CN1687834A - Multi-zone vertical alignment nematic type liquid crystal display panel and driving method thereof - Google Patents
Multi-zone vertical alignment nematic type liquid crystal display panel and driving method thereof Download PDFInfo
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- CN1687834A CN1687834A CN 200510069226 CN200510069226A CN1687834A CN 1687834 A CN1687834 A CN 1687834A CN 200510069226 CN200510069226 CN 200510069226 CN 200510069226 A CN200510069226 A CN 200510069226A CN 1687834 A CN1687834 A CN 1687834A
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Abstract
The invention is a multiregion vertical aligning liquid crystal display (LCD) panel, comprising an initiative component array substrate, an opposite substrate and a liquid layer arranged between them, where the initiative component array substrate is provided with many scanning lines, many data lines, many control lines and many pixel cells, each pixel cell comprising initiative component, field dividing electrode and pixel electrode connected to the initiative component, and the initiative component is connected with the corresponding scanning line and data line, and the field dividing electrode is connected with the corresponding control line; the pixel electrode is provided with many first slits and the field dividing electrodes are below the first slits; the opposite substrate is provided with a shared electrode layer facing the initiative component array substrate, and the shared electrode layer is provided with many second slits, at least part of the second slits is above the field dividing electrodes.
Description
Technical field
The invention relates to a kind of display panels, and particularly relevant for a kind of multi-field vertical assigned LCD panel and driving method thereof.
Background technology
(thin film transistor liquidcrystal display, performance requirement TFT-LCD) are towards characteristics such as height contrast (high contrastratio), the counter-rotating of no GTG (no gray scale inversion), colour cast little (little colorshift), brightness height (high luminance), high color richness, high color saturation, rapid reaction and wide viewing angles to existing market for Thin Film Transistor-LCD.Can reach the technology of wide viewing angle requirement at present, for example stable twisted nematic liquid crystal (TN) adds view film (wide viewing film), copline suitching type (in-planeswitching, IPS) LCD, limit suitching type (fringe field switching) LCD and multidomain vertical alignment type (multi-doma in vertically alignment, MVA) mode such as Thin Film Transistor-LCD.
For known multi-field vertical assigned LCD panel, because the orientation protrusion (alignment protrusion) or the slit (slit) that are formed on colored optical filtering substrates or the thin-film transistor array base-plate can be so that liquid crystal molecule be multi-direction arrangement, and obtain several different orientation fields (domain), so multi-field vertical assigned LCD panel can be reached the requirement of wide viewing angle.
Fig. 1 illustrates the regular penetrance (normalized transmittance) of existing known multi-field vertical assigned LCD panel and the graph of a relation of GTG (gray level).Please refer to Fig. 1, abscissa is a GTG, and ordinate is regular penetrance.Because Fig. 1 as can be known, though known multi-field vertical assigned LCD panel can be reached the requirement of wide viewing angle, yet along with the visual angle changes, penetrance just has different curvature to the curve (transmittance-level curve) of GTG.In other words, when the visual angle changed, the shown brightness meeting that goes out of known multiple domain vertical orientation type liquid crystal display changed, and then caused colour cast (color shift) and fade phenomenons such as (color washout).In addition, the mode of use orientation protrusion can produce the problem of light leak (light leakage), uses the mode of slit then can cause the reaction time to increase.
Summary of the invention
In view of this, purpose of the present invention is providing a kind of multi-field vertical assigned LCD panel exactly, and it has the short reaction time.
In addition, a further object of the present invention just provides a kind of driving method, in order to drive multi-field vertical assigned LCD panel.
In addition, another purpose of the present invention just provides a kind of multi-field vertical assigned LCD panel, and it has better display quality.
Based on above-mentioned purpose or other purposes, the present invention proposes a kind of multi-field vertical assigned LCD panel, and it comprises an active component array base board, a subtend substrate and a liquid crystal layer, and wherein liquid crystal layer is disposed between active component array base board and the subtend substrate.Active component array base board has many and scans distribution, many data wirings, many control distributions and a plurality of picture elements unit, and wherein each picture element unit is controlled by scan distribution, data wiring and the control distribution of correspondence.Each picture element unit comprises that an active member, one first field cut apart an electrode and a pixel electrode, and wherein active member scans distribution and data wiring electrically connects with corresponding.Electrode and corresponding control distribution electric connection are cut apart in first field.Pixel electrode is electrically connected to active member, and pixel electrode has a plurality of first slits, and first field is cut apart electrode and is positioned at first slit below.The subtend substrate have towards active component array base board use electrode layer altogether, and the common electrode layer has a plurality of second slits, and is positioned at first field to second slit of small part and cuts apart the electrode top.
The pixel electrode of each above-mentioned picture element unit has more a plurality of the 3rd slits, and the 3rd slit is between two adjacent first slits.In addition, each picture element unit comprises that more one second field cuts apart electrode, and it is positioned at part the 3rd slit below, and electrode and corresponding control distribution connection are cut apart in second field.
Above-mentioned common electrode layer comprises a plurality of common electrode groups that are electrically insulated each other, and each common electrode group comprises a plurality of common electrodes, and these common electrodes of corresponding at least each common electrode group in each picture element unit one of them.
