Display assembly comprising a glass-ceramic plate

Patent metadata

Field	Value
Publication number	US-10415788-B2
Application number	US-201013520454-A
Country	US
Kind code	B2
Filing date	Nov 30, 2010
Priority date	Jan 21, 2010
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

Display assembly 1 comprising, on the one hand, a glass-ceramic plate 2 of the lithium aluminosilicate type, the optical transmission of which for a thickness of 4 mm is between 0.2% and 4% for at least one wavelength between 400 and 500 nm and, on the other hand, a luminous device 4 , characterized in that the luminous device 4 comprises at least one polychromatic light source 5 having at least a first emission of nonzero intensity at said wavelength between 400 and 500 nm and at least a second emission of more than 500 nm, and such that the positioning of said source 5 is designed to allow display through said glass-ceramic plate 2.

First claim

The invention claimed is:

1. A display assembly, comprising a glass-ceramic plate comprising a lithium aluminosilicate and a luminous device comprising a polychromatic light source, wherein:
the glass-ceramic plate comprises, in percentages by weight:

SiO 2
64-70%

Al 2 O 3
18-25%

Li 2 O
2.5-3.8%

K 2 O
 0-<1.0

Na 2 O
   0-<1.0%

ZnO
1.2-2.8%

MgO
0.30-1.5% 

CaO
0.2-2.5%

BaO
0-3%

SrO
  0-1.4%

TiO 2
1.8-3.2%

ZrO 2
 1.0-2.5%;

an optical transmission of the glass-ceramic plate for a thickness of 4 mm is between 0.2% and 4% for at least one wavelength between 400 and 500 nm;
the polychromatic light source has at least one first emission of nonzero intensity at said wavelength between 400 and 500 nm and at least one second emission at a wavelength of more than 500 nm;
the polychromatic light source is positioned to allow display through said glass-ceramic plate,
the glass-ceramic plate further comprises tin oxide in an amount by weight of between 0.2% and 0.35%,
the glass-ceramic plate further comprises vanadium oxide in a weight content of between 0.01% and 0.03%,
the glass-ceramic plate further comprises As 2 O 3 in a weight content of from 0% to 0.01%,
the glass-ceramic plate further comprises at least one reducing agent,
the glass-ceramic plate further comprises less than or equal to 0.01% by weight of chromium oxide,
the glass-ceramic plate further comprises cobalt oxide in an amount by weight of 0.12% or less,
the glass-ceramic plate comprises no nickel oxide, and
the at least one first emission and the at least one second emission through the glass-ceramic plate allow for display of different colors.

2. The display assembly of claim 1 , wherein an optical transmission of the glass-ceramic plate, for a thickness of 4 mm, is between 0.4% and 1.5% for at least one wavelength between 400 and 500 nm.

3. The display assembly of claim 1 , wherein the glass-ceramic plate comprises antimony oxide and arsenic oxide in amounts not exceeding 0.01% by weight.

4. The display assembly of claim 1 , wherein the glass-ceramic plate comprises less than or equal to 0.1% by weight of manganese oxide.

5. The display assembly of claim 1 , wherein the polychromatic light source is a polychromatic LED.

6. The display assembly of claim 1 , wherein the polychromatic light source is a polychromatic LED which emits with a first emission peak between 430 and 470 nm and a second peak between 540 and 560 nm.

7. The display assembly of claim 6 , wherein the second peak is of lower intensity than the first peak.

8. The display assembly of claim 1 , wherein the polychromatic light source is a polychromatic LED comprising three monochromatic sources, the intensities of which are regulated independently.

9. A hob, comprising the display assembly of claim 1 and a heating element.

10. The display assembly of claim 1 , wherein the glass-ceramic plate comprises antimony oxide and arsenic oxide in amounts not exceeding 0.001% by weight.

11. The display assembly of claim 1 , wherein the glass-ceramic plate contains no antimony oxide and no arsenic oxide.

12. The display assembly of claim 1 , wherein the reducing agent comprises at least one metal sulfide.

13. The display assembly of claim 1 , wherein the reducing agent comprises tin oxide and at least one metal sulfide.

Assignees

• Mulet Jean Philippe
• Charpentier Bertrand
• Vilato Pablo
• Bourgeois Michael
• Eurokera

Inventors

• Mulet Jean-Philippe
• Charpentier Bertrand
• Vilato Pablo
• Bourgeois Michael

Classifications

• C03C10/009 Primary

  having a superconducting crystal phase · CPC title

• F21V3/04 Primary

  characterised by materials, surface treatments or coatings · CPC title

• F21V1/02 Primary

  Frames · CPC title

• C03C4/02

  for coloured glass · CPC title

• C03C10/0027 Primary

  containing SiO2, Al2O3, Li2O as main constituents · CPC title