PARABREZZA AUTOMOBILISTICO PER UN SISTEMA DI VISUALIZZAZIONE A TESTA ERETTA

• Main Author: FREEMAN GLENN E
• Format: Patent
• Language: Italian
• Published: 19.08.1992
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; GLASS; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; JOINING GLASS TO GLASS OR OTHER MATERIALS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; MINERAL OR SLAG WOOL; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PERFORMING OPERATIONS; PHYSICS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TRANSPORTING; VEHICLES IN GENERAL

PURPOSE: To reduce the degree of double imaging of a head-up display system by projecting images onto nonparallel windshield glass wherein glass plies with inner and outer major surfaces each having a tapered thickness from one edge to the other edge are fixedly laminated using a sheet of thermoplastic interlayer material. CONSTITUTION: One or both of the glass plies 232, 234 of the windshield glass of an automobile is provided with a taper, and when an assembly 230 is laminated to form a unitary structure using a non-stretched interlayer 236, opposing surfaces 234, 236 of the windshield glass 230 are non-parallel and are oriented relative to each other so as to eliminate double imaging. It is further contemplated that one or more tapered interlayers may be used in combination with one or more tapered glass plies so that the final laminated assembly forms a required windshield glass construction having the configuration required to reduce double imaging.