WO2020155273A1 - 光学膜层和显示装置 - Google Patents

光学膜层和显示装置 Download PDF

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Publication number
WO2020155273A1
WO2020155273A1 PCT/CN2019/076494 CN2019076494W WO2020155273A1 WO 2020155273 A1 WO2020155273 A1 WO 2020155273A1 CN 2019076494 W CN2019076494 W CN 2019076494W WO 2020155273 A1 WO2020155273 A1 WO 2020155273A1
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Prior art keywords
layer
optical axis
optical
substrate
single optical
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PCT/CN2019/076494
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English (en)
French (fr)
Inventor
单剑锋
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惠科股份有限公司
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Publication of WO2020155273A1 publication Critical patent/WO2020155273A1/zh

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    • 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
    • G02F1/133528—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3016—Polarising elements involving passive liquid crystal elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
    • 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
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • 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
    • G02F1/13363—Birefringent elements, e.g. for optical compensation

Definitions

  • This application relates to an optical film layer and a display device.
  • VA-type liquid crystal panels have higher production efficiency and lower production efficiency.
  • the manufacturing cost is advantageous, but in terms of optical properties, compared with IPS liquid crystal panels, there are more obvious defects in optical properties.
  • large-size panels require a larger viewing angle for commercial applications.
  • the VA-type liquid crystal panel drives the brightness of the large viewing angle to quickly saturate with the voltage, which causes the viewing angle image quality contrast and color shift compared to the front view image quality to deteriorate more seriously, resulting in visual role shift.
  • the exemplary VA-type liquid crystal panel has the problem of large viewing angle image quality contrast and color shift compared to the front view image quality, resulting in a problem of viewing role shift.
  • an optical film layer and a display device are provided.
  • An optical film layer comprising:
  • a negative type single optical axis optical layer wherein a plurality of grooves are formed on one side of the negative type single optical axis optical layer;
  • the positive single optical axis optical layer includes a plate-shaped part and a plurality of convex structures that are attached to one side of the plate-shaped part and matched with the shape and size of the groove.
  • the positive single optical axis optical The extraordinary refractive index of the layer is greater than the ordinary refractive index of the negative single optical axis optical layer;
  • the first grating layer is laminated on the side of the positive single optical axis optical layer away from the negative single optical axis optical layer; or embedded in the positive single optical axis optical layer away from the negative single optical layer Optical axis on one side of the optical layer.
  • the extraordinary refractive index of the positive single optical axis optical layer is 1.0-2.5.
  • the ordinary refractive index of the negative single-optical axis optical layer is 1.0-2.5.
  • the difference between the extraordinary refractive index of the positive single optical axis optical layer and the ordinary refractive index of the negative single optical axis optical layer is 0.01-2.
  • the protruding structure is a triangular prism structure, and one side of the triangular prism structure is attached to the plate-shaped portion to extend, the extension directions of a plurality of the protruding structures are parallel, and two adjacent ones The raised structures are arranged at intervals.
  • the convex structure is a triangular pyramid structure, a plurality of the convex structures are arranged in a two-dimensional matrix array, and two adjacent convex structures are arranged at intervals.
  • the material of the positive single optical axis optical layer includes a nematic liquid crystal molecular material.
  • the material of the negative type single optical axis optical layer includes discotic liquid crystal molecules.
  • the first grating layer is laminated on the side of the positive single optical axis optical layer away from the negative single optical axis optical layer, and the first grating layer includes a transparent substrate and is formed on the A plurality of strip-shaped metal layers on the transparent substrate, the plurality of metal layers are spaced apart and arranged in parallel; or
  • the first grating layer is embedded on the side of the positive single optical axis optical layer away from the negative single optical axis optical layer, and the first grating layer includes the positive single optical axis optical layer.
  • a plurality of strip-shaped metal layers on one side of the layer, the plurality of metal layers are spaced apart and arranged in parallel.
  • the width of the metal layer is 50 nm to 150 nm
  • the thickness of the metal layer is 100 nm to 200 nm
  • the distance between two adjacent metal layers is 100 nm to 200 nm.
  • An optical film layer comprising:
  • a negative type single optical axis optical layer wherein a plurality of grooves are formed on one side of the negative type single optical axis optical layer;
  • the positive single optical axis optical layer includes a plate-shaped part and a plurality of convex structures that are attached to one side of the plate-shaped part and matched with the shape and size of the groove.
  • the positive single optical axis optical The extraordinary refractive index of the layer is greater than the ordinary refractive index of the negative single optical axis optical layer;
  • the first grating layer is laminated on the side of the positive single optical axis optical layer away from the negative single optical axis optical layer; or embedded in the positive single optical axis optical layer away from the negative single optical layer On one side of the optical layer of the optical axis;
  • the extraordinary refractive index of the positive single optical axis optical layer is 1.0-2.5;
  • the ordinary refractive index of the negative single optical axis optical layer is 1.0-2.5;
  • the difference between the extraordinary refractive index of the positive single optical axis optical layer and the ordinary refractive index of the negative single optical axis optical layer is 0.01-2.
  • a display device includes:
  • Backlight module used to provide incident light
  • a display panel placed above the backlight module, for receiving the incident light and displaying images
  • the display panel includes:
  • a first substrate arranged on a side of the optical film layer away from the negative single-optical axis optical layer
  • a second substrate arranged opposite to the first substrate
  • a display layer provided between the first substrate and the second substrate
  • a second grating layer arranged between the display layer and the second substrate;
  • the photoresist layer is disposed between the second grating layer and the second substrate, and the display panel further includes:
  • a compensation film layer arranged between the display layer and the second grating layer
  • a compensation film layer arranged between the display layer and the first substrate.
  • the photoresist layer is disposed between the second grating layer and the second substrate, and the display panel further includes:
  • a compensation film layer arranged between the display layer and the second grating layer.
  • the photoresist layer is disposed between the second grating layer and the second substrate, and the display panel further includes:
  • a compensation film layer arranged between the display layer and the first substrate.
  • the photoresist layer is disposed between the first substrate and the display layer; the display panel further includes:
  • a compensation film layer arranged between the display layer and the second grating layer
  • a compensation film layer arranged between the photoresist layer and the first substrate.
  • the photoresist layer is disposed between the first substrate and the display layer; the display panel further includes:
  • a compensation film layer arranged between the display layer and the second grating layer.
  • the photoresist layer is disposed between the first substrate and the display layer; the display panel further includes:
  • a compensation film layer arranged between the photoresist layer and the first substrate.
