Patent ID: 8770772

Claim:
A luminous keyboard, comprising: a press key unit including a plurality of press keys; and a backlight module disposed under said press key unit and including a light guiding plate, a plurality of light guiding points which are formed on a bottom surface of said light guiding plate and corresponding in position to said press keys, an upper light-permeable thin film disposed on a top surface of said light guiding plate, a lower light-permeable thin film that is disposed on said bottom surface, that is opposite to said upper light-permeable thin film and that covers said light guiding points, and a luminous element from which light beams are incident to said light guiding plate; wherein said upper and lower light-permeable thin films respectively have refractive indices lower than that of said light guiding plate so that a total internal reflection of the light beams occurs between said upper and lower light-permeable thin films, and said light guiding points scatter and direct the light beams to pass through said upper light-permeable thin film and to illuminate said press keys.