CN1782823A - Liquid crystal display device - Google Patents
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- CN1782823A CN1782823A CN 200510124379 CN200510124379A CN1782823A CN 1782823 A CN1782823 A CN 1782823A CN 200510124379 CN200510124379 CN 200510124379 CN 200510124379 A CN200510124379 A CN 200510124379A CN 1782823 A CN1782823 A CN 1782823A
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Abstract
An orientation controller which divides a pixel into a plurality of different priority alignment regions and an additional orientation controller are provided in a pixel. The additional orientation controller is provided at least at an end of a pixel of a long-side alignment region formed along the long side of the pixel among the divided alignment regions, for example, around a center position of the long side of the pixel. The additional orientation controller can be realized, for example, by forming a cutout pattern in a side of a first electrode (pixel electrode) forming a part of the pixel. Because the alignment direction is also controlled by the additional orientation controller, the alignment of liquid crystal in this region is stabilized.
Description
Technical field
The present invention is about a kind of liquid crystal indicator with orientation control part of cutting apart the LCD alignment direction in same pixel region.
Background technology
Liquid crystal indicator (the following LCD that claims herein) because of possessing characteristics such as slimming and low power consumption, is widely used in the screen of computer screen or portable information equipment at present.These LCD enclose liquid crystal between two plate bases, utilize formed electrode on substrate separately, control the direction of ad-hoc location liquid crystal therebetween, and show.
TN (Twisted Nematic, twisted nematic) type liquid crystal is known as the employed liquid crystal of this type of LCD.Using the LCD of TN type liquid crystal is the surface that two plate bases are contacted with liquid crystal, (rubbing) processing rub earlier separately to form alignment film, do not applying under the state of voltage, TN liquid crystal with positive dielectric anisotropy, the major axis of its liquid crystal molecule are to form the initial stage orientation along the alignment film frictional direction.Only, the initial stage orientation of this liquid crystal is not fully along the plane of substrate, and the major axis of liquid crystal molecule is along the plane of substrate with the angle reserved in advance on one's feet, promptly so-called tilt angle (pre-tilt).
Wherein the direction of alignment film friction on the direction of the friction of the alignment film on the plate base and another plate base substrate is to dispose alternately with the torsional direction that deviation 90 is spent, and the liquid crystal orientation then thereby is thereupon turned round and turn 90 degrees between a pair of (two) substrate.And with the electrode of each self-forming on the two plate base faces, during to therebetween liquid crystal applied voltages, the major axis of liquid crystal molecule can upwards be stood towards the normal direction of base plan, thereby removes the state that reverses orientation.
Be to be provided with the vertical each other linear Polarizer of polarizing axis on two plate bases, and the frictional direction of alignment film is a polarizing axis direction of setting Polarizer on institute's counterpart substrate for.Thus, do not applying under the situation of voltage, linear polarisation when light source, during by the Polarizer incident liquid crystal layer that is disposed near the substrate of source ends, the polarizing axis of its linear polarisation can be changed into the linear polarisation that just in time differs 90 degree via the liquid crystal layer that is reversed orientation 90 degree, cooperate the Polarizer that only can make with above-mentioned incident end that disposes on another plate base, the polarizing axis direction differs the Polarizer that the 90 linear polarisations of spending pass through, and the light that is sent by light source then presents white state through LCD.Relatively, electrode is asked when applying voltage, the orientation of reversing of liquid crystal is to remove fully, liquid crystal molecule is the normal direction towards base plan, linear polarisation by source ends incident liquid crystal layer, can not arrive changing polarization direction when the liquid crystal layer on another plate base on Polarizer, thereby the last Polarizer of the polarizing axis of its linear polarisation and bright dipping end is inconsistent, so can't be through the Polarizer of bright dipping end.Thereby, present black state.And middle gray scale states is that this liquid crystal is applied the voltage that orientation is not exclusively eliminated that reverses that makes liquid crystal layer, and a part of linear polarisation in the linear polarisation of incident liquid crystal layer become the contrary linear polarisation that turn 90 degrees of polarizing axis and last Polarizer by the bright dipping end, thereby present adjustable light quantity.
