Input system for portable electronic device

1 . An electronic device comprising:

an enclosure comprising:

a front cover defining a front exterior surface of the electronic device; and

a housing component coupled to the front cover and defining a side exterior surface of the electronic device;

an input button system comprising:

an input member positioned along the side exterior surface of the housing component and configured to receive a force input;

a beam structure at least partially within the enclosure, the beam structure configured to be deflected as a result of the force input on the input member;

a first strain sensing element at a first location of the beam structure; and

a second strain sensing element at a second location of the beam structure;

a processing system coupled to the first strain sensing element and the second strain sensing element and configured to:

determine a location of the force input on the input member based at least in part on at least one of a first signal from the first strain sensing element or a second signal from the second strain sensing element; and

cause the electronic device to perform a first operation in response to detecting, based at least in part on at least one of the first signal from the first strain sensing element or the second signal from the second strain sensing element, that the force input satisfies a first force threshold; and

a dome switch configured to collapse in response to the force input satisfying a second force threshold greater than the first force threshold, the electronic device configured to perform a second operation in response to detecting the collapse of the dome switch.

2 . The electronic device of claim 1 , wherein:

the electronic device further comprises a haptic actuation system;

the processing system is configured to cause the haptic actuation system to produce a first tactile output in response to detecting that the force input satisfies the first force threshold; and

the dome switch produces a second tactile output when collapsed in response to the force input satisfying the second force threshold.

3 . The electronic device of claim 1 , wherein:

the dome switch is positioned below the beam structure; and

the dome switch is partially deformed by the beam structure in response to the force input.

4 . The electronic device of claim 1 , wherein:

the electronic device further includes:

a camera; and

a display configured to display graphical user interfaces; and

the first operation includes causing the display to transition to a graphical user interface associated with an image capture function; and

the second operation includes capturing an image when the display is not displaying the graphical user interface associated with the image capture function.

5 . The electronic device of claim 4 , wherein the processing system is configured to:

in accordance with a determination that the force input was applied to a first region of the input member, cause the electronic device to perform a third operation; and

in accordance with a determination that the force input was applied to a second region of the input member, cause the electronic device to perform a fourth operation.

6 . The electronic device of claim 5 , wherein:

the third operation includes a zoom-in operation; and

the fourth operation includes a zoom-out operation.

7 . The electronic device of claim 1 , wherein:

the first force threshold is between about 0.8 Newtons and about 1.2 Newtons; and

the second force threshold is between about 3.0 Newtons and about 4.0 Newtons.

8 . The electronic device of claim 1 , wherein:

the dome switch is coupled to the beam structure; and

force from the force input is transferred to the beam structure via the dome switch.

9 . A portable electronic device comprising:

a touchscreen display;

a battery; and

an enclosure enclosing the touchscreen display and the battery, the enclosure comprising:

a front cover positioned over the touchscreen display and defining a front exterior surface of the enclosure; and

a housing component coupled to the front cover and defining an opening along a side exterior surface of the enclosure; and

an input button system comprising:

a beam structure at least partially within the enclosure and comprising:

a first compliant segment positioned proximate a first end of the beam structure; and

a second compliant segment positioned proximate a second end of the beam structure;

a first strain sensing element coupled to the first compliant segment;

a second strain sensing element coupled to the second compliant segment;

a switch element positioned proximate a central region of the beam structure, the central region of the beam structure between the first end and the second end of the beam structure; and

an input member positioned at least partially in the opening and configured to impart a force on the beam structure and on the switch element as a result of a force input applied to the input member; and

a processing system configured to, in accordance with a determination that the force input satisfies a force threshold, cause the portable electronic device to perform an operation, the determination based at least in part on at least one of a first signal from the first strain sensing element or a second signal from the second strain sensing element, wherein the force threshold is less than an actuation force of the switch element.

10 . The portable electronic device of claim 9 , wherein the processing system is configured to determine a region on the input member where the force input was applied based at least in part on at least one of the first signal from the first strain sensing element or the second signal from the second strain sensing element.

11 . The portable electronic device of claim 9 , wherein:

the portable electronic device further comprises a haptic actuation system;

the processing system is configured to cause the haptic actuation system to produce a first tactile output in response to detecting that the force input satisfies the force threshold; and

the switch element produces a second tactile output when the switch element is actuated.

12 . The portable electronic device of claim 9 , wherein:

the operation includes causing the touchscreen display to transition to a graphical user interface associated with an image capture function; and

the portable electronic device is further configured to capture an image in response to the switch element being actuated when the touchscreen display is not displaying the graphical user interface associated with the image capture function.

13 . The portable electronic device of claim 12 , wherein the processing system is further configured to determine a swipe direction of a swipe input applied to the input member based at least in part on a third signal from the first strain sensing element and a fourth signal from the second strain sensing element, the swipe input including a swipe gesture extending along a surface of the input member.

14 . The portable electronic device of claim 13 , wherein the portable electronic device is configured to:

perform a zoom-in operation in response to determining that the swipe direction is a first direction; and

perform a zoom-out operation in response to determining that the swipe direction is a second direction opposite the first direction.

15 . The portable electronic device of claim 9 , wherein a difference between the force threshold and the actuation force is between about 0.5 Newtons and about 1.5 Newtons.

16 . An electronic device comprising:

a housing component defining a side exterior surface;

a front cover coupled to the housing component;

a display positioned below the front cover;

a haptic actuation system;

an input member positioned along the side exterior surface of the housing component and configured to receive a force input;

a beam structure at least partially within the electronic device, the beam structure configured to be deflected as a result of the force input on the input member;

a first strain sensing element at a first location of the beam structure;

a second strain sensing element at a second location of the beam structure;

a processing system coupled to the first strain sensing element and the second strain sensing element and configured to:

based at least in part on at least one of a first signal from the first strain sensing element or a second signal from the second strain sensing element, determine that the force input satisfies a first force threshold; and

in response to determining that the force input satisfies the first force threshold, cause the haptic actuation system to produce a first tactile output; and

a dome switch configured to collapse in response to the force input satisfying a second force threshold, thereby producing a second tactile output, the second force threshold greater than the first force threshold.

17 . The electronic device of claim 16 , wherein:

the input member defines:

a first input region at a first end of the input member; and

a second input region at a second end of the input member opposite the first end; and

the processing system is further configured to determine whether the force input was applied to the first input region of the input member or the second input region of the input member based at least in part on the first signal from the first strain sensing element or the second signal from the second strain sensing element.

18 . The electronic device of claim 17 , wherein:

the electronic device further includes a camera; and

the processing system is further configured to:

in response to determining that the force input satisfies the first force threshold and was applied to the first input region of the input member, perform a zoom-in operation;

in response to determining that the force input satisfies the first force threshold and was applied to the second input region of the input member, perform a zoom-out operation; and

in response to the dome switch collapsing, capture an image with the camera.

19 . The electronic device of claim 16 , wherein the haptic actuation system is configured to produce a third tactile output in response to a touch input applied to the front cover.

20 . The electronic device of claim 16 , wherein the dome switch is positioned on the beam structure and the force input is imparted to the beam structure via the dome switch.