Based on above-mentioned purpose or other purposes, the present invention proposes a kind of driving method, and it is applicable to the foregoing description.This driving method comprises cuts apart electrode with a control voltage field of inputing to, so that the liquid crystal molecule of liquid crystal layer produces pre-dumping (pre-tilt).After a schedule time of input control voltage, a data-signal is inputed to the picture element unit.
The magnitude of voltage of above-mentioned control voltage can be periodically to change.In addition, the absolute value of the pressure reduction of the voltage that had greater than pixel electrode voltage and common electrode layer of the absolute value need of the pressure reduction of the voltage that had of control voltage and common electrode layer.
Based on above-mentioned purpose or other purposes, the present invention proposes a kind of driving method, and it is applicable to the foregoing description.This driving method comprises cuts apart electrode with a control voltage field of inputing to, so that the liquid crystal molecule of liquid crystal layer produces pre-dumping.A plurality of common electrode voltages are inputed to corresponding common electrode group respectively.After input control voltage is used a schedule time of electrode voltage together, a data-signal is inputed to the picture element unit.
The magnitude of voltage of above-mentioned control voltage can be periodically to change.In addition, the common voltage magnitude of voltage can be periodically to change.In addition, control voltage together with electrode voltage also can be simultaneously respectively the input field cut apart electrode and corresponding common electrode group.Moreover, the absolute value of the pressure reduction of the voltage that the absolute value need of the pressure reduction of the voltage that control voltage and common electrode layer are had are had greater than pixel electrode voltage and common electrode layer.The difference of each common electrode voltage can be between 0.1V～5V.
Based on above-mentioned purpose or other purposes, the present invention proposes a kind of multi-field vertical assigned LCD panel, and it comprises an active component array base board, a subtend substrate and a liquid crystal layer, and wherein liquid crystal layer is disposed between active component array base board and the subtend substrate.Active component array base board has many and scans distribution, many data wirings and a plurality of picture elements unit, wherein each picture element unit by correspondence scan distribution and data wiring is controlled.Each picture element unit comprises an active member and a pixel electrode, and wherein active member scans distribution and data wiring electrically connects with corresponding, and pixel electrode is electrically connected to active member.The subtend substrate have towards active component array base board use electrode layer altogether, and the common electrode layer comprises a plurality of common electrode groups that are electrically insulated each other.Each common electrode group comprises a plurality of common electrodes, and these common electrodes of corresponding at least each common electrode group in each picture element unit one of them.
Based on above-mentioned purpose or other purposes, the present invention proposes a kind of driving method, and it is applicable to the foregoing description.This driving method comprises the common electrode group that a plurality of common electrode voltages is inputed to correspondence respectively.One data-signal is inputed to the picture element unit.
Above-mentioned common electrode magnitude of voltage can be periodically to change.
The difference of above-mentioned respectively this common electrode voltage is between 0.1V～5V.
Based on above-mentioned purpose or other purposes, the present invention proposes a kind of multi-field vertical assigned LCD panel, it comprises an active component array base board, a subtend substrate, a dielectric layer and a liquid crystal layer, and wherein liquid crystal layer is disposed between active component array base board and the subtend substrate.Active component array base board has many and scans distribution, many data wirings, many control distributions and a plurality of picture elements unit, and wherein each picture element unit scans distribution, this data wiring and this control distribution by this of correspondence and controls.Each picture element unit comprises that an active member, a field cut apart an electrode and a pixel electrode, and wherein active member scans distribution and data wiring electrically connects with corresponding.Electrode and corresponding control distribution electric connection are cut apart in the field.Pixel electrode is electrically connected to active member, and pixel electrode has a plurality of first slits and a plurality of the 3rd slit, and the field is cut apart electrode and is positioned at first slit below.The subtend substrate has uses electrode layer altogether towards active component array base board.Dielectric layer is covered on the partial common electrode layer and/or is covered on the part pixel electrode.
Above-mentioned dielectric layer can be to cover the 3rd slit.Perhaps, dielectric layer can be to cover the field that is positioned to cut apart on the common electrode layer of electrode top.In addition, the material of dielectric layer can be transparent organic material or transparent inorganic material.
Based on above-mentioned, electrode is cut apart in the field of adopting in the present invention not only can improve the light leak problem, more can be so that liquid crystal molecule produces pre-dumping, to shorten the reaction time.In addition, the present invention applies two or more effective voltages for the liquid crystal layer of top, same picture element unit, therefore can be improved with the phenomenon of fading along with the visual angle changes the colour cast that is produced.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 illustrates the regular penetrance of existing known multi-field vertical assigned LCD panel and the graph of a relation of GTG.
Fig. 2 A illustrates the cut-open view according to the multi-field vertical assigned LCD panel of the present invention's first preferred embodiment.
Fig. 2 B illustrates the vertical view of the active component array base board of Fig. 2 A.
The liquid crystal molecule that Fig. 3 A illustrates the multi-field vertical assigned LCD panel of the present invention's first preferred embodiment produces the synoptic diagram of pre-dumping.
Fig. 3 B illustrates the drive waveforms sequential chart of the some inversion driving of the multi-field vertical assigned LCD panel that is used for the present invention's first preferred embodiment.
Fig. 4 illustrates the drive waveforms sequential chart of the pulsed drive of the multi-field vertical assigned LCD panel that is used for the present invention's first preferred embodiment.
