Signal interaction method for simultaneously accommodating writing of multiple active pens

• Main Authors: ZHAO HONGHAO, BAO YUYANG
• Format: Patent
• Language: Chinese; English
• Published: 25.07.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention relates to a signal interaction method for simultaneously accommodating writing of a plurality of active pens, which comprises the following steps: a touch system drives an uplink synchronization signal and transmits the uplink synchronization signal to the active pens; after the active pen receives the uplink synchronization signal, each active pen drives downlink signals with the same frequency but different sequences for multiple times and transmits the downlink signals to the touch control system; the touch system demodulates and decodes the received downlink signal transmitted by each active pen to obtain coordinate information of the corresponding active pen; the steps are repeated according to the fixed frequency, the touch system continuously interacts with the active pens, and subsequent coordinate information of each active pen is obtained. Downlink signals driven by a plurality of active pens are received at the same time in a sub-time slice, the respective demodulation result of each