WO2019007061A1 - 用于双视显示的光栅及双视显示装置 - Google Patents

用于双视显示的光栅及双视显示装置 Download PDF

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Publication number
WO2019007061A1
WO2019007061A1 PCT/CN2018/075557 CN2018075557W WO2019007061A1 WO 2019007061 A1 WO2019007061 A1 WO 2019007061A1 CN 2018075557 W CN2018075557 W CN 2018075557W WO 2019007061 A1 WO2019007061 A1 WO 2019007061A1
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Prior art keywords
lens unit
light
unit
grating
lens
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PCT/CN2018/075557
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English (en)
French (fr)
Inventor
陈秀云
尹大根
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
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Application filed by 京东方科技集团股份有限公司, 北京京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/318,628 priority Critical patent/US10782457B2/en
Publication of WO2019007061A1 publication Critical patent/WO2019007061A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1814—Diffraction gratings structurally combined with one or more further optical elements, e.g. lenses, mirrors, prisms or other diffraction gratings
    • 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
    • G02F1/1323—Arrangements for providing a switchable viewing angle
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133526—Lenses, e.g. microlenses or Fresnel lenses
    • 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 present disclosure relates to the field of optics, and more particularly to a raster and dual view display device for dual view display.
  • Grating is an optical component that uses the principle of multi-slit diffraction to disperse light.
  • gratings are increasingly used in metrology, spectroscopy, optical communication, information processing, display technology and so on.
  • a raster can be applied to display technology to achieve dual view display.
  • the grating can be disposed on the light-emitting side of the display panel, and under the action of the grating, the viewer on the left side can only see the even (or odd) pixel columns when viewing.
  • the viewer on the right side can only see odd (or even) pixel columns when viewing, so that by displaying the first image in the even pixel column and the second image in the odd pixel column, the left side can be The viewer on the right side sees different images and achieves the effect of double-view display.
  • Embodiments of the present disclosure provide a grating for dual view display, including: a plurality of alternately distributed light transmitting units and a light shielding unit; the light transmitting unit includes a first lens unit and a second lens unit, wherein The first lens unit is configured to converge light incident therein to a first direction to achieve image display of a first viewing angle, the second lens unit being configured to converge light incident thereto in a second direction to achieve The image of the second perspective is displayed.
  • the first direction is a direction inclined away from a side where the longitudinal center of the light transmitting unit faces the first lens unit
  • the second direction is a direction away from a longitudinal center of the light transmitting unit
  • the direction in which the side of the second lens unit is inclined, the first lens unit and the second lens unit are respectively located at two sides of a longitudinal center plane of the light transmitting unit.
  • the light transmitting unit and the light shielding unit are both strip-shaped.
  • the first lens unit and the second lens unit in the same light transmitting unit are adjacent to each other.
  • the first lens unit and the second lens unit are each composed of one or more converging lenses.
  • the converging lens is a convex lens.
  • each of the first lens unit and the second lens unit is adjacent to one of the shading units on a side remote from the longitudinal center plane.
  • each of the first lens unit and the second lens unit overlaps with one of the shading units on a side away from the longitudinal center plane.
  • the grating further includes a transparent substrate for carrying the first lens unit, the second lens unit, and the light shielding unit.
  • the first lens unit, the second lens unit, and the transparent substrate are of unitary structure.
  • the transparent substrate has a groove structure, and an inner wall of the groove structure constitutes a curved surface structure of the first lens unit and the second lens unit.
  • the first lens unit and the second lens unit are formed by a raised structure disposed on the transparent substrate.
  • a distance from a top edge of the side of the first lens unit facing the adjacent light shielding unit to the longitudinal center plane is greater than a bottom edge of the side of the first lens unit to the longitudinal center plane the distance.
  • a distance from a top edge of the second lens unit toward a side of the adjacent shading unit to the longitudinal center plane is greater than a bottom edge of a side of the second lens unit to the longitudinal center plane the distance.
  • the shading unit comprises a light shielding layer composed of a non-transmissive material.
  • the light shielding layer is located on a light exiting side of the transparent substrate; the grating further includes a reflective layer, the reflective layer is located in the light shielding unit, and is disposed on the transparent substrate and the light shielding layer between.
  • the grating further includes a dot located on a light incident side of the transparent substrate for scattering light reflected by the reflective layer to the first lens unit and the The second lens unit is described.
  • the dots are integral with the transparent substrate.
  • An embodiment of the present disclosure also provides a dual view display device comprising the grating as described in any of the above embodiments.
  • the dual view display device is a liquid crystal display device including a backlight module and a liquid crystal display panel, and the grating is located between the backlight module and the liquid crystal display panel.
  • 1a is a schematic structural view of a dual view display device
  • FIG. 2 is a schematic structural diagram of a grating for a dual view display device according to an embodiment of the present disclosure
  • Figure 3 is a cross-sectional structural view of Figure 2 along the O-O' position
  • FIG. 4 is a schematic cross-sectional structural view of another grating according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram of an optical path of a grating according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of a grating according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of another grating according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of still another grating according to an embodiment of the present disclosure.
  • 9a is a schematic diagram of an optical path of a grating according to an embodiment of the present disclosure.
  • 9b is a schematic diagram of an optical path of another grating according to an embodiment of the present disclosure.
  • 10a is a schematic structural diagram of a dual view display device including a grating according to an embodiment of the present disclosure
  • FIG. 10b is a schematic structural diagram of another dual view display device including a grating according to an embodiment of the present disclosure.
