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WO2015000448A1 - Réseau à fentes à cristaux liquides, dispositif d'affichage 3d et procédé de pilotage correspondant - Google Patents

Réseau à fentes à cristaux liquides, dispositif d'affichage 3d et procédé de pilotage correspondant Download PDF

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Publication number
WO2015000448A1
WO2015000448A1 PCT/CN2014/082815 CN2014082815W WO2015000448A1 WO 2015000448 A1 WO2015000448 A1 WO 2015000448A1 CN 2014082815 W CN2014082815 W CN 2014082815W WO 2015000448 A1 WO2015000448 A1 WO 2015000448A1
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WIPO (PCT)
Prior art keywords
electrode
strip electrodes
liquid crystal
strip
layer
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.)
Ceased
Application number
PCT/CN2014/082815
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English (en)
Chinese (zh)
Inventor
刘美鸿
母林
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Shenzhen Estar Displaytech Co
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Shenzhen Estar Displaytech Co
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Publication of WO2015000448A1 publication Critical patent/WO2015000448A1/fr
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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
    • G02B30/25—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type using polarisation techniques
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/30—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating

Definitions

  • the invention belongs to the field of stereoscopic display, in particular to a liquid crystal slit grating, and to a stereoscopic display device using a liquid crystal slit grating and a driving method thereof.
  • a stereoscopic display device needs to wear stereo glasses when viewing, so that viewers who wear glasses (such as glasses, reading glasses, etc.) originally need to overlap the two glasses in order to obtain a clear viewing effect, so that the stereoscopic display is performed. It is inconvenient to watch. Furthermore, since the width between the two temples of the stereoscopic glasses is generally fixed, this may make viewers of different face types unable to obtain a better experience when wearing the stereoscopic glasses. Therefore, the naked-eye stereoscopic display technology that does not need to wear stereoscopic glasses is more and more concerned.
  • the main principle of the naked-eye stereoscopic display device is to provide a grating, such as a slit grating or a cylindrical grating, in front of the display panel, and the grating provides at least two parallax images displayed by the display panel to the left and right eyes of the viewer, respectively.
  • a grating such as a slit grating or a cylindrical grating
  • the slit grating applied in the stereoscopic display device is generally a fixed grating, that is, the light-transmissive slit and the light-shielding slit of the slit grating are fixed.
  • This kind of fixing is that when the slit grating forms stereoscopic vision, the viewing area thereof is strictly limited. Exceeding the limited area, good stereoscopic vision cannot be formed, which greatly reduces the stereoscopic visual experience of the user, and is disadvantageous to the stereoscopic display technology. Promote the application.
  • the present invention provides an electronic slit grating, a stereoscopic display device, and a driving method thereof.
  • An object of the present invention is to provide a liquid crystal slit grating comprising a first polarizer, a first substrate, an upper electrode structure, a first alignment layer, a liquid crystal layer, a second alignment layer, a lower electrode structure, and a second layer which are sequentially stacked.
  • the lower electrode structure includes at least two electrode layers, and each of the electrode layers includes a plurality of strip electrodes extending in the same direction, and the strip electrodes of the at least two electrode layers are mutually Parallel, spaced, and electrically insulated from each other, strip electrodes of different electrode layers are alternately disposed corresponding to each other, so that projections of the plurality of strip electrodes on the second substrate are seamlessly projected, The liquid crystal layer corresponding to the projection area is completely covered.
  • any strip electrode is aligned with the adjacent side of the strip electrode of another layer adjacent thereto.
  • any strip electrode overlaps the adjacent side of the strip electrode of another layer of its neighbor.
  • the overlapping area of any strip electrode and the strip electrode of another layer adjacent thereto is one tenth to one third of the width of the strip electrode.
  • the strip electrodes in the same electrode layer have the same width, and the adjacent strip electrodes in the same electrode layer have the same pitch.
  • the lower electrode structure comprises two electrode layers, the widths of any strip electrodes are equal, and the spacing between adjacent strip electrodes of the same electrode layer is equal to the width of the strip electrodes, and is in the same electrode layer.
  • the strip electrodes are alternately arranged to each other corresponding to the gap between the other strip electrodes.
