Dynamic proximity object detection

Patent metadata

Field	Value
Publication number	US-2019018539-A1
Application number	US-201715649535-A
Country	US
Kind code	A1
Filing date	Jul 13, 2017
Priority date	Jul 13, 2017
Publication date	Jan 17, 2019
Grant date	—

Abstract

A method of dynamically adjusting a sensitivity of sensor electrodes configured for capacitive sensing in a sensing region of an input device. The input device detects a first input in the sensing region, and acquires force information about the first input via one or more force sensors coupled to the sensing region. The input device dynamically adjusts a sensitivity of the sensor electrodes based at least in part on an amplitude and duration of the force. In some aspects, the input device may increase the sensitivity of the sensor electrodes when a force of the first input exceeds a force threshold for at least a first threshold duration. In some other aspects, the input device may restore the sensitivity of the sensor electrodes to a prior configuration when no input is detected in the sensing region for at least a second threshold duration.

First claim

1 . An input device comprising:
a plurality of sensor electrodes configured for capacitive sensing in a sensing region of the input device; one or more force sensors coupled to the sensing region; processing circuitry; and a memory storing instructions that, when executed by the processing circuitry, cause the input device to:
detect a first input in the sensing region;
determine a force of the first input based on force information received via the one or more force sensors; and
dynamically adjust a sensitivity of the plurality of sensor electrodes based at least in part on whether an amplitude of the force exceeds a force threshold for at least a first threshold duration.

2 . The input device of claim 1 , wherein execution of the instructions further causes the input device to:
detect that a trigger condition is satisfied, at least in part, when the amplitude of the force exceeds the force threshold for at least the first threshold duration.

3 . The input device of claim 2 , wherein execution of the instructions to dynamically adjust the sensitivity of the plurality of sensor electrodes causes the input device to:
increase the sensitivity of the plurality of sensor electrodes when the trigger condition is satisfied.

4 . The input device of claim 3 , wherein the execution of the instructions to dynamically adjust the sensitivity of the plurality of sensor electrodes further causes the input device to:
restore the sensitivity of the plurality of sensor electrodes to a prior configuration when no input is detected in the sensing region for at least a second threshold duration.

5 . The input device of claim 2 , wherein execution of the instructions further causes the input device to:
acquire capacitive sensing information about the first input via the plurality of sensor electrodes; and determine, based on the capacitive sensing information, that a capacitive property of the first input is below a capacitive threshold.

6 . The input device of claim 5 , wherein the capacitive threshold is associated with a capacitive property of a gloved finger.

7 . The input device of claim 5 , wherein the trigger condition is satisfied when the amplitude of the force exceeds the force threshold for at least the first threshold duration and the capacitive property of the first input is below the capacitive threshold.

8 . The input device of claim 5 , wherein execution of the instructions to dynamically adjust the sensitivity of the plurality of sensor electrodes causes the input device to:
determine a capacitive sensing baseline for one or more of the sensor electrodes, when the trigger condition is satisfied, based at least in part on the capacitive sensing information about the first input.

9 . The input device of claim 2 , wherein execution of the instructions to dynamically adjust the sensitivity of the plurality of sensor electrodes causes the input device to:
request a second input from a user of the input device when the trigger condition is satisfied; and adjust the sensitivity of the plurality of sensor electrodes upon receiving the second input.

10 . The input device of claim 9 , wherein execution of the instructions to dynamically adjust the sensitivity of the plurality of sensor electrodes further causes the input device to:
acquire capacitive sensing information about the second input via the plurality of sensor electrodes; and determine a capacitive sensing baseline for one or more of the sensor electrodes based at least in part on the capacitive sensing information about the second input.

11 . A method of operating an input device, comprising:
detecting a first input in a sensing region of the input device; determining a force of the first input based on force information received via the one or more force sensors; and dynamically adjusting a sensitivity of a plurality of sensor electrodes based at least in part on whether an amplitude of the force exceeds a force threshold for at least a first threshold duration, wherein the plurality of sensor electrodes is configured for capacitive sensing in the sensing region.

12 . The method of claim 11 , further comprising:
detecting that a trigger condition is satisfied, at least in part, when the amplitude of the force exceeds the force threshold for at least the first threshold duration.

13 . The method of claim 12 , wherein the dynamically adjusting comprises:
increase the sensitivity of the plurality of sensor electrodes when the trigger condition is satisfied.

14 . The method of claim 13 , wherein the dynamically adjusting further comprises:
restoring the sensitivity of the plurality of sensor electrodes to a prior configuration when no input is detected in the sensing region for at least a second threshold duration.

15 . The method of claim 12 , further comprising:
acquiring capacitive sensing information about the first input via the plurality of sensor electrodes; and determining, based on the capacitive sensing information, that a capacitive property of the first input is below a capacitive threshold.

16 . The method of claim 15 , wherein the trigger condition is satisfied when the amplitude of the force exceeds the force threshold for at least the first threshold duration and the capacitive property of the first input is below the capacitive threshold.

17 . The method of claim 15 , wherein the dynamically adjusting comprises:
determining a capacitive sensing baseline for one or more of the sensor electrodes, when the trigger condition is satisfied, based at least in part on the capacitive sensing information about the first input.

18 . The method of claim 12 , wherein the dynamically adjusting comprises:
requesting a second input from a user of the input device when the trigger condition is satisfied; and adjusting the sensitivity of the plurality of sensor electrodes upon receiving the second input.

19 . The method of claim 18 , wherein the dynamically adjusting further comprises:
acquiring capacitive sensing information about the second input via the plurality of sensor electrodes; and determining a capacitive sensing baseline for one or more of the sensor electrodes based at least in part on the capacitive sensing information about the second input.

20 . A non-transitory computer-readable medium storing instructions that, when executed by processing circuitry of an input device, cause the input device to perform operations comprising:
detecting a first input in a sensing region of the input device; determining a force of the first input based on force information received via the one or more force sensors; and dynamically adjusting a sensitivity of a plurality of sensor electrodes based at least in part on whether an amplitude of the force exceeds a force threshold for at least a first threshold duration, wherein the plurality of sensor electrodes is configured for capacitive sensing in the sensing region.

Assignees

• Synaptics Inc

Inventors

• Zhong Yuan
• Srinivasan Umha Mahesh

Classifications

• G06F2203/04105

  Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position · CPC title

• G06F2203/04108

  Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F3/0418 Primary

  for error correction or compensation, e.g. based on parallax, calibration or alignment · CPC title

• G06F3/0446 Primary

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title