In addition, the known LCD that use vertical orientation (Vertically Aligned) type liquid crystal (title VA liquid crystal herein) also arranged.About this VA liquid crystal, liquid crystal itself is to have as negative dielectric anisotropy, and the long axis direction that does not apply the liquid crystal molecule of voltage is towards vertical direction (normal direction of base plan) by the vertical orientation film.The LCD that uses this VA liquid crystal is provided with the Polarizer that polarizing axis differs 90 degree each other on a pair of substrate.Under the state that does not apply voltage, linear polarisation by the Polarizer incident liquid crystal layer that is disposed at the source ends substrate, because liquid crystal is a vertical orientation, can in liquid crystal layer, not produce birefringence (birefringence), thereby be to keep this polarized condition to arriving the Polarizer that is positioned at the display surface substrate, and because of seeing through the Polarizer on this display surface substrate, be to present black state.Apply voltage between electrode, then the molecular long axis of VA liquid crystal is to topple over towards the base plan direction.Because the VA liquid crystal is to have negative optics anisotropy (refringenceanisotropy), the short-axis direction of liquid crystal molecule can become the normal direction towards base plan, linear polarisation by source ends incident liquid crystal layer is to be subjected to this liquid crystal layer birefringence, and linear polarisation can become elliptical polarized light or even rotatory polarization and oval linear hybrid polarisation (two kinds of polarisations all have the polarizing axis that differs 90 degree with the linear polarisation of incident) after entering liquid crystal layer.Therefore, if the linear polarisation of institute's incident all become the contrary linear polarisation that turn 90 degrees via the birefringence of liquid crystal layer, but light is the Polarizer on the transmission display face substrate, and presents white (high-high brightness) state.Double refraction amount is the toppling direction that depends on liquid crystal molecule.Therefore, the linear polarisation of incident is according to double refraction amount, and the elliptical polarized light, rotatory polarization or the polarizing axis that become identical polarizing axis differ the elliptical polarized light of 90 degree, and the transmittance of bright dipping end Polarizer is to decide according to this polarized condition, in order to do gray scale states in the middle of presenting.
Aforesaid TN type LCD is that its long axis of liquid crystal molecule direction of may command is by standing to certain angle with respect to the angle of base plan direction pre-dumping (pre-tilt), shown in Figure 1A, when TNLCD was observed by upper right side among the figure, the inclination when observing for the inclination of observer's liquid crystal molecule and by the upper left side was that very big difference is arranged.Therefore, the visual angle interdependence of TN liquid crystal is quite big, causes colourity easily or shows counter-rotating etc.That is when being known in normal demonstration, its observable visual angle is very narrow.
Therefore, be to enlarge the visual angle, the direction of the LCD alignment that Japanese patent laid-open 7-311383 communique for example etc. disclosed is arranged, or change speech, the orientation control part is formed in the single pixel, and in single pixel region, cuts apart the orientation of long axis of liquid crystal molecule direction (liquid crystal direct).
On the other hand, the VA liquid crystal is shown in Figure 1B, and the initial stage orientation is the normal direction towards substrate 100, no matter by the upper right side of figure to observation, or by the upper left side of figure to observation, very little for the differential seat angle of the inclination of this direction liquid crystal molecule.Therefore, with above-mentioned TN liquid crystal by comparison, its visual angle interdependence is lower on the principle.That is, have the feature of wide viewing angle.Yet, the VA liquid crystal when applying voltage since can't determine fully the orientation that liquid crystal molecule falls down by vertical direction (the orientation vector, vector), can cause border (singular regions, disclination) problem that can't be certain of orientation orientation zones of different in the single pixel region.For pixel, or after after a while,, then can produce shaggy demonstration, and cause reducing display quality if the position of this singular regions changes.
So, for the VA liquid crystal, in above-mentioned patent documentation, also be provided in the orientation control part is set in the single pixel, reach whereby with this orientation cutting part fixedly singular regions, more enlarge the visual angle, and promote the purpose of display quality.
Direction by above-mentioned orientation control part control liquid crystal molecule initial stage orientation prevents that not only singular regions from producing in nonspecific position, and can reach the purpose that enlarges the visual angle, only still has more to promote display quality and promote reactive requirement.
Summary of the invention
The present invention realizes the technology of excellent orientation control part.
In the 1st aspect of the present invention, liquid crystal indicator is with the 1st substrate with the 1st electrode and the electrode forming surface folder liquid crystal layer separately of the 2nd substrate with the 2nd electrode therebetween and the subtend configuration, and each pixel region is polygon and possesses orientation control part in order to the orientation orientation of control liquid crystal; By aforementioned orientation control part pixel region is divided into most orientations zone and in this majority orientation zone in the orientation zone consistent, its end, also is provided with the additional alignment control part in the aforesaid end of aforementioned pixel region with the end of each pixel region.
In other aspect of the present invention, one of them is the substantial middle place that is formed at the aforesaid end of the aforementioned pixel region that constitutes aforementioned orientation zone at least in the aforementioned additional alignment control part.
This additional alignment control part is the substantial middle place that can be arranged at longest edge in the edge of each pixel region.This additional alignment control part is to be provided with to the interior side-prominent of pixel region by the limit of each pixel region.
