Plate Glass Keyboard
Original Publication Date: 1989-May-01
Included in the Prior Art Database: 2005-Jan-27
Disclosed is a keyboard which can be activated through a barrier, such as a plate glass window, by the user's finger or other mechanism in order to control a computing mechanism located behind the window. The concept extends to other input capabilities through a barrier, such as a bar code reader or symbol recognizer. Reflected light is used as the input. This allows the keyboard to be behind a glass plate. (Image Omitted) Fig. 1 shows a flat keyboard 1 that uses reflected light of a known frequency range as input. The key locations and nomenclature are similar to standard keyboards. This flat keyboard sits against a glass plate 2 which is encased in a protective cover 3. This cover keeps the computer unit and user environmentally separated. Fig. 2 shows a detail of a particular key.