  • FIG. 1 is a schematic diagram of the structure of an optical film layer according to an embodiment
  • FIG. 2 is a schematic diagram of the structure of an optical film layer according to an embodiment
  • Figure 3 is a schematic diagram of the refraction effect on the interface that is not perpendicular to the direction of light travel;
  • FIG. 4 is a schematic diagram of a three-dimensional structure of a positive single optical axis optical layer according to an embodiment
  • FIG. 5 is a schematic diagram of the cross-sectional structure of the positive single optical axis optical layer corresponding to FIG. 4;
  • FIG. 6 is a schematic diagram of a three-dimensional structure of a positive single-optical axis optical layer in another embodiment
  • FIG. 7 is a schematic diagram of the cross-sectional structure of the positive single optical axis optical layer corresponding to FIG. 6;
  • FIG. 8 is a schematic diagram of the structure of the first grating layer of the optical film layer shown in FIG. 2;
  • FIG. 9 is a schematic structural diagram of a display device according to an embodiment.
  • FIG. 10 is a schematic diagram of the structure of the backlight module of the display device shown in FIG. 9;
  • FIG. 11 is a schematic structural diagram of a display panel of an embodiment of the display device shown in FIG. 9;
  • FIG. 12 is a schematic structural diagram of a display panel of an embodiment of the display device shown in FIG. 9;
  • FIG. 13 is a schematic structural diagram of a display panel corresponding to another embodiment of FIG. 11;
  • FIG. 14 is a schematic structural diagram of a display panel corresponding to another embodiment of FIG. 11;
  • FIG. 15 is a schematic structural diagram of a display panel corresponding to another embodiment of FIG. 11;
  • FIG. 16 is a schematic structural diagram of a display panel corresponding to another embodiment of FIG. 12;
  • FIG. 17 is a schematic structural diagram of a display panel corresponding to another embodiment of FIG. 12;
  • FIG. 18 is a schematic structural diagram of a display panel corresponding to another embodiment of FIG. 12.
  • the optical film layer 210 includes a negative single optical axis optical layer 211, a positive single optical axis optical layer 212 and a first grating layer 213.
  • the first grating layer stack 213 is on the side of the positive type single optical axis optical layer away from the negative type single optical axis optical layer 211 (see FIG. 1); or is embedded in the positive type single optical axis optical layer 212 away from the negative type On one side of the single optical axis optical layer 211 (see FIG. 2).
  • a plurality of grooves are formed on one side of the negative type single optical axis optical layer 211, and the negative type single optical axis optical layer 211 has optical anisotropy, has an extraordinary refractive index ne 1 and an ordinary refractive index no 1 , and ne 1 ⁇ no 1 .
  • the extraordinary refractive index ne 1 is the equivalent refractive index of the negative single optical axis optical layer 211 when the light polarization direction is parallel to the optical axis;
  • the ordinary refractive index no 1 is the negative single optical axis optical layer 211 when the light is polarized
  • the equivalent refractive index whose direction is perpendicular to the optical axis will cause birefringence when light passes through the negative single optical axis optical layer 211.
  • nx 1 is the refractive index of the negative single optical axis optical layer 211 in the x direction
  • ny 1 is the refractive index of the negative single optical axis optical layer 211 in the y direction
  • nz 1 is the negative single optical axis.
  • the refractive index of the optical axis optical layer 211 in the z direction, the z direction is the extension direction of the film thickness of the negative single optical axis optical layer 211 (perpendicular to the light exit surface of the negative single optical axis optical layer 211)
  • nx 1 ny 1 (no 1 )>nz 1 (ne 1 ).
  • the ordinary refractive index no 1 of the negative single-optical axis optical layer 211 is 1.0-2.5.
  • the material of the negative single optical axis optical layer 211 includes but is not limited to disc-shaped liquid crystal molecular materials.
  • the positive single optical axis optical layer 212 has optical anisotropy, has an extraordinary refractive index ne 2 and an ordinary refractive index no 2 , and ne 2 >no 2 .
  • the extraordinary refractive index ne 2 is the equivalent refractive index of the positive single-axis optical layer 212 when the linear polarization direction is parallel to the optical axis;
  • the ordinary refractive index no 2 is the positive single-axis optical layer 212 when the polarization direction of the light is With the equivalent refractive index perpendicular to the optical axis, when light passes through the positive single optical axis optical layer 212, birefringence occurs.
  • nx 2 is the refractive index of the positive single optical axis optical layer 212 in the x direction
  • ny 2 is the refractive index of the positive single optical axis optical layer 212 in the y direction
  • nz 2 is the positive single optical axis
  • the refractive index of the optical axis optical layer 212 in the z direction, the z direction is the extension direction of the film thickness of the positive single optical axis optical layer 212 (perpendicular to the light incident surface of the negative single optical axis optical layer 211)
  • no 2 nz 2 .
  • the extraordinary refractive index ne 2 of the positive single optical axis optical layer 212 is 1.0-2.5.
  • the material of the positive single optical axis optical layer 212 includes but is not limited to nematic liquid crystal molecular materials.
  • the extraordinary refractive index ne 2 of the positive single optical axis optical layer 212 is greater than the ordinary refractive index no 1 of the negative single optical axis optical layer 211.
  • the difference between the extraordinary refractive index ne 2 of the positive single optical axis optical layer 212 and the ordinary refractive index no 1 of the negative single optical axis optical layer 211 is 0.01-2.
  • the optical axis in the positive type single optical axis optical layer 212 is perpendicular to the direction of the optical axis in the negative type single optical axis optical layer 211.
  • the ordinary refractive index no 2 of the positive single optical axis optical layer 212 is the refractive index in the 0/180 degree direction
  • the extraordinary refractive index ne 2 of the positive single optical axis optical layer 212 is the 90/270 degree direction.
  • the ordinary refractive index no 2 of the positive single-optical axis optical layer 212 is the refractive index in the 90/270 degree direction
  • the extraordinary refractive index ne 2 of the positive single-optical axis optical layer 212 is the 0/180 degree direction.
  • the refractive index. wherein, the surface formed by the 0/180 degree direction and the 90/270 degree direction is parallel to the light incident surface of the negative single optical axis optical layer 211.
  • a plurality of grooves are formed on one side of the negative type single optical axis optical layer 211, and the positive type single optical axis optical layer 212 includes a plate-shaped portion 2121 and a plate bonded on one side of the plate-shaped portion 2121.
  • a plurality of protruding structures 2122 matching the shape and size of the groove.
  • the convex structure 2122 Since the extraordinary refractive index ne 2 of the positive single optical axis optical layer 212 is greater than the ordinary refractive index no 1 of the negative single optical axis optical layer, the light incident surface of the convex structure 2122 forms a junction that is not perpendicular to the light advancing direction
  • the interface surface which is not perpendicular to the direction of light travel, produces a refraction effect (see Figure 3), allowing the light to travel to produce angular changes.
  • the convex structures are arranged periodically, that is, the refraction portions constructed by the convex structures are arranged periodically.
