CN100386795C - Display panel and driving method - Google Patents

Display panel and driving method Download PDF

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Publication number
CN100386795C
CN100386795C CNB2004100708149A CN200410070814A CN100386795C CN 100386795 C CN100386795 C CN 100386795C CN B2004100708149 A CNB2004100708149 A CN B2004100708149A CN 200410070814 A CN200410070814 A CN 200410070814A CN 100386795 C CN100386795 C CN 100386795C
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data
signal
group
image data
pulse wave
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CN1725284A (en
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白凤霆
李思明
邹贤文
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Hannstar Display Corp
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Hannstar Display Corp
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Abstract

The present invention relates to a display panel which comprises a plurality of data lines, a plurality of scanning lines, a display array, a data driver, and a scan driver, wherein image data with preset quantity are divided into at least one group and are inserted with preset data by the data driver, and each image datum corresponds to a scanning line. The first group of the scanning lines are orderly driven by the scan driver according to the first starting pulse wave, and the first group of the image data are written into a display unit of the first group of the scanning lines by the data driver through the data lines. After a period of certain time, the first group of the scanning lines are driven by the scan driver according to the second starting pulse wave, and the preset data are simultaneously written into the display unit of the first group of the scanning lines by the data driver through the data lines.

Description

Display panel and driving method
Technical field
The invention relates to a kind of display panel, particularly, be applicable to LCD, with the image overlapping problem of two picture frames before and after solving, to reduce the blooming of picture relevant for a kind of display panel.
Background technology
Generally speaking, (liquid crystal display LCD) has the structure that shows array to LCD, and shows that each display unit in the array has thin film transistor (TFT).The shown image of LCD has the ability of preferable contrast and wide linear GTG.In addition, LCD has right angle demonstration, low power consumption, reaches advantages such as hanging down radiation, can both allow the user enjoy best visual environment, and the development of LCD technology just in time suits user's demand.Along with user's demand, the size of liquid crystal display increases day by day, and development large scale liquid crystal display is important subject under discussion.
Fig. 1 is the structural representation of the known LCD of expression.LCD1 has Low Voltage Differential Signal (lowvoltage differential signaling, LVDS) module 10, memory storage 11, time schedule controller 12 and panel 13.Panel 13 has data driver 14, scanner driver 15, shows array 16, multi-strip scanning line G 0To G nAnd many data line D 0To D mShow that array 16 is made of parallel crisscross data line and sweep trace at least in twos, each data line and sweep trace that interlocks then forms a display unit (Display unit pixel), for example data line D at least 0With sweep trace G 0Corresponding display unit 16a.
LVDS module 10 receives image data and provides data actuating signal, vertical synchronizing signal, horizontal-drive signal and clock signal to time schedule controller 12.In addition, LVDS module 10 exports image data to memory storage 11.
According to data actuating signal, vertical synchronizing signal, horizontal-drive signal and clock signal, time schedule controller 12 provides data-signal to data driver 14, and provides sweep signal to scanner driver 15.When scanner driver 15 drove the thin film transistor (TFT) that shows the display unit in the array 16, data driver 14 saw through data line D 0To D mData-signal is sent to demonstration array 16.Memory storage 11 also receives the data-signal from time schedule controller 12 except receiving the image data from LVDS module 10.According to image data and data-signal, memory storage 11 provides odd number signal and even signal, to drive the data-signal at data driver 14.
