CN100456115C - Polymer liquid crystal panel with stable orientation - Google Patents
Polymer liquid crystal panel with stable orientation Download PDFInfo
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- CN100456115C CN100456115C CNB2006101263550A CN200610126355A CN100456115C CN 100456115 C CN100456115 C CN 100456115C CN B2006101263550 A CNB2006101263550 A CN B2006101263550A CN 200610126355 A CN200610126355 A CN 200610126355A CN 100456115 C CN100456115 C CN 100456115C
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Abstract
The related liquid crystal panel with stable-arranged polymer comprises multiple pixel units every with an independent first and second electrode to divide the area into four parts, wherein the unit pixel may include more sub-areas divided by the transistor and capacitor.
Description
Technical field
The present invention relates to a kind of liquid crystal panel, particularly relate to a kind of polymer steady direction liquid crystal panel.
Background technology
Along with the progress that shows science and technology, compare with traditional CRT monitor, LCD (liquidcrystal display, TFT-LCD) owing to have the little and advantage that do not take up space of light, thin, low radiation and volume, become at present main force's product of monitor market, a large amount of being applied in the various electronic products such as counter, PDA(Personal Digital Assistant), mobile computer, digital camera, mobile phone simultaneously.
Be the fast development in response to liquid crystal display product, the competition of liquid crystal panel manufacturer increases day by day.Input research and development that industry is positive and the more advanced production equipment of employing constantly descend the production cost of LCD, more make the demand of LCD heighten.For application and the quality that further expands LCD, the research emphasis of current LCD, the reaction time that mainly concentrates on augmentation visual angle how and shorten screen.
In order to reach the demand, liquid crystal panel often adopts multiple minute territory vertical orientation (multi-domainvertical alignment; MVA) design.By in the process of making liquid crystal panel, on shared electrode and pixel electrode, form the projection or the opening of orientation control usefulness, liquid crystal molecule is not being applied under the voltage condition, just along the shape of projection or opening, present the state that tilts a little.Thus, when pixel electrode is applied voltage, liquid crystal molecule under the driving of electric field, can be rapidly by little state that slightly tilts, topple over towards predetermined direction, and significantly shorten the screen reaction time, and reach and increase wide-visual angle effect.
Because multiple minute territory vertical orientation technology must utilize thin film deposition processes, photoetching process and etch process etc., form projection be opened on shared electrode or pixel electrode on, so on the complexity of technology and manufacturing cost all relative raising much.In addition, be formed at the light of the projection regular meeting shaded portions of substrate, so projection can reduce aperture ratio of pixels, and then the picture brightness of reduction LCD.
In order to improve the problem that liquid crystal panel produced of using multiple minute territory vertical orientation (MVA) technology, industry develops and to utilize a kind of using polymer stable alignment (polymer stabilized alignment; PSA) technology is made the design of liquid crystal panel.
Liquid crystal panel has comprised a upper substrate, a layer of liquid crystal molecule, an infrabasal plate.Layer of liquid crystal molecule is formed between upper substrate and the infrabasal plate.Between layer of liquid crystal molecule and upper substrate, be provided with one and share electrode.
Please refer to Fig. 1, this figure has shown the dot structure in the existing polymer steady direction liquid crystal panel, and this dot structure mainly is formed at the infrabasal plate surface.For each unit picture element 10, its primary clustering has comprised sweep trace 101, data line 102, thin film transistor (TFT) 103, storage capacitors 104 and pixel electrode 105.When carrying out running program, can be by sweep trace 101 input one scan signals, conducting membrane transistor 103, and the voltage signal on the data line 102 is sent in the pixel electrode 105.Simultaneously, the voltage signal by data line 102 is imported can be retained in the storage capacitors 104, so that supply with in the neutral gear at image data, still can continue to keep unit picture element 10 in certain grey component level standard.
As shown in the figure, the shape of pixel electrode 105 has comprised many strip patterns parallel to each other, and these long strip type patterns are stretched (i.e. herring-bone form pattern among the figure) towards four orientation angles edges respectively.When this unit picture element 10 is done the time spent, the electric field that produces between pixel electrode 105 and shared electrode can make the liquid crystal molecule in the layer of liquid crystal molecule produce corresponding deflection according to this electric field.Because the relation of pixel electrode 105 shapes, liquid crystal molecule can be respectively towards four orientation angles deflections, and form the effect that quadruple is divided the territory.
