Patent ID: 11906847
Assignee: LMS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G | IPC F  G

Claim 0:
1. A backlight unit comprising:
a light source;
a color conversion sheet disposed above the light source for converting a color of light emitted from the light source; and
an optical film disposed over the color conversion sheet, the optical film comprising:
a base film;
a first pattern layer including a first pattern of a plurality of prisms formed on a first surface of the base film and arranged parallelly in a first direction; and
a second pattern layer including a second pattern of a plurality of pyramids including a plurality of rows in a second direction and a plurality of columns in a third direction perpendicular to the second direction and formed on a second surface of the base film,
wherein the second direction is misaligned to the first direction to form an angle in a range of greater than 0° to 45° or less.