CN101587269B - Liquid crystal display device having a plurality of pixel electrodes - Google Patents
Liquid crystal display device having a plurality of pixel electrodes Download PDFInfo
- Publication number
- CN101587269B CN101587269B CN2008100433784A CN200810043378A CN101587269B CN 101587269 B CN101587269 B CN 101587269B CN 2008100433784 A CN2008100433784 A CN 2008100433784A CN 200810043378 A CN200810043378 A CN 200810043378A CN 101587269 B CN101587269 B CN 101587269B
- Authority
- CN
- China
- Prior art keywords
- film transistor
- liquid crystal
- electrode
- pixel electrode
- thin film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 79
- 239000010409 thin film Substances 0.000 claims abstract description 56
- 239000000758 substrate Substances 0.000 claims abstract description 28
- 239000010408 film Substances 0.000 claims description 45
- 238000009413 insulation Methods 0.000 claims description 8
- 230000005684 electric field Effects 0.000 claims description 7
- 239000013078 crystal Substances 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 6
- 238000007600 charging Methods 0.000 description 11
- 229920008347 Cellulose acetate propionate Polymers 0.000 description 8
- 238000009470 controlled atmosphere packaging Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Landscapes
- Liquid Crystal (AREA)
Abstract
The invention discloses a liquid crystal display device, comprising: an upper substrate; the lower substrate is arranged facing the upper substrate, a plurality of gate lines, data lines and a common line are arranged on the lower substrate, the gate lines and the data lines are vertical to each other and define a plurality of pixel areas, and each pixel area further comprises: a pixel electrode; a common electrode arranged alternately with the pixel electrode; a first thin film transistor for controlling the pixel electrode and inputting a signal; a second thin film transistor for controlling the common electrode and inputting a signal; the liquid crystal layer is clamped between the upper substrate and the lower substrate; when the first thin film transistor is turned off, the second thin film transistor is also turned off at the same time. Through the structural design, feed-through potential drop on the whole row of gate lines can be adjusted without the potential provided by the common line, so that the phenomenon of direct current residue is avoided, and the problem of residual shadow is solved fundamentally.
Description
Affiliated technical field
The present invention relates to a kind of liquid crystal indicator, relate in particular to a kind of liquid crystal indicator that can reduce the feedthrough potential drop.
Background technology
IPS (In-plane switch) liquid crystal display pattern is a kind of liquid crystal display pattern of wide viewing angle.Because its viewing angle characteristic is excellent, so, especially show to have obtained in the product using widely at large scale liquid crystal at liquid crystal display product.The IPS technology is a kind ofly in face, to overturn causing different optical path poor according to lateral electric fields through liquid crystal molecule, thereby realizes the different liquid crystal display pattern of transmitance of light.The design of initial IPS liquid crystal display pattern is that the common electrode of strip and pixel electrode are arranged at grade.
The liquid crystal indicator of FFS (Fringe field switch) pattern adopts pixel electrode to separate overlapping arrangement with common electrode clamping insulation course and forms.The FFS pattern solves mainly that the intrinsic aperture opening ratio of IPS pattern is low to cause the few problem of printing opacity, and has reduced power consumption.The two is basic identical on displaying principle, all is to adopt lateral electric fields to realize that the rotation of liquid crystal molecule reaches the effect of demonstration.Than the IPS pattern, the FFS pattern has higher yield in manufacture process, and product has better display effect simultaneously.
The greatest problem that existing IPS pattern and FFS pattern exist is the ghost problem.Along with the increase of display device working time, the electric charge that part is produced by polarization is owing to the existence of current dc component in the pixel is pinned at the dielectric layer surface, particularly, mainly be pinprick on alignment films, thereby make pixel inside can't realize electric neutrality.After the generation direct current was residual, the image of demonstration can change, and promptly produces ghost.
Existing liquid crystal indicator with the FFS pattern is that example is analyzed the reason that its ghost forms.
