CN103278958A - Liquid crystal grating and display system with same - Google Patents
Liquid crystal grating and display system with same Download PDFInfo
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- CN103278958A CN103278958A CN2013102140149A CN201310214014A CN103278958A CN 103278958 A CN103278958 A CN 103278958A CN 2013102140149 A CN2013102140149 A CN 2013102140149A CN 201310214014 A CN201310214014 A CN 201310214014A CN 103278958 A CN103278958 A CN 103278958A
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Abstract
A liquid crystal grating is sequentially provided with a polarizing film, a compensation film, a glass layer, a pixel matrix layer, a liquid crystal layer, an upper electrode, another glass layer and another compensation film from one side to the other side of the liquid crystal grating. The pixel matrix layer comprises a plurality of rows of pixels comprising pixel units, each pixel unit comprises eight adjacent pixels, the pixels are symmetrically arranged to form broken lines, lengths of the pixels of each section positioned on a side of each broken line are identical, each row of pixels is provided with four scanning circuits, each first scanning circuit is used for driving the second pixel and the fourth pixel in the corresponding pixel unit, each second scanning circuit is used for driving the first pixel and the third pixel in the corresponding pixel unit, each third scanning circuit is used for driving the sixth pixel and the eighth pixel in the corresponding pixel unit, and each fourth scanning circuit is used for driving the fifth pixel and the seventh pixel in the corresponding pixel unit. The liquid crystal grating has the advantages that moire strips can be effectively eliminated, image interference due to the moire strips is reduced, the resolution of a display system can be improved, 3D (three-dimensional) and double-vision-screen display can be implemented, and a driving mode is simple.
Description
Technical field
The invention belongs to field of liquid crystal display, relate in particular to a kind of liquid crystal grating and have the display system of this liquid crystal grating.
Background technology
In the bore hole 3D technology of current trend, mainly comprise slit grating formula bore hole 3D technology and lens pillar formula bore hole 3D technology, but the shortcoming that both all exist display resolution to reduce by half when 3D shows.No matter be that slit grating formula bore hole 3D technology or lens pillar formula bore hole 3D technology are used in the large screen display simultaneously, general or volume is thicker, or the best image zone from display too close to shortcomings such as (less than 1m).Because in double vision difference display system, no matter be slit grating formula bore hole technology or lens pillar bore hole technology, its parameter is approximate to satisfy condition: D=WpL/E, wherein Wp is sub pixel width, L is viewing ratio, E is about 6.5cm for people's two eye pupil pitchs of holes, D is the distance between display and slit grating or the lens pillar, 50 cun screens with FHD are example, the sub-pixel level width of 50 cun screens of FHD is 0.18mm, wherein the viewing distance of 50 cun the bests for the display 3m of being separated by, so D is required to be 0.83mm, therefore for guaranteeing that the comfortable 3D that watches needs slit grating or lens pillar and the display 0.83mm of being separated by, the thickness of display be must increase greatly, slit grating or lens pillar and display also increased to the difficulty of bit alignment simultaneously.If it is too near that slit grating or lens pillar and display are separated by, must cause being separated by with display and very closely just can watch the 3D program, easily cause the fatigue of human eye.
Raster pattern bore hole 3D technology and lens pillar formula bore hole 3D technology are disturbed the Moire fringe that forms for fear of the black matrix" in grating or lens and the display screen in addition, generally can make in two ways, one is to use stepped slit grating or lens pillar, the 2nd, make in grating and the display screen the line of pixels column direction at an angle, but mode two can be introduced crosstalking between the right and left eyes images; Though crosstalking between the mode one energy elimination of level direction right and left eyes image, but can increase crosstalking between the vertical direction right and left eyes image, thereby influence viewing effect, slit grating or lens pillar are stepped in the simultaneous system one arranges, therefore show between the different rows in the display screen that the row of corresponding anaglyph have nothing in common with each other, and cause the complexity of its display driver mode to increase.Do not support the bore hole double vision to show frequently in the simultaneously present bore hole 3D display system, show frequently if display system can support bore hole 3D to show with the bore hole double vision simultaneously, can improve the range of application of this display system greatly, satisfy people's diversified demand.
