CN1189224A - Optical panel capable of switching between reflective and transmissive state - Google Patents

Optical panel capable of switching between reflective and transmissive state Download PDF

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CN1189224A
CN1189224A CN 96195043 CN96195043A CN1189224A CN 1189224 A CN1189224 A CN 1189224A CN 96195043 CN96195043 CN 96195043 CN 96195043 A CN96195043 A CN 96195043A CN 1189224 A CN1189224 A CN 1189224A
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optical
panel
state
capable
switching
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CN 96195043
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Chinese (zh)
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迈克尔·F·韦伯
安德鲁·J·乌德柯克
戴维·J·W·阿斯图思
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美国3M公司
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Abstract

本发明提供一种装置(8),包含可转换光板(10)和用于使光板在反射状态和透射状态之间进行转换的装置(19,21,23)。 The present invention provides an apparatus (8), comprising a converting means for converting the light panel is between the reflective state and the transmissive state light board (10), and for (19, 21). 可转换光板包含具有第一和第二主表面的透明旋光薄层(12),安装在第一主表面上的第一反射偏振器(32),安装在第二主表面上的第二反射偏振器(34)。 May be converted light having a first panel comprising a transparent optically active thin layer (12) of the second major surface, a first reflective polarizer (32) mounted on the first main surface, is mounted on the second main surface of the second reflective polarizer (34). 旋光薄层宜包含一液晶装置,而转换装置宜包含用于在液晶装置间施加电压的驱动电子的系统。 An optically thin layer should comprise a liquid crystal device, and electronic switching means includes a drive system suitable for applying a voltage across the liquid crystal device is used. 本发明还包含可转换窗口(62,114)和透射反射光学显示器128。 The present invention further comprises a switching window (62, 114) and a transflective optical display 128.

Description

可在反射和透射状态之间转换的光板 Switchable between a light transmissive state and a reflective plate

发明领域本发明涉及一种光学装置,这种装置能在反射及透射状态之间进行转换。 Field of the Invention The present invention relates to an optical device which can switch between reflective and transmissive state. 本发明还涉及一种可换向的窗口(switchable window)和一种透射反射(transflective)的光学显示器,它们都包含这种可转换的光学装置。 The present invention further relates to a window (switchable window) A commutation and one transflective (a transflective) of the optical display apparatus which contains such an optical switchable.

发明背景能够在打开(透射)和关闭(不透射)状态之间进行转换的窗口通常用于保密窗口和保密帘中。 Background of the invention can be (without transmitting) an open (transmissive) and a closed state transitions between windows typically used in privacy windows and privacy curtains. 当前用于这种窗口的技术通常基于光学吸收或光学散射机理。 Current techniques for such windows is typically absorb or optically based on optical scattering mechanisms. 当一个光学吸收窗口处于关闭状态时,入射到窗口上的大部分光被吸收而且窗口呈暗的不透明状。 When the optical absorption of a window is closed, most of the incident light is absorbed in the window and the window was a dark opaque. 这种类型的窗口是不受欢迎的,因为当窗口暴露于阳光时产生过量的热。 This type of window is undesirable because when the window is exposed to sunlight generates excessive heat. 这种窗口的例子是电致变色显示装置和液晶显示(LCD)光闸(具有吸收偏振器)。 Examples of such windows are electrochromic display apparatus and a liquid crystal display (LCD) shutter (having an absorption polarizer).

当在关闭状态时,使用光学散射机理的窗口使光线在向前的方向漫散射,从而窗口呈现白色。 When in a closed state, an optical scattering mechanism of the window so that the light diffusely scattered in the forward direction, so that the window appears white. 结果,窗口大致上不阻挡入射光,在建筑中(比如家和办公室)对能量控制是没用的。 As a result, the window does not substantially block the incident light, in the building (such as homes and offices) for energy control is useless. 在美国第4,435,047专利中描述了这种窗口。 In U.S. Patent No. 4,435,047 first described in this window.

光学显示器,如LCDs之类,被广泛地用于膝上型计算机,手持计算器,数字手表等等。 Optical displays, such as LCDs or the like, are widely used for laptop computers, hand-held calculators, digital watches and the like. 在传统的LCD装配中,液晶板和电极矩阵位于前吸收偏振器和后显示偏振器之间。 In the conventional LCD assembly, a liquid crystal panel, and a matrix of electrodes located on the front absorptive polarizer and a rear polarizer between the display. 在LCD中,液晶部分由施加电场来改变它们的光学状态。 In the LCD, the liquid crystal in part by applying an electric field to change their optical state. 这种处理产生需要显示偏振光中信息图像元素,或者象素的对比度。 Such treatment yields the polarization information needs to display image element, or pixel contrast.

典型地,吸收偏振器使用两向色性染料,这种染料吸收一偏振方向的光线比吸收其正交偏振方向的光线强。 Typically, two light absorbing polarizer using a dichroic dye, which dye absorbs a polarization direction which is stronger than the light absorbing orthogonal polarization direction. 通常,前偏振器的传送轴和后偏振器的传送轴“交叉”。 Typically, transmission shaft and the rear polarizer transmission axis of the front polarizer is "cross." 交叉角可以在零和九十度之间变化。 Crossing angle can vary between zero and ninety degrees.

可以基于明亮源对光学显示器分类。 Classification may be based on an optical display bright source. 反射显示器由从前面进入显示器的环境光明亮。 Reflected by the display monitor from the front into the bright ambient light. 典型地,镀铝反射镜放在LCD装置的后面。 Typically, aluminum reflector on the back of the LCD device. 当保留入射到反射表面的光线的偏振方向时,这种反射表面使光线回到LCD装置。 While retaining the polarization direction of the light incident to the reflective surface, the reflective surface such that light back to the LCD device.

当环境光的强度对观看不够的时候,在应用中通常以一个背景光装置替代反射表面。 When the intensity of ambient light is not enough time to watch, in the application to a backlight device is generally substitute reflective surface. 典型的背景光装置包含一个光学空腔和一盏灯或其它产生光线的装置。 Typical background light optical means comprises a cavity and a lamp or other light generating means. 在携带式显示装置如膝上型计算机的情况下,背景光由电池供电。 In the case of a portable display device such as a laptop computer, background light powered by a battery. 显示器要在环境光明亮和背光明亮条件下都可观看的被称为“透射反射”。 The display can be viewed in bright ambient light and the backlight in bright conditions are called "transflective." 透射反射显示器的一个问题是光线背景光不如传统的镀铝表面那样是有效的反射器。 One problem is that the light transmissive reflective display background light as good as the surface of a conventional aluminum reflector to be effective. 背景光还使光线的偏振随机化,还减少了明亮LCD有用的光线的数量。 Background light also randomize polarization of light, a bright LCD also reduces the number of useful light. 结果,将背景光加到LCD装置使得在周围光线下观看时显示不太亮。 As a result, background light to the LCD display device such that when viewed in ambient light less bright.

一个无源的透射反射器(transflector)可置于透射反射显示器的LCD和背景光之间,以在环境光明亮和背光明亮情况下改进显示器亮度。 A passive transmissive reflector (transflector) may be disposed between the transflective LCD display and the background light, to improve display brightness in a bright ambient light and bright backlight situation. 无源透射反射器是一个光学装置,它在单一状态下既可作透射器又可作反射器。 Passive transflector is an optical device which in a single state not only for transmission but also for the reflector device. 不幸的是,在两种情况下无源的透射反射器s都是无效的,典型地,透射仅为来自背景光的光线的30%,反射周围光的60%,而吸收剩下的10%。 Unfortunately, in both cases passive transflector s are invalid, typically, transmission of only 30% of the light from the background light, around 60% of the reflected light, while absorbing the remaining 10% .

光学显示器的第三种类型合并了一个专用的背景光,当显示器工作时,不论环境光的级别如何,它都打开。 A third type of optical display incorporates a dedicated backlight, when the display operates, regardless of the level of ambient light, it are open. 这种背景光在一个携带式的显示装置中对电池是重大的耗费。 Such background light in a portable display device is a major cost to the battery.

发明概要本发明提供一种装置,该装置包含可转换光板,该光板包含具有第一和第二主表面的透明旋光薄层,安装在第一主表面上的第一反射偏振器,和安装在第二主表面上的第二反射偏振器。 SUMMARY The present invention provides an apparatus, the apparatus comprising a switchable optical panel, the light panel comprising an optically transparent sheet having first and second major surfaces, mounted on the first major surface of the first reflective polarizer, and installation a second reflective polarizer on the second major surface. 该装置还包含用于使光板在反射状态和透射状态之间转换的装置。 The apparatus further includes an optical plate means between the reflective state and the transmissive state transitions for.

在一个实施例中,旋光薄层包含具有一对并行配准的,在期间形成空腔的的透明衬底的液晶装置。 In one embodiment, the optical sheet comprises, a transparent liquid crystal device substrate during forming a cavity having a pair of parallel registration. 每个衬底有面对空腔的内部表面和外部表面。 Each substrate having the cavity facing the interior surface and an exterior surface. 液晶装置还包含导电层材料(在每个衬底的内部表面上)和限定在空腔中的液晶材料。 The liquid crystal device further comprises a conductive material layer (on the interior surface of each substrate) and defining the liquid crystal material in the cavity. 在这个实施例中,转换装置是一个连接到导电材料上为液晶装置提供电压的驱动电子的系统。 In this embodiment, the conversion means is connected to an electronic drive system providing a voltage on the conductive material for the liquid crystal device. 导电材料可包含在每个衬底的内部表面上的薄膜可寻址的电极模型,以形成象素液晶装置,或在每个衬底的内部表面上形成连续的透明导电层。 It may comprise a conductive material on the inner surface of each substrate film addressable electrode pattern, to form a liquid crystal pixel device, or a continuous transparent conductive layer formed on the inner surface of each substrate. 液晶装置宜是扭曲向列液晶装置。 Should the liquid crystal device is a twisted nematic liquid crystal device.

第一和第二反射偏振器宜每个都包含相邻材料薄层对的多层叠堆,每个薄层对在偏振器的平面中第一方向上相邻薄层之间呈现折射率差异,并大体上在偏振器的平面中和第一方向正交的第二方向上相邻薄层之间大体上不呈现折射率差异。 First and second reflective polarizers each comprise appropriate multilayer stack adjacent sheet material, each sheet between adjacent first direction in the plane of the sheet polarizer exhibits a refractive index difference, and generally exhibit substantially no difference between the refractive index in the plane of the thin layer adjacent polarizer in a second direction perpendicular to the first direction.

装置最好包含可转换光板,该光板包含扭曲向列液晶装置,该液晶装置包含以并行配准的第一和第二透明平面衬底(在它们之间形成一个空腔),每个衬底具有一个外部表面和内部表面,液晶材料限定在空腔中。 Conversion means preferably comprises a light panel, the light panel comprising a twisted nematic liquid crystal device comprising a liquid crystal device in parallel registration with first and second transparent planar substrate (forming a cavity therebetween), each of the substrates having an outer surface and an inner surface, the liquid crystal material is defined in the cavity. 液晶装置还包含连续的透明导电层(在衬底的内部表面上),安装在第一衬底的外部表面上的第一反射偏振器和安装在第二衬底的外部表面上的第二反射偏振器。 A second reflective liquid crystal device further includes continuous transparent conductive layers (on the interior surface of the substrate), mounted on the external surface of the first substrate and a first reflective polarizer mounted on the outer surface of the second substrate polarizer. 第一和第二反射偏振器每个都包含至少100个薄层对的叠堆,其中每个叠堆对都包含和另一个聚合体薄层相邻的双折射薄层,它可是各向同性的或双折射的。 First and second reflective polarizers each comprising at least a thin layer 100 of the stack, and wherein each stack of thin layer further contains a polymeric birefringent thin layer adjacent to, but it is isotropic or birefringence. 该装置还包含连接到导电层驱动电子的系统,从而光板在反射状态和透射状态之间是可以电子方式转换的。 The apparatus further comprises drive electronics connected to the conductive layer of the system, between the reflective plate so that the light transmissive state and a state transition is electronic.

或者该装置还可包含可转换光学装置(包含一对以并行配准并在期间形成空腔的反射偏振器),各具有一个面对空腔的内部表面和外部表面的反射偏振器。 Or the device may further comprise a conversion optical means (includes a pair of parallel registration and a cavity formed during the reflective polarizer), each having an outer surface facing the inner surface of the cavity and the reflective polarizer. 液晶装置还包含形成在空腔中的液晶材料和在反射偏振器的内部表面上的透明导电层。 The liquid crystal device further comprises a liquid crystal material in the cavity and a transparent conductive layer on the inner surface of the reflective polarizers. 装置还包含连接到导电层,驱动电子的系统,从而光板在反射状态和透射状态之间可以电子方式转换。 Further comprising means connected to the conductive layer, the electronic drive system, so that the light panel can be electronically switched between a reflective state and a transmissive state.

