CN1532794A - Liquid crystal display device and its driving method - Google Patents
Liquid crystal display device and its driving method Download PDFInfo
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- CN1532794A CN1532794A CNA031074324A CN03107432A CN1532794A CN 1532794 A CN1532794 A CN 1532794A CN A031074324 A CNA031074324 A CN A031074324A CN 03107432 A CN03107432 A CN 03107432A CN 1532794 A CN1532794 A CN 1532794A
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Abstract
The present invention relates to one kind of LCD device and its driving method. A polar distribution controlling signal generating unit is used to generate polar distribution controlling signal output to the polar distribution data driver, and one aperiodic polar array is output to the display panel according to the polar distribution control signal to make pixel unit polarity in the panel in aperiodic distribution. Inside several frames, one half of the frames are complementary with the other half of the frame, that is to say, the polarity of all the pixel units in one half of the frames is opposite to that of all the pixel units in the other half of the frames.
Description
Technical field
The present invention relates to a kind of flat-panel screens, especially refer to a kind of LCD device and driving method thereof, it can be applicable to the source electrode driven integrated circuit (Source IC) or the time schedule controller of low temperature polycrystalline silicon (LTPS) Thin Film Transistor-LCD, and in the driving circuits such as the source electrode driven integrated circuit of Thin Film Transistor-LCD or time schedule controller.
Background technology
With the prosperity of work opto-electronics, flat-panel screens successfully replaces the cathode ray tube (CRT) screen.Present flat-panel screens can be finished by multiple different technology, for example: LCD (LCD), Thin Film Transistor-LCD (TFT-LCD) or organic electro-luminescent display (OLED), wherein, LCD and Thin Film Transistor-LCD mainly utilize bias voltage to control the Liquid Crystal Molecules Alignment direction, and then the control penetrability produces the color effect of GTG.
Yet, if use identical polar voltage to drive liquid crystal continuously, can make liquid crystal produce deformation inertia under permanent, make the display quality variation.The method of normal at present control polarity of voltage counter-rotating has many kinds, below will sketch common driving framework.Fig. 1 demonstration is divided into many picture blocks (Frame) with display panel 100, two wherein adjacent picture blocks 110,120,130,140 polarity is opposite, for example: the picture element 111 of picture block 110 polarity with the picture element 131 of the picture element 121 of picture block 120 and picture block 130 respectively is opposite, and the picture element 122 of picture block 120 polarity with the picture element 141 of the picture element 112 of picture block 110 and picture block 140 respectively is opposite.Because this kind practice is with picture block 110,120,130,140 is the basis, when vertical (Column) signal of display panel 100 is a time division multiplexing when driving, cross-talk (Crosstalk) effect then easily takes place if make the summation of the driving liquid crystal effective voltage of a certain polarity in the display panel 100 much larger than another polarity in specific picture (Pattern), be the phenomenon that certain regional picture has influence on adjacent domain brightness in the display panel 100, make the image quality variation.
Fig. 2 shows that the polarity with panel 200 is arranged in the in addition irregular practice of vertical direction (Data Line direction), and the polarity of two adjacent picture blocks is opposite, because (Row Line direction) is positive and negative adjacent arrangement in the horizontal direction, so when panel 200 longitudinal signals are the time division multiplexing driving, specific picture equally can take place if make the summation of the driving liquid crystal effective voltage of a certain polarity in the panel 200 much larger than another polarity, crosstalk effect then easily takes place, and makes the image quality variation.
Summary of the invention
A purpose of the present invention is to provide a kind of LCD device and driving method thereof, can reduce crosstalk effect, promotes image quality.
Another object of the present invention is to provide a kind of LCD device and driving method thereof, can reduce the situation of adjacent pictures block reversal of poles, to reach less electricity consumption.
For achieving the above object, the LCD device that the present invention proposes mainly comprises:
One display panel has plural picture element unit;
One scans the unit, connects this display panel by plural scanning linear, scans signal to these scanning linears for output, to control these picture element unit actions;
One polarity distribution control signal generating unit, in order to produce a polarity distribution control signal: and
One polarity distribution data driver, receive this polarity distribution control signal, and connect this display panel by plural data line, this polarity distribution data driver is exported one group of polarity arrangement non-periodic to these data lines, so that the polarity of these picture element unit is non-periodic distribution according to this polarity distribution control signal.