  • the lower electrode structure comprises three electrode layers, the widths of any strip electrodes are equal, and the spacing of adjacent strip electrodes of the same electrode layer is equal to twice the width of the strip electrodes, and is in the same layer.
  • the strip electrodes are alternately arranged to each other corresponding to the gap between the strip electrodes in the other electrode layers.
  • the parameters of the light-shielding slit and the light-transmitting slit formed by the electron slit grating are adjusted by configuring an electric field between the strip electrode and the upper electrode structure.
  • It is an object of the present invention to provide a stereoscopic display device comprising:
  • a display panel for displaying a left eye image and a right eye image having parallax of the same scene
  • An electron slit grating disposed on a display surface of the display panel including a first polarizer disposed in sequence, a first substrate, an upper electrode structure, a first alignment layer, a liquid crystal layer, and a second alignment a layer, a lower electrode structure, a second substrate, and a second polarizer
  • the lower electrode structure includes at least two electrode layers
  • each of the electrode layers includes a plurality of strip electrodes extending in the same direction, the at least two layers
  • the strip electrodes in the electrode layer are disposed parallel to each other, spaced apart and electrically insulated, and the strip electrodes of the different electrode layers are alternately disposed corresponding to each other with a gap therebetween, so that the plurality of strip electrodes are on the second substrate
  • the projection on the side is a seamless projection, completely covering the liquid crystal layer corresponding to the projection area.
  • the electric field between the strip electrode and the upper electrode structure is over-aligned for different viewing positions to adjust the parameters of the light-shielding slit and the light-transmitting slit formed by the liquid crystal slit grating, thereby making the left and right eyes of the viewer Corresponding to viewing the left eye image and the right eye image displayed on the display panel.
  • any strip electrode is aligned with the adjacent side of the strip electrode of another layer adjacent thereto.
  • any strip electrode overlaps the adjacent side of the strip electrode of another layer of its neighbor.
  • the overlapping area of any strip electrode and the strip electrode of another layer adjacent thereto is one tenth to one third of the width of the strip electrode.
  • the strip electrodes in the same electrode layer have the same width, and the adjacent strip electrodes in the same electrode layer have the same pitch.
  • the lower electrode structure comprises two electrode layers, the widths of any strip electrodes are equal, and the spacing between adjacent strip electrodes of the same electrode layer is equal to the width of the strip electrodes, and is in the same electrode layer.
  • the strip electrodes are alternately arranged to each other corresponding to the gap between the other strip electrodes.
  • the lower electrode structure comprises three electrode layers, the widths of any strip electrodes are equal, and the spacing of adjacent strip electrodes of the same electrode layer is equal to twice the width of the strip electrodes, and is in the same layer.
  • the strip electrodes are alternately arranged to each other corresponding to the gap between the strip electrodes in the other electrode layers.
  • An object of the present invention is to provide a driving method for the above-described stereoscopic display device, and the stereoscopic display device using the driving method includes:
  • a display panel for displaying a left eye image and a right eye image having parallax of the same scene
  • the lower electrode structure includes at least two electrode layers, and each of the electrode layers includes a plurality of strip electrodes extending in the same direction, the at least two layers of electrodes
  • the strip electrodes in the layer are arranged parallel to each other, spaced apart and electrically insulated, and the strip electrodes of the different electrode layers are alternately arranged corresponding to each other with a gap therebetween, so that the plurality of strip electrodes are on the second substrate
  • the projection is a seamless projection that completely covers the corresponding liquid crystal layer of the projection area.
  • the driving method includes:
  • the display panel displays a left eye image and a right eye image with parallax of the same scene
  • the parameters of the light-shielding slit and the light-transmitting slit formed by the liquid crystal slit grating are adjusted, so that the left and right eyes of the viewer respectively view the left eye Image and right eye image.
  • the parameters of the electronic slit grating include at least one of a pitch, a width of the transparent slit, and a position of the transparent slit.
  • the moving direction of the position at which the light-transmitting slit is adjusted coincides with the moving direction of the viewing position of the viewer.
  • the lower electrode structure comprises a plurality of electrode layers, each of the electrode layers comprises a plurality of strip electrodes arranged in parallel, and the strip electrodes on the different electrode layers can complement each other's gaps, in the second
  • the planar projection of the substrate covers the entire area, so that it is not necessary to provide a light-shielding strip between the strip electrodes, and light leakage on the light-shielding slit or the light-transmissive slit can be avoided, thereby further improving the quality of the liquid crystal slit grating.
