| 摘要 |
<p>A polarization converter, and a projection-type display device using the same, is disclosed having two or more comb polarization-separation prism arrays that are arranged, with regard to the alignment of alternating polarizing beam splitter films and reflection films on adjacent prism surfaces, in rows that are non-parallel to one another. Each comb polarization-separation prism array is formed by adjacent prisms arranged in a row such that each adjacent prism has, on one surface thereof, either a polarizing beam-splitter film or a reflection film, with these films being arranged alternately in said row. Preferable, the angle between the rows of the two or more comb polarization-separation prism arrays is substantially 90 degrees. Such an arrangement enables the polarization converter to more efficiently utilize the light that is incident non-uniformly on regions of lenticular lens array elements of the output surface of a light integrator that is used in conjunction with the polarization converter in order to provide a uniform, bright image to a projection-type display device which uses the polarization converter.</p> |