As shown in Figure 1; And consult Fig. 2; The 3rd liquid crystal indicator 3 of FFS pattern comprises the 3rd upper substrate 300, is towards the 3rd infrabasal plate 310 that is provided with the 3rd upper substrate 300, and is held on the 3rd liquid crystal layer 320 between the 3rd upper substrate 300 and the 3rd infrabasal plate 310.The 3rd infrabasal plate 310 of the 3rd liquid crystal indicator 3 of FFS pattern comprises some the 3rd pixel regions 330.The 3rd pixel electrode 331 of moulding pectination on arbitrary the 3rd pixel region 330 of the 3rd infrabasal plate 310.At the downside of said the 3rd pixel electrode 331, i.e. a side moulding the 3rd common electrode 332 of the 3rd upper substrate 300 dorsad.Said the 3rd pixel electrode 331 and said the 3rd common electrode 332 usefulness the 3rd insulation course 333 intervals.When powering up, form the 3rd lateral electric fields 340 between the 3rd pixel electrode 331 and the 3rd common electrode 332.The liquid crystal molecule of the 3rd liquid crystal layer 320 rotates in face under the effect of said the 3rd lateral electric fields 340, and realizes that image shows.
As shown in Figure 3, and combine to consult Fig. 1, wherein, Fig. 3 is the equivalent circuit theory synoptic diagram of the 3rd liquid crystal indicator 3.In the driving circuit of existing the 3rd liquid crystal indicator 3; Since control the 3rd pixel electrode 331 and for the 3rd thin film transistor (TFT) 350 of its charging in conducting and the potential difference when closing very big; Be widely different between Vgon and the Vgoff; Then in the process of the 3rd thin film transistor (TFT) 350 from the conducting state to the closed condition, the grid potential that is electrically connected at the 3rd thin film transistor (TFT) 350 of the 3rd gate line 360 will change.Define between the source electrode (s) of grid and the 3rd thin film transistor (TFT) 350 of the 3rd thin film transistor (TFT) 350 and form trixenie electric capacity 370.Then trixenie electric capacity 370 electric potential differences also will be with the variation of the grid potential of the 3rd thin film transistor (TFT) 350 and respective change.Wherein, the source electrode of said the 3rd thin film transistor (TFT) 350 (s) equates with the current potential of said the 3rd pixel electrode 331.Trixenie electric capacity 370 is parallelly connected with the 3rd MM CAP 380 and the 3rd liquid crystal capacitance 390 in the 3rd pixel region 330; The variation that then variation of voltage will certainly bring current potential on the 3rd liquid crystal capacitance 390 on the trixenie electric capacity 370, thus the gray level information that shows is exerted an influence.
Please continue to consult Fig. 3; The variation that shows gray scale voltage for fear of the pixel that causes owing to closing of the 3rd thin film transistor (TFT) 350 influences display effect; Common way is to adopt to be adjusted into the 3rd common electrode 332 and to provide the current potential of the 3rd bridging line 334 of electric potential signal to compensate, thereby the GTG signal is not exerted an influence.But this compensation way also will bring new problem: because the 3rd common electrode 332 is consistent in the 3rd infrabasal plate 310; Then can only take the pattern of the 3rd common electrode 332 current potential line frequencies counter-rotatings, the current potential of every row the 3rd pixel electrode 331 is carried out entire compensation.And because the anisotropy of the liquid crystal molecule of the 3rd liquid crystal layer 320, the 3rd pixel region 330 is powered up with situation about not powering up under the DIELECTRIC CONSTANTS of liquid crystal of the 3rd liquid crystal layer 320 be different, and the boundary is between ε ∥ and ε ⊥.When then adopting current potential that same the 3rd bridging line 334 provides that the current potential of the 3rd pixel electrode 331 in the delegation is compensated; Can only carry out accurate revisal to a specific ε value, and the demonstration gray-level characteristic of the pixel of other ε values is just than improving before the revisal.When improving the gray-level characteristic that shows; Since the current potential that provides of aforesaid the 3rd bridging line 334 can only some ε value of revisal the 3rd pixel electrode 331; For the 3rd pixel electrode 331 of other ε values, will receive a long DC voltage component on the 3rd pixel region 330.Though the current potential that the 3rd bridging line 334 provides is the positive-negative polarity counter-rotating; But because the feedthrough potential drop that the potential difference (PD) of the 3rd gate line 360 causes is equidirectional all the time; Then the electric potential signal that provides of the 3rd usefulness line 334 all will move the influence that the 3rd pixel electrode 331 current potentials is caused with revisal feedthrough potential drop to the negative potential direction when positive and negative current potential, and the DC voltage component on the 3rd pixel region 330 produces thus.
