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CN108369357A - 包括反射背光式显示器的反射镜 - Google Patents

包括反射背光式显示器的反射镜 Download PDF

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CN108369357A
CN108369357A CN201680074414.6A CN201680074414A CN108369357A CN 108369357 A CN108369357 A CN 108369357A CN 201680074414 A CN201680074414 A CN 201680074414A CN 108369357 A CN108369357 A CN 108369357A
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reflective
reflective polarizer
backlit display
display
polarizer
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丰冈和彦
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3M Innovative Properties Co
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3M Innovative Properties Co
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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
    • G02F1/133553—Reflecting elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B60R1/12—Mirror assemblies combined with other articles, e.g. clocks
    • 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
    • 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
    • G—PHYSICS
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    • G02B5/00—Optical elements other than lenses
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    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3058—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state comprising electrically conductive elements, e.g. wire grids, conductive particles
    • 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • 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
    • G02B6/0055—Reflecting element, sheet or layer
    • 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
    • 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
    • G02F1/133536—Reflective polarizers
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B60R1/12—Mirror assemblies combined with other articles, e.g. clocks
    • B60R2001/1215—Mirror assemblies combined with other articles, e.g. clocks with information displays
    • 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
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • G02F1/133562—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements on the viewer side
    • 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
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • G02F1/133567—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements on the back side
    • 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

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • Liquid Crystal (AREA)
  • Polarising Elements (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Planar Illumination Modules (AREA)

Abstract

本发明描述了包括反射背光式显示器的反射镜。特别地，本发明描述了包括背光式显示器的反射镜，该背光式显示器具有背光源、液晶盒、第一反射偏振器、以及第二反射偏振器，该液晶盒包括设置在两个相对的透明基板层之间的液晶层。该第一反射偏振器和该第二反射偏振器各自直接层压至相对的透明基板层中的一个透明基板层。本文所述的反射镜可被构造为车辆后视镜。

