Granted Patent B2

US 12,549,656 · App. 18/288,961 · Granted Feb 10, 2026

Inventors: Xiaoliang Zhang (Shenzhen, CN); Yigang Feng (Shenzhen, CN)

Assignee: InterDigital Patent Holdings, Inc.

H04M1/18G06F3/044

Abstract

Claims (38)

1 . A method for identifying a water ingress risk of a smart terminal, comprising:

acquiring a first variation amount of a capacitance signal of a capacitive touch screen caused by connection between a ground wire provided along an edge of a glass cover plate on an outer surface of a housing of the smart terminal and a chip ground of a capacitive touch screen chip of the smart terminal;

acquiring a second variation amount of the capacitance signal of the capacitive touch screen caused by disconnection between the ground wire provided along the edge of the glass cover plate on the outer surface of the housing and the chip ground of the capacitive touch screen chip;

comparing the acquired first variation amount of the capacitance signal and the acquired second variation amount of the capacitance signal with at least one of a first capacitance interval or a second capacitance interval;

in response to determining that both the first variation amount of the capacitance signal and the second variation amount of the capacitance signal are within the first capacitance interval:

determining that there is no water on an outer surface of the capacitive touch screen, and

determining that there is no water ingress risk of the smart terminal; and

in response to determining that the first variation amount of the capacitance signal is within the first capacitance interval and the second variation amount of the capacitance signal is within the second capacitance interval:

determining presence of water on the outer surface of the capacitive touch screen,

determining the water ingress risk of the smart terminal, and

determining an occurrence time and a duration of the water ingress risk,

wherein a variation amount of the capacitance signal within the first capacitance interval is greater than the variation amount of the capacitance signal within the second capacitance interval.

2 . The method according to claim 1 , wherein the ground wire on the outer surface of the housing is connected to and disconnected from the chip ground of the capacitive touch screen chip within a preset time interval.

3 . The method according to claim 1 , further comprising:

under a condition that the smart terminal has the water ingress risk, giving an alarm to remind a user to wipe off water on the outer surface of the housing and/or move the smart terminal away from a water source.

4 . The method according to claim 3 , wherein giving the alarm to remind the user to wipe off water on the outer surface of the housing and/or move the smart terminal away from the water source comprises:

sending the alarm to other devices capable of communicating with the smart terminal by means of vibration, ringing, voice broadcast, or screen display, so as to remind the user to wipe off water on the outer surface of the housing or move the smart terminal away from the water source.

5 . A non-transitory storage medium, the storage medium storing one or more programs; wherein the one or more programs, when being executed by a processor, cause the processor to implement one or more operations of the method for identifying the water ingress risk of the smart terminal according to claim 1 .

6 . The method according to claim 1 , wherein the chip ground of the capacitive touch screen chip is a grounding pin of the capacitive touch screen chip, or is a grounding wire led out from a grounding pin of the capacitive touch screen chip.

7 . The method according to claim 1 , further comprising:

under a condition that the smart terminal has the water ingress risk, uploading the occurrence time and the duration of the water ingress risk of the smart terminal to a cloud server.

8 . The method according to claim 1 , wherein the ground wire on the outer surface of the housing is a closed or non-closed ground wire.

9 . A device for identifying a water ingress risk of a smart terminal, the device comprising a memory and a processor;

wherein the memory stores a program running on the processor, and the processor is configured to implement following operations when executing the program:

acquiring a first variation amount of a capacitance signal of a capacitive touch screen caused by connection between a ground wire provided along an edge of a glass cover plate on an outer surface of a housing of the smart terminal and a chip ground of a capacitive touch screen chip of the smart terminal,

acquiring a second variation amount of the capacitance signal of the capacitive touch screen caused by disconnection between the ground wire provided along the edge of the glass cover plate on the outer surface of the housing and the chip ground of the capacitive touch screen chip,

comparing the acquired first variation amount of the capacitance signal and the acquired second variation amount of the capacitance signal with at least one of a first capacitance interval or a second capacitance interval;

in response to determining that both the first variation amount of the capacitance signal and the second variation amount of the capacitance signal are within the first capacitance interval:

determining that there is no water on an outer surface of the capacitive touch screen, and

determining that there is no water ingress risk of the smart terminal; and in response to determining that the first variation amount of the capacitance signal is within the first capacitance interval and the second variation amount of the capacitance signal is within the second capacitance interval: determining presence water on the outer surface of the capacitive touch screen, determining the water ingress risk of the smart terminal, and determining an occurrence time and a duration of the water ingress risk, wherein a variation amount of the capacitance signal within the first capacitance interval is greater than the variation amount of the capacitance signal within the second capacitance interval.

10 . A smart terminal, comprising: a housing, a capacitive touch screen sensor, a capacitive touch screen chip, and a capacitive touch screen, wherein a ground wire is mounted along an edge of a glass cover plate on an outer surface of the housing of the smart terminal, and is connected to a chip ground of the capacitive touch screen chip through a switch device, wherein the switch device is used for controlling connection of the ground wire to the chip ground of the capacitive touch screen chip or disconnection of the ground wire from the chip ground of the capacitive touch screen chip;

the capacitive touch screen sensor is mounted above the capacitive touch screen, and is used for respectively acquiring a first variation amount of a capacitance signal of the capacitive touch screen caused by connection between the ground wire on the outer surface of the housing of the smart terminal and the chip ground of the capacitive touch screen chip of the smart terminal, and a second variation amount of the capacitance signal of the capacitive touch screen caused by disconnection between the ground wire on the outer surface of the housing and the chip ground of the capacitive touch screen chip; and

the capacitive touch screen chip is configured to:

compare the acquired first variation amount of the capacitance signal and the acquired second variation amount of the capacitance signal with at least one of a first capacitance interval or a second capacitance interval,

in response to determining that both the first variation amount of the capacitance signal and the second variation amount of the capacitance signal are within the first capacitance interval: determining that there is no water on an outer surface of the capacitive touch screen, and determining that there is no water ingress risk of the smart terminal; and in response to determining that the first variation amount of the capacitance signal is within the first capacitance interval and the second variation amount of the capacitance signal is within the second capacitance interval: determining presence water on the outer surface of the capacitive touch screen, determining the water ingress risk of the smart terminal, and determining an occurrence time and a duration of the water ingress risk, wherein a variation amount of the capacitance signal within the first capacitance interval is greater than the variation amount of the capacitance signal within the second capacitance interval.

11 . The smart terminal according to claim 10 , wherein the ground wire on the outer surface of the housing is a closed or non-closed ground wire.

12 . The smart terminal according to claim 10 , wherein the chip ground of the capacitive touch screen chip is a grounding pin of the capacitive touch screen chip, or is a grounding wire led out from a grounding pin of the capacitive touch screen chip.

13 . The smart terminal according to claim 10 , wherein the smart terminal further comprises a processor, and under a condition of determining that the smart terminal has the water ingress risk, the capacitive touch screen chip sends a signal to the processor, and the processor gives an alarm to remind a user to wipe off water on the surface of the housing and/or move the smart terminal away from a water source.

Assignments (2)

Priority Claims (1)

Continuity (1)

References Cited (22)