Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad
Patent
1992-08-12
1995-12-19
Peng, John K.
Coded data generation or conversion
Bodily actuated code generator
Including keyboard or keypad
341 22, 345170, 250221, H03K 17968
Patent
active
054772230
ABSTRACT:
A keyboard in which each key includes a light source and photodetector in a region such as a depression in a panel. The key signal is activated by inserting the finger into the depression so as to interrupt the beam. In one embodiment, the depressions are molded into a plastic surface. In another embodiment, the key support structure is a pair of closely spaced parallel panels. An array of key holes are formed in in one panel. An array of detecors and light sources is mounted on the second panel such that when the panels are assembled together, a light source detector pair is located with each key hole providing that the beam between the light source and photodetector will be interrupted when the user inserts his finger in the hole. In another embodiment, the key board has a pyramidal shape and armrests are provided to reduce repetitve motion stress. In a further modification, the pyramidal keyboard is provided with a computer ball so that the ball can be moved at the same time that varioosu combinations of keys are depressed to perform a selected one of a number of operations such as measuring the length of a line, coloring in an enclosure, etc.
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IBM Technical Disclosure Bulletin, vol. 27, No. 10B, Mar. 1985, "Mouse/Keyboard Concept Incorporating Unique Devices for Controlling CRT display cursors".
Peng John K.
Smith Robert S.
Wu Daniel J.
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