WO2023019674A1 - 光学膜片和显示装置 - Google Patents

光学膜片和显示装置 Download PDF

Info

Publication number
WO2023019674A1
WO2023019674A1 PCT/CN2021/119121 CN2021119121W WO2023019674A1 WO 2023019674 A1 WO2023019674 A1 WO 2023019674A1 CN 2021119121 W CN2021119121 W CN 2021119121W WO 2023019674 A1 WO2023019674 A1 WO 2023019674A1
Authority
WO
WIPO (PCT)
Prior art keywords
inclined surface
plane
symmetry
central plane
substrate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/119121
Other languages
English (en)
French (fr)
Inventor
殷志远
陈黎暄
徐鸣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to US17/607,470 priority Critical patent/US12197065B2/en
Publication of WO2023019674A1 publication Critical patent/WO2023019674A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0215—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having a regular structure
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1323—Arrangements for providing a switchable viewing angle
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133526—Lenses, e.g. microlenses or Fresnel lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • 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
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/302—Details of OLEDs of OLED structures
    • H10K2102/3023—Direction of light emission
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/873—Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/879—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses

Definitions

  • the present application relates to the field of display technology, in particular to an optical film and a display device.
  • Improving panel size and resolution is the liquid crystal display (Liquid Crystal Display, LCD) and organic light-emitting diode (Organic light-emitting diode)
  • LCD liquid crystal display
  • Organic light-emitting diode Organic light-emitting diode
  • OLED Light-emitting Diode
  • the industry usually adopts external optical solutions to improve the large viewing angle performance of the display.
  • one of the most common ways is to add viewing angle improving films with different optical microstructures on the display to achieve the purpose of improving the large viewing angle performance of the display.
  • the microstructure shapes of the viewing angle improving films on the market are relatively single and regular, which can only improve the angle of the emitted light in a large range, but cannot achieve the angle of the emitted light in a small range. Fine regulation.
  • the purpose of the present application is to provide an optical film and a display device capable of finely adjusting the angle of outgoing light.
  • the present application provides an optical film, which includes a base material and a protrusion disposed on the surface of the base material, the protrusion comprising:
  • first inclined surface connected to the central plane, the first inclined surface is away from the surface of the substrate along a direction away from the central plane;
  • the second inclined surface is connected between the first inclined surface and the surface of the substrate, and the second inclined surface is located on the side of the first inclined surface away from the central plane, the second inclined surface The inclined surface is close to the surface of the base material in a direction away from the central plane.
  • the convex portion further includes a first connecting surface, the first connecting surface is connected between the first inclined surface and the second inclined surface, and the first connecting surface is parallel to the surface of the substrate.
  • the convex portion further includes a first sub-connection surface and a second sub-connection surface, and the first sub-connection surface and the second sub-connection surface are connected between the first inclined surface and the second sub-connection surface. between the second inclined surfaces,
  • the first sub-connection surface is connected between the first inclined surface and the second connection surface, the first sub-connection surface is inclined relative to the surface of the base material, and the first sub-connection surface is along a direction away from the central plane away from the surface of the substrate;
  • the second sub-connection surface is connected between the first sub-connection surface and the second inclined surface, the second sub-connection surface is inclined relative to the surface of the base material, and the second sub-connection surface is along approaching the surface of the substrate in a direction away from the central plane.
  • the convex portion further has a third inclined surface and a fourth inclined surface, wherein,
  • the third inclined surface is connected to the central plane, and the third inclined surface is away from the surface of the substrate along a direction away from the central plane;
  • the fourth inclined surface is connected between the third inclined surface and the surface of the substrate, and the fourth inclined surface is located on a side of the third inclined surface away from the central plane, and the first inclined surface
  • the four inclined planes are close to the surface of the base material along the direction away from the central plane.
  • the convex portion has a plane of symmetry
  • the central plane is symmetrical to the plane of symmetry
  • the third inclined plane and the first inclined plane are symmetrical to the plane of symmetry
  • the fourth inclined plane is symmetrical to the plane of symmetry.
  • the inclined surface is symmetrical to the second inclined surface with respect to the symmetry plane.
  • the raised portion further includes:
  • the fifth inclined surface is connected with the central plane and connected between the first inclined surface and the third inclined surface, and the fifth inclined surface is away from the base along the direction away from the central plane. the surface of the material;
  • the sixth inclined surface is connected between the fifth inclined surface and the surface of the substrate, and is connected between the second inclined surface and the fourth inclined surface, and the sixth inclined surface is located at the The fifth inclined surface is away from the side of the central plane, and the sixth inclined surface is close to the surface of the substrate along the direction away from the central plane;
  • the seventh inclined surface is connected to the central plane and is connected between the first inclined surface and the third inclined surface, and the seventh inclined surface is away from the substrate along a direction away from the central plane s surface;
  • the eighth inclined surface is connected between the seventh inclined surface and the surface of the substrate, and is connected between the second inclined surface and the fourth inclined surface, and the eighth inclined surface is located on the The seventh inclined surface is away from the side of the central plane, and the eighth inclined surface is close to the surface of the base material along a direction away from the central plane.
  • the protrusion has a first plane of symmetry and a second plane of symmetry, the first plane of symmetry is perpendicular to the second plane of symmetry, and the center planes are respectively opposite to the first plane of symmetry symmetrical to the second plane of symmetry, the third inclined plane is symmetrical to the first inclined plane relative to the first plane of symmetry, and the fourth inclined plane is symmetrical to the second inclined plane relative to the first The plane is symmetrical, the seventh inclined surface is symmetrical to the fifth inclined surface relative to the second symmetrical plane, and the eighth inclined surface is symmetrical to the sixth inclined surface relative to the second symmetrical plane.
  • the convex portion is a prism with a groove
  • the groove is a prism with an inverted trapezoidal cross section
  • the bottom surface of the groove is the central plane
  • the bottom surface of the groove is the central plane.
  • One side is the first inclined surface
  • one outer side of the prism is the second inclined surface.
  • the protrusion is a prism with a groove
  • the top surface of the protrusion is the central plane
  • one side wall of the groove is the first inclined surface
  • the optical film further includes a planarization layer, the refractive index of the planarization layer is greater than the refractive index of the substrate and the convex portion, and the refractive index of the convex portion is greater than or equal to The refractive index of the substrate.
  • the present application also provides a display device, which includes the above-described optical film and a display panel, and the optical film is disposed on the light-emitting side of the display panel.
  • the display panel is a liquid crystal display panel
  • the display device further includes an upper polarizer on the light emitting side of the liquid crystal display panel, the upper polarizer serves as the base material, and the convex The part is arranged on the upper polarizer, and the light emitting side of the optical film is also provided with an anti-reflection film.
  • the display panel is an organic light emitting diode display panel
  • the organic light emitting diode display panel includes an encapsulation layer
  • the encapsulation layer includes a first encapsulation layer and a second encapsulation layer disposed on the first encapsulation layer.
  • Two encapsulation layers, the base material of the optical film is the first encapsulation layer, and the protrusion is the second encapsulation layer.
  • the optical film of the present application includes a central plane, a first inclined plane and a second inclined plane, and the three respectively regulate the light in different viewing angle ranges. Compared with the optical film in the prior art, the optical film of the present application can more finely adjust the light emitting angle, thereby optimizing the viewing angle performance of the display device.
  • FIG. 1 is a schematic top view of an optical film according to a first embodiment of the present application.
  • FIG. 2 is a schematic cross-sectional view of the optical film of FIG. 1 along line A-A.
  • FIG. 3 is a three-dimensional schematic diagram of a base material and a convex portion of the optical film of FIG. 1 .
  • FIG. 4 is a comparison diagram of the light output intensity of the optical film of the prior art and the optical film of the present application as a function of viewing angle.
  • FIG. 5 is an optical path diagram when light passes through a convex portion in FIG. 2 .
  • FIG. 6 is a schematic cross-sectional view of an optical film in the prior art.
  • FIG. 7 is a schematic top view of an optical film according to a second embodiment of the present application.
  • FIG. 8 is a schematic top view of a convex portion of the optical film in FIG. 7 .
  • FIG. 9 is a three-dimensional schematic diagram of the base material and the convex portion of the optical film of FIG. 7 .
  • FIG. 10 is a schematic cross-sectional view of an optical film according to a third embodiment of the present application.
  • FIG. 11 is a schematic perspective view of the base material and the protrusions of the optical film of FIG. 10 .
  • FIG. 12 is an optical path diagram when light passes through a convex portion in FIG. 10 .
  • FIG. 13 is a schematic cross-sectional view of an optical film according to a fourth embodiment of the present application.
  • FIG. 14 is a three-dimensional schematic diagram of the base material and the convex portion of the optical film of FIG. 13 .
  • FIG. 15 is a schematic cross-sectional view of an optical film according to a fifth embodiment of the present application.
  • FIG. 16 is a partial cross-sectional schematic diagram of a structure of a display device of the present application.
  • FIG. 17 is a schematic partial cross-sectional view of another structure of the display device of the present application.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.
  • a first feature being “on” or “below” a second feature may include the first and second features directly, or may include that the first and second features are not not in direct contact but through additional feature contact between them.
  • “above”, “above” and “above” the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.
  • "Below”, “beneath” and “under” the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.
  • the present application provides an optical film, which can be used in displays such as liquid crystal displays or organic light emitting diode displays.
  • the optical film includes a base material and a plurality of protrusions provided on the surface of the base material.
  • the convex part includes a central plane, a first inclined plane and a second inclined plane.
  • the center plane is parallel to the surface of the substrate.
  • the first inclined plane is connected to the central plane, and the first inclined plane is away from the surface of the substrate along a direction away from the central plane.
  • the second inclined surface is connected between the first inclined surface and the bottom surface, and the second inclined surface is located on a side of the first inclined surface away from the center plane, and the second inclined surface is close to the surface of the substrate along the direction away from the center plane.
  • the optical film of the present application includes a central plane, a first inclined plane and a second inclined plane, and the three respectively regulate the light in different viewing angle ranges. Compared with the optical film in the prior art, the optical film of the present application can more finely adjust the light emitting angle, thereby optimizing the viewing angle performance of the display device.
