WO2016173018A1 - 偏光片及其制备方法、液晶面板 - Google Patents

偏光片及其制备方法、液晶面板 Download PDF

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Publication number
WO2016173018A1
WO2016173018A1 PCT/CN2015/079513 CN2015079513W WO2016173018A1 WO 2016173018 A1 WO2016173018 A1 WO 2016173018A1 CN 2015079513 W CN2015079513 W CN 2015079513W WO 2016173018 A1 WO2016173018 A1 WO 2016173018A1
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Prior art keywords
polarizer
microstructure
substrate
light
thermosetting resin
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PCT/CN2015/079513
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English (en)
French (fr)
Inventor
刘丹丹
李得俊
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深圳市华星光电技术有限公司
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Priority to US14/770,127 priority Critical patent/US10012860B2/en
Publication of WO2016173018A1 publication Critical patent/WO2016173018A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133502—Antiglare, refractive index matching layers
    • 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
    • G02B5/305—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 including organic materials, e.g. polymeric layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00317—Production of lenses with markings or patterns
    • B29D11/00326—Production of lenses with markings or patterns having particular surface properties, e.g. a micropattern
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00634—Production of filters
    • B29D11/00644—Production of filters polarizing
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/111—Anti-reflection coatings using layers comprising organic materials
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/118—Anti-reflection coatings having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • 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
    • G02F1/133507—Films for enhancing the luminance
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/50—Protective arrangements
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/02—Materials and properties organic material
    • G02F2202/022—Materials and properties organic material polymeric

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a polarizing plate, a method for fabricating the same, and a liquid crystal panel including the polarized light.
  • LCD Liquid Crystal Display
  • TFT Thin Film Transistor
  • a liquid crystal display includes a liquid crystal panel and upper and lower polarizers attached to an outer surface of the liquid crystal panel to form polarized light and control the passage of light.
  • the polarizer includes a release film, an adhesive layer, a first protective layer, a polarizing film, a second protective layer, and a surface protective film which are laminated in this order.
  • the release film is removed from the polarizer to attach the adhesive layer to the liquid crystal panel, and the surface protective film is removed after attaching the polarizer.
  • the existing polarizer generally has a transmittance of only 42%, and due to the surface reflection phenomenon of the polarizer, if the ambient light is strong, the readability of the display is deteriorated.
  • a method of increasing the brightness of the backlight is generally used, but this will increase the power consumption of the backlight.
  • the present invention provides a polarizer and a liquid crystal panel including the polarizer. Improves the readability of the display in bright light conditions.
  • a polarizer comprising a polarizer substrate, wherein the polarizer substrate is provided with a plurality of raised microstructures, the microstructure comprising two or more layers of light or a thermosetting resin material.
  • each layer of the light or thermosetting resin material is individually selected from any one of polyethylene terephthalate, polymethyl methyl propionate, polycarbonate or polystyrene.
  • the microstructure is elongated, and a plurality of elongated microstructures are arranged along a lateral or longitudinal direction of the polarizer substrate.
  • the microstructure has a convex shape, and a plurality of bump-shaped microstructure arrays are distributed on the polarizer substrate.
  • the width of the microstructure is 50 nm to 200 nm, and the spacing between two adjacent microstructures is 50 nm to 200 nm.
  • the polarizer substrate comprises a first protective film, a polarizing film and a second protective film which are laminated, and the microstructure is disposed on the second protective film.
  • the method for preparing a polarizer as described above comprising the steps of: providing a polarizer substrate and coating two or more layers of light or thermosetting resin material on the polarizer substrate; and the light or heat curing resin material A plurality of illumination spots or heating points are applied such that the light or thermosetting resin material contracts around the plurality of illumination points or heating points to form a plurality of raised microstructures.
  • a plurality of illumination points or heating points are connected to form a light line or a heating line in a longitudinal or lateral direction of the polarizer substrate, and a plurality of the illumination lines or heating lines are arranged on the polarizer substrate.