In another aspect of the present invention, aforementioned pixel region is a rectangle, and aforementioned orientation control part has straight line portion that the long side direction with respect to aforementioned pixel region extends in parallel, and the V word section branch that extends toward the corner direction or the side directions of aforementioned pixel region of line part two ends thus, and aforementioned additional alignment control part is the long limit end that is arranged at aforementioned pixel region.
The additional alignment control part can be by being cut into breach corresponding to the part of the electrode of the shape of each pixel region shape and constituting.The shape of breach is for example to can be: triangle or trapezoidal.
Another aspect of the present invention, be the electrode forming surface folder liquid crystal layer subtend configuration therebetween separately of the 1st substrate with the 1st electrode and the 2nd substrate with the 2nd electrode, and the liquid crystal indicator that has the pixel of rectangular configuration in display part, in each pixel, respectively be provided with and have the different most orientations zone of preferred orientation direction being divided in 1 pixel region, the indivedual polygon patterns that form with respect to each aforementioned pixel of aforementioned the 1st electrode, and the edge of the 1st electrode is the function that has as the some of aforementioned orientation control part, in aforementioned the 1st electrode near the edge that is less than long side direction, with respect to the specific orientation zone of being cut apart by aforementioned orientation control part, be formed with additional alignment control part in order near the orientation stable its central authorities.
Except each pixel region being divided into the orientation control part in most orientations zone, can take place in nonspecific position to suppress the wire singular regions, and reach the purpose that promotes display quality by the additional alignment control part in addition.
Description of drawings
Figure 1A, 1B represent that the orientation state of liquid crystal molecule and the pass between the visual angle are.
Fig. 2 is the summary section of the invention process form liquid crystal indicator;
Fig. 3 A represents the planar configuration of one of them pixel of liquid crystal indicator in the invention process form;
Among Fig. 3 B presentation graphs 3A along the profile construction of the 1st substrate-side of A-A line;
Fig. 4 represents the planar configuration of one of them pixel of liquid crystal indicator in another example of the present invention;
Fig. 5 represents the present invention's planar configuration of one of them pixel of liquid crystal indicator in another example again;
Fig. 6 represents the present invention's planar configuration of one of them pixel of liquid crystal indicator in another example again.
[primary clustering symbol description]
100 the 1st substrates, 110 active layers
112 gate insulators, 114 gate electrodes
116 interlayer insulating film 118s source electrodes
118d leaks level electrode 120 planarization insulating layers
130 reflection horizon 200 the 1st electrode
260 alignment films 300 the 2nd substrate
320 the 2nd electrodes, 330 light shield layers
400 liquid crystal layers, 410 long axis of liquid crystal molecule directions
500 orientation control parts
510,512 orientation control parts (jut)
514 juts, 530 orientation control parts (electrodeless portion)
540,570 straight line portioies
550,552,580,582V character segment
560,572 additional alignment control parts
600,602,604,606 pixels, 610,612 reflector spaces
620, orientation zone, 622 penetration region, 630 long limit
Orientation zone, 650 top, 640 following orientation zone
Embodiment
Below, cooperate drawing that example of the present invention is described.Fig. 1 is that the summary section that shows the invention process form LCD constitutes.Fig. 1 is the summary section that shows the penetration region of so-called semi penetration type LCD, and semi penetration type LCD has in a pixel that the light source light of making penetrates and the penetration region that shows and make external light reflection and the reflector space that shows.
The shown LCD of Fig. 2 is that transparent (for example: 300 of the 1st substrate 100 glass substrate etc.) and the 2nd substrates are enclosed liquid crystal layer 400 and formed in two, each substrate 100,300 on the face of liquid crystal layer 400, be to be formed with separately by tin indium oxide (Indium Tin Oxide, ITO) or indium zinc oxide (Indium Zinc Oxide, IZO) the 1st electrode 200 and the 2nd electrode 320 that waits the transparent conductive metal material to be constituted.In addition, light source light is penetrated and the penetrating type LCD that shows also constitutes with the profile construction identical with Fig. 2.
Liquid crystal layer 400 is to adopt the vertical orientation type liquid crystal that has negative dielectric anisotropy, and in single pixel region, respectively at the 2nd substrate 300 sides and the 1st substrate 100 sides, respectively be provided with in order to pixel region is divided into the orientation control part 500 (orientation cutting part) in most orientation zones.This orientation control part 500 is to form electrodeless 530 in the gap of the 1st electrode 200 in the 1st substrate 100 sides.And, in substrate form all sidedly cover this electrodeless 530 and the 1st electrode 200 with the polyimide alignment films that material was constituted 260 such as (polyimide).