Summary of the invention
The present invention is intended to solve that existing bore hole 3D resolution of display system is low in the prior art, display thickness is big, drive technical matters complicated, that the image existence is crosstalked, a kind of liquid crystal grating is provided, can effectively improve display system resolution, reduce the thickness of display, effectively reduce image disruption, can support the bore hole double vision to show frequently simultaneously.
Present embodiment provides a kind of liquid crystal grating, this liquid crystal grating is disposed with polaroid, compensate film, glassy layer, picture element matrix layer, liquid crystal layer, top electrode, glassy layer and compensate film from a side to opposite side, described picture element matrix layer comprises the multirow pixel of being made up of pixel cell, each pixel cell is made up of eight adjacent pixels, each pixel is symmetrical broken line and arranges, and the length that is positioned at every section pixel on the limit of broken line is identical
Wherein, every capable pixel is provided with four trace wirings, trace wiring one is used for driving second pixel and the 4th pixel of each pixel cell, trace wiring two is used for driving first pixel and the 3rd pixel of each pixel cell, trace wiring three is used for driving the 6th pixel and the 8th pixel of each pixel cell, trace wiring four-function the 5th pixel and the 7th pixel in driving each pixel cell.
Preferably, described compensate film is that the macromolecular material with negativity birefraction is formed dish-shaped liquid crystal, and is described. the ITO film of very whole the property that power on.
Preferably, the pixel in the described picture element matrix layer has 20 row, and the length of every section pixel on the described limit that is positioned at broken line is 50um, and width is 30um.
The present invention also provides a kind of display system, comprise LCDs, lenticular sheet matrix and above-mentioned liquid crystal grating, described LCDs and liquid crystal grating carry out simultaneous scanning of lines and switch, described lenticular sheet matrix is positioned on the liquid crystal grating, LCD is positioned on the lenticular sheet matrix, backlight is positioned under the liquid crystal grating, and simultaneously, the liquid crystal layer of described liquid crystal grating is positioned on the focal plane of lens pillar;
Wherein, branch light action by liquid crystal grating and lens pillar, in a certain frame time, only make left eye see the left-eye image that LCD shows, only make right eye see the eye image that LCD shows in time at next frame, display system produces bore hole 3D and shows that described frame switching frequency is greater than 120HZ;
Branch light action by liquid crystal grating and lens pillar, in a certain frame time, only make first image of seeing that in a zone display shows, only make second image of seeing that in another zone display shows in time at next frame, display system produces the bore hole double vision and shows frequently.
Preferably, the parameter that relates in the described display system need satisfy formula:
L6=8*E*L8/(E+L8)，
L7=L8*E/L5，
Wherein, L6 is the pitch of lens pillar, and L8 is the width of liquid crystal grating pixel, L7 be lens pillar to the distance of liquid crystal grating, L5 be best image zone to the distance of lens pillar, E is people's eye pupil pitch of holes.
Preferably, be angle θ and 180-θ respectively on the described liquid crystal grating between every section pixel on two adjacent on described broken line limits and described lenticular sheet, described angle θ is greater than 0.57 °.
Preferably, the combination of described liquid crystal grating and lens pillar and described LCDs are a tilt angle theta 1 respectively, and described θ 1 is greater than 0.2 °.
Preferably, display system is under bore hole 3D pattern or the bore hole double vision frequency pattern, in the described liquid crystal grating, the time interval that the pixel drive signal of same trace wiring differs in a certain trace wiring and the i+1 pixel column in the i pixel column is t/20, and wherein said t is the sweep time of a two field picture.
Preferably, when display system produces bore hole 3D demonstration, in the described liquid crystal grating, identical with the driving signal of trace wiring three with the trace wiring one in delegation's pixel, trace wiring two is identical with the pixel drive signal of trace wiring four, and differs on the pixel drive signal sequential of trace wiring one and trace wiring two time of scanning one two field picture.
Preferably, when display system generation bore hole double vision shows frequently, in the described liquid crystal grating, identical with the driving signal of trace wiring two with the trace wiring one in delegation's pixel, trace wiring three is identical with the pixel drive signal of trace wiring four, and differs on the pixel drive signal sequential of trace wiring one and trace wiring three time of scanning one two field picture.