  • the light or thermosetting resin material shrinks around the plurality of illumination lines or heating lines to form a plurality of elongated microstructures.
  • the plurality of illumination points or heating points are applied to the light or thermosetting resin material in an array, and the light or thermosetting resin material shrinks around the plurality of illumination points or heating points to form A bump-like microstructure of the array.
  • a liquid crystal panel including a thin film transistor substrate and a color filter substrate disposed opposite to each other, and a liquid crystal layer between the thin film transistor substrate and the color filter substrate, the thin film transistor substrate being connected There is a first polarizer, and a second polarizer is connected to the color filter substrate, wherein at least the second polarizer adopts a polarizer as described above.
  • a microstructure layer is added to the polarizer, and the microstructure is refracted to the ambient light. Scattering reduces reflections, improves the contrast of the display, and improves the readability of the display in bright light environments.
  • the microstructure layer forms a diffuse reflection on the reflected reflection and refraction of the emitted backlight. Improve the uniformity of the emitted light, increasing the contrast and sharpness of the LCD panel at a large viewing angle.
  • Figure 1 is a schematic view showing the structure of a polarizer in Embodiment 1 of the present invention.
  • FIGS. 2a to 2d are exemplary illustrations of a method of preparing a polarizer in Embodiment 1 of the present invention.
  • Figure 3 is a schematic view showing the structure of a polarizer in Embodiment 2 of the present invention.
  • 4a to 4d are exemplary illustrations of a method of preparing a polarizer in Embodiment 2 of the present invention.
  • Figure 5 is a schematic view showing the structure of a liquid crystal display device in Embodiment 3 of the present invention.
  • Fig. 6 is a schematic structural view of a liquid crystal panel in Embodiment 3 of the present invention.
  • the polarizer comprises a polarizer substrate 1 and a plurality of raised microstructures 2 disposed on the polarizer substrate 1.
  • the polarizer substrate 1 includes a first protective film 1a, a polarizing film 1b, and a second protective film 1c, which are disposed on the second protective film 1c.
  • the microstructure 2 has a convex shape, and a plurality of arrays of microstructures 2 having a bump shape are distributed on the polarizer substrate 1.
  • the microstructure 2 comprises three layers of light or thermosetting resin materials 2a, 2b, 2c.
  • Each of the light or thermosetting resin materials 2a, 2b, 2c is individually selected from any one of polyethylene terephthalate, polymethyl methyl propionate, polycarbonate or polystyrene.
  • the number of layers of the light or thermosetting resin material may be selected to be two or more layers.
  • the material of the polarizing film 1b is polyvinyl alcohol (PVA); the materials of the first protective film 1a and the second protective film 1c are all triacetyl cellulose (TAC), TAC protective film 1a, 1c
  • PVA polyvinyl alcohol
  • TAC triacetyl cellulose
  • TAC protective film 1a, 1c The main purpose is to protect the PVA polarizing film 1b to improve the mechanical properties of the PVA polarizing film 1b and prevent the PVA polarizing film 1b from shrinking.
  • the preparation method of the polarizer as above includes the steps of:
  • a polarizer substrate 1 is provided, as shown in Fig. 2a.
  • the specific shape of the bump-like microstructure 2 is mainly determined by the light or heat shrinkage ratio of the selected light or thermosetting resin materials 2a, 2b, 2c.
  • the light or heat shrinkage ratio of the three layers of materials is the same, and the finally obtained microstructure 2 has a cylindrical shape.
  • the light or heat shrinkage rate of the three-layer material is gradually increased from the bottom to the top, and the finally obtained microstructure 2 has a shape that is small and large.
  • the microstructure 2 has a width of 50 nm to 200 nm, and the adjacent two microstructures 2 have a pitch of 50 nm to 200 nm.
  • a microstructure layer is added, which refracts and scatters ambient light, reduces reflection, improves the contrast of the display, and improves the readability of the display in a strong light environment.
  • the polarizer comprises a polarizer substrate 1 and a plurality of raised microstructures 2 disposed on the polarizer substrate 1.
