Patent ID: 7990618

Claim:
A screen comprising: a light-diffusing film including, a translucent support, and a translucent resin layer having a continuous irregular pattern covering an entire surface thereof and being provided on the translucent support, a surface profile of the irregular pattern being configured such that the single translucent layer both diffuses light and has anisotropy in the diffusion angle; and a reflective layer provided on a second surface of the light-diffusing film, the second surface being opposite to the first surface, wherein: a maximal value of a loss tangent (tan δ) determined from a dynamic viscoelasticity of the light-diffusing film is provided in a temperature range from about 0° C. to about 60° C., the irregular pattern on the surface of the translucent resin layer is configured so that the diffusion angle includes a first diffusion angle in a horizontal direction parallel to a plane of the translucent resin layer, and includes a second diffusion angle in a vertical direction parallel to the plane of the translucent resin layer and perpendicular to the horizontal direction, and the first diffusion angle is larger than the second diffusion angle, wherein the irregular pattern includes irregularities having curved surfaces and having a vertical size in the vertical direction and a horizontal size in the horizontal direction, and an average vertical size of all of the irregularities is greater than an average horizontal size of all of the irregularities, and wherein the irregular pattern is formed such that the density of irregularities is at least substantially uniform over the entire surface thereof.