Flexible display device and upper film therefor
AssigneeSamsung Display Co., Ltd.
InventorsSeung Hwan Chung, Hung Kun Ahn, Seokwon Jang, Danbi Myung
Life of this patent
Estimating the term…
Abstract
The disclosure relates to a flexible display device including: a display panel including a touch sensor, where the display panel is foldable with respect to a folding axis; a cover window disposed on a front surface of the display panel; and a front surface film disposed on a front surface of the cover window, where the front surface film includes a protection film, and a base film having a transverse direction, and the transverse direction is perpendicular to a direction of the folding axis.
Claims20
A flexible display device comprising:
- a display panel including a touch sensor, wherein the display panel is foldable with respect to a folding axis;
- a cover window disposed on a front surface of the display panel;
- and
- a front surface film disposed on a front surface of the cover window,
- wherein the front surface film includes:
- a protection film;
- and
- a base film which is a biaxially elongated film having elongating directions including a transverse direction and a machine direction perpendicular to the transverse dirction,
- wherein a value of a modulus of the base film in the transverse direction is greater than a value thereof in the machine direciton, and
- wherin the transverse direction is perpendicular to a direction of the folding axis.
An upper film for a flexible display device comprising:
- a protection film including a polyurethane;
- and
- a base film which is biaxially elongated film having elongating directions including a transverse direction and a machine direction perpendicular to the transverse direction,
- wherein a value of a modulus of the base film in the transverse direction is greater than a value thereof in the machine direction, and
- wherien a thickness of the protection film is equal to or greater than about 20 μm and equal to or less than about 80% of a thickness of the base film.
Dependencies are inferred from the claim text.