US 11,656,686 B2
Method and apparatus for modulating haptic feedback
Benjamin John Oliver Long, Bristol (GB); Thomas Andrew Carter, Bristol (GB); and Sriram Subramanian, Bristol (GB)
Assigned to ULTRAHAPTICS IP LTD, Bristol (GB)
Filed by Ultrahaptics IP Ltd, Bristol (GB)
Filed on Nov. 30, 2022, as Appl. No. 18/60,525.
Application 18/060,525 is a continuation of application No. 17/645,305, filed on Dec. 20, 2021.
Application 17/645,305 is a continuation of application No. 16/600,500, filed on Oct. 13, 2019, granted, now 11,204,644, issued on Dec. 21, 2021.
Application 16/600,500 is a continuation of application No. 15/966,213, filed on Apr. 30, 2018, granted, now 10,444,842, issued on Oct. 15, 2019.
Application 15/966,213 is a continuation of application No. 14/916,179, granted, now 9,958,943, issued on May 1, 2018, previously published as PCT/GB2015/052578, filed on Sep. 7, 2015.
Claims priority of application No. 1415923 (GB), filed on Sep. 9, 2014.
Prior Publication US 2023/0095030 A1, Mar. 30, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/01 (2006.01); G08B 6/00 (2006.01); G06N 10/80 (2022.01); G06N 10/20 (2022.01)
CPC G06F 3/016 (2013.01) [G06N 10/20 (2022.01); G06N 10/80 (2022.01); G08B 6/00 (2013.01); G06F 3/011 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method of creating haptic feedback using ultrasound comprising the steps of:
using a plurality of ultrasonic transducers, generating a plurality of ultrasound waves,
wherein at least two of the plurality of ultrasound waves form a focal point,
wherein the focal point is a haptic feedback point;
first modulating the generating of the plurality of ultrasound waves using a waveform to produce a haptic sensation at the haptic feedback point, which produces less audible sound pressure level than would be produced at the haptic feedback point when second modulating the generating of the plurality of ultrasound waves using a square wave modulation pattern.