  • the pitch of the liquid crystal slit grating, the width of the light transmission slit, and the position of the light transmission slit can be adjusted.
  • Such specific parameters can keep the user in the best viewing position, improve the user's stereoscopic viewing experience, and promote the promotion and application of stereoscopic display technology.
  • FIG. 1 is a schematic structural view of an embodiment of a stereoscopic display device provided by the present invention
  • FIG. 2 is a schematic view showing another working state of an embodiment of a stereoscopic display device provided by the present invention
  • FIG. 3 is a schematic view showing another working state of an embodiment of a stereoscopic display device provided by the present invention.
  • FIG. 4 is a schematic structural view of an embodiment of a liquid crystal slit grating provided by the present invention.
  • Figure 5 is a plan view showing the structure of a portion of the liquid crystal slit grating shown in Figure 4;
  • FIG. 6a-6d are schematic diagrams showing four working states of the liquid crystal slit grating shown in FIG. 5;
  • FIG. 7 is a schematic structural view of a second embodiment of a liquid crystal slit grating provided by the present invention.
  • FIG. 1 is a schematic structural diagram of an embodiment of a stereoscopic display device according to the present invention.
  • the stereoscopic display device 100 includes a display panel 101 and a controllable slit grating 102 disposed on a display surface of the display panel 101 .
  • the display panel 101 is a flat display device for generating a left-eye image L and a right-eye image R having parallax of the same scene, wherein the left-eye image L and the right-eye image R may be, for example, strip images, respectively, and are horizontally mutually Alternately displayed on the reality panel 101.
  • the display panel 101 may be, for example, a liquid crystal display device, a plasma display device, an organic light emitting diode display device, an electroluminescence display device, or the like, which will not be enumerated here.
  • the controllable slit grating 102 is a slit grating which can be controlled to form a light-shielding slit and a light-transmitting slit at a specific position thereof, and generally can form an alternating structure of a light-transmitting slit and a light-shielding slit, thereby allowing viewing
  • the left eye passes through the light transmission slit, only the left eye image L displayed on the display panel 101 can be seen, and the right eye can only see the right eye image R displayed on the display panel 101. Since the left-eye image L and the right-eye image R are images having parallax of the same scene, the viewer generates stereoscopic vision according to different parallax images received by the left and right eyes.
  • the viewer moves a certain distance relative to the stereoscopic display device 100, for example, at the first moment, the viewer is at the position shown in FIG. 1, and at the second moment, the viewer moves a certain distance relative to the display device 100 to the middle thereof, as shown in FIG. 2.
  • the controllable slit grating 102 holds the light-transmitting slit and the light-shielding slit shown in FIG. 1, the left and right eyes will not be able to see the corresponding left-eye image L and right-eye image R, causing visual confusion and failing to form a three-dimensional shape. Vision.
  • the position shown in FIG. 2 is adjusted, that is, the light-transmitting slit of the controllable slit grating 102 is relative to the display panel 101. Move to the middle position. After adjustment, the left eye of the viewer of the current position can still see only the left eye image L displayed on the display panel 101 through the light transmission slit, while the right eye can only see the right eye image displayed on the display panel 101. R.
  • the position of the viewer ie, the position of the eye
  • the position of the light-shielding slit and the light-transmissive slit of the controllable slit grating 102 is changed correspondingly, and the left eye of the viewer with parallax can still be ensured by the viewer.
  • the image L and the right eye image R maintain good stereoscopic vision.
  • the position of the light-transmissive slit of the controllable slit grating 102 can be continuously adjusted to move to the right direction shown in FIG.
  • the left eye image L and the right eye image R having parallax are still kept by the viewer left and right eyes, and the stereoscopic vision is maintained, and the stereoscopic viewing experience of the viewer is improved.
  • the light-transmitting slits and the light-shielding slits of the controllable slit grating 102 are adjusted.
  • the position can keep the viewer with good stereo vision.
  • the moving direction of the light-transmitting slit is consistent with the direction in which the viewer's eyes move.
  • the left-eye image L and the right-eye image R displayed by the display panel 101 are rearranged, it is also possible to make the light-transmissive narrow.