本发明还提供了一种可转换窗口,包含上述可转换光板和用于给可转换光板提供电场以在打开状态和关闭状态之间转换的装置。 The present invention also provides a switchable windows, including the plate and the converted light can be converted to a light panel for providing an electric field to the device between an open state and a closed state transitions. 在可转换光板中的每个反射偏振器宜如上所述是多层叠堆。 Each reflective polarizer in the optical plate can be converted as described above is suitable multilayer stack. 窗口还可包含至少一个透明窗玻璃(位于可转换光板附近并与其平行)。 Further comprising at least one transparent window glazing (in the vicinity of the light may be converted and parallel to the plate).

窗口可设计为“正常打开”或“正常关闭”结构。 Window may be designed as a "normally open" or "normally closed" configuration. 在正常打开结构中,窗口在无电场时是透射的,而在正常关闭结构中,无电场时窗口是不透射的。 In the normal open configuration, the transmissive window in the absence of an electric field, in normal closed configuration when no electric field is not transmissive window.

本发明还提供了一种窗口,它的打开和关闭状态是可机械转换的。 The present invention further provides a window, its open and closed states are mechanically translatable. 窗口包含具有第一和第二主表面的第一透明窗玻璃,安装在第一透明窗玻璃上的第一反射偏振器,和至少一个包含第二透明窗玻璃的光闸,安装在第二透明窗玻璃上的第二反射偏振器,和安装在第二透明窗玻璃上和第二反射偏振器相对的旋光薄层。 A first transparent window comprising a glazing having a first and a second major surface, a first reflective polarizer mounted on the first transparent glazing, comprising at least one shutter and a second transparent glazing, mounted on the second transparent a second reflective polarizer on the window pane, and the glazing is mounted on the second transparent sheet and the optical reflective polarizer opposite to the second. 窗口还可包含用于将光闸旋转以定位旋光薄层或第二反射偏振器并和第一反射偏振器平行的装置。 Window may also include means for rotating the shutter to be positioned optically thin layer or the second and the first reflective polarizer and reflective polarizer parallel.

本发明的可转换窗口允许用于试图保密的窗口透射,建筑物中,家中,和汽车中的光线控制和能量控制的电子或机械控制。 Switchable window allows the present invention to attempt confidential transmission window, building, home, and light control and energy control electronic or mechanical control of the car. 该窗口不吸收大量的室外光线,因此避免了光学吸收窗口的过度的窗口发热特性。 The window does not absorb a large amount of outside light, thereby avoiding excessive heat generation characteristics of the optical absorption window in the window.

本发明还提供一种透射反射光学显示器,它包含液晶显示器(包含前吸收偏振器,后吸收偏振器和位于其间的象素液晶装置),邻近液晶显示器用于明亮液晶显示装置的背景光,位于液晶显示器和背景光之间的可转换transfoector,位于液晶显示装置和背景光之间的光学漫射器,和位于光学漫射器和背景光之间的可转换透射反射器。 The present invention also provides a transflective optical display, comprising a liquid crystal display (front comprising absorbing polarizer, absorption polarizer and a liquid crystal means located between pixels), adjacent to the liquid crystal display device for a bright liquid crystal display backlight located switchable between a liquid crystal display and the background light transfoector, optical diffuser positioned between the liquid crystal display device and a backlight, and switchable reflector is between the optical transmissive diffuser and background light. 可转换透射反射器包含具有邻近后吸收偏振器的前表面和后表面,液晶装置具有前向列方向(和前表面相关)和后向列方向(和后表面相关)以及反射偏振器(安装在无象素液晶装置的后表面上,并邻近背景光)。 Switchable transflector comprises a front surface and a rear surface of the absorber of the polarizer adjacent to the rear, the liquid crystal device (and the front surface related) in the column direction having a front (and rear surfaces related), and the column direction, and a reflective polarizer (mounted no pixel on the rear surface of the liquid crystal device, and adjacent background light). 光学装置还包含用于在反射状态和透射状态之间电子转换透射反射器的装置。 The optical device further comprises means for transmission between a reflective state and a transmissive state of the electronic converter reflector. 后吸收偏振器的偏振方向平行于液晶装置前向列方向。 Absorbing polarizer polarization direction is parallel to the column direction of the front to the liquid crystal device. 反射偏振器宜都如上所述是多层薄片。 Yidu reflective polarizer is a multilayer sheet as described above.

在透射状态和反射状态可转换透射反射器都是有效的,允许本发明的透射反射光学显示器使用至少80%的给LCD的明亮的有用光,无论其光源如何。 In the transmissive state and a reflective state switchable transflector it is effective, the present invention allows the optical transflective display using at least 80% of the LCD with a bright light, regardless of their source. 由于透射反射器的效率,为了增加电池的使用寿命,可在正常环境光的条件下关闭背景光。 Since the transmission efficiency of the reflector, in order to increase battery life, the backlight can be turned off under normal ambient light conditions.

附图概述图1是根据本发明的一个实施例的可换向的光学装置的略图。 BRIEF DESCRIPTION FIG. 1 is an optical device to change a thumbnail according to an embodiment of the present invention.

图2是和本发明一起使用的反射偏振器的局部略图。 FIG 2 is a partially omitted, and FIG reflective polarizer for use with the present invention.

图3是根据本发明的一个实施例的可换向的光板的略图。 FIG 3 is a light panel to change the thumbnail view of one embodiment of the present invention.

图4是当施加了电场后图3的光板(panel)的略图。 FIG 4 when an electric field is applied to the light panel of FIG. 3 (Panel) thumbnails.

图5是根据本发明的一个实施例的可换向窗口的略图。 FIG 5 is a sketch of reversing the window according to one embodiment of the present invention.

图6a,6b,7a和7b是侧视略图,说明了图5的可换向窗口的操作。 FIG. 6a, 6b, 7a and 7b are a side view sketch, illustrate the switching operation can be to a window 5 of FIG.

图8是根据本发明的一个实施例的可换向窗口的略图。 FIG 8 is a sketch of reversing the window according to one embodiment of the present invention.

图9根据本发明的一个实施例的xx.透射反射光学装置的侧视略图。 FIG 9 xx in accordance with one embodiment of the present invention. Transflective optical device side thumbnails.

图10和11是侧视略图,说明了图9的xx.透射反射光学装置的操作。 10 and FIG. 11 is a side view sketch, xx in FIG. 9 illustrates the transmissive reflective optical operation apparatus.

图12-14分别显示了例子1-3中反射偏振器的光学性能。 Figures 12-14 show optical performance of the reflective polarizers in Examples 1-3.

详细描述本发明的装置包含可换向光板(该光板包含具有两个主表面的透明旋光层),放置于旋光层的一个主表面上的第一反射偏振器和放置于另一个主表面上的第二反射偏振器。 DETAILED DESCRIPTION The present invention comprises an interchangeable (comprising a transparent optically active layer having two major surfaces of the plate light) to the optical plate, a first reflective polarizer disposed on one major surface of the optically active layer and placed on the other main surface of the a second reflective polarizer. 本装置还包含用于在反射状态和透射状态之间进行转换的装置。 The present apparatus further comprises means for switching between a reflective state and a transmissive state.

图1显示了本装置的一种较佳实施例。 Figure 1 shows a preferred embodiment of the present apparatus. 装置8包含可换向光板10,该光板中旋光层包含液晶装置12。 8 comprises a transducer device 10, the optical rotation plate 12 toward the liquid crystal layer comprises a light panel. 液晶装置12包含一对并行配准的、覆盖并互相分离的透明平面衬底(planar substrate)14和16。 The liquid crystal device 12 includes a pair of parallel registration, covered and separated from each other transparent planar substrates (planar substrate) 14 and 16. 衬底的周围用有粘性的密封剂加以结合和密封(图中未示),形成一密封的空腔。 It was combined together and around the substrate a seal (not shown) to form a sealed cavity with the sealant has viscous. 该空腔充满液晶材料18。 The cavity is filled with liquid crystal material 18. 导电材料设置在两衬底的内部表面上,以允许电压可施加在液晶材料上。 A conductive material disposed on the interior surfaces of the two substrates to allow voltage may be applied to the liquid crystal material. 导电材料可如图1中所示的连续的透明导电层20和22的形式,或是薄膜状可寻址的电极,以形成像素液晶装置。 1 in the form of continuous transparent conductive layer shown in FIG. 20 and 22 a thin film addressable electrodes can be a conductive material in FIG., Or, to form a pixel of the liquid crystal device. 一个像素液晶装置由几千个小图象单元,或“象素”构成,它们可以产生黑色,白色,或可能是灰色。 A pixel of the liquid crystal device thousands of small picture elements, or "pixels" configuration, they can produce black, white, or possibly gray. 当作为一个典型的液晶显示器(LCD)的一部分时,通过适当处理各别的象素可以显示一幅图像。 When used as a typical liquid crystal display (LCD) part, an image can be displayed by appropriate processing respective pixels.

放置于透明导电层的内部表面上的准直层24和26使液晶材料18在和每一衬底的分界面上得到想要的方向校正(orientation)。 Placed on the inner surface of the transparent conductive layer 24 and the alignment layer 26 of the liquid crystal material 18 correction (Orientation) in each direction and the boundary surface of the substrate to give desired. 箭头28和30表示当没有电场时液晶材料分子怎样通过准直层24和26呈大约90°的扭曲。 Arrows 28 and 30 represent a collimating layers 24 and 26 were twisted about 90 ° when no electric field is how the liquid crystal molecules through the material. 液晶装置较佳为具有0°和90°之间的旋转角的扭曲向列(TN)型液晶。 Preferably, the liquid crystal device having a twist angle of rotation between 0 ° and 90 ° nematic (TN) type liquid crystal. 更佳的为80°和90°之间的旋转角。 More preferably for the angle of rotation between 80 ° and 90 °. 或者,液晶装置可以是具有旋转角度在180°和270°之间的超扭曲向列装置(STN)。 Alternatively, the liquid crystal device may be a rotation angle of the super twisted nematic device (STN) between 180 ° and 270 °. 还可以使用其它类型的LCD,如铁电LCD。 Also other types of LCD, such as a ferroelectric LCD.

衬底14和16可由光学透明的,具有较低双折射的,并在可换向光学装置的制造和使用中所遇条件下具有适当的空间稳定性的玻璃或塑胶材料制成。 16 and the substrate 14 may be optically transparent, it has low birefringence, and interchangeable with appropriate dimensional stability of glass or plastic material in the manufacture and use under the conditions encountered in an optical device. 为了维持衬底之间均匀的空间,必须使用几个已知的间隔方法的一种。 To maintain a uniform space between the substrates, you must use one of several known spacing methods. 例如,可将玻璃小球或和纤维结合在衬底之间的空腔中,或对至少一个衬底进行模制以形成如在美国专利第5,268,782号中所述的整体的空间。 For example, glass beads and fibers, or may be incorporated in a cavity between the substrate, or the substrate is at least one integrally molded to form a space as described in U.S. Patent No. 5,268,782 in.

参考图1,反射偏振器32和34分别放置于衬底14和16的外部表面上。 Referring to FIG 1, reflective polarizers 32 and 34 are placed on the outer surface of the substrate 14 and 16. 通常,本发明的反射偏振器具有将无规则偏振光分离成平面偏振分量的效应。 Typically, the reflective polarizer of the present invention has the effect of separating randomly polarized light into plane polarized component. 无规则偏振光可以被看作两个(具有偏振状态(a)和(b))大小相同的正交的平面偏振的分量的总和。 Random polarized light can be considered as two (having a polarization state (a) and (b)) the sum of the same size as the plane orthogonal polarization component. 在最适宜的条件下,反射偏振器透射所有具有与偏振器延伸方向正交的偏振状态(a)的光线,并反射具有偏振状态(b)的光线。 Under optimum conditions, the reflective polarizer transmits all light having polarization state (a) orthogonal to the extending direction of the polarizer, and reflects light having polarization state (b) is. 可将反射偏振器32的偏振方向取向为和如由箭头30表示的液晶12的准直方向平行(e模式)或正交(o模式)。 May be oriented in the direction of polarization of the reflective polarizer 32 and the collimation direction of the liquid crystal 12 as represented by arrow 30 is parallel to (e mode) or orthogonal (o mode). 反射偏振器32和34的偏振方向可相互正交(交叉)或平行。 The polarization direction of the polarizer 32 and the reflector 34 may be orthogonal to one another (crossed) or parallel.

