WO2013102377A1 - 聚光膜及其制造方法、背光模组和液晶显示面板 - Google Patents

聚光膜及其制造方法、背光模组和液晶显示面板 Download PDF

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Publication number
WO2013102377A1
WO2013102377A1 PCT/CN2012/084913 CN2012084913W WO2013102377A1 WO 2013102377 A1 WO2013102377 A1 WO 2013102377A1 CN 2012084913 W CN2012084913 W CN 2012084913W WO 2013102377 A1 WO2013102377 A1 WO 2013102377A1
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WO
WIPO (PCT)
Prior art keywords
material layer
light
panel
liquid crystal
film
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PCT/CN2012/084913
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English (en)
French (fr)
Inventor
秦广奎
柳在健
铃木照晃
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京东方科技集团股份有限公司
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Publication of WO2013102377A1 publication Critical patent/WO2013102377A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/202—LCD, i.e. liquid crystal displays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0056—Means for improving the coupling-out of light from the light guide for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing 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
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • G02F1/133507—Films for enhancing the luminance

Definitions

  • Embodiments of the present invention relate to a light collecting film, a method of manufacturing the same, a backlight module, and a liquid crystal display panel. Background technique
  • a backlight module of a liquid crystal display panel of the prior art is generally composed of a light source, a light guide plate, an optical film, and other parts.
  • the backlight module should have high brightness, light-emitting hooks, large illumination angles, and light weight and thin thickness.
  • the optical film is generally designed in various aspects to ensure the performance of the backlight module, such as a prism film disposed on the light guide plate, and the prism film is used to gather the light of the backlight at a small angle. Injecting within the range, or using a reflective polarizing brightening film, the reflective polarizing brightening film is composed of two different high and low refractive index materials to form a multilayer film, which is used to reflect the light of the light source multiple times, as much as possible Light is emitted to the LCD panel.
  • the optical filming effect of the optical film in the prior art is still limited, and the utilization of the light source cannot be improved, so that the brightness of the liquid crystal display panel cannot meet the requirements of some high performance products. Summary of the invention
  • An embodiment of the present invention provides a light concentrating film, comprising: a panel in which at least one layer of a first material layer and at least one layer of a second material are superposed, the first material layer being an anisotropic material; In at least one direction in a plane of the panel, the refractive indices of the at least one first material layer and the at least one second material layer are equal; in a direction perpendicular to the panel, the at least one layer The refractive indices of one material layer and the at least one second material layer are not equal.
  • Another embodiment of the present invention provides a backlight module including the above-mentioned light collecting film.
  • Yet another embodiment of the present invention provides a liquid crystal display panel including the above backlight module.
  • a further embodiment of the present invention provides a method of fabricating a light-concentrating film, comprising: alternately stacking at least one first material layer and at least one second material layer, the first material layer being an anisotropic material; And superimposing at least one layer of the first material layer and the at least one layer of the second material laminated to form a panel, and causing the at least one first material layer and the at least one second material layer to be in a plane of the panel.
  • the refractive indices in at least one of the directions are equal and the refractive indices in the direction perpendicular to the panel are not equal.
  • FIG. 1 is a schematic structural view of a light collecting film according to an embodiment of the present invention.
  • FIG. 2 is a schematic view of light incident on a light collecting film provided by an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a backlight module according to an embodiment of the present invention. detailed description
  • Embodiments of the present invention provide a concentrating film, a backlight module, and a liquid crystal display panel, which can improve the utilization ratio of the light source, reduce the diffusion angle of light incident on the liquid crystal display panel, and thereby improve the brightness of the liquid crystal display panel.
  • the embodiment of the present invention provides a concentrating film 10.
  • the concentrating film includes a first material layer 11 and a second material layer 12, and the first material layer 11 and the second material layer 12 are formed.
  • the stacking is sequentially formed to form a panel shape, and the concentrating film 10 may include only one layer of the first material layer 11 and the second material layer 12.
  • the concentrating film 10 may further include a plurality of layers of the first material layer 11 and the plurality of layers of the second material layer alternately stacked with each other. 12.
  • the first material layer 11 and the second material layer 12 are sequentially stacked in sequence, as shown in FIG.
