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    • 6. 发明授权
    • Switchable color filter
    • 可切换滤色片
    • US07126654B2
    • 2006-10-24
    • US10415713
    • 2001-11-01
    • Jürg FünfschillingKlaus SchmittMartin Schadt
    • Jürg FünfschillingKlaus SchmittMartin Schadt
    • G02F1/1347
    • H04N9/3117G02B5/3016G02F1/133533G02F1/133536G02F1/13473G02F1/23G02F2001/133543G02F2001/133638G02F2201/343G02F2203/34
    • A liquid crystal switchable color filter switches between three color bands and is preferably used for time-sequential devices, such as projection devices, direct view displays and video cameras. The color filter may employ circularly polarizing selective reflection bands of at least four cholesteric filters together with three liquid crystal switches and related retarder layers. In one embodiment, the handedness of the second cholesteric is equal to the handedness of the third cholesteric filter and opposite to the handedness of the first and fourth cholesteric filter and, for the blocking state of a color band, the optic axis of the corresponding liquid crystal switch is parallel or perpendicular to the polarization direction. This concept leads to improved, excellent color saturation and requires less stringent production tolerances than in the prior art. Moreover, it advantageously allows overlapping color transmission bands thus improving the light efficiency.
    • 液晶可切换彩色滤光片在三个色带之间切换,优选用于诸如投影设备,直视图和摄像机的时序设备。 滤色器可以采用至少四个胆甾型滤光器的圆偏振选择反射带,以及三个液晶开关和相关的延迟器层。 在一个实施例中,第二胆甾醇的螺旋性等于第三胆甾型滤光器的螺旋性,并且与第一和第四胆甾型滤光器的螺旋性相反,并且对于色带的阻挡状态,相应液体的光轴 晶体开关平行或垂直于偏振方向。 该概念导致改进的优异的色饱和度,并且比现有技术要求的生产公差要小得多。 此外,其有利地允许重叠的彩色传输频带,从而提高光效率。
    • 7. 发明授权
    • Reflective ferroelectric liquid crystal display and projection system
    • 反光铁电液晶显示和投影系统
    • US06606134B1
    • 2003-08-12
    • US09036214
    • 1998-03-06
    • Jürg FünfschillingMartin Schadt
    • Jürg FünfschillingMartin Schadt
    • G02F1133
    • G02F1/141
    • A major disadvantage of known reflective displays consists in the fact that they ideally have a switching angle of ±45° in the so-called symmetric mode. With the liquid crystal mixtures known to date, this is not possible without hysteresis effects occurring even at small switching angles and resulting in the switching time being increased to an impermissible extent. The invention relates to a novel reflective, ferroelectric display which can be actuated without DC voltage and has a maximum switching angle &agr; which is ±22.5°. The liquid crystal display according to the invention is distinguished in particular by the fact that a further birefringent element is arranged between the two plates bounding the birefringent liquid crystal layer. In a first category of liquid crystal displays according to the invention, this additional birefringent element is a transparent plate having an optical path difference &Dgr;n·d≈&lgr;/4, which is arranged after the liquid crystal layer in the direction of the light incidence, in particular between said layer and the mirror.
