US 9,811,228 B2
Touch-input display devices with force measurement using piezoelectric pillars
Martin Sacha, Nové Hrady (CZ)
Assigned to CA, Inc., New York, NY (US)
Filed by CA, Inc., New York, NY (US)
Filed on Feb. 17, 2016, as Appl. No. 15/45,660.
Prior Publication US 2017/0235387 A1, Aug. 17, 2017
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/044 (2013.01) [G06F 3/0414 (2013.01); G06F 2203/04104 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A touch-input display device comprising:
a substrate with power lines and signal lines;
piezoelectric pillars that are on and extend away from a surface of the substrate, the piezoelectric pillars are electrically isolated from each other, each of the piezoelectric pillars comprise a piezoelectric material that generates an electric voltage across a pair of the signal lines responsive to an applied touch force compressing the piezoelectric pillar, wherein the piezoelectric pillars each have a proximate end attached to the substrate and a distal end opposite to the proximate end, the distal end having a substantially planar surface; and
light emitter devices each coupled to a different one of the piezoelectric pillars and electrically connected to a pair of the power lines, wherein the light emitter devices are connected to the substantially planar surface of the distal end of the piezoelectric pillars.