Be to form the jut of giving prominence to towards liquid crystal layer 400 514 on the 2nd electrode 320 of the 2nd substrate 300 sides.And, form the alignment film 260 identical all sidedly to cover this jut 514 and the 2nd electrode 320 with the 1st substrate 100 sides.No matter the alignment film 260 of the 1st substrate, the 2nd substrate-side all is the vertical orientation film, and can adopt no friction mode (rubbing-less type).
In the aforesaid structure, do not apply fully under the state of voltage at the 1st electrode 200 and 320 at the 2nd electrode, the orientation control part 510 of the 2nd substrate 300 sides is to become vertical direction to come orientation long axis of liquid crystal molecule direction (LC directer) 410 facing to the inclined-plane that is the alignment film 260 that forms of the inclined-plane of leg-of-mutton jut 514 by section shape.
After the 1st electrode 200 and 320 at the 2nd electrode began to apply voltage, near the orientation control part 510 of the 2nd substrate 300 sides, the long axis of liquid crystal molecule direction that tilts owing to orientation control can be tilted towards its vergence direction more by the normal direction of base plan in advance.Therefore, orientation control part 510 is the effects by jut 514, will be most zones (domain) that boundary is divided into the LCD alignment orientation in different at least towards each other orientation orientation with this orientation control part 510.
And, being formed at electrodeless 530 of the 1st electrode 200 gaps of the 1st edge of substrate, the line of electric force of (when the electric field that applies is more weak) was shown in the dotted line among the figure when it began to apply voltage.The long axis of liquid crystal molecule direction is to tilt towards line of electric force orthogonal direction therewith, changes speech, and the liquid crystal molecule short-axis direction then tilts towards the direction of line of electric force unanimity therewith.530 initial stage orientation is approximately perpendicular to the 1st substrate 100 though this is electrodeless, because the pass that line of electric force tilts is to be the orientation orientation of may command liquid crystal.With this electrodeless 530 as boundary, the LCD alignment orientation is divided into different towards each other directions.
Fig. 3 A is the planar configuration key diagram about the semi penetration type LCD of this example, shows that the configuration pass of the 1st electrode 200 of being located at the 1st substrate 100 sides and the orientation control part 510 of being located at the 2nd substrate 300 sides is.In addition, Fig. 3 B is the summary section formation of demonstration along the 1st substrate-side of a pixel 600 of the A-A line of Fig. 3 A.
LCD shown in 3A, 3B figure is so-called active-matrix (Active Matrix) type LCD, the most pixels that are rectangular configuration in the viewing area are to be provided with thin film transistor (TFT) (Thin FilmTransistor separately, switch (switch) assembly such as TFT), in this switch module (to call TFT in the following text), form the 1st electrode (pixel electrode) the 200th of pattern individually, be electrically connected in each pixel.And this 1st electrode 200 is to form rectangle (rectangle) pattern with part breach as described later.
Each pixel 600 of this active-matrix type LCD be formed at each pixel other the 1st electrode 200 and therewith the 1st electrode 200 press from both sides common the 2nd electrode (common electrode) 320 of each pixel that liquid crystal layer 400 and subtend be provided with altogether in institute's overlapping areas.Therefore, each pixel 600 is roughly to form the similar rectangle of shape of the 1st electrode therewith.In addition, form in order to prevent light leak between neighbor by the light shield layer (BlackMatrix that light screening material constituted in the 2nd substrate 300 sides, BM) 330, this light shield layer 300 be with as point out among Fig. 3 A broken line (-.-) shown in peristome, the outer rim of each pixel region of standard.In full-color display panel, this pixel region 600 is to show pairing red, green, blue separately or even differently according to situation be a kind of color in the white.Each pixel region 600 is to be provided with that the reflector space 610 that makes the outer light light of side (observe) reflection and show and the light that the panel rear is disposed penetrate and the penetration region 620 that shows.
