US 9,811,120 B2
Flexible display device
Jun Namkung, Asan-si (KR); Soonryong Park, Sejong (KR); and Chulwoo Jeong, Hwaseong-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si, Gyeonggi-do (KR)
Filed on Oct. 26, 2016, as Appl. No. 15/335,061.
Application 15/335,061 is a continuation in part of application No. 14/298,792, filed on Jun. 6, 2014, granted, now 9,485,858.
Claims priority of application No. 10-2013-0146426 (KR), filed on Nov. 28, 2013.
Prior Publication US 2017/0045914 A1, Feb. 16, 2017
Int. Cl. G02F 1/1333 (2006.01); H05K 1/02 (2006.01); G06F 1/16 (2006.01); H01L 27/32 (2006.01)
CPC G06F 1/1652 (2013.01) [G02F 1/133305 (2013.01); H05K 1/028 (2013.01); H01L 27/3244 (2013.01); H01L 2251/5338 (2013.01); H05K 2201/055 (2013.01); H05K 2201/09036 (2013.01); H05K 2201/09845 (2013.01); H05K 2201/10106 (2013.01); H05K 2201/10128 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A flexible display device comprising:
a flexible display panel comprising a folding area and a peripheral area; and
a first outer member on a surface of the flexible display panel and comprising a first groove pattern extending in a first direction at the folding area,
wherein the first groove pattern comprises:
a first inclined portion having a first surface inclined to the surface of the display panel; and
a second inclined portion spaced apart from the first inclined portion in a second direction crossing the first direction, the second inclined portion having a second surface inclined to the surface of the display panel,
wherein a width of the first groove pattern satisfies the Formula
W=F+(S1+S2)=π×R
and
wherein W denotes the width of the first groove pattern, F denotes a distance between the first inclined portion and the second inclined portion in the second direction, S1 denotes a width of the first inclined portion in the second direction, S2 denotes a width of the second inclined portion in the second direction, π denotes a circular constant, and R denotes a radius of curvature of the flexible display panel at the folding area.