| 摘要 |
PURPOSE:To utilize polarized light conventionally having absorbed by an organic polarizing plate by converting the polarizing direction thereof by providing a light diffusion means and a light polarization means polarizing light emitted from the light diffusion means in the vertical direction to the light emitting surface of a surface- like light transmission body between the surface-like light transmission body and a polarization and separation surface. CONSTITUTION:This direct viewing type illumination device for a display element is provided with the surface-like light transmission body 4, a light source 1 arranged so that the light is made incident on the body 4 from the side part, a light reflecting surface 5 provided on the opposite surface to the light emitting surface of the body 4 and the polarization and separation surface 12 which is provided on the light emitting surface side of the body 4, where the (p) polarized component of a light beam near a prescribed incident direction is transmitted and at least one part of an (s) polarized component is reflected and whose cross section is almost W-shaped. Then, a light diffusion plate 7 and a prism array 8 polarizing the light emitted from the plate 7 in the vertical direction to the light emitting surface of the body 11 are provided between the body 4 and the surface 12. |
