A method of implementing touch pad using fingerprint reader and a touch pad apparatus for functioning as fingerprint scan

摘要

The present invention relates to a method and a touchpad device for realizing a touchpad by detecting a finger position and detecting a click in addition to a function of scanning a fingerprint of a finger by using a conventional TFT-type fingerprint input device. The present invention has a structure in which a plurality of unit cells composed of a sensor TFT and a switching TFT are arranged, and a TFT fingerprint input device (hereinafter, referred to as a fingerprint input device) for scanning a fingerprint image and positioned below it to irradiate light to pass through the fingerprint input device. It consists of a backlight, and in the fingerprint recognition mode, it scans the fingerprint to recognize the fingerprint image based on the original function of the fingerprint input device.In the touchpad mode, the output value of each unit cell with respect to the position of the finger is measured on the x axis and the y axis. Projection conversion to determine the position of the finger.