  • the first material layer 11 is an anisotropic material, for example, a triacetyl cellulose (TAC) material, a liquid crystal polymer material of a Nematic Vertical Liquid Crystal Polymer (NV) structure, or a poly Naphthalene naphthalate (PEN) material.
  • the second material layer 12 may be an anisotropic material or an isotropic material. If the second material layer 12 is an anisotropic material, for example, it may be a TAC material or a liquid crystal polymer material of an NV structure;
  • the layer is an isotropic material, such as polyethylene naphthalate (CoPEN) material.
  • the first material layer 11 and the second material layer 12 are stacked to form a panel, it is also necessary to ensure that the first material layer 11 and the second material layer 12 have the same refractive index in at least one direction in the plane of the panel.
  • the refractive indices of the first material layer 11 and the second material layer 12 are equal in at least one of the planes formed by the first direction X and the second direction Y (ie, the XY plane).
  • the first material layer 11 and the second material layer 12 have equal refractive indices in one direction only in the XY plane.
  • the direction is the same as the polarization direction of the polarizing plate on the liquid crystal display panel.
  • the first material layer 11 and the second material layer 12 may also have equal refractive indices in the XY plane, that is, the first material layer 11 and the second material layer 12 are in any direction in the XY plane.
  • the refractive indices of the first material layer 11 and the second material layer 12 are not equal, that is, " ⁇ 3 ⁇ 4 2 , used to make the polarized light non-first material layer 11 and the second as possible.
  • Light rays in the direction in which the refractive index of the material layer 12 is equal are reflected to the scattering film, thereby improving the utilization of light, as shown in FIG.
  • the concentrating film 10 provided by the embodiment of the present invention can be fabricated by first stacking the first material layer 11 onto the second material layer 12, and the superimposing may be applying the first material layer 11 to the second layer.
  • the first material layer 11 is an anisotropic material such as TAC, NV or PEN
  • the second material layer 12 may be an anisotropic material or an isotropic material.
  • the first material 11 layer and the second material layer 12 are then pressed into a panel to form a light-concentrating film 10.
  • the light-concentrating film 10 may also be a light-concentrating film formed by pressing a plurality of layers of the first material layer 11 and the plurality of second material layers 12.
  • the first material layer 11 and the second material layer 12 have the same refractive index in at least one direction in the plane of the light collecting film 10, or the first material layer in any one of the planes of the light collecting film 10 11 and the second material layer 12 have the same refractive index.
  • the first material layer 11 and the second material layer 12 in a direction perpendicular to a plane in which the light collecting film 10 is located The refractive indices are not equal. As shown in FIG. 1, the refractive index of the first material layer 11 and the second material layer 12 are equal in the X direction or the Y direction, or in any direction except the X direction and the Y direction in the XY plane, and in the Z direction.
  • the refractive indices of the first material layer 11 and the second material layer 12 are not equal. Alternatively, the refractive indices of the first material layer 11 and the second material layer 12 are equal in any direction in the XY plane, and the refractive indices of the first material layer 11 and the second material layer 12 are not equal in the Z direction. .
  • the first material layer 11 is an anisotropic material and the second material layer 12 is an isotropic material.
  • the refractive index of the second material layer 12 of the isotropic material is constant in all directions, and the first of the anisotropic materials
  • the refractive index of the material layer 11 will change.
  • the light-concentrating film 10 can be formed by pressing the first material layer 11 and the second material layer 12 to form a panel, which can then be oriented in a certain direction. Stretching the panel, by controlling the direction and length of the stretch panel, so that the first material layer 11 and the second material layer 12 can be oriented in a certain direction in the plane of the panel or in any direction in the plane
  • the upper refractive index is equal.
  • the refractive indices of the first material layer 11 and the second material layer 12 on the XY plane are equal, as shown in FIG. 2, when the light rays 21 are perpendicularly incident to the light collecting film 10, the polarization plane of the light rays 21 is on the XY plane. Since the refractive indices of the first material layer 11 and the second material layer 12 in any direction in the XY plane are equal, the light rays 21 can be transmitted through the light-concentrating film 10 to be incident on the liquid crystal panel.
  • a layer of material that the refracted ray 25 propagates to the concentrating film 10 may be reflected back, such as the reflected light line 26.
  • the light that is reflected onto the scattering film of the backlight module may be incident on the liquid crystal display panel by the light that is scattered in the XY plane.