  • the protruding structure 2122 is a triangular prism structure, the triangular prism structure has multiple sides, and one side of the triangular prism structure extends in contact with the plate-shaped portion 2121, and the extending direction of the multiple protruding structures 2122 In parallel, two adjacent raised structures 2122 are arranged at intervals.
  • the width of the side surface of the plate-shaped portion 2121 is Lx 1
  • the thickness of the convex structure 2122 is d 1
  • the thickness of the positive single-optical axis optical layer 212 is D 1 , d 1 is not 0, and D 1 ⁇ d 1 .
  • the protruding structure 2122 is a triangular pyramid structure, and the plurality of protruding structures 2122 are arranged in a two-dimensional matrix array, and two adjacent protruding structures 2122 are arranged at intervals to more effectively combine
  • the front-view light energy is distributed to the two-dimensional direction, making the full-view viewing more uniform.
  • FIG. 7 Please refer to FIG. 7 together.
  • the width of the side surface of the plate-shaped portion 2121 is Ly 2
  • the distance between the centers of the two adjacent raised structures 2122 of the side surface of the plate-shaped portion 2121 is Py 2 , Py 2 ⁇ Ly 2
  • the thickness of the convex structure 2122 is d 2
  • the thickness of the positive single-optical axis optical layer 212 is D 2 , d 2 is not 0, and D 2 ⁇ d 2 .
  • the first grating layer 213 is laminated on the side of the positive type single optical axis optical layer 212 away from the negative type single optical axis optical layer 211; or embedded in the positive type single optical axis optical layer 212 away from the negative type On one side of the single optical axis optical layer 211.
  • the first grating layer 213 can convert natural light into polarized light.
  • the thickness of the first grating layer 213 is generally less than 20 ⁇ m.
  • the first grating layer includes a transparent substrate 2131 and is formed on a transparent substrate 2131.
  • the plurality of strip-shaped metal layers 2132 on the substrate 2131 are spaced apart and arranged in parallel.
  • the transparent substrate 2131 includes but is not limited to one of a glass substrate, a silica gel substrate, a silicon dioxide substrate, a silicon nitride substrate, a polymethyl methacrylate substrate, and a polyethylene terephthalate substrate.
  • the metal layer 2132 includes but is not limited to gold, aluminum and copper.
  • the metal layer 2132 is formed on the transparent substrate 2131.
  • the metal layers 2132 are spaced and evenly arranged along a straight line, and the extending directions of the metal layers 2132 are parallel to each other to form a grating.
  • the width of the metal layer 2132 is 50 nm-150 nm; the thickness of the metal layer 2132 is 100 nm-200 nm; and the distance between two adjacent metal layers 2132 is 100 nm-200 nm.
  • the first grating layer 213 when the first grating layer 213 is embedded on the side of the positive single optical axis optical layer 212 away from the negative single optical axis optical layer 211, the first grating layer includes the positive single optical axis optical layer 212.
  • the metal layer includes but is not limited to gold, aluminum, and copper.
  • the metal layer is formed on one side of the positive single-optical axis optical layer 212, a plurality of metal layers are spaced and evenly arranged along a straight line, and the extending directions of the plurality of metal layers are parallel to each other to form a grating.
  • the width of the metal layer is 50nm-150nm; the thickness of the metal layer 2132 is 100nm-200nm; the distance between two adjacent metal layers 2132 is 100nm-200nm.
  • the first grating layer 213 is divided into electromagnetic waves whose vibration direction is perpendicular to the extension direction of the metal layer and electromagnetic waves whose vibration direction is parallel to the extension direction of the metal layer.
  • the first grating layer 213 absorbs or reflects electromagnetic wave vibration components and
  • the electromagnetic wave component parallel to the extension direction of the metal layer only penetrates the electromagnetic wave component perpendicular to the extension direction of the metal layer, and obtains the same effect as the polarizer, passing only the polarized light perpendicular to the extension direction of the polarizer.
  • the light is composed of horizontal polarization (0/180 degree direction of electric field vibration) and vertical polarization (90/270 degree direction of electric field vibration), and the first grating layer 213 has the function of absorbing and transmitting polarized light.
  • the extending direction of the metal layers of the first grating layer 213 is parallel to the 90/270 degree direction.
  • the horizontally polarized light can pass through the first grating layer 213, the equivalent refractive index of the horizontally polarized light passing through the negative single-axis optical layer 211 is no 1 , and the equivalent refractive index of the horizontally polarized light passing the positive single-axis optical layer 212
  • the refractive index is ne 2 , because ne 2 >no 1 , the interface between the positive single optical axis optical layer 212 and the negative single optical axis optical layer 211 sees that horizontally polarized light is emitted from the optically thinner medium to the optically denser medium. It is an optical phenomenon that produces refraction and distributes the energy of the positive viewing angle light type with a large viewing angle.
  • the extending direction of the metal layers of the first grating layer 213 is parallel to the 0/180 degree direction. It is expected that vertically polarized light can pass through the first grating layer 213.
  • the equivalent refractive index of the vertically polarized light passing through the negative single optical axis optical layer 211 is no 1
  • the equivalent of the vertically polarized light passing through the positive single optical axis optical layer 212 The refractive index is ne 2 , since ne 2 > no 1 , the interface between the positive single optical axis optical layer 212 and the negative single optical axis optical layer 211 sees that vertically polarized light is emitted from the optically thinner medium to the optically denser medium. It is an optical phenomenon that produces refraction and distributes the energy of the positive viewing angle light type with a large viewing angle.
  • the optical film layer provided in this embodiment includes a negative single optical axis optical layer, a positive single optical axis optical layer and a first grating layer.
  • the extraordinary refractive index of the positive single optical axis optical layer is greater than that of the negative single optical axis optical layer.
  • the ordinary light refractive index of the layer when the light passes through the interface of the groove and the convex structure, it will produce refraction, so that the normal viewing angle light type energy distribution is large, and the viewing angle is improved;
  • the first grating layer is laminated on the positive type single
  • the optical axis optical layer is on the side away from the negative single optical axis optical layer, or embedded on the side of the positive single optical axis optical layer away from the negative single optical axis optical layer, which can turn natural light into polarized light, and Replace thicker polarizing plates.
  • the above-mentioned optical film layer can not only improve the large viewing angle deviation, but also can turn natural light into polarized light instead of a thicker polarizing plate.
  • FIG. 9 is a schematic structural diagram of the display device in this embodiment.
  • the display device 10 includes a backlight module 100 and a display panel 200.
  • the backlight module 100 provides a collimated light emitting backlight source (collimate light emitting BL), so that the energy of the light is concentrated in the positive viewing angle for output.
  • the backlight module 100 has a highly directional backlight light output, including a reflective sheet 110, a light guide plate 120, a prism film 130, and an LED light source 140, the reflective sheet 110 and the light guide plate 120, and a prism
  • the films 130 are stacked in sequence
  • the light guide plate 120 has a light incident surface 121
  • the LED light source 140 is arranged opposite to the light incident surface 121
  • the light guide plate 120 is provided with a strip-shaped first groove 122 on the side close to the reflective sheet 110.