  • the optical film 100 includes a substrate 10 and a protrusion 20 disposed on a surface 10 a of the substrate.
  • Both the base material 10 and the convex portion 20 are light-transmitting materials.
  • the base material 10 and the protrusion 20 can be made of the same kind of light-transmitting material, or can be made of light-transmitting materials with different refractive indices.
  • the refractive index of the substrate 10 is smaller than the refractive index of the protrusion 20 .
  • the base material 10 and the protrusion 20 can be made of flexible materials to meet the requirements of flexible displays, or they can be made of rigid materials.
  • the optical film 100 further includes a planarization layer 30 covering the convex portion 20 to achieve a finer light splitting effect.
  • the refractive index of the planarization layer 30 is greater than the refractive index of the base material 10 and the convex portion 20 .
  • the surface 10 a of the substrate may be the upper surface of the substrate 10 or the lower surface of the substrate 10 . Unless otherwise specified in the present invention, it is assumed that the surface 10 a of the substrate is the upper surface of the substrate 10 by default. It should be noted that being provided on the surface 10a of the base material 10 may refer to direct contact with the surface 10a of the base material, or may be indirect contact.
  • the protrusions 20 may have micron-level dimensions, and thus may also be referred to as microstructures.
  • the plurality of protrusions 20 are equidistantly arranged along the first direction D1.
  • a plurality of protrusions 20 may also be arranged at unequal intervals along the first direction D1.
  • the distance between adjacent protrusions 20 may be referred to as a grating distance, and the surface 10 a of the substrate between adjacent protrusions 20 can transmit light, but does not participate in light splitting.
  • Each protrusion 20 extends along the second direction D2.
  • the second direction D2 intersects the first direction D1, and optionally, the first direction D1 is perpendicular to the second direction D2.
  • each protrusion 20 may extend from one end of the substrate 10 to the other end.
  • a plurality of protrusions 20 may also be arranged on the substrate 10 in an array.
  • the second direction D2 of the extending direction of the protrusion 20 may be the up-down direction when displaying a picture.
  • the optical film 100 can optimize the left-right viewing angle performance of the display.
  • the optical film 100 can optimize the performance of the display's vertical viewing angle.
  • two optical film sheets 100 can also be used in a superimposed manner in such a manner that the extending directions of the respective convex portions 20 are perpendicular to each other.
  • the protrusion 20 is a prism with an inverted trapezoidal groove 20a.
  • the convex portion 20 is a prism, and the upper surface of the prism is provided with a groove 20a with an inverted trapezoidal cross section, and the groove 20a removes the entire top surface of the prism.
  • the groove 20 a extends from one end to the other end in the extension direction of the protrusion 20 , that is, the second direction D2 , and penetrates the entire protrusion 20 .
  • the convex portion 20 has a light incident surface 201 .
  • the light incident surface 201 is a surface on which light enters the protrusion 20 from the base material 10 .
  • the light incident surface 201 is parallel to the surface 10a of the substrate.
  • a plurality of light emitting surfaces are provided on the side of the protrusion 20 away from the base material 10.
  • the plurality of light emitting surfaces include a central plane 21 , a first inclined surface 22 , a second inclined surface 23 , a third inclined surface 24 and a fourth inclined surface 25 .
  • the convex portion 20 is a symmetrical structure with a plane of symmetry O.
  • the center plane 21 is located at the center of the convex portion 20 and is symmetrical with respect to the symmetry plane O. As shown in FIG.
  • the third inclined surface 24 is symmetrical to the first inclined surface 22 relative to the symmetrical plane O
  • the fourth inclined surface 25 is symmetrical to the second inclined surface 23 relative to the symmetrical plane O.
  • the convex portion 20 may also have an asymmetric structure, that is, the third inclined surface 24 and the first inclined surface 22 are not symmetrical with respect to the symmetrical plane O, and the fourth inclined surface 25 and the second inclined surface 23 are not symmetrical with respect to the symmetrical plane O. symmetry.
  • the central plane 21 is parallel to the surface 10a of the substrate.
  • the first inclined surface 22 is connected between the central plane 21 and the second inclined surface 23 .
  • the second inclined surface 23 is located on a side of the first inclined surface 22 away from the center plane 21 .
  • the second inclined surface 23 is connected between the first inclined surface 22 and the surface 10a of the substrate.
  • the first inclined surface 22 is inclined with respect to the surface 10 a of the base material, and the first inclined surface 22 is used to refract light toward a direction closer to the center of the convex portion 20 .
  • the first inclined surface 22 is away from the surface 10a of the substrate along the direction away from the central plane 21 .
  • the first inclined surface 22 is connected to one side of the central plane 21 and is located on a side of the central plane 21 away from the substrate 10 .
  • a first angle ⁇ is formed between the extended surface of the first inclined surface 22 and the surface 10 a of the substrate, and the first angle ⁇ is an acute angle.
  • the second inclined surface 23 is inclined with respect to the surface 10 a of the base material, and the second inclined surface 23 is used to refract light in a direction away from the center of the convex portion 20 .
  • the second inclined surface 23 is close to the surface 10a of the substrate along the direction away from the center plane 21 .
  • the second inclined surface 23 is connected to a side of the first inclined surface 22 away from the center plane 21 .
  • An angle is formed between the second inclined surface 23 and the first inclined surface 22 .
  • the direction in which the second inclined surface 23 is inclined is opposite to that of the first inclined surface 22 . That is, the first inclined surface 22 is inclined toward a first side in the vertical direction, and the second inclined surface 23 is inclined toward a second side opposite to the first side in the vertical direction. Optionally, the first side is the left side and the second side is the right side.
  • the second inclined surface 23 forms a second angle ⁇ with the surface 10 a of the substrate, and the second angle ⁇ is an obtuse angle. It should be noted that, herein, the angle formed with the surface 10a of the substrate refers to the angle formed with the first direction D1 of the surface 10a of the substrate.
  • the third inclined surface 24 is connected to one side of the central plane 21 and is located on a side of the central plane 21 away from the substrate 10 .
  • the third inclined surface 24 is connected between the central plane 21 and the fourth inclined surface 25 .
  • the fourth inclined surface 25 is connected between the third inclined surface 24 and the surface 10a of the substrate.
  • the fourth inclined surface 25 is located on a side of the third inclined surface 24 away from the central plane 21 .
  • the third inclined surface 24 is inclined with respect to the surface 10 a of the base material, and the third inclined surface 24 is used to refract light toward a direction closer to the center of the convex portion 20 .
  • the third inclined surface 24 is away from the surface 10a of the substrate along the direction away from the central plane 21 .
  • An obtuse angle is formed between the extended surface of the third inclined surface 24 and the surface 10 a of the base material.
  • the fourth inclined surface 25 is inclined with respect to the surface 10 a of the substrate, and the fourth inclined surface 25 is used to refract the light in a direction away from the center of the convex portion 20 .
  • the fourth inclined surface 25 is close to the surface 10a of the substrate along the direction away from the center plane 21 .
  • the fourth inclined surface 25 is connected to a side of the third inclined surface 24 away from the center plane 21 .
  • An angle is formed between the fourth inclined surface 25 and the third inclined surface 24 .
  • the direction in which the fourth inclined surface 25 is inclined is opposite to that of the third inclined surface 24 .
  • the third inclined surface 24 is inclined to the second side in the vertical direction
  • the fourth inclined surface 25 is inclined to the first side in the vertical direction.
  • the first side is the left side and the second side is the right side.
  • the fourth inclined surface 25 forms an acute angle with the surface 10a of the substrate.
  • the bottom surface of the groove 20 a is the central surface 21 .
  • Two opposite sides of the groove 20 a are a first inclined surface 22 and a third inclined surface 24 .
  • the two outer surfaces of the protrusion 20 are the second inclined surface 23 and the fourth inclined surface 25 .
  • the central plane 21 , the first inclined plane 22 , the second inclined plane 23 , the third inclined plane 24 and the fourth inclined plane 25 may all be planes, or planes provided with microstructures.
  • the inventor conducted a light intensity comparison test under different viewing angles on the optical film 100' of the prior art and the optical film 100 of the present embodiment under the same conditions.
  • the curve S1 represents the curve of the light intensity of the optical film 100 of the present application changing with the viewing angle.
  • Curve S2 represents the curve of the light intensity of the optical film 100' in the prior art as a function of viewing angle.
  • the angle of view shown in this article refers to: the angle of view at the symmetry plane O is a positive angle of view, that is, 0 degrees.
  • the angle of view on the left side of the symmetry plane O is a negative angle of view
  • the side view is the front view.
  • the difference between the optical film 100' of the prior art and the optical film 100 of the present application is that the convex portion 20' is a regular prism, and no groove is provided on the prism.
  • the abscissa is the viewing angle
  • the unit is degree
  • the ordinate is the light intensity
  • the convex portion 20 can use the central plane 21 as the light splitting center to play a light splitting effect.
  • the central plane 21 is used to control the emission of the light LT1 in the first viewing angle range.
  • the first inclined surface 22 is used to control the output of the light LT2 in the second viewing angle range. When light is emitted from the first inclined surface 22 , the light is emitted toward the center of the convex portion 20 .
  • the second inclined surface 23 is used to control the output of the light LT3 in the third viewing angle range.
  • the second inclined surface 23 When light is emitted from the second inclined surface 23 , the light is emitted in a direction away from the center of the convex portion 20 .
  • the symmetry plane O of the central plane 21 When the light exits from the convex part 20 , the symmetry plane O of the central plane 21 is viewed as 0 degree, and the angle of view increases as the distance from the symmetry plane O of the central plane 21 increases.
  • the central plane 21, the first inclined surface 22 and the third inclined surface 24 are directly connected, and the corresponding viewing angle ranges are three consecutive viewing angle ranges, that is, the first viewing angle range, the second viewing angle range and the third viewing angle range are sequentially Consecutive range of three viewing angles.
  • the maximum value of the first viewing angle range is equal to the minimum value of the second viewing angle range
  • the maximum value of the second viewing angle range is equal to the minimum value of the third viewing angle range.
  • the range of the first viewing angle is -10 degrees to 10 degrees
  • the range of the second viewing angle is 10 degrees to 30 degrees
  • the range of the third viewing angle is 30 degrees to 70 degrees.
  • the third inclined surface 24, which is symmetrical to the first inclined surface 22, is used to control the light in the viewing angle range of -10° to -30°.
  • the fourth inclined surface 25 symmetrical to the second inclined surface 23 is used to control the light in the viewing angle range of -30° to -70°.
  • the light intensity of the optical film 100 of the present application in the viewing angle ranges of -10 degrees to 10 degrees, -20 degrees to -90 degrees and 20 degrees to 90 degrees are all comparable to those of the prior art different. That is, by using the optical film 100 of the present application, it is possible to fine-tune the output of light in different viewing angle ranges. It can be understood that by adding more planes, first inclined surfaces and second inclined surfaces in the convex portion 20 of the optical film 100 , the light output can be further finely adjusted. A large number of experiments have proved that the optical film 100 of the present application can achieve light regulation within a range of 5 degrees. In addition, after being regulated by the optical film 100 of the present application, the light intensity at a viewing angle of 30 degrees to 70 degrees is significantly increased, and the light extraction rate is improved. Further, the light uniformity is improved.
