WO2014015634A1 - 显示面板及显示装置 - Google Patents

显示面板及显示装置 Download PDF

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Publication number
WO2014015634A1
WO2014015634A1 PCT/CN2012/087192 CN2012087192W WO2014015634A1 WO 2014015634 A1 WO2014015634 A1 WO 2014015634A1 CN 2012087192 W CN2012087192 W CN 2012087192W WO 2014015634 A1 WO2014015634 A1 WO 2014015634A1
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WIPO (PCT)
Prior art keywords
display panel
electrode
line
film
prism film
Prior art date
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PCT/CN2012/087192
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English (en)
French (fr)
Inventor
马晓峰
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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Publication of WO2014015634A1 publication Critical patent/WO2014015634A1/zh
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Classifications

    • 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
    • G02F1/136209—Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0018—Redirecting means on the surface of the light guide
    • 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
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the invention relates to a display panel and a display device. Background technique
  • liquid crystal display As an important flat panel display method, liquid crystal display has developed rapidly in the past ten years. It has the advantages of lightness, thinness and low energy consumption, and is widely used in modern information equipment such as televisions, computers, mobile phones and digital cameras.
  • the basic structure of the liquid crystal display is: backlight part (light source, light guide plate, various diffusion films, prism film, brightness enhancement film, etc.), lower polarizer, array substrate, liquid crystal layer (including liquid crystal guiding layer), color film Substrate, and upper polarizer (and compensation film, etc.).
  • the light emitted by the backlight enters the lower polarizer, passes through each layer and then exits from the upper polarizer. At this time, the brightness of the emitted light is only 7 to 8% or less of the incident light.
  • the transmittance of the array substrate is about 60% or less due to the opaque metal layer (including the gate lines, the data lines, the gate electrodes, and the source and drain electrodes) on the array substrate. If the transmittance and brightness of the liquid crystal panel are improved by increasing the power consumption and brightness of the backlight, thereby improving the quality of the liquid crystal display, the cost of the device is undoubtedly increased. Summary of the invention
  • An embodiment of the present invention provides a display panel including a color film substrate and an array substrate disposed opposite to each other, a metal layer and a pixel electrode are formed on an inner side of the array substrate, and a prism film is disposed on an outer side of the array substrate.
  • the prism film changes a direction of propagation of light perpendicularly directed toward the metal layer to bypass the metal layer and exit from the pixel electrode.
  • the metal layer includes at least one of a gate line, a data line, a common electrode line, a gate electrode, a source electrode, and a drain electrode.
  • the prism film includes a plurality of fixed light guiding portions, and the cross section of the fixed guiding light portion is respectively two isosceles trapezoids arranged in close proximity; The distance between two adjacent vertices on the two upper bases of the two isosceles trapezoids and the corresponding each gate line, each data line, each common electrode line, each gate electrode, each source electrode or The width of each drain electrode is the same, and the gap between the two vertices is located at the corresponding gate line, data line, public power Directly below the polar line, the gate electrode, the source electrode or the drain electrode, the isosceles trapezoid satisfies siny>l/n, wherein ⁇ is the angle between the waist of the isosceles trapezoid and the lower base, and ⁇ is The refractive index of the prism film.
  • the prism film includes a plurality of fixed light guiding portions, and the cross section of the fixed guiding light portion is respectively a parallelogram; the length of the bottom side of the parallelogram is corresponding to each of the gate lines, Each of the data lines, each of the common electrode lines, each of the gate electrodes, each of the source electrodes or each of the drain electrodes has the same width, and the parallelogram is located away from a bottom edge of the substrate at a corresponding gate line, data line Directly below the common electrode line, the gate electrode, the source electrode or the drain electrode, the parallelogram satisfies sinS ⁇ l/n, where ⁇ is the acute angle between the oblique side and the bottom side of the parallelogram, ⁇ is The refractive index of the prism film.
  • the prism film further includes a film bottom portion, and the plurality of guiding light portions are formed on the film bottom portion.