  • the cross section of 122 is V-shaped, the extending direction of the first groove 122 is perpendicular to the light emitting direction of the LED light source 140, the light guide plate 120 is provided with a strip-shaped second groove 123 on the side close to the prism film 130, and the second groove 123
  • the cross section of the second groove 123 is V-shaped, and the extending direction of the second groove 123 is parallel to the light emitting direction of the LED light source 140.
  • the prism side of the prism film 130 is laminated on the light guide plate 120.
  • FIGS. 11 and 12 are schematic diagrams of the structure of the display panel in this embodiment.
  • the display panel 200 includes an optical film layer 210, a first substrate 220, a display layer 230, a second grating layer 240, a photoresist layer 250, and a second substrate 260.
  • the first substrate 220 is disposed on the side of the optical film layer 210 away from the negative single optical axis optical layer 211; the second substrate 260 is disposed opposite to the first substrate 220; the display layer 230 is disposed on the first substrate 220 and the second substrate 220. Between the two substrates 260; the second grating layer 240 is disposed between the display layer 230 and the second substrate 260; the photoresist layer 250 is disposed between the second grating layer 240 and the second substrate 260, or is disposed on the first substrate Between 220 and the display layer 230.
  • the display panel 200 includes an optical film layer 210, a first substrate 220, a display layer 230, a second grating layer 240, a photoresist layer 250, and a second substrate 260 which are sequentially stacked.
  • the display panel 200 includes an optical film layer 210, a first substrate 220, a photoresist layer 250, a display layer 230, a second grating layer 240, and a second substrate 260 that are sequentially stacked. .
  • the optical film layer 210 refers to the related description of the previous embodiment, which will not be repeated here.
  • the optical film layer 210 can distribute the positive viewing angle light type energy to a large viewing angle, improve the viewing angle deviation, and can also convert natural light into polarized light to replace the polarizing plate and reduce the thickness of the display panel.
  • the first substrate 220 is disposed on the side of the optical film layer 210 away from the negative single optical axis optical layer 211
  • the second substrate 260 is disposed opposite to the first substrate 220
  • the first substrate 220 and the second substrate 260 are
  • the material is not limited, and the glass substrate can be used specifically.
  • the display layer 230 includes a liquid crystal material layer and an electrode layer disposed on the upper and lower surfaces of the liquid crystal material layer, wherein the material of the electrode layer may be indium tin oxide.
  • the second grating layer 240 includes a transparent substrate and a plurality of strip-shaped metal layers formed on the transparent substrate, and the plurality of metal layers are spaced apart and arranged in parallel.
  • the transparent substrate includes but is not limited to one of a glass substrate, a silica gel substrate, a silicon dioxide substrate, a silicon nitride substrate, a polymethyl methacrylate substrate, and a polyethylene terephthalate substrate.
  • the metal layer includes but is not limited to gold, aluminum, and copper. The metal layer is formed on the transparent substrate, and the multiple metal layers are spaced and evenly arranged along a straight line, and the extension directions of the multiple metal layers are parallel to each other to form a grating.
  • the width of the metal layer is 50 nm-150 nm; the thickness of the metal layer is 100 nm-200 nm; and the distance between two adjacent metal layers is 100 nm-200 nm.
  • the second grating layer 240 is disposed opposite to the first grating layer 213 of the optical film layer 210, that is, the multiple metal layers of the second grating layer 240 correspond to the multiple metal layers of the first grating layer 213.
  • the second grating layer 240 has a structure and function similar to that of the first grating layer 213, and has the functions of absorbing and penetrating polarized light.
  • the photoresist layer 250 is used to provide hue to the display panel, so that the display panel forms a colorful display image.
  • the photoresist layer 250 may be disposed between the second grating layer 240 and the second substrate 260, or may also be disposed between the first substrate 220 and the display layer 230.
  • the display panel may further include: a compensation film layer disposed between the display layer 230 and the second grating layer 240; and/or a compensation film layer disposed between the display layer 230 and the first substrate 220.
  • the display panel when the photoresist layer 250 is disposed between the first substrate 220 and the display layer 230, the display panel can also It includes: a compensation film layer disposed between the display layer 230 and the second grating layer 240; and/or a compensation film layer disposed between the photoresist layer 250 and the first substrate 220.
  • the display panel 200 is not limited to the above-mentioned laminated structure, and different layers can be added with materials with special functions according to different requirements. For example, other functional materials are added to a single-function film layer to obtain a multi-functional film layer.
  • the stacking order of the various film layers in the display panel 200 can be changed according to the required functions, and at the same time, other functional film layers and the like can be added as required.
  • the display device 10 provided by this embodiment includes a backlight module 100 with a high directivity backlight output, and a thin display panel 200 with a large viewing angle and improved color shift.
  • the display panel 200 can distribute the light-type energy of the front viewing angle to a large viewing angle through the arrangement of the optical film layer 210, and solve the problem of the large viewing angle of the display panel 200, thereby eliminating the need to divide each sub-pixel into a main pixel.
  • both the first grating layer 213 and the second grating layer 240 can turn natural light into polarized light, instead of a thicker polarizer, and make the display panel 200
  • the thickness is relatively thin, so that the display device 10 has a light and thin volume, a low display color shift rate and a high display efficiency, which can improve the user experience.