  • the length of the central plane 21 in the first direction D1 can determine the size of the first viewing angle range and the light output intensity.
  • the longer the length of the central plane 21 in the first direction D1 the more light emitted from the central plane 21, the greater the maximum value of the first viewing angle range, and the stronger the light output in the first viewing angle range, that is, the smaller the angle Viewing angles get better.
  • the length of the first inclined surface 22 in the first direction D1 and the first angle ⁇ jointly determine the size of the second viewing angle range and the light output intensity.
  • the two can be adjusted in coordination to achieve a finer light control effect.
  • the length of the second inclined surface 23 in the first direction D1 and the second angle ⁇ jointly determine the size of the third viewing angle range and the light output intensity.
  • the convex portion 20 that is provided with an inclined surface in the first direction D1 to split light is shown.
  • the second embodiment of the present application shows that the convex portion 20 is also provided with an inclined surface for light splitting in the second direction D2 .
  • the protrusion 20 has a first symmetry plane O1 and a second symmetry plane O2, and the first symmetry plane O1 is perpendicular to the second symmetry plane O2.
  • the central plane 21 is symmetrical with respect to the first symmetry plane O1 and the second symmetry plane O2 respectively.
  • the third inclined surface 24 is symmetrical to the first inclined surface 22 with respect to the first symmetrical plane O1
  • the fourth inclined surface 25 is symmetrical to the second inclined surface 23 with respect to the first symmetrical plane O1 .
  • the convex portion 20 further includes: a fifth inclined surface 26 , a sixth inclined surface 27 , a seventh inclined surface 28 , and an eighth inclined surface 29 .
  • the fifth inclined surface 26 is connected to the center plane 21 and connected between the first inclined surface 22 and the third inclined surface 24 .
  • the fifth inclined surface 26 is inclined with respect to the surface 10 a of the base material, and the fifth inclined surface 26 is used to refract light toward a direction closer to the center of the convex portion 20 .
  • the fifth inclined surface 26 is away from the surface of the substrate 10 along the direction away from the central plane 21 .
  • the sixth inclined surface 27 is connected between the fifth inclined surface 26 and the surface of the substrate 10, and is connected between the second inclined surface 23 and the fourth inclined surface 25, and the sixth inclined surface 27 is located on the fifth inclined surface 26 The side away from the central plane 21.
  • the sixth inclined surface 27 is inclined with respect to the surface 10 a of the base material, and the sixth inclined surface 27 is used to refract light in a direction away from the center of the convex portion 20 .
  • the sixth inclined surface 27 is close to the surface 10a of the substrate along the direction away from the center plane 21 .
  • the seventh inclined surface 28 is symmetrical to the fifth inclined surface 26 with respect to the second symmetry plane O2.
  • the eighth inclined surface 29 and the sixth inclined surface 27 are symmetrical with respect to the second symmetry plane O2.
  • the seventh inclined surface 28 is connected to the central plane 21, and is connected between the first inclined surface 22 and the third inclined surface 24, and the seventh inclined surface 28 is away from the surface of the substrate 10 along the direction away from the central plane 21. .
  • the eighth inclined surface 29 is connected between the seventh inclined surface 28 and the surface of the substrate 10, and is connected between the second inclined surface 23 and the fourth inclined surface 25, and the eighth inclined surface 29 is located on the seventh inclined surface 28 On the side away from the central plane 21 , the eighth inclined surface 29 is close to the surface of the substrate 10 along the direction away from the central plane 21 . That is, the groove 20 a in the convex portion 20 is a truncated truncated portion, and the groove 20 a is formed in the convex portion 20 , but does not penetrate any side of the convex portion 20 .
  • the plurality of protrusions 20 are arranged in an array on the substrate 10 , that is, the plurality of protrusions 20 are arranged at intervals in the first direction D1 , and are also arranged at intervals in the second direction D2 perpendicular to the first direction D1 .
  • the differences between the optical film 100 of the third embodiment of the present application and the optical film 100 of the first embodiment are:
  • the protrusion 20 further includes a first connecting surface L1 connected between the first inclined surface 22 and the second inclined surface 23 , and the first connecting surface L1 is parallel to the surface 10 a of the substrate.
  • the protrusion 20 further includes a second connecting surface L2 connected between the third inclined surface 24 and the fourth inclined surface 25 .
  • the inventor believes that the reason is that: the first inclined surface 22 refracts the light LT2 in the second viewing angle range to the area close to the center of the convex part 20, and the second inclined surface 23 refracts the light LT3 in the third viewing angle range away from the convex part. 20 Central area refraction. Then, the light rays at the intersection of the first inclined surface 22 and the second inclined surface 23 are respectively emitted toward the side, and the light emitted from the front is reduced, resulting in a collapse of the light intensity.
  • a first connecting surface L1 parallel to the surface 10a of the substrate is added between the first inclined surface 22 and the second inclined surface 23, and a connecting surface L1 is added between the third inclined surface 24 and the fourth inclined surface 25.
  • the first connection surface L1 is used to control the output of the light LT4 in the fourth viewing angle range.
  • the second connection surface L2 makes up for the light intensity collapse of -20° to -40°.
  • the protrusion 20 includes a first sub-connection surface L11 and a second sub-connection surface L12 .
  • the first sub-connection surface L11 and the second sub-connection surface L12 are connected between the first inclined surface 22 and the second inclined surface 23, and the first sub-connection surface L11 is connected between the first inclined surface 22 and the second sub-connection surface L12. between.
  • the first sub-connection surface L11 is inclined relative to the surface 10 a of the substrate, and the first sub-connection surface L11 is used for refracting light toward a direction away from the center of the convex portion 20 .
  • the first sub-connection surface L11 is away from the surface 10 a of the substrate along a direction away from the center plane 21 .
  • the second sub-connection surface L12 is connected between the first sub-connection surface L11 and the second inclined surface 23, the second sub-connection surface L12 is inclined with respect to the surface 10a of the base material, and the second sub-connection surface L12 is used to direct the light toward The direction of the center of the convex portion 20 is refracted.
  • the second sub-connection surface L12 is close to the surface 10 a of the base material along the direction away from the central surface 21 .
  • the first sub-connection surface L11 and the second sub-connection surface L12 are microstructures formed between the first inclined surface 22 and the second inclined surface 23 .
  • the length h1 of the first sub-connection surface L11 in the direction perpendicular to the surface 10a of the substrate and the length h2 of the second sub-connection surface L12 in the direction perpendicular to the surface 10a of the substrate are both smaller than the length h2 of the second inclined surface 23 in the direction perpendicular to the surface 10a of the substrate.
  • the length h1 of the first sub-connection surface L11 in the direction perpendicular to the surface 10a of the substrate and the length h2 of the second sub-connection surface L12 in the direction perpendicular to the surface 10a of the substrate are the second inclined surface 23 is in the range of one-third to one-half of the length h3 in the direction perpendicular to the surface 10a of the substrate. Therefore, this part of the light intensity collapse can be compensated.
  • the protrusion 20 further includes a third sub-connection surface L13 and a fourth sub-connection surface L14 .
  • the third sub-connection surface L13 and the fourth sub-connection surface L14 are connected between the third inclined surface 24 and the fourth inclined surface 25, and the third sub-connection surface L13 is connected between the third inclined surface 24 and the fourth sub-connection surface L14. between. Since the protrusion 20 in this embodiment has a symmetrical structure, the structures of the third sub-connection surface L13 and the fourth sub-connection surface L14 can refer to the first sub-connection surface L11 and the second sub-connection surface L12 , and their descriptions are omitted here. In addition, more sub-connection surfaces can be provided for finer control. For example, as shown in the figure, a fifth sub-connection surface L15 can also be provided between the first sub-connection surface L11 and the first inclined surface 22 .
  • the differences between the optical film 100 of the fifth embodiment of the present application and the optical film 100 of the first embodiment are:
  • the center surface 21 is the top surface of the protrusion 20 .
  • a first groove 20a1 and a second groove 20a2 are defined in the protrusion 20 .
  • the first groove 20a1 and the second groove 20a2 are respectively located on two sides of the central plane 21 .
  • Both the first groove 20a1 and the second groove 20a2 are located on a side of the central plane 21 close to the surface 10a of the substrate.
  • One sidewall of the first groove 20 a forms a first inclined surface 22 .
  • the third connection surface L3 is inclined relative to the surface 10 a of the substrate, and the direction of the inclination is opposite to that of the first inclined surface 22 .
  • the third connecting surface L3 can refract light away from the center of the convex portion 20 .
  • a sidewall of the second groove 20a2 forms the third inclined surface 24 .
  • the fourth connection surface L4 is inclined relative to the surface 10 a of the substrate, and the direction of the inclination is opposite to that of the third inclined surface 24 .
  • the fourth connection surface L4 can refract light away from the center of the convex portion 20 .
  • the shape of the first groove 20a1 and the second groove 20a2 is a triangular prism.
  • the first groove 20a1 and the second groove 20a1 may also be in other shapes, such as a pyramid shape.
  • the present application also provides a display device.
  • the display device includes a display panel and the optical film in the embodiment of the present application.
  • the optical film is arranged on the light emitting side of the display panel.
  • the display device may be a liquid crystal display device or an organic light emitting diode display device.
  • the display device 1 shown in FIG. 16 is a liquid crystal display device.
  • the display device 1 includes a display panel 200 and an optical film 100 disposed on the light emitting side of the display panel 200 .
  • the display panel 200 is a liquid crystal display panel, which includes an array substrate, a color filter substrate, and a liquid crystal layer located between the array substrate and the color filter substrate.
  • the display device 1 includes an upper polarizer POL1 on the light-emitting side of the display panel 200 and a lower polarizer POL2 on the light-incoming side.
  • the upper polarizer POL1 of the liquid crystal display device 1 can be used as the substrate 10 of the optical film 100 , and the upper polarizer POL1 is provided with a convex portion 20 covered with a planarization layer 30 .
  • the light emitting side of the optical film 100 is further provided with an anti-reflection film AR.
  • the optical film 100 cooperates with the anti-reflection film AR to play a better adjustment function.
  • the convex portion 20 can be formed on the base material by using a roll-to-roll (Roll to Roll) process, but the forming process is not limited to the Roll to Roll process, and other thermoplastic forming processes can also be used.
  • the display device 1 shown in FIG. 17 is an OLED display device.
  • the display device 1 includes a display panel 200 .
  • the display panel 200 may be an organic light emitting diode display panel, which includes an array substrate, an OLED light emitting device disposed on the array substrate, and a thin film encapsulation layer TFE.
  • the thin film encapsulation layer TFE includes a first encapsulation layer TFE1 , a second encapsulation layer TFE2 disposed on the first encapsulation layer TFE1 , and a third encapsulation layer TFE3 disposed on the second encapsulation layer TFE2 .
  • the base material 10 of the optical film 100 is the first encapsulation layer TFE1
  • the protrusion 20 is the second encapsulation layer TFE2
  • the planarization layer 30 is the third encapsulation layer TFE3.
  • the convex portion 20 can be directly molded in the packaging material by photolithography.
  • the optical film of the present application it is possible to fine-tune the output of light in different viewing angle ranges.
  • the light intensity in the second viewing angle range and the third viewing angle range is significantly increased, and the light extraction rate is improved. Further, the light uniformity is improved.

