Layout structure and method for reducing audible noise generated by flexible printed circuit
AssigneeTPO Displays Corp.
InventorsChi-Ming Lee, Yu-Ming Su
Life of this patent
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Abstract
A layout structure and a method for reducing audible noise generated by a flexible printed circuit are provided. The layout structure includes a flexible printed circuit and a piezoelectric element. The flexible printed circuit is disposed with respect to an axis. When an alternating voltage/current is applied across the piezoelectric element, the piezoelectric element expands and contracts alternately. The piezoelectric element is located on the flexible printed circuit, and an angle between the axis and a side of the piezoelectric element is less than 90 degrees.
Claims13
A layout structure, comprising:
- a flexible printed circuit (FPC) disposed with respect to an axis;
- and
- a piezoelectric element located on the flexible printed circuit, the piezoelectric element expanding and contracting alternately along a side of the piezoelectric element when an alternating voltage is applied to the piezoelectric element;
- wherein an angle between the side and the axis is less than 90 degrees.
A method for reducing audible noise generated by vibration of a flexible printed circuit, the flexible printed circuit being disposed with respect to an axis, the method comprising:
- determining that vibration of the flexible printed circuit is caused by a piezoelectric element located on the flexible printed circuit, the piezoelectric element expanding and contracting alternately along a side of the piezoelectric element when an alternating voltage is applied to the piezoelectric element;
- and
- adjusting an angle between the side and the axis to reduce vibration of the flexible printed circuit.
A method for reducing audible noise generated by vibration of a flexible printed circuit, the flexible printed circuit disposed with respect to an axis, the method comprising:
- determining that vibration of the flexible printed circuit is caused by a piezoelectric element located on the flexible printed circuit, the piezoelectric element having a side, wherein a longitudinal deformation of the piezoelectric element in the side is generated when an alternating voltage is applied on the piezoelectric element;
- and
- adjusting a physical parameter of the piezoelectric element to reduce a component of the longitudinal deformation along a direction perpendicular to the axis.
Dependencies are inferred from the claim text.