In order to shorten the reaction time of liquid crystal panel, can after producing pixel electrodes 105, re-use the polymer-stabilized alignment technology, allow liquid crystal molecule have fixing tilt angle.Its production method is in the process of making liquid crystal panel, add the monomer that is used for the polymkeric substance orientation into a kind of at layer of liquid crystal molecule, and apply voltage signal to shared electrode and pixel electrode 105, make each liquid crystal deflecting element to a predetermined direction, above-mentioned monomer is also arranged along with the orientation of liquid crystal molecule simultaneously.Then, utilize the mode of energy light (can be visible light or ultraviolet light) or thermal polymerization, make above-mentioned monomer polymerization become high molecular polymer, and being formed in the liquid crystal panel of tilting.
By this polymer-stabilized alignment technology, high molecular polymer can make liquid crystal molecule have a tilt angle, that is liquid crystal molecule is subjected to the influence of high molecular polymer when not being subjected to electric field driven, and the arrangement that can tilt.Therefore, when liquid crystal molecule was subjected to electric field driven, liquid crystal molecule just can promptly deflect into suitable orientation, and then shortened the reaction time of liquid crystal panel.
In addition owing to do not have projection and opening in the liquid crystal panel of polymer-stabilized alignment (PSA), with multiple minute the territory vertical orientation (MVA) liquid crystal panel compare, do not have the problem of dark attitude light leak, therefore, can provide the LCD of high contrast, high brightness.
At present in the liquid crystal panel of polymer-stabilized alignment (PSA), pixel electrode 105 is made of the ITO material, and produces the pattern of herring-bone form by photoetching process, single pixel segmentation can be become four branch territories.Although correlative value, the brightness value of liquid crystal panel can be significantly promoted in this kind design, and effectively shorten the reaction time.But along with the trend that the liquid crystal panel size increases, this kind design still can't solve the problem of colour cast with great visual angle, and can't further reduce the phenomenon of color saturation deficiency (color washout).
Summary of the invention
The object of the present invention is to provide the liquid crystal panel of a kind of using polymer stable alignment technology manufacturing, see through the configuration and the design of pixel electrode, transistor, liquid crystal capacitance and storage capacitors in each unit picture element in the liquid crystal panel, make the branch territory of single unit picture element be increased to eight branch territories by existing four branch territories.Thus, owing to divide the increase in territory in the unit picture element,, great improvement has just been arranged, also further reduced the phenomenon of color saturation deficiency (color washout) for the problem of colour cast with great visual angle.
The liquid crystal panel of the disclosed polymer-stabilized alignment of the present invention (PSA LCD panel) has a plurality of unit picture elements, and wherein the per unit pixel has first pixel electrode independent of each other and second pixel electrode.The distribution arrangement of the pattern of first pixel electrode and second pixel electrode, separating separately is four branch territories.
The liquid crystal panel of the disclosed polymer-stabilized alignment of the present invention, comprise a plurality of unit picture elements, wherein each unit picture element comprises one scan line, a data line, a first transistor, one first liquid crystal capacitance, one first storage capacitors, one second liquid crystal capacitance and one second storage capacitors.
Sweep trace is in order to transmit sweep signal.Data line is in order to transmit voltage signal.The first transistor is opened in response to sweep signal, and transmits voltage signal.First liquid crystal capacitance by first pixel electrode, liquid crystal layer, constitute with first shared electrode, is connected in the first transistor to receive voltage signal.First storage capacitors, in parallel with first liquid crystal capacitance by first capacitance electrode, first dielectric layer, constitute with second shared electrode, be connected in the first transistor to receive voltage signal.
Second liquid crystal capacitance by second pixel electrode, liquid crystal layer, constitute with first shared electrode, is coupled to data line, and wherein second pixel electrode is independently of one another with first pixel electrode and can be electrically and separate.Second storage capacitors, by second capacitance electrode, first dielectric layer, constitute with the 3rd shared electrode, and in parallel with second liquid crystal capacitance.