装置8最好还包含双折射补偿薄膜(图中未示),如光学延迟器,比如负双折射光学延迟器。 8 apparatus preferably further comprises a birefringent compensation film (not shown), such as an optical retarder, such as a negative birefringent optical retarder. 将双折射补偿薄膜设置在衬底14和反射偏振器32和/或衬底16和反射偏振器34之间。 The birefringent compensation film is provided between the substrate 14 and the reflective polarizer 32 and / or the substrate 16 and reflective polarizer 34. 这样的薄膜使装置在可见波长范围内和在偏离角上保持想要的光学特性。 Such that the film holding device and the optical characteristics desired in the off angle in the visible wavelength range.

图2是一个较佳的反射偏振器36的部分的略图。 FIG 2 is a preferred portion of the reflective polarizer 36 is omitted in FIG. 本图包含一个坐标系38,指出x,y,z方向。 This figure contains a coordinate system 38, noted x, y, z directions. 反射偏振器36是两种不同材料的交变层的多层叠准。 The reflective polarizer 36 is a multilayer of alternating layers of quasi-two kinds of different materials. 在附图和描述中这两种材料被称为材料“A”和材料“B”。 In the drawings and the description of these two materials it is called a material "A" and material "B". 材料A和材料B的邻近的薄层41和43包含一个作样品的薄层对(lay pair)44。 Adjacent sheet materials A and B containing 41 and 43 as a thin layer on the sample (lay pair) 44. 薄层对44沿x方向在相邻的薄层41和43之间出现折射率的差异,而沿y方向基本上没有折射率的差异。 Difference in refractive index occurs between the thin sheet 41 adjacent pair 44 and 43 in the x direction, the y-direction and substantially no difference in refractive index.

在本发明的装置的一个较佳实施例中,第一和第二反射偏振器中每一个都包含材料A和材料B的交变的薄层的多层叠层,其中每一层的平均厚度不超过0.5μm。 In a preferred embodiment of the device according to the present invention, the first and second reflective polarizers each comprise a multilayered stack of alternating thin layers of materials A and B, wherein the average thickness of each layer is not more than 0.5μm. 和材料B层相邻的材料A层包含一个薄层对。 And a layer of material B comprises a layer of material A adjacent to a thin pair. 薄层对的数量宜在从大约10到2000,最好是在大约200到1000的范围内。 A thin layer is preferably in the amount of from about 10 to 2000, preferably in the range of about 200 to 1000.

通过将材料A和材料B挤压成薄层片形成多层薄片(multilayered sheet)定义拉伸比值为拉伸后尺寸除以拉伸前的尺寸值。 Forming a multilayer sheet (multilayered sheet) is defined as the ratio of the stretched dimension value before the stretching after stretching divided by the size of the materials A and B extruded into thin sheets. 拉伸比值宜在从2∶1到10∶1的范围中,较好是在从3∶1到8∶1,最好是4∶1到7∶1的范围内,比如6∶1。 Stretching ratio is preferably in the range from 2:1 to 10:1, it is preferred from 3:1 to 8:1, preferably in the range of 4:1 to 7:1, such 6:1. 薄片沿y方向没有明显的延伸。 No significant sheet extending in the y-direction. 材料A选择一种聚合材料,以产生应力感应的双折射率,或以拉伸改变折射率。 A material selected polymeric material to produce a stress-induced birefringence or refractive index change to stretch. 例如,一个材料A的单轴拉伸的薄片可具有一折射率,nAx,它和拉伸方向有关(例如nAx=1.88),和一不同的折射率nAy,它和横向方向有关(例如nAy=1.64)。 For example, a uniaxially stretched sheet of material A may have a refractive index, nA, and it is related to the stretching direction (e.g. nAx = 1.88), and a refractive index different from NaY, and a transverse direction about it (e.g. nAy = 1.64). 材料A在拉伸和横向方向的折射率(nAx-nAy)显得有差异,至少0.05,宜为至少0.10,再好些为至少0.20。 A refractive index of the material stretching and the transverse direction (nAx-nAy) there appear differences, at least 0.05, at least 0.10 is desirable, again better at least 0.20. 材料B选择一种聚合的材料,它的折射率,nBy,在多层薄膜被拉伸后大致上等于nAy。 Material B and a polymeric material having a refractive index, NBY, after the multilayer film is stretched substantially equal to nAy. 当拉伸时,nBx最好减小。 When stretched, nBx preferably reduced.

在拉伸后这个实施例的多层薄片(multilayered sheet)与拉伸方向(定义为Δnx=nAx-nBx)有关的相邻薄层之间的折射率显示出较大的差异。 The multilayer sheet (multilayered sheet) in this embodiment, after the stretching to the stretching direction (defined as Δnx = nAx-nBx) relating to a refractive index between adjacent sheet showed a large difference. 但是沿横向方向,相邻的薄层之间折射率的差异大体上为零(定义为Δny=nAy-nBy)。 However, in the transverse direction, the difference in refractive index between the adjacent thin layers is substantially zero (defined as Δny = nAy-nBy). 这些光学性能使多层叠层作为一个反射偏振器,它将传输与图2中显示的传输轴40平行的任意偏振光的偏振分量,该分量和。 These optical properties of the multilayer stack as a reflective polarizer, any component of polarized light parallel to the transmission axis 40 and will transmit shown in FIG. 2, and the component. 由反射偏振器36传输的光线部分被认为具有偏振状态(a)。 Part of the light transmitted by the reflective polarizer 36 is considered to have polarization state (a). 不穿过反射偏振器36的光线部分具有偏振状态(b),它和图2中所示的消光轴(extinction axis)42对应。 The light does not pass through reflective polarizer 36 has polarization state portion (b), and which corresponds to extinction axis 42 (extinction axis) as shown in FIG. 消光轴平行于拉伸方向x。 Extinction axis is parallel to the stretch direction x. 因此,(b)-偏振光遇到折射率差Δnx,导致它的透射。 Accordingly, (b) - polarization encounters a refractive index difference Δnx, which results in transmission. 反射偏振器宜至少对(b)-偏振光50%反射,更好是至少90%反射。 Reflective polarizer should be at least (b) - 50% of the polarized light reflected, more preferably at least 90% reflective. 第三个折射率差,Δnz,对控制反射偏振器的离轴的反射是重要的。 The third refractive index differential, Δnz, is important for controlling the reflection of off-axis reflective polarizer. 对于(b)-偏振的高消光率,以及(a)-偏振光的高透射,在较大的入射角度时,Δnz=nAz-nBz<0.5Δnx是较好的,小于0.2Δnx更好,最好是小于0.1Δnx。 For (b) - a high polarization extinction ratio, and (a) - high transmission polarization, at larger incident angle, Δnz = nAz-nBz <0.5Δnx is preferably less than 0.2Δnx better, most good is less than 0.1Δnx.

这种反射偏振器的光学行为和设计在1995年3月10日申请的题为“光学薄膜”的代理人的在审查中的美国第08/402041号专利中更详细地描述。 Such optical behavior and design of the reflective polarizer described in U.S. Patent No. 08/402041 entitled agents filed July 10, 1995 "optical film" in the review in greater detail.

一个普通的技术人员能够选出获得想要的折射率关系的适合的材料。 An ordinary skill in the art can select suitable material to obtain the desired refractive index relationship. 通常,从半透明的聚合材料,例如一种半透明的奈烷二羧酸多元酯或聚乙烯苯二甲酸盐(PEN)和它们的异构体(如,2,6-,1,4-,1,5-,2,7-,和2,3-PEN)中选出材料A。 Typically, the translucent polymeric material, for example, a translucent Nai alkyl dicarboxylic acid polyesters, or polyethylene terephthalate (PEN) and isomers thereof (e.g., 2,6-, 1,4 -, 1,5-, 2,7-, and 2,3-PEN) material selected from A. 还可以从其它的半透明聚合材料,例如聚乙烯异苯甲酸盐(PEI),和PEN,PET,和PEI的共聚体中选出材料A。 It may also be, for example, polyvinyl isobutyl benzoate (PEI), and PEN, PET, PEI, and interpolymers material selected from other translucent polymeric material A. 如这里所使用的,coPEN包含PEN的共聚合体,coPET包含PET的共聚合体。 As used herein, coPEN comprises of copolymer of PEN, coPET of copolymer comprising of PET. 材料B可以是一种半晶态或无定形聚合材料,例如间同立构的聚苯乙基(sPS),和共聚物,如,Eastar的coPEN,coPET,和共聚物,它可以Eastman化学公司购用的聚环己烷二甲脂对苯二酸盐所述coPEN还可以是粉末的混合物,其中至少一种成分是聚合体,该聚合体以苯甲酸二羧酸作为基础,而其它成分是另外的多元脂或者聚碳酸盐,例如PET,PEN或coPEN。 Material B may be a semi-crystalline or amorphous polymeric material, such as syndiotactic polystyrene of ethyl (of sPS), and copolymers, such as, Eastar of coPEN, coPET, and copolymers, which can Eastman Chemical Company commercially available cyclohexanedimethanol with polyethylene terephthalate the aliphatic coPEN may also be a powder mixture, wherein the at least one component is a polymer, the polymer acid to dicarboxylic acid as the basis, while the other component is additional aliphatic polyols or polycarbonate, for example PET, PEN or coPEN. 材料A和B最好选择具有类似的流变学特性(例如熔融粘度),这样它们能被挤压成一体。 Materials A and B is preferably selected to have similar rheological properties (e.g., melt viscosity), so that they can be extruded integrally.

通过共同挤压材料A和材料B以形成多层薄膜然后通过在所选温度下大体上沿一个方向(单轴)将其拉伸来确定薄膜的方向,或者随后在所选温度下加热,制备反射偏振器。 By co-extruding materials A and B to form a multilayer film is then determined by the tensile direction of the film at a chosen temperature substantially in one direction (uniaxial), or at a selected temperature followed by heating to prepare a reflective polarizer. 薄膜可以沿交叉拉伸的方向(正交的)在从交叉拉伸尺寸的自然衰减(等于拉伸比的平方根)到交叉尺寸无衰减的值(等于完全约束)的范围空间地松弛。 Film may be stretched in a direction intersecting (perpendicular to) the size of the natural decay of relaxation from the cross stretch (equal to the square root of the stretch ratio) to the cross size without attenuation value (equal to the fully constrained) range spatially. 薄膜可以沿机械加工方向拉伸(如用长度定向器时),或沿宽度方向拉伸(如用拉幅器时)。 Film may be stretched in the machine direction (e.g., when the length orienter), or stretched (such as when using a tenter) in the width direction.

显然,对一个普通的技术人员来说,要选择一个处理变量的组合,如拉伸温度,拉伸比,加热装置温度和交叉拉伸松驰以产生一个具有想要的折射率关系的反射偏振器。 Clearly, one of ordinary skill to select a combination of process variable, such as stretching temperature, draw ratio, heater temperature and cross-stretch relaxation to produce a reflective polarizer having the desired refractive index relationship of device.

在一个特别的实施例中,多层的薄片包含如上所述的材料A和B的薄层对的叠堆,其中这种叠堆被分成一个或更多的段的薄层对。 In one particular embodiment, the sheet comprises a thin layer of the multilayer stack of materials A and B described above, wherein this stack is divided into one or more segments of the sheet pair. 每一段通过使每个薄层对的结合厚度大约是每段的带宽的中心波长的一半,设计为光线具有该带宽的最大反射率。 Each section of each sheet by the combined thickness of the center of each segment is approximately half the wavelength bandwidth, the design having maximum reflectance for the light of the bandwidth. 具有不同薄层对厚度的段的组合允许反射偏振器反射具有相对较大带宽的光线。 A thin layer having a different combination of sections allows the thickness of the reflective polarizer reflects light having a relatively large bandwidth.

例如,多层薄片可包含十段,薄层对的结合厚度范围从100nm到200nm。 For example, the multilayer sheet may include ten segments, the binding of a thin layer of a thickness ranging from 100nm to 200nm. 每段可包含10和50个之间的薄层对。 Each segment may comprise a thin layer of between 10 and 50. 这个偏振器能够反射波长从400到800nm的范围中的光线。 This polarizer is capable of reflecting light from the wavelength range of 400 to 800nm ​​in. 另一方面,薄层对厚度可以连续地在100至200nm内分级。 On the other hand, the sheet may be continuously graded in a thickness of 100 to 200nm. 对波长在400和2000nm的光可达范围,对的厚度应在100-500nm的范围内。 In light of the range of up to 400 and 2000nm, and should have a thickness within the range of 100-500nm wavelengths.

虽然如上所述的多层光学薄膜对反射偏振器来说是较好的,但仍可使用其它的反射偏振器,例如细微结构的MacNeille偏振器和设置有的四分之一波片的胆甾型偏振器。 Although the multilayer optical film reflective polarizer as described above is preferred, but still other reflective polarizers, such as cholesterol fine structure MacNeille polarizer and quarter-wave plate disposed some steroid polarizer.

