Electronic device with liquid contact sensors
First Claim
1. An electronic device, comprising:
- an electronic device housing;
a liquid contact sensor mounted in the electronic device housing, wherein the liquid contact sensor has first and second electrodes and first and second resistors coupled in series between the second electrode and ground; and
control circuitry in the electronic device housing that is coupled to the electrodes, wherein the control circuitry is configured to monitor liquid exposure events with the liquid contact sensor in which moisture enters the electronic device housing, and wherein the control circuitry monitors the voltage across the first resistor.
1 Assignment
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Accused Products
Abstract
Electronic devices may be accidentally exposed to liquid during operation. To detect liquid intrusion events, an electronic device may be provided with one or more electronic liquid contact sensors. The liquid contact sensors may have electrodes. Control circuitry may make measurements across the electrodes such as resistance and capacitance measurements to detect the presence of liquid. Liquid contact sensor data may be maintained in a log within storage in the electronic device. The liquid contact sensor data can be used to display information for a user of the electronic device or can be loaded onto external equipment for analysis. Liquid contact sensor electrodes may be formed from metal traces on substrates such as printed circuits, from contacts in a connector, from contacts on an integrated circuit, or from other conductive electrode structures.
56 Citations
31 Claims
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1. An electronic device, comprising:
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an electronic device housing; a liquid contact sensor mounted in the electronic device housing, wherein the liquid contact sensor has first and second electrodes and first and second resistors coupled in series between the second electrode and ground; and control circuitry in the electronic device housing that is coupled to the electrodes, wherein the control circuitry is configured to monitor liquid exposure events with the liquid contact sensor in which moisture enters the electronic device housing, and wherein the control circuitry monitors the voltage across the first resistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method, comprising:
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gathering liquid contact sensor measurement data with a plurality of liquid contact sensors in a portable electronic device; storing the liquid contact sensor measurement data in storage in the portable electronic device; based on the liquid contact sensor measurement data from the plurality of liquid contact sensors, determining a location in the portable electronic device that has been exposed to moisture; and based on the determined location in the electronic device, deactivating at least one electronic component in the portable electronic device. - View Dependent Claims (19, 20, 21, 22)
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23. A portable electronic device, comprising:
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a housing; a display in the housing; a plurality of electronic liquid contact sensors in the housing; an external connector port mounted in the housing, wherein at least one of the plurality of electronic liquid contact sensors has electrodes that are integrated into the external connector port; and control circuitry coupled to the plurality of electronic liquid contact sensors, wherein the control circuitry and the electronic liquid contact sensors are configured to monitor for liquid intruding into the housing. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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Specification