  • the direction of movement of the slit does not coincide with the direction of movement of the viewer's eye, or even the opposite.
  • the change of the left and right eye images should be taken into consideration, and the position of the light-transmissive slit and the light-shielding slit of the controllable slit grating 102 can be reasonably adjusted, so that the left and right eyes of the viewer can be viewed in real time.
  • the left eye image L and the right eye image R are accurate.
  • controllable slit grating 102 can adjust the positions of the light-transmissive slit and the light-shielding slit, and can also adjust parameters such as the grating section, the pitch, the slit width of the light-transmitting slit and the light-shielding slit, and the viewer The eye can respectively view the left eye image L and the right eye image R in real time.
  • the controllable slit grating 102 may be a liquid crystal slit grating, an electrophoresis slit grating, an electrowetting slit grating, or the like, and is not specifically limited herein.
  • the present invention also provides an electrically controllable liquid crystal slit grating.
  • the liquid crystal slit grating may include two spaced electrode structures and a liquid crystal layer. Wherein, the liquid crystal layer is disposed between the two electrode structures, and the liquid crystal layer includes a plurality of liquid crystal molecules.
  • an electric field is formed between the two electrode structures, and the electric field causes the liquid crystal molecules to be in a predetermined arrangement state to form a liquid crystal slit grating having a slit function.
  • FIG. 4 is a schematic structural diagram of a first embodiment of a liquid crystal slit grating provided by the present invention.
  • the liquid crystal slit grating 200 includes a first polarizing plate 21, a first substrate 22, an upper electrode structure 23, a first alignment layer 24, which are stacked in order, in order from top to bottom as shown in FIG.
  • the specific structure and function of the liquid crystal layer 25, the second alignment layer 26, the lower electrode structure 27, the second substrate 28, and the second polarizer 29 are as follows.
  • the first substrate 22 and the second substrate 28 are disposed in parallel, the upper electrode structure 23 (also referred to as a common electrode) is disposed inside the first substrate 22, and the lower electrode structure 27 (driving electrode) is disposed inside the second substrate 28, thereby The electrode structure upper electrode structure 23 is disposed opposite to the lower electrode structure 27, and an electrically controlled electric field can be formed therebetween.
  • the upper electrode structure 23 also referred to as a common electrode
  • the lower electrode structure 27 driving electrode
  • the liquid crystal layer 25 is disposed between the upper electrode structure 23 and the lower electrode structure 27, and includes rod-like liquid crystal molecules 251 therein.
  • the first alignment layer 24 is disposed between the liquid crystal layer 25 and the upper electrode structure 23, and the second alignment layer 26 is disposed between the liquid crystal layer 25 and the lower electrode structure 27.
  • the alignment direction of the first alignment layer 24 and the second alignment layer 26 is perpendicular or a specific angle (for example, less than 90 degrees or greater than 90 degrees) is set according to actual needs, so that the liquid crystal molecules 251 in the liquid crystal layer 25 can be subjected to actual needs. Orientation.
  • FIG. 5 is a schematic plan view showing the upper electrode structure 23 and the lower electrode structure 27 of the liquid crystal slit grating 200 shown in FIG.
  • the upper electrode structure 23 may be a planar electrode, or may be formed into other shapes, a plurality of partitions, or the like according to actual needs.
  • the electrode structure 23 is a planar electrode.
  • the lower electrode structure 27 includes at least two electrode layers. This embodiment is exemplified by including two electrode layers, and the two electrode layers are respectively referred to as a first electrode layer 271 and a second electrode layer 272, wherein the first electrode layer 271 is adjacent to the liquid crystal.
  • the layer 25 is disposed, and the second electrode layer 272 is disposed adjacent to the inner side of the second substrate 28.
  • the first electrode layer 271 includes a plurality of first strip electrodes 271a arranged in parallel, and the plurality of first strip electrodes 271a are alternately spaced and electrically isolated from each other, and both are along the first extending direction D1 (ie, perpendicular to the paper in FIG. 4) The direction of the face) extends.