Above-mentioned TFT is formed at as by on the 1st substrate 100 that glass constituted, the active layers of this TFT (Active Layer) 110 is to use the low temperature polycrystalline silicon that forms island and obtain in annealing laser modes such as (Laser anneal) (low temperature poly silicon, crystallinity silicon layer or amorphous silicon layer (amorphous silicon) such as LTPS).Form to cover this active layers 110 and with the gate insulator that double-decker was constituted 112 as SiO2/SiN, in the top of gate insulator 112 corresponding to the channel of TFT active layers 110 form location form the gate electrode 114 that adopts refractory metal materials such as Cr (and, in the example of Fig. 3 A, the TFT that is located at each pixel adopts the double gated architecture (channel region that two source electrodes with respect to TFT leak the carrier path of level interpolar is connected and the structure of connection) that prevents the high effect of leakage current tool.Form cover gate electrode 114 all sidedly and with the interlayer insulating film that sandwich construction was constituted 116 of SiO2/SiN in substrate, form the contact hole that connects this interlayer insulating film 116 and gate insulator 112 in leak level territory, polar region corresponding to the source electrode of TFT active layers 110, and in the source region of active layers 110 with leak a source electrode 118s and the leakage grade electrode 118d that level territory, polar region is connected with formation such as Al separately.And, leak level electrode 118d and be and be connected to the pixel that is positioned at rectangular configuration data-signal is supplied to the data line (data line) of the pixel of arranging with respect to row (column) direction, in this example, data line is that double as leaks grade purposes of electrode 118d.In addition, above-mentioned gate electrode 114 is to be electrically connected to the pixel that the is positioned at rectangular configuration selection wire in order to the pixel selecting row (row) direction and arrange, and in this example, selection wire is the purposes of double as gate electrode 114.The planarization insulating layer 120 that forms covering source electrode 118s all sidedly, leaks level electrode 118d and constituted in substrate with organic insulation resin or inorganic insulation resin, in the zone of this planarization insulating layer 120, optionally in forming pattern as the good reflexive reflection horizon 130 of tools such as Al corresponding to the reflector space 610 of each pixel.Form this reflection horizon 130 of covering and each pattern of pixels the 1st electrode 200 with formations such as ITO.Form the alignment film 260 that covers the 1st electrode 200 and constituted all sidedly with polyimide as shown in Figure 2 etc. in substrate.And the planarization insulating layer 120 in source electrode 118s institute corresponding region forms contact hole, and above-mentioned the 1st electrode 200 is to be connected to source electrode 118s, and is connected to the source region of TFT active layers by this source electrode 118s.In addition, in the example shown in Fig. 3 B,, only be formed between the 1st electrode 200 and the alignment film 260 and also can though reflector space 610 is created between planarization insulating layer 120 and the 1st electrode 200.
Be formed in each pixel region 600 between the 2nd substrate 300 of the 1st substrate 200 sides with above-mentioned cross-section structure and subtend configuration, it is 3 to 2: 1 that its size can adopt the minor face (as horizontal scan direction) and the ratio on long limit (as vertical scanning direction), particularly, the size a of horizontal scan direction (H direction) is about 46 μ m, the size b of vertical scanning direction (V direction) (=b1+b2) being about 124 μ m, this routine ratio then is 2.7: 1.In addition, the length ratio of reflector space 610 and penetration region 620 longitudinal edges (V direction) is decided according to desired reflecting properties, is about 1: 2 to 3.For example: the V direction length of reflector space 610 is b1, and the V direction length of penetration region 620 is b2, and b1 and b2 are about 37 μ m and 87 μ m, and then the length ratio is 1: 2.35.
In the example as shown in Figure 3A, orientation control part 510 is only to be arranged at penetration region 620.Its reason is that the thickness of liquid crystal layer of reflector space is thinner than penetration region, thereby is difficult to the orientation control part 510 that configuration again has projection.And the reflector space thickness of liquid crystal layer is thin to be can be consistent to difference for the position that two regional liquid crystal are produced, and adjusts optical path length by liquid crystal layer.That is therefore reflector space makes the thickness of liquid crystal layer reduce with the balance optical path length owing to only pass through liquid crystal layer 2 times through incident, reflection.Yet the orientation control part also can be arranged at reflector space 610.
Near the central authorities because of orientation zone, long limit 630 is the elongated shape that is vertical scanning direction, with orientation control part 510,550 segment distance is arranged, and because of V word section up and down divides 550, the 552 orientation orientation of being controlled to differ from one another, near the central authorities orientation is than destabilization, and singular regions takes place near the nonspecific position the central authorities easily.In this example, because the long leg of the 1st electrode 200 more increases orientation control function, singular regions takes place in nonspecific position in the middle section that suppresses orientation zone, long limit 630 vertical scanning directions.That is, in the edge in orientation zone, long limit 630,, be to be provided with additional alignment control part 560 with the substantial middle place of the long side direction that long limit was constituted of the 1st electrode 200.This additional alignment control part 560 is different with the orientation control part 510 of above-mentioned the 2nd electrode side, can not cut apart the orientation of this regional pixel 600 fully.But near the non-persistent part in LCD alignment orientation for 630 central authorities of orientation zone, long limit then can make its orientation orientation stable.Though cut apart the preferential orientation orientation of liquid crystal about general clearly not as the straight line portion 540 of orientation control part 510, only in the following manner, in dividing 550,552 roughly the same directions with V word section, the electrode edge of performance orientation control function is set, also prevent the disorder of orientation.