Described LCD device, wherein this polarity distribution data driver also comprises a plurality of samplings/maintenance temporary storage location, with the digital signal of picture element in the difference stored picture.
Described LCD device, wherein this polarity distribution data driver also comprises a plurality of samplings/maintenance temporary storage location, a plurality of digital/analog converter, a plurality of amplifier and a plurality of polarity selector, the output of these sampling/maintenance temporary storage locations is connected to the input end of these digital/analog converters, and the output of these digital/analog converters also is connected to the output terminal of these amplifiers, selects the signal of being exported of these amplifiers according to this polarity distribution control signal for these polarity selectors.
Described LCD device, wherein these amplifier output cathode signals or negative polarity signal.
Described LCD device, wherein this polarity distribution data driver also comprises a plurality of samplings/maintenance temporary storage location, a plurality of digital/analog converters, a plurality of polarity selectors and a plurality of amplifier, the output of these sampling/maintenance temporary storage locations is connected to the input end of these digital/analog converters, the output of these digital/analog converters then is connected directly to these polarity selectors, select the output signal of these digital/analog converters according to this polarity distribution control signal for these polarity selectors, then carry out processing and amplifying by these amplifiers again, to export these data lines to.
Described LCD device, when wherein this polarity distribution control signal generating unit and this polarity distribution data driver are also controlled this display panel and shown plural picture (hame), wherein there is in the picture of picture element unit polarity and second half quantity in the picture of half quantity picture element unit polarity opposite.
Described LCD device, wherein this display panel is a display panels.
The driving method of the LCD that the present invention proposes, in order to control a display panel polarity, this display panel has plural picture element unit, and this method mainly comprises the steps:
One sequential produces step, produces a polarity distribution control signal;
One chooses step, exports one group of polarity arrangement non-periodic according to this polarity distribution control signal; And
One Polarity Control step, export this polarity arrangement non-periodic to this display panel, polarity for this display panel picture element unit of control is no periodic array, and when controlling this display panel and showing plural picture (Frame), wherein there is in the picture of picture element unit polarity and second half quantity in the picture of half quantity picture element unit polarity opposite.
Described driving method, wherein this display panel is a display panels.
Description of drawings
Fig. 1 is the control picture element unit polarity synoptic diagram of known picture block for the basis.
Fig. 2 is the known line direction synoptic diagram of polarity distribution at random.
Fig. 3 is the configuration diagram of a preferred embodiment of the present invention.
Fig. 4 is the polarity distribution data internal drive synoptic diagram of a preferred embodiment of the present invention.
Fig. 5 is the action flow chart of a preferred embodiment of the present invention.
Fig. 6 is first synoptic diagram that the picture element unit polarity of a preferred embodiment of the present invention distributes.
Fig. 7 is second synoptic diagram that the picture element unit polarity of a preferred embodiment of the present invention distributes.
Fig. 8 is the 3rd synoptic diagram that the picture element unit polarity of a preferred embodiment of the present invention distributes.
Embodiment
Relevant preferred embodiment of the present invention, please be with reference to the configuration diagram of Fig. 3 demonstration, it comprises that mainly display panel 300, scanner unit 310, polarity distribution control signal produce main members such as (PATG) unit 320 and polarity distribution data driver (PPADD) 330.Wherein, display panel also comprises plural picture element unit 301.Scanner unit 310 connects the picture element unit 301 of display panel 300 by plural scanning linear 340, polarity distribution data driver 330 is by the picture element unit 301 of data line 350 connection display panels 300, for the polarity by polarity distribution data driver 330 these picture element unit 301 of control.In present embodiment, display panel 300 is preferably display panels, and scanner unit 310 is preferably gate drive integrated circuit (IC), and polarity distribution control signal generating unit 320 is preferably source electrode driven integrated circuit or time schedule controller.
