US 11,899,843 B2
Bipolar projected haptics with balanced loading
James E. Colgate, Evanston, IL (US); Mondher Cherif, Evanston, IL (US); David J. Meyer, Chicago, IL (US); and Craig Shultz, Chicago, IL (US)
Assigned to Tanvas Magic Inc., Surfside, FL (US)
Filed by Tanvas, Inc., Chicago, IL (US)
Filed on Dec. 5, 2022, as Appl. No. 18/074,658.
Application 18/074,658 is a continuation of application No. 16/884,932, filed on May 27, 2020, granted, now 11,520,406.
Claims priority of provisional application 62/853,419, filed on May 28, 2019.
Prior Publication US 2023/0097247 A1, Mar. 30, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/01 (2006.01); G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/016 (2013.01) [G06F 3/044 (2013.01); G06F 3/0416 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An indirect haptic device, comprising:
a substrate having a touch surface comprising a top surface and a bottom surface;
a plurality of haptic electrodes and a plurality of island electrodes, both arranged on the top surface of the substrate;
a plurality of transmit electrodes and a plurality of receive electrodes, both arranged on the bottom surface of the substrate;
and
a control device connected to the transmit electrodes and the receive electrodes, wherein the control device is configured to apply bipolar electrical signals to the plurality of transmit electrodes to both detect one or more touch locations of a user's appendage on the touch surface and modulate a friction between the user's appendage and the touch surface;
wherein the plurality of haptic electrodes are disposed such that the touch location of the user's appendage on the touch surface will always engage more than one of the plurality of haptic electrodes;
wherein the plurality of haptic electrodes and the plurality of island electrodes do not have any ohmic or direct connection to other conductive elements;
wherein each of the plurality of haptic electrodes is substantially aligned with and capacitively coupled to one of the plurality of transmit electrodes.