反射偏振器可以层迭到LCD或者在LCD的边缘附在LCD上或用机械方式紧固在LCD上。 The reflective polarizer can be laminated to the LCD or the edge of the LCD on the LCD or attached mechanically fastened on the LCD.

再参见图1,可以使用一个驱动电子学系统,例如通过引线21和23的电源19,通过导电层20和22给液晶材料18施加一个电场。 Referring again to FIG. 1, may be used a drive electronic system, such power source 19 via leads 21 and 23, an electric field 20 through the conductive layers 22 and 18 is applied to the liquid crystal material. 当施加了电场后,由于分子的电介质各向异性导致整个区域上的液晶分子被重新确定方向和“松开”。 When the electric field is applied, because the dielectric anisotropy of liquid crystal molecules in the entire region molecules reorienting and "loose." 这种性能允许当在扭曲状态时分子将偏振光旋转90°,当在非扭曲状态时,不旋转地透射光线。 This capability allows the twisted state when the molecular rotation of the polarization 90 °, when in a non-twisted state, to transmit light without rotation. 当和反射偏振器32和34一起使用时,旋转偏振光的能力提供了用于在反射状态和透射状态之间转换可转换的光板10的装置。 When the polarizer 32 and the reflector 34 and used together with the ability to rotate polarized light provides a means for between the reflective plate and a transmissive state transition state switchable 10.

对于相同的反射偏振器对,当从透射状态转换到反射状态时(忽略聚合体和导电材料的前后表面的反射)光板的反射率成为大约两倍。 For the same reflection polarizer pair when switching from a transmission state to a reflection state (ignoring front and back surface of the reflector body and the polymeric conductive material) of the light reflection plate becomes about twice. 反射率的值随反射偏振器的品质变化很小。 Quality value of reflectance with little change reflective polarizer. 但是,透射和反射状态的透射率极大地依赖于两个偏振器的消光值。 However, the transmittance of the transmission and reflection state greatly depends on the extinction value of the two polarizers. 对每一个有漏光的偏振器,以较高消光偏振的50%(理想的消光是100%)消光而言,在透射状态光板的透射为75%,而在反射状态为50%。 For each light leakage of the polarizer, 50% of the high extinction polarization (light extinction preferably 100%) extinction, the state of light transmission in the transmissive plate was 75%, and 50% in the reflective state. “漏光”光板的透射比仅为1.5。 "Light leakage" light transmittance plate is only 1.5. 透射比为1.5的光板虽然在作为保密光闸中不太有用,但仍然可以在建筑物或汽车的窗上提供有效的能量控制。 Although the transmittance, but still provide effective control of the energy of the light shutter plate 1.5 in less useful as confidential on buildings or automobile windows. 对99.9%消光的较好的偏振器,在关闭状态下透射仅为0.1%,而在透射状态下约为50%的透射,产生大小为500的透射比。 99.9% extinction of the polarizer is preferably in the closed state of the transmission is only 0.1%, while about 50% transmission in the transmissive state, a size of 500 transmittance.

给出的偏振器的消光值依赖于用户感性趣的光波带宽。 Extinction polarizers given optical bandwidth depends on the user's sense of sexual interest. 窄带宽对于激光的应用是足够的。 For a narrow bandwidth laser is sufficient. 保密窗口(privacy window)的带宽必须覆盖至少所有可见光谱,而太阳能的控制窗口要覆盖可见的和近红外线部分的光谱(400-1200nm)。 Privacy window (privacy window) bandwidth must cover at least all of the visible spectrum, while solar energy control windows to cover the visible and near infrared portions of the spectrum (400-1200nm). 如上所述的多层薄膜(multilayer film)反射偏振器能够覆盖上述带宽中的任一种。 The multilayer film (multilayer film) described above, a reflective polarizer capable of covering any of the above bandwidths.

为了描述转换的概念,图3显示了一个可转换光板46的简略的透射图,其中包含了偏振状态(a)和(b)的任意偏振光的射线48入射到反射偏振器50。 In order to describe the concept of conversion, FIG. 3 shows a schematic of FIG converted light transmittance plate 46, which comprises a polarization state (a) any and (b) polarized light ray 48 is incident on the reflective polarizer 50. 射线48中所包含的光线中,具有偏振状态(b)的光线(由射线52表示)被反射,而具有偏振状态(a)的光线(由射线54表示)由反射偏振器50透射。 48 in light rays contained in the light having polarization state (b) (represented by ray 52) is reflected, while light having polarization state (a) (represented by ray 54) is transmitted by reflective polarizer 50. 在存在电场时,液晶56使射线54的偏振状态旋转大约90°,此后它由反射偏振器58透射(它相对于反射偏振器50正交)。 In the presence of an electric field, liquid crystal 56 causes the polarization state of ray 54 rotated approximately 90 °, after which it is transmitting by the reflective polarizer 58 (which is orthogonal with respect to reflective polarizer 50). 因此,具有正交的反射偏振器50和58的可转换光板大体上是透射的。 Thus, the reflective polarizer may convert light having a perpendicular plate 50 and 58 is substantially transmissive. 这称之为“正常开放”状态。 This is called "normal open" state. 在最适宜的条件下,光学可转换薄膜为50%透射。 Under optimum conditions, the optically switchable film is 50% transmissive. 由于剩余吸收,偏振的不完全旋转,前后反射,以及来自导电层(图中未示)的反射,透射通常在从大约25到40%的范围中。 Since the residual absorption, incomplete rotation of polarization, front and back reflections, and reflection from the conductive layer (not shown), the transmittance is usually in a range from about 25 to 40% of.

当如图4给可转换光板46施加了电场时,射线48再一次由反射偏振器50分为透射射线(以射线55表示)和反射射线53。 4 when the switchable to an electric field applied to the light panel 46, radiation 48 again by the reflective polarizer 50 into transmitted ray (indicated by ray 55) and reflected rays 53. 在这种情形下,射线55不旋转地穿过液晶56,并由反射偏振器58反射。 In this case, radiation 55 passes through the liquid crystal 56 is not rotated, reflected by the reflective polarizer 58. 以射线60表示的反射光再次不旋转地穿过液晶56,最后由反射偏振器50透射。 60 represents the reflection of rays of light is again passed through the liquid crystal 56 is not rotated, and finally transmitted by the reflective polarizer 50. 因此,在这种状态可转换光板46几乎是全部可反射的。 Thus, in this state, plate 46 can be converted almost all of the light can be reflected. 导电层和反射偏振器中的吸收损失较小,如≈1-5%。 Conductive layer and the absorption loss in the reflective polarizer is small, such as ≈1-5%.

可以理解,通过将反射偏振器50和58相互平行而不是正交地放置,可以变换可转换光板46的光行为(即当施加电场时光板为可透射的,而无电场时为反射的)。 It will be appreciated by the reflective polarizer 50 and 58 parallel to each other, rather than orthogonally placed, can be converted light conversion behavior of the light plate 46 (i.e., the time when an electric field is applied to the transmissive plate, no electric field is reflected). 这称之为“正常闭合”状态。 This is called "normally closed" state.

另一方面,也许想要可转换光板的反射率对灰度是可调整的。 On the other hand, you may want to be converted light reflectance of the gray plate is adjustable. 可以通过使用一个扭曲向列型液晶装置以及改变施加的电压以调整透射光强度,获得这种可调整性。 By using a twist to adjust the intensity of the transmitted light nematic liquid crystal device and a voltage change applied to obtain such adjustability. 这种方法可能比较困难,因为均匀的灰度需要衬底精确的的放置和在较大区域的液晶分子的的排列,以及的温度和电场。 This approach may be difficult, because a uniform gray scale requires accurate placement of the substrate and the arrangement of liquid crystal molecules in a larger area, and the temperature and electric field. 这些条件中微小的变化会导致显示器中的反射率改变,产生有斑点的显示。 Minor variations of these conditions will result in a display change reflectivity, produce spots display. 另一方面,通过使用象素液晶和只转换象素的某一部分以向观看者给出灰度的显示(从远处),可以产生一个有效的灰度。 On the other hand, to give a gray-scale display (from a distance) to a viewer by using liquid crystal pixels and switching only a certain part of the pixel, can produce an effective gradation.

在另一个实施例中,可转换光板包含一对反射偏振器(如上所述的那些),并行配准并相互分开间隔放置以形成一个封闭的装入液晶材料的空腔,藉此,反射偏振器代替上述的液晶衬底进行工作。 In another embodiment, the switchable optical panel comprises a pair of reflective polarizer (as those described above), with the parallel spaced apart from each other and placed in registration to form a closed cavity into a liquid crystal material, whereby the reflective polarizer instead of the above work liquid crystal substrates. 可以理解,这个实施例包含导电层,准直层,扩散阻挡层和任何其它和前面实施例的衬底相关的适合的元件。 It will be appreciated that this embodiment comprises a conductive layer, an alignment layer, a diffusion barrier layer and the front substrate, and any other suitable embodiment of the device related to embodiment.

本发明的其它实施例可在光学作用层中包含除了上述的液晶装置之外的各种双折射的材料,这些材料包含单轴取向的双折射热塑性物质和可转换聚合体-色散液晶装置(如第4,435,047号美国专利中所揭示的那些)。 Other embodiments of the present invention may contain in addition to the above-described liquid crystal device of the birefringent materials in the optically active layer, which material comprises uniaxially oriented birefringent thermoplastics and switchable polymer - dispersion liquid crystal device (e.g. No. 4,435,047 that) disclosed in U.S. Pat. 根据双折射材料的性质以及在其中使用薄膜的应用选出用于将薄膜从反射状态转换到反射状态的装置。 Means for converting the film from the reflective state to a reflective state is selected according to the properties of the birefringent material and the application in which the film is used. 举例来说,用于转换的装置可包含拉伸光学作用层以改变它的双折射,或将光学作用层从反射偏振器之间移动,以防止平面偏振光的旋转。 For example, the means for converting may comprise the drawn optical active layer to alter its birefringence, or the optical active layer from moving between the reflective polarizer, to prevent rotation of plane polarized light.

图5是本发明的可转换窗口62的略图。 FIG 5 is a transition window 62 of the present invention is omitted in FIG. 窗口62包含一对透明的窗玻璃64和66以及在窗玻璃之间的可转换光板68。 A pair of transparent window 62 comprises a window glass 64 and 66 and is switchable between a light panel glazing 68. 如上所述的可转换光板68宜包含液晶装置70(该装置包含一对在并行配准的透明的平面衬底72和74中),液晶材料在衬底之间的空腔中,以及放置于衬底72和74的内部表面上的导电层78和80。 68 should be converted light panel comprising a liquid crystal device 70 described above (the device comprises a pair of parallel registration transparent planar substrates 72 and 74), the liquid crystal material in the cavity between the substrate and placed in conductive layer on the inner surface 78 of the substrate 72 and 74 and 80. 反射偏振器82和84分别放置于衬底72和74的外部表面上,而且可相互正交或者平行。 82 and the reflective polarizer 84 are placed on an exterior surface of the substrate 72 and 74, but may be parallel or orthogonal to each other. 吸收偏振器86和88宜放置于反射偏振器82和84的表面(如图5中所示),每一个吸收偏振器的偏振方向和在其上所放置的反射偏振器的偏振方向平行。 Absorptive polarizer 86 and the reflective polarizer 88 should be placed on the surfaces 82 and 84 (shown in FIG. 5), each polarization direction of the absorption polarizer and the polarization direction thereof in parallel is placed on the reflective polarizer. 导电层78和80通过引线90和92之类的装置连接到电源94。 The conductive layers 78 and 80 are connected to the power means 92 and 94 via leads 90 or the like.

透明窗玻璃64和66可由玻璃或其它适合用在窗上的透明、坚硬、环境稳定的材料制成。 64 and 66 made of a transparent glazing or other suitable glass may be used on the window transparent, hard, stable environment material. 反射偏振器82和84中的每一个宜包含如上所述的和如图2中所示的交互的聚合材料层的多层叠层。 82 and the reflective polarizer 84 should be a multi-layer stack of each layer of polymeric material comprising interactive as described above and shown in FIG. 2. 吸收偏振器86和88可以是现有技术中熟知的几种类型中的任何类型,如根据碘或染色取向的聚乙烯醇的分光偏振器。 Absorbing polarizer 86 and 88 may be of several types known in the prior art of any type, such as iodine or dyed in accordance with the orientation of the polarizer beam splitter polyvinyl alcohol. 另一方面,吸收偏振器可被包含在反射偏振器的表皮层中。 On the other hand, absorbing polarizer may be included in the skin layer of the reflective polarizer.