  • the second electrode layer 272 includes a plurality of second strip electrodes 272a disposed in parallel, and the plurality of second strip electrodes 272a are alternately spaced and electrically isolated from each other, and both are along the first extending direction D1 (ie, perpendicular to the paper in FIG. 4) The direction of the face) extends. And the position where the second strip electrode 272a is located is in the interval of the plurality of first strip electrodes 271a, so that the plurality of first strip electrodes 271a and the plurality of second strip electrodes 272a form a complementary relationship, Forming a complete gap-free (seamless) projection surface of the second substrate 28 can completely cover the liquid crystal layer 25 in the region.
  • the adjacent side of the first strip electrode 271a and the adjacent second strip electrode 272a are aligned, so as to minimize the electrical signal interference between the two, and the two can completely cover the liquid crystal in the area.
  • the layer 25 prevents the occurrence of light leakage when the liquid crystal slit is formed.
  • the edge of the first strip electrode 271a adjacent to the adjacent second strip electrode 272a may be overlapped.
  • the overlap region may be the first strip electrode 271a or the second strip.
  • a planarized insulating layer 27 is also provided to fill the space between the first strip electrode 271a and the second strip electrode 272a.
  • the insulating layer 27 may be made of silicon nitride or silicon oxide or other transparent material.
  • the plurality of first strip electrodes 271a and the plurality of second strip electrodes 272a have the same structure, and are rectangular strip electrodes having the same length, width, and pitch, thereby forming a light-shielding slit and a light-transmitting slit.
  • the driving voltage V1 may be periodically applied to the adjacent strip electrodes 271a/272a for forming the light shielding slit, and the other strip electrodes 271a.
  • a zero voltage V0 or a reference voltage Vref is applied to /272a for forming a light transmissive slit.
  • the ratio and width of the light-shielding slit and the light-transmitting slit can be changed, thereby adjusting the grating pitch and the pitch of the liquid crystal slit grating, An electrically controllable dynamic liquid crystal slit grating is realized, which will be described in detail later.
  • the width and the ratio of the light-shielding slit and the light-transmissive slit need to be adjusted according to the parameter configuration of the specific stereoscopic display device, and will not be described herein.
  • the first polarizer 21 is disposed outside the first substrate 22, that is, on the side opposite to the first alignment film 24.
  • the second polarizer 29 is disposed outside the second substrate 28, that is, on the side opposite to the second alignment film 27.
  • the first polarizer 21 and the second polarizer 29 may also be disposed on the inner side of the first substrate 22 and the second substrate 28, which are not specifically limited herein.
  • the polarization direction of the first polarizer 21 is the same as the alignment direction of the first alignment layer 24; the polarization direction of the second polarizer 29 is the same as the alignment direction of the second alignment layer 26.
  • the alignment direction of the first alignment layer 24 and the polarization direction of the first polarizer 21 extend along the second extension direction D2; the alignment direction of the second alignment layer 26, and the second The polarization directions of the polarizers 29 all extend in the first extending direction D1.
  • the first extending direction D1 and the second extending direction D2 are perpendicular to each other.
  • the first alignment layer 24 and the second alignment layer 26 may be aligned by frictional alignment or radiation alignment.
  • the liquid crystal layer 25 includes liquid crystal molecules 251. Under the alignment of the first alignment layer 24 and the second alignment layer 26, the liquid crystal molecules 251 form a twisted arrangement as shown in FIG.
  • the liquid crystal layer 25 may be a polymer dispersed (PDLC) type liquid crystal layer, or a nematic curve induced phase (NCAP) type liquid crystal layer, or a non-uniform polymer dispersed (NPD-LCD) type liquid crystal layer.
  • PDLC polymer dispersed
  • NCAP nematic curve induced phase
  • NPD-LCD non-uniform polymer dispersed
  • the first substrate 22 and the second substrate 28 may be made of a transparent transparent material such as transparent glass or quartz, or may be made of a soft transparent material such as plastic, as long as the light can be transmitted. List one by one.
  • the upper electrode structure 23 and the lower electrode structure 27 are made of a transparent conductive material, such as indium tin oxide (Indium Tin). Oxide, ITO) or Indium Zinc Oxide (IZO), not listed here.
  • a transparent conductive material such as indium tin oxide (Indium Tin). Oxide, ITO) or Indium Zinc Oxide (IZO), not listed here.