  • the film bottom portion is integrally formed with the plurality of fixed light guiding portions.
  • the outer side of the array substrate is further provided with a polarizer, and the film bottom portion or the fixed light guiding portion is adhered to the lower portion of the polarizer by liquid glue.
  • the prism film is polyethylene terephthalate, polycarbonate, polyether ether ketone, polystyrene, high density polyethylene, low density polyethylene, random polymerization Propylene, or polyethylene tetrafluoroethylene.
  • the embodiment of the invention further provides a display device comprising the above display panel.
  • FIG. 1 is a cross-sectional view of an array substrate of a display panel according to an embodiment of the present invention
  • FIG. 2 is a cross-sectional view of the array substrate of the display panel of Embodiment 1;
  • FIG. 3 is an optical path diagram of an array substrate of the display panel of FIG. 2;
  • FIG. 4 is a cross-sectional view showing an embodiment of an array substrate of a display panel of Embodiment 2; and FIG. 5 is a cross-sectional view showing another embodiment of the array substrate of the display panel of Embodiment 2.
  • the display panel of the embodiment of the invention includes a color film substrate and an array substrate disposed oppositely.
  • the array substrate includes a substrate 1 and a polarizer 2 , and the polarizer 2 is disposed on the light incident surface of the substrate 1 (toward the backlight)
  • a metal layer 3 and a pixel region 4 are formed on the inner side of the substrate 1 (the side opposite to the outer side surface), and the pixel region 4 is a light transmissive region, and the metal layer 3 includes an entrance portion to be incident thereon.
  • the metal layer 3 is the most important factor for reducing the transmittance of the array substrate, in order to improve the transmittance of the array substrate.
  • the display panel of the present invention is provided on the outside of the array substrate under the polarizer 2, and the prism film 5 is capable of changing the direction of propagation of light (indicated by an arrow) directed perpendicularly to the metal layer 3 to After the metal layer 3 is bypassed, it is emitted from the pixel region 4, thereby increasing the transmittance of the array substrate, thereby improving the display panel and the display device without increasing the brightness and power consumption of the backlight. Transmittance and brightness, improving its quality and more green, green.
  • the prism film includes a film bottom portion 5-1 and a plurality of fixed light guiding portions 5-2
  • the film bottom portion 5-1 is a film structure of a prism film material.
  • the plurality of fixed light guiding portions 5-2 are formed on the film bottom portion 5-1, and the film bottom portion 5-1 or the fixed light guiding portion 5-2 is adhered to the lower side of the polarizing plate 2 by liquid glue (only shown in the drawing)
  • liquid glue only shown in the drawing
  • the guide light portion 5-2 is located under each gate line, each data line, each common electrode line, each gate electrode, each source electrode or each drain electrode, and each guide
  • the cross section of the light portion 5-2 is respectively two isosceles trapezoids arranged in close proximity, and the distance s between two adjacent vertices on the two upper bases of the two isosceles trapezoids of each of the fixed light portions 5-2 Same as the width h of the corresponding gate line, data line, common electrode line, gate electrode, source electrode or drain electrode, and two tops A gap positioned between the corresponding gate lines, data lines, the common electrode line, the gate electrode, the source electrode or the drain electrode immediately below.
  • the reflection path is the optical path of the light passing through the prism film 5 of such a configuration and the alignment mode: the light ray a is incident on the upper bottom of the fixed light portion 5-1 through the prism film 5, and is in the isosceles trapezoid
  • the range of the upper base can be directly emitted without being refracted, and then transmitted through the array substrate; when the light b enters the prism film 5 and then encounters the waist portion of the guiding light portion 5-2, it is emitted by reflecting to the upper bottom.
  • the material of the prism film 5 is required to have high transmittance, easy processability, and thermal deformation stability.
  • Polymer resins meeting the above requirements can be used.