图6a,6b,7a和7b描述了可转换窗62的操作。 FIG. 6a, 6b, 7a and 7b describe the operation of the switchable window 62. 在图6a中,通过引线90和92给施加电场,使液晶材料76如上所述“松开(untwist)”。 In Figure 6a, via leads 90 and 92 to apply an electric field, the liquid crystal material 76 as described above, "release (untwist)." 一任意偏振的户外光线的例示射线96,如太阳光(包含相等数量的偏振状态(a)和(b)),完全地经过窗玻璃64。 Outdoor embodiment of a randomly polarized light ray 96 is shown, such as sunlight (comprising an equal number of polarization states (a) and (B)), 64 completely through the glazing. 射线96的由反射偏振器82反射的那部分(对一个好反射偏振器来说接近50%)被表示为具有偏振状态(a)的射线98。 That part of the reflective polarizer 82 is reflected rays 96 (for a good reflective polarizer is close to 50%) is expressed as a radiation having polarization state (a) of 98. 表示为射线100的光线剩下的那部分(具有偏振状态(b))不旋转地经过吸收偏振器86和液晶70,最后由反射偏振器84和吸收偏振器88透射给户内的观看者。 As light ray 100 represents the remaining portion (having polarization state (b)) without rotating the polarizer through the absorber 86 and the liquid crystal 70, a reflective polarizer 84 and finally by the absorptive polarizer 88 and the transmission to a viewer in the household. 在这种状态下,由于窗为50%可透射,它被称之为“开放”状态。 In this state, since the 50% transmissive window, which is called the "open" state.

在相同状态中,如图6b中所示,任意偏振的户内光线的例示射线102经过窗玻璃66。 , As shown in Figure 6b in the same state, the user randomly polarized ray 102 illustrated embodiment the light 66 through the window glass. 射线102具有(a)偏振状态的成分在到达反射偏振器84之前由吸收偏振器88吸收。 Component rays 102 having (a) polarization state is absorbed by the absorbing polarizer 88 before reaching the reflective polarizer 84. 表示为射线104的光线的剩下的部分是(b)偏振状态的而且透射通过窗的剩下的部分。 Expressed as light ray 104 and the remaining portion is a transmissive window through the remaining part (b) polarization state. 因此吸收偏振器88吸收户内光线(否则该光线由反射偏振器84反射回室内)藉此防止不希望的反光镜现象。 Thus absorbing polarizer 88 absorbs light (or light reflected by the reflective polarizer 84 back to the room) indoor thereby preventing undesired phenomena mirror.

为了将窗62转换到反射(“关闭”)状态,删除电场从而液晶材料76回复到扭曲形态。 To convert to a reflective window 62 ( "closed") state, the liquid crystal material 76 and thus remove the electric field to return to distorted form. 在这种状态下,如图7a中所示,户外光线的例示射线106大约50%由反射偏振器82反射(被描述为“打开”状态)。 In this state, as shown in FIG. 7a, the embodiment illustrated outdoor light ray 106 from 82 to about 50 percent reflected by the reflective polarizer (described as "open" state). 反射光表示为具有(a)偏振状态的射线108。 The reflected light is represented as having (a) polarization state of radiation 108. 表示为射线110,具有(b)偏振状态的光线的剩下部分由吸收偏振器86透射,但由液晶70旋转到(a)偏振状态。 Represented as ray 110, light having the remaining portion (b) polarization state transmitted by the absorbing polarizer 86, but is rotated by the liquid crystal 70 (a) polarization state. 剩下的最后的光线由反射偏振器84反射,由液晶70再旋转,并由吸收偏振器86,反射偏振器82和窗玻璃64透射回室外。 Finally, the remaining light, and then reflected by the reflector 84 is rotated by liquid crystal polarizers 70, 86 by the absorbing polarizer, a reflective polarizer 82 and the pane 64 back to the outdoor transmission. 参考图7b,户外光线的射线112的(a)偏振状态成分由吸收偏振器88吸收,而(b)偏振状态成分(表示为射线114)由吸收偏振器86吸收。 Referring to FIG 7b, (a) the polarization state of the ray 112 outdoor light component is absorbed by the absorptive polarizer 88, and (b) the polarization state of the component (as represented by ray 114) is absorbed by the absorptive polarizer 86. 因此在“关闭”状态中的窗62对室外日光下的观看者呈现为镜子状,而对室内的观看者呈现为黑暗。 Therefore, the window in the "closed" state for 62 viewers under outdoor sunlight presented as mirror-like, while the interior of the viewer appear as dark.

在另一个实施例中,可转换的窗1 14在图8中描述。 In another embodiment, the switchable window 114 described in FIG. 窗包含光闸116,透明的窗玻璃118和反射偏振器120。 Window shutter 116 comprises a transparent window glass 118 and reflective polarizer 120. 光闸116包含透明窗玻璃122(其中一边上有双折射层124,另一边上有反射偏振器126)。 The shutter 116 includes a transparent window glass 122 (of which 124 on one side of the birefringent layer, the other side of the reflective polarizer 126). 双折射层124宜为聚合体薄片如PET。 Birefringent layer 124 is suitably a polymer sheet such as PET. 对最高透射,薄片是消色差(achromatic)1/2波长延迟器(retarder)或一个LCD。 Highest transmittance, the sheet is achromatic (achromatic) 1/2 wave retarder (retarder) or a LCD. 在任何情况下,应对薄层124为最大透射确定方向。 In any case, to cope with a thin layer 124 determines the maximum transmittance direction. 透射偏振器120和126正交。 Transmissive polarizer 120 and 126 orthogonal.

光闸116可旋转地安装在支点123上,例如在窗框上,从而可将光闸置于“开”的状态或“关”的状态。 The shutter 116 is rotatably mounted on a fulcrum 123, for example, in the window frame, so that the shutter may be placed in the "on" state or "off" state. 用于旋转的适合的装置包含手工的或机动的装置,例如,用于板廉的装置。 Suitable rotating means comprises a manual or motorized devices for, e.g., inexpensive means for the plate. 图8中显示了三个相同的,分开安装从而可自由旋转,但当机械关闭时可形成一个连续的板的光闸。 Figure 8 shows the same three separately mounted so as to be freely rotatable, but may be formed of a continuous plate mechanical shutter closed. 本发明的可转换的可只包含一个光闸,或包含多个光闸。 Convertible present invention may contain only one shutter, or a plurality of shutters. 透明窗玻璃118(在一个表面上有反射偏振器120)在一个固定的位置。 Transparent glazing 118 (with a reflective polarizer on a surface 120) in a fixed position.

在一个“打开”位置的例子中,旋转光闸从而双折射层124邻近反射偏振器120并与其平行。 In the case of a "open" position, the rotation of the shutter so as birefringent layer 124 adjacent the reflective polarizer 120 and parallel thereto. 在这个位置双折射层124位于反射偏振器120和126之间。 In this position between the birefringent layer 124 and the reflective polarizer 120 126. 因此由于由双折射层124的平面偏振光的旋转,射入窗114的任意偏振光射线以和为可转换窗的前面实施例所描述的同样的方法,一部分被透射而一部分被反射。 Thus since the birefringent plane-polarized light rotating layer 124, and an arbitrary polarized light rays in the same manner as described in Example foregoing embodiments can convert incident window of the window 114, a portion is reflected and a portion is transmitted. 在一个相应的的“关闭”位置,旋转光闸从而反射偏振器120邻近反射偏振器126并与其平行,双折射层124偏离反射偏振器120。 In a corresponding "off" position, thereby rotating the shutter reflective polarizer 120 adjacent the reflective polarizer 126 and parallel to, the birefringent layer 124 deviated from the reflective polarizer 120. 在这个位置,双折射层124不在影响由反射偏振器120和126透射的平面偏振光的旋转的位置上。 In this position, the birefringent layer 124 does not affect the position of the plane of rotation transmitted by the reflective polarizer 120 and 126 of the polarized light. 由于反射偏振器120和126是正交的,由一个反射偏振器透射的平面偏振光由另一个反射偏振器反射,导致当不论从室外还是从室内看,大体上都是可反射的。 Since the reflective polarizers 120 and 126 are orthogonal to the plane of light transmitted by a reflective polarizer polarized light reflected by another reflective polarizer, irrespective of when the lead from the outside or from the chamber, substantially all of the reflective.

或者,在反射偏振器120的内部(观察者的那边),或在反射偏振器126和窗玻璃122之间或者在它们两者上至少放置一个吸收偏振器。 Alternatively, in the interior (the observer's side), or at least one absorbing polarizer is placed between the reflective polarizer 126 and the windshield 122, or both, in the reflective polarizer 120. 吸收偏振器的偏振方向平行于邻近它的反射偏振器的偏振方向。 Absorbing polarizer polarization direction parallel to its adjacent reflective polarizer polarization direction. 吸收偏振器提供了一个如在前面的实施例中描述的反反射特性。 Absorbing polarizer provides an anti-reflection characteristics as described in the previous embodiment.

本实施例的一个特别的特点是不论窗是“开放”还是“关闭”状态,光闸总是关闭的以形成连续的板面。 A particular feature of the present embodiment is whether the window is "open" or "closed" state, the shutter is always closed to form a continuous board. 这一特点给窗提供了从视野的任一角度的良好的透射,并提供了比如果光闸实际打开更好的热的绝缘。 This feature provides a good window to the transmission from any angle of field of view, and is provided than if the shutter actually opens better thermal insulation.

图9是透射反射光学显示器128的略图,该显示器包含液晶显示(LCD)装置130,背景光132,光学漫射器134,和可转换xx.透射反射器136。 9 is a transflective optical display thumbnail 128, the display comprises a liquid crystal display (LCD) device 130, backlight 132, an optical diffuser 134, and XX can be converted. Transflector 136. 典型地,如由考察者129平视的话完整的透射反射的光学显示器128将是平面的和矩形的,在截面中相对较窄(组件相互地接近)。 Typically, as the inspection head 129 are complete, then a transflective optical display 128 will be planar and rectangular in cross section is relatively narrow (component close to each other). 光学显示器128还包含用于在反射状态和透射状态之间转换xx.透射反射器的电子装置(图中未示),如前面所述的电源和引线。 The optical display 128 further comprises means for converting between a reflective state and a transmissive state XX. Transmissive reflector of the electronic device (not shown), as previously described, and power leads.

LCD装置130是一种熟知的构造,包含前吸收偏振器138,后吸收偏振器140和象素液晶嵌板142。 LCD device 130 is a well known configuration, absorbing polarizer 138 comprises a front, rear absorbing polarizer 140 and the pixel of the liquid crystal panel 142. LCD装置被设计为通过象素区域(可由地址电极通过现有技术熟知的方法来接通和断开)的方式显示信息和图像。 LCD device is designed by the pixel area (address electrodes may be switched on and off by a method well known in the prior art) and the displayed image information.

背景光132可以是反射室中的场致发光板,冷阴极荧光灯,或耦合到光导上。 Backlight 132 may be a reflective electroluminescent plate chamber, a cold cathode fluorescent lamp, or coupled to the lightguide. 背景光应有较低的吸收率并被漫射。 It should have a low background light absorption and diffusion.

光学漫射器134促进了在视角的较大范围看到LCD。 The optical diffuser 134 facilitates seen in the larger range of viewing angles of the LCD. 典型地,光学漫射器134是偏振维护材料例如在非双折射的基膜中透明的球面的点的薄片。 Typically, an optical diffuser sheet 134 is polarization maintaining point in a non-transparent material such as a birefringent spherical base film. 如果漫射器不维护偏振,分光偏振器140将吸收更多光线。 If the diffuser does not maintain polarization, the polarization beam splitter 140 will absorb more light.

可转换透射反射器136包含光学反射偏振器144,非象素液晶装置146和反射偏振器148。 Switchable reflector 136 includes an optical transmissive reflective polarizer 144, the non-pixel liquid crystal device 146 and the reflective polarizer 148. 反射偏振器144(如果使用)的偏振方向必须平行于吸收偏振器140的偏振方向。 144 (if used) in the direction of polarization of the reflective polarizer to be parallel to the direction of polarization absorbed by the polarizer 140. 液晶装置包含它们装入了液晶材料154前衬底150和后衬底152。 The liquid crystal device includes a front substrate 154 are charged with the liquid crystal material 150 and the rear substrate 152. 非象素液晶装置也包含连续的透明的导电层156和158,它们使可转换的透射反射器的全部的区域以前面所述的方式在反射和透射状态之间以电子方式转换。 All non-pixel region of the liquid crystal device also comprises a continuous transparent conductive layers 156 and 158, which make a switchable transflector according to the foregoing mode switching electronically between the reflective and transmissive state. 液晶装置146也包含准直层(图中未示),该层提供了和前衬底相关的前调准方向以及和后衬底相关的后调准方向。 The liquid crystal device 146 also includes alignment layer (not shown), the alignment layer provides a front and rear direction of alignment directions and the associated front substrate and the rear substrate.

