Unabsorbing type polarizer, method for manufacturing the same, polarized light source using the same, and apparatus for liquid crystal display using the same

An apparatus for liquid crystal display comprising:

• a conductive film,
• a pair of substrates, at least one of which is transparent,
• a liquid crystal panel which is composed of liquid crystal layer that is inserted between said pair of substrates,
• a means for operating the liquid crystal layer by adding electric charge to the conductive film, and
• a polarizer which comprises:
• a medium I having birefringence so as to be able to generate two or three polarized modes of different refractive indices and
• a medium II having the property of rotating polarized light passing through it and a surface having a refractive index smaller than the largest refractive index among the two or three refractive indices of said medium I, wherein said medium I and said medium II are laminated alternately to form a plurality of layers, and
• boundaries between said laminated layers are arranged at an angle with respect to a surface of the polarizer such that one component of polarized light transmitted through said medium I is reflected at the boundary between said medium I and said medium II while another component or components of polarized light is transmitted through said medium II.

An unabsorbing type polarizer comprising:

• a medium I which has birefringence so as to be able to generate two or three polarized modes having different refractive indices, and
• a medium II which has the property of rotating polarized light passing through it and a surface having a refractive index smaller than the largest refractive index among the two or three refractive indices of said medium I, wherein
• said medium I and said medium II are laminated alternately to form a plurality of layers, and
• boundaries between said laminated layers are arranged at an angle with respect to a surface of the polarizer such that one component of polarized light transmitted through said medium I is reflect at the boundary between said medium I and said medium II, while another component or components of polarized light is transmitted through said medium II.

A polarized light source comprising:

• a light source generating unpolarized light or weakly polarized light, and
• a polarizer for providing highly polarized light by receiving and transmitting light from said light source,
• characterized in that
• said polarizer comprises:
• a medium I which has birefringence so as to be able to generate two or three polarized modes having different refractive indices, and
• a medium II which has the property of rotating polarized light passing through it and a surface having a refractive index smaller than the largest refractive index among the two or three refractive indexes of said medium I,
• wherein
• said medium I and said medium II are laminated alternately to form a plurality of layers, and
• boundaries between said laminated layers are arranged at an angle with respect to a surface of the polarizer such that one component of light transmitted through said medium I is reflected at the boundary between said medium I and said medium II, while another component or components of polarized light is transmitted through said medium II.