This first pixel electrode has four branch territories, and this first pixel electrode of part in each territory comprises many strip patterns parallel to each other this minute, and each divides those strip patterns in territory to extend distribution along same direction.This second pixel electrode has four branch territories, and this second pixel electrode of part in each territory comprises many strip patterns parallel to each other this minute, and each divides those strip patterns in territory to extend distribution along same direction.This unit picture element has more a coupling capacitance, be connected between this first transistor and this second liquid crystal capacitance, first utmost point of this coupling capacitance is connected in the source/drain electrode of the first transistor, and second utmost point of this coupling capacitance is connected to second pixel electrode and second capacitance electrode, makes this first liquid crystal capacitance have different folder potential differences with this second liquid crystal capacitance by this coupling capacitance.
In order further to understand feature of the present invention and content, see also following about detailed description of the present invention and accompanying drawing.
Description of drawings
Fig. 1 is the top view of the dot structure in the liquid crystal panel of existing polymer-stabilized alignment;
Fig. 2 is the unit picture element top view of first embodiment of the invention;
Fig. 3 is the unit picture element schematic equivalent circuit of first embodiment of the invention;
Fig. 4 A is the sectional view of 2a-2a ' profile line in the unit picture element of Fig. 2;
Fig. 4 B is the sectional view of 2b-2b ' profile line in the unit picture element of Fig. 2;
Fig. 5 is the unit picture element top view of second embodiment of the invention;
Fig. 6 A is the sectional view of 4a-4a ' profile line in the unit picture element of Fig. 5;
Fig. 6 B is the sectional view of 4b-4b ' profile line in the unit picture element of Fig. 5;
Fig. 7 is the unit picture element top view of third embodiment of the invention;
Fig. 8 is the unit picture element schematic equivalent circuit of third embodiment of the invention;
Fig. 9 A is the sectional view of 5a-5a ' profile line in the unit picture element of Fig. 7; And
Fig. 9 B is the sectional view of 5b-5b ' profile line in the unit picture element of Fig. 7.
Description of reference numerals
10,20,40,50: unit picture element
101,201,401,501: sweep trace
102,202,402,502: data line
103: thin film transistor (TFT)
104: storage capacitors
105: pixel electrode
210,410,510: the first transistor
220: transistor seconds
200,400,500: upper substrate
240,440,540: liquid crystal layer
530: the three transistors
260,460,560: the first dielectric layers
270,470,570: the second dielectric layers
Clc1: first liquid crystal capacitance
211,411,511: the first pixel electrodes
212,412,512: the first shared electrode
Cst1: first storage capacitors
213,413,513: the first capacitance electrodes
214,414,514: the second shared electrode
Clc2: second liquid crystal capacitance
221,421,521: the second pixel electrodes
Cst2: second storage capacitors
223,423,523: the second capacitance electrodes
224,424,524: the three shared electrode
Cx: coupling capacitance
233: the first utmost points
234: the second utmost points
Embodiment
The invention provides a kind of polymer-stabilized alignment (polymer stabilized alignment that utilizes; PSA) liquid crystal panel of technology manufacturing.Wherein, each unit picture element in liquid crystal panel has multiple topograph case, is used for producing than more minute territory of prior art, improves the problem of colour cast with great visual angle by this.Shown in relevant of the present invention being described in detail as follows.
The present invention has disclosed a kind of polymer steady direction liquid crystal panel (PSA LCD panel), the infrabasal plate that this liquid crystal panel has comprised a plurality of unit picture elements, had the upper substrate of colored filter and have thin film transistor (TFT).Please be simultaneously with reference to Fig. 2, Fig. 3, Fig. 4 A and Fig. 4 B, wherein Fig. 2 and Fig. 3 have shown unit picture element 20 top views and the schematic equivalent circuit thereof of first embodiment of the invention respectively, and Fig. 4 A and Fig. 4 B then are respectively the sectional view of 2a-2a ' profile line and 2b-2b ' profile line in the unit picture element 20 of Fig. 2.As shown in the figure, each unit picture element 20 of liquid crystal panel comprises one scan line 201, a data line 202, a first transistor 210, one first liquid crystal capacitance Clc1, one first storage capacitors Cst1, one second liquid crystal capacitance Clc2 and one second storage capacitors Cst2.
