STYLUS PEN AND TOUCH INPUT SYSTEM USING THE SAME AND METHOD FOR DETECTING TOUCH

摘要

The present invention relates to a stylus pen and a touch input system and a touch detection method using the same without using a battery-free stylus pen and a finger to distinguish and detect a touch while improving the writing pressure detection efficiency and performance of the stylus pen. A sensor panel having a plurality of first and second channels crossing each other; A stylus pen including a plurality of primary coils connected in series with each other, a resonant capacitor connected in parallel with the primary coil, and a conductive tip connected with the primary coil; A ground part connected to the stylus pen; An antenna loop formed outside the sensor panel; And a touch controller connected to the first channel and the second channel and the antenna loop.