公开(公告)号：WO2020028166A1

公开(公告)日：2020-02-06

申请号：PCT/US2019/043632

申请日：2019-07-26

Applicant: APPLE INC.

Inventor： CHEON, Kwang, Ohk ,  POLYAKOV, Aleksandr, N. ,  LI, Chen-Yue ,  LIN, Chuang-Jung ,  KIM, Kibeom ,  KAO, Nai-Chih ,  LIU, Rui ,  CHANG, Wendi

IPC: H01L51/52

Abstract: A display may have an array of organic light-emitting diode (OLED) pixels (22-1, 22-2) that each have OLED layers (45) interposed between a cathode (54) and an anode (42). Voltage may be applied to the anode (42-1, 42-2) of each pixel (22-1, 22-2) to control the magnitude of emitted light (56). The conductivity of the OLED layers (45) may allow leakage current to pass between neighboring anodes (42-1, 42-2) in the display. To reduce leakage current and cross-talk, the thickness of at least one of the OLED layers (45) may be reduced. To maintain the optical cavity (d opt) of the pixels, transparent optical spacer structures (100-1, 100-2) may be inserted. Alternatively, the thickness of the anodes (42) can be increased. To accommodate a common prime layer within the OLED layers (45), the optical spacers (100-1, 100-2) or anodes (42-1, 42-2) may be separately patterned to have different thicknesses. Grating structures (71) and photonic crystal structures (1250) may be embedded as part of the optical spacers (100) to help control emission at selected viewing angles.