The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 2019
Filed:
Mar. 29, 2017
Shenzhen China Star Optoelectronics Technology Co., Ltd., Shenzhen, Guangdong, CN;
Wendong Li, Guangdong, CN;
Shenzhen China Star Optoelectronics Technology Co., Ltd., Shenzhen, Guangdong, CN;
Abstract
Provided is a backlight driving circuit, comprising voltage conversion circuit, PMW controller, zener diode, first electrical switch, optocoupler unit, boost switch and light source drive assembly. The PMW controller controls an output of the voltage conversion circuit. The light source drive assembly is connected to the boost switch and a light source to control on and off of the boost switch. A cathode of the zener diode is connected to the optocoupler unit, and an anode of the zener diode is connected to a control end of the first electric switch, and a first end of the first electrical switch is connected to the PWM controller, and a second end of the first electrical switch is grounded, and as the boost switch is short, a current outputted by the voltage conversion circuit increases, and the optocoupler unit breaks the zener diode down.