The first liquid crystal capacitance Clc1 is by first pixel electrode 211, a liquid crystal layer 240, constituted with one first shared electrode 212.The above-mentioned first liquid crystal capacitance Clc1 is connected in the first transistor 210, to receive voltage signal.Wherein, first shared electrode 212 is formed at upper substrate 200 ends of liquid crystal panel.
The first storage capacitors Cst1 is by one first capacitance electrode 213, one first dielectric layer 260, constituted with one second shared electrode 214.This first storage capacitors Cst1 is in parallel with the first liquid crystal capacitance Clc1, and is connected in the first transistor 210, to receive voltage signal.As shown in Figure 2, the grid of the first transistor 210 is connected in sweep trace 201, and the source of the first transistor 210/drain electrode one end is connected in data line 202, and the other end then is connected to first pixel electrode 211 and first capacitance electrode 213.
The second liquid crystal capacitance Clc2, by one second pixel electrode 221, liquid crystal layer 240, constituted with first shared electrode 212, and the second liquid crystal capacitance Clc2 is coupled to data line 202.Wherein, second pixel electrode 221 is independently of one another with first pixel electrode 211 and can be electrically and separate, that is first pixel electrode 211 is isolated from each other with second pixel electrode 221 and does not directly contact, and also can not electrically conduct or can not be coupled.The second storage capacitors Cst2, by second capacitance electrode 223, first dielectric layer 260, constitute with one the 3rd shared electrode 224, and in parallel with the second liquid crystal capacitance Clc2.
In addition, please refer to Fig. 4 A and Fig. 4 B, have more one second dielectric layer 270 in the unit picture element 20 between each pixel electrode and each capacitance electrode, that is between the liquid crystal layer 240 and first dielectric layer 260.
As mentioned above, each unit picture element 20 of liquid crystal panel of the present invention has first pixel electrode 211 independent of each other and second pixel electrode 221.Please refer to Fig. 2, the distribution arrangement of first pixel electrode 211 and second pixel electrode, 221 its patterns, separating separately is four branch territories.Part first pixel electrode 211 and second pixel electrode 221 in each branch territory comprise many strip patterns parallel to each other, and these strip patterns extend distribution towards same direction.
In a preferred embodiment, be arranged in above-mentioned four branch territories those strip patterns bearing of trend orientation angles approximately respectively between 40-50 degree, 130-140 degree, 220-230 degree, with the 310-320 degree.Therefore, the pattern distribution that first pixel electrode 211 and second pixel electrode 221 are presented is similar to the herring-bone form pattern.
Please refer to Fig. 2 and Fig. 3, the unit picture element 20 of first embodiment has more a coupling capacitance Cx, is connected between the first transistor 210 and the second liquid crystal capacitance Clc2.Coupling capacitance Cx has one first utmost point 233 respect to one another and one second utmost point 234.First utmost point 233 is connected in the source/drain electrode of the first transistor 210, and second utmost point 234 then is connected to second pixel electrode 221 and second capacitance electrode 223.
Please refer to Fig. 4 B, show a kind of formation aspect of coupling capacitance Cx among the figure, first utmost point 233 of coupling capacitance Cx is first capacitance electrode 213, and second utmost point 234 of coupling capacitance Cx is second pixel electrode 221.And this coupling capacitance Cx is by second pixel electrode 221, second dielectric layer 270, constitutes with first capacitance electrode 213.2 second capacitance electrodes 223 are electrically connected with second pixel electrode 221 by two contact holes (not indicating) respectively, and first capacitance electrode 213 is electrically connected with first pixel electrode 211 by another contact hole (not indicating), shown in Fig. 4 A.
