Apple Inc.

Gwanwoo Park

Cheng Kai Chen

Rui Liu

Chun-Yao Huang

Sunggu Kang

Andrew C Lin

Enkhamgalan Dorjgotov

Cheuk Chi Lo

Michael Slootsky

Younggu Lee

Jaein Choi

Gloria Wong

Hairong Tang

Wendi Chang

Shih Chang Chang

Ting-Kuo Chang

Chieh-Wei Chen

Shinya Ono

Lei Yuan

Chia-Yu Chen

Jung Yen Huang

Doh-Hyoung Lee

Niva A Ran

Po-Chun Yeh

Jiun-Jye Chang

Ching-Sang Chuang

Chuan-Jung Lin

Themistoklis Afentakis

Caleb Coburn

Yusuke Fujino

Yung Fong Kao

Shih Lun Huang

Chih-Hung Yu

Xingfeng He

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

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 in a display, the pixel definition layer may disrupt continuity of the OLED layers. The pixel definition layer may have an undercut to disrupt continuity of some but not all of the OLED layers. The undercut may be defined by three discrete portions of the pixel definition layer. The undercut may result in a void that is interposed between different portions of the OLED layers to break a leakage path formed by the OLED layers.

Organic light-emitting diode display with pixel definition layers

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Gwanwoo Park