Abstract: A package for packing a bicycle is provided by the present invention. The package includes a base and a cover. The base has two positioning grooves, which are respectively formed at two opposite ends thereof. The base is enclosed by the cover such that a receiving space is formed by the base and the cover. Not only can the package of the present invention protect the bicycle during transportation process, the package can also serve as a bicycle stand, a display stand, or a workstation for installing or repairing the bicycle. As such, the package may provide additional and practical functions other than providing protection during transportation process.

Abstract: An optical film with a plurality of micro structures which are capable of collecting incident light to the frontal and normalized view angle of the optical film for reducing the chance of incident light returning to light guild plate so as to enhance light collecting efficiency is provided in the present invention. In an embodiment, the optical film is combined with a flat light source so as to form a backlight system. By means of the merit of the optical film, the quantities of the optical film can be reduced so that the backlight system can have characteristics of thin thickness and low production cost.