公开(公告)号：US6130731A

公开(公告)日：2000-10-10

申请号：US857860

申请日：1997-05-16

申请人： Gunnar Andersson ,  Ingolf Dahl ,  Lachezar Komitov ,  Sven Torbjorn Lagerwall ,  Kent Skarp ,  Bengt Stebler

发明人： Gunnar Andersson ,  Ingolf Dahl ,  Lachezar Komitov ,  Sven Torbjorn Lagerwall ,  Kent Skarp ,  Bengt Stebler

IPC分类号： G02F1/1333 ,  G02F1/1335 ,  G02F1/13363 ,  G02F1/1347 ,  G02F1/135 ,  G02F1/139 ,  G02F1/141 ,  G02F1/31

CPC分类号： G02F1/13471 ,  G02F1/141 ,  G02F1/1418 ,  G02F1/133365 ,  G02F1/133553 ,  G02F1/13473 ,  G02F1/135 ,  G02F1/31 ,  G02F2001/133531 ,  G02F2001/133638 ,  G02F2203/02

摘要： A device for influencing light has a polarizer, a ferroelectric or electroclinic response type liquid crystal halfwave plate whose liquid crystals are in the smectic phase with bookshelf geometry and have molecular axes which are rotatable around a first direction corresponding to the direction of incoming light in response to an electric field applied across the electrodes on either side of the halfwave plate, a quarter wave retarder plate, and a mirror. The polarizer, plates and mirror are arranged such that incoming light is passed from the polarizer through the liquid crystal plate and the retarder plate, and is reflected by the mirror in a second direction opposite to the first direction back through the retarder and the liquid crystal plate so as to provide a reflected polarized light plane to the polarizer. The polarizer has a first polarization direction set parallel to one electrically selectable molecular axis direction of the liquid crystal molecules, which is selected in response to a first electric field level. The retarder plate has its slow axis inclined either 45.degree. or 135.degree. relative to the optic axis of the liquid crystal. The liquid crystal, furthermore, is of a material which produces an angular difference 2.theta. in optic axis direction in response to a second electric field level whose polarity is opposite that of the first electric field level. This allows the device to rotate the reflected polarized light plane by an angle of 8.theta. in response to the second electric field level.

摘要翻译： 用于影响光的装置具有偏振器，铁电或电位响应型液晶半波片，其液晶处于具有书架几何形状的近晶相中，并且具有能够响应于与入射光方向对应的第一方向旋转的分子轴 涉及施加在半波片两侧的电极上的电场，四分之一波长延迟板和反射镜。 偏振器，平板镜和反射镜被布置成使得入射光从偏振器通过液晶板和延迟板，并且通过反射镜沿与第一方向相反的第二方向反射通过延迟器和液晶 以便向偏振器提供反射的偏振光平面。 偏振器具有平行于液晶分子的一个电选择分子轴方向设置的第一偏振方向，其响应于第一电场电平被选择。 缓速板的慢轴相对于液晶的光轴倾斜45°或135°。 此外，液晶是响应于极性与第一电场电平相反的第二电场电平而在光轴方向上产生角度差2θ的材料。 这允许装置响应于第二电场电平使反射的偏振光平面旋转角度为θθ。

公开(公告)号：US5847790A

公开(公告)日：1998-12-08

申请号：US479404

申请日：1995-06-07

申请人： Gunnar Andersson ,  Ingolf Dahl ,  Lachezar Komitov ,  Sven Torbjorn Lagerwall ,  Kent Skarp ,  Bengt Stebler

发明人： Gunnar Andersson ,  Ingolf Dahl ,  Lachezar Komitov ,  Sven Torbjorn Lagerwall ,  Kent Skarp ,  Bengt Stebler

IPC分类号： G02F1/1333 ,  G02F1/1335 ,  G02F1/13363 ,  G02F1/1347 ,  G02F1/135 ,  G02F1/139 ,  G02F1/141 ,  G02F1/31

CPC分类号： G02F1/13471 ,  G02F1/141 ,  G02F1/1418 ,  G02F1/133365 ,  G02F1/133553 ,  G02F1/13473 ,  G02F1/135 ,  G02F1/31 ,  G02F2001/133531 ,  G02F2001/133638 ,  G02F2203/02

摘要： A device for influencing light has a polarizer, a ferroelectric or electroclinic response type liquid crystal halfwave plate whose liquid crystals are in the smectic phase with bookshelf geometry and have molecular axes which are rotatable around a first direction corresponding to the direction of incoming light in response to an electric field applied across the electrodes on either side of the halfwave plate, a quarter wave retarder plate, and a mirror. The polarizer, plates and mirror are arranged such that incoming light is passed from the polarizer through the liquid crystal plate and the retarder plate, and is reflected by the mirror in a second direction opposite to the first direction back through the retarder and the liquid crystal plate so as to provide a reflected polarized light plane to the polarizer. The polarizer has a first polarization direction set parallel to one electrically selectable molecular axis direction of the liquid crystal molecules, which is selected in response to a first electric field level. The retarder plate has its slow axis inclined either 45.degree. or 135.degree. relative to the optic axis of the liquid crystal. The liquid crystal, furthermore, is of a material which produces an angular difference 2.theta. in optic axis direction in response to a second electric field level whose polarity is opposite that of the first electric field level. This allows the device to rotate the reflected polarized light plane by an angle of 8.theta. in response to the second electric field level.

