US 11,836,304 B2
Digital pen sensor surface
Fred Charles Thomas, III, Fort Collins, CO (US); Paul Mazurkiewicz, Fort Collins, CO (US); and Bruce Eric Blaho, Fort Collins, CO (US)
Assigned to HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P., Spring, TX (US)
Appl. No. 17/922,541
Filed by HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P., Spring, TX (US)
PCT Filed Apr. 30, 2020, PCT No. PCT/US2020/030773
§ 371(c)(1), (2) Date Oct. 31, 2022,
PCT Pub. No. WO2021/221669, PCT Pub. Date Nov. 4, 2021.
Prior Publication US 2023/0205328 A1, Jun. 29, 2023
Int. Cl. G06F 3/0354 (2013.01); G06F 3/044 (2006.01); G06F 3/041 (2006.01)
CPC G06F 3/03545 (2013.01) [G06F 3/0442 (2019.05)] 15 Claims
OG exemplary drawing
 
1. An electronic device, comprising:
an active digital pen sensor surface to generate analog position information, wherein the active digital pen sensor surface includes a projective capacitive sensor layer with a variance of sheet resistance of less than plus or minus 20 percent; and
a controller, including a sigma-delta analog-to-digital (A-to-D) converter, to generate digital pen position information based on the analog position information, and perform a triangulation based on the digital pen position information to determine a pen position.