  • the light beams of the panel formed by the non-normally incident to the first material layer 11 and the second material layer 12 are reused again by multiple scattering and reflection, thereby improving the utilization of the incident light and the brightness of the liquid crystal display panel.
  • the first material layer 11 and the second material layer 12 have the same refractive index in the X direction, as shown in FIG. 2
  • the plane of polarization of the incident ray 21 is perpendicular to the plane of the incident ray 22, that is, the XY plane, so that the X-direction polarized light of the incident ray 22 on the plane of polarization is directly transmitted.
  • the X direction coincides with, for example, the polarization direction of the polarizing plate on the liquid crystal display panel.
  • the refractive indices of the first material layer 11 and the second material layer 12 are only equal in the X direction
  • the plane of polarization of the incident ray 22 is perpendicular to the incidence.
  • the plane of the ray 22 since the refractive indices of the first material layer 11 and the second material layer 12 are only equal in the X direction, and the refractive indices in the Y direction and the Z direction are not equal, the obliquely incident ray 22 may be reflected as shown in the figure.
  • the concentrating film structure allows X-polarized light of normal incident light to be incident on the liquid crystal display panel, the utilization of incident light can be further improved, the scattering angle of the light is reduced, and the brightness of the liquid crystal display panel is improved.
  • the first material layer 11 and the second material layer 12 have at least a plane on the plane of the panel in which the first material layer 11 and the second material layer 12 are superposed.
  • the refractive index in one direction is equal, and the light obliquely incident on the condensing film can be reused after being reflected by the condensing film.
  • the light incident perpendicularly to the concentrating film may be incident on the liquid crystal display panel, and if the first material layer 11 and the second material layer 12 have the same refractive index in only one direction, the normal incident light is only in the first material layer.
  • the polarized light in the direction in which the refractive indices of the second material layer 12 and the second material layer 12 are equal may be incident on the liquid crystal display panel such that the scattering angle of the incident light is smaller, so that the brightness of the liquid crystal display panel can be improved.
  • the embodiment of the invention further provides a backlight module, as shown in FIG. 3, including a backlight module body
  • the backlight module can also be used for a direct-lit backlight. Regardless of the direct type backlight and the side-in type backlight, after the light source 35 emits light, the light is incident on the scattering film 34 through the light guide plate 33. After the light is scattered by the scattering film 34, it is incident on the poly Light film 10. The propagation process of the specific light in the backlight module will not be described here.
  • the concentrating film 10 is directly formed on the scattering film 34 in the embodiment shown in Fig. 3, the embodiment of the invention is not limited thereto.
  • the backlight module of the embodiment of the invention may further comprise one or more prism films between the diffusing film 34 and the concentrating film 10.
  • the concentrating film 10 on the plane of the panel in which the first material layer 11 and the second material layer 12 of the concentrating film 10 are superposed, since the first material layer 11 and the second material layer 12 have the same refractive index in at least one direction, The light incident on the concentrating film can be reused after being emitted by the concentrating film.
  • the light rays incident perpendicularly to the light collecting film may be incident on the liquid crystal display panel 36 through the light collecting film, and if the first material layer 11 and the second material layer 12 have the same refractive index in only one direction, the normal incidence Only the polarized light of the light in the direction in which the refractive indices of the first material layer 11 and the second material layer 12 are equal can be incident on the liquid crystal display panel, so that the scattering angle of the incident light is made smaller, so that the brightness of the liquid crystal display panel can be improved.
  • the embodiment of the present invention further provides a liquid crystal display panel, which includes the backlight module provided in the above embodiments.
  • the specific structure is not described herein.
  • a concentrating film comprising: a panel in which at least one layer of a first material layer and at least one layer of a second material are superposed, the first material layer being an anisotropic material; and in a plane of the panel In at least one direction, the at least one first material layer and the at least one second material layer have equal refractive indices; in a direction perpendicular to the panel, the at least one first material layer and The refractive indices of the at least one second material layer are not equal.
  • a backlight module comprising the concentrating film of any one of (1) to (3).
  • a liquid crystal display panel comprising the backlight module of (4).
  • a method of manufacturing a concentrating film comprising:
  • the refractive indices in at least one direction on the plane of the panel are equal and the refractive indices in the direction perpendicular to the panel are not equal.
