OPTICAL JOG WHEEL WITH SPIRAL CODING ELEMENT
First Claim
1. A user navigational apparatus comprising:
- a dial;
a coding element coupled to the dial, the coding element comprising a track of alternating reflective and non-reflective sections, wherein each of the reflective and non-reflective sections comprises a substantially oblique leading edge relative to a direction of movement of the coding element; and
an encoder comprising an emitter and a detector, the emitter configured to generate a light signal incident on the track of the coding element, the detector configured to detect a reflected light signal reflected off of the reflective sections of the track and to generate a channel signal corresponding to the reflected light signal.
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Accused Products
Abstract
A user navigational apparatus. The user navigational apparatus includes a dial, a coding element, and an encoder. The coding element is coupled to a dial. The coding element includes a track of alternating reflective and non-reflective sections, each having a substantially oblique leading edge relative to a direction of movement of the coding element. The encoder includes an emitter and a detector. The emitter generates a light signal incident on the track of the coding element. The detector detects a reflected light signal which corresponds to a portion of the incident light signal that is reflected off of the reflective sections of the track. The detector also generates a channel signal corresponding to the reflected light signal.
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Citations
20 Claims
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1. A user navigational apparatus comprising:
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a dial; a coding element coupled to the dial, the coding element comprising a track of alternating reflective and non-reflective sections, wherein each of the reflective and non-reflective sections comprises a substantially oblique leading edge relative to a direction of movement of the coding element; and an encoder comprising an emitter and a detector, the emitter configured to generate a light signal incident on the track of the coding element, the detector configured to detect a reflected light signal reflected off of the reflective sections of the track and to generate a channel signal corresponding to the reflected light signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A user navigational apparatus comprising:
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a rotary dial; means for generating a light signal incident on a coded track; means for generating a spiral-shaped light image in response to the light signal incident on the coded track; and means for detecting motion of the coded track, wherein the coded track is configured to move in response to a first user movement of the rotary dial. - View Dependent Claims (15, 16, 17)
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18. A method for making a user navigational apparatus, the method comprising:
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coupling a code wheel to a rotary dial, wherein the code wheel comprises a track of alternating reflective and non-reflective sections, wherein each of the reflective and non-reflective sections comprises a substantially oblique leading edge relative to a direction of movement of the code wheel; mounting an emitter on a circuit substrate relative to the code wheel, the emitter to generate a light signal incident on the track of the code wheel; and mounting a detector on the circuit substrate relative to the code wheel, the detector to detect a reflected spiral-shaped light signal reflected off of the reflective sections of the track and to generate a channel signal corresponding to the reflected light signal. - View Dependent Claims (19, 20)
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Specification