In the above technical scheme, by in liquid crystal grating, each pixel is symmetrical broken line arranges, and the length that is positioned at every section pixel on the limit of broken line is identical, and every capable pixel is provided with four trace wirings, can effectively fall the elimination Moire fringe, reduce the image disruption that therefore causes simultaneously.Simultaneously it is applied in the display system, in the distance that can significantly reduce on the big screen LCD between lens pillar and the liquid crystal grating, simultaneously all can illuminate the display screen that is located thereon fully because of the light from all angles of lens pillar ejaculation, not only effectively improved display system resolution, reduced the thickness of display, and realized that bore hole 3D pattern shows and bore hole double vision screen pattern shows that drive pattern is simple.
Description of drawings
Fig. 1 is liquid crystal grating structural representation in the display system of an embodiment of the present invention;
Fig. 2 is the display system architectures synoptic diagram of an embodiment of the present invention;
Fig. 3 is dot structure synoptic diagram in the liquid crystal grating of an embodiment of the present invention;
Fig. 4 is pixel arrangement synoptic diagram in the liquid crystal grating of an embodiment of the present invention;
Fig. 5 is the eye image displaying principle synoptic diagram under the display system 3D display mode of an embodiment of the present invention;
Fig. 6 is the left-eye image displaying principle synoptic diagram under the display system 3D display mode of an embodiment of the present invention;
Fig. 7 is the display system double vision zone two image displaying principle synoptic diagram under the display mode frequently of an embodiment of the present invention;
Fig. 8 is the display system double vision zone one image displaying principle synoptic diagram under the display mode frequently of an embodiment of the present invention;
Fig. 9 is the same scan circuit pixel drive signal sequential chart in the different pixels row in the liquid crystal grating of an embodiment of the present invention;
Figure 10 is each trace wiring pixel drive signal sequential chart of liquid crystal grating same pixel row under the 3D display mode in the display system of an embodiment of the present invention;
Figure 11 is double vision each trace wiring pixel drive signal sequential chart of liquid crystal grating same pixel row under the display mode frequently in the display system of an embodiment of the present invention.
Embodiment
In order to make technical matters solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
In conjunction with shown in Figure 1, embodiments of the invention provide a kind of liquid crystal grating 300, and this liquid crystal grating 300 is disposed with polaroid 306, compensate film 302, glassy layer 303, picture element matrix layer 301, liquid crystal layer 305, top electrode 304, glassy layer 303 and compensate film 302 from a side to opposite side.Described compensate film 302 is formed for the macromolecular material that dish-shaped liquid crystal etc. has the negativity birefraction, the birefringence that compensate film 302 is used for counteracting liquid crystal grating 300 liquid crystal molecules enlarges the visual angle, top electrode 304 is the ITO film of whole property, picture element matrix layer 301 is controlled the switch that its region light is controlled in the rotation of liquid crystal molecule on it by driving, liquid crystal layer 305 is subjected to electric field effects between picture element matrix layer 301 and the top electrode 304 and turns to, in order to reduce pixel, it is the fringing field effect between the pixel electrode, increase the response speed of liquid crystal grating simultaneously, the distance between the need minimizing pixel electrode and the thickness of liquid crystal layer 305; Polaroid 306, the polarization direction of the polaroid of its polarization direction and LCD 100 bottoms is parallel to each other, therefore when having electric field between picture element matrix layer 301 and the top electrode 304, light can pass through LCDs 100, when between picture element matrix layer 301 and the top electrode 304 not during added electric field, thereby light will be absorbed the effect that reach grating by the polaroid of LCDs 100 bottoms.The principle of work of liquid crystal grating below only is described with normal black pattern, in practice, also can adopts normal white mode.
