Apple Inc.

Themistoklis Afentakis

Shih Chang Chang

Ting-Kuo Chang

Lei Yuan

Doh-Hyoung Lee

Jung Yen Huang

Niva A Ran

Po-Chun Yeh

Jiun-Jye Chang

Chuan-Jung Lin

Ching-Sang Chuang

Caleb Coburn

Tsung-Ting Tsai

Jean-Pierre Simon Guillou

Abbas Jamshidi Roudbari

Chieh-Wei Chen

Shinya Ono

Prashant Mandlik

Jae Won Choi

Bhadrinarayana Lalgudi Visweswaran

Christopher Edward Glazowski

Chia-Yu Chen

Shang-Chih Lin

Takahide Ishii

Cheng-Chih Hsieh

Han Liu

Gwanwoo Park

Hui Lu

Ankit Mahajan

Chia-hao Chang

Chih-Hung Yu

Xingfeng He

Yung Fong Kao

Shih Lun Huang

Ko-Wei Chen

David L Wei

Asli Sirman

An electronic device may have a display such as an organic light-emitting diode display. The organic light-emitting diode (OLED) display may have an array of organic light-emitting diode pixels that each have OLED layers interposed between a cathode and an anode. A first passivation layer, a first planarization layer, and a second passivation layer may be formed over the cathode. The first and second passivation layers may be formed from inorganic material. A second planarization layer may be formed over the second passivation layer between the second passivation layer and a polarizer. The second planarization layer may planarize the polarizer at the edges of the active area of the display where the polarizer would otherwise have a steep taper. Planarizing the polarizer in this way mitigates undesirable secondary reflections off of the polarizer. The first and second planarization layers may be formed from organic material.

Organic light-emitting diode displays with planarization layers

An organic light-emitting diode (OLED) display may have an array of organic light-emitting diode pixels that each have OLED layers interposed between a cathode and an anode. Voltage may be applied to the anode of each pixel to control the magnitude of emitted light. The conductivity of the OLED layers may allow leakage current to pass between neighboring anodes in the display. To reduce leakage current and the accompanying cross-talk, the display may include active and/or passive leakage-mitigating structures. The passive leakage-mitigating structures may have an undercut that causes discontinuities in the overlying OLED layers. Active leakage-mitigating structures may include a conductive layer (e.g., a conductive ring) that drains leakage current to ground. Alternatively, the active leakage-mitigating structures may include a gate electrode modulator with a variable voltage that stops the current flow laterally.

Organic light-emitting diode display with passive leakage-reducing structures

Organic light-emitting diode display with active leakage-reducing structures

Growing community of inventors

San Jose, CA, United States of America

Themistoklis Afentakis