Information display panel
First Claim
1. An information display panel comprising a plurality of information display units arranged in a rectangular matrix of rows and columns, each display unit comprising a picture tube having a faceplate with a curved surface and an image magnifying element secured thereto, said image magnifying element comprising a Fresnel lens spaced from said face plate, each said Fresnel lens exhibiting in two perpendicular directions a curvature which corresponds to the curvature of the respective faceplate, each said Fresnel lens being concentric with the surface of the respective face plate, said display unit being arranged so that respective Fresnel lenses form a unitary picture without discontinuities.
1 Assignment
0 Petitions
Accused Products
Abstract
An image-magnifying element for use in a large-screen panel for assembling constituent pictures displayed on separate picture tubes (2) to form a new unitary picture (30) without discontinuities includes a Fresnel lens (6) whose surface (7, 8) has a curvature which is concentric with that of the faceplate (5) of the picture tube. The Fresnel lens is provided with curved upright side walls (11, 12) of a transparent material, whose outer surfaces (15) are reflecting and whose edges (13, 14) have a curvature corresponding to that of the picture tube.
20 Citations
14 Claims
- 1. An information display panel comprising a plurality of information display units arranged in a rectangular matrix of rows and columns, each display unit comprising a picture tube having a faceplate with a curved surface and an image magnifying element secured thereto, said image magnifying element comprising a Fresnel lens spaced from said face plate, each said Fresnel lens exhibiting in two perpendicular directions a curvature which corresponds to the curvature of the respective faceplate, each said Fresnel lens being concentric with the surface of the respective face plate, said display unit being arranged so that respective Fresnel lenses form a unitary picture without discontinuities.
- 9. An information display unit comprising a picture tube having a faceplate with a curved surface and an image magnifying element secured thereto, said image magnifying element comprising a Fresnel lens spaced from said face plate, said Fresnel lens exhibiting in two perpendicular directions a curvature which corresponds to the curvature of the faceplate, said Fresnel lens being concentric with the surface of the faceplate, said magnifying element further comprising upright sidewalls extending from edges of said Fresnel lens to said faceplate, said sidewalls being made of transparent material, the outer surfaces of said sidewalls being reflective.
Specification