Granted Patent B2

US 12,628,286 · App. 18/200,826 · Granted May 12, 2026

Inventor: Geunwoo Yug (Yongin-si, KR)

Assignee: SAMSUNG DISPLAY CO., LTD.

H05K5/02

Abstract

Claims (60)

1 . A foldable display device comprising:

a display panel including a foldable area which is folded based on a folding axis; and

a supporting member disposed under the display panel and including:

a folding portion which corresponds to the foldable area of the display panel and in which a plurality of through-holes is defined, the folding portion comprising:

a first region including an edge portion in contact with an end portion of the supporting member; and

a second region positioned adjacent to the first region in a folding axis direction; and

a fiber reinforced plastic,

wherein

each of the plurality of through-holes includes an affected zone which is disposed at a boundary of a through-hole of the plurality of through-holes and in which a physical or chemical change has occurred at one surface of the supporting member,

a width of the affected zone of through-holes of the plurality of through-holes disposed in the first region is different from a width of the affected zone of through-holes of the plurality of through-holes disposed in the second region, and

the folding portion further includes a third region adjacent to the second region in the folding axis direction, and the width of the affected zone of the through-holes disposed in the third region is different from the width of the affected zone of the through-holes disposed in the second region.

2 . The foldable display device of claim 1 , wherein

the width of the affected zone of the through-hole disposed in the first region is within about 10 micrometers from an incision surface of the through-hole.

3 . The foldable display device of claim 1 , wherein

the plurality of through-holes is disposed consecutively and extended in the folding axis direction.

4 . The foldable display device of claim 3 , wherein

the plurality of through-holes has a first width in the folding axis direction and a second width in a direction intersecting the folding axis direction, and the first width is wider than the second width.

5 . The foldable display device of claim 4 , wherein

the plurality of through-holes is in a form of which a half circle is tangential to opposite ends of a rectangle.

6 . The foldable display device of claim 1 , wherein

the fiber reinforced plastic includes at least one of carbon fiber reinforced plastic, glass fiber reinforced plastic, graphite fiber reinforced plastic, aramid fiber reinforced plastic, and hybrid carbon fiber reinforced plastic.

7 . A foldable display device comprising:

a display panel including a foldable area which is folded based on a folding axis; and

a supporting member disposed under the display panel and including:

a folding portion which corresponds to the foldable area of the display panel and in which a plurality of through-holes defined by a laser, the folding portion including:

a first region including an edge portion in contact with an end portion of the supporting member; and

a second region disposed adjacent to the first region in a folding axis direction; and

a fiber reinforced plastic,

wherein

through-holes of the plurality of through-holes disposed in the first region and through-holes of the plurality of through-holes disposed in the second region are processed by lasers of different pulse energy, and

the through-holes disposed in the first region are processed with a laser of a first pulse energy, and the through-holes disposed in the second region are processed with a laser of a second pulse energy, which is a higher energy than the first pulse energy.

8 . The foldable display device of claim 7 , wherein

a number of laser scans of the first pulse energy in the first region is different from a number of laser scans of the second pulse energy in the second region.

9 . The foldable display device of claim 7 , wherein

the folding portion further includes a third region adjacent to the second region in the folding axis direction,

the through-holes disposed in the first region are processed by a laser of a first pulse energy, the through-holes disposed in the second region are processed by a laser of a second pulse energy, which is higher energy than the first pulse energy, and the through-holes disposed in the third region are processed with a laser of a third pulse energy, which is a higher energy than the second pulse energy.

10 . The foldable display device of claim 9 , wherein

a number of laser scans of the first pulse energy in the first region is greater than a number of laser scans of the second pulse energy in the second region, and a number of laser scans of the third pulse energy in the third region is smaller than the number of laser scans of the second pulse energy in the second region.

11 . The foldable display device of claim 7 , wherein

the fiber reinforced plastic includes at least one of carbon fiber reinforced plastic, glass fiber reinforced plastic, graphite fiber reinforced plastic, aramid fiber reinforced plastic, and hybrid carbon fiber reinforced plastic.

12 . A supporting member comprising:

a folding portion which is folded based on a folding axis and in which a plurality of through-holes is defined by laser processing, the folding portion including:

a first region including an edge portion in contact with an end portion of the supporting member; and

a second region disposed adjacent to the first region in a folding axis direction, and

a fiber reinforced plastic,

wherein

each of the plurality of through-holes includes an affected zone which is disposed at a boundary of a through-hole of the plurality of through-holes and

in which a physical or chemical change has occurred at one surface of the supporting member,

a width of the affected zone of through-holes of the plurality of through-holes disposed in the first region is different from a width of the affected zone of through-holes of the plurality of through-holes disposed in the second region, and

the through-holes disposed in the first region are processed by a laser of a first pulse energy, and the through-holes disposed in the second region are processed by a laser of a second pulse energy different from the first pulse energy.

13 . The supporting member of claim 12 , wherein

the folding portion further includes a third region adjacent to the second region in the folding axis direction, and a width of the affected zone of the through-holes disposed in the third region is different from the width of the affected zone of the through-holes disposed in the second region.

14 . The supporting member of claim 12 , wherein

the width of the affected zone of the through-holes disposed in the first region is within about 10 micrometers from an incision surface of the through-holes.

15 . The supporting member of claim 12 , wherein

the plurality of through-holes is formed consecutively and extended in the folding axis direction.

16 . The supporting member of claim 12 , wherein

the fiber reinforced plastic includes at least one of carbon fiber reinforced plastic, glass fiber reinforced plastic, graphite fiber reinforced plastic, aramid fiber reinforced plastic, and hybrid carbon fiber reinforced plastic.

17 . The supporting member of claim 12 , wherein

a number of laser scans of the first pulse energy in the first region is different from a number of laser scans of the second pulse energy in the second region.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (26)