Fig. 2 is the sequential chart of the known LCD of expression.Scanner driver 15 provides grid signal SG in regular turn according to sweep signal 1To SG nTo sweep trace G 0To G n, and make with only opening one lists the thin film transistor (TFT) of all display units in a flash, and close the thin film transistor (TFT) that other lists all display units.And when the thin film transistor (TFT) of a row display unit was all opened, 14 of data drivers were via data line D 0To D m, send corresponding data signal SD 1To the display unit of these row.When scanner driver 15 is finished once the scanning motion of all sweep traces, i.e. the display action of single picture frame (frame) is finished in expression.Therefore, each sweep trace of multiple scanning and send data-signal SD 1To SD n, just can reach the purpose of show image.
In known LCD, because the liquid crystal response time, when the data-signal of news frame became new data-signal, the image of last picture frame overlapped with the image of back one picture frame, promptly has the phenomenon of image towing.Fig. 3 is the variation synoptic diagram of the show state of expression one display unit.With display unit 16a is example, and during news frame F1, display unit 16a has the accurate DL1 of data bit.Next, during news frame F2, display unit 16a has the accurate DL2 of data bit.As shown in the figure, display unit 16a is converted to the accurate DL2 of data bit by the accurate DL1 of data bit to postpone, and has caused the blooming of picture.Therefore, this phenomenon has then influenced LCD in the application that shows dynamic menu.
Summary of the invention
In view of this, in order to address the above problem, fundamental purpose of the present invention is to provide a kind of display panel, is applicable to LCD.
For obtaining above-mentioned purpose, the present invention proposes a kind of display panel.This display panel comprises many data lines, multi-strip scanning line, shows array, data driver and scanner driver.Show that array has a plurality of display units, corresponding one group of staggered data line and the sweep trace of each display unit.Data driver is that the image data with predetermined quantity is divided at least one group and inserts preset data, and the corresponding one scan line of each image data.Scanner driver be according to the first initial pulse wave driving the sweep trace of first group in regular turn, and data driver sees through data line, the image data of first group write to the display unit of the sweep trace of first group respectively.Scanner driver through behind the given time be according to the second initial pulse wave driving the sweep trace of first group, and data driver sees through data line, preset data write to simultaneously the display unit of the sweep trace of first group.
Description of drawings
Fig. 1 represents the structural representation of known LCD.
Fig. 2 represents the sequential chart of known LCD.
Fig. 3 represents the variation synoptic diagram of the show state of a display unit.
Fig. 4 represents the structural representation of display panels of the present invention.
Fig. 5 represents the sequential chart of LCD of the present invention.
Fig. 6 represents the pairing control signal view of remainder data segments of the present invention.
Symbol description:
1～LCD; 10～LVDS module; 11～memory storage; 12～time schedule controller; 13～panel; 14～data driver; 15～scanner driver; 16～demonstration array; 16a～display unit; G 0... G n～sweep trace; D 0... D m～data line;
4～panel; 40～data driver; 41～scanner driver; 42～demonstration array; 400...403～driver element; D4 0... D4 m～data line; G40 0... G40 3, G41 0... G41 3, G42 0... G42 3, G43 0... G43 3～sweep trace;
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:
In order to solve the shortcoming of known technology, show that at display unit an image of interrogating frame behind a given time, makes display unit show black or white picture or arbitrary single grey menu, up to the picture that shows next picture frame.Thus, the image of front and back two picture frames can not overlap, and has reduced the blooming of picture.