  • the polarizer substrate 1 includes a first protective film 1a, a polarizing film 1b, and a second protective film 1c, which are disposed on the second protective film 1c.
  • the microstructures 2 are elongated, and a plurality of elongated microstructures 2 are arranged in the lateral or longitudinal direction of the polarizer substrate 1.
  • the microstructure 2 comprises two layers of light or thermosetting resin materials 2a, 2b.
  • Each of the light or thermosetting resin materials 2a, 2b is individually selected from any one of polyethylene terephthalate, polymethyl methyl propionate, polycarbonate or polystyrene.
  • the number of layers of the light or thermosetting resin material may be selected to be two or more layers.
  • the material of the polarizing film 1b is polyvinyl alcohol (PVA); the materials of the first protective film 1a and the second protective film 1c are all triacetyl cellulose (TAC),
  • TAC protective films 1a, 1c are mainly used to protect the PVA polarizing film 1b to improve the mechanical properties of the PVA polarizing film 1b and prevent the PVA polarizing film 1b from shrinking.
  • the method for preparing a polarizer as above includes the steps of:
  • the specific shape of the elongated microstructure 2 in its height direction is mainly determined by the light or heat shrinkage ratio of the selected light or thermosetting resin materials 2a, 2b.
  • the light or heat shrinkage ratio of the two layers of materials is the same, and the resulting microstructure 2 has a square strip shape.
  • the light or heat shrinkage rate of the underlying material is smaller than the light or heat shrinkage ratio of the upper layer material, and the finally obtained microstructure 2 has a shape that is small and large in its height direction.
  • the microstructure 2 has a width of 50 nm to 200 nm, and the adjacent two microstructures 2 have a pitch of 50 nm to 200 nm.
  • a microstructure layer is added, which refracts and scatters ambient light, reduces reflection, improves the contrast of the display, and improves the readability of the display in a strong light environment.
  • the liquid crystal display 100 includes a liquid crystal panel 100 and a backlight module 200 .
  • the liquid crystal panel 100 is opposite to the backlight module 200 , and the backlight module 200 provides a display light source to the liquid crystal panel 100 .
  • the liquid crystal panel 100 is caused to display an image.
  • the liquid crystal panel 100 includes a thin film transistor (TFT) substrate 10 and a color filter (CF) substrate 20 disposed opposite to each other, and a liquid crystal layer 30 between the thin film transistor substrate 10 and the color filter substrate 20, A first polarizer 40 is attached to the thin film transistor substrate 10, and the color filter substrate is A second polarizer 50 is connected to 20 .
  • the second polarizer 50 located on at least the light-emitting surface adopts the polarizer provided in Embodiment 1 or 2.
  • the second polarizer 50 on the light-emitting surface adopts the polarizer provided in Embodiment 1 or Embodiment 2.
  • the microstructure in the polarizer refracts and scatters ambient light, reduces reflection, and improves the contrast of the display. Improves the readability of the display in bright light conditions.
  • the microstructure layer forms diffuse reflection on the reflected backlight and refraction of the emitted backlight, improves the uniformity of the emitted light, and increases the contrast and sharpness of the liquid crystal panel at a large viewing angle.
  • the first polarizer 40 on the light incident surface may be a conventional polarizer. Alternatively, the polarizer provided in Embodiment 1 or Embodiment 2 may be used.
