Presence sensing method, presence sensing device and light system

US10568184B2 · kind B2 · utility

Assignee

• CONSUMER LIGHTING (U.S.), LLC · US

Inventors

• Dong Xing · Laishui, CN
• Aijun Wang · Davis, US
• Xin Luo · Baldwin Park, US
• Xin Zhou · Shanghai, CN
• Jiyong Zhang · Gangshan Subdistrict, CN
• Charles Shi · Shanghai, CN
• Fanbin Wang · Shanghai, CN

Key dates

• Filing date: Jun 25, 2019
• Grant date: Feb 18, 2020
• Expiry date: Jun 25, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02B20/40
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A presence sensing method for a light comprises detecting a presence of a user by a sensing module having a first sensitivity while the light is off; turning on the light when identifying the presence of the user and keeping the light on for a delay time period which has a preset length; increasing a sensitivity of the sensing module to a second sensitivity after turning on the light; detecting actions of the user by the sensing module having the second sensitivity while the light is on; determining a length of a next delay time period based on the actions of the user during the previous delay time period immediately prior to the next delay time period; and keeping the light on for the next delay time period.