Finger activated keyboard for a computer

摘要: A keyboard in which each key includes a light source and photodetector region such as depression panel. The signal is activated by inserting the finger into so to interrupt beam. In one embodiment, depressions are molded plastic surface. another support structure pair of closely spaced parallel panels. An array holes formed detecors sources mounted on second panel that when panels assembled together, detector located with hole providing beam between will be interrupted user inserts his hole. board has pyramidal shape armrests provided reduce repetitve motion stress. further modification, computer ball can moved at same time varioosu combinations keys depressed perform selected number operations measuring length line, coloring an enclosure, etc.