Abstract

本申请涉及一种光学膜层和显示装置。光学膜层包括：负型单光轴光学层，所述负型单光轴光学层的一侧上形成有多个凹槽；正型单光轴光学层，包括板状部和贴合在所述板状部一侧上的多个与所述凹槽形状、尺寸相匹配的凸起结构，所述正型单光轴光学层的非常光折射率大于所述负型单光轴光学层的寻常光折射率；第一光栅层，层叠在所述正型单光轴光学层远离所述负型单光轴光学层的一侧上；或内嵌在所述正型单光轴光学层远离所述负型单光轴光学层的一侧上。

Description

光学膜层和显示装置
本申请要求于2019-01-30提交中国专利局，申请号为2019100908423，申请名称为“光学膜层和显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及一种光学膜层和显示装置。
背景技术
这里的陈述仅提供与本申请有关的背景信息，而不必然地构成现有技术。
现行大尺寸液晶显示面板通常采用VA(Vertical Alignment，垂直排列)液晶面板或者IPS(In-Plane Switching，平面转换)液晶面板，VA型液晶面板相较于IPS液晶面板存在较高的生产效率及低制造成本得优势，但光学性质上相较于IPS液晶面板存在较明显得光学性质缺陷，尤其是大尺寸面板在商业应用方面需要较大的视角呈现。例如，VA型液晶面板驱动在大视角亮度随电压快速饱和而造成视角画质对比及色偏相较于正视画质品质恶化严重，产生视角色偏。
因此，范例性的VA型液晶面板存在大视角画质对比及色偏相较于正视画质品质恶化严重，产生视角色偏的问题。
发明内容
根据本申请公开的各种实施例，提供一种光学膜层和显示装置。
一种光学膜层，包括：
负型单光轴光学层，所述负型单光轴光学层的一侧上形成有多个凹槽；
正型单光轴光学层，包括板状部和贴合在所述板状部一侧上的多个与所述凹槽形状、尺寸相匹配的凸起结构，所述正型单光轴光学层的非常光折射率大于所述负型单光轴光学层的寻常光折射率；
第一光栅层，层叠在所述正型单光轴光学层远离所述负型单光轴光学层的一侧上；或 内嵌在所述正型单光轴光学层远离所述负型单光轴光学层的一侧上。
在其中一个实施例中，所述正型单光轴光学层的非常光折射率为1.0-2.5。
在其中一个实施例中，所述负型单光轴光学层的寻常光折射率为1.0-2.5。
在其中一个实施例中，所述正型单光轴光学层的非常光折射率与所述负型单光轴光学层的寻常光折射率之差为0.01-2。
在其中一个实施例中，所述凸起结构为三棱柱结构，且三棱柱结构的一侧面贴合所述板状部延伸，多个所述凸起结构的延伸方向平行，相邻的两个凸起结构间隔设置。
在其中一个实施例中，所述凸起结构为三棱锥结构，多个所述凸起结构呈二维矩阵阵列排布，相邻的两个凸起结构间隔设置。
在其中一个实施例中，所述正型单光轴光学层的材料包括向列相液晶分子材料。
在其中一个实施例中，所述负型单光轴光学层的材料包括碟状液晶分子材料。
在其中一个实施例中，所述第一光栅层层叠在正型单光轴光学层远离所述负型单光轴光学层的一侧上，所述第一光栅层包括透明基板和形成在所述透明基板上的多个条形的金属层，多个所述金属层间隔且平行设置；或者
所述第一光栅层内嵌在所述正型单光轴光学层远离所述负型单光轴光学层的一侧上，所述第一光栅层包括形成在所述正型单光轴光学层一侧上的多个条形的金属层，多个所述金属层间隔且平行设置。
在其中一个实施例中，所述金属层的宽度为50nm-150nm，所述金属层的厚度为100nm-200nm，相邻两个所述金属层的间距为100nm-200nm。
一种光学膜层，包括：
负型单光轴光学层，所述负型单光轴光学层的一侧上形成有多个凹槽；
正型单光轴光学层，包括板状部和贴合在所述板状部一侧上的多个与所述凹槽形状、尺寸相匹配的凸起结构，所述正型单光轴光学层的非常光折射率大于所述负型单光轴光学层的寻常光折射率；
第一光栅层，层叠在所述正型单光轴光学层远离所述负型单光轴光学层的一侧上；或内嵌在所述正型单光轴光学层远离所述负型单光轴光学层的一侧上；
其中，所述正型单光轴光学层的非常光折射率为1.0-2.5；所述负型单光轴光学层的寻 常光折射率为1.0-2.5；
所述正型单光轴光学层的非常光折射率与所述负型单光轴光学层的寻常光折射率之差为0.01-2。
一种显示装置，包括：
背光模组，用于提供入射光；
显示面板，置于所述背光模组上方，用于接收所述入射光并显示画面；
其中，所述显示面板包括：
如上所述的光学膜层；
设置在所述光学膜层远离所述负型单光轴光学层一侧上的第一基板；
与所述第一基板相对设置的第二基板；
设置在所述第一基板与所述第二基板之间的显示层；
设置在所述显示层和所述第二基板之间的第二光栅层；
设置在所述第二光栅层和所述第二基板之间的光阻层，或者设置在所述第一基板和所述显示层之间的光阻层。
在其中一个实施例中，所述光阻层设置在所述第二光栅层和所述第二基板之间，所述显示面板还包括：
设置在所述显示层和所述第二光栅层之间的补偿膜层；以及
设置在所述显示层和所述第一基板之间的补偿膜层。
在其中一个实施例中，所述光阻层设置在所述第二光栅层和所述第二基板之间，所述显示面板还包括：
设置在所述显示层和所述第二光栅层之间的补偿膜层。
在其中一个实施例中，所述光阻层设置在所述第二光栅层和所述第二基板之间，所述显示面板还包括：
设置在所述显示层和所述第一基板之间的补偿膜层。
在其中一个实施例中，所述光阻层设置在所述第一基板和所述显示层之间；所述显示面板还包括：
设置在所述显示层和所述第二光栅层之间的补偿膜层；以及
设置在所述光阻层和所述第一基板之间的补偿膜层。
在其中一个实施例中，所述光阻层设置在所述第一基板和所述显示层之间；所述显示面板还包括：
设置在所述显示层和所述第二光栅层之间的补偿膜层。
在其中一个实施例中，所述光阻层设置在所述第一基板和所述显示层之间；所述显示面板还包括：
设置在所述光阻层和所述第一基板之间的补偿膜层。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其它特征和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例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申请的一些实施例，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它的附图。
图1为一实施方式的光学膜层的结构示意图；
图2为一实施方式的光学膜层的结构示意图；
图3为非与光前进方向垂直的交接面产生折射效应的示意图；
图4为一实施方式的正型单光轴光学层的立体结构示意图；
图5为对应图4的正型单光轴光学层的横截面结构示意图；
图6为另一实施方式的正型单光轴光学层的立体结构示意图；
图7为对应图6的正型单光轴光学层的横截面结构示意图；
图8为图2所示的光学膜层的第一光栅层的结构示意图；
