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]
 Official Rezence logo, representing the wireless charging standard and the Alliance for Wireless Power (A4WP) | |
| First published | 2012 |
|---|---|
| Organization | WiPower |
| License | Open standard |
| Copyright | Logo and trademark |
| Website | rezence |
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- ^ "Alliance for Wireless Power (A4WP) Announces the Expansion of the Rezence™ Standard to 50 Watts to Include Tablets, PCs and Peripherals". MarketWatch. PR Newswire.
- ^ "A4WP Rezence Wireless Power". YouTube.
- ^ "Rezence Technical Specification". Rezence.com.
- ^ "Bluetooth Based Wireless Charging – Rezence (A4WP)". Wireless Outlook.
- ^ "A4WP Board Members". Rezence.
- ^ "IDT Joins the Alliance for Wireless Power to Assist in Propagation of Innovative Wireless Power Solutions". IDT.com.
- ^ "Intel joins Alliance for Wireless Power's Board of Directors". Engadget.
- ^ "Intel joins A4WP, a newcomer to wireless power standards". Cnet.
- ^ "Samsung, Qualcomm start up Alliance for Wireless Power to take on Qi". Engadget.
- ^ "WiTricity Joins Alliance for Wireless Power (A4WP)". Yahoo Finance.
- ^ "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