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:
Jan. 22, 2019
Filed:
Jan. 09, 2017
Samsung Display Co., Ltd., Yongin-si, Gyeonggi-do, KR;
Anup P. Jose, San Jose, CA (US);
Amir Amirkhany, Sunnyvale, CA (US);
Samsung Display Co., Ltd., Yongin-si, KR;
Abstract
A column driver includes: an output stage including: a first transistor and a second transistor coupled in series between an output high voltage source and an output low voltage source; and an output node between the first transistor and the second transistor, the first transistor and the second transistor being configured to control an output voltage of the output node in an output voltage range; a first operational amplifier having a first operating voltage range, an output of the first operational amplifier being connected to a gate electrode of the first transistor, the first operating voltage range being smaller than the output voltage range; a second operational amplifier having a second operating voltage range, an output of the second operational amplifier being connected to a gate electrode of the second transistor; and a feedback network coupled between the output node and non-inverting inputs of the first and second operational amplifiers.