  • Corresponding polymer materials, refractive index and critical angle are, for example: polyethylene terephthalate PET (refractive index is 1.58, critical angle is 39.3.), polycarbonate PC (refractive index is 1.58, critical angle) 39.3.), polyetheretherketone PEEK (refractive index 1.68, critical angle 36.5.), polystyrene PS (refractive index 1.59, critical angle 39), high density polyethylene HDPE (refractive index 1.54) , critical angle is 40.5 °), low density polyethylene (refractive index is 1.51, critical angle is 41.5.), random polypropylene PP (refractive index 1.47, critical angle is 42.9.), polyethylene tetrafluoroethylene ETFE ( The refractive index is 1.36, the critical angle is 47.3.) and so on.
  • the prism film includes a film bottom portion 5-1 and a plurality of fixed light guiding portions 5-2, and the film bottom portion 5-1 is a prism film material.
  • the plurality of fixed light guiding portions 5-2 are formed on the film bottom portion 5-1, and the film bottom portion 5-1 or the fixed light guiding portion 5-2 is adhered to the lower side of the polarizing plate 2 by liquid glue (Fig.
  • the guiding light portion 5-2 is located under each gate line, each data line, each common electrode line, each gate electrode, each source electrode or each drain electrode, and a profile
  • the lengths of the bottom sides of the parallelograms are respectively the same as the widths h of the corresponding gate lines, data lines, common electrode lines, gate electrodes, source electrodes or drain electrodes, and the parallelograms are located away from the bottom edge of the substrate 1.
  • Corresponding gate line, data line, common electrode line, gate electrode, source Directly below the electrode or drain electrode.
  • light c After the incident, the light guide d is incident on the array substrate pixel region 4 directly through the polarizer 2 without passing through the polarizing guide portion 5-2 of the parallelogram; the light ray d is incident on the prism film 5 from the bottom edge of the parallelogram shaped guide portion 5-2.
  • the oblique portion of the guiding light portion 5-2 is encountered, two total reflections are generated to reach the upper bottom edge; after the light e is incident, the oblique portion of the light guiding portion 5-2 is incident on the parallelogram, and is once refracted. After the shot from the top.
  • the refractive index of the material is the refractive index of the material.
  • the material of the prism film 5 is required to have high transmittance, easy processability, and thermal deformation stability.
  • Polymer resins meeting the above requirements can be used.
  • Corresponding polymer materials, refractive index and critical angle are, for example: polyethylene terephthalate PET (refractive index is 1.58, critical angle is 39.3.), polycarbonate PC (refractive index is 1.58, critical angle) 39.3.), polyetheretherketone PEEK (refractive index 1.68, critical angle 36.5.), polystyrene PS (refractive index 1.59, critical angle 39), high density polyethylene HDPE (refractive index 1.54) , the critical angle is 40.5.), low density polyethylene (refractive index is 1.51, critical angle is 41.5.), atactic polypropylene PP (refractive index is 1.47, critical angle is 42.9.), polyethylene tetrafluoroethylene ETFE ( The refractive index is 1.36, the critical angle is 47.3.) and so on.
  • the shape and material of the guiding light portion 5-2 of the prism film 5 may be the same or different on the array substrate of the same display panel, and the shape may be any of the first embodiment and the second embodiment. One can be set according to needs or process convenience.
  • the light guiding portion 5-2 is made of the same material as the film bottom portion 5-1, the light guiding portion 5-2 and the film bottom portion 5-1 can be integrally molded.
  • the present invention also provides a display device comprising the above display panel, which may be any type of TN, PVA, MVA, FFS or IPS type liquid crystal display device such as a liquid crystal panel, a liquid crystal display, a liquid crystal television or the like.