Further, described picture element matrix layer 300 comprises the multirow pixel of being made up of pixel cell, and each pixel cell is made up of eight adjacent pixels, and each pixel is symmetrical broken line arranges, and it is identical to be positioned at the length L 1 of every section pixel on the limit of broken line,
As shown in Figure 4, every capable pixel is provided with four trace wirings, trace wiring 1 is used for driving second pixel and the 4th pixel of each pixel cell, trace wiring 2 20 is used for driving first pixel and the 3rd pixel of each pixel cell, trace wiring 3 30 is used for driving the 6th pixel and the 8th pixel of each pixel cell, trace wiring 4 40 is used for driving the 5th pixel and the 7th pixel of each pixel cell, will elaborate the concrete principle of work of liquid crystal grating in the introduction below.
In conjunction with Fig. 2, Fig. 3, and shown in Figure 4, the present invention also provides a kind of display system, comprise LCDs 100, lenticular sheet matrix 200 and liquid crystal grating 300, described LCDs 100 scans switching synchronously with liquid crystal grating 300, described lenticular sheet matrix 200 is positioned on the liquid crystal grating 300, LCDs 100 is positioned on the lenticular sheet matrix 200, backlight is positioned under the liquid crystal grating 300, simultaneously, the liquid crystal layer 305 of described liquid crystal grating 300 is positioned on the focal plane of lens pillar;
Wherein, in the display system that present embodiment provides, branch light action by lens pillar in liquid crystal grating 300 and the lenticular sheet matrix 200, in a certain frame time, only make left eye see the left-eye image that LCD shows, only make right eye see the eye image that LCD shows in time at next frame, display system produces bore hole 3D and shows that described frame switching frequency is greater than 120HZ; By the branch light action of liquid crystal grating 300 with lens pillar, in a certain frame time, only make the image 1 of seeing that in a zone display shows, only make the image 2 of seeing that in another zone display shows in time at next frame, display system produces the bore hole double vision and shows frequently.
As shown in Figure 2, for advantage of the present invention better is described, here suppose that L5 is that the best image zone is to the distance of lens pillar, L6 is the pitch of lens pillar, L7 be lens pillar to the distance of liquid crystal grating 300, L8 is the width of liquid crystal grating pixel electrode (pixel), E is people's eye pupil pitch of holes, because lens pillar among the present invention is responsible for 8 pixel light splitting of liquid crystal grating, so each parameter need satisfy:
L6=8*E*L8/(E+L8)，L7=L8*E/L5；
In order to reduce lens pillar to the distance L 7 of liquid crystal grating 300, need to reduce the size of L8, if we are set at L8 30um(and arrange very few, fringing field effect around the pixel electrode of liquid crystal grating can not ignore, thereby cause 3D left and right sides picture crosstalk), best image distance L 5 is 3m, the human eye interocular distance is about 65mm, L8 is 30um, therefore the pitch L6 of lens pillar is 0.2399mm, lens pillar is to the distance L 7=1.15mm of liquid crystal grating 300, because the liquid crystal layer 305 of liquid crystal grating 300 is positioned on the focal plane of lens pillar, so the focal distance f=L7 of lens pillar.By above-mentioned, we can significantly reduce the distance between lens pillar and the liquid crystal grating 300 as can be known in the application of large screen display.Therefore lens pillar and the LCD 100 that is located thereon and unrestricted can be close to lens pillar the low thickness that reduces whole display system of bringing in that is combined in LCDs 100 simultaneously.Simultaneously the light because of all angles that penetrate from lens pillar all can illuminate the LCDs 100 that is located thereon fully, therefore can reach the full resolution demonstration.