  • the first material layer and the first material layer are at least on a plane where the first material layer and the second material layer are stacked There is an equal refractive index in one direction. Light that is obliquely incident on the concentrating film can be reused after being reflected by the concentrating film.
  • the first material layer and the second material layer have equal refractive indices in only one direction on the plane of the panel, then the normal incident ray is only in the first material layer and the second
  • the polarized light in the direction in which the refractive indices of the material layers are equal can be incident on the liquid crystal display panel such that the scattering angle of the incident light is smaller, so that the brightness of the liquid crystal display panel can be improved.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Laminated Bodies (AREA)

Abstract

提供了聚光膜（10）及其制造方法、背光模组和液晶显示面板，能够提高光源的利用率，减小入射至液晶显示面板光线的扩散角度，从而提高液晶显示面板的亮度。该聚光膜（10）包括：至少一层第一材料层（11）和至少一层第二材料层（12）交替层叠而成的面板，所述第一材料层（11）是各向异性材料；且在所述面板的平面内的至少一个方向，所述至少一层第一材料层（11）和所述至少一层第二材料层（12）的折射率相等；在垂直所述面板的方向上，所述至少一层第一材料层（11）和所述至少一层第二材料层（12）的折射率不相等。

Description

聚光膜及其制造方法、 背光模组和液晶显示面板 技术领域
本发明的实施例涉及聚光膜及其制造方法、 背光模组和液晶显示面板。 背景技术
现有技术中的液晶显示面板的背光模组， 通常由光源、 导光板和光学膜 片及其它部分组成。 为了确保显示画面的质量， 背光模组应具有亮度高、 发 光均勾和照明角度大和质量轻厚度薄等性能。
现有技术中的背光模组中通常对光学膜片作多方面设计来保证背光模组 的性能， 如在导光板上设置棱镜膜， 棱镜膜用于将背光源的光线聚拢在较小 的角度范围内射出， 或者釆用反射型偏光增亮膜， 反射型偏光增亮膜利用两 种不同高低折射率的材料组成多层膜， 用于将光源的光线经过多次反射， 尽 可能将光源的光线发射至液晶面板。 但是现有技术中的光学膜片的光线聚合 效果还是有限， 无法提高到光源的利用率， 从而使得液晶显示面板的亮度不 能满足一些高性能产品的要求。 发明内容
本发明的一个实施例提供聚光膜， 包括： 至少一层第一材料层和至少一 层第二材料交替层叠加而成的面板， 所述第一材料层是各向异性材料； 且在 所述面板的平面内的至少一个方向上， 所述至少一层第一材料层和所述至少 一层第二材料层的折射率相等； 在垂直所述面板的方向上， 所述至少一层第 一材料层和所述至少一层第二材料层的折射率不相等。
本发明的另一实施例提供背光模组， 包括上述聚光膜。
本发明的又一实施例提供液晶显示面板， 包括上述背光模组。
本发明的又一实施例提供聚光膜的制造方法， 包括： 交替叠加至少一层 第一材料层和至少一层第二材料层， 所述第一材料层是各向异性材料； 将所 述相互叠加的至少一层第一材料层和至少一层第二材料层压附形成面板， 并 使得所述至少一层第一材料层和所述至少一层第二材料层在所述面板的平面 上的至少一个方向的折射率相等且在与所述面板垂直的方向的折射率不等。 附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对实施例或现有技 术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 仅仅涉及本发明的一些实施例， 并非对本发明的限制。
