Rezence (wireless charging standard)

Rezence

Official Rezence logo, representing the wireless charging standard and the Alliance for Wireless Power (A4WP)

First published| 2012; 13 years ago (2012)
Organization| WiPower
License| Open standard
Copyright| Logo and trademark
Website| rezence.com rezence.com/vn88 rezence.com/me88/
Official Rezence brandmark, the A4WP uses this mark of interoperability to show that various devices are compatible with Rezence systems.

Rezence (pronounced reh-zense) was an interface standard developed by the WiPower (A4WP) for wireless electrical power transfer based on the principles of magnetic resonance. The Rezence system consisted of a single power transmitter unit (PTU) and one or more power receiver units (PRUs). The interface standard supported power transfer up to 50 watts,[1] at distances up to 5 centimeters.[2] The power transmission frequency is 6.78 MHz, and up to eight devices could be powered from a single PTU depending on transmitter and receiver geometry and power levels. A Bluetooth Low Energy link was defined in the A4WP system intended for control of power levels, identification of valid loads and protection of non-compliant devices.[3][4]

The A4WP was formed in early 2012 with the intent to create a wireless power transfer standard to compete with the existing Qi standard. Board member companies[5] included Broadcom, Gill Electronics, Integrated Device Technology (IDT),[6] Intel,[7][8] Qualcomm, Samsung Electronics,[9] Samsung Electro-Mechanics, and WiTricity.[10]

In January 2015 A4WP and the Power Matters Alliance announced that the two organizations intended to merge into the AirFuel Alliance.[11]

## See also

[edit]

* Cordless
* WiPower
* Contactless energy transfer
* Inductive coupling
* Near field communication
* Bluetooth Smart
* Open Dots, a conductive charging standard promoted by Open Dots Alliance

## References

[edit]

1. ^ "Alliance for Wireless Power (A4WP) Announces the Expansion of the Rezence™ Standard to 50 Watts to Include Tablets, PCs and Peripherals". MarketWatch. PR Newswire.
2. ^ "A4WP Rezence Wireless Power". YouTube. 9 January 2014.
3. ^ "Rezence Technical Specification". Rezence.com.
4. ^ "Bluetooth Based Wireless Charging – Rezence (A4WP)". Wireless Outlook.
5. ^ "A4WP Board Members". Rezence.
6. ^ "IDT Joins the Alliance for Wireless Power to Assist in Propagation of Innovative Wireless Power Solutions". IDT.com.
7. ^ "Intel joins Alliance for Wireless Power's Board of Directors". Engadget. 19 June 2013.
8. ^ "Intel joins A4WP, a newcomer to wireless power standards". Cnet.
9. ^ "Samsung, Qualcomm start up Alliance for Wireless Power to take on Qi". Engadget. 8 May 2012.
10. ^ "WiTricity Joins Alliance for Wireless Power (A4WP)". Yahoo Finance.
11. ^ "Alliance for Wireless Power and Power Matters Alliance Agree to Merge" (Press release). Retrieved 25 August 2023.

## External links

[edit]

* Rezence – official site
* Bluetooth Smart – official site of Bluetooth Smart technology