US 11,716,036 B1
Haptic feedback devices with reduced power consumption
Miroslav Yakov Shverdin, Mountain View, CA (US); Szymon Michal Tankiewicz, San Jose, CA (US); and Varn Khanna, Vallejo, CA (US)
Assigned to Amazon Technologies, Inc, Seattle, WA (US)
Filed by Amazon Technologies, Inc., Seattle, WA (US)
Filed on Mar. 18, 2019, as Appl. No. 16/356,308.
Int. Cl. G08B 6/00 (2006.01); H02N 2/06 (2006.01); H02N 2/04 (2006.01); G06F 1/32 (2019.01); G06F 1/16 (2006.01); G06F 1/18 (2006.01)
CPC H02N 2/067 (2013.01) [G06F 1/32 (2013.01); G06F 1/163 (2013.01); G06F 1/183 (2013.01); G06F 1/189 (2013.01); G06F 1/1698 (2013.01); G08B 6/00 (2013.01); H02N 2/043 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A ring-shaped device comprising:
a housing comprising an upper portion, a curved lower portion, a first curved side portion, and a second curved side portion;
a flexible printed circuit disposed at least partially within the upper portion of the housing;
a haptic feedback device disposed on the flexible printed circuit, the haptic feedback device comprising:
a stacked resonant piezoelectric actuator comprising a plurality of piezoelectric ceramic elements arranged in a stacked configuration, the stacked resonant piezoelectric actuator configured to generate linear movement responsive to an applied voltage;
a first spring comprising a first distal end and a second distal end, the first spring coupled to the stacked resonant piezoelectric actuator at the first distal end; and
a mass coupled to the first spring at the second distal end of the first spring;
an inverter comprising a switching device, the inverter disposed on the flexible printed circuit and coupled to the haptic feedback device, wherein the inverter is configured to convert direct current to alternating current that has a sinusoidal waveform, and to provide the applied voltage to the haptic feedback device; and
a battery coupled to the inverter and configured to supply the applied voltage to the stacked resonant piezoelectric actuator.