Browse Prior Art Database

Backlit Panel

IP.com Disclosure Number: IPCOM000090060D
Original Publication Date: 1969-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Martin, JT: AUTHOR [+2]

Abstract

A deadfront panel is shown in an exploded view. The panel has selected information bearing surfaces which are to become visible upon illumination of the rear surface. The panel includes substrate 2 of molded transparent or translucent plastic such as polycarbonate. Front surface 3 is sprayed with a clear acrylic material to provide film 4. This is cured to protect the material of substrate 2 from solvents used in subsequent coatings. With the exception of transparent nomenclature 5 or information areas, the surface is printed with black coating 6. This is opaque to the indicator lighting to be used. Alternatively, the printing can be applied directly on the substrate and the protective coating then applied thereafter.

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Backlit Panel

A deadfront panel is shown in an exploded view. The panel has selected information bearing surfaces which are to become visible upon illumination of the rear surface. The panel includes substrate 2 of molded transparent or translucent plastic such as polycarbonate.

Front surface 3 is sprayed with a clear acrylic material to provide film 4. This is cured to protect the material of substrate 2 from solvents used in subsequent coatings. With the exception of transparent nomenclature 5 or information areas, the surface is printed with black coating 6. This is opaque to the indicator lighting to be used. Alternatively, the printing can be applied directly on the substrate and the protective coating then applied thereafter. This occurs if it is found more expedient to fill and level the surface with the protective coating material or if the process is more efficiently accomplished by reversing the process steps. The surface is then sprayed with final coating 7 of flattened urethane. This affords light transmission qualities while providing resistance to abrasion and chemical action. Additional urethane coating 8 can be applied to the rear surface as a diffusion coating to further eliminate any possible discrete definition of the light source such as a lamp filament. The panel can be formed to provide cutout areas and selectively illuminated over discrete areas of the rear surface to provide for visibility of indicia.

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