公开(公告)号：US20220208058A1

公开(公告)日：2022-06-30

申请号：US17542583

申请日：2021-12-06

Applicant: LG DISPLAY CO., LTD.

Inventor： Sujin HWANG ,  MiYoung SON ,  EungKyu KIM ,  HongJae SHIN ,  MinKyu CHANG

IPC: G09G3/20

Abstract: A display device includes a level shifter and a gate driving circuit that can reduce differences in characteristics among gate signals to improve image quality by controlling a signal waveform of a first clock signal of the m number of clock signals different from a signal waveform of an m-th clock signal when m number of gate signals is output by using m number of clock signals.

公开(公告)号：US20170162119A1

公开(公告)日：2017-06-08

申请号：US15367583

申请日：2016-12-02

Applicant: LG DISPLAY CO., LTD.

Inventor： EungKyu KIM ,  YongKyu PARK ,  Seokyu JANG

IPC: G09G3/3258 ,  G09G3/3266 ,  G09G3/3275 ,  H01L27/32

CPC classification number: G09G3/3258 ,  G09G3/3233 ,  G09G3/3266 ,  G09G3/3275 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2310/08 ,  G09G2320/0214 ,  G09G2320/0223 ,  G09G2320/0233 ,  G09G2320/0295 ,  G09G2320/043 ,  G09G2330/021 ,  H01L27/3262 ,  H01L27/3265 ,  H01L27/3276

Abstract: A display device includes a switching circuit; a sub-pixel having a driving transistor and an organic light emitting diode (OLED) with an anode connected to the driving transistor; a driving voltage supply line to supply a driving voltage to the OLED through the driving transistor; a base voltage supply line connected to a cathode of the OLED through the switching circuit; a ground line to supply a ground voltage to the switching circuit; a first capacitor between the driving voltage supply line and the ground line; and a second capacitor between the base voltage supply line and the ground line. The switching circuit selectively supplies one of a first level voltage and a second level voltage as the base voltage, and the second level voltage is higher than the first level voltage at the ground voltage.