Ground-shifted touch input sensor for capacitively driving an electrostatic plate
First Claim
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1. An apparatus comprising:
- a protective outer layer configured to receive a user input;
a display positioned below the protective outer layer;
a haptic output element positioned between the display and the protective outer layer, the haptic output element capacitively coupled to the display; and
a controller configured to ground-shift the display to drive the haptic output element.
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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.
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Citations
22 Claims
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1. An apparatus comprising:
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a protective outer layer configured to receive a user input; a display positioned below the protective outer layer; a haptic output element positioned between the display and the protective outer layer, the haptic output element capacitively coupled to the display; and a controller configured to ground-shift the display to drive the haptic output element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus comprising:
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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, the touch display comprising; a local voltage source; and a local ground; and a controller configured to modulate the local voltage source and the local ground of the display with a bias greater than the system voltage source and the system ground to provide an electrostatic haptic output through the touch input surface. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method of providing haptic output, the method comprising:
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receiving a haptic feedback instruction; increasing a local ground of a display based on the haptic feedback instruction; and increasing a local voltage source of the display based on the haptic feedback instruction. - View Dependent Claims (21, 22)
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Specification