WO2020155278A1 - Film optique et dispositif d'affichage - Google Patents

Film optique et dispositif d'affichage Download PDF

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Publication number
WO2020155278A1
WO2020155278A1 PCT/CN2019/076543 CN2019076543W WO2020155278A1 WO 2020155278 A1 WO2020155278 A1 WO 2020155278A1 CN 2019076543 W CN2019076543 W CN 2019076543W WO 2020155278 A1 WO2020155278 A1 WO 2020155278A1
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Prior art keywords
layer
substrate
optical axis
optical
refractive index
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PCT/CN2019/076543
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English (en)
Chinese (zh)
Inventor
单剑锋
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惠科股份有限公司
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Publication of WO2020155278A1 publication Critical patent/WO2020155278A1/fr

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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
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • 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
    • G02F1/133528—Polarisers

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 ordinary refractive index of the negative single-optical axis optical layer is 1.0-2.5.
  • the extraordinary refractive index of the positive 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 negative type single optical axis optical layer includes discotic liquid crystal molecules.
  • the material of the positive single optical axis optical layer includes a nematic liquid crystal molecular material.
  • 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 ordinary refractive index of the negative type single optical axis optical layer is 1.0-2.5
  • the extraordinary refractive index of the positive type 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 and a second substrate disposed oppositely;
  • a first grating layer disposed on the first substrate on the side away from the second 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;
  • optical film layer as described above that is disposed between the second grating layer and the second substrate, and the negative single-optical axis optical layer is disposed on the side of the second grating layer;
  • the first grating layer includes a plurality of strip-shaped metal layers formed on the first substrate, and the plurality of metal layers are spaced apart and arranged in parallel.
  • the second grating layer 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 width of the metal layer of the first grating layer is 50nm-150nm
  • the thickness of the metal layer is 100nm-200nm
  • the distance between two adjacent metal layers is 100nm-200nm.
  • the width of the metal layer of the second grating layer is 50nm-150nm
  • the thickness of the metal layer is 100nm-200nm
  • the distance between two adjacent metal layers is 100nm-200nm.
  • the photoresist layer is disposed between the optical film 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 optical film 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 optical film 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 refraction effect on the interface that is not perpendicular to the light advancing direction;
  • FIG. 3 is a schematic diagram of a three-dimensional structure of a positive single-optical axis optical layer in an embodiment
  • FIG. 4 is a schematic diagram of the cross-sectional structure of the positive single-optical axis optical layer corresponding to FIG. 3;
  • FIG. 5 is a schematic diagram of a three-dimensional structure of a positive single optical axis optical layer according to another embodiment
  • FIG. 6 is a schematic diagram of the cross-sectional structure of the positive single-optical axis optical layer corresponding to FIG. 5;
  • FIG. 7 is a schematic structural diagram of a display device according to an embodiment
  • FIG. 8 is a schematic structural diagram of the backlight module of the display device shown in FIG. 7;
  • FIG. 9 is a schematic structural diagram of a display panel of an embodiment of the display device shown in FIG. 7;
  • FIG. 10 is a schematic structural diagram of a display panel of an embodiment of the display device shown in FIG. 7;
  • FIG. 11 is a schematic diagram of the structure of a first grating layer according to an embodiment
  • FIG. 12 is a schematic structural diagram of a display panel corresponding to another embodiment of FIG. 9;
  • FIG. 13 is a schematic structural diagram of a display panel corresponding to another embodiment of FIG. 9;
  • FIG. 14 is a schematic structural diagram of a display panel corresponding to another embodiment of FIG. 9;
  • FIG. 15 is a schematic structural diagram of a display panel corresponding to another embodiment of FIG. 10;
  • FIG. 16 is a schematic structural diagram of a display panel corresponding to another embodiment of FIG. 10;