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Electroluminescent Light Sources (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种光学膜片(100)和显示装置(1)。光学膜片(100)包括基材(10)和设置于基材(10)的表面(10a)的多个凸部(20)。凸部(20)包括中心面(21)、第一倾斜面(22)以及第二倾斜面(23)。第一倾斜面(22)与中心面(21)相连，第一倾斜面(22)沿着远离中心面(21)的方向远离基材(10)的表面(10a)。第二倾斜面(23)连接于第一倾斜面(22)与基材(10)的表面(10a)之间，第二倾斜面(23)沿着远离中心面(21)的方向靠近基材(10)的表面(10a)。

Description

光学膜片和显示装置 技术领域
本申请涉及显示技术领域，尤其涉及光学膜片和显示装置。
 背景技术
提升面板尺寸与分辨率是液晶显示器（Liquid Crystal Display，LCD）与有机发光二极管（Organic Light-emitting Diode，OLED）显示器等的主要发展方向。随着面板尺寸以及分辨率的提升，显示器的大视角表现越来越差，并且通过更改出光方式与器件结构在改善视角问题上收效甚微。为解决这一问题，业内通常采用外部光学解决方案来改善显示器的大视角表现。其中，最为普遍的一种方式为在显示器上增加具有不同光学微结构的视角改善膜片，来达到改善显示器大视角表现的目的。
但是，由于目前工艺水平的限制，市面上采用的视角改善膜的微结构形状都较为单一且规则，只能实现较大范围内出射光角度的改善，而无法在小范围内实现出射光角度的精细调控。
 技术问题
有鉴于此，本申请目的在于提供一种能够实现出射光角度精细调控的光学膜片以及显示装置。
 技术解决方案
本申请提供一种光学膜片，其包括基材和设置于所述基材的表面的凸部，所述凸部包括：
中心面，平行于所述基材的表面；
第一倾斜面，与所述中心面相连，所述第一倾斜面沿着远离所述中心面的方向远离所述基材的表面；以及
第二倾斜面，连接于所述第一倾斜面与所述基材的表面之间，且所述第二倾斜面位于所述第一倾斜面远离所述中心面的一侧，所述第二倾斜面沿着远离所述中心面的方向靠近所述基材的表面。
在一种实施方式中，所述凸部还包括第一连接面，所述第一连接面连接于所述第一倾斜面与所述第二倾斜面之间，所述第一连接面平行于所述基材的表面。
在一种实施方式中，所述凸部还包括第一子连接面和第二子连接面，所述第一子连接面与所述第二子连接面连接于所述第一倾斜面与所述第二倾斜面之间，
所述第一子连接面连接于所述第一倾斜面与所述第二连接面之间，所述第一子连接面相对于所述基材的表面倾斜，所述第一子连接面沿着远离所述中心面的方向远离所述基材的表面；
所述第二子连接面连接于所述第一子连接面与所述第二倾斜面之间，所述第二子连接面相对于所述基材的表面倾斜，所述第二子连接面沿着远离所述中心面的方向靠近所述基材的表面。
在一种实施方式中，所述凸部还具有第三倾斜面与第四倾斜面，其中，
所述第三倾斜面与所述中心面相连，所述第三倾斜面沿着远离所述中心面的方向远离所述基材的表面；
所述第四倾斜面连接于所述第三倾斜面与所述基材的表面之间，且所述第四倾斜面位于所述第三倾斜面远离所述中心面的一侧，所述第四倾斜面沿着远离所述中心面的方向靠近所述基材的表面。
在一种实施方式中，所述凸部具有对称平面，所述中心面相对于所述对称平面对称，所述第三倾斜面与所述第一倾斜面相对于所述对称平面对称，所述第四倾斜面与所述第二倾斜面相对于所述对称平面对称。
在一种实施方式中，所述凸部还包括：
第五倾斜面，与所述中心面相连，且连接于所述第一倾斜面与所述第三倾斜面之间，所述第五倾斜面沿着远离所述中心面的方向远离所述基材的表面；
第六倾斜面连接于所述第五倾斜面与所述基材的表面之间，且连接于所述第二倾斜面与所述第四倾斜面之间，且所述第六倾斜面位于所述第五倾斜面远离所述中心面的一侧，所述第六倾斜面沿着远离所述中心面的方向靠近所述基材的表面；
第七倾斜面与所述中心面相连，且连接于所述第一倾斜面与所述第三倾斜面之间，所述第七倾斜面沿着远离所述中心面的方向远离所述基材的表面；
第八倾斜面连接于所述第七倾斜面与所述基材的表面之间，且连接于所述第二倾斜面与所述第四倾斜面之间，且所述第八倾斜面位于所述第七倾斜面远离所述中心面的一侧，所述第八倾斜面沿着远离所述中心面的方向靠近所述基材的表面。
在一种实施方式中，所述凸部具有第一对称平面和第二对称平面，所述第一对称平面与所述第二对称平面垂直，所述中心面分别相对于所述第一对称平面和所述第二对称平面对称，所述第三倾斜面与所述第一倾斜面相对于所述第一对称平面对称，所述第四倾斜面与所述第二倾斜面相对于所述第一对称平面对称，第七倾斜面与所述第五倾斜面相对于所述第二对称平面对称，第八倾斜面与所述第六倾斜面相对于所述第二对称平面对称。
在一种实施方式中，所述凸部为开设有一凹槽的棱台，所述凹槽为截面为倒梯形的棱台，所述凹槽的底面为所述中心面，所述凹槽的一个侧面为所述第一倾斜面，所述棱台的一个外侧面为所述第二倾斜面。
在一种实施方式中，所述凸部为开设有一凹槽的棱台，所述凸部的顶面为所述中心面，所述凹槽的一个侧壁为所述第一倾斜面。
在一种实施方式中，所述光学膜片还包括平坦化层，所述平坦化层的折射率大于所述基材和所述凸部的折射率，所述凸部的折射率大于或者等于所述基材的折射率。
本申请还提供一种显示装置，其包括如上描述的光学膜片和显示面板，所述光学膜片设置于所述显示面板的出光侧。
在一种实施方式中，所述显示面板为液晶显示面板，所述显示装置还包括位于所述液晶显示面板的出光侧的上偏光片，所述上偏光片作为所述基材，所述凸部设置于所述上偏光片上，所述光学膜片的出光侧还设置有减反射膜。
在一种实施方式中，所述显示面板为有机发光二极管显示面板，所述有机发光二极管显示面板包括封装层，所述封装层包括第一封装层和设置于所述第一封装层上的第二封装层，所述光学膜片的所述基材为所述第一封装层，所述凸部为所述第二封装层。
 有益效果
本申请的光学膜片包括中心面、第一倾斜面和第二倾斜面，三者分别对不同视角范围的光线进行调控。相较于现有技术的光学膜片，本申请的光学膜片能够更精细地调节光线射出角度，从而优化显示装置的视角表现。
 附图说明
为了更清楚地说明本申请中的技术方案，下面将对实施方式描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施方式，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请第一实施方式的光学膜片的俯视示意图。
图2为图1的光学膜片沿A-A线的剖面示意图。
图3为图1的光学膜片的基材和凸部的立体示意图。
图4为现有技术的光学膜片与本申请的光学膜片的出光强度随着视角变化的对比图。
图5为光线经过图2的一个凸部时的光路图。
图6为现有技术的光学膜片的剖面示意图。
图7为本申请第二实施方式的光学膜片的俯视示意图。
图8为图7的光学膜片的一个凸部的俯视示意图。
图9为图7的光学膜片的基材和凸部的立体示意图。
图10为本申请第三实施方式的光学膜片的剖面示意图。
图11为图10的光学膜片的基材和凸部的立体示意图。
图12为光线经过图10的一个凸部时的光路图。
图13为本申请第四实施方式的光学膜片的剖面示意图。
图14为图13的光学膜片的基材和凸部的立体示意图。
图15为本申请第五实施方式的光学膜片的剖面示意图。
图16为本申请的显示装置的一种结构的部分剖面示意图。
图17为本申请的显示装置的另一种结构的部分剖面示意图。
 本发明的实施方式
下面将结合本申请实施方式中的附图，对本申请中的技术方案进行清楚、完整地描述。显然，所描述的实施方式仅仅是本申请一部分实施方式，而不是全部的实施方式。基于本申请中的实施方式，本领域技术人员在没有做出创造性劳动前提下所获得的所有其他实施方式，都属于本申请保护的范围。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接或可以相互通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。以上对本申请实施方式提供了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施方式的说明只是用于帮助理解本申请。同时，对于本领域的技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。
本申请提供一种光学膜片，其能够用于液晶显示器或者有机发光二极管显示器等显示器中。光学膜片包括基材和设置于基材的表面的多个凸部。凸部包括中心面、第一倾斜面以及第二倾斜面。中心面平行于基材的表面。第一倾斜面与中心面相连，第一倾斜面沿着远离中心面的方向远离基材的表面。第二倾斜面连接于第一倾斜面与底面之间，且第二倾斜面位于第一倾斜面远离中心面的一侧，第二倾斜面沿着远离中心面的方向靠近基材的表面。
