Vehicle windshield for head-up display, vehicle incorporating it and manufacture

Patent metadata

Field	Value
Publication number	US-10703075-B2
Application number	US-201716304463-A
Country	US
Kind code	B2
Filing date	May 17, 2017
Priority date	May 26, 2016
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

A laminated vehicle windshield for head-up display, includes a first glazing, forming an exterior glazing, a lamination interlayer made of polymeric material, the lamination interlayer having a cross section which decreases in wedge shape from the top toward the bottom of the laminated glazing, a second glazing, forming an interior glazing, the second main face and the third main face being the internal faces of the laminated glazing, a set of diodes, each diode emitting in the direction of the interior glass. For each of the diodes, the lamination interlayer includes a blind aperture housing the diode.

First claim

The invention claimed is:

1. A vehicle laminated windshield for head-up display, comprising:
a laminated glazing comprising:
a first glazing, forming an exterior glazing, with first and second main faces;
a lamination interlayer made of polymeric material, the lamination interlayer having a cross section which decreases in wedge shape from a top toward a bottom of the laminated glazing;
a second glazing, forming an interior glazing, with third and fourth main faces,

the second main face and the third main face being the internal faces of the laminated glazing,
between the second main face and the third main face, one or more inorganic light-emitting diodes, each inorganic light-emitting diode having an emitting face capable of emitting, in a direction of the third main face, a signaling light, and each inorganic light-emitting diode having an edge face, each inorganic light-emitting diode being of submillimetric thickness,
for each inorganic light-emitting diode, the lamination interlayer comprises a blind aperture surrounding the edge face of the inorganic light-emitting diode and/or, for a group of inorganic light-emitting diodes, the lamination interlayer comprises a common blind aperture surrounding said group of inorganic light-emitting diodes,
wherein the lamination interlayer is formed either by a single sheet of polymeric material or by a laminated assembly of at least a first sheet and a second sheet of polymeric material,
said single sheet having a first main face in which a first cut-out portion is present to form said blind aperture or said common blind aperture,
said first sheet of polymeric material being of unvarying thickness and said second sheet of polymeric material having a cross-section which decreases in wedge shape from the top toward the bottom of the laminated glazing, said first sheet of polymeric material or said second sheet of polymeric material having a second main face in which a second cut-out portion is present to form said blind aperture or said common blind aperture.

2. The vehicle laminated windshield as claimed in claim 1 , wherein a remaining thickness between a bottom of the blind aperture and the opposite face is at least 0.1 mm.

3. The vehicle laminated windshield as claimed in claim 1 , wherein walls of a blind aperture of the lamination interlayer are spaced out by at most 0.5 mm from the edge face of the inorganic light-emitting diode and/or the walls of a common blind aperture of the lamination interlayer are spaced out by at most 0.5 mm from the group of inorganic light-emitting diodes.

4. The vehicle laminated windshield as claimed in claim 1 , wherein the lamination interlayer comprises a poly(vinyl butyral) (PVB), or a composite PVB/plastic film or PVB/plastic film/PVB element.

5. The vehicle laminated windshield as claimed in claim 1 , wherein the lamination interlayer comprises a composite PVB/plastic film or PVB/plastic film/PVB element, the plastic film carrying a functional layer.

6. The vehicle laminated windshield as claimed in claim 1 , wherein the lamination interlayer comprises a PVB with a thickness ranging from 0.5 to 0.9 mm, the inorganic light-emitting diodes are surface mount devices mounted on a front face of a diode carrier of thickness of at most 0.15 mm.

7. The vehicle laminated windshield as claimed in claim 1 , wherein the inorganic light-emitting diode or diodes are surface mount devices mounted on a diode carrier.

8. The vehicle laminated windshield as claimed in claim 1 , wherein the inorganic light-emitting diode or diodes are surface mount devices mounted on a diode carrier, and a lamination interlayer is also between a back face of the diode carrier and the second main face.

9. The vehicle laminated windshield as claimed in claim 1 , wherein the inorganic light-emitting diode or diodes are in a bottom part of the windshield.

10. The vehicle laminated windshield as claimed in claim 1 , wherein the inorganic light-emitting diode or diodes are surface mount devices mounted on a diode carrier a back face of which is mounted on the second main face, and the inorganic light-emitting diode or diodes are positioned in a region of the windshield in which the exterior glazing is rendered opaque by an opaque layer, and/or in which the interior glazing is rendered opaque by an opaque layer, and then comprising at least one gap in line with the inorganic light-emitting diodes.

11. The vehicle laminated windshield as claimed in claim 1 , wherein the luminous signaling by the inorganic light-emitting diode or diodes is an anti-collision system and/or the or one of the inorganic light-emitting diodes is a luminous indicator of a touch on/off switch between the second main face and the third main face or on the fourth main face.

12. A vehicle comprising at least one laminated windshield as claimed in claim 1 .

13. A process for the manufacture of the laminated windshield for head-up display, the laminated windshield including
a laminated glazing comprising:
a first glazing, forming an exterior glazing, with first and second main faces;
a lamination interlayer made of polymeric material, the lamination interlayer having a cross section which decreases in wedge shape from a top toward a bottom of the laminated glazing;
a second glazing, forming an interior glazing, with third and fourth main faces,

the second main face and the third main face being the internal faces of the laminated glazing,
between the second main face and the third main face, one or more inorganic light-emitting diodes, each inorganic light-emitting diode having an emitting face capable of emitting, in a direction of the third main face, a signaling light, and each inorganic light-emitting diode having an edge face, each inorganic light-emitting diode being of submillimetric thickness,
for each inorganic light-emitting diode, the lamination interlayer comprises a blind aperture surrounding the edge face of the inorganic light-emitting diode and/or, for a group of inorganic light-emitting diodes, the lamination interlayer comprises a common blind aperture surrounding said group of inorganic light-emitting diodes, the method comprising:

cutting out of a first sheet of lamination interlayer of unvarying thickness in order to form one or more local apertures;
providing a second sheet of lamination interlayer having a cross section decreasing in wedge shape from the top toward the bottom of the laminated glazing; and
assembling the laminated glazing.

14. The process for the manufacture of a laminated windshield as claimed in claim 13 , wherein, before the assembling, the inorganic light-emitting diode or diodes are in through apertures of the first interlayer sheet.

15. A process for the manufacture of a laminated windshield for a head-up display, the laminated windshield including
a laminated glazing comprising:
a first glazing, forming an exterior glazing, with first and second main faces;
a lamination interlayer made of polymeric material, the lamination interlayer having a cross section which decreases in wedge shape from a top toward a bottom of the laminated glazing;
a second glazing, forming an interior glazing, with third and fourth main faces,

the second main face and the third main face being the internal faces of the laminated glazing,
between the second main face and the third main face, one or more inorganic light-emitting diodes, each inorganic light-emitting diode having an emitting face capable of emitting, in a direction of the third main face, a signaling light, and each inorganic light-emitting diode having an edge fac

Assignees

• Saint Gobain

Inventors

• Bauerle Pascal

Classifications

• G09F9/33

  being semiconductor devices, e.g. diodes · CPC title

• B32B2307/418

  Refractive · CPC title

• B60K35/00

  Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles · CPC title

• B60K35/23

  Head-up displays [HUD] (optical aspects of head-up displays G02B27/01) · CPC title

• B60K35/60

  Instruments characterised by their location or relative disposition in or on vehicles (arrangements of lighting devices on dashboards B60Q3/10) · CPC title