US 11,899,879 B2
Stylus detection method, system, and related apparatus for switching frequencies for detecting input signals
Honglei Luo, Shanghai (CN); Junyong Zhang, Dongguan (CN); Weihuan Li, Shanghai (CN); and Yejian Xu, Shanghai (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Appl. No. 17/281,187
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
PCT Filed Sep. 30, 2018, PCT No. PCT/CN2018/109226
§ 371(c)(1), (2) Date Mar. 29, 2021,
PCT Pub. No. WO2020/062310, PCT Pub. Date Apr. 2, 2020.
Prior Publication US 2021/0397342 A1, Dec. 23, 2021
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01); G06F 1/3234 (2019.01); G06F 3/0354 (2013.01); G06F 3/0488 (2022.01)
CPC G06F 3/041662 (2019.05) [G06F 1/3262 (2013.01); G06F 3/03545 (2013.01); G06F 3/0442 (2019.05); G06F 3/0488 (2013.01); G06F 2203/04106 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A stylus detection method implemented by a terminal, wherein the method comprises:
detecting for an input signal of a stylus at a first frequency;
receiving a first input of the stylus through a touchscreen of the terminal;
switching, in response to the first input, to detecting for the input signal at a second frequency;
switching to detecting for the input signal at a third frequency when a first duration during which the terminal does not detect the input signal while detecting for the input signal at the second frequency is greater than a first time period, wherein the second frequency is greater than the third frequency, and wherein the third frequency is greater than the first frequency;
receiving a second input of a user while detecting for the input signal at the second frequency;
turning off, in response to the second input, the touchscreen; and
switching, in response to the second input, to detecting for the input signal at the first frequency.