Description

包括反射背光式显示器的反射镜
背景技术
反射镜用于许多目的，包括用于安全、美观和缝纫功能。常常在车辆中使用反射镜以大致观察车辆后面的环境道路和交通状况，而无需转动头部。背光式显示器利用空间光调制器来选择性地透射和吸收光。背光式显示器可以彩色或单色显示。
发明内容
在一个方面，本说明书涉及反射背光式显示器。特别地，本说明书涉及包括背光源、包括设置在两个相对的透明基板层之间的液晶层的液晶盒、第一反射偏振器、以及第二反射偏振器的反射背光式显示器。第一反射偏振器和第二反射偏振器各自直接与相对的透明基板层中的一个透明基板层相邻。
附图说明
图1为包括反射背光式显示器的后视镜的前正视图。
图2为反射背光式显示器堆叠的侧正视图。
具体实施方式
为了向驾驶员提供导航、状态、安全或其它信息，车辆中的后视镜且特别地中心(或内部)后视镜可包括显示元件。将该信息包含在中心后视镜中可为特别有用的，因为驾驶员可在不忽视车辆前部的道路和交通的情况下浏览此类信息。另外，驾驶员本能地常规仔细观看反射镜，并且因此将由驾驶员可靠地看到反射镜上显示的重要信息，而不必习惯于寻找新的或不寻常的位置。
传统的中心后视镜显示器通过只是在显示器的前部添加汽化涂膜反射镜(有时描述为半反射镜或部分反射镜或者半反射器或部分反射器)，适配传统的显示器堆叠。这样的适配反射了环境光线中的一些部分，产生反射镜状外观，而且还因为汽化涂膜反射镜为非偏振相关的反射器，所以使来自传统显示器堆叠的光的相同部分远离后视镜的发射表面(观察表面)反射。这种反射损耗在显示器堆叠中的传统损耗之上：来自前部吸收偏振器和后部吸收偏振器两者且也来自液晶层。当显示器不显示信息时，具有反射镜状外观允许反射镜的全表面为有用的或可视的。另外，通过具有均匀显现的后视镜，反射镜状外观可在美观上为优选的。
通过用反射偏振器替换至少前部吸收偏振器，并且在一些实施方案中用两个反射偏振器替换前部吸收偏振器和后部吸收偏振器两者，显示器堆叠可包含部分反射镜的环境光线反射功能，而无需附加层。另外，用反射偏振器替换至少一个吸收偏振器消除了来自堆叠的吸收元件中的至少一些吸收元件。与使用传统显示器堆叠的反射背光源相比，这些修改可提供具有更高亮度和效率的反射背光源显示器。
图1为包括反射背光式显示器的后视镜的前正视图。后视镜100包括反射镜部分110和显示信息的反射背光式显示器部分120。反射镜部分110和反射背光式显示器部分120可具有类似的外观。然而，反射背光式显示器部分120可能够直接显示所生成的信息或图像，而反射镜110不能。在一些实施方案中，反射镜部分110可为后视镜100的一小部分，诸如表面面积的40％、30％或20％。在一些实施方案中，反射镜部分110可为后视镜100的较大部分，诸如50％、60％、70％、80％、90％或更多。在一些实施方案中，反射镜部分可为介于后视镜的50％与90％之间。在一些实施方案中，显示器部分可为反射镜部分的100％；换句话说，反射镜部分和显示器部分可为相同的且填充后视镜的整个反射表面。后视镜100可在反射镜的边界上或附接零件上包括其它元件、控制装置或指示器。
图2为反射背光式显示器堆叠的侧正视图。反射背光式显示器堆叠200包括光源210、光导220、棱镜膜230、第一反射偏振器240、液晶盒250和第二反射偏振器260。
光源210可为任何合适的光源或光源的组合。可使用传统光源，诸如发光二极管(LED)、冷阴极荧光灯(CCFL)，和甚至白炽灯泡。在一些实施方案中，虽然在图2中将每个光源210描绘为单个对象，但是可使用LED(例如)的组合来提供足够的白输入光，但根据应用，可利用任何合适的光谱或光谱的组合。光源210可包括合适的注入或准直光学器件，以有助于将光耦合到结构化光导中或帮助使结构化光导的光输入成型。光源210设置在光导的任一侧或两侧上。任一侧上的光源210可为相同或类似的光源，或者它们可为不同的。
光导220可为任何合适的尺寸和形状，并且可通过任何合适的工艺由任何合适的材料形成。例如，光导220可为丙烯酸或聚碳酸酯。光导120可由工艺诸如注塑形成。光导120具有至少一个输入边缘。输入边缘通常设置在最靠近一个或多个光源的光导的表面上。输入边缘可具有任何合适的形状或结构，包括用于改善来自光源的光耦合到结构化光导的结构。光导220也具有用于提取光的一个或多个特征结构。这些提取特征结构可以任何合适的构型，包括周期性图案、非周期性图案或梯度来布置。提取特征结构可以增加从光导220输出的光的面积均匀度的图案布置。
棱镜膜230在本文所述的构造中为任选的，但是可通过光再循环利用来增加总体轴向亮度。在这种情况下，可使用反射器(未示出)来再次朝向反射背光式堆叠200的前部重新引导通过在棱镜膜小平面与空气之间的接触面处全内反射从棱镜膜230反射回来的光。反射器可被涂覆到光导220上或者可为不存在的，其中反射背光式堆叠只是依赖于棱镜膜和光导的接触面的菲涅耳反射。在一些实施方案中，反射器为多层光学膜，诸如增强型镜面反射器(ESR)(购自明尼苏达州圣保罗的3M公司(3M Company,St.Paul,Minn.))。
棱镜膜230具有在相同的第一方向上延伸的多个棱镜。在一些实施方案中，棱镜膜230可代替地具有多个膜，其中至少一个膜具有在第一方向上延伸的棱镜，并且至少一个膜具有在与第一方向正交的第二方向上延伸的棱镜。对于多个棱镜膜，它们可彼此层压或者可只是彼此贴靠。棱镜膜可通过任何合适的工艺,包括微复制，例如通过连续浇铸和固化工艺等形成。
