US 12,216,011 B2
Systems and methods for improved sensing performance of pressure-sensitive conductive sheets
Yujie Zhu, Mississauga (CA); Tianxiao Xu, Oakville (CA); and Ethan Shen, Toronto (CA)
Assigned to Xerox Corporation, Norwalk, CT (US)
Filed by Xerox Corporation, Norwalk, CT (US)
Filed on Jul. 30, 2020, as Appl. No. 16/943,380.
Prior Publication US 2022/0034730 A1, Feb. 3, 2022
Int. Cl. G01L 1/20 (2006.01); G01L 1/18 (2006.01); G06F 3/041 (2006.01)
CPC G01L 1/205 (2013.01) [G01L 1/18 (2013.01); G06F 3/04144 (2019.05)] 16 Claims
OG exemplary drawing
 
1. A system for detecting item placement on a surface, comprising:
a top conductive layer;
a bottom conductive layer;
a pressure-sensitive conductive sheet interposed between the top conductive layer and the bottom conductive layer; and
a resistive grid, printed onto and fused to the pressure-sensitive conductive sheet,
wherein:
the resistive grid comprises:
a plurality of lines arranged in a pattern, and
a plurality of resistive grid patterns,
each line, of the plurality of lines, comprises an electrically non-conductive polymer,
the pressure-sensitive conductive sheet exhibits a decrease in electrical resistance with the application of pressure,
each of the plurality of resistive grid patterns comprises a unique resistive grid density configured to affect a change in the electrical resistance with the application of pressure,
each resistive grid pattern, of the plurality of resistive grid patterns, forms a modified area of the system, and
the unique resistive grid density of each of the plurality of resistive grid patterns are configured to cause variations in resistance in each modified area.