WO2020155246A1 - Couche de film optique et dispositif d'affichage - Google Patents

Couche de film optique et dispositif d'affichage Download PDF

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Publication number
WO2020155246A1
WO2020155246A1 PCT/CN2019/076109 CN2019076109W WO2020155246A1 WO 2020155246 A1 WO2020155246 A1 WO 2020155246A1 CN 2019076109 W CN2019076109 W CN 2019076109W WO 2020155246 A1 WO2020155246 A1 WO 2020155246A1
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Prior art keywords
layer
optical axis
optical
substrate
single optical
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PCT/CN2019/076109
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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 WO2020155246A1 publication Critical patent/WO2020155246A1/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
    • G02F1/133528—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

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 first single optical axis optical layer, a plurality of grooves are formed on one side of the first single optical axis optical layer;
  • the second 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 second single-optical axis optical layer The ordinary refractive index of the layer is smaller than the extraordinary refractive index of the first single optical axis optical layer.
  • the width of the convex structure is in the wavelength range of the incident light Inside;
  • the first grating layer is laminated on the side of the second single optical axis optical layer away from the first single optical axis optical layer; or embedded in the second single optical axis optical layer away from the first single optical layer Optical axis on one side of the optical layer.
  • the extraordinary refractive index of the first single optical axis optical layer is 1.0-2.5.
  • the ordinary refractive index of the second single optical axis optical layer is 1.0-2.5.
  • the difference between the extraordinary refractive index of the first single optical axis optical layer and the ordinary refractive index of the second single optical axis optical layer is 0.01-2.
  • the width of the protrusion structure is less than or equal to 1000 nm.
  • the protruding structure is a quadrangular prism structure, and one side of the quadrangular prism is attached to the plate-shaped portion to extend, the extension directions of a plurality of protruding structures are parallel, and two adjacent convex structures Start the structure interval setting.
  • the convex structure is a quadrangular prism 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 first single optical axis optical layer includes nematic liquid crystal molecular material.
  • the material of the second single optical axis optical layer includes nematic liquid crystal molecular material.
  • the first grating layer is laminated on the side of the second single optical axis optical layer away from the first single optical axis optical layer, and the first grating layer includes a transparent substrate and forming 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 a side of the second single optical axis optical layer away from the first single optical axis optical layer, and the first grating layer includes a layer formed on the second 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 50nm-150nm
  • the thickness of each metal layer is 100nm-200nm
  • the distance between two adjacent metal layers is 100nm-200nm.
  • An optical film layer comprising:
  • a first single optical axis optical layer, a plurality of grooves are formed on one side of the first single optical axis optical layer;
  • the second 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 second single-optical axis optical layer The ordinary refractive index of the layer is less than the extraordinary refractive index of the first single optical axis optical layer, and the width of the convex structure is less than or equal to 1000 nm in the arrangement direction of the plurality of convex structures;
  • the first grating layer is laminated on the side of the second single optical axis optical layer away from the first single optical axis optical layer; or embedded in the second single optical axis optical layer away from the first single optical layer On one side of the optical layer of the optical axis;
  • the extraordinary refractive index of the first single optical axis optical layer is 1.0-2.5
  • the ordinary refractive index of the second single optical axis optical layer is 1.0-2.5
  • the first single optical axis optical layer The difference between the extraordinary refractive index of and the ordinary refractive index of the second single-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 disposed on a side of the optical film layer away from the first 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
  • Fig. 3 is a schematic diagram of the refraction effect on the interface perpendicular to the light advancing direction
  • FIG. 4 is a schematic diagram of a three-dimensional structure of a second single optical axis optical layer according to an embodiment
  • FIG. 5 is a schematic diagram of a cross-sectional structure of a second single optical axis optical layer corresponding to FIG. 4;
  • FIG. 6 is a schematic diagram of a three-dimensional structure of a second single optical axis optical layer in another embodiment
  • FIG. 7 is a schematic diagram of a cross-sectional structure of a second 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 first single optical axis optical layer 211, a second single optical axis optical layer 212 and a first grating layer 213.
  • the first grating layer stack 213 is on the side of the second single optical axis optical layer away from the first single optical axis optical layer 211 (see FIG. 1); or is embedded in the second single optical axis optical layer 212 away from the first 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 first single optical axis optical layer 211, and the first single optical axis optical layer 211 has optical anisotropy and has an extraordinary refractive index ne 1 and an ordinary refractive index no 1 .
  • the extraordinary refractive index ne 1 is the equivalent refractive index of the first 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 first single optical axis optical layer 211 when the light polarization direction is parallel to the optical axis
  • birefringence occurs when light passes through the first single optical axis optical layer 211.
  • ne 1 >no 1 that is, the first single optical axis optical layer 211 is a positive single optical axis optical layer.
  • nx 1 is the refractive index of the first single optical axis optical layer 211 in the x direction
  • ny 1 is the refractive index of the first single optical axis optical layer 211 in the y direction
  • nz 1 is the first single optical axis optical layer 211 in the y direction.
  • the extraordinary refractive index ne 1 of the first single optical axis optical layer 211 is 1.0-2.5, and the ordinary refractive index no 1 is 1.0-2.5.
  • the material of the first single optical axis optical layer 211 includes but is not limited to nematic liquid crystal molecular materials.
  • the second single-optical axis optical layer 212 has optical anisotropy, and has an extraordinary refractive index ne 2 and an ordinary refractive index no 2 .
  • the extraordinary refractive index ne 2 is the equivalent refractive index of the second single optical axis optical layer 212 when the light polarization direction is parallel to the optical axis;
  • the ordinary refractive index no 2 is the second single optical axis optical layer 212 when the light polarization direction is parallel to the optical axis.
  • ne 2 >no 2 that is, the second single optical axis optical layer 212 is a positive single optical axis optical layer.