本申请的光学膜片包括中心面、第一倾斜面和第二倾斜面，三者分别对不同视角范围的光线进行调控。相较于现有技术的光学膜片，本申请的光学膜片能够更精细地调节光线射出角度，从而优化显示装置的视角表现。
以下，结合附图说明本申请的具体实施方式。
请参考图1和图2，光学膜片100包括基材10和设置于基材的表面10a上的凸部20。基材10和凸部20均为透光材料。基材10和凸部20可以使用相同种类的透光材料形成，也可以采用不同折射率的透光材料制成。可选的，基材10的折射率小于凸部20的折射率。基材10和凸部20可以采用柔性材料制成，以适应柔性显示的需求，也可以采用刚性材料制成。可选的，光学膜片100还包括覆盖于凸部20上的平坦化层30，以实现更精细的分光效果。平坦化层30的折射率大于基材10与凸部20的折射率。
需要说明的是，基材的表面10a可以为基材10的上表面，也可以为基材10的下表面。本发明中不做特殊说明的情况下，默认为基材的表面10a为基材10的上表面。需要说明的是，设置于基材10的表面10a上，可以是指与基材的表面10a直接接触，也可以是间接接触。
凸部20可以具有微米级别的尺寸，因而也可以被称为微结构。多个凸部20沿第一方向D1等距离间隔设置。可选的，多个凸部20也可以沿第一方向D1不等距离间隔设置。相邻凸部20之间的间距可以被称为光栅间距，相邻凸部20之间的基材的表面10a能够透光，但不参与分光。每一凸部20沿第二方向D2延伸。第二方向D2与第一方向D1相交，可选的，第一方向D1与第二方向D2垂直。为了简化制程，每一凸部20可以从基材10的一端延伸至另一端。可选的，多个凸部20也可以呈阵列状排布在基材10上。
光学膜片100与显示面板搭配使用时，凸部20的延伸方向第二方向D2可以为显示画面时的上下方向。将光学膜片100以凸部20的延伸方向与显示画面的上下方向相同的方式设置在显示面板上时，光学膜片100能够优化显示器的左右视角表现。或者，将光学膜片100以凸部20的延伸方向与显示画面的左右方向相同的方式设置在显示面板上时，光学膜片100能够优化显示器的上下视角表现。在不考虑光损失的情况下，还可以将两张光学膜片100以各自的凸部20的延伸方向相互垂直的方式叠加使用。
请结合图2和图3，凸部20为具有倒梯形凹槽20a的棱台。具体地，凸部20为棱台，棱台的上表面开设有截面为倒梯形的凹槽20a，并且凹槽20a将整个棱台的顶面除去。可选的，凹槽20a从凸部20的延伸方向，即第二方向D2的一端延伸至另一端，穿透整个凸部20。凸部20具有入光面201。入光面201为光线从基材10射入凸部20的表面。入光面201平行于基材的表面10a。在凸部20远离基材10的一侧，设置有多个出光面。多个出光面包括中心面21、第一倾斜面22、第二倾斜面23、第三倾斜面24以及第四倾斜面25。凸部20为对称结构，具有对称面O。中心面21位于凸部20的中央，相对于对称面O对称。第三倾斜面24与第一倾斜面22相对于对称面O对称，第四倾斜面25与第二倾斜面23相对于对称面O对称。通过将凸部20设置为对称结构，能够使两侧出光均匀，提高显示品质，并能够大大降低制造难度。
可以理解，凸部20也可以是非对称结构，即，第三倾斜面24与第一倾斜面22不相对于对称面O对称，第四倾斜面25与第二倾斜面23不相对于对称面O对称。
中心面21平行于基材的表面10a。第一倾斜面22连接于中心面21与第二倾斜面23之间。第二倾斜面23位于第一倾斜面22远离中心面21的一侧。第二倾斜面23连接于第一倾斜面22与基材的表面10a之间。第一倾斜面22相对于基材的表面10a倾斜，第一倾斜面22用于使光线朝向靠近凸部20的中央的方向折射。第一倾斜面22沿着远离中心面21的方向远离基材的表面10a。第一倾斜面22连接于中心面21的一条边，且位于中心面21远离基材10的一侧。第一倾斜面22的延长面与基材的表面10a之间形成第一角度α，第一角度α为锐角。第二倾斜面23相对于基材的表面10a倾斜，第二倾斜面23用于使光线朝向远离凸部20的中央的方向折射。第二倾斜面23沿着远离中心面21的方向靠近基材的表面10a。第二倾斜面23连接于第一倾斜面22远离中心面21的一条边。第二倾斜面23与第一倾斜面22之间形成角度。第二倾斜面23与第一倾斜面22倾斜的方向相反。即，第一倾斜面22向竖直方向的第一侧倾斜，第二倾斜面23向竖直方向的与第一侧相对的第二侧倾斜。可选的，第一侧为左侧，第二侧为右侧。第二倾斜面23与基材的表面10a形成第二角度β，第二角度β为钝角。需要说明的是，在本文中，与基材的表面10a形成的角度均是指与基材的表面10a的第一方向D1形成的角度。
相似的，第三倾斜面24连接于中心面21的一条边，且位于中心面21远离基材10的一侧。第三倾斜面24连接于中心面21与第四倾斜面25之间。第四倾斜面25连接于第三倾斜面24与基材的表面10a之间。第四倾斜面25位于第三倾斜面24远离中心面21的一侧。第三倾斜面24相对于基材的表面10a倾斜，第三倾斜面24用于使光线朝向靠近凸部20的中央的方向折射。第三倾斜面24沿着远离中心面21的方向远离基材的表面10a。第三倾斜面24的延长面与基材的表面10a之间形成钝角。第四倾斜面25相对于基材的表面10a倾斜，第四倾斜面25用于使光线朝向远离凸部20的中央的方向折射。第四倾斜面25沿着远离中心面21的方向靠近基材的表面10a。第四倾斜面25连接于第三倾斜面24远离中心面21的一条边。第四倾斜面25与第三倾斜面24之间形成角度。第四倾斜面25与第三倾斜面24倾斜的方向相反。即，第三倾斜面24向竖直方向的第二侧倾斜，第四倾斜面25向竖直方向的第一侧倾斜。第一侧为左侧，第二侧为右侧。第四倾斜面25与基材的表面10a形成锐角。
简而言之，凹槽20a的底面为中心面21。凹槽20a的两个相对的侧面为第一倾斜面22和第三倾斜面24。凸部20的两个外侧面为第二倾斜面23和第四倾斜面25。中心面21、第一倾斜面22、第二倾斜面23、第三倾斜面24以及第四倾斜面25可以均为平面，也可以为设置有微结构的平面。
请参考图4和图5，发明人对现有技术的光学膜片100’与本实施方式的光学膜片100在相同条件下进行了不同视角下的光强度对比测试。其中，曲线S1表示本申请的光学膜片100的光强度随视角变化的曲线。曲线S2表示现有技术的光学膜片100’的光强度随视角变化的曲线。本文中所示的视角是指：对称面O处的视角为正视角，即0度，随着远离对称面O，视角逐渐增大，对称面O左侧的视角为负视角，对称面O右侧的视角为正视角。请参考图6，现有技术的光学膜片100’与本申请的光学膜片100的不同之处为：凸部20’为规则的棱台，棱台上未开设凹槽。图4中，横坐标为视角，单位为度，纵坐标为光强度，单位为1。分析本实施方式的光学膜片100的工作原理如下：
将本申请的光学膜片100设置于光源上（未图示）上时，光线从入光面201射入凸部20之后，凸部20能够以中心面21为分光中心起到分光效果。具体地，中心面21用于控制第一视角范围的光线LT1的出射。当光线从中心面21射出时，垂直于中心面21射出。第一倾斜面22用于控制第二视角范围的光线LT2的出射。当光线从第一倾斜面22射出时，光线朝靠近凸部20的中央的方向射出。第二倾斜面23用于控制第三视角范围的光线LT3的出射。当光线从第二倾斜面23射出时，光线朝远离凸部20的中央的方向射出。光线从凸部20射出时，以中心面21的对称面O处为正视0度，随着远离中心面21的对称面O视角增大。中心面21、第一倾斜面22以及第三倾斜面24直接相连，其对应的视角范围为依次连续的三个视角范围，即，第一视角范围、第二视角范围以及第三视角范围为依次连续的三个视角范围。即，第一视角范围的最大值等于第二视角范围的最小值，第二视角范围的最大值等于第三视角范围的最小值。在图4中，第一视角范围为-10度至10度；第二视角范围为10度至30度；第三视角范围为30度至70度。与第一倾斜面22对称的第三倾斜面24用于控制-10度至-30度的视角范围的光线。与第二倾斜面23对称的第四倾斜面25用于控制-30度至-70度的视角范围的光线。根据曲线S1与曲线S2的对比结果，本申请的光学膜片100在-10度至10度、-20度至-90度和20度至90度的视角范围内的出光强度均与现有技术不同。即，利用本申请的光学膜片100，能够对不同视角范围内的出光进行精细调控。可以理解，通过在光学膜片100的凸部20中增加更多的平面、第一倾斜面和第二倾斜面能够进一步对出光进行精细调控。大量实验证明，本申请的光学膜片100能够完成5度范围内的光线调控。此外，经过本申请的光学膜片100调控后，30度至70度视角下的光强显著增加，提高了光提取率。进一步，提高了出光均匀度。
发明人经过进一步研究发现：当其他参数固定时，中心面21在第一方向D1的长度能够决定第一视角范围的大小以及出光强度。具体地，中心面21在第一方向D1上的长度越长，从中心面21射出的光线越多，第一视角范围的最大值越大，第一视角范围的出光越强，即，小角度视角变好。第一倾斜面22在第一方向D1上的长度与第一角度α共同决定第二视角范围的大小以及出光强度。具体地，第一倾斜面22在第一方向D1上的长度越大，且第一角度α越大，从第一倾斜面22射出的光线越多，第二视角范围的最大值越大，第二视角范围的出光越强，即，中角度视角变好。并且，两者可以协同调整，达到更精细的出光调控效果。第二倾斜面23在第一方向D1上的长度与第二角度β共同决定第三视角范围的大小以及出光强度。具体地，第二倾斜面23在第一方向D1上的长度越大，且第二角度β越大，从第二倾斜面23射出的光线越多，第三视角范围的最大值越大，第三视角范围的出光越强，即，大角度视角变好。