  • the polarizer provided in Embodiment 1 or Embodiment 2 may be used. In time, it can make the incident light more uniform, further improving the display quality of the liquid crystal display.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ophthalmology & Optometry (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

一种偏光片以及包含该偏光片的液晶面板，包括偏光片基材（1），其中，所述偏光片基材（1）上设置有多个凸起的微结构（2），所述微结构（2）包括两层以上的光或热固化树脂材料（2a，2b，2c）。其制备方法包括：提供一偏光片基材（1）并在该偏光片基材（1）上涂布两层以上的光或热固化树脂材料（2a，2b，2c）；对所述光或热固化树脂材料（2a，2b，2c）施加多个光照点或加热点（3），使得该光或热固化树脂材料（2a，2b，2c）以所述多个光照点或加热点(3)为中心收缩，形成多个凸起的微结构(2)。

Description

偏光片及其制备方法、液晶面板 技术领域
本发明涉及液晶显示技术领域,尤其涉及一种偏光片及其制备方法以及包含该偏光的液晶面板。
背景技术
液晶显示器(Liquid Crystal Display，LCD)，为平面超薄的显示设备，它由一定数量的彩色或黑白像素组成，放置于光源或者反射面前方。液晶显示器功耗很低，并且具有高画质、体积小、重量轻的特点，因此倍受大家青睐，成为显示器的主流。目前液晶显示器是以薄膜晶体管(Thin Film Transistor，TFT)液晶显示器为主。
通常液晶显示器包括液晶面板以及贴附在液晶面板的外表面的上下偏光片，用以形成偏振光并控制光线的通过与否。通常偏光片包括依次层叠设置的离型膜(release film)、粘着剂层、第一保护层、偏光膜、第二保护层及表面保护膜。在将偏光片直接贴附在液晶面板之前，从偏光片除去离型膜以将粘着剂层贴附至液晶面板上，并在贴附偏光片后除去表面保护膜。
现有的偏光片一般只有42％的透过率，并且由于偏光片的表面反光现象，如果是在环境光很强的情况下，会使显示器的可读性变差。若要提高显示器的亮度，一般采用提高背光亮度的方法，但是这样会提高背光的能耗。
发明内容
鉴于现有技术存在的不足，本发明提供了一种偏光片以及包含该偏光片的液晶面板，通过改进偏光片的结构，减少偏光片对外界环境光的反射，使显示器的对比度得以提高，也提高了显示器在强光环境下的可读性。
为了实现上述目的，本发明采用了如下的技术方案：
一种偏光片，包括偏光片基材，其中，所述偏光片基材上设置有多个凸起的微结构，所述微结构包括两层以上的光或热固化树脂材料。
其中，每一层光或热固化树脂材料单独地选自聚对苯二甲酸乙二醇酯、聚甲基丙酸甲酯、聚碳酸酯或聚苯乙烯中的任意一种。
其中，所述微结构呈长条状，多个长条状的微结构沿所述偏光片基材的横向或纵向排列。
其中，所述微结构呈凸点状，多个凸点状的微结构阵列分布于所述偏光片基材上。
其中，所述微结构的宽度为50nm～200nm，相邻两个微结构的间距为50nm～200nm。
其中，所述偏光片基材包括叠层设置的第一保护膜、偏光膜以及第二保护膜，所述微结构设置设置于所述第二保护膜上。
如上所述的偏光片的制备方法，其包括步骤：提供一偏光片基材并在该偏光片基材上涂布两层以上的光或热固化树脂材料；对所述光或热固化树脂材料施加多个光照点或加热点，使得该光或热固化树脂材料以所述多个光照点或加热点为中心收缩，形成多个凸起的微结构。
