Patent ID: 8132930
Filing Date: 2012-03-13
Classification: H03J

Abstract:
1. A display device for a musical tuning apparatus, the display device comprising: a point light source unit group including a plurality of point light source units arranged in a row along a longitudinal direction for displaying a meter of the tuning apparatus, each point light source unit having a light emitting side, and a generally transparent cover disposed over the light emitting side of the point light source units and extending in the longitudinal direction of the arrangement of point light source units, the generally transparent cover having a shape that is curved in an arc extending generally perpendicular to the longitudinal direction, and the cover being made of a material that is free of added light diffusion material and the cover having a corrugated surface around the arc shape of the cover, where the corrugated surface has corrugations that extend in the longitudinal direction of the arrangement of point light source units.