High speed link for rotating display
First Claim
1. A wireless high-speed data link for interconnecting a stationary data device and a rotating data device, the data link comprising:
- A. a first group of interdigitated conductive elements on the stationary device; and
B. a second group of interdigitated conductive elements on the rotating device;
wherein;
C. the first and second groups together include a first set of conductive elements, each conductive element of the first set from the first group being positioned closely adjacent a corresponding conductive element of the first set from the second group to form a capacitor that establishes a signal path interconnecting the data devices and that has a capacitance that is substantially constant with rotation of the rotating device, the first set of conducting devices establishing a plurality of signal paths;
D. the first and second groups together include a second set of conductive elements, each conductive element of the second set from the first group being positioned closely adjacent a corresponding conductive element of the second set from the second group to form a capacitor that establishes a ground-return path interconnecting the data devices and that has a capacitance that is substantially constant with rotation of the rotating device; and
E. a conductive element of the second set is disposed intermediate each pair of successive conductive elements of the first set.
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Accused Products
Abstract
A data line comprising a stationary disk (34) and an opposed rotating disk (36) couples data from a stationary data source (30) to a rotating data module (12) to which the rotating disk (36) is fixed. The rotating disk (36) includes an insulating substrate (38) on which concentric arcuate strips (40) are formed in registration with corresponding strips on the stationary disk (36). The link transmits data from one disc (34) to the other (36) by capacitive coupling between corresponding strips to the two discs. The several pairs of corresponding strips are in separate parallel data channels, and crosstalk between the channels is prevented by intermediate ground strips (42) disposed between the data-carrying strips (40).
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Citations
5 Claims
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1. A wireless high-speed data link for interconnecting a stationary data device and a rotating data device, the data link comprising:
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A. a first group of interdigitated conductive elements on the stationary device; and B. a second group of interdigitated conductive elements on the rotating device;
wherein;C. the first and second groups together include a first set of conductive elements, each conductive element of the first set from the first group being positioned closely adjacent a corresponding conductive element of the first set from the second group to form a capacitor that establishes a signal path interconnecting the data devices and that has a capacitance that is substantially constant with rotation of the rotating device, the first set of conducting devices establishing a plurality of signal paths; D. the first and second groups together include a second set of conductive elements, each conductive element of the second set from the first group being positioned closely adjacent a corresponding conductive element of the second set from the second group to form a capacitor that establishes a ground-return path interconnecting the data devices and that has a capacitance that is substantially constant with rotation of the rotating device; and E. a conductive element of the second set is disposed intermediate each pair of successive conductive elements of the first set. - View Dependent Claims (2, 3, 4, 5)
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Specification