公开(公告)号：US20230057334A1

公开(公告)日：2023-02-23

申请号：US17824787

申请日：2022-05-25

Applicant: Apple Inc.

Inventor： Young Cheol Yang ,  Bhadrinarayana Lalgudi Visweswaran ,  Michelle C. Sherrott ,  Fuyi Yang

IPC: H01L51/52 ,  H01L27/32

Abstract: The circular polarizer may be omitted from a display to increase efficiency. A polarizer-free display may use other non-polarizer techniques to mitigate reflections of ambient light and mitigate diffraction reflection artifacts. The polarizer-free display may include a black pixel definition layer that absorbs ambient light. Color filter elements may be included in a black matrix to mitigate ambient light reflections. An intra-anode phase shift layer and/or an inter-anode phase shift layer may be included in the display to mitigate diffractive reflection artifacts. Multiple sub-pixels of the same color may be used in a single pixel to ensure a neutral reflection color. The display may include a cathode layer that is patterned to have openings over the black pixel definition layer to mitigate reflections. The display may include diffusive particles (in the color filter element or in a separate diffuser layer) to mitigate diffractive reflection artifacts.

公开(公告)号：US20220271254A1

公开(公告)日：2022-08-25

申请号：US17569384

申请日：2022-01-05

Applicant: Apple Inc.

Inventor： Niva A. Ran ,  Michelle C. Sherrott ,  Steven J. Brewer ,  Ping Kuen Daniel Tsang ,  KiBeom Kim ,  Hui Lu ,  Siddharth Harikrishna Mohan

IPC: H01L51/52

Abstract: An electronic device may have a display such as an organic light-emitting diode (OLED) display. The OLED display may have an array of OLED pixels that each have OLED layers interposed between a cathode and an anode. The pixels may be microcavity OLED pixels having optical cavities. The optical cavities may be defined by a partially transparent cathode layer and a reflective anode structure. The distance between the partially transparent cathode layer and the reflective anode structure for a pixel may be selected such that light at the wavelength emitted by the pixel forms a standing wave between the anode and the cathode. The standing wave may have only one anti-node and the emissive layer for the pixel may be aligned with that one anti-node. To mitigate short circuits, a roughness reduction layer and/or short-circuit-reducing layer having a high sheet resistance may be formed between the anode the OLED layers.