Because adopt the stepped cylindrical grating, therefore show the also stepped distribution of pixel of left-eye image in the pixel under the grating, but lens pillar has only the branch light action of horizontal direction, in the vertical direction, the direction of light does not change, therefore when the people watches that the angle of display is not level, will cause disturbing, should only see left-eye image, but because the people watches that the angle of display vertical direction has caused seeing the image of right eye, thereby cause interference.In order to eliminate above interference, eliminate Moire fringe simultaneously, the present invention adopts the liquid crystal grating pixel electrode pattern of Fig. 3 institute formula, comprises lenticular sheet matrix 200; Liquid crystal grating pixel 301, i.e. pixel electrode; Angle between liquid crystal grating pixel electrode shown in the figure and the lens pillar is assumed to be θ, interference range 3011 in the liquid crystal grating, non-interference range 3012 in the liquid crystal grating, the lateral separation L2 of liquid crystal grating interference range is positioned at the length L 1 on the broken line limit in the liquid crystal grating pixel electrode.Be to eliminate Moire fringe, have angle theta between the pixel electrode need of liquid crystal grating and the lenticular sheet.We suppose that the broadband of the pixel electrode of liquid crystal grating is A, and the pitch of lens pillar is B, and human eye can be discovered the minimum wide P that is of the Moire fringe that, and according to the Moire fringe principle, θ need satisfy formula (1)-(3):
Wherein n is all positive integers.P is about 3mm, A=30um, and B=0.2399mm, calculating θ by above three formula needs greater than 0.57 °.Therefore as long as angle θ is greater than 0.57 ° between the pixel electrode of liquid crystal grating 300 and the lens pillar, human eye just can be discovered less than Moire fringe.θ is made as 2 ° in an embodiment of the present invention, because the electrode of liquid crystal grating is symmetrical broken line distribution, can regard as by two parts and form, be angle theta between a part and the lenticular sheet, another part then and be between the lenticular sheet angle (180 °-θ), these two parts alternately are connected and have constituted the pixel electrode of liquid crystal grating.Such liquid crystal pixel electrodes can have two zones, it is respectively interference range 3011 and non-interference range 3012, because of the person's of existence angle between the electrode in its zone 3011 and the lens pillar, so can cause crosstalking of image, because being parallel to each other between the electrode in its zone 3012 and the lens pillar, therefore there is not interference, so in order to reduce the interference of image, need to reduce the lateral separation L2 of liquid crystal grating interference range.Length and the satisfied following formula of θ because of L2 and L1:
L1*Sinθ=L2 （4）
Therefore only need the length L 7 of the suitable liquid crystal grating pixel electrode middle polyline of design, just interference region can be reduced to does not influence human eye and watches.Among the present invention, preferably, described L1 is designed to 50um, therefore L2 approximates 1.7um, so the area S4 of interference range 3011 with the ratio of the area S5 of non-interference range 3012 is: S4/S5=1.7/30=0.057, therefore interference region only accounts for 5.7% of the non-interference range of liquid crystal grating pixel electrode altogether, has significantly reduced the interference effect of bringing because of Moire fringe.Simultaneously form Moire fringe between the black matrix" in liquid crystal grating 300 and lenticular sheet matrix 200 and the LCDs 100, only need liquid crystal grating 300, lenticular sheet matrix 200 are got final product with LCDs 100 inclination certain angles, here suppose the wide 0.1mm of sub-pixel of display screen, for people's formula (1)-formula (3), can be regarded as out liquid crystal grating, lens pillar and display screen tilt angle theta 1 needs to get final product greater than 0.2 °, in the embodiments of the invention liquid crystal grating, lens pillar and display screen is tilted 3 °.
Therefore in the display system of the present invention, the pixel in the described picture element matrix layer 301 has 20 row, and the length of every section pixel on the described limit that is positioned at broken line is 50um, and width is 30um; Between every section pixel on two adjacent on described broken line limits and described lenticular sheet, be angle θ and 180-θ respectively on the described liquid crystal grating 300, described angle θ is greater than 0.57 °, simultaneously described liquid crystal grating 300 is a tilt angle theta 1 respectively with combination and the described LCDs 100 of lens pillar 200, and described θ 1 is greater than 0.2 °.By the setting of above technical scheme, can effectively eliminate the image disruption that Moire fringe brings.
