公开(公告)号：US09741283B2

公开(公告)日：2017-08-22

申请号：US14857274

申请日：2015-09-17

Applicant: LG DISPLAY CO., LTD.

Inventor： Juseok Lee

IPC: G09G5/00 ,  G09G3/20 ,  G09G3/00 ,  G09G3/3225 ,  H05B33/08 ,  G09G3/3208 ,  H02H3/087 ,  G01R19/00 ,  G01R31/26

CPC classification number: G09G3/2092 ,  G01R19/0092 ,  G01R31/2635 ,  G09G3/006 ,  G09G3/3208 ,  G09G3/3225 ,  G09G2330/025 ,  G09G2330/028 ,  G09G2330/04 ,  G09G2330/045 ,  G09G2330/12 ,  H02H3/087 ,  H05B33/089

Abstract: Disclosed is to an over-current control device and an organic light emitting display device adopting a function of interrupting an over-current. To provide an over-current control device and a OLED device using the same, which allow a fast and reliable detection of an over-current, an over-current control device for detecting an over-current provided to an OLED is provided, comprising: an over-current identification unit adapted to compare a driving voltage on a supply line for driving the OLED with a reference voltage on a reference voltage line for identifying the over-current; an interruption unit connected between the supply line supplying the driving voltage and the pixel including the OLED for interrupting the power supply if the over-current identification unit recognizes an over-current flowing through the supply line.

公开(公告)号：US10347186B2

公开(公告)日：2019-07-09

申请号：US15714745

申请日：2017-09-25

Applicant: LG Display Co., Ltd.

Inventor： Juseok Lee ,  HaeSeung Lee

IPC: G09G3/3258 ,  G09G3/20 ,  G09G3/3266 ,  G09G3/3291 ,  G09G3/3233 ,  H03K19/21

Abstract: A display panel driving unit can include: a timing controller to supply a power on reset signal for starting a sensing operation for pixel compensation during a sensing period before displaying an image; a power management integrated circuit (PMIC) to supply a high level reference voltage reset signal to the timing controller, and generate a control signal; and a control circuit to receive the high level reference voltage reset signal and the PMIC, in response to the high level reference voltage reset signal transitioning from a high to low logic level and then from the low logic level back to the high logic level, shift the power on reset signal to transition from a high to low logic level and then from the low logic level back to high, to follow the high level reference voltage reset signal, and supply the power on reset signal to the timing controller.

公开(公告)号：US10964266B2

公开(公告)日：2021-03-30

申请号：US16539840

申请日：2019-08-13

Applicant: LG Display Co., Ltd.

Inventor： Juseok Lee

IPC: G09G3/32 ,  G09G3/3258 ,  G09G3/3233 ,  G05F1/571

Abstract: A drive voltage supply circuit, a display panel, and a display device are provided. By supplying a drive voltage lower than a drive voltage for display driving in a period in which sensing deterioration of an organic light emitting diode disposed in each sub pixel, an operating voltage of the organic light emitting diode is kept constant and a degree of deterioration of the organic light emitting diode can be accurately sensed. By discharging the drive voltage supplied to the display panel and controlling a current flowing in the process of discharge before supplying the drive voltage for deterioration sensing, drive voltages of different levels can be stably supplied in a display driving period and a deterioration sensing period.

公开(公告)号：US20200074930A1

公开(公告)日：2020-03-05

申请号：US16539840

申请日：2019-08-13

Applicant: LG Display Co., Ltd.

Inventor： Juseok Lee

IPC: G09G3/3258 ,  G09G3/3233 ,  G05F1/571

Abstract: A drive voltage supply circuit, a display panel, and a display device are provided. By supplying a drive voltage lower than a drive voltage for display driving in a period in which sensing deterioration of an organic light emitting diode disposed in each sub pixel, an operating voltage of the organic light emitting diode is kept constant and a degree of deterioration of the organic light emitting diode can be accurately sensed. By discharging the drive voltage supplied to the display panel and controlling a current flowing in the process of discharge before supplying the drive voltage for deterioration sensing, drive voltages of different levels can be stably supplied in a display driving period and a deterioration sensing period.