Flat input-keyboard for use in form of membrane keyboard, has front film for forming keypad, light guiding film and light source for coupling light in light guiding film, where light guiding film has slot

摘要

The flat input-keyboard has a front film (10) for forming a keypad (12), a light guiding film (14) and a light source (24) for coupling the light in the light guiding film, where the light guiding film has a slot (28). The slot defines a tongue (26) in a frame (30) surrounding the tongue. The tongue is arranged in the area of the keypad. The tongue has a light outcoming structure (34) for outcoming the light inputted in the light guiding film through the light source. An independent claim is included for a method for manufacturing a light guiding film.