US 12,082,356 B2
Rollable display device
Youngjoon Ahn, Seoul (KR); Jaeyong Kim, Seoul (KR); Changshik Minn, Seoul (KR); and Kwaneun Jin, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/629,969
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Jul. 29, 2019, PCT No. PCT/KR2019/009407
§ 371(c)(1), (2) Date Jan. 25, 2022,
PCT Pub. No. WO2021/020605, PCT Pub. Date Feb. 4, 2021.
Prior Publication US 2022/0346249 A1, Oct. 27, 2022
Int. Cl. H05K 5/02 (2006.01); H05K 5/00 (2006.01)
CPC H05K 5/0217 (2013.01) [H05K 5/0018 (2022.08)] 19 Claims
OG exemplary drawing
 
1. A rollable display device comprising:
a display part including a display panel and a module cover supporting the display panel; and
a roller configured to roll and unroll the display part into and out of a housing,
wherein the module cover includes:
a bonding portion joining the display panel to the module cover; and
elastic bending portions at both ends of the bonding portion of the display part, and bending toward the roller,
wherein when the display part is unrolled from the roller and exposed outside of the housing, the elastic bending portions elastically bend to have a first height,
wherein when the display part is rolled around the roller, and positioned inside the housing, the elastic bending portions elastically bend to have a second height that is less than the first height, and
wherein the module cover further comprises:
a first skin facing the roller;
a second skin facing the display panel; and
a core portion sandwiched between the first skin and the second skin,
wherein the second skin has a buckling stress greater than a buckling stress of the first skin.