US 11,921,958 B2
Haptic interface
Fabrice Casset, Grenoble (FR); and Angélique Rascle, Grenoble (FR)
Assigned to COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, Paris (FR)
Filed by COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, Paris (FR)
Filed on Nov. 26, 2021, as Appl. No. 17/456,602.
Claims priority of application No. 20 12213 (FR), filed on Nov. 26, 2020.
Prior Publication US 2022/0164043 A1, May 26, 2022
Int. Cl. G06F 3/043 (2006.01); G06F 3/041 (2006.01)
CPC G06F 3/043 (2013.01) [G06F 3/0416 (2013.01); G06F 2203/04103 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A haptic interface of a ‘mid-air’ type, comprising:
a control circuit; and
a plurality of ultrasonic transducers connected to said circuit, which includes a first set of transducers emitting at a first ultrasound carrier frequency and at least a second set of transducers emitting at a second ultrasound carrier frequency different from the first, wherein
the control circuit is configured to modulate signals sent to the transducers to:
generate, with ultrasound waves emitted by at least a part of the transducers of the first set, an acoustic pressure detectable by touch within at least a first focal region, and
generate, with ultrasound waves emitted by at least a part of the transducers of the second set, an acoustic pressure detectable by touch within at least a second focal region,
a size of and/or materials of the second set of transducers differ from a size of and/or materials of the first set of transducers, and
the first set of transducers and the second set of transducers emit within a 20 kHz-150 kHz carrier frequency range.