在第一实施方式中，示出了在第一方向D1上设置有倾斜面进行分光的凸部20。请参考图7至图9，在本申请的第二实施方式示出了在第二方向D2上也设置有倾斜面进行分光的凸部20。
具体地，凸部20具有第一对称平面O1和第二对称平面O2，第一对称平面O1与第二对称平面O2垂直。需要说明的是，第二实施方式沿第一对称平面O1和第二对称平面O2的剖面示意图均可以参考图2，在此省略。中心面21分别相对于第一对称平面O1和第二对称平面O2对称。第三倾斜面24与第一倾斜面22相对于第一对称平面O1对称，第四倾斜面25与第二倾斜面23相对于第一对称平面O1对称。并且，凸部20还包括：第五倾斜面26、第六倾斜面27、第七倾斜面28以及第八倾斜面29。
第五倾斜面26与中心面21相连，且连接于第一倾斜面22与第三倾斜面24之间。第五倾斜面26相对于基材的表面10a倾斜，第五倾斜面26用于使光线朝向靠近凸部20的中央的方向折射。第五倾斜面26沿着远离中心面21的方向远离基材10的表面。第六倾斜面27连接于第五倾斜面26与基材10的表面之间，且连接于第二倾斜面23与第四倾斜面25之间，且第六倾斜面27位于第五倾斜面26远离中心面21的一侧。第六倾斜面27相对于基材的表面10a倾斜，第六倾斜面27用于使光线朝向远离凸部20的中央的方向折射。第六倾斜面27沿着远离中心面21的方向靠近基材的表面10a。第七倾斜面28与第五倾斜面26相对于第二对称平面O2对称。第八倾斜面29与第六倾斜面27相对于第二对称平面O2对称。具体地，第七倾斜面28与中心面21相连，且连接于第一倾斜面22与第三倾斜面24之间，第七倾斜面28沿着远离中心面21的方向远离基材10的表面。第八倾斜面29连接于第七倾斜面28与基材10的表面之间，且连接于第二倾斜面23与第四倾斜面25之间，且第八倾斜面29位于第七倾斜面28远离中心面21的一侧，第八倾斜面29沿着远离中心面21的方向靠近基材10的表面。即，凸部20中的凹槽20a为棱台，凹槽20a形成于凸部20中，但不贯穿凸部20的任一侧面。并且，多个凸部20在基材10上呈阵列排布，即多个凸部20在第一方向D1上间隔排列，且在与第一方向D1垂直的第二方向D2上也间隔排列。
请参考图10至图12，本申请的第三实施方式的光学膜片100与第一实施方式的光学膜片100的不同之处在于：
凸部20还包括第一连接面L1，第一连接面L1连接于第一倾斜面22与第二倾斜面23之间，第一连接面L1平行于基材的表面10a。相应的，凸部20还包括连接于第三倾斜面24与第四倾斜面25之间的第二连接面L2。请参考图4，在第一实施方式中，在-20度至-40度和20度至40度之间各有一个光强塌陷，即光强较弱的区域。发明人通过分析，认为其原因在于：第一倾斜面22将第二视角范围的光线LT2往靠近凸部20中央的区域折射，第二倾斜面23将第三视角范围的光线LT3往远离凸部20中央的区域折射。则，在第一倾斜面22与第二倾斜面23相交的位置处的光线的分别朝旁边射出，正面射出的光减少了，造成了光强塌陷。本实施方式通过在第一倾斜面22与第二倾斜面23之间增加一个平行于基材的表面10a的第一连接面L1，在第三倾斜面24与第四倾斜面25之间增加一个平行于基材的表面10a的第二连接面L2。如图12所示，第一连接面L1用于控制第四视角范围的光线LT4的出射。当光线从第一连接面L1射出时，垂直于第一连接面L1射出，即，正面射出，从而弥补了20度至40度的光强塌陷。同样地，第二连接面L2弥补了-20度至-40度的光强塌陷。
请参考图13和图14，本申请的第四实施方式的光学膜片100中，凸部20包括第一子连接面L11和第二子连接面L12。第一子连接面L11与第二子连接面L12连接于第一倾斜面22与第二倾斜面23之间，第一子连接面L11连接于第一倾斜面22与第二子连接面L12之间。第一子连接面L11相对于基材的表面10a倾斜，第一子连接面L11用于使光线朝向远离凸部20的中央的方向折射。第一子连接面L11沿着远离中心面21的方向远离基材的表面10a。第二子连接面L12连接于第一子连接面L11与第二倾斜面23之间，第二子连接面L12相对于基材的表面10a倾斜，第二子连接面L12用于使光线朝向靠近凸部20的中央的方向折射。第二子连接面L12沿着远离中心面21的方向靠近基材的表面10a。进一步，第一子连接面L11与第二子连接面L12为形成在第一倾斜面22和第二倾斜面23之间的微结构。第一子连接面L11在垂直于基材的表面10a的方向上的长度h1与第二子连接面L12在垂直于基材的表面10a的方向上的长度h2均小于第二倾斜面23在垂直于基材的表面10a的方向上的长度h3。可选的，第一子连接面L11在垂直于基材的表面10a的方向上的长度h1与第二子连接面L12在垂直于基材的表面10a的方向上的长度h2为第二倾斜面23在垂直于基材的表面10a的方向上的长度h3的三分之一至二分之一的范围内。由此，能够对这一部分光强塌陷进行补偿。同样地，在与第一子连接面L11与第二子连接面L12对称的另一侧，凸部20还包括第三子连接面L13和第四子连接面L14。第三子连接面L13和第四子连接面L14连接于第三倾斜面24与第四倾斜面25之间，第三子连接面L13连接于第三倾斜面24与第四子连接面L14之间。由于本实施方式的凸部20为对称结构，第三子连接面L13和第四子连接面L14的结构可以参考第一子连接面L11与第二子连接面L12，在此省略其说明。此外，还可以设置更多的子连接面来进行更精细的调控，例如图中所示，在第一子连接面L11与第一倾斜面22之间还可以设置有第五子连接面L15。
请参考图15，本申请的第五实施方式的光学膜片100与第一实施方式的光学膜片100的不同之处在于：
中心面21为凸部20的顶面。凸部20中开设有第一凹槽20a1和第二凹槽20a2。第一凹槽20a1和第二凹槽20a2分别位于中心面21的两侧。第一凹槽20a1和第二凹槽20a2均位于中心面21靠近基材的表面10a的一侧。第一凹槽20a的一个侧壁形成第一倾斜面22。中心面21与第一倾斜面22之间还具有第三连接面L3。第三连接面L3相对于基材的表面10a倾斜，且其倾斜的方向与第一倾斜面22相反。第三连接面L3能够将光线朝远离凸部20中央的方向折射出去。同样的，第二凹槽20a2的一个侧壁形成第三倾斜面24。中心面21与第四倾斜面25之间还具有第四连接面L4。第四连接面L4相对于基材的表面10a倾斜，且其倾斜的方向与第三倾斜面24相反。第四连接面L4能够将光线朝远离凸部20中央的方向折射出去。在本实施方式中，第一凹槽20a1与第二凹槽20a2的形状为三棱柱。但在其他实施方式中，第一凹槽20a1与第二凹槽20a1也可以为其他形状，例如棱台状。
本申请还提供一种显示装置。显示装置包括显示面板和本申请实施例中的光学膜片。光学膜片设置于显示面板的出光侧。具体地，显示装置可以为液晶显示装置或者有机发光二极管显示装置。
请参考图16，图16示出的显示装置1为液晶显示装置。显示装置1包括显示面板200和设置于显示面板200的出光侧的光学膜片100。具体地，显示面板200为液晶显示面板，其包括阵列基板、彩膜基板以及位于阵列基板和彩膜基板之间的液晶层。显示装置1包括位于显示面板200的出光侧的上偏光片POL1和入光侧的下偏光片POL2。在本实施方式中，可以利用液晶显示装置1的上偏光片POL1作为光学膜片100的基材10，上偏光片POL1上设置有凸部20，凸部20上覆盖平坦化层30。光学膜片100的出光侧还设置有减反射膜AR。光学膜片100配合减反射膜AR能够起到更好的调节作用。在本实施方式中，可以利用卷对卷（Roll  to  Roll）工艺在基底材料上进行凸部20的成型，但，成型工艺不仅限于Roll to Roll工艺，还可以利用其他热塑成型工艺。
请参考图17，图17示出的显示装置1为有机发光二极管显示装置。显示装置1包括显示面板200。显示面板200可以为有机发光二极管显示面板，其包括阵列基板、设置于阵列基板上的OLED发光器件以及薄膜封装层TFE。薄膜封装层TFE包括第一封装层TFE1、设置于第一封装层TFE1上的第二封装层TFE2以及设置于第二封装层TFE2上的第三封装层TFE3。光学膜片100的基材10为第一封装层TFE1，凸部20为第二封装层TFE2，平坦化层30为第三封装层TFE3。凸部20可以直接采用光刻工艺在封装材料中成型。
根据本申请的光学膜片，能够对不同视角范围内的出光进行精细调控。此外，经过本申请的光学膜片调控后，第二视角范围和第三视角范围下的光强显著增加，提高了光提取率。进一步，提高了出光均匀度。
以上对本申请实施方式提供了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施方式的说明只是用于帮助理解本申请。同时，对于本领域的技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (20)