反射偏振器144和148都宜是两种不同材料的交变化薄层的多层叠堆,如参考图2所述的那样。 Reflective polarizer 144 and 148 are two kinds of multilayer stack should be thin deposit of material different variations, such as the 2 as described with reference to FIG. 反射偏振器144和148最好每个都包含在前面所述的结构中的PEN和coPEN的交变薄层的叠堆。 Reflective polarizer 144 and 148 preferably each comprise alternating PEN and coPEN in front of the thin layer of the stack structure.

通常,当LCD装置130由背景光132明亮时,可转换透射反射器136是透射的。 Typically, when light 130 from the bright background of the LCD device 132, 136 switchable transflector is transmissive. 当关掉背景光132且在环境光中看LCD装置时,可转换透射反射器136是反射的,从而增加显示的亮度和对比度。 When the background light 132 switched off and, when viewed in ambient light LCD device, switchable transflector 136 is reflected, thereby increasing the display brightness and contrast. 透射反射光学显示器128的操作在图10和11中描述。 Transflective optical display operation 128 described in FIGS. 10 and 11.

图10中所示,在xx.transfoective光学显示器128的较佳背光照亮模式中,给xx.透射反射器136施加电场而且反射偏振器144和148平行。 As shown in FIG. 10, in the preferred xx.transfoective backlit optical display mode 128, to XX. Transflector 136 and applying an electric field 144 and the reflective polarizer 148 in parallel. 保包含偏振状态(a)和(b)的任意偏振光的例示射线164由背景光132产生。 Ray 164 illustrates security polarization state comprising (a) any and (b), polarized light 132 is generated by the background. 由于施加给可转换的透射反射器的电压使其中的液晶材料“不扭曲”,有(b)偏振状态的射线164的那部分由可转换的xx.透射反射器136不旋转地透射,并且反射偏振器144和148的偏振方向平行。 Since the voltage transflector may be converted is applied to the liquid crystal material which is "not twisted", there are (b) the polarization state of that part of radiation 164 of transmissive reflector 136 does not rotate transmitted by the switchable xx, and the reflection polarizer 144 and the polarization direction 148 parallel. 表示为168的透射光穿过漫射器134,具有将由反射偏振器140透射正确的偏振状态。 168 represents a transmittance of light through the diffuser 134, by having the reflective polarizer transmits 140 the correct polarization state. 同时,表示为166,有(a)偏振状态的射线164的那部分由反射偏振器148反射,并回到背景光,在那里它被散射和消偏振。 Meanwhile, it denoted 166, has a radiation portion (a) of the polarization state 164 is reflected by the reflective polarizer 148, and back to the background light, where it is scattered and depolarized. 该光线将从背景光132以射线170再次出现,并由可转换的xx.透射反射器136部分地透射和部分地反射。 In light of the background light rays 132 from 170 again, it may be converted by XX. Transflector 136 is partially transmitted and partially reflected. 由以这种方式的重复的反射和消偏振,来自背景光132的光线的较大部分最终“再循环”,并以正确的偏振状态穿过可转换的xx.透射反射器136。 Repeating reflection and depolarization in this manner, a large portion of light from the backlight 132 final "recycle", and the correct polarization state to pass through the switchable xx. Transflector 136.

应注意在可转换的xx.透射反射器136中如果液晶板146在施加电源的状态完全不旋光(即所有由反射偏振器148透射的光都不旋转),就不需反射偏振器144。 Note that in the switchable XX. Transflector 136. If the liquid crystal panel 146 in the state of the optical power is applied completely (i.e., all transmitted light by the reflective polarizer 148 do not rotate), the reflective polarizer 144 without. 但如果当施加了电场时液晶板146保持双折射,则通常由可转换的透射反射器136透射的可见光的某些部分将相对吸收偏振器140有正确的偏振状态。 However, if the liquid crystal when an electric field is applied to maintain the birefringence plate 146, typically by certain portions of the transmission of visible light switchable transflector 136 opposite the absorbing polarizer 140 has the correct polarization state.

如图11中所示,在同样的xx.透射反射光学显示器的环境光照亮模式中,关掉背景光132,而且不给可转换xx.透射反射器136施加电场。 As shown in FIG. 11, in the same XX. Transflective optical display illuminated by ambient light mode, turn off the backlight 132, and not be converted to XX. Transflector 136 applying an electric field. 因此,可转换透射反射器136在反射状态,如前面参考图4描述的那样。 Thus, in the reflective state 136 can be converted, as described previously with reference to FIG. 4 transflector. 任意偏振的周围的光线的例示射线172由吸收偏振器138部分地透射和部分地反射。 Randomly polarized light around exemplified by the ray absorbing polarizer 172 transmitting part 138 and partially reflected. 如果射线72射入LCD130的净象素,光线由吸收偏振器138透射的部分(表示为射线174,具有偏振状态(b))将也由吸收偏振器140透射。 If the rays incident LCD130 net 72 pixels, the light absorbing polarizer transmissive portion 138 (represented as ray 174 having polarization state (b)) will be transmitted by the absorbing polarizer 140. 射线174继续通过漫射器134,并由136反射,以和它离开时同样的偏振状态回到吸收偏振器140。 Ray 174 continues through diffuser 134 by reflector 136, in the same polarization state and when it exits the polarizer 140 back to the absorber. 射线174透射回LCD130,产生亮象素给观看者的眼睛。 Ray transmission 174 back LCD130, produces bright pixels to the viewer's eyes. 如果射线172射入暗象素(图中未示),射线174将由吸收偏振器140吸收。 If the incident ray 172 dark pixels (not shown), radiation 174 by the absorption polarizer 140.

在本模式中,需要漫射器134以从各种视角使象素显得明亮。 In the present mode, it is necessary that the diffuser 134 to the pixel appears bright from various viewing angles. 如在背光明亮模式中,如果液晶板146正确地旋转大部分光线,可去除反射偏振器144。 As bright backlight mode, if the liquid crystal panel 146 rotated correctly most of the light, a reflective polarizer 144 may be removed. 反射偏振器148和吸收偏振器140之间的视差可导致由附近的暗象素中的光线的吸收引起的亮度的明显损失,因此尽可能地将漫射器134和液晶板146做得薄是重要的。 Reflective polarizer 148 and the disparity between absorptive polarizer 140 can result in significant loss of brightness due to the light absorbing dark pixels in the vicinity, and therefore the diffuser 134 as much as possible and the liquid crystal panel 146 is made thin important. 相应的,为了将反射偏振器148放得和吸收偏振器140更接近,删除反射偏振器144是有利的。 Accordingly, in order to put too reflective polarizer 148 and absorbed by the polarizer 140 is closer to delete the reflective polarizer 144 is advantageous.

在一个较佳实施例中,可转换xx.透射反射器包含一对反射偏振器,该偏振器作为限制液晶材料的衬底。 In a preferred embodiment, the switchable XX. Transflector comprises a pair of reflective polarizer, the polarizer of the liquid crystal material of the substrate by way of limitation. 这种结构在反射偏振器148和吸收偏振器140之间提供了最小的可能距离。 This structure 148 and the reflective polarizer 140 between the absorbing polarizer provides the minimum possible distance.

本发明的透射反射光学显示器还可以设计成反射偏振器144和148正交,或者如不使用反射偏振器144时吸收偏振器140和反射偏振器148正交的配置。 Transflective optical display of the present invention may also be designed as a reflective polarizer 144 and quadrature 148, 148 or 144 is disposed perpendicular to the absorption polarizer 140 and the reflective polarizer as a reflective polarizer is not used. 在这种情况下,可转换透射反射器在背光明亮模式中不加电源,在环境光明亮模式中有电源。 In this case, switchable transflector without backlighting in bright mode power supply, a power mode in bright ambient light.

在图9的光学显示器中,可转换透射反射器可以压制成片或类似地附在或装到背景光和/或LCD装置的背后。 In an optical display of FIG. 9, the conversion may be behind transflector may be compressed into tablets or similarly attached or mounted to the background light and / or LCD devices. 将可转换透射反射器压制成片装到背景光消除了它们之间的空隙,因此减小了否则在空气/可转换xx.透射反射器边界会发生的表面反射。 The converter may be compressed into tablets transflector is attached to the background light elimination of the gap between them, thus reducing the boundary surface reflection transflector otherwise occur at the air / switchable xx.. 这些反射减小了想要的偏振的总透射。 These reflection reduce the total transmission of the desired polarization.

现在将由下面的例子对本发明更详细地描述。 The following examples will now be described the present invention in more detail. 所有的尺寸都是近似的。 All dimensions are approximate.

例1现构造一个用于本发明中的反射偏振器。 1 is now configured for use in the embodiment of the present invention is a reflective polarizer. 反射偏振器包含两个601薄层偏振器,它们和光学胶合剂一起压制成片。 The reflective polarizer 601 comprises two sheet polarizers, and compressed into tablets together with their optical cement. 通过对膜共挤压和两天后在一个拉伸机(tenter)上确定膜的方向产生601薄层偏振器。 Generated by polarizing sheet 601 after two days and the film co-extruded film is determined on a stretcher (tEnter) direction. 固有粘度为0.5dl/g(60wt.%苯酚(phenol)/40wt.%二氯苯(dichlorobenzene))的聚乙烯(polyethylene)苯二甲酸盐(naphthalate)由一个挤压机(extruder)以34kg每小时的速率传送压力,固有粘度为0.55dl/g(60wt.%苯/40wt.%二氯苯)的CoPEN(70摩尔%,2,6NDC(萘烷(naphthalene)二羧(dicarboxylic)酸),和30摩尔%DMT(对邻苯二甲酸二甲酯(dimethylterephthalate))由另一个挤压机以30kg每小时的速率传送压力。 An inherent viscosity of 0.5dl / g (60wt.% Phenol (phenol) /40wt.% dichlorobenzene (dichlorobenzene)) Polyethylene (Polyethylene) phthalate (naphthalate) by one extruder (Extruder) to 34kg per hour rate of the delivery pressure, an inherent viscosity of 0.55dl / g (60wt.% benzene /40wt.% dichlorobenzene) of CoPEN (70 mol%, 2,6NDC (decalin (naphthalene) dicarboxylic acid (dicarboxylic) acids) , and 30 mole% DMT (dimethyl phthalate (dimethylterephthalate)) is pressed by the other pressure unit transmission rate of 30kg per hour.

PEN在表面层上,它们被共挤压成为厚的外表层(通过相同的送料),并通过倍增器作为内部的和外部的薄层进行折叠。 PEN layer on the surface, which are co-extruded into the outer skin (by sending the same material) thickness, by folding and multiplier as the inner and outer sheet. 内部和外部的表面层包含偏振器总厚度的8%。 Inner and outer surface layer containing 8% of the total thickness of the polarizer. 馈料方法用于产生151层薄层,它们穿过两个偏振器,产生601薄层的一个压出物。 A method for producing the feed material layer 151 thin, they pass through two polarizers to produce a thin layer of extrudate 601. 美国第3,565,985号专利描述了类似的共挤压层。 U.S. Patent No. 3,565,985 describes similar coextrusion layer. 所有的拉伸都在拉伸机中进行。 All were stretched in the stretching machine. 对薄膜在大约140℃进行预热大约20秒并沿横向方向进行拉伸以大约6%每秒时速率达到一个大约4.4的拉伸比。 The film is preheated at about 140 deg.] C for approximately 20 seconds and drawn at a rate of about 6% per second, when reached a stretch ratio of approximately 4.4 in the transverse direction. 该薄膜然后在240℃在一个加热炉装置中进行松弛(大约是它的最大厚度的2%)。 The film is then subjected to a relaxation apparatus in a furnace at 240 deg.] C (about 2% of its maximum thickness). 完成的薄膜的厚度是46um。 The thickness of the film is completed 46um.

图12中显示了单个601薄膜的透射。 FIG. 12 shows a transmission of a single 601 film. 曲线a表示(a)-偏振光在法向的入射的透射,曲线b表示(a)-偏振光在60°入射角的透射,而曲线c表示(b)偏振光在法向入射角的透射。 Curve a represents (a) - polarized light incident on the transmission method of curve b represents (a) - polarized light transmittance at 60 ° angle of incidence, and curve c represents (b) transmitting the incident angle of the polarized light in France . 注意,(a)-偏振光在正常和60°的入射角的不均匀的透射。 Note that, (a) - a non-uniform polarization in transmission and a normal angle of incidence of 60 °. 还要注意由曲线c表示的在可见范围中(400-700nm)(b)偏振光的不均匀消光。 Note also that the non-uniform extinction in the visible range (400-700nm) (b) polarized light represented by curve c.