  • nx 2 is the refractive index of the second single optical axis optical layer 212 in the x direction
  • ny 2 is the refractive index of the second single optical axis optical layer 212 in the y direction
  • nz 2 is the second 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 second single optical axis optical layer 212 (perpendicular to the light exit surface of the second single optical axis optical layer 212)
  • the extraordinary refractive index ne 2 of the second single optical axis optical layer 212 is 1.0-2.5, and the ordinary refractive index no 2 is 1.0-2.5.
  • the material of the second single optical axis optical layer 212 includes but is not limited to nematic liquid crystal molecular materials.
  • the ordinary refractive index no 2 of the second single optical axis optical layer 212 is smaller than the extraordinary refractive index ne 1 of the first single optical axis optical layer 211.
  • the difference between the extraordinary refractive index ne 1 of the first single optical axis optical layer 211 and the ordinary refractive index no 2 of the second single optical axis optical layer 212 is 0.01-2.
  • the difference between ne 1 and no 2 is greater, the easier it is to distribute the front-view light energy to a large viewing angle.
  • the optical axis direction in the second single optical axis optical layer 212 is perpendicular to the optical axis direction in the first single optical axis optical layer 211.
  • the ordinary refractive index no 2 of the second single optical axis optical layer 212 is a refractive index in the 0/180 degree direction
  • the extraordinary refractive index ne 2 of the second single optical axis optical layer 212 is 90/270 The refractive index in degree direction
  • the ordinary refractive index no 2 of the second single optical axis optical layer 212 is a refractive index in the direction of 90/270 degrees
  • the extraordinary refractive index ne 2 of the second single optical axis optical layer 212 is 0/180.
  • the refractive index in degree direction 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 first single optical axis optical layer 211.
  • a plurality of grooves are formed on one side of the first single optical axis optical layer 211, and the second single optical axis optical layer 212 includes a plate-shaped portion 2121 and a plate attached to one side of the plate-shaped portion 2121.
  • a plurality of convex structures 2122 matching the shape and size of the groove, and in the arrangement direction of the plurality of convex structures 2122, the width of the convex structure 2122 is within the wavelength range of the incident light.
  • the width of the raised structure 2122 is less than or equal to 1000 nm. In an embodiment, the width of the raised structure 2122 is greater than or equal to 300 nm and less than or equal to 1000 nm.
  • the light incident surface of the convex structure 2122 forms a light-dense to light-sparse grating In the interface, the polarized light is diffracted on the grating interface (see Figure 3), which forms an optical phenomenon with a positive viewing angle light type energy distribution and a large viewing angle.
  • the convex structures are arranged periodically, that is, the diffractive parts constructed by the convex structures are arranged periodically.
  • the protruding structure 2122 is a quadrangular prism structure.
  • the quadrangular prism structure has multiple sides, and one side of the quadrangular prism structure extends from the plate-shaped portion 2121.
  • the extension 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 2rx 1
  • the thickness of the convex structure 2122 is d 1
  • the thickness of the second single-optical axis optical layer 212 is D 1
  • d 1 is not 0, and D 1 ⁇ d 1 .
  • 2rx 1 is within the wavelength range of incident light, more specifically, 2rx 1 is less than or equal to 1000 nm. In one embodiment, 2rx 1 is greater than or equal to 300 nm and less than or equal to 1000 nm.
  • the protruding structure 2122 is a quadrangular 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 thickness of the convex structure 2122 is d 2
  • the thickness of the second single-optical axis optical layer 212 is D 2
  • d 2 is not 0, and D 2 ⁇ d 2 .
  • 2rx 2 and 2ry 2 are both within the wavelength range of incident light, more specifically, 2rx 2 and 2ry 2 are both less than or equal to 1000 nm. In one embodiment, 2rx 2 and 2ry 2 are both greater than or equal to 300 nm, less than or Equal to 1000nm.
  • the first grating layer 213 is laminated on the side of the second single optical axis optical layer 212 away from the first single optical axis optical layer 211; or embedded in the second single optical axis optical layer 212 away from the first single optical axis optical layer 211. 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 second single optical axis optical layer 212 away from the first single optical axis optical layer 211, the first grating layer includes a layer formed on the second 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 second single-optical axis optical layer 212, 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 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 penetrating 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 first single-axis optical layer 211 is ne 1 , and the equivalent refractive index of the horizontally polarized light passing through the second single-axis optical layer 212
  • the refractive index is no 2 , because ne 1 >no 2 , the interface between the first single optical axis optical layer 211 and the second single optical axis optical layer 212 sees horizontally polarized light from the optically dense medium to the optically thinner medium.
  • the effect of diffraction the optical phenomenon of the normal viewing angle light type energy distribution large viewing angle.
  • the extending direction of the metal layers of the first grating layer 213 is parallel to the 0/180 degree direction.
  • the equivalent refractive index of the vertically polarized light passing through the first single optical axis optical layer 211 is ne 1
  • the equivalent of the vertically polarized light passing through the second single optical axis optical layer 212 The refractive index is no 2 , because ne 1 >no 2 , the interface between the first single optical axis optical layer 211 and the second single optical axis optical layer 212 sees that vertically polarized light is emitted from the optically dense medium to the optically thinner medium.
  • the optical film layer provided by this embodiment includes a first single optical axis optical layer 211, a second single optical axis optical layer 212 and a first grating layer 213.
  • the extraordinary refractive index of the first single optical axis optical layer 211 is greater than that of the second
  • the ordinary light refractive index of the single optical axis optical layer 212 when the light passes through the junction surface of the groove and the convex structure, will produce diffraction effect, so that the normal viewing angle light type energy distribution is large viewing angle, and the viewing angle deviation is improved;
  • the layer 213 is laminated on the side of the second single optical axis optical layer 212 away from the first single optical axis optical layer 211, or embedded in the side of the second single optical axis optical layer 212 away from the first single optical axis optical layer 211 Above, natural light can be turned into polarized light, instead of a thicker polarizer. Therefore, the above-mentioned optical film layer can distribute the positive viewing angle light type energy to
  • 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 first 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 first 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 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 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.

