US 12,425,024 B2
Electromagnetic coding switch, and rotation information calculation method and apparatus for rotary wheel
Zhouhong Wang, Shenzhen (CN)
Assigned to Shenzhen Huion Trend Technology Co., Ltd., Shenzhen (CN)
Appl. No. 18/697,293
Filed by Shenzhen Huion Trend Technology Co., Ltd., Shenzhen (CN)
PCT Filed Oct. 25, 2022, PCT No. PCT/CN2022/127357
§ 371(c)(1), (2) Date Mar. 29, 2024,
PCT Pub. No. WO2023/072066, PCT Pub. Date May 4, 2023.
Claims priority of application No. 202111285547.7 (CN), filed on Nov. 1, 2021.
Prior Publication US 2024/0405774 A1, Dec. 5, 2024
Int. Cl. H03K 17/94 (2006.01)
CPC H03K 17/94 (2013.01) [H03K 2217/009 (2013.01); H03K 2217/94068 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An electromagnetic coding switch, comprising:
a rotary wheel assembly, comprising:
an LC resonant circuit, comprising an inductor L and a capacitor C connected to the inductor L, wherein the inductor L has a magnetic core and is configured to receive and transmit an electromagnetic wave, and
a rotary wheel, wherein the LC resonant circuit is arranged on the rotary wheel; and
a transceiver unit, comprising:
an antenna, arranged under the rotary wheel and configured to transmit a magnetic wave at a predetermined frequency within a transmission cycle such that the LC resonant circuit receives energy within the transmission cycle, and
an antenna selection switch, connected to the antenna.