PORTABLE TERMINAL HAVING INPUTTING MEANS USING IMAGE SENSOR
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United States of America Patent
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Issued Date -
Aug 13, 2009
app pub date -
Oct 14, 2005
filing date -
Oct 22, 2004
priority date (Note) -
Abandoned
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Abstract
The present invention is directed to a portable terminal having inputting means using an image sensor and its input method. The portable terminal according to an embodiment of the present invention comprises a transparent solid plate mounted in a keypad area; an image sensor having unit cells of lattice type outputting an electrical signal corresponding to the light irradiated through the transparent solid plate; and a key selection recognizer generating and outputting a key button selection signal corresponding to the location of a unit cell that outputted the least electrical signal value by making reference to the size of the value of the electrical signal inputted from the unit cells. The present invention enables compacting of portable terminals owing to eliminating the need to design key buttons to match the size of human fingers.
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