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Unverified80% confidenceTradeoffTime unknown

DP Alt Mode有单向和双向传输之分，部分手机（如三星DeX、华为）通过USB-C投屏时占用4条差分对全部用于视频，此时无法同时以USB 3.0速率传数据，选购需权衡是否需要视频+高速数据并行

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Type-C视频线category

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Unverified三星DeX桌面模式依赖支持DP Alt Mode的USB-C线或Type-C转HDMI，普通充电线无法输出视频信号，选配件时须确认线材支持视频传输协议82% similar Unverified全功能USB-C接口便携屏需支持DP Alt Mode才能单线传输视频+供电，购买前确认设备的USB-C口支持视频输出，否则需外接HDMI且额外供电81% similar Unverified选择支持USB-C单线供电+显示的机型（DP Alt Mode），一根线即可连接手机/轻薄本；若设备USB-C不支持视频输出，则必须选带HDMI接口的型号，购买前务必确认主机接口协议80% similar Unverified主设备只有单个USB-C口且不支持视频输出（DP Alt Mode）时不建议购买，双联便携屏依赖视频输出协议，纯供电口无法点亮屏幕80% similar Unverified选购时需确认笔记本的USB-C口是否支持视频输出（DP Alt Mode），否则无法通过USB-C实现一线通连接78% similar

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