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

Abstract

L'invention concerne une couche de film optique (210), comprenant : une première couche optique ayant un axe optique unique (211), plusieurs rainures étant formées sur un côté de celle-ci ; une seconde couche optique ayant un seul axe optique (212) comprenant une partie en forme de plaque (2121) et de multiples structures surélevées (2122) qui sont fixées sur un côté de la partie en forme de plaque (2121) et correspondent aux rainures en termes de forme et de taille, avec un indice de réfraction de lumière ordinaire de la seconde couche optique avec un seul axe optique (212) étant inférieur à un indice de réfraction de lumière extraordinaire de la première couche optique avec un seul axe optique (211), et dans la direction d'alignement des multiples structures en relief (2122), la largeur de la structure en relief (2122) se situant dans la plage de la longueur d'onde de la lumière incidente ; et une première couche de réseau (213), qui est empilée sur un côté, à l'opposé de la première couche optique avec un seul axe optique (211), de la seconde couche optique avec un seul axe optique (212) ou est noyé d'un côté, à l'opposé de la première couche optique avec un seul axe optique (211), de la seconde couche optique avec un seul axe optique (212). L'invention concerne en outre un dispositif d'affichage comprenant la couche de film optique (210).
PCT/CN2019/076109 2019-01-30 2019-02-26 Couche de film optique et dispositif d'affichage WO2020155246A1 (fr)

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CN201910090537.4A CN109613745A (zh) 2019-01-30 2019-01-30 光学膜层显示装置

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110216255A1 (en) * 2010-03-05 2011-09-08 Hitachi Maxell, Ltd. Polarization diffraction grating, method for manufacturing the same, and optical pickup apparatus using the polarization diffraction grating
CN108227276A (zh) * 2017-12-29 2018-06-29 明基材料有限公司 光学膜
CN109164531A (zh) * 2018-09-30 2019-01-08 惠科股份有限公司 偏光结构及显示装置
CN109239968A (zh) * 2018-10-30 2019-01-18 惠科股份有限公司 光学复合膜层、显示面板和显示装置
CN109283747A (zh) * 2018-10-30 2019-01-29 惠科股份有限公司 光学复合膜、显示面板和显示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110216255A1 (en) * 2010-03-05 2011-09-08 Hitachi Maxell, Ltd. Polarization diffraction grating, method for manufacturing the same, and optical pickup apparatus using the polarization diffraction grating
CN108227276A (zh) * 2017-12-29 2018-06-29 明基材料有限公司 光学膜
CN109164531A (zh) * 2018-09-30 2019-01-08 惠科股份有限公司 偏光结构及显示装置
CN109239968A (zh) * 2018-10-30 2019-01-18 惠科股份有限公司 光学复合膜层、显示面板和显示装置
CN109283747A (zh) * 2018-10-30 2019-01-29 惠科股份有限公司 光学复合膜、显示面板和显示装置

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