公开(公告)号：US5247379A

公开(公告)日：1993-09-21

申请号：US885285

申请日：1992-05-18

申请人： Gunnar Andersson ,  Lachezar Komitov ,  Sven T. Lagerwall ,  Bengt Stebler ,  Kurt Flatischler

发明人： Gunnar Andersson ,  Lachezar Komitov ,  Sven T. Lagerwall ,  Bengt Stebler ,  Kurt Flatischler

IPC分类号： G02F1/139

CPC分类号： G02F1/1418 ,  G02F1/1393

摘要： An electro-optical device including a chiral nematic liquid crystal disposed between flat plates treated to weakly enforce molecular orientation along one preferred direction parallel to the plates. The plates are spaced by a distance small compared to the pitch of the helix typical in a bulk of the material, or the helix compensated by additives to ensure the equivalent situation. By an externally applied electric field the liquid crystal molecular orientation is rotated in a plane parallel to the plates away from the preferred orientation an angle the sign and size of which depends on the sign and magnitude of the field. The optical axis of the liquid crystal, oriented along the molecular orientation, is thus controlled by the external electric field in such a way as to make a linear light valve or other electro-optical device.

摘要翻译： PCT No.PCT / SE90 / 00101 Sec。 371 1990年12月12日第 102（e）1990年12月12日日期PCT提交1990年2月15日PCT公布。 公开号WO90 / 09613 日本1990年8月23日。一种电光装置，其包括设置在平板之间的平板之间的手性向列型液晶，其弱化地沿着平行于板的一个优选方向强制分子取向。 与典型的大部分材料中的螺旋螺距相比，板的距离较小，或由添加剂补偿的螺旋以确保等效的情况。 通过外部施加的电场，液晶分子取向在平行于板的平面中从优选取向旋转，其符号和尺寸取决于场的符号和幅度。 因此，沿着分子取向取向的液晶的光轴被外部电场控制，以便制成线性光阀或其它电光装置。

公开(公告)号：US4838663A

公开(公告)日：1989-06-13

申请号：US105254

申请日：1987-10-07

申请人： Sven T. Lagerwall ,  Gunnar Andersson ,  Ingolf Dahl ,  Wojciech Kuczynski ,  Kent Sharp ,  Bengt Stebler

发明人： Sven T. Lagerwall ,  Gunnar Andersson ,  Ingolf Dahl ,  Wojciech Kuczynski ,  Kent Sharp ,  Bengt Stebler

IPC分类号： G02F1/137 ,  G02F1/139 ,  G02F1/141

CPC分类号： G02F1/1418

摘要： A new liquid crystal electro-optic device similar to the SSFLC device is described. It uses the same kind of polar chiral smectics and the same geometry as the SSFLC device (thin sample in the "book-shelf" layer arrangement) but instead of using a tilted smectic phase like the C* phase, it utilizes the above-lying, essentially non-ferroelectric A phase. The achievable optical intensity modulation is considerably lower than for the SSFLC device, but the device is about one hundred times faster. It is thus appropriate for modulator rather than for display applications. Sample fabrication is simpler and, finally, the device is insensitive to polarization compensation from external charges. The electro-optic switching at moderate applied voltages can be detected through the full range of the A phase.

公开(公告)号：US06549255B2

公开(公告)日：2003-04-15

申请号：US09754189

申请日：2001-01-05

申请人： Bengt Stebler ,  Dietrich Demus ,  Torbjörn Lagerwall ,  Lachezar Komitov

发明人： Bengt Stebler ,  Dietrich Demus ,  Torbjörn Lagerwall ,  Lachezar Komitov

IPC分类号： G02F13337

CPC分类号： G02F1/133711 ,  G02F1/13471 ,  G02F1/141 ,  G02F2001/133726 ,  G02F2001/133769

摘要： An electrooptic device (2), and the methods for manufacturing, including a liquid crystal material (12) disposed between electroded flat glass or polymer substrates (4, 20) which have been precoated with a e.g. a chiral smectic surface layer (10, 14) in such way that the surface layer is able to mediate switching of the liquid crystal (12) between different optical states. The chiral smectic surface layer can be a polymer, oligomer or monomer liquid crystal with paraelectric, ferroelectric, ferrielectric or antiferroelectric response, which is insoluble in the liquid crystal used for the bulk (12) between the electroded substrates (4, 20). the switchable surface director enforces a certain orientation of the optic axis in the bulk liquid crystal (12), which can be a conventional non-chiral or chiral nematic or smectic in a twisted or non-twisted configuration.

摘要翻译： 电光装置（2）以及制造方法，包括设置在例如电镀的平板玻璃或聚合物基板（4,20）之间的液晶材料（12）。 手性近晶表面层（10,14），使得表面层能够介导不同光学状态之间的液晶（12）的切换。 手性近晶表面层可以是具有顺电，铁电，电介质或反铁电反应的聚合物，低聚物或单体液晶，其不溶于用于电沉积基板（4,20）之间的本体（12）的液晶。 可切换表面导向器在本体液晶（12）中实现光轴的某个取向，其可以是扭曲或非扭曲构型的常规非手性或手性向列或近晶。