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Tactile Feedback Generated By Non-linear Interaction of Surface Acoustic Waves
| Content Provider | The Lens |
|---|---|
| Abstract | Described embodiments include a system and a method. A system includes a first ultrasound transmitter acoustically coupled to a conducting layer of a display surface and configured to deliver a first ultrasound wave to a selected delineated area. The first ultrasonic wave has parameters sufficient to induce a non-linear vibrational response in the conducting layer. A second ultrasound transmitter is acoustically coupled to the conducting layer and configured to deliver a second ultrasound wave to the selected delineated area. The second ultrasonic wave has parameters sufficient to induce a non-linear vibrational response in the conducting layer. A controller selects a delineated area in response to an indication of a touch to the display surface, and initiates delivery of the first and second ultrasonic waves. A convergence of the first and second ultrasonic waves at the selected delineated area produces a stress pattern perceivable or discernible by the human appendage. |
| Related Links | https://www.lens.org/lens/patent/106-979-318-830-242/frontpage |
| Language | English |
| Publisher Date | 2017-10-31 |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Patent |
| Jurisdiction | United States of America |
| Date Applied | 2013-06-27 |
| Applicant | Elwha Llc |
| Application No. | 201313929387 |
| Claim | A system comprising: a first ultrasound transmitter acoustically coupled to an ultrasound-conducting layer of a display surface and configured to deliver a first ultrasound wave to a delineated area selected from at least two delineated areas of the display surface, the first ultrasonic wave having a first carrier frequency and amplitude sufficient to induce a non-linear vibrational response of the ultrasound-conducting layer; a second ultrasound transmitter acoustically coupled to the ultrasound-conducting layer and configured to deliver a second ultrasound wave to the selected delineated area, the second ultrasonic wave having a second carrier frequency and amplitude sufficient to induce a non-linear vibrational response of the ultrasound-conducting layer; and a controller configured to select a delineated area from the at least two delineated areas in response to an indication of a location of a detected touch by a human appendage to the display surface, and to initiate a delivery of the first ultrasonic wave by the first ultrasound transmitter and a delivery of the second ultrasonic wave by the second ultrasound transmitter to the selected delineated area, the parameters of the first carrier frequency and amplitude and second carrier frequency and amplitude are such that a non-linear interaction of the first ultrasound wave and the second ultrasound wave at the selected delineated area produces a stress pattern having a different frequency, the different frequency being directly perceivable or discernible by the human appendage. The system of claim 1 , wherein the delineated area includes a delineated selectable area or region displayed by or projected on a two-dimensional display surface. The system of claim 1 , wherein the ultrasound wave includes a longitudinal or a shear wave. The system of claim 1 , wherein the first ultrasonic wave includes a first surface acoustic wave. The system of claim 1 , wherein the second ultrasonic wave includes a second surface acoustic wave. The system of claim 1 , wherein the first ultrasonic wave propagates toward the selected delineated area in a first direction, the second ultrasonic wave propagates toward the selected delineated area in a second direction, and the second direction is different from the first direction. The system of claim 6 , wherein the second direction is orthogonal with respect to the first direction. The system of claim 1 , wherein the non-linear interaction of the first ultrasound wave and the second ultrasound wave at the selected delineated area produces a stress pattern having a frequency-downshifted component. The system of claim 8 , wherein the non-linear interaction of the first ultrasound wave and the second ultrasound wave at the selected delineated area produces a stress pattern having a frequency-downshifted component between approximately 10 Hz and 1000 Hz. The system of claim 8 , wherein the produced stress pattern includes a frequency-downshifted component between approximately 65 Hz and 4190 Hz. The system of claim 8 , wherein the produced stress pattern includes a frequency-downshifted component between approximately 130 Hz and 2100 Hz. The system of claim 1 , wherein the parameters of the first carrier frequency, amplitude, and pulse duration, and second carrier frequency amplitude, and pulse duration, are such that a non-linear interaction of the first ultrasound wave and the second ultrasound wave at the selected delineated area produces a stress pattern directly perceivable or discernible by the human appendage. The system of claim 1 , wherein the stress pattern is tactilely perceivable or discernible by the human appendage. The system of claim 1 , wherein the stress pattern produces a haptic stimulation directly perceivable or discernible by a human appendage touching the first delineated area. The system of claim 1 , wherein the stress pattern produces a tactile haptic feedback directly perceivable or discernible by a human appendage touching the first delineated area. The system of claim 1 , wherein the non-linear interaction includes a non-linear superposition. The system of claim 1 , wherein the controller includes a controller configured to (i) receive an indication of a location of a detected touch by a human appendage to the display surface, (ii) retrieve or select a stress pattern from a lookup table responsive to the indication of the location of the detected touch, (iii) specify the first carrier frequency and amplitude and second carrier frequency and amplitude in response to the retrieved or selected stress pattern; and (iv) initiate a delivery of the specified first ultrasonic wave by the first ultrasound transmitter and a delivery of the second specified ultrasonic wave by the second ultrasound transmitter to the selected delineated area. The system of claim 1 , further comprising: a touch tracking device configured to determine a location of a touch by the human appendage to the display surface. The system of claim 18 , wherein the touch tracking device configured to determine a location of a touch by the human appendage relative to a delineated area of the display surface. The system of claim 18 , wherein the touch tracking device is further configured to report a location of the detected touch. The system of claim 1 , further comprising: a third ultrasound transmitter acoustically coupled