Tactile feedback module, method for making same, and touch device
First Claim
1. A tactile feedback module, comprising:
- a circuit board, the circuit board comprising a first connecting pad and a second connecting pad spaced from the first connecting pad;
a first isotropic conductive adhesive layer on the first connecting pad;
a second isotropic conductive adhesive layer on the second connecting pad; and
a piezoelectric unit, the piezoelectric unit comprising;
a piezoelectric layer having a first surface being adjacent to the circuit board, a second surface opposite to the first surface and a side surface connecting the first surface and the second surface;
a first electrode extending from the second surface of the piezoelectric layer along the side surface of the piezoelectric layer to the first surface of the piezoelectric layer, and electrically connected to the first connecting pad by the first isotropic conductive adhesive layer; and
a second electrode, at least on the first surface of the piezoelectric layer and insulated and spaced apart from the first electrode, and the second electrode electrically connected to the second connecting pad by the second isotropic conductive adhesive layer;
wherein a first voltage is applied to the first electrode by the circuit board and a second voltage different from the first voltage is applied to the second electrode by the circuit board, and the piezoelectric layer generates a tactile feedback based on a voltage difference between the first voltage and the second voltage.
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Accused Products
Abstract
A tactile feedback module not subject to a failure in function because of high-voltage arcing includes a circuit board and a piezoelectric unit. The circuit board includes spaced first connecting pad and second connecting pad. The piezoelectric unit includes a piezoelectric layer, a first electrode, and a second electrode. The piezoelectric layer is adjacent to the circuit board, and the first electrode and the second electrode are insulated from each other. A first voltage is applied to the first electrode and a second voltage different from the first voltage is applied to the second electrode, the piezoelectric layer generates a tactile feedback based on a voltage difference between the voltages. The disclosure also provides a method for making the tactile feedback module and a touch device.
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Citations
15 Claims
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1. A tactile feedback module, comprising:
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a circuit board, the circuit board comprising a first connecting pad and a second connecting pad spaced from the first connecting pad; a first isotropic conductive adhesive layer on the first connecting pad; a second isotropic conductive adhesive layer on the second connecting pad; and a piezoelectric unit, the piezoelectric unit comprising; a piezoelectric layer having a first surface being adjacent to the circuit board, a second surface opposite to the first surface and a side surface connecting the first surface and the second surface; a first electrode extending from the second surface of the piezoelectric layer along the side surface of the piezoelectric layer to the first surface of the piezoelectric layer, and electrically connected to the first connecting pad by the first isotropic conductive adhesive layer; and a second electrode, at least on the first surface of the piezoelectric layer and insulated and spaced apart from the first electrode, and the second electrode electrically connected to the second connecting pad by the second isotropic conductive adhesive layer; wherein a first voltage is applied to the first electrode by the circuit board and a second voltage different from the first voltage is applied to the second electrode by the circuit board, and the piezoelectric layer generates a tactile feedback based on a voltage difference between the first voltage and the second voltage. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A touch device, comprising:
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a cover defining a touch surface for inputting touch operations, and a plurality of tactile feedback modules on a side of the cover away from the touch surface, and each of the plurality of tactile feedback modules comprising; a circuit board, the circuit board comprising a first connecting pad and a second connecting pad spaced from the first connecting pad; a first isotropic conductive adhesive layer on the first connecting pad; a second isotropic conductive adhesive layer on the second connecting pad; and a piezoelectric unit, the piezoelectric unit comprising; a piezoelectric layer having a first surface being adjacent to the circuit board, a second surface opposite to the first surface and a side surface connecting the first surface and the second surface; a first electrode extending from the second surface of the piezoelectric layer along the side surface of the piezoelectric layer to the first surface of the piezoelectric layer, and electrically connected to the first connecting pad by the first isotropic conductive adhesive layer; and a second electrode, at least on the first surface of the piezoelectric layer, and insulated and spaced apart from the first electrode, and the second electrode electrically connected to the second connecting pad by the second isotropic conductive adhesive layer; wherein a first voltage is applied to the first electrode by the circuit board and a second voltage different from the first voltage is applied to the second electrode by the circuit board, and the piezoelectric layer generates a tactile feedback based on a voltage difference between the first voltage and the second voltage. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for making a tactile feedback module, comprising:
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Block S1;
providing a circuit board, wherein the circuit board comprises a first connecting pad and a second connecting pad spaced apart from the first connecting pad, and an uncured film-type isotropic conductive adhesive is formed on the first connecting pad and the second connecting pad;Block S2;
providing a piezoelectric unit and laminating the piezoelectric unit to the circuit board, wherein the piezoelectric unit comprises a piezoelectric layer, a first electrode and a second electrode, the piezoelectric layer has a first surface, a second surface opposite to the first surface and a side surface connecting the first surface and the second surface, the first electrode extends from the second surface of the piezoelectric layer along the side surface of the piezoelectric layer to the first surface of the piezoelectric layer, and the second electrode is at least on the first surface of the piezoelectric layer and spaced apart from the first electrode;Block S3;
curing the film-type isotropic conductive adhesive to form a first isotropic conductive adhesive layer and a second isotropic conductive adhesive layer, wherein the first electrode is electrically connected to the first connecting pad by the first isotropic conductive adhesive layer, and the second electrode is electrically connected to the second connecting pad by the second isotropic conductive adhesive layer. - View Dependent Claims (14, 15)
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Specification