Fig. 4 is the structural representation of expression display panels of the present invention.Panel 4 comprises data driver 40, scanner driver 41 and shows array 42.Data driver 40 control data line D4 0To D4 mScanner driver 41 has a plurality of driver elements, as driver element 400 to 403, and driver element 400 gated sweep line G40 0To G40 3, driver element 401 gated sweep line G41 0To G41 3, driver element 402 gated sweep line G42 0To G42 3, driver element 403 gated sweep line G43 0To G43 3What pay special attention to is, in fact each driver element is controlled 200 sweep traces at least, and for convenience of description, so each driver element refers to that with 4 sweep traces be example in Fig. 4.Show that array 42 has a plurality of display units, and each display unit corresponding staggered data line and sweep trace, for example, data line D4 0With sweep trace G40 0Corresponding display unit 42a.
Scanner driver 41 receives grid clock signal CPV, beginning vertical signal STV and output enabling signal OE1 to OE4.Wherein, output enabling signal OE1 provides to driver element 400, output enabling signal OE2 and provides to driver element 401, by that analogy.Each output enabling signal has two kinds of waveform OE_D and OE_B.
Data driver 40 receives data-signal D4 and load signal Load.Wherein, data-signal D4 is divided into a plurality of data segments, and each data segments is the display unit of a corresponding sweep trace, and set quantity data section is defined as a group, and in a group, insert black, white or arbitrary single luma data section.In an embodiment of the present invention, be promptly to insert the black data section every four data sections, be a group promptly, and in this group, insert the black data section with four data sections.
Consult Fig. 4 and Fig. 5, for instance, data segments S40 0To S40 3Be the P1 of group, and the corresponding sweep trace G40 of difference 0To G40 3On display unit, and at data segments S40 2With S40 3Between insert black data section B 42.In addition, load signal Load is the display unit that each section is loaded on corresponding scanning line among the indicated number number of the it is believed that D4.In addition, have two pulse wave DS and BS among the beginning vertical signal STV, wherein, pulse wave DS is that indication begins to carry out data segments and is loaded on sweep trace G40 0To G40 3On display unit during (after this claiming first program), and this moment output enabling signal OE1 be waveform OE_D; And pulse wave BS to be indication begin to carry out the black data section and be loaded on sweep trace G40 0To G40 3On display unit during (after this claiming second program), and this moment output enabling signal OE1 be waveform OE_B.
Consult Fig. 5, when vertical signal STV has pulse wave DS, by driver element 400 beginnings, according to the rising edge of grid clock signal CPV and the waveform OE_D of output enabling signal OE1, sweep trace G40 0To G40 3Be driven in regular turn; And data driver 40 is according to load signal Load, with data segments S40 0To S40 3Go into to be loaded onto sweep trace G40 in order respectively 0To G40 3On display unit.Next, for driver element 401, with data segments S41 0To S41 3Go into to be loaded onto sweep trace G41 respectively 0To G41 3On display unit.Here be noted that, because in data-signal D4, per four data sections insert a black data section, therefore, the waveform OE_D of output enabling signal OE1 is in the part of corresponding black data section B 42, be the high levels of keeping the long period, be loaded on sweep trace G40 to cover this black data section 0To G40 3On display unit.
Follow identical action and be executed in driver element 401 to 403 in regular turn, when video signal is loaded on display unit through a given time t BKAfter, vertical signal STV has pulse wave BS, to begin to carry out second program.In an embodiment of the present invention, be the sweep trace G42 that is controlled when driver element 402 0To G42 3On display unit begin to receive in regular turn data segments S42 0To S42 3The time, vertical signal STV has pulse wave BS.By driver element 400 beginnings, be a group with four sweep traces, according to the rising edge of grid clock signal CPV, sweep trace G40 0To G40 3Be driven in regular turn.Yet, because the waveform OE_B of output enabling signal OE1, make data segments S42 0To S42 3Be not to go into to be loaded onto sweep trace G40 in order respectively 0To G40 3On display unit, and when the waveform OE_B of enabling signal OE1 was low level, black data section B 40 once was loaded on sweep trace G40 0To G40 3On display unit.Next, be one group with four sweep traces, the black data section once is loaded on all display units of one group of sweep trace, and in order the black data section is loaded on each group sweep trace.After the sweep trace of driver element 400 is finished this action, carry out by driver element 401 to 403 in regular turn.