to the ultrasound-conducting layer and configured to deliver a third ultrasound wave to another delineated area selected from the at least two delineated areas, the third ultrasonic wave having a third carrier frequency and amplitude sufficient to induce a non-linear vibrational response of the ultrasound-conducting layer, the parameters of the first carrier frequency and amplitude and third carrier frequency and amplitude are such that a non-linear interaction of the first ultrasound wave and the third ultrasound wave at the another selected delineated area produces another stress pattern directly perceivable or discernible by another human appendage. The system of claim 21 , wherein the controller is further configured to select the another delineated area from the at least two delineated areas in response to another indication of a location of another detected touch by another human appendage to the display surface, and to initiate a delivery of the first ultrasonic wave by the first ultrasound transmitter and a delivery of the third ultrasonic wave by the third ultrasound transmitter to the another selected delineated area. The system of claim 21 , wherein the delivery of the first ultrasound wave and the second ultrasound wave to the selected delineated area, and the delivery of the first ultrasound wave and the third ultrasound wave to the another delineated area are coordinated by the controller to appear sequentia The system of claim 1 , wherein the first ultrasound transmitter includes a first steered-beam ultrasound transmitter. The system of claim 24 , wherein the first ultrasound transmitter includes a first steered-beam ultrasound transmitter and the second ultrasound transmitter includes a second steered-beam ultrasound transmitter. The system of claim 25 , wherein the first steered-beam ultrasound transmitter and the second steered-beam ultrasound transmitter are not co-aligned. The system of claim 24 , wherein the first steered-beam ultrasound transmitter is configured to deliver a first phase-conjugated ultrasound wave. The system of claim 1 , wherein the first ultrasound transmitter includes a steered-beam, phased-array ultrasound transmitter. The system of claim 28 , wherein the first steered-beam ultrasound transmitter includes a first steered-beam ultrasound transmitter configured to deliver a first focused, phase-conjugated ultrasound wave to the selected delineated area. The system of claim 1 , wherein the first ultrasound transmitter includes a first steered-beam, amplitude-patterned ultrasound transmitter. The system of claim 1 , wherein the second ultrasound transmitter is physically spaced-apart from the first ultrasound transmitter. A method comprising: selecting a delineated area of at least two delineated areas of a display surface in response to a detected touch by a human appendage to the display surface; delivering a first ultrasound wave to the selected delineated area, the first ultrasound wave transmitted by a first ultrasound transmitter acoustically coupled to an ultrasound-conducting layer of the display surface and configured to deliver the first ultrasound wave to the delineated area selected from the at least two delineated areas of the display surface, the first ultrasonic wave having a first carrier frequency and amplitude sufficient to induce a non-linear vibrational response of the ultrasound-conducting layer; and delivering a second ultrasound wave to the selected delineated area, the second ultrasound wave transmitted by a second ultrasound transmitter acoustically coupled to the ultrasound-conducting layer and configured to deliver the second ultrasound wave to the selected delineated area, the second ultrasonic wave having a second carrier frequency and amplitude sufficient to induce a non-linear vibrational response of the ultrasound-conducting layer, the parameters of the first carrier frequency and amplitude and the second carrier frequency and amplitude are such that a non-linear interaction of the first ultrasound wave and the second ultrasound wave at the selected delineated area produce a stress pattern tactilely perceivable or discernible by the human appendage. The method of claim 32 , further comprising: detecting the location of a touch by the human appendage to at least a portion of a delineated area of a display surface having at least two delineated areas. A system comprising: means for selecting a delineated area of at least two delineated areas of a display surface in response to a detected touch by a human appendage to the display surface; means for delivering a first ultrasound wave to the selected delineated area, the means for delivering the first ultrasound wave acoustically coupled to an ultrasound-conducting layer of the display surface and configured to deliver the first ultrasound wave to a delineated area selected from the at least two delineated areas of the display surface, the first ultrasonic wave having a first carrier frequency and amplitude sufficient to induce a non-linear vibrational response of the ultrasound-conducting layer; and means for delivering a second ultrasound wave to the selected delineated area, the means for delivering the second ultrasound wave acoustically coupled to the ultrasound-conducting layer and configured to deliver the second ultrasound wave to the selected delineated area, the second ultrasonic wave having a second carrier frequency and amplitude sufficient to induce a non-linear vibrational response of the ultrasound-conducting layer, the parameters of the first carrier frequency and amplitude and the second carrier frequency and amplitude are such that a non-linear interaction of the first ultrasound wave and the second ultrasound wave at the selected delineated area produce a stress pattern tactilely perceivable or discernible by the human appendage. The system of claim 34 , further comprising: means for detecting the location of a touch by the human appendage to at least a portion of a delineated area of a display surface having at least two delineated areas. |
| CPC Classification | ELECTRIC DIGITAL DATA PROCESSING |
| Examiner | Dennis Joseph |
| Extended Family | 148-468-985-085-396 106-979-318-830-242 098-128-302-919-927 003-942-180-722-332 |
| Patent ID | 9804675 |
| Inventor/Author | Cheatham Iii Jesse R Gates William Hyde Roderick A Ishikawa Muriel Y Kare Jordin T Myhrvold Nathan P Pan Tony S Petroski Robert C Wood Jr Lowell L Wood Victoria Y H |
| IPC | G06F3/043 G06F3/01 G06F3/0488 |
| Status | Inactive |
| Owner | Elwha Llc |
| Simple Family | 106-979-318-830-242 003-942-180-722-332 098-128-302-919-927 148-468-985-085-396 |
| CPC (with Group) | G06F3/016 G06F3/0436 G06F3/04886 |
| Issuing Authority | United States Patent and Trademark Office (USPTO) |
| Kind | Patent/New European patent specification (amended specification after opposition procedure) |
