signal, can make liquid crystal indicator alternately show replacement picture and image frame (being the pulsed drive mode), to improve its dynamic image quality, so can reach purpose of the present invention really.
Claims (10)
1. liquid crystal indicator, it comprises that the data line of multi-strip scanning line, many and this multi-strip scanning line insulation and a plurality of image element circuit, that is defined by this multi-strip scanning line and these many data lines are electrically connected to the time schedule controller that data driver and that these many scanner drivers, of retouching pipeline purging are electrically connected to these many data lines is electrically connected to this scanner driver, it is characterized in that: this data driver is exported a plurality of data signals respectively to these many data lines, and these a plurality of data signals are alternately represented replacement picture and image frame; This time schedule controller is exported an initial signal, an odd number clock signal and an even number clock signal to this scanner driver; This scanner driver is exported a plurality of sweep signals respectively and is retouched pipeline purging to these many, and control the time that this multi-strip scanning signal begins to occur in regular turn pulse according to this start signal, be output to the pulse width of these a plurality of sweep signals of odd-numbered scan lines in this multi-strip scanning line according to this odd number clock signal control, with the pulse width that is output to these a plurality of sweep signals of even-line interlace line in this multi-strip scanning line according to this even number clock signal control, so that these data-signals are written into this a plurality of image element circuits.
2. liquid crystal indicator as claimed in claim 1 is characterized in that: this scanner driver comprises the one scan driver, and this scanner driver receives this start signal, this odd number clock signal and this even number clock signal, and produces these sweep signals in view of the above.
3. liquid crystal indicator as claimed in claim 2, it is characterized in that: in a picture cycle, this start signal has a first initial pulse and one second initial pulse, this odd number clock signal has a plurality of first time clock and a plurality of second clock pulse, this even number clock signal has a plurality of the 3rd time clock and a plurality of the 4th time clock, and each sweep signal has one first scanning impulse and one second scanning impulse.
4. liquid crystal indicator as claimed in claim 3, it is characterized in that: in this picture cycle, one rising edge in first time clock of this odd number clock signal appear at that the first initial pulse of this start signal occurs during, one rising edge in the second clock pulse of this odd number clock signal appear at that second initial pulse of this start signal occurs during.
5. liquid crystal indicator as claimed in claim 3 is characterized in that: the appearance that circulates in regular turn of the 3rd time clock of first time clock of this odd number clock signal, second clock pulse and this even number clock signal, the 4th time clock.
6. liquid crystal indicator as claimed in claim 5, it is characterized in that: this scanner driver is controlled the time that first scanning impulse of these a plurality of sweep signals begins to occur in regular turn according to the first initial pulse of this start signal, control the time that second scanning impulse of these a plurality of sweep signals begins to occur in regular turn according to second initial pulse of this start signal, be output to the width of first scanning impulse of these a plurality of sweep signals of these many odd-numbered scan lines according to the width control of first time clock of this odd number clock signal, be output to the width of second scanning impulse of these sweep signals of these many odd-numbered scan lines according to the width control of the second clock pulse of this odd number clock signal, be output to according to the width control of the 3rd time clock of this even number clock signal these many even-line interlace lines this a plurality of sweep signals first scanning impulse width and control the width of second scanning impulse of these a plurality of sweep signals that are output to these many even-line interlace lines according to the width of the 4th time clock of this even number clock signal.
7. liquid crystal indicator as claimed in claim 6, it is characterized in that: these data signals first time clock of this odd number clock signal occur during and the 3rd time clock of this even number clock signal occur during represent the replacement picture, and the second clock pulse of this odd number clock signal occur during and the 4th time clock appearance of this even number clock signal during represent image frame.
8. liquid crystal display device control method, it comprises:
One initial signal, an odd number clock signal and an even number clock signal are provided;
According to this start signal, this odd number clock signal and this even number clock signal, generation is applicable to a plurality of sweep signals that outputed to the multi-strip scanning line respectively, wherein, be to control the time that these a plurality of sweep signals begin to occur in regular turn pulse according to this start signal, control pulse width that is output to these a plurality of sweep signals of odd-numbered scan lines in this multi-strip scanning line and the pulse width that is output to these sweep signals of even-line interlace line in this multi-strip scanning line according to this even number clock signal control according to this odd number clock signal;
Provide to be applicable to a plurality of data signals that outputed to many data lines respectively, wherein, these a plurality of data signals are alternately represented replacement picture and image frame.
9. liquid crystal display device control method as claimed in claim 8, it is characterized in that: in a picture cycle, this start signal has a first initial pulse and one second initial pulse, this odd number clock signal has a plurality of first time clock and a plurality of second clock pulse, this even number clock signal has a plurality of the 3rd time clock and a plurality of the 4th time clock, and each sweep signal has one first scanning impulse and one second scanning impulse.
10. liquid crystal display device control method as claimed in claim 9, it is characterized in that: in this picture cycle, one rising edge in first time clock of this odd number clock signal appear at that the first initial pulse of this start signal occurs during, one rising edge in the second clock pulse of this odd number clock signal appear at that second initial pulse of this start signal occurs during.
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| CN200910301797A CN101872593A (en) | 2009-04-24 | 2009-04-24 | Liquid crystal display device and control method thereof |
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| CN200910301797A CN101872593A (en) | 2009-04-24 | 2009-04-24 | Liquid crystal display device and control method thereof |
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| CN103985346A (en) * | 2014-05-21 | 2014-08-13 | 上海天马有机发光显示技术有限公司 | TFT array substrate, display panel and display substrate |
| CN104238224A (en) * | 2013-06-07 | 2014-12-24 | 元太科技工业股份有限公司 | Display panel and method for manufacturing the same |
| WO2015101028A1 (en) * | 2013-12-31 | 2015-07-09 | 京东方科技集团股份有限公司 | Gip type liquid crystal display device |
| CN106020561A (en) * | 2016-03-09 | 2016-10-12 | 友达光电股份有限公司 | Touch control display device |
| CN107731150A (en) * | 2017-11-30 | 2018-02-23 | 武汉天马微电子有限公司 | Scanning circuit, driving method thereof and display panel |
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| US10140938B2 (en) | 2013-12-31 | 2018-11-27 | Boe Technology Group Co., Ltd. | GIP type liquid crystal display device |
| WO2015101028A1 (en) * | 2013-12-31 | 2015-07-09 | 京东方科技集团股份有限公司 | Gip type liquid crystal display device |
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| CN111710273A (en) * | 2019-03-18 | 2020-09-25 | 群创光电股份有限公司 | Display device |
| CN111710273B (en) * | 2019-03-18 | 2023-12-08 | 群创光电股份有限公司 | Display apparatus |
| WO2021056857A1 (en) * | 2019-09-24 | 2021-04-01 | 深圳市华星光电半导体显示技术有限公司 | Driver circuit, driving method thereof and display panel applying same |
| CN110706671A (en) * | 2019-09-24 | 2020-01-17 | 深圳市华星光电半导体显示技术有限公司 | Driving circuit, driving method thereof and display panel applied by driving circuit |
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