  • the dual-view display device includes a grating 01 on the light-emitting side of the display panel 02.
  • the grating 01 Under the action of the grating 01, the viewer on the left side is When viewing, only the even (or odd) pixel columns can be seen, and the viewer on the right can only see odd (or even) pixel columns when viewing, thus displaying the first image in even pixel columns.
  • P1 the second image P2 is displayed in the odd pixel column, so that the left and right viewers can see different images, and the effect of double view display is realized.
  • the region (the angle corresponding to the angle ⁇ is blind , hereinafter referred to as The observed image of the ⁇ - blind region is an overlapping image of the first image P1 and the second image P2, that is, a normal display image cannot be observed, only the regions on the left and right sides of the region (angles ⁇ L and ⁇ R
  • the corresponding regions, hereinafter referred to as ⁇ L and ⁇ R regions can normally observe the first image P1 and the second image P2, respectively.
  • located emergent ray [theta] blind area can not be properly utilized, such that located ⁇ L and ⁇ R region effectively an insufficient luminance of emitted light ( Generally, the luminance value of the region is less than 200 nit), that is, the dual-view display device of the related art has a low effective utilization rate of light.
  • Embodiments of the present disclosure provide a grating for dual view display.
  • the grating may include a plurality of alternately distributed light transmitting units 10 and a light blocking unit 20.
  • the light transmitting unit 10 includes a first lens unit 101 and a second lens unit 102.
  • the first lens unit 101 is configured to converge light incident therein to a first direction to achieve image display of a first viewing angle, the second lens unit 102 being configured to direct light incident therein to a second direction Convergence to achieve image display of the second perspective.
  • the grating 01 includes a plurality of strip-shaped light transmitting units 10 and a strip-shaped light shielding unit 20, and the light transmitting unit 10 and the light shielding unit 20 are alternately distributed.
  • Each of the light shielding units 20 is located between the adjacent two light transmission units 10.
  • the light transmitting unit 10 includes strip-shaped first lens units 101 and strip-shaped second lens units 102 which are respectively disposed on both sides of the longitudinal center plane L of the light transmitting unit 10 and are disposed in parallel next to each other.
  • Fig. 3 (a cross-sectional view taken along the O-O' position in Fig. 2), light rays transmitted through the first lens unit 101 and the second lens unit 102 are respectively concentrated toward the first direction and the second direction.
  • the extending direction of the longitudinal center plane L is the same as that of the light transmitting unit 10 and the light shielding unit 20, and in the embodiment of Fig. 2, both are up and down directions.
  • the longitudinal center plane L may also be referred to as a center plane in the width direction.
  • the first direction may be a direction away from the longitudinal center plane L of the light transmitting unit 10 toward the side where the first lens unit 101 is located (see the x direction in FIGS. 5 and 6)
  • the second direction It may be a direction that is inclined away from the longitudinal center plane L of the light transmitting unit 10 toward the side where the second lens unit 102 is located (see the y direction in FIGS. 5 and 6).
  • the first lens unit 101 and the second lens unit 102 are respectively located on both sides of the longitudinal center plane L of the light transmitting unit 10.
  • the inclination angles of the first direction and the second direction with respect to the longitudinal center plane L of the light transmitting unit 10 those skilled in the art can select according to the display requirements of the first angle of view and the second angle of view described above.
  • the first lens unit 101 and the second lens unit 102 in the same light transmitting unit 10 are adjacent to each other.
  • the first lens unit 101 may be a strip lens (such as a converging lens, such as a convex lens) located in the light transmitting unit 10, or may be located in the light transmitting unit 10.
  • the lens of the lens (such as a converging lens, such as a convex lens) is not limited in this disclosure; the second lens unit 102 and the first lens unit 101 can be arranged in the same manner, and will not be described here;
  • the first lens unit 101 and the second lens unit 102 are both a strip-shaped convex lens located in the light transmitting unit 10, and the present disclosure will be further described.
  • the converging lens is not limited to a convex lens, which may be any lens having a converging function known in the related art.
  • first lens unit 101 and the second lens unit 102 may be two independent structures arranged side by side, or may be a unitary structure, which is not limited in the embodiment of the present disclosure, and may be according to actual needs. Make settings.
  • the first lens The unit 101 and the second lens unit 102 are respectively adjacent or overlapped with a light shielding unit 20 on a side away from the longitudinal center plane L.
  • the first lens unit 101 and the second lens unit 102 are respectively away from each other.
  • the longitudinal center plane L side is not adjacent to the corresponding light shielding unit 20 or has a gap.
  • the present disclosure is not limited thereto, as long as it can be ensured that the lens unit can be disposed without being disposed in the light transmission unit 10 .
  • At least part of the outgoing light located near the longitudinal center plane position ⁇ blind region passes through the lens to change the light direction.
  • the dotted light exit direction when the lens is not provided is changed to the solid line light exit direction by the action of the lens ( In other words, the light emitted from A1 when the light A is never provided with a lens is changed to the light emitted by A2, and can be effectively utilized.
  • the brightness of the ⁇ - blind region is reduced, and the brightness of the left field of view and the right field of view is increased; on the other hand, the ⁇ L region and ⁇ can be adjusted not only by adjusting the width ratio between the light-transmitting unit 10 and the light-shielding unit 20;
  • the direction of the outgoing ray of the R region can further adjust the direction of the ray of the ⁇ L region and the ⁇ R region by adjusting the inclination of the convex surface of the first lens unit 101 and the second lens unit 102 (such as a convex lens), respectively.