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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)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

提供了一种显示面板及显示装置。该显示面板包括相对设置的彩膜基板和阵列基板，在所述阵列基板的内侧形成有金属层（3）及像素电极，在所述阵列基板的外侧设置有棱镜膜（5），所述棱镜膜（5）将垂直射向所述金属层（3）的光的传播方向改变为绕过所述金属层（3）后自所述像素电极出射。所述显示面板及显示装置在不增加背光源的亮度和功耗的前提下，提高了阵列基板的透过率，进而提高了显示面板及显示装置的透过率和亮度，提高其品质且更加绿色、环保。

Description

显示面板及显示装置 技术领域
本发明涉及一种显示面板及显示装置。 背景技术
液晶显示作为一种重要的平板显示方式， 近十多年有了飞速的发展， 其 具有轻、 薄、 低能耗等优点， 被广泛应用于电视、 计算机、 手机、 数码相机 等现代化信息设备。 液晶显示器的基本结构依次为： 背光源部分（光源、 导 光板、 各种扩散膜、 棱镜膜、 增亮膜等等） 、 下偏光片、 阵列基板、 液晶层 (包括液晶导向层） 、 彩膜基板、 以及上偏光片 （以及补偿膜等） 。 背光源 发出的光由下偏振片进入， 通过各个层后自上偏光片再出射， 此时出射的光 的亮度只相当于入射光的 7~8%或者更低。 其中， 由于阵列基板上的不透光 的金属层（包括栅线、 数据线、 栅电极以及源漏电极等）所限， 阵列基板的 透过率大约在 60%以下。 如果通过提高背光源功耗和亮度来提高液晶面板的 透过率和亮度， 进而提高液晶显示器的品质， 则无疑增加了设备的成本。 发明内容
本发明实施例提供了一种显示面板， 包括相对设置的彩膜基板和阵列基 板， 在所述阵列基板的内侧形成有金属层及像素电极， 在所述阵列基板的外 侧设置有棱镜膜 , 所述棱镜膜将垂直射向所述金属层的光的传播方向改变为 绕过所述金属层后自所述像素电极出射。
在本发明实施例中， 所述金属层包括栅线、 数据线、 公共电极线、 栅电 极、 源电极以及漏电极中的至少一种。
在本发明实施例中， 所述棱镜膜包括多个定向导光部分， 且所述定向导 光部分的剖面分别呈两个紧邻排列的等腰梯形； 每个所述定向导光部分的所 述两个等腰梯形的两个上底上相邻的两个顶点之间的距离与对应的每条栅 线、 每条数据线、 每条公共电极线、 每个栅电极、 每个源电极或每个漏电极 的宽度相同， 且所述两个顶点之间的空隙位于对应的栅线、 数据线、 公共电 极线、 栅电极、 源电极或漏电极的正下方， 所述等腰梯形满足 siny>l/n, 其 中， γ为所述等腰梯形的腰与下底之间的夹角， η为所述棱镜膜的折射率。
在本发明实施例中， 所述棱镜膜包括多个定向导光部分， 且所述定向导 光部分的剖面分别呈平行四边形； 所述平行四边形的底边的长度与对应的每 条栅线、 每条数据线、 每个公共电极线、 每个栅电极、 每个源电极或每个漏 电极的宽度相同， 且所述平行四边形远离所述基板的一条底边位于对应的栅 线、 数据线、 公共电极线、 栅电极、 源电极或漏电极的正下方， 所述平行四 边形满足 sinS≥l/n, δ为所述平行四边形的斜边与底边之间的锐角夹角， η为 所述棱镜膜的折射率。
在本发明实施例中， 所述棱镜膜还包括膜底部分， 所述多个定向导光部 分形成于所述膜底部分上。