Further, display system provided by the invention can realize that bore hole 3D shows and the bore hole double vision shows frequently, and concrete principle of work can realize by the trace wiring in the pixel electrode matrix in the control liquid crystal grating.So in conjunction with Fig. 4, Fig. 9, Figure 10 and Figure 11, the pixel cell that liquid crystal grating 300 each the row pixel among the present invention are made up of 8 adjacent pixels is formed, from left to right we are labeled as 1-8 to these 8 pixels successively, trace wiring 2 20 control pixels 1 and 3; Trace wiring one 10 control pixels 2 and 4; Trace wiring 4 40 control pixels 5 and 7; Trace wiring 3 30 control pixels 6 and 8.In the pixel electrode of different rows, all have four trace wirings among the figure, because LCDs 100 is carried out the mode of image scanning generally based on line scanning, therefore in a LCDs 100, have and have former frame image and back one two field picture simultaneously, if only take the liquid crystal grating pixel electrode of delegation, will cause crosstalking of image.And in the present embodiment pixel electrode of liquid crystal grating is divided into 20 row, and itself and LCDs 100 carried out line scanning synchronously, therefore differing the sweep time between each row liquid crystal grating pixel electrode and the adjacent lines is 1/20 of the 1 two field picture demonstration time, just can reduce this crosstalking.
When realizing that bore hole 3D shows, trace wiring 1 in the same pixel column is identical with the pixel drive signal of trace wiring 3 30, trace wiring 2 20 is identical with the pixel drive signal of trace wiring 4 40, differ the time of a two field picture on the pixel drive signal sequential of trace wiring 1 and trace wiring 2 20, therefore can realize in the liquid crystal grating 300 with pixel alternation switch adjacent one another are in delegation's pixel; When realizing that the bore hole double vision shows frequently, trace wiring 1 in the same pixel column and trace wiring 2 20 to drive the moving signal of pixel identical, trace wiring 3 30 is identical with the pixel drive signal of trace wiring 4 40, differ the time of a two field picture on the driving signal sequence of trace wiring 1 and trace wiring 3 30, therefore can realize in the every capable pixel of liquid crystal grating every four pixel alternation switches.In order to realize above-mentioned functions, be provided with the SiNx layer of one deck insulation between each trace wiring and the pixel electrode in this example, both connect by contact hole 6, thereby guarantee that each trace wiring only drives its corresponding pixel electrode.Further, also being provided with black matrix" 7 between every capable pixel, is the crosstalk phenomenon that exists between the capable and row of each pixel electrode in order to eliminate.
Figure 11 shows in the display system that the embodiment of the invention provides at 3D display mode and the double vision sequential chart of pixel drive signal in the same scan circuit of liquid crystal grating different pixels row under the display mode frequently, here use trace wiring 1 as an example, trace wiring 2 20, trace wiring 3 30 and trace wiring 4 40 are all similar with it.Pixel drive signal shown in the figure comprises: the sequential chart of the pixel drive signal 600 of trace wiring one in every capable pixel; To drive the time interval that signal differs be t1 for i line scanning circuit and i+1 line scanning circuit as can be seen, the time of 600 one semiperiods of scanning of pixel drive signal is t, therefore t just is the sweep time of a two field picture, and i line scanning circuit is t/20 with the time interval t1 that i+1 line scanning circuit driving signal differs.
Figure 12 and Figure 13 show go together the mutually sequential chart of each trace wiring driving circuit of liquid crystal grating under the display mode frequently of 3D display mode and double vision in the display system that the embodiment of the invention provides respectively.Wherein when realizing that bore hole 3D shows, pixel drive signal 601 with the trace wiring 1 in the delegation is identical with the pixel drive signal 603 of trace wiring 3 30, the pixel drive signal 602 of trace wiring 2 20 is identical with the pixel drive signal 604 of trace wiring 4 40, differs the time of a two field picture on the driving signal sequence of trace wiring 1 and trace wiring 2 20; When realizing that the bore hole double vision shows frequently, pixel drive signal 601 ' with the trace wiring 1 in the delegation is identical with the pixel drive signal 602 ' of trace wiring 2 20, the pixel drive signal 603 ' of trace wiring 3 30 is identical with the pixel drive signal 604 ' of trace wiring 4 40, differs the time of a two field picture on the driving signal sequence of trace wiring 1 and trace wiring 3 30.