See also Fig. 4 (a) and Fig. 4 (b); And Fig. 1 is consulted in combination; Along with the increase of 3 working times of the 3rd liquid crystal indicator of FFS pattern, the electric charge that part is produced by polarization is owing to the existence of current dc component between the 3rd upper substrate 300 and the 3rd infrabasal plate 310 is pinned at the dielectric layer surface, particularly; Mainly be pinned on the alignment films (not shown) of the 3rd upper substrate 300, thereby make the 3rd liquid crystal indicator 3 inside of FFS pattern can't realize electric neutrality.After the generation direct current was residual, the image of demonstration can change, and promptly produces ghost.
Please continue to consult Fig. 4 (a) and Fig. 4 (b), the concrete reason that ghost occurs is shown as example with normally white and can analyzes and be: exist under the residual situation of direct current since white portion 410 need not apply voltage black pattern part 420 then need apply voltage.After after a while, black pattern part 420 ions that apply voltage are pinned on the dielectric surface, and white portion 410 ions that do not apply voltage do not move to dielectric surface.Expectation originally can demonstrate the identical full grey screen 430 of GTG after applying identical voltage this moment; But black pattern part 420 is owing to the residual internal electric field of direct current has changed the effect that applies voltage; White portion 410 and black pattern part 420 before in grey screen 430, can finding out also can be described as last picture and have stayed ghost.
To the existing in prior technology problem, this case designer relies on the industry experience for many years of being engaged in, and the active research improvement is so there has been the generation of liquid crystal indicator of the present invention.
[prior art]
The 3rd liquid crystal indicator 3
The 3rd upper substrate 300 the 3rd infrabasal plate 310
The 3rd liquid crystal layer 320 the 3rd pixel region 330
The 3rd pixel electrode 331 the 3rd common electrode 332
The 3rd insulation course 333 the 3rd bridging line 334
The 3rd lateral electric fields 340 the 3rd thin film transistor (TFT) 350
The 3rd gate line 360 trixenie electric capacity 370
The 3rd MM CAP 380 the 3rd liquid crystal capacitance 390
Ash color part 430
[the present invention]
First liquid crystal indicator 1
First common electrode, 115 first insulation courses 116
First stray capacitance, 131 second thin film transistor (TFT)s 140
Second stray capacitance, 141 bridging lines 150
Liquid crystal capacitance 160 MM CAPs 170
Second liquid crystal indicator 2
Second pixel electrode, 214 second common electrodes 215
Summary of the invention
The objective of the invention is provides a kind of liquid crystal indicator that can reduce the feedthrough potential drop to the defective that prior art exists.
Said liquid crystal indicator comprises: upper substrate; Infrabasal plate is towards setting with upper substrate, and many gate lines, data line and bridging line are set on infrabasal plate, and said many gate lines are perpendicular to one another with said many data lines and define some pixel regions, and each pixel region further comprises: pixel electrode; Common electrode is staggered with pixel electrode; The first film transistor is in order to control pixel electrode and input signal; Second thin film transistor (TFT) is in order to control common electrode and input signal; Liquid crystal layer is held between upper substrate and the infrabasal plate; Wherein, when said the first film transistor turn-offed, said second thin film transistor (TFT) also turn-offed simultaneously.