Fig. 5 A illustrates the cut-open view according to the multi-field vertical assigned LCD panel of the present invention's second preferred embodiment.
Fig. 5 B illustrates the vertical view of the subtend substrate of Fig. 5 A.
Fig. 6 illustrates the drive waveforms sequential chart of the pulsed drive of the multi-field vertical assigned LCD panel that is used for the present invention's second preferred embodiment.
Fig. 7 A illustrates the regular penetrance of the present invention's second preferred embodiment and the graph of a relation of GTG.
Fig. 7 B illustrates another the regular penetrance of the present invention's second preferred embodiment and the graph of a relation of GTG.
Fig. 8 illustrates the cut-open view of the multi-field vertical assigned LCD panel that is used for the present invention's the 3rd preferred embodiment.
10,20,30: multi-field vertical assigned LCD panel
100: active component array base board
110,310: substrate
120: scan distribution
130: data wiring
140: the control distribution
150: the picture element unit
152: active member
154: electrode is cut apart in the field
154a: electrode is cut apart in first field
154b: electrode is cut apart in second field
156: pixel electrode
156a, 156b, 320a: slit
160,600: dielectric layer
200: liquid crystal layer
210: liquid crystal molecule
300,400,500: the subtend substrate
320,510: the common electrode layer
412,414,416: the common electrode group
422,424,426: the lead group
Embodiment
[first embodiment]
Fig. 2 A illustrates the cut-open view according to the multi-field vertical assigned LCD panel of the present invention's first preferred embodiment, and Fig. 2 B illustrates the vertical view of the active component array base board of Fig. 2 A.Please also refer to Fig. 2 A and Fig. 2 B, multi-field vertical assigned LCD panel 10 comprises an active component array base board 100, a subtend substrate 300 and a liquid crystal layer 200, and wherein liquid crystal layer 200 is disposed between active component array base board 100 and the subtend substrate 300.
Active component array base board 100 can be thin-film transistor array base-plate (thin flim transistorarray substrate), diode array substrate or other active component array base boards, and subtend substrate 300 can be a colored optical filtering substrates (color filter substrate) for example.Yet, active component array base board 100 also can be COA (Color Filter On Array) substrate, and subtend substrate 300 is one to have substrate on the common electrode, wherein COA (Color Filter On Array) substrate is meant thin-film transistor array base-plate (Color Filter On Array, structure COA) that is formed with color filter film.
Active component array base board 100 comprises that a substrate 110, many scan distribution 120, many data wirings 130, many control distributions 140 and a plurality of picture elements unit 150, and these scan distribution 120, data wiring 130, control distribution 140 and are positioned on the substrate 110 with picture element unit 150.In addition, each picture element unit 150 is controlled by scan distribution 120, data wiring 130 and the control distribution 140 of correspondence.
More specifically, each picture element unit 150 comprises that an active member 152, a field cut apart an electrode 154 and a pixel electrode 156, and wherein active member 152 electrically connects with data wiring 130 with the corresponding distribution 120 that scans.In the present embodiment, active member 152 is a thin film transistor (TFT), has the active member of three terminals yet active member 152 also can be diode or other.In addition, electrode 154 is cut apart in the field and corresponding control distribution 140 electrically connects, and relevant for the function that electrode 154 is cut apart in the field will describe as after.In the present embodiment, electrode 154 is cut apart in the field can be divided into that electrode 154a is cut apart in first field and electrode 154b is cut apart in second field, and electrode 154a is cut apart in dielectric layer 160 coverings first field and electrode 154b is cut apart in second field, and pixel electrode 156 is disposed on the dielectric layer 160.Pixel electrode 156 is electrically connected to active member 152, and pixel electrode 156 has a plurality of slit 156a, and first field is cut apart electrode 154a and is positioned at slit 156a below.
What deserves to be mentioned is that pixel electrode also can have a plurality of slit 156b, and slit 156b is between two slit 156a.In addition, electrode 154b is cut apart in second field, and it is positioned at part slit 156b below, and slit 156b does not correspond to any slit 320a (shown in the right side of Fig. 2 A).Yet part slit 156b below can not have any field to cut apart electrode 154b (shown in the left side of Fig. 2 A) yet.Because the type of drive of the multi-field vertical assigned LCD panel 10 of present embodiment has many kinds of kenels, for instance, can be some inversion driving (dot inversion driving) to reach lower crosstalk effect or a pulsed drive (impulse type driving) is to obtain preferable dynamic display effect.To be that example describes below with an inversion driving.
The liquid crystal molecule that Fig. 3 A illustrates the multi-field vertical assigned LCD panel of the present invention's first preferred embodiment produces the synoptic diagram of pre-dumping, and Fig. 3 B illustrates the drive waveforms sequential chart of the some inversion driving of the multi-field vertical assigned LCD panel that is used for the present invention's first preferred embodiment.Please refer to Fig. 3 A and Fig. 3 B, driving method comprises cuts apart electrode 154 with a control voltage field of inputing to, so that the liquid crystal molecule 210 of liquid crystal layer 200 produces pre-dumping (as shown in Figure 3A).In addition, control voltage can be to continue an image time to reach more stable operator scheme.In addition, the voltage that control voltage and common electrode layer 320 are had is to keep a voltage difference, and the absolute value of the common electrode pressure reduction of control voltage and subtend substrate 300 needs to use together greater than pixel electrode voltage the absolute value of the voltage difference of electrode voltage.