Hold before describedly,, make coupling capacitance Cx be parallel to the first liquid crystal capacitance Clc1, and second pixel electrode 221 is connected in the first transistor 210 via coupling capacitance Cx because first pixel electrode 211 is directly connected in the first transistor 210.Therefore, can make first pixel electrode 211 have different current potentials by coupling capacitance Cx with second pixel electrode 221.That is to say, make the first liquid crystal capacitance Clc1 have different folder potential differences with the second liquid crystal capacitance Clc2 by coupling capacitance Cx.
Therefore, when unit picture element 20 is done the time spent, the current potential of first pixel electrode 211 is identical with the voltage signal that data line 202 is provided, and the current potential of second pixel electrode 221 is to be provided by capacity coupled mode.Can be by the size of adjusting coupling capacitance Cx, and change the current potential of second pixel electrode 221.
Because first pixel electrode 211 and second pixel electrode, 221 current potentials is different, and two kinds of different electric field intensity of the zone of the liquid crystal layer under two pixel electrodes 240 generation respectively, make the degree difference of lqiuid crystal molecule tipping in two zones.Simultaneously, add the distribution arrangement of the pattern of first pixel electrode 211 and second pixel electrode 221, separating separately is four branch territories, makes the branch territory of single unit picture element 20 be increased to eight branch territories by existing four branch territories.Thus, owing to divide the increases in territories in the unit picture element 20,, great improvement has just been arranged for the problem of colour cast with great visual angle.
In addition, can a transistor seconds 220 be set in above-mentioned unit picture element 20, wherein, this transistor seconds 220 can be selected the more weak transistor of a charging ability.The gate terminal of transistor seconds 220 is connected in sweep trace 201, and source/drain electrode end is connected to the data line 202 and second pixel electrode 221.That is to say that transistor seconds 220 can be opened in response to sweep signal, but and the conducting data line 202 and second pixel electrode 221.Thus, transistor seconds 220 can allow charges accumulated discharges via sweep trace 201 on second pixel electrode 221, and prevents because electric charge is accumulated in second pixel electrode, 221 formed afterimage phenomenon.
Please be simultaneously with reference to Fig. 5, Fig. 6 A and Fig. 6 B, wherein Fig. 5 has shown unit picture element 40 top views of second embodiment of the invention, Fig. 6 A and Fig. 6 B then are respectively the sectional view of 4a-4a ' profile line and 4b-4b ' profile line in the unit picture element 40 of Fig. 5.
As shown in the figure, each unit picture element 40 of liquid crystal panel comprises sweep trace 401, data line 402, the first transistor 410, the first liquid crystal capacitance Clc1, the first storage capacitors Cst1, the second liquid crystal capacitance Clc2 and the second storage capacitors Cst2.
The annexation and the function of each assembly are all roughly the same with first embodiment in this unit picture element 40, and have first pixel electrode 411 independent of each other and second pixel electrode 421 in the unit picture element 40.Please refer to Fig. 5, the distribution arrangement of the pattern of first pixel electrode 411 and second pixel electrode 421, separating separately is four branch territories.Part first pixel electrode 411 and second pixel electrode 421 in each branch territory comprise many strip patterns parallel to each other, and these strip patterns in each divides the territory extend distribution towards same direction.
In the said modules, the first liquid crystal capacitance Clc1 is by first pixel electrode 411, a liquid crystal layer 440, constituted with one first shared electrode 412.Wherein, first shared electrode 412 is formed at upper substrate 400 ends of liquid crystal panel.The first storage capacitors Cst1, by one first capacitance electrode 413, one first dielectric layer 460, constituted with one second shared electrode 414, and this first storage capacitors Cst1 is in parallel with the first liquid crystal capacitance Clc1, and second shared electrode 414 is formed at infrabasal plate (not illustrating) end of liquid crystal panel.
The second liquid crystal capacitance Clc2 is by one second pixel electrode 421, liquid crystal layer 440, constituted with first shared electrode 412.The second storage capacitors Cst2, by second capacitance electrode 423, first dielectric layer 460, constitute with one the 3rd shared electrode 424, and this second storage capacitors Cst2 is in parallel with the second liquid crystal capacitance Clc2.
