Buffer film
AssigneeLG Chem, Ltd.
InventorsChoong Man Bae, Dong Woo Yoo, Cheol Hee Lee, Jin Kyu Lee
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Abstract
A buffer film and an organic light emitting device (OLED) including the same are disclosed herein. In some embodiments, a buffer film comprises a porous metal sheet having average reflectance of 50% or less for light in a wavelength range of 400 to 800 nm. The buffer film can exhibit heat dissipation properties, electromagnetic wave shielding properties and impact resistance (or impact mitigation properties) required for an OLED. The buffer film is capable of securing the characteristics required for an OLED without price increase, process complexity, and thickness increase of the OLED.
Claims14
A buffer film, comprising:
- a porous metal sheet,
- wherein the porous metal sheet has an average reflectance of 50% or less with respect to light having wavelength ranging from 400 nm to 800 nm,
- wherein the porous metal sheet has a first major surface and a second major surface having different a surface roughnesses than the first major surface, and
- wherein a ratio a surface roughness (1Sa) of the first major surface relative to a surface roughness (2Sa) of the second major surface is 1.1 or more to 3 or less.
Dependencies are inferred from the claim text.