High-luminance light box used to illuminate display screens with optical valves such as liquid-crystal matrix screens, has fluorescent tubes spread out in many superposed layers

摘要

The axes of the fluorescent tubes of each layer are parallel to each other, equidistant, and separated from a first distance and situated in the same plane layer, with another distance separating two successive layers. The light box (7) for the viewing screen (1) of an optical valve (6) includes a lighting arrangement having many fluorescent cylindrical tubes (92). The box has a mechanical structure, having a top recess, lateral walls and a bottom. The optical valve is positioned in the top recess, and the fluorescent tubes are spread out in many superposed layers, the plane of these layers being parallel between them and parallel to the optical valve.