The description of the display systems technology scheme by above-described embodiment can realize 3D display mode and double vision display mode frequently, in conjunction with Fig. 5 and shown in Figure 6, the pixel that pixel one 3013 expressions of liquid crystal grating are intervally arranged among the figure, pixel 2 3014 is between the space of pixel 1, also be intervally arranged, be the 1st in the pixel cell such as pixel 1,3,5,7 pixels, pixel 2 3014 is the 2nd in this pixel cell just so, 4,6,8 pixels, can realize pixel 1 and pixel 2 3014 mutual alternation switches by above-mentioned pixel drive signal, therefore when pixel 1 when opening, pixel 2 3014 is for closing, when pixel 1 was the pass, pixel 2 3014 was for opening.When pixel 2 3014 for opening, when pixel 1 is closed, this moment, LCDs 100 showed is right eye 401 picture signals in the video, what people's right eye 401 was seen by lenticular sheet matrix 200 is the liquid crystal grating pixel 2 3014 of printing opacity, therefore can see the image in the LCDs 100, what left eye was seen by lenticular sheet matrix 200 is lighttight liquid crystal grating pixel 1, therefore it sees it being the LCDs of black, thereby eye image is only passed accurately for to right eye.When pixel 1 for opening, when pixel 2 3014 is the pass, this moment, display screen 100 showed is left eye 402 picture signals in the video, what people's right eye 401 was seen by lenticular sheet matrix 200 is lighttight liquid crystal grating pixel 2 3014, what therefore see is the display screen of black, what left eye 402 was seen by the lenticular sheet matrix is the liquid crystal grating pixel 2 3014 of printing opacity, so it can see the image in the display screen, thereby left-eye image is only passed accurately for to left eye.By the way, use the liquid crystal grating 300 that carries out line scanning with LCDs 100 synchronously, just can make the people see complete 3D video, and can not produce ghost image, the frequency of its scanning needs greater than 180HZ.Show that by LCDs 100 described above the 3D pattern is to show left-eye image and eye image every frame, so the type of drive that its 3D shows is consistent with the driving generation that existing main flow 3D technology flash type 3D shows, does not therefore need existing 3D resource is encoded.
In conjunction with Fig. 7 and shown in Figure 8, four pixels that pixel groups one 3015 expressions of liquid crystal grating are arranged continuously among the figure, pixel groups 2 3016 also is four pixels of arranging continuously, be the 1st, 2,3,4 pixels in the pixel cell such as pixel groups 1, pixel groups 2 3016 just is the 5th, 6,7,8 pixels in this pixel cell so, and the width of pixel groups 1 or pixel groups 2 3016 is 30*4um=120um.Therefore when pixel groups 1 when opening, pixel groups 2 3016 is the pass; When pixel groups 1 was the pass, pixel groups 2 3016 was for opening.When pixel groups 1 for opening, when pixel groups 2 3016 is closed, what LCDs 100 showed at this moment is video one picture signal, as shown in Figure 7, what be arranged in that zone two people sees by lenticular sheet matrix 200 is the liquid crystal grating pixel groups 1 of printing opacity, therefore it can see the image in the LCDs 100, what the people of zone in one saw by lenticular sheet matrix 200 is lighttight liquid crystal grating pixel groups 2 3016, therefore it sees it being the display screen of black, thereby video one is passed in the eye that replaces the people who gives in zone two.When pixel groups 1 is the pass, when pixel groups 2 3016 is opened, what LCDs 100 showed at this moment is the signal of video two, as shown in Figure 8, what be arranged in that zone two people sees by lenticular sheet matrix 200 is lighttight liquid crystal grating pixel groups 1, therefore it sees it being the display screen of black, what the people of zone in one saw by lenticular sheet matrix 200 is the liquid crystal grating pixel groups 2 3016 of printing opacity, therefore it can see the image in the display screen, thereby video two is passed in the eye that replaces the people who gives in zone one.By the way, use the liquid crystal grating 300 that carries out line scanning with LCDs 100 synchronously, can realize that just double vision shows frequently, and can not produce ghost image.The frequency of its scanning needs greater than 180HZ.Because the width of pixel groups is 120um, therefore zone one is L7*L5/L8=28cm with the width in zone two, because the human eye pupil be approximately 6.5cm apart from E, therefore the therefore width 28cm=4E in zone one and zone two can make the own favorite program of watching that people can be comfortable.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. liquid crystal grating, it is characterized in that: this liquid crystal grating is disposed with polaroid, compensate film, glassy layer, picture element matrix layer, liquid crystal layer, top electrode, glassy layer and compensate film from a side to opposite side, described picture element matrix layer comprises the multirow pixel of being made up of pixel cell, each pixel cell is made up of eight adjacent pixels, each pixel is symmetrical broken line arranges, and it is identical to be positioned at the length of every section pixel on the limit of broken line;
Wherein, every capable pixel is provided with four trace wirings, trace wiring one is used for driving second pixel and the 4th pixel of each pixel cell, trace wiring two is used for driving first pixel and the 3rd pixel of each pixel cell, trace wiring three is used for driving the 6th pixel and the 8th pixel of each pixel cell, trace wiring four-function the 5th pixel and the 7th pixel in driving each pixel cell.
