Apple Inc.

Yusuke Fujino

Cheng Kai Chen

Rui Liu

Sunggu Kang

Jaein Choi

Michael Slootsky

Wendi Chang

Gloria Wong

Hairong Tang

Chun-Yao Huang

Teruo Sasagawa

Enkhamgalan Dorjgotov

Andrew C Lin

Cheuk Chi Lo

Younggu Lee

Wookyung Bae

Gwanwoo Park

Kanuo C Kustra

Xiaodan Zhu

Pixels in an organic light-emitting diode (OLED) display 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 anode of the pixels may include both the reflective anode structure and a supplemental anode that is transparent and that is used to tune the thickness of the optical cavity for each pixel. Organic light-emitting diode layers may be formed over the pixels and may have a uniform thickness in each pixel in the display. Pixels may have a conductive spacer between a transparent anode portion and a reflective anode portion, without an intervening dielectric layer. The conductive spacer may be formed from a material such as titanium nitride that is compatible with both anode portions. The transparent anode portions may have varying thicknesses to control the thickness of the optical cavities of the pixels.

Organic light-emitting diode display with patterned anodes and optical cavities

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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Santa Clara, CA, United States of America

Yusuke Fujino