  1. 一种光学膜片，包括基材和设置于所述基材的表面的多个凸部，所述凸部包括：
    中心面，平行于所述基材的表面；
    第一倾斜面，与所述中心面相连，所述第一倾斜面沿着远离所述中心面的方向远离所述基材的表面；以及
    第二倾斜面，连接于所述第一倾斜面与所述基材的表面之间，且所述第二倾斜面位于所述第一倾斜面远离所述中心面的一侧，所述第二倾斜面沿着远离所述中心面的方向靠近所述基材的表面。
  2. 如权利要求1所述的光学膜片，其中，所述凸部还包括第一连接面，所述第一连接面连接于所述第一倾斜面与所述第二倾斜面之间，所述第一连接面平行于所述基材的表面。
  3. 如权利要求1所述的光学膜片，其中，所述凸部还包括第一子连接面和第二子连接面，所述第一子连接面与所述第二子连接面连接于所述第一倾斜面与所述第二倾斜面之间，
    所述第一子连接面连接于所述第一倾斜面与所述第二子连接面之间，所述第一子连接面相对于所述基材的表面倾斜，所述第一子连接面沿着远离所述中心面的方向远离所述基材的表面；
    所述第二子连接面连接于所述第一子连接面与所述第二倾斜面之间，所述第二子连接面相对于所述基材的表面倾斜，所述第二子连接面沿着远离所述中心面的方向靠近所述基材的表面。
  4. 如权利要求1所述的光学膜片，其中，所述凸部还具有第三倾斜面与第四倾斜面，其中，
    所述第三倾斜面与所述中心面相连，所述第三倾斜面沿着远离所述中心面的方向远离所述基材的表面；
    所述第四倾斜面连接于所述第三倾斜面与所述基材的表面之间，且所述第四倾斜面位于所述第三倾斜面远离所述中心面的一侧，所述第四倾斜面沿着远离所述中心面的方向靠近所述基材的表面。
  5. 如权利要求4所述的光学膜片，其中，所述凸部具有对称平面，所述中心面相对于所述对称平面对称，所述第三倾斜面与所述第一倾斜面相对于所述对称平面对称，所述第四倾斜面与所述第二倾斜面相对于所述对称平面对称。
  6. 如权利要求4所述的光学膜片，其中，所述凸部还包括：
    第五倾斜面，与所述中心面相连，且连接于所述第一倾斜面与所述第三倾斜面之间，所述第五倾斜面沿着远离所述中心面的方向远离所述基材的表面；
    第六倾斜面连接于所述第五倾斜面与所述基材的表面之间，且连接于所述第二倾斜面与所述第四倾斜面之间，且所述第六倾斜面位于所述第五倾斜面远离所述中心面的一侧，所述第六倾斜面沿着远离所述中心面的方向靠近所述基材的表面；
    第七倾斜面与所述中心面相连，且连接于所述第一倾斜面与所述第三倾斜面之间，所述第七倾斜面沿着远离所述中心面的方向远离所述基材的表面；
    第八倾斜面连接于所述第七倾斜面与所述基材的表面之间，且连接于所述第二倾斜面与所述第四倾斜面之间，且所述第八倾斜面位于所述第七倾斜面远离所述中心面的一侧，所述第八倾斜面沿着远离所述中心面的方向靠近所述基材的表面。
  7. 如权利要求6所述的光学膜片，其中，所述凸部具有第一对称平面和第二对称平面，所述第一对称平面与所述第二对称平面垂直，所述中心面分别相对于所述第一对称平面和所述第二对称平面对称，所述第三倾斜面与所述第一倾斜面相对于所述第一对称平面对称，所述第四倾斜面与所述第二倾斜面相对于所述第一对称平面对称，第七倾斜面与所述第五倾斜面相对于所述第二对称平面对称，第八倾斜面与所述第六倾斜面相对于所述第二对称平面对称。
  8. 如权利要求1所述的光学膜片，其中，所述凸部为开设有一凹槽的棱台，所述凹槽为截面为倒梯形的棱台，所述凹槽的底面为所述中心面，所述凹槽的一个侧面为所述第一倾斜面，所述棱台的一个外侧面为所述第二倾斜面。
  9. 如权利要求1所述的光学膜片，其中，所述凸部为开设有一凹槽的棱台，所述凸部的顶面为所述中心面，所述凹槽的一个侧壁为所述第一倾斜面。
  10. 如权利要求1所述的光学膜片，其中，所述光学膜片还包括平坦化层，所述平坦化层的折射率大于所述基材和所述凸部的折射率，所述凸部的折射率大于或者等于所述基材的折射率。
  11. 一种显示装置，包括：
    显示面板；
    光学膜片，设置于所述显示面板的出光侧，所述光学膜片包括基材和设置于所述基材的表面的多个凸部，所述凸部包括：
    中心面，平行于所述基材的表面；
    第一倾斜面，与所述中心面相连，所述第一倾斜面沿着远离所述中心面的方向远离所述基材的表面；以及
    第二倾斜面，连接于所述第一倾斜面与所述基材的表面之间，且所述第二倾斜面位于所述第一倾斜面远离所述中心面的一侧，所述第二倾斜面沿着远离所述中心面的方向靠近所述基材的表面。
  12. 如权利要求11所述的显示装置，其中，所述凸部还包括第一连接面，所述第一连接面连接于所述第一倾斜面与所述第二倾斜面之间，所述第一连接面平行于所述基材的表面。
  13. 如权利要求11所述的显示装置，其中，所述凸部还包括第一子连接面和第二子连接面，所述第一子连接面与所述第二子连接面连接于所述第一倾斜面与所述第二倾斜面之间，
    所述第一子连接面连接于所述第一倾斜面与所述第二子连接面之间，所述第一子连接面相对于所述基材的表面倾斜，所述第一子连接面沿着远离所述中心面的方向远离所述基材的表面；
    所述第二子连接面连接于所述第一子连接面与所述第二倾斜面之间，所述第二子连接面相对于所述基材的表面倾斜，所述第二子连接面沿着远离所述中心面的方向靠近所述基材的表面。
  14. 如权利要求11所述的显示装置，其中，所述凸部还具有第三倾斜面与第四倾斜面，其中，
    所述第三倾斜面与所述中心面相连，所述第三倾斜面沿着远离所述中心面的方向远离所述基材的表面；
    所述第四倾斜面连接于所述第三倾斜面与所述基材的表面之间，且所述第四倾斜面位于所述第三倾斜面远离所述中心面的一侧，所述第四倾斜面沿着远离所述中心面的方向靠近所述基材的表面。
  15. 如权利要求14所述的显示装置，其中，所述凸部具有对称平面，所述中心面相对于所述对称平面对称，所述第三倾斜面与所述第一倾斜面相对于所述对称平面对称，所述第四倾斜面与所述第二倾斜面相对于所述对称平面对称。
  16. 如权利要求14所述的显示装置，其中，所述凸部还包括：
    第五倾斜面，与所述中心面相连，且连接于所述第一倾斜面与所述第三倾斜面之间，所述第五倾斜面沿着远离所述中心面的方向远离所述基材的表面；
    第六倾斜面连接于所述第五倾斜面与所述基材的表面之间，且连接于所述第二倾斜面与所述第四倾斜面之间，且所述第六倾斜面位于所述第五倾斜面远离所述中心面的一侧，所述第六倾斜面沿着远离所述中心面的方向靠近所述基材的表面；
    第七倾斜面与所述中心面相连，且连接于所述第一倾斜面与所述第三倾斜面之间，所述第七倾斜面沿着远离所述中心面的方向远离所述基材的表面；
    第八倾斜面连接于所述第七倾斜面与所述基材的表面之间，且连接于所述第二倾斜面与所述第四倾斜面之间，且所述第八倾斜面位于所述第七倾斜面远离所述中心面的一侧，所述第八倾斜面沿着远离所述中心面的方向靠近所述基材的表面。
  17. 如权利要求16所述的显示装置，其中，所述凸部具有第一对称平面和第二对称平面，所述第一对称平面与所述第二对称平面垂直，所述中心面分别相对于所述第一对称平面和所述第二对称平面对称，所述第三倾斜面与所述第一倾斜面相对于所述第一对称平面对称，所述第四倾斜面与所述第二倾斜面相对于所述第一对称平面对称，第七倾斜面与所述第五倾斜面相对于所述第二对称平面对称，第八倾斜面与所述第六倾斜面相对于所述第二对称平面对称。
  18. 如权利要求11所述的显示装置，其中，所述凸部为开设有一凹槽的棱台，所述凹槽为截面为倒梯形的棱台，所述凹槽的底面为所述中心面，所述凹槽的一个侧面为所述第一倾斜面，所述棱台的一个外侧面为所述第二倾斜面。
  19. 如权利要求11所述的显示装置，其中，所述显示面板为液晶显示面板，所述显示装置还包括位于所述液晶显示面板的出光侧的上偏光片，所述上偏光片作为所述基材，所述凸部设置于所述上偏光片上，所述光学膜片的出光侧还设置有减反射膜。
  20. 如权利要求11所述的显示装置，其中，所述显示面板为有机发光二极管显示面板，所述有机发光二极管显示面板包括封装层，所述封装层包括第一封装层和设置于所述第一封装层上的第二封装层，所述光学膜片的所述基材为所述第一封装层，所述凸部为所述第二封装层。
PCT/CN2021/119121 2021-08-19 2021-09-17 光学膜片和显示装置 Ceased WO2023019674A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US17/607,470 US12197065B2 (en) 2021-08-19 2021-09-17 Optical film and display device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110952725.0A CN113687532B (zh) 2021-08-19 2021-08-19 光学膜片和显示装置
CN202110952725.0 2021-08-19

