A composition includes a metal particle and a resin and has a wavelength band A having a wavelength band width of 1 m or more in a wavelength range of 1 to 14 m and a wavelength band B having a lower absorbance than the wavelength band A and having a wavelength band width of 1 m or more, and a ratio A.sub.min/B.sub.max between a minimum value A.sub.min of an absorbance of the wavelength band A and a maximum value B.sub.max of an absorbance of the wavelength band B is 3 or more.

A composition includes a metal particle and a resin and has a wavelength band A having a wavelength band width of 1 m or more in a wavelength range of 1 to 14 m and a wavelength band B having a lower absorbance than the wavelength band A and having a wavelength band width of 1 m or more, and a ratio A.sub.min/B.sub.max between a minimum value A.sub.min of an absorbance of the wavelength band A and a maximum value B.sub.max of an absorbance of the wavelength band B is 3 or more.

A transparent screen for 3D display having excellent transparency and an excellent viewing angle, and a 3D display system are provided. The transparent screen for 3D display has a plurality of dots, each of the dots having wavelength selectivity and being formed of a liquid crystal material having a cholesteric structure, in which the cholesteric structure gives a striped pattern of bright parts and dark parts in a cross-sectional view of the dot observed by a scanning electron microscope, the dot includes a portion having a height that increases continuously to the maximum height in a direction extending from the edge toward the center of the dot, in the portion, the angle formed by the normal line to a line that is formed by a first dark part as counted from the surface of the dot on the opposite side of the substrate and the surface of the dot is in the range of 70 to 90, and right-handed circularly polarized light and left-handed circularly polarized light are reflected by the plurality of dots.

A transparent screen for 3D display having excellent transparency and an excellent viewing angle, and a 3D display system are provided. The transparent screen for 3D display has a plurality of dots, each of the dots having wavelength selectivity and being formed of a liquid crystal material having a cholesteric structure, in which the cholesteric structure gives a striped pattern of bright parts and dark parts in a cross-sectional view of the dot observed by a scanning electron microscope, the dot includes a portion having a height that increases continuously to the maximum height in a direction extending from the edge toward the center of the dot, in the portion, the angle formed by the normal line to a line that is formed by a first dark part as counted from the surface of the dot on the opposite side of the substrate and the surface of the dot is in the range of 70 to 90, and right-handed circularly polarized light and left-handed circularly polarized light are reflected by the plurality of dots.

The present application discloses a microfluidic color filter having an array of a plurality of microfluidic color filter units. The microfluidic color filter includes a plurality of micro-chambers; and a plurality of micro-channels. Each of the plurality of microfluidic color filter units includes one of the plurality of micro-chambers; and at least two of the plurality of micro-channels respectively connected to the one of the plurality of micro-chambers. The at least two of the plurality of micro-channels are configured to provide fluids of different colors to the one of the plurality of micro-chambers. A color of each of the plurality of microfluidic color filter units is based on amounts of fluids of different colors provided to the one of the plurality of micro-chambers.

The present invention relates to a method for preparing coating layer having highly aligned nanomaterial in a lyotropic liquid crystal matrix. More specifically, it relates to a method for preparing coating layer having highly aligned nanomaterial by applying shearing force to a composite of nano material and lyotropic liquid crystal material after mixing the nano material and the lyotropic liquid crystal material. The present invention has an advantage in that orientation of nanomaterials, which have a high industrial utilization but are difficult to control orientation, can be controlled very easily and simply by applying a shearing force using a medium, such as a lyotropic liquid crystal matrix which is extractable from nature, thereby cheap and biocompatible. Further, the present invention can induce a highly aligned orientation of nanomaterials over a wide area, and can be applied to produce a plasmonic color filter film using a polarization dependent surface plasmonic resonance phenomenon of the oriented nanomaterials.

The present invention relates to a method for preparing coating layer having highly aligned nanomaterial in a lyotropic liquid crystal matrix. More specifically, it relates to a method for preparing coating layer having highly aligned nanomaterial by applying shearing force to a composite of nano material and lyotropic liquid crystal material after mixing the nano material and the lyotropic liquid crystal material. The present invention has an advantage in that orientation of nanomaterials, which have a high industrial utilization but are difficult to control orientation, can be controlled very easily and simply by applying a shearing force using a medium, such as a lyotropic liquid crystal matrix which is extractable from nature, thereby cheap and biocompatible. Further, the present invention can induce a highly aligned orientation of nanomaterials over a wide area, and can be applied to produce a plasmonic color filter film using a polarization dependent surface plasmonic resonance phenomenon of the oriented nanomaterials.

In a display method or device according to one embodiment of the present invention, at least two of a photonic crystal reflection mode, a unique color reflection mode and a transmittance tuning mode may be implemented to be switched to each other within the same unit pixel. In addition, a machine readable storage medium recording a computer program performing the display method is provided.

An electromagnetic filtering system comprising an electromagnetic radiation source, a filter chamber to filter the radiation and a filter chamber control system to selectively modify the contents of the filter chamber in order to modify the wavelengths of the radiation that pass through the filter chamber. There is also provided a method of controlling an electromagnetic filtering system that comprises a controllable filter chamber capable of being controlled so as to selectively be filled with a filter material, the method comprising determining filtering characteristics to be provided by the filtering system, determining whether the filter chamber should be filled with the filter material, and controlling the filter chamber to be filled as determined.

In one example of the disclosure, a system for limitation of energy wavelengths applied during 3D printing includes an energy source to provide energy to a target zone during a 3D printing operation. The system includes a filter chamber through which the energy is to pass before arriving at the target zone. The system includes a filter chamber control component to selectively modify the contents of the filter chamber to limit the wavelengths of energy that can pass through the filter chamber based upon type of the target zone.