As stated; Structural design through this liquid crystal indicator; When closing the first film transistor and second thin film transistor (TFT) at the same time, promptly the current potential of gate line when Vgon changes to Vgoff, the equal and opposite in direction of the feedthrough potential drop that the feedthrough potential drop that is produced by the first film transistor and second thin film transistor (TFT) produce; It is the identical size of current potential decline of current potential with the common electrode of the pixel electrode in the pixel region; And then the current potential that does not need to provide through bridging line again regulates the feedthrough potential drop on the full line gate line, so can not produce the residual phenomenon of direct current, promptly fundamentally solved the problem of ghost; And can realize compensating to each pixel, avoid existing compensation method to compensate and the compensation that brings problem accurately not entire row of pixels.
Description of drawings
Fig. 1 is the diagrammatic cross-section of existing FFS mode LCD.
Fig. 2 is the perspective view of a pixel on the infrabasal plate of existing FFS mode LCD.
Fig. 3 is the equivalent circuit theory synoptic diagram of existing FFS mode LCD.
Fig. 4 (a) and the synoptic diagram of Fig. 4 (b) for existing FFS mode LCD generation ghost after working long hours.
Fig. 5 is the diagrammatic cross-section of FFS mode LCD of the present invention.
Fig. 6 is the perspective view of the infrabasal plate of FFS mode LCD of the present invention.
Fig. 7 is electrode structure synoptic diagram that pixel region is interior on the infrabasal plate of FFS mode LCD of the present invention.
Fig. 8 is the side view of the infrabasal plate of FFS mode LCD of the present invention.
Fig. 9 is the equivalent circuit theory figure of FFS mode LCD of the present invention.
Figure 10 is electrode structure synoptic diagram that pixel region is interior on the infrabasal plate of IPS mode LCD of the present invention.
Figure 11 is the perspective view of IPS mode LCD of the present invention.
The description of reference numerals of each assembly is following among the figure:
Embodiment
By specifying technology contents of the present invention, structural attitude, being reached purpose and effect, will combine embodiment below and cooperate graphic the detailed description.
First embodiment
See also Fig. 5; And Fig. 6 is consulted in combination; First liquid crystal indicator 1 of FFS (Fringe field switch) pattern comprises upper substrate 100, is towards the infrabasal plate 110 that is provided with upper substrate 100, and is held on the liquid crystal layer 120 between said upper substrate 100 and the said infrabasal plate 110.On the infrabasal plate 110 of first liquid crystal indicator 1, arranging some orthogonal data lines 111 and gate line 112.Said data line 111 and the some pixel regions 113 of said gate line 112 definition.
See also Fig. 7, and combine to consult Fig. 5 and Fig. 9, wherein, Fig. 9 is the equivalent circuit theory figure of first liquid crystal indicator 1 of FFS pattern.Moulding pectination first pixel electrode 114 in each pixel region 113 of infrabasal plate 110.Pectination first pixel electrode 114 electrically connects with the first film transistor 130.The electric capacity that forms between the grid of definition the first film transistor 130 and the source electrode (s) of the first film transistor 130 is first stray capacitance 131.After powering up, the first film transistor 130 usefulness are thought 114 chargings of pectination first pixel electrode.At the downside of pectination first pixel electrode 114, promptly a side of the liquid crystal layer dorsad 120 of first pixel electrode 114 forms some first common electrodes 115 at interval corresponding to each pixel region 113.Between first common electrode 115 and first pixel electrode 114 with first insulation course 116 at interval.First common electrode 115 and second thin film transistor (TFT) 140 electrically connect.Defining the electric capacity that forms between the source electrode (s) of grid and second thin film transistor (TFT) 140 of second thin film transistor (TFT) 140 is second stray capacitance 141.The equal and opposite in direction of the size of second stray capacitance 141 of said second thin film transistor (TFT) 140 and first stray capacitance 131 of said the first film transistor 130.After powering up, in each pixel region 113, second thin film transistor (TFT) 140 is 113 chargings of first common electrode.Simultaneously, first common electrode 115 of said interval formation thinks that with usefulness first common electrode 113 provides the bridging line 150 of electric potential signal to electrically connect.
