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Electronic Patent Application Fee Transmittal Title of Invention: First Named Inventor/Applicant Name: Paisith P. Boonsom Attorney Docket Number:

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(Currently Amended) A wrist-worn electronic device comprising: a housing: a display positioned at least partially within the housing and configured to depict graphical elements; a crown coupled to the housing and configured to receive a rotational input, the crown comprising: a dial positioned along a side of the housing; and a spindle coupled to the dial and having an array of alternating regions that extend along a length of the spindle; an optical emitter positioned along a side of the spindle and configured to illuminate a portion of the array of alternating regions; and an array of optical detectors arranged along the length of the spindle and configured to detect light reflected off the portion of the array of alternating regions; wherein[[,]] the wrist-worn device is configured to modify the graphical elements of the display in response to the rotational input.

(Previously Presented) The wrist-worn electronic device of claim 35, wherein the graphical elements are moved in accordance with a speed of the rotational input.

(Previously Presented) The wrist-worn electronic device of claim 35, wherein: the wrist-worn electronic device further comprises a diffusing member positioned over the array of optical detectors; and the diffusing member includes an array of elongated lens features that each extend in a direction that is transverse to the length of the spindle.

(Previously Presented) A wearable electronic device comprising: a housing that defines an interior volume; a display positioned at least partially within the interior volume and along a front of the wearable electronic device; a crown comprising: a dial positioned along a side of the wearable electronic device and configured to receive a rotational input; and a shaft coupled to the dial and extending into the interior volume of the housing; and an array of light-reflective regions, each light-reflective region extending along an axial direction of the shaft; an optical emitter positioned along a side of the array of light-reflective regions and configured to illuminate a portion of the array of light-reflective regions; and an optical detector aligned with the optical emitter along the axial direction.

(Previously Presented) The wearable electronic device of claim 40, wherein the optical detector comprises a linear array of photo-detectors that are arranged along the axial direction.

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