图 1为本发明实施例提供的一种聚光膜的结构示意图；
图 2为光线入射至本发明实施例提供的聚光膜的示意图；
图 3为本发明实施例提供的一种背光模组的结构示意图。 具体实施方式
本发明的实施例提供一种聚光膜、 背光模组和液晶显示面板， 能够提高 光源的利用率， 减少入射至液晶显示面板的光线的扩散角度， 从而提高液晶 显示面板的亮度。
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 清楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而 不是全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没有做 出创造性劳动前提下所获得的所有其他实施例， 都属于本发明保护的范围。
本发明实施例提供了一种聚光膜 10, 如图 1、 2所示， 该聚光膜包括第 一材料层 11和第二材料层 12, 由第一材料层 11和第二材料层 12顺序叠加 形成面板形状，该聚光膜 10可以只包括一层第一材料层 11和第二材料层 12。 为了能够尽可能的将非垂直于聚光膜 10 的入射光线反射至背光模组的散射 膜， 聚光膜 10还可以包括相互交替堆叠的多层第一材料层 11和多层第二材 料层 12, 第一材料层 11和第二材料层 12依次顺序叠加， 如图 1所示。 其中 第一材料层 11 是各向异性材料， 例如可以是三乙酰纤维素 （Triacetyl cellulose, TAC )材料、 正性液晶聚合物薄膜 ( Nematic Vertical Liquid crystal polymer, NV )结构的液晶聚合物材料或聚萘二曱酸乙二醇酯（PEN )材料。 第二材料层 12 可以是各向异性材料也可以是各向同性材料， 若第二材料层 12是各向异性材料， 例如也可以是 TAC材料或者 NV结构的液晶聚合物材 料； 若第二材料层是各向同性材料， 例如可以是聚萘二曱酸乙二醇酯 ( CoPEN )材料。
该第一材料层 11和第二材料层 12叠加形成面板后， 还需要保证所述第 一材料层 11和第二材料层 12在所述面板的平面中的至少有一个方向上的折 射率相等。例如，如图 1所示，在第一方向 X与第二方向 Y构成的平面（即， XY平面） 中的至少有一个方向上， 第一材料层 11和第二材料层 12的折射 率相等。 在一个实施例中， 第一材料层 11和第二材料层 12在仅 XY平面内 的一个方向上的折射率相等。 该方向可以为 X向， 即^^" = ^12； 该方向可 以为 Y向， 即
Figure imgf000005_0001
= i2 ; 或者该方向可以是 χγ平面中的除了 X向和 γ 向之外的任一个方向。 例如， 该方向与液晶显示面板上的偏振片的偏振方向 相同。 在另一实施例中， 第一材料层 11和第二材料层 12也可以在 XY平面 上的折射率都相等， 即第一材料层 11和第二材料层 12在 XY平面内的任何 一个方向上的折射率都相等， 包括： m = ,
Figure imgf000005_0002
= l2。 但在垂直于 XY平面的方向上， 第一材料层 11和第二材料层 12的折射 率不相等， 即， "≠ ¾2 , 用于尽可能将偏振光非第一材料层 11和第二材 料层 12折射率相等的方向的光线反射至散射膜，从而提高光线的利用率，如 图 1所示。
本发明实施例提供的聚光膜 10可以釆用以下方法进行制作：首先将第一 材料层 11堆叠到第二材料层 12上，所述叠加可以是将第一材料层 11涂覆在 第二材料层 12上， 其中第一材料层 11是各向异性材料， 例如 TAC、 NV或 PEN等材料， 第二材料层 12可以是各向异性材料也可以是各向同性材料。 然后将第一材料 11层和第二材料层 12压附成面板， 形成聚光膜 10。 为了提 高聚光膜对光源的利用率， 聚光膜 10还可以通过压附多层第一材料层 11和 多层第二材料层 12而形成的聚光膜。第一材料层 11和第二材料层 12在该聚 光膜 10所在平面内的至少一个方向上的折射率相等， 或者在该聚光膜 10所 在平面中的任意一个方向上，第一材料层 11和第二材料层 12的折射率相等。 在垂直于所述聚光膜 10所在平面的方向上，第一材料层 11和第二材料层 12 的折射率不相等。 如图 1所示， 在 X向或 Y向上， 或者 XY平面内的除了 X 向和 Y向的任何一个方向上，第一材料层 11和第二材料层 12的折射率相等， 而在 Z向上， 第一材料层 11和第二材料层 12的折射率不相等。 可替换地， 在 XY平面内的任意方向上，第一材料层 11和第二材料层 12的折射率相等， 而在 Z向上， 第一材料层 11和第二材料层 12的折射率不相等。