As shown in Figure 3A, additional alignment control part 560 can be the formation of the vee that is formed at the 1st electrode 200.This triangle can be isosceles right triangle, and its height that is notch depth are 3 μ m.As mentioned above,, the V word section of orientation control part 510 is made as 90 when spending when dividing 550,552 angle Θ,
Because this breach is an isosceles right triangle, wherein one of both arms of V word can be roughly parallel on one side, and the LCD alignment in folded zone therebetween can be gathered, can effectively suppress the generation of tangible wire singular regions and suppress this line to take place in nonspecific position.Certainly, it is 550,552 parallel fully that the incision limit of breach can't be divided with the V word section of above-mentioned orientation control part 510, and the effect of approaching more parallel then performance is high more.And, even the effect step-down is provided with the breach that has nothing to do with shape and also can prevents that the wire singular regions from taking place in nonspecific position.So, one of long limit of the 1st electrode 200 forms breach, is identical with electrodeless 530 principle, and this part can produce the initial stage orientation of tilting slightly and suppress the wire singular regions and take place in nonspecific position.Wherein, breach amount (degree of depth of incision) is if though 5 μ m also produce effect, and in this case, electrode area can reduce and reduce aperture opening ratio (penetrance), though so notch depth be contemplated to be 3 μ m of little tool effect.And as shown in Figure 3A, in fact the limit because of the 1st electrode 200 is to be coated with light shield layer 330, and the influence to aperture opening ratio during notch depth 3 μ m becomes small.And, when this 1st electrode 200 is provided as the additional alignment control part 560 of breach, is not after the 1st electrode 200 patternings, to form, but when the 1st electrode 200 patternings, forms simultaneously with the step of appending.
And the additional alignment control part also can adopt the breach that replaces the 1st electrode and form the formation of projection on the 2nd electrode 320.Projection is the mode identical with the jut 514 of the orientation control part 510 of cutting apart pixel to form.In addition, on the contrary, though the step that need append also can divide in the long leg of the 1st electrode 200 to form projection.
Fig. 4 is other shape of display pixel (the 1st electrode 200).In Fig. 4, the pixel 602 i.e. shape of the 1st electrode 200 is compared with the 1st electrode 200 shown in Fig. 3 A, has less length breadth ratio 2 to 1.5: 1, comparatively tubbiness, that is approaching foursquare rectangle.In semi penetration type LCD is example, is provided with reflector space 612 and the penetration region 622 identical with the LCD of 3A, 3B figure in each pixel.Rectangular minor face (H direction length) a is about 65.5 μ m, long limit (V direction length) b (=(=31+86) μ m, this routine length breadth ratio is 1.79: 1 b1+b2) to be about 117.The orientation control part 512 of cutting apart the orientation zone of pixel 602 is to comprise straight line portion 570 to divide 580,582 with V word section, and the angle theta of V word is greater than 90 degree, for example 120 degree.Additional alignment control part 560 is to be arranged near the central authorities on penetration region 622 long limits, and it is shaped as the isosceles triangle that drift angle is about 60 degree.This leg-of-mutton limit is to be roughly parallel to the both arms 580,582 that V word section divides.
About Fig. 3 A and pixel 600,602 shown in Figure 4, though be used for partition, be arranged at penetration region 620,622 to the orientation control part the 510, the 512nd in zone, also can be arranged at reflector space 610,612.And, no matter the viewing area of the 1st electrode 200 sides all has the reflection type LCD of reflection function or the penetrating type LCD that all has the function of penetrating, the 1st electrode 200 all can adopt above-mentioned Fig. 3 A, 3B and shape shown in Figure 4, mat disposes this orientation control part 510 that only is formed at penetration region in constituting, and the Zone Full of the 1st electrode 200 is divided into most orientations zone.For example, can prolong the line part 540 of Fig. 3 A etc.And, stabilize for making along the orientation in the orientation zone, long limit that this line part 540 forms, near the central authorities on the long limit of the 1st electrode 200, additional alignment control part 560 is set in the above described manner, also can obtain same effect.And, in the situation of reflection type LCD, can for example form the 1st electrode 200, or the reflection horizon is set by the lower floor of the 1st electrode 200 that transparent conductive material constituted shown in Figure 2 with reflectivity conductive materials such as Al.
Other shape of Fig. 5 and 6 display pixels.In the pixel 604 of Fig. 5 (the 1st electrode 200), except that the shape of additional alignment control part, be to equate with the pixel 600 (the 1st electrode 200) of Fig. 3 A.In the example of Fig. 5, additional alignment control part 570 is trapezoidal, and its height is identical with vee, can be 3 μ m or 5 μ m.In addition, length (length of going to the bottom) is as 37 μ m.Divide identical angle for trapezoidal hypotenuse is had with the V word section of orientation control part 510, the length of upper base is to be set at than the weak point of going to the bottom.
