Display device and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-10569501-B2
Application number	US-201715833934-A
Country	US
Kind code	B2
Filing date	Dec 6, 2017
Priority date	Dec 13, 2016
Publication date	Feb 25, 2020
Grant date	Feb 25, 2020

Abstract

A display device includes: a display panel including a display area and a non-display area that extends from an end of the display area and is bent toward the display area; and a passivation film including a first film portion that is attached to a surface of the non-display area and is bent toward the display area, and a second film portion that is attached to a surface of the display area, and a modulus of the first film portion is lower than a modulus of the second film portion.

First claim

What is claimed is:

1. A manufacturing method of a display device, the manufacturing method comprising:
preparing a passivation film including a first film portion and a second film portion on a carrier substrate;
separating the carrier substrate from the passivation film;
attaching a display panel to a surface of the passivation film; and
bending the first film portion and a portion of the display panel,
wherein the first film portion is made of a first material having a modulus that is lower than a modulus of a second material that is different from the first material and of which the second film portion is made,
wherein the display panel includes a display area and a non-display area that extends from an end of the display area and is bent toward the display area,
wherein the passivation film is attached to an entire surface of the display panel and includes the first film portion that is disposed in the non-display area and is bent toward the display area and the second film portion that is flush with both ends of the first film and disposed in an area overlapping with the display area when viewed from a top surface of the display area, and the first film portion is not overlapping with the display area, and
wherein an entire side surface of the second film portion at a junction between the first film portion and the second film portion contacts the first material of the first film portion.

2. The manufacturing method of claim 1 , wherein
the preparing the passivation film including the first film portion and the second film portion on the carrier substrate comprises:
attaching the first film portion on the carrier substrate; and
attaching the second film portion extending from a side of the first film portion on the carrier substrate to prepare the passivation film,
the bending the first film portion and the portion of the display panel comprises:
locally heating the first film portion to bend the first film portion,
wherein the first material is a thermoplastic material, and
wherein the second material is a heat resistant material.

3. The manufacturing method of claim 2 , wherein a glass transition temperature of the first film portion is lower than a glass transition temperature of the second film portion.

4. The manufacturing method of claim 3 , wherein, in the heating of the first film portion, the first film portion is heated to a temperature of equal to or greater than the glass transition temperature of the first film portion and heated to a temperature of less than the glass transition temperature of the second film portion.

5. The manufacturing method of claim 1 , wherein
the preparing the passivation film including the first film portion and the second film portion on the carrier substrate comprises:
attaching the first film portion on the carrier substrate; and
attaching the second film portion extending from a side of the first film portion on the carrier substrate to prepare the passivation film;
the bending the first film portion and the portion of the display panel comprises locally heating the first film portion to bend the first film portion, and
the manufacturing method further comprises forming a neutral surface adjustment member on a surface of the display panel opposite to the surface of the display panel attached to the first film portion.

6. The manufacturing method of claim 1 , wherein
the preparing the passivation film including the first film portion and the second film portion on the carrier substrate comprises:
coating a passivation film resin including a curable material on the carrier substrate;
primarily curing a second film portion of the passivation film resin except for a first film portion of the passivation film resin by disposing a mask blocking the first film portion of the passivation film resin; and
removing the mask and then secondarily curing all of the passivation film resin to prepare the passivation film.

7. The manufacturing method of claim 6 , wherein the mask is a full-tone mask or a half-tone mask.

8. The manufacturing method of claim 6 , wherein
the passivation film resin including the curable material is cured by light or heat, and
in each of the primarily curing and the secondarily curing, light or heat is applied to the passivation film resin.

9. The manufacturing method of claim 1 , wherein
the preparing the passivation film including the first film portion and the second film portion on the carrier substrate comprises:
attaching a material for the first film portion on the carrier substrate; and
forming a plurality of pores in the first film portion of the passivation film.

10. The manufacturing method of claim 9 , further comprising etching the plurality of pores.

11. The manufacturing method of claim 9 , wherein the plurality of pores is formed by a laser process or a punching process.

12. The manufacturing method of claim 9 , further comprising filling a filler having a lower modulus than a modulus of the material for the passivation film in the plurality of pores.

13. A display device comprising:
a display panel including a display area and a non-display area that extends from an end of the display area and is bent toward the display area; and
a passivation film attached to an entire surface of the display panel and including a first film portion that is disposed in the non-display area and is bent toward the display area, and a second film portion that is flush with both ends of the first film and disposed in an area overlapping with the display area when viewed from a top surface of the display area,
wherein the first film portion is made of a first material having a modulus that is lower than a modulus of a second material that is different from the first material and of which the second film portion is made, and the first film portion is not overlapping with the display area, and
wherein an entire side surface of the second film portion at a junction between the first film portion and the second film portion contacts the first material of the first film portion.

14. The display device of claim 13 , wherein
the first material is a thermoplastic material, and
the second material is a heat resistant material.

15. The display device of claim 14 , wherein a glass transition temperature of the first film portion is lower than a glass transition temperature of the second film portion.

16. The display device of claim 13 , wherein
each of the first film portion and the second film portion includes a curable material, and
a concentration of the curable material of the second film portion is higher than a concentration of the curable material of the first film portion.

17. The display device of claim 16 , wherein the first film portion and the second film portion including the curable material are respectively cured by light or heat.

18. The display device of claim 13 , wherein the first film portion is provided with a plurality of pores.

19. The display device of claim 18 , wherein the passivation film has a lower modulus than a modulus of the first film portion, and includes a filler filled in the plurality of pores.

20. The display device of claim 13 , further comprising a neutral surface adjustment member on a surface of the non-display area opposite to the surface of the non-display area attached to the first film portion.

Assignees

• Samsung Display Co Ltd

Inventors

• Lim Jae Ik
• Choi Jin Woo

Classifications

• Y02E10/549

  Organic PV cells · CPC title

• B32B2457/20

  Displays, e.g. liquid crystal displays, plasma displays · CPC title

• B32B5/14

  characterised by a layer differing constitutionally or physically in different parts, e.g. denser near its faces · CPC title

• B32B2307/748

  Releasability · CPC title

• B32B27/06

  as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08)} · CPC title