US 12,346,520 B2
Seamless touchpad device
Chin-Wen Lin, Taipei (TW); Hung-Yi Lin, Taipei (TW); Wei-Ting Wong, Taipei (TW); and Ching-Fu Hsu, Taipei (TW)
Assigned to ASUSTEK COMPUTER INC., Taipei (TW)
Filed by ASUSTeK COMPUTER INC., Taipei (TW)
Filed on Dec. 27, 2023, as Appl. No. 18/396,875.
Claims priority of application No. 111150487 (TW), filed on Dec. 28, 2022.
Prior Publication US 2024/0220049 A1, Jul. 4, 2024
Int. Cl. G06F 3/041 (2006.01)
CPC G06F 3/04166 (2019.05) [G06F 3/04164 (2019.05)] 17 Claims
OG exemplary drawing
 
1. A seamless touchpad device, comprising:
at least two touchpad units, comprising a first touchpad unit and a second touchpad unit, the first touchpad unit being adjacent to the second touchpad unit,
the first touchpad unit comprising a plurality of first horizontal signal lines, a plurality of first vertical signal lines and a first control unit connected to the first horizontal signal lines and the first vertical signal lines, and
the second touchpad unit comprising a plurality of second horizontal signal lines, a plurality of second vertical signal lines and a second control unit connected to the second horizontal signal lines and the second vertical signal lines, and the second control unit being electrically connected to the first control unit,
wherein each of the first horizontal signal lines is correspondingly connected to one of the second horizontal signal lines, and part of the first vertical signal lines close to the second touchpad unit among the first vertical signal lines is individually connected to part of the second vertical signal lines close to the first touchpad unit among the second vertical signal lines, so as to form an overlapping scanning area; and
wherein the first horizontal signal line is a first receiving signal line, the first vertical signal line is a first driving signal line, the second horizontal signal line is a second receiving signal line, the second vertical signal line is a second driving signal line, and an internal impedance of the first driving signal line and the second driving signal line is a high impedance when no scanning signal is transmitted.