  • liquid crystal slit grating 200 when a plurality of strip electrodes (for example, all of the first strip electrodes 271a) are separated one by one, a driving voltage V1 is simultaneously applied, and a plurality of strip electrodes (for example, all second strips) are additionally separated one by one.
  • the same zero voltage V0 or reference voltage Vref is simultaneously applied to the electrode 272a) and the upper electrode structure 23.
  • the polarized light having the same polarization direction as the polarization direction of the second polarizer 29 When the polarized light having the same polarization direction as the polarization direction of the second polarizer 29 is propagated from the second substrate 28 toward the first substrate 22, the polarized light can be worn in the strip-shaped region corresponding to the first strip electrodes 271a spaced one by one.
  • the second substrate 28 is passed while the liquid crystal molecules 251 do not change the polarization direction of the polarized light, the polarized light cannot pass through the first polarizer 21, and the slit is shielded in the outer shape of the first substrate 22; and the plurality of second strips are separated one by one.
  • the polarized light passes through the second substrate 28, and under the action of the twisted liquid crystal molecules 251, the polarization direction of the polarized light is gradually changed to the polarized light having the same polarization direction as that of the first polarizer 21, The polarized light may pass through the first polarizer 21 to form a light-transmitting slit outside the first substrate 22.
  • the light-shielding slits are alternately arranged with the light-transmissive slits, and function similarly to the conventional slit gratings, thereby forming a slit grating having a ratio of a light-shielding slit to a light-transmitting slit as shown in FIG. 6a of 1:1.
  • a method for realizing stereoscopic display by using a liquid crystal slit grating in conjunction with a display panel has been known to the public and will not be described herein.
  • the driving voltage V1 is simultaneously applied to the plurality of strip electrodes (for example, all of the second strip electrodes 272a) separated one by one, and the plurality of strip electrodes (for example, all of the first strip electrodes 271a) and the upper ones are separated one by one.
  • the same zero voltage V0 or reference voltage Vref is simultaneously applied to the electrode structure 23.
  • a slit grating having a light-shielding slit and a light-transmissive slit ratio of 1:1 as shown in FIG. 6b can be formed, and the slit grating shown in FIG. 6b is equivalent to that shown in FIG. 6a.
  • the illustrated slit grating produces a displacement that moves half a pitch to the right.
  • the light-shielding slit and the light-transmitting slit can be moved to the left or right by any number of pitches, which will not be described herein.
  • the driving voltage V1 may be periodically applied to the adjacent two strip electrodes (ie, a first strip electrode 271a and a neighboring second strip electrode 272a).
  • the other strip electrode i.e., a first strip electrode 271a or a second strip electrode 272a
  • V0 or Vref a reference voltage
  • the ratio is a 2:1 slit grating.
  • the shading slit and the light transmission of the controllable slit grating 102 can be adjusted.
  • the specific parameters of the slit enable the user to always be in the best viewing position and improve the user's stereoscopic viewing experience.
  • the dynamic scanning method is used to control the formation of the liquid crystal slit grating 200, and the display driving method with time division and spatial division can improve the resolution of the stereoscopic display, that is, the resolution of the stereoscopic image can be consistent with the resolution of the display. Reduce the resolution loss of stereo images, greatly improve the stereo display quality and user experience.
  • the liquid crystal slit grating 200 can be adjusted according to actual stereoscopic display requirements. Parameters such as grid, pitch, period, slit width, etc., better realize stereoscopic display, so that the user is always in the best viewing position, greatly improving the user's stereoscopic experience.
  • FIG. 7 is a schematic structural diagram of another embodiment of a liquid crystal slit grating provided by the present invention. Since the liquid crystal slit grating 400 of the present embodiment is similar in structure to the liquid crystal slit grating 200 of the first embodiment shown in FIG. 4, FIG. 7 only indicates and explains the main differences thereof. Compared with the liquid crystal slit grating 200 shown in FIG. 4, the liquid crystal slit grating 400 mainly differs in that:
  • the lower electrode structure 47 includes three electrode layers stacked in a stack, which are denoted as a first electrode layer 471, a second electrode layer 472, and a third electrode layer 473, respectively.
  • the first electrode layer 471 is disposed adjacent to the liquid crystal layer 45
  • the third electrode layer 473 is disposed adjacent to the inner side of the second substrate 48
  • the second electrode layer 472 is disposed between the first electrode layer 471 and the third electrode layer 473.