图9为一实施方式的显示装置的结构示意图；
图10为图9所示的显示装置的背光模组的结构示意图；
图11为图9所示的显示装置中一实施例的显示面板的结构示意图；
图12为图9所示的显示装置中一实施例的显示面板的结构示意图；
图13为对应图11另一实施方式的显示面板的结构示意图；
图14为对应图11另一实施方式的显示面板的结构示意图；
图15为对应图11另一实施方式的显示面板的结构示意图；
图16为对应图12另一实施方式的显示面板的结构示意图；
图17为对应图12另一实施方式的显示面板的结构示意图；
图18为对应图12另一实施方式的显示面板的结构示意图。
具体实施方式
为了使本申请的技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
参见图1和图2，图1和图2为本实施例中的光学膜层的结构示意图。
在本实施例中，光学膜层210包括负型单光轴光学层211、正型单光轴光学层212以及第一光栅层213。其中，第一光栅层层叠213在正型单光轴光学层远离负型单光轴光学层211的一侧上(参见图1)；或内嵌在正型单光轴光学层212远离负型单光轴光学层211的一侧上(参见图2)。
其中，负型单光轴光学层211一侧上形成有多个凹槽，负型单光轴光学层211具有光学各向异性，具备非常光折射率ne 1和寻常光折射率no 1，且ne 1＜no 1。其中，非寻常光折射率ne 1为负型单光轴光学层211当光线偏振方向与光轴平行的等效折射率；寻常光折射率no 1为负型单光轴光学层211当光线偏振方向与光轴垂直的等效折射率，当光通过负型单光轴光学层211会产生双折射现象。具体地，建立xyz坐标系，nx 1为负型单光轴光学层211在x方向的折射率，ny 1为负型单光轴光学层211在y方向的折射率，nz 1为负型单光轴光学层211在z方向的折射率，z方向为负型单光轴光学层211的膜厚的延伸方向(垂直于负型单光轴光学层211的出光面)，nx 1＝ny 1(no 1)>nz 1(ne 1)。在一个实施例中，负型单光轴光学层211的寻常光折射率no 1为1.0-2.5。在一个实施例中，负型单光轴光学层211的材料包括但不限于碟状液晶分子材料。
其中，正型单光轴光学层212具有光学各向异性，具备非常光折射率ne 2和寻常光折射率no 2，且ne 2>no 2。非寻常光折射率ne 2为正型单光轴光学层212当线偏振方向与光轴 平行的等效折射率；寻常光折射率no 2为正型单光轴光学层212当光线偏振方向与光轴垂直的等效折射率，当光通过正型单光轴光学层212会产生双折射现象。具体地，建立xyz坐标系，nx 2为正型单光轴光学层212在x方向的折射率，ny 2为正型单光轴光学层212在y方向的折射率，nz 2为正型单光轴光学层212在z方向的折射率，z方向为正型单光轴光学层212的膜厚的延伸方向(垂直于负型单光轴光学层211的入光面)，ne 2＝nx 2>no 2＝ny 2或者ne 2＝ny 2>no 2＝nx 2，no 2＝nz 2。在一个实施例中，正型单光轴光学层212的非常光折射率ne 2为1.0-2.5。在一个实施例中，正型单光轴光学层212的材料包括但不限于向列相液晶分子材料。
具体地，正型单光轴光学层212的非常光折射率ne 2大于负型单光轴光学层211的寻常光折射率no 1。具体地，正型单光轴光学层212的非常光折射率ne 2与负型单光轴光学层211的寻常光折射率no 1之差为0.01-2。当ne 2和no 1之差越大，越容易将正视光能量分配到大视角。更具体地，正型单光轴光学层212中的光轴与负型单光轴光学层211中的光轴方向垂直。在一个实施例中，正型单光轴光学层212的寻常光折射率no 2为0/180degree方向的折射率，正型单光轴光学层212的非常光折射率ne 2为90/270degree方向的折射率。在一个实施例中，正型单光轴光学层212的寻常光折射率no 2为90/270degree方向的折射率，正型单光轴光学层212的非常光折射率ne 2为0/180degree方向的折射率。其中，0/180degree方向和90/270degree方向构成的面平行于负型单光轴光学层211的入光面。
在本实施例中，负型单光轴光学层211的一侧上形成有多个凹槽，正型单光轴光学层212包括板状部2121和贴合在板状部2121一侧上的多个与凹槽形状、尺寸相匹配的凸起结构2122。由于正型单光轴光学层212的非常光折射率ne 2大于负型单光轴光学层的寻常光折射率no 1，因此凸起结构2122的入光面形成非与光前进方向垂直的交接面，该非与光前进方向垂直的交接面产生折射效应(参见图3)，让光行进产生角度变化。具体地，凸起结构呈周期性排列，即由凸起结构构建的折射部呈周期性排列。
在一个实施例中，参见图4，凸起结构2122为三棱柱结构，三棱柱结构具有多个侧面，且三棱柱结构的一侧面贴合板状部2121延伸，多个凸起结构2122的延伸方向平行，相邻的两个凸起结构2122间隔设置。具体地，请一并参见图5，贴合板状部2121的侧面的宽度为Lx 1，相邻的两个凸起结构2122贴合板状部2121的侧面的中心之间的距离为Px 1， Px 1≥Lx 1，当Px 1＝Lx 1时，相邻的两个凸起结构贴合设置。凸起结构2122的厚度为d 1，正型单光轴光学层212的厚度为D 1，d 1不为0，且D 1≥d 1。
在一个实施例中，参见图6，凸起结构2122为三棱锥结构，多个凸起结构2122呈二维矩阵阵列排布，相邻的两个凸起结构2122间隔设置，以更有效的将正视角光能量分配到二维方向，使得全视角观赏更加均匀。具体地，请一并参见图7，在x方向上，贴合板状部2121的侧面的宽度为Lx 2，相邻的两个凸起结构2122贴合板状部2121的侧面的中心之间的距离为Px 2，Px 2≥Lx 2，当Px 2＝Lx 2时，相邻的两个凸起结构在x方向上贴合设置。在y方向上，贴合板状部2121的侧面的宽度为Ly 2，相邻的两个凸起结构2122贴合板状部2121的侧面的中心之间的距离为Py 2，Py 2≥Ly 2，当Py 2＝Ly 2时，相邻的两个凸起结构在y方向上贴合设置。凸起结构2122的厚度为d 2，正型单光轴光学层212的厚度为D 2，d 2不为0，且D 2≥d 2。
在本实施例中，第一光栅层213层叠在正型单光轴光学层212远离负型单光轴光学层211的一侧上；或内嵌在正型单光轴光学层212远离负型单光轴光学层211的一侧上。第一光栅层213能够将自然光变成偏振光。其中，第一光栅层213的厚度一般小于20μm。
