OPTICAL TOUCHPAD APPARATUS WITH PROXIMITY AND FORCE SENSING CAPABILITIES AND METHOD OF SENSING TOUCH IN APPARATUS

摘要

An embodiment of the present invention relates to an optical touch pad device detecting proximity and pressure and a method of detecting a touch on the touch pad device. The provided optical touch pad device includes: a light emission unit discharging signals continuously; an elastic sheet which provides a surface an object touches or approaches and also provides a signal transmission path; a first light reception unit which detects a signal reflected from the object when the object approaches or presses the elastic sheet; and a second light reception unit which detects a signal guided to the side surface of the elastic sheet when the object approaches or presses the elastic sheet.