Please continue to consult Fig. 7, and combine to consult Fig. 8, wherein, Fig. 7 shows the electrode structure synoptic diagram in one of them pixel region 113 of infrabasal plate 110.Moulding pectination first pixel electrode 114 in each pixel region 113 of infrabasal plate 110.Pectination first pixel electrode 114 electrically connects with the first film transistor 130.Wherein, the grid of the first film transistor 130 and gate line 112 electrically connect.The source electrode of the first film transistor 130 (s) electrically connects with first pixel electrode 114.The drain electrode of the first film transistor 140 (d) electrically connects with data line 111.After powering up, the first film transistor 130 usefulness are thought 114 chargings of pectination first pixel electrode.At the downside of pectination first pixel electrode 114, promptly a side of the liquid crystal layer dorsad 120 of first pixel electrode 114 forms some first common electrodes 115 at interval corresponding to each pixel region 113.Between first common electrode 115 and first pixel electrode 114 with first insulation course 116 at interval.First common electrode 115 and second thin film transistor (TFT) 140 electrically connect.Wherein, the grid of second thin film transistor (TFT) 140 and gate line 112 electrically connect.The source electrode of second thin film transistor (TFT) 140 (s) electrically connects with first common electrode 115.The drain electrode of second thin film transistor (TFT) 140 (d) electrically connects with bridging line 150.After powering up, second thin film transistor (TFT), 140 usefulness are thought 115 chargings of first common electrode.
See also Fig. 9, Fig. 9 is the equivalent circuit theory synoptic diagram of first liquid crystal indicator 1 of FFS (Fringe field switch) pattern.Wherein, first liquid crystal indicator 1 comprises liquid crystal capacitance 160 and MM CAP 170.Liquid crystal capacitance 160, MM CAP 170, first stray capacitance 131 and second stray capacitance 141 connect for parallel way.Wherein first stray capacitance 131 and second stray capacitance, 141 equal and opposite in directions.
Through above-mentioned design; When the first film transistor 130 during from conducting state to closed condition; Be that current potential on the gate line 112 is when Vgon changes to Vgoff; While control corresponding second thin film transistor (TFT) 140; Particularly, promptly simultaneously second thin film transistor (TFT) 140 also is changed to closed condition from conducting state, the feedthrough potential drop that then produces because of first stray capacitance 131 of the first film transistor 130 and the feedthrough potential drop equal and opposite in direction of second stray capacitance, 141 generations of second thin film transistor (TFT) 140.The current potential that has solved because of utilizing bridging line 150 to provide carries out the direct current ghost problem that revisal brought to the size of the current potential decline of liquid crystal capacitance 160; And can realize compensating to each pixel, avoid existing compensation method to compensate and the compensation that brings problem accurately not entire row of pixels.
In the driving circuit of first liquid crystal indicator 1, electrically connect with the first film transistor 130 of thinking 114 chargings of first pixel electrode and data line 111.Second thin film transistor (TFT) 140 with thinking 115 chargings of first common electrode electrically connects with bridging line 150.And the current potential of the current potential of said bridging line 150 and data line 111 varies in size, thereby for each pixel region 113, the feedthrough potential drop size that is produced also is not quite similar.Particularly; In current driving mode; The common voltage that connecting the bridging line 150 of first common electrode 115 is provided all adopts the line frequency counter-rotating with the gray scale voltage of the data line that is connected first pixel electrode 114 111, and common voltage is identical with the interval range of gray scale voltage variation.In the case, after said FFS pattern first liquid crystal indicator 1 work one period considerable time, then the mean value of the current potential of bridging line 150 is identical with the mean value maintenance of the current potential of data line 111.For example, the scope of gray scale voltage is 0V～5V, and common voltage also changes according to the mode of 0V～5V～0V～5V, and at this moment, the mean value of its current potential is 2.5V.Then this owing to carry out down for the phenomenon that work caused in that direct current is residual for a long time for the direct current ghost, first common electrode 115 in the pixel region 113 and the feedthrough potential drop of first pixel electrode 114 are consistent.When having the feedthrough potential drop to produce, the electric potential difference in liquid crystal capacitance 160 and the MM CAP 170 will not change.Promptly when the first film transistor 130 and second thin film transistor (TFT) 140 during simultaneously from conducting state to closing state; First stray capacitance 121 of the first film transistor 120 changes; Second stray capacitance 141 of second thin film transistor (TFT) 140 also changes, and its variation is consistent.Thereby the feedthrough potential drop in each pixel region 113 of compensation that can be independent.In each pixel region 113; After feedthrough potential drop in each pixel region 113 obtains independent compensation; No longer need regulate the feedthrough potential drop on the full line gate line 112 through the current potential that bridging line 150 provides; So can not produce the residual phenomenon of direct current, promptly fundamentally solve the problem of ghost.