For instance, when common electrode is 6.0V, when pixel electrode voltage is 6.0V～11.5V, this moment, pixel electrode voltage was 0～5.5V with the absolute value of the voltage difference of electrode voltage together, and the absolute value of the common electrode pressure reduction of the control voltage of each picture element and subtend substrate 300 needs respectively to use together greater than each pixel electrode voltage the two the pressure reduction of absolute value of the voltage difference of electrode voltage, so the voltage of control voltage can be for example 0V or the voltage below the 0V, or the above voltage of 12V or 12V for example, maybe can be to be fixed as 16V.In like manner, when pixel electrode voltage is 0.5V～6.0V, the control voltage of each picture element and the pressure reduction absolute value of common electrode voltage need respectively greater than each pixel electrode voltage and shared pressure reduction absolute value with electrode voltage, be for example 0V or the following voltage of 0V so can set control voltage, or the above voltage of 12V or 12V for example, or can for fixing or-4V.
Briefly, when common electrode is 6.0V, and electrode voltage is when being 6.0V～11.5V, and control voltage needs the pressure reduction greater than the two, maybe can be reduced to fixing 16V.When electrode voltage was 0.5V～6.0V, the pressure reduction absolute value of control voltage and common electrode needed the absolute value greater than the pressure reduction of pixel electrode voltage and common voltage.For simplicity, can set control voltage is for example to fix-4V.Yet, present embodiment do not limit control voltage must be 16V or-4V, get final product with the absolute value of the voltage difference of electrode voltage together greater than pixel electrode voltage with the absolute value of the pressure reduction of electrode voltage together so long as meet control voltage; Therefore, can as described in above-mentioned content, be other magnitude of voltage also, and prior art person also can change the control voltage of being imported according to the design requirement of product itself.In addition, the magnitude of voltage of control electrode can be the cycle to change magnitude of voltage with an image time, and the driving time of control electrode can be finished in the time of a picture, and the above-mentioned for instance schedule time can be less than 8 * 10
-3Second.
After one schedule time, a data-signal is inputed to picture element unit 150 (shown in Fig. 2 A) at input control voltage.In addition, the schedule time is the time less than a picture, for example can be less than 16.6 * 10
-3Second or less than 1 * 10
-3Second.For example, when data-signal is inputed to picture element unit 150 in the mode of an inversion driving, to control voltage input field via control distribution 140 in regular turn and cut apart electrode 154, and the voltage that each bar control distribution 140 is had just changes magnitude of voltage after through an image time.Then, after the liquid crystal molecule 210 of liquid crystal layer 200 produces pre-dumpings, a start signal is inputed to respectively scan distribution 120 in regular turn, and according to the mode of an inversion driving data-signal is inputed in each picture element unit 150 simultaneously.At this moment, input to polarity opposite (for example positive and negative, positive and negative) respectively with the voltage of two of delegation or same row adjacent picture element unit 150.
More specifically, the voltage that common electrode layer 320 is had can be 6V, and the voltage that pixel electrode 156 has can be between 6～11.5V, drives to carry out positive polarity.Yet the voltage that pixel electrode 156 has also can be between 0.5～6V, drives to carry out negative polarity.
No matter multi-field vertical assigned LCD panel 10 is to adopt black picture (normallyblack) pattern of normality or the white picture of normality (normally white) pattern, because the field is cut apart electrode 154 and is constituted by lighttight conductive material, so the phenomenon that electrode 154 can improve light leak is cut apart in the field.In addition, compared to independent use slit, make liquid crystal molecule produce pre-dumping (pre-tilt) because electrode 154 is cut apart in the field, so multi-field vertical assigned LCD panel 10 have the short reaction time (response time).What deserves to be mentioned is that the mode that data-signal is inputed to picture element unit 150 is not limited to an inversion driving, more can use pulsed drive or other type of drive that is fit to.
Fig. 4 illustrates the drive waveforms sequential chart of the pulsed drive of the multi-field vertical assigned LCD panel that is used for the present invention's first preferred embodiment.Please refer to Fig. 2 B and Fig. 4, cut apart the type of drive of electrode 154, all fields can be cut apart electrode 154 and be electrically connected to two control distributions 140 respectively for the simplification field.This driving method is: (a) voltage is imported these two control distributions 140 respectively, and these two voltages that transmitted of control distribution 140 have nothing in common with each other.(b) after a schedule time, and this time is usually less than a normal image time, and the data-signal branch is inputed to each picture element unit 150, and this is the first part of first image time.(c) the latter half of first image time can be imported dark attitude voltage afterwards, and (among the figure not display data signal voltage) so then gets back to black picture again, (d) changes the magnitude of voltage of control voltage afterwards; So, repeat above-mentioned steps (b)～(d).This kind drives effect can allow control electrode in fixing voltage of transformation of one-period time, and this cycle can be for an image time, less than an image time or the image time more than two or two.So driving circuit is comparatively simple, also can lower process complexity simultaneously.The driving method that electrode 154 is cut apart in the field that the driving method of electrode 154 and Fig. 4 are cut apart in field that it should be noted that Fig. 3 A can be used mutually.
