Optical filters for plasma display panels using organic dyes and sputtered multilayer coatings

Abstract

Optical filters for plasma display panels (PDPs) have been studied. We obtained the sputtered seven-layer coatings (comprising alternate layers of silver and indium–tin–oxide) on substrates of polyethylene terephthalate by a roll-to-roll process. The coatings were designed in order to minimize interfacial reflectance between the coatings and the adjacent layer to it. The coatings have a surface resistance of 2.2 Ω/sq, a transmittance of 1%∼12% in the near-infrared region of 800–1200 nm, and visible-light transmittance of approximately 70%. In combination with these multilayer coatings working as shields of electromagnetic wave and near-infrared light, organic dyes were also applied to control transmission properties of the optical filters and to improve PDPs picture quality.