Second embodiment
With reference to Fig. 9, Figure 10 and Figure 11 the second embodiment of the present invention is described below.Second embodiment is that with the different of first embodiment liquid crystal indicator of second embodiment is the liquid crystal indicator of IPS pattern.Use identical Reference numeral with part identical among first embodiment, and repeat no more at this.
See also Figure 10; And Figure 11 is consulted in combination; Second liquid crystal indicator 2 of IPS (In Plane Switching) pattern comprises upper substrate 100, is towards the infrabasal plate 110 that is provided with upper substrate 100, and is held on the liquid crystal layer 120 between said upper substrate 100 and the said infrabasal plate 110.On the infrabasal plate 110 of liquid crystal indicator 2, arranging some orthogonal data lines 111 and gate line 112.Said data line 111 and the some pixel regions 113 of said gate line 112 definition.
Please continue to consult Figure 10, at interval moulding pectination second pixel electrode 214 and second common electrode 215 in the copline of each pixel region 113 of infrabasal plate 110.Wherein, pectination second pixel electrode 214 electrically connects with the first film transistor 130.The electric capacity that forms between the grid of definition the first film transistor 130 and the source electrode (s) of the first film transistor 130 is first stray capacitance 131.After powering up, the first film transistor 130 usefulness are thought 214 chargings of pectination second pixel electrode.With pectination second pixel electrode, 214 coplanes and some second common electrodes 215 that form at interval and 140 electric connections of second thin film transistor (TFT).Defining the electric capacity that forms between the source electrode (s) of grid and second thin film transistor (TFT) 140 of second thin film transistor (TFT) 140 is second stray capacitance 141.First stray capacitance 131 of the size of second stray capacitance 141 of said second thin film transistor (TFT) 140 and said the first film transistor 130 big or small identical.After powering up, in each pixel region 113, second thin film transistor (TFT) 140 is 215 chargings of second common electrode.Simultaneously, second common electrode 215 of said interval formation thinks that with usefulness second common electrode 215 provides the bridging line 150 of electric potential signal to electrically connect.
Please continue to consult Figure 10, moulding pectination second pixel electrode 214 in each pixel region 113 of infrabasal plate 110.Pectination second pixel electrode 214 electrically connects with the first film transistor 130.Wherein, the grid of the first film transistor 130 and gate line 112 electrically connect.The source electrode of the first film transistor 130 (s) electrically connects with second pixel electrode 214.The drain electrode of the first film transistor 140 (d) electrically connects with data line 111.After powering up, the first film transistor 130 usefulness are thought 214 chargings of pectination second pixel electrode.With pectination second pixel electrode, 214 coplanes and some second common electrodes 215 that form at interval and 140 electric connections of second thin film transistor (TFT).Wherein, the grid of second thin film transistor (TFT) 140 and gate line 112 electrically connect.The source electrode of second thin film transistor (TFT) 140 (s) electrically connects with second common electrode 215.The drain electrode of second thin film transistor (TFT) 140 (d) electrically connects with bridging line 150.After powering up, second thin film transistor (TFT), 150 usefulness are thought 215 chargings of second common electrode.
See also Fig. 9, Fig. 9 also is the equivalent circuit theory synoptic diagram of second liquid crystal indicator 2 of IPS (In Plane Switching) pattern.Wherein, second liquid crystal indicator 2 comprises liquid crystal capacitance 160 and MM CAP 170.Liquid crystal capacitance 160, MM CAP 170, first stray capacitance 130 and second stray capacitance 141 connect for parallel way.Wherein first stray capacitance 131 and second stray capacitance, 141 equal and opposite in directions.