According to the present invention, when first program of execution, the sweep trace of a group is to be driven in order, and data segments also is to be loaded on the sweep trace that has driven in order.After first program is carried out a given time, begin the sweep trace of same group is carried out second program, be the multi-strip scanning line display unit that the black data block is loaded on simultaneously this group.In addition, first program is carried out simultaneously with the sweep trace of second program pin to different groups.
The pulse wave DS of beginning vertical signal STV of the present invention and the given time between BS be t at interval BK, be to decide, but for display frame correctly and keep the sequential of rule, given time is t at interval according to the characteristic of display panels BKNeed all to receive the time of data segments greater than pairing all display units of driver element.In addition, in the present invention, each data segments is the display unit of a corresponding sweep trace, and the image input format is a group with X data section, and promptly a group is corresponding X bar sweep trace.In addition, in a group, insert black or white data section.Therefore, in order to keep data-driven and to insert the relation of black (in vain) chromatic number according to section, the optimal images input format, total number of scanning lines just is necessary for the multiple of X.
According to embodiments of the invention, be to be a group with four data sections, therefore, the optimal images input format is 4 multiple, if the image input format non-be 4 multiple, then in the data segments of remainder in the pairing time, the waveform OE_D of enabling signal OE1 and OE_B, grid clock signal CPV and load signal Load are in halted state, promptly keep previous state, the position that promptly maintains originally is accurate, as choosing place of Fig. 6 centre circle.Consult Fig. 6, during R, the waveform OE_D of enabling signal OE1 and OE_B, grid clock signal CPV and load signal Load keep original state.
Consult Fig. 5, according to the present invention, when first program, the judgement of data segments polarity is during the pulse wave DS of vertical signal STV, and being the determining positions according to the pulse wave DS relative polarity signal of vertical signal STV, is example with Fig. 5, in N picture frame, pulse wave DS is with respect to the positive polarity of signal POL, thus the polarity of data segments be judged as "+-+-... "; And in the N+1 picture frame, pulse wave DS is with respect to the negative polarity of signal POL, thus the polarity of data segments be judged as "+-+... ".In second program, the judgement of black data section polarity is the polar signal POL setting according to the waveform OE_B correspondence of enabling signal, the black data section can carry out the both positive and negative polarity switching during the pulse wave BS of vertical signal STV simultaneously, as choosing place of figure centre circle, in N picture frame, waveform OE_B is corresponding to waveform POL_N, so the black data section is a negative polarity; And in N+1 picture frame, waveform OE_B is corresponding to waveform POL_P, so the black data section is a positive polarity.In other words, the polarity of data segments of the present invention be each bar scanning line transformation once, and the polarity of black data section be each lattice picture frame conversion once.
In sum, scanner driver of the present invention is to be a group and to insert a black or the white data section with X data section, and respectively this data segments and control signal, for example, the output relativeness of load signal Load, grid clock signal CPV, beginning vertical signal STV, output enabling signal OE and polar signal POL is fixed, wherein, this black or white data section can insert the optional position, right also translation relatively of above-mentioned respectively this control signal.By the black data section is loaded on display unit, so that the display unit show image becomes the demonstration black image behind given time, the image of two picture frames can not overlap before and after having avoided, and has reduced the blooming of picture.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking appended the claim scope person of defining.

