Steven T Brewer

US Patent:

20220271254, Aug 25, 2022

Filed:

Jan 5, 2022

Appl. No.:

17/569384

Inventors:

- Cupertino CA, US
Michelle C. Sherrott - Santa Clara CA, US
Steven J. Brewer - Atlanta GA, US
Ping Kuen Daniel Tsang - Taoyuan, TW
KiBeom Kim - Cupertino CA, US
Hui Lu - Cupertino CA, US
Siddharth Harikrishna Mohan - Aurora IL, US

International Classification:

H01L 51/52

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.