为了满足聚光膜对第一材料层 11和第二材料层 12在各个方向的折射率 的要求， 可以釆用下述方法来实现：
例如， 第一材料层 11是各向异性材料， 第二材料层 12釆用各向同性材 料。 在此情况下， 在对第一材料层 11和第二材料层 12拉伸时， 各向同性材 料的第二材料层 12在各个方向上的折射率不变，而各向异性材料的第一材料 层 11的折射率将发生改变。利用第一材料层 11和第二材料层 12的这种性质， 聚光膜 10可以如下形成：将第一材料层 11和第二材料层 12压附形成一面板， 然后可沿着某一方向对该面板进行拉伸， 通过控制拉伸面板的方向和长度， 从而可以使得第一材料层 11和第二材料层 12在所述面板所在平面内的某一 方向上或在该平面内的任意方向上的折射率相等。
当第一材料层 11和第二材料层 12在 X Y平面上的折射率相等时，如图 2所示，当光线 21垂直入射至聚光膜 10时，光线 21的偏振面在 XY平面上， 由于第一材料层 11和第二材料层 12在 XY平面内的任意方向上的的折射率 相等， 这样光线 21可以透射过聚光膜 10而入射至液晶面板。
当第一材料层 11和第二材料层 12在 XY平面上的折射率相等的情况下， 如图 2所示， 当光线 22非垂直入射至聚光膜 10时，入射光线 22的偏振面为 垂直于该入射光线 22的平面， 由于第一材料层 11和第二材料层在 Z向上的 折射率不相等，所以在入射光线 22的偏振光一部分被反射回来，如图 2所示 的反射光线 23、 24。 还有一部分折射至聚光膜中的下一层， 如折射光线 25。 该折射光线 25传播至聚光膜 10的某一材料层可能又被反射回来， 如反射光 线 26。 被反射至背光模组的散射膜上的光线， 经过散射部分光线可能会变为 垂直于 XY平面的光线而入射至液晶显示面板。 这样非垂直入射至第一材料 层 11和第二材料层 12形成的面板的光线经过多次散射和反射再次被回收利 用， 从而可以提高入射光线的利用率和液晶显示面板的亮度。
当第一材料层 11和第二材料层 12仅在 X向上的折射率相等时， 如图 2 所示的光线 21垂直入射至聚光膜 10时，入射光线 21的偏振面为垂直于该入 射光线 22的平面， 即 XY平面， 这样入射光线 22在偏振面上的 X向的偏振 光直接透射至液晶显示面板， X向例如与液晶显示面板上的偏振片的偏振方 向一致。
当第一材料层 11和第二材料层 12仅在 X向上的折射率相等时， 如图 2 所示的光线 22倾斜入射至聚光膜 10时，入射光线 22的偏振面为垂直于该入 射光线 22的平面， 由于第一材料层 11和第二材料层 12只在 X向的折射率 相等， 在 Y向和 Z向的折射率不相等， 所以倾斜入射的光线 22可能被反射， 如图 2所示的反射光线 23、 24; 还有可能被折射至聚光膜 10的某一层， 如 折射光线 25, 而折射光线 25在聚光膜 10中传播时可能被再次反射， 如反射 光线 26。 被反射至背光模组的散射膜上的光线， 经过散射部分光线可能会变 为垂直于 X Y平面的光线入射至液晶显示面板。这样非垂直入射至第一材料 层 11和第二材料层 12形成的面板的光线经过多次散射和反射再次被回收利 用。由于该聚光膜结构允许垂直入射光线的 X向偏振光入射至液晶显示面板， 这样可以进一步提高入射光线的利用率， 减小光线的散射角度， 提高液晶显 示面板的亮度。
本发明实施例提供的聚光膜 10, 由于在第一材料层 11和第二材料层 12 叠加而成的面板所在平面上， 第一材料层 11和第二材料层 12在该平面上至 少有一个方向的折射率相等， 对于倾斜入射至聚光膜的光线， 被聚光膜反射 后可以重复利用。对于垂直入射至聚光膜的光线，可以入射至液晶显示面板， 且若第一材料层 11和第二材料层 12只有一个方向的折射率相等， 那么该垂 直入射光线只有在该第一材料层 11和第二材料层 12的折射率相等的方向上 的偏振光可以入射至液晶显示面板， 使得入射光的散射角度更小， 从而可以 提高液晶显示面板的亮度。
本发明实施例还提供了一种背光模组， 如图 3所示， 包括背光模组主体
