US 12,422,945 B2
Stylus, touch device, and touch processing circuit
Chih-Yang Ke, Tainan (TW); and Wei-Ren Chang, Tainan (TW)
Assigned to Novatek Microelectronics Corp., Hsinchu (TW)
Filed by Novatek Microelectronics Corp., Hsinchu (TW)
Filed on Dec. 14, 2023, as Appl. No. 18/540,790.
Application 18/540,790 is a continuation in part of application No. 18/178,518, filed on Mar. 5, 2023, abandoned.
Prior Publication US 2024/0295935 A1, Sep. 5, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/041 (2006.01); G06F 3/0354 (2013.01); G06F 3/038 (2013.01); G06F 3/044 (2006.01); H04W 72/23 (2023.01)
CPC G06F 3/04162 (2019.05) [G06F 3/03545 (2013.01); G06F 3/0383 (2013.01); G06F 3/0441 (2019.05); G06F 3/0442 (2019.05); H04W 72/23 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A stylus, comprising:
a holding portion; and
a first transmission electrode, disposed on the holding portion, wherein the first transmission electrode transmits at least one first downlink signal to a touch device, wherein the at least one first downlink signal is used to determine a touch event that the stylus is laid on a touch panel of the touch device, wherein the holding portion has a reference line on a surface of the holding portion, and the touch panel has a reference surface facing to the stylus,
wherein the touch event that the stylus is laid on the touch panel is determined according to a comparison result between strength of only the first downlink signal and a threshold, and
wherein an angle between the reference line and the reference surface is determined from a lookup table only according to the strength of the first downlink signal.