Publications (1)

Publication Number Publication Date
WO2023019674A1 true WO2023019674A1 (zh) 2023-02-23

Family

ID=78580659

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/119121 Ceased WO2023019674A1 (zh) 2021-08-19 2021-09-17 光学膜片和显示装置

Country Status (3)

Country Link
US (1) US12197065B2 (zh)
CN (1) CN113687532B (zh)
WO (1) WO2023019674A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7603028B2 (ja) 2021-12-17 2024-12-19 深▲セン▼市▲華▼星光▲電▼半▲導▼体▲顕▼示技▲術▼有限公司 ディスプレイパネル
CN114300633B (zh) * 2021-12-17 2023-11-28 深圳市华星光电半导体显示技术有限公司 显示面板
KR20240061967A (ko) * 2022-11-01 2024-05-08 엘지디스플레이 주식회사 발광 다이오드 표시 장치

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1306625A (zh) * 1999-05-20 2001-08-01 宗托贝尔·斯塔夫有限责任公司 具有用于反射光束的微棱镜结构的光学元件
US20060176565A1 (en) * 2005-02-10 2006-08-10 Fuji Photo Film Co., Ltd. Prism lens film and flat light emitting device
JP2009258666A (ja) * 2008-03-28 2009-11-05 Toppan Printing Co Ltd 機能性部材、光学部品、バックライトユニット及び表示装置
CN202631771U (zh) * 2012-05-24 2012-12-26 北京京东方光电科技有限公司 光学膜及显示装置
CN202975376U (zh) * 2012-10-10 2013-06-05 江阴通利光电科技有限公司 一种光学棱镜片
CN106684256A (zh) * 2016-12-23 2017-05-17 上海天马有机发光显示技术有限公司 一种显示面板及其制作方法
CN211123564U (zh) * 2019-03-11 2020-07-28 深圳阜时科技有限公司 一种光学膜层结构、背光模组、显示装置及电子设备
CN111796349A (zh) * 2020-07-02 2020-10-20 Tcl华星光电技术有限公司 一种视角扩散膜片及显示面板

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005300576A (ja) * 2004-04-06 2005-10-27 Konica Minolta Opto Inc 防眩性反射防止フィルム、偏光板及び表示装置
CN1766704A (zh) * 2004-10-29 2006-05-03 清华大学 导光板和面发光装置
JP2006251660A (ja) * 2005-03-14 2006-09-21 Fuji Photo Film Co Ltd プリズムレンズフィルム及び平面型発光装置
EP1959275B1 (en) * 2005-12-09 2013-10-23 Sony Corporation Surface light emission device and liquid crystal display
JP2009152152A (ja) * 2007-12-21 2009-07-09 Toppan Printing Co Ltd 導光体ユニット、バックライトユニット及びディスプレイ装置
JPWO2011030594A1 (ja) * 2009-09-11 2013-02-04 旭化成イーマテリアルズ株式会社 点光源用光拡散板及び直下型点光源バックライト装置
CN106896575B (zh) * 2017-03-03 2020-05-01 京东方科技集团股份有限公司 双视显示的微结构及使用其的光学膜片和液晶显示模组
CN108302402A (zh) * 2018-04-02 2018-07-20 中蓝光电科技（上海）股份有限公司 一种超薄平面型控光板及led照明装置
TWM592981U (zh) * 2019-04-09 2020-04-01 台煒有限公司 前光源模組
EP4024099B1 (en) * 2019-08-26 2023-11-22 Lg Chem, Ltd. Polarizing plate laminate and display device comprising same

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1306625A (zh) * 1999-05-20 2001-08-01 宗托贝尔·斯塔夫有限责任公司 具有用于反射光束的微棱镜结构的光学元件
US20060176565A1 (en) * 2005-02-10 2006-08-10 Fuji Photo Film Co., Ltd. Prism lens film and flat light emitting device
JP2009258666A (ja) * 2008-03-28 2009-11-05 Toppan Printing Co Ltd 機能性部材、光学部品、バックライトユニット及び表示装置
CN202631771U (zh) * 2012-05-24 2012-12-26 北京京东方光电科技有限公司 光学膜及显示装置
CN202975376U (zh) * 2012-10-10 2013-06-05 江阴通利光电科技有限公司 一种光学棱镜片
CN106684256A (zh) * 2016-12-23 2017-05-17 上海天马有机发光显示技术有限公司 一种显示面板及其制作方法
CN211123564U (zh) * 2019-03-11 2020-07-28 深圳阜时科技有限公司 一种光学膜层结构、背光模组、显示装置及电子设备
CN111796349A (zh) * 2020-07-02 2020-10-20 Tcl华星光电技术有限公司 一种视角扩散膜片及显示面板

Also Published As

Publication number Publication date
US20240027657A1 (en) 2024-01-25
US12197065B2 (en) 2025-01-14
CN113687532B (zh) 2022-12-06
CN113687532A (zh) 2021-11-23

Similar Documents

Publication Publication Date Title
WO2023019674A1 (zh) 光学膜片和显示装置
US10833294B2 (en) Display panel and display device
US7439938B2 (en) Multi-display apparatus having an optical path changing device
CN110673388B (zh) 显示面板及其显示方法、显示装置
US7796212B2 (en) Liquid crystal display device having improved viewing angle and brightness
US20180149875A1 (en) 3D Display Device
US10698275B2 (en) Display apparatus
WO2013157341A1 (ja) 液晶表示装置
CN104062798A (zh) 显示设备
CN213843580U (zh) 导光板、背光模组及显示装置
US20180107059A1 (en) Liquid crystal display module and liquid crystal display
US10606144B2 (en) Display apparatus
CN110161758A (zh) 光转换结构、背光模组及虚拟现实显示装置
CN106019687B (zh) 一种显示面板和显示装置
WO2023070751A1 (zh) 光学膜片和显示装置
CN103487867A (zh) 导光板及应用其的背光模块
TW202311789A (zh) 集光型導光板及顯示裝置
WO2020062603A1 (zh) 偏光结构及显示装置
CN103488021B (zh) 菲涅耳液晶透镜及平面/立体显示装置
US12158651B2 (en) Display panel and display device
CN101210976A (zh) 导光板及背光模组
WO2020155271A1 (zh) 光学膜层和显示装置
WO2023138542A1 (zh) 偏振光栅装置及液晶显示器
US12613493B2 (en) Hologram sheet and hologram display apparatus including the same
US20250052940A1 (en) Display device

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 17607470

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21953910

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21953910

Country of ref document: EP

Kind code of ref document: A1