Browse Definitions :
Definition

Qi (Wireless Power Consortium)

Qi (pronounced CHEE) is a manufacturer-agnostic standard for wirelessly charging small, battery-powered devices. Qi, which means life energy in Chinese, was developed and is maintained by the Wireless Power Consortium, a group of manufacturers that includes Apple, Dell, LG Electronics and Verizon Wireless. 

The Qi standard ensures that any device that meets Qi specifications can be charged by being placed on any charging surface that meets Qi specifications, regardless of the device's manufacturer or brand. The Qi charging surface transfers the required energy to the compatible battery-powered device through electromagnetic induction

The Serbian-American scientist Nikola Tesla first observed electromagnetic induction in the latter part of the 19th century. He noticed that when a strong alternating current (AC) passed through a coil of wire, a nearby coil acquired a weaker AC at the same frequency, even when the two coils were not physically connected. The extent of this effect depends on the distance between the coils and also on their relative positioning. 

The Qi standard permits the transmitting coil and the receiving coil to be positioned two different ways: guided positioning and free positioning. Guided positioning requires the end user to place the battery-powered device in direct alignment with the transmitting coil. Close spacing of the two coils, as well as shielding on their surfaces, ensures the inductive power transfer is efficient. Free positioning bundles coils in a charging pad to generate a magnetic field around the battery-powered device. This way gives the charging device a workable service over separations as far as 15cm, which has made it easier for retailers and transportation service providers to embed charging surfaces in such things as counter surfaces, furniture and lamp bases.

The Qi standard competes with AirFuel, a proposed standard overseen by the AirFuel Alliance. The AirFuel Alliance was formed by the merger of the Alliance for Wireless Power (AW4P) and the Power Matters Alliance (PMA); its members include AT&T, Samsung and Intel. Both the Wireless Power Consortium and the AirFuel Alliance are experimenting with inductive charging, resonance charging and radio charging to provide mobile end users with ubiquitous charging. In such a scenario, an end user's device might issue a permission-based alert indicating the availability of wireless charging.

This was last updated in February 2017

Continue Reading About Qi (Wireless Power Consortium)

SearchCompliance

  • information governance

    Information governance is a holistic approach to managing corporate information by implementing processes, roles, controls and ...

  • enterprise document management (EDM)

    Enterprise document management (EDM) is a strategy for overseeing an organization's paper and electronic documents so they can be...

  • risk assessment

    Risk assessment is the identification of hazards that could negatively impact an organization's ability to conduct business.

SearchSecurity

  • unified threat management (UTM)

    Unified threat management (UTM) describes an information security (infosec) system that provides a single point of protection ...

  • physical security

    Physical security is the protection of personnel, hardware, software, networks and data from physical actions and events that ...

  • attack vector

    An attack vector is a path or means by which an attacker or hacker can gain access to a computer or network server in order to ...

SearchHealthIT

SearchDisasterRecovery

  • risk mitigation

    Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a business.

  • call tree

    A call tree is a layered hierarchical communication model that is used to notify specific individuals of an event and coordinate ...

  • Disaster Recovery as a Service (DRaaS)

    Disaster recovery as a service (DRaaS) is the replication and hosting of physical or virtual servers by a third party to provide ...

SearchStorage

  • cloud storage

    Cloud storage is a service model in which data is transmitted and stored on remote storage systems, where it is maintained, ...

  • cloud testing

    Cloud testing is the process of using the cloud computing resources of a third-party service provider to test software ...

  • storage virtualization

    Storage virtualization is the pooling of physical storage from multiple storage devices into what appears to be a single storage ...

Close