公开(公告)号：US08237910B2

公开(公告)日：2012-08-07

申请号：US12112219

申请日：2008-04-30

申请人： Enkh-Amgalan Dorjgotov ,  Philip J. Bos ,  Achintya K. Bhowmik

发明人： Enkh-Amgalan Dorjgotov ,  Philip J. Bos ,  Achintya K. Bhowmik

IPC分类号： G02F1/13

CPC分类号： G02F1/216 ,  G02F1/1397

摘要： A liquid crystal etalon includes a chiral nematic material contained in a liquid crystal cell having alignment surfaces configured to bias the chiral nematic material toward a twisted liquid crystal configuration with a twist less than 360°. Electrodes are arranged to apply an operative electrical bias to the liquid crystal cell. Mirrors disposed about the chiral nematic material define a resonant optical cavity. At a first electrical bias the etalon is transmissive for light of a first wavelength via a selected liquid crystal twist angle and cavity thickness at which different non-equal eigenmodes reach resonance conditions simultaneously. In a projector embodiment, a projection system with a field sequential image projection light source is coupled with the liquid crystal etalon, the etalon electrodes are patterned into pixels defining a display area, and the projector is operated in a field sequential illumination mode.

摘要翻译： 液晶标准具包括液晶单元中的手征向列型材料，该液晶单元具有对准表面，该取向表面配置为以小于360度的扭曲将手性向列相向扭曲的液晶结构偏移。 电极被布置成将可操作的电偏压施加到液晶单元。 围绕手性向列材料设置的反射镜限定了共振光学腔。 在第一电偏压下，标准具通过选定的液晶扭转角和腔厚度对第一波长的光透射，在该厚度下，不同的非等本征模同时达到共振条件。 在投影仪实施例中，具有场顺序图像投影光源的投影系统与液晶标准具耦合，将标准具电极图案化为限定显示区域的像素，并且投影仪以场顺序照明模式操作。

公开(公告)号：US20090322971A1

公开(公告)日：2009-12-31

申请号：US12112219

申请日：2008-04-30

申请人： Enkh-Amgalan Dorjgotov ,  Philip J. Bos ,  Achintya K. Bhowmik

发明人： Enkh-Amgalan Dorjgotov ,  Philip J. Bos ,  Achintya K. Bhowmik

IPC分类号： G02F1/1335 ,  G02F1/13

CPC分类号： G02F1/216 ,  G02F1/1397

摘要： A liquid crystal etalon includes a chiral nematic material contained in a liquid crystal cell having alignment surfaces configured to bias the chiral nematic material toward a twisted liquid crystal configuration with a twist less than 360°. Electrodes are arranged to apply an operative electrical bias to the liquid crystal cell. Mirrors disposed about the chiral nematic material define a resonant optical cavity. At a first electrical bias the etalon is transmissive for light of a first wavelength via a selected liquid crystal twist angle and cavity thickness at which different non-equal eigenmodes reach resonance conditions simultaneously. In a projector embodiment, a projection system with a field sequential image projection light source is coupled with the liquid crystal etalon, the etalon electrodes are patterned into pixels defining a display area, and the projector is operated in a field sequential illumination mode.

摘要翻译： 液晶标准具包括液晶单元中的手征向列型材料，该液晶单元具有对准表面，该取向表面配置为以小于360度的扭曲将手性向列相向扭曲的液晶结构偏移。 电极被布置成将可操作的电偏压施加到液晶单元。 围绕手性向列材料设置的反射镜限定了共振光学腔。 在第一电偏压下，标准具通过选定的液晶扭转角和腔厚度对第一波长的光透射，在该厚度下，不同的非等本征模同时达到共振条件。 在投影仪实施例中，具有场顺序图像投影光源的投影系统与液晶标准具耦合，将标准具电极图案化为限定显示区域的像素，并且投影仪以场顺序照明模式操作。