具体地，当第一光栅层213层叠在正型单光轴光学层212远离负型单光轴光学层211的一侧上时，参见图8，第一光栅层包括透明基板2131和形成在透明基板2131上的多个条形的金属层2132，多个金属层2132间隔且平行设置。透明基板2131包括但不限于玻璃基板、硅胶基板、二氧化硅基板、氮化硅基板、聚甲基丙烯酸甲酯基板及聚对苯二甲酸乙二酯基板中的一种。金属层2132包括但不限于金、铝及铜。金属层2132形成在透明基板2131上，多个金属层2132沿一直线间隔并均匀排布，且多个金属层2132的延伸方向相互平行，而形成光栅。可选的，金属层2132的宽度为50nm-150nm；金属层2132的厚度为100nm-200nm；相邻的两个金属层2132的间距为100nm-200nm。
具体地，当第一光栅层213内嵌在正型单光轴光学层212远离负型单光轴光学层211的一侧上时，第一光栅层包括形成在正型单光轴光学层212一侧上的多个条形的金属层，多个金属层间隔且平行设置。金属层包括但不限于金、铝及铜。金属层形成在正型单光轴光学层212一侧上，多个金属层沿一直线间隔并均匀排布，且多个金属层的延伸方向相互平行，而形成光栅。可选的，金属层的宽度为50nm-150nm；金属层2132的厚度为 100nm-200nm；相邻的两个金属层2132的间距为100nm-200nm。
在本实施例中，第一光栅层213分为振动方向与金属层的延伸方向垂直的电磁波及振动方向与金属层的延伸方向平行的电磁波，第一光栅层213会吸收或者反射电磁波振动分量与金属层延伸方向平行的电磁波分量，只有电磁波振动分量与金属层延伸方向垂直的电磁波分量穿透，获得与偏光板相同的作用，仅通过垂直于偏光板拉伸方向的偏振光。
具体地，光由水平偏振(电场振动方向0/180degree方向)及垂直偏振(电场振动方向90/270degree方向)构成，第一光栅层213对于偏振光具备吸收跟穿透的作用。
当第一光栅层213的金属层的排布方向平行于0/180degree方向时，第一光栅层213的金属层的延伸方向平行于90/270degree方向。预计水平偏振光可以通过第一光栅层213，该水平偏振光通过负型单光轴光学层211的等效折射率为no 1，该水平偏振光通过正型单光轴光学层212的等效折射率为ne 2，由于ne 2＞no 1，正型单光轴光学层212和负型单光轴光学层211的交接面看到的是水平偏振光由光疏介质射向光密介质而产生折射的作用，使正视角光型能量分配大视角的光学现象。
当第一光栅层213的金属层的排布方向平行于90/270degree方向时，第一光栅层213的金属层的延伸方向平行于0/180degree方向。预计垂直偏振光可以通过第一光栅层213，该垂直偏振光通过负型单光轴光学层211的等效折射率为no 1，该垂直偏振光通过正型单光轴光学层212的等效折射率为ne 2，由于ne 2＞no 1，正型单光轴光学层212和负型单光轴光学层211的交接面看到的是垂直偏振光由光疏介质射向光密介质而产生折射的作用，使正视角光型能量分配大视角的光学现象。
本实施例提供的光学膜层，包括负型单光轴光学层、正型单光轴光学层及第一光栅层，正型单光轴光学层的非常光折射率大于负型单光轴光学层的寻常光折射率，光从凹槽和凸起结构的交接面通过时将产生折射作用，以使正视角光型能量分配大视角，改善视角色偏；第一光栅层层叠在正型单光轴光学层远离负型单光轴光学层的一侧上，或内嵌在正型单光轴光学层远离负型单光轴光学层的一侧上，能够使自然光变成偏振光，而替代厚度较厚的偏光板。由此，上述光学膜层不仅能够改善大视角色偏，而且还能够使自然光变成偏振光，而替代厚度较厚的偏光板。
参见图9，图9为本实施例中的显示装置的结构示意图。
在本实施例中，显示装置10包括背光模组100和显示面板200。其中，背光模组100提供准直出光背光光源(collimate light emitting BL)，以使光的能量集中在正视角输出。
在本实施例中，参见图10，背光模组100具有指向性高的背光光型输出，包括反射片110、导光板120、棱镜膜130及LED光源140，反射片110与导光板120、棱镜膜130依次层叠，导光板120具有入光面121，LED光源140与入光面121相对设置，导光板120靠近反射片110的一侧开设有条形的第一凹槽122，第一凹槽122的截面呈V形，第一凹槽122的延伸方向与LED光源140的出光方向垂直，导光板120靠近棱镜膜130的一侧开设有条形的第二凹槽123，第二凹槽123的截面呈V形，第二凹槽123的延伸方向与LED光源140的出光方向平行。可选的，棱镜膜130的棱镜一侧层叠在导光板120上。
在本实施例中，参见图11和图12，图11和图12为本实施例中的显示面板的结构示意图。
本实施例中，显示面板200包括光学膜层210、第一基板220、显示层230、第二光栅层240、光阻层250以及第二基板260。
具体地，第一基板220设置在光学膜层210远离负型单光轴光学层211的一侧上；第二基板260与第一基板220相对设置；显示层230设置在第一基板220与第二基板260之间的；第二光栅层240设置在显示层230和第二基板260之间；光阻层250设置在第二光栅层240和第二基板260之间，或者设置在第一基板220和显示层230之间。
即，在一实施例中，参见图11，显示面板200包括依次叠层设置的光学膜层210、第一基板220、显示层230、第二光栅层240、光阻层250以及第二基板260；在另一个实施例中，参见图12，显示面板200包括依次叠层设置的光学膜层210、第一基板220、光阻层250、显示层230、第二光栅层240以及第二基板260。
本实施例中，光学膜层210参见上一实施例的相关描述，在此不再赘述。光学膜层210能够将正视角光型能量分配大视角，改善视角色偏，而且还能够将自然光变成偏振光，以取代偏光板，薄化显示面板的厚度。
本实施例中，第一基板220设置在光学膜层210远离负型单光轴光学层211一侧上，第二基板260与第一基板220相对设置，第一基板220和第二基板260的材料不做限制，具体可以选用玻璃基板。显示层230包括液晶材料层和设置在液晶材料层上下表面上的电 极层，其中，电极层的材料可选为氧化铟锡。
本实施例中，第二光栅层240包括透明基板和形成在透明基板上的多个条形的金属层，多个金属层间隔且平行设置。透明基板包括但不限于玻璃基板、硅胶基板、二氧化硅基板、氮化硅基板、聚甲基丙烯酸甲酯基板及聚对苯二甲酸乙二酯基板中的一种。金属层包括但不限于金、铝及铜。金属层形成在透明基板上，多个金属层沿一直线间隔并均匀排布，且多个金属层的延伸方向相互平行，而形成光栅。可选的，金属层的宽度为50nm-150nm；金属层的厚度为100nm-200nm；相邻的两个金属层的间距为100nm-200nm。可选的，第二光栅层240与光学膜层210的第一光栅层213相对设置，即第二光栅层240的多个金属层与第一光栅层213的多个金属层相对应。第二光栅层240与第一光栅层213的结构和功能相似，对于偏振光具备吸收跟穿透的作用。
本实施例中，光阻层250用于为显示面板提供色相，使显示面板形成彩色的显示画面。光阻层250可以设置在第二光栅层240和第二基板260之间，或者也可以设置在第一基板220和显示层230之间。
