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)

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • California Consumer Privacy Act (CCPA)

    The California Consumer Privacy Act (CCPA) is legislation in the state of California that supports an individual's right to ...

  • compliance audit

    A compliance audit is a comprehensive review of an organization's adherence to regulatory guidelines.

  • regulatory compliance

    Regulatory compliance is an organization's adherence to laws, regulations, guidelines and specifications relevant to its business...

SearchSecurity

  • endpoint detection and response (EDR)

    Endpoint detection and response (EDR) is a category of tools and technology used for protecting computer hardware devices–called ...

  • ransomware

    Ransomware is a subset of malware in which the data on a victim's computer is locked, typically by encryption, and payment is ...

  • single sign-on (SSO)

    Single sign-on (SSO) is a session and user authentication service that permits an end user to enter one set of login credentials ...

SearchHealthIT

SearchDisasterRecovery

  • disaster recovery team

    A disaster recovery team is a group of individuals focused on planning, implementing, maintaining, auditing and testing an ...

  • cloud insurance

    Cloud insurance is any type of financial or data protection obtained by a cloud service provider. 

  • business continuity software

    Business continuity software is an application or suite designed to make business continuity planning/business continuity ...

SearchStorage

  • blockchain storage

    Blockchain storage is a way of saving data in a decentralized network which utilizes the unused hard disk space of users across ...

  • disk mirroring (RAID 1)

    RAID 1 is one of the most common RAID levels and the most reliable. Data is written to two places simultaneously, so if one disk ...

  • RAID controller

    A RAID controller is a hardware device or software program used to manage hard disk drives (HDDs) or solid-state drives (SSDs) in...

Close