Claims (18)

1. display panel comprises:
Many data lines;
The multi-strip scanning line;
One shows array, has a plurality of display units, corresponding one group of staggered this data line and the sweep trace of each this display unit;
One data driver is controlled described data line; And
The one scan driver is controlled described sweep trace;
Wherein, this data driver is that the image data with a predetermined quantity is divided at least one group and inserts a preset data in the image data of this group, and described image data is corresponding one scan line respectively; And
Wherein, this scanner driver is to drive the sweep trace of one first group in regular turn according to one first initial pulse wave, and this data driver sees through described data line, the image data of this first group is write to the display unit of the sweep trace of this first group respectively, this scanner driver is to drive the sweep trace of this first group according to one second initial pulse wave after through a given time, and this data driver sees through described data line, this preset data is write to simultaneously the display unit of the sweep trace of this first group.
2. display panel according to claim 1, wherein, respectively the relativeness between output of the image data of this group and control signal waveform is fixed.
3. display panel according to claim 2, wherein, this control signal comprises load signal (Load), grid clock signal (CPV), beginning vertical signal (STV), output enabling signal (OE) and polar signal (POL).
4. display panel according to claim 3, wherein, this first initial pulse wave is the image start signal pulse wave of beginning vertical signal, this second initial pulse wave is the initial pulse wave of preset data of beginning vertical signal.
5. display panel according to claim 4, wherein, the polarity of this image data judges it is to determine with the corresponding polar signal waveform position of the initial pulse wave of image data.
6. display panel according to claim 3, wherein, when the image data quantity of this data driver of input is non-when be the multiple of this predetermined number, the load signal of the image data correspondence of remainder, grid clock signal, output enabling signal all are maintained at accurate originally halted state.
7. display panel according to claim 1, wherein, this preset data is the image data of arbitrary single GTG.
8. display panel according to claim 7, wherein, this preset data is the image data of white picture or black picture.
9. display panel according to claim 1, wherein, the polarity of this preset data judges it is that polar signal waveform with the enabling signal correspondence decides, and carries out polar switching during the initial pulse wave of preset data of vertical signal at the beginning.
10. a driving method is applicable to a display panel, and this display panel comprises many data lines and multi-strip scanning line, and described sweep trace is grouped at least one first group in regular turn, and this driving method comprises:
The image data of one predetermined quantity is divided at least one group, and wherein, described image data is corresponding one scan line respectively;
In the image data of this group, insert a preset data;
According to one first initial pulse wave, drive the sweep trace of one first group in regular turn;
See through described data line, the image data of this group is write to a plurality of display units of the sweep trace of this first group respectively;
Through according to behind the given time, according to one second initial pulse wave to drive the sweep trace of this first group; And
See through described data line, this preset data is write to simultaneously the display unit of the sweep trace of this first group.
11. driving method according to claim 10, wherein, respectively the relativeness between output of the image data of this group and control signal waveform is fixed.
12. driving method according to claim 11, wherein, this control signal comprises load signal (Load), grid clock signal (CPV), beginning vertical signal (STV), output enabling signal (OE) and polar signal (POL).
13. driving method according to claim 12, wherein, this first initial pulse wave is the image start signal pulse wave of beginning vertical signal, and this second initial pulse wave is the initial pulse wave of preset data of beginning vertical signal.
14. driving method according to claim 13, wherein, the polarity of this image data judges it is to determine with the corresponding polar signal waveform position of the initial pulse wave of image data.
15. driving method according to claim 12, wherein, when image data quantity is non-when being the multiple of this predetermined number, the load signal of the image data correspondence of remainder, grid clock signal, output enabling signal all are maintained at the halted state of accurate position originally.
16. driving method according to claim 10, wherein, this preset data is the image data of arbitrary single GTG.
17. driving method according to claim 16, wherein, this preset data is the image data of white picture or black picture.
18. driving method according to claim 11, wherein, the polarity of this preset data judges it is that polar signal waveform with the enabling signal correspondence decides, and carries out polar switching during the initial pulse wave of preset data of vertical signal at the beginning.
CNB2004100708149A 2004-07-20 2004-07-20 Display panel and driving method Expired - Fee Related CN100386795C (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1251932A (en) * 1998-10-15 2000-05-03 国际商业机器公司 Display unit
CN1279459A (en) * 1999-06-15 2001-01-10 夏普公司 Liquid crystal display method and device for improving quality of cartooon pictures
US20020044117A1 (en) * 2000-08-24 2002-04-18 Tatsuya Matsumura Liquid crystal display device
US6396469B1 (en) * 1997-09-12 2002-05-28 International Business Machines Corporation Method of displaying an image on liquid crystal display and a liquid crystal display

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6396469B1 (en) * 1997-09-12 2002-05-28 International Business Machines Corporation Method of displaying an image on liquid crystal display and a liquid crystal display
CN1251932A (en) * 1998-10-15 2000-05-03 国际商业机器公司 Display unit
CN1279459A (en) * 1999-06-15 2001-01-10 夏普公司 Liquid crystal display method and device for improving quality of cartooon pictures
US20020044117A1 (en) * 2000-08-24 2002-04-18 Tatsuya Matsumura Liquid crystal display device

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