公开(公告)号：US11114028B2

公开(公告)日：2021-09-07

申请号：US16716125

申请日：2019-12-16

Applicant: LG Display Co., Ltd.

Inventor： Munchae Yoon ,  Sungwon Lee ,  Sungwook Choi

IPC: G09G3/3233 ,  G09G3/3291

Abstract: The present disclosure provides a display device capable of determining the characteristics of the light emitting diode without having to consider various factors dependent upon the manufacturing process. The light emitting diode includes an internal resistor and a parasitic capacitor. The light emitting diode is connected to a sensing circuit including an integrator that has a sensing resistor and a feedback capacitor. Based on a first sensing of a pixel along a first sensing path and a second sensing of the pixel along the second sensing path, the sensing circuit senses a first charge amount from the first sensing path and a second charge amount from the second sensing path. The characteristics of the light emitting diode can be determined by dividing the first charge amount and the second charge amount, which is based on the ratio of the sensing resistor and the internal resistor.

公开(公告)号：US11030954B2

公开(公告)日：2021-06-08

申请号：US16689014

申请日：2019-11-19

Applicant: LG Display Co., Ltd.

Inventor： Sungwook Choi ,  Yiyeon Hwang ,  Munchae Yoon ,  Jongsin Park ,  Sungwon Lee

IPC: G09G3/3241 ,  G09G3/3258

Abstract: Embodiments are directed to a display device having a display panel, a driving circuit, a sensing circuit, and a compensation circuit. The driving circuit provides a preset sensing voltage to a pixel of the display panel. The sensing circuit senses a pixel current generated by the pixel. The sensing circuit includes a sensing circuit that generates an integrated voltage signal indicative of the pixel current, and an offset circuit for adding an offset to the integrated voltage signal. The offset is based on a previously stored compensation amount for the pixel. The compensation circuit determines a new compensation amount for the pixel based on the offset integrated voltage. Additionally, the compensation circuit compensates a display voltage of the pixel by the new compensation amount in a subsequent display frame of the display device.