| 摘要 |
PROBLEM TO BE SOLVED: To obtain high luminance by the back light of a liquid crystal panel by using an anisotropic scattering element in which scattering particles having >=1 aspect ratio are dispersed and arranged in a supporting medium having a different refractive index from that of the particles to exchange polarized light. SOLUTION: Scattering particles 11 having >=1 aspect ratio are dispersed and arranged in a medium 12 having different refractive index from that of the particles. The scattering particles 11 are in a rod or ellipsoid shape (a) or may be in a laminar state (b). Even when the particle is planer, it can be used as far as it has a different aspect ratio. The scattering particles 11 show anisotropy for the polarizing components with the minor axial length and major axial length of particles. Or, such particles are preferably used since the minor axial length of the particle 11 is less than the Rayleigh scattering region but the major axial length is in the Mie scattering or geometric scattering region and has anisotropy for the polarized light component. Or, such scattering particles are preferable since the minor axial length of the particle is shorter than the wavelength of the light used. As for the scattering particles 11, one kind of particles selected from titanium oxide and glass can be used. |
