Substrate for curved display device and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2016204133-A1
Application number	US-201514805233-A
Country	US
Kind code	A1
Filing date	Jul 21, 2015
Priority date	Jan 8, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

Disclosed is a substrate for a curved display device, including: an alkali-free glass substrate that does not contain an alkali metal oxide; and an inorganic coating part formed on at least one of a display surface and a lateral surface of the alkali-free glass substrate, and having a larger value of a coefficient of thermal expansion than that of the glass substrate.

First claim

What is claimed is:

1 . A substrate for a curved display device, comprising:
an alkali-free glass substrate that does not contain an alkali metal oxide; and an inorganic coating part formed on at least one of a display surface and a lateral surface of the alkali-free glass substrate, and having a larger value of a coefficient of thermal expansion than that of the glass substrate.

2 . The substrate of claim 1 , wherein:
a value of a coefficient of thermal expansion of the alkali-free glass substrate is 40×10 −7 /° C. or lower.

3 . The substrate of claim 1 , wherein:
a difference in values of the coefficient of thermal expansion between the alkali-free glass substrate and the inorganic coating part is less than 40×10 −7 /° C.

4 . The substrate of claim 1 , wherein:
the inorganic coating part includes a metal, glass, or a combination thereof.

5 . The substrate of claim 4 , wherein:
the inorganic coating part is formed by sintering frit.

6 . The substrate of claim 5 , wherein:
the inorganic coating part is formed at an edge portion of the alkali-free glass substrate.

7 . The substrate of claim 6 , wherein:
the inorganic coating part is locally formed at the edge portion of the alkali-free glass substrate.

8 . A method of manufacturing a substrate for a curved display device, the method comprising:
applying an inorganic paste onto at least one of a display surface and a lateral surface of an alkali-free glass substrate that does not contain an alkali metal oxide; and sintering the inorganic paste, wherein the inorganic paste contains a component having a larger value of a coefficient of thermal expansion than that of the alkali-free glass substrate.

9 . The method of claim 8 , wherein:
the inorganic paste is applied onto an edge portion of the alkali-free glass substrate.

10 . The method of claim 9 , wherein:
the inorganic paste is locally applied onto the edge portion of the alkali-free glass substrate.

11 . The method of claim 8 , wherein:
the sintering is performed by using a laser heat source.

12 . The method of claim 8 , wherein:
a value of the coefficient of thermal expansion of the alkali-free glass substrate is 40×10 −7 /° C. or lower.

13 . The method of claim 8 , wherein:
the inorganic paste contains frit.

14 . A method of cutting a substrate for a curved display device, the method comprising:
applying an inorganic paste onto a part of a surface of an alkali-free glass substrate that does not contain an alkali metal oxide; sintering the inorganic paste to form sintered inorganic paste; and cutting the alkali-free glass substrate along a portion at which the sintered inorganic paste is formed.

15 . The method of claim 14 , wherein:
the inorganic paste contains frit.

16 . A curved display device, comprising:
a substrate for the curved display device; a thin film transistor positioned on the substrate for the curved display device; and a pixel electrode connected to the thin film transistor, wherein the substrate for a curved display device comprising, an alkali-free glass substrate that does not contain an alkali metal oxide; and an inorganic coating part formed on at least one of a display surface and a lateral surface of the alkali-free glass substrate, and having a larger value of a coefficient of thermal expansion than that of the glass substrate.

17 . The curved display device of claim 16 , further comprising:
a common electrode facing the pixel electrode; and a light emission layer interposed between the pixel electrode and the common electrode.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Seung
• Kim Seung Ho
• Park Jeong Woo
• Ahn Sang Hoon
• Yeum Jong Hoon
• Lee Hoi Kwan
• Cho Joo Woan

Classifications

• C03B33/091

  using at least one focussed radiation beam, e.g. laser beam (C03B33/0955 takes precedence) · CPC title

• C03C8/14

  Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions · CPC title

• Y02E10/549

  Organic PV cells · CPC title

• C03B33/074

  Glass products comprising an outer layer or surface coating of non-glass material · CPC title

• C03C2218/32

  After-treatment · CPC title