US 11,656,685 B1
Information handling system keyboard with haptic enhanced membrane trigger
Brandon J. Brocklesby, Pflugerville, TX (US); Robert D. Hrehor, Jr., Round Rock, TX (US); Chiu-Jung Tsen, Zhubei (TW); and Hsu-Feng Lee, Taipei (TW)
Assigned to Dell Products L.P., Round Rock, TX (US)
Filed by Dell Products L.P., Round Rock, TX (US)
Filed on Apr. 27, 2022, as Appl. No. 17/730,347.
Int. Cl. G06F 3/02 (2006.01); G06F 3/01 (2006.01)
CPC G06F 3/016 (2013.01) [G06F 3/0202 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A portable information handling system comprising:
a housing;
a processor disposed in the housing and operable to execute instructions that process information;
a memory disposed in the housing and interfaced with the processor, the memory operable to store the instructions and information; and
a keyboard coupled to the housing and interfaced with the processor, the keyboard having plural keys to accept end user key inputs, a membrane disposed under the keys to detect a key input when the key moves downward to hit the membrane and at least one piezoelectric device disposed under one of the plural keys to actuate when the one of the plural keys contacts the membrane, a first set of the plural keys having a first vertical travel to hit the membrane, a second set of the plural keys have a second vertical travel to contact the membrane, the second vertical travel greater than the first vertical travel, the at least one piezoelectric device under each key of the first set of plural keys to create a haptic effect when the key of the first set of plural keys presses against the membrane, none of the second set of keys having the piezoelectric device underneath, the piezoelectric devices not creating a haptic effect when the key of the second set of plural keys presses against the membrane.