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US 2023/0272175 A1Published application
Composite film and display device comprising same
AssigneeSkc Hi-Tech & Marketing Co., Ltd.
InventorsJun-Ki PARK, Seok-Jong WOO, Hyung-Woo CHO, Seung-Yong PYUN
Life of this patent
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Abstract
In the composite film according to the embodiment, an elastic layer in which its modulus change characteristics with respect to temperature have been adjusted to a certain range is coated onto the opposite side to a hard coating layer; thus, it is possible to enhance the surface hardness and elastic recovery characteristics of the hard coating layer. Thus, it can be advantageously applied as a cover window of a flexible display device.
Claims10
A composite film, which comprises a base film;
- a hard coating layer disposed on one side of the base film;
- and an elastic layer disposed on the other side of the base film,
- wherein the ΔE′ value according to the following Equation (1) is 300 or less:
- ΔE′=E′[−30° C.]/E′[50° C.] (1)
- in which E′[−30° C.] is the storage modulus (Pa) of the elastic layer at −30° C., and E′[50° C.] is the storage modulus (Pa) of the elastic layer at 50° C.
2 more elements
A display device, which comprises a display panel;
- and a cover window disposed on the front side of the display panel,
- wherein the cover window comprises a base film;
- a hard coating layer disposed on one side of the base film;
- and an elastic layer disposed on the other side of the base film, and
- wherein the ΔE′ value according to the following Equation (1) is 300 or less:
- ΔE′=E′[−30° C.]/E′[50° C.] (1)
- in which E′[−30° C.] is the storage modulus (Pa) of the elastic layer at −30° C., and E′[50° C.] is the storage modulus (Pa) of the elastic layer at 50° C.
4 more elements
Dependencies are inferred from the claim text.