Fig. 4 shows the detailed maps of polarity data driver 330, and it mainly comprises a plurality of samplings/maintenance working storage 331, a plurality of digital/analog converter (DAC) 332, a plurality of amplifier (OP) 333, reaches a plurality of polarity selectors 334.Polarity data driver 330 is by the digital signal of picture element in these sampling/maintenance working storage 331 temporary pictures, and digital/analog converter (DAC) 332 is for using positive polarity and the negative polarity signal that this digital signal is converted to simulation, the output of enhancing is provided by amplifier 333 again, wherein the output of these amplifiers 333 comprises positive polarity and negative polarity signal, 334 of these polarity selectors are selected wherein a kind of polarity according to polarity distribution control signal, with polarity arrangement non-periodic as output.These polarity selector 334 total plural numbers are planted configuration, and polarity selector 334 its polarity distribution control signals of different configuration have different corresponding relations with selected polarity.In present embodiment, the preferred number of these configurations is 16 groups.
Certainly, the input end of these above-mentioned polarity selectors also can directly be connected with the output terminal of these digital/analog converters 332, for the polar signal of selecting desire output earlier by polarity distribution control signal, carry out processing and amplifying via corresponding amplifier 333 again, to export one group of no periodic array to display panel 300.
The polarity of these picture element unit 301 of relevant controlling, would like to ask in the lump the synoptic diagram and the process flow diagram that show with reference to Fig. 3, Fig. 4 and Fig. 5, at first, polarity distribution control signal generating unit 320 produces one and has the polarity distribution control signal (PAC) of plural character, and exports them to polarity distribution data driver 330 (step S601).
After polarity distribution data driver 330 is received polarity distribution control signal, choose a wherein output (being positive signal or negative polarity signal) of amplifier 333 according to polarity distribution control signal, to become one group of no periodic array, and it is delivered to display panel 300, certainly, for a picture (Frame), the no periodic array that 330 outputs of polarity distribution data driver are plural time is to display panel, wherein, each time output no periodic array according to polarity distribution control signal difference (step S602).
301 of these picture element unit on the display panel 300 present acyclic polarity according to polarity arrangement non-periodic that receives and distribute, and polarity distribution control signal generating unit 320 and polarity distribution data driver are also controlled the shown within a certain period of time plural picture of 330 display panels 300, half picture wherein presents the polarity complementation with other half picture, for example: display panel 300 showed 240 pictures in 10 seconds, then must there be 120 pictures and other 120 pictures to be the polarity complementation, that is the polarity of all picture element unit 301 of the wherein picture in 240 pictures of polarity and the 2nd picture to the of all picture element unit 301 is opposite in the 1st picture, causes the problem (step S603) of power consumption to avoid every adjacent face just to reverse a polarity as far as possible.
Fig. 6, Fig. 7 and Fig. 8 are the utmost point distribution schematic diagram of picture element unit 301 on the display panel 300, no matter these picture element unit 301 all are non-periodic distribution at line direction or column direction, to reduce crosstalk effect, promote image quality.
The foregoing description is only given an example for convenience of description, and the interest field that the present invention advocated should be as the criterion so that claim is described certainly, but not only limits to the foregoing description.
Claims (9)
1, a kind of LCD device mainly comprises:
One display panel has plural picture element unit;
One scans the unit, connects this display panel by plural scanning linear, scans signal to these scanning linears for output, to control these picture element unit actions;
One polarity distribution control signal generating unit, in order to produce a polarity distribution control signal: and
One polarity distribution data driver, receive this polarity distribution control signal, and connect this display panel by plural data line, this polarity distribution data driver is exported one group of polarity arrangement non-periodic to these data lines, so that the polarity of these picture element unit is non-periodic distribution according to this polarity distribution control signal.
2, LCD device as claimed in claim 1 is characterized in that, wherein this polarity distribution data driver also comprises a plurality of samplings/maintenance temporary storage location, with the digital signal of picture element in the difference stored picture.
3, LCD device as claimed in claim 1, it is characterized in that, wherein this polarity distribution data driver also comprises a plurality of samplings/maintenance temporary storage location, a plurality of digital/analog converter, a plurality of amplifier and a plurality of polarity selector, the output of these sampling/maintenance temporary storage locations is connected to the input end of these digital/analog converters, and the output of these digital/analog converters also is connected to the output terminal of these amplifiers, selects the signal of being exported of these amplifiers according to this polarity distribution control signal for these polarity selectors.