31、依次设置在背光模组主体 31内的反射板 32、导光板 33和散射膜 34, 以 及设置在散射膜 34上的聚光膜 10,该聚光膜 10为上述实施例中提供的聚光 膜。 尽管图 3中示例性给出了侧入式背光源， 但是该背光模组也可以用于直 下式背光源。 不管是直下式背光源和侧入式背光源， 光源 35发出光线后， 经 过导光板 33将光线入射至散射膜 34。 光线经过散射膜 34散射后， 入射至聚 光膜 10。 具体的光线在该背光模组中的传播过程在此不再赘述。
此外， 尽管图 3所示的实施例中， 聚光膜 10直接形成在散射膜 34上， 但是本发明的实施例并不以此为限制。 本发明实施例的背光模组还可以在散 射膜 34和聚光膜 10之间包括一层或多层棱镜膜。
本发明实施例提供的背光模组， 该背光模组包括上述实施例中的聚光膜
10,聚光膜 10的第一材料层 11和第二材料层 12叠加而成的面板所在平面上， 由于第一材料层 11和第二材料层 12至少有一个方向的折射率相等， 对于倾 斜入射至聚光膜的光线， 被聚光膜发射后可以重复利用。 对于垂直入射至聚 光膜的光线， 可以穿过该聚光膜而入射至液晶显示面板 36, 且若第一材料层 11和第二材料层 12只有一个方向的折射率相等， 那么该垂直入射光线只有 在该第一材料层 11和第二材料层 12的折射率相等的方向的偏振光可以入射 至液晶显示面板， 使得入射光的散射角度更小， 从而可以提高液晶显示面板 的亮度。
本发明实施例还提供了一种液晶显示面板， 包括上述实施例提供的背光 模组， 具体的结构在此不再赘述。
( 1 )聚光膜， 包括： 至少一层第一材料层和至少一层第二材料交替层叠 加而成的面板， 所述第一材料层是各向异性材料； 且在所述面板的平面内的 至少一个方向上， 所述至少一层第一材料层和所述至少一层第二材料层的折 射率相等； 在垂直所述面板的方向上， 所述至少一层第一材料层和所述至少 一层第二材料层的折射率不相等。
( 2 )根据（1 ) 的聚光膜， 其中， 所述至少一层第二材料层是各向异性 材料或各向同性材料。
( 3 )根据（1 )或（2 )的聚光膜， 其中， 在所述面板的平面上， 所述至 少一层第一材料层和所述至少一层第二材料层的折射率相等。
( 4 ) 背光模组， 包括（ 1 ) - ( 3 ) 中任一项的聚光膜。
( 5 )液晶显示面板， 包括（4 )所述的背光模组。
( 6 )聚光膜的制造方法， 包括：
交替叠加至少一层第一材料层和至少一层第二材料层， 所述第一材料层 是各向异性材料； 将所述相互叠加的至少一层第一材料层和至少一层第二材料层压附形成 面板， 并使得所述至少一层第一材料层和所述至少一层第二材料层在所述面 板的平面上的至少一个方向的折射率相等且在与所述面板垂直的方向的折射 率不等。
( 7 )根据（6 ) 的聚光膜的制造方法， 其中， 所述使得所述至少一层第 一材料层和所述至少一层第二材料层在所述面板的平面上的至少一个方向的 折射率相等且在与所述面板垂直的方向的折射率不等通过沿着某一方向对该 面板进行拉伸而实现。
在根据本发明实施例的聚光膜、 背光模组和液晶显示面板中， 由于在第 一材料层和第二材料层叠加而成的面板所在平面上， 第一材料层和第一材料 层至少有一个方向的折射率相等。 对于倾斜入射至聚光膜的光线， 被聚光膜 反射后可以重复利用。 对于垂直入射至聚光膜的光线， 若第一材料层和第二 材料层在所述面板所在平面上只有一个方向的折射率相等， 那么该垂直入射 光线只有在该第一材料层和第二材料层的折射率相等的方向的偏振光可以入 射至液晶显示面板， 使得入射光的散射角度更小， 从而可以提高液晶显示面 板的亮度。
虽然上文中已经用一般性说明及具体实施方式， 对本发明作了详尽的描 述， 但在本发明基础上， 可以对之作一些修改或改进， 这对本领域技术人员 而言是显而易见的。 因此， 在不偏离本发明精神的基础上所做的这些修改或 改进， 均属于本发明要求保护的范围。

Claims

权利要求书
1、 聚光膜， 包括： 至少一层第一材料层和至少一层第二材料交替层叠加 而成的面板， 所述第一材料层是各向异性材料； 且在所述面板的平面内的至 少一个方向上， 所述至少一层第一材料层和所述至少一层第二材料层的折射 率相等； 在垂直所述面板的方向上， 所述至少一层第一材料层和所述至少一 层第二材料层的折射率不相等。
2、根据权利要求 1所述的聚光膜， 其中， 所述至少一层第二材料层是各 向异性材料或各向同性材料。
3、根据权利要求 1或 2所述的聚光膜， 其中， 在所述面板的平面上， 所 述至少一层第一材料层和所述至少一层第二材料层的折射率相等。
