Patent ID: 8356906

Claim:
A screen unit comprising: a transparent plate that has predetermined rigidity and optical transparency; a first lens sheet that has a rectangular sheet form, is a part of a cylindrical surface with an axis line that extends in a first direction parallel to the transparent plate, and is warped in a shape convex toward a side of the transparent plate; a second lens sheet that is located on an opposite side of the transparent plate from the first lens sheet, has a rectangular sheet form, is a part of a cylindrical surface with an axis line that extends in a direction parallel to the transparent plate and perpendicular to the first direction, is warped in a shape convex toward a side of the transparent plate, and sandwiches the transparent plate with the first lens sheet; and four rims being elongated and having U-shapes in cross section that respectively cover outer peripheries of four sides of a laminated body including the transparent plate, the first lens sheet, and the second lens sheet, wherein one of the rims parallel to the first direction has an inner side surface of a U-shape in cross section that loosely holds the outer periphery of the laminated body fitted therein with a clearance therebetween, and remaining three of the rims have elastic members each located between an inner side surface of a U-shape in cross section and a concave surface of the first lens sheet or the second lens sheet, and pinches the first lens sheet and the second lens sheet to be pressed against the transparent plate with biasing force of the elastic member to support the first lens sheet and the second lens sheet.