  • FIG. 17 is a schematic structural diagram of a display panel corresponding to another embodiment of FIG. 10.
  • FIG. 1 is a schematic diagram of the structure of the optical film layer in this embodiment.
  • the optical film layer 250 includes a negative single optical axis optical layer 251 and a positive single optical axis optical layer 252.
  • a plurality of grooves are formed on one side of the negative type single optical axis optical layer 251, and the negative type single optical axis optical layer 251 has optical anisotropy and 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 251 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 251 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 251.
  • nx 1 is the refractive index of the negative single optical axis optical layer 251 in the x direction
  • ny 1 the refractive index of the negative single optical axis optical layer 251 in the y direction
  • nz 1 is the negative single optical axis.
  • the refractive index of the optical axis optical layer 251 in the z direction, the z direction is the extension direction of the film thickness of the negative single optical axis optical layer 251 (perpendicular to the light exit surface of the negative single optical axis optical layer 251)
  • nx 1 ny 1 (no 1 )>nz 1 (ne 1 ).
  • the ordinary refractive index no 1 of the negative single optical axis optical layer is 1.0-2.5.
  • the material of the negative single optical axis optical layer 251 includes, but is not limited to, discotic liquid crystal molecular materials.
  • the positive single-optical axis optical layer 252 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 optical axis optical layer 252 when the light polarization direction is parallel to the optical axis;
  • the ordinary refractive index no 2 is the positive single optical axis optical layer 252 when the light polarization direction is the same
  • the equivalent refractive index perpendicular to the optical axis when light passes through the positive single optical axis optical layer 252, birefringence occurs.
  • nx 2 is the refractive index of the positive single optical axis optical layer 252 in the x direction
  • ny 2 is the refractive index of the positive single optical axis optical layer 252 in the y direction
  • nz 2 is the positive single optical axis
  • the refractive index of the optical axis optical layer 252 in the z direction, the z direction is the extension direction of the film thickness of the positive single optical axis optical layer 252 (perpendicular to the light exit surface of the negative single optical axis optical layer 251)
  • no 2 nz 2 .
  • the extraordinary refractive index ne 2 of the positive single-optical axis optical layer 252 is 1.0-2.5.
  • the material of the positive single optical axis optical layer 252 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 252 is greater than the ordinary refractive index no 1 of the negative single optical axis optical layer 251.
  • the difference between the extraordinary refractive index ne 2 of the positive single optical axis optical layer 252 and the ordinary refractive index no 1 of the negative single optical axis optical layer 251 is 0.01-2.
  • the ordinary refractive index no 2 of the positive single optical axis optical layer 252 is the refractive index in the 0/180 degree direction
  • the extraordinary refractive index ne 2 of the positive single optical axis optical layer 252 is the 90/270 degree direction.
  • the ordinary refractive index no 2 of the positive single optical axis optical layer 252 is the refractive index in the 90/270 degree direction
  • the extraordinary refractive index ne 2 of the positive single optical axis optical layer 252 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 251.
  • a plurality of grooves are formed on one side of the negative type single optical axis optical layer 251, and the positive type single optical axis optical layer 252 includes a plate portion 2521 and a plate attached to one side of the plate portion 2521.
  • a plurality of protruding structures 2522 matching the shape and size of the groove.
  • the convex structure 2522 Since the extraordinary refractive index ne 2 of the positive single optical axis optical layer 252 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 2522 forms a junction that is not perpendicular to the light advancing direction
  • the interface which is not perpendicular to the direction of light travel, produces a refraction effect (see Figure 2), which allows 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 2522 is a triangular prism structure, the triangular prism structure has multiple sides, and one side of the triangular prism structure is extended by the plate-shaped portion 2521, and the extending direction of the multiple protruding structures 2522 In parallel, two adjacent raised structures 2522 are arranged at intervals.
  • the width of the side surface of the plate-shaped portion 2521 is Lx 1
  • the thickness of the convex structure 2522 is d 1