  • Symmetrical or symmetrical adjustment (refer to FIG.
  • the longitudinal center plane L side is adjacent to or overlaps with the corresponding shading unit 20.
  • the light directly passes through the strip slit (the light transmitting unit without the lens), resulting in overlapping of light rays in the vicinity of the longitudinal center plane region.
  • the light is not normally used; and in the embodiment of the present disclosure, the first lens unit and the second lens unit, by the convergence of the light of the lens, enable at least part of the light originally located in the region near the longitudinal center plane Converging toward the left field of view and the right field of view, respectively, in the direction away from the longitudinal center plane by the action of the first lens unit and the second lens unit, that is, the dual-view display device using the grating of the present disclosure can improve the effective light Utilization, such that the luminance values of the left and right fields of view increase.
  • the embodiment of the present disclosure is not limited thereto, and the light-transmitting unit and the light-shielding unit may further be other than the strip shape.
  • the shape is as long as it can satisfy the above-described dual-view display function.
  • Embodiments of the present disclosure also provide a dual view display device including the above-described grating having the same structure and advantageous effects as the grating provided by the foregoing embodiments. Since the foregoing embodiment has been described in detail for the structure and advantageous effects of the grating, it will not be described herein.
  • the dual-view display device may specifically include at least a liquid crystal display panel and an organic light emitting diode display panel.
  • the display panel may be applied to any of a liquid crystal display, a liquid crystal television, a mobile phone, or a tablet computer.
  • the grating 01 in the present disclosure will be further explained below in conjunction with a dual view display device.
  • the grating 01 further includes a first lens unit 101 for carrying The lens unit 102 and the transparent substrate 30 of the light shielding unit 20, wherein the light shielding unit 20 may generally include a light shielding layer 200 composed of a non-transmissive material (for example, mainly composed of a black matrix material) to avoid light from the position of the light shielding unit 20.
  • a black matrix material which is not only cheap, but also has a simple manufacturing process. For example, it can be formed by an inkjet printing process or an etching process, which is not limited in the present disclosure, and can be performed according to actual needs. select.
  • the first lens unit 101, the second lens unit 102, and the shading unit 20 can be directly fabricated on the transparent substrate 30, and the grating 01 is integrally mounted to the dual-view display device after the fabrication is completed, thereby simplifying The manufacturing process and the purpose of the installation; on the other hand, the thickness of the transparent substrate 30 can be adjusted so that the grating 01 can be applied to the double-view display device of different sizes under the support of the transparent substrate 30, for example, for a large-sized double-view display. The device can increase the thickness of the transparent substrate 30 to avoid deformation due to gravity at the center position of the grating 01.
  • the first lens unit 101, the second lens unit 102 and the transparent substrate 30 may be an integrated structure, for example, by an injection molding process. Made in one molding. The specific arrangement of the integrated structure will be further described below.
  • the first lens unit 101 and the second lens unit 102 are convex structures provided on the transparent substrate 30.
  • the transparent substrate 30 has a groove structure 301, and the inner wall of the groove structure 301 constitutes a curved surface structure (1011 and 1021) of the first lens unit 101 and the second lens unit 102.
  • the groove structure shown in FIG. 7 requires the thickness of the transparent substrate 30 to be large, so that the weight of the entire grating 01 is increased, and therefore, the first lens unit 101 shown in FIG.
  • the design structure of the second lens unit 102 is more in line with the requirement of the slim design concept of the display device. Therefore, the following embodiments refer to the first lens unit 101 and the second lens unit 102 as the convex structure disposed on the transparent substrate 30. The disclosure is further explained by way of example.
  • the light shielding layer 200 in the present disclosure may be disposed on the light emitting side of the transparent substrate 30 as shown in FIG. 6 , or may be located on the light incident side of the transparent substrate 30 as shown in FIG. 7 , and may be selected according to actual needs. .
  • the grating 01 further includes a reflective layer 40, and the light shielding layer 200 is located on the transparent substrate.
  • the light-emitting side of the reflective layer 40 is located between the transparent substrate 30 and the light-shielding layer 200.
  • the grating 01 when the grating 01 is applied to a liquid crystal type dual-view display device having a backlight module BLU, the light reflected by the reflective layer 40 can enter the backlight module BLU again and pass through the reflection in the backlight module BLU.
  • the reflection of the dot can be re-entered into the grating 01, so that it can be effectively utilized (refer to FIG. 10b in detail), that is, the effective utilization of the light source by the dual-view display device is further improved.
  • the grating 01 further includes a dot 50 on the light incident side of the transparent substrate 30 for scattering the light reflected by the reflective layer 40 to the first lens unit 101 and the The two lens unit 102, for example, the P light in FIG. 8 is reflected by the reflective layer 40 and scattered through the mesh point 50, and can enter the second lens unit 102 for efficient use, thereby further improving the effective utilization of light. .
  • the dot 50 may be formed on a light incident side of the transparent substrate 30 by a separate manufacturing process, or may be integrated with the transparent substrate 30, for example, by injection molding.
  • the method is integrally formed by one production process.
  • the present disclosure preferably adopts an arrangement in which the above-mentioned halftone dots 50 and the transparent substrate 30 are integrated.
  • dots represent dot structures distributed on a transparent substrate that are capable of scattering or reflecting light, and each dot may have a shape such as a protrusion, a depression, or the like.
