Electronic devices and methods for detecting foreign object on connector
AssigneeSamsung Electronics Co., Ltd.
InventorJe-kook Kim
Life of this patent
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Abstract
An electronic device including a connector having a plurality of pins, and a detection circuit having at least one of a pull-up circuit and a pull-down circuit, and a connection circuit between a first pin and a second pin of the plurality of pins, the detection circuit is configured to select the first pin and the second pin, measure an impedance between the selected first pin and second pin by controlling a connection of the connection circuit and the at least one of the pull-up circuit and the pull-down circuit, and generate a detection signal indicating a presence or an absence of a foreign object on the connector based on the measured impedance.
Claims20
An electronic device comprising:
- a connector including a first pin and a plurality of pins;
- and
- a detection circuit including:
- a selection circuit configured to select a second pin among the plurality of pins,
- a connection circuit including a first resistor connectable between a first node connected to the first pin and a second node connected to the second pin, and
- a pull-down circuit configured to provide a ground voltage to the second node,
- the detection circuit configured to:
- measure an impedance between the first pin and the second pin by controlling a connection of the connection circuit and the pull-down circuit, and
- generate a detection signal indicating a presence or an absence of a foreign object on the connector based on the measured impedance.
A method of detecting a foreign object on a connector of an electronic device, the connector including a first pin and a plurality of pins, the method comprising:
- selecting a second pin among the plurality of pins included in the connector;
- measuring an impedance between the first pin and the second pin by controlling a connection of a connection circuit and a pull-down circuit;
- and
- generating a detection signal indicating a presence or an absence of a foreign object on the connector based on the measured impedance,
- wherein the connection circuit includes a resistor connectable between a first node connected to the first pin and a second node connected to the second pin, and
- the pull-down circuit is configured to provide a ground voltage to the second node.
A method of providing a foreign object alarm message of an electronic device, the electronic device including a connector including a first pin and a plurality of pins, the method comprising:
- selecting a second pin among the plurality of pins included in the connector;
- measuring an impedance between the first pin and the second pin by controlling a connection of a connection circuit and a pull-down circuit;
- generating a detection signal indicating a presence or an absence of a foreign object on the connector based on the measured impedance;
- and
- providing the foreign object alarm message according to the generated detection signal, by an alarm message generator of the electronic device,
- wherein the connection circuit includes a resistor connectable between a first node connected to the first pin and a second node connected to the second pin, and
- the pull-down circuit is configured to provide a ground voltage to the second node.
Dependencies are inferred from the claim text.