  • the thickness of the positive single-optical axis optical layer 252 is D 1 , d 1 is not 0, and D 1 ⁇ d 1 .
  • the protruding structure 2522 is a triangular pyramid structure, the plurality of protruding structures 2522 are arranged in a two-dimensional matrix array, and two adjacent protruding structures 2522 are arranged at intervals to more effectively integrate The front-view light energy is distributed to the two-dimensional direction, making the full-view viewing more uniform.
  • FIG. 6 Please refer to FIG. 6 together.
  • the width of the side surface of the plate-shaped portion 2521 is Ly 2
  • the distance between the centers of the two adjacent protrusion structures 2522 and the side surface of the plate-shaped portion 2521 is Py 2 , Py 2 ⁇ Ly 2
  • the thickness of the convex structure 2522 is d 2
  • the thickness of the positive single-optical axis optical layer 252 is D 2
  • d 2 is not 0, and D 2 ⁇ d 2 .
  • the optical film layer provided in this embodiment includes a negative single optical axis optical layer 251 and a positive single optical axis optical layer 252.
  • the equivalent refractive index is no 1 .
  • the equivalent refractive index of the positive single optical axis optical layer 252 is ne 2 , and since ne 2 >no 1 , the interface between the positive single optical axis optical layer 252 and the negative single optical axis optical layer 251 sees light.
  • the light-thin medium is projected to the light-dense medium to produce refraction.
  • the optical film layer distributes the energy of the positive viewing angle light type to the optical phenomenon of large viewing angle, and improves the visual role deviation.
  • FIG. 7 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.
  • FIG. 9 and FIG. 10 are schematic diagrams of the structure of the display panel in this embodiment.
  • the display panel 200 includes a first grating layer 210, a first substrate 220, a display layer 230, a second grating layer 240, an optical film layer 250, a photoresist layer 260, and a second substrate 270.
  • the first substrate 220 and the second substrate 270 are disposed oppositely; the first grating layer 210 is disposed on the first substrate 220 on the side away from the second substrate 270; the display layer 230 is disposed between the first substrate 220 and the second substrate 270 The second grating layer 240 is provided between the display layer 230 and the second substrate 270; the optical film layer 250 is provided between the second grating layer 240 and the second substrate 270, wherein the negative single optical axis optical layer is provided The second grating layer 240 side; the photoresist layer 260 is disposed between the optical film layer 250 and the second substrate 270, or between the first substrate 220 and the display layer 230.
  • the display panel 200 includes a first grating layer 210, a first substrate 220, a display layer 230, a second grating layer 240, an optical film layer 250, and a photoresist layer which are sequentially stacked. 260 and a second substrate 270; in another embodiment, referring to FIG. 10, the display panel 200 includes a first grating layer 210, a first substrate 220, a photoresist layer 260, a display layer 230, and a second grating layered in sequence. The layer 240, the optical film layer 250 and the second substrate 270.
  • the first grating layer 210 is disposed on the first substrate 220 away from the second substrate 270, and the first grating layer 210 can convert natural light into polarized light.
  • the thickness of the first grating layer 210 is generally less than 20 ⁇ m.
  • the first grating layer 210 includes a transparent substrate 2101 and a plurality of strip-shaped metal layers 2102 formed on the transparent substrate 2101, and the plurality of metal layers 2102 are arranged in parallel and spaced apart.
  • the transparent substrate 2101 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 2102 includes but is not limited to gold, aluminum, and copper.
  • the metal layer 2102 is formed on the transparent substrate 2101, a plurality of metal layers 2102 are spaced and evenly arranged along a straight line, and the extending directions of the plurality of metal layers 2102 are parallel to each other to form a grating.
  • the width of the metal layer 2102 is 50nm-150nm; the thickness of the metal layer 2102 is 100nm-200nm; the distance between two adjacent metal layers 2102 is 100nm-200nm.
  • the first grating layer 210 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 210 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 210 has the function of absorbing and penetrating polarized light.
  • the arrangement direction of the metal layers of the first grating layer 210 is parallel to the 0/180 degree direction, and the extension direction of the metal layers of the first grating layer 210 is parallel to the 90/270 degree direction, it is expected that horizontally polarized light can pass through the first grating layer 210
