Patent Number: 9,433,056

Title: Light string having at least one protecting circuit

Abstract: The present invention provides a light string including at least one light series branch and a protecting circuit connected between the at least one light series branch and an AC power supply. The protecting circuit includes a switching circuit, a sample circuit and a control circuit for switching off the switching circuit and keeping the switching circuit at off-state when the sampled voltage is larger than or equal to a preset voltage, and controlling the switching circuit to turn on and turn off the at least one light series branch. When the number of the failed lamps and removed lamps reaches to a preset number, the current is opened to protecting the reminder light from been burned out. The light string can light on and off alternately like twinkling stars, or the colors can be changed alternately.

Inventors: Ding; Feng (Xiaogan, CN)


International Classification: H05B 37/00 (20060101); H05B 33/08 (20060101); H05B 37/02 (20060101)

Expiration Date: 2020-08-30 0:00:00