Through above-mentioned design; When the first film transistor 130 during from conducting state to closed condition; Be that current potential on the gate line 112 is when Vgon changes to Vgoff; While control corresponding second thin film transistor (TFT) 140; Particularly, promptly simultaneously second thin film transistor (TFT) 140 also is changed to closed condition from conducting state, the feedthrough potential drop that then produces because of first stray capacitance 131 of the first film transistor 130 and the feedthrough potential drop equal and opposite in direction of second stray capacitance, 141 generations of second thin film transistor (TFT) 140.Solved the direct current ghost problem of being brought when utilizing bridging line 150 to carry out revisal.
In sum; Structural design through this liquid crystal indicator; When closing the first film transistor and second thin film transistor (TFT) at the same time, promptly the current potential of gate line when Vgon changes to Vgoff, the equal and opposite in direction of the feedthrough potential drop that the feedthrough potential drop that is produced by the first film transistor and second thin film transistor (TFT) produce; It is the identical size of current potential decline of current potential with the common electrode of the pixel electrode in the pixel region; And then the current potential that does not need to provide through bridging line again regulates the feedthrough potential drop on the full line gate line, so can not produce the residual phenomenon of direct current, promptly fundamentally solved the problem of ghost.Simultaneously, owing to compensate, can compensate more accurately to each pixel.
Those skilled in the art all should be appreciated that, under the situation that does not break away from the spirit or scope of the present invention, can carry out various modifications and modification to the present invention.Thereby, if when any modification and modification fall in the protection domain of appended claims and equivalent, think that the present invention contains these modifications and modification.
Claims (7)
1. liquid crystal indicator comprises:
Upper substrate;
Infrabasal plate is towards setting with upper substrate, and many gate lines, data line and bridging line are set on infrabasal plate, and said many gate lines are perpendicular to one another with said many data lines and define some pixel regions, and each pixel region further comprises:
Pixel electrode;
Common electrode is staggered with pixel electrode;
The first film transistor, the control pixel electrode is thought the pixel electrode input signal, and the transistorized grid of said the first film connects gate line, and the first film transistor drain is connected to data line, and the transistorized source electrode of the first film is electrically connected with pixel electrode;
Second thin film transistor (TFT), the control common electrode is thought the common electrode input signal, and the grid of said second thin film transistor (TFT) connects gate line, and the drain electrode of second thin film transistor (TFT) is connected to bridging line, and the source electrode of second thin film transistor (TFT) and common electrode electrically connect;
Liquid crystal layer is held between upper substrate and the infrabasal plate;
Liquid crystal capacitance is formed between pixel electrode and the common electrode;
MM CAP is formed between pixel electrode and the common electrode;
Wherein, When said the first film transistor turn-offs; Said second thin film transistor (TFT) also turn-offs simultaneously; And when turn-offing the first film transistor and second thin film transistor (TFT), the stray capacitance that between the stray capacitance that produces between the first film transistor gate and the source electrode and the second film crystal tube grid and source electrode, produces equates.
2. liquid crystal indicator according to claim 1, wherein, the dielectric anisotropy of the liquid crystal molecule of liquid crystal layer is for just.
3. liquid crystal indicator according to claim 1, wherein, when not powering up, liquid crystal molecule is parallel to upper substrate and infrabasal plate is arranged.
4. liquid crystal indicator according to claim 1, wherein, said common electrode and said pixel electrode are formed on different layers, and between pixel electrode and common electrode, insulation course are set.
5. liquid crystal indicator according to claim 1 wherein, is respectively said common electrode and said pixel electrode is formed on identical layer, and between pixel electrode and common electrode, insulation course is set.
6. the liquid crystal indicator of stating according to claim 4 or claim 5, wherein, said common electrode and said pixel electrode apply unlike signal, between upper substrate and infrabasal plate, to form lateral electric fields.
