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:
Jul. 27, 2021
Filed:
Sep. 18, 2018
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen, CN;
Bobiao Chang, Shenzhen, CN;
Abstract
The present invention teaches a DC boost circuit and method. The circuit includes an inductor, a diode, a first capacitor, a first FET, a first voltage conversion unit, a voltage drop detection module, a reference voltage adjustment module, and a control module. After a load is connected, the voltage drop detection module obtains a current flowing through the diode and outputs a corresponding second voltage to the reference voltage adjustment module, causing an output voltage from the reference voltage adjustment module greater than an original reference voltage. The control module controls the first FET to increase a ratio of its conduction interval to its cutoff interval in a cycle of conduction and cutoff, thereby increasing the output voltage to compensate the voltage drop resulted from the impedance between the DC boost circuit and the load. The output voltage is therefore ensured to have a stable level.