  • the light ray P1 in Fig. 9a is incident on the side B of the first lens unit 101, where it is reflected into the corresponding left field of view of the second lens unit 102, causing viewing by the viewer in the left field of view.
  • the normal picture is disturbed.
  • the distance from the top edge of the side B of the first lens unit 101 facing the adjacent shading unit 20 (eg, the highest point of the convex surface) to the longitudinal center plane L is greater than the first The distance from the bottom edge of the side of the lens unit to the longitudinal center plane L, that is, the side B of the first lens unit 101 is inclined toward the side away from the longitudinal center plane L, as shown in Fig.
  • some embodiments of the present disclosure may adjust the inclination of the side B to ensure that light incident on the side B is reflected by the side B and enters the first lens unit 101. Corresponding field of view range for efficient use.
  • the side arrangement of the second lens unit 102 may be the same as the side arrangement of the first lens unit 101 described above, that is, the top edge of the side of the second lens unit 102 facing the adjacent shading unit 20 (for example, the highest point of the convex surface)
  • the distance to the longitudinal center plane L is greater than the distance from the bottom edge of the side surface of the second lens unit to the longitudinal center plane L, that is, the side of the second lens unit 102 is inclined away from the side of the longitudinal center plane L so that incidence is made to
  • the light of the side B does not enter the opposite field of view (ie, the field of view corresponding to the first lens unit 101, the right field of view) after being reflected by the side, and enters the field of view of the 0- blind area or the second lens unit 102.
  • embodiments of the present disclosure can adjust the degree of tilt of the side B to ensure that light incident on the side B is reflected by the side B and then enters the second The field of view corresponding to the lens unit 102 is utilized effectively.
  • the liquid crystal display panel 02 in the case of including the liquid crystal display panel 02, for example, the liquid crystal display panel 02 can be divided into a matrix arrangement of red R, green G, and blue B.
  • the dual-view display device further includes a backlight module BLU.
  • the grating 01 can be located on the light-emitting side of the liquid crystal display panel 02 as shown in FIG. 10a.
  • the grating 01 is located in the backlight module.
  • the light requirements for the left field of view and the right field of view in the dual view display device can be satisfied.