    • 已知反射显示器的主要缺点在于它们理想地在所谓的对称模式中具有±45°的切换角度。 对于迄今为止已知的液晶混合物,即使在小的开关角度下也不会发生滞后效应,并且导致切换时间增加到不允许的程度,这是不可能的。 本发明涉及一种新型的反射式铁电显示器,其可以在没有直流电压的情况下被起动并且具有±22.5°的最大开关角度α。 根据本发明的液晶显示器的特征在于,在两个界定双折射液晶层的平板之间布置另外的双折射元件。 在根据本发明的第一类液晶显示器中,该附加双折射元件是具有在光入射方向上的液晶层之后的光程差DELTAn.d≈lambd/ 4的透明板, 特别是在所述层和反射镜之间。
    • 8. 发明授权
    • Optical element
    • 光学元件
    • US08553196B2
    • 2013-10-08
    • US12692435
    • 2010-01-22
    • Martin SchadtHubert Seiberle
    • Martin SchadtHubert Seiberle
    • C09K19/52G02F1/13
    • B42D25/364B42D25/29B42D25/391B42D2033/26B42D2035/24G02B5/30G02B5/3016G02B5/3025G02B5/3083G02B5/32G02B27/28G02B27/281G02F1/13363G06K19/06046
    • A component has a substrate (1) made of a transparent material, for example glass. On this layer (1), there is a linear polarizer (2) on which there is a layer (3) of a photo-oriented polymer network (PPN)(-LPP) which is oriented in locally varying fashion via its surface which covers the substrate. The layer (3) is adjoined by an anisotropic layer (4) of cross-linked liquid-crystal monomers. This layer (4) then has a molecular arrangement whose orientation is defined by the underlying orientation layer (3). The layer (4) will have been photocross-linked by exposure to a suitable wavelength of light, with the result that the molecular orientation defined by the PPN layer (3) is fixed. The clement, denoted as a whole by 7, can then be used as an optical component which is protected against forgery, it being possible for the orientation pattern of the liquid-crystal layer or the optical information stored therein to be made visible by means of an external polarizer (5), for example.
    • 部件具有由透明材料例如玻璃制成的基板(1)。 在该层(1)上,存在线性偏振器(2),其上存在光取向聚合物网络(PPN)(LPP)的层(3),其通过其表面以局部变化的方式取向 底物。 层(3)由交联液晶单体的各向异性层(4)邻接。 然后,该层(4)具有其取向由下面的取向层(3)限定的分子排列。 层(4)将通过暴露于合适的波长的光而被交叉连接,结果是由PPN层(3)限定的分子取向是固定的。 然后,由7表示的整体可以用作防止伪造的光学部件,可以通过以下方式使液晶层的取向图案或存储在其中的光学信息变得可见: 外部偏振器(5)。
    • 9. 发明授权
    • Optical element
    • 光学元件
    • US07679701B2
    • 2010-03-16
    • US11931937
    • 2007-10-31
    • Martin SchadtHubert Seiberle
    • Martin SchadtHubert Seiberle
    • G02F1/1335
    • B42D25/364B42D25/29B42D25/391B42D2033/26B42D2035/24G02B5/30G02B5/3016G02B5/3025G02B5/3083G02B5/32G02B27/28G02B27/281G02F1/13363G06K19/06046
    • A component has a substrate (1) made of a transparent material, for example glass. On this layer (1), there is a linear polarizer (2) on which there is a layer (3) of a photo-oriented polymer network (PPN)(-LPP) which is oriented in locally varying fashion via its surface which covers the substrate. The layer (3) is adjoined by an anisotropic layer (4) of cross-linked liquid-crystal monomers. This layer (4) then has a molecular arrangement whose orientation is defined by the underlying orientation layer (3). The layer (4) will have been photocross-linked by exposure to a suitable wavelength of light, with the result that the molecular orientation defined by the PPN layer (3) is fixed. The element, denoted as a whole by 7, can then be used as an optical component which is protected against forgery, it being possible for the orientation pattern of the liquid-crystal layer or the optical information stored therein to be made visible by means of an external polarizer (5), for example.
    • 部件具有由透明材料例如玻璃制成的基板(1)。 在该层(1)上,存在线性偏振器(2),其上存在光取向聚合物网络(PPN)(LPP)的层(3),其被局部变化的方式通过其表面覆盖 底物。 层(3)由交联液晶单体的各向异性层(4)邻接。 然后,该层(4)具有其取向由下面的取向层(3)限定的分子排列。 层(4)将通过暴露于合适的波长的光而被交叉连接,结果是由PPN层(3)限定的分子取向是固定的。 然后,将整体表示为7的元件可以用作防止伪造的光学部件,可以使液晶层的取向图案或其中存储的光学信息通过 外部偏振器(5)。