Patent ID: 7083292

Claim:
A resin sheet suitable for being disposed in front of a plasma display panel and transmitting a rectilinear light, wherein the sheet has a transparent section and a dark section adjacent to the transparent section, the transparent section and the dark section are alternately arranged in the direction of the sheet surface, the transparent section comprises a soft resin, and the dark section comprises a soft resin and a dark colorant, and the soft resins constituting each of the transparent and dark sections comprise at least one member selected from the group consisting of an olefinic resin, a halogen-containing resin, a vinyl alcohol-series resin, a vinyl ester-series resin, a (meth)acrylic resin, an aliphatic polyester-series resin, a polyamide-series resin, and a thermoplastic elastomer, the ratio [P/T] of the periodic width P of the dark section relative to the thickness T of the sheet is 1/1 to 1/1.8, and the ratio [W 1 /W 2 ] of the width W 1 of the transparent section relative to the width W 2 of the dark section is 30/1 to 10/1.