Composite glass with an intermediate film that changes colour depending on the viewing angle

Patent metadata

Field	Value
Publication number	US-11745474-B2
Application number	US-201917273265-A
Country	US
Kind code	B2
Filing date	Sep 2, 2019
Priority date	Sep 7, 2018
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

A composite glass comprises two glass and/or plastic plates and an intermediate foil arranged between the glass and/or plastic plates. The composite glass, due to the intermediate foil, is configured differently in a side-dependent manner, by appearing to a viewer more transparent from an inner side than from an outer side. The composite glass, due to the intermediate foil, appears to the viewer different in a viewing angle-dependent manner from the outer side.

First claim

The invention claimed is:

1. A composite glass comprising:
a first plate, the first plate being a glass plate or a plastic plate;
a second plate, the second plate being a glass plate or a plastic plate; and
an intermediate foil arranged between the first plate and the second plate,
wherein the composite glass, due to the intermediate foil, is configured in a side-dependent manner by appearing to a viewer more transparent from a first side than viewed from a second side,
wherein the composite glass, due to the intermediate foil, is configured in an angle-dependent manner from the second side by appearing different from a first angle on the second side than from a second angle on the second side, and
wherein the intermediate foil comprises an interference layer construction, the interference layer construction comprising at least three sublayers, at least one color hue being determined by the thickness of a spacer layer.

2. The composite glass according to claim 1 , wherein the composite glass is semitransparent viewed from the first side and has a reflective effect viewed from the second side.

3. The composite glass according to claim 1 , wherein the intermediate foil at a first viewing angle, in a first viewing angle range, shows a first appearance, and at a second viewing angle, in a second viewing angle range, shows a second appearance, including:
appearing, depending on the viewing angle, either in a first color hue or uncolored or in a second color hue, respectively reflective or non-reflective,
showing, depending on the viewing angle, a movement of a motif or of several partial areas,
showing, or not showing, depending on the viewing angle, a motif,
showing, depending on the viewing angle, a motif in different three-dimensional views, or
showing, depending on the viewing angle, a first motif or a second motif.

4. The composite glass according to claim 1 , wherein the intermediate foil is formed by a plurality of individual intermediate foil pieces.

5. The composite glass according to claim 1 , wherein the intermediate foil is present over a full area of the composite glass or in a netlike manner or with a plurality of recesses.

6. The composite glass according to claim 1 , wherein at least one, exactly two or all the present ones of the following sublayers of the intermediate foil are configured over a full area in the intermediate foil:
non-reflective partial layer,
partial foil layer,
pigment layer,
relief layer,
first reflector layer,
spacer layer, or
semitransparent reflector layer.

7. The composite glass according to claim 1 , wherein the intermediate foil has a semitransparent effect, since
an opaque partial layer or a matt structure of the intermediate foil is configured on part of the area in the intermediate foil, or
a semitransparent partial layer of the intermediate foil is configured over the full area.

8. The composite glass according to claim 1 , wherein the intermediate foil comprises a relief layer, including an embossed foil layer or an embossed partial layer with an embossing having a coloring effect on the second side that creates the viewing angle dependence on the second side or has a matt structure effect on the first side.

9. A window comprising:
a composite glass according to claim 1 ; and
a composite glass holder.

10. The composite glass according to claim 1 , wherein first side is an inner side of the composite glass and the second side is an outer side of the composite glass.

11. The composite glass according to claim 1 , wherein first side is an outer side of the composite glass and the second side is an inner side of the composite glass.

12. The composite glass according to claim 1 , wherein first plate is a glass plate and the second plate is a glass plate.

13. The composite glass according to claim 1 , wherein first plate is a plastic plate and the second plate is a plastic plate.

14. The composite glass according to claim 1 , wherein first plate is a glass plate and the second plate is a plastic plate.

15. The composite glass according to claim 1 , wherein first plate is a plastic plate and the second plate is a glass plate.

16. The composite glass according to claim 1 , wherein the intermediate foil is formed by a plurality of individual intermediate foil pieces arranged in a gridded manner.

17. A manufacturing method for a composite glass according to claim 1 ,
supplying an intermediate foil which appears in a side-dependent manner by appearing to a viewer more transparent from a first side than viewed from a second side,
embedding the intermediate foil between a first plate and a second plate, the first plate being a glass plate or a plastic plate and the second plate being a glass plate or a plastic plate,
wherein the intermediate foil is configured in an angle-dependent manner from the second side by appearing different from a first angle on the second side than from a second angle on the second side, and
wherein the intermediate foil comprises an interference layer construction, the interference layer construction comprising at least three sublayers, at least one color hue being determined by the thickness of a spacer layer.

18. A composite glass comprising:
a first plate, the first plate being a glass plate or a plastic plate;
a second plate, the second plate being a glass plate or a plastic plate; and
an intermediate foil arranged between the first plate and the second plate,
wherein the composite glass, due to the intermediate foil, is configured in a side-dependent manner by appearing to a viewer more transparent from a first side than viewed from a second side,
wherein the composite glass, due to the intermediate foil, is configured in an angle-dependent manner from the second side by appearing different from a first angle on the second side than from a second angle on the second side,
wherein the intermediate foil comprises a relief structure that causes the angle-dependent manner of the composite glass due to the intermediate foil.

19. The composite glass according to claim 18 , wherein the intermediate foil comprises an interference layer construction, the interference layer construction comprises at least three sublayers, at least one color hue being determined by the thickness of a spacer layer.

20. The composite glass according to claim 18 , wherein the composite glass is semitransparent viewed from the first side and has a reflective effect viewed from the second side.

21. The composite glass according to claim 18 , wherein the intermediate foil at a first viewing angle, in a first viewing angle range, shows a first appearance, and at a second viewing angle, in a second viewing angle range, shows a second appearance, including:
appearing, depending on the viewing angle, either in a first color hue or uncolored or in a second color hue, respectively reflective or non-reflective,
showing, depending on the viewing angle, a movement of a motif or of several partial areas,
showing, or not showing, depending on the viewing angle, a motif,
showing, depending on the viewing angle, a motif in different three-dimensional views, or
showing, depending on the viewing angle, a first motif or a second motif.

22. The composite glass according to claim 18 , wherein the intermediate foil is formed by a plurality of individual intermediate foil pieces.

23. The composite glass according to claim 18 , wherein the intermediate foil is present over a full area of the com

Assignees

• Giesecke & Devrient Currency Technology Gmbh

Inventors

• Scherer Maik Rudolf Johann
• Dehmel Raphael
• Scherer Kai Herrmann
• Lenssen Daniel
• Rahm Michael
• Keller Mario

Classifications

• B32B17/10504 Primary

  Liquid crystal layer · CPC title

• B32B17/1022

  Metallic coatings · CPC title

• B32B17/10036 Primary

  comprising two outer glass sheets · CPC title

• B44F1/066

  comprising at least two transparent elements, e.g. sheets, layers (layered products of glass and synthetic resin containing decorations or patterns B32B17/10247; window units comprising two or more parallel glass panes E06B3/66) · CPC title

• B44F1/10

  Changing, amusing, or secret pictures · CPC title