# US 2013/0252001 A1 · Laminated glass panel for head-up display system

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- Number: US 2013/0252001 A1
- Document ID: US20130252001A1
- Status: Published application
- Kind: A1
- Application number: 13/990,261
- Filed: 2011-11-30
- Published: 2013-09-26
- Earliest claimed: 2010-12-03
- Assignees: Saint-Gobain Glass France
- Inventors: Jean Sablayrolles; Alexandra Dekoninck; Michael Labrot
- Web page: https://patentgrep.com/patent/US20130252001A1

## CPC

- B32B 17/10678: {comprising UV absorbers or stabilizers, e.g. antioxidants}
- B32B 17/10669: {Luminescent agents}
- B32B 17/10761: {containing vinyl acetal}
- C08K 5/1345: {Carboxylic esters of phenolcarboxylic acids}
- Y10T 428/31601: Quartz or glass
- Y10T 428/31627: Next to aldehyde or ketone condensation product
- Y10T 428/3163: Next to acetal of polymerized unsaturated alcohol [e.g., formal butyral, etc.]
- Y10T 428/31645: Next to addition polymer from unsaturated monomers
- Y10T 428/31649: Ester, halide or nitrile of addition polymer
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The present invention relates to a laminated glazing for information display, of the automobile windshield or architectural glazing type, comprising an assembly of at least two transparent sheets of inorganic glass or of a strong organic material, joined together by an interlayer of a thermoformable material or by multilayer foils incorporating such an interlayer, said glazing being characterized in that a luminophore material of the hydroxyterephthalate type, combined with an antioxidant additive, is integrated into said interlayer, allowing said display. The invention also relates to a device for displaying an image on transparent glazing, comprising laminated glazing of the above type and a source generating concentrated UV radiation of the laser type, the radiation of which is between 350 and 410 nm, the UV radiation being directed onto the area or areas of the glazing comprising the terephthalate-type luminophore layer.

## Claims

### Claim 1

A laminated glazing, comprising an assembly comprising at least two transparent sheets of inorganic glass or of a strong organic material, joined together by an interlayer of a thermoformable material or by a multilayer foil comprising the interlayer,
wherein the interlay comprises a hydroxyterephthalate luminophore material and an antioxidant additive.

### Claim 2 (depends on 1)

The laminated glazing of claim 1, in wherein luminophore is a hydroxyalkylterephthalate, R—OOC-Φ(OH)x—COOR, of formula:
wherein Φ denotes a benzene ring substituted with at least one hydroxyl (OH) group, R is a hydrocarbon chain comprising 1 to 10 carbon atoms and x is equal to 1 or 2.

### Claim 3 (depends on 1)

The laminated glazing of claim 1, wherein the luminophore is a dialkyl-2,5-dihydroxyterephthalate of formula:

### Claim 4 (depends on 1)

The laminated glazing of claim 1, wherein luminophore is diethyl-2,5-dihydroxyterephthalate.

### Claim 5 (depends on 1)

The laminated glazing of claim 1, wherein the antioxidant additive is a phenylamine.

### Claim 6 (depends on 5)

The laminated glazing of claim 5, wherein the antioxidant additive is a diphenylamine group.

### Claim 7 (depends on 1)

The laminated glazing of claim 1, wherein the antioxidant additive comprises a benzene cycle comprising at least two OH functions.

### Claim 8 (depends on 7)

The laminated glazing of claim 7, wherein the antioxidant is a resorcinol.

### Claim 9 (depends on 7)

The laminated glazing of claim 7, wherein the antioxidant additive is a pyrocatechol.

### Claim 10 (depends on 7)

The laminated glazing of claim 7, in wherein the antioxidant additive is a hydroquinone.

### Claim 11 (depends on 7)

The laminated glazing of claim 7, in wherein the antioxidant additive is a pyrogallol.

### Claim 12 (depends on 7)

The laminated glazing of claim 7, wherein the antioxidant additive is a phloroglucinol.

### Claim 13 (depends on 1)

The laminated glazing of claim 1, wherein the thermoformable material of the interlayer is at least one selected from the group consisting of a PVB, a plasticized PVC, a polyurethane (PU), and an ethylene-vinyl acetate (EVA).

### Claim 14 (depends on 1)

A device, comprising:
the laminated glazing of claim 1; and
a source generating concentrated UV laser radiation, wherein the radiation is between 350 and 410 nm, and
wherein the UV radiation is directed onto an area or areas of the glazing comprising the hydroxyterephthalate luminophore layer.