Abstract: The light emitting sheet excellent in light guiding performance according to an embodiment of the present disclosure may include: a base film; and a light guide pattern portion in which a pattern set on a surface of the base film is repeatedly formed, wherein the light guide pattern portion has a hexagonal shape.

Abstract: Provided are a rollable back sheet for a light emitting device and a light emitting device using the same. The rollable back sheet includes a base film and a light guide pattern formed on the base film, and capable of blocking air from flowing into a gap between a release paper and the base film manufactured to have a line printing portion that completely adheres the base film to the release paper, thereby preventing the release paper and the base film from being separated from each other even when the base film is produced, distributed, stored, and used in a roll form and thus enabling long-term storage of the back sheet.