在本发明实施例中， 所述膜底部分与所述多个定向导光部分一体成型。 在本发明实施例中， 所述阵列基板的外侧还设置有偏光片， 所述膜底部 分或所述定向导光部分通过液态胶粘合于所述偏光片下方。
在本发明实施例中， 所述棱镜膜为聚对苯二曱酸乙二醇酯、 聚碳酸酯、 聚醚醚酮、 聚苯乙烯、 高密度聚乙婦、 低密度聚乙烯、 无规聚丙烯、 或聚乙 烯四氟乙烯。
本发明实施例还提供了一种显示装置， 包括上述显示面板。 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， 而非对本发明的限制。
图 1为依照本发明一种实施方式的显示面板的阵列基板的剖视图； 图 2为实施例 1的显示面板的阵列基板的剖视图；
图 3为图 2的显示面板的阵列基板的光路图；
图 4为实施例 2的显示面板的阵列基板的一种实施方式的剖视图； 图 5为实施例 2的显示面板的阵列基板的另一种实施方式的剖视图。 具体实施方式 为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本发 明实施例的附图，对本发明实施例的技术方案进行清楚、 完整地描述。显然， 所描述的实施例是本发明的一部分实施例， 而不是全部的实施例。 基于所描 述的本发明的实施例， 本领域普通技术人员在无需创造性劳动的前提下所获 得的所有其他实施例， 都属于本发明保护的范围。
本发明实施例的显示面板包括相对设置的彩膜基板和阵列基板， 如图 1 所示， 阵列基板包括基板 1 以及偏光片 2, 偏光片 2设置在基板 1的入光面 (朝向背光源的外侧面）上， 基板 1的内侧（与该外侧面背对的一侧）上形 成有金属层 3以及像素区 4, 像素区 4为透光区， 该金属层 3包括会将朝其 入射的光反射回去的栅线、 数据线、 公共电极线、 栅电极、 源电极以及漏电 极中的至少一种， 金属层 3是降低阵列基板的透过率的最主要因素， 为了提 高阵列基板的透过率和亮度， 本发明的显示面板在阵列基板的外侧在偏光片 2下方设置棱镜膜 5,该棱镜膜 5能够将垂直射向该金属层 3的光 (箭头所示） 的传播方向改变为绕过该金属层 3后自像素区 4出射， 从而提高阵列基板的 透过率， 进而在不增加背光源的亮度和功耗的前提下， 提高包括显示面板及 显示装置的透过率和亮度， 提高其品质且更加绿色、 环保。
下面通过具体的实施例来进一步说明本发明的结构。
实施例 1
如图 2所示， 在本实施的显示面板中， 棱镜膜包括膜底部分 5-1以及多 个定向导光部分 5-2,膜底部分 5-1为一层棱镜膜材料的膜结构，该多个定向 导光部分 5-2形成在膜底部分 5-1上，膜底部分 5-1或定向导光部分 5-2通过 液态胶粘合在偏光片 2的下方（图中仅示出了膜底部分 5-1通过液态胶粘合 在偏光片 2的下方的结构形式） ， 且为了实现每个定向导光部分 5-2对光路 的改变的目的， 需要精确地实现以下方式的对位： 定向导光部分 5-2分别位 于每条栅线、 每条数据线、 每条公共电极线、 每个栅电极、 每个源电极或每 个漏电极的下方， 且每个定向导光部分 5-2的剖面分别呈两个紧邻排列的等 腰梯形， 每个定向导光部分 5-2的两个等腰梯形的两个上底上相邻的两个顶 点之间的距离 s与对应的栅线、 数据线、 公共电极线、 栅电极、 源电极或漏 电极的宽度 h相同， 且两个顶点之间的空隙位于对应的栅线、 数据线、 公共 电极线、 栅电极、 源电极或漏电极的正下方。 如图 3所示（ α为入射角， β 为反射角） ， 透过这样的结构及对位方式的棱镜膜 5的光的光路分别为： 光 线 a入射经过棱镜膜 5直接通过定向导光部分 5-1的上底出射， 在等腰梯形 的上底的范围内都可以不经折射直接出射， 进而透过阵列基板； 光线 b入射 棱镜膜 5后遇到定向导光部分 5-2的腰部分时通过反射到上底而出射。 