  • the grating 01 is disposed on the light-emitting side of the liquid crystal display panel 02 in the above-described FIG. 10a, the light reflected by the reflective layer 40 enters the liquid crystal display panel 02 again, causing interference to the display screen.
  • the grating 01 is disposed between the backlight module BLU and the liquid crystal display panel 02 in the above-mentioned FIG. 10b, on the one hand, the disadvantage that the light reflected by the reflective layer 40 re-enters the liquid crystal display panel 02 to interfere with the display screen is avoided.
  • part of the light reflected by the reflective layer 40 can enter the backlight module BLU, and can be re-entered into the grating 01 through the reflection of the reflective mesh point in the backlight module BLU, so that it can be effectively utilized, that is, further improved.
  • the dual view display device has an effective utilization rate of the light source. Therefore, as an example, the grating 01 is located between the backlight module BLU and the liquid crystal display panel 02.

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Abstract

一种用于双视显示的光栅（01）及双视显示装置。该光栅（01）包括：多个交替分布的透光单元（10）和遮光单元（20）；透光单元（10）包括第一透镜单元（101）和第二透镜单元（102），其中，第一透镜单元（101）被配置为将入射其内的光向第一方向会聚以实现第一视角的图像显示，第二透镜单元（102）被配置为将入射其内的光向第二方向会聚以实现第二视角的图像显示。

Description

用于双视显示的光栅及双视显示装置
交叉引用
本申请要求于2017年7月4日递交中国专利局的、申请号为201710540990.1的中国专利申请的权益，该申请的全部内容以引用方式并入本文。
技术领域
本公开涉及光学领域，尤其涉及一种用于双视显示的光栅及双视显示装置。
背景技术
光栅是一种利用多缝衍射原理使光发生色散的光学元件，随着人们研究的深入，光栅也越来越多的应用于计量、光谱学、光通信、信息处理、显示技术等方面。
例如，光栅可以应用于显示技术中来实现双视显示。在现有技术的双视显示装置中，可以将光栅设置在显示面板的出光侧，在光栅的作用下，位于左侧的观看者在观看时，只能看到偶数(或奇数)像素列，位于右侧的观看者在观看时，只能看到奇数(或偶数)像素列，这样一来，通过在偶数像素列显示第一图像，在奇数像素列显示第二图像，从而能够的左侧和右侧观看者看到不同的图像，实现双视显示的效果。
公开内容
本公开的实施例提供了一种光栅，用于双视显示，包括：多个交替分布的透光单元和遮光单元；所述透光单元包括第一透镜单元和第二透镜单元，其中，所述第一透镜单元被配置为将入射其内的光向第一方向会聚以实现第一视角的图像显示，所述第二透镜单元被配置为将入射其内的光向第二方向会聚以实现第二视角的图像显示。
在一些实施例中，所述第一方向为远离所述透光单元的纵向中心面向所述第一透镜单元所在侧倾斜的方向，所述第二方向为远离所述透光单元的纵向中心面向所述第二透镜单元所在侧倾斜的方向，所述第一透镜单元和所述第二透镜单元分别位于所述透光单元的纵向中心面的两侧。
在一些实施例中，所述透光单元和遮光单元均为条形。
在一些实施例中，同一透光单元中的第一透镜单元和第二透镜单元彼此邻接。
在一些实施例中，所述第一透镜单元和第二透镜单元均由一个或更多个会聚透镜构成。
在一些实施例中，所述会聚透镜为凸透镜。
在一些实施例中，所述第一透镜单元和所述第二透镜单元中的每个透镜单元在远 离所述纵向中心面一侧与一所述遮光单元邻接。
在一些实施例中，所述第一透镜单元和所述第二透镜单元中的每个透镜单元在远离所述纵向中心面一侧与一所述遮光单元交叠。
在一些实施例中，所述光栅还包括用于承载所述第一透镜单元、所述第二透镜单元和所述遮光单元的透明基底。
在一些实施例中，所述第一透镜单元、所述第二透镜单元与所述透明基底为一体结构。
在一些实施例中，所述透明基底上具有凹槽结构，所述凹槽结构的内壁构成所述第一透镜单元和所述第二透镜单元的弧面结构。
在一些实施例中，所述第一透镜单元和所述第二透镜单元由设置于所述透明基底上的凸起结构形成。
在一些实施例中，所述第一透镜单元的朝向相邻的遮光单元的侧面的顶部边缘到所述纵向中心面的距离大于所述第一透镜单元的侧面的底部边缘到所述纵向中心面的距离。
在一些实施例中，所述第二透镜单元的朝向相邻的遮光单元的侧面的顶部边缘到所述纵向中心面的距离大于所述第二透镜单元的侧面的底部边缘到所述纵向中心面的距离。
