Operating or display element with back-lit symbols - produced by paint or film layers on basic body

摘要

Operating, decorative or display element consists of a clear transparent basic body with a diffuse-transparent layer, over which is a clear transparent layer, which is partially removed by laser irradiation to form a symbol, with an opaque layer over it. The basic body may be coated with paint layers or films, pref. based on polycarbonate, which may be metallised. ADVANTAGE - Back-lit symbol has uniform transparency.