为了 使光线达到全反射， 入射角 α要大于等于棱镜膜 5 的临界角 0c , 因为 sin0c=l/n, 从图中容易得出 α=γ, 所以在定向导光部分 5-2 中的等腰梯形的 腰部分与下底之间的夹角 γ应该满足， sinY≥sinec=l/n, n是棱镜膜 5材料的 折射率， 从而使得， 垂直入射至金属层 3的光的传播方向被改变， 且改变后 能够从像素区 4透过， 进而提高了阵列基板的透过率。
该棱镜膜 5的材料需要具备高透过率、 易加工性和热变形稳定性等。 符 合上述要求的聚合物树脂都可以釆用。 对应的聚合物材料， 折射率和临界角 例如是： 聚对苯二曱酸乙二醇酯 PET (折射率为 1.58、 临界角为 39.3。 ） 、 聚碳酸酯 PC (折射率为 1.58、 临界角为 39.3。 ) 、 聚醚醚酮 PEEK (折射率 为 1.68、临界角为 36.5。 )、聚苯乙烯 PS (折射率为 1.59、 临界角为 39。 )、 高密度聚乙烯 HDPE (折射率为 1.54、 临界角为 40.5° )、低密度聚乙烯（折 射率为 1.51、 临界角为 41.5。 ）、 无规聚丙烯 PP (折射率为 1.47、 临界角为 42.9。 ）、 聚乙烯四氟乙烯 ETFE (折射率为 1.36、 临界角为 47.3。 ）等等材 料。
实施例 2
如图 4和图 5所示， 在本实施的显示面板中， 棱镜膜包括膜底部分 5-1 以及多个定向导光部分 5-2 ,膜底部分 5-1为一层棱镜膜材料的膜结构，该多 个定向导光部分 5-2形成在膜底部分 5-1上， 膜底部分 5-1或定向导光部分 5-2通过液态胶粘合在偏光片 2的下方（图中仅示出了膜底部分 5-1通过液态 胶粘合在偏光片 2的下方的结构形式） ， 且为了实现每个定向导光部分 5-2 对光路的改变的目的， 需要精确地实现以下方式的对位： 定向导光部分 5-2 分别位于每条栅线、 每条数据线、 每条公共电极线、 每个栅电极、 每个源电 极或每个漏电极的下方， 且剖面分别呈平行四边形， 平行四边形的底边的长 度 1与对应的栅线、 数据线、 公共电极线、 栅电极、 源电极或漏电极的宽度 h相同， 且平行四边形远离基板 1的一条底边位于对应的栅线、 数据线、 公 共电极线、 栅电极、 源电极或漏电极的正下方。 如图 4和图 5所示， 光线 c 入射后， 不经过平行四边形的定向导光部分 5-2, 直接通过偏光片 2, 入射到 阵列基板像素区 4; 光线 d从平行四边形的定向导光部分 5-2的底边入射棱 镜膜 5后， 遇到定向导光部分 5-2的斜边部分时发生两次全反射到达上底边 出射； 光线 e入射后经过导光部分 5-2的斜边部分入射到平行四边形， 经一 次折射后从上底边出射。 为了使光线达到全反射， 平行四边形的斜边与底边 的锐角夹角 δ 要大于等于临界角 6c , 因为 sinec=l/n , 所以 δ 满足， sin5>sin0c=l/n, n是棱镜膜 5材料的折射率。
该棱镜膜 5的材料需要具备高透过率、 易加工性和热变形稳定性等。 符 合上述要求的聚合物树脂都可以釆用。 对应的聚合物材料， 折射率和临界角 例如是： 聚对苯二曱酸乙二醇酯 PET (折射率为 1.58、 临界角为 39.3。 ） 、 聚碳酸酯 PC (折射率为 1.58、 临界角为 39.3。 ) 、 聚醚醚酮 PEEK (折射率 为 1.68、临界角为 36.5。 )、聚苯乙烯 PS (折射率为 1.59、 临界角为 39。 ) 、 高密度聚乙烯 HDPE (折射率为 1.54、 临界角为 40.5。 ) 、低密度聚乙烯（折 射率为 1.51、 临界角为 41.5。 ）、 无规聚丙烯 PP (折射率为 1.47、 临界角为 42.9。 ）、 聚乙烯四氟乙烯 ETFE (折射率为 1.36、 临界角为 47.3。 ）等等材 料。