例2现构造另一个用于本发明的反射偏振器。 2 another embodiment is now configured for reflecting polarizer of the present invention. 本反射偏振器包含603薄层,并在一个连续的平膜上经一个共挤压的处理进行制作。 This reflective polarizer 603 comprises a thin, flat and in a continuous process by a co-extruded film was produced. 固有粘度为0.47dl/g(60%的苯酚加40%二氯苯)的聚乙烯苯二甲酸盐PEN以38kg每小时的速率传送压力,而且CoPEN以34kg每小时的速率由另一个共挤压机传送压力。 An inherent viscosity of 0.47dl / g (60% phenol plus 40% dichlorobenzene) polyethylene terephthalate at a rate of 38kg per hour of PEN delivery pressure, at a rate of 34kg per hour and CoPEN another by coextrusion press delivery pressure. CoPEN是70摩尔%,2,6,奈烷二羧酸甲基乙二醇酯,15摩尔%DMT,和15摩尔%1有乙烯乙二醇的二甲脂异苯酸盐的共聚物。 CoPEN was 70% by mole, 2,6, Chennai alkoxy acid methyl ethylene glycol, 15 mol% of the DMT, and 15 mole% copolymer of a ethylene glycol dimethyl ester of isophthalic acid. 馈料方法用于产生151薄层。 A method for producing a feed material sheet 151. 馈料被设计为产生薄层的一个倾斜的分布(对PEN和CoPEN,的光学薄层的厚度均为1.22)。 The feed material is designed to produce a thin layer of a sloping profile (thickness of optical thin layers of PEN and CoPEN, are 1.22). 该光学的叠堆被两个连续的倍增器进行增加。 The optical stack is subjected to two successive multiplier increased. 倍增器的标称倍增比分别为1.2和1.4。 The nominal multiplication ratio of the multipliers were 1.2 and 1.4. 在后倍增器和印模之间,表面层被加上了包含上述相同的CoPEN,由第三共挤压机在总速率为48每小时进行传送。 Between the multiplier and the stamp, the surface layer was added the same CoPEN described above comprising, transmitted by the third extruder at a total rate of 48 per hour total. 该薄膜随后在150℃预热30秒,并沿横向方向进行拉伸,以大约20%每秒的起始速度达到大约6的拉伸比。 The film is then preheated at 150 ℃ 30 seconds and drawn in the transverse direction, at an initial rate of about 20% per second to achieve a draw ratio of about 6. 被完成的薄膜厚度大约为89um。 Finished film thickness was about 89um.

图13表示该反射偏振器的光学性能。 13 shows optical properties of the reflective polarizer. 曲线a表示在法向入射,在非拉伸方向偏振的光的透射,曲线b表示平面入射角和平面偏振在50℃的入射角平行于非拉伸方向的光的透射,而曲线C表示在沿拉伸方向法向入射偏的偏振的光的透射。 Curve a represents the polarization in the non-stretched direction of incident light transmitted to the method, curve b represents the plane of incidence and plane of polarization parallel to the incident angle of light transmitting the non-stretching direction of 50 deg.] C, and the curve C shows the transmitting light along the normal to the stretching direction of polarization of a shot. 注意,沿非拉伸方向偏振的光的极高透射。 Note that, the high polarization direction of light in the non-stretched. 曲线a超过400-700nm的平均透射是87%。 Average transmittance curve over a 400-700nm is 87%. 还要注意曲线c表示的在可见范围(400-700nm)沿拉伸方向偏振的光的极高消光。 Note also that in the visible range of the curve represented by c (400-700 nm) in the polarization direction of stretching high extinction of light. 曲线c在400和700nm之间薄膜的平均透射为2.5%。 Curve c between 400 and 700nm is 2.5% average transmittance of the film. 曲线b的%RMS彩色为5%。 The% RMS color curve b is 5%. %RMS彩色是透射率在感性趣的波长范围中的方均根。 % RMS color is the transmittance in the wavelength range of the sense side of sexual interest in both the root.

例3再构造用于本发明的再另一个反射偏振器。 Example 3 Yet another reflecting polarizer then configured for the present invention. 本反射偏振器包含一个被共挤压的薄膜,它包含通过在一个操作中对铸网进行挤压然后在一个实验室薄层拉伸装置中确定薄层的方向而制成的481薄层。 This reflective polarizer comprises a thin film is co-extruded, cast grids through which comprises extrusion in a single operation a thin layer is then determined in a laboratory apparatus in the direction of stretching sheet 481 is made thin. 馈料方法和61薄层反馈以及三个(2x)倍增器一同使用。 Feed was used together with a thin layer 61 and a feedback method and three (2x) multipliers. 在最后倍增器和印模之间加上表面层。 Between the last multiplier and the stamp plus the surface layer. 固有粘度为0.47dl/g(60wt.%苯酚/40wt.%二氯苯)聚乙烯苯二甲酸PEN由一个共挤压机以11.4kg每小时的速率传送到该馈料。 An inherent viscosity of 0.47dl / g (60wt.% Phenol /40wt.% dichlorobenzene) polyethylene terephthalate PEN transmitted by a co-extruder at a rate of 11.4kg per hour into the feed material. 乙二醇改变的聚乙烯环己烷二甲在对苯二酸盐(从Eastman来的PCTG5445)由另一个共挤压机以11.4kg每小时的速率传送。 Polyethylene glycol, cyclohexanedimethanol change transmission rate in 11.4kg per hour terephthalate (PCTG 5445 from Eastman come) by another co-extrusion machine. 铸薄片为0.2mm厚和30cm宽。 Cast sheet is 0.2mm thick and 30cm wide. 用实验室拉伸装置单轴地确定簿片的方向,该装置使用缩放仪抓住薄膜的一部分以均匀的速度沿一个方向进行拉伸(当在其它的方向容许自由地松弛时)。 Direction stretching apparatus to uniaxially determined using a laboratory sheet book, the device uses a pantograph to seize part of the film is stretched at a uniform rate in one direction (when permit the free relaxed in the other direction). 薄片的样品大约5.40cm宽(在不受约束的方向)和7.45cm长。 The sample sheet width of about 5.40cm (the unconstrained direction) and a length of 7.45cm. 将薄片在大约100℃放进拉伸器并加热到135℃45秒。 The sheet into the stretcher at about 100 deg.] C and heated to 135 ℃ 45 seconds. 然后以20%每小时的速率开始拉伸(基于最初尺寸)直到样品被拉伸到大约1∶6(基于夹具到夹具的尺寸)。 At a rate of 20% per hour, it starts stretching (based on original dimensions) until the sample was stretched to about 1:6 (based on the size of the jig to the jig). 在拉伸后马上通过对它吹室温的空气进行冷却。 Immediately after stretching was cooled by blowing room temperature air on it. 在中心样品被发现松弛了2倍。 In the center of the sample was found relaxed by 2 times.

图14显示了该多层薄膜的透射,其中曲线a表示在沿非拉伸方向法向入射的偏振的光的透射,曲线b表示在60°的入射角上(p-偏振光)平面入射和平面偏振都平行于非拉伸方向的光的透射,而曲线c表示在沿拉伸方向法向入射的偏振的光的透射。 Figure 14 shows the transmittance of the multilayer film, wherein the curve a denotes the transmission in the non-stretch direction normal to the incident light polarization, the curve b represents (p- polarized light) is incident on the plane and the incident angle of 60 ° both transmit plane polarized parallel to the non-stretched direction of light, and curve c represents the light transmittance of the incident polarized in the direction of stretching method. 曲线a来自400-700nm的平均透射是89.7%,曲线b来自400-700nm的平均透射是96.9%,而曲线c来自400-700nm的平均透射是4.0%。 Curve a from 400-700nm average transmissivity was 89.7%, the average transmittance curve b from 400-700nm is 96.9%, the average transmittance and curve c from 400-700nm is 4.0%. 曲线a的%RMS彩色是1.05%,而曲线b的RMS彩色是1.44%。 The% RMS color curve a is 1.05%, while the curve b is 1.44% RMS color.

例4本发明的可转换的光板是这样制备的,将包含这里所述的多层光学叠堆的反射偏振器装到删除了其吸收偏振器的STN象素液晶显示器的两边。 Of the optical plate 4 of the present invention may be converted it is thus prepared, comprising a multilayer optical stacks described herein reflective polarizers mounted on both sides of the deletion of the STN liquid crystal display pixels absorption polarizer. 沿偏振器的边缘,通过黏附带将反射偏振器固定到LCD。 Along the edges of the polarizer, the reflective polarizer by adhesion tape is secured to the LCD. 每个反射偏振器的偏振方向置于和每个衬底上的液晶的排列方向平行,从而当反射偏振器正交时可得到最大可见消光。 The polarization direction of each reflective polarizer was placed on the liquid crystal and the alignment direction of each of the parallel substrate to be obtained when the maximum visible extinction orthogonal reflective polarizer.

光板被置于环境光中,并进行视觉的监视。 Light panel is placed in ambient light and monitored visually. 不加电压时光板呈部分的透明。 Time no voltage plates are transparent portion. 当施加电压时光板转向镜状表现。 When the applied voltage time turning mirror plate-like performance.

例5一个机械的可转换窗口构造如下:将4/1波长,在Polaroid Corp.的560nm波长的双折射薄膜叠加到10×10×0.16cm透明玻璃板的一侧。 Example 5 a mechanically switchable window structure is as follows: A 4/1 wavelength, at a wavelength of 560nm birefringent film Polaroid Corp. superimposed side 10 × 10 × 0.16cm transparent glass plate. 如例1中的第一反射偏振器叠加到板的相反侧。 As in Example 1 to the first reflective polarizer superposed opposite side of the plate. 和第一个构造相同的第二反射偏振器叠加到第二透明玻璃板。 The same configuration as the first and second reflective polarizer superimposing a second transparent glass plate. 玻璃板安装在平行的槽中,并可用手转换。 Parallel glass plate mounted in the groove, and the hand is changed.

通过在“关闭”和“打开”位置测量穿过窗口的光的透射对可转换窗口进行评价。 By "close" and "open" position measuring light transmission through the window of the window may be converted evaluated. 光源是一个12伏特金属卤钨灯。 The light source is a tungsten halogen lamp 12 volt metal. 被透射的光的强度由无定形硅元素光电二极管测量,它只对可见光敏感。 The intensity of the transmitted light by the amorphous silicon photodiode measuring element, it is only sensitive to visible light. 在“关闭”位置,第一块板置于和第二块板平行,且双折射薄膜朝外,或者离第二块板最远。 In the "off" position, a first plate and a second plate disposed in parallel, and the birefringent film outward, or farthest from the second plate. 为了转换到“打开”位置,第一板翻转180°从而双折射薄膜是向内的,或者在第二块板近旁和两个偏振器之间。 To convert to the "open" position, the first plate inverted 180 ° so that the birefringent film was inward, or between the second polarizing plate and two in the vicinity. 还通过1)两个没有偏振器或者双折射薄膜的玻璃板2)两个反射偏振器(偏振方向平行,每个都叠加到一个玻璃板)进行两种控制透射测量。 Through 1) two glass plates without polarizers or birefringent film 2) two reflective polarizers (polarization direction parallel to a glass sheet superposed each) for two control transmission measurements. 第二控制要模拟在偏振器之间的较佳双折射薄膜的出现。 To simulate the second control in the event the preferred birefringent film between the polarizers. 结果示于下面的表中: The results are shown in the following table:

</tables>两个玻璃板的透射参考为100%。 </ Tables> two glass sheets with reference to 100% transmittance. 1),2),和4)的%相对透射和那个值比较。 1), 2), and 4) the relative transmission and% compare that value. 窗口在5和35%透射之间是可机械转换的。 A window between 5 and 35% transmission is mechanically translatable. 对一个理论上的理想的双折射薄膜,如位置4所述,透射为42%。 For a theoretically perfect birefringent film, as the position 4, the transmission was 42%.