  • the arrangement direction of the metal layer of the first grating layer 210 is parallel to the 90/270degree direction
  • the extension direction of the metal layer of the first grating layer 210 is parallel to the 0/180degree direction, and it is expected that vertically polarized light can pass through the first grating layer 210. Therefore, the first grating layer 210 can replace the lower polarizer in the traditional structure (the thickness of a single layer of the traditional polarizer is about 200
  • the first substrate 220 and the second substrate 270 are disposed opposite to each other.
  • the materials of the first substrate 220 and the second substrate 270 are not limited, and specifically, a glass substrate can be selected.
  • the display layer 230 includes a liquid crystal material layer and electrode layers 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 arranged opposite to the first grating layer 210 of the optical film layer 250, that is, the multiple metal layers of the second grating layer 240 correspond to the multiple metal layers of the first grating layer 210.
  • the structure and function of the second grating layer 240 are similar to those of the first grating layer 210, and have the function of absorbing and penetrating polarized light, which can replace the traditional upper polarizer and make the display panel 200 thinner.
  • the interface between the positive single optical axis optical layer 252 and the negative single optical axis optical layer 251 sees that horizontally polarized light is emitted from the optically thin medium to the optically dense medium to produce refraction, making the positive viewing angle light energy Distribute optical phenomena of large viewing angles.
  • the extension direction of the metal layers of the second grating layer 240 is parallel to the 0/180 degree direction. It is expected that vertically polarized light can pass through the second grating layer 240, the equivalent refractive index of the vertically polarized light passing through the negative single optical axis optical layer 251 is no 1 , and the vertically polarized light passing through the positive single optical axis optical layer 252, etc.
  • the effective refractive index is ne 2 , because ne 2 > no 1 , the interface between the positive single optical axis optical layer 252 and the negative single optical axis optical layer 251 sees that the vertically polarized light is emitted from the optically thin medium to the optically dense medium.
  • the effect of refraction is an optical phenomenon that enables the energy of the front viewing angle light type to distribute the large viewing angle.
  • the optical film layer 250 refers to the related description of the previous embodiment, and will not be repeated here.
  • the optical film layer 250 can distribute the positive viewing angle light type energy to a large viewing angle, and improve the viewing angle deviation.
  • the photoresist layer 260 is used to provide hue to the display panel, so that the display panel forms a colorful display image.
  • the photoresist layer 260 may be disposed between the second grating layer 240 and the second substrate 270, 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 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 260 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 250 on the one hand, and solve the problem of the large viewing angle of the display panel 200 without dividing each sub-pixel into a main pixel.
  • both the first grating layer 210 and the second grating layer 240 can turn natural light into polarized light, instead of a thicker polarizing plate, so that 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.

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

Abstract

La présente invention concerne un film optique et un dispositif d'affichage. Le film optique comprend une couche optique d'axe optique unique négatif et une couche optique d'axe optique unique positif. De multiples évidements sont formés sur un côté de la couche optique à axe optique unique négatif ; la couche optique à axe optique unique positif comprend une partie en forme de plaque et de multiples structures en saillie fixées sur un côté de la partie en forme de plaque et correspondant aux évidements en forme et en taille, et l'indice de réfraction de lumière extraordinaire de la couche optique d'axe optique unique positif est supérieur à l'indice de réfraction de lumière ordinaire de la couche optique d'axe optique unique négatif.
PCT/CN2019/076543 2019-01-30 2019-02-28 Film optique et dispositif d'affichage WO2020155278A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910090861.6 2019-01-30
CN201910090861.6A CN109633987A (zh) 2019-01-30 2019-01-30 光学膜层和显示装置

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WO2020155278A1 true WO2020155278A1 (fr) 2020-08-06

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