公开(公告)号：US20240393853A1

公开(公告)日：2024-11-28

申请号：US18272895

申请日：2022-12-26

Applicant: Honor Device Co., Ltd.

Inventor： Youjun Zhang ,  Yulei Wen

IPC: G06F1/26 ,  G06F1/16 ,  G06F3/0354 ,  H02J7/00 ,  H02J50/10

Abstract: A terminal device includes: a tablet and a keyboard. The tablet includes: a first controller, a first charging port, and a battery. The keyboard includes: a second controller and a second charging port; and the keyboard includes no battery. The first controller communicates with the second controller through data lines in 3pin. When the first charging port is connected to a first external power supply, and the second charging port is connected to a second external power supply, when a charging power of the first charging port is greater than a charging power of the second charging port, the first charging port is selected to charge the tablet and power is supplied to the keyboard through a power line in the 3pin; otherwise, the second charging port is selected to supply power to the keyboard and the tablet is charged through a power line in the 3pin.

公开(公告)号：US20250038583A1

公开(公告)日：2025-01-30

申请号：US18546022

申请日：2022-12-26

Applicant: Honor Device Co., Ltd.

Inventor： Youjun Zhang ,  Yuan Wu ,  Wujia Zhang ,  Yulei Wen ,  Jie Hu

IPC: H02J50/90 ,  G01D5/24 ,  G06F3/0354 ,  H02J50/10

Abstract: This application provides an electronic device and a stylus in-position determining method. The electronic device includes: an inverter circuit. When a Q value of the transmit coil is detected, the controller controls the resonant capacitor adjustment circuit to operate; the Q value detection circuit is configured to obtain a voltage signal representing a Q value; and the controller obtains the Q value based on the voltage signal, and when the Q value is greater than a preset threshold, determines that a stylus is attached to the electronic device. The resonant capacitor adjustment circuit participates in operation during Q value detection.