In Fig. 6, the shape of part is to equate with the pixel 602 (the 1st electrode 200) of Fig. 4 beyond the shape of the middle additional alignment control part of pixel 606 (the 1st electrode 200).Difference is that additional alignment control part 572 is trapezoidal, and this trapezoidal height is identical with leg-of-mutton breach situation, can be 3 μ m or 5 μ m.In addition, length (length of going to the bottom) is 27 μ m.In addition, in the situation of Fig. 6, trapezoidal hypotenuse is preferably the bearing of trend of the V word both arms that are parallel to relative orientation control part.The trapezoidal of this shape arranged, also can prevent the generation of singular regions.Trapezoidal situation, its advantage are that trapezoidal upper base slightly is parallel to the straight line portion of orientation control part, and the orientation of liquid crystal therebetween is easier to set.But then, because electrode area reduces in a large number, aperture opening ratio is a variation.Must consider desired aperture opening ratio and the actual degree that generates singular regions, whether use triangle with decision, or trapezoidal, or the setting of its height equidimension.
In sum, in above-mentioned each example, be to increase the orientation control part of cutting apart pixel region, the additional alignment control part is disposed at the about centre of the longest part at edge adjacent in the institute cut zone edge with the limit in former pixel zone.This part is because apart from the formed orientation control part of each pixel boundary (electrodeless portion) and cut apart orientation control part (projection) that single pixel region becomes most orientations zone farthest, be difficult for by these orientation control part set orientation orientation, therefore than destabilization.Each example all is in this part the orientation control part to be set, and promotes image quality in the hope of orientation is stabilized.In addition, except that promoting image quality, the existence of this additional alignment control part, but because of near the orientation orientation of the standard central authorities in orientation zone, long limit, also can promote this relevant liquid crystal responsiveness in orientation zone, length limit.
In addition, though only show in above-mentioned each example that the additional alignment control part is arranged at long edge regions 630, also can be arranged at down edge regions 640 and upper edge region 650 in case of necessity.
Claims (20)
1. liquid crystal indicator, it is with the 1st substrate with the 1st electrode and the 2nd substrate with the 2nd electrode electrode forming surface folder liquid crystal layer separately therebetween and the liquid crystal indicator of subtend configuration is characterized in that:
Each pixel region is a polygon, and has the orientation control part in order to the orientation orientation of control liquid crystal, is divided into most orientation zones by this orientation control part;
In this majority orientation zone, this end of this pixel region in the orientation zone consistent with the end of each pixel region, its end is provided with the additional alignment control part.
2. liquid crystal indicator according to claim 1, this additional alignment control part wherein one of them is formed at the substantial middle position of this end of this pixel region that constitutes this orientation zone at least.
3. liquid crystal indicator according to claim 1, wherein:
This each pixel region is a rectangle;
This orientation control part has straight line portion that the long side direction with respect to this pixel region extends in parallel, and the V word section branch that extends toward the corner direction or the side directions of this pixel region of straight line portion two ends thus;
This additional alignment control part is arranged at the long limit end of this pixel region.
4. liquid crystal indicator according to claim 1, wherein:
The 1st electrode is corresponding to this each pixel region rectangular shape, and has other pattern in each pixel region;
This orientation control part has the orientation projection that is arranged at the 2nd electrode side.
5. liquid crystal indicator according to claim 1, wherein:
The 1st electrode is corresponding to this each pixel region rectangular shape, and has other pattern in each pixel region;
This additional alignment control part is to form breach pattern mode with the edge in the 1st electrode to constitute.
6. liquid crystal indicator according to claim 5, wherein: the breach pattern of this additional alignment control part is a triangle.
7. liquid crystal indicator according to claim 5, wherein: the breach pattern of this additional alignment control part is trapezoidal.
8. liquid crystal indicator according to claim 1, wherein: this additional alignment control part is formed in the edge of cut zone adjacent to the longest edge in the edge on each pixel region border.
9. liquid crystal indicator according to claim 1, wherein: this additional alignment control part has the interior side-prominent leg-of-mutton shape by past this pixel region of long limit end of this pixel region.
10. liquid crystal indicator according to claim 9, wherein: this hypotenuse is parallel to a bearing of trend of this orientation control part.
11. liquid crystal indicator according to claim 1, wherein: this additional alignment control part has the interior side-prominent trapezoidal shape by past this pixel region of long limit end of this pixel region.