棱镜膜230的棱镜可具有任何合适的几何结构，包括夹角、底角、高度、节距、宽度和旋转—并且这些参数中的一者或多者可沿棱镜或在棱镜上变化。棱镜膜230可为例如增亮膜(BEF)(购自明尼苏达州圣保罗的3M公司(3M Company,St.Paul,Minn.))。
第一反射偏振器240和第二反射偏振器260设置在液晶层250的任一侧上。液晶盒250通常包括被两层玻璃或另一透明基板夹置的液晶层。反射偏振器可都与透明基板相邻，或者一者或两者可直接层压至液晶盒的玻璃或透明基板。可使用执行该层压。另选地，可仅将反射偏振器中的一者直接层压至液晶盒的玻璃或透明基板，或者甚至可将反射偏振器不直接层压至液晶盒的玻璃或透明基板。
第一反射偏振器240可为任何合适的反射型偏振器。在一些实施方案中，反射偏振器可为取向的多层聚合物光学膜，诸如DBEF或APF反射偏振器(购自明尼苏达州圣保罗的3M公司(3M Company,St.Paul.,Minn.))。在一些实施方案中，反射偏振器可为线栅反射偏振器或胆甾型反射偏振器。在这些实施方案中的一些实施方案中，反射偏振器可包括一个或多个延迟或补偿层，诸如四分之一波片，以在线性偏振和圆形或椭圆偏振之间转换。第一反射偏振器240可具有任何合适的厚度；就多层光学膜而言，反射偏振器可为较厚的多包或层压构造或相对较薄的单包构造。第二反射偏振器260可与第一反射偏振器240相同或者它们可为类似的。在一些实施方案中，第一反射偏振器240和第二反射偏振器260可具有一些或许多不同的特性。在一些实施方案中，可在第一反射偏振器和第二反射偏振器中的任一者或两者上设置附加的一个反射偏振器或多个反射偏振器。换句话讲，在的每侧上可存在两个或更多个反射偏振器。
第一反射偏振器240和第二反射偏振器260被构造成允许液晶盒250通过选择性地选通光来操作。根据在液晶盒250中使用的液晶材料的类型(例如，扭转向列型、超扭转向列型等)以及如何电驱动液晶盒，反射偏振器的透光轴应当被构造成使得对处于“开”状态的像素—即，处于在液晶盒的像素上生成电压差的状态下，来自光源的光基本上经过第二反射偏振器，或者它基本上不透过第二反射偏振器，并且对处于“关”状态的像素—即，处于在液晶盒的像素上不存在电压差的状态下，来自光源的光被相反地处理。对于某些类型的液晶盒，中间状态是可能的。在一些实施方案中，这可为反射偏振器的透光轴的平行布置，或反射偏振器的透光轴的正交布置。任何合适的驱动电子器件、导电层或薄膜晶体管(TFT)可被包括或集成到液晶盒250中或者包括在液晶盒250中。
实施例
通过仅在一半上去除层压到液晶盒玻璃的任一侧的吸收偏振器，修改用于SONYVAIO PCG-572N(购自日本东京的索尼公司(Sony Corp.,Tokyo,Japan))笔记本式计算机的液晶显示器。在去除显示器的一半上的吸收偏振器之后，通过将3M APF-T35反射偏振器(购自明尼苏达州圣保罗的3M公司(3M Company,St.Paul,Minn.))层压到玻璃，替换吸收偏振器。在“开”(显示图像)和“关”(不显示图像)两个状态下替换并观察液晶显示器。液晶显示器的修改的部分用作反射背光式显示器，当显示器为关时用作反射镜，并且当显示器为开时示出可视图像。当与参考一半的显示器相比时，性能为可接受的，尤其是考虑到参考显示器还将需要汽化涂膜的部分反射镜用作反射背光式显示器。
以下为根据本公开的示例性实施方案：
项目1.一种反射背光式显示器，包括：
背光源；
液晶盒，液晶盒包括设置在两个相对的透明基板层之间的液晶层；
第一反射偏振器；和
第二反射偏振器，
其中第一反射偏振器和第二反射偏振器各自直接与相对的透明基板层中的一个透明基板层相邻。
项目2.根据项目1所述的反射背光式显示器，其中第一反射偏振器或第二反射偏振器中的至少一个为多层反射偏振器。
项目3.根据项目1所述的反射背光式显示器，其中第一反射偏振器或第二反射偏振器中的每一者为多层反射偏振器。
项目4.根据项目3所述的反射背光式显示器，其中两个透明基板层为玻璃。
项目5.根据项目1所述的反射背光式显示器，其中第一反射偏振器和第二反射偏振器各自直接层压至相对的透明基板层中的一个透明基板层。
项目6.根据项目1所述的反射背光式显示器，其中背光源包括光导、设置在光导上的反射器、以及构造成将光注入到光导中的光源。
项目7.根据项目1所述的反射背光式显示器，还包括第三反射偏振器，其中第三反射偏振器设置在第一反射偏振器或第二反射偏振器上。
项目8.一种反射镜，包括：
反射镜部分；和
反射背光式显示器部分，反射背光式显示器部分包括根据项目1所述的反射背光式显示器，
其中反射背光式显示器能够直接显示图像，并且反射镜部分不能直接显示图像。
项目9.一种车辆，车辆包括根据项目8所述的反射镜，反射镜被构造为后视镜。
项目10.根据项目9所述的反射镜，其中反射背光式显示器部分大于反射镜的面积的10％但小于反射镜的该面积的50％。
项目11.根据项目1所述的反射背光式显示器，其中反射背光式显示器不包括吸收偏振器。
项目12.根据项目1所述的反射背光式显示器，其中反射背光式显示器不包括非偏振相关的部分反射器。