在一些实施例中，所述遮光单元包括由非透光材料组成的遮光层。
在一些实施例中，所述遮光层位于所述透明基底的出光侧；所述光栅还包括反射层，所述反射层位于所述遮光单元，且设置于所述透明基底与所述遮光层之间。
在一些实施例中，所述光栅还包括网点，所述网点位于所述透明基底的入光侧，用于将经所述反射层反射的光线经该网点散射至所述第一透镜单元和所述第二透镜单元。
在一些实施例中，所述网点与所述透明基底为一体结构。
本公开的实施例还提供了一种双视显示装置，包括如上述任一实施例所述的光栅。
在一实施例中，所述双视显示装置为包括背光模组与液晶显示面板的液晶显示装置，所述光栅位于背光模组与液晶显示面板之间。
附图说明
为了更清楚地说明本公开实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1a为一种双视显示装置的结构示意图；
图2为本公开实施例提供的一种用于双视显示装置的光栅的结构示意图；
图3为图2沿O-O’位置的剖面结构示意图；
图4为本公开实施例提供的另一种光栅的剖面结构示意图；
图5为本公开实施例提供的一种光栅的光路示意图；
图6为本公开实施例提供的一种光栅的结构示意图；
图7为本公开实施例提供的另一种光栅的结构示意图；
图8为本公开实施例提供的再一种光栅的结构示意图；
图9a为本公开实施例提供的一种光栅的光路示意图；
图9b为本公开实施例提供的另一种光栅的光路示意图；
图10a为本公开实施例提供的一种包括光栅的双视显示装置的结构示意图；
图10b为本公开实施例提供的另一种包括光栅的双视显示装置的结构示意图。
附图标记：
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
另外，在下面的详细描述中，为便于解释，阐述了许多具体的细节以提供对本披露实施例的全面理解。然而明显地，一个或更多个实施例在没有这些具体细节的情况下也可以被实施。在其他情况下，公知的结构和装置以图示的方式体现以简化附图。
在发明人应用在先技术时，发现在相关技术中，双视显示装置对光的有效利用率较低。
如图1a所示，为相关技术中一种双视显示的结构示意图，该双视显示装置包括位于该显示面板02出光侧的光栅01，在光栅01的作用下，位于左侧的观看者在观看时，只能看到偶数(或奇数)像素列，位于右侧的观看者在观看时，只能看到奇数(或偶数)像素列，这样一来，通过在偶数像素列显示第一图像P1，在奇数像素列显示第二图像P2，从而能够的左侧和右侧观看者看到不同的图像，实现双视显示的效果。
然而，如图1a所示，对于显示装置中间位置对应的区域，由于第一图像P1和第二图像P2的出射光出现交叠，从而使得该区域(角度θ 盲所对应的区域，以下称为θ 盲区域)观测到的图像为第一图像P1和第二图像P2的交叠图像，也即不能观测到正常的显示图像，只有在该区域的左右两侧的区域(角度θ L和θ R所对应的区域，以下称为θ L和θ R区域)分别能够正常的观测到第一图像P1和第二图像P2。
基于此，对于整个显示装置而言，在光源发光效率一定的情况下，由于位于θ 盲区域中的出射光线无法正常的利用，从而使得位于θ L和θ R区域的有效出射光线的亮度 不足(通常该区域的亮度值小于200nit)，即相关技术中的双视显示装置对光的有效利用率较低。
本公开实施例提供一种用于双视显示的光栅。该光栅可以包括多个交替分布的透光单元10和遮光单元20。所述透光单元10包括第一透镜单元101和第二透镜单元102。所述第一透镜单元101被配置为将入射其内的光向第一方向会聚以实现第一视角的图像显示，所述第二透镜单元102被配置为将入射其内的光向第二方向会聚以实现第二视角的图像显示。
在一实施例中，如图2所示，该光栅01包括：多个条形的透光单元10和条形的遮光单元20，所述透光单元10和遮光单元20交替分布。每个遮光单元20位于相邻的两个透光单元10之间。透光单元10包括分别位于该透光单元10的纵向中心面L两侧、且并排紧邻设置的条形第一透镜单元101和条形第二透镜单元102。如图3所示(图2沿O-O’位置的剖面图)，透过第一透镜单元101和第二透镜单元102的光线分别朝向上述第一方向和第二方向会聚。所述纵向中心面L的延伸方向与透光单元10和遮光单元20是一致的，在图2的实施例中，均为上下方向。纵向中心面L亦可称为宽度方向上的中心面。
作为示例，第一方向可以为远离所述透光单元10的纵向中心面L向所述第一透镜单元101所在侧倾斜的方向(可参见图5和图6中的x方向)，第二方向可以为远离所述透光单元10的纵向中心面L向第二透镜单元102所在侧倾斜的方向(可参见图5和图6中的y方向)。第一透镜单元101和第二透镜单元102分别位于所述透光单元10的纵向中心面L的两侧。至于第一方向和第二方向相对于透光单元10的纵向中心面L的倾斜角度，本领域技术人员可以根据上述第一视角和第二视角的显示需要来选定。
作为示例，同一透光单元10中的第一透镜单元101和第二透镜单元102彼此邻接。
此处需要说明的是，第一，上述第一透镜单元101可以是位于透光单元10的一个条形的透镜(如会聚透镜，诸如凸透镜)，也可以是由位于透光单元10中的多个透镜(如会聚透镜，诸如凸透镜)一起构成的条形透镜，本公开对此不作限制；同理第二透镜单元102与第一透镜单元101的设置方式可以相同，此处不再赘述；以下实施例均是以第一透镜单元101和第二透镜单元102均为位于透光单元10的一个条形的凸透镜为例，对本公开做进一步的说明。本领域技术人员应当理解，本公开的实施例中，会聚透镜不限于凸透镜，其可以为相关技术领域已知的任何具有会聚功能的透镜。
第二，上述第一透镜单元101和第二透镜单元102可以是两个并排紧邻设置的独立结构，也可以是一体式结构，在本公开的实施例中对此不作限定，可以根据实际的需要进行设置。
第三，对于上述沿该透光单元10的纵向中心面L两侧、且并排紧邻设置的条形第一透镜单元101和条形第二透镜单元102，可以如图3所示，第一透镜单元101和第二透镜单元102分别在远离纵向中心面L一侧均与一遮光单元20邻接或者交叠；也可以如图4所示，第一透镜单元101和第二透镜单元102分别在远离纵向中心面L一侧、但与对应的遮光单元20不邻接或者有空隙，本公开对此不作限定，只要能够保证相对于在透光单元10不设置该透镜单元的情况下，能够将原有位于靠近纵向中心面位置θ 盲区域的至少部分出射光线经过透镜的作用，改变出光方向，例如图3中所示，将不设置透镜时的虚线出光方向经透镜的作用改变为实线出光方向(即对于光线A从不设置透镜时的A1出射光改变为A2出射光)，从而能够加以有效利用即可。
