公开(公告)号：US20190207140A1

公开(公告)日：2019-07-04

申请号：US16137214

申请日：2018-09-20

Applicant: LG Display Co., Ltd.

Inventor： Dongyoon LEE ,  Inyeong KONG ,  Jongsin PARK

IPC: H01L51/52 ,  H01L27/12 ,  H01L27/146

CPC classification number: H01L51/5203 ,  H01L27/1214 ,  H01L27/14621 ,  H01L51/5237

Abstract: An organic light-emitting diode (OLED) display device capable of improving light extraction efficiency and lifetime is disclosed. In the OLED display device, a protective layer having a convex shaped protruding pattern is arranged in a light emitting area at a central portion of a substrate, so that only the light emitting area has a selectively convex protruding shape. Accordingly, in the OLED display device, in a process of forming an organic light emitting layer, the protruding pattern can artificially offset the organic light emitting layer arranged at the central portion of the substrate being sagged, by a protective layer having a convex shaped protruding pattern. As a result, the OLED display device can improve a problem of thickness non-uniformity of the central portion and an edge portion of the substrate due to a sagging phenomenon of the organic light emitting layer.

公开(公告)号：US20200175921A1

公开(公告)日：2020-06-04

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.