ORIENTATED FILM HAVING PORES

摘要

An orientated film which has a characteristic that the scattering degree of light is varied with the incident angle of the light and which is useful for the improvement of image quality on a liquid crystal display, particularly, for a view angle improving film by which a view angle can be widened. The orientated film is made of thermoplastic polymer and has a number of fine pores which contribute to the above mentioned scattering characteristic. A film made of thermoplastic polymer is stretched in one direction under the conditions of temperature and draw ratio under which grooves are produced in the surface of the film in a direction perpendicular to the drawing direction.