4、 背光模组， 包括权利要求 1-3中任一项所述的聚光膜。
5、 液晶显示面板， 包括权利要求 4所述的背光模组。
6、 聚光膜的制造方法， 包括：
交替叠加至少一层第一材料层和至少一层第二材料层， 所述第一材料层 是各向异性材料；
将所述相互叠加的至少一层第一材料层和至少一层第二材料层压附形成 面板， 并使得所述至少一层第一材料层和所述至少一层第二材料层在所述面 板的平面上的至少一个方向的折射率相等且在与所述面板垂直的方向的折射 率不等。
7、根据权利要求 6的聚光膜的制造方法， 其中， 所述使得所述至少一层 第一材料层和所述至少一层第二材料层在所述面板的平面上的至少一个方向 的折射率相等且在与所述面板垂直的方向的折射率不等通过沿着某一方向对 该面板进行拉伸而实现。
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006235543A (ja) * 2005-02-28 2006-09-07 Sony Corp 反射偏光子およびその製造方法、反射偏光子の製造装置ならびに液晶表示装置
CN101036081A (zh) * 2004-10-01 2007-09-12 日东电工株式会社 包括背光并且前面板上包括有反射式偏振器的液晶显示器
CN101680990A (zh) * 2007-06-01 2010-03-24 帝人株式会社 相位差膜、叠层偏振光膜及液晶显示装置
CN102016659A (zh) * 2008-03-31 2011-04-13 3M创新有限公司 具有优化增益的较少层数反射型偏振器
CN102628968A (zh) * 2012-01-04 2012-08-08 京东方科技集团股份有限公司 一种聚光膜、背光模组和液晶显示面板

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MY131527A (en) * 1993-12-21 2007-08-30 Minnesota Mining & Mfg Reflective polarizer display
IL122245A0 (en) * 1995-06-26 1998-04-05 Minnesota Mining & Mfg Transparent multilayer device
WO2006011268A1 (ja) * 2004-07-23 2006-02-02 Hitachi Chemical Co., Ltd. 回折型集光フィルム及びそれを用いた面光源装置
TWI307012B (en) * 2005-11-17 2009-03-01 Via Tech Inc Idle state adjusting method and logical chip and computer system using the same
CN100454043C (zh) * 2005-12-16 2009-01-21 群康科技(深圳)有限公司 增亮膜、背光模组及液晶显示模组
WO2009022862A1 (en) * 2007-08-14 2009-02-19 Lg Chem, Ltd. Condensing film for lcd backlight unit
KR20110075126A (ko) * 2009-12-28 2011-07-06 엘지디스플레이 주식회사 횡전계 방식 액정표시장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101036081A (zh) * 2004-10-01 2007-09-12 日东电工株式会社 包括背光并且前面板上包括有反射式偏振器的液晶显示器
JP2006235543A (ja) * 2005-02-28 2006-09-07 Sony Corp 反射偏光子およびその製造方法、反射偏光子の製造装置ならびに液晶表示装置
CN101680990A (zh) * 2007-06-01 2010-03-24 帝人株式会社 相位差膜、叠层偏振光膜及液晶显示装置
CN102016659A (zh) * 2008-03-31 2011-04-13 3M创新有限公司 具有优化增益的较少层数反射型偏振器
CN102628968A (zh) * 2012-01-04 2012-08-08 京东方科技集团股份有限公司 一种聚光膜、背光模组和液晶显示面板

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