Abstract: A thin keymat module with a reflection structure includes a circuit board with a plurality of elastic conductive elements, a mirror reflection sheet, a transparent elastic layer, a keymat layer and a light-emitting unit. The mirror reflection sheet is disposed on the circuit board, evenly corresponding to the elastic conductive elements. The mirror reflection sheet has a reflection microstructure corresponding to the elastic conductive elements. The transparent elastic layer is disposed on the mirror reflection sheet and has elastic portions corresponding to the elastic conductive elements. The keymat layer is disposed on the transparent elastic layer and has transparent portions corresponding to the elastic portions. The light-emitting unit is located on one side of the transparent elastic layer. When the light-emitting unit projects light onto the mirror reflection sheet and the reflection microstructure, each elastic portion and each transparent portion have a light displaying effect.

Abstract: A keypad with increased refractive index includes a light-guiding elastic element, an optical refractive layer and at least one light-emitting element. The optical refractive layer is applied on an upper surface of the light-guiding elastic element. The light-emitting element is provided on one side of the light-guiding elastic element. The refractive index of air is defined as a real number x. The refractive index of the light-guiding elastic element is defined as a real number y. The refractive index of the optical refractive layer is defined as a real number z. The refractive index z is larger than the refractive index x. Since the optical refractive layer is applied on the light-guiding elastic element and the refractive index of the optical refractive layer is different from that of the light-guiding elastic element, the angle of total reflection of the light in the light-guiding elastic element can be changed.

Abstract: A light-guiding key structure with lateral light-guiding function includes: at least one key module, a light-guiding element, and at least one light-emitting element. The at least one key module can be a key body or a key display. The light-guiding element is disposed over the at least one key module. The at least one light-emitting element is disposed beside one side of the light-guiding element. Therefore, when the at least one light-emitting element projects a light source to the light-guiding element, the light source is guided via the light-guiding element onto the at least one key module to illuminate the image on the at least one key module for user to watch the image.

Abstract: An optical film delivery unit is comprised of an optical film strip having optical films protected by at least one liner. Scores, typically dot-line cuts, in the liners initiate folding. The optical film strip is folded along the scores such that the optical film delivery unit assumes a Z-fold structure that provides several advantages. There is no tension on the strip. The optical films do not create impressions on each other and remain flat. In addition, the optical film unit is relatively small making it more efficient to package and transport.

Abstract: A method for distributing electronic files over a network comprising a file combination procedure, a combined electronic file providing procedure, a payment receiving procedure and a main electronic file providing procedure. The file combination procedure combines a main electronic file and an accompanying electronic file into a combined electronic file. The combined electronic file providing procedure provides the combined electronic file to a user before the payment receiving procedure. The payment receiving procedure is a payment procedure that receives the payment from the user for the purchase of the main electronic file. The main electronic file providing procedure provides the user the main electronic file and adds in the main electronic file a watermark for identifying the user. The invention also discloses a corresponding system of distributing electronic files over a network.