Claims (12)

1.一种反射背光式显示器，包括：
背光源；
液晶盒，所述液晶盒包括设置在两个相对的透明基板层之间的液晶层；
第一反射偏振器；和
第二反射偏振器，
其中所述第一反射偏振器和所述第二反射偏振器各自直接与所述相对的透明基板层中的一个透明基板层相邻。
2.根据权利要求1所述的反射背光式显示器，其中所述第一反射偏振器或所述第二反射偏振器中的至少一者为多层反射偏振器。
3.根据权利要求1所述的反射背光式显示器，其中所述第一反射偏振器或所述第二反射偏振器中的每一者为多层反射偏振器。
4.根据权利要求3所述的反射背光式显示器，其中所述两个透明基板层为玻璃。
5.根据权利要求1所述的反射背光式显示器，其中所述第一反射偏振器和所述第二反射偏振器各自直接层压至所述相对的透明基板层中的一个透明基板层。
6.根据权利要求1所述的反射背光式显示器，其中所述背光源包括光导、设置在所述光导上的反射器、以及构造成将光注入到所述光导中的光源。
7.根据权利要求1所述的反射背光式显示器，还包括第三反射偏振器，其中所述第三反射偏振器设置在所述第一反射偏振器或所述第二反射偏振器上。
8.一种反射镜，包括：
反射镜部分；和
反射背光式显示器部分，所述反射背光式显示器部分包括根据权利要求1所述的反射背光式显示器，
其中所述反射背光式显示器能够直接显示图像，并且所述反射镜部分不能直接显示图像。
9.一种车辆，所述车辆包括根据权利要求8所述的反射镜，所述反射镜被构造为后视镜。
10.根据权利要求9所述的反射镜，其中所述反射背光式显示器部分大于所述反射镜的面积的10％但小于所述反射镜的所述面积的50％。
11.根据权利要求1所述的反射背光式显示器，其中所述反射背光式显示器不包括吸收偏振器。
12.根据权利要求1所述的反射背光式显示器，其中所述反射背光式显示器不包括非偏振相关的部分反射器。
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