In addition, please refer to Fig. 6 A and Fig. 6 B, have more one second dielectric layer 470 in the unit picture element 40 between each pixel electrode and each capacitance electrode, that is between the liquid crystal layer 440 and first dielectric layer 460, capacitance electrode 423 is electrically connected with second pixel electrode 421 by contact hole (not indicating), and first capacitance electrode 413 is electrically connected with first pixel electrode 411 by another contact hole (not indicating).
The first storage capacitors Cst1 and the second storage capacitors Cst2, in parallel with the first liquid crystal capacitance Clc1 and the second liquid crystal capacitance Clc2 respectively.First capacitance electrode 413 of the first storage capacitors Cst1 and second capacitance electrode 423 of the second storage capacitors Cst2 all are connected in data line 402 via the first transistor 410, second common electrode 414 of the first storage capacitors Cst1 and the 3rd common electrode 424 of the second storage capacitors Cst2 then can be imported voltage Vcom2, the Vcom3 of varying level respectively, make two storage capacitors have different folder potential differences.
In a second embodiment, because the capacitance of the first storage capacitors Cst1 and the second storage capacitors Cst2 is different, make when unit picture element 40 is opened, because first pixel electrode 411 is different with the current potential that second pixel electrode 421 receives, and the zone of the liquid crystal layer under two pixel electrodes 440 has produced two kinds of different electric field intensity respectively, makes the degree difference of lqiuid crystal molecule tipping in two zones.
Simultaneously, add the distribution arrangement of the pattern of first pixel electrode 411 and second pixel electrode 421, separating separately is four branch territories, makes that the branch territory of single unit picture element 40 is eight branch territories.Thus, owing to divide the increases in territories in the unit picture element 40,, great improvement has just been arranged for the problem of colour cast with great visual angle.
In addition, the current potential and the electric field intensity of first pixel electrode 411 and 421 liang of blocks of second pixel electrode, can see through second common electrode 414 and the 3rd common electrode 424 different level voltage Vcom2, the Vcom3 that import respectively control, and can adjust at the magnitude of voltage of indivedual the bests, with the Dc bias (DC bias) that alleviates two pixel electrodes, improve the phenomenon of image residue (image sticking).
Please be simultaneously with reference to Fig. 7 and Fig. 8, Fig. 9 A and Fig. 9 B, wherein Fig. 7 and Fig. 8 have shown unit picture element 50 top views and the schematic equivalent circuit thereof of third embodiment of the invention respectively, and Fig. 9 A and Fig. 9 B then are respectively the sectional view of 5a-5a ' profile line and 5b-5b ' profile line in the unit picture element 50 of Fig. 7.
As shown in the figure, each unit picture element 50 of liquid crystal panel can be divided into two sub-pixel SP at least.Each unit picture element 50 comprises sweep trace 501, data line 502, the first transistor 510, the 3rd transistor 530, the first liquid crystal capacitance Clc1, the first storage capacitors Cst1, the second liquid crystal capacitance Clc2 and the second storage capacitors Cst2.
Wherein, sweep trace 501 is in order to transmit sweep signal.Data line 502 is in order to transmit voltage signal.The first transistor 510 can open in response to sweep signal, but conducting and transmit voltage signal to first pixel electrode 511.Transistor seconds 520 can open in response to sweep signal, but conducting and transmit voltage signal to second pixel electrode 521.In a preferred embodiment, first pixel electrode 511 and second pixel electrode 521 are directly connected in the first transistor 510 and the 3rd transistor 530 respectively, to receive voltage signal.
The first liquid crystal capacitance Clc1 is by first pixel electrode 511, liquid crystal layer 540, constituted with first shared electrode 512.The above-mentioned first liquid crystal capacitance Clc1 is connected in the first transistor 510, to receive voltage signal.Wherein, first shared electrode 512 is formed at upper substrate 500 ends of liquid crystal panel.
The first storage capacitors Cst1 is by first capacitance electrode 513, first dielectric layer 560, constituted with second shared electrode 514.This first storage capacitors Cst1 is in parallel with the first liquid crystal capacitance Clc1, and is connected in the first transistor 510, to receive voltage signal.As shown in Figure 7, the grid of the first transistor 510 is connected in sweep trace 501, and the source of the first transistor 510/drain electrode one end is connected in data line 502, and the other end then is connected to first pixel electrode 511 and first capacitance electrode 513.
