US 12,307,027 B2
Stylus control circuit and stylus
Hao-Wei Cheng, Tainan (TW); and Chin-Lin Lee, Hsinchu (TW)
Assigned to NOVATEK Microelectronics Corp., Hsin-Chu (TW)
Filed by NOVATEK Microelectronics Corp., Hsin-Chu (TW)
Filed on Sep. 23, 2023, as Appl. No. 18/372,064.
Application 18/372,064 is a division of application No. 18/098,122, filed on Jan. 18, 2023.
Claims priority of provisional application 63/303,510, filed on Jan. 27, 2022.
Prior Publication US 2024/0012493 A1, Jan. 11, 2024
Int. Cl. G06F 3/0354 (2013.01)
CPC G06F 3/03545 (2013.01) 8 Claims
OG exemplary drawing
 
1. A stylus to interact with a plurality of positioning transmission electrodes, the stylus comprising:
a receiver to receive an uplink signal carrying a plurality of positioning signals which are transmitted from the plurality of positioning transmission electrodes;
a demodulation circuit, coupled to the receiver, to demodulate the uplink signal to generate at least one positioning signal among the plurality of positioning signals; and
a signal processing circuit to determine a position of the stylus according to the at least one positioning signal;
wherein the stylus is used to receive the plurality of positioning signals in a plurality of consecutive frame periods, and the signal processing circuit is configured to determine a trajectory of the stylus according to the plurality of positioning signals received in the plurality of consecutive frame periods.