Claims (17)

  1. 1.一种可转换光学装置(8),其特征在于包含:可转换光板(10),所述光板包含:有第一和第二主表面的透明旋光薄层(12);安装在所述旋光薄层的第一主表面上的第一反射偏振器(32);及安装在所述旋光薄层的第二主表面上的第二反射偏振器(34);及用于在反射状态和透射状态之间进行转换的装置(19,21,23)。 A switchable optical device (8), characterized by comprising: a switchable optical panel (10), said optical plate comprising: optically transparent sheet having first and second major surface (12); mounting said a first reflective polarizer (32) on a first major surface of the optically thin layers; and a second reflective polarizer is mounted on the second major surface of the optically thin layers (34); and means for reflecting state and transmission means between the state transition (19, 21).
  2. 2.可转换窗(62),其特征在于包含:可转换光板(68),所述光板包含:液晶装置(70),所述液晶装置包含在并行配准并形成空腔的第一和第二透明平面衬底(72,74),每一个所述衬底有外部表面和面向空腔的内部表面,以及限定在所述空腔中的液晶材料(76);安装在液晶的第一衬底的外部表面上的第一反射偏振器(82);及安装在液晶的第二衬底的外部表面上的第二反射偏振器(84);及用于在打开状态和关闭状态之间电子转换所述光板的装置(90,92,94)。 2. The switchable window (62), characterized by comprising: a switchable optical panel (68), the light panel comprising: a liquid crystal device (70), said liquid crystal means comprising a first and second parallel in registration and form a cavity two transparent planar substrate (72, 74), each said substrate having an exterior surface and an interior surface facing the cavity, and defines a liquid crystal material (76) in said cavity; mounted on a first substrate of the liquid crystal a first reflective polarizer (82) on the exterior surface of the bottom; and mounted on the exterior surface of the second substrate of the liquid crystal of the second reflective polarizer (84); and means between an open state and a closed state of the electronic the optical plate means (90, 92) conversion.
  3. 3.如权利要求2所述的窗口,其特征在于还包含一对并行配准并在它们之间形成一空间的窗玻璃(64,66),其中所述可转换光板被放置在窗玻璃之间并和与它们平行。 3. A window according to claim 2, characterized by further comprising a pair of parallel registration glazing and forming a space (64, 66) therebetween, wherein the switchable light panel glazing is placed in the between and parallel with them.
  4. 4.如权利要求2所述的窗口,还包含在并行配准并在它们之间形成一空间的第一和第二透明窗玻璃,每一个所述窗玻璃有一和空间面对的外部表面,其特征在于可转换光板放置在一个窗玻璃的外部表面上。 4. A window according to claim 2, further comprising a registration and parallel first and second transparent glazing forming a space therebetween, each of said glazing and an external surface facing the space, wherein the switchable optical plate is placed on the exterior surface of a window glass.
  5. 5.如权利要求2所述的窗口,其特征在于所述电子转换装置包含在液晶装置的衬底的内部表面上的连续的透明导电层(78,80)以及用于对液晶装置提供电压的,连接到导电层的驱动电子的装置(90,92,94)。 5. A window according to claim 2, wherein said electronic switching means comprises a continuous transparent conductive layer on the inner surface of the substrate of the liquid crystal device (78, 80) and means for supplying a voltage to the liquid crystal device driving the electronic means (90, 92) connected to the conductive layer.
  6. 6.如权利要求1所述的装置,所述旋光薄层包含液晶装置,所述液晶装置包含:一对在并行配准并,形成空腔的透明衬底(14,16),每一个衬底有面向空腔的内部表面和外部表面;在每一个衬底的内部表面上的导电层(20,22);及所述空腔中形成的液晶材料(18);其特征在于所述可转换装置包含用于对液晶装置提供电压的连接到导电材料的驱动电子的系统(19,21,23)。 6. The apparatus according to claim 1, said sheet comprising an optically active liquid crystal device, a liquid crystal device comprising: a pair of parallel and registration, the transparent substrate is formed a cavity (14, 16), each of a liner a cavity facing the bottom of the inner and outer surfaces; a conductive layer (20, 22) on the interior surface of each substrate; a liquid crystal material and the formed cavity (18); characterized in that said converting means comprising drive electronics for the system (19, 21) connected to the conductive material to provide voltage to the liquid crystal device.
  7. 7.如权利要求6所述的装置,其特征在于还包含在液晶装置和一个反射偏振器之间的光学延迟器。 7. The apparatus according to claim 6, characterized by further comprising an optical retarder between the liquid crystal device and a reflective polarizer.
  8. 8.如权利要求1或2所述的装置,其特征在于第一和第二反射偏振器都包含一相邻材料薄层对(44)的多层叠层,每一个所述薄层对在偏振器平面中的第一方向上的相邻薄层(41,43)之间呈现折射率差异,并在偏振器平面中和第一方向正交的第二方向上相邻薄层之间的不呈现折射率的差异。 8. The apparatus of claim 1 or claim 2, characterized in that the first and second reflective polarizers include a thin layer of material adjacent to the multilayer stack (44), each of said pair of polarizing thin layer not between adjacent thin sheet adjacent to the second direction presented in the first direction in the plane between the (41, 43) difference in refractive index, and in the direction perpendicular to the first plane of polarization presenting difference in refractive index.
  9. 9.如权利要求1或2所述,第一和第二反射偏振器都包含第一种和第二种材料交叠的薄层(41,43)的多层薄片,每一层都有小于0.5μm的平均厚度,其特征在于所述第一种材料展现了应力感应的双折射,并且所述薄片是单轴拉伸的。 As claimed in claim 1 or 2, the first and second reflective polarizers include first and second overlapping sheet material (41, 43) of the multilayer sheet, each layer has less than the average thickness of 0.5μm, wherein said first material exhibits stress-induced birefringence and the sheet is uniaxially stretched.
  10. 10.如权利要求9所述,多层薄片包含用于反射有在从400到800nm的范围中的波长的光线薄层对的叠层,其特征在于所述每一个叠层对都有邻接一层第二种聚合体材料的第一种聚合体材料的薄层,其中叠层包含薄层对其所分布的厚度使能反射从400到800nm波长的光线。 As claimed in claim 9, with a multi-layer stack for reflecting sheet comprises a thin layer of light in a wavelength range from 400 to 800nm ​​in pairs, wherein each of said abutment has a pair of laminate a first thin layer of polymeric material, the second polymeric material, wherein the stack comprises a thin layer of its thickness enabling reflection profile from 400 to 800nm ​​wavelength light.
  11. 11.如权利要求6所述的装置,其特征在于所述导电材料包含在衬底的内部表面上的连续的透明导电层。 11. The apparatus according to claim 6, wherein said electrically conductive material comprises a continuous transparent conductive layer on the inner surface of the substrate.
  12. 12.如权利要求1所述的装置,其特征在于所述旋光薄层包含单轴导向的双折射的热塑性物质。 12. The apparatus according to claim 1, wherein the optically birefringent thermoplastic material comprising a uniaxially oriented sheet.
  13. 13.一种装置,包含:可转换光板(10),包含:扭曲向列液晶装置(12),包含并行配准并在它们之间形成空腔的第一和第二透明衬底(14,16),每一个所述衬底有一外部表面和一面向空腔的内部表面,及形成在空腔中的液晶材料(18);安装在衬底的内部表面上的连续的透明导电层(20,22);安装在第一衬底的外部表面上的第一反射偏振器(32);及安装在第二衬底的外部表面上的第二反射偏振器(34);及连接到导电层的驱动电子的系统;其特征在于第一和第二反射偏振器都包含至少100层薄层对(44)的叠层,其中每一个薄层对都包含邻接第二薄层的第一正向双折射薄层,其中每一个薄层对的厚度在100到500nm的范围中,叠层以4∶1到7∶1范围内的比值被单轴地拉伸,每一个正向双折射薄层在拉伸方向的折射率大于横向折射率,其值在0.1和0.3之间,从而光板可在反射状态和 13. An apparatus, comprising: a switchable optical panel (10), comprising: a twisted nematic liquid crystal device (12), comprising a cavity formed in parallel registration and first and second transparent substrates (14 between them, 16), each said substrate having an exterior surface and a liquid crystal material (18) facing the interior surface of a cavity, and formed in the cavity; continuous transparent conductive layer mounted on the inner surface of the substrate (20 , 22); a first reflective polarizer (32) mounted on the external surface of the first substrate; and mounted on the outer surface of the second substrate, a second reflective polarizer (34); and connected to the conductive layer electronic drive system; wherein the first and second reflective polarizer contains at least 100 layers of thin-film multilayer (44), wherein each sheet comprises a first forward pair adjacent to the second lamina birefringent thin layer, wherein a thickness of each thin layer is in the range of 100 to 500nm, the laminate is uniaxially stretched in a ratio in the range of 4:1 to 7:1, each birefringent thin layer in a forward the refractive index of stretching direction is larger than the transverse refractive index, which is a value between 0.1 and 0.3, so that the light reflective state and a plate 射状态之间电子地转换。 Electronically between output state transitions.
  14. 14.如权利要求13所述的装置,其特征在于所述第一薄层包含PEN,而第二层包含coPEN,sPS,和Eastar中的一种。 14. The apparatus according to claim 13, wherein said first thin layer comprising PEN, and the second layer comprises a coPEN, sPS, and one of Eastar.
  15. 15.一种可转换光学装置,包含:可转换的光板,包含:液晶装置,包含:以并行配准并在它们之间形成空腔的一对反射偏振器,反射偏振器都有面向空腔的内部表面和外部表面;形成在空腔中的液晶材料;及在反射偏振器的内部表面上的透明导电层;及连接到导电层的驱动电子的系统,从而所述光板在反射状态和透射状态之间电子地转换。 A switchable optical device, comprising: a switchable optical panel comprising: a liquid crystal device, comprising: a registration and a parallel pair of forming a cavity between them a reflective polarizer, the reflective polarizer has its cavity facing the liquid crystal material in the cavity;; the inner and outer surfaces and the transparent conductive layer on the inner surface of the reflective polarizer; and the conductive layer is connected to the drive electronics system, so that the light transmissive state and a reflective plate electronic switched between states.
  16. 16.一种可转换窗口(114),包含:有第一和第二主表面的第一透明窗玻璃(118);安装在第一透明窗玻璃上的第一反射偏振器(120);至少一个光闸(116),所述光闸包含第二透明窗玻璃(122),安装在第二透明窗玻璃上的第二反射偏振器(126),安装在所述第二透明窗玻璃上的,和第二反射偏振器相对的双折射薄层(124);及用于将光闸旋转到双折射薄层或邻近和平行于第一反射偏振器的第二反射偏振器的装置,从而窗口在打开和关闭状态之间可机械地转换。 16. A switching window (114), comprising: a first transparent window pane (118) a first and a second major surface; a first transparent window pane is mounted on the first reflective polarizer (120); at least a shutter (116), said shutter comprising a second transparent glazing (122), a second reflective polarizer is mounted on the second transparent glazing (126), mounted on said second transparent glazing and a second reflective polarizer opposite the birefringent thin layer (124); and means for rotating the shutter to a thin layer or birefringent means adjacent and parallel to the second reflective polarizer of the first reflective polarizer, so that the window mechanically switched between open and closed states.
  17. 17.一种透射反射的光学显示器(128),包含:液晶显示装置(130),所述装置包含前吸收偏振器(138),后吸收偏振器(140)和位于它们之间的象素液晶显示装置(142);用于明亮液晶显示装置的背景光(132);在液晶显示装置和背景光之间的光学漫射器(134);及在光学漫射器和背景光之间的可转换的透射反射器(136),所述可转换透射反射器包含:无像素液晶装置(146),包括:前衬底(150),所述前衬底面向光学漫射器,及以并行配准北在它们之间形成空腔的后衬底(152),每个衬底都有一面向空腔的内部表面和外部表面;在每一个衬底的内部表面上的导电材料(156,158);及形成在空腔中的液晶材料(154);所述无象素液晶装置具有和前衬底相关的前校直方向及和后衬底相关的后校直方向;反射偏振器(148),安装在无象素液晶显示装置的后衬底上,邻近背景光;及用于在反射状 An optical display (128) 17. A transflector comprising: a liquid crystal display device (130), said means comprising an absorbing polarizer (138) front and rear absorbing polarizer (140) and the pixels of the liquid crystal located between them display means (142); a background light (132) of the liquid crystal display device is bright; display optical diffuser (134) between the backlight and the liquid crystal device; and may be between the optical diffuser and background light conversion transflector (136), the switchable transflector comprising: a no-pixel liquid crystal device (146), comprising: a front substrate (150), the optical diffuser facing the front substrate, and in parallel with North quasi cavity is formed therebetween after the substrate (152), each substrate has a surface facing the interior cavity and an exterior surface; conductive material on the inner surface of each substrate (156, 158) ; and a liquid crystal material in the cavity (154); said apparatus having a liquid crystal pixel without front and rear direction of the straightening alignment directions and the front substrate and the rear substrate associated; a reflective polarizer (148) , mounted adjacent the rear substrate on the backlight device without a pixel liquid crystal display; and shaped for reflecting 态和透视状态之间电子转换的装置(156,158),其中后吸收偏振器的偏振方向平行于无象素液晶装置的前校直方向。 It means an electronic state and a perspective conversion between states (156, 158), wherein the polarization direction of the absorbing polarizer is parallel to the alignment direction of liquid crystal pixels without prior apparatus.
CN 96195043 1996-06-03 1996-06-03 Optical panel capable of switching between reflective and transmissive state CN1189224A (en)

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