当然，对于上述图3和图4的两种设置方式，由于图3的设置方式，一方面，能够最大范围的对θ 盲区域的部分出射光线进行有效利用(可参考图5)，从而最大程度的降低了θ 盲区域的亮度，而增加了左视场和右视场的亮度；另一方面，不仅能够通过调整透光单元10和遮光单元20之间的宽度比来调整θ L区域和θ R区域的出射光线的方向，还能够通过分别调整第一透镜单元101和第二透镜单元102(如凸透镜)的凸面的倾斜程度，对θ L区域和θ R区域的出射光线的方向进一步的非对称或者对称调整(可参考图5)，即能够分别对左视区和右视区的观看位置进行有效调整，因此，作为示例，第一透镜单元101和第二透镜单元102均可以分别在远离纵向中心面L一侧与对应的遮光单元20邻接或者交叠。
综上所述，在相关技术中的双视显示装置中的光栅中，光线直接透过条状缝隙(不设置透镜的透光单元)，导致在靠近纵向中心面区域的光线为交叠的混合光线，从而不能被正常利用；而在本公开的实施例中，第一透镜单元和第二透镜单元，通过透镜的光线的会聚作用，使得原有位于靠近纵向中心面的区域的至少部分光线能够在第一透镜单元和第二透镜单元的作用下分别朝向远离纵向中心面的方向会聚至左视场和右视场，即采用本公开中的光栅的双视显示装置，能够提高对光的有效利用率，以使得左视场和右视场的亮度值增加。
尽管在上述实施例中以条形的透光单元和遮光单元为例对本公开的内容进行介绍，但是，本公开的实施例不限于此，透光单元和遮光单元还可以为条形以外的其他形状，只要能够满足上述双视显示功能即可。
本公开实施例还提供一种双视显示装置，包括上述的光栅，具有与前述实施例提供的光栅相同的结构和有益效果。由于前述实施例已经对光栅的结构和有益效果进行了详细的描述，此处不再赘述。
需要说明的是，在本公开实施例中，双视显示装置具体至少可以包括液晶显示面板和有机发光二极管显示面板，例如，该显示面板可以应用至液晶显示器、液晶电视、手机或平板电脑等任何具有双视显示功能的产品或者部件中。以下结合双视显示装置对本公开中的光栅01做进一步的解释说明。
为了便于上述光栅的加工制作，以及简化光栅在双视显示装置中安装过程，在本公开的实施例中，如图6所示，该光栅01还包括用于承载第一透镜单元101、第二透镜单元102和遮光单元20的透明基底30，其中，遮光单元20一般可以包括由非透光材料(例如主要由黑矩阵材料)组成的遮光层200，以避免光线从该遮光单元20的位置处透过。该遮光层200若采用黑矩阵材料形成则不仅价格便宜，而且制作工艺简单，例如可以采用喷墨打印工艺形成，也可以采用刻蚀工艺形成，本公开对此不作限定，可以根据实际的需要进行选择。
这样一来，一方面，能够在透明基底30上直接制作第一透镜单元101、第二透镜单元102和遮光单元20，并且在制作完成后将光栅01整体安装至双视显示装置中，达到简化制作工艺以及安装的目的；另一方面，可以通过调整透明基底30厚度使得该光栅01能在透明基底30的支撑下，适用于不同尺寸的双视显示装置，例如，对于大尺寸的双视显示装置，可以增加透明基底30的厚度，避免光栅01的中心位置处因重力作用发生变形。
在此基础上，为了进一步的简化工艺，降低制作成本，在本公开的实施例中，上述第一透镜单元101、第二透镜单元102与透明基底30可以为一体结构，例如可以通过注塑工艺的一次成型来制作。以下对该一体结构的具体设置方式做进一步的说明。
例如，可以如图6所示，第一透镜单元101和第二透镜单元102为设置于透明基底30上的凸起结构。
又例如，也可以如图7所示，透明基底30上具有凹槽结构301，凹槽结构301的内壁构成第一透镜单元101和第二透镜单元102的弧面结构(1011和1021)。
相比于上述图6的凸起结构，图7所示的凹槽结构需要透明基底30的厚度较大，从而使得整个光栅01的重量增加，因此，图6所示的第一透镜单元101和第二透镜单元102的设计结构更符合对显示装置的轻薄化设计理念的要求，因此，以下实施例参照第一透镜单元101和第二透镜单元102为设置于透明基底30上的凸起结构的示例，对本公开做进一步的解释说明。
此外，本公开中的遮光层200，如图6所示，可以设置在透明基底30的出光侧；也可以如图7所示，位于透明基底30的入光侧，可以根据实际的需要选择设置。
在此基础上，为进一步的提高包括该光栅01的双视显示装置对光的有效利用率，作为示例，如图8所示，该光栅01还包括反射层40，且遮光层200位于透明基底30的出光侧，反射层40位于遮光单元20，且设置于透明基底30与遮光层200之间。这样一来，在该光栅01应用于具有背光模组BLU的液晶类型的双视显示装置的情况下，经过反射层40反射的光线能够再次进入背光模组BLU，经过背光模组BLU中的反射网点的反射，能够再次进入光栅01，从而可以被加以有效利用(具体可以参考图10b)，即进一步的提高该双视显示装置对光源的有效利用率。
进一步的，如图8所示，该光栅01还包括网点50，网点50位于透明基底30的入光侧，用于将经反射层40反射的光线经该网点散射至第一透镜单元101和第二透镜单元102，例如，图8中的P光线在经过反射层40反射后、并经过网点50的散射，能够进入第二透镜单元102加以有效利用，从而进一步的提高了对光的有效利用率。
需要说明的是，在实际的加工制作中，上述网点50可以是在透明基底30的入光侧，通过单独的制作工艺进行制作；也可以是与透明基底30为一体结构，例如，通过注塑的方式通过一次制作工艺一体成型制作。当然，本公开为了简化制作工艺，优选的，采用上述网点50与透明基底30为一体结构的设置方式。在本公开的实施例中，网点表示分布在透明基底上的能够对光进行散射或反射的点状结构，每个网点可以具有凸起、凹陷等形状。
在此基础上，期望考虑避免部分入射至第一透镜单元101和/或第二透镜单元102的侧面B的光线，在该侧面B反射进入相反视场，从而观看者观看相反视场的正常画面造成干扰，例如，图9a中的光线P1入射至第一透镜单元101的侧面B，在该侧面B反射进入第二透镜单元102对应的左视场，造成位于该左视场的观看者观看的正常画面受到干扰。
