公开(公告)号：US20180308448A1

公开(公告)日：2018-10-25

申请号：US15904722

申请日：2018-02-26

Applicant: Samsung Display Co., Ltd.

Inventor： Jongjae LEE ,  Dae-sik LEE ,  Yanguk NAM ,  Yoomi KIM ,  Songyi HAN

IPC: G09G3/36 ,  H03K5/1252 ,  H03K5/24

CPC classification number: G09G3/3696 ,  G09G2330/04 ,  G09G2330/12 ,  H03K5/1252 ,  H03K5/24 ,  H03K21/08

Abstract: A voltage generation circuit of a display device includes an over-current detection circuit that provides a driving voltage to a voltage terminal and outputs an over-current detection signal. The over-current detection circuit includes a current detector that outputs a detection signal at a first level when a voltage corresponding to an output current flowing through the voltage terminal during a blank period, in which a blank signal is activated, is lower than a first reference level or higher than a second reference level, a glitch remover that outputs a noise detection signal when a time period in which the detection signal is maintained at the first level is longer than a reference maintenance time, and a noise filter that activates the over-current detection signal when the noise detection signal is activated at least twice during a predetermined time period.