[second embodiment]
Fig. 5 A illustrates the cut-open view according to the multi-field vertical assigned LCD panel of the present invention's second preferred embodiment, and Fig. 5 B illustrates among Fig. 5 A, by the vertical view of liquid crystal orientation towards the subtend substrate.In this is graphic, be to be that example illustrates with two picture elements up and down.Yet under the practice situation, its scope can contain a picture element unit, a plurality of picture elements unit.Please also refer to Fig. 5 A and Fig. 5 B, in the multi-field vertical assigned LCD panel 20 of present embodiment, the common electrode layer 410 of subtend substrate 400 is divided into a plurality of common electrode groups 412,414 and 416, and is to be electrically insulated each other between each common electrode group 412,414 and 416.In addition, each common electrode group 412,414 and 416 can comprise a plurality of common electrodes; Yet be to be that example illustrates with two adjacent picture elements up and down only in Fig. 5 B, therefore, common electrode group 412,414 and 416 only comprises two respectively in this figure, two and a common electrode.In this embodiment, each picture element unit is corresponding three common electrode groups 412,414 and 416.Though it should be noted that the common electrode layer 410 of present embodiment is to illustrate with three common electrode groups 412,414 and 416, yet the common electrode layer 410 of present embodiment can also be divided into the common electrode group more than two or four.
In addition, because the resistance value of common electrode layer 410 is higher, so subtend substrate 400 more can comprise a plurality of lead groups 422,424 and 426, and each lead group 422,424 and 426 comprises many leads; Yet be to be that example illustrates with two adjacent picture elements up and down only in Fig. 5 B, therefore, each lead group 422,424 and 426 only has two respectively in this figure, two and a lead.And each common electrode group 412,414 and 416 covers corresponding lead group 422,424 and 426 respectively.Therefore, voltage can input to corresponding common electrode group 412,414 and 416 respectively via lead group 422,424 and 426.Below the function mode of the multi-field vertical assigned LCD panel of present embodiment will be described by pulsed drive.
Fig. 6 illustrates the drive waveforms sequential chart of the pulsed drive of the multi-field vertical assigned LCD panel that is used for the present invention's second preferred embodiment.Please also refer to Fig. 2 B, Fig. 5 A, Fig. 5 B and Fig. 6, with regard to pulsed drive, this driving method comprises the following steps.At first, electrode 154 is cut apart in a control voltage field of inputing to, so that the liquid crystal molecule 210 of liquid crystal layer 200 produces pre-dumping.In addition, control voltage can be 16V or-4V.In addition, control voltage can be to continue an image time.Wherein, the schedule time can be less than an image time, for example is less than 16.6 * 10
-3Second or less than 1 * 10
-3Second.
Then, a plurality of common voltages are inputed to corresponding common electrode group 412,414 and 416 respectively.In addition, common voltage can periodically be changed magnitude of voltage, and this cycle can be for less than an image time, image time, two image times or the image time more than two.More specifically, the magnitude of voltage of control voltage and common electrode can be the periodic magnitude of voltage of changing, and this cycle can be for an image time, less than an image time, two image times or the image time more than two.In a preferred embodiment, the magnitude of voltage of control voltage and common electrode is promptly to change magnitude of voltage behind an image time.In addition, each common electrode voltage also can be to input to corresponding common electrode group and control electrode (electrode is cut apart in the field) simultaneously with control voltage.Moreover predetermined difference input time of data-signal (pixel voltages) of control voltage, common voltage and input can be less than an image time, for example less than 16.68 * 10
-3Second or less than 1 * 10
-3Second.
In addition, control voltage and common electrode are to keep a voltage difference, and the absolute value of this voltage difference is greater than the absolute value of the voltage difference of pixel electrode and common electrode.More specifically, for the liquid crystal of making way for identical picture element zone is experienced in various degree the voltage that applies, above-mentioned common electrode is preferably has the common electrode group that is electrically insulated each other more than, and those common electrode groups are to apply different magnitudes of voltage respectively.The voltage of each common electrode group has different voltage differences with the voltage of the signal pixel electrode of infrabasal plate electrode.Its difference is preferably to be needed between between 0.1V～5V.If illustrate for instance with two groups of common electrode groups, the voltage of these two groups of common electrodes can for example be respectively 5.6V and or 6.4V; So, with respect to the magnitude of voltage A volt of identical pixel electrode, the voltage difference of these two groups of common electrode groups and this pixel electrode is respectively | 5.6-A|V and | 6.4-A|V.Therefore, both differ the voltage difference opposite sex of experiencing corresponding to the liquid crystal of these two groups of common electrode groups and are 0.8V.Perhaps, if when illustrating with three groups of common electrode groups, common electrode voltage also can for example be respectively 5.2V, 6V or 6.8V; So, with respect to the magnitude of voltage A volt of identical pixel electrode, the voltage difference of these three groups of common electrode groups and this pixel electrode is respectively | 5.2-A|V, | 6-A|V and | 6.8-A|V.Therefore, the voltage difference opposite sex of experiencing corresponding to the liquid crystal of these three groups of common electrode groups is three's common phase difference 0.8V or 1.6V.
