Piezoelectric touch sensor array
First Claim
1. A touch sensor assembly comprising:
- a sensor housing provided behind an exterior surface of a household appliance in which an touch input area is provided;
a sensor printed circuit board (PCB) provided inside the sensor housing and having a top surface on which a conductive layer is formed;
a touch sensor, the touch sensor including a metal plate having a bottom surface in contact with the conductive layer and a ceramic element provided on a top surface of the metal plate;
a spacer having a sensor hole formed at a position corresponding to the sensor and having a bottom surface attached to a top surface of the conductive layer;
a conductive foil attached to a top surface of the spacer and having a bottom surface on which an inner guide line configured to apply an electric current to the ceramic element and an outer guide line configured to apply an electric current to the metal plate are printed; and
a contact layer formed to protrude from a top surface of the conductive foil corresponding to a position of the inner guide line.
1 Assignment
0 Petitions
Accused Products
Abstract
A touch sensor assembly may include a sensor housing disposed at a bottom surface of an exterior member of a household appliance in which an operation unit on which a user touches is formed; a sensor PCB which is provided inside the sensor housing and has a top surface on which a copper coating or film is formed; a touch sensor, the touch sensor including: a metal plate having a bottom surface in contact with the copper coating or film; and a ceramic element installed on a top surface of the metal plate; a spacer in which a sensor hole is formed at a position corresponding to the sensor and which has a bottom surface attached to a surface of the copper coating or film; a conductive foil attached to a top surface of the spacer and having a bottom surface on which an inner guide line which applies an electric current to the ceramic element and an outer guide line which applies an electric current to the metal plate are printed; and a contact portion formed to protrude from a top surface of the conductive foil corresponding to a position of the inner guide line.
72 Citations
33 Claims
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1. A touch sensor assembly comprising:
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a sensor housing provided behind an exterior surface of a household appliance in which an touch input area is provided; a sensor printed circuit board (PCB) provided inside the sensor housing and having a top surface on which a conductive layer is formed; a touch sensor, the touch sensor including a metal plate having a bottom surface in contact with the conductive layer and a ceramic element provided on a top surface of the metal plate; a spacer having a sensor hole formed at a position corresponding to the sensor and having a bottom surface attached to a top surface of the conductive layer; a conductive foil attached to a top surface of the spacer and having a bottom surface on which an inner guide line configured to apply an electric current to the ceramic element and an outer guide line configured to apply an electric current to the metal plate are printed; and a contact layer formed to protrude from a top surface of the conductive foil corresponding to a position of the inner guide line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A refrigerator door comprising:
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an exterior member having a touch input area for a user to provide at least one touch input; a sensor housing provided behind the touch input area and a rear surface of the exterior member; a touch transfer plate movably coupled to the sensor housing, which has a top surface contacting the rear surface of the exterior member, and a bottom surface on which a protrusion is formed; a sensor printed circuit board (PCB) provided inside the sensor housing and having a conductive layer on a top surface; a touch sensor having a metal plate and a ceramic element provided on a top surface of the metal plate, the metal plate having a bottom surface in contact with the conductive layer; and a spacer having a sensor hole corresponding to a position of the sensor and having a bottom surface attached to a top surface of the conductive layer; a conductive foil attached to a top surface of the spacer and having an inner guide line printed on a bottom surface and configured to apply an electric current to the ceramic element; and a contact layer formed to protrude from a top surface of the conductive foil corresponding to a position of the inner guide line, wherein the contact layer contacts the protrusion. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification