摘要:
As the polarizing fiber of the present invention, the cross sectional form perpendicular to the longitudinal direction has a sea-island structure, and the cross sectional form is continuously made up in the longitudinal direction. A resin (sea component) that constitutes the sea region of the sea-island structure comprises a dichroic dye, and a resin (island component) that constitutes the island regions of the sea-island structure is a transparent resin.The polarizing fiber of the present invention may be used as a forming material of a polarizer, for example. By using the above polarizing fiber, a polarizer wherein unevenness of the transmittance is small and cracks are less generated may be formed.
摘要:
Disclosed herein is a depolarizing film which is excellent in productivity and can have a large area. The depolarizing film is obtained by using birefringent very short fibers instead of inorganic birefringent crystals, such as calcite, for use in conventional depolarizing elements.
摘要:
A liquid crystal display apparatus according to an embodiment of the invention includes: a liquid crystal cell; polarizing plates placed on both sides of the liquid crystal cell; a light diffusing element provided outside of the polarizing plate on a viewer side; and a backlight unit provided outside of the polarizing plate on an opposite side of the viewer side. The backlight unit includes a collimated light source device that emits collimated light having a brightness half-value angle of 3° to 35° toward the liquid crystal cell, and a ratio Fw(BL)/Fw(FD) between a diffused light half-value angle Fw(FD) of the light diffusing element and the brightness half-value angle Fw(BL) of the collimated light is 0.5 or less.
摘要:
A light diffusing film having superior productivity can be obtained by using very short fibers as a substitute for conventional spherical fine particles as light diffusing material. It is possible to mass-produce very short fibers at low cost, for example, by cutting fibers. Further, it is relatively easy to obtain very short fibers with a narrow fiber length distribution. The use of this makes it possible to carry out more highly sophisticated optical design of light diffusing films.
摘要:
Disclosed herein is a depolarizing film which is excellent in productivity and can have a large area. The depolarizing film is obtained by using birefringent very short fibers instead of inorganic birefringent crystals, such as calcite, for use in conventional depolarizing elements.
摘要:
A liquid crystal display apparatus according to an embodiment of the invention includes: a liquid crystal cell; polarizing plates placed on both sides of the liquid crystal cell; a light diffusing element provided outside of the polarizing plate on a viewer side; and a backlight unit provided outside of the polarizing plate on an opposite side of the viewer side. The backlight unit includes a collimated light source device that emits collimated light having a brightness half-value angle of 3° to 35° toward the liquid crystal cell, and a ratio Fw(BL)/Fw(FD) between a diffused light half-value angle Fw(FD) of the light diffusing element and the brightness half-value angle Fw(BL) of the collimated light is 0.5 or less.
摘要:
There is provided a process for production of a light-diffusing film 10 including a plurality of short fibers 11 and a transparent resin 12 for binding the short fibers 11 to each other. The production process of the present invention includes a step A of converting the plurality of short fibers 11 into a prefilm by a paper-making process, and a step B of coating a coating solution capable of forming the transparent resin 12 on at least one surface of the prefilm obtained in the step A, and solidifying or curing the coating solution coated on the prefilm to form a light-diffusing film 10. This production process can increase productivity of the light-diffusing film 10 since a production rate of the prefilm is higher than that of a conventional production process.
摘要:
A light diffusion film (20) having small back scattering can be obtained by using fibers having two kinds of birefringent regions (21A) and (21B). An outer portion of fiber (21) is a first birefringent region 21A and an inner portion of fiber (21) is a second birefringent region (21B). While the first birefringent region (21A) is in contact with a transparent resin (22), the second birefringent region (21B) is not in contact with the transparent resin (22). When a refractive index (n1) in major axis direction of the first birefringent region (21A) is a value between a refractive index n2 in major axis direction of the second birefringent region (21B) and a refractive index n0 of the transparent resin (22), interface reflection between the transparent resin (22) and the fiber (21) can be reduced, which leads to obtain a light diffusion film (20) having small back scattering.
摘要:
There is provided a light diffusing element of a thin film, which has high light diffusibility and a small depolarization factor. A light diffusing element according to an embodiment of the present invention includes: a first region having a first refractive index; a refractive index modulation region having a substantially spherical shell shape, which surrounds the first region; and a second region having a second refractive index, which is positioned on a side of the refractive index modulation region opposite to the first region. The light diffusing element has a haze of 90% to 99.9% and a depolarization factor of 0.2% or less.
摘要:
A spot welding system including a spot welding gun having a pair of electrodes disposed opposite to each other, and a servo motor for allowing the pair of electrodes to approach each other and separate from each other; a robot for movably holding either a spot welding gun or a workpiece so that a workpiece is disposed between the pair of electrodes of the spot welding gun; a physical quantity detection section for detecting a physical quantity correlative to torque or velocity of the servo motor; a position detection section for detecting positions of the pair of electrodes; a mode switching section for switching, by a switching command, an operation mode of the spot welding system between a spot welding mode for spot-welding the workpiece and a position correction mode for correcting a spot welding position of the workpiece; and a processing section for performing a spot welding process in the spot welding mode and a position correction process in the position correction mode.