| 摘要 |
A keyboard system permits inputting of data where an input source is responsive to the non-physical touch of fingers. A software program coordinates and interpreting the output signal into discrete letters and other symbols commonly found on a keyboard. A wireless connection can be used, and trigonometrical measurements facilitate location in relation to fingers of a typist. A triangulation device senses finger movement displayed on a monitor, which selectively represents the keyboard. The keyboard allows a typist to be mobile while inputting data into a computer processor.
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