Abstract: A display device and a manufacturing method thereof are provided. The display device includes a light guide, a light source, and a brightness enhancement film (BEF), and a dual brightness enhancement film (DBEF). The light guide has a first edge along a first direction and a second edge adjacent to the first edge corresponding to the light source. The BEF is disposed on the light guide and has a plurality of prisms along a second direction which rotates from 0 to 90 degrees with respect to the first direction. The DBEF has a transmission axis along a third direction which also rotates from 0 to 90 degrees with respect to the first direction.

Abstract: An illumination device and a manufacture method thereof are provided. The illumination device includes a base, an illumination chip, and a sealant. The base has a surrounding side wall which encloses a containing space. The illumination chip is disposed within the containing space while the sealant fills the containing space and covers the illumination chip. The sealant has an outer surface which includes a center concave and a circular convex surrounding the center concave. The center concave is formed as a part of a spherical surface with no singular point. The connection between the center concave and the circular convex forms a circular ridge.

Abstract: A display device and a manufacturing method thereof are provided. The display device includes a light guide, a light source, and a brightness enhancement film (BEF), and a dual brightness enhancement film (DBEF). The light guide has a first edge along a first direction and a second edge adjacent to the first edge corresponding to the light source. The BEF is disposed on the light guide and has a plurality of prisms along a second direction which rotates from 0 to 90 degrees with respect to the first direction. The DBEF has a transmission axis along a third direction which also rotates from 0 to 90 degrees with respect to the first direction.