其中，若干个光照点或加热点在沿所述偏光片基材的纵向或横向方向上连成一光照线或加热线，并且在所述偏光片基材排列有多条所述光照线或加热线，所述光或热固化树脂材料以所述多个光照线或加热线为中心收缩，形成多个长条状的微结构。
其中，所述多个光照点或加热点呈阵列分布地施加于所述光或热固化树脂材料上，所述光或热固化树脂材料以所述多个光照点或加热点为中心收缩，形成阵列分布的凸点状的微结构。
本发明的另一方面是提供一种液晶面板，包括相对设置的薄膜晶体管基板和彩色滤光基板以及位于所述薄膜晶体管基板和彩色滤光基板之间的液晶层，所述薄膜晶体管基板上连接有第一偏光片，所述彩色滤光基板上连接有第二偏光片，其中，至少所述第二偏光片采用如上所述的偏光片。
相比于现有技术，本发明实施例中，通过对位于液晶面板出光面的偏光片的结构进行改进，主要是在偏光片中增加了一微结构层，该微结构对外界环境光折射和散射，减少了反射，使显示器的对比度得以提高，也提高了显示器在强光环境下的可读性。另外，微结构层对出射的背光反射和折射等形成漫反射， 改善出射光线的均匀性，增加了液晶面板在大视角下的对比度和清晰度。
附图说明
图1是本发明实施例1中的偏光片的结构示意图。
图2a-图2d是本发明实施例1中的偏光片的制备方法的示例性图示。
图3是本发明实施例2中的偏光片的结构示意图。
图4a-图4d是本发明实施例2中的偏光片的制备方法的示例性图示。
图5是本发明实施例3中的液晶显示器的结构示意图。
图6是本发明实施例3中的液晶面板的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行详细地描述，显然，所描述的实施例仅仅是本发明一部分实例，而不是全部实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护范围。
实施例1
本实施例首先提供了一种偏光片，如图1所示，该偏光片包括偏光片基材1以及设置于偏光片基材1上的多个凸起的微结构2。具体地，所述偏光片基材1包括叠层设置的第一保护膜1a、偏光膜1b以及第二保护膜1c，所述微结构2设置设置于所述第二保护膜1c上。所述微结构2呈凸点状，多个凸点状的微结构2阵列分布于所述偏光片基材1上。
其中，所述微结构2包括三层光或热固化树脂材料2a、2b、2c。每一层光或热固化树脂材料2a、2b、2c单独地选自聚对苯二甲酸乙二醇酯、聚甲基丙酸甲酯、聚碳酸酯或聚苯乙烯中的任意一种。对于光或热固化树脂材料的层数，只要选择为两层以上即可。
其中，偏光膜1b的材料为聚乙烯醇(Polyvinyl alcohol，PVA)；第一保护膜1a和第二保护膜1c的材料均为三醋酸纤维素(Triacetyl Cellulose，TAC)，TAC保护膜1a、1c的主要是用于保护PVA偏光膜1b，以提升PVA偏光膜1b的机械性能，防止PVA偏光膜1b收缩。
参阅附图2a-图2d,如上的偏光片的制备方法包括步骤：
S11、提供一偏光片基材1，如图2a所示。
S12、在偏光片基材1上依次涂布三层光或热固化树脂材料2a、2b、2c，如图2b所示。
S13、采用多个光照点或加热点3呈阵列分布地施加于光或热固化树脂材料2a、2b、2c上，如图2c所示；由此，光或热固化树脂材料2a、2b、2c以多个光照点或加热点3为中心收缩，形成阵列分布的凸点状的微结构2，如图2d所示。
其中，凸点状的微结构2的具体形状，主要由所选择的光或热固化树脂材料2a、2b、2c的光或热收缩率决定。例如，当三层光或热固化树脂材料2a、2b、2c选用相同的材料时，三层材料的光或热收缩率相同，最终得到的微结构2呈圆柱形。在本实施例中，三层材料的光或热收缩率从下到上逐渐增大，最终得到的微结构2呈上小下大的形状。进一步地，所述微结构2的宽度为50nm～200nm，相邻两个微结构2的间距为50nm～200nm。
如上提供的偏光片中，增加了一微结构层，该微结构对外界环境光折射和散射，减少了反射，使显示器的对比度得以提高，也提高了显示器在强光环境下的可读性。
实施例2
