Stacked transparent film and window for display device and display device
AssigneeSamsung Electronics Co., Ltd.
InventorsSun Jin Song, Sang Soo Jee, Boreum Jeong, Hyunjeong Jeon, Chanjae Ahn
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Abstract
A stacked transparent film includes a polymer film including at least one of an amide structural unit and an imide structural unit, wherein the polymer film has a refractive index of about 1.65 to about 1.75 at a 550 nanometer wavelength and an elastic modulus of greater than or equal to about 5.5 gigapascals; and at least one of a first coating layer on a first side of the polymer film and a second coating layer on a side opposite the first side of the polymer film.
Claims23
A stacked transparent film comprising
- a polyamide-polyimide polymer film comprising an amide structural unit and an imide structural unit, wherein the polymer film has a refractive index of about 1.65 to about 1.75 at a 550 nanometer wavelength and an elastic modulus of greater than or equal to about 5.5 gigapascals;
- and
- at least one of a first coating layer on a first side of the polymer film and a second coating layer on a side opposite the first side of the polymer film,
- wherein the polyamide-imide polymer film is obtained by
- preparing an amide group-containing oligomer by reacting a dicarboxylic acid compound and a diamine compound;
- and
- reacting an anhydride and the amide group-containing oligomer.
An amide-imide copolymer film having a thickness of about 20 micrometers to about 100 micrometers, a refractive index of about 1.65 to about 1.75 at a 550 nanometer wavelength, and an elastic modulus of greater than or equal to about 5.5 gigapascals,
- wherein the amide-imide copolymer film is obtained by
- preparing an amide group-containing oligomer by reacting a dicarboxylic acid compound and a diamine compound;
- and
- reacting an anhydride and the amide group-containing oligomer.
Dependencies are inferred from the claim text.