7. liquid crystal indicator according to claim 1, wherein, when turn-offing the first film transistor and second thin film transistor (TFT), on the data line with bridging line on the signal frequency imported identical, and mean value is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100433784A CN101587269B (en) | 2008-05-20 | 2008-05-20 | Liquid crystal display device having a plurality of pixel electrodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100433784A CN101587269B (en) | 2008-05-20 | 2008-05-20 | Liquid crystal display device having a plurality of pixel electrodes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101587269A CN101587269A (en) | 2009-11-25 |
| CN101587269B true CN101587269B (en) | 2012-01-18 |
Family
ID=41371569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100433784A Active CN101587269B (en) | 2008-05-20 | 2008-05-20 | Liquid crystal display device having a plurality of pixel electrodes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101587269B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102402960A (en) * | 2011-12-02 | 2012-04-04 | 深圳市华星光电技术有限公司 | Drive circuit, liquid crystal panel module, liquid crystal display device and drive method |
| CN105446035B (en) * | 2015-12-04 | 2019-05-14 | 昆山龙腾光电有限公司 | Liquid crystal display panel |
| CN107331342A (en) * | 2017-08-25 | 2017-11-07 | 京东方科技集团股份有限公司 | Dot structure and its driving method, display device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004086343A1 (en) * | 2003-03-26 | 2004-10-07 | Semiconductor Energy Laboratory Co., Ltd. | Device substrate and light-emitting device |
| CN1713261A (en) * | 2004-06-21 | 2005-12-28 | 钰瀚科技股份有限公司 | Method and device for removing image fuzzy overlap between frames |
| CN201392443Y (en) * | 2008-10-07 | 2010-01-27 | 上海天马微电子有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
-
2008
- 2008-05-20 CN CN2008100433784A patent/CN101587269B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004086343A1 (en) * | 2003-03-26 | 2004-10-07 | Semiconductor Energy Laboratory Co., Ltd. | Device substrate and light-emitting device |
| CN1713261A (en) * | 2004-06-21 | 2005-12-28 | 钰瀚科技股份有限公司 | Method and device for removing image fuzzy overlap between frames |
| CN201392443Y (en) * | 2008-10-07 | 2010-01-27 | 上海天马微电子有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101587269A (en) | 2009-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9252282B2 (en) | Thin film transistor array substrate and liquid crystal display device | |
| CN103400563B (en) | Array substrate and liquid crystal display device | |
| CN105551446B (en) | The driving method of liquid crystal display panel | |
| US9478566B2 (en) | Array substrate, LCD device and driving method | |
| CN103454823B (en) | A kind of array base palte and display panels | |
| US20100073273A1 (en) | Liquid crystal panel and liquid crystal display device having the same | |
| KR20100128803A (en) | Liquid crystal display | |
| KR20080010987A (en) | Liquid crystal display | |
| US9733535B2 (en) | Array substrate, liquid crystal display panel and display device | |
| US11333945B2 (en) | Display panel and display apparatus | |
| CN105372892A (en) | Array substrate and liquid crystal display panel | |
| US20150261053A1 (en) | Liquid crystal panel and display device | |
| CN201392443Y (en) | Liquid crystal display device having a plurality of pixel electrodes | |
| USRE47907E1 (en) | Liquid crystal display | |
| JPH07311390A (en) | Liquid crystal display device | |
| WO2016201786A1 (en) | Driving method, driving device and display device | |
| CN101587269B (en) | Liquid crystal display device having a plurality of pixel electrodes | |
| EP2998785A1 (en) | Liquid crystal display panel and driving method therefor | |
| KR101278003B1 (en) | Liquid crystal display pannel and driving method thereof | |
| US20080122775A1 (en) | Display apparatus | |
| CN106773402A (en) | Array base palte and liquid crystal display panel | |
| CN114740662B (en) | Array substrate, display panel and display device | |
| JPH02242228A (en) | Liquid crystal display device | |
| US9905178B2 (en) | Liquid crystal display apparatus and method of driving thereof | |
| WO2017130293A1 (en) | Liquid crystal display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |