US 12,487,684 B2
Signal transmission between electronic device and keyboard using high/low pass filters
Lei Ma, Shenzhen (CN); Bo Ma, Shenzhen (CN); Chengyu Ma, Shenzhen (CN); Yingke Fu, Shenzhen (CN); and Chao Wang, Shenzhen (CN)
Assigned to Honor Device Co., Ltd., Shenzhen (CN)
Appl. No. 18/689,639
Filed by Honor Device Co., Ltd., Shenzhen (CN)
PCT Filed Sep. 8, 2023, PCT No. PCT/CN2023/117670
§ 371(c)(1), (2) Date Mar. 6, 2024,
PCT Pub. No. WO2024/061023, PCT Pub. Date Mar. 28, 2024.
Claims priority of application No. 202211161307.0 (CN), filed on Sep. 23, 2022.
Prior Publication US 2025/0123694 A1, Apr. 17, 2025
Int. Cl. G06F 3/023 (2006.01); G06F 3/02 (2006.01); H01H 13/81 (2006.01)
CPC G06F 3/023 (2013.01) [G06F 3/0213 (2013.01); H01H 13/81 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A signal transmission method, applied to an electronic device in which a first low-pass filter, a second low-pass filter, a first high-pass filter, a second high-pass filter, a first contact point, and a second contact point are disposed, wherein each of the first low-pass filter and the first high-pass filter is connected to the first contact point, each of the second low-pass filter and the second high-pass filter is connected to the second contact point, the second contact point is configured to be in contact with a third contact point on a keyboard, the first contact point is configured to be in contact with a fourth contact point on the keyboard, and the method comprises:
transmitting, by the electronic device, a power signal to the first contact point through the first low-pass filter, and transmitting a GND signal to the second contact point through the second low-pass filter;
sending, by the electronic device, first information processed by the first high-pass filter to the keyboard through the first contact point; or sending, by the electronic device, first information processed by the second high-pass filter to the keyboard through the second contact point, wherein the first information is used to request the keyboard to establish a communication connection;
receiving, by the electronic device through the first contact point, second information sent by the keyboard, and processing the second information through the first high-pass filter; or receiving, by the electronic device, the second information through the second contact point, and processing the second information through the second high-pass filter, wherein the second information is used to indicate that the keyboard establishes a communication connection to the electronic device; and
receiving, by the electronic device, key position information transmitted by the keyboard to the first contact point, and processing, through the first high-pass filter, the key position information transmitted to the first contact point; receiving, by the electronic device, key position information transmitted by the keyboard to the second contact point, and processing, through the second high-pass filter, the key position information transmitted to the second contact point; or receiving, by the electronic device, key position information transmitted by the keyboard to the first contact point, processing, through the first high-pass filter, the key position information transmitted to the first contact point, receiving key position information transmitted by the keyboard to the second contact point, and processing, through the second high-pass filter, the key position information transmitted to the second contact point.