4, LCD device as claimed in claim 3 is characterized in that, wherein these amplifier output cathode signals or negative polarity signal.
5, LCD device as claimed in claim 1, it is characterized in that, wherein this polarity distribution data driver also comprises a plurality of samplings/maintenance temporary storage location, a plurality of digital/analog converters, a plurality of polarity selectors and a plurality of amplifier, the output of these sampling/maintenance temporary storage locations is connected to the input end of these digital/analog converters, the output of these digital/analog converters then is connected directly to these polarity selectors, select the output signal of these digital/analog converters according to this polarity distribution control signal for these polarity selectors, then carry out processing and amplifying by these amplifiers again, to export these data lines to.
6, LCD device as claimed in claim 1, it is characterized in that, when wherein this polarity distribution control signal generating unit and this polarity distribution data driver are also controlled this display panel and shown plural picture, wherein there is in the picture of picture element unit polarity and second half quantity in the picture of half quantity picture element unit polarity opposite.
7, LCD device as claimed in claim 1 is characterized in that, wherein this display panel is a display panels.
8, a kind of liquid crystal display driving method, in order to control a display panel polarity, this display panel has plural picture element unit, and this method mainly comprises the steps:
One sequential produces step, produces a polarity distribution control signal;
One chooses step, exports one group of polarity arrangement non-periodic according to this polarity distribution control signal; And
One Polarity Control step, export this polarity arrangement non-periodic to this display panel, polarity for this display panel picture element unit of control is no periodic array, and when controlling this display panel and showing plural picture, wherein there is in the picture of picture element unit polarity and second half quantity in the picture of half quantity picture element unit polarity opposite.
9, liquid crystal display driving method as claimed in claim 8 is characterized in that, wherein this display panel is a display panels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031074324A CN100358003C (en) | 2003-03-20 | 2003-03-20 | Liquid crystal display device and its driving method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031074324A CN100358003C (en) | 2003-03-20 | 2003-03-20 | Liquid crystal display device and its driving method |
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| CN1532794A true CN1532794A (en) | 2004-09-29 |
| CN100358003C CN100358003C (en) | 2007-12-26 |
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| CNB031074324A Expired - Fee Related CN100358003C (en) | 2003-03-20 | 2003-03-20 | Liquid crystal display device and its driving method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100409301C (en) * | 2005-02-21 | 2008-08-06 | 友达光电股份有限公司 | Liquid crystal display and polarity reversion method |
| CN100424747C (en) * | 2004-12-01 | 2008-10-08 | 洪志明 | Liquid crystal display module and its signal controller and control method |
| US7592992B2 (en) | 2005-01-25 | 2009-09-22 | Au Optronics Corp. | Inversion method for liquid crystal display |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3357173B2 (en) * | 1994-04-13 | 2002-12-16 | 旭硝子株式会社 | Driving method of image display device |
| JP4062876B2 (en) * | 2000-12-06 | 2008-03-19 | ソニー株式会社 | Active matrix display device and portable terminal using the same |
| KR100767364B1 (en) * | 2001-06-19 | 2007-10-17 | 삼성전자주식회사 | Liquid crystal display device and a driving method thereof |
| JP3632637B2 (en) * | 2001-08-09 | 2005-03-23 | セイコーエプソン株式会社 | Electro-optical device, driving method thereof, driving circuit of electro-optical device, and electronic apparatus |
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2003
- 2003-03-20 CN CNB031074324A patent/CN100358003C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100424747C (en) * | 2004-12-01 | 2008-10-08 | 洪志明 | Liquid crystal display module and its signal controller and control method |
| US7592992B2 (en) | 2005-01-25 | 2009-09-22 | Au Optronics Corp. | Inversion method for liquid crystal display |
| CN100409301C (en) * | 2005-02-21 | 2008-08-06 | 友达光电股份有限公司 | Liquid crystal display and polarity reversion method |
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| Publication number | Publication date |
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| CN100358003C (en) | 2007-12-26 |
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