Light-scattering film and liquid crystal device using the film
First Claim
1. A light-scattering film comprising a light-scattering layer containing a transparent resin and a scattering material, wherein a rectilinear transmittance of an incident light exhibits a maximum at an oblique incident direction to the film surface when a linear polarized light, in which a vibrating direction and a propagating direction exist in a plane containing an axis of a surface direction of the film and an axis of a thickness direction of the film, is incident on the film surface.
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Accused Products
Abstract
A light-scattering film 10 is obtained by subjecting a birefringent material in a resin layer to orientation treatment, in which at least one component selected from a transparent resin 6 and a scattering material 7 is the birefringent material (e.g., a birefringent resin, a liquid crystalline material). According to the light-scattering film, in the case where a linear polarized light in which a vibrating direction and a propagating direction exist in a plane containing a surface-directional axis of the film and a thickness-directional axis of the film is incident at a film surface, the rectilinear transmittance of the incident light shows maximum at an oblique incident direction to the film surface (e.g., incident angle of 20 to 89°). The rectilinear transmittance of the incident light from a direction perpendicular to the film surface is 0 to 30%, and the rectilinear transmittance of the incident light from an oblique direction having an incident angle of 40 to 70° to the film surface is 50 to 100%. Directivity in a light-scattering property of the light-scattering film is improved, and even when an incident light comes from an oblique direction, brightness of the display surface from a front direction is improved. Therefore, the film is useful for employing in combination with a polarized plate of the liquid crystal display apparatus.
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Citations
20 Claims
- 1. A light-scattering film comprising a light-scattering layer containing a transparent resin and a scattering material, wherein a rectilinear transmittance of an incident light exhibits a maximum at an oblique incident direction to the film surface when a linear polarized light, in which a vibrating direction and a propagating direction exist in a plane containing an axis of a surface direction of the film and an axis of a thickness direction of the film, is incident on the film surface.
Specification