需要说明的是， 在同一块显示面板的阵列基板上， 棱镜膜 5的定向导光 部分 5-2的形状和材料可相同也可不同， 其形状也可为实施例 1和实施例 2 中任意一种， 可根据需要或工艺方便来进行设置。 在导光部分 5-2与膜底部 分 5-1釆用相同材料时， 可将导光部分 5-2与膜底部分 5-1进行一体成型。
此外， 本发明还提供了一种包括上述显示面板的显示装置， 该显示装置 可为诸如液晶面板、 液晶显示器、 液晶电视等的任意一种 TN、 PVA、 MVA、 FFS或 IPS型液晶显示装置。
以上所述仅是本发明的示范性实施方式， 而非用于限制本发明的保护范 围， 本发明的保护范围由所附的权利要求确定。

Claims

权利要求书
1、 一种显示面板， 包括相对设置的彩膜基板和阵列基板， 在所述阵列基 板的内侧形成有金属层及像素电极， 在所述阵列基板的外侧设置有棱镜膜， 所述棱镜膜将垂直射向所述金属层的光的传播方向改变为绕过所述金属层后 自所述像素电极出射。
2、如权利要求 1所述的显示面板，其中，所述金属层包括栅线、数据线、 公共电极线、 栅电极、 源电极以及漏电极中的至少一种。
3、如权利要求 2所述的显示面板， 其中， 所述棱镜膜包括多个定向导光 部分， 且所述定向导光部分的剖面分别呈两个紧邻排列的等腰梯形；
每个所述定向导光部分的所述两个等腰梯形的两个上底上相邻的两个顶 点之间的距离与对应的每条栅线、 每条数据线、 每条公共电极线、 每个栅电 极、 每个源电极或每个漏电极的宽度相同， 且所述两个顶点之间的空隙位于 对应的栅线、 数据线、 公共电极线、 栅电极、 源电极或漏电极的正下方； 所述等腰梯形满足 sinY≥l/n, 其中， γ为所述等腰梯形的腰与下底之间的 夹角， η为所述棱镜膜的折射率。
4、如权利要求 2所述的显示面板， 其中， 所述棱镜膜包括多个定向导光 部分， 且所述定向导光部分的剖面分别呈平行四边形；
所述平行四边形的底边的长度与对应的每条栅线、 每条数据线、 每条公 共电极线、 每个栅电极、 每个源电极或每个漏电极的宽度相同， 且所述平行 四边形远离所述基板的一条底边位于对应的栅线、 数据线、 公共电极线、 栅 电极、 源电极或漏电极的正下方；
所述平行四边形满足 sin5≥l/n, δ为所述平行四边形的斜边与底边之间的 锐角夹角， η为所述棱镜膜的折射率。
5、如权利要求 3或 4所述的显示面板， 其中， 所述棱镜膜还包括膜底部 分， 所述多个定向导光部分形成于所述膜底部分上。
6、如权利要求 5所述的显示面板， 其中， 所述膜底部分与所述多个定向 导光部分一体成型。
7、如权利要求 5所述的显示面板， 其中， 所述阵列基板的外侧还设置有 偏光片； 所述膜底部分或所述定向导光部分通过液态胶粘合于所述偏光片下 方。
8、 如权利要求 1-7任一项所述的显示面板， 其中， 所述棱镜膜为聚对苯 二曱酸乙二醇酯、 聚碳酸酯、 聚醚醚酮、 聚苯乙烯、 高密度聚乙婦、 低密度 聚乙烯、 无规聚丙烯、 或聚乙烯四氟乙烯。
9、 一种显示装置， 包括权利要求 1-8任一项所述的显示面板。
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