The second liquid crystal capacitance Clc2, by second pixel electrode 521, liquid crystal layer 540, constituted with first shared electrode 512, and the second liquid crystal capacitance Clc2 is coupled to data line 502.Wherein, second pixel electrode 521 is independently of one another with first pixel electrode 511 and can electrically separate, and that is to say that first pixel electrode 511 does not directly contact each other with second pixel electrode 521, and can not electrically conduct maybe not to have the phenomenon that is coupled yet.
The second storage capacitors Cst2, by second capacitance electrode 523, first dielectric layer 560, constitute with one the 3rd shared electrode 524, and in parallel with the second liquid crystal capacitance Clc2.As shown in Figure 7, the grid of the 3rd transistor 530 is connected in sweep trace 501, and the source of the 3rd transistor 530/drain electrode one end is connected in data line 502, and the other end then is connected to second pixel electrode 521 and second capacitance electrode 523.That is to say that the 3rd transistor 530 can be opened in response to sweep signal, voltage signal to the second liquid crystal capacitance Clc2 on conducting and the transmit data line 502 and the second storage capacitors Cst2.
In addition, please refer to Fig. 9 A and Fig. 9 B, have more one second dielectric layer 570 in the unit picture element 50 between each pixel electrode and each capacitance electrode, that is between the liquid crystal layer 540 and first dielectric layer 560.First capacitance electrode 513 is electrically connected with first pixel electrode 511 by contact hole (not indicating), and second capacitance electrode 523 is electrically connected with second pixel electrode 521 by another contact hole (not indicating).
Therefore, each unit picture element 50 has two sub-pixel SP in the third embodiment of the present invention, and each sub-pixel SP includes independently transistor, liquid crystal capacitance, storage capacitors.
Each unit picture element 50 of it should be noted that liquid crystal panel of the present invention has first pixel electrode 511 independent of each other and second pixel electrode 521.Please refer to Fig. 7, the distribution arrangement of the pattern of first pixel electrode 511 and second pixel electrode 521, separating separately is four branch territories.Part first pixel electrode 511 and second pixel electrode 521 in each branch territory comprise many strip patterns parallel to each other, and each divides these strip patterns in the territory to extend distribution towards same direction.
When the sweep trace in the unit picture element 50 501 transmits sweep signal, the first transistor 510 is opened with transistor seconds 520 meeting responding scanning signals, transmit voltage signal to the first pixel electrode 511 and second pixel electrode 521 by data line 502 simultaneously, and drive viewing area separately.At this moment, because second shared electrode 514 of the first storage capacitors Cst1 and the 3rd shared electrode 524 of the second storage capacitors Cst2 can be imported voltage Vcom2, the Vcom3 of varying level, therefore the folder potential difference of two storage capacitors is different in different sub-pixel SP.
Then, after sweep trace 501 stops to transmit sweep signal, further adjust voltage Vcom2, the Vcom3 of second shared electrode 514 and the 3rd shared electrode 524, make it present periodic vibration, and make the liquid crystal layer of each sub-pixel SP produce different potential difference (PD) or electric field via the mode of coupling, and make the angle of liquid crystal molecules tilt produce difference.
Simultaneously, add the distribution arrangement of the pattern of first pixel electrode 511 and second pixel electrode 521, separating separately is four branch territories, can make that just the branch territory of single unit picture element 50 is eight branch territories.Thus, owing to divide the increases in territories in the unit picture element 50,, great improvement has just been arranged, also further reduced the phenomenon of color saturation deficiency (color washout) for the problem of colour cast with great visual angle.
Though the present invention illustrates as above with preferred embodiment, but it is not in order to limit this creation spirit and creation entity, only to terminate in the foregoing description that.Therefore, the modification of being done in not breaking away from spirit of the present invention and scope all should be included in the claims.