Briefly, control voltage can be 16V or-4V, at this moment, the common electrode voltage of being arranged in pairs or groups also can be respectively 5.2V, 6V or 6.8V, so the absolute value of the voltage difference of control electrode and common electrode is 9.2V, 10V, 10.8V.In addition, pixel electrode voltage is 0.5V～6V or 6V～11.5V, and the absolute value of the voltage difference of pixel electrode and common electrode is then about 0V～6.3V.Therefore a pixel electrode forms three kinds of voltage differences altogether with the upper substrate common electrode, and is 0.8V or 1.6V corresponding to the voltage difference opposite sex that the liquid crystal of these three groups of common electrodes is experienced.Yet do not limit the voltage of difference at this, in general this difference value has reasonable effect at 0.1V～5V.What deserves to be mentioned is that when only being divided into two common electrode groups, the voltage of importing these two common electrode groups can for example be 5.6V or 6.4V.
In order to make driving method to simplify, these common electrode voltages also can be to input to corresponding common electrode group 412,414 and 416 simultaneously.In addition, control voltage also can be simultaneously respectively the field of inputing to cut apart electrode 154.Be depicted as a driving design drawing of simplifying as figure six, this driving method is: (a) voltage is imported these two controls distributions 140 and three control electrode groups 412,414 and 416 respectively, and these two controlled distribution 140 and three control electrode groups 412,414 and 416 voltages that transmitted and have nothing in common with each other.(b) after a schedule time, and this time is usually less than a normal image time, and data-signal is inputed to each picture element unit 150 respectively, and this is the first part of first image time.(c) the latter half of first image time can be imported dark attitude voltage afterwards, and (among the figure not display data signal voltage) so then gets back to black picture again, (d) changes the magnitude of voltage that control voltage is used electrode voltage together afterwards; So, repeat above-mentioned steps (b)～(d).This kind drives effect can allow control electrode in fixing voltage of transformation of one-period time, and this cycle can be for an image time, less than an image time or the image time more than two or two.So driving circuit is comparatively simple; Simultaneously also can lower process complexity.In addition, the control distribution 140 of present embodiment and three control electrode groups 412,414 and 416 are divided into several parts, and import the different voltage of polarity respectively.Yet, also can be one group mode input voltage (shown in Fig. 3 B) in regular turn with two control distributions 140.
Fig. 7 A illustrates the regular penetrance of the present invention's second preferred embodiment and the graph of a relation of GTG, and Fig. 7 B illustrates another the regular penetrance of the present invention's second preferred embodiment and the graph of a relation of GTG.Please refer to Fig. 7 A and Fig. 7 B, abscissa is a GTG, and ordinate is regular penetrance.In Fig. 7 A and Fig. 7 B, area 1, area 2 and area 3 are represented the area ratio of each common electrode group that corresponds to each picture element unit respectively.Because common electrode layer 410 is divided into a plurality of common electrode groups 412,414 and 416, and inputs to the voltage inequality of these common electrode groups 412,414 and 416, the effective voltage that therefore puts on the liquid crystal layer 200 of 150 tops, same picture element unit just has three kinds.
More specifically, by Fig. 7 A and Fig. 7 B as can be known, compared to known techniques (as shown in Figure 1), the multi-field vertical assigned LCD panel 20 of present embodiment has better display quality.In addition, because the difference of the area ratio of each common electrode group, the regular penetrance that is produced and the curve of GTG are just inequality, therefore select the area of each suitable common electrode group than just reaching better display quality.Similarly, if common electrode layer 410 only is divided into two or four above common electrode groups, then the area of these two or this common electrode group more than four also can be done suitable collocation, to improve colour cast and the phenomenon of fading.What deserves to be mentioned is, in same picture element unit 150, provide the mode of two or more effective voltage to be not limited to the foregoing description, its describe in detail as after.
[the 3rd embodiment]
Fig. 8 illustrates the cut-open view of the multi-field vertical assigned LCD panel that is used for the present invention's the 3rd preferred embodiment.Please refer to Fig. 8, in the multi-field vertical assigned LCD panel 30 of present embodiment, subtend substrate 500 has having altogether with electrode layer 510 towards active component array base board 100.In addition, dielectric layer 600 is covered on the partial common electrode layer 410 and is covered on the part pixel electrode 156.What deserves to be mentioned is that dielectric layer 600 also can only be covered on the partial common electrode layer 510 or only be covered on the part pixel electrode 156.
More specifically, dielectric layer 600 can be that the slit 156b that is covered in pixel electrode 156 goes up (as the two side portions of Fig. 8) or dielectric layer 600 can be to be positioned at the field to cut apart (as the middle body of Fig. 8) on the common electrode layer of electrode 154 tops.In addition, the material of dielectric layer 600 can be transparent organic material or transparent inorganic material.
In sum, multi-field vertical assigned LCD panel of the present invention and driving method thereof have following advantage at least:
One, because the field is cut apart electrode and is constituted by lighttight conductive material, so the field cuts apart the phenomenon that electrode not only can improve light leak, and the field cut apart electrode more can be so that liquid crystal molecule produces pre-dumping, with the shortening reaction time.
Two, for an inversion driving or pulsed drive, after will controlling a period of time that voltage inputs to the field control electrode, just data are inputed to the picture element unit.In other words, data are inputed to before the picture element unit, liquid crystal molecule has presented the state of pre-dumping, so the reaction time can shorten.