本实施例提供了另一种偏光片，如图3所示，该偏光片包括偏光片基材1以及设置于偏光片基材1上的多个凸起的微结构2。具体地，所述偏光片基材1包括叠层设置的第一保护膜1a、偏光膜1b以及第二保护膜1c，所述微结构2设置设置于所述第二保护膜1c上。所述微结构2呈长条状，多个长条状的微结构2沿偏光片基材1的横向或纵向排列。
其中，所述微结构2包括两层光或热固化树脂材料2a、2b。每一层光或热固化树脂材料2a、2b单独地选自聚对苯二甲酸乙二醇酯、聚甲基丙酸甲酯、聚碳酸酯或聚苯乙烯中的任意一种。对于光或热固化树脂材料的层数，只要选择为两层以上即可。
其中，偏光膜1b的材料为聚乙烯醇(Polyvinyl alcohol，PVA)；第一保护膜1a和第二保护膜1c的材料均为三醋酸纤维素(Triacetyl Cellulose，TAC)， TAC保护膜1a、1c的主要是用于保护PVA偏光膜1b，以提升PVA偏光膜1b的机械性能，防止PVA偏光膜1b收缩。
参阅附图4a-图4c,如上的偏光片的制备方法包括步骤：
S21、提供一偏光片基材1，如图4a所示。
S22、在偏光片基材1上依次涂布两层光或热固化树脂材料2a、2b，如图4b所示。
S23、采用多个光照点或加热点3施加于光或热固化树脂材料2a、2b、2c上，其中，若干个光照点或加热点3在沿偏光片基材1的第一方向(本实施例中为纵向)上连成一光照线或加热线3X，并且在偏光片基材1的第二方向上排列有多条所述光照线或加热线3X，如图4c所示的。所述光或热固化树脂材料2a、2b以所述多个光照线或加热线3X为中心收缩，形成多个长条状的微结构2，如图4d所示。
其中，长条状的微结构2在其高度方向上的具体形状，主要由所选择的光或热固化树脂材料2a、2b的光或热收缩率决定。例如，当两层光或热固化树脂材料2a、2b选用相同的材料时，两层材料的光或热收缩率相同，最终得到的微结构2呈方形长条状。在本实施例中，下层材料的光或热收缩率小于上层材料的光或热收缩率，最终得到的微结构2在其高度方向上呈上小下大的形状。进一步地，所述微结构2的宽度为50nm～200nm，相邻两个微结构2的间距为50nm～200nm。
如上提供的偏光片中，增加了一微结构层，该微结构对外界环境光折射和散射，减少了反射，使显示器的对比度得以提高，也提高了显示器在强光环境下的可读性。
实施例3
如图5所示，本实施例了一种液晶显示器，其包括液晶面板100及背光模组200，液晶面板100与背光模组200相对设置，背光模组200提供显示光源给液晶面板100，以使液晶面板100显示影像。
其中，如图6所示，液晶面板100包括相对设置的薄膜晶体管(TFT)基板10和彩色滤光(CF)基板20以及位于薄膜晶体管基板10和彩色滤光基板20之间的液晶层30，所述薄膜晶体管基板10上连接有第一偏光片40，所述彩色滤光基板 20上连接有第二偏光片50。其中，至少位于出光面上的第二偏光片50采用实施例1或实施例2所提供的偏光片。
位于出光面上的第二偏光片50采用实施例1或实施例2所提供的偏光片，偏光片中的微结构对外界环境光折射和散射，减少了反射，使显示器的对比度得以提高，也提高了显示器在强光环境下的可读性。另外，微结构层对出射的背光反射和折射等形成漫反射，改善出射光线的均匀性，增加了液晶面板在大视角下的对比度和清晰度。位于入光面上的第一偏光片40可采用传统的偏光片，也可以选择采用实施例1或实施例2所提供的偏光片，当采用采用实施例1或实施例2所提供的偏光片时，其可以使得入射的光线更加均匀，进一步提高了液晶显示器的显示品质。
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上所述仅是本申请的具体实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。

Claims (20)

  1. 一种偏光片，包括偏光片基材，其中，所述偏光片基材上设置有多个凸起的微结构，所述微结构包括两层以上的光或热固化树脂材料。