Claims (6)
1, a kind of liquid crystal panel of polymer-stabilized alignment comprises:
A plurality of unit picture elements, wherein each this unit picture element has
The one scan line transmits the one scan signal;
One data line transmits a voltage signal;
One the first transistor is opened in response to this sweep signal, and is transmitted this voltage signal;
One first liquid crystal capacitance by one first pixel electrode, a liquid crystal layer, constitute with one first shared electrode, is connected in this first transistor to receive this voltage signal;
One first storage capacitors, in parallel with this first liquid crystal capacitance by one first capacitance electrode, one first dielectric layer, constitute with one second shared electrode, be connected in this first transistor to receive this voltage signal;
One second liquid crystal capacitance by one second pixel electrode, this liquid crystal layer, constitute with this first shared electrode, is coupled to this data line, and wherein this second pixel electrode separates independently of one another and electrically with this first pixel electrode; And
One second storage capacitors, by one second capacitance electrode, this first dielectric layer, constitute with one the 3rd shared electrode, and in parallel with this second liquid crystal capacitance,
Wherein this first pixel electrode has four branch territories, and this first pixel electrode of part in each territory comprises many strip patterns parallel to each other this minute, and each divides those strip patterns in territory to extend distribution along same direction,
Wherein this second pixel electrode has four branch territories, and this second pixel electrode of part in each territory comprises many strip patterns parallel to each other this minute, and each divides those strip patterns in territory to extend distribution along same direction, and
Wherein this unit picture element has more a coupling capacitance, be connected between this first transistor and this second liquid crystal capacitance, first utmost point of this coupling capacitance is connected in the source/drain electrode of the first transistor, and second utmost point of this coupling capacitance is connected to second pixel electrode and second capacitance electrode, makes this first liquid crystal capacitance have different folder potential differences with this second liquid crystal capacitance by this coupling capacitance.
2, liquid crystal panel as claimed in claim 1, wherein above-mentioned unit picture element has more transistor seconds, the gate terminal of this transistor seconds is connected in this sweep trace, and the source/drain electrode end of transistor seconds connects this data line and this second pixel electrode respectively, and this transistor seconds can allow charges accumulated discharges via this sweep trace on this second pixel electrode.
3, liquid crystal panel as claimed in claim 1, wherein this second shared electrode and the 3rd common electrode apply varying level voltage respectively, make this first storage capacitors have different folder potential differences with this second storage capacitors.
4, liquid crystal panel as claimed in claim 1, wherein this unit picture element has more one the 3rd transistor, opens in response to this sweep signal, and conducting also transmits this voltage signal on this data line to this second liquid crystal capacitance and this second storage capacitors.
5, liquid crystal panel as claimed in claim 4, wherein the 3rd transistorized grid is connected in this sweep trace, and the 3rd transistorized source/drain electrode one end is connected in this data line, the other end then is connected to this second pixel electrode and this second capacitance electrode.
6, liquid crystal panel as claimed in claim 1, wherein the grid of this first transistor is connected in this sweep trace, and the source of this first transistor/drain electrode one end is connected in this data line, the other end then is connected to this first pixel electrode and this first capacitance electrode.
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| CNB2006101263550A CN100456115C (en) | 2006-08-30 | 2006-08-30 | Polymer liquid crystal panel with stable orientation |
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| US8416229B2 (en) * | 2007-11-22 | 2013-04-09 | Sharp Kabushiki Kaisha | Liquid crystal display device and manufacturing method thereof |
| TWI382391B (en) | 2008-02-27 | 2013-01-11 | Au Optronics Corp | Method for improving image sticking of lcd |
| CN101241681B (en) * | 2008-03-19 | 2010-12-08 | 友达光电股份有限公司 | Method for improving LCD linear residual shade |
| CN101303500B (en) * | 2008-07-08 | 2010-04-14 | 友达光电股份有限公司 | Liquid crystal display panel and method for manufacturing liquid crystal display panel |
| CN102112911B (en) * | 2008-08-05 | 2014-05-07 | 夏普株式会社 | Liquid crystal display device and method for manufacturing the same |
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| CN104777693B (en) * | 2015-04-28 | 2017-05-03 | 深圳市华星光电技术有限公司 | High-transparency PSVA (polymer-stabilized vertical alignment) type liquid crystal display panel and manufacturing method thereof |
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