Three, compared to known techniques, owing to the common electrode layer is divided into a plurality of common electrode groups, and applies different voltage, therefore in the liquid crystal layer on same picture element unit, two or more effective voltages can be arranged, change colour cast that is produced and the phenomenon of fading to improve with the visual angle.
Four, the present invention is disposed at dielectric layer on partial common electrode layer and/or the part pixel electrode, therefore can apply two or more effective voltages for the liquid crystal layer on same picture element unit.
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 accompanying the claim person of defining.
Claims (21)
1, a kind of multi-field vertical assigned LCD panel is characterized in that it comprises:
One active component array base board, have many and scan distribution, many data wirings, many control distributions and a plurality of picture elements unit, wherein each picture element unit scans distribution, this data wiring and this control distribution by this of correspondence and controls, and each picture element unit comprises:
One active member scans distribution with corresponding this and this data wiring electrically connects;
Electrode is cut apart in one first field, with this corresponding control distribution electric connection;
One pixel electrode be electrically connected to this active member, and this pixel electrode has a plurality of first slits, and this first field is cut apart electrode and is positioned at this first slit below;
One subtend substrate, have towards this active component array base board use electrode layer altogether, and this common electrode layer has a plurality of second slits, and is positioned at this first field to this second slit of small part and cuts apart the electrode top; And
One liquid crystal layer is disposed between this active component array base board and this subtend substrate.
2, multi-field vertical assigned LCD panel according to claim 1 is characterized in that wherein this pixel electrode of each picture element unit has more a plurality of the 3rd slits, and the 3rd slit is between two adjacent these first slits.
3, multi-field vertical assigned LCD panel according to claim 2, it is characterized in that wherein each picture element unit comprises that more one second field cuts apart electrode, be positioned at part the 3rd slit below, and electrode and this corresponding control distribution connection are cut apart in this second field.
4, multi-field vertical assigned LCD panel according to claim 1, it is characterized in that wherein said common electrode layer comprises a plurality of common electrode groups that are electrically insulated each other, and each common electrode group comprises a plurality of common electrodes, and this common electrode of corresponding at least respectively this common electrode group in each picture element unit one of them.
5, a kind of driving method is applicable to the multi-field vertical assigned LCD panel of claim 1 to it is characterized in that wherein said driving method comprises:
One control voltage is inputed to this field cut apart electrode, so that the liquid crystal molecule of this liquid crystal layer produces pre-dumping (pre-tilt); And
After a schedule time of this control voltage of input, a data-signal is inputed to this picture element unit.
6, driving method according to claim 5, the magnitude of voltage that it is characterized in that wherein said control voltage is for periodically changing.
7, driving method according to claim 5, the absolute value that it is characterized in that the pressure reduction of the voltage that wherein said control voltage and this common electrode layer are had need the absolute value of the pressure reduction of the voltage that had greater than this pixel electrode voltage and this common electrode layer.
8, a kind of driving method is applicable to the multi-field vertical assigned LCD panel of claim 4 to it is characterized in that wherein said driving method comprises:
One control voltage is inputed to this field cut apart electrode, so that the liquid crystal molecule of this liquid crystal layer produces pre-dumping;
A plurality of common electrode voltages are inputed to this corresponding common electrode group respectively; And
After a schedule time of this control voltage of input and this common electrode voltage, a data-signal is inputed to this picture element unit.
9, driving method according to claim 8, the magnitude of voltage that it is characterized in that wherein said control voltage is for periodically changing.
10, driving method according to claim 8 is characterized in that wherein said common electrode magnitude of voltage is for periodically changing.
11, driving method according to claim 8 is characterized in that wherein said control voltage and this common electrode voltage comprise that importing this field simultaneously respectively cuts apart electrode and this corresponding common electrode group.
12, driving method according to claim 8, the absolute value that it is characterized in that the pressure reduction of wherein said control voltage and this common electrode voltage needs the absolute value greater than the pressure reduction of this pixel electrode voltage and this common electrode voltage.
13, driving method according to claim 8 is characterized in that wherein respectively the difference of this common electrode voltage is between 0.1V～5V.
14, a kind of multi-field vertical assigned LCD panel is characterized in that it comprises:
One active component array base board has many and scans distribution, many data wirings and a plurality of picture elements unit, and wherein each picture element unit scans distribution by this of correspondence and this data wiring is controlled, and each picture element unit comprises:
One active member scans distribution with corresponding this and this data wiring electrically connects;
One pixel electrode is electrically connected to this active member;
One subtend substrate, have and use electrode layer altogether towards this active component array base board, and this common electrode layer comprises a plurality of common electrode groups that are electrically insulated each other, and each common electrode group comprises a plurality of common electrodes, and this common electrode of corresponding at least respectively this common electrode group in each picture element unit one of them; And
One liquid crystal layer is disposed between this active component array base board and this subtend substrate.
15, a kind of driving method is applicable to the multi-field vertical assigned LCD panel of claim 14 to it is characterized in that wherein said driving method comprises:
A plurality of common electrode voltages are inputed to this corresponding common electrode group respectively; And
One data-signal is inputed to this picture element unit.
16, driving method according to claim 15 is characterized in that wherein said common electrode magnitude of voltage is for periodically changing.
17, driving method according to claim 15 is characterized in that wherein respectively the difference of this common electrode voltage is between 0.1V～5V.
