Ground-shifted touch input sensor for capacitively driving an electrostatic plate
First Claim
Patent Images
1. An apparatus comprising:
- a system voltage domain;
a shifted voltage domain shifted from the system voltage domain, the shifted voltage domain comprising;
a display; and
a haptic output element capacitively coupled to the display; and
an isolator circuit configured to isolate the shifted voltage domain from the system voltage domain.
0 Assignments
0 Petitions
Accused Products
Abstract
An input/output interface for an electronic device receives touch and/or force input and, additionally provides haptic output to a user. In particular the input/output interface is operated in conjunction with an input surface and includes at least one input sensor and at least one haptic output element. In typical embodiments, the input sensor is ground-shifted to prevent damage to the input sensor when the haptic output element is driven.
87 Citations
20 Claims
-
1. An apparatus comprising:
-
a system voltage domain; a shifted voltage domain shifted from the system voltage domain, the shifted voltage domain comprising; a display; and a haptic output element capacitively coupled to the display; and an isolator circuit configured to isolate the shifted voltage domain from the system voltage domain. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. An apparatus comprising:
-
a touch input surface; a system voltage source; a system ground; a display below the touch input surface and conductively decoupled from the system voltage source and the system ground; and a controller configured to provide an electrostatic haptic output through the touch input surface. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
Specification