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Organic Light Emitting Diode Display with Reduced Lateral Leakage

A technology of light-emitting diodes and displays, which is applied in semiconductor devices, electric solid-state devices, electrical components, etc., and can solve problems such as deterioration of pixel crosstalk

Active Publication Date: 2022-07-22
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pixel crosstalk due to lateral conduction through OLED layers can worsen with decreasing distance between pixels

Method used

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  • Organic Light Emitting Diode Display with Reduced Lateral Leakage
  • Organic Light Emitting Diode Display with Reduced Lateral Leakage
  • Organic Light Emitting Diode Display with Reduced Lateral Leakage

Examples

Experimental program
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Embodiment Construction

[0042] figure 1An exemplary electronic device of the type that may be provided with a display is shown in . The electronic device 10 may be a computing device such as a laptop computer, a computer monitor including an embedded computer, a tablet computer, a cellular phone, a media player or other hand-held or portable electronic device, a smaller device such as a wristwatch device, hanging devices, headset or earpiece devices, devices embedded in eyeglasses or other devices worn on the user's head, or other wearable or miniature devices), monitors, computer monitors including embedded computers, excluding Computer monitors for embedded computers, gaming devices, navigation devices, embedded systems (such as systems in which electronic devices with displays are installed in kiosks or cars), or other electronic devices. The electronic device 10 may have the shape of a pair of glasses (eg, a support frame), may form a housing having the shape of a helmet, or may have components ...

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Abstract

The present invention provides an organic light emitting diode (OLED) display that can have an array of organic light emitting diode pixels each having an OLED layer interposed between a cathode and an anode. A voltage can be applied to the anode of each pixel to control the amount of light emitted. The conductivity of the OLED layer can allow leakage current to pass between adjacent anodes in the display. In order to reduce leakage current and concomitant crosstalk in the display, the pixel definition layer can disrupt the continuity of the OLED layers. The pixel definition layer may have steep sidewalls, sidewalls with undercuts, or sidewall surfaces with multiple curves to break the continuity of the OLED layer. A control gate coupled to a bias voltage and covered by a gate dielectric can be used to form an organic thin film transistor that closes the leakage current channel between adjacent anodes on the display.

Description

[0001] This patent application claims priority to Provisional Patent Application No. 62 / 507,646, filed May 17, 2017, and Provisional Patent Application No. 62 / 635,433, filed February 26, 2018, which are hereby incorporated by reference in their entirety. Incorporated herein. Background technique [0002] The present invention relates generally to electronic devices, and more particularly to electronic devices having displays. [0003] Electronic devices often include displays. For example, an electronic device may have an organic light emitting diode (OLED) display based on organic light emitting diode pixels. In this type of display, each pixel includes a light-emitting diode and a thin-film transistor that controls the application of a signal to the light-emitting diode to generate light. A light emitting diode may include an OLED layer positioned between an anode and a cathode. [0004] To emit light from a given pixel in an organic light emitting diode display, a voltag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/32
CPCH10K59/123H10K59/124H10K59/121H10K59/125H10K59/122H10K59/131H10K59/805H10K59/173H01L27/124H10K71/00
Inventor 崔在仁A·林罗卓知黄俊尧G·王唐海榕山本均J·E·佩德金起范田广玉袁磊M·斯鲁特斯凯刘睿S·E·莫勒萨康盛球常文迪汤俊明陈宬I·克内兹E·多杰格托夫G·卡博尼G·B·迈尔李正敏
Owner APPLE INC