请一并参见图13-图15(图中网格层为补偿膜层)，在一个实施例中，当光阻层250设置在第二光栅层240和第二基板260之间时，显示面板还可以包括：设置在显示层230和第二光栅层240之间的补偿膜层；和/或设置在显示层230和第一基板220之间的补偿膜层。
请一并参见图16-图18(图中网格层为补偿膜层)，在一个实施例中，当光阻层250设置在第一基板220和显示层230之间时，显示面板还可以包括：设置在显示层230和第二光栅层240之间的补偿膜层；和/或设置在光阻层250和第一基板220之间的补偿膜层。
需要说明的是，显示面板200不限于上述层叠结构，不同层可以根据不同需求增加特殊功能的材料，例如，在单功能膜层中增加其他功能材料，而得到多功能膜层。另外，显示面板200中各个膜层的层叠顺序可以根据所需要的功能进行改变，同时，还可以根据需要加入其他功能膜层等等。
本实施例提供的显示装置10，包括指向性高的背光光型输出的背光模组100，以及具有大视角且色偏得到改善、薄型化的显示面板200。其中，显示面板200一方面通过光学膜层210的设置，能将正视角的光型能量分配到大视角，解决显示面板200的大视角色偏 问题，从而不需要将各子像素划分为主像素及次像素结构，避免了再设计金属走线或薄膜晶体管元件来驱动次像素以及可透光开口区牺牲，从而具有高的面板透率，增加了出光能量，可以达到节能的效益，同时维持了显示面板200的显示解析度和驱动频率；另一方面，第一光栅层213和第二光栅层240均能够使自然光变成偏振光，而替代厚度较厚的偏光板，而使显示面板200的厚度较薄，从而显示装置10体积轻薄、显示色偏率低且具有高的显示效率，能够提高用户的体验度。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (18)

  1. 一种光学膜层，包括：
    负型单光轴光学层，所述负型单光轴光学层的一侧上形成有多个凹槽；
    正型单光轴光学层，包括板状部和贴合在所述板状部一侧上的多个与所述凹槽形状、尺寸相匹配的凸起结构，所述正型单光轴光学层的非常光折射率大于所述负型单光轴光学层的寻常光折射率；
    第一光栅层，层叠在所述正型单光轴光学层远离所述负型单光轴光学层的一侧上；或内嵌在所述正型单光轴光学层远离所述负型单光轴光学层的一侧上。
  2. 根据权利要求1所述的光学膜层，其中，所述正型单光轴光学层的非常光折射率为1.0-2.5。
  3. 根据权利要求1所述的光学膜层，其中，所述负型单光轴光学层的寻常光折射率为1.0-2.5。
  4. 根据权利要求1所述的光学膜层，其中，所述正型单光轴光学层的非常光折射率与所述负型单光轴光学层的寻常光折射率之差为0.01-2。
  5. 根据权利要求1所述的光学膜层，其中，所述凸起结构为三棱柱结构，且三棱柱结构的一侧面贴合所述板状部延伸，多个所述凸起结构的延伸方向平行，相邻的两个凸起结构间隔设置。
  6. 根据权利要求1所述的光学膜层，其中，所述凸起结构为三棱锥结构，多个所述凸起结构呈二维矩阵阵列排布，相邻的两个凸起结构间隔设置。
  7. 根据权利要求1所述的光学膜层，其中，所述正型单光轴光学层的材料包括向列相液晶分子材料。
  8. 根据权利要求1所述的光学膜层，其中，所述负型单光轴光学层的材料包括碟状液晶分子材料。
  9. 根据权利要求1所述的光学膜层，其中，所述第一光栅层层叠在正型单光轴光学层远离所述负型单光轴光学层的一侧上，所述第一光栅层包括透明基板和形成在所述透明基板上的多个条形的金属层，多个所述金属层间隔且平行设置；或者
    所述第一光栅层内嵌在所述正型单光轴光学层远离所述负型单光轴光学层的一侧上， 所述第一光栅层包括形成在所述正型单光轴光学层一侧上的多个条形的金属层，多个所述金属层间隔且平行设置。
  10. 根据权利要求9所述的光学复合膜层，其中，所述金属层的宽度为50nm-150nm，所述金属层的厚度为100nm-200nm，相邻两个所述金属层的间距为100nm-200nm。
  11. 一种光学膜层，包括：
    负型单光轴光学层，所述负型单光轴光学层的一侧上形成有多个凹槽；
    正型单光轴光学层，包括板状部和贴合在所述板状部一侧上的多个与所述凹槽形状、尺寸相匹配的凸起结构，所述正型单光轴光学层的非常光折射率大于所述负型单光轴光学层的寻常光折射率；
    第一光栅层，层叠在所述正型单光轴光学层远离所述负型单光轴光学层的一侧上；或内嵌在所述正型单光轴光学层远离所述负型单光轴光学层的一侧上；
    其中，所述正型单光轴光学层的非常光折射率为1.0-2.5；所述负型单光轴光学层的寻常光折射率为1.0-2.5；
    所述正型单光轴光学层的非常光折射率与所述负型单光轴光学层的寻常光折射率之差为0.01-2。
  12. 一种显示装置，包括：
    背光模组，用于提供入射光；
    显示面板，置于所述背光模组上方，用于接收所述入射光并显示画面；
    其中，所述显示面板包括：
    如权利要求1所述的光学膜层；
    设置在所述光学膜层远离所述负型单光轴光学层一侧上的第一基板；
    与所述第一基板相对设置的第二基板；
    设置在所述第一基板与所述第二基板之间的显示层；
    设置在所述显示层和所述第二基板之间的第二光栅层；
    设置在所述第二光栅层和所述第二基板之间的光阻层，或者设置在所述第一基板和所述显示层之间的光阻层。
  13. 根据权利要求12所述的显示装置，其中，所述光阻层设置在所述第二光栅层和 所述第二基板之间，所述显示面板还包括：
    设置在所述显示层和所述第二光栅层之间的补偿膜层；以及
    设置在所述显示层和所述第一基板之间的补偿膜层。
  14. 根据权利要求12所述的显示装置，其中，所述光阻层设置在所述第二光栅层和所述第二基板之间，所述显示面板还包括：
    设置在所述显示层和所述第二光栅层之间的补偿膜层。
  15. 根据权利要求12所述的显示装置，其中，所述光阻层设置在所述第二光栅层和所述第二基板之间，所述显示面板还包括：
    设置在所述显示层和所述第一基板之间的补偿膜层。
  16. 根据权利要求12所述的显示装置，其中，所述光阻层设置在所述第一基板和所述显示层之间；所述显示面板还包括：
    设置在所述显示层和所述第二光栅层之间的补偿膜层；以及
    设置在所述光阻层和所述第一基板之间的补偿膜层。
  17. 根据权利要求12所述的显示装置，其中，所述光阻层设置在所述第一基板和所述显示层之间；所述显示面板还包括：
    设置在所述显示层和所述第二光栅层之间的补偿膜层。
  18. 根据权利要求12所述的显示装置，其中，所述光阻层设置在所述第一基板和所述显示层之间；所述显示面板还包括：
    设置在所述光阻层和所述第一基板之间的补偿膜层。
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