TextWand |
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by Andrew Campanella and Carlos Vila-Virella |
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Abstract |
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The
TextWand is a wearable glove-mounted display. It consists of a keypad,
an LCD display, and two options for LED output displays. The first
display uses 7 LEDs arranged vertically to form a single column of
dots (a wand), while the second option is to use a scrolling character
LED display.
With the first display scheme, The LEDs are flashed about 16 times per second as the wand is waved back and forth horizontally to sweep out a dot matrix style text message. The apparatus takes advantage of visual memory from the strobed LEDs to spell out a message. The second method is to use a standard 8 or 10 character alphanumeric LED matrix display with a scrolling message. A message is entered via the number keypad using standard cell phone message interface. An LCD screen displays the message while it is being typed and edited before outputting to the LED wand. The LED flash timing is triggered off an accelerometer which senses the rate and speed at which the wand is moved back and forth. This accelerometer compensates for human inconsistency in waving speed for the first display scheme, and triggers the scrolling for the second LED display. |
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