  2. 根据权利要求1所述的偏光片，其中，每一层光或热固化树脂材料单独地选自聚对苯二甲酸乙二醇酯、聚甲基丙酸甲酯、聚碳酸酯或聚苯乙烯中的任意一种。
  3. 根据权利要求2所述的偏光片，其中，所述微结构呈长条状，多个长条状的微结构沿所述偏光片基材的横向或纵向排列。
  4. 根据权利要求3所述的偏光片，其中，所述微结构的宽度为50nm～200nm，相邻两个微结构的间距为50nm～200nm。
  5. 根据权利要求2所述的偏光片，其中，所述微结构呈凸点状，多个凸点状的微结构阵列分布于所述偏光片基材上。
  6. 根据权利要求5所述的偏光片，其中，所述微结构的宽度为50nm～200nm，相邻两个微结构的间距为50nm～200nm。
  7. 根据权利要求1所述的偏光片，其中，所述偏光片基材包括叠层设置的第一保护膜、偏光膜以及第二保护膜，所述微结构设置设置于所述第二保护膜上。
  8. 一种偏光片的制备方法，其中，包括步骤：
    提供一偏光片基材并在该偏光片基材上涂布两层以上的光或热固化树脂材料；
    对所述光或热固化树脂材料施加多个光照点或加热点，使得该光或热固化树脂材料以所述多个光照点或加热点为中心收缩，形成多个凸起的微结构。
  9. 根据权利要求8所述的偏光片的制备方法，其中，每一层光或热固化树脂材料单独地选自聚对苯二甲酸乙二醇酯、聚甲基丙酸甲酯、聚碳酸酯或聚苯乙烯中的任意一种。
  10. 根据权利要求9所述的偏光片的制备方法，其中，若干个光照点或加热点在沿所述偏光片基材的纵向或横向方向上连成一光照线或加热线，并且在所 述偏光片基材上排列有多条所述光照线或加热线，所述光或热固化树脂材料以所述多个光照线或加热线为中心收缩，形成多个长条状的微结构。
  11. 根据权利要求9所述的偏光片的制备方法，其中，所述多个光照点或加热点呈阵列分布地施加于所述光或热固化树脂材料上，所述光或热固化树脂材料以所述多个光照点或加热点为中心收缩，形成阵列分布的凸点状的微结构。
  12. 根据权利要求8所述的偏光片的制备方法，其中，所述微结构的宽度为50nm～200nm，相邻两个微结构的间距为50nm～200nm。
  13. 根据权利要求8所述的偏光片的制备方法，其中，所述偏光片基材包括叠层设置的第一保护膜、偏光膜以及第二保护膜，所述微结构设置设置于所述第二保护膜上。
  14. 一种液晶面板，包括相对设置的薄膜晶体管基板和彩色滤光基板以及位于所述薄膜晶体管基板和彩色滤光基板之间的液晶层，所述薄膜晶体管基板上连接有第一偏光片，所述彩色滤光基板上连接有第二偏光片，其中，至少所述第二偏光片采用如下结构的偏光片，该偏光片包括偏光片基材，其中，所述偏光片基材上设置有多个凸起的微结构，所述微结构包括两层以上的光或热固化树脂材料。
  15. 根据权利要求14所述的液晶面板，其中，每一层光或热固化树脂材料单独地选自聚对苯二甲酸乙二醇酯、聚甲基丙酸甲酯、聚碳酸酯或聚苯乙烯中的任意一种。
  16. 根据权利要求15所述的液晶面板，其中，所述微结构呈长条状，多个长条状的微结构沿所述偏光片基材的横向或纵向排列。
  17. 根据权利要求16所述的液晶面板，其中，所述微结构的宽度为50nm～200nm，相邻两个微结构的间距为50nm～200nm。
  18. 根据权利要求15所述的液晶面板，其中，所述微结构呈凸点状，多个凸点状的微结构阵列分布于所述偏光片基材上。
  19. 根据权利要求18所述的液晶面板，其中，所述微结构的宽度为50nm～200nm，相邻两个微结构的间距为50nm～200nm。
  20. 根据权利要求14所述的液晶面板，其中，所述偏光片基材包括叠层设置的第一保护膜、偏光膜以及第二保护膜，所述微结构设置设置于所述第二保 护膜上。
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