Invention Grant
- Patent Title: Laminated glazing for use as a head-up display screen
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Application No.: US15039472Application Date: 2014-11-25
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Publication No.: US09770888B2Publication Date: 2017-09-26
- Inventor: Corinne Payen , David Fournier
- Applicant: SAINT-GOBAIN GLASS FRANCE
- Applicant Address: FR Courbevoie
- Assignee: SAINT-GOBAIN GLASS FRANCE
- Current Assignee: SAINT-GOBAIN GLASS FRANCE
- Current Assignee Address: FR Courbevoie
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: FR1361723 20131127
- International Application: PCT/FR2014/053026 WO 20141125
- International Announcement: WO2015/079158 WO 20150604
- Main IPC: G10K11/172
- IPC: G10K11/172 ; B32B17/10 ; G10K11/168

Abstract:
A laminated glazing used as a head-up display screen includes two sheets of glass and a viscoelastic plastic interlayer arranged between the sheets of glass. The interlayer includes at least one layer made of viscoelastic plastic with vibro-acoustic damping properties. The interlayer has a cross section that decreases in a wedge shape from the top to the bottom of the glazing. A resonant frequency f2 of the second resonance mode of a laminated glazing bar with a surface area of 25 mm×300 mm composed of two glass sheets each 2.1 mm thick, between which is incorporated the interlayer, determined by measuring the mechanical impedance (MIM) at 20° C. according to standard ISO 16940, is between 760 Hz and 1000 Hz and the loss factor η2 of the second resonance mode of the same bar, determined by MIM under the same conditions, is greater than or equal to 0.25.
Public/Granted literature
- US20160375659A1 LAMINATED GLAZING FOR USE AS A HEAD-UP DISPLAY SCREEN Public/Granted day:2016-12-29
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