18, a kind of multi-field vertical assigned LCD panel is characterized in that it comprises:
One active component array base board, have many and scan distribution, many data wirings, many control distributions and a plurality of picture elements unit, wherein each picture element unit scans distribution, this data wiring and this control distribution by this of correspondence and controls, and each picture element unit comprises:
One active member scans distribution with corresponding this and this data wiring electrically connects;
Electrode is cut apart in one field, with this corresponding control distribution electric connection;
One pixel electrode be electrically connected to this active member, and this pixel electrode has a plurality of first slits and a plurality of the 3rd slit, and this field is cut apart electrode and is positioned at this first slit below;
One subtend substrate has and uses electrode layer altogether towards this active component array base board;
One dielectric layer, be covered in the part this common electrode layer on and/or be covered in the part this pixel electrode on; And
One liquid crystal layer is disposed between this active component array base board and this subtend substrate.
19, multi-field vertical assigned LCD panel according to claim 18 is characterized in that wherein said dielectric layer covers the 3rd slit.
20, multi-field vertical assigned LCD panel according to claim 18 is characterized in that wherein said dielectric layer covering is positioned at this field and cuts apart on this common electrode layer of electrode top.
21, multi-field vertical assigned LCD panel according to claim 18 is characterized in that the material of wherein said dielectric layer comprises transparent organic material or transparent inorganic material.
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| CNB2005100692268A CN100373250C (en) | 2005-05-12 | 2005-05-12 | Multi-zone vertical alignment nematic type liquid crystal display panel and driving method thereof |
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| CNB2005100692268A CN100373250C (en) | 2005-05-12 | 2005-05-12 | Multi-zone vertical alignment nematic type liquid crystal display panel and driving method thereof |
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| CN100445854C (en) * | 2006-11-02 | 2008-12-24 | 上海广电光电子有限公司 | Vertical assigned mode LCD device and manufacturing method of its array base plate |
| US7683990B2 (en) | 2006-12-13 | 2010-03-23 | Chunghwa Picture Tubes, Ltd. | Multi-domain vertical alignment liquid crystal display panel |
| CN102289106A (en) * | 2010-06-15 | 2011-12-21 | 斯坦雷电气株式会社 | Liquid crystal display |
| US8102493B2 (en) | 2004-10-29 | 2012-01-24 | Chimei Innolux Corporation | Multi-domain vertically aligned liquid crystal display |
| CN101387806B (en) * | 2007-07-20 | 2012-07-18 | 奇美电子股份有限公司 | LCD panel and method for manufacturing same |
| CN104898330A (en) * | 2015-05-12 | 2015-09-09 | 南京中电熊猫液晶显示科技有限公司 | TFT (Thin Film Transistor) array substrate and liquid crystal display panel |
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| KR100313952B1 (en) * | 1998-08-20 | 2002-11-23 | 엘지.필립스 엘시디 주식회사 | Multi-domain liquid crystal display device |
| JP3492582B2 (en) * | 2000-03-03 | 2004-02-03 | Ｎｅｃ液晶テクノロジー株式会社 | Liquid crystal display device and method of manufacturing the same |
| JP4571727B2 (en) * | 2000-03-17 | 2010-10-27 | シャープ株式会社 | LCD panel |
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| TWI293134B (en) * | 2001-12-27 | 2008-02-01 | Hannstar Display Corp | Biased bending vertical alignment mode liquid crystal display |
| KR100498632B1 (en) * | 2002-12-31 | 2005-07-01 | 엘지.필립스 엘시디 주식회사 | Liquid crystal display panel and fabricating method thereof |
| US7019805B2 (en) * | 2002-12-31 | 2006-03-28 | Lg.Philips Lcd Co., Ltd. | Liquid crystal display device having a multi-domain structure and a manufacturing method for the same |
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| US8102493B2 (en) | 2004-10-29 | 2012-01-24 | Chimei Innolux Corporation | Multi-domain vertically aligned liquid crystal display |
| CN100445854C (en) * | 2006-11-02 | 2008-12-24 | 上海广电光电子有限公司 | Vertical assigned mode LCD device and manufacturing method of its array base plate |
| US7683990B2 (en) | 2006-12-13 | 2010-03-23 | Chunghwa Picture Tubes, Ltd. | Multi-domain vertical alignment liquid crystal display panel |
| USRE45115E1 (en) | 2006-12-13 | 2014-09-09 | Intellectual Ventures Fund 82 Llc | Multi-domain vertical alignment liquid crystal display panel |
| CN101387806B (en) * | 2007-07-20 | 2012-07-18 | 奇美电子股份有限公司 | LCD panel and method for manufacturing same |
| CN102289106A (en) * | 2010-06-15 | 2011-12-21 | 斯坦雷电气株式会社 | Liquid crystal display |
| CN102289106B (en) * | 2010-06-15 | 2016-02-17 | 斯坦雷电气株式会社 | Liquid crystal indicator |
| CN104898330A (en) * | 2015-05-12 | 2015-09-09 | 南京中电熊猫液晶显示科技有限公司 | TFT (Thin Film Transistor) array substrate and liquid crystal display panel |
| CN111487821A (en) * | 2020-05-12 | 2020-08-04 | Tcl华星光电技术有限公司 | Display panel and display device |
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