2. liquid crystal grating according to claim 1, it is characterized in that: described compensate film is that the macromolecular material with negativity birefraction is formed dish-shaped liquid crystal, and is described. the ITO film of very whole the property that power on.
3. liquid crystal grating according to claim 2 is characterized in that: the pixel in the described picture element matrix layer has 20 row, and the length of every section pixel on the described limit that is positioned at broken line is 50um, and width is 30um.
4. display system, it is characterized in that: comprise LCDs, lenticular sheet matrix and above-mentioned any described liquid crystal grating of claim, described LCDs and liquid crystal grating carry out simultaneous scanning of lines and switch, described lenticular sheet matrix is positioned on the liquid crystal grating, LCD is positioned on the lenticular sheet matrix, backlight is positioned under the liquid crystal grating, and simultaneously, the liquid crystal layer of described liquid crystal grating is positioned on the focal plane of lens pillar;
Wherein, branch light action by liquid crystal grating and lens pillar, in a certain frame time, only make left eye see the left-eye image that LCD shows, only make right eye see the eye image that LCD shows in time at next frame, display system produces bore hole 3D and shows that described frame switching frequency is greater than 120HZ;
Branch light action by liquid crystal grating and lens pillar, in a certain frame time, only make first image of seeing that in a zone display shows, only make second image of seeing that in another zone display shows in time at next frame, display system produces the bore hole double vision and shows frequently.
5. display system according to claim 4, it is characterized in that: the parameter that relates in the described display system need satisfy formula:
L6=8*E*L8/(E+L8)，
L7=L8*E/L5，
Wherein, L6 is the pitch of lens pillar, and L8 is the width of liquid crystal grating pixel, L7 be lens pillar to the distance of liquid crystal grating, L5 be best image zone to the distance of lens pillar, E is people's eye pupil pitch of holes.
6. display system according to claim 5, it is characterized in that: be angle θ and 180-θ respectively on the described liquid crystal grating between every section pixel on two adjacent on described broken line limits and described lenticular sheet, described angle θ is greater than 0.57 °.
7. display system according to claim 6, it is characterized in that: the combination of described liquid crystal grating and lens pillar and described LCDs are a tilt angle theta 1 respectively, and described θ 1 is greater than 0.2 °.
8. display system according to claim 4, it is characterized in that: display system is under bore hole 3D pattern or the bore hole double vision frequency pattern, in the described liquid crystal grating, the time interval that the pixel drive signal of same trace wiring differs in a certain trace wiring and the i+1 pixel column in the i pixel column is he t/20, and wherein said t is the sweep time of a two field picture.
9. display system according to claim 4, it is characterized in that: when display system produces bore hole 3D demonstration, in the described liquid crystal grating, identical with the driving signal of trace wiring three with the trace wiring one in delegation's pixel, trace wiring two is identical with the pixel drive signal of trace wiring four, and differs on the pixel drive signal sequential of trace wiring one and trace wiring two time of scanning one two field picture.
10. display system according to claim 4, it is characterized in that: when display system generation bore hole double vision shows frequently, in the described liquid crystal grating, identical with the driving signal of trace wiring two with the trace wiring one in delegation's pixel, trace wiring three is identical with the pixel drive signal of trace wiring four, and differs on the pixel drive signal sequential of trace wiring one and trace wiring three time of scanning one two field picture.
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