  • a planarized first insulating layer is disposed between the first electrode layer 471 and the second electrode layer 472. 474.
  • a planarized second insulating layer 475 is disposed between the second electrode layer 472 and the third electrode layer 473.
  • the first insulating layer 474 and the second insulating layer 475 may be made of silicon nitride or silicon oxide or other transparent material.
  • the first electrode layer 471 includes a plurality of parallel and spaced first strip electrodes 471a
  • the second electrode layer 472 includes a plurality of parallel and spaced second strip electrodes 472a
  • the third electrode layer 473 includes a plurality of A third strip electrode 473a arranged in parallel and spaced apart.
  • the first strip electrode 471a, the second strip electrode 472a, and the third strip electrode 473a have the same width and extend in the same direction. And between the adjacent first strip electrodes 471a or between the second strip electrodes 472a or between the third strip electrodes 473a are spaced apart by two strip electrode widths, and the second strip electrodes 472a and the third strip electrodes 473a is respectively moved to the right by a strip electrode width and the distance between the two strip electrodes with respect to the first strip electrode 471a, so that the edges thereof are aligned, thereby mutually complementing the gaps between the electrodes without causing overlap between each other, and avoiding Light leakage phenomenon when forming a light-shielding slit or a light-transmitting slit.
  • the lower electrode structure 47 can also be divided into four layers, five layers, and the like as needed, similar to the above structure, and is not limited herein.
  • the driving method of the liquid crystal slit grating 400 is similar to the driving method of the liquid crystal lens 200 described above, and will not be described herein.
  • the first strip electrode 471a, the second strip electrode 472a, and the third strip electrode 473a have the same or similar structures and parameters, and are arranged parallel to each other, and adjacent Edge aligned or partially overlapping.
  • the first strip electrode 471a, the second strip electrode 472a, and the third strip electrode 473a can complement each other's gaps, covering the entire area on the plane projection, so that it is not necessary to be in the first
  • a light shielding strip is disposed between the strip electrode 471a, the second strip electrode 472a, and the third strip electrode 473a, and light leakage on the light shielding slit or the light transmission slit can be avoided, and at the same time, the three are the same or similar.
  • the structure and parameters provide more operation space for adjusting parameters such as the grid pitch and the pitch of the liquid crystal slit grating 400, and further improve the quality of the liquid crystal slit grating and the stereoscopic display device used therewith.
  • the embodiment of the present invention sets the lower electrodes 27, 47 of the liquid crystal slit gratings 200, 400 to a multi-layer structure, and the plurality of electrodes overlap each other or partially, thereby completely covering the lower electrodes.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Geometry (AREA)

Abstract

L'invention concerne un réseau à fentes à cristaux liquides comprenant en un empilement ordonné, une première feuille de polarisation, un premier substrat, une structure d'électrode supérieure, une première couche d'alignement, une couche de cristaux liquides, une seconde couche d'alignement, une structure d'électrode inférieure, un second substrat et une seconde feuille de polarisation; la structure d'électrode inférieure comprend au moins deux couches de couches d'électrodes, chaque couche d'électrode comprenant plusieurs électrodes en ruban s'étendant dans la même direction; les électrodes en ruban dans les au moins deux couches d'électrodes sont disposées selon une configuration parallèle, séparée et électriquement isolées les unes des autres, et les électrodes en ruban dans les différentes couches d'électrodes sont ménagées de manière à correspondre aux espaces vides entre elles et dans une configuration alternative, de sorte que la projection des multiples électrodes en ruban sur le second substrat soit une projection continue et recouvre complètement la couche de cristaux liquides correspondant à la zone de projection. Le réseau à fentes à cristaux liquides selon l'invention peut ajuster les paramètres tels que l'écartement du réseau, les largeurs des fentes émettant la lumière, et les positions des fentes émettant la lumière. L'invention concerne également un dispositif d'affichage 3D utilisant le réseau à fentes à cristaux liquides et le procédé de pilotage du dispositif d'affichage 3D.
PCT/CN2014/082815 2013-07-02 2014-07-23 Réseau à fentes à cristaux liquides, dispositif d'affichage 3d et procédé de pilotage correspondant Ceased WO2015000448A1 (fr)

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