Sony creates new wiring tech for twisting phones

Sony creates new wiring tech for twisting phones

Summary: The single-wire interface technology makes it possible to run data signals and DC power through one cable, which can replace the dozens of wires used to connect handset bodies and displays

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Sony has developed a technology that allows both data and power transmissions through a single cable, potentially making it easier to build mobile devices with hinges or rotating parts.

The single-wire interface technology, announced on Friday, makes it possible to use one wire rather than dozens of wires when connecting a handset display to the body of a device. The technique allows the bi-directional transmission — at almost a gigabit per second — of video, audio and control signals through the same cable that powers the display.

Sony wiring image

The technology allows the bi-directional transmission through the same cable that powers the display. Credit: Sony

"In recent years, mobile devices have become ever more sophisticated in terms of advanced functionality and high-resolution displays," Sony said in a statement. "As a result, more wiring connections have been used to accommodate the increasing volume of data being transmitted within devices. Accordingly, new problems began to emerge as connectors in devices became larger and it became more difficult to bend the connecting cables.

"Sony aims to promptly implement this technology to improve design flexibility, reliability and durability for mobile devices with movable mechanisms," the company added.

The system uses what Sony says is a unique time-division duplex (TDD) and multiplex method, with the bi-directional aspect of the technology being based on a mechanism that retains the individual synchronisation of display and camera signals, to take two examples.

Sony's demonstration system, which can reach a transmission speed of 940Mbps, has three main elements: a digital portion that performs multilevel encoding, an analogue portion to transmit and receive the signals, and a portion to combine signals with or separate signals from DC power.

The company has teamed up with the Japanese component supplier Rohm to jointly develop the analogue portion of a test chip. Once this has been done, Sony said, it will give Rohm a licence for the intellectual property associated with the digital portion, so the two companies can create a single chip that incorporates all the portions of the single-wire interface technology system.

Sony wiring image

Sony's demonstration system has a digital portion, an analogue portion and a portion to combine signals with or separate signals from DC power. Credit: Sony

Topics: Mobility, Smartphones

David Meyer

About David Meyer

David Meyer is a freelance technology journalist. He fell into journalism when he realised his musical career wouldn't pay the bills. David's main focus is on communications, as well as internet technologies, regulation and mobile devices.

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2 comments
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  • This is a boringly obvious development that goes back to the 1970s (probably further). Even putting the stuff in a pair of chips (one each end) is entirely guessable.
    Tezzer-5cae2
  • I agree with Tezzer, there is nothing new in this, very old technology that has been available as single modules on each end of a single signal path for years. This is how the whole public telephone system works. I suppose it may be novel to use it in a mobile phone but hardly worth a big announcement.
    pround-bf9cc