12. liquid crystal indicator according to claim 11 is characterized in that: this trapezoidal hypotenuse is parallel to the bearing of trend of the part of this orientation control part.
13. liquid crystal indicator, be therebetween and subtend configuration and in the liquid crystal indicator that display part has the pixel of rectangular configuration is characterized in that with the 1st substrate with the 1st electrode and the electrode forming surface folder liquid crystal layer separately of the 2nd substrate with the 2nd electrode:
Be provided with the orientation control part in each pixel, in order to cut apart most orientations zone different in each pixel region with the preferred orientation direction;
The indivedual polygon patterns that form with respect to each aforementioned pixel of the 1st electrode, and the edge of the 1st electrode has the function as the some of this orientation control part;
Near the edge that is less than long side direction,, be formed with additional alignment control part in the 1st electrode in order near the orientation stable its central authorities with respect to the specific orientation zone that this orientation control part is cut apart.
14. liquid crystal indicator according to claim 13, wherein: this additional alignment control part has the interior side-prominent leg-of-mutton shape by past this pixel region in edge of the long side direction of the 1st electrode.
15. liquid crystal indicator according to claim 14, wherein: this additional alignment control part is the breach pattern formation with the 1st electrode.
16. liquid crystal indicator according to claim 14, wherein: this hypotenuse is parallel to the bearing of trend of the part of this orientation control part.
17. liquid crystal indicator according to claim 13, wherein: this additional alignment control part has the interior side-prominent trapezoidal shape by past this pixel region in edge of the long side direction of the 1st electrode.
18. liquid crystal indicator according to claim 17, wherein: this additional alignment control part is the breach pattern formation with the 1st electrode.
19. liquid crystal indicator according to claim 11, wherein: this trapezoidal hypotenuse is parallel to the bearing of trend of the part of this orientation control part.
20. liquid crystal indicator according to claim 13, wherein: the 1st electrode is electrically connected to the switch module of being located at each pixel.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004345222 | 2004-11-30 | ||
| JP2004345222 | 2004-11-30 | ||
| JP2005337876 | 2005-11-22 |
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| Publication Number | Publication Date |
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| CN1782823A true CN1782823A (en) | 2006-06-07 |
| CN100541296C CN100541296C (en) | 2009-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005101243798A Active CN100541296C (en) | 2004-11-30 | 2005-11-29 | Liquid crystal indicator |
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| CN (1) | CN100541296C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102402042A (en) * | 2011-11-02 | 2012-04-04 | 深圳市华星光电技术有限公司 | LCD (Liquid crystal display) device and preparing method thereof |
| US8576364B2 (en) | 2007-12-21 | 2013-11-05 | Au Optronics Corp. | Method for forming multiple alignment films on a substrate and pixel structure of a liquid crystal display |
| CN105116643A (en) * | 2015-09-28 | 2015-12-02 | 京东方科技集团股份有限公司 | Liquid crystal lens, three-dimensional display device and manufacturing method of liquid crystal lens |
| CN106154683A (en) * | 2016-08-31 | 2016-11-23 | 京东方科技集团股份有限公司 | A kind of liquid crystal prism and preparation method thereof, display device |
| CN109596062A (en) * | 2017-10-02 | 2019-04-09 | 源奇科技股份有限公司 | Optical sensing apparatus and structured light projector |
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2005
- 2005-11-29 CN CNB2005101243798A patent/CN100541296C/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8576364B2 (en) | 2007-12-21 | 2013-11-05 | Au Optronics Corp. | Method for forming multiple alignment films on a substrate and pixel structure of a liquid crystal display |
| CN102402042A (en) * | 2011-11-02 | 2012-04-04 | 深圳市华星光电技术有限公司 | LCD (Liquid crystal display) device and preparing method thereof |
| CN105116643A (en) * | 2015-09-28 | 2015-12-02 | 京东方科技集团股份有限公司 | Liquid crystal lens, three-dimensional display device and manufacturing method of liquid crystal lens |
| CN106154683A (en) * | 2016-08-31 | 2016-11-23 | 京东方科技集团股份有限公司 | A kind of liquid crystal prism and preparation method thereof, display device |
| CN109596062A (en) * | 2017-10-02 | 2019-04-09 | 源奇科技股份有限公司 | Optical sensing apparatus and structured light projector |
| US10731976B2 (en) | 2017-10-02 | 2020-08-04 | Liqxtal Technology Inc. | Optical sensing device and structured light projector |
| CN109596062B (en) * | 2017-10-02 | 2020-12-01 | 源奇科技股份有限公司 | Optical sensing device and structured light projector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100541296C (en) | 2009-09-16 |
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