基于此，在本公开的一些实施例中，第一透镜单元101的朝向相邻的遮光单元20的侧面B的顶部边缘(例如凸面的最高点)到纵向中心面L的距离大于所述第一透镜单元的侧面的底部边缘到纵向中心面L的距离，即第一透镜单元101的侧面B朝远离纵向中心面L一侧倾斜，如图9b所示，以使得入射至该侧面B的光线经该侧面B反射后不会进入相反视场(即第二透镜单元102所对应的视场，左视场)，而进入θ 盲区域或者第一透镜单元101所对应的视场(右视场)，当然为了充分的提高对光线的有效利用率，本公开的一些实施例可以通过调整该侧面B的倾斜程度以保证入射至该侧面B的光线经该侧面B反射后进入第一透镜单元101所对应的视场范围，从而加以有效利用。
对于第二透镜单元102的侧面设置情况，可以与上述第一透镜单元101的侧面设置情况相同，即第二透镜单元102的朝向相邻的遮光单元20的侧面的顶部边缘(例如凸面的最高点)到纵向中心面L的距离大于所述第二透镜单元的侧面的底部边缘到纵向中心面L的距离，即第二透镜单元102的侧面朝远离纵向中心面L一侧倾斜，以使得入射至该侧面B的光线经该侧面反射后不会进入相反视场(即第一透镜单元101所对应的视场，右视场)，而进入0 盲区域或者第二透镜单元102所对应的视场(左视场)，当然为了充分的提高对光线的有效利用率，本公开的实施例可以通过调整该侧面B的倾斜程度以保证入射至该侧面B的光线经该侧面B反射后进入第二透镜单元102所对应的视场范围，从而加以有效利用。
另外，对于双视显示装置而言，如图10a和图10b所示，在包括液晶显示面板02的情况下，例如，液晶显示面板02可以划分为矩阵排列红色R、绿色G、蓝色B亚像 素，该双视显示装置还包括背光模组BLU，基于此，上述光栅01可以如图10a所示，位于液晶显示面板02的出光侧；也可以如图10b所示，光栅01位于背光模组BLU与液晶显示面板02之间，均能满足双视显示装置中对左视场和右视场的光线需求。
对于上述图10a中将光栅01设置于液晶显示面板02的出光侧的情况下，反射层40反射的光线会再次进入液晶显示面板02，会对显示画面造成干扰。
对于上述图10b中将光栅01设置于背光模组BLU与液晶显示面板02之间的情况下，一方面，避免了经反射层40反射的光线再次进入液晶显示面板02对显示画面造成干扰的弊端；另一方面，经反射层40反射的部分光线能够进入背光模组BLU，经过背光模组BLU中的反射网点的反射，能够再次进入光栅01，从而可以被加以有效利用，即进一步的提高该双视显示装置对光源的有效利用率，因此，作为示例，光栅01位于背光模组BLU与液晶显示面板02之间。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (20)

  1. 一种光栅，用于双视显示，包括：多个交替分布的透光单元和遮光单元；
    所述透光单元包括第一透镜单元和第二透镜单元，
    其中，所述第一透镜单元被配置为将入射其内的光向第一方向会聚以实现第一视角的图像显示，所述第二透镜单元被配置为将入射其内的光向第二方向会聚以实现第二视角的图像显示。
  2. 根据权利要求1所述的光栅，其中，所述第一方向为远离所述透光单元的纵向中心面向所述第一透镜单元所在侧倾斜的方向，所述第二方向为远离所述透光单元的纵向中心面向所述第二透镜单元所在侧倾斜的方向，所述第一透镜单元和所述第二透镜单元分别位于所述透光单元的纵向中心面的两侧。
  3. 根据权利要求1所述的光栅，其中，所述透光单元和遮光单元均为条形。
  4. 根据权利要求1所述的光栅，其中，同一透光单元中的第一透镜单元和第二透镜单元彼此邻接。
  5. 根据权利要求1所述的光栅，其中，所述第一透镜单元和第二透镜单元均由一个或更多个会聚透镜构成。
  6. 根据权利要求5所述的光栅，其中，所述会聚透镜为凸透镜。
  7. 根据权利要求1至6中任一项所述的光栅，其中，所述第一透镜单元和所述第二透镜单元中的每个透镜单元在远离所述纵向中心面一侧与一所述遮光单元邻接。
  8. 根据权利要求1至6中任一项所述的光栅，其中，所述第一透镜单元和所述第二透镜单元中的每个透镜单元在远离所述纵向中心面一侧与一所述遮光单元交叠。
  9. 根据权利要求1至8中任一项所述的光栅，其中，所述光栅还包括用于承载所述第一透镜单元、所述第二透镜单元和所述遮光单元的透明基底。
  10. 根据权利要求9所述的光栅，其中，所述第一透镜单元、所述第二透镜单元与所述透明基底为一体结构。
  11. 根据权利要求10所述的光栅，其中，所述透明基底上具有凹槽结构，所述凹槽结构的内壁构成所述第一透镜单元和所述第二透镜单元的弧面结构。
  12. 根据权利要求10所述的光栅，其中，所述第一透镜单元和所述第二透镜单元由设置于所述透明基底上的凸起结构形成。
  13. 根据权利要求12所述的光栅，其中，所述第一透镜单元的朝向相邻的遮光单元的侧面的顶部边缘到所述纵向中心面的距离大于所述第一透镜单元的侧面的底部边缘到所述纵向中心面的距离。
  14. 根据权利要求12所述的光栅，其中，所述第二透镜单元的朝向相邻的遮光单元的侧面的顶部边缘到所述纵向中心面的距离大于所述第二透镜单元的侧面的底部边 缘到所述纵向中心面的距离。
  15. 根据权利要求1所述的光栅，其中，所述遮光单元包括由非透光材料组成的遮光层。
  16. 根据权利要求15所述的光栅，其中，所述遮光层位于所述透明基底的出光侧；
    所述光栅还包括反射层，所述反射层位于所述遮光单元，且设置于所述透明基底与所述遮光层之间。
  17. 根据权利要求16所述的光栅，其中，所述光栅还包括网点，所述网点位于所述透明基底的入光侧，用于将经所述反射层反射的光线经该网点散射至所述第一透镜单元和所述第二透镜单元。
  18. 根据权利要求17所述的光栅，其中，所述网点与所述透明基底为一体结构。
  19. 一种双视显示装置，包括权利要求1-18中任一项所述的光栅。
  20. 根据权利要求19所述的双视显示装置，其中，所述双视显示装置为包括背光模组与液晶显示面板的液晶显示装置，所述光栅位于背光模组与液晶显示面板之间。
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