METHOD FOR SEARCHING POSITION OF FINGER BASED ON VOLTAGE CHANGE APPLIED TO INFRARED SENSOR USING TIME DIFFERENCE ON VIRTUAL KEYBOARD

摘要

PURPOSE: A method for searching a position of a finger based on voltage change applied to an infrared sensor using a time difference on a virtual keyboard is provided to search the position of the finger by detecting an initial voltage value detected from a light receiver, as the voltage divided into each predetermined time is applied to the infrared sensor from a small value to a large value. CONSTITUTION: As a size of the voltage applied to the information sensor(2) is applied by dividing it into each predetermined time with a processor(3), the change of a detection area is changed. The position of the finger(4) is understood by detecting an initially detected voltage size. As the information for the position is transferred to the keyboard controller by the processor, operation of the keyboard is performed.