Doppelpufferschaltung, Gammaspannungserzeugungsschaltung damit und Datentreiberschaltung

Details

Veröffentlichungs-Nr.

EP4822680

Anmeldetag

6. Dezember 2024

Veröffentlichung

12. Juni 2025

Rechtsraum

EP

IPC

G09G3/20

Abstract

The present invention relates to a dual buffer circuit capable of removing an offset voltage and a gamma voltage generation circuit and a data driver circuit each including the same, and the dual buffer circuit according to an embodiment may include a first buffer circuit and a second buffer circuit connected in parallel between an input terminal and an output terminal, and each of the first buffer circuit and the second buffer circuit may include an operational amplifier, a chopping switching unit, and a switch unit. The first buffer circuit and the second buffer circuit may perform an operation of at least one mode among a chopping mode and an auto-zero mode. When the first buffer circuit and the second buffer circuit operate in the auto-zero mode, the first buffer circuit and the second buffer circuit may alternately perform a sampling period sampling an offset in the auto-zero mode and a holding period compensating for the offset.

Anmelder

Firma

LX Semicon Co., Ltd.

Land

🇰🇷 Südkorea

Fachgebiete