Patent ID: 7233439
Filing Date: 2007-06-19
Classification: G02B,G03B

Abstract:
1. A screen member for a transmission screen, comprising: a lens substrate having a light incident face and a light emission face opposite to the light incident face, the light incident face of the lens substrate being formed with a plurality of lens portions for condensing incident light; a light shielding layer formed on the light emission face of the lens substrate, the light shielding layer having a plurality of openings on light paths of the light that has been transmitted by the lens portions of the lens substrate; and a plurality of light diffusion portions for diffusing the light that has been transmitted by each lens portion of the lens substrate, the plurality of light diffusion portions being provided on at least portions corresponding to the openings of the light shielding layer, and each of the light diffusion portions being formed into a protrusion that protrudes from the surface of the light shielding layer; wherein each of the lens portions of the lens substrate is designed